THERMOSTAT DEVICE

• US 20100326375A1
• Filed: 02/18/2009
• Published: 12/30/2010
• Est. Priority Date: 02/20/2008
• Status: Abandoned Application

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Furukoshi, Taro, Shikida, Takasuke
• Application Number:
  US12/866,486
• Publication Number:
  US 20100326375A1
• Time in Patent Office: Days
• US Class Current: 123/41.09
• CPC Class Codes: F01P 2060/08 Cabin heater
• CPC Class Codes: F01P 2070/00 Details
• CPC Class Codes: F01P 7/16 by thermostatic control

Abstract

In a thermostat device, a high-temperature cooling water inlet that introduces high-temperature cooling water from a bypass path that has been heated by an engine and has bypassed a radiator is provided at a side position of the valve housing that is substantially orthogonal to a direction in which the temperature sensitive movable portion moves, and a heater path inlet that introduces cooling water from a heater path that has been supplied to a heater core is provided at a lower end portion of the valve housing. The high-temperature cooling water inlet is provided with a plurality of guide portions protruding from the right and left sides of the inlet along the lower face of a cut-off portion toward the temperature sensitive movable portion, and the high-temperature cooling water introduced from the high-temperature cooling water inlet by the guide portions is guided toward the temperature sensitive movable portion.

Claims

1. A thermostat device that is incorporated in a valve housing through which cooling water from an internal combustion engine flows, that has a temperature sensitive movable portion that moves due to a change in cooling water temperature, and that is configured to control a temperature of cooling water introduced into the internal combustion engine by operating a valve body to open and close with respect to a valve seat formed in the valve housing together with movement of the temperature sensitive movable portion,

wherein an inlet that introduces cooling water from a bypass path that has been heated by the internal combustion engine and has bypassed a cooling portion is provided at a side position of the valve housing that is substantially orthogonal to a direction in which the temperature sensitive movable portion moves, and a heater path inlet portion that introduces cooling water from a heater path that has been supplied to a heater core is provided on a side of the valve housing that is located further to an opening direction side of the valve body than the temperature sensitive movable portion, and

the inlet includes a guide portion that guides cooling water introduced from the inlet toward the temperature sensitive movable portion.

3. The thermostat device according to claim 1,

wherein the valve housing is molded by casting and using a plurality of movable cores that form a cavity in a die, and

the guide portion is formed from a periphery of the inlet along a die parting line of the valve housing in which back ends in a direction in which the movable cores are withdrawn are located.

4. The thermostat device according to claim 3,

wherein the movable core that is last withdrawn from the die is withdrawn in a backward direction after being moved toward an empty space created by a movable core that is withdrawn before in the backward direction from the die, and

the guide portion protrudes from the periphery of the inlet in a direction in which the movable core that is last withdrawn from the die is moved toward the empty space.

5. The thermostat device according to claim 1,

wherein a proximity guide portion that guides cooling water guided by the guide portion closer to the temperature sensitive movable portion is provided between the temperature sensitive movable portion and the guide portion.

6. The thermostat device according to claim 1,

wherein the guide portion includes lateral guide pieces that guide the cooling water introduced from the inlet toward the temperature sensitive movable portion, while laying off the cooling water from two side edges that are substantially orthogonal to a direction of the opening and closing operation, in the peripheral edges of the inlet.

7. The thermostat device according to claim 1,

wherein the guide portion includes a valve opening-side guide piece that guides the cooling water introduced from the inlet toward the temperature sensitive movable portion, while laying off the cooling water from a side edge to a valve opening direction of the valve body in the peripheral edges of the inlet.

8. The thermostat device according to claim 7,

wherein a support member for supporting a biasing portion that biases the valve body in a closing direction is disposed in the valve opening direction edge of the inlet, and the valve opening direction edge of the inlet and the support member extend continuously such that they are substantially flush with each other, and

the valve opening-side guide piece is provided in the support member.

9. The thermostat device according to claim 7,

wherein the valve opening-side guide piece is disposed between the lateral guide pieces.

10. The thermostat device according to claim 1,

wherein the guide portion is formed to have a plate shape that protrudes parallel to a direction from peripheral edges of the inlet to the temperature sensitive movable portion.

2. A thermostat device that is incorporated in a valve housing through which cooling water from an internal combustion engine flows, that has a temperature sensitive movable portion that moves due to a change in cooling water temperature, and that is configured to control a temperature of cooling water introduced into the internal combustion engine by operating a valve body to open and close with respect to a valve seat formed in the valve housing together with movement of the temperature sensitive movable portion,

wherein an inlet that introduces cooling water from a bypass path in which cooling water that has been heated by the internal combustion engine and has bypassed a cooling portion and cooling water that has been supplied to a heater core are mixed is provided at a side position of the valve housing that is substantially orthogonal to a direction in which the temperature sensitive movable portion moves, and

the inlet includes a guide portion that guides cooling water introduced from the inlet toward the temperature sensitive movable portion.

11. The thermostat device according to claim 2,

wherein a merging portion at which the bypass path merges with the heater path is provided in the bypass path, and the merging portion is provided upstream of the inlet.

12. The thermostat device according to claim 2,

wherein the valve housing is molded by casting and using a plurality of movable cores that form a cavity in a die, and

the guide portion is formed from a periphery of the inlet along a die parting line of the valve housing in which back ends in a direction in which the movable cores are withdrawn are located.

13. The thermostat device according to claim 12,

wherein the movable core that is last withdrawn from the die is withdrawn in a backward direction after being moved toward an empty space created by a movable core that is withdrawn before in the backward direction from the die, and

the guide portion protrudes from the periphery of the inlet in a direction in which the movable core that is last withdrawn from the die is moved toward the empty space.

14. The thermostat device according to claim 2,

wherein a proximity guide portion that guides cooling water guided by the guide portion closer to the temperature sensitive movable portion is provided between the temperature sensitive movable portion and the guide portion.

15. The thermostat device according to claim 2,

wherein the guide portion includes lateral guide pieces that guide the cooling water introduced from the inlet toward the temperature sensitive movable portion, while laying off the cooling water from two side edges that are substantially orthogonal to a direction of the opening and closing operation, in the peripheral edges of the inlet.

16. The thermostat device according to claim 2,

wherein the guide portion includes a valve opening-side guide piece that guides the cooling water introduced from the inlet toward the temperature sensitive movable portion, while laying off the cooling water from a side edge to a valve opening direction of the valve body in the peripheral edges of the inlet.

17. The thermostat device according to claim 16,

wherein a support member for supporting a biasing portion that biases the valve body in a closing direction is disposed in the valve opening direction edge of the inlet, and the valve opening direction edge of the inlet and the support member extend continuously such that they are substantially flush with each other, and

the valve opening-side guide piece is provided in the support member.

18. The thermostat device according to claim 16,

wherein the valve opening-side guide piece is disposed between the lateral guide pieces.

19. The thermostat device according to claim 2,

wherein the guide portion is formed to have a plate shape that protrudes parallel to a direction from peripheral edges of the inlet to the temperature sensitive movable portion.