Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T4329-1997
Positive Displacement Chiller (Heat Pump) Unit
1997-04-15 Issued
JB/T4329—1997
Ministry of Machinery Industry of the People's Republic of China
1998-01-01 Implementation
JB/T4329—1997
Cited Standards
Type and Basic Parameters
4 Technical Requirements
5 Test Methods
Inspection Test rules ·
7 Marking, packaging and storage
Appendix A (suggestive appendix)
Appendix B (suggestive appendix)
JB/T4329-1997
Example of calculation of allowable deviation
Example 2 of calculation of condenser inlet temperature of various types of units at partial load
JB/T4329-1997
This standard is a revision of JB432986 "Technical conditions for screw chillers" and ZBJ73041-89 "Technical conditions for piston chillers".
This standard adopts the Japanese Industrial Standard JIS B8613-86 "Chillers" in a non-equivalent manner, and adds requirements such as partial load performance. Both Appendix A and Appendix B of this standard are suggestive appendices. From the date of entry into force, this standard replaces both JB4329-86 and ZBJ73041-89. This standard is proposed and managed by the Refrigeration Equipment Standardization Technical Committee of the Ministry of Machinery Industry. The drafting units of this standard are: Fuzhou Yangfan Air Conditioning Co., Ltd., and Hefei General Machinery Research Institute of the Ministry of Machinery Industry. The main drafters of this standard are: Yi Xuecheng, Chen Kefu, and Ren Jinlu. 1
Machinery Industry Standard of the People's Republic of China
Positive Displacement Chiller
(Heat Pump) Unit
JB/T 4329—1997
This standard specifies the type, basic parameters, technical requirements, test methods, inspection rules, marking, packaging and storage basic requirements of motor-driven integral volumetric chillers (heat pumps) (hereinafter referred to as units). This standard applies to central air-conditioning units with a cooling capacity of 10-1160kW (not necessarily shipped as a whole). It also applies to units that add chemical agents to water for cooling (or heating) to prevent freezing due to a drop in outdoor temperature. This standard does not apply to drinking water, beverages and industrial refrigeration or heat pump heating units that do not use water as a cooling (heat) medium. 2
Cited standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest version of the following standards. GB 5361988
GB 755—1987
GB1226—1986
GB 1497—1985
GB/T 1804—1992
GB 3906—1991
GB 4706.32—1996
GB 73731987
GB 10079—1988
GB 10870—1989
GB 10872—1989
GB 108751989
GB/T 13306—1991
GB/T 133841992 | | tt | tt||JB/T 6906—1993
JB/T 6917—1993
JB/T6918—1993
Liquid anhydrous ammonia
Basic technical requirements for rotating electrical machines
General pressure gauges
Basic standards for low-voltage electrical appliances
General tolerances Unspecified tolerances for linear dimensions
3~35kV AC metal-enclosed switchgearSafety of household and similar electrical appliancesSpecial requirements for heat pumps, air conditioners and dehumidifiersLow-voltage complete switchgear
Industrial chlorodifluoromethane (F22)
Fully enclosed piston refrigeration compressors
Performance test methods for volumetric chillers
Technical conditions for small piston single-stage refrigeration compressorsMedium piston single-stage refrigeration compressors Technical conditions and labels
Packaging of electromechanical products
General technical conditions
General technical conditions for three-phase asynchronous motors for closed refrigeration compressorsDesign specifications for industrial circulating cooling water treatment
Thermal expansion valves for R12, R22, R502 for refrigerationSolenoid valves for refrigeration
Determination of sound power level of noise in refrigeration and air-conditioning equipmentAxial flow fans for HVAC and air conditioning
Oil-injected screw single-stage refrigeration compressors
Pressure vessels for refrigeration equipment
Metal and glass sintered liquid level gauges and sight glasses for refrigerationApproved by the Ministry of Machinery Industry on April 15, 1997
Engineering Law
Implementation on January 1, 1998
JB/T 7230—1994
JB/T7245—1994
JB/T 7247—1994
JB/T 7658.5—1995
JB/T 7659.2—1995
JB/T 7659.4—1995
JB /T 7659.5—1995
JB/T 76661995
JB/T 7771—1995
ZB J73 022-
ZBJ73 025-
ZBJ73 031-
ZB N04 009—1988
SH 0349—1992
Types and basic parameters
JB/T 4329-1997
Four-way electromagnetic reversing valve for heat pump
Stop valve for refrigeration
Lithium bromide absorption chiller
Evaporative condenser for ammonia refrigeration device
Water-cooled condenser for Freon refrigeration device
Dry evaporator for Freon refrigeration device
Fin heat exchanger for Freon refrigeration deviceNominal working conditions of refrigeration and air-conditioning equipmentGeneral provisionsPressure and pressure difference controller for refrigeration
Unit Test method for air conditioner
Model compilation method for refrigerator
Flare-mouth pipe joint nut for refrigeration
Industrial automation instrument panel
Refrigeration oil
General technical conditions
Type (the unit type code is in brackets, and the code is not indicated in the model) 3.1.1 Classification by refrigeration compressor type
Open type:
Semi-enclosed type (B);
Fully enclosed type (Q).
3.1.2 Classification by refrigeration compressor type
Reciprocating piston type:
Twin screw type (LG);
Single screw type (DG);
Scroll type (W).
3.1.3 Classification by unit function
Cooling only unit:
Combined cooling and heat pump heating unit (R), including units that use heat pump heating and electric heating at the same time and units that use heat pump heating and electric heating devices in a switchable manner:
Combined cooling and electric heating unit (D). Classification by heat exchange method on the heat source side (heat release side) 3.1.4
Water-cooled (water heat source):
Air-cooled (F)-air heat source:
Evaporative cooling (Z).
3.1.5 Classification by refrigerant type
Refrigerants such as R22 and R134a:
R717-ammonia refrigerant (A):
Mixed refrigerants such as R407C and R410A (H). 2 Model
The compilation method of the unit model shall comply with the provisions of ZBJ73025 and the following provisions. There are 17 pages left to read. Do you want to continue reading? This document was shared by zhangalian on 2015-08-262 The unit model representation method is as follows:
Model example:
JB/T43291997
Additional code: determined by the manufacturer
Nominal cooling capacity: expressed in Arabic numerals, unit kW Type code: classified by refrigerant type (see 3.1.5) Type code: classified by heat exchange method on the heat source side (see 3.1.4) Type code: classified by function (see 3.1.3) Type code: classified by compressor type (see 3.1.2) Type code: classified by compressor type (see 3.1.1) Basic code of water chiller
Cooling capacity 350kW, open piston compressor, refrigerant hydrogen single cooling, water cooling unit: LSA350
Cooling capacity 175kW, semi-hermetic twin-screw compressor, Air-cooled unit for refrigeration and heat pump heating with refrigerant R22: LSBLGRF175
Refrigerating capacity: 58kW, fully enclosed scroll compressor, evaporative cooling unit for refrigeration and electric heating with refrigerant R407C: LSQWDZH58
Basic parameters
3.3.1 Nominal operating conditions
In addition to the provisions of JB/T7666, the temperature conditions at the nominal operating conditions of the unit shall also comply with the provisions of Table 1. Table 1 Temperature conditions at nominal operating conditions
Using side
Heat pump heating
Cold and hot water
Inlet water temperature
Water-cooled
Outlet water temperature
Inlet water humidity
Heat source side (or heat release side)
Air-cooled
Outlet water temperature dry bulb temperature
Wet bulb temperature
Evaporative cooling
Dry bulb temperature
Wet bulb temperature
1) Applicable to units where wet bulb temperature affects the heat exchange of the condenser (units that use the latent heat of condensed water, etc. as the heat source) 2) The dry bulb temperature is only taken as zero for consideration, and the supplementary water temperature is 30℃, 2 Other provisions for nominal conditions
a) The fouling coefficient of the using side and water-cooled heat source side at the nominal operating conditions of the unit is 0.086m,℃kW. b) The rated voltage of the unit at nominal working condition is 220V for single-phase AC and 380V for three-phase AC, and the rated frequency is 50H. 3.3.3 Refrigeration performance coefficient at nominal working condition
The refrigeration performance coefficient at nominal working condition of the unit shall not be lower than the value in Table 2, and the unit with heat pump heating shall not be lower than 95% of the value specified in Table 2
Compressor type
Unit cooling capacity kW
Water-cooled
Air-cooled and evaporative cooling
Technical requirements
General provisions
JB/T43291997
Table 2 Refrigeration performance coefficient at nominal working condition
Reciprocating piston
> 45-116
Screw type and other rotary positive displacement
≤116
>116-230
The unit shall comply with the provisions of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures (or according to the agreement between the user and the manufacturer). Supporting equipment of the unit
Compressor motor unit composed of one or more positive displacement compressors and equipped with the necessary lubrication system. 4.2.1E
a) Motor for closed compressor: the motor is enclosed in the refrigerant atmosphere; b) Motor for open compressor: motor, coupling or pulley or necessary gears, etc. 4.2.2 Condenser (evaporator when heat pump heating): water-cooled condenser or air-cooled condenser or evaporative cooling condenser. 4.2.3 Evaporator (condenser when heat pump heating): refrigerant-water heat exchanger. 4.2.4
Other supporting equipment
a) Control equipment required to adjust the cooling capacity of the unit (except for small units with a single compressor); b) Safety protection equipment required to meet safety regulations: c) Electrical control equipment and related instruments of the unit. 4.3
Main supporting parts of the unit
Main supporting parts of the unit shall comply with the provisions of the relevant standards. 4.3. 2
Refrigeration compressors shall comply with the following standards:
a) Open and semi-closed refrigeration compressors shall comply with the provisions of GB10872 and GB10875: b) Fully closed refrigeration compressors shall comply with the provisions of GB10079: c) Screw refrigeration compressors shall comply with the provisions of JB/T6906. 4.3.3 The matching motors shall comply with the provisions of GB755, and the closed motors shall comply with the provisions of GB13500. 4.3.4 The pressure vessels, condensers and evaporators of the units shall comply with the requirements of JB/T6917, JB/T7659.2, JB/T7659.4, JB/T7659.5 and JB/T7658.5.
4.3.5 The pipeline accessories and safety protection components and devices used in the unit shall comply with the following standards: a) The stop valve for refrigeration shall comply with the provisions of JB/T7245, and the solenoid valve shall comply with the provisions of JB/T4119; b) The four-way solenoid reversing valve for heat pump shall comply with the provisions of JB/T7230; c) The pressure and differential pressure controller for refrigeration shall comply with the provisions of JB/T7771; d) The axial flow fan used in the unit shall comply with the provisions of JB/T6411; e) The thermal expansion valve shall comply with the provisions of JB/T3548; f The flared pipe joint nut for refrigeration shall comply with the provisions of ZBJ73031; g) The pressure gauge for the unit shall comply with the provisions of GB1226, and the liquid level gauge and sight glass shall comply with the provisions of JB/T6918. 4.3.6 The refrigeration oil for the unit shall comply with the provisions of SH0B49 or other corresponding standards. 4.3.7 The control instrument cabinet and the selected switchgear of the unit shall comply with the provisions of GB1497, GB3906, GB7251 and ZBN04009.
4.3.8 The refrigerant used in the unit shall comply with the provisions of GB7373 and GB536 and other first-class or above grades, and the new refrigerant for protecting the ozone layer shall comply with the provisions of relevant standards.
Requirements for air tightness test, vacuum test and hydraulic test 4.4.1 Air tightness test
JB/T43291997
When the unit is tested, the pressure of the refrigeration system shall not drop significantly and there shall be no oil leakage in all parts. 4.4.2 Vacuum test
When the unit is tested,
There shall be no abnormal deformation in all parts of the refrigeration system, and the pressure rise shall be below 0.69kPa. 4.4.3 Hydraulic test
When the unit is tested, there shall be no water leakage in the water pipes at all parts of the water side. 4.5
Nominal performance of the unit
When the unit is tested under nominal conditions of refrigeration and heat pump heating, its maximum deviation shall not exceed the following provisions. For calculation examples, see Appendix A (suggestive appendix).
a)) The refrigeration capacity and heat pump heating capacity shall not be less than 92% of the nominal specified valueb) The total power consumption of heat pump heating shall not be greater than 110% of the nominal power consumption of the unit (the total power consumption of heat pump heating does not include the power consumption of auxiliary electric heating):
c) The power consumption of auxiliary electric heating of heat pump heating units with auxiliary electric heating shall not be greater than 105% of the nominal power consumption: d) The coefficient of refrigeration performance under nominal conditions shall not be less than 92% of the nominal value of the unite) The pressure loss of cold (hot) water and cooling water shall not be greater than 115% of the nominal specified value of the unit. 4.6
Design and use conditions of the unit
The unit shall operate normally under the temperature conditions specified in Tables 3 and 4. The temperature deviations in the table are the conditions to be observed during the test. Table 3
Using side
Nominal working condition
Maximum load working condition
Low temperature working condition
Nominal working condition
Maximum load working condition
Defrosting working condition 9)
Cold and hot water
Inlet water temperature
12± 05
40± 05
40± 05
1) Same as Note 1 in Table 1):
Temperature conditions for unit design and use
Heat source side (or heat release side)
Water-cooled
Outlet water temperature
2) Same as Note 2 in Table 1)
3) Determined by the amount of cold water at nominal refrigeration conditions: Inlet water temperature
15.5±0.5
4) Determined by the amount of cooling water at nominal refrigeration conditions: 5) Make-up water temperature 33℃±2C;
6) Make-up water temperature is about 15℃±2℃:
7) Determined by the hot water flow at nominal heat pump heating conditions: 8) Determined by the heat source water flow at nominal heat pump heating conditions: Outlet water temperature
35± 05
21 ± 05
7± 05
Air-cooled
Dry-bulb humidity
43± 1
Wet-bulb temperature
24±0.51)
25.5±0.51)
15.5±0.5bzxZ.net
6± 05
15.5±0.5
9) The defrost condition refers to the condition before the defrost operation. When starting the defrost, the temperature conditions specified in Table 4 and Table 3 are acceptable. Table 4
Defrosting conditions
Yanfa cooling type
Dry bulb temperature
35± 22)
38± 22)
21± 22)
Wet bulb temperature
27± 0.55
15.5±0.56)
Heat pump defrosting
4.6.1 Maximum load condition
Inlet water temperature
40± 3
JB/T43291997
Outlet water temperature
Dry bulb temperature
Wet bulb temperature
When the unit is operated according to the maximum load condition in Table 3, the motor, electrical components, connecting wiring and other components should work normally. During the maximum load test of heating, the electric heating equipment is allowed to stop working. 4.6.2 Low temperature conditions
When the unit is operated under low temperature conditions in Table 3, the motor and other components should work normally. 4.6.3
Defrosting conditions
When the unit is operated under defrosting conditions in Table 3 and Table 4 (air source heat pump units equipped with automatic defrosting mechanisms), the following requirements should be met: Safety protection components and devices should not be activated and stop operation; defrosting should be carried out automatically;
The melted water during defrosting and the condensed water of the outdoor side (heat source side) heat exchanger during heating operation should be able to be discharged or processed normally: In the continuous operation after the initial defrosting, the total time required for defrosting should not exceed 20% of the operating cycle time. For units with more than two independent refrigeration cycles, the total defrosting time of each independent cycle should not exceed 20% of the total operating time of each independent cycle. 4.6. 4
Variable operating performance
The temperature conditions of the variable operating performance of the unit are shown in Table 5. Table 5
Usage side
Heat pump heating
Cold and hot water
Inlet water temperature
Partial load performance
Outlet water temperature
Variable operating performance temperature range
Heat source side (or heat release side)
Water-cooled
Inlet water temperature
Outlet water temperature
Air-cooled
Dry bulb temperature
Wet bulb temperature
Units with a cooling capacity greater than 35kW should be equipped with an unloading mechanism, and its action should be flexible and reliable. ℃
Evaporative cooling
Dry bulb temperature
Wet bulb temperature
For chillers with two or more stages of unloading, the partial load performance characteristics (including cooling capacity, power consumption and refrigeration performance coefficient) shall be measured at 100%, 75%, 50% and 25% load points under the conditions specified in Table 6. 4.7.2
If the unit cannot be operated at the partial load points specified in 4.72, the unit may be operated at other load points, but the partial load performance characteristics shall be measured under the conditions specified in Table 6. 4.7. 4
The following provisions should be observed during the partial load performance test: The cold water outlet temperature is the specified value under nominal conditions: Provisions on the heat release side:
Water-cooled: The cooling water flow rate is the flow rate under nominal conditions; Air-cooled: The condenser cooling air volume can change with the change of the unit unloading conditions: Evaporative cooling: The condenser cooling air volume can change with the change of the unit unloading conditions, but the water flow rate is the flow rate under nominal conditions, and the make-up water temperature is equal to the wet-bulb temperature:
The cold water flow rate is the flow rate under nominal conditions;
The fouling coefficient of cold water and cooling water is 0.086m·℃/kW; 18
JB/T4329-1997
When the voltage and frequency are under nominal conditions Rated voltage and rated frequency; condenser inlet cooling water temperature, air inlet dry bulb temperature and air inlet wet bulb temperature are calculated by formula (1) as specified in Table 6 (linear change), for example, see Appendix B (suggestive Appendix); Table 6 Heat release side temperature conditions at partial load performance Unit type
Water-cooled
Air-cooled
Evaporative cooling
Condenser inlet temperature
Condenser inlet cooling water temperature
Condenser inlet dry bulb temperature
Condenser inlet wet bulb temperature
Coefficient A
Condenser inlet temperature = AX (percentage of full load cooling capacity) + B Partial load performance data should be expressed as a percentage of nominal conditions. 4.8
Noise and alarm
Coefficient B
The unit shall be measured for noise sound pressure level. When the noise value of the unit exceeds the noise limit of relevant regulations, the unit shall be soundproofed and its noise sound pressure level shall be evaluated according to the test value after treatment. The unit shall be measured for vibration. The noise and vibration values of the unit shall be provided in the product sample. Electrical safety regulations
Voltage change performance
The unit operates under the nominal conditions of cooling and heat pump heating in Table 3. When the rated voltage is changed, the safety protection mechanism does not operate. The overheating protector of the heat pump heating unit with auxiliary electric heating should not operate either. The unit has no abnormal phenomenon and can operate continuously. 4.9. 2
Temperature limit
When the unit is operating under the nominal conditions of cooling and heat pump heating in Table 3, the temperature of the motor winding shall comply with the provisions of Table 7, and the temperature of the connection points and branching points of the power cord, the knobs and buttons of the indicator, the housing that may be touched by the human body and the surface temperature of the wooden frame where the tested product is placed shall comply with the provisions of Table 8.
The temperature of other parts shall not rise abnormally. Table 7 Allowable temperature of motor coils
Measurement part
Class A insulation
Class E insulation
Class B insulation
Class F insulation
Class H insulation
1The data in brackets are applicable to rotary compressor coils. 2 Values of motors for closed compressors, add 5C to the values in the table. Allowable temperature of the outer shell surface
Measurement location
≤100
≤115
≤125(120)
≤150 (140)
≤170 (165)
JB/T43291997
Connections and branch connections of power cords, etc.
Knobs and buttons of indicators, etc.
Metal products, ceramic products, glass products and other products
Outer surfaces that may be touched by the human body
Surface of the wooden frame where the tested product is placed
Insulation resistance
The insulation resistance between the live parts of the unit and the non-live parts that may be grounded shall not be less than 1MQ. 4.9.4 Withstand voltage
After the test in 4.9.3,
the unit shall be able to withstand the applied test voltage when the test voltage is applied between the live parts and the non-live parts. 4.9.5 Starting performance
When doing the starting test,
the stop position is irrelevant.
4.9.6 Moisture resistance performance
The starting current value shall be less than 115% of the specified starting current value, and the motor starting test shall be carried out with the motor rotor unit. After the moisture resistance test, the insulation resistance value shall not be less than 1MQ, and shall comply with the withstand voltage test provisions of 4.9.4. 4.9.7 Water spray insulation performance
After the water spray test is carried out on the outdoor side of the unit in the use state, the insulation resistance value shall not be less than 1MQ, and shall comply with the withstand voltage test provisions of 4.9.4.
4.9.8 The electrical safety of air-cooled heat pump units and water-source heat pump units for household and similar purposes shall comply with the provisions of B4706.32. 4.10 The surfaces in contact with the refrigerant and lubricating oil in the unit shall be kept clean and dry, and the outer surfaces of the unit shall be clean and the painted surface shall be smooth. The installation of pipe accessories shall be horizontal and vertical, and beautiful. The unit's overall dimensions shall comply with the design requirements, and its length, width and height deviations shall not exceed the provisions of c (rough grade) in GB/180492.
The user shall comply with the provisions of the unit's transportation, storage, installation, use and maintenance. Within 18 months from the date of shipment from the manufacturer, if the unit is damaged or fails to work properly due to poor manufacturing quality, the manufacturer shall replace or repair it free of charge. 5
Test method
Accuracy of measuring instruments and measurement regulations
Accuracy of measuring instruments: in accordance with the provisions of Appendix A of GB1087089 and ZBJ73022 (the missing part in GB10870). The measurement regulations are as follows:
a) The installation and use of measuring instruments shall be in accordance with the provisions of Appendix A and Appendix B of GB10870-89; b) The measurement of air wet bulb temperature shall be in accordance with the provisions of ZBJ73022, and the sampling method shall be used for measurement: c) The dry and wet bulb temperatures of the air inlet of the air-cooled and evaporative cooling types shall be measured at the midpoint of each air inlet surface of the unit, 0.60m vertically away from the surface, and the average value shall be taken.
Unit installation and test regulations
5.2.1 Temperature conditions: The water temperature and air dry-bulb and wet-bulb temperature deviations of the unit shall comply with the provisions of Table 3. The unit under test shall operate at rated frequency and rated voltage, and its deviation value shall not be greater than ±2% of the rated value. 5.2.2 The unit under test shall be installed in accordance with the method specified by the manufacturer, and no structural modifications that affect the cooling capacity and heating capacity of the heat pump shall be made. The environment of air-cooled and evaporative cooling units shall be sufficiently dispersed, and the wind speed near the unit shall be reduced to a sufficiently low value to avoid affecting the performance of the unit.
3 Water quality: The water quality used by the unit shall comply with the provisions of GBJ50. 5.2. 3
Test requirements
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