Air conditioner and control method

Abstract

The invention provides an air conditioner and a control method. The air conditioner comprises a compressor, an indoor heat exchanger, a throttling element and an outdoor heat exchanger which are sequentially located in air conditioner circulation, the indoor heat exchanger is connected with the throttling element through a first pipeline, and the outdoor heat exchanger is connected with the compressor through a second pipeline; and a first bypass pipeline is arranged between the first pipeline and the second pipeline. According to the air conditioner and the control method, frosting of the outdoor heat exchanger can be effectively delayed, meanwhile, the heating efficiency of the air conditioner is guaranteed, and the comfort of a user is improved.

Description

technical field [0001] The invention belongs to the technical field of air conditioning, and in particular relates to an air conditioner and a control method. Background technique [0002] At present, heat pump air conditioners operate in a low-temperature and high-humidity environment. When the evaporation temperature and the ambient temperature are not higher than 0°C, the moisture in the air will condense on the fins of the outdoor heat exchanger and cause frost. Due to the irreversibility of frost, evaporation will occur. As the temperature continues to drop, the speed of frosting becomes faster and thicker. In order to ensure the reliable operation of the air conditioner, defrosting is required. Most of the current defrosting methods are achieved by controlling the air conditioner to cycle in the cooling mode for a period of time, but this method will cause large fluctuations in the indoor temperature, which will greatly reduce the user's comfort and easily cause custom...

AI Technical Summary

Problems solved by technology

Most of the current defrosting methods are achieved by controlling the air conditioner to cycle in the cooling mode for a period of time, but this method will cause large fluctuations in the indoor temperature, which will greatly reduce the user's comfort and easily cause customer complaints; there are also some air conditioners In this method, the high-temperature refrigerant at the discharge port of the compressor is led to the outdoor heat exchanger or the suction side of the compressor so as to achieve the purpose of defrosting or increasing the evaporation temperature of the compressor. The high-temperature refrigerant at the gas port will reduce the heating efficiency of the air conditioner under heating conditions, which will also lead to the reduction of user comfort

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