Compressor protection method for air conditioner

Abstract

The invention discloses a compressor protection method for an air conditioner, which is characterized by comprising the following operating steps of: 1, starting up, and beginning to count through a counter in the air conditioner, wherein N is equal to 0; 2, running; 3, switching on a compressor relay by using an electric control device of the air conditioner, and beginning to detect the current of the whole machine after t seconds, wherein the value range of the t is 1 to 100 seconds, and steps 4 and 7 are to be executed simultaneously; and 4, judging whether the current is smaller than a safety value I2, if so, entering a step 5, otherwise returning to the step 2. The conventional air conditioner system is not needed to be modified, and a software control part is needed to be modified only, so the compressor of the air conditioner can be ensured not to be burnt out under the abnormal condition and the aim of protecting the compressor is achieved; and the compressor has the advantages of simple and reasonable structure, flexible operation, high safety degree and wide application range.

Description

technical field [0001] The invention relates to a method for protecting a compressor, in particular to a method for protecting a compressor of an air conditioner. Background technique [0002] The compressor is the core component of the household air conditioner. When there is a problem with the system, if the protection is not good, the compressor will be burned out. , tends to burn out the compressor. [0003] In the current design of household air conditioners, the protection of the system under normal conditions is considered, but there is no setting for the protection of the compressor under abnormal conditions. In the existing design, see Figure 2, the first is to start and run, and then to detect the current of the whole machine. If the compressor is stuck due to various reasons, but the electronic control device still energizes the compressor, the current is abnormally large. When the current is greater than the safe value I1, the OLP protector of the compressor wi...

AI Technical Summary

Problems solved by technology

[0005] When the compressor is stuck, the electronic control device closes the compressor relay 4, and the compressor 6 is energized, but due to the stuck cylinder, the compressor 6 fails to operate normally, and the instantaneous current is very large, which is greater than the safety value I1, and the compressor OLP protection But at this time, the main chip in the electronic control device remembers that the compressor is still on, and the compressor relay 4 is still energized. After the OLP protector 11 is activated, it waits for a period of time and closes it again. This waiting time is the same as The ambient temperature is related. When it is closed again, the OLP protector 11 will act again. If this continues, the motor of the compressor will be burned out

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