Air conditioner and control method of air conditioning refrigerants

Abstract

The invention provides an air conditioner and a control method of air conditioning refrigerants. The air conditioner comprises a compressor, a condenser, a throttling device, an evaporator and a liquid storage tank which are connected through a refrigeration pipeline, wherein a gaseous refrigerant flow path is arranged between the throttling device and the liquid storage tank; a part of a gaseous refrigerant or all the gaseous refrigerant flowing out of the throttling device flows into the liquid storage tank through the gaseous refrigerant flow path; and other refrigerants flowing out of the throttling device flow into the liquid storage tank after flowing through the evaporator for heat exchange. According to the air conditioner, the gaseous refrigerant flow path is arranged, so that a part of the gaseous refrigerants or all the gaseous refrigerant flowing out of the throttling device is enabled to flow into the liquid storage tank through the gaseous refrigerant flow path, so that the dryness of the inlet of the evaporator is reduced, the heat exchange efficiency of the evaporator is improved, and the refrigeration performance of the air conditioner is improved; and besides, the dryness of the inlet of the evaporator is low, so that the divided flow of the refrigerants in the evaporator is relatively good, the refrigerant flowing noise generated by a flow divider is greatly reduced, and a water blowing phenomenon of the air conditioner in a high humidity condition is avoided.

Description

technical field [0001] The invention belongs to the technical field of air conditioners, and in particular relates to an air conditioner and a method for controlling an air conditioner refrigerant. Background technique [0002] The air conditioning and refrigeration system is generally composed of a condenser, an evaporator, a compressor, and a throttling mechanism. The refrigerant circulates in the refrigeration system to realize the refrigeration function of the air conditioner. In the existing air conditioner, the liquid refrigerant flowing out of the condenser becomes a low-temperature and low-pressure gas-liquid two-phase mixed refrigerant after being throttled by the throttling device, and then directly flows into the evaporator. Dryness is high, and vice versa. If the inlet dryness of the evaporator is high, the gaseous refrigerant entering the evaporator will occupy a larger heat exchange space, resulting in a smaller heat exchange space occupied by the liquid refri...

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Problems solved by technology

If the inlet dryness of the evaporator is high, the gaseous refrigerant entering the evaporator will occupy a larger heat exchange space, resulting in a smaller heat exchange space occupied by the liquid refrigerant; and because the heat exchange effect of the evaporator depends on the two-phase region The boiling heat transfer will absorb a lot of heat, while the gaseous refrigerant will not boil, but will simply increase the temperature, so the heat transfer effect of the gaseous refrigerant is worse than that of the liquid refrigerant, and under the same refrigerant state, the pressure loss is large , so the heat transfer efficiency of the evaporator is reduced, the overall cooling effect of the evaporator becomes worse, and the cooling performance of the air conditioner is affected.

In addition, because the flow rates of gaseous and liquid refrigerants are different, if the dryness of the evaporator inlet is too high, that is, there are too many gaseous refrigerants, it will cause large deviations when the evaporator is distributed to each flow path, making the heat transfer of the air conditioner The efficiency is low, which affects the refrigeration performance of the air conditioner; and when the refrigerant entering the evaporator flows through the splitter of the evaporator, it will produce a loud flow sound

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