Air conditioner defrosting control method

Abstract

The invention provides a defrost control method for an air conditioner. The defrost control method for the air conditioner comprises the following steps: after receiving a defrost signal, controllingthe air conditioner to enter a defrost mode and recording the defrosting duration needed by defrosting; judging whether the defrosting durations of every two adjacent defrost modes among continuous preset quantity of defrost modes are prolonged or not; if so, determining a defrost signal according to a first preset defrosting condition; and otherwise, determining a defrost signal according to a second preset defrosting condition. According to the defrost control method for the air conditioner, by prolonging the defrosting times and defrosting the air conditioner after a certain quantity of periods, the condition of entering the defrost modes is changed, for example, the air conditioner is defrosted according to first-time electrified control, so that frosting of a chassis of an outdoor unit is prevented. The air conditioner is defrosted thoroughly, the chassis is free of residual frost, and the problem that the chassis of an outdoor unit is frosted when the air conditioner is in a long-term heating operation, in particular, when the outdoor temperature is relatively low and the outdoor humidity is relatively high, can be prevented effectively.

Description

technical field [0001] The invention relates to the field of air conditioning refrigeration and heating, in particular to an air conditioner defrosting control method. Background technique [0002] When the air conditioner is running for heating for a long time, especially when the outdoor temperature is relatively low and the humidity is relatively high, it will often run continuously for a long time, and the chassis of the outdoor unit will often experience serious frost. In some cases, there will be residual frost on the chassis of the outdoor unit after defrosting, which will cause frost on the heat exchanger of the outdoor unit after long-term operation, thereby affecting the heating effect of the air conditioner. Under normal circumstances, after the air conditioner receives the signal to start defrosting, the four-way valve changes direction, and the refrigerant flows from the compressor to the condenser and then to the evaporator and then returns to the compressor. S...

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Problems solved by technology

[0004] Based on the above situation, the inventor found that the above technical solution has the following problems: when the air conditioner operates continuously for a long time, especially when the outdoor temperature is relatively low and the humidity is relatively high, severe frost often occurs on the chassis of the outdoor unit. , leading to slow defrosting process. When the outdoor temperature is relatively low, there will be residual frost on the chassis of the outdoor unit after defrosting. After long-term operation, it will cause frost on the heat exchanger of the outdoor unit, which will affect the heating effect of the air conditioner.

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