Some standard content:
GB/T9098—1996
This standard is used for performance type inspection of fully enclosed motor-compressors for refrigerators. This standard is a revision of GB9098--88 and will replace GB9098--88. In this standard, some of the test methods adopt the relevant contents of ISO917 and DIN8974-1975, DIN8978--1973 and DIN8979---1973. The limit values specified in the technical requirements of this standard are formulated based on the current level of my country's refrigerator compressor industry. This standard takes into account the development of compressors for CFC substitutes and the trend of refrigerators to large volumes, and amends the unreasonable contents of GB9098-88.
This standard is proposed by the China Light Industry Federation.
This standard is under the jurisdiction of the National Technical Committee for Standardization of Household Electrical Appliances. This standard is drafted by the China Household Electrical Appliances Research Institute and the Guangzhou Electric Appliance Science Research Institute. The drafting units of this standard include: Chongqing Changfeng Machinery Factory, Huangshi Refrigerator Compressor Factory, Zhejiang Jiaxing Gasibella Compressor Co., Ltd., Xi'an Far East Company of China Aviation Industry Corporation, Shanghai Refrigerator Compressor Co., Ltd., Wanbao Group Refrigeration Machinery Manufacturing Industry Company, Shanghai Xinxin Machinery Factory, Xi'an Dongfang Machinery Factory, Jiangxi Jingdezhen Huayi Compressor Factory, Yuhuan County Refrigerator Compressor Factory. The drafters of this standard include: Zhao Jiarui, Liu, Duan Yansheng, Li Huizhong, Huang Binggeng, Wu Minhua, Guan Mingdao, Zhou Youxin, Linde, etc. 278
1 Scope
National Standard of the People's Republic of China
Hermetic motor-compressors for refrigeratorsGB/T9098---1996
Replaces GB 9098--88
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage requirements of fully enclosed motor-compressors for refrigerators. The safety requirements for its compressor can be found in GB4706.17 "Special Requirements for Safety Motor Compressors for Household and Similar Electrical Appliances".
This standard applies to fully enclosed motor-compressors (hereinafter referred to as compressors) used in low back pressure household electric refrigeration appliances whose refrigerant is R12[CCI,F. or CFC substitutes with similar thermal properties, and whose nominal cooling capacity does not exceed 400W under the working conditions specified in this standard, including reciprocating piston compressors and rotary compressors. 2 Cited standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. At the time of publication of the standard, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB4706.17--88 Safety of household and similar electrical appliances Particular requirements for motor-compressors GB577386 Performance test methods for positive displacement refrigeration compressors GB4214--84 Determination of sound power level of household appliances General rules for packaging of household appliances
GB 1019-89
Count sampling procedures and sampling tables for batch inspection (applicable to inspection of continuous batches) GB 2828--- 87
GB2829-87 Count sampling procedures and sampling tables for periodic inspection (applicable to inspection of production process stability) 3 Terminology
3.1 Horizontal fully enclosed motor-compressor A fully enclosed motor-compressor whose motor shaft is parallel to the ground after the motor-compressor is installed as specified. 3.2 Vertical fully enclosed motor-compressor A fully enclosed motor-compressor whose motor shaft is vertical to the ground after the motor-compressor is installed as specified. 3.3 Coefficient of performance (cop)
The ratio of the cooling capacity to the power consumed by the refrigeration when the compressor is connected to the refrigeration system, unit: W/W. 4 Product classification
4.1 Classification by structural type
4.1.1 Fully enclosed motor-driven reciprocating type 4.1.2 Fully enclosed motor-driven rotary type * Low back pressure type refers to the evaporation temperature range of -35℃ (lower if necessary) to -15℃. Approved by the State Bureau of Technical Supervision on September 5, 1996 and implemented on September 1, 1997
4.2 Classification by installation form
4.2.1 Horizontal compressor
4.2.2 Vertical compressor
4.3 Method of indicating specifications and models
1) Fully enclosed type: indicated by Q.
2) Low back pressure type: indicated by D,
GB/T 9098---1996
6) Improved design serial number
5) Compressor characteristic code
) Compressor cylinder nominal working volume
3) Sports type
--2) Low back pressure type
1) Fully enclosed type
3) Sports type: Rotary compressors are indicated by X; in the past, piston compressors were not marked with this item4) Compressor gas characteristic nominal volume: The unit is cm". The effective digits are taken to the decimal place, without a decimal point5) Compressor characteristic code: - Generally, it is indicated by one letter, and no more than two letters are allowed, such as high-efficiency compression machine (installed also, false voltage start compressor is indicated. Ordinary compressors are not indicated.6) Improved design serial number: According to A, BC are arranged in order. Example 1: QD45GLB
Fully enclosed, high-efficiency reciprocating compressor for low back pressure and low voltage start. Its cylinder nominal working volume is 4.5cm2, the second improved design.
Example 2: QDX36
Fully enclosed, rotary compressor for low back pressure. Its cylinder nominal working volume is 3.6Cm. Original design 1 Compressors with a coefficient of performance (c.0.p) greater than 1.2 times the limit specified in Table 1 or greater than 1.15 times the limit specified in Table 2 are considered to be low-efficiency compressors. 2 Compressors that can start at a voltage equal to or lower than 0.75 times the rated voltage are considered to be low-voltage start compressors. 5 Technical requirements
5 .1 The compressor shall be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. 5.2 The power supply of the compressor shall be single-phase AC, the rated voltage shall not exceed 250V, the rated frequency shall not exceed 60Hz, and the normal operating environment temperature of the compressor shall be 10C to 43C.
5.3 Performance requirements
Note: The technical requirements of the following clauses are only applicable to low-voltage standard compressors with single-phase AC, rated power of 220V, rated frequency of 50Hz, and refrigerant R13. Compressors of other voltages and frequencies and compressors using CFC substitutes are for reference only. 5.3.1 Refrigeration capacity and coefficient of performance
The test shall be carried out according to the methods specified in Articles 6.2 and 6.4. Under the test temperature conditions specified in Table 9, the measured super-cooling capacity shall not be less than 95% of the product value.
The performance coefficient (c..p) of reciprocating compressors shall not be less than the limit value 28 specified in Table 1.
Nominal cylinder working volume
Performance coefficient
GB/T9098·1996
The performance coefficient (c.0.p) of rotary compressors shall not be less than the limit value specified in Table 2. Table 2
Nominal cylinder working volume
Performance coefficient (cop)
>2.5～3.2
≥3.2～4.6
The minimum limit value of the performance coefficient (c.0.p) of low-voltage starting reciprocating piston compressors is allowed to be reduced by 0.05 compared with the corresponding limit value in Table 1.
5.3.2 Starting performance
The test is carried out according to the method specified in Article 6.3. The compressor should be able to start normally after three consecutive power-on tests. The overload protection device is allowed to trip twice for each power-on.
5.3.3 Input power and T working current
The test is carried out according to the method specified in Article 6.4. The actual measured input power value should not exceed 115% of the rated value, and the actual measured working current value should not exceed 110% of the rated value.
5.3.4 Motor winding temperature
The test is carried out according to the method specified in Article 6.5. The operating winding temperature: Class A insulation should not exceed 105°C;
Class E insulation should not exceed 120°C;
Class B insulation should not exceed 130°C;
Class F insulation should not exceed 155°C;
Class H insulation should not exceed 175.
5.3.5 Shell temperature
The test is carried out according to the method specified in Article 6.6. The outer surface temperature of the specified measuring point: The compressor shell is at the low pressure (evaporation pressure) end, and it should not exceed 95°C. The temperature of the compressor housing at the high pressure (condensing pressure) end should not exceed 115°C. 5.3.6 Noise
There should be no abnormal sound when the compressor is running.7, the sound power level noise value of the reciprocating compressor (A-weighted) shall not be greater than the limit value specified in Table 3.
Nominal working volume of cylinder
(A-weighted) sound power level
Noise value, dB
GB/T 9098.- 1996
The (A-weighted) sound power level noise value of the rotary compressor shall not be greater than the limit value specified in Table 4. Table 4
Nominal working volume of air
(A-weighted) sound power level
Sound value, dB
5.3.7 Vibration
3.2～4.6
The maximum value of the normal vibration acceleration measured at each measuring point of the reciprocating compressor shall not be greater than the limit value specified in Table 5
Nominal cylinder working volume
Normal maximum vibration
Acceleration (effective value),
Note: For high-efficiency compressors, if the coefficient of performance (cOP) exceeds the limit value specified by the largest gear (or second gear) of the nominal cylinder working volume, the (A-weighted) sound power level noise value and the normal maximum vibration acceleration shall also be required according to the noise or perturbation limit value specified by the largest gear (or second gear) of the nominal cylinder working volume.
For rotary compressors (without damping spring structure inside the shell), the maximum value of normal vibration acceleration measured at each specified measuring point shall not exceed the limit value specified in Table 6.
Nominal displacement of cylinder
Maximum normal vibration acceleration (effective value), m/s
5.3.8 Air tightness of compressor shell
23. 2~4. 6
>4.6~-5.5
Test according to the method specified in Article 6.9. The shell (including parts welded to the shell) shall not be broken or leaked. 5.3.9 Residual moisture content of the whole machine
Test according to the method specified in Article 6.10. The residual moisture content of the whole machine shall not exceed the limit value specified in Table 6.
Nominal working volume of gas red
Residual moisture content of the whole machine
5.3.10 Impurity content inside the whole machine
4. 2～~7
The test shall be carried out according to the method specified in Article 6.11. The impurity content inside the whole machine shall not exceed 10) mg. 5.3.11 Accelerated life test
The test shall be conducted in accordance with the method specified in Article 6.12. After the test, the cooling capacity shall not drop by more than 5% of the original measured value, and the (A-weighted) sound power level noise value shall not exceed the original measured value by 3dB282
5.3.12 Start-up durability test
GB/T 9098 ---1996
The test shall be conducted in accordance with the method specified in Article 6.13. During or after the test, the compressor shall not have the following faults: a) Mechanical damage to the compressor, the test pressure ratio cannot be maintained; b) Damage to the suspension (or support) spring, causing a significant increase in noise. And causing the compressor to stop or crash; c) Electrical short circuit or open circuit inside the compressor. 5.4 Other technical requirements
5.4.1 The compressor shall be equipped with a suitable overload protection device. 5.4.2
The compressor shall be equipped with a suitable motor starting device. 5.4.3
The compressor should be equipped with suitable vibration reduction devices (such as vibration reduction pads, etc.). 5.4.4
below).
The finished compressor should be sealed with dry nitrogen or Baoqi (solution point with a viscosity of 35 (. The compressor should be filled with refrigeration oil according to the design requirements and the specified oil filling amount. The paint on the compressor surface should be uniform and there should be no defects such as missing paint, scratches, rust spots, etc. 6 Test method
6.1 Test conditions
6.1.1 Ambient temperature
Unless otherwise specified, the ambient temperature for general tests is 20±5°C. 6.1.2 The environment around the tested compressor should be in normal use. For naturally cooled compressors, the ambient air flow rate should not be greater than 0.25m/s; for compressors using fan forced cooling .... For compressors with cooling, the air velocity around them is the air velocity of the compressor under test with a fan in normal working state; for compressors equipped with oil cooling pipes, the lubricating oil shall be cooled according to the provisions of the technical documents, and there shall be no cold or heat sources within 500mm around the compressor:
6.1.3 During the refrigeration capacity test, the voltage fluctuation value and frequency fluctuation value of the test power supply shall not be greater than 1. 6.1.4 The measuring instruments shall be within the effective use period and be accompanied by a calibration certificate. The selection of the measuring instruments and the standard deviation of the measurement shall comply with the provisions of Table 8.
Measurement standard deviation
Measurement category
Temperature measurement| |tt||Pressure measurement
Optional measuring instruments
Glass mercury thermometer
Thermocouple
Resistance overflow meter
Mercury column manometer
Bourdon (tube)
Manometer
Diaphragm pressure gauge
Individual inspection items for type inspection (external inspection)
(1) The standard deviation of the temperature measurement of water or brine in the calorimeter is ± 0.6°C
(2) The standard deviation of the temperature measurement of water in the condenser is ± 0.6°C
(3) The standard deviation of other temperature measurements is 0.3°C|| tt||(1) Suction pressure (absolute force) Its measurement standard is Xie Yingwei Sheng 1 Xing
(2) Other pressures (absolute pressure) Its measurement standard deviation is L2%
Its mandatory inspection items for inspection
Its measurement standard deviation is: 2
Measurement category
Electrical measurement
Refrigerant flow measurement
Cooling water flow measurement
Speed measurement
Time measurement
Mass measurement
Noise measurement
Perturbation measurement
Wind speed measurement
Optional measuring instruments
GB/T 9098-1996
Table 8 (Complete)
Standard deviation for type inspection and
Measurement
Sampling items for factory inspection
Industrial power measuring instruments according to load size and agreement requirements (motor compressors and industrial or precision level indicating instruments
Industrial or precision level cumulative instruments according to load size and agreement requirements
Electric heat calorimeters) The standard deviation of the measurement is ±1%, and the standard deviation of other electrical measurements is
(1) Refrigerant liquid meter and refrigerant liquid flow meter, whose measurement standard deviation is 1%
(2) Refrigerant vapor flow meter, whose measurement standard deviation is 1%
Refrigerant liquid flow meter
Refrigerant vapor flow meter
Liquid meter that measures mass or volume
Liquid flow meter
Speed Counter
Tachometer
Internal optical frequency meter
Fast process (pulse)
Recorder
Stopwatch, etc.
Precision sound level meter, etc.
Vibrometer, etc.
Hot-ball anemometer
Push deviation = 2%
Flow measuring instruments that are not easy to measure should
Conform to the requirements of relevant standards, and the standard deviation of the measurement should be written in the test report|| The standard deviation of cooling water flow measurement is. For flow measuring instruments that are not easy to measure, the uncertainty assessment of flow measurement is carried out according to relevant standards. Its measurement standard deviation is -0.75%. Its measurement standard deviation is ±0.1%. Its measurement standard deviation is -0.2%. Its measurement standard deviation is 1dB, the frequency range is 20 Hz~~12 500 Hz, its measurement standard deviation is ±0.01m/s, the frequency response is 10Hz~1000Hz, its measurement standard deviation is ±2%. Note: Accelerated life test and start-up durability test allow the use of lower-level pressure measuring instruments. 6.2 Refrigeration capacity test method
The mandatory items for factory inspection are
The standard deviation of measurement is 41.5
The standard deviation of measurement is ±0.2%
The test is carried out according to the second refrigerant calorimeter method of Article 3.1 of GB5773. The test conditions shall comply with the provisions of Table 9. When necessary, the refrigerant liquid flow meter method of Article 3.6 of GB5773 or other methods specified in the standard may be used for calibration test. The difference between the main and auxiliary test results shall not exceed 4%.
Condensing temperature
54.4±0.3
6.3 Start-up performance test method
Evaporation temperature
-23.3±0.2
GB/T 9098--1996
Subcooling temperature
32.2±0.3
Suction temperature
Ambient temperature
32, 2
Start-up performance test device with a compressor connected to the high-pressure part of the pipeline with all electrical accessories and an internal volume of at least 50cm (see Figure 1) (before each test, its shut-off valve is pre-adjusted to a suitable position according to the working conditions specified in Article 6.13) Evacuate the system and charge it with an appropriate amount of refrigerant R12. Open the equalizing valve, stop the compressor after running for 5 minutes, adjust the amount of refrigerant charged, so that the system's balance pressure is 0.5MPa (absolute pressure), and close the equalizing valve.
a) Voltage-raising start: The voltage rises to 233V (or 1.06 times the rated voltage), and the shoulder is started three times continuously. After each start-up and entering condition 1. Stop immediately and use the equalizing valve to restore the system to the balance pressure. b) Reduced voltage start: The voltage drops to 187V (or 0.85 times the rated voltage). For low voltage compressors, the voltage drops to 165V (or 0.75 times the rated voltage) and starts three times in a row. After each start-up into working condition, stop immediately and use the equalizing valve to restore the system to the balanced pressure.
For compressors with PTC element starting devices, the stop interval between two starts should be long enough to allow the PTC element to resume the starting function, generally not less than 5 minutes. Discharge pressure gauge
Compressor
6.4 Input power and working current test method Suction pressure gauge
H pressure equalizing valve
P.--0.5MPa
Figure 1 Starting performance test device
+Micro Tour Institute
When measuring the cooling capacity according to Article 6.2, use the ammeter and power meter to measure the input power and working current value of the compressor when it is running under the test temperature conditions
6.5 Motor winding temperature test method
During the cooling capacity measurement according to Article 6.2, complete the measurement of the motor running winding resistance, or after the cooling capacity measurement according to Article 6.2 is completed, complete the measurement of the motor running winding resistance within 15$, and calculate the motor winding resistance according to the following formula: R2
(t, +234.5) - 234. 5
Where: t-operating winding temperature at the end of the test, t; ambient temperature when measuring the cold resistance of the operating winding, C, (the compressor is placed at this temperature for 18 hours); R.-hot resistance of the operating winding at the end of the test, R.-cold resistance of the operating winding at temperature t. 6.6 Shell temperature measurement method
GB/T 9098 --1996
Before the end of the refrigeration capacity measurement specified in Article 6.2, measure the outer surface temperature of the reciprocating compressor at 3cm away from its bottom surface and measure the shell surface temperature of the midpoint (horizontal) or any point (vertical) of the shell cylindrical surface at half the height of the rotary compressor (when measuring, ensure that the sensor is in good contact with the shell surface). 6.7 Noise measurement method
This standard adopts GB4214 as the method for measuring the noise level of the A-weighted sound power level of the compressor. The compressor under test is placed in an environment that meets the test environment requirements of Article 3.1 of GB4214. The test environment is a semi-anechoic chamber. The compressor should be equipped with its own vibration damping pad and placed on a rigid platform (without fixing bolts) in the center of the flat anechoic air floor. The mass of the rigid platform is more than 10 times the mass of the compressor being tested. The compressor is connected to the substitute refrigeration system placed outside the semi-anechoic chamber with a non-rigid connecting pipe (Figure 2 is a recommended substitute refrigeration system). The system is evacuated and filled with refrigerant R12. Operate the compressor, adjust the exhaust pressure and stabilize it at 1.2MPa±0.05MIa, and adjust the suction pressure and stabilize it at 0.15MPa0.01MPa (both are absolute pressures). After the system enters a stable state (the temperature of the compressor shell no longer rises), the A-weighted sound pressure level noise value of each measuring point can be measured according to the provisions of GB4214, the average A-weighted sound pressure level noise value I of the measuring surface can be calculated, and the noise value of the A-weighted sound power level of the compressor can be calculated. Note: For compressors using CFC substitutes, the exhaust pressure is the saturation pressure corresponding to the substitute at 50C+:0.5C, and the suction pressure is the saturation pressure corresponding to the substitute at 20±0.5℃.
Thermostatic Control Water Valve
Cooling Water
Heat Exchanger
Suction Control Valve
Thermostat
Charging Valve
Secondary Refrigerant
Oil Cooler
A is the river air temperature measurement point;
The distance between A and the compressor shell is about 30cm. Equalizing valve
Suction pressure gauge
Intermediate air pipe
High pressure pipe
Compressor
Figure 2 Recommended alternative refrigeration system
6.8 Vibration measurement method
Ball valve
X-pressure control valve
Release measurement
During the noise measurement activity, keep the compressor and the alternative refrigeration system in their working state unchanged, and use a vibration meter to measure the normal vibration acceleration of the specified point
Vibration acceleration measurement point for reciprocating compressor: Cut a cross section at a position half the height of the compressor, and make the X coordinate through the center point along the piston movement direction on the cross section, and make the Y coordinate through the center point perpendicular to the X coordinate, and make the vertical line through the center of the cross section as the Y coordinate, and the three points where the two axes intersect with the outer edge of the compressor as the measuring points. The vibration acceleration measurement point of the rotary compressor is to make a vertical section through the axis of the cylindrical shell and intersect the cylindrical surface of the shell. The midpoint and two points 1/31 away from the midpoint are taken on the intersection line. L is the length of a horizontal rotary compressor or the height of a vertical rotary compressor. 6.9 Test method for air tightness of compressor shell After the compressor shell is filled with dry air (dew point below 35°C) of 1.1MPa (low-pressure end of the compressor shell) or 1.7MPa (high-pressure end of the compressor shell) (both are absolute pressures), it is immersed in a soft water tank with a temperature higher than 15°C for visual inspection for 1min. 6.10 Method for determining the residual moisture content of the whole machine The compressor is placed in a constant temperature drying oven (if the compressor has been filled with protective gas, the protective gas should be released until the pressure is balanced with the ambient pressure). The suction and exhaust pipes are simultaneously connected to the moisture measuring device, as shown in Figure 3. The temperature in the drying oven is adjusted to 125 (soil 5 (In order to shorten the heating time of the compressor, an appropriate amount of heating current is passed through the running winding to make it The winding temperature reaches the temperature inside the box. Start the vacuum pump. When the absolute pressure in the system reaches 200Pa, put the condenser into an ice bucket for cold bath, and then gradually open the stop valve. The test should last for 4 hours. The pressure in the system should not exceed 4Pa after 4 hours. Then shut down the machine. Otherwise, the test is invalid. After shutting down, remove the condenser from the device and seal its mouth. When the temperature of the condenser is equal to the ambient temperature, read (or weigh on an analytical balance) the water content in the tube.
Drying box at constant temperature
Tested press.
Regulator
Stop valve
Vacuum gauge
Figure 3 Test device for residual moisture content of the whole machine
6.11 Method for determining the impurity content inside the whole machine 6 .11.1 Take the required area of 5um porosity filter paper or 0-type mixed fiber resin microporous filter membrane with a pore size of 5um or 5un powder unsintered filter disc, put it in an oven, heat it to 60C~70C, keep it for 30 minutes, weigh the filter disc immediately after taking it out of the oven and record the mass of the filter disc (you can dry the disc from time to time, take one and weigh it), and then immediately put it in a desiccator for storage. 6.11.2 Pour out the refrigeration oil in the compressor in the clean room and filter it with a filter disc of known mass. Then put the filter disc with the filtrate into clean gasoline and soak it for a sufficient time to dilute the refrigeration oil adsorbed by the filter disc. Finally, take out the filter disc with the filtrate, wait for the gasoline to evaporate, put it in an oven and heat it to 60C~70C and keep it. After 30 minutes, weigh. This mass minus the mass of the filter disc is the mass of impurities in the oil. 6.11.3 Pour a lot of F0.8I filtered R11 or R113 or alternative flushing liquid into the compressor body and seal it. Fix the compressor on the flushing device shown in Figure 4, and rotate clockwise for 10 turns and counterclockwise for 10 turns at a speed of - turns per second. Alternate for 100 seconds, pour out the flushing liquid and filter. This flushing and filtering procedure is carried out 3 times in total without changing the filter disc. Then put the filter disc with the filtrate into clean gasoline according to the method in 6.11.2, soak, dry and weigh. Finally, add up the impurities collected from the oil and the shell cleaning to get the impurity content inside the compressor
6.12 Accelerated life test method
GB/T 9098--1996
Tightening bolt
Compressor
-Base
Figure 4 Internal flushing device of compressor
Drive handle
-Rotating bracket
Connect the compressor tested in Articles 6.2 and 6.7 to the substitute refrigeration system (see Figure 2) and operate it continuously under the conditions shown in Table 10. After 500 hours, repeat the tests in Articles 6.2 and 6.7. During operation, forced ventilation cooling is allowed to maintain stable working conditions. When the compressor cannot maintain normal operation under the conditions shown in Table 10, it can be operated continuously under the conditions shown in Table 11. After 1000 hours, repeat the tests in Articles 6.2 and 6.7. During operation, forced ventilation cooling is allowed to maintain stable working conditions. Table 10
If R12 is used
Power supply voltage
Power supply voltage
Power supply frequency
Power supply frequency
Condensing temperature
Condensing temperature
6.13 Start-up durability test method
Exhaust pressure
(absolute pressure)
2.76±0.15
Evaporation temperature||tt| |If using R12
Discharge pressurebzxZ.net
(absolute pressure)
1.87+0.15
Evaporating temperature
If using R12
Suction pressure
(absolute pressure)
0.22±0.05
If using R12
Suction pressure
(absolute pressure)
0. 22±0. 05
Ambient temperature
Ambient temperature
Refrigerator
Refrigerator
Connect the compressor to the start-up durability test device (see Figure 5), evacuate it, and then fill it with an appropriate amount of refrigerant R12. Close the pressure equalizing valve, start and run the compressor, adjust the shut-off valve, stabilize the exhaust pressure at 1.34MPa±0.05MPa, stabilize the suction pressure at 0.22MPa±0.01MPa (both are absolute pressures), then shut down, and the preparations before the test are completed. The compressor is subjected to a startup durability test with reference to the test cycle recommended in Note 2. In each test cycle, the compressor must reach or exceed the above test pressure ratio and maintain it for about 2S, then shut down. Before the compressor is restarted, the connector between the movement and the housing should be brought to a stationary state, and the pressure in the system must be balanced. The test is continued until 200,000 cycles are completed, or until a fault occurs and the test cannot be continued. During the test, the balance pressure in the system should remain stable, otherwise the amount of refrigerant should be adjusted in time. It is allowed to use forced cooling outside the compressor to avoid the overheating protector during the test. Note: For compressors using CFC substitutes, the exhaust pressure is the saturation pressure of the substitute at 50℃±0.5℃, and the suction pressure is the saturation pressure of the substitute at 20℃±0.5℃. It is recommended that 18s~25s be a test cycle, which can be composed of 1/2 test cycle operation time and 1/2 test cycle downtime. 9098--1996
Complete. The pressure equalizing valve is electromagnetically controlled, and its use can shorten the time for pressure balance. 3 Compressors with PTC light starters can be replaced by equivalent non-PIC starters such as heavy hammer starters for testing. Exhaust pressure gauge
Equalizing pressure gauge
Compressor
7 Inspection rules
7.1 Factory inspection
Suction pressure gauge
Figure 5 Starting durability test device
Wen Shutoff valve
7.1.1 The compressor should be inspected before delivery. The factory inspection items include mandatory inspection items and random inspection items. 7.1.1.1 The mandatory inspection items, technical requirements and test methods of the factory inspection are shown in Table 12, items 1 to 6. 7.1.1.2 The random inspection items, technical requirements and test methods of the factory inspection are shown in Table 12, items 7 to 9 and items 13 to 21. 7. 1.2 The factory inspection plan shall be decided by the quality inspection department of the manufacturer. 7.2 Type inspection
The compressor shall be subjected to type inspection in the following cases. Table 12 Inspection content list
Inspection items
Cold electrical strength
Cold insulation resistance
Grounding device
Shell air tightness
Appearance requirements
Data documents and accessories, attachments||t t||Protection against electric shock
Electric strength of damp insulation
Damp insulation resistance
Leakage current at working temperature
Technical requirements
GB4706.17
Refer to Chapter 16 for self-determination
Refer to Chapter 16 for self-determination
Chapters 15 and 16
Chapters 15 and 16
This standard
Test methods
GB 4706.17
Refer to Chapter 16 for self-determination
Refer to Chapter 16 for self-determination
Chapter 27 (Visual inspection)
This standard1 The mandatory inspection items, technical requirements and test methods for factory inspection are shown in Table 12, 1 to 6. 7.1.1.2 The random inspection items, technical requirements and test methods for factory inspection are shown in Table 12, 7 to 9 and 13 to 21. 7.1.2 The factory inspection plan shall be determined by the quality inspection department of the manufacturer. 7.2 Type inspection
The compressor shall be subject to type inspection in the following circumstances. Table 12 Inspection content list
Inspection items
Cold electrical strength
Cold insulation resistance
Grounding device
Shell air tightness
Appearance requirements
Data documents and accessories, attachments
Protection against electric shock
Wet insulation electrical strength
Wet insulation resistance
Leakage current at working temperature
Technical requirements
GB4706.17
Refer to Chapter 16 for self-determination
Refer to Chapter 16 for self-determination
Chapters 15, 16
Chapters 15, 16
This standard
Test method
GB 4706.17
Refer to Chapter 16 for determination
Refer to Chapter 16 for self-determination
Chapter 27 (Visual Inspection)
This standard1 The mandatory inspection items, technical requirements and test methods for factory inspection are shown in Table 12, 1 to 6. 7.1.1.2 The random inspection items, technical requirements and test methods for factory inspection are shown in Table 12, 7 to 9 and 13 to 21. 7.1.2 The factory inspection plan shall be determined by the quality inspection department of the manufacturer. 7.2 Type inspection
The compressor shall be subject to type inspection in the following circumstances. Table 12 Inspection content list
Inspection items
Cold electrical strength
Cold insulation resistance
Grounding device
Shell air tightness
Appearance requirements
Data documents and accessories, attachments
Protection against electric shock
Wet insulation electrical strength
Wet insulation resistance
Leakage current at working temperature
Technical requirements
GB4706.17
Refer to Chapter 16 for self-determination
Refer to Chapter 16 for self-determination
Chapters 15, 16
Chapters 15, 16
This standard
Test method
GB 4706.17
Refer to Chapter 16 for determination
Refer to Chapter 16 for self-determination
Chapter 27 (Visual Inspection)
This standard
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