Air conditioner capable of improving low-temperature heating capacity and control method thereof

Abstract

The invention discloses an air conditioner capable of improving low-temperature heating capacity, comprising a compressor and an air-supplying enthalpy-increasing device connected between an exhaust pipe and a return pipe of the compressor. The exhaust pressure is improved through an air-supplying enthalpy-increasing circuit under low outdoor ambient temperature so as to improve low-temperature heating capacity and obtain better low-temperature heating effect. The invention also discloses a control method of the air conditioner capable of improving the low-temperature heating capacity. When the outdoor ambient temperature is lower than a certain temperature t1, the air-supplying enthalpy-increasing device is turned on, the high-pressure high-temperature gas in the exhaust pipe of the compressor is changed into the low-pressure high-temperature gas after pressure reduction through the air-supplying enthalpy-increasing circuit; the low-pressure high-temperature gas returns to a return air inlet of the compressor through the air-supplying enthalpy-increasing circuit; because relative high-temperature gaseous refrigerant at the return air inlet of the compressor is increased, the return pressure of the compressor rises, and the exhaust pressure further rises. In the invention, the exhaust pressure rises, the condensing pressure is improved, the condensing temperature is improved, and the heating capacity is increased.

Description

technical field [0001] The invention relates to the technical field of air conditioners in electrical equipment, and more specifically relates to an air conditioner capable of increasing low-temperature heating capacity and a control method thereof. Background technique [0002] When the heating and cooling air conditioner is in heating operation when the outdoor temperature is low, the difference between the evaporating temperature and the outdoor temperature is small, and the heat transfer performance of the evaporator becomes poor. At this time, although the double pressure of the condensing pressure and the evaporating pressure is large, but, Due to the low evaporating pressure, the condensing pressure is relatively low after being compressed by the compressor, the condensing temperature is low, the temperature difference with the room is small, the heat transfer performance of the condenser is also relatively poor, the heating capacity is small, and the outlet air temper...

AI Technical Summary

Problems solved by technology

Due to the low outdoor temperature and low evaporation pressure, it is difficult to increase the suction pressure

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