Air-conditioner defrosting control method and air-conditioner

Abstract

The invention provides an air-conditioner defrosting control method and an air-conditioner. The air-conditioner comprises a compressor, an indoor side heat exchanger, a flash evaporator, a first throttling element, a first two-way valve and an outdoor side heat exchanger. In a heating mode, the first throttling element is started, the first two-way valve is closed, refrigerant sequentially passesthrough the compressor, the indoor inner side heat exchanger, the flash evaporator, the first throttling element and the outdoor side heat exchanger, and returns into the compressor to form a circulating passage. In a defrosting mode, the first throttling element is closed, the first two-way valve is opened, and the refrigerant sequentially passes through the compressor, the indoor side heat exchanger, the flash evaporator, the first two-way valve and the outdoor side heat exchanger, and returns to the compressor to form a circulating passage. According to the air-conditioner defrosting control method, in the defrosting mode, the indoor side heat exchanger keeps non-stop heating, all refrigerant participates heat exchange, indoor temperature fluctuations can be reduced, and the heating comfort is improved.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to an air conditioner defrosting control method and the air conditioner. Background technique [0002] When the existing air conditioner operates at a low temperature for heating, because the outdoor evaporation temperature is lower than 0°C, it often causes frost on the outdoor heat exchanger, resulting in attenuation of heating capacity. In order to ensure the heating effect, the air conditioner needs to defrost in stages. During defrosting, the four-way valve of the heating cycle system usually needs to be reversed, and the internal fan is turned off. Therefore, during the defrosting process, the indoor side heat exchanger has no heat output. It will cause the indoor temperature to drop. Contents of the invention [0003] In view of this, the present invention aims to propose a defrosting control method for an air conditioner, so that in the defrosting mode, the indoo...

AI Technical Summary

Problems solved by technology

[0002] When the existing air conditioner is running at a low temperature for heating, because the outdoor evaporation temperature is lower than 0°C, it often causes frost on the outdoor heat exchanger, resulting in attenuation of heating capacity

In order to ensure the heating effect, the air conditioner needs to defrost in stages. During defrosting, the four-way valve of the heating cycle system usually needs to be reversed, and the internal fan is turned off. Therefore, during the defrosting process, the indoor side heat exchanger has no heat output. will cause the indoor temperature to drop

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