Air-conditioning heating is not oil-free, but the oil consumption is very low and can be basically ignored, while refrigeration needs energy consumption (oil consumption). ?
Because the heating device of most cars is a warm air tank connected with the cooling water channel of the engine, the cooling liquid that takes away heat from the engine flows through this warm air tank, which acts as a water heater, and the blower sends the heated warm air into the compartment to complete air conditioning and heating. Therefore, air conditioning heating does not consume the energy of the engine itself, but the energy of a refrigeration system is reused, so no energy is consumed. ?
Working principle of automobile air conditioner
Automobile air conditioning refrigeration system consists of compressor, condenser, liquid storage dryer, expansion valve, evaporator and blower. Copper pipes and high-pressure rubber pipes are connected into a closed system. When the refrigeration system works, the refrigerant circulates in the closed system in different states.
There are four basic processes in each cycle:
1. Compression process: the low-temperature and low-pressure refrigerant gas at the evaporator outlet is sucked, compressed into high-temperature and high-pressure gas, and discharged from the compressor.
2. Heat dissipation process: superheated refrigerant gas with high temperature and high pressure enters the condenser, and is condensed into liquid to dissipate heat through the reduction of pressure and temperature.
3. Throttling process: After the high-temperature and high-pressure refrigerant liquid passes through the expansion device, the volume becomes larger, the pressure and temperature drop sharply, and it is discharged from the expansion device in the form of fine droplets.
4. Heat absorption process: misty refrigerant liquid enters the evaporator, and the boiling point of the refrigerant is much lower than the temperature in the evaporator, so the refrigerant liquid evaporates into gas.