Some standard content:
Mechanical Industry Standard of the People's Republic of China
Performance Test Method of Automobile Air Conditioner
Subject Content and Scope of Application
This standard specifies the test conditions, instruments and items of automobile air conditioners (hereinafter referred to as air conditioners). JB/T6914-93
This standard applies to the refrigeration performance test of air conditioners used in cars or buses to create a comfortable environment for personnel, and does not apply to the heating performance test.
Referenced Standards
GB5773 Performance Test Method of Volumetric Refrigeration Compressor ZBJ73022 Test Method of Unitary Air Conditioner JB4330 Engineering Method for Determination of Noise Power Level of Refrigeration and Air Conditioning Equipment
3 Performance Test
3.1 Test Conditions
The air state at the inlet of the evaporator and condenser shall comply with the provisions of Table 1. 3.1.1
Table 1
Air state
Emitter air inlet
Condenser air inlet
3.1.2 The compressor speed shall comply with the provisions of Table 2. Type
Main engine drive type
Type
Auxiliary engine drive
3.1.3 The headwind speed of the condenser shall comply with the provisions of Table 3. Speed.r/min
1000
1800
3600
Dry bulb temperature
27.0±1.0
35.0±1.0
Table 2
Low speed
Medium speed
High speed
Table 3
Note: The air conditioner with its own fan on the condenser is tested with the fan at high speed. Approved by the Ministry of Machinery Industry of the People's Republic of China on July 13, 1993, 974
Wet bulb temperature
19.5±0.5
Speed
±25
1000
1800
3600
High speed gear
Condenser headwind speed, m/s
2.5±0.1
4.5±0.1
9.0±0.1
C
r/min
Implementation on July 1, 1994
JB/T 6914—93
The voltage of the fan motor shall comply with the provisions of Table 4. 3.1.4
Table 4
Rated voltage
12
24
Note: Terminal voltage refers to the voltage of the air conditioner system terminal. 3.1.5 The ambient temperature of the compressor of the tested air conditioner shall not be less than 65℃. 3.1.6 The ambient temperature of the receiver dryer shall comply with the provisions of Table 5. Table 5
Installation location
In front of the condenser partition
Inside the engine compartment
3.1.7 The static pressure at the evaporator fan outlet and the condenser fan outlet is specified to be 0Pa. 3.2 Measuring instruments and accuracy
3.2.1 General provisions
3.2.1.1 The types of instruments used in the test can be one or more. Terminal voltage
13.5±0.1
27±0.1
Temperature
35
65
3.2.7.2 The test instruments shall have a valid certificate calibrated by the measurement or relevant departments. 3.2.2 Temperature measuring instruments
3.2.2.1 Mercury thermometers, thermocouples, thermal resistors or other types of instruments that meet the requirements of Article 3.2.2.2 may be used. 3.2.2.2 Accuracy of temperature instruments
Instruments used to measure air temperature: accuracy is ±0.2℃, resolution is not greater than 0.1℃; a.
Instruments used to measure refrigerant temperature: accuracy is ±0.5℃, resolution is not greater than 0.2℃. b.
3.2.2.3 Provisions for temperature measurement
C
The thermometer used to measure the temperature of the refrigerant can be inserted directly into the refrigerant pipe using a thermometer sleeve or under the condition of ensuring pressure-resistant sealing. When the refrigerant pipe is small, the countercurrent oblique insertion method can be adopted, and the direct insertion depth should not be less than 8 to 10 times the outer diameter of the thermometer. The thermometer sleeve should be filled with refrigeration oil, and the thermometer should not be pulled out when reading. The air temperature in the duct should be measured at the center of each equal grid of the duct cross section, with no less than three points or using a suitable mixer and sampling device. The typical mixer and sampler are shown in Figure 1. Lubricator
Figure 1
Sampler
The air temperature entering the condenser and evaporator should be measured at at least three points around the condenser and evaporator or using a suitable sampling device. The air at the measuring point should not be affected by the exhaust air. The temperature sampling device or thermometer should be 600mm away from the surface of the condenser and 150mm away from the air inlet of the evaporator to avoid the influence of heat radiation on the air temperature measurement. d. The wind speed flowing through the surface of the wet bulb thermometer should be about 5m/s, and the sampling wind speed entering and leaving the evaporator should be the same.
3.2.3 Pressure, differential pressure measurement and instrument accuracy 3.2.3.1 The instrument used to measure the refrigerant pressure can be a spring tube pressure gauge or a pressure sensor. The instrument accuracy is not less than 1.5%, the division of the high pressure side measurement is not more than 0.02MPa, and the division of the low pressure side measurement is not more than 0.01MPa. 3.2.3.2 The atmospheric pressure can be measured by a mercury column pressure gauge or an absolute pressure transmitter. Its accuracy is 0.1% and the resolution is not more than 30 Pa.
3.2.3.3 Static pressure or pressure difference shall be measured by micro differential pressure gauge or micro differential pressure transmitter. Its measurement accuracy shall not be less than 0.25 and its resolution shall not be greater than 10 Pa.
3.2.4 Electric quantity measurement and instrument accuracy
Current, voltage, frequency and power can be measured by indicating instrument, integrating instrument or electric quantity transmitter. The accuracy of indicating instrument or electric quantity transmitter is 0.5 level and the measured value is required to be above 1/3 of the instrument range. The accuracy of integrating instrument is 1%. 3.2.5 Speed ??measurement and instrument accuracy
Speed ??measurement can be carried out by flash frequency tachometer, photoelectric tachometer or magnetoelectric tachometer with an accuracy of 1%. 3.2.6 Drive power measurement and instrument accuracy
The compressor drive power can be measured by torque sensor, torque meter or measuring the input power of the drive motor with an accuracy of 1%. The torque meter should not remove the power absorbed by the drive belt and the compressor clutch when zeroing. 3.2.7 Time measurement and instrument accuracy
Time measurement can be carried out by a stopwatch or electronic timer with an accuracy of 1%. 3.2.8 Wind speed measurement and instrument accuracy
Wind speed measurement can be carried out by a hot wire anemometer or a pitot tube with an accuracy of 1%. 3.3 Performance test
3.3.1 Test device
3.3.1.1 The layout of the test device is shown in Figure 2. B
@
G
@
@
?@@
1-Flow measurement device: 2-Adjustable exhaust system; 3-Air handling unit: 4-Evaporator 5-Condenser; 6~Compressor; 7-Drive device, 8-Air supply system Figure 2
3.3.1.2 The functions and requirements of the test device are as follows: a. Each test room shall be equipped with air handling equipment to ensure that the state of air entering each part of the tested air conditioner during the test meets the requirements of Articles 3.1.1, 3.1.5 and 3.1.6. The air handling equipment consists of a heater, a humidifier and a cooler. b. The measuring air ducts of the condenser and evaporator shall be equipped with an adjustable exhaust system to adjust the static pressure of the air inlet chamber of the measuring air duct to meet the requirements of Article 3.1.4 of 976
JB/T 6914—93
c. The sampling of air temperature shall meet the requirements of Articles 3.2.3.2~~3.2.3.4. 3.3.2 Air flow test
3.3.2.1 The air flow measurement device is shown in Figure 3. Porous plate
?500
75±5
Micro differential pressure gauge
2500
n
2X38±5 micro pressure gauge
Figure 3
Nozzle
1
-
1
Porous plate
Adjustable exhaust system
A porous plate with an effective area of ??30% to 40% should be set between the air inlet chamber and the nozzle, and two plates with an effective area of ??a.
55%~65% multi-well plate. The pore diameter of the porous plate should be no less than 10mm, and the spacing between each plate should be greater than 10 times the pore diameter. The wind speed at the cross-section of the air duct between the porous plate and the nozzle should not be greater than 2 m/s. b. A porous plate with a maximum effective area of ??50% is placed downstream of the nozzle, and the distance from the nozzle is 22D (D is the maximum diameter among multiple nozzles
).
The wind speed at each point of the cross-sectional area of ??the air duct in the air inlet chamber should not be greater than 2m/s, and the wind speed is calculated using formula (1). c.
Q
A
where: -
-wind speed, m/s;
air volume, m2/s;||tt| |Q
A air duct cross-sectional area, m2.
The equivalent diameter of the rectangular duct is 2ab/yuan (α and b are the side lengths of the rectangular duct respectively). The throat diameter of the nozzle is generally 70 or 80mm. d.
e.
When there is more than one nozzle, the installation position should be as symmetrical as possible. (1)bzxz.net
The minimum distance from the center line of the nozzle to the air duct is 1.5D. When multiple nozzles are used at the same time, the distance between the axes of any two nozzles should not be less than 3 times the diameter of the largest nozzle throat.
3.3.2.2 During the test, the static pressure of the air inlet chamber should be kept at 0Pa and remain unchanged throughout the test. 3.3.2.3 Tests with different air volumes should ensure that the wind speed passing through the nozzle throat is within 15~35m/s. 3.3.2.4
Calculation of air volume
Q - CA. V2ApVT
(2)
977
Where: Q-
Air flow, m\/s;
C= 0.99
A nozzle throat area, m°;
Ap
Static pressure difference before and after the nozzle, Pa;| |tt||Specific volume of air, m2/kg
JB/T 6914--93
W
101325
(1+α)p|| tt||V--specific volume of air at dry and bulb temperatures at the nozzle inlet and standard atmospheric pressure, m\/kg dry air: atmospheric pressure in the test, Pa;
Content of air at the nozzle inlet Humidity, kg/kg dry air. 3.3.3 Refrigeration capacity test
(3)
3.3.3.1 The refrigeration capacity test method is specified as the evaporator side air flame difference method, by measuring the value of the air entering the evaporator and leaving the evaporator. The air volume determines the cooling capacity.
3.3.3.2 The test conditions require the following:
a.
The cooling capacity test can be conducted simultaneously with the air flow test. After the system is assembled, the tightness of the piping system should be checked and there should be no leakage of refrigerant. b.
Use a 500V insulation resistance meter to measure the insulation resistance of the charged parts to the non-charged metal parts. The insulation resistance shall not be less than 2Mn. c.
The test voltage between the live parts and non-charged metal parts of the air conditioner is 500V, and the test time is 1 minute. There should be no flashover or breakdown during the test.
3.3.3.3 During the test, there should be no frost on the evaporator surface, no condensed water on the evaporator shell, and no condensed water blown out from the fan outlet. 3.3.3.4 The test should start recording data after the system reaches sufficient thermal balance (reaching sufficient thermal balance means that the test conditions parameters reach and meet all the provisions of Article 3.1).
3.3.3.5 Start recording after determining the stable state for no less than 30 minutes. The recording time should be no less than 1 hour and no less than four sets of data. The arithmetic mean of the four sets of data is used in the calculation. 3.3.3.6 Calculation of cooling capacity
q = Q(h - ha)/[V'(1 + a)] ..In the formula: q
Q
h,|| tt||- Refrigeration capacity, W,
Air flow, m\/s;
Evaporator inlet air melting value, J/kg, lower air; ha-
Evaporator Melting value of outlet air, J/kg, dry air; - Specific volume of air, m2/kg;
Moisture content of air at the nozzle entrance, kg/kg dry air. 3.3.3.7 See Appendix A (reference part) for the test data recording form. 3.3.4 Input power test
3.3.4.1
The input power test can be conducted simultaneously with the cooling capacity test. 3.3.4.2
regulations.
(4)
When conducting the input power test alone, it shall be carried out under the working conditions specified in Article 3.1, and shall meet the requirements of 3.3.4.3 of Articles 3.3.3.4 and 3.3.3.5 using test input When testing the input power using the shaft power method, the belt transmission efficiency is specified as 1. When measuring the power input of the drive motor, a motor with known motor efficiency should be used and converted into shaft input power. 3.3.5 Noise test
In addition to sound pressure level testing in accordance with the provisions of JB4330 on instruments and meters, the noise test should also comply with the following regulations. 3.3.5.1 The terminal voltage of the fan during the test should meet the requirements of Article 3.1.4. Systems with air volume adjustment switches should be tested at the maximum air volume.
978
3.3.5.2 The installation location is specified as follows:
a.
h.
C.
JB/T6914-- 93
When the evaporator and fan installed in the car room are integrated, install them according to Figure 4. 45
?
777777777777
Figure 4
The fan and When the evaporator is installed separately, install it according to Figure 5 and Figure 6. ?
@
45°
Figure 5
②?
45
@
Condenser with fan , install according to Figure 7
Im
@d
H8
Figure 6
@a
Figure 7
8
979
Test unit
Manufacturer
Name
Compressor speed
Compressor
Evaporator| |tt||Condenser
Liquid receiver
Test results
Notes
Project
Compressor driving power
Compressor Ambient temperature
Fan voltage
Fan current
Fan outlet static pressure
Inlet air dry bulb temperature
Inlet air wet bulb temperature
Exit air dry bulb temperature
Exit air wet bulb temperature
Pressure difference before and after the nozzle
Inlet air dry bulb temperature
Facing wind speed
Fan outlet static pressure
Fan input voltage
Fan input current
Ambient temperature
Refrigerating capacity
Energy efficiency ratio COP
Evaporator air volume|| tt||Exhaust pressure
Suction pressure
Suction temperature
Note: Nozzle quantity:
Diameter
mm:
Additional instructions:
JB/T 6914—93
Appendix A
Automotive air conditioner test record sheet
(reference)
Product model|| tt||rated voltage
unit
r/min
kw
C
V
A
Pa| |tt||m/s
Pa
V
A
C
W
W/w
m/h
MPa
Test date:
Test person:
This standard is proposed and managed by Hefei General Machinery Research Institute of the Ministry of Machinery Industry. This standard is drafted by Hefei General Machinery Research Institute. The main drafters of this standard: Fan Gaoding and Wang Jiagui. 980
rated cooling capacity
rated current
time
average
e.
When there is more than one nozzle, the installation position should be as symmetrical as possible. (1)
The minimum distance from the center line of the nozzle to the air duct is 1.5D. When multiple nozzles are used at the same time, the distance between the axes of any two nozzles should not be less than 3 times the diameter of the largest nozzle throat.
3.3.2.2 During the test, the static pressure of the air inlet chamber should be kept at 0Pa and remain unchanged throughout the test. 3.3.2.3 Tests with different air volumes should ensure that the wind speed passing through the nozzle throat is within 15~35m/s. 3.3.2.4
Calculation of air volume
Q - CA. V2ApVT
(2)
977
Where: Q-
Air flow, m\/s;
C= 0.99
A nozzle throat area, m°;
Ap
Static pressure difference before and after the nozzle, Pa;| |tt||Specific volume of air, m2/kg
JB/T 6914--93
W
101325
(1+α)p|| tt||V--specific volume of air at dry and bulb temperatures at the nozzle inlet and standard atmospheric pressure, m\/kg dry air: atmospheric pressure in the test, Pa;
Content of air at the nozzle inlet Humidity, kg/kg dry air. 3.3.3 Refrigeration capacity test
(3)
3.3.3.1 The refrigeration capacity test method is specified as the evaporator side air flame difference method, by measuring the value of the air entering the evaporator and leaving the evaporator. The air volume determines the cooling capacity.
3.3.3.2 The test conditions require the following:
a.
The cooling capacity test can be conducted simultaneously with the air flow test. After the system is assembled, the tightness of the piping system should be checked and there should be no leakage of refrigerant. b.
Use a 500V insulation resistance meter to measure the insulation resistance of the charged parts to the non-charged metal parts. The insulation resistance shall not be less than 2Mn. c.
The test voltage between the live parts and non-charged metal parts of the air conditioner is 500V, and the test time is 1 minute. There should be no flashover or breakdown during the test.
3.3.3.3 During the test, there should be no frost on the evaporator surface, no condensed water on the evaporator shell, and no condensed water blown out from the fan outlet. 3.3.3.4 The test should start recording data after the system reaches sufficient thermal balance (reaching sufficient thermal balance means that the test conditions parameters reach and meet all the provisions of Article 3.1).
3.3.3.5 Start recording after determining the stable state for no less than 30 minutes. The recording time should be no less than 1 hour and no less than four sets of data. The arithmetic mean of the four sets of data is used in the calculation. 3.3.3.6 Calculation of cooling capacity
q = Q(h - ha)/[V'(1 + a)] ..In the formula: q
Q
h,|| tt||- Refrigeration capacity, W,
Air flow, m\/s;
Evaporator inlet air melting value, J/kg, lower air; ha-
Evaporator Melting value of outlet air, J/kg, dry air; - Specific volume of air, m2/kg;
Moisture content of air at the nozzle entrance, kg/kg dry air. 3.3.3.7 See Appendix A (reference part) for the test data recording form. 3.3.4 Input power test
3.3.4.1
The input power test can be conducted simultaneously with the cooling capacity test. 3.3.4.2
regulations.
(4)
When conducting a separate input power test, it shall be carried out according to the working conditions specified in Article 3.1, and shall meet the test input in 3.3.4.3 of Articles 3.3.3.4 and 3.3.3.5. When testing the input power using the shaft power method, the belt transmission efficiency is specified as 1. When measuring the power input of the drive motor, a motor with known motor efficiency should be used and converted into shaft power input. 3.3.5 Noise test
In addition to sound pressure level testing in accordance with the provisions of JB4330 on instruments and meters, the noise test should also comply with the following regulations. 3.3.5.1 The terminal voltage of the fan during the test should meet the requirements of Article 3.1.4. Systems with air volume adjustment switches should be tested at the maximum air volume.
978
3.3.5.2 The installation location is specified as follows:
a.
h.
C.
JB/T6914-- 93
When the evaporator and fan installed in the car room are integrated, install them according to Figure 4. 45
?
777777777777
Figure 4
The fan and When the evaporator is installed separately, install it according to Figure 5 and Figure 6. ?
@
45°
Figure 5
②?
45
@
Condenser with fan , install according to Figure 7
Im
@d
H8
Figure 6
@a
Figure 7
8
979
Test unit
Manufacturer
Name
Compressor speed
Compressor
Evaporator| |tt||Condenser
Liquid receiver
Test results
Notes
Project
Compressor driving power
Compressor Ambient temperature
Fan voltage
Fan current
Fan outlet static pressure
Inlet air dry bulb temperature
Inlet air wet bulb temperature
Outlet air dry bulb temperature
Outlet air wet bulb temperature
Pressure difference before and after the nozzle
Inlet air dry bulb temperature
Facing wind speed
Fan outlet static pressure
Fan input voltage
Fan input current
Ambient temperature
Refrigerating capacity
Energy efficiency ratio COP
Evaporator air volume|| tt||Exhaust pressure
Suction pressure
Suction temperature
Note: Nozzle quantity:
Diameter
mm:
Additional instructions:
JB/T 6914—93
Appendix A
Automotive air conditioner test record sheet
(reference)
Product model|| tt||rated voltage
unit
r/min
kw
C
V
A
Pa| |tt||m/s
Pa
V
A
C
W
W/w
m/h
MPa
Test date:
Test person:
This standard is proposed and managed by Hefei General Machinery Research Institute of the Ministry of Machinery Industry. This standard is drafted by Hefei General Machinery Research Institute. The main drafters of this standard: Fan Gaoding and Wang Jiagui. 980
rated cooling capacity
rated current
time
average
e.
When there is more than one nozzle, the installation position should be as symmetrical as possible. (1)
The minimum distance from the center line of the nozzle to the air duct is 1.5D. When multiple nozzles are used at the same time, the distance between the axes of any two nozzles should not be less than 3 times the diameter of the largest nozzle throat.
3.3.2.2 During the test, the static pressure of the air inlet chamber should be kept at 0Pa and remain unchanged throughout the test. 3.3.2.3 Tests with different air volumes should ensure that the wind speed passing through the nozzle throat is within 15~35m/s. 3.3.2.4
Calculation of air volume
Q - CA. V2ApVT
(2)
977
Where: Q-
Air flow, m\/s;
C= 0.99
A nozzle throat area, m°;
Ap
Static pressure difference before and after the nozzle, Pa;| |tt||Specific volume of air, m2/kg
JB/T 6914--93
W
101325
(1+α)p|| tt||V--specific volume of air at dry and bulb temperatures at the nozzle inlet and standard atmospheric pressure, m\/kg dry air: atmospheric pressure in the test, Pa;
Content of air at the nozzle inlet Humidity, kg/kg dry air. 3.3.3 Refrigeration capacity test
(3)
3.3.3.1 The refrigeration capacity test method is specified as the evaporator side air flame difference method, by measuring the value of the air entering the evaporator and leaving the evaporator. The air volume determines the cooling capacity.
3.3.3.2 The test conditions require the following:
a.
The cooling capacity test can be conducted simultaneously with the air flow test. After the system is assembled, the tightness of the piping system should be checked and there should be no leakage of refrigerant. b.
Use a 500V insulation resistance meter to measure the insulation resistance of the charged parts to the non-charged metal parts. The insulation resistance shall not be less than 2Mn. c.
The test voltage between the live parts and non-charged metal parts of the air conditioner is 500V, and the test time is 1 minute. There should be no flash d.
network and breakdown during the test.
3.3.3.3 During the test, there should be no frost on the evaporator surface, no condensed water on the evaporator shell, and no condensed water blown out from the fan outlet. 3.3.3.4 The test should start recording data after the system reaches sufficient thermal balance (reaching sufficient thermal balance means that the test conditions parameters reach and meet all the provisions of Article 3.1).
3.3.3.5 Start recording after determining the stable state for no less than 30 minutes. The recording time should be no less than 1 hour and no less than four sets of data. The arithmetic mean of the four sets of data is used in the calculation. 3.3.3.6 Calculation of cooling capacity
q = Q(h - ha)/[V'(1 + a)] ..In the formula: q
Q
h,|| tt||- Refrigeration capacity, W,
Air flow, m\/s;
Evaporator inlet air melting value, J/kg, lower air; ha-
Evaporator Melting value of outlet air, J/kg, dry air; - Specific volume of air, m2/kg;
Moisture content of air at the nozzle entrance, kg/kg dry air. 3.3.3.7 See Appendix A (reference part) for the test data recording form. 3.3.4 Input power test
3.3.4.1
The input power test can be conducted simultaneously with the cooling capacity test. 3.3.4.2
regulations.
(4)
When conducting the input power test alone, it shall be carried out under the working conditions specified in Article 3.1, and shall meet the requirements of 3.3.4.3 of Articles 3.3.3.4 and 3.3.3.5 using test input When testing the input power using the shaft power method, the belt transmission efficiency is specified as 1. When measuring the power input of the drive motor, a motor with known motor efficiency should be used and converted into shaft power input. 3.3.5 Noise test
In addition to sound pressure level testing in accordance with the provisions of JB4330 on instruments and meters, the noise test should also comply with the following regulations. 3.3.5.1 The terminal voltage of the fan during the test should meet the requirements of Article 3.1.4. Systems with air volume adjustment switches should be tested at the maximum air volume.
978
3.3.5.2 The installation location is specified as follows:
a.
h.
C.
JB/T6914-- 93
When the evaporator and fan installed in the car room are integrated, install them according to Figure 4. 45
?
777777777777
Figure 4
The fan and When the evaporator is installed separately, install it according to Figure 5 and Figure 6. ?
@
45°
Figure 5
②?
45
@
Condenser with fan , install according to Figure 7
Im
@d
H8
Figure 6
@a
Figure 7
8
979
Test unit
Manufacturer
Name
Compressor speed
Compressor
Evaporator| |tt||Condenser
Liquid receiver
Test results
Notes
Project
Compressor driving power
Compressor Ambient temperature
Fan voltage
Fan current
Fan outlet static pressure
Inlet air dry bulb temperature
Inlet air wet bulb temperature
Outlet air dry bulb temperature
Outlet air wet bulb temperature
Pressure difference before and after the nozzle
Inlet air dry bulb temperature
Facing wind speed
Fan outlet static pressure
Fan input voltage
Fan input current
Ambient temperature
Refrigerating capacity
Energy efficiency ratio COP
Evaporator air volume|| tt||Exhaust pressure
Suction pressure
Suction temperature
Note: Nozzle quantity:
Diameter
mm:
Additional instructions:
JB/T 6914—93
Appendix A
Automotive air conditioner test record sheet
(reference)
Product model|| tt||rated voltage
unit
r/min
kw
C
V
A
Pa| |tt||m/s
Pa
V
A
C
W
W/w
m/h
MPa
Test date:
Test person:
This standard is proposed and managed by Hefei General Machinery Research Institute of the Ministry of Machinery Industry. This standard is drafted by Hefei General Machinery Research Institute. The main drafters of this standard: Fan Gaoding and Wang Jiagui. 980
rated cooling capacity
rated current
time
average
3.1 The cooling capacity test method is specified as the evaporator side air flame difference method. The cooling capacity is determined by measuring the value and air volume of the air entering and leaving the evaporator.
3.3.3.2 The test conditions require the following:
a.
The cooling capacity test can be conducted simultaneously with the air flow test. After the system is assembled, the tightness of the piping system should be checked and there should be no leakage of refrigerant. b.
Use a 500V insulation resistance meter to measure the insulation resistance of the charged parts to the non-charged metal parts. The insulation resistance shall not be less than 2Mn. c.
The test voltage between the live parts and non-charged metal parts of the air conditioner is 500V, and the test time is 1 minute. There should be no flash d.
network and breakdown during the test.
3.3.3.3 During the test, there should be no frost on the evaporator surface, no condensed water on the evaporator shell, and no condensed water blown out from the fan outlet. 3.3.3.4 The test should start recording data after the system reaches sufficient thermal balance (reaching sufficient thermal balance means that the test conditions parameters reach and meet all the provisions of Article 3.1).
3.3.3.5 Start recording after determining the stable state for no less than 30 minutes. The recording time should be no less than 1 hour and no less than four sets of data. The arithmetic mean of the four sets of data is used in the calculation. 3.3.3.6 Calculation of cooling capacity
q = Q(h - ha)/[V'(1 + a)] ..In the formula: q
Q
h,|| tt||- Refrigeration capacity, W,
Air flow, m\/s;
Evaporator inlet air melting value, J/kg, lower air; ha-
Evaporator Melting value of outlet air, J/kg, dry air; - Specific volume of air, m2/kg;
Moisture content of air at the nozzle entrance, kg/kg dry air. 3.3.3.7 See Appendix A (reference part) for the test data recording form. 3.3.4 Input power test
3.3.4.1
The input power test can be conducted simultaneously with the cooling capacity test. 3.3.4.2
regulations.
(4)
When conducting the input power test alone, it shall be carried out under the working conditions specified in Article 3.1, and shall meet the requirements of 3.3.4.3 of Articles 3.3.3.4 and 3.3.3.5 using test input When testing the input power using the shaft power method, the belt transmission efficiency is specified as 1. When measuring the power input of the drive motor, a motor with known motor efficiency should be used and converted into shaft power input. 3.3.5 Noise test
In addition to sound pressure level testing in accordance with the provisions of JB4330 on instruments and meters, the noise test should also comply with the following regulations. 3.3.5.1 The terminal voltage of the fan during the test should meet the requirements of Article 3.1.4. Systems with air volume adjustment switches should be tested at the maximum air volume.
978
3.3.5.2 The installation location is specified as follows:
a.
h.
C.
JB/T6914-- 93
When the evaporator and fan installed in the car room are integrated, install them according to Figure 4. 45
?
777777777777
Figure 4
The fan and When the evaporator is installed separately, install it according to Figure 5 and Figure 6. ?
@
45°
Figure 5
②?
45
@
Condenser with fan , install according to Figure 7
Im
@d
H8
Figure 6
@a
Figure 7
8
979
Test unit
Manufacturer
Name
Compressor speed
Compressor
Evaporator| |tt||Condenser
Liquid receiver
Test results
Notes
Project
Compressor driving power
Compressor Ambient temperature
Fan voltage
Fan current
Fan outlet static pressure
Inlet air dry bulb temperature
Inlet air wet bulb temperature
Outlet air dry bulb temperature
Outlet air wet bulb temperature
Pressure difference before and after the nozzle
Inlet air dry bulb temperature
Facing wind speed
Fan outlet static pressure
Fan input voltage
Fan input current
Ambient temperature
Refrigerating capacity
Energy efficiency ratio COP
Evaporator air volume|| tt||Exhaust pressure
Suction pressure
Suction temperature
Note: Nozzle quantity:
Diameter
mm:
Additional instructions:
JB/T 6914—93
Appendix A
Automotive air conditioner test record sheet
(reference)
Product model|| tt||rated voltage
unit
r/min
kw
C
V
A
Pa| |tt||m/s
Pa
V
A
C
W
W/w
m/h
MPa
Test date:
Test person:
This standard is proposed and managed by Hefei General Machinery Research Institute of the Ministry of Machinery Industry. This standard is drafted by Hefei General Machinery Research Institute. The main drafters of this standard: Fan Gaoding and Wang Jiagui. 980
rated cooling capacity
rated current
time
average
3.1 The cooling capacity test method is specified as the evaporator side air flame difference method, and the cooling capacity is determined by measuring the value and air volume of the air entering and leaving the evaporator.
3.3.3.2 The test conditions are as follows:
a.
The cooling capacity test can be carried out simultaneously with the air flow test. After the system is assembled, the sealing of the pipeline system should be checked, and there should be no leakage of refrigerant. b.
Use a 500V insulation resistance meter to measure the insulation resistance of the live parts to the non-live metal parts, and the insulation resistance shall not be less than 2Mn. c.
The test voltage between the live parts and the non-live metal parts of the air conditioner is 500V, and the test time is 1min. There should be no flashover and breakdown during the test.
3.3.3.3 During the test, there should be no frost on the evaporator surface, and there should be no condensation on the evaporator shell and condensation blown out from the fan outlet. 3.3.3.4 The test should start recording data after the system reaches full thermal equilibrium (reaching full thermal equilibrium means that the test operating condition parameters reach and meet all the requirements of Article 3.1).
3.3.3.5 Recording should start after determining the stable state for no less than 30 minutes, and the recording time should be no less than 1 hour and no less than four sets of data. The arithmetic mean of the four sets of data is used for calculation. 3.3.3.6 Calculation of cooling capacity
q = Q(h - ha)/[V'(1 + a)] .. In the formula: q
Q
h,
-cooling capacity, W,
air flow rate, m\/s;
evaporator inlet air melting value, J/kg, lower air; ha-
evaporator outlet air melting value, J/kg, dry air; -specific volume of air, m2/kg;
moisture content of air at the nozzle inlet, kg/kg dry air. 3.3.3.7 The test data recording form is shown in Appendix A (reference). 3.3.4 Power input test
3.3.4.1
The power input test can be carried out simultaneously with the cooling capacity test. 3.3.4.2
Regulations.
(4)
When the power input test is carried out alone, it shall be carried out according to the working conditions specified in Article 3.1, and shall meet the requirements of Articles 3.3.3.4 and 3.3.3.5. 3.3.4.3 When the input power is tested by the method of testing the input shaft power, the belt transmission efficiency is specified to be 1. When measuring the input power of the drive motor, a motor with a known motor efficiency shall be used and converted into shaft input power. 3.3.5 Noise test
In addition to testing the sound pressure level according to the provisions of the relevant instruments and meters in JB4330, the noise test shall also comply with the following provisions. 3.3.5.1 The terminal voltage of the fan during the test shall meet the requirements of Article 3.1.4. The system with air volume adjustment switch shall be tested under the condition of maximum air volume.
978
3.3.5.2 The installation position is specified as follows:
a.
h.
C.
JB/T6914--93
When the evaporator and fan installed in the vehicle compartment are integrated, they shall be installed according to Figure 445
?
777777777777
Figure 4
When the fan and evaporator are installed separately, they shall be installed according to Figures 5 and 6. ?
@
45°
Figure 5
②?
45
@
Condenser with fan, installed according to Figure 7
Im
@d
H8
Figure 6
@a
Figure 7
8
979
Test unit
Manufacturer
Name
Compressor speed
Compressor
Evaporator
Condenser
Liquid receiver
Test results
Notes
Item
Compressor driving power
Compressor ambient temperature
Fan voltage|| tt||Fan current
Fan outlet static pressure
Inlet air dry bulb temperature
Inlet air wet bulb temperature
Outlet air dry bulb temperature
Outlet air wet bulb temperature
Pressure difference before and after nozzle
Inlet air dry bulb temperature
Face wind speed
Fan outlet static pressure
Fan input voltage
Fan input current
Ambient temperature
Cooling capacity
Energy efficiency ratio COP
Evaporator air volume
Exhaust pressure
Suction pressure
Suction temperature
Note: Number of nozzles:
Diameter
mm:
Additional instructions:
JB/T 6914—93
Appendix A
Automobile air conditioner test record
(reference)
Product model
Rated voltage
Unit
r/min
kw
C
V
A
Pa
m/s
Pa
V
A
C
W
W/w
m/h
MPa
Test date:
Test personnel:
This standard is proposed and managed by the Hefei General Machinery Research Institute of the Ministry of Machinery Industry. This standard is drafted by the Hefei General Machinery Research Institute. The main drafters of this standard are Fan Gaoding and Wang Jiagui. 980
Rated cooling capacity
Rated current
Time
Average
C.
JB/T6914--93
When the evaporator and fan installed in the car room are integrated, install them according to Figure 4 45
?||tt ||777777777777
Figure 4
When the fan and evaporator are installed separately, install them according to Figure 5 and Figure 6. ?
@
45°
Figure 5
②?
45
@
Condenser with fan , install according to Figure 7
Im
@d
H8
Figure 6
@a
Figure 7
8
979
Test unit
Manufacturer
Name
Compressor speed
Compressor
Evaporator| |tt||Condenser
Liquid receiver
Test results
Notes
Project
Compressor driving power
Compressor Ambient temperature
Fan voltage
Fan current
Fan outlet static pressure
Inlet air dry bulb temperature
Inlet air wet bulb temperature
Exit air dry bulb temperature
Exit air wet bulb temperature
Pressure difference before and after the nozzle
Inlet air dry bulb temperature
Facing wind speed
Fan outlet static pressure
Fan input voltage
Fan input current
Ambient temperature
Refrigerating capacity
Energy efficiency ratio COP
Evaporator air volume|| tt||Exhaust pressure
Suction pressure
Suction temperature
Note: Nozzle quantity:
Diameter
mm:
Additional instructions:
JB/T 6914—93
Appendix A
Automotive air conditioner test record sheet
(reference)
Product model|| tt||rated voltage
unit
r/min
kw
C
V
A
Pa| |tt||m/s
Pa
V
A
C
W
W/w
m/h
MPa
Test date:
Test person:
This standard is proposed and managed by Hefei General Machinery Research Institute of the Ministry of Machinery Industry. This standard is drafted by Hefei General Machinery Research Institute. The main drafters of this standard: Fan Gaoding and Wang Jiagui. 980
rated cooling capacity
rated current
time
average
C.
JB/T6914--93
When the evaporator and fan installed in the car room are integrated, install them according to Figure 4 45
?||tt ||777777777777
Figure 4
When the fan and evaporator are installed separately, install them according to Figure 5 and Figure 6. ?
@
45°
Figure 5
②?
45
@
Condenser with fan , install according to Figure 7
Im
@d
H8
Figure 6
@a
Figure 7
8
979
Test unit
Manufacturer
Name
Compressor speed
Compressor
Evaporator| |tt||Condenser
Liquid receiver
Test results
Notes
Project
Compressor driving power
Compressor Ambient temperature
Fan voltage
Fan current
Fan outlet static pressure
Inlet air dry bulb temperature
Inlet air wet bulb temperature
Outlet air dry bulb temperature
Outlet air wet bulb temperature
Pressure difference before and after the nozzle
Inlet air dry bulb temperature
Facing wind speed
Fan outlet static pressure
Fan input voltage
Fan input current
Ambient temperature
Refrigerating capacity
Energy efficiency ratio COP
Evaporator air volume|| tt||Exhaust pressure
Suction pressure
Suction temperature
Note: Nozzle quantity:
Diameter
mm:
Additional instructions:
JB/T 6914—93
Appendix A
Automotive air conditioner test record sheet
(reference)
Product model|| tt||rated voltage
unit
r/min
kw
C
V
A
Pa| |tt||m/s
Pa
V
A
C
W
W/w
m/h
MPa
Test date:
Test person:
This standard is proposed and managed by Hefei General Machinery Research Institute of the Ministry of Machinery Industry. This standard is drafted by Hefei General Machinery Research Institute. The main drafters of this standard: Fan Gaoding and Wang Jiagui. 980
rated cooling capacity
rated current
time
average
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