GB/T 22068-2025Electrically driven compressor assembly for automobile air conditioning (English PDF)

4.1 Types

4.1.1 Electrically driven compressor assemblies (hereinafter referred to as "compressors") are classified according to the functions as follows:

4.1.2 Compressors are classified according to the structural types as follows:

4.1.3 Compressors are classified according to the sealing types as follows:

4.1.4 Compressors are classified according to the applicable vehicle models as follows:

4.1.5 Compressors are classified according to displacement range (see Table 1 for displacement range) as follows:

4.2 Basic parameters See Table 1 for the basic parameters of compressor.

4.3 Nominal working conditions See Table 2 for the nominal working conditions of compressor.

5.1 General

5.1.1 The compressor shall be manufactured in accordance with the drawings and technical documents approved in accordance with the prescribed procedures (or the agreement between the user and the manufacturer).

5.1.2 The requirements and tests for integral compressors are unified with those for the compressor with direct current motor.

5.2 Appearance The outer surface of the compressor with direct current motor and the drive controller shall not have any appearance defects such as oil stains, rust, sharp edges, etc. The wire sheath shall not be broken, and the connectors shall not be deformed or damaged.

5.3 Compressor refrigerating (heating) capacity, input power, refrigerating (heating) coefficient of performance

5.3.1 The measured compressor refrigerating (heating) capacity shall not be less than 95% of the nominal refrigerating (heating) capacity.

5.3.2 The measured input power of the compressor shall not be greater than 110% of the nominal input power.

5.3.3 The measured compressor refrigerating (heating) coefficient of performance shall not be less than 95% of the indicated value and shall not be less than the limit value specified in Table

3.For compressors with direct current motor without drive controller, the refrigerating (heating) coefficient of performance shall not be less than 110% of the limit value specified in Table 3.

5.4.1.2 Sweep frequency noise After the test, the sweep frequency noise value of the compressor shall meet the design requirements of the manufacturer or the requirements agreed upon by the supplier and the buyer.

5.4.3 Vibrations

5.4.3.1 Rated speed vibration acceleration The root mean square value of the vibration acceleration at three positions of the compressor shall meet the design requirements of the manufacturer or the requirements agreed upon by the supplier and the purchaser.

5.5 Exciting force Within the allowable speed range, the measured exciting force of the electric compressor in the horizontal front and rear (X axis), horizontal left and right (Y axis), and vertical (Z axis) directions shall not be greater than the maximum allowable exciting force (Fmax). The maximum allowable exciting force is calculated according to Formula (1).

5.6 Compressor with direct current motor

5.6.1 Internal cleanliness The internal cleanliness of the compressor with direct current motor shall meet the following requirements.

5.6.2 Internal moisture content Within 24 hours after the compressor with direct current motor is assembled, the internal moisture content of the compressor with direct current motor shall not be greater than 500×10-6 when tested according to the method in 6.6.2.

5.6.3 Tightness The total leakage of the compressor with direct current motor shall not exceed 14 g/a.

5.6.7 Cyclic damp heat performance After the cyclic damp heat performance test, the compressor with direct current motor with closed suction and exhaust ports shall meet the following requirements.

5.6.8 Corrosion resistance

5.6.8.1 After the corrosion resistance test of compressors for passenger cars, the compressor with direct current motor shall meet the following requirements.

5.6.8.2 After the corrosion resistance test, the compressor for passenger cars shall meet the design requirements of the manufacturer or the requirements agreed upon by the supplier and the buyer.

5.6.9 Insulation resistance of motor stator winding to enclosure The insulation resistance of the motor stator winding to the enclosure shall meet the following requirements.

a) After the refrigeration oil inside the compressor with direct current motor is emptied, the insulation resistance of the motor stator winding to the enclosure shall be greater than 50 MOmega;

b) After charging the compressor with direct current motor with refrigeration oil (filling of refrigeration oil as specified in the compressor drawing) and refrigerant (charging the amount of refrigerant in the compressor as per the maximum allowable charge amount), operate it for not less than 5 minutes after the first charge of refrigerant. The insulation resistance of the motor stator winding to the enclosure shall be greater than 10 MOmega.

5.6.10 Withstand voltage of motor stator winding to enclosure The insulation of the motor stator winding to the enclosure shall be able to withstand the test voltage specified in Table

9.There shall be no breakdown, flashover or arcing of the insulation. The leakage current shall comply with the provisions of Table 9.

6.4.1 Noise test

6.4.1.2 Sweep frequency noise test According to the method specified in 6.4.1.1, operate the compressor at rated speed. When the system reaches the operating conditions specified in the noise test, reduce the compressor speed to the minimum speed, and then increase it from the minimum speed to the maximum speed (the speed reduction and speed increase rate is 60r/s), and record the noise data.

6.4.2 Pressure pulsation test

6.4.2.1 Rated speed pressure pulsation test Under the test conditions specified in Table 11, arrange the pressure pulsation sensor on the refrigerant pipeline, 200 mm~250 mm away from the compressor suction and exhaust ports. The pipeline bending radius is R >50 mm. Ensure a straight pipe section of 150 mm~200 mm behind the sensor (see Figure 1); read and record the compressor suction and exhaust pressure pulsation data.

6.4.3 Vibration test

6.4.3.1 Rated speed vibration test While conducting the rated speed noise test, place the vibration sensors at three locations of the compressor. the suction end, the exhaust end, and the side point of the center point (close to the center point of the compressor); read and record the copressor vibration data.

6.6.1 Internal cleanliness

6.6.1.1 Compressors for passenger cars and semi-hermetic compressors for buses shall be tested in accordance with the method specified in GB/T 21360.

6.6.2 Internal moisture content

6.6.2.1 Compressors for passenger cars and semi-hermetic compressors for buses shall be tested in accordance with the method specified in GB/T 21360.

6.6.2.2 The fully enclosed scroll compressor for passenger cars shall be tested according to the method specified in

6.2.5 of GB/T 18429-2018.The fully enclosed rotor compressor for passenger cars shall be tested according to the method specified in

6.8 of GB/T 15765-2021.

6.6.3 Tightness test

6.6.3.1 Compressors for passenger cars and semi-hermetic compressors for buses shall be tested in accordance with the method specified in GB/T 21360.

6.6.3.2 The fully enclosed scroll compressor for passenger cars shall be tested according to the method specified in

6.2.1 of GB/T 18429-2018.The fully enclosed rotor compressor for passenger cars shall be tested according to the method specified in

6.7 of GB/T 15765-2021.

6.8.2 Initiation of the liquid shock durability test The principle diagram of the test device is shown in Figure

4.Install the compressor on the test device system, and add a proper amount of refrigerant after vacuuming and leak detection. The compressor is subjected to an initiation of the liquid shock durability test according to the operating conditions specified in Table

18.The test steps are as follows:

6.10.1 Electromagnetic immunity

6.10.1.1 Electromagnetic radiation immunity According to the provisions of GB/T 17619, carry out the electromagnetic radiation immunity test of the compressor by using the free field method, transverse electromagnetic wave cell (TEM) or large current injection method; alternatively, carry out the test in accordance with the method agreed by both parties after consultation with the user.

6.10.1.2 Electrical transient conduction immunity Carry out the compressor electrical transient conduction immunity test in accordance with the provisions of GB/T 21437.2 and GB/T 21437.3 or in accordance with a method agreed upon by both parties after consultation with the user.

7.1 Factory inspection

7.1.1 Each compressor shall be inspected and qualified by the manufacturer before leaving the factory.

7.1.2 The factory inspection items, technical requirements and test methods for compressors shall be in accordance with the provisions of Table 20.

7.2 Sampling inspection

7.2.1 Sampling shall be carried out in accordance with the sampling method and sampling quantity specified by the manufacturer from the electric compressors that have passed the factory inspection.

7.2.2 The inspection items, technical requirements and test methods for sampling inspection shall be in accordance with the provisions of Table 20.

7.2.3 If the sampling fails, double the quantity shall be re-inspected. If there is still one unqualified unit, the batch of products shall be inspected unit by unit.

7.3 Type inspection

7.3.1 Type inspection shall be carried out in any of the following cases.

7.3.2 Type inspection items, technical requirements and test methods shall be in accordance with the provisions of Table 20.

8.1 Marking

8.1.1 Each compressor shall have a permanent nameplate fixed in a prominent position. The nameplate shall comply with the provisions of GB/T 13306 and the content of the nameplate shall at least include.

8.1.2 The product implementation standard number shall be marked in appropriate places (such as nameplate, product manual, etc.).

8.2 Packaging

8.2.1 The compressor shall be cleaned, dried, and rust-proofed before packaging, and then filled with dry nitrogen or corresponding refrigerant gas (except dangerous ones) at a pressure higher than atmospheric pressure.

8.2.2 The packaging of compressors shall comply with the requirements of GB/T 191. Special requirement of the buyer, if any, shall be determined by both parties.

8.2.3 The compressor in the packaging box shall be securely fixed and be provided with moisture-proof and vibration-proof measures.

8.2.4 The outside of the packaging box shall at least indicate the following.

8.3 Transportation and storage

8.3.1 The compressor shall be protected from damage during normal transportation, loading and unloading.

8.3.2 The compressor shall be stored in a dry and ventilated environment, and there shall be no corrosive gas around it.