Shedding detecting method and system of refrigerating system exhaust temperature sensor

Abstract

The invention relates to the technical field of refrigerating systems, and provides a shedding detecting method of a refrigerating system exhaust temperature sensor to solve the problem that the precision of exhaust temperature sensor shedding detecting in an existing refrigerating system is not high. The refrigerating system exhaust temperature sensor shedding detecting method includes the following steps that the parameter change rate of a compressor motor and the temperature value of an exhaust temperature sensor are obtained in real time; the temperature value of a machine winding is calculated according to the parameter change rate, and the difference value of the temperature value of the machine winding and the temperature value of the exhaust temperature sensor is calculated; and ifthe difference value of the temperature value of the machine winding and the temperature value of the exhaust temperature sensor is larger than a preset threshold value, an alarming signal that the exhaust temperature sensor of a compressor is shed can be sent. The distance between the inner part of the compressor and an exhaust port, thus it is avoided that the temperature of a heat exchanger coil pipe, the pipeline length between exhaust pipes of the compressor, the environment temperature and the opening of a valve body affect the temperature value in the prior art, thus the shedding detecting of the exhaust temperature sensor is more precise, and the shedding detecting method of the refrigerating system exhaust temperature sensor is suitable for a direct current frequency conversion air conditioner system.

Description

technical field [0001] The invention relates to the technical field of refrigeration systems, in particular to a temperature sensor drop-off detection method and system. Background technique [0002] The refrigeration system is composed of a compressor, a condenser, a throttling device, an evaporator, an electric control system, and a temperature sensor. The pipeline system is connected and sealed by metal pipes, and the interior is filled with refrigerant. Mainly, the compressor completes the process from suction to exhaust through the operation of the motor. The normal operation of the refrigeration system requires the control of the electronic control system, and the control source requires accurate and reliable measurement values ​​​​of the temperature sensor. Once the temperature sensor falls off, the correct temperature value of the refrigerant cannot be obtained, which will cause the system control to go out of control, which will not only affect the user's use effect...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the detection accuracy of the exhaust temperature sensor of the existing refrigeration system is not high, and to propose a detection method and system for the discharge temperature sensor of the refrigeration system

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