Thermostat device

Patent metadata

Field	Value
Publication number	US-12305565-B2
Application number	US-202218275089-A
Country	US
Kind code	B2
Filing date	Feb 16, 2022
Priority date	Feb 17, 2021
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

A thermostat device is provided that smoothens the flow of the coolant to keep the pressure loss small and can sufficiently secure the flow rate of the coolant from the radiator side to the engine side. A housing having a first inlet for introducing a coolant cooled by a radiator and a coolant outlet supplied to the internal combustion engine, a thermo-element accommodated in the housing that moves axially depending on the temperature of the coolant, a control valve that controls the amount of coolant introduced from the first inlet as the thermoelement moves in the axial direction, and a slope having an upward slope from the outlet side to the valve seat side inside the exit-side conduit extending from the valve seat in the housing, wherein the control valve is in contact with in the valve-closed state, toward the flow outlet of the coolant, are provided.

First claim

The invention claimed is:

1. A thermostat device, comprising:
a housing that is disposed in a circulation passage for circulating coolant between an internal combustion engine and a radiator, inside which an accommodation chamber is disposed, and which includes a first conduit and a second conduit for refluxing the coolant to the accommodation chamber;
a thermo-element that is accommodated in the accommodation chamber and configured to move in an axial direction depending on the temperature of the coolant;
a control valve for controlling an amount of coolant reflux in the first conduit by the axial movement of the thermo-element; and
a valve seat inside the housing on which the control valve abuts in a valve-closed state, wherein
the second conduit opposes a side portion of the thermo-element, and on a direction side, to which the control valve approaches the valve seat, which is a one-end side of the direction of the movement of the thermo-element on the inner circumferential wall of the second conduit,
a slope inclining toward the one-end side as approaching the accommodation chamber from one end of the second conduit, and
the accommodation-chamber-side end of the slope is located toward the one-end side than relative to the position of a lower end of the valve seat.

2. The thermostat device according to claim 1 , wherein the first conduit is a first inlet-side conduit, at one end of the first conduit, having a first flow inlet through which the coolant cooled by the radiator is introduced to the accommodation chamber, and the second conduit is an exit-side conduit, at one end of the second conduit, having a flow outlet through which the coolant in the accommodation chamber is supplied to the internal combustion engine, and further, the housing is provided with a second inlet-side conduit at one end having a second flow inlet through which the coolant heated in the combustion engine not passing through the radiator is introduced.

3. The thermostat device according to claim 1 , wherein
the valve seat has a tapered shape with the diameter expanding from the one-end side toward the other-end side of the direction of movement of the thermo-element, and one end on the valve-seat side of the slope is connected to one end on the other-end side of the valve seat ends.

Assignees

• Nippon Thermostat Kk

Inventors

• Nishimura Tetsuya
• Takahata Tatsuya
• Watanabe Shinji
• Watanabe Keita
• Tominaga Takayuki

Classifications

• F01P2007/146

  using valves · CPC title

• G05D23/022

  the sensing element being placed within a regulating fluid flow · CPC title

• F01P7/16 Primary

  by thermostatic control · CPC title