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Patent Searching and Data


Title:
ELECTRONIC EXPANSION VALVE ALSO USEABLE AS CHECK VALVE AND COOLING/HEATING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2018/101780
Kind Code:
A2
Abstract:
The present invention relates to an electronic expansion valve also useable as a check valve and a cooling/heating system. According to an example, proposed is an electronic expansion valve also useable as a check valve, comprising: a body housing having a first port, a second port, and a lower-end fastening hole; an operation assembly that is installed inside the body housing and has an elevating rod; an orifice assembly installed on the lower side of the interior of the body housing through the lower-end fastening hole, the orifice assembly having an orifice housing that has a housing through-hole formed through the periphery thereof so as to form a second port and a channel, an orifice hole being formed on the upper end portion of the orifice assembly, a third port being formed inside the lower side of the orifice assembly, and the orifice assembly being configured to block the orifice hole when the elevating rod ascends and to expose the orifice hole when the elevating rod descends such that, by forming a channel between the second or third port and the first port, the orifice assembly performs an expansion valve function; a check valve switching unit installed in an annular distancing space between the upper periphery of the orifice assembly and the interior of the body housing, the check valve switching unit being configured to prevent a fluid introduced through the first port from passing through the annular distancing space when the elevating rod descends and to allow a fluid introduced through the second port or through the third port and the housing through-hole to pass through the annular distancing space when the elevating rod ascends, thereby performing a check valve function; and a port blocking unit installed in one selected from the second and third ports so as to block the flow of the fluid.

Inventors:
LEE CHONG-CHUN (KR)
LEE SANG BONG (KR)
Application Number:
PCT/KR2017/013966
Publication Date:
June 07, 2018
Filing Date:
November 30, 2017
Export Citation:
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Assignee:
KEEHA PREC CO LTD (KR)
International Classes:
F25B41/06; F16K15/02; F16K27/02
Attorney, Agent or Firm:
KO, Kwang-Hoon (KR)
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