A self-adaptive current value control method for a compressor

Abstract

The invention relates to an adaptive current value control method for a compressor. The adaptive current value control method for the compressor comprises a current protection control unit, a temperature sensor and a current detecting unit; in the period that the compressor enters normal work after being started, the adaptive current value control method for the compressor comprises the followingsteps that: (a) the current detecting unit detects an initial working current value I1 of the compressor, and the current protection control unit sets the protection current of the compressor to be I1+M1; and (b) the temperature sensor detects a working environment temperature value, the current detecting unit detects the working current value of the compressor once whenever the current protectioncontrol unit determines that the working environment temperature value changes, the current protection control unit calculates the average value of N records when the N working current value recordsare accumulated each time, wherein the average value is called an average working current value I2, and after that, the current protection control unit modifies the protection current of the compressor to be I2+M2. According to the adaptive current value control method for the compressor, the protection current of the compressor can be automatically regulated according to the change of a working environment temperature, the compressor can be subjected to over-current protection precisely, and the type of protector products is simplified.

Description

Technical field[0001]The invention relates to the technical field of compressor protection, in particular to a compressor adaptive current value control method.Background technique[0002]The compressor is an important part of the cold chain equipment. The working environment temperature of the compressor has a significant impact on it. The working current of the compressor will also change due to changes in the working environment temperature. In order to protect the compressor, Most of the existing methods are to add a protector to the compressor, and the method of the protector to control the protection current of the compressor is to set a protection current for the compressor, and when the working current of the compressor is greater than the protection current, The compressor will automatically stop to avoid burnout; but because the power of the compressor used by the cold chain of different sizes is different, so that each type of compressor must be designed with a protector, w...

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Problems solved by technology

[0002] The compressor is an important part of the cold chain equipment. The working environment temperature of the compressor has a major impact on it. The working current of the compressor will also change due to the change of the working environment temperature. In order to protect the compressor, Most of the existing methods are to add a protector to the compressor, and the method of the protector to control the protection current of the compressor is: to set a protection current for the compressor, when the operating current of the compressor is greater than the protection current, The compressor will stop automatically to avoid burning out; but because the power of the compressors used in cold chains with different sizes is different, so that each type of compressor must be designed with a protector, which leads to the types of protector products. There are many, which increases the production cost of the manufacturer and is not conducive to the development of the manufacturer

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