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Patent Searching and Data


Title:
EXPANSION VALVE
Document Type and Number:
WIPO Patent Application WO/2021/085159
Kind Code:
A1
Abstract:
Provided is an expansion valve that can adjust valve opening with high precision. An expansion valve (1) comprises: a main body (6) that has a valve chamber (15) and a valve seat (12a); a valve body (9) that can advance and retreat with respect to the valve seat; a case (3) that is fixed to the main body (6); an excitation portion (2); a rotor (13) that is rotationally driven by the excitation portion (2); and an advancing and retreating mechanism (C) that converts the rotation motion of the rotor into a linear motion and advances and retreats the valve body (9), in the valve chamber, a bellows (10) that is externally attached to the valve body and expands and contracts as the valve body advances and retreats being arranged, and a space (M2) between the bellows and the valve body being in a vacuum state.

Inventors:
OGAWA NORIYUKI (JP)
Application Number:
PCT/JP2020/038912
Publication Date:
May 06, 2021
Filing Date:
October 15, 2020
Export Citation:
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Assignee:
EAGLE IND CO LTD (JP)
International Classes:
F16K41/10; F25B41/355
Foreign References:
JP2006226369A2006-08-31
JPH08303630A1996-11-22
JP2001108139A2001-04-20
JPH04371767A1992-12-24
Attorney, Agent or Firm:
SHIGENOBU Kazuo et al. (JP)
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