An environmental test apparatus, a refrigeration system control method, and a control device

By controlling the opening of the cold bypass solenoid valve and the expansion valve, and adjusting the operating opening of the expansion valve according to the oil sump and exhaust temperatures, the problem of excessively high compressor exhaust temperature is solved, achieving precise cooling and improving the operational reliability of the refrigeration system and the compressor life.

CN119196023BActive Publication Date: 2026-07-24JIANGSU TUOMILUO ENVIRONMENTAL TEST EQUIP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JIANGSU TUOMILUO ENVIRONMENTAL TEST EQUIP CO LTD
Filing Date
2024-11-08
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Excessive compressor discharge temperature causes lubricating oil temperature to rise, viscosity to decrease, increased wear and heat generation, and affects the normal operation of the refrigeration system.

Method used

By acquiring the compressor's oil sump temperature and discharge temperature, the opening of the cold bypass solenoid valve is controlled, and the initial opening of the expansion valve is determined based on the oil sump temperature and pressure conversion temperature. Combined with the current discharge temperature, the operating opening of the expansion valve is adjusted to achieve precise reduction of the compressor motor temperature and discharge temperature.

Benefits of technology

Precise adjustment of compressor motor temperature and discharge temperature prevents the cold bypass solenoid valve from opening untimely or prematurely, thereby improving the operational reliability of the refrigeration system and the service life of the compressor.

✦ Generated by Eureka AI based on patent content.

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    Figure CN119196023B_ABST
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Abstract

The application discloses an environmental test equipment, a refrigerating system control method and a control device. The control method comprises the following steps: obtaining the oil pool temperature in the compressor and the exhaust temperature of the compressor; opening the cold bypass electromagnetic valve when the oil pool temperature and the exhaust temperature reach the opening condition of the cold bypass electromagnetic valve; determining the initial opening degree of the expansion valve according to the oil pool temperature and the pressure conversion temperature, and adjusting the opening degree of the expansion valve to the initial opening degree, wherein the pressure conversion temperature is determined according to the exhaust pressure of the compressor; obtaining the current exhaust temperature of the compressor, and adjusting the running opening degree of the expansion valve according to the current exhaust temperature; returning to the step of obtaining the current exhaust temperature of the compressor and adjusting the running opening degree of the expansion valve according to the current exhaust temperature every set time period. The application provides an environmental test equipment, a refrigerating system control method and a control device, which can accurately reduce the motor temperature and the exhaust temperature of the compressor when the exhaust temperature of the compressor is too high.
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