What does a car compressor assembly mean
The automotive compressor assembly is the core component of the automotive air conditioning system, referring to the overall device composed of the compressor and related components.
Core function
The compressor assembly generates cold air by compressing the refrigerant and serves as the power source for the air conditioning refrigeration system. Its working principle is to compress the refrigerant into high-pressure gas, which then passes through the condenser to dissipate heat and turns into low-pressure gas. After being cooled by the evaporator, it returns to the compressor for cyclic operation.
Structural composition
It usually includes key components such as the compressor body, electromagnetic clutch, and pulley. Among them, the electromagnetic clutch is responsible for controlling the connection between the compressor and the engine, while the pulley realizes power transmission through belt drive.
Industry standard
According to the GB/T 22068-2018 standard, the compressor assembly is a core component of the automotive air conditioning system and must meet technical performance and safety requirements.
The automotive compressor assembly is the core component of the automotive air conditioning refrigeration system. Its functions mainly include the following three aspects:
Maintain the refrigerant cycle
The compressor sucks in the low-temperature and low-pressure refrigerant vapor generated by the evaporator, compresses it into high-temperature and high-pressure gas, and then delivers it to the condenser, driving the entire refrigeration system to operate in a cycle.
Heat transfer
In the condenser, the high-temperature and high-pressure refrigerant gas turns into liquid through heat dissipation, and the released heat is discharged outside the vehicle. The liquid refrigerant then enters the evaporator through the expansion valve, absorbs the heat inside the vehicle and evaporates again, achieving cooling inside the vehicle.
Energy regulation
The compressor can automatically adjust its start and stop states according to the pressure in the air storage tank to prevent the engine from overloading and play a protective role.
The failure of the automotive air conditioning compressor assembly is usually manifested as the complete failure of the refrigeration system, and the specific type of failure needs to be determined through professional detection. The following are common types of faults and corresponding suggestions:
Common types of faults
Youdaoplaceholder0 refrigerant leakage
Leakage at condenser, pipe joints and other parts is a common cause, which is manifested as abnormal pressure (low pressure lower than 0.1MPa or high pressure lower than 1MPa). It is necessary to detect and repair the leakage before replenishing the refrigerant.
Youdaoplaceholder0 clutch failure
The burnout of the electromagnetic coil or the wear of the friction plate can cause the compressor not to start or to work intermittently, which is manifested as a "buzzing" sound when the air conditioner is turned on but the compressor does not rotate. The clutch assembly can be replaced separately.
Youdaoplaceholder0 internal mechanical damage
Core components such as pistons and bearings wear out and need to replace the assembly, which is manifested as compressor seizing, increased power loss (engine power increases after removing the belt), or abnormal noise.
The working principle of the automotive compressor assembly mainly involves the process of refrigerant compression and transportation. Its core component is the compressor, which regulates the temperature inside the vehicle by compressing the refrigerant.
Refrigerant compression process
The compressor compresses the refrigerant from a low-pressure state to a high-pressure state through rotational motion, increasing its pressure and temperature. This process releases heat in the condenser. Subsequently, the refrigerant enters the liquid storage dryer for purification, then passes through the expansion valve to reduce pressure and temperature, and finally evaporates and absorbs heat in the evaporator to achieve cooling.
Power source
Traditional fuel vehicles drive compressors through engine belts, while new energy vehicles use electric compressors, which are directly driven by motors to scroll compressors and are powered by high-voltage direct current. Electric compressors need to dissipate heat and cool down by drawing in refrigerant.
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