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Patent Searching and Data


Title:
ELECTRONIC EXPANSION VALVE
Document Type and Number:
WIPO Patent Application WO/2019/154342
Kind Code:
A1
Abstract:
An electronic expansion valve, comprising a valve body (10) and a valve head (20) provided within the valve body. The valve body has a valve cavity (100) and a first valve port (11) in communication with the valve cavity. The valve head is provided within the valve cavity, and is used to control the first valve port on the valve body to open or close. The valve head has a second valve port (21) in communication with the first valve port. A valve spindle (30) is provided within the second valve port of the valve head, and is used control the second valve port on the valve head to open or close. The valve spindle is provided with a flow-through hole (300) to achieve upward communication from a lower portion of the valve spindle to a portion of the valve cavity above the valve head. When the first valve port on the valve body of the electronic expansion valve is used to control a large flow volume, the flow-through hole is used for pressure relief to balance a pressure difference within the cavity of the valve body, thereby ensuring a drive torque of the electronic expansion valve and realizing miniaturization of the valve body structure.

Inventors:
SHAN, Yukuan (Dunan Road, Diankou Town Zhuj, Shaoxing Zhejiang 5, 311835, CN)
SHEN, Qiuyan (Dunan Road, Diankou Town Zhuj, Shaoxing Zhejiang 5, 311835, CN)
HU, Yugang (Dunan Road, Diankou Town Zhuj, Shaoxing Zhejiang 5, 311835, CN)
ZHU, Longjian (Dunan Road, Diankou Town Zhuj, Shaoxing Zhejiang 5, 311835, CN)
Application Number:
CN2019/074514
Publication Date:
August 15, 2019
Filing Date:
February 01, 2019
Export Citation:
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Assignee:
ZHEJIANG DUNAN MACHINERY CO., LTD (Dunan Road, Diankou Town Zhuj, Shaoxing Zhejiang 5, 311835, CN)
ZHEJIANG DUNAN HETIAN METAL CO., LTD (Diankou Industrial Area, ZhujiShaoxing, Zhejiang 5, 311835, CN)
International Classes:
F16K27/02; F16K1/32; F25B41/06
Foreign References:
CN106870750A2017-06-20
CN106594340A2017-04-26
CN208153800U2018-11-27
CN105276197A2016-01-27
US3967781A1976-07-06
JP2003056736A2003-02-26
Attorney, Agent or Firm:
HANGZHOU HUAJIN LIANZHE INTELLECTUAL PROPERTY AGENCY CO., LTD (Room 2104-2105, Hailiang Building No. 1508, Binsheng Road, Binjiang Distric, Hangzhou Zhejiang 1, 310051, CN)
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