GB/T 21361-2017Motor vehicle air-conditioning unit (English PDF)

3.1 Motor Vehicle Air-conditioning Unit

Motor vehicle air-conditioning unit refers to an air-conditioning system that is constituted of compressor, condenser, throttle element, evaporator, draught fan and necessary control units. It is adopted to adjust the interior temperature and humidity in motor vehicle and provide comfortable environment to passengers.

3.5 Refrigerating Capacity

Refrigerating capacity refers to the heat that air conditioning unit drains away from enclosed space, interior space or area of motor vehicle under stipulated refrigerating capacity and test conditions.

NOTE: the unit of refrigerating capacity is (W).

3.6 Air Flow Rate

Air flow rate refers to the volume flow rate of air that enters air conditioning unit within a unit time under stipulated refrigerating capacity and test conditions.

3.10 Refrigeration Coefficient of Performance; REER

Refrigeration coefficient of performance refers to the ratio of air conditioning unit's refrigerating capacity to the compressor drive power under stipulated engine speed.

Refrigeration coefficient of performance shall be calculated in accordance with Formula (1).

4.1 Models

4.1.1 In accordance with the drive mode of refrigerating compressor, it can be divided into.

4.1.2 In accordance with structural model of motor vehicle air conditioning unit, it can be divided into.

4.1.3 In accordance with the evaporator's layout mode of motor vehicle air conditioning unit, it can be divided into.

4.1.4 In accordance with the air supply mode of motor vehicle air conditioning unit, it can be divided into.

4.2 Basic Parameters

5.1 General Requirements

5.1.1 Air conditioning unit shall comply with the stipulation in this Standard; air conditioning unit shall be manufactured in accordance with drawings and technical documents that are approved through a stipulated procedure.

5.2 Requirements of Components and Materials

5.2.1 All the components and materials of air conditioning unit shall respectively comply with the stipulation in relevant standards; satisfy the requirements of functional performance and guarantee the safety.

5.3 Structural Requirements

5.3.1 The drainage structure of air conditioning unit shall be reliable. During the operation, condensation water and raindrops shall not leak into the car. The air outlet of air conditioning unit shall not spray with water.

5.4 Requirements of Assembly

5.4.1 Before assembly, the various components of the refrigerating system of air conditioning unit shall be clean and dry.

5.5 Performance Requirements

5.5.1 Air-tightness

The test shall be conducted in accordance with Method a) in 6.3.1 or Method b) in 6.3.1.

5.5.2 Operation

When the test is conducted in accordance with the method in 6.3.2, the assembly of the evaporator and the condenser shall be able to function normally. The safety protection device shall be sensitive and reliable; the motion of control components, such as temperature and electrical appliances, shall be normal. All the test items shall comply with the requirement in design.

6.1 Test Conditions

6.1.1 Please refer to Appendix A for the test device of air conditioning unit.

6.1.2 The working condition of the test shall comply with the stipulation in Table 1.

6.1.3 The speed of the compressor shall comply with the stipulation in Table 2.

6.1.4 The motor terminal voltage for the draught fan shall comply with the stipulation in Table 3.

6.2 General Requirements

6.2.1 All the tests of the air conditioning unit shall comply with the nominal voltage and nominal frequency on the plate.

6.2.2 In terms of the split type of air conditioning unit, the pipe that connects the indoor unit and the outdoor unit shall be tested in accordance with the full length or 10 m pipe provided by the manufacturer.

6.3 Test Methods

6.3.1 Air-tightness test

6.3.2 Operation test

Test the operative condition of the assembly of the evaporator and the condenser; the sensitivity and reliability of safety protection devices. Test whether the motion of control components, such as temperature and electrical appliances, is normal.

6.3.10 Noise test

Under nominal voltage and nominal frequency, test the noise of the air conditioning unit in accordance with the stipulation in Appendix B.

6.3.11 Vibration test

Conduct the vibration test of the air conditioning unit in accordance with the stipulation in Appendix C.

6.3.12 Test of safety property of electrical appliance

7.1 Exit-factory Inspection

Each air conditioning unit shall receive exit-factory inspection. Inspection items, technical requirements and test methods shall comply with the stipulation in Table 10.

7.2 Sampling Inspection

7.2.1 In sampling inspection, air conditioning unit samples shall be taken from products that are qualified in the exit-factory inspection. Inspection items and test methods shall comply with the stipulation in Table 10.

7.3 Model Inspection

When there is significant improvement in new products or stereotyped products, or when the first set of products is released, model inspection shall be conducted. Inspection items shall comply with the stipulation in Table 10.

8.1 Marking

8.1.2 Air conditioning unit shall have a mark that displays its operating status, such as an arrow of the draught fan's rotation direction, indicating instrument and grounding mark, etc.

8.1.3 When exit-factory, each air conditioning unit shall be equipped with the following technical documents.

8.1.4 The code number of the standard being implemented shall be marked in a corresponding position (such as nameplate and product instruction, etc.).

8.2 Packaging

8.2.3 The packaging box of air conditioning unit shall have the following marks.

8.3 Transportation and Storage

8.3.1 During the transportation and storage, air conditioning unit shall not be collided, inclined or damaged by rain or snow.

8.3.2 Products shall be stored in a dry warehouse with good ventilation. […]