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Title:
PRESSURE SWITCH, AND HERMETICALL SEALED ELECTRIC COMPRESSOR
Document Type and Number:
WIPO Patent Application WO/2018/150458
Kind Code:
A1
Abstract:
This pressure switch comprises: an airtight metallic pressure vessel; a contact mechanism provided inside the pressure vessel which is normally in a closed state and which adopts an open state when a pressing force acts thereon; at least one airtight terminal provided through an end surface section of the pressure vessel and connected to the contact mechanism; a metallic first diaphragm attached airtight to a surface section at one end of the pressure vessel which is moved by a first moving pressure and which is returned by a return pressure that is lower than the first moving pressure; a first plunger provided through the surface section at the one end of the pressure vessel, caused by the movement of the first diaphragm to press the contact mechanism which then switches to an open state; a metallic second diaphragm attached airtight to a surface section at the other end of the pressure vessel which is operated by a second moving pressure that is higher than the first moving pressure and which cannot be returned under atmospheric pressure; and a second plunger provided through the surface section at the other end of the pressure vessel, caused by the movement of the second diaphragm to press the contact mechanism which then switches to the open state.

Inventors:
MURATA, Hiroshi (4-30, Hosho-cho, Minami-ku, Nagoya-sh, Aichi 28, 〒4570828, JP)
OKUMURA, Hideki (4-30, Hosho-cho, Minami-ku, Nagoya-sh, Aichi 28, 〒4570828, JP)
OKUMURA, Takehiko (4-30, Hosho-cho, Minami-ku, Nagoya-sh, Aichi 28, 〒4570828, JP)
SUGIURA, Kanichiro (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
TAKAHASHI, Shinichi (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
Application Number:
JP2017/005302
Publication Date:
August 23, 2018
Filing Date:
February 14, 2017
Export Citation:
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Assignee:
UBUKATA INDUSTRIES CO., LTD. (4-30, Hosho-cho Minami-ku, Nagoya-sh, Aichi 28, 〒4570828, JP)
MITSUBISHI ELECTRIC CORPORATION (7-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 10, 〒1008310, JP)
International Classes:
H01H35/34
Domestic Patent References:
WO2009016779A12009-02-05
Foreign References:
JPH0329861Y21991-06-25
JPH11162307A1999-06-18
JPS5313894Y
JPH0945191A1997-02-14
Attorney, Agent or Firm:
SATO INTERNATIONAL PATENT FIRM (Fourteen Hills Center Building, 6-15 Sakae 4-chome, Naka-ku, Nagoya-sh, Aichi 08, 〒4600008, JP)
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