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Electronic expansion valve control method and device and refrigerating/heating system

A technology of electronic expansion valve and heating system, which is applied in the field of control and can solve problems such as reducing the reliability of compressor operation

Active Publication Date: 2015-03-25
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The inventor found in the process of realizing the present invention that after the economizer function is turned on, the system high pressure, low pressure, compressor current, and compressor load will increase accordingly. If the economizer electronic expansion valve is not adjusted after the economizer is turned on, the compressor will easily In case of over-range operation, the reliability of compressor operation is seriously reduced

Method used

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  • Electronic expansion valve control method and device and refrigerating/heating system
  • Electronic expansion valve control method and device and refrigerating/heating system
  • Electronic expansion valve control method and device and refrigerating/heating system

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Embodiment Construction

[0079] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0080] The electronic expansion valve control method and device provided by the embodiments of the present invention are applied to refrigeration / heating systems, and the refrigeration / heating system is provided with an economizer and an economizer electronic expansion valve, that is, the electronic expansion valve provided by this application The expansion valve control method and device are suitable for refrigeration / heating systems with economizers.

[0081...

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Abstract

The embodiment of the invention provides an electronic expansion valve control method and device and a refrigerating / heating system. The opening degree of an electronic expansion valve of an economizer is adjusted according to the operating load of a compressor and the system state including the superheat degree of the economizer, pressure of an air inlet of a pressure cavity of the compressor, pressure of an exhaust port of the compressor, pressure of an air suction port of the compressor and currents of the compressor, and accordingly, the probability that the compressor operates out of range is lowered, capacity of the economizer is brought into full play, the capacity and energy efficiency of a whole machine are promoted, and operational reliability of the compressor and the whole machine are improved.

Description

technical field [0001] The present invention relates to the technical field of control, and more specifically, relates to an electronic expansion valve control method, device and refrigeration / heating system. Background technique [0002] In the application of air-cooled hot and cold water units, in order to improve the energy efficiency and capacity of the unit, a refrigeration / heating system with an economizer (such as a plate heat exchanger) cycle is often used. The compressor in the refrigeration / heating system is supplemented with air through the economizer, which can realize quasi-two-stage compression, thereby improving the operating characteristics of the compressor. The operating principle of the economizer is: the high-pressure liquid refrigerant from the condenser enters the economizer, and the refrigerant output from the economizer is divided into two paths, one path enters the evaporator after throttling through the electronic expansion valve of the system; Aft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B49/02
CPCF25B49/02F25B2600/2513
Inventor 程琦陈培生黄凯亮钟海玲王建凯
Owner GREE ELECTRIC APPLIANCES INC
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