Air conditioner and control method of air conditioner

Abstract

The invention provides an air conditioner and a control method of the air conditioner and relates to the technical field of air conditioners. The air conditioner and the control method of the air conditioner solve the problem that during defrosting mode running of an existing air conditioner, a unit is not provided with an evaporator, and consequently liquid impact damage to a compressor is likelyto be caused. The air conditioner comprises a first heat exchanger, a second heat exchanger, a first pipeline and a second pipeline. The two ends of the first pipeline are connected with the two endsof a first throttling device correspondingly. The second pipeline is connected between the first outlet end of a four-way valve and a gas-liquid separator in parallel. A second throttling device is arranged on the second pipeline, and an evaporator is connected between the outlet end of the second pipeline and the gas-liquid separator in series. The evaporator is additionally arranged so that during defrosting mode running, gas-liquid two-phase refrigerants are evaporated into gas refrigerants, gas and liquid separation is achieved after the gas refrigerants pass through the gas-liquid separator, liquid impact damage to the compressor cannot be caused, and reliability of the unit is greatly improved. In addition, in the refrigerating mode and the heating mode, the evaporation temperatureis increased after the evaporator is additionally arranged, and the capability of the unit is improved.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to an air conditioner and a control method for the air conditioner. Background technique [0002] When the air conditioning system is in heating operation, the refrigerant absorbs heat and evaporates in the heat exchanger of the external unit. Under certain outdoor temperature and humidity conditions, the water vapor in the air will gradually condense on the tube wall and fins of the heat exchanger of the external unit. The accumulated frost layer will reduce the heat transfer coefficient of the heat exchanger of the external unit, thereby reducing the heating effect of the system. Therefore, it is necessary to defrost the heat exchanger of the external machine. The current defrosting method is to change the flow path of the refrigerant so that the high-temperature and high-pressure refrigerant flows through the heat exchanger of the external unit to release heat and conde...

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Problems solved by technology

[0005] The purpose of the present invention is to provide an air conditioner and a control method for the air conditioner, so as to solve the technical problem existing in the prior art that the unit does not have an evaporator when the defrosting mode is running, and the compressor is easily damaged by liquid hammer

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