US 12,031,472 B2
Cooling water temperature control device
Takatoshi Furuya, Kiyose (JP)
Assigned to NIPPON THERMOSTAT CO., LTD., Kiyose (JP)
Appl. No. 17/798,482
Filed by NIPPON THERMOSTAT CO., LTD., Kiyose (JP)
PCT Filed Dec. 23, 2020, PCT No. PCT/JP2020/048087
§ 371(c)(1), (2) Date Aug. 9, 2022,
PCT Pub. No. WO2021/161666, PCT Pub. Date Aug. 19, 2021.
Claims priority of application No. 2020-021553 (JP), filed on Feb. 12, 2020.
Prior Publication US 2023/0075049 A1, Mar. 9, 2023
Int. Cl. F01P 7/16 (2006.01); F01P 7/14 (2006.01); F16K 1/44 (2006.01); F16K 31/06 (2006.01); G05D 23/19 (2006.01)
CPC F01P 7/16 (2013.01) [F16K 1/44 (2013.01); F16K 31/06 (2013.01); G05D 23/1925 (2013.01); F01P 2007/146 (2013.01); F01P 2025/08 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A cooling water temperature control device comprising:
a main flow passage through which cooling water flows;
a thermo valve that is disposed in the main flow passage and opens and closes the main flow passage;
a sub-flow passage bypassing the thermo valve;
a sub-valve that opens and closes the sub-flow passage; and
a control unit that opens the sub-valve when a temperature of the cooling water on an upstream side of the thermo valve reaches a predetermined temperature, wherein
the thermo valve includes a temperature sensing unit that senses the temperature of a sensed region in the main flow passage, and opens the main flow passage when the temperature of the cooling water of the sensed region is equal to or higher than an operating temperature set in advance,
one end on the upstream side of the sub-flow passage is connected to the sensed region or a downstream side of the sensed region in the main flow passage, and
the operating temperature is set to be equal to or lower than the predetermined temperature,
wherein the cooling water temperature control device includes a valve case covering the thermo valve along an axis of the thermo valve such that the main flow passage is defined between the thermo valve and the valve case, and is extended along the axis of the thermo valve to a valve seat of the thermo valve,
the valve case covers the temperature sensing unit along the axis of the thermo valve,
the one end on the upstream side of the sub-flow passage is connected to an opening disposed to the valve case such that cooling water flows inside the main flow passage along a surface of the temperature sensing unit and then flows into the one end on the upstream side of the sub-flow passage through the opening when the sub-flow passage is opened.