Air conditioning defrosting control method and device and air conditioner

Abstract

The invention relates to an air conditioning defrosting control method and device and an air conditioner and belongs to the technical field of air conditioning defrosting. The air conditioning defrosting control method comprises the following steps: when the defrosting condition is met, switching to operate the non-halt defrosting mode, wherein the non-halt defrosting mode comprises that a refrigerant main loop continuously operates heating cycle, and a defrosting bypass branch is utilized to introduce a defrosting refrigerant from the refrigerant main loop into an outdoor heat exchanger to enable the outdoor heat exchanger to defrost; obtaining the operating parameters under the non-halt defrosting mode; judging whether the non-halt defrosting mode operates abnormally according to the operating parameters; and if yes, switching air conditioning defrosting into the reverse defrosting mode, wherein operation of the reverse defrosting mode comprises that the refrigerant main loop operates refrigerating cycle and the defrosting bypass branch is not utilized. Through the air conditioning defrosting control method, the air conditioning operating reliability can be guaranteed to ensure normal air conditioning heating operation.

Description

technical field [0001] The application belongs to the technical field of air conditioner defrosting, and in particular relates to an air conditioner defrosting control method, device and air conditioner. Background technique [0002] The frosting problem of the outdoor heat exchanger has a great impact on the normal heating of the air conditioner in winter. The frosting of the outdoor heat exchanger will not only weaken the heat transfer coefficient of the outdoor unit, but also greatly reduce the heating capacity of the air conditioning system. [0003] As a method of defrosting, for example: an air conditioner and its control method are disclosed in the patent application number CN2018111341417, which provides a non-stop defrosting method, which is specifically embodied as: when the air conditioner judges to enter defrosting , the compressor does not stop, and the four-way valve does not change direction, control the solenoid valve on the defrosting bypass branch to open, ...

AI Technical Summary

Problems solved by technology

[0004] When the air conditioner is defrosting using the non-stop defrosting method provided by the above patent, if the defrosting bypass branch is abnormal, for example, the solenoid valve on the defrosting bypass branch cannot be opened or cannot be opened in place, which will cause the defrosting Refrigerant cannot enter or cannot enter the outdoor heat exchanger smoothly, resulting in the failure of the outdoor heat exchanger to defrost or defrost smoothly, resulting in a decrease in the reliability of the air conditioner, which in turn will affect the subsequent normal heating operation, making the subsequent normal operation Heating operation cannot be achieved, or the heating effect deteriorates sharply

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