QC/T 656-2023 in English
VALIDHeating ventilation and air conditioning assembly for automotive air conditioning
- Issued on:2023-04-21
- Implemented on:2023-11-01
- File Format:PDF
- Delivery:Via email within 5 business days
Price(USD)：
$490.00
$476.00
$476.00
Introduction
Background of Standard Revision and Technological Evolution
| Main Improvement Direction | 2000 Edition of the Standard | 2023 Edition of the Standard | Technological Breakthrough |
|---|---|---|---|
| Coverage | Refrigeration Device Only | Complete HVAC System | Added Comprehensive Functions Such as Heating and Defrost |
| Test Parameters | 7 Basic Indicators | 26 Full-Dimensional Indicators | 8 New Requirements Such as Electromagnetic Compatibility |
| Refrigerant type | HFC-134a only | Compatible with HFO-1234yf | Environmentally friendly refrigerant adaptation |
Technical requirements for core components
1. EvaporatorPerformance specification
According to QC/T1176 requirements, the following must be met:
- Air tightness: 2.8MPa pressure maintenance without leakage
- Vibration resistance: 33.3Hz/28.4m/s² vibration test
- Drainage performance: 40mL/min water spray test without water accumulation
2. Key indicators of the damper system
| Damper Type | Leakage Limit | Durability Test | Temperature Linearity |
|---|---|---|---|
| Mode Damper | ≤1L/s@250Pa | 15,000 cycles | — |
| Temperature Damper | ΔT≤1℃ | 15,000 cycles | 5% Step Test |
| Intake Damper | ≤1L/s@490Pa | 38,000 cycles | — |
Comparison of Key Test Methods
Refrigeration Capacity Test (Clause 5.4)
| Parameter | HFC-134a | HFO-1234yf | Tolerance |
|---|---|---|---|
| Evaporation Pressure | 0.193MPa | 0.216MPa | ±0.005MPa |
| Condensing Pressure | 1.47MPa | 1.44MPa | ±0.01MPa |
| Subcooling | 5.0℃ | ±0.5℃ | |
New environment adaptability test
- Anti-frosting test: -40℃~85℃ temperature cycle 10 times
- Electromagnetic compatibility: GB34660 radiation immunity test
- Vibration test: 2.5×10⁵ vibrations in each of the three axes
Implementation recommendations for new energy vehicles
- Prioritize the use of brushless motor blower (13.5V maximum duty cycle control)
- The electric heater must meet the -20℃ low temperature start-up requirements of QC/T1101
- It is recommended to increase the redundant design of PTC heaters (power ≥1.5 times the nominal value)
- It is recommended to use CAN bus control for intelligent damper actuators
Sample only — not a preview of QC/T 656-2023
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