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Control method for electronic expansion valve of refrigerating system and refrigerating system

A technology of electronic expansion valve and control method, which is applied in the field of refrigeration system control and electronic expansion valve control, and can solve the problems of high exhaust temperature of refrigeration system and failure of normal and reliable operation, and achieve the effect of reliable operation

Active Publication Date: 2015-10-07
GREE ELECTRIC APPLIANCES INC
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the refrigeration system in the prior art cannot operate normally and reliably due to the high temperature of the exhaust gas under high temperature conditions.

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  • Control method for electronic expansion valve of refrigerating system and refrigerating system
  • Control method for electronic expansion valve of refrigerating system and refrigerating system

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Embodiment Construction

[0050] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the protection scope of the present invention.

[0051] Such as figure 1 As shown, the present invention provides a refrigeration system, which includes a refrigeration cycle circuit, in which a compressor 101 , an electronic expansion valve 104 , an outdoor heat exchanger 105 and an indoor heat exchanger 103 are arranged.

[0052] Further, the refrigeration system also includes: an outdoor environment temperature sensing package (not shown) arranged on the outdoor heat exchanger 105 to detect the outdoor ambient temperature and an outdoor heat exchanger temperature sensor to detect the temperature of the outdoor heat exchanger. bag (not shown); be arranged on the indoor heat exchanger 103 in order to detect ...

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Abstract

The invention provides a control method for an electronic expansion valve of a refrigerating system. The method comprises the steps that firstly, whether the current work condition belongs to the high-temperature work condition or not is judged according to the outdoor environment temperature Tout and the exhaust temperature Td of a compressor, if yes, the third step is executed, and if not, conventional control is executed; thirdly, the aperture P of the electronic expansion valve is increased. According to the control method, compressor frequency reducing even protection shutdown and other situations of the refrigerating system due to the overhigh exhaust temperature under the high temperature work condition can be effectively prevented, and normal and reliable running of the compressor is achieved. The invention further relates to the refrigerating system.

Description

technical field [0001] The invention relates to a control method for an electronic expansion valve of a refrigeration system, and belongs to the technical field of refrigeration system control. The invention also relates to refrigeration systems. Background technique [0002] In the existing refrigeration system, for the control of the electronic expansion valve, the PID closed-loop feedback control method based on the detection of the exhaust temperature is mostly used at present. This control method can quickly and accurately realize the opening degree control of the electronic expansion valve. At present, the commonly used refrigerants are R22 and R410A, etc., both of which are transitional refrigerants. The main problem of R22 is that it contains chlorine, which will destroy the ozone layer of the atmosphere; R410A is a mixed refrigerant, and its GWP (global warming potential) reaches 2100. The cost is also high. Therefore, a new refrigerant has emerged in the field of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B49/02F25B41/04F25B41/20
CPCF25B49/02F25B2600/2513
Inventor 郑波梁祥飞庄嵘
Owner GREE ELECTRIC APPLIANCES INC
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