QC/T 945-2013 English PDF (QCT945-2013)

Delivery: 3 seconds. Download true-PDF + Invoice.
Get QUOTATION in 1-minute: Click QC/T 945-2013
Historical versions: QC/T 945-2013
Preview True-PDF (Reload/Scroll if blank)

QC/T 945-2013: Passenger vehicle air-conditioning unit
QC/T 945-2013
QC
NATIONAL AUTOMOBILE STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.60
T 26
Passenger vehicle air conditioning unit
ISSUED ON: OCTOBER 17, 2013
IMPLEMENTED ON: MARCH 01, 2014
Issued by: Ministry of Industry and Information Technology of the People's
Republic of China
Passenger vehicle air conditioning unit
1 Scope
This Standard specifies the requirements, test methods, inspection rules, marking,
packaging, transportation and storage requirements for passenger vehicle air
conditioning units using HFC-134a as refrigerant.
This Standard applies to the production, testing and inspection of passenger vehicle air
conditioning units.
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 191-2008, Packaging and storage marks
GB 4706.32, Safety of household and similar electrical appliances - Part 32:
Particular requirements for electrical heat pumps, air-conditioners and
dehumidifiers (IEC 60335-2-40:1995, IDT)
GB 5226.1, Electrical safety of machinery -- Electrical equipment of machines --
Part 1: General requirements (IEC 60204-1:2000, IDT)
GB 8410, Flammability of automotive interior materials
GB/T 10125, Corrosion tests in artificial atmospheres -- Salt spray tests
GB 11555, Motor vehicles-windshield demisting and defrosting systems --
Performance requirements and test methods
GB/T 12782-2007, Requirement and test method of heating performance for motor
vehicle
GB/T 21361-2008, Motor vehicle air conditioning unit
QC/T 657, Automotive air conditioning and refrigeration unit test method
QC/T 658, Air conditioning refrigeration system performances road test method for
motor vehicles
QC/T 664, Automotive air conditioning refrigerant hose
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in GB/T 21361-
2008 as well as the followings apply.
3.1 heating, ventilation and air conditioning assembly
It is composed of a blower, evaporator, heater core and air door control mechanism. It
regulates the temperature of the air delivered to the vehicle and controls the air intake,
air supply mode and air volume.
3.2 air enthalpy difference
A method for determining the heat exchange capacity of an air conditioning unit. By
measuring the air inlet parameters, air outlet parameters and air volume of the air
conditioning unit, the heat exchange capacity of the air conditioning unit is determined
by multiplying the specific melting difference between the inlet and outlet air by the air
volume.
4 Requirements
4.1 General requirements
4.1.1 Manufacturing
Air conditioning units shall comply with the provisions of this Standard and be
manufactured according to drawings and technical documents approved through
prescribed procedures.
4.1.2 Appearance and installation dimensions
The appearance of the product shall be flat and smooth without dents or scratches. The
installation dimensions shall comply with the requirements of the drawings.
4.1.3 Requirements for parts, components and materials
All parts, components and materials in the air conditioning unit shall comply with the
relevant standards, meet the performance requirements and ensure safety. The
combustion characteristics of interior materials shall meet the requirements of GB 8410.
The selection and installation of electrical components shall comply with the
requirements of GB 4706.32 and GB 5226.1.
4.1.4 Refrigerant filling
Refrigerant filling shall be carried out quantitatively on the automobile factory
assembly line according to the design requirements. When filling, the system must be
evacuated to an absolute pressure of less than 500 Pa. The quantitative filling device
shall pass the metrological verification. The accuracy of the device shall not be less
than ± 15 g.
4.2 Thermal performance
4.2.1 Refrigeration performance
The cooling capacity and air volume of the air conditioning unit shall meet the design
requirements. The energy efficiency ratio shall be greater than 2.1 W/W.
4.2.2 Heating performance
The heating capacity and air volume of the air conditioning unit shall meet the design
requirements.
4.3 Environment simulation test
The air conditioning unit is installed on the vehicle according to the design requirements
and subjected to environment simulation tests. The test results of its temperature rise
and temperature drop performance shall meet the design requirements.
4.4 Defrosting and defogging performance
The defrosting and defogging performance shall comply with the requirements of
standard GB 11555.
4.5 Heating, ventilation and air conditioning assembly
4.5.1 Power-on performance
4.5.1.1 For heating, ventilation and air conditioning assembly without speed regulating
devices, the minimum starting voltage of the blower assembly shall meet the design
requirements. After the assembly is powered on, it shall run smoothly without
scratching or abnormal noise.
4.5.1.2 For heating, ventilation and air conditioning assembly with speed control
devices, the blower assembly shall have clear gears after power is turned on. Each wind
speed shall run smoothly without scratching or abnormal noise.
4.5.1.3 The blower assembly shall be able to operate normally at rated voltage. The
current shall meet the design requirements.
4.5.1.4 The damper drive motor assembly shall run smoothly when the terminal voltage
is 70% of the rated voltage. The damper shall not shake, make scraping sounds, creaking
sounds or similar sounds, and shall be able to reach the designated position smoothly.
The adjustment time shall meet the design requirements.
4.5.2 Impedance of thermistor
conditioning assembly shall be able to operate normally when powered on; the damper
can operate normally; the assembly has no deformation or damage and meets the
requirements of 4.5.7 of this Standard.
4.5.11 Water content
The total water content in the evaporator core shall not exceed 30 mg.
4.5.12 Residual impurities content
The total weight of residual impurities in the evaporator core shall not exceed 20 mg.
The maximum particle diameter shall not exceed 0.2 mm.
4.5.13 Burst pressure
The minimum hydraulic bursting pressure of the evaporator core is 2.8 MPa (gauge
pressure). No permanent deformation shall occur when the pressure reaches 1.4 MPa
(gauge pressure).
4.6 Condenser assembly
4.6.1 Airtight performance
The leakage of HFC-134a of the condenser core assembly at 0.7 MPa shall not exceed
2 g/a.
4.6.2 Vibration resistance
After the product has completed the vibration resistance test as required, it shall comply
with the requirements of 4.6.1 of this Standard.
4.6.3 Corrosion resistance
After the assembly is subjected to a 168h neutral salt spray test in accordance with
standard GB/T 10125, there shall be no bubbling, paint peeling or surface pitting on the
outer surface of the metal parts. Its air tightness shall still meet the requirements of 4.6.1
of this Standard.
4.6.4 Water content
The residual water content in the condenser core cavity shall not exceed 30 mg.
4.6.5 Residual impurities content
The residual impurity content in the inner cavity of the condenser core shall not exceed
20 mg. The maximum particle diameter shal...