Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 21361-2008 Motor vehicle air-conditioning unit. The following technical changes have been made with respect to GB/T 21361-2008 (the previous edition):
- the definition of refrigeration coefficient of performance is added (see 3.10);
- the requirements for radio disturbance characteristics and air quality are added (see 5.2);
- the operational test requirements are modified (see 5.5.2);
- the requirements on airtightness are modified (see 5.5.1);
- the requirements on noise are modified (see 5.5.10);
- the measurement requirements for grounding resistance are deleted (see 5.6.4.3);
- the field test method for refrigerating capacity of motor vehicle air-conditioning unit is added (see Annex D).
This standard was proposed by China Machinery Industry Federation.
This standard is under the jurisdiction of SAC/TC 238 National Technical Committee on Refrigeration & Air-conditioning Equipment of Standardization Administration of China.
The previous edition of standard replaced by this standard is as follow:
- GB/T 21361-2008.
Motor vehicle air-conditioning unit
1 Scope
This standard specifies the terms and definitions, types and basic parameters, requirements, test methods, inspection rules, marking, packaging, transport and storage of motor vehicle air-conditioning unit (hereinafter referred to as air-conditioning unit).
This standard is applicable to motor vehicle air-conditioning unit for refrigeration purpose.
Note: for the definition of motor vehicle, see GB/T 3730.1.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 3785.1-2010 Electroacoustics - Sound level meters - Part 1: Specifications
GB 4706.32 Safety of household and similar electrical appliances - Particular requirements for heat pumps, air-conditioner and dehumidifier
GB 5226.1 Electrical safety of machinery - Electrical equipment of machines - Part 1: General requirements
GB/T 6388 Transport package shipping mark
GB 8410 Flammability of automotive interior materials
GB 9237-2001 Mechanical refrigerating systems used for cooling and heating - Safety requirements
GB/T 13306 Plates
GB/T 18655 Vehicles boats and internal combustion engines - Radio disturbance characteristics - Limits and methods of measurement for the protection of on-board receivers
GB/T 27630 Guideline for air quality assessment of passenger car
JB/T 7249 Refrigerating equipment - Terms
SAE J 1627-1995 Performance criteria for electronic refrigerant leak detectors
SAE J 1628 Technician procedure for using electronic refrigerant leak detectors for service of mobile air-conditioning systems
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in JB/T 7249 as well as those listed below apply.
3.1
motor vehicle air-conditioning unit
an air conditioning system consisting of compressor, condenser, throttling element, evaporator, fan, and necessary control components, used to regulate the temperature and humidity in the motor vehicle, and providing the passenger with comfortable environment
3.2
indirect drive air-conditioning unit
air-conditioning unit with its compressor driven by independent auxiliary power unit
3.3
direct drive air-conditioning unit
air-conditioning unit with its compressor driven by main power of motor vehicle
3.4
air enthalpy difference
a method for determining the capacity of air-conditioning unit, which measures the air supply parameters, the return air parameters and the circulating air volume of the air-conditioning unit. And the refrigerating capacity of the air-conditioning unit shall be determined by the product of the measured air volume and the difference between the enthalpy of air supply and that of return air
3.5
refrigerating capacity
the amount of heat that the air-conditioning unit discharges from the enclosed space, inside of the motor vehicle or area under the specified refrigerating capacity test conditions
Note: the unit of refrigerating capacity is watts (W).
3.6
air flow rate
the volumetric flow of air entering the air-conditioning unit per unit time under the specified refrigerating capacity test conditions
Note: the unit of air flow rate is cubic meter per hour (m3/h).
3.7
compressor drive power
the power consumed by driving the compressor under the specified refrigerating capacity test conditions
Note: the unit of compressor drive power is watt (W).
3.8
accessory electric power
the total power of the evaporator fan, the condenser fan, the electromagnetic clutch of the air-conditioning unit as well as its electronic control system under the specified refrigerating capacity test conditions
Note: the unit of accessory electric power is watt (W).
3.9
energy efficiency ratio; EER
the ratio of the refrigerating capacity of air-conditioning unit to the compressor drive power under the specified refrigerating capacity test conditions
Note: the unit of energy efficiency ratio is watt per watt (W/W).
3.10
refrigeration coefficient of performance; REER
the ratio of the refrigerating capacity of air-conditioning unit to the compressor drive power under the specified engine rotation speed
The refrigeration coefficient of performance is calculated with Formula (1):
REER=10％EER①+50％EER②+40％EER③(1)
Where,
EER①——the ratio of the refrigerating capacity of air-conditioning unit to the compressor drive power in case of the engine is operated at low rotation speed;
EER②——the ratio of the refrigerating capacity of air-conditioning unit to the compressor drive power in case of the engine is operated at nominal refrigerating rotation speed;
EER③——the ratio of the refrigerating capacity of air-conditioning unit to the compressor drive power in case of the engine is operated at high rotation speed.
Note: the unit of refrigeration coefficient of performance is watt per watt (W/W).
4 Types and basic parameters
4.1 Types
4.1.1 It is classified by the driving mode of the refrigeration compressor into:
- indirect drive type;
- direct drive type.
4.1.2 It is classified by the structural style of motor vehicle air-conditioning unit into:
- integral type;
- split type.
4.1.3 It is classified by the arrangement mode of evaporator of motor vehicle air-conditioning unit into:
- top-mounted;
- rear-mounted;
- bottom–mounted;
- built-in type.
4.1.4 It is classified by the air supply mode of motor vehicle air-conditioning unit into:
- direct blowing type;
- air duct type.
4.2 Basic parameters
4.2.1 The basic parameters of the air-conditioning unit include refrigerating capacity, air flow rate, compressor drive power, accessory electric power and noise.
4.2.2 The external static pressure for the air-conditioning unit without on-site air duct shall be 0 Pa, and that for the air-conditioning unit with on-site air duct shall be nominal.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Types and basic parameters
5 Requirements
6 Test method
7 Inspection rules
8 Marking, packaging, transport and storage
Annex A (Normative) Test method for the refrigerating capacity of air-conditioning unit
Annex B (Normative) Noise test method of air-conditioning units
Annex C (Normative) Vibration test method for air-conditioning units
Annex D (Informative) Test method for refrigerating capacity of air-conditioning units at the service site
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 21361-2008 Motor vehicle air-conditioning unit. The following technical changes have been made with respect to GB/T 21361-2008 (the previous edition):
- the definition of refrigeration coefficient of performance is added (see 3.10);
- the requirements for radio disturbance characteristics and air quality are added (see 5.2);
- the operational test requirements are modified (see 5.5.2);
- the requirements on airtightness are modified (see 5.5.1);
- the requirements on noise are modified (see 5.5.10);
- the measurement requirements for grounding resistance are deleted (see 5.6.4.3);
- the field test method for refrigerating capacity of motor vehicle air-conditioning unit is added (see Annex D).
This standard was proposed by China Machinery Industry Federation.
This standard is under the jurisdiction of SAC/TC 238 National Technical Committee on Refrigeration & Air-conditioning Equipment of Standardization Administration of China.
The previous edition of standard replaced by this standard is as follow:
- GB/T 21361-2008.
Motor vehicle air-conditioning unit
1 Scope
This standard specifies the terms and definitions, types and basic parameters, requirements, test methods, inspection rules, marking, packaging, transport and storage of motor vehicle air-conditioning unit (hereinafter referred to as air-conditioning unit).
This standard is applicable to motor vehicle air-conditioning unit for refrigeration purpose.
Note: for the definition of motor vehicle, see GB/T 3730.1.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 3785.1-2010 Electroacoustics - Sound level meters - Part 1: Specifications
GB 4706.32 Safety of household and similar electrical appliances - Particular requirements for heat pumps, air-conditioner and dehumidifier
GB 5226.1 Electrical safety of machinery - Electrical equipment of machines - Part 1: General requirements
GB/T 6388 Transport package shipping mark
GB 8410 Flammability of automotive interior materials
GB 9237-2001 Mechanical refrigerating systems used for cooling and heating - Safety requirements
GB/T 13306 Plates
GB/T 18655 Vehicles boats and internal combustion engines - Radio disturbance characteristics - Limits and methods of measurement for the protection of on-board receivers
GB/T 27630 Guideline for air quality assessment of passenger car
JB/T 7249 Refrigerating equipment - Terms
SAE J 1627-1995 Performance criteria for electronic refrigerant leak detectors
SAE J 1628 Technician procedure for using electronic refrigerant leak detectors for service of mobile air-conditioning systems
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in JB/T 7249 as well as those listed below apply.
3.1
motor vehicle air-conditioning unit
an air conditioning system consisting of compressor, condenser, throttling element, evaporator, fan, and necessary control components, used to regulate the temperature and humidity in the motor vehicle, and providing the passenger with comfortable environment
3.2
indirect drive air-conditioning unit
air-conditioning unit with its compressor driven by independent auxiliary power unit
3.3
direct drive air-conditioning unit
air-conditioning unit with its compressor driven by main power of motor vehicle
3.4
air enthalpy difference
a method for determining the capacity of air-conditioning unit, which measures the air supply parameters, the return air parameters and the circulating air volume of the air-conditioning unit. And the refrigerating capacity of the air-conditioning unit shall be determined by the product of the measured air volume and the difference between the enthalpy of air supply and that of return air
3.5
refrigerating capacity
the amount of heat that the air-conditioning unit discharges from the enclosed space, inside of the motor vehicle or area under the specified refrigerating capacity test conditions
Note: the unit of refrigerating capacity is watts (W).
3.6
air flow rate
the volumetric flow of air entering the air-conditioning unit per unit time under the specified refrigerating capacity test conditions
Note: the unit of air flow rate is cubic meter per hour (m3/h).
3.7
compressor drive power
the power consumed by driving the compressor under the specified refrigerating capacity test conditions
Note: the unit of compressor drive power is watt (W).
3.8
accessory electric power
the total power of the evaporator fan, the condenser fan, the electromagnetic clutch of the air-conditioning unit as well as its electronic control system under the specified refrigerating capacity test conditions
Note: the unit of accessory electric power is watt (W).
3.9
energy efficiency ratio; EER
the ratio of the refrigerating capacity of air-conditioning unit to the compressor drive power under the specified refrigerating capacity test conditions
Note: the unit of energy efficiency ratio is watt per watt (W/W).
3.10
refrigeration coefficient of performance; REER
the ratio of the refrigerating capacity of air-conditioning unit to the compressor drive power under the specified engine rotation speed
The refrigeration coefficient of performance is calculated with Formula (1):
REER=10％EER①+50％EER②+40％EER③(1)
Where,
EER①——the ratio of the refrigerating capacity of air-conditioning unit to the compressor drive power in case of the engine is operated at low rotation speed;
EER②——the ratio of the refrigerating capacity of air-conditioning unit to the compressor drive power in case of the engine is operated at nominal refrigerating rotation speed;
EER③——the ratio of the refrigerating capacity of air-conditioning unit to the compressor drive power in case of the engine is operated at high rotation speed.
Note: the unit of refrigeration coefficient of performance is watt per watt (W/W).
4 Types and basic parameters
4.1 Types
4.1.1 It is classified by the driving mode of the refrigeration compressor into:
- indirect drive type;
- direct drive type.
4.1.2 It is classified by the structural style of motor vehicle air-conditioning unit into:
- integral type;
- split type.
4.1.3 It is classified by the arrangement mode of evaporator of motor vehicle air-conditioning unit into:
- top-mounted;
- rear-mounted;
- bottom–mounted;
- built-in type.
4.1.4 It is classified by the air supply mode of motor vehicle air-conditioning unit into:
- direct blowing type;
- air duct type.
4.2 Basic parameters
4.2.1 The basic parameters of the air-conditioning unit include refrigerating capacity, air flow rate, compressor drive power, accessory electric power and noise.
4.2.2 The external static pressure for the air-conditioning unit without on-site air duct shall be 0 Pa, and that for the air-conditioning unit with on-site air duct shall be nominal.
Contents of GB/T 21361-2017
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Types and basic parameters
5 Requirements
6 Test method
7 Inspection rules
8 Marking, packaging, transport and storage
Annex A (Normative) Test method for the refrigerating capacity of air-conditioning unit
Annex B (Normative) Noise test method of air-conditioning units
Annex C (Normative) Vibration test method for air-conditioning units
Annex D (Informative) Test method for refrigerating capacity of air-conditioning units at the service site
