Service case

• US 6,883,343 B2
• Filed: 06/18/2003
• Issued: 04/26/2005
• 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: Davidson, Michael B., Lane, Mark
• Primary Examiner(s): Doerrler, William
• Assistant Examiner(s): Ali, Mohammad M.
• Application Number:
  US10/465,367
• Publication Number:
  US 20030205053A1
• Time in Patent Office: 678 Days
• Field of Search: 622/46, 622/55, 622/51, 622/57, 622/34, 622/35
• 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 cooling coil above the shelf configure to cool the air within the compartment;

a refrigeration system configured to circulate a coolant to maintain a selected temperature within the compartment;

a defrost system comprising a heat exchanger configured to use air from the store environment to warm the coolant for circulation to the coil;

wherein coolant can be circulated from the refrigeration system to the coil to maintain a selected temperature in the compartment and coolant can be circulated from the defrost system to the coil to defrost the coil.

2. A temperature controlled case according to 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.

3. A temperature controlled case according to claim 2, wherein the refrigeration system circulates coolant to the shelf.

4. A temperature controlled case according to claim 2, wherein the defrost system circulates coolant to the shelf.

5. A temperature controlled case according to claim 1, further comprising water-tight connectors and flexible tubing for connecting at least one of the shelf and the coil to a coolant supply header and a coolant discharge header.

6. A temperature controlled case according to claim 1, further comprising a temperature control system for restricting or stopping the flow of coolant through at least one of the coil and the shelf.

7. A temperature controlled case according to claim 5, further comprising a separate coolant supply line and coolant discharge line extending between the coolant supply header and the coolant discharge header and the coil and the shelf.

8. A temperature controlled case according to claim 1, further comprising at least one flow regulating device to regulate the flow of coolant through at least one of the coil and the shelf.

9. A temperature controlled case according to claim 8, wherein the heat exchanger includes a coil and a fan.

10. A system for storage and display of chilled or frozen products in a store comprising:

a case defining a compartment for storing the products;

a first cooling system having a first coolant and a second cooling system having a second coolant;

a cooling coil configured to receive the second coolant for cooling air within the compartment;

a shelf beneath the coil and configured to receive the second coolant; and

a control system configured to control the flow of the second coolant to the coil and the shelf;

so that flow of second coolant to the coil and the shelf can be regulated by the control system to control a temperature of the coil separately from a temperature of the shelf and to maintain a selected temperature within the compartment.

11. The system of claim 10 wherein the shelf is provided in separate sections configured to be separately removable from the case.

12. The system of claim 11 further comprising quick disconnect fittings coupled to the separate sections.

13. The system of claim 10 wherein the control system comprises at least one flow regulator configured to control flow of second coolant.

14. The system of claim 13 further comprising a first coolant line configured to circulate second coolant to the coil and a second coolant line configured to circulate second coolant to the shelf.

15. The system of claim 14 wherein the flow regulator is configured to control flow of second coolant through the second coolant line.

16. The system of claim 14 further comprising a first flow regulator to control flow of second coolant to the coil and a second flow regulator to control flow of second coolant to the shelf.

17. The system of claim 16 wherein the first flow regulator and the second flow regulator comprise a solenoid valve.

18. The system of claim 13 wherein the flow regulator is operable to maintain the temperature of the shelf at a level greater than the temperature of the coil.

19. The system of claim 10 further comprising a louver device beneath the coil.

20. The system of claim 10 further comprising a defrost system configured to warm the second coolant with air from the store during defrosting of at least one of the coil and the shelf.

21. The system of claim 20 wherein the control system is operable to defrost the coil at a first frequency and to defrost the shelf at a second frequency, where the first frequency is greater than the second frequency.

22. The system of claim 20 wherein the defrost system comprises a fan and coil for warming the second coolant with air from the store.