Air-conditioner defrosting method

Abstract

The invention discloses a method for air conditioner defrosting, which comprises the following steps, first, a pipeline is added between an air discharge pipe of a compressor and an air inlet pipe of a condensator in advance, and a magnetic valve is arranged on the pipeline, second, the temperature of a coil pipe of the condensator and temperature of outdoor environment are detected, third, a defrosting operation is judged to be operated or not according to the temperature of the coil pipe of the condensator and the outdoor environment, if the defrosting operation is needed, the fourth step is executed, otherwise the second step is executed, fourth, the magnetic valve is controlled to open, the frequency of the compressor is controlled to reduce to a first predetermined value, a four-way change-over valve is controlled to change into a refrigerating operation, fifth, the compressor is controlled to make an indoor set convert up to a second predetermined value according to the first predetermined speed, sixth, the temperature of the condensator is judged to detect whether the temperature is satisfied for a condition of the defrosting withdrawal, if satisfied, the seventh step is operated, otherwise, the fifth step is operated, seventh, the magnetic valve is closed, the compressor is controlled to convert down to a third predetermined value according to the second predetermined speed, and the four-way change-over valve is controlled to change to a heat-producing operation. The invention provides a method for air conditioner defrosting, which solves the problem that the period of defrosting for an air conditioner is longer, and defrosting effect of the air conditioner is influenced.

Description

technical field [0001] The invention relates to a method for defrosting an air conditioner. Background technique [0002] When the air conditioner performs low-temperature heating in winter, the condenser will generate frost, which will affect the heating effect of the air conditioner. When using shutdown refrigeration to melt the frost on the condenser, it will affect the corresponding indoor temperature. This defrosting method cannot meet the user's heating requirements in winter. [0003] At present, the defrosting method adopted by most air conditioners is to switch the four-way valve to the cooling operation state after shutting down, and at the same time, the indoor and outdoor fans stop running. During the defrosting process, the air conditioner stops heating operation. This will affect the heating effect of the air conditioner, making the temperature of the corresponding room drop. [0004] Since the condenser will frost during low-temperature heating in winter, ...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for defrosting an air conditioner, which is used to solve the technical problem in the prior art that the defrosting period of the air conditioner is relatively long, which affects the defrosting effect of the air conditioner.

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