The method of judging the liquid in the suction of the compressor and the control method of the refrigerant circulation system

A technology of a refrigerant circulation system and a control method, which is applied to the control of the refrigerant circulation system and the field of judging the suction of the compressor with liquid, can solve the problems of limited application scope and increased production cost, and achieves the solution to the problem of suction with liquid and prevention. The effect of inspiratory fluid conditions

Active Publication Date: 2019-09-20
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using this method to judge the situation of suction liquid, it is necessary to install multiple pressure sensors, resulting in increased production costs and limited application range

Method used

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  • The method of judging the liquid in the suction of the compressor and the control method of the refrigerant circulation system

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Embodiment Construction

[0035] The present invention is described below based on the embodiments, and those skilled in the art should understand that the drawings provided here are for the purpose of illustration, and the drawings are not necessarily drawn to scale.

[0036] Unless the context clearly requires, throughout the specification and claims, "comprises", "comprises" and similar words should be interpreted in an inclusive sense rather than an exclusive or exhaustive meaning; that is, "including but not limited to" meaning.

[0037] like figure 1 As shown, the present application provides a control method of a refrigerant circulation system, and the control method includes a method of judging that the suction of the compressor is filled with liquid. A compressor, a condenser, an evaporator and a control valve are arranged on the refrigerant flow path of the refrigerant circulation system. Preferably, the control valve is an electronic expansion valve for controlling the refrigerant flow rate...

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Abstract

The invention provides a method for judging compressor suction with liquid and a control method for a refrigerant circulation system. A compressor, a condenser and an evaporator are arranged on the refrigerant flow path of the refrigerant circulation system. When the compressor is running stably , through the compressor discharge temperature T 排 and the temperature T of the refrigerant in the condenser 冷 , The temperature T of the refrigerant in the evaporator 蒸 , the suction temperature T of the compressor 吸 and the ambient temperature where the condenser is located T 环 Determine whether the compressor is sucked with liquid. The method for judging the liquid in the suction of the compressor provided in the present application can accurately judge whether the liquid in the suction occurs during the operation of the compressor without adding additional detection devices and without increasing the cost.

Description

technical field [0001] The invention relates to the field of control methods for a refrigerant circulation system, in particular to a method for judging compressor suction with liquid and a control method for a refrigerant circulation system. Background technique [0002] When the compressor is running with liquid in the suction, a large amount of liquid refrigerant enters the compression cavity of the compressor, causing the compressor to compress with liquid and cause liquid shock. At the same time, since a large amount of liquid refrigerant enters the compressor and is compressed, a large amount of lubricating oil is dissolved in the refrigerant and taken out of the compressor, causing the compressor to be compressed without lubricating oil, resulting in a decrease in the performance of the compressor, and more seriously, causing the cylinder to be damaged. There is no oil lubrication in the gap between the compressors, and long-term operation without lubricating oil can ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): F25B49/02F25B41/00F25B43/00
CPCF25B41/00F25B43/00F25B49/022
Inventor冯青龙黄志辉邹云辉陈锐东廖永富梁玉林
OwnerGREE ELECTRIC APPLIANCES INC