Air conditioner defrosting device and control method

Abstract

The invention provides an air conditioner defrosting device and a control method. The air conditioner defrosting device comprises a judgment module and a control module, the judgment module is used for judging whether an air conditioner starts to be frosted or not and judging whether the frosting amount exceeds a first preset value or not, and the control module enters a defrosting action when theair conditioner starts to be frosted and the frosting amount exceeds the first preset value. Trough the air conditioner defrosting device, the air conditioner can be judged from the two aspects and angles of whether the air conditioner is frosted or not and the frosting amount, thus the defrosting step or action is started when the air conditioner is frosted and the frosting amount reaches a certain value, the situations that most of the surfaces of fins are frosted but a frosting instruction is not issued, or the surfaces of fins are not frosted or slightly frosted but defrosting is conducted, consequently unnecessary defrosting is conducted, and the performance of the air conditioner is affected are avoided, the problem of inaccurate defrosting judgment is effectively solved, the situation of mis-defrosting is effectively avoided, and a better heating effect is provided for indoor personnel.

Description

Technical field [0001] The invention belongs to the technical field of air conditioners, and specifically relates to an air conditioner defrosting device and a control method. Background technique [0002] When the heat pump air conditioner is in heating operation, once the surface temperature of the outdoor heat exchanger is lower than the dew point and freezing point of the air at the same time, frost will form, which will deteriorate the heat exchange conditions and reduce the performance of the system. To ensure the normal operation of the unit, the defrosting operation must be Indispensable. [0003] The existing defrost control methods mainly include: defrost temperature defrost control method, evaporation temperature defrost control method, air pressure difference defrost control method, maximum average heating capacity defrost control method, fan current control defrost method, temperature difference defrost method Frost control method or a combination of several methods t...

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the inaccurate defrosting judgment of the outdoor unit of the air conditioner in the prior art, resulting in failure to issue a defrosting command in time, causing the defrosting time to be too long or not cleaned, or not entered Defrost conditions are abnormally judged and cause unnecessary defrost operations, thereby providing an air-conditioning defrost device and control method

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