Parallel flow air conditioner and defrosting control method thereof

Abstract

The invention relates to a concurrent flow air conditioner and a defrosting control method thereof. The air conditioner comprises an indoor copper tube finned heat exchanger, an outdoor concurrent flow heat exchanger, and a throttling capillary tube and a bypass circuit connected between the concurrent flow heat exchanger and the copper tube finned heat exchanger. The method comprises the following steps: 1) using a temperature sensor to detect the temperature Tx on the temperature concurrent flow heat exchanger; 2) judging whether Tx is smaller than the preset temperature value T1; not switching on the bypass circuit when Tx is larger than T1, and turning on the bypass circuit partly or completely when Tx is smaller than T1; and 3) cycling the step 2 after a period of time. The concurrent flow air conditioner and the defrosting control method thereof have the advantages that the air conditioner can defrost uninterruptedly, thereby improving the heating comfort; the bypass circuit canbe turned on partly or completely according to the defrosting requirements, thereby realizing bypass defrosting without interrupting the heating process; relevant parameters are characterized by selfadaptation and self modification, and the air conditioner has simple control and obvious technical effects.

Description

technical field [0001] The invention belongs to the technical field of refrigeration, in particular to a parallel flow air conditioner and a defrosting control method thereof. Background technique [0002] When the air conditioner is in heating operation, and under certain temperature and humidity conditions, the outdoor evaporator is easy to frost. Especially when the parallel flow is used as the outdoor evaporator, it is easier to frost; in addition, when the parallel flow is used as the outdoor evaporator, the frosting cycle of the air conditioner is short, the defrosting time is long and the defrosting is not clean, which affects the heating effect. At present, the defrosting method commonly used by air conditioners is four-way valve reversing, that is, when heating, the outdoor parallel flow evaporator of the air conditioner is converted into a condenser during cooling operation. This kind of heating and cooling alternately changes operation, and cold air will blow in ...

AI Technical Summary

Problems solved by technology

This kind of heating and cooling alternately changes operation, and cold air will blow in the room, which will affect the heating effect.

When the parallel flow is used as the outdoor evaporator, the alternating operation of heating and cooling will be more frequent, the heating effect of the air conditioner will be worse, and the comfort of heating will be worse.

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