JB/T 4303-1995 Terminology for heating and cooling ventilation equipment
Some standard content:
Machinery Industry Standards of the People's Republic of China
Heating and cooling ventilation equipment terminology
1 Subject content and scope of application
JB/T4303--95
Replaces JB4303--86||tt| |This standard specifies the basic types, main components, and some commonly used terms of testing and usage of heating and cooling ventilation equipment. This standard applies to heat exchange coils, heaters, fan coils, air curtains, air treatment equipment, heat recovery devices, fume hoods, air outlets and other equipment for heating, ventilation and air conditioning.
This standard does not apply to HVAC equipment with its own cold or heat source, such as window and cabinet air conditioners and fuel, gas, electric heaters, etc.
2 Equipment and Types
2.1 Coil coil
Rib tube heat exchanger for air heating or cooling. The cold (hot) medium flows through the tube, and the air flows through the gaps between the rib tubes. 2.1.1 Heating coil (air heater) heating coil is a ribbed tube heat exchanger used for air heating.
Note: The synonyms in brackets are deprecated, the same below. 2.1.2 Cooling coil (air cooler) coolingcoil is a ribbed tube heat exchanger used for air cooling.
2.2 Fan
A power machine that converts mechanical energy into potential energy and kinetic energy of air and is used to transport air with a total pressure of less than 14.7kPa. 2.2.1 Axial fan axial fan
A fan in which air flows approximately along the axial direction on the cylindrical surface after entering along the axial direction of the impeller. 2.2.2 Centrifugal fan centrifugal fan: After the airflow enters the impeller of the fan axially, it mainly flows in the radial direction. Cross-flow fan (cross-flow fan) cross-flow fan, transverse-flow fan2.2.3
The airflow enters the impeller from one side of the impeller along the direction perpendicular to the axis, passes through the interior of the impeller, and flows through the impeller. The other side discharges the ventilator.
2.2.4 Tube fan tubular fan
A centrifugal fan that the air flows in and out along the axial direction and can be installed on the straight road. 2.2.4.1 Radial-flow tubular fan: The airflow enters the impeller axially, moves in the radial direction, and changes the direction of 90° in the casing before flowing out. 2.2.4.2 Mixed-flow tubular fan is a duct-type fan where the airflow enters the impeller axially and spirally moves diagonally forward to leave the impeller. The flow direction is between the radial and axial directions.
2.2.5 Roof ventilator power roof ventilator is usually an axial flow or centrifugal ventilator installed on the roof for ventilation. 2.2.6 Dust exhausting fan Dust exhausting fan Approved by the Ministry of Machinery Industry of the People's Republic of China on 1995-12-01 30
Implemented on 1996-07-01
JB/T4303—95
Applicable Special ventilator for transporting gases containing dust, wood chips, fibers, etc. Explosion-proof ventilator explosion proof fan2.2.7
refers to a ventilator whose blades or impellers and other rotating parts are made of non-ferrous metals and will not produce sparks when encountering friction and collision. 2.3 Heater unit heater
Hot air equipment composed of coils, ventilators, etc. 2.3.1 Axial flow heater unit heater with axial fan heater equipped with axial flow fan.
Centrifugal heater unit heater with centrifugul fan2.3.2
A heater equipped with a centrifugal fan.
2.3.3 Horizontal-flow unit heater A heater that discharges air in the horizontal direction.
2.3.4 Top-flow unit heater down-flow unit heater is a heater that discharges air downwards.
2.4 Fan coil unit fan coil unit is the terminal device of a centralized air-conditioning system composed of ventilators, coils, etc. 2.4.1 Single coil fan coil unit (ordinary fan coil unit) fan coil unit with single coil is a fan coil unit with only one coil. Double coil fan coil unit fan coil unit with double coil2.4.2
Fan coil unit composed of two sets of cold and hot coils. 2.4.3 Exposed fan coil unit cabinet enclosed fan coil unit has a regular and beautiful shell, which is suitable for fan coil units installed indoors. 2.4.4 Concealed fan coil unit concealed fan coil unit; recessed fan coil unit has a relatively simple casing and is suitable for fan coil units concealed in wall covers and ceilings, with only the air supply and return vents connected to the room. 2.4.5 Vertical fan coil unit floor fan coil unit The coil unit and the fan are installed at the upper and lower parts respectively. The air outlet direction is vertically upward or diagonally forward. There are two types of models: surface-mounted and concealed-mounted. 2.4.6 Horizontal fan coil unit ceiling fan coil unit is a unit in which the coil and the fan are placed front and back in the horizontal direction, with air outflowing in the front and air returning in the rear or lower part. There are two models: surface-mounted and concealed-mounted.
Colurnn type fan coil unit colurnn type fancoil unit2.4.7
A fan coil unit with an aspect ratio much larger than that of ordinary vertical fan coil units with the same air volume. Usually the unit is placed close to the partition wall of the building's pipeline shaft, and there is generally no horizontal water supply and return pipe outside the unit. There are two models: surface-mounted and concealed-mounted. Lowboy fan coil unit lowboyfancoilunit2.4.8
A fan coil unit that is several times smaller in height and width than ordinary vertical fan coil units. The fan and coil are both in a horizontal position. It is generally a suction type, with the air outlet direction upward, and is usually placed along the wall and against the floor. There are two models: surface-mounted and concealed-mounted. 2.4.9 Embedded fan coil unit (ceiling fan coil unit) cassette type fan coil unit is a fan coil unit that is installed concealed in the ceiling, with only the air supply and return vents at the bottom of the casing exposed indoors. 2.4.10 Cabinet type fan coil unit cabinet type fan coil unit is a cabinet type fan coil unit composed of a ventilator, coil, etc. 2.5 Outside air unit heater is a unit that heats fresh air consisting of inlet and outlet louvers, filters, heat coils, fans, cabinets, etc. 2.6 Fresh air handling unit is a large fan coil unit that handles outdoor air. 2.7 air curtain air curtain
31
JB/T 4303—95
A device that uses the curtain-like airflow formed by the outgoing wind to seal the door opening to reduce or isolate the intrusion of outside airflow . It consists of a ventilator, a static pressure box and a strip nozzle.
2.7.1 Heating air curtain (hot air curtain) is an air curtain that can spray hot air. It consists of a ventilator, heat coil and air supply outlet. 2.7.2 Cooling air curtain (cooling air curtain) is an air curtain that can spray out cold air flow. It consists of a ventilator, cold coil and air supply outlet. 2.7.3 Top-blown air curtain downflow air curtain is an air curtain that is installed at the upper part of door openings or other occasions where air flow exchange needs to be blocked and supplies air downward. 2.7.4 Horizontal-flow air curtain is a single-sided or double-sided air curtain with horizontal air supply installed in door openings or other occasions where air flow exchange needs to be blocked. 2.8 Air handling unit air handling unit; air handler is a device that can heat, humidify, cool, dehumidify and purify air. 2.8.1 Unitary air handling unit unitary air handling unit is an integrated air handling equipment composed of ventilator, air heater, air cooler, humidifier and air filter. 2.8.2 Modular air handling unit Air handling equipment assembled from several factory prefabricated parts with different air handling functions according to needs. 2.9 Air to air heat recovery unit Air to air heat recovery unit A device that can transfer heat from one airflow to another to achieve energy saving. 2.9.1 Rotary air to air heat exchanger, heat wheel An air to air heat recovery device that realizes full heat or sensible heat exchange between two airflows by rotating the wheel body and utilizing the heat storage and heat release effects of the heat exchange material inside.
2 9.2 Plate heat exchanger Plate heat exchanger An air to air heat recovery device that conducts indirect heat transfer by alternately flowing two airflows in the channels formed by multiple layers of parallel plates. 2.9.2.1 Plate type heat exchanger Plate type heat exchanger A plate type heat exchanger with a flat plate, a concave-convex plate or a plate with other corrugated shapes as the heat exchange surface. 2.9.2.2 Plate-fin type heat exchanger Plate-fin type heat exchanger A plate heat exchanger with a flat plate and fins placed therein as the heat exchange surface. 2.9.3 Heat pipe type heat exchanger A heat recovery device consisting of a closed tube bundle filled with liquid medium, which transfers heat from one end to the other end by means of repeated vaporization and condensation processes.
Run-around coil for heat recovery2. 9.4
An air-to-air heat recovery device consisting of coils placed in two air flow channels, connecting pipes and a circulating water pump. 2. 10 Fume hood;booth type hood A cabinet-type exhaust hood with only a…· surface open or equipped with an operating sliding door, used to remove harmful gases or particles generated in the operating space of the cabinet. Auxiliary air hood2. 10. 1
In order to save the exhaust volume from the room, a part of the air is supplied by a dedicated pipeline. 2.11 Air opening
A general term for air supply openings (air distributors), return air openings and exhaust air openings. Refers to openings or devices installed on ventilation ducts or static pressure boxes for supplying, returning or exhausting air.
2.11.1 Fixed air openingFixed air openingThe flow section, flow direction, etc. are not adjustable. This type is often used for ordinary return air. 2.11.2 Adjustable air openingThe flow section, flow direction, etc. are adjustable. 32
2.11.3 Grille air openingGrill
JB/T4303—95
The air opening with a grid-like or louver-like flow section. 2.11.3. 1 Mesh type air openingAn air opening composed of a single-layer fixed or double-layer adjustable flow section grid or porous plate. 2. 11.3.2
louver type air opening An air opening consisting of one to three layers of fixed or movable blades. 2.11.4
slot type air opening An air opening with a diversion and adjustment component, and a length-to-width ratio generally greater than 10. swirl diffuser
2.11. 51
An air opening with a component that enables the outlet airflow to swirl. 2.11.6ceiling diffuser An air outlet installed on the ceiling that can form a downward-blowing diffused airflow. 2.11.6.1tray type diffuser A diffuser that forms a diffused airflow by the diversion effect of a disk-shaped object at the air outlet. 2.11.6.2multiflake type diffuser A diffuser that forms a diffused airflow by multiple layers of straight sheets or streamlined guide sheets. 2.11.6.3 Perforated panel diffuser A diffuser with regularly arranged, equal or different sized holes is set on the outlet section. 2 Variable air volume (VAV) terminal unit 2.12
A device that automatically adjusts the air supply volume according to the changes in the load of the air-conditioned room to maintain the required parameters in the room. 2.12.1 Throttle type VAV terminal unit A variable air volume terminal unit that adjusts the air supply volume by adjusting the air outlet section. Bypass type VAV terminal unit 2. 12.2
A variable air volume terminal unit that adjusts the air supply volume through a diversion mechanism. 2.12.3 Induction type VAV terminal unit A variable air volume terminal unit that adjusts the induced amount of the supply air to the indoor air to adapt to the changes in the indoor load. 2.13 Air damper
A device that adjusts or blocks the air flow.
2.13.1 Parallel multiblade damper A damper composed of a group of parallel blades rotating in the same direction. 2.13.2 Opposed multiblade damper A damper with adjacent blades rotating in opposite directions. 2. 13.3 Butterfly damper A damper used to adjust the air volume.
2.13.4 Diamond-shaped damper A damper that adjusts the air volume by changing the cross-sectional shape of the diamond-shaped blades and the cross-sectional shape of the airflow channel. 3 Main components and construction
cail construction
3.1 Coil construction
3.1.1 Finned tube
A heat exchange tube with ribs or fins on the tube wall.
3. 1.2 Finned tube bundle A plurality of finned tubes arranged at a certain spacing to form a whole. 33
3. 1.3 Wound spiral fin tubeJB/T4303—95
A fin tube formed by continuously spirally winding a metal sheet onto a metal smooth tube. 3. 1.3.1 Wound smooth fin tubeA spiral fin tube with smooth fin surface and thin outer edge formed by winding a metal strip with good ductility such as copper or aluminum onto a smooth tube. The rib root is often pressed into type I or II. The short side is close to the tube, and the long side is the fin. Wound crimped fin tube3. 1.3.2
A spiral fin tube with corrugations on the inner edge formed by pressing corrugations on one side of the metal strip and then winding it onto a smooth tube. Petal type spiral fin tube3.1.3.3
A spiral fin tube with petal-shaped fins formed by rolling a uniform cut on one side of the metal strip and then winding it onto a smooth tube, and the cut naturally cracks.
Spoke wheel type spiral fin tube3.1.3.4bZxz.net
A series of narrow holes perpendicular to the edge are punched out on the metal strip, and the strip is spirally wound onto the smooth tube to form a spiral fin tube with spoke-shaped fins.
3.1.3.5Special tube with spiral finSpecial tube with spiral finA ribbed tube formed by continuously winding a strip of metal sheet onto a special-shaped tube with an elliptical, streamlined (streamline type), dripping fluid type, etc. cross-section. The most common is the ellipse tube with spiral fin3. 1. 4 Cross fins tubeplate collar fins tubeThe metal sheet is punched and flanging, or corrugated or tortuous is punched out at the same time, and then it is put on the tube one by one, and the rib root and the tube are tightly fitted by immersion plating or mechanical or hydraulic expansion. 3.1.4.1. Individual plate fins tube. The fins are either square or round and are set on a single tube. Tube-type fins continuous plate fins tube3.1.4.2
The plate-shaped fins are punched with corresponding holes according to the tube bundle arrangement size, and then set on the tube bundle one by one to form a rib tube. 3.1.4.3 Corrugated plate fins tube The plate-shaped fins of corrugated plate fins tube are corrugated along the direction of air flow. Zigzag fins tube folded plate fins tube3.1.4.4
The plate fins of the casing tube are folded along the direction of the air flow. 3. 1. 4.5 Slit fins tube; Louver fins tube is a fin tube with various regular gaps stamped on the plate-shaped fins. 3.1.5 Inlaid fin tube
A spiral shallow groove is pressed out on the outer wall of the light pipe. A thin metal strip is wound along the shallow groove, and the inner edge is embedded in the groove to form a smooth spiral rib. After rolling or other The method is to closely inlay the fins and tubes into a ribbed tube. The tube and fin materials may be the same or different. 3.7.6 Rolled integral fin tube is a special tool used for thick-walled metal pipes. It is cold-rolled to form smooth spiral fins on the outer wall. The tube and the fins are naturally integrated. 3.1.6.1 Composite rolled tube complex tube with integral fin is a rolled tube lined with inner tubes made of other materials.
3.1.7 welded fins tube
The fin tube is formed by welding the fins to the light pipe after the fins are set or wound on the metal light pipe. 3.1.8 The size of fin tube is the main size that characterizes the geometry of the fin tube. 3.1.8.1 Fin thickness generally refers to the average thickness of the fins, and its value is usually determined by the average of the thicknesses at the root and end of the fins. 34
3.1.8.2 Fin height fin height
JB/T 4303--95
The dimension along the radial direction of the rib tube from the fin root to the rib end, for non-circular fins is its average size. 3.1.8.3 Fin spacing; fin pitch is the spacing between two adjacent fins. Its value can be determined by dividing the unit fin tube length by dividing the number of fins minus one. 3.1.9 Size of tube bundle represents the main geometric size of tube bundle features. 3.1.9. 1 Tube pitch; tube spacing is the distance between the centers of adjacent tubes on the same row of tubes in the tube bundle. 3. 1. 9. 2
tube grid spacing
The center distance of adjacent tube rows in the tube bundle. 3.1.9.3
The bank of tubes in line is along the air flow, and the tube centers of each row of tubes in the tube bundle are on the same straight line. 3.1.9.4 The bank of staggered tubes is along the air flow direction. The centers of adjacent tube rows in the tube bundle are not on the same straight line. Often the tube center of a certain tube row is exactly on the center line of the adjacent tube row.
Once-through type coil3.1.9. 51
The flow direction of the cooling (hot) medium in all heat exchange tubes is consistent and passes through the coil once. Single return circuit coil3. 1. 9.61
A coil in which the cold (hot) medium flows back and forth in the heat exchange tube passage. Multi-return coil multi-return circuit coil3.1.9.7
A coil in which the cold (hot) medium flows back and forth more than once in the heat exchange tube passage. 3.1.10 coil component3. 1. 10. 1 Tube plate; tube sheet is used to fix the tube bundle and form a regularly arranged plate. 3.1.10.2
Header
is connected to the inlet or outlet end of the heat exchanger tube bundle, with a cold (hot) medium inlet or outlet connecting tube head to distribute or collect the internal cooling of the tube bundle (Heat) medium-acting box or round tube. 3. 1. 10.3 Pipe connection tube connection is a short connecting pipe that leads to or leads out the cold (hot) medium on the header box. Baffle plate
3. 1. 10. 4
A baffle in the header box that changes the flow direction of the cold (hot) medium. U-shaped tube U bend
3. 1. 10. 51
A heat exchange tube part that connects the tube bundle and changes the flow direction of the cold (hot) medium. Air vent; air eliminator3. 1. 10.6
A valve used to remove air.
drain plug
3. 1.10.7
Parts used to remove water. | |tt | 3.2.1.1 Wheel cover (front disc) side disc; impeller rim is a disc with fixed blades on the gas inlet side of a centrifugal impeller. 3.2.1.2 Main disc; backplate35
JB/T 4303--95
The disc in the centrifugal impeller that is connected to the hub and fixes the blades. 3.2.1.3 Hub (shaft disc) hub boss
The part that connects the main shaft and the wheel disc in centrifugal and axial flow impellers. 3.2.1.4
closed impeller
Centrifugal impeller with disc and wheel cover. 5 semi-open impeller semiopen impeller3.2.1.5
Centrifugal impeller without wheel cover.
3.2.1.6 Open impeller is a centrifugal impeller with only blades and hub, but no disc or wheel cover. Cantilever impeller overhang type impeller3.2.1.7
The impeller is installed at the shaft extension end. The bearing is on one side of the impeller. Double-supported impeller center impeller type3.2.1.83
The impeller is installed between the two supports of the shaft. 3.2.2 Blade blade
The part in the fan that interacts with the air flow, transfers mechanical energy to the gas, or changes the air flow speed and pressure, and changes the air flow direction. 3.2.2.1 Forward-curved blades are centrifugal impeller blades with a blade outlet geometric angle greater than 90°. The impeller with such blades is also called a sirocco blade wheel.
Radial blades radial-tipped blades3.2.2.22
Centrifugal blades with a blade outlet geometric angle equal to 90°. 3.2.2.3 Backward-curved blades: centrifugal blades whose blade exit geometric angle is less than 90°. Arc blade curved blade
3.2.2.4
The blade cross section is of equal thickness, its center surface is an arc cylinder, and the curvature of the arc can be equal or unequal airfoil blades aerofoil blade
3.2.2.5
A blade with an airfoil cross section.
3.2.2.6 plate blade plate blade
The center line of the blade shape is a straight line, and the cross-section is a blade of equal thickness. Twisted blade twist blade
3.2.2.7
A blade that is twisted in space.
straight blade
3.2.2.81
A blade that is not distorted in each section along the height of the blade. 3.2.3 Casing casing
The casing of the fan.
volute casing
3. 2. 3.1
The part of the casing that leads the gas from the impeller outlet to the outside of the fan body, usually a spiral casing. Fan suction inlet conezinlet ring3.2. 3.21
A device that makes the airflow into the fan even, usually in the shape of a cone. Single-suction type3.2.3.31
The airflow enters from one side of the centrifugal fan casing. Double-suction type3.2.3. 4
The airflow enters from both sides of the centrifugal fan casing. 3.2.3.5 Inlet screen inlet screen36
The net at the suction door to prevent inlet debris. | |tt | . 3.2.3.7 Fairing cowl
The streamlined shell that matches the hub at the entrance of the axial air intake fan. 3.2.3.8 Prewhirler vane is a set of blades that change the direction of the airflow so that the airflow is more evenly aligned with the casing. In axial flow fans, they can be divided into front diffuser, middle diffuser and rear diffuser according to their relative position to the impeller. Fan base (chassis) base plate
3.2.3.9
is used to place and fix components such as fans, transmissions, prime movers, etc. 3.2.3.10 Shock-absorber is a spring or rubber product that cushions the movement of the fan and is placed between the fan base and supports such as the ground or floor. 3.2.4 Mechanical transmission mechanical transmission 3.2.4.1 Direct drive direct drive
The fan and motor are linearly connected by a common shaft or coupling star. 3.2.4.2
Coupling drive
A transmission method that uses a coupling to directly connect the two shafts of the fan and the motor and make them rotate simultaneously. Belt drive belt drive
3.2.4.3
consists of one or several belts tightly connected to two wheels mounted on the motor and fan shafts respectively, and uses friction to drive indirectly.
3.2.4.4 belt wheel
The main component of the belt drive, the driven wheel installed on the fan impeller shaft, and the driving wheel installed on the motor shaft. 3.2.4.5 Guide rail rack rail
is used to adjust the relative position of the motor and the ventilator to tighten the belt. The base of the motor is placed on it. 3.3 Fan-coil component fan-coil component condensate drain pan3.3.1
A drain pan that receives condensate water.
3.3.2 Speed ??control switch speed control switch is a switch that changes the speed of the motor.
3.3.3 Thermostat thermostat
An automatic control device that operates according to temperature changes and is used to maintain the controlled object within a certain temperature range. 3.3.4 Temperature relay - a relay that operates when the temperature reaches a certain value. It is generally equipped with sensitive components such as bimetallic sheets or liquid temperature bulbs that can vaporize and expand.
3.3.5 solenoid valve solenoid valve
This valve uses an electromagnet as the power element, and uses the suction and release of the electromagnet to control the on-off state of small-diameter valves. 3.3.6 Electric two-way valve motorized 2-way valve is an actuator composed of an electric actuator and a two-way valve. 3.3.7 Motorized 3-way valve is an actuator composed of an electric actuator and a three-way valve. 3.4 The component of modular air handling unit3. 4.1 The unit functional section air handling section constitutes a modular air handling unit, which is a combined unit that can realize certain processing functions of air. 37 | | tt | 3.4.2.1 The supply fan section is a fan unit mainly used to overcome the resistance of the air supply path. 3.4.2.2 Return fan section The return fan section device is a fan unit mainly used to overcome the resistance of the return air and exhaust passages. 3.4.2.3 The exhaust fan section is a fan unit used to discharge air from the air conditioning system to the outside. 3.4.3 Filter section
A prefabricated unit that installs an air filter in a combined air handling unit. 3.4.3.1 The roughing filter section is a prefabricated unit equipped with a coarse-effect air filter that mainly filters coarse dust particles with a particle size of 5um or more. 3.4.3.2 Medium efficiency air filter section The medium efficiency air filter section is a prefabricated unit equipped with an air filter with medium filtration efficiency for dust particles with a particle size of 3 to 10 μm. 3.4.3.3 High efficiency air filter section is a prefabricated unit that installs an air filter with a counting efficiency of 70% to 90% for laboratory atmospheric dust particles equal to or larger than 1 μm.
3. 4. 3.4 Sub-high effieiency particulate air filter section is installed to filter air with a counting efficiency of 95%~~99.9% for laboratory atmospheric dust equal to or greater than 0.5μm dust particles. prefabricated unit.
3.4.3.5 panel-type air filter panel-type air filter is a flat unit air filter that is often assembled in a herringbone installation in the filter section. 3.4.3.6 Automatic-roll air filter The rolled filter material is supported and tightened by the driving and driven shafts on opposite sides of the filter section, and part of its width is covered with the filter section. When the filter material accumulates dust and the resistance increases to a specified value, it will automatically roll from the unused side to the used side. The one that is wound in the up and down direction is called the vertical winding type, and the one that is wound in the left and right direction is called the horizontal winding type. 3.4.3.7 Automatic-cleaning air air filter is an air filter with a movable suction nozzle that automatically cleans dust accumulated on the filter material. 3.4.3.8 Bag-type air filter is an air filter in which the filter material is made into a bag shape. It is usually composed of multiple bags connected in parallel. When it is only a single bag, it is called a basket-type air filter. ).
3.4.3.9 folded media-type air filter The filter material is assembled into a pleated air filter using partitions or belts. 3. 4. 3. 10 Electrostatic filter The electrostatic preciptator is composed of components such as a corona electrode and a dust collector. Under the action of a high-voltage electric field, particles in the airflow are charged and adsorbed to the filter on the dust collector.
3.4.4 Water spray section spray sections spray chamber is a unit that uses water sprayed into mist and at different temperatures to directly contact the air to perform heating, humidification, cooling, drying and other processing processes or to perform washing functions.
3.4.4.1 spray nozzle
The component in the spray chamber that sprays water into mist. 3.4.4.2 Nozzle discharge pipe The spraying bank nozzle and its water supply pipe are called nozzle discharge pipe. 38
31
The airflow enters from one side of the centrifugal fan casing. Double-suction type3.2.3. 4
The airflow enters from both sides of the centrifugal fan casing. 3.2.3.5 Inlet screen inlet screen36
The net at the suction door to prevent inlet debris. | |tt | . 3.2.3.7 Fairing cowl
The streamlined shell that matches the hub at the entrance of the axial air intake fan. 3.2.3.8 Prewhirler vane is a set of blades that change the direction of the airflow so that the airflow is more evenly aligned with the casing. In axial flow fans, they can be divided into front deflectors, middle deflectors and rear deflectors according to their relative position to the impeller. Fan base (chassis) base plate
3.2.3.9
is used to place and fix components such as fans, transmissions, prime movers, etc. 3.2.3.10 Shock-absorber is a spring or rubber product that cushions the movement of the fan and is placed between the base of the fan and supports such as the ground or floor. 3.2.4 Mechanical transmission mechanical transmission 3.2.4.1 Direct drive direct drive
The fan and motor are linearly connected by a common shaft or coupling star. 3.2.4.2
Coupling drive
A transmission method that uses a coupling to directly connect the two shafts of the fan and the motor and make them rotate simultaneously. Belt drive belt drive
3.2.4.3
consists of one or several belts tightly connected to two wheels mounted on the motor and fan shafts respectively, and uses friction to drive indirectly.
3.2.4.4 belt wheel
The main component of the belt drive, the driven wheel installed on the fan impeller shaft, and the driving wheel installed on the motor shaft. 3.2.4.5 Guide rail rack rail
is a device used to adjust the relative position of the motor and the ventilator to tighten the belt, and the base of the motor is placed on it. 3.3 Fan-coil component fan-coil component condensate drain pan3.3.1
A drain pan that receives condensate water.
3.3.2 Speed ??control switch speed control switch is a switch that changes the speed of the motor.
3.3.3 Thermostat thermostat
An automatic control device that operates according to temperature changes and is used to maintain the controlled object within a certain temperature range. 3.3.4 Temperature relay - a relay that operates when the temperature reaches a certain value. It is generally equipped with sensitive components such as bimetallic sheets or liquid temperature bulbs that can vaporize and expand.
3.3.5 solenoid valve solenoid valve
This valve uses an electromagnet as the power element, and uses the suction and release of the electromagnet to control the on-off state of small-diameter valves. 3.3.6 Electric two-way valve motorized 2-way valve is an actuator composed of an electric actuator and a two-way valve. 3.3.7 Motorized 3-way valve is an actuator composed of an electric actuator and a three-way valve. 3.4 The component of modular air handling unit3. 4.1 The unit functional section air handling section constitutes a modular air handling unit, which is a combined unit that can realize certain processing functions of air. 37 | | tt | 3.4.2.1 The supply fan section is a fan unit mainly used to overcome the resistance of the air supply path. 3.4.2.2 Return fan section The return fan section device is a fan unit mainly used to overcome the resistance of the return air and exhaust passages. 3.4.2.3 The exhaust fan section is a fan unit used to discharge air from the air conditioning system to the outside. 3.4.3 Filter section filter section
A prefabricated unit that installs an air filter in a combined air handling unit. 3.4.3.1 The roughing filter section is a prefabricated unit equipped with a coarse-effect air filter that mainly filters coarse dust particles with a particle size of 5um or more. 3.4.3.2 Medium efficiency air filter section The medium efficiency air filter section is a prefabricated unit equipped with an air filter with medium filtration efficiency for dust particles with a particle size of 3 to 10 μm. 3.4.3.3 High efficiency air filter section is a prefabricated unit that installs an air filter with a counting efficiency of 70% to 90% for laboratory atmospheric dust particles equal to or larger than 1 μm.
3. 4. 3.4 Sub-high effieiency particulate air filter section is installed to filter air with a counting efficiency of 95%~~99.9% for laboratory atmospheric dust equal to or greater than 0.5μm dust particles. prefabricated unit.
3.4.3.5 panel-type air filter panel-type air filter is a flat unit air filter that is often assembled in a herringbone installation in the filter section. 3.4.3.6 Automatic-roll air filter The rolled filter material is supported and tightened by the driving and driven shafts on opposite sides of the filter section, and part of its width is covered with the filter section. When the filter material accumulates dust and the resistance increases to a specified value, it will automatically roll from the unused side to the used side. The one that is wound up and down is called the vertical winding type, and the one that is wound left and right is called the horizontal winding type. 3.4.3.7 Automatic-cleaning air air filter is an air filter with a movable suction nozzle that automatically cleans dust accumulated on the filter material. 3.4.3.8 Bag-type air filter is an air filter in which the filter material is made into a bag shape. It is usually composed of multiple bags connected in parallel. When it is only a single bag, it is called a basket-type air filter. ).
3.4.3.9 folded media-type air filter The filter material is assembled into a pleated air filter using partitions or belts. 3. 4. 3. 10 Electrostatic filter The electrostatic preciptator is composed of components such as a corona electrode and a dust collector. Under the action of a high-voltage electric field, particles in the airflow are charged and adsorbed to the filter on the dust collector.
3.4.4 Spray sections spray chamber is a unit that uses water sprayed into mist and at different temperatures to directly contact the air to perform heating, humidification, cooling, drying and other processing processes or to perform washing functions.
3.4.4.1 spray nozzle
The component in the spray chamber that sprays water into mist. 3.4.4.2 Nozzle discharge pipe The spraying bank nozzle and its water supply pipe are called nozzle discharge pipe. 38
31
The airflow enters from one side of the centrifugal fan casing. Double-suction type3.2.3. 4
The airflow enters from both sides of the centrifugal fan casing. 3.2.3.5 Inlet screen inlet screen36
The net at the suction door to prevent inlet debris. | |tt | . 3.2.3.7 Fairing cowl
The streamlined shell that matches the hub at the entrance of the axial air intake fan. 3.2.3.8 Prewhirler vane is a set of blades that change the direction of the airflow so that the airflow is more evenly aligned with the casing. In axial flow fans, they can be divided into front deflectors, middle deflectors and rear deflectors according to their relative position to the impeller. Fan base (chassis) base plate
3.2.3.9
is used to place and fix components such as fans, transmissions, prime movers, etc. 3.2.3.10 Shock-absorber is a spring or rubber product that cushions the movement of the fan and is placed between the base of the fan and supports such as the ground or floor. 3.2.4 Mechanical transmission mechanical transmission 3.2.4.1 Direct drive direct drive
The fan and motor are linearly connected by a common shaft or coupling star. 3.2.4.2
Coupling drive
A transmission method that uses a coupling to directly connect the two shafts of the fan and the motor and make them rotate simultaneously. Belt drive belt drive
3.2.4.3
consists of one or several belts tightly connected to two wheels mounted on the motor and fan shafts respectively, and uses friction to drive indirectly.
3.2.4.4 belt wheel
The main component of the belt drive, the driven wheel installed on the fan impeller shaft, and the driving wheel installed on the motor shaft. 3.2.4.5 Guide rail rack rail
is used to adjust the relative position of the motor and the ventilator to tighten the belt. The base of the motor is placed on it. 3.3 Fan-coil component fan-coil component condensate drain pan3.3.1
A drain pan that receives condensate water.
3.3.2 Speed ??control switch speed control switch is a switch that changes the speed of the motor.
3.3.3 Thermostat thermostat
An automatic control device that operates according to temperature changes and is used to maintain the controlled object within a certain temperature range. 3.3.4 Temperature relay - a relay that operates when the temperature reaches a certain value. It is generally equipped with sensitive components such as bimetallic sheets or liquid temperature bulbs that can vaporize and expand.
3.3.5 solenoid valve solenoid valve
This valve uses an electromagnet as the power element, and uses the suction and release of the electromagnet to control the on-off state of small-diameter valves. 3.3.6 Electric two-way valve motorized 2-way valve is an actuator composed of an electric actuator and a two-way valve. 3.3.7 Motorized 3-way valve is an actuator composed of an electric actuator and a three-way valve. 3.4 The component of modular air handling unit3. 4.1 The unit functional section air handling section constitutes a modular air handling unit, which is a combined unit that can realize certain processing functions of air. 37 | | tt | 3.4.2.1 The supply fan section is a fan unit mainly used to overcome the resistance of the air supply path. 3.4.2.2 Return fan section The return fan section device is a fan unit mainly used to overcome the resistance of the return air and exhaust passages. 3.4.2.3 The exhaust fan section is a fan unit used to discharge air from the air conditioning system to the outside. 3.4.3 Filter section filter section
A prefabricated unit that installs an air filter in a combined air handling unit. 3.4.3.1 The roughing filter section is a prefabricated unit equipped with a coarse-effect air filter that mainly filters coarse dust particles with a particle size of 5um or more. 3.4.3.2 Medium efficiency air filter section The medium efficiency air filter section is a prefabricated unit equipped with an air filter with medium filtration efficiency for dust particles with a particle size of 3 to 10 μm. 3.4.3.3 High efficiency air filter section is a prefabricated unit that installs an air filter with a counting efficiency of 70% to 90% for laboratory atmospheric dust particles equal to or larger than 1 μm.
3. 4. 3.4 Sub-high effieiency particulate air filter section is installed to filter air with a counting efficiency of 95%~~99.9% for laboratory atmospheric dust equal to or greater than 0.5μm dust particles. prefabricated unit.
3.4.3.5 panel-type air filter panel-type air filter is a flat unit air filter that is often assembled in a herringbone installation in the filter section. 3.4.3.6 Automatic-roll air filter The rolled filter material is supported and tightened by the driving and driven shafts on opposite sides of the filter section, and part of its width is covered with the filter section. When the filter material accumulates dust and the resistance increases to a specified value, it will automatically roll from the unused side to the used side. The one that is wound in the up and down direction is called the vertical winding type, and the one that is wound in the left and right direction is called the horizontal winding type. 3.4.3.7 Automatic-cleaning air air filter is an air filter with a movable suction nozzle that automatically cleans dust accumulated on the filter material. 3.4.3.8 Bag-type air filter is an air filter in which the filter material is made into a bag shape. It is usually composed of multiple bags connected in parallel. When it is only a single bag, it is called a basket-type air filter. ).
3.4.3.9 folded media-type air filter The filter material is assembled into a pleated air filter using partitions or belts. 3. 4. 3. 10 Electrostatic filter The electrostatic preciptator is composed of components such as a corona electrode and a dust collector. Under the action of a high-voltage electric field, particles in the airflow are charged and adsorbed to the filter on the dust collector.
3.4.4 Spray sections spray chamber is a unit that uses water sprayed into mist and at different temperatures to directly contact the air to perform heating, humidification, cooling, drying and other processing processes or to perform washing functions.
3.4.4.1 spray nozzle
The component in the spray chamber that sprays water into mist. 3.4.4.2 Nozzle discharge pipe The spraying bank nozzle and its water supply pipe are called nozzle discharge pipe. 38
7 Fairing cowl
A streamlined housing that matches the hub at the entrance of the axial air intake fan. 3.2.3.8 Prewhirler vane is a set of blades that change the direction of the airflow so that the airflow is more evenly aligned with the casing. In axial flow fans, they can be divided into front deflectors, middle deflectors and rear deflectors according to their relative position to the impeller. Fan base (chassis) base plate
3.2.3.9
is used to place and fix components such as fans, transmissions, prime movers, etc. 3.2.3.10 Shock-absorber is a spring or rubber product that cushions the movement of the fan and is placed between the base of the fan and supports such as the ground or floor. 3.2.4 Mechanical transmission mechanical transmission 3.2.4.1 Direct drive direct drive
The fan and motor are linearly connected by a common shaft or coupling star. 3.2.4.2
Coupling drive
A transmission method that uses a coupling to directly connect the two shafts of the fan and the motor and make them rotate simultaneously. Belt drive belt drive
3.2.4.3
consists of one or several belts tightly connected to two wheels mounted on the motor and fan shafts respectively, and uses friction to drive indirectly.
3.2.4.4 belt wheel
The main component of the belt drive, the driven wheel installed on the fan impeller shaft, and the driving wheel installed on the motor shaft. 3.2.4.5 Guide rail rack rail
is used to adjust the relative position of the motor and the ventilator to tighten the belt. The base of the motor is placed on it. 3.3 Fan-coil component fan-coil component condensate drain pan3.3.1
A drain pan that receives condensate water.
3.3.2 Speed ??control switch speed control switch is a switch that changes the speed of the motor.
3.3.3 Thermostat thermostat
An automatic control device that acts according to temperature changes and is used to maintain the controlled object within a certain temperature range. 3.3.4 Temperature relay - a relay that operates when the temperature reaches a certain value. It is generally equipped with sensitive components such as bimetallic sheets or liquid temperature bulbs that can vaporize and expand.
3.3.5 solenoid valve solenoid valve
This valve uses an electromagnet as the power element, and uses the suction and release of the electromagnet to control the on-off state of small-diameter valves. 3.3.6 Electric two-way valve motorized 2-way valve is an actuator composed of an electric actuator and a two-way valve. 3.3.7 Motorized 3-way valve is an actuator composed of an electric actuator and a three-way valve. 3.4 The component of modular air handling unit3. 4.1 The unit functional section air handling section constitutes a modular air handling unit, which is a combined unit that can realize certain processing functions of air. 37 | | tt | 3.4.2.1 The supply fan section is a fan unit mainly used to overcome the resistance of the air supply path. 3.4.2.2 Return fan section The return fan section device is a fan unit mainly used to overcome the resistance of the return air and exhaust passages. 3.4.2.3 The exhaust fan section is a fan unit used to discharge air from the air conditioning system to the outside. 3.4.3 Filter section filter section
A prefabricated unit that installs an air filter in a combined air handling unit. 3.4.3.1 The roughing filter section is a prefabricated unit equipped with a coarse-effect air filter that mainly filters coarse dust particles with a particle size of 5um or more. 3.4.3.2 Medium efficiency air filter section The medium efficiency air filter section is a prefabricated unit equipped with an air filter with medium filtration efficiency for dust particles with a particle size of 3 to 10 μm. 3.4.3.3 High efficiency air filter section is a prefabricated unit that installs an air filter with a counting efficiency of 70% to 90% for laboratory atmospheric dust particles equal to or larger than 1 μm.
3. 4. 3.4 Sub-high effieiency particulate air filter section is installed to filter air with a counting efficiency of 95%~~99.9% for laboratory atmospheric dust equal to or greater than 0.5μm dust particles. prefabricated unit.
3.4.3.5 panel-type air filter panel-type air filter is a flat unit air filter that is often assembled in a herringbone installation in the filter section. 3.4.3.6 Automatic-roll air filter The rolled filter material is supported and tightened by the driving and driven shafts on opposite sides of the filter section, and part of its width is covered with the filter section. When the filter material accumulates dust and the resistance increases to a specified value, it will automatically roll from the unused side to the used side. The one that is wound up and down is called the vertical winding type, and the one that is wound left and right is called the horizontal winding type. 3.4.3.7 Automatic-cleaning air air filter is an air filter with a movable suction nozzle that automatically cleans dust accumulated on the filter material. 3.4.3.8 Bag-type air filter is an air filter in which the filter material is made into a bag shape. It is usually composed of multiple bags connected in parallel. When it is only a single bag, it is called a basket-type air filter. ).
3.4.3.9 folded media-type air filter The filter material is assembled into a pleated air filter using partitions or belts. 3. 4. 3. 10 Electrostatic filter The electrostatic preciptator is composed of components such as a corona electrode and a dust collector. Under the action of a high-voltage electric field, particles in the airflow are charged and adsorbed to the filter on the dust collector.
3.4.4 Water spray section spray sections spray chamber is a unit that uses water sprayed into mist and at different temperatures to directly contact the air to perform heating, humidification, cooling, drying and other processing processes or to perform washing functions.
3.4.4.1 spray nozzle
The component in the spray chamber that sprays water into mist. 3.4.4.2 Nozzle discharge pipe The spraying bank nozzle and its water supply pipe are called nozzle discharge pipe. 38
7 Fairing cowl
A streamlined housing that matches the hub at the entrance of the axial air intake fan. 3.2.3.8 Prewhirler vane is a set of blades that change the direction of the airflow so that the airflow is more evenly aligned with the casing. In axial flow fans, they can be divided into front deflectors, middle deflectors and rear deflectors according to their relative position to the impeller. Fan base (chassis) base plate
3.2.3.9
is used to place and fix components such as fans, transmissions, prime movers, etc. 3.2.3.10 Shock-absorber is a spring or rubber product that cushions the movement of the fan and is placed between the base of the fan and supports such as the ground or floor. 3.2.4 Mechanical transmission mechanical transmission 3.2.4.1 Direct drive direct drive
The fan and motor are linearly connected by a common shaft or coupling star. 3.2.4.2
Coupling drive
A transmission method that uses a coupling to directly connect the two shafts of the fan and the motor and make them rotate simultaneously. Belt drive belt drive
3.2.4.3
consists of one or several belts tightly connected to two wheels mounted on the motor and fan shafts respectively, and uses friction to drive indirectly.
3.2.4.4 belt wheel
The main component of the belt drive, the driven wheel installed on the fan impeller shaft, and the driving wheel installed on the motor shaft. 3.2.4.5 Guide rail rack rail
is used to adjust the relative position of the motor and the ventilator to tighten the belt. The base of the motor is placed on it. 3.3 Fan-coil component fan-coil component condensate drain pan3.3.1
A drain pan that receives condensate water.
3.3.2 Speed ??control switch speed control switch is a switch that changes the speed of the motor.
3.3.3 Thermostat thermostat
An automatic control device that operates according to temperature changes and is used to maintain the controlled object within a certain temperature range. 3.3.4 Temperature relay - a relay that operates when the temperature reaches a certain value. It is generally equipped with sensitive components such as bimetallic sheets or liquid temperature bulbs that can vaporize and expand.
3.3.5 solenoid valve solenoid valve
This valve uses an electromagnet as the power element, and uses the suction and release of the electromagnet to control the on-off state of small-diameter valves. 3.3.6 Electric two-way valve motorized 2-way valve is an actuator composed of an electric actuator and a two-way valve. 3.3.7 Motorized 3-way valve is an actuator composed of an electric actuator and a three-way valve. 3.4 The component of modular air handling unit3. 4.1 The unit functional section air handling section constitutes a modular air handling unit, which is a combined unit that can realize certain processing functions of air. 37 | | tt | 3.4.2.1 The supply fan section is a fan unit mainly used to overcome the resistance of the air supply path. 3.4.2.2 Return fan section The return fan section device is a fan unit mainly used to overcome the resistance of the return air and exhaust passages. 3.4.2.3 The exhaust fan section is a fan unit used to discharge air from the air conditioning system to the outside. 3.4.3 Filter section filter section
A prefabricated unit that installs an air filter in a combined air handling unit. 3.4.3.1 The roughing filter section is a prefabricated unit equipped with a coarse-effect air filter that mainly filters coarse dust particles with a particle size of 5um or more. 3.4.3.2 Medium efficiency air filter section The medium efficiency air filter section is a prefabricated unit equipped with an air filter with medium filtration efficiency for dust particles with a particle size of 3 to 10 μm. 3.4.3.3 High efficiency air filter section is a prefabricated unit that installs an air filter with a counting efficiency of 70% to 90% for laboratory atmospheric dust particles equal to or larger than 1 μm.
3. 4. 3.4 Sub-high effieiency particulate air filter section is installed to filter air with a counting efficiency of 95%~~99.9% for laboratory atmospheric dust equal to or greater than 0.5μm dust particles. prefabricated unit.
3.4.3.5 panel-type air filter panel-type air filter is a flat unit air filter that is often assembled in a herringbone installation in the filter section. 3.4.3.6 Automatic-roll air filter The rolled filter material is supported and tightened by the driving and driven shafts on opposite sides of the filter section, and part of its width is covered with the filter section. When the filter material accumulates dust and the resistance increases to a specified value, it will automatically roll from the unused side to the used side. The one that is wound up and down is called the vertical winding type, and the one that is wound left and right is called the horizontal winding type. 3.4.3.7 Automatic-cleaning air air filter is an air filter with a movable suction nozzle that automatically cleans dust accumulated on the filter material. 3.4.3.8 Bag-type air filter is an air filter in which the filter material is made into a bag shape. It is usually composed of multiple bags connected in parallel. When it is only a single bag, it is called a basket-type air filter. ).
3.4.3.9 folded media-type air filter The filter material is assembled into a pleated air filter using partitions or belts. 3. 4. 3. 10 Electrostatic filter The electrostatic preciptator is composed of components such as a corona electrode and a dust collector. Under the action of a high-voltage electric field, particles in the airflow are charged and adsorbed to the filter on the dust collector.
3.4.4 Water spray section spray sections spray chamber is a unit that uses water sprayed into mist and at different temperatures to directly contact the air to perform heating, humidification, cooling, drying and other processing processes or to perform washing functions.
3.4.4.1 spray nozzle
The component in the spray chamber that sprays water into mist. 3.4.4.2 Nozzle discharge pipe The spraying bank nozzle and its water supply pipe are called nozzle discharge pipe. 38
3
One or several belts are tightly connected to two wheels respectively installed on the motor and fan shafts, and are indirectly driven by friction.
3.2.4.4 belt wheel
The main component of the belt drive, the driven wheel is installed on the fan impeller shaft, and the driving wheel is installed on the motor shaft. 3.2.4.5 Guide rail rack rail
is used to adjust the relative position of the motor and the ventilator to tighten the belt. The base of the motor is placed on it. 3.3 Fan-coil component fan-coil component condensate drain pan3.3.1
A drain pan that receives condensate water.
3.3.2 Speed ??control switch speed control switch is a switch that changes the speed of the motor.
3.3.3 Thermostat thermostat
An automatic control device that operates according to temperature changes and is used to maintain the controlled object within a certain temperature range. 3.3.4 Temperature relay - a relay that operates when the temperature reaches a certain value. It is generally equipped with sensitive components such as bimetallic sheets or liquid temperature bulbs that can vaporize and expand.
3.3.5 solenoid valve solenoid valve
This valve uses an electromagnet as the power element, and uses the suction and release of the electromagnet to control the on-off state of small-diameter valves. 3.3.6 Electric two-way valve motorized 2-way valve is an actuator composed of an electric actuator and a two-way valve. 3.3.7 Motorized 3-way valve is an actuator composed of an electric actuator and a three-way valve. 3.4 The component of modular air handling unit3. 4.1 The unit functional section air handling section constitutes a modular air handling unit, which is a combined unit that can realize certain processing functions of air. 37 | | tt | 3.4.2.1 The supply fan section is a fan unit mainly used to overcome the resistance of the air supply path. 3.4.2.2 Return fan section The return fan section device is a fan unit mainly used to overcome the resistance of the return air and exhaust passages. 3.4.2.3 The exhaust fan section is a fan unit used to discharge air from the air conditioning system to the outside. 3.4.3 Filter section filter section
A prefabricated unit that installs an air filter in a combined air handling unit. 3.4.3.1 The roughing filter section is a prefabricated unit equipped with a coarse-effect air filter that mainly filters coarse dust particles with a particle size of 5um or more. 3.4.3.2 Medium efficiency air filter section The medium efficiency air filter section is a prefabricated unit equipped with an air filter with medium filtration efficiency for dust particles with a particle size of 3 to 10 μm. 3.4.3.3 High efficiency air filter section is a prefabricated unit that installs an air filter with a counting efficiency of 70% to 90% for laboratory atmospheric dust particles equal to or larger than 1 μm.
3. 4. 3.4 Sub-high effieiency particulate air filter section is installed to filter air with a counting efficiency of 95%~~99.9% for laboratory atmospheric dust equal to or greater than 0.5μm dust particles. prefabricated unit.
3.4.3.5 panel-type air filter panel-type air filter is a flat unit air filter that is often assembled in a herringbone installation in the filter section. 3.4.3.6 Automatic-roll air filter The rolled filter material is supported and tightened by the driving and driven shafts on opposite sides of the filter section, and part of its width is covered with the filter section. When the filter material accumulates dust and the resistance increases to a specified value, it will automatically roll from the unused side to the used side. The one that is wound in the up and down direction is called the vertical winding type, and the one that is wound in the left and right direction is called the horizontal winding type. 3.4.3.7 Automatic-cleaning air air filter is an air filter with a movable suction nozzle that automatically cleans dust accumulated on the filter material. 3.4.3.8 Bag-type air filter is an air filter in which the filter material is made into a bag shape. It is usually composed of multiple bags connected in parallel. When it is only a single bag, it is called a basket-type air filter. ).
3.4.3.9 folded media-type air filter The filter material is assembled into a pleated air filter using partitions or belts. 3. 4. 3. 10 Electrostatic filter The electrostatic preciptator is composed of components such as a corona electrode and a dust collector. Under the action of a high-voltage electric field, particles in the airflow are charged and adsorbed to the filter on the dust collector.
3.4.4 Water spray section spray sections spray chamber is a unit that uses water sprayed into mist and at different temperatures to directly contact the air to perform heating, humidification, cooling, drying and other processing processes or to perform washing functions.
3.4.4.1 spray nozzle
The component in the spray chamber that sprays water into mist. 3.4.4.2 Nozzle discharge pipe The spraying bank nozzle and its water supply pipe are called nozzle discharge pipe. 38
3
One or several belts are tightly connected to two wheels respectively installed on the motor and fan shafts, and are indirectly driven by friction.
3.2.4.4 belt wheel
The main component of the belt drive, the driven wheel installed on the fan impeller shaft, and the driving wheel installed on the motor shaft. 3.2.4.5 Guide rail rack rail
is used to adjust the relative position of the motor and the ventilator to tighten the belt. The base of the motor is placed on it. 3.3 Fan-coil component fan-coil component condensate drain pan3.3.1
A drain pan that receives condensate water.
3.3.2 Speed ??control switch speed control switch is a switch that changes the speed of the motor.
3.3.3 Thermostat thermostat
An automatic control device that operates according to temperature changes and is used to maintain the controlled object within a certain temperature range. 3.3.4 Temperature relay - a relay that operates when the temperature reaches a certain value. It is generally equipped with sensitive components such as bimetallic sheets or liquid temperature bulbs that can vaporize and expand.
3.3.5 solenoid valve solenoid valve
This valve uses an electromagnet as the power element, and uses the suction and release of the electromagnet to control the on-off state of small-diameter valves. 3.3.6 Electric two-way valve motorized 2-way valve is an actuator composed of an electric actuator and a two-way valve. 3.3.7 Motorized 3-way valve is an actuator composed of an electric actuator and a three-way valve. 3.4 The component of modular air handling unit3. 4.1 The unit functional section air handling section constitutes a modular air handling unit, which is a combined unit that can realize certain processing functions of air. 37 | | tt | 3.4.2.1 The supply fan section is a fan unit mainly used to overcome the resistance of the air supply path. 3.4.2.2 Return fan section The return fan section device is a fan unit mainly used to overcome the resistance of the return air and exhaust passages. 3.4.2.3 The exhaust fan section is a fan unit used to discharge air from the air conditioning system to the outside. 3.4.3 Filter section filter section
A prefabricated unit that installs an air filter in a combined air handling unit. 3.4.3.1 The roughing filter section is a prefabricated unit equipped with a coarse-effect air filter that mainly filters coarse dust particles with a particle size of 5um or more. 3.4.3.2 Medium efficiency air filter section The medium efficiency air filter section is a prefabricated unit equipped with an air filter with medium filtration efficiency for dust particles with a particle size of 3 to 10 μm. 3.4.3.3 High efficiency air filter section is a prefabricated unit that installs an air filter with a counting efficiency of 70% to 90% for laboratory atmospheric dust particles equal to or larger than 1 μm.
3. 4. 3.4 Sub-high effieiency particulate air filter section is installed to filter air with a counting efficiency of 95%~~99.9% for laboratory atmospheric dust equal to or greater than 0.5μm dust particles. prefabricated unit.
3.4.3.5 panel-type air filter panel-type air filter is a flat unit air filter that is often assembled in a herringbone installation in the filter section. 3.4.3.6 Automatic-roll air filter The rolled filter material is supported and tightened by the driving and driven shafts on opposite sides of the filter section, and part of its width is covered with the filter section. When the filter material accumulates dust and the resistance increases to a specified value, it will automatically roll from the unused side to the used side. The one that is wound up and down is called the vertical winding type, and the one that is wound left and right is called the horizontal winding type. 3.4.3.7 Automatic-cleaning air air filter is an air filter with a movable suction nozzle that automatically cleans dust accumulated on the filter material. 3.4.3.8 Bag-type air filter is an air filter in which the filter material is made into a bag shape. It is usually composed of multiple bags connected in parallel. When it is only a single bag, it is called a basket-type air filter. ).
3.4.3.9 folded media-type air filter The filter material is assembled into a pleated air filter using partitions or belts. 3. 4. 3. 10 Electrostatic filter The electrostatic preciptator is composed of components such as a corona electrode and a dust collector. Under the action of a high-voltage electric field, particles in the airflow are charged and adsorbed to the filter on the dust collector.
3.4.4 Water spray section spray sections spray chamber is a unit that uses water sprayed into mist and at different temperatures to directly contact the air to perform heating, humidification, cooling, drying and other processing processes or to perform washing functions.
3.4.4.1 spray nozzle
The component in the spray chamber that sprays water into mist. 3.4.4.2 Nozzle discharge pipe The spraying bank nozzle and its water supply pipe are called nozzle discharge pipe. 38
3. The exhaust fan section is a fan unit used to discharge air from the air conditioning system to the outside. 3.4.3 Filter section filter section
A prefabricated unit that installs an air filter in a combined air handling unit. 3.4.3.1 The roughing filter section is a prefabricated unit equipped with a coarse-effect air filter that mainly filters coarse dust particles with a particle size of 5um or more. 3.4.3.2 Medium efficiency air filter section The medium efficiency air filter section is a prefabricated unit equipped with an air filter with medium filtration efficiency for dust particles with a particle size of 3 to 10 μm. 3.4.3.3 High efficiency air filter section is a prefabricated unit that installs an air filter with a counting efficiency of 70% to 90% for laboratory atmospheric dust particles equal to or larger than 1 μm.
3. 4. 3.4 Sub-high effieiency particulate air filter section is installed to filter air with a counting efficiency of 95%~~99.9% for laboratory atmospheric dust equal to or greater than 0.5μm dust particles. prefabricated unit.
3.4.3.5 panel-type air filter panel-type air filter is a flat unit air filter that is often assembled in a herringbone installation in the filter section. 3.4.3.6 Automatic-roll air filter The rolled filter material is supported and tightened by the driving and driven shafts on opposite sides of the filter section, and part of its width is covered with the filter section. When the filter material accumulates dust and the resistance increases to a specified value, it will automatically roll from the u
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.