Introduction to the maintenance of automobile air-conditioning system

　　Automobile air conditioners are composed of compressors, condensers, air-conditioning pipelines, evaporators and electrical circuits.It uses the constant frequency conversion cycle of the refrigerant to achieve the cooling effect.The characteristic of liquid refrigerant is that it can be vaporized at normal temperature. When it is heated, it becomes a vapor to absorb the surrounding heat, and when it is cold, it becomes a liquid and releases its own heat.The air-conditioning system uses the characteristics of refrigerant to take away the heat in the compartment and transfer it to a place outside the compartment.

Car air-conditioning system inspection and maintenance

Compressor: The mounting bracket of the compressor must not be loosened.The drive V-belt is tightly tight. Too loose will cause slipping, resulting in a decrease in compressor speed and insufficient cooling capacity; too tight will aggravate belt wear and cause premature damage to the crankshaft bearing.The oil level of the compressor refrigerating machine oil should be within the specified range. Under normal circumstances, the refrigerating machine oil consumption is very small. If the refrigerating machine oil cannot be seen from the oil sight lens of the compressor, it indicates that the air-conditioning system is leaking and should be repaired in time.

Condenser: In order to ensure that the entire air-conditioning system can work normally and the cooling effect is good, it is very important to keep the surface of the condenser clean.For this reason, the condenser should be cleaned frequently to prevent oil, dirt and other debris from attaching to the condenser.When cleaning, be careful not to knock down the condenser fins, let alone damage the tubes.

Evaporator: An air filter is generally installed at the air inlet of the evaporator. The air filter should be cleaned once a week to prevent dust and debris in the car from adsorbing on the air filter and obstructing air circulation, resulting in insufficient cooling capacity .

Air-conditioning pipelines: always check whether the hoses of the air-conditioning system are worn or aging.A large number of rubber hoses are used in the air-conditioning system. If these hoses are worn out, they will burst when the ambient temperature rises and the refrigeration system is working, causing the refrigerant and refrigerating machine oil to leak out and the air-conditioning system will completely fail.If the hose is broken and the air conditioner continues to run, it will cause a large amount of soil and moisture to enter the compressor and other components, making the entire air-conditioning system scrapped.Therefore, you must check the rubber hose frequently, and deal with it in time if there is wear and tear, wrap the broken parts with cloth, stop using the air conditioner, and send it for repair as soon as possible.

Electrical wiring: often check the circuit condition of the air conditioner to prevent the insulation layer of the wire from fraying.When the insurance of the air-conditioning system is burned out, check the fault first, and then replace the fuse to power on after the treatment is completed. The insurance must not be short-circuited, otherwise the entire circuit may be burned out, and other circuits on the car may be damaged. Adverse effects.

空调系统清洗主要是清洗空调通风管路、进行压力检测和蒸发箱的清洗。首先是空调通风管路的清洗除菌，它是空调出风的必经之路，在通风管路壁上的积尘和大量细菌会随着空调通风而吹进车里，所以清洗和除菌是很重要的。其次，压力系统的检测，主要是检查冷媒是否足够，或者是否有泄露。*后是清洗蒸发箱的灰尘。

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