THERMOSTAT DEVICE

WIPO Patent Application WO/2022/176872

A1

Provided is a thermostat device with which temperature sensitivity and responsiveness can be improved, and which resolves the problem of instability of operation of a control valve, and the problem of hunting.　The thermostat device is provided with: a housing (3) including a first inflow port (5a) for accepting cooling liquid from a radiator, a second inflow port (4b) for accepting cooling liquid that has passed through a bypass passage, and an outflow port (4c) for cooling liquid obtained by mixing the cooling liquids; a thermoelement (2a) which is accommodated in the housing (3), and which moves in an axial direction in accordance with the temperature of the cooling liquid from the second inflow port (4b); a control valve (2c) which controls an introduction quantity of the cooling liquid from the first inflow port in conjunction with the movement of the thermoelement (2a); a valve seat (5c) which is formed in a tip end portion of an annular projecting portion (5d) formed projecting in a movement axis direction of the thermoelement (2a) in the housing (3), and against which the control valve (2c) abuts when the valve is closed; and an annular groove (3d) configured by means of an annular gap which is continuous in a circumferential direction, and which is applied to the outside of the valve seat (5c).

NISHIMURA TETSUYA (JP)
TAKAHATA TATSUYA (JP)
WATANABE SHINJI (JP)
WATANABE KEITA (JP)
TOMINAGA TAKAYUKI (JP)

PCT/JP2022/006042

August 25, 2022

February 16, 2022

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NIPPON THERMOSTAT KK (JP)

F01P7/16; F16K31/68

WO2019066759A1	2019-04-04
WO2013114676A1	2013-08-08

JP2005090726A	2005-04-07
JP2015129560A	2015-07-16
JP2019183747A	2019-10-24
JPS5852372U	1983-04-09

KINOSHITA Shigeru (JP)

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