Liquid cooling system with thermal valve deflector

Patent metadata

Field	Value
Publication number	US-9856749-B2
Application number	US-201615361046-A
Country	US
Kind code	B2
Filing date	Nov 24, 2016
Priority date	Feb 21, 2013
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

The liquid cooling system has a heat exchanger having a fluid inlet and an outlet; a fluid supply conduit leading to the inlet of the heat exchanger; a fluid return conduit extending from the outlet of the heat exchanger; a bypass conduit extending between the fluid supply conduit and the fluid return conduit; a thermal valve configured for selectively closing the bypass conduit, the valve having a temperature sensing element positioned downstream of both the heat exchanger and the bypass conduit, the temperature sensing element configured to selectively move the thermal valve in response to a temperature change of the liquid which the temperature sensing element is exposed to relative to a temperature threshold of the valve; and a deflector positioned between the temperature sensing element and at least one of the bypass conduit and the heat exchanger outlet.

First claim

What is claimed is:

1. A liquid cooling system for directing a fluid therethrough, the system comprising:
a heat exchanger having a fluid inlet and outlet;
a fluid supply conduit leading to the inlet of the heat exchanger;
a fluid return conduit extending from the outlet of the heat exchanger;
a bypass conduit extending between the fluid supply conduit and the fluid return conduit in parallel with the heat exchanger;
a thermal valve configured for selectively closing the bypass conduit, the valve having a temperature sensing element positioned downstream of both the heat exchanger and the bypass conduit, the temperature sensing element configured to selectively move the thermal valve in response to a temperature change of the liquid to which the temperature sensing element is exposed, relative to a temperature threshold of the temperature sensing element; and
a deflector positioned between the temperature sensing element and the bypass conduit, the deflector being stationary and fixed in position relative to one of the fluid return conduit and the bypass conduit, the deflector being shaped and configured to guide liquid flow exiting the bypass conduit to mix with liquid flow exiting the heat exchanger outlet upstream from the thermal sensing element.

2. The liquid cooling system of claim 1 wherein the deflector is made integral to the fluid return conduit.

3. The liquid cooling system of claim 1 wherein the deflector is integral to the valve.

4. The liquid cooling system of claim 1 wherein the valve has a body housed inside the fluid return conduit, a spindle received in the fluid return conduit, the spindle bearing a head movable against an outlet of the bypass conduit upon said activation to close off the bypass conduit and force liquid flow through the heat exchanger.

5. The liquid cooling system of claim 4 wherein the deflector extends around, and slidingly receives, the spindle.

6. The liquid cooling system of claim 4 wherein the valve is biased for the head to move away from the bypass conduit in the absence of said activation.

7. The liquid cooling system of claim 4 wherein the temperature sensing element is cylindrical and provided as part of the valve body.

8. The liquid cooling system of claim 7 wherein the deflector extends around the spindle and closes off access to the temperature sensing element except from a path leading toward the heat exchanger outlet.

9. The liquid cooling system of claim 1 wherein the fluid return conduit, the valve, and the deflector are configured to favour mixing a major proportion of liquid exiting the bypass conduit with liquid exiting the heat exchanger outlet prior to exposure of the temperature sensing element thereto.

10. A thermal valve for use in a liquid cooling system including a heat exchanger, a fluid supply conduit feeding an inlet of the heat exchanger and a fluid return conduit receiving flow from an outlet of the heat exchanger, and a bypass conduit extending between the fluid supply conduit and the fluid return conduit, in parallel with the heat exchanger, the thermal valve comprising:
a body adapted to be secured to the fluid return conduit, and a valve head mounted to a spindle displaceable relative to the body within the bypass conduit between an open and a closed position relative to an outlet of the bypass conduit, the valve head in said closed position adapted to close off the bypass conduit and force liquid flow through the heat exchanger, wherein the thermal valve is configured for selectively opening and closing the bypass conduit;
a temperature sensing element supported by the body and positioned downstream of both the heat exchanger and the bypass conduit, the temperature sensing element configured to selectively move the valve head of the thermal valve in response to a temperature change of the liquid to which the temperature sensing element is exposed, relative to a temperature threshold of the temperature sensing element; and
a deflector positioned between the temperature sensing element and the bypass conduit, the deflector being stationary and fixed in position relative to one of the fluid return conduit and the bypass conduit, the deflector being shaped and configured to guide liquid flow exiting the bypass conduit to mix with liquid flow exiting the heat exchanger outlet upstream from the thermal sensing element.

11. The thermal valve of claim 10 , wherein the deflector is integral to the thermal valve.

12. The thermal valve of claim 10 , wherein the deflector extends around, and slidingly receives, the spindle of the thermal valve.

13. The thermal valve of claim 10 , wherein the valve is biased for the head to move away from the bypass conduit in the absence of activation of the thermal valve.

14. The thermal valve of claim 10 , wherein the temperature sensing element is cylindrical and provided as part of the valve body.

15. The thermal valve of claim 14 , wherein the deflector extends around the spindle and closes off access to the temperature sensing element except from a path leading toward the heat exchanger outlet.

Assignees

• Pratt & Whitney Canada

Inventors

• Adique Marc Jordan
• Ng Kevin
• Alecu Daniel T

Classifications

• F28F2250/06

  Derivation channels, e.g. bypass · CPC title

• F28F27/02 Primary

  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) · CPC title

• F01D25/125 Primary

  of bearings · CPC title

• F02C7/185

  Cooling means for reducing the temperature of the cooling air or gas · CPC title

• F02C7/14

  of fluids in the plant {, e.g. lubricant or fuel (F02C7/185 takes precedence)} · CPC title