Patent US3842901A successfully refreshed from Google Patents.
US3842901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning system and method
Assignee: Individual
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Filing: 1972-06-20
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Granted: 1974-10-22
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Expires: 1992-06-20
Abstract
Abstract Air conditioning systems having a plurality of refrigeration units with a hot water stream flowing through the condensers in series, and with a chilled water stream flowing through the evaporator-chillers in series. The system balances the heating and cooling loads so that the internally produced heat is used to heat the periphery when such heat is required. Excess heat is dissipated, and additional heat is provided when needed. The temperature of the hot water is higher than with the normal practice, and special advantages are obtained from the standpoint of providing efficient and dependable operations with wider ranges of the load and ambient conditions.
Inventors
- 👤 A Mcfarlan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:55
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/06; F24F3/10; F24F11/00; F24F11/70; F24F11/80; F24F11/83; F24F11/84; F24F3/12
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
223 words
The method for maintaining comfort conditions within a plurality of zones or spaces wherein one or more of the zones or spaces requires cooling when another requires heating, the steps of, producing separate streams of chilled liquid and heated liquid by staged heating and cooling steps with refrigeration units having the flow path therethrough for the heated liquid by which the heat is discharged from the refrigeration units in series relationship opposite to the series relationship of the flow path therethrough for the chilled liquid, supplying said streams of chilled liquid and heated liquid as is required to handle the respective heating and cooling loads in the various zones or spaces and returning the liquid to the refrigeration units as return liquid, whereby heat is removed from one of said zones or spaces and is delivered by the return liquid to the refrigeration units and through said refrigeration units to the stream of heated liquid and is utilized to heat an exterior zone or space, discharging heat from the system when there is an excess, and controlling the discharge of heat from the system to maintain the stream of heated liquid at a temperature within the range of 90*F to 135*F when one of said Zones or spaces requires heating with a progressively increasing temperature within said range as the heating load increases.
Claim 2
Independent Claim
223 words
The method for maintaining comfort conditions within a plurality of zones or spaces wherein one or more of the zones or spaces requires cooling when another requires heating, the steps of, producing separate streams of chilled liquid and heated liquid by staged heating and cooling steps with refrigeration units having the flow path therethrough for the heated liquid by which the heat is discharged from the refrigeration units in series relationship opposite to the series relationship of the flow path therethrough for the chilled liquid, supplying said streams of chilled liquid and heated liquid as is required to handle the respective heating and cooling loads in the various zones or spaces and returning the liquid to the refrigeration units as return liquid, whereby heat is removed from one of said zones or spaces and is delivered by the return liquid to the refrigeration units and through said refrigeration units to the stream of heated liquid and is utilized to heat an exterior zone or space, discharging heat from the system when there is an excess, and controlling the discharge of heat from the system to maintain the stream of heated liquid at a temperature within the range of 90*F to 135*F when one of said Zones or spaces requires heating with a progressively increasing temperature within said range as the heating load increases.
Claim 3
Dependent Claim
22 words
The method as described in claim 1 which includes the step of adding heat to the system to satisfy a heat deficiency.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |