Heat exchanger

• US 4,997,034 A
• Filed: 12/23/1987
• Issued: 03/05/1991
• Est. Priority Date: 12/23/1987
• Status: Expired due to Fees

• Current Assignee: 3M Company
• Original Assignee: Minnesota Mining and Manufacturing Co (3M Company)
• Inventors: Schroder, Frank S., Grannis, Vaughn B., Steffen, James E.
• Primary Examiner(s): DAVIS JR, ALBERT
• Application Number:
  US07/137,193
• Time in Patent Office: 1,168 Days
• Field of Search: 165/104.33, 165/104.34, 165/185, 165/41, 165/122, 361/383, 361/384, 432/77, 432/81, 432/219, 432/221, 432/223, 432/254.2
• US Class Current: 165/104.34
• CPC Class Codes: B64G 1/50 for temperature control
• CPC Class Codes: F28D 1/024 with an air driving element
• CPC Class Codes: F28F 13/125 by stirring
• CPC Class Codes: F28F 2275/085 with snap connection
• CPC Class Codes: F28F 3/022 the means being wires or pins
• CPC Class Codes: F28F 3/048 in the form of ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels
• CPC Class Codes: F28F 9/001 Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core

Abstract

A heat exchanger including a plate of heat conductive material having a first major face and second major face. An array of a plurality of integral heat transfer elements projecting from the first face and a fan to cause a flow of a heat transfer fluid past the heat transfer elements thereby transferring heat between the heat exchanger and the heat transfer fluid.

Claims

1. A heat exchanger comprising:

a plate made of heat conductive material having a first major face and a second major face;

a plurality of diamond-shaped heat transfer elements projecting from the first face and integral with the plate, the elements being arranged in a wedge-shaped array; and

a panel substantially parallel to and spaced apart from the first face and defining a plenum space that encloses the wedge-shaped array of the heat transfer elements, the plenum space including a half rib located between a pair of arrays.

2. The heat exchanger of claim 1 wherein the plate is circular and has a center, the wedge-shaped array is radially disposed about the center.

3. The heat exchanger of claim 1 wherein the heat transfer elements are longitudinal projections

4. The heat exchanger of claim 1 wherein the heat conductive material includes aluminum.

5. The heat exchanger of claim 1 wherein the heat conductive material includes copper.

6. The heat exchanger of claim 1 further including means to move a fluid in communication with the plenum space.

7. The heat exchanger of claim 1 wherein the wedge-shaped array includes a plurality of rows and column of the heat transfer elements.

8. The heat exchanger of claim 7 wherein the heat transfer elements each have four faces, the plurality of rows have an axis, the plurality of columns have an axis, and the axis of the plurality of rows and the axis of the plurality of columns are each parallel to faces of the heat transfer elements.

9. The heat exchanger of claim 1 wherein the heat exchanger includes four quadrants each with a pair of wedge-shaped arrays forming a circular heat exchanger about a center point.

10. The heat exchanger of claim 9 wherein the plate is circular, the plenum spaces extend outwardly from the center, and further including means to move a fluid located proximate the center of the plate.

11. The heat exchanger of claim 1 wherein the second major face of the heat exchanger is smooth.

12. A heat exchanger for use in a triple containment system wherein heat production occurs in a first container and a first heat transfer fluid is disposed within a second hermetically sealed container with the heat transfer fluid being in fluid communication with an exterior surface of the first container, the second hermetically sealed container being disposed within a third container that is hermetically sealed from an outside environment, the heat exchanger comprising:

conductive plate means having a first plurality of spaced apart pins extending from a first surface and a second plurality of pins extending from an oppositely facing second surface, the first plurality of pins being in heat transfer relationship with the environment and the second plurality of pins being in heat transfer relationship with the heat transfer fluid in the second container and wherein the plate means includes first and second discrete plates having first and second smooth surfaces facing each other in conductive heat transfer relationship;

first means for moving the heat transfer fluid within the second container past the second plurality of pins; and

second means for moving air from the environment past the first plurality of pins.

13. A heat exchanger for use in a triple containment system wherein heat production occurs in a first container and a first heat transfer fluid is disposed within a second hermetically sealed container with the heat transfer fluid being in fluid communication with an exterior surface of the first container, the second hermetically sealed container being disposed within a third container that is hermetically sealed from an outside environment, the heat exchanger comprising:

conductive plate means having a first plurality of spaced apart pins extending from a first surface and a second plurality of pins extending from an oppositely facing second surface, the first plurality of pins being in heat transfer relationship with the environment and the second plurality of pins being in heat transfer relationship with the heat transfer fluid in the second container and wherein the plate means includes first and second discrete plates having first and second smooth surfaces facing in physical contact;

first means for moving the heat transfer fluid within the second container past the second plurality of pins; and

second means for moving air from the environment past the first plurality of pins.

14. The heat exchanger of claim 13 wherein the first means to move fluid is a fan.

15. The heat exchanger of claim 14 wherein the second means to move air is a fan.

16. A heat exchanger for use in a triple containment system wherein heat production occurs in a first container and a first heat transfer fluid is disposed within a second hermetically sealed container with the heat transfer fluid being in fluid communication with an exterior surface of the first container, the second hermetically sealed container being disposed within a third container that is hermetically sealed from an outside environment, the heat exchanger comprising:

conductive plate means having a first plurality of spaced apart pins extending from a first surface and a second plurality of pins extending from an oppositely facing second surface, the first plurality of pins being in heat transfer relationship with the environment and the second plurality of pins being in heat transfer relationship with the heat transfer fluid in the second container and wherein the pins of the first plurality of pins each have a diamond-shaped cross section;

first means for moving the heat transfer fluid within the second container past the second plurality of pins; and

second means for moving air from the environment past the first plurality of pins.

17. The heat exchanger of claim 16 wherein the pins of the second plurality of pins each have a diamond-shaped cross section.

18. A heat exchanger comprising:

a plate made of heat conductive material having a first major face and a second major face;

a first wedge-shaped array of a first plurality of spaced apart heat transfer elements projecting from the first face and integral with the plate wherein the first plurality of spaced-apart heat transfer elements are pins having a diamond-shaped cross section;

a second wedge-shaped array of a plurality of spaced apart heat transfer elements projecting from the second face and integral with the plate;

means to move a first heat transfer past the first array; and

means to move a second heat transfer fluid past the second array.

19. A heat exchanger comprising:

a plate made of heat conductive material having a first major face and a second major face;

a first wedge-shaped array of a first plurality of spaced apart heat transfer elements projecting from the first face and integral with the plate;

a second wedge-shaped array of a plurality of spaced apart heat transfer elements projecting from the second face and integral with the plate;

wherein the second plurality of spaced-apart heat transfer elements have a diamond-shaped cross section;

means to move a first heat transfer past the first array and

means to move a second heat transfer fluid past the second array.

20. A heat exchanger for use in a triple containment system wherein heat production occurs in a first container and a first heat transfer fluid is disposed within a second container with the heat transfer fluid being in fluid communication with an exterior surface of the first container, the second sealed container being disposed within a third container that is sealed from an outside environment, the heat exchanger comprising:

a first discrete conductive plate having a first surface with a first plurality of spaced apart pins extending from the first surface and a smooth second surface, wherein the first plurality of pins are in heat transfer relationship with the environment;

a second discrete conductive plate having a first surface with a second plurality of spaced apart points extending from a first surface and a smooth second surface;

wherein the second plurality of pins are in a heat transfer relationship with the heat transfer fluid of the second container, and the smooth side of the second plate is in conductive heat transfer relationship with the smooth side of the first plate.