High-pressure protection control method and device, air conditioner and computer readable storage medium

Abstract

The invention provides a high-pressure protection control method and device, an air conditioner and a computer readable storage medium. The control method comprises the steps that the high-pressure pressure Pd of a compressor is detected in real time, when it is detected that the high-pressure pressure Pd meets a preset condition, a high-pressure pressure control mode is entered, and the preset condition is that Pd is larger than or equal to Pd '; and according to the high-pressure pressure control mode, the frequency reduction amplitude delta F of the compressor is adjusted according to the high-pressure pressure difference Pd and/or the high-pressure change rate Vt, and the operation frequency of the compressor is reduced, wherein delta Pd is equal to the difference of Pdm and Pd, Pdm is the high-pressure pressure upper limit of the compressor, Pd' is a preset limit value, Pd' is smaller than Pdm, and the high-pressure change rate Vt is the change rate of the high-pressure pressure Pd. Whether the compressor enters the high-pressure pressure control mode or not is judged according to the high-pressure pressure Pd, then the operation frequency reduction amplitude delta F of the compressor is adjusted according to the high-pressure pressure difference delta Pd and/or the high-pressure change rate Vt, the operation frequency of the compressor is effectively controlled, and the situation that when starting is conducted in the high-temperature environment, the high pressure rises excessively, high-pressure protection is excited, and consequently shutdown is caused is avoided.

Description

technical field [0001] The present invention relates to the field of air conditioners, in particular to an anti-high voltage protection control method and device, an air conditioner and a computer-readable storage medium. Background technique [0002] In the high temperature environment, during the start-up process of the inverter air conditioner, the identification of the high pressure of the compressor is not accurate and timely, and it often reports a high-pressure fault during the start-up process. [0003] In order to improve the stability of the compressor at start-up, the frequency reduction or frequency limitation is mainly performed by identifying the pressure, so that the compressor will not be protected due to high pressure, thereby improving the reliability of the system. [0004] In the current control method, because the identification of high pressure is not timely enough, the detection value of the pressure sensor has a hysteresis, the compressor frequency ma...

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Problems solved by technology

[0004] In the current control method, because the identification of high pressure is not timely enough, the detection value of the pressure sensor has a hysteresis, the compressor frequency may be triggered before the high pressure protection is lowered, and the entire system stops running, followed by multiple failed starts, which directly affects the indoor temperature. Adjustment effect, poor user experience

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