SPECIALTY COOLING FEATURES USING EXTRUDED EVAPORATOR

• US 20150211780A1
• Filed: 04/09/2015
• Published: 07/30/2015
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Whirlpool Corporation
• Original Assignee: Whirlpool Corporation
• Inventors: Litch, Andrew D.
• Granted Patent: US 9,885,513 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F25B 1/00 Compression machines, plants or systems with non-reversible cycle F25B3/00, F25B5/00, F25B6/00, F25B7/00, F25B9/00 take precedence
• CPC Class Codes: F25B 2400/24 Storage receiver heat
• CPC Class Codes: F25B 25/005 using primary and secondary systems
• CPC Class Codes: F25B 39/02 Evaporators
• CPC Class Codes: F25D 11/006 with cold storage accumulators
• CPC Class Codes: F25D 11/02 with cooling compartments at different temperatures
• CPC Class Codes: F25D 21/12 by hot-fluid circulating system separate from the refrigerant system
• CPC Class Codes: F28D 1/0477 the conduits being bent in a serpentine or zig-zag
• CPC Class Codes: F28D 1/0478 the conduits having a non-circular cross-section
• CPC Class Codes: F28D 2020/0013 the heat storage material being enclosed in elements attached to or integral with heat exchange conduits
• CPC Class Codes: F28D 7/0016 the conduits for one medium or the conduits for both media being bent F28D7/0033 takes precedence
• CPC Class Codes: F28D 7/0041 the conduits for only one medium being tubes having parts touching each other or tubes assembled in panel form F28D7/0008, F28D7/0058 take precedence
• CPC Class Codes: F28F 1/022 with multiple channels
• CPC Class Codes: F28F 1/16 the means being integral with the element, e.g. formed by extrusion F28F1/22 takes precedence
• CPC Class Codes: F28F 1/26 the means being integral with the element F28F1/32 takes precedence
• CPC Class Codes: F28F 17/00 Removing ice or water from heat-exchange apparatus

Abstract

An appliance includes a co-extruded evaporator in thermal communication with a compartment. The co-extruded evaporator includes main and support channels in thermal communication that share a common wall. A main cooling loop is in fluid communication with the main channel. A plurality of co-extruded fins are disposed proximate and in thermal communication with the main and support channels. A coolant is disposed in the main channel and the main cooling loop. A thermally conductive media is selectively disposed in the support channel in fluid and thermal communication with the main channel. The thermally conductive media is chosen from the group consisting of a support channel coolant, wherein the appliance includes a second cooling loop in fluid communication with the support channel, a thermal storage material in thermal communication with the compartment, and a defrost fluid, wherein the appliance includes a defrost circuit in fluid communication with the support channel.

Claims

1. An evaporator assembly for a refrigerating appliance, the evaporator assembly comprising:

a co-extruded evaporator having a main channel and at least one support channel in direct thermal communication with the main channel, wherein a wall of the main channel comprises at least a portion of a wall of the at least one support channel, and a plurality of co-extruded cooling fins disposed proximate at least one of the main channel and the at least one support channel, wherein the plurality of cooling fins is in direct physical contact with and in thermal communication with at least one of the main channel and the at least one support channel;

a coolant fluid disposed in the main channel;

a thermally conductive media in communication with the at least one support channel, the thermally conductive media being independent and maintained separate from the coolant fluid disposed in the main channel and selectively disposed in each at least one support channel, wherein the thermally conductive media is in direct contact and in thermal communication with the main channel and in thermal communication with the coolant fluid in the main channel.

2. The evaporator assembly of claim 1, wherein the thermally conductive media for each at least one support channel is a support channel coolant.

3. The evaporator assembly of claim 1, wherein the thermally conductive media for each at least one support channel is a thermal storage material, wherein the thermal storage material is disposed within a volume defined by an interior surface and first and second ends of the selected at least one support channel.

4. The evaporator assembly of claim 1, wherein the thermally conductive media for each at least one support channel is a defrost fluid.

5. The evaporator assembly of claim 1, wherein the plurality of co-extruded cooling fins comprises a first plurality of cooling fins disposed in direct contact and in thermal communication with the main channel and a second plurality of cooling fins disposed in direct contact and in thermal communication with the at least one support channel.

6. The evaporator assembly of claim 3, wherein the thermally conductive media within at least one of the at least one support channel is a thermal storage material.

7. The evaporator assembly of claim 1, wherein the at least one support channel includes first and second support channels, and wherein the first support channel includes a defrost fluid and the second support channel contains one of a support channel coolant and a thermal storage material.

8. The evaporator assembly of claim 1, wherein the at least one support channel includes first, second and third support channels, wherein the first support channel includes a defrost fluid, the second support channel includes a support channel coolant and the third support channel includes a thermal storage material.

17. A method for advanced cooling of a refrigerator, utilizing the apparatus of claim 1, the method comprising steps of:

disposing the co-extruded evaporator within an appliance having a main loop and at least one compartment, wherein the co-extruded evaporator is proximate to and in thermal communication with the at least one compartment and the main cooling loop is in communication with the main channel of the co-extruded evaporator, and wherein the main channel is in thermal communication with a coolant fluid disposed in the main cooling loop; and

selectively disposing a thermally conductive media within the at least one support channel, wherein the thermally conductive media is in direct contact and in thermal communication with the main channel and in thermal communication with the coolant fluid in the main channel.

19. The method of claim 17, further comprising the steps of:

providing a third cooling loop in fluid communication with the support channel of the co-extruded evaporator; and

providing a cooling valve disposed proximate the support channel and in fluid communication with the at least one support channel and the second and third cooling loops, wherein the cooling valve selectively controls flow of coolant from the at least one support channel into the second and third cooling loops.

9. An evaporator assembly comprising:

a co-extruded evaporator disposed in thermal communication with and in thermal communication of an interior compartment of an appliance such that the co-extruded evaporator provides cooling to a portion of the interior compartment, the co-extruded evaporator having a main channel in thermal communication with a main cooling loop and at least one support channel in direct thermal communication with the main channel, wherein a wall of the main channel comprises at least a portion of a wall of each at least one support channel, and a plurality of first co-extruded cooling fins disposed in direct physical contact and in thermal communication with the main channel and a plurality of second co-extruded cooling fins disposed in direct physical contact and in thermal communication with the at least one support channel;

a coolant fluid disposed in the main channel, the coolant fluid in thermal communication with the main cooling loop; and

a thermally conductive media selectively disposed within the at least one support channel that is independent and maintained separately from the coolant fluid disposed in the main channel, wherein the thermally conductive media and the coolant fluid are each in direct physical contact with the wall of the main channel.

10. The evaporator assembly of claim 9, wherein the thermally conductive media for each at least one support channel is chosen from a group consisting of:

a. a support channel coolant, wherein the appliance further comprises a second cooling loop in fluid communication with the at least one support channel, and wherein the second cooling loop is in thermal communication with at least one cooling module that provides cooling to an interior of the at least one cooling module;

b. a thermal storage material, wherein the thermal storage material is disposed within a volume defined by an interior surface and first and second ends of the selected at least one support channel, and wherein a thermal storage media is in thermal communication with the same at least one interior compartment; and

c. a defrost fluid, wherein the appliance further comprises a defrost circuit in fluid communication with the at least one support channel, and wherein the defrost circuit is in fluid communication with a defrost-fluid pump and in thermal communication with a heat source.

11. The evaporator assembly of claim 10, wherein the thermally conductive media is the support channel coolant, the appliance further comprising:

a liquid-to-liquid heat exchanger, wherein the liquid-to-liquid heat exchanger comprises the main channel and the pluralities of first and second co-extruded cooling fins of the co-extruded evaporator.

12. The evaporator assembly of claim 10, wherein the thermally conductive media is the thermal storage material.

13. The evaporator assembly of claim 11, wherein the appliance comprises a third cooling loop in fluid communication with the at least one support channel, wherein a cooling valve selectively controls flow of the support channel coolant from the at least one support channel to the second and third cooling loops.

14. The evaporator assembly of claim 13, wherein the defrost-fluid pump of the defrost circuit further comprises a passive thermosyphon pump.

15. The evaporator assembly of claim 13, wherein the heat source is located external to the appliance.

16. The evaporator assembly of claim 10, wherein the thermally conductive media is the defrost fluid, the appliance further comprising:

a defrost valve in fluid communication with the defrost circuit and the at least one support channel and disposed proximate a first end of the at least one support channel, wherein the defrost valve is configured to selectively control the flow of the defrost fluid through the at least one support channel;

a defrost cycle in fluid communication with the defrost circuit and configured to selectively control the defrost valve and the defrost-fluid pump to selectively control flow of defrost fluid through the at least one selected support channel, wherein the defrost fluid provides heat to the main channel to melt frozen water present on the main channel.

18. The method of claim 16, wherein the thermally conductive media for each at least one support channel is chosen from a group consisting of:

a. a support channel coolant, wherein the appliance further comprises a second cooling loop in fluid communication with the at least one support channel, and wherein the second cooling loop is in thermal communication with at least one cooling module that provides cooling to an interior of the at least one cooling module;

b. a thermal storage material, wherein the thermal storage material is disposed within a volume defined by an interior surface and first and second ends of the support channel, and wherein the thermal storage material is in thermal communication with the same at least one compartment; and

c. a defrost fluid, wherein the appliance further comprises a defrost circuit in fluid communication with the at least one support channel, and wherein the defrost circuit is in fluid communication with a defrost-fluid pump and in thermal communication with a heat source.

20. The method of claim 16, wherein the thermally conductive media is the thermal storage material, wherein the thermal storage material receives and stores cooling from the coolant fluid and transfers the stored cooling to the same at least one compartment.