Patent US3850007A successfully refreshed from Google Patents.
US3850007A
Expired / Lapsed
US
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Air conditioning system and method
Assignee: Individual
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Filing: 1974-01-24
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Granted: 1974-11-26
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Expires: 1994-01-24
Abstract
Abstract Air conditioning systems particularly suitable for large buildings located where water is not available for evaporative cooling to provide a heat sink. The condensate from the conditioned air is collected at the cooling and dehumidifying coils and is used as make-up water for one or more evaporative cooling towers which act as the heat sink. One of the cooling towers provides cooling solely by conduction with outside air. Air is exhausted from the conditioned space through one of the cooling towers so as to utilize the evaporation of the condensate in the low temperature and low relative humidity air. The invention also provides for improved operation and efficiency in systems without regard to utilizing condensate for evaporative cooling.
Inventors
- 👤 A Mcfarlan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:06
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/06; F24F11/00; F24F11/70; F24F11/80; F24F11/83; F24F11/84; F24F11/85; F28; F28D; F28D5/00; F28D21/00; F28D2021/0019
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
157 words
In an air conditioning system for a plurality of zones one of which requires cooling while another requires heating, the combination of, a plurality of refrigeration units each of which has an evaporator-chiller through which liquid flows to provide staged cooling for a stream of chilled liquid and condenser means through which liquid flows to provide a stream of hot liquid, means to supply said chilled liquid and said hot liquid for utilization to cool air and to form condensate and to heat air as is required for said zones, heat sink means comprising first and second cooling towers through which cooling liquid flows in series after being heated in condenser means of said refrigeration units, said first cooling tower effecting the cooling of said cooling liquid solely by heat exchange relationship with the outside air and said second cooling tower including means to evaporate condensate water in a stream of air to cool said cooling liquid.
Claim 2
Dependent Claim
157 words
In an air conditioning system for a plurality of zones one of which requires cooling while another requires heating, the combination of, a plurality of refrigeration units each of which has an evaporator-chiller through which liquid flows to provide staged cooling for a stream of chilled liquid and condenser means through which liquid flows to provide a stream of hot liquid, means to supply said chilled liquid and said hot liquid for utilization to cool air and to form condensate and to heat air as is required for said zones, heat sink means comprising first and second cooling towers through which cooling liquid flows in series after being heated in condenser means of said refrigeration units, said first cooling tower effecting the cooling of said cooling liquid solely by heat exchange relationship with the outside air and said second cooling tower including means to evaporate condensate water in a stream of air to cool said cooling liquid.
Claim 3
Dependent Claim
24 words
An air conditioning system as described in claim 1 wherein said second cooling tower receives air discharged from one or more of said zones.
Claim 4
Dependent Claim
26 words
An air conditioning system as described in claim 1 which includes means to vary the rate of cooling of said cooling liquid by said cooling towers.
Claim 5
Dependent Claim
32 words
An air conditioning system as described in claim 3 wherein said means to vary the rate of said cooling comprises a controlled throttling valve in the flow circuit of said cooling liquid.
Claim 6
Dependent Claim
29 words
An air conditioning system as described in claim 3 wherein said means to vary the rate of said cooling comprises a variable speed pump which circulates said cooling liquid.
Claim 7
Dependent Claim
30 words
An air conditioning system as described in claim 3 wherein said means to vary the rate of said cooling comprises variable volume air circulating means for said first cooling tower.
Claim 8
Dependent Claim
48 words
An air conditioning system as described in claim 3 wherein said condenser means for each of said refrigeration units comprises two parallel condenser sections through one of which said liquid flows to form said stream of hot water and through the other of which said cooling liquid flows.
Claim 9
Dependent Claim
46 words
An air conditioning system as described in claim 3 wherein said condenser means for each of said refrigeration units comprises a single condenser section, and wherein said cooling liquid and said streams of hot liquid and chilled liquid are water and constitute a single liquid system.
Claim 10
Dependent Claim
60 words
A sysTem as described in claim 8 which includes a master controller system which is programmed and arranged to exert overall control upon the entire system in accordance with the temperature of said hot liquid and which acts in response to a drop in the temperature of said hot liquid to reduce the rate of flow of said cooling liquid.
Claim 11
Dependent Claim
43 words
An air conditioning system as described in claim 9 wherein said master controller includes means responsive to a drop in said cooling liquid temperature below a predetermined value to override the control signal for reducing the rate of circulation of said cooling liquid.
Claim 12
Dependent Claim
60 words
A system as described in claim 7 which includes a master controller system which is programmed and arranged to exert overall control upon the entire system in accordance with the temperature of said hot liquid and which acts in response to a drop in the temperature of said hot liquid to reduce the rate of flow of said cooling liquid.
Claim 13
Dependent Claim
60 words
A system as described in claim 1 which icnludes a master controller system which is programmed and arranged to exert overall control upon the entire system in accordance with the temperature of said hot liquid and which acts in response to a drop in the temperature of said hot liquid to reduce the rate of flow of said cooling liquid.
Claim 14
Dependent Claim
169 words
In an air conditioning system for a plurality of zones one of which requires coooling while another requires heating, the combination of, a plurality of refrigeration units each of which has an evaporator-chiller through which liquid flows to provide staged cooling for a stream of chilled liquid, said refrigeration means having condenser means through which liquid flows to provide a stream of heated liquid, means to supply said chilled liquid and said heated liquid for utilization to cool air and to form condensate and to heat air as is required for said zones, heat sink means comprising first and second cooling towers through which condenser heat is discharged from said condenser means of said refrigeration units, said first cooling tower effecting the cooling solely by heat exchange relationship with the outside air and said second cooling tower including means to evaporate condensate water in a stream of air to effect the cooling, and means to discharge air from one or more of said zones through said second cooling tower.
Claim 15
Dependent Claim
169 words
In an air conditioning system for a plurality of zones one of which requires coooling while another requires heating, the combination of, a plurality of refrigeration units each of which has an evaporator-chiller through which liquid flows to provide staged cooling for a stream of chilled liquid, said refrigeration means having condenser means through which liquid flows to provide a stream of heated liquid, means to supply said chilled liquid and said heated liquid for utilization to cool air and to form condensate and to heat air as is required for said zones, heat sink means comprising first and second cooling towers through which condenser heat is discharged from said condenser means of said refrigeration units, said first cooling tower effecting the cooling solely by heat exchange relationship with the outside air and said second cooling tower including means to evaporate condensate water in a stream of air to effect the cooling, and means to discharge air from one or more of said zones through said second cooling tower.
References Cited (Backward Citations)
CH146211A
Cited
US2212356A
Cited
US2297928A
Cited
US2296997A
Cited
US2797068A
Cited
US2935857A
Cited
US3026690A
Cited
US3067587A
Cited
US3628600A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |