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Title:
EXPANSION VALVE
Document Type and Number:
WIPO Patent Application WO/2019/181377
Kind Code:
A1
Abstract:
This improved expansion valve which is of low cost and in which noise can be further reduced has: a valve body 2 which is disposed in a valve chamber VS connecting two flow paths 21, 22 and which is provided with an annular valve seat 20 past which fluid flowing between the flow paths 21, 22 passes; a valve body 3 which sits on the valve seat 20 to block the passage of the fluid and which separates from the valve seat 20 to allow the passage of the fluid; a coiled spring 41 which is disposed in the valve chamber VS while the side surface of the coiled spring 41 faces the flow of fluid flowing from the flow paths 21, 22, and which urges the valve body 3 toward the valve seat 20; an operating rod 5 which, against the urging force of the coiled spring 41, presses the valve body 3 in the direction in which the valve body 3 separates from the valve seat 20; a valve body support 42 disposed between the valve body 3 and one end of the coiled spring 41; and a spring receiving member 43 mounted to the valve body 2 and provided with a bottom section 43a which holds the other end of the coiled spring 41, and with an outer pipe-like section 43b which extends in an axial direction along the outer periphery of the coiled spring 41 from the bottom section 43a. The valve body support 42 is provided with a holding section 42a which holds the valve body 3, and with an inner cylinder body 42b which extends in the axial direction along the inner periphery of the coiled spring 41. An end of the inner cylinder body 42b is located inside the outer pipe-like member 43b.

Inventors:
MOGI, Takashi (17-24 Todoroki 7-chome, Setagaya-k, Tokyo 82, 〒1580082, JP)
KUBOTA, Kouhei (17-24 Todoroki 7-chome, Setagaya-k, Tokyo 82, 〒1580082, JP)
HAYAKAWA, Junya (17-24 Todoroki 7-chome, Setagaya-k, Tokyo 82, 〒1580082, JP)
MATSUDA, Ryo (17-24 Todoroki 7-chome, Setagaya-k, Tokyo 82, 〒1580082, JP)
Application Number:
JP2019/007044
Publication Date:
September 26, 2019
Filing Date:
February 25, 2019
Export Citation:
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Assignee:
FUJIKOKI CORPORATION (17-24, Todoroki 7-chome Setagaya-k, Tokyo 82, 〒1580082, JP)
International Classes:
F25B41/06; F16K15/18; F16K31/68; F16K47/02
Domestic Patent References:
WO2017022378A12017-02-09
Foreign References:
JP2010145027A2010-07-01
JP2017198386A2017-11-02
JP2014238206A2014-12-18
JP2010014369A2010-01-21
Attorney, Agent or Firm:
PATENT CORPORATE BODY DAI-ICHI KOKUSAI TOKKYO JIMUSHO (5-12, Iwamotocho 3-chome Chiyoda-k, Tokyo 32, 〒1010032, JP)
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