Service case

• US 6,889,514 B2
• Filed: 06/18/2003
• Issued: 05/10/2005
• Est. Priority Date: 08/22/2001
• Status: Expired due to Term

• Current Assignee: Hill Phoenix Incorporated (Dover Corporation)
• Original Assignee: Delaware Capital Formation Incorporated (Dover Corporation)
• Inventors: Hinde, David K., Lane, Mark, Walker, Richard N., Arshansky, Yakov, Davidson, Michael B.
• Primary Examiner(s): Tapolcai, William E.
• Assistant Examiner(s): Ali, Mohammad M.
• Application Number:
  US10/465,766
• Publication Number:
  US 20030213260A1
• Time in Patent Office: 692 Days
• Field of Search: 625/24, 622/46, 622/34, 621/57, 622/51, 624/34, 622/56, 622/55
• US Class Current: 62/246
• CPC Class Codes: A47F 2003/0473 Vending or display tables
• CPC Class Codes: A47F 3/0417 with natural air circulation
• CPC Class Codes: A47F 3/0456 Cases or cabinets of the counter type
• CPC Class Codes: A47F 3/0491 Cooled shelves
• CPC Class Codes: F25D 21/125 the hot fluid being ambient air

Abstract

A temperature controlled service case for storage and display of chilled or frozen products, including at least one compartment for product storage, at least one access opening providing entrance to the compartment, at least one shelf within the compartment for holding product, and refrigeration operatively associated with the compartment for maintaining a selected temperature therein. The refrigeration includes at least one cooling coil above the shelf with a cooling medium flowing therethrough, and cooling within the shelf with a cooling medium flowing therethrough. Coolant supply is also provided for supplying cooling medium to the cooling coil and shelf with separate coolant supply and discharge lines from the coolant supply to the cooling coil and shelf. In accordance with a further embodiment, the shelf is divided into separate sections. In accordance with a still further embodiment, means are provided to warm the coolant for at least one of said cooling coil and shelf.

Claims

1. A temperature controlled case for use in a store environment for storage and display of chilled or frozen products, which comprises:

at least one compartment for storage of products;

at least one access opening providing entrance to the compartment;

at least one shelf within the compartment for products;

at least one coil above the shelf;

a refrigeration system configured to circulate a coolant to at least one of the shelf and the coil to maintain a selected temperature within the compartment;

a defrost system comprising a heat exchanger configured to warm the coolant for circulation to defrost at least one of the coil and the shelf;

a flow regulation device for controlling a flow rate of the fluid to at least one of the coil and the shelf.

2. The temperature controlled case of claim 1 wherein the refrigeration system further comprises a primary and secondary cooling system, wherein the primary cooling system chills coolant in the secondary cooling system to provide cooling for the case.

3. The temperature controlled case of claim 2 wherein the secondary cooling system circulates coolant to the shelf.

4. The temperature controlled case of claim 1 wherein the coolant is circulated through at least one coolant supply line and at least one coolant discharge line and at least one of the coolant supply line and coolant discharge line comprises the flow regulator device configured to control a temperature of at least one of the coil and the shelf.

5. The temperature controlled case of claim 1 wherein the shelf is divided into separate sections.

6. The temperature controlled case of claim 1 wherein the heat exchanger is configured to use air from the store environment to warm the coolant for defrosting.

7. The temperature controlled case of claim 1 wherein the heat exchanger is configured to warm the coolant by interaction with a storage vessel with heating means.

8. The temperature controlled case of claim 1 wherein the heat exchanger comprises a fan and a coil.

9. The temperature controlled case of claim 4 wherein the flow regulator device comprises at least one of a solenoid valve, a flow valve, an orifice, an electronic valve and a change in a diameter of the coolant supply line or the coolant discharge line.

10. The temperature controlled case of claim 1 further comprising a louver beneath the coil and configured to direct air flow within the compartment.

11. A refrigeration device having a primary cooling system with a primary fluid communicating with a first heat exchanger and a secondary cooling system with a secondary fluid communicating with the first heat exchanger to cool the secondary fluid and communicating with at least one of a cooling coil and a pan configured to provide cooling to a compartment to be cooled in a refrigeration mode of operation, the refrigeration device comprising:

at least one coolant supply line and at least one coolant discharge line configured to circulate the secondary fluid through the at least one cooling device; and

a second heat exchanger communicating with the secondary cooling system and communicating with a source of air to warm the secondary fluid in a defrost mode of operation;

wherein the pan is configured to support objects to be cooled within the compartment and the cooling coil disposed above the pan and the objects;

wherein the pan is configured to operate in the refrigeration mode while the cooling coil is configured to operate in the defrost mode.

12. The refrigeration device of claim 11 wherein the second heat exchanger comprises a fan.

13. The refrigeration device of claim 12 wherein a frequency of the defrost mode of operation for the cooling coil is greater than the frequency of the defrost mode of operation for the pan.

14. The refrigeration device of claim 11 wherein the pan is divided into separated sections.

15. The refrigeration device of claim 11 wherein the cooling coil comprises a gravity type coil.

16. The refrigeration device of claim 11 further comprising flexible hoses for routing the secondary fluid to the coil and the pan.

17. The refrigeration device of claim 11 wherein the source of air is an ambient air space in a store.

18. The refrigeration device of claim 11 wherein the pan further comprises an insulation layer on an underside of the pan.

19. A system for refrigeration of products comprising:

a case having a compartment defining a space configured to receive the products;

a first heat exchanger configured to cool a fluid communicating with the space to cool the products;

a second heat exchanger comprising a fan-coil unit configured to interact with an air source to warm the fluid; and

at least one coolant device within the compartment and configured to receive the cooled fluid during a refrigerating mode and to receive the warmed fluid during a defrosting mode.

20. The system of claim 19 wherein the air source is an ambient air source in a store.

21. The system of claim 19 wherein the at least one cooling device comprises a shelf disposed in the compartment and a cooling coil disposed above the products.

22. The system of claim 21 wherein a frequency of the defrosting mode of operation for the cooling coil is greater than a frequency of the defrosting mode of operation for the shelf.

23. The system of claim 21 further comprising at least one flow regulating device configured to control the flow of the fluid to at least one of the cooling coil and the shelf.

24. The system of claim 21 wherein the cooling coil is maintained at a first temperature and the shelf is maintained at a second temperature different from the first temperature.

25. The system of claim 19 further comprising flexible hoses configured to route the fluid to the at least one cooling device.

26. The system of claim 19 further comprising a louver assembly configured to direct a flow of air within the space.

27. The system of claim 21 wherein the shelf comprises multiple sections to facilitate removal of the sections.