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US3756037A
Expired / Lapsed
US
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Immersion means for electrically defrosting refrigeration plates
Assignee: FARMERS & MERCHANTS NATIONAL BANK
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Filing: 1972-01-21
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Granted: 1973-09-04
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Expires: 1992-01-21
Abstract
Abstract A refrigeration system made up of a plurality of individual refrigeration plates each including an eutectic solution. Within each plate is a conduit for passing a refrigerant through the plate to freeze the eutectic and a heater for use in raising the temperature of the eutectic to defrost the plate. An electric circuit controls the application of refrigerant and operation of the heaters such that the plates are successively defrosted and during the application of heat to any one plate there is no application of refrigerant to any of the other plates. After the conclusion of the heating cycle on any one plate, all of the plates receive a refrigerant to freeze the eutectic solutions.
Inventors
- 👤 F Raufeisen
- 👤 W Lauterbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:51
CPC Classifications
F; F25; F25D; F25D21/00; F25D21/06; F25D21/08; F25D11/00; F25D11/006
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
106 words
A refrigeration system including a plurality of refrigeration plates, each of saiD plates including an eutectic solution, means for applying cold to each plate to freeze the eutectic, means for applying heat to each plate to raise the temperature of the eutectic and thus to defrost the plate, electric circuit means controllng the application of heat and cold to the plates including means for operating the plate heat applying means successively, means for preventing the application of cold to a plate during the period of heat application, and means for applying cold to all plates after the application of heat to any one of the plates.
Claim 2
Dependent Claim
106 words
A refrigeration system including a plurality of refrigeration plates, each of saiD plates including an eutectic solution, means for applying cold to each plate to freeze the eutectic, means for applying heat to each plate to raise the temperature of the eutectic and thus to defrost the plate, electric circuit means controllng the application of heat and cold to the plates including means for operating the plate heat applying means successively, means for preventing the application of cold to a plate during the period of heat application, and means for applying cold to all plates after the application of heat to any one of the plates.
Claim 3
Dependent Claim
37 words
The structure of claim 1 further characterized in that the means for operating the heat applying means includes means for applying heat to one plate at a time while preventing the application of cold to all plates.
Claim 4
Dependent Claim
24 words
The structure of claim 2 further characterized in that said electric circuit means includes a sequencing relay and a plurality of heat control relays.
Claim 5
Dependent Claim
118 words
A refrigeration system including a plurality of refrigeration plates, each of said plates including an eutectic solution, conduit means positioned within each plate and in heat exchange relationship with the eutectic for passing a refrigerant through the eutectic to freeze it, and a heater positioned inside of each plate and in heat exchange relationship with the eutectic, electric circuit means for controlling the application of refrigerant to each conduit and electric power to each heater including means for operating the heaters in the plates successively, means for preventing the application of refrigerant during periods of heater operation, and means for applying refrigerant to all of the plates after operation of the heater in any one of the plates.
Claim 6
Dependent Claim
118 words
A refrigeration system including a plurality of refrigeration plates, each of said plates including an eutectic solution, conduit means positioned within each plate and in heat exchange relationship with the eutectic for passing a refrigerant through the eutectic to freeze it, and a heater positioned inside of each plate and in heat exchange relationship with the eutectic, electric circuit means for controlling the application of refrigerant to each conduit and electric power to each heater including means for operating the heaters in the plates successively, means for preventing the application of refrigerant during periods of heater operation, and means for applying refrigerant to all of the plates after operation of the heater in any one of the plates.
Claim 7
Dependent Claim
28 words
The structure of claim 4 further characterized in that said electric circuit means includes a sequencing relay for operating said heaters one at a time and in succession.
Claim 8
Dependent Claim
26 words
The structure of claim 5 further characterized by and including relay means for preventing the application of refrigerant to any plate during operation of any heater.
Claim 9
Dependent Claim
32 words
The structure of claim 6 further characterized by and including relay means for controlling the application of refrigerant to all plates after the termination of a heating operation in any one plate.
Claim 10
Dependent Claim
123 words
A refrigeration system including a plurality of refrigeration plates, each of said plates including an eutectic solution, conduit means positioned within each plate and in heat exchange relationship with the eutectic for passing a refrigerant through the eutectic to freeze it, and a heater positioned inside of each plate and in heat exchange relationship with the eutectic, electric circuit means for ocntrolling the application of refrigerant to each conduit and electric power to each heater including means for operating less than all of the plate heaters at any one time, means for preventing the application of refrigerant during periods of heater operation, and means for applying refrigerant to all of the plates after operation of the heater in any one of the plates.
Claim 11
Dependent Claim
123 words
A refrigeration system including a plurality of refrigeration plates, each of said plates including an eutectic solution, conduit means positioned within each plate and in heat exchange relationship with the eutectic for passing a refrigerant through the eutectic to freeze it, and a heater positioned inside of each plate and in heat exchange relationship with the eutectic, electric circuit means for ocntrolling the application of refrigerant to each conduit and electric power to each heater including means for operating less than all of the plate heaters at any one time, means for preventing the application of refrigerant during periods of heater operation, and means for applying refrigerant to all of the plates after operation of the heater in any one of the plates.
Claim 12
Dependent Claim
17 words
The structure of claim 8 further characterized by means for heating only one plate at a time.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |