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Patent Searching and Data


Title:
CONTROL METHOD AND DEVICE FOR USE IN ELECTRONIC EXPANSION VALVE, AND COOLING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2018/107982
Kind Code:
A1
Abstract:
A control method and device for use in a electronic expansion valve, and a cooling system, wherein the control method comprises: obtaining a temperature difference Tp at end portions of an evaporator; comparing Tp with a target value Ts used for controlling the temperature difference at the end portions of the evaporator, so as to obtain a difference value ΔTp between the two; determining an opening degree value of an electronic expansion valve on the basis of a relationship between ΔTp and a preset deviation value; controlling the opening degree of the electronic expansion valve, and adjusting the same to the determined opening degree value. The present method detects a real-time value of a temperature difference Tp at end portions of an evaporator, and then compares the real-time Tp value with a target control value Ts used for controlling the temperature difference at the end portions of the evaporator; if a difference △Tp between the two is larger than the deviation allowed, then the opening degree of an valve will be increased, and if the difference is smaller than the deviation allowed, the opening degree of the valve will be decreased; thus, changes in the opening degree of the electronic expansion valve may be regulated, which allows for the most appropriate liquid supply amount to be provided to the evaporator, and minimizes the temperature difference Tp between heat exchanging ends of the evaporator, thus ensuring that the heat exchanging performance of the evaporator is given full play.

Inventors:
GU YANTAO (CN)
WANG JING (CN)
ZHANG YONG (CN)
YANG HAITAO (CN)
LI FENG (CN)
Application Number:
PCT/CN2017/114315
Publication Date:
June 21, 2018
Filing Date:
December 01, 2017
Export Citation:
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Assignee:
CHONGQING MIDEA GENERAL REFRIGERATION EQUIPMENT CO LTD (CN)
MIDEA GROUP CO LTD (CN)
International Classes:
F25B41/34
Foreign References:
CN106595141A2017-04-26
CN104913459A2015-09-16
CN101408355A2009-04-15
CN101901017A2010-12-01
CN1683848A2005-10-19
Attorney, Agent or Firm:
TSINGYIHUA INTELLECTUAL PROPERTY LLC (CN)
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