Patent JPS5528640A successfully refreshed from Google Patents.
US3786648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling system with multiple evaporators
Assignee: Hobart Corp
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Filing: 1973-03-05
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Granted: 1974-01-22
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Expires: 1993-03-05
Abstract
Abstract A cooling system for a refrigerator and a water cooler. A cabinet is provided with a refrigeration chamber having a first evaporator contained therein and a water cooler chamber having a second evaporator contained therein. The evaporators are connected to a single condenser and to first and second valves. The condenser and evaporators are further connected to a compressor. A control circuit is further provided for controlling the valves. The valves remain open while the compressor is off allowing the fluid pressure to equalize on either side of the compressor.
Inventors
- 👤 M Rice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:17
CPC Classifications
F; F25; F25D; F25D23/00; F25D23/12; F25D23/126; F25B; F25B5/00; F25B5/02; F25B2600/00; F25B2600/25; F25B2600/2511; F25D2400/00; F25D2400/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
293 words
A refrigeration system and a control circuit comprising: input means for connecting the circuit to a source of operating potential; first and second thermostats; a first switch responsive to said first thermostat connected to said input means; a second switch responsive to said second thermostat connected to said input meaNs; a compressor connected to said first and second switches, said compressor being energized upon the closing of any of said first and second switches; a third switch connected to a first relay coil; a fourth switch connected to a second relay coil; said third and fourth switches being electrically connected to said first and second switches, said third switch being mechanically ganged to said first switch so that when said first switch is open said third switch is closed and visa versa, said fourth switch being mechanically ganged to said second switch so that when said second switch is open said fourth switch is closed and visa versa; a first relay switch connected to a first valve coil and to said input means, said first relay switch being coupled to said first relay coil, said first relay switch being opened upon energization of said first relay coil; a second relay switch connected to a second valve coil and to said input means, said second relay switch being coupled to said second relay coil, said second relay switch being opened upon energization of said second relay coil; first and second electromechanical valves connected to a mechanical condensor, said first and second valves being opened during energization of said first and second valve coils respectively; said condensor being connected to said compressor; a first and second evaporator respectively connected to said first and second valves; said first and second evaporator being connected to said compressor.
Claim 2
Dependent Claim
293 words
A refrigeration system and a control circuit comprising: input means for connecting the circuit to a source of operating potential; first and second thermostats; a first switch responsive to said first thermostat connected to said input means; a second switch responsive to said second thermostat connected to said input meaNs; a compressor connected to said first and second switches, said compressor being energized upon the closing of any of said first and second switches; a third switch connected to a first relay coil; a fourth switch connected to a second relay coil; said third and fourth switches being electrically connected to said first and second switches, said third switch being mechanically ganged to said first switch so that when said first switch is open said third switch is closed and visa versa, said fourth switch being mechanically ganged to said second switch so that when said second switch is open said fourth switch is closed and visa versa; a first relay switch connected to a first valve coil and to said input means, said first relay switch being coupled to said first relay coil, said first relay switch being opened upon energization of said first relay coil; a second relay switch connected to a second valve coil and to said input means, said second relay switch being coupled to said second relay coil, said second relay switch being opened upon energization of said second relay coil; first and second electromechanical valves connected to a mechanical condensor, said first and second valves being opened during energization of said first and second valve coils respectively; said condensor being connected to said compressor; a first and second evaporator respectively connected to said first and second valves; said first and second evaporator being connected to said compressor.
Claim 3
Dependent Claim
193 words
A refrigerator-water cooler comprising: an enclosure divided into a refrigerator compartment and a water cooler compartment; a cooling system adapted to receive a coolant including: a first evaporator included in said refrigerator compartment, a second evaporator included in said water cooler compartment, a compressor connected to one side of said first and second evaporators, first and second valves connected respectively to the other sides of said first and second evaporators, said first and second valves being open at least while said compressor is off, a condenser connected between said compressor and said valves; a control circuit for controlling the operation of said compressor and the operation of said first and second valves including a first coil magnetically coupled to said first valve for controlling said first valve, a first relay switch connected to said first coil for controlling the current through said first coil, a second coil magnetically coupled to said second valve for controlling said second valve, a second relay switch connected to said second coil for controlling the current through said second coil, whereby the coolant pressure on both sides of said compressor is approximately equal while said compressor is off.
Claim 4
Dependent Claim
193 words
A refrigerator-water cooler comprising: an enclosure divided into a refrigerator compartment and a water cooler compartment; a cooling system adapted to receive a coolant including: a first evaporator included in said refrigerator compartment, a second evaporator included in said water cooler compartment, a compressor connected to one side of said first and second evaporators, first and second valves connected respectively to the other sides of said first and second evaporators, said first and second valves being open at least while said compressor is off, a condenser connected between said compressor and said valves; a control circuit for controlling the operation of said compressor and the operation of said first and second valves including a first coil magnetically coupled to said first valve for controlling said first valve, a first relay switch connected to said first coil for controlling the current through said first coil, a second coil magnetically coupled to said second valve for controlling said second valve, a second relay switch connected to said second coil for controlling the current through said second coil, whereby the coolant pressure on both sides of said compressor is approximately equal while said compressor is off.
Claim 5
Dependent Claim
142 words
A cooling system and control circuit comprising: first and second enclosed compartments; first and second evaporators respectively included in said first and second compartments for absorbing heat; first and second thermostats respectively included in said first and second compartments for sensing temperature; input means for connecting the control circuit to a source of operating potential; first and second switches connected to said input means and controlled respectively by said first and second thermostats; a compressor connected to said first and second switches; said compressor connected to a cooling system including said first and second evaporators, first and second valves respectively connected to said first and second evaporators for controlling cooling fluid flow; means for opening and closing said first and second valves in response to said first and second thermostats whereby said valves remain open at least while said compressor is off.
Claim 6
Dependent Claim
142 words
A cooling system and control circuit comprising: first and second enclosed compartments; first and second evaporators respectively included in said first and second compartments for absorbing heat; first and second thermostats respectively included in said first and second compartments for sensing temperature; input means for connecting the control circuit to a source of operating potential; first and second switches connected to said input means and controlled respectively by said first and second thermostats; a compressor connected to said first and second switches; said compressor connected to a cooling system including said first and second evaporators, first and second valves respectively connected to said first and second evaporators for controlling cooling fluid flow; means for opening and closing said first and second valves in response to said first and second thermostats whereby said valves remain open at least while said compressor is off.
Claim 7
Dependent Claim
24 words
A cooling system and control circuit as set forth in claim 3 wherein said first and said second valves operate independently of one another.
Claim 8
Dependent Claim
97 words
A cooling system and control circuit as set forth in claim 3 wherein said first and second switches are connected in parallel; third and fourth switches connected to sAid first and second switches, said third and fourth switch being respectively complimentary to said first and second switches; first and second relays respectively connected to said third and fourth switches and further connected to said input means; first and second valve coils respectively connected to said first and second relays and further respectively coupled to said first and second valves for controlling the fluid flow through said valves.
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |