Control method and device for air conditioner defrosting and air conditioner

Abstract

The invention relates to the technical field of air conditioner defrosting, and discloses a control method and device for air conditioner defrosting and an air conditioner. The control method comprises the following steps: controlling to increase the flow opening degree of a throttling device of the air conditioner under the condition that the air conditioner needs to be defrosted; obtaining a refrigerant inlet liquid temperature difference value of an outdoor heat exchanger and a preset position temperature of the outdoor heat exchanger; and controlling to stop increasing the flow opening degree of the throttling device under the condition that the refrigerant inlet liquid temperature difference value and the preset position temperature meet the defrosting exit condition. The time for theair conditioner to exit the defrosting is comprehensively judged according to the refrigerant inlet temperature difference value and the preset position temperature of the outdoor heat exchanger, sothat the control precision for controlling the air conditioner to exit defrosting is effectively improved; and through increasing the flow opening degree of the throttling device and changing the refrigerant temperature and pressure in a refrigerant circulation loop, the refrigerant finally flowing into the outdoor heat exchanger for defrosting can achieve a relatively good defrosting effect.

Description

technical field [0001] The present application relates to the technical field of air conditioner defrosting, for example, to a control method and device for air conditioner defrosting, and an air conditioner. Background technique [0002] At present, most of the mainstream models of air conditioners have the heat exchange function of cooling and heating. Increase the temperature of the indoor environment; during the heating process of the air conditioner, the outdoor heat exchanger of the outdoor unit acts as an evaporator that absorbs heat from the outdoor environment. Affected by the temperature and humidity of the outdoor environment, the outdoor heat exchanger It is easy to condense more frost on the heater, and when the frost accumulates to a certain thickness, the heating capacity of the air conditioner will become lower and lower. Therefore, in order to ensure the heating effect and avoid excessive frost condensation, it is necessary to The outdoor heat exchanger is ...

AI Technical Summary

Problems solved by technology

[0007] Embodiments of the present disclosure provide a control method and device for defrosting an air conditioner, and an air conditioner to solve the problem that the method of judging whether to exit the defrosting mode in the related art is too rough, and it is easy for the air conditioner to exit the defrosting mode in advance and cause defrosting failure. Complete, or technical problems that affect the normal heating performance of the air conditioner by continuing to run the defrost mode after the defrost is complete

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