Anti-sweat heater improvement for commercial refrigeration

• US 6,301,913 B1
• Filed: 05/08/2000
• Issued: 10/16/2001
• Est. Priority Date: 05/08/2000
• Status: Expired due to Fees

• Current Assignee: Edward R. Schulak
• Original Assignee: Edward R. Schulak
• Inventors: Ares, Roland, Schulak, Edward R.
• Primary Examiner(s): Tapolcai, William E.
• Application Number:
  US09/567,286
• Time in Patent Office: 526 Days
• Field of Search: 622/48, 622/77
• US Class Current: 62/248
• CPC Class Codes: A47F 3/0434 Glass or transparent panels

Abstract

A refrigerator unit is provided including a casing having a plurality of walls, one of the walls including an opening on one side thereof. A glass door is pivotally attached to the casing for covering the opening. A first warm fluid passage is provided extending along at least a portion of the opening in the casing. A second warm fluid passage extends along a portion of the door along a perimeter thereof where the door engages the casing. The refrigeration system includes a compressor, condenser, expansion valve, and an evaporator connected in series. The refrigerant condensing section has a liquid cooling system wherein the first fluid passage is the refrigerant and the second fluid passage provides the liquid from the liquid cooling system.

Claims

1. A refrigerator unit, comprising:

a casing having a plurality of walls, one of said wall including an opening on one side thereof;

a door pivotally attached to said casing for covering said opening;

a first warm fluid passage in said one of said walls and extending along at least a portion of said opening;

a second warm fluid passage extending along at least a portion of said door along a perimeter thereof where said door engages said casing;

wherein said second warm fluid passage is in continuous heat transfer communication when said door is in an open position and when said door is in a closed position.

2. The refrigerator unit according to claim 1, further comprising a refrigeration system including a compressor, condenser, expansion valve and an evaporator connected in series, said condensing section having a liquid cooling system, wherein said first fluid passage is refrigerant and said second fluid passage provides the liquid from said liquid cooling system.

3. The refrigerator unit according to claim 1, wherein said door is provided with a door gasket which engages said casing, said second warmed fluid passage being disposed adjacent to said door gasket.

4. The refrigerator unit according to claim 1, wherein said second warm fluid passage includes a fluid coupling which extends along a pivot axis of said door.

5. The refrigerator unit according to claim 1, wherein said casing includes a plurality of openings, each of said openings having a door pivotally mounted adjacent thereto, wherein each of said doors has a warm fluid passage extending along at least a portion of said door along a perimeter thereof where said door engages said casing.

6. A refrigerator unit, comprising:

a casing having a plurality of walls, one of said wall including an opening on one side thereof;

a door pivotally attached to said casing for covering said opening;

a warm fluid passage extending along at least a portion of said door along a perimeter thereof where said door engages said casing;

wherein said warm fluid passage is in continuous heat transfer communication when said door is in an open position and when said door is in a closed position.

7. The refrigerator unit according to claim 6, further comprising a refrigeration system including a compressor, condenser, expansion valve and an evaporator connected in series, said condensing section having a liquid cooling system, wherein said warm fluid passage is provided with liquid from said liquid cooling system.

8. The refrigerator unit according to claim 6, wherein said door is provided with a door gasket which engages said casing, said warm fluid passage being disposed adjacent to said door gasket.

9. The refrigerator unit according to claim 6, wherein said warm fluid passage includes a fluid coupling which extends along a pivot axis of said door.

10. The refrigerator unit according to claim 6, wherein said casing includes a plurality of openings, each of said openings having a door pivotally mounted adjacent thereto, wherein each of said doors has a warm fluid passage extending along at least a portion of said door along a perimeter thereof where said door engages said casing.