Hot and cold food holding appliance

• US 8,499,683 B2
• Filed: 08/08/2009
• Issued: 08/06/2013
• Est. Priority Date: 08/08/2009
• Status: Active Grant

• Current Assignee: Steven Michael Shei
• Original Assignee: Steven Michael Shei
• Inventors: Shei, Steven Michael
• Primary Examiner(s): Yuen, Henry
• Assistant Examiner(s): SPURLOCK, BRETT SHANE
• Application Number:
  US12/538,133
• Publication Number:
  US 20110030565A1
• Time in Patent Office: 1,459 Days
• Field of Search: 993/24, 993/29.P, 993/30, 993/31, 993/49, 993/74, 994/48, 994/68, 622/56, 622/58, 62/92, 426/438, 426/496, 426/523, 219/202, 219/385, 219/391, 219/395, 219/399, 219/401, 219/413, 219/482, 219/490, 219/491, 126/33, 126/41.C, 165/244, 165/253
• US Class Current: 99/329.P
• CPC Class Codes: A47J 39/006 for either storing and preparing or for preparing food on serving trays, e.g. heating, thawing, preserving
• CPC Class Codes: F25D 31/005 Combined cooling and heating devices

Abstract

A hot and cold food holding appliance including (1) Positioning a heat transfer plate above the top of food holding pans forming the top surface of each food holding compartment. (2) Providing a heat transfer module to transfer energy to/from the food holding pans in each compartment. (3) Thermally isolating each heat transfer module from an adjacent heat transfer module. (4) Removable heat transfer partitions that can used to subdivide each food holding compartment into sections providing additional heat transfer capability along the sides of each food holding pan and blocking the flow of ambient air between the food holding pans. (5) A control system that regulates the temperature of each food holding compartment by sensing the temperature of each heat transfer module and adjusting the amount of heat energy to be transferred.

Claims

1. A food holding appliance for holding food at a desired temperature, comprising:

a food holding compartment for support of food holding pans, said food holding compartment defining a boundary of a heat transfer space;

a heat transfer plate having a heat transfer surface for transfer of heat energy to and from stored food products;

a heat transfer fluid passage thermally coupled to said heat transfer plate for directing a flow of hot or cold heat transfer fluids;

a thermal insulation space between adjacent food holding compartments;

a heat transfer module housing for support of said heat transfer plate, said heat transfer module housing defining a boundary of said thermal insulation space, said heat transfer module housing regulating heat transfer from said food holding compartment to an adjacent food holding compartment, said heat transfer module housing encircling said heat transfer module, said heat transfer module housing being rigidly connected to said heat transfer plate;

a rigid support structure for support and location of a plurality of heat transfer modules, said rigid support structure defining a boundary of said food holding compartment;

wherein said heat transfer surface is integrally conformed to said heat transfer plate;

a heat transfer fluid passage manifold fluidly coupled to said heat transfer fluid passage;

a fluid control valve for heat transfer fluid distribution to said heat transfer modules;

a temperature control for temperature control of said heat transfer surface;

at least one heat conductive removable heat transfer partition assembly including removable heat transfer partitions, said removable heat transfer partition assembly hanging from said heat transfer surface, said removable heat transfer partition assembly being slidably coupled to said heat transfer surface;

means for controlling compression of heat transfer fluids fluidly connected to said means for heat transfer fluid distribution to said heat transfer modules;

means for the control of the heat transfer fluid;

means for temperature control of said heat transfer surface;

means for temperature control of said heat transfer module electrically connected to said means for temperature control of said heat transfer surface, and electrically connected to said means for the control of the heat transfer fluid;

means for generating heat energy from electricity thermally connected to said removable heat transfer partitions; and

means for control of electric heat elements electrically connected to said means for generating heat energy from electricity, and electrically connected to said means for temperature control of said heat transfer surface.

2. The food holding appliance in accordance with claim 1, further comprising:

a thermal insulation space between adjacent ones of said heat transfer modules; and

a means to support said heat transfer partitions includes;

a heat sink mass;

a heat transfer fluid passage;

a thermal insulation space; and

a housing to contain thermal insulation and said heat transfer plate.

3. The food holding appliance in accordance with claim 1, wherein said heat conductive removable heat transfer partition assembly includes guide slots for supporting said heat transfer partitions and said heat transfer plate.

4. The food holding appliance in accordance with claim 3, wherein said removable heat transfer partition assembly is shaped to follow a contour of said food holding pan.

5. The food holding appliance in accordance with claim 4, wherein said removable heat transfer partition assembly has a key-like geometry that corresponds to a geometry of said guide slots.

6. The food holding appliance in accordance with claim 1, wherein said means for controlling compression of the heat transfer fluids includes a refrigeration compressor.

7. The food holding appliance in accordance with claim 1, further comprising a mounting bracket fastening said heat transfer fluid passage or said heat element to said heat transfer plate.

8. The food holding appliance in accordance with claim 1, wherein said means for temperature control of said heat transfer module includes a refrigeration control system.

9. The food holding appliance in accordance with claim 1, wherein said means for the control of the heat transfer fluid includes a fluid control valve.

10. The food holding appliance in accordance with claim 1, wherein said means for temperature control of said heat transfer surface is a temperature control.

11. The food holding appliance in accordance with claim 1, wherein said means for temperature control of said heat transfer module is an oil heat control system.

12. The food holding appliance in accordance with claim 1, wherein said means for control of electric heat elements is an electric heat control system.

13. A food holding appliance for holding food at a desired temperature, comprising:

a heat sink mass;

a heat transfer fluid passage thermally coupled to said heat sink mass;

a thermal insulation space;

a housing containing said thermal insulation space, thermal insulation and a heat transfer plate;

a plurality of heat transfer partitions;

a heat transfer module including said heat transfer plate, said heat transfer module transferring heat to stored food products through a heat transfer surface connected to said heat transfer plate, said thermal insulation space being between said heat transfer module and at least one other adjacent heat transfer module, and a means to support said heat transfer partitions;

a food holding pan for containment and transport of food products;

a rigid support structure for support and location of said heat transfer modules, said rigid support structure defining a boundary of a heat transfer compartment, said rigid support structure being rigidly fastened to said heat transfer module;

a heat transfer fluid passage manifold for heat transfer fluid distribution to said heat transfer modules;

a refrigeration compressor for controlling compression of said heat transfer fluid, said refrigeration compressor being fluidly connected to said heat transfer fluid passage manifold;

a heat conductive removable heat transfer partition for conduction of heat to side walls of said food holding pan and reduction of convective heat transfer from air flow;

a food holding compartment for support of said food holding pan and said food holding compartment defining a boundary of a heat transfer space, partially framed to said support structure, said food holding pan being removably inserted in said food holding compartment;

wherein said heat transfer fluid passage is fluidly connected to said heat transfer fluid passage manifold and thermally coupled to said heat transfer plate;

wherein said heat transfer surface is integrally conformed to said heat transfer plate;

a heat transfer partition guide for locating and support of removable heat transfer partitions, said heat transfer partition guide being removably connected to said removable heat transfer partition and structurally embedded to said heat transfer plate, said removable heat transfer partitions having a key-like geometry matching a geometry of said heat transfer partition guide;

an insulation space for regulating heat transfer from said food holding compartment to an adjacent food holding compartment, said insulation space suitably encircling said heat transfer module;

a heat transfer module housing for support of said heat transfer plate and defining a boundary of said insulation space, said heat transfer module housing being rigidly connected to said heat transfer plate;

a mounting bracket for locating and fastening said fluid transfer passage or a heat element to said heat transfer plate, said mounting bracket being rigidly connected to said heat transfer plate;

a refrigeration control system for control of said heat transfer module temperature, said refrigeration control system being adaptably coupled to said refrigeration compressor and adaptably coupled to said heat transfer fluid passage manifold;

a fluid control valve for the control of said heat transfer fluid, said fluid control valve being electrically connected to said refrigeration control system and fluidly connected to said heat transfer fluid passage manifold;

a temperature control for temperature control of said heat transfer surface, said temperature control being electrically connected to said refrigeration control system;

an oil heat control system for control of said heat transfer module temperature, said oil heat control system being electrically connected to said temperature control and electrically connected to said fluid control valve;

a heat element for generating heat energy from electricity, said heat element being rigidly connected to said mounting bracket and thermally connected to said heat transfer plate; and

an electric heat control system for control of electric heat elements, said electric heat control system being electrically connected to said heat element and electrically connected to said temperature control.

14. The food holding appliance as recited in claim 13, further comprising:

an air flow passage access panel with air flow passages for covering the compressor compartment and directing cooling air flow, said air flow passage access panel being removably engaged to said support structure.

15. A food holding appliance for holding food at a desired temperature, comprising:

a heat sink mass;

a heat transfer fluid passage thermally coupled to said heat sink mass;

a thermal insulation space;

a housing containing said thermal insulation space, thermal insulation and a heat transfer plate;

a plurality of heat transfer partitions;

a heat transfer module including said heat transfer plate, said heat transfer module transferring heat to stored food products through a surface connected to said heat transfer plate, said thermal insulation space being between said heat transfer module and at least one other adjacent heat transfer module, and a means to support said heat transfer partitions;

a food holding pan for containment and transport of food products;

an air flow passage access panel with air flow passages, said access panel covering a compressor compartment and directing cooling air flow;

a rigid support structure for support and location of said heat transfer modules, said rigid support structure defining a boundary of a heat transfer compartment, said rigid support structure being removably engaged to said access panel and rigidly fastened to said heat transfer module;

a heat transfer fluid passage manifold for heat transfer fluid distribution to said heat transfer modules;

a refrigeration compressor for controlling compression of said heat transfer fluid, said refrigeration compressor being fluidly connected to said heat transfer fluid passage manifold;

a heat conductive removable heat transfer partition for conduction of heat to side walls of said food holding pan and reduction of convective heat transfer from air flow;

a food holding compartment for support of said food holding pan and said food holding compartment defining a boundary of a heat transfer space, partially framed to said support structure, said food holding pan being removably inserted in said food holding compartment;

wherein said heat transfer fluid passage is fluidly connected to said heat transfer fluid passage manifold and thermally coupled to said heat transfer plate;

wherein said heat transfer surface is integrally conformed to said heat transfer plate;

a heat transfer partition guide for locating and support of removable heat transfer partitions, said heat transfer partition guide being removably connected to said removable heat transfer partition and structurally embedded to said heat transfer plate, said removable heat transfer partitions having a key-like geometry matching a geometry of said heat transfer partition guide, said removable heat transfer partitions being shaped to follow a contour of said food holding pan;

an insulation space for regulating heat transfer from said food holding compartment to an adjacent food holding compartment, said insulation space suitably encircling said heat transfer module;

a heat transfer module housing for support of said heat transfer plate and defining a boundary of said insulation space, said heat transfer module housing being rigidly connected to said heat transfer plate;

a mounting bracket for locating and fastening said fluid transfer passage or a heat element to said heat transfer plate, said mounting bracket being rigidly connected to said heat transfer plate;

a refrigeration control system for control of said heat transfer module temperature, said refrigeration control system being adaptably coupled to said refrigeration compressor and adaptably coupled to said heat transfer fluid passage manifold;

a fluid control valve for the control of said heat transfer fluid, said fluid control valve being electrically connected to said refrigeration control system and fluidly connected to said heat transfer fluid passage manifold;

a temperature control for temperature control of said heat transfer surface, said temperature control being electrically connected to said refrigeration control system;

an oil heat control system for control of said heat transfer module temperature, said oil heat control system being electrically connected to said temperature control and electrically connected to said fluid control valve;

a heat element for generating heat energy from electricity, said heat element being rigidly connected to said mounting bracket and thermally connected to said heat transfer plate; and

an electric heat control system for control of electric heat elements, said electric heat control system being electrically connected to said heat element and electrically connected to said temperature control.