Some standard content:
1s 91. 140. 30
Construction industry standard of the People's Republic of China JG/F 20—1999
Method of testing for rating air distributor performance1999-06-04 Issued
Issued by the Ministry of Construction of the People's Republic of China
Implemented on 1999-06-04
JGT 201999
! General provisions
2 Test measuring table
3 Requirements for failure of service
4 Requirements for performance test of air jet
5 Test results of air outlet performance
Appendix A Main methods for measuring air flow rate Nozzle transfer (supplement) Appendix H Total pressure and dynamic pressure measurement table (supplement) 76
JGT201999
Light belt with the same family insertion transmission Bureau of technical supervision and quality supervision of the relevant professional standards and the national standard for the conversion of combustion frequency and frequency of release of medicinal liquor (Quality and Technical Supervision Bureau Standard Letter (1998) No. 21G] Installation requirements, the Ministry of Political and Legal Affairs approved the national standard of the Ministry of Construction under the jurisdiction of the State Administration of Safety and Construction in 1992 The standard was converted into an industry standard item and the product standard item approved and issued by the Ministry of Construction before 1S52 was reorganized. After the review and arbitration, the Ministry of Construction issued the standard (1939) No. 15 document on the announcement of the results of the standard cleanup and rectification of the three pairs of G15070975 air distributor performance test standards. The new number is JG/T26.-1999. In order to facilitate the implementation of the standard, the original standard seal, header, and card bottom line expressions are correspondingly improved, and this explanation is added and reprinted. The original standard version is abolished at the same time. The People's Republic of China Construction Industry Standard Air Distributor Performance Test Method
Methud aP leslingfnr ralingnirlistrlhutaperfnrnanreJG/T20—1999
This standard is equivalent to the international standard 152191994 (). Air dynamic test clinical standard for air distribution agent, air expansion and air terminal installation test room 3
1 General
1.1 Main provisions
This standard specifies the test method for the performance of air storage device inflatable therapy, which includes the type of test device, its accuracy requirements, test force method and test data calculation method adopted, etc. 1.2 Applicable scope
1.? .! This standard is applicable to the aerodynamic performance test of the supply and return air of the customer. 1.2.2 This standard applies to isothermal conditions [i.e., the supply and return air temperature are equal or the temperature difference between the two is not large], and the aerodynamic performance test is carried out, and no technical requirements are made for non-isotropic flow test. 1.2.3 Other types of low-use products can be used in this standard. 1.3 Test items
1. 3.1 Supply and return air are measured.
1.3.2 Under the same wind, the pressure loss and static generation of the different dishes will be large. According to the needs, two items can be selected at the same time. 1.3.3 Supply air jet characteristics test can be selected according to the wind pattern. The following part or part of the day or enterprise items can be measured: flow envelope:
radiation (when the flow pattern is in the shape of a jet, it is called the whole line): upper distance:
expansion width.
1.4 Definition of terms
1.4.1 Air distributor (also called outlet type in this article
1.4.1.1 outlet) refers to the terminal component of the air supply system (or conditioning equipment) that delivers air to the room, such as nozzles, vents, chain fans, swirl outlets, etc. 1.4.1.2 Return air vent (imlet: refers to a valve component in the air supply system (or air conditioning system) that discharges the air from the room, such as micro-flow outlet, strip air vent. Net air vent difference, 1.4.1.3 Air vent combination device, refers to the terminal combination device of the air supply system that delivers air into the room, such as variable air volume air vent, high-speed air vent and induction air vent.
1.4.2 Geometric characteristics of air distributors
1.4.2.1 Product series: refers to a group of air vents with similar configurations and geometric modules that have the same function (such as this air vent, return air vent, etc.).
1.4.2.2 Nominal size refers to the nominal size representing the purchase specification, for example, the centimeter of the air filter is the dryer size. 1. 4.2.? Length-to-width ratio refers to the ratio of the larger side to the smaller side of a rectangular air distributor. 1.4.2.4 Blade ratio: refers to the ratio of the length of the blade to the length of the blade. Approved by the Ministry of Construction of the People's Republic of China in 1999-06-1999-05-J4. 1.4.2.5 Net area ratio: the ratio of the net area to the gross area, a "gross area", refers to the gross area formed by the inner edge of the air distributor at the entrance, b, surface area: refers to the sum of the cross-sectional areas of all the holes at the outlet of the air distributor, 1.4.2.6 surface only (1), used to illustrate the effective area of the air flow out of the air distributor. A. The value is the air flow and gas construction factor (the total area) obtained by the specified instrument and the specified method, 1.4 .3 Air expansion coefficient
1.4.3.1 Air velocity information: the average velocity of the air flow at the central point of the old air flow rate. 1.4.3.2 End-of-flow rate: refers to the allowable expansion rate specified at the end of the combined air filter from the air supply outlet. Generally, the end-of-flow rate of .5rm/ is used to determine the range of the short-flow.
1.4.3.3 Air flow disk: refers to the air entering or leaving the air distributor within a unit space. 1.4.3.4 Flow shadow surface, used to select the interface formed by the constant velocity points on the upstream filter pattern. The air velocity at this interface is equal to the specified allowable velocity value, generally .5m/, Figure 1X [Appendix 2
FR Morse type
also requires an installation
[d] square suction air flow sensor (b) Slow type (e) Smoke type or sparse type (e) Smoke type or sparse type (e) Smoke type (e) Smoke type 1.43-5 Radiation: refers to the height of the center of the air outlet when the air flow drops to 0.5m/s, which is the maximum vertical distance between the jet axis and the center line of the air outlet, see Figure 1. 1.4.3.6 Drop: When the axis of the air flow drops to 0.5m/s, the maximum vertical distance between the jet axis and the center line of the air outlet. 14.3.7 Drop refers to the vertical distance between the air flow center axis and the air outlet center axis on the envelope surface of this type, see Figure 1.1.38 Drop refers to the distance between the highest horizontal distance on the air flow envelope and the air outlet center axis, see Figure 11. 4.3.9
Expansion width: refers to the distance between two planes tangent to the flow pattern envelope multiplied by the average temperature of the air supply plane. See Figure 1.
1.4.310 Supply air temperature difference: refers to the difference between the supply air temperature and the average temperature of the working air. 1.4.3.11 Envelope air temperature difference: refers to the difference between the reheating humidity and the advection degree of the working area air. 2
JC/T 20-1999
7.4.4 Standard state narrow air refers to air with a temperature of 20°C, a density of 1.2kg/m3, an atmospheric pressure of 10!325Fa (1013.25bar) and a relative humidity of 65%.
1.5 Symbols
The following terms are used in the standard center, as shown in Table 1. 1
1 and take
the surface of the test room (printed with the nominal size of the air outlet) for the figure? A.1
Width of the test room with the same effective equipment
Surface measurement grid (A yuan)
The force diameter (44/circumference!
The height of the test room with the same or the same equipment
The length of the test room with the same equipment
Absolute static repulsion
Atmospheric opening
Rate for the whole medical
Golden medical ()
Static loss
Total pressure loss
Pressure safety (for a positive device)
Average cancer
Speed four
Open air supply I×Maximum speed on the mouse|| tt||Diffusion width
Descent distance or rise distance
Product resistance coefficient (force loss coefficient) Super mechanical quality
2 Test measurement table
2.1 Air temperature measurement
Required in 51 units
ML-\T-
2.1.1 Air temperature measurement should be carried out using a calibrated water-based thermometer, resistance thermometer, thermoelectric or other type of thermometer. 2.1.2 The minimum grid of humidity should not be greater than ℃.5. 2.1.3 The thermometer must be accurate and its accuracy should not be less than _0. Natural heart. 2.2 Air pressure measurement
2.2.1. The air force measurement in the pipeline should use a sugar-type dynamometer such as a straight pressure gauge. New pressure gauge and micro pressure certificate (tube type and compensation type>.
2.2.1.1 The scale of the dynamometer is as listed in Table 2: 3
25--500
5 Take!
JC/120—999
2.2.1.2 Pressure as the gauge must be frequently calibrated: its alarm will not be lower than the value listed in Table 3. Heat E
1.25--25 ()
25 pressure gauge or micrometer>
2.2. :. The minimum value of the empty volume should be:
n. The tube pressure gauge is used as P,
the smallest centimeter will be
2-2.2 The test environment is large and the measurement is adapted to the use of an accurate mercury barometer of not less than 11. 2.2.3 Net pressure, dynamic pressure and total pressure range measurement
2.2.3.1 Pressure drop measurement On the duct wall of the measuring surface, 4 small pressure holes (diameter of ~3m four. Excellent light use 1. day, the requirements are on the elephant) are connected to form a brush ring, and the static pressure value measured is not measured according to the level and the whole pressure value, which makes the standard support connection. 2.2.3.2 The dynamic pressure shall be measured by the standard pitot tube specified in 2.2.1. 2.2.3.3 The standard pitot tube shall be used for all tests and the pressure gauge specified in 2.2-1 shall be used for the measurement. 2.2.3.4 The requirements of the supplementary material of Appendix H of the standard pitot tube are as follows: 2.3.1 The air velocity measurement shall include the actual air flow in the duct, the air velocity at the return air outlet and the air flow rate in the air chamber: When the air velocity in the duct exceeds 35, the following measurements shall be made: The air velocity at the entrance and the air flow velocity in the room - digital air velocity measurement personnel
2.3.2 Please measure the low speed data with the meter, the low speed measurement range is 0.4~5. If the plan needs to expand the range, the meter should be selected according to the program.
2.3.2.1 The maximum size of the probe should not exceed 15n1m: when the measurement deviates from the airflow direction by more than 15\, the value change within the range should not exceed 5.
2.32.2 The low speed measurement of this meter is the product speed, and the average speed value is expressed by reading. The meter must be The minimum standard is 7.5 for low-speed measurement.
2.3.3 The air supply velocity is % of the single selected instrument. The detailed measurement accuracy should be 12m/5. If you want to expand the measurement range and use other instruments with corresponding ranges, other requirements should comply with the provisions of 2.3.1: 2.3.4 If a pointer meter is selected for low-speed and high-speed measurement, its scale should be marked with two scales, namely the low-speed scale and the direction scale, and the scale ratio is required to be more than 1. 2.4 Air flow items
2.4.1 The standard air flow meter selected for air flow measurement must meet the requirements listed in the table. 2.4.2 The actual gas volume flow rate at the tuyere shall be measured with the following requirements: 2. The air flow meter shall be equipped with a slow nozzle, and the minimum smoke velocity limit shall not exceed 35m/s (see A).
0.007-0.07m/s
0.007m/s or less, F
JG/T201999
n. 9 :*/s
2.4.2.2 When other air flow measurement methods are used, the measurement standards in 2.4.1 must be followed. 2.4.2.3 The flow meter must be recalibrated regularly, and the period must not exceed 2 years. It can be done in one of the following ways: For all flow meters that do not require calibration, a calibration check is performed; For instruments that do not require calibration, a calibration is performed using the following methods except for some other methods: b
For the actual gas used, the source of the gas is fully calibrated. The best part of the scale is recalibrated. 2.4.3 The change in the air volume caused by the influence of air content on air density is very small and can be ignored. It is not necessary to correct the moisture content by using the density.
3 Pressure overrun test requirements
3. 1. Pressure loss test of air outlet
3.1. For a product system, at least one specification should be tested, and each specification should have at least 4 air volumes. 3.1.2 The pressure loss test of air outlet should consist of at least one fan, flow control device, air flow measurement device and standard test section. The test should be carried out under isothermal conditions. 3.1.3 For each air outlet, when the output loss or age is simulated, the fan directly connected to it should be Use standard test pipe. If the air supply short pipe, air flow adjustment valve or flow guide vane are part of the exhaust port, they should be connected to the standard test pipe as a whole during installation. 3.1. The air supply port should be installed in the first test device (Figure 2) or the second test device (Figure 4) for testing. If the air supply is equipped with a windshield, when conducting the power loss test, find out the position or opening degree of the windshield selected, and measure the air flow and the blade before the test. With the slave, charging temperature measurement directly
quantity note
intelligent pressure ring
(a) standard test set
to within the professional and
Qi medicine multi-effect air quality and Ai pen cream
long evening river = 1.m
minimum 14
() static positive joint
Yang 2 air supply outlet treatment fingertip test the first device (standard test Jun kidney) to send the first test device can be used in two ways to determine the air supply outlet There are two methods for testing the air supply outlet: one is the static pressure measurement method (see 3.1.5) and the other is the total pressure measurement method (see 3.1-5). The second test method adopts the static pressure measurement method (see 3.1.5). 3-1-5 The static pressure measurement method for the air supply outlet 3.1.5.1 The air supply outlet to be tested shall be installed on a standard test piece with a cross-sectional size equal to the nominal size of the air supply outlet. The test section shall be straight and contain a rectifier. The distance of the test air supply from the rectifier to the test position shall be at least 3 times the area of the air supply (R).
3.1.5.2 The test air supply is arranged as shown in Figure 2. The measuring surface shall be located at 1.5 times the diameter of the air duct upstream of the air supply port (,). The static auxiliary points shall be taken on two opposite diameters of the measuring surface. The selected measuring points shall be used to measure the pressure at the center of the pressure field. 5
JC/T.201999
31.5.3 The total pressure of the measured water is equal to the sum of the static value of the plate and the dynamic pressure obtained by the air flow meter 3. The total pressure obtained is the total pressure of the standard state air. 31.5.4 When testing a type of air outlet, the static pressure measurement value shall be recorded at least 4 minutes of air flow rate. The flow rate and pipe pressure measurement shall be carried out at the same time. 3.1.6 The total pressure measurement method for the type of air outlet is used for the test device. 3.1.6-1 The position of the test device and the test surface is the same as that described in Figures 2 and 3.1.5. At least E measuring points on the measurement surface shall be used to measure the total pressure using the Pitot algorithm. The measurement points can be referred to in Figure 3: The total pressure loss shall be the arithmetic mean of the three measured values and then corrected to the total pressure when the standard air is present. 3.1.6.2 When testing a type of air outlet, at least 1 positive pressure value shall be recorded at the same time as the water flow rate and the static pressure loss value of the air outlet are passed. 3.1.6 The static pressure measurement method for the type of air outlet is used for the test device. 3.1.7, 1 test about also should be installed in the test as shown in the two 4, the starting size of the pipe is less than the nominal size of the small outlet, the total length of the short pipe and the diameter of the whole is 0.15m. The test tube should have a conical inlet. 0.4
1.01o++b?
3 the total pressure measurement method Hua bone (",\ is the measuring point) is the small D.9
R outlet emit
hot air distribution equipment
and variable square
volume Sul
1D reduce at least a.15ml
average reduction of the whole
smoke this network daily force arch fire test second device (bad test Note: The temperature (W) and height (H) are determined by A = WH31-7.2 The distance between the measuring hole and the air outlet is at least 0.05m (see Figure 4 for details). The measured static pressure should be regarded as the total pressure and converted into the non-standard value of the standard state air. 3.1.3 When testing a specification, the static pressure measurement values under four air volume should be recorded. The volume and static pressure measurement should be carried out at the same time. 3.1.8 Calculation of the value 3.7.8.1 All small measurements should be based on the standard state air supply: that is, the pressure (pressure or standard pressure) multiplied by the standard state air density () and the actual air density () on the demand function. The standard state air density is 1.2k/, and draw the total pressure or static pressure of the measured scene and the air flow rate or the total pressure (P,) or static pressure (P,) air flow rate () relationship diagram
3.1.B.2 The product resistance coefficient (6) shall be calculated according to formula (1) and formula (2): The static pressure measurement of the first type of air outlet reaches the total pressure measurement of the third type of air outlet or the static pressure measurement method of the third type of air outlet,, and P—static pressure and total pressure value, PaP,-dynamic pressure, ParF/
. Among them, and are obtained under alternate test conditions. For each product series, the values of various sections are sorted out from the test data. 3.2 Return air outlet pressure loss test
3.2.1 For a product series, at least 4 specifications should be used as representatives for testing, and each specification should be tested under at least 4 air flow rates. 3.2.2 For individual air vents, the air ducts directly connected to them during the pressure loss test should be connected to the standard test section. For example, the return air short duct, air flow control door, etc. are components of the entire return air vent and should be connected to the standard test section as a whole during installation. 32.3 The return air vent pressure loss test device should consist of at least one fan, flow control panel, indoor air flow measurement device and standard test section, and should be tested under isothermal conditions. 1.50 micrometers are used for the return air vent pressure loss test. 3.2.4 The return air vent pressure loss test device (standard test device) shown in Figure 5 can be used to measure the return air vent on the simulated drop or vibration of the first test device (hereinafter referred to as the wall electrode). The second test device shown in Figure 6 can also be used. The first test device can be used to determine the pressure loss in two ways, one is the static pressure measurement method (see 3.2.> and the other is the total pressure measurement method (3.2.6). The second test device adopts the static pressure measurement method (see 3.2.7). 3.2.4.1 Requirements for the wall panel of the return air vent. For the return air vent of the shape and shape or rectangle, the distance between the wall panel boundary and each side of the return air vent shall be at least 2 times the diameter of the test material (). For the return air vent of the shape and shape or rectangle, the distance between the wall panel boundary and each side of the return air vent shall be two times the diameter of each side. For the special vent (such as the windshield), the wall panel can be omitted as long as it does not affect the air velocity distribution of the four vents.
3-2.4.2 For the vent equipped with the air flow regulating valve, the selected position or opening degree of the vent shall be indicated when the pressure loss test is carried out.
3.2.5 The return air pressure is a common method for static pressure resistance test. 3.2.5.1 The test area should be installed on a standard test pipe (Figure 5). The test area size is equal to the nominal size of the air outlet. The standard test pipe contains an entire return air volume. The installation distance of the return air of the test is at least 7 meters. 3.2.5.2 The arrangement of the test air outlet shall be as shown in Figure 5. The static pressure measurement point shall be located downstream of the test air outlet. At a distance of not less than 1D below, the static pressure measurement point shall be moved along the center line of the test air outlet to control the static pressure (relative value) until the displacement is minimized. The measured pressure is the return air pressure value. For another pressure method, the measuring surface shall be located at 6 places downstream of the test air outlet. The static pressure measurement points shall be located at two equal vertical pipe diameters on the surface. The difference between the maximum and minimum values of the measured pressure shall not exceed 10% of the average value of the new pressure. 3.2.5.3 For a test air outlet of a certain specification, the minimum pressure measurement points shall be recorded. The static pressure measurement value and static pressure measurement under the air conditioner are carried out simultaneously. 3-2.5.4 The forward pressure loss can be corrected by formula (3): H=PL/DP, where: F is the static pressure loss of the air outlet P, the forward pressure measurement value, FaF is the distance from the previous air outlet to the house, the measurement position, P is the hydraulic diameter of the standard test pipe, P is the average dynamic pressure in the standard test pipe, P is equal to 1 and is obtained under the same conditions: A is the standard test pipe fault detection coefficient, which can be taken as 0.2?. 53 2
3.2.5.5 The sum of the total pressure obtained by the total output and the air flow rate calculated during the test, also referred to as the receiving pressure, shall also be taken as the pressure value when the air is in a normal state. 3.2.6 Total pressure measurement method for return air outlet pressure loss test 3.2.6.1 Test device The small measurement area shown in Figure 3 and the cabinet network shown in 7.2.5.2 shall be located on the measurement surface. At least 5 measurement points shall be set on the measurement surface (see Figure) to carry out total pressure measurement. The arithmetic half of the 5 total pressure values measured at the total output loss level shall be taken as the average. At the 5 measurement points on the measurement surface [ : Net pressure measurement can also be carried out, and the vertical difference of static pressure should be more than 20% of the average low of the measured area:
-A standard test return air outlet, the total pressure measurement value under a certain room air flow rate should be remembered, the flow mother and total pressure measurement are the same as 3.2.6 2
through the line,
3-2.6.3 Return air outlet total pressure loss formula (4) is used to obtain: Pca/DF
The derived pressure, the reference is the total pressure value of the standard air, 32.7 The static pressure measurement method of the air outlet pressure loss test device TH City C.15in
Minimum om
Static year
Total height of the old machine
Uniform shell
Test dyeing short-term
National wind mountain release board
Figure 5 Return air pressure photography The first type of test (standard test tube) FP
Note that the W and BW must comply with /AA-KUwwW.bzxz.Net
3.2-7.1. The same air outlet for the test should be installed in the test short tube as shown in Figure 6. The short cross-sectional size is the public size of air 1. The square length is equal to the equivalent true diameter of the tube or the total length is at least 0.1. For the return air outlet, the W size in Figure 6 is the return air pressure. The static pressure hole on the wall should be measured. The auxiliary hole ratio is at least 0.05 from the inner surface of the air outlet installation process. 8
JG/T 20 -1999
3.27.2 Two kinds of existing specifications of [air vents, at least the value obtained in the new room system panel design record panel value is the minimum value of the attached Sichuan specification for the full ten-speed rapid completion of your car as the standard state of your car, 3.2.8 Calculation of return air value
3.2.8.1 After all the measured pressure knife values are corrected to the standard state of air, the total pressure or ambient air construction test or relationship diagram is made to determine the return air outlet's load
J2H local south coefficient () according to this network measurement legislation, the self-generation (~ formula (designer: return air first test device application layer ratio method:
room wind first evaluation test equipment intelligent static pressure and reach
For each product system and, the test teaching data can also be used to figure out various specifications of the value. 3.311m area tooth 4. Determination
3.3.1 Wind volume test sequence is to measure the volume of air flow and wind flow balance of the system in the province Baochuan ten wind system on-site test. 3.3.1.1 The area of the return air 11 is the same as the test sheet of the sheet force loss test. The volume flow of the air can be measured on the installation.
3.3.1.? The reason is that under the given temperature, at the position specified in the wind speed specification, the technical average of the air velocity is obtained. The measuring point should be no less than the point
. The wind speed of the non-starting blade during the test must be 3313 meters, divided by the net result of the previous product value under the ejected airflow
3.3.2 For a certain specification of air outlet, at least 4 kinds of traction methods should be carried out, or the minimum value can be obtained.4,elk3.3.3 The A value of a certain specification of air outlet should be the calculated average of several single values of the tested air. The difference between a single air supply and the average air supply is different.
4 Requirements for the test of air supply jet characteristics
For an air supply, the air supply system characteristics shall be determined as soon as possible under the specified test environment, such as the rapid and violent air supply system, and the flow characteristics shall be determined as follows: (X), the dispersion width () and the drop distance or rise distance (2). For non-isothermal jets, the difference must also be measured. For air supply outlets with adjustable flow types, the jet characteristics under high or different types shall be measured. 4. The test room
The air supply jet characteristics test shall be conducted in a closed space! The test room shall be the "test room" 4.7.: The test room shall be full of jets in a self-returning state, that is, the surrounding conditions of the room shall not affect the dispersion of the jets. Its minimum size: the room should not be less than
b. room length (should not be less than 7.
room width ()) the bottom of the turn,
1.1.? All doors, windows, lighting equipment in the room should be almost in contact with the surface on which they are installed, and there should be no obstacles on the jet flow. The whole room should be tested and guaranteed: 4.13 as long as the return air in the same place affects the delivery, the jet can be installed at any position, but the return air can be installed at a low position, the room air Di a) or static pressure (P,) and air flow rate () relationship diagram
3.1.B.2 The product resistance coefficient (6) shall be calculated according to formula (1) and formula (2): The static pressure of the first type of outlet is measured at the total pressure of the second type of outlet or the static pressure of the third type of outlet is measured at the total pressure of the third type of outlet. In the formula, P and P are the static pressure and total pressure values, PaP, and dynamic pressure, ParF/
. Among them, and are obtained under the condition of phase test. For each product series, the values of various sections are sorted out from the test data. 3.2 Return air outlet pressure loss test
3.2.1 For a product series, at least 4 specifications shall be used as representatives for testing, and each specification shall be tested under at least 4 air flow rates.
3.2.2 For each air outlet, when conducting a pressure loss test, the fan directly connected to it shall be tested according to the state standard. For example, the return air short duct and the air flow regulating door are components of the entire return air outlet. When installed, they should be connected to the standard test pipe as a whole. 32.3 The return air outlet pressure loss test device should consist of at least one fan, a flow control panel, an indoor air flow measurement device and a standard test section, and should be tested under isothermal conditions. 1.50 micrometers are used for the return air outlet pressure loss test. 5 Return air outlet pressure loss test device (standard test) 3.2.4 The return air outlet pressure loss test device is measured on the simulated drop or vibration of the first test device shown in Figure 5 (hereinafter referred to as the wall pole). The second test device shown in Figure 6 can also be used. The first test device can be used to determine the pressure loss in two ways, one is the static pressure measurement method (see 3.2.> and the other is the total pressure measurement method (3.2.6). The second test device adopts the static pressure measurement method (see 3.2.7). 3.2.4.1 Requirements for the wall panel of the return air vent. For the return air vent of the shape and shape or rectangle, the distance between the wall panel boundary and each side of the return air vent shall be at least 2 times the diameter of the test material (). For the return air vent of the shape and shape or rectangle, the distance between the wall panel boundary and each side of the return air vent shall be two times the diameter of each side. For the special vent (such as the windshield), the wall panel can be omitted as long as it does not affect the air velocity distribution of the four vents.
3-2.4.2 For the vent equipped with the air flow regulating valve, the selected position or opening degree of the vent shall be indicated when the pressure loss test is carried out.
3.2.5 The return air pressure is a common method for static pressure resistance test. 3.2.5.1 The test area should be installed on a standard test pipe (Figure 5). The test area size is equal to the nominal size of the air outlet. The standard test pipe contains an entire return air volume. The installation distance of the return air of the test is at least 7 meters. 3.2.5.2 The arrangement of the test air outlet shall be as shown in Figure 5. The static pressure measurement point shall be located downstream of the test air outlet. At a distance of not less than 1D below, the static pressure measurement point shall be moved along the center line of the test air outlet to control the static pressure (relative value) until the displacement is minimized. The measured pressure is the return air pressure value. For another pressure method, the measuring surface shall be located at 6 places downstream of the test air outlet. The static pressure measurement points shall be located at two equal vertical pipe diameters on the surface. The difference between the maximum and minimum values of the measured pressure shall not exceed 10% of the average value of the new pressure. 3.2.5.3 For a test air outlet of a certain specification, the minimum pressure measurement points shall be recorded. The static pressure measurement value and static pressure measurement under the air conditioner are carried out simultaneously. 3-2.5.4 The forward pressure loss can be corrected by formula (3): H=PL/DP, where: F is the static pressure loss of the air outlet P, the forward pressure measurement value, FaF is the distance from the previous air outlet to the house, the measurement position, P is the hydraulic diameter of the standard test pipe, P is the average dynamic pressure in the standard test pipe, P is equal to 1 and is obtained under the same conditions: A is the standard test pipe fault detection coefficient, which can be taken as 0.2?. 53 2
3.2.5.5 The sum of the total pressure obtained by the total output and the air flow rate calculated during the test, also referred to as the receiving pressure, shall also be taken as the pressure value when the air is in a normal state. 3.2.6 Total pressure measurement method for return air outlet pressure loss test 3.2.6.1 Test device The small measurement area shown in Figure 3 and the cabinet network shown in 7.2.5.2 shall be located on the measurement surface. At least 5 measurement points shall be set on the measurement surface (see Figure) to carry out total pressure measurement. The arithmetic half of the 5 total pressure values measured at the total output loss level shall be taken as the average. At the 5 measurement points on the measurement surface [ : Net pressure measurement can also be carried out, and the vertical difference of static pressure should be more than 20% of the average low of the measured area:
-A standard test return air outlet, the total pressure measurement value under a certain room air flow rate should be remembered, the flow mother and total pressure measurement are the same as 3.2.6 2
through the line,
3-2.6.3 Return air outlet total pressure loss formula (4) is used to obtain: Pca/DF
The derived pressure, the reference is the total pressure value of the standard air, 32.7 The static pressure measurement method of the air outlet pressure loss test device TH City C.15in
Minimum om
Static year
Total height of the old machine
Uniform shell
Test dyeing short-term
National wind mountain release board
Figure 5 Return air pressure photography The first type of test (standard test tube) FP
Note that the W and BW must comply with /AA-KU
3.2-7.1. The same air outlet for the test should be installed in the test short tube as shown in Figure 6. The short cross-sectional size is the public size of air 1. The square length is equal to the equivalent true diameter of the tube or the total length is at least 0.1. For the return air outlet, the W size in Figure 6 is the return air pressure. The static pressure hole on the wall should be measured. The auxiliary hole ratio is at least 0.05 from the inner surface of the air outlet installation process. 8
JG/T 20 -1999
3.27.2 Two kinds of existing specifications of [air vents, at least the value obtained in the new room system panel design record panel value is the minimum value of the attached Sichuan specification for the full ten-speed rapid completion of your car as the standard state of your car, 3.2.8 Calculation of return air value
3.2.8.1 After all the measured pressure knife values are corrected to the standard state of air, the total pressure or ambient air construction test or relationship diagram is made to determine the return air outlet's load
J2H local south coefficient () according to this network measurement legislation, the self-generation (~ formula (designer: return air first test device application layer ratio method:
room wind first evaluation test equipment intelligent static pressure and reach
For each product system and, the test teaching data can also be used to figure out various specifications of the value. 3.311m area tooth 4. Determination
3.3.1 Wind volume test sequence is to measure the volume of air flow and wind flow balance of the system in the province Baochuan ten wind system on-site test. 3.3.1.1 The area of the return air 11 is the same as the test sheet of the sheet force loss test. The volume flow of the air can be measured on the installation.
3.3.1.? The reason is that under the given temperature, at the position specified in the wind speed specification, the technical average of the air velocity is obtained. The measuring point should be no less than the point
. The wind speed of the non-starting blade during the test must be 3313 meters, divided by the net result of the previous product value under the ejected airflow
3.3.2 For a certain specification of air outlet, at least 4 kinds of traction methods should be carried out, or the minimum value can be obtained.4,elk3.3.3 The A value of a certain specification of air outlet should be the calculated average of several single values of the tested air. The difference between a single and average air supply is not new.
4 Requirements for the test of air supply jet characteristics
For an air supply, the air supply system characteristics shall be determined as soon as possible under the specified test environment, such as the rapid and violent air supply system, and the flow characteristics shall be measured as follows: (X), the dispersion width () and the drop distance or rise distance (2). For non-isothermal jets, the difference must also be measured. For air supply outlets with adjustable flow types, the jet characteristics under high or different types shall be measured. 4. The test room
The air supply jet characteristics test shall be conducted in a closed space! The test room shall be the "test room" 4.7.: The test room shall be full of jets in a self-returning state, that is, the surrounding conditions of the room shall not affect the dispersion of the jets. Its minimum size: the room should not be less than
b. room length (should not be less than 7.
room width ()) the bottom of the turn,
1.1.? All doors, windows, lighting equipment in the room should be almost in contact with the surface on which they are installed, and there should be no obstacles on the jet flow. The whole room should be tested and guaranteed: 4.13 as long as the return air in the same place affects the delivery, the jet can be installed at any position, but the return air can be installed at a low position, the room air Di a) or static pressure (P,) and air flow rate () relationship diagram
3.1.B.2 The product resistance coefficient (6) shall be calculated according to formula (1) and formula (2): The static pressure of the first type of outlet is measured at the total pressure of the second type of outlet or the static pressure of the third type of outlet is measured at the total pressure of the third type of outlet. In the formula, P and P are the static pressure and total pressure values, PaP, and dynamic pressure, ParF/
. Among them, and are obtained under the condition of phase test. For each product series, the values of various sections are sorted out from the test data. 3.2 Return air outlet pressure loss test
3.2.1 For a product series, at least 4 specifications shall be used as representatives for testing, and each specification shall be tested under at least 4 air flow rates.
3.2.2 For each air outlet, when conducting a pressure loss test, the fan directly connected to it shall be tested according to the state standard. For example, the return air short duct and the air flow regulating door are components of the entire return air outlet. When installed, they should be connected to the standard test pipe as a whole. 32.3 The return air outlet pressure loss test device should consist of at least one fan, a flow control panel, an indoor air flow measurement device and a standard test section, and should be tested under isothermal conditions. 1.50 micrometers are used for the return air outlet pressure loss test. 5 Return air outlet pressure loss test device (standard test) 3.2.4 The return air outlet pressure loss test device is measured on the simulated drop or vibration of the first test device shown in Figure 5 (hereinafter referred to as the wall pole). The second test device shown in Figure 6 can also be used. The first test device can be used to determine the pressure loss in two ways, one is the static pressure measurement method (see 3.2.> and the other is the total pressure measurement method (3.2.6). The second test device adopts the static pressure measurement method (see 3.2.7). 3.2.4.1 Requirements for the wall panel of the return air vent. For the return air vent of the shape and shape or rectangle, the distance between the wall panel boundary and each side of the return air vent shall be at least 2 times the diameter of the test material (). For the return air vent of the shape and shape or rectangle, the distance between the wall panel boundary and each side of the return air vent shall be two times the diameter of each side. For the special vent (such as the windshield), the wall panel can be omitted as long as it does not affect the air velocity distribution of the four vents.
3-2.4.2 For the vent equipped with the air flow regulating valve, the selected position or opening degree of the vent shall be indicated when the pressure loss test is carried out.
3.2.5 The return air pressure is a common method for static pressure resistance test. 3.2.5.1 The test area should be installed on a standard test pipe (Figure 5). The test area size is equal to the nominal size of the air outlet. The standard test pipe contains an entire return air volume. The installation distance of the return air of the test is at least 7 meters. 3.2.5.2 The arrangement of the test air outlet shall be as shown in Figure 5. The static pressure measurement point shall be located downstream of the test air outlet. At a distance of not less than 1D below, the static pressure measurement point shall be moved along the center line of the test air outlet to control the static pressure (relative value) until the displacement is minimized. The measured pressure is the return air pressure value. For another pressure method, the measuring surface shall be located at 6 places downstream of the test air outlet. The static pressure measurement points shall be located at two equal vertical pipe diameters on the surface. The difference between the maximum and minimum values of the measured pressure shall not exceed 10% of the average value of the new pressure. 3.2.5.3 For a test air outlet of a certain specification, the minimum pressure measurement points shall be recorded. The static pressure measurement value and static pressure measurement under the air conditioner are carried out simultaneously. 3-2.5.4 The forward pressure loss can be corrected by formula (3): H=PL/DP, where: F is the static pressure loss of the air outlet P, the forward pressure measurement value, FaF is the distance from the previous air outlet to the house, the measurement position, P is the hydraulic diameter of the standard test pipe, P is the average dynamic pressure in the standard test pipe, P is equal to 1 and is obtained under the same conditions: A is the standard test pipe fault detection coefficient, which can be taken as 0.2?. 53 2
3.2.5.5 The sum of the total pressure obtained by the total output and the air flow rate calculated during the test, also referred to as the receiving pressure, shall also be taken as the pressure value when the air is in a normal state. 3.2.6 Total pressure measurement method for return air outlet pressure loss test 3.2.6.1 Test device The small measurement area shown in Figure 3 and the cabinet network shown in 7.2.5.2 shall be located on the measurement surface. At least 5 measurement points shall be set on the measurement surface (see Figure) to carry out total pressure measurement. The arithmetic half of the 5 total pressure values measured at the total output loss level shall be taken as the average. At the 5 measurement points on the measurement surface [ : Net pressure measurement can also be carried out, and the vertical difference of static pressure should be more than 20% of the average low of the measured area:
-A standard test return air outlet, the total pressure measurement value under a certain room air flow rate should be remembered, the flow mother and total pressure measurement are the same as 3.2.6 2
through the line,
3-2.6.3 Return air outlet total pressure loss formula (4) is used to obtain: Pca/DF
The derived pressure, the reference is the total pressure value of the standard air, 32.7 The static pressure measurement method of the air outlet pressure loss test device TH City C.15in
Minimum om
Static year
Total height of the old machine
Uniform shell
Test dyeing short-term
National wind mountain release board
Figure 5 Return air pressure photography The first type of test (standard test tube) FP
Note that the W and BW must comply with /AA-KU
3.2-7.1. The same air outlet for the test should be installed in the test short tube as shown in Figure 6. The short cross-sectional size is the public size of air 1. The square length is equal to the equivalent true diameter of the tube or the total length is at least 0.1. For the return air outlet, the W size in Figure 6 is the return air pressure. The static pressure hole on the wall should be measured. The auxiliary hole ratio is at least 0.05 from the inner surface of the air outlet installation process. 8
JG/T 20 -1999
3.27.2 Two kinds of existing specifications of [air vents, at least the value obtained in the new room system panel design record panel value is the minimum value of the attached Sichuan specification for the full ten-speed rapid completion of your car as the standard state of your car, 3.2.8 Calculation of return air value
3.2.8.1 After all the measured pressure knife values are corrected to the standard state of air, the total pressure or ambient air construction test or relationship diagram is made to determine the return air outlet's load
J2H local south coefficient () according to this network measurement legislation, the self-generation (~ formula (designer: return air first test device application layer ratio method:
room wind first evaluation test equipment intelligent static pressure and reach
For each product system and, the test teaching data can also be used to figure out various specifications of the value. 3.311m area tooth 4. Determination
3.3.1 Wind volume test sequence is to measure the volume of air flow and wind flow balance of the system in the province Baochuan ten wind system on-site test. 3.3.1.1 The area of the return air 11 is the same as the test sheet of the sheet force loss test. The volume flow of the air can be measured on the installation.
3.3.1.? The reason is that under the given temperature, at the position specified in the wind speed specification, the technical average of the air velocity is obtained. The measuring point should be no less than the point
. The wind speed of the non-starting blade during the test must be 3313 meters, divided by the net result of the previous product value under the ejected airflow
3.3.2 For a certain specification of air outlet, at least 4 kinds of traction methods should be carried out, or the minimum value can be obtained.4,elk3.3.3 The A value of a certain specification of air outlet should be the calculated average of several single values of the tested air. The difference between a single air supply and the average air supply is different.
4 Requirements for the test of air supply jet characteristics
For an air supply, the air supply system characteristics shall be determined as soon as possible under the specified test environment, such as the rapid and violent air supply system, and the flow characteristics shall be determined as follows: (X), the dispersion width () and the drop distance or rise distance (2). For non-isothermal jets, the difference must also be measured. For air supply outlets with adjustable flow types, the jet characteristics under high or different types shall be measured. 4. The test room
The air supply jet characteristics test shall be conducted in a closed space! The test room shall be the "test room" 4.7.: The test room shall be full of jets in a self-returning state, that is, the surrounding conditions of the room shall not affect the dispersion of the jets. Its minimum size: the room should not be less than
b. room length (should not be less than 7.
room width ()) the bottom turn is combined with the corresponding type,
1.1. All doors, windows, lighting equipment, etc. in the test room should be almost in contact with the surface on which they are installed, and there should be no obstruction to the jet flow. The whole room should be tested and guaranteed: 4.13 As long as the return air in the room affects the delivery, the return air can be installed in any position, but the return air can be installed at a low position, the room air quality is a2 The resistance coefficient of the product (6) shall be calculated according to formula (1) and formula (2): The static pressure measurement of the first type of air outlet is equal to the total pressure measurement of the third type of air outlet or the static pressure measurement of the third type of air outlet. In the formula, P and P are the static pressure and total pressure values, PaP, and ParF/
. Among them, P and P are obtained under the condition of the test. For each product series, the values of various sections are sorted out from the test data. 3.2 Return air outlet pressure loss test
3.2.1 For a product series, at least 4 specifications shall be used as representatives for the test, and each specification shall be tested under at least 4 air flow rates.
3.2.2 For each air outlet, the air outlet directly connected to it during the pressure loss test shall be tested according to the standard test section. For example, the return air short duct, air flow control door, etc. are components of the entire return air outlet. When installed, they should be connected to the standard test duct as a whole. 32.3 The return air pressure loss test device shall consist of at least one fan, a flow control panel, an air flow measuring device and a standard test section, and the test shall be carried out under isothermal conditions. 1.50 μm/s Return air pressure loss test device (standard test) 3.2.4 The return air pressure loss test period shall be measured on the simulated drop or vibration wall of the first test device shown in Figure 5 (hereinafter referred to as the wall electrode). The second test device shown in Figure 6 may also be used. The first test device can be used to determine the pressure loss in two ways, one is the static pressure measurement method (see 3.2.> and the other is the total pressure measurement method (3.2.6). The second test device adopts the static pressure measurement method (see 3.2.7). 3.2.4.1 Requirements for the wall panel of the return air vent. For the return air vent of the shape and shape or rectangle, the distance between the wall panel boundary and each side of the return air vent shall be at least 2 times the diameter of the test material (). For the return air vent of the shape and shape or rectangle, the distance between the wall panel boundary and each side of the return air vent shall be two times the diameter of each side. For the special vent (such as the windshield), the wall panel can be omitted as long as it does not affect the air velocity distribution of the four vents.
3-2.4.2 For the vent equipped with the air flow regulating valve, the selected position or opening degree of the vent shall be indicated when the pressure loss test is carried out.
3.2.5 The return air pressure is a common method for static pressure resistance test. 3.2.5.1 The test area should be installed on a standard test pipe (Figure 5). The test area size is equal to the nominal size of the air outlet. The standard test pipe contains an entire return air volume. The installation distance of the return air of the test is at least 7 meters. 3.2.5.2 The arrangement of the test air outlet shall be as shown in Figure 5. The static pressure measurement point shall be located downstream of the test air outlet. At a distance of not less than 1D below, the static pressure measurement point shall be moved along the center line of the test air outlet to control the static pressure (relative value) until the displacement is minimized. The measured pressure is the return air pressure value. For another pressure method, the measuring surface shall be located at 6 places downstream of the test air outlet. The static pressure measurement points shall be located at two equal vertical pipe diameters on the surface. The difference between the maximum and minimum values of the measured pressure shall not exceed 10% of the average value of the new pressure. 3.2.5.3 For a test air outlet of a certain specification, the minimum pressure measurement points shall be recorded. The static pressure measurement value and static pressure measurement under the air conditioner are carried out simultaneously. 3-2.5.4 The forward pressure loss can be corrected by formula (3): H=PL/DP, where: F is the static pressure loss of the air outlet P, the forward pressure measurement value, FaF is the distance from the previous air outlet to the house, the measurement position, P is the hydraulic diameter of the standard test pipe, P is the average dynamic pressure in the standard test pipe, P is equal to 1 and is obtained under the same conditions: A is the standard test pipe fault detection coefficient, which can be taken as 0.2?. 53 2
3.2.5.5 The sum of the total pressure obtained by the total output and the air flow rate calculated during the test, also referred to as the receiving pressure, shall also be taken as the pressure value when the air is in a normal state. 3.2.6 Total pressure measurement method for return air outlet pressure loss test 3.2.6.1 Test device The small measurement area shown in Figure 3 and the cabinet network shown in 7.2.5.2 shall be located on the measurement surface. At least 5 measurement points shall be set on the measurement surface (see Figure) to carry out total pressure measurement. The arithmetic half of the 5 total pressure values measured at the total output loss level shall be taken as the average. At the 5 measurement points on the measurement surface [ : Net pressure measurement can also be carried out, and the vertical difference of static pressure should be more than 20% of the average low of the measured area:
-A standard test return air outlet, the total pressure measurement value under a certain room air flow rate should be remembered, the flow mother and total pressure measurement are the same as 3.2.6 2
through the line,
3-2.6.3 Return air outlet total pressure loss formula (4) is used to obtain: Pca/DF
The derived pressure, the reference is the total pressure value of the standard air, 32.7 The static pressure measurement method of the air outlet pressure loss test device TH City C.15in
Minimum om
Static year
Total height of the old machine
Uniform shell
Test dyeing short-term
National wind mountain release board
Figure 5 Return air pressure photography The first type of test (standard test tube) FP
Note that the W and BW must comply with /AA-KU
3.2-7.1. The same air outlet for the test should be installed in the test short tube as shown in Figure 6. The short cross-sectional size is the public size of air 1. The square length is equal to the equivalent true diameter of the tube or the total length is at least 0.1. For the return air outlet, the W size in Figure 6 is the return air pressure. The static pressure hole on the wall should be measured. The auxiliary hole ratio is at least 0.05 from the inner surface of the air outlet installation process. 8
JG/T 20 -1999
3.27.2 Two kinds of existing specifications of [air vents, at least the value obtained in the new room system panel design record panel value is the minimum value of the attached Sichuan specification for the full ten-speed rapid completion of your car as the standard state of your car, 3.2.8 Calculation of return air value
3.2.8.1 After all the measured pressure knife values are corrected to the standard state of air, the total pressure or ambient air construction test or relationship diagram is made to determine the return air outlet's load
J2H local south coefficient () according to this network measurement legislation, the self-generation (~ formula (designer: return air first test device application layer ratio method:
room wind first evaluation test equipment intelligent static pressure and reach
For each product system and, the test teaching data can also be used to figure out various specifications of the value. 3.311m area tooth 4. Determination
3.3.1 Wind volume test sequence is to measure the volume of air flow and wind flow balance of the system in the province Baochuan ten wind system on-site test. 3.3.1.1 The area of the return air 11 is the same as the test sheet of the sheet force loss test. The volume flow of the air can be measured on the installation.
3.3.1.? The reason is that under the given temperature, at the position specified in the wind speed specification, the technical average of the air velocity is obtained. The measuring point should be no less than the point
. The wind speed of the non-starting blade during the test must be 3313 meters, divided by the net result of the previous product value under the ejected airflow
3.3.2 For a certain specification of air outlet, at least 4 kinds of traction methods should be carried out, or the minimum value can be obtained.4,elk3.3.3 The A value of a certain specification of air outlet should be the calculated average of several single values of the tested air. The difference between a single air supply and the average air supply is different.
4 Requirements for the test of air supply jet characteristics
For an air supply, the air supply system characteristics shall be determined as soon as possible under the specified test environment, such as the rapid and violent air supply system, and the flow characteristics shall be determined as follows: (X), the dispersion width () and the drop distance or rise distance (2). For non-isothermal jets, the difference must also be measured. For air supply outlets with adjustable flow types, the jet characteristics under high or different types shall be measured. 4. The test room
The air supply jet characteristics test shall be conducted in a closed space! The test room shall be the "test room" 4.7.: The test room shall be full of jets in a self-returning state, that is, the surrounding conditions of the room shall not affect the dispersion of the jets. Its minimum size: the room should not be less than
b. room length (should not be less than 7.
room width ()) the bottom turn is combined with the corresponding type,
1.1. All doors, windows, lighting equipment, etc. in the test room should be almost in contact with the surface on which they are installed, and there should be no obstruction to the jet flow. The whole room should be tested and guaranteed: 4.13 As long as the return air in the room affects the delivery, the return air can be installed in any position, but the return air can be installed at a low position, the room air quality is a2 The resistance coefficient of the product (6) shall be calculated according to formula (1) and formula (2): The static pressure measurement of the first type of air outlet is equal to the total pressure measurement of the third type of air outlet or the static pressure measurement of the third type of air outlet. In the formula, P and P are the static pressure and total pressure values, PaP, and ParF/
. Among them, P and P are obtained under the condition of the test. For each product series, the values of various sections are sorted out from the test data. 3.2 Return air outlet pressure loss test
3.2.1 For a product series, at least 4 specifications shall be used as representatives for the test, and each specification shall be tested under at least 4 air flow rates.
3.2.2 For each air outlet, the air outlet directly connected to it during the pressure loss test shall be tested according to the standard test section. For example, the return air short duct, air flow control door, etc. are components of the entire return air outlet. When installed, they should be connected to the standard test duct as a whole. 32.3 The return air pressure loss test device shall consist of at least one fan, a flow control panel, an air flow measuring device and a standard test section, and the test shall be carried out under isothermal conditions. 1.50 μm/s Return air pressure loss test device (standard test) 3.2.4 The return air pressure loss test period shall be measured on the simulated drop or vibration wall of the first test device shown in Figure 5 (hereinafter referred to as the wall electrode). The second test device shown in Figure 6 may also be used. The first test device can be used to determine the pressure loss in two ways, one is the static pressure measurement method (see 3.2.> and the other is the total pressure measurement method (3.2.6). The second test device adopts the static pressure measurement method (see 3.2.7). 3.2.4.1 Requirements for the wall panel of the return air vent. For the return air vent of the shape and shape or rectangle, the distance between the wall panel boundary and each side of the return air vent shall be at least 2 times the diameter of the test material (). For the return air vent of the shape and shape or rectangle, the distance between the wall panel boundary and each side of the return air vent shall be two times the diameter of each side. For the special vent (such as the windshield), the wall panel can be omitted as long as it does not affect the air velocity distribution of the four vents.
3-2.4.2 For the vent equipped with the air flow regulating valve, the selected position or opening degree of the vent shall be indicated when the pressure loss test is carried out.
3.2.5 The return air pressure is a common method for static pressure resistance test. 3.2.5.1 The test area should be installed on a standard test pipe (Figure 5). The test area size is equal to the nominal size of the air outlet. The standard test pipe contains an entire return air volume. The installation distance of the return air of the test is at least 7 meters. 3.2.5.2 The arrangement of the test air outlet shall be as shown in Figure 5. The static pressure measurement point shall be located downstream of the test
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