# US 2021/0294362 A1 · Control valve

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- Number: US 2021/0294362 A1
- Document ID: US20210294362A1
- Status: Published application
- Kind: A1
- Application number: 17/190,191
- Filed: 2021-03-02
- Published: 2021-09-23
- Earliest claimed: 2020-03-19
- Assignees: Yamada Manufacturing Co., Ltd.
- Applicants: Yamada Manufacturing Co., Ltd.
- Inventors: Akifumi Ozeki
- Web page: https://patentgrep.com/patent/US20210294362A1

## CPC

- G05D 23/1925: {using a combination of auxiliary electric and non-electric power}
- G05D 23/27541: {using expansible solid}
- F01P 7/165: {characterised by systems with two or more loops}
- F16K 11/0853: {having all the connecting conduits situated in a single plane perpendicular to the axis of the plug}
- F16K 31/002: {actuated by temperature variation (thermo-electric F16K31/025)}
- F28F 27/02: for controlling the distribution of heat-exchange media between different channels ({static flow control means in header boxes F28F9/026}; arrangements of guide plates or guide vanes F28F9/22, F28F25/12)
- G05D 23/27535: {Details of the sensing element}
- F01P 2060/08: Cabin heater
- F01P 2060/16: Outlet manifold
- G05D: SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- F01P: COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES (arrangements in connection with cooling of propulsion units in vehicles B60K11/00; heat-transfer, heat-exchange or heat-storage materials C09K5/00; {cooling of gas-turbine engines F02C7/12}; heat exchange in general, radiators F28)
- F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)}
- F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16)

## Abstract

A control valve includes a casing, a valve body, seal tube members, a fuel passage, and a thermostat. The casing has an inflow port and a plurality of outflow ports. The valve body is rotatably disposed inside the casing, and valve holes are formed in a circumferential wall portion. The seal tube members communicate with the outflow ports, abut an outer circumferential surface of the circumferential wall portion, and are opened and closed by corresponding valve holes. Thermostat opens and closes the fuel passage in response to a detected temperature. A communication groove is formed on an inner circumferential surface of the casing. The communication groove causes the inflow port and an upstream portion of the fuel passage to communicate with each other by partially expanding a gap between the circumferential wall portion and the casing.

## Claims

### Claim 1

A control valve comprising:
a casing which has an inflow port for a liquid flowing in from outside and a plurality of outflow ports for causing a liquid that has flowed into an inside to flow out to outside;
a valve body which is rotatably disposed inside the casing and in which valve holes are formed in a circumferential wall portion;
seal tube members of which one end portion communicates with any of the outflow ports and of which the other end portion abuts an outer circumferential surface of the circumferential wall portion and is opened and closed by the corresponding valve hole;
a fuel passage which causes the inside of the casing and any of the outflow ports to communicate with each other; and
a thermostat which opens and closes the fuel passage in response to a detected temperature,
wherein a communication groove for causing the inflow port and an upstream portion of the thermostat in the fuel passage to communicate with each other is formed on an inner circumferential surface of the casing by partially expanding a gap between the circumferential wall portion and the casing.

### Claim 2 (depends on 1)

The control valve according to claim 1,
wherein any of the valve holes is formed in the circumferential wall portion to face the communication groove when the valve body is at a rotation position where all the seal tube members are closed.

### Claim 3 (depends on 1)

The control valve according to claim 1,
wherein any of the outflow ports for a liquid inside the casing flowing out regardless of a turning position of the valve body is disposed in the vicinity of an upstream side of the thermostat in the fuel passage.

### Claim 4 (depends on 1)

The control valve according to claim 1,
wherein the communication groove is formed on the inner circumferential surface of the casing in an axial direction of the circumferential wall portion toward a side where the inflow port is disposed.