US3590910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating-cooling air-conditioning system control
Assignee: Trane US Inc
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Filing: 1970-01-02
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Granted: 1971-07-06
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Expires: 1990-01-02
Abstract
Abstract A zone-type heating-cooling air-conditioning system is shown wherein each zone or unit is provided with a primary heat exchanger circuit and a secondary heat exchanger circuit. The primary heat exchanger is arranged to be supplied with warm water during the heating season and chilled water during the cooling season. The secondary heat exchanger is arranged to be supplied with domestic warm water. Each of the heat exchangers is provided with a control valve for controlling the circulation of heat exchange fluid therethrough. A fan is arranged to circulate air of the respective zone serially in heat exchange relationship with the primary heat exchanger and the secondary heat exchanger. A zone temperature control system responsive to the temperature of the respective zone and the temperature of the heat exchange fluid being supplied to the primary heat exchanger controls the operation of the valves and fan.
Inventors
- 👤 John W Lorenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:41
CPC Classifications
F; F24; F24F; F24F5/00; F24F5/0003; F24F11/00; F24F11/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
351 words
Apparatus for air-conditioning a space comprising: a first heat exchanger adapted to conduct chilled and warm heat exchange liquid therethrough for cooling and heating said space; a second heat exchanger adapted to conduct warm heat exchange liquid therethrough for heating said space; a source of chilled heat exchange liquid for said first heat exchanger; a source of warm heat exchange liquid for said first heat exchanger; a source of warm heat exchange liquid for said second heat exchanger; first conduit means for conducting heat exchange liquid from said source of chilled heat exchange liquid and from said source of warm heat exchange liquid for said first heat exchanger to the inlet of said first heat exchanger; second conduit means for conducting warm heat exchange liquid from said source of warm heat exchange liquid for said second heat exchanger to the inlet of said second heat exchanger; first valve means for interrupting the flow of heat exchange liquid through said first heat exchanger; second valve means for interrupting the flow of heat exchange liquid through said second heat exchanger; fan means for passing air for the conditioned space in heat exchange relationship with said first and second heat exchangers; means for maintaining said first valve means open in response to a first condition of simultaneous demand for heating said space and the presence of warm heat exchange liquid in said first conduit means; means for maintaining said first valve means open and said second valve means closed in response to a second condition of simultaneous demand for cooling said space and the presence of chilled heat exchange liquid in said first conduit means; means for maintaining said second valve means open and said first valve means closed in response to a third condition of simultaneous demand for heating said space and the presence of chilled heat exchange liquid in said first conduit means; and fan control means for energizing said fan means in response to any of said first, second and third conditions and deenergizing said fan means in response to the absence of all of said first, second and third conditions.
Claim 2
Dependent Claim
351 words
Apparatus for air-conditioning a space comprising: a first heat exchanger adapted to conduct chilled and warm heat exchange liquid therethrough for cooling and heating said space; a second heat exchanger adapted to conduct warm heat exchange liquid therethrough for heating said space; a source of chilled heat exchange liquid for said first heat exchanger; a source of warm heat exchange liquid for said first heat exchanger; a source of warm heat exchange liquid for said second heat exchanger; first conduit means for conducting heat exchange liquid from said source of chilled heat exchange liquid and from said source of warm heat exchange liquid for said first heat exchanger to the inlet of said first heat exchanger; second conduit means for conducting warm heat exchange liquid from said source of warm heat exchange liquid for said second heat exchanger to the inlet of said second heat exchanger; first valve means for interrupting the flow of heat exchange liquid through said first heat exchanger; second valve means for interrupting the flow of heat exchange liquid through said second heat exchanger; fan means for passing air for the conditioned space in heat exchange relationship with said first and second heat exchangers; means for maintaining said first valve means open in response to a first condition of simultaneous demand for heating said space and the presence of warm heat exchange liquid in said first conduit means; means for maintaining said first valve means open and said second valve means closed in response to a second condition of simultaneous demand for cooling said space and the presence of chilled heat exchange liquid in said first conduit means; means for maintaining said second valve means open and said first valve means closed in response to a third condition of simultaneous demand for heating said space and the presence of chilled heat exchange liquid in said first conduit means; and fan control means for energizing said fan means in response to any of said first, second and third conditions and deenergizing said fan means in response to the absence of all of said first, second and third conditions.
Claim 3
Dependent Claim
35 words
The apparatus as defined by claim 1 wherein said source of warm heat exchange liquid for said first heat exchanger is separate from said source of warm heat exchange liquid for said second heat exchanger.
Claim 4
Dependent Claim
27 words
The apparatus as defined by claim 2 wherein said source of warm heat exchange Liquid for said second heat exchanger is a source of domestic hot water.
Claim 5
Dependent Claim
17 words
The apparatus as defined by claim 1 including means for selecting the speed of said fan means.
Claim 6
Dependent Claim
69 words
The apparatus as defined by claim 1 including a first switch responsive to the temperature of the heat exchange fluid in said first conduit means; a second switch responsive to the temperature of said space; a relay switch for controlling said fan means; a relay coil for actuating said relay switch; and an electric circuit connecting said first switch, said second switch and said relay coil in series relationship.
Claim 7
Dependent Claim
21 words
The apparatus as defined by claim 1 wherein said fan means passes air serially through said first and second heat exchangers.
Claim 8
Dependent Claim
310 words
Apparatus for air-conditioning a space comprising: a first heat exchanger adapted to conduct chilled and warm heat exchange liquid therethrough for cooling and heating said space respectively; a second heat exchanger for heating said space; a source of chilled heat exchange liquid for said first heat exchanger; a source of warm heat exchange liquid for said first heat exchanger; a source of energy for said second heat exchanger; conduit means for conducting heat exchange liquid from said source of chilled heat exchange liquid and from said source of warm heat exchange liquid to the inlet of said first heat exchanger; means for conveying energy from said source of energy to said second heat exchanger; valve means for interrupting the flow of heat exchange liquid through said first heat exchanger; second means for interrupting the supply of energy to said second heat exchanger; fan means for passing air for the conditioned space in heat exchange relationship with said first and second heat exchangers; means for maintaining said valve means open in response to a first condition of simultaneous demand for heating said space and the presence of warm heat exchange liquid in said conduit means; means for maintaining said valve means open and said second means in its interrupting condition in response to a second condition of simultaneous demand for cooling said space and the presence of chilled heat exchange liquid in said conduit means; means for rendering said second means ineffective and said valve means closed in response to a third condition of simultaneous demand for heating said space and the presence of chilled heat exchange liquid in said conduit means; and fan control means for energizing said fan means in response to any of said first, second and third conditions and deenergizing said fan means in response to the absence of all of said first, second and third conditions.
Claim 9
Dependent Claim
310 words
Apparatus for air-conditioning a space comprising: a first heat exchanger adapted to conduct chilled and warm heat exchange liquid therethrough for cooling and heating said space respectively; a second heat exchanger for heating said space; a source of chilled heat exchange liquid for said first heat exchanger; a source of warm heat exchange liquid for said first heat exchanger; a source of energy for said second heat exchanger; conduit means for conducting heat exchange liquid from said source of chilled heat exchange liquid and from said source of warm heat exchange liquid to the inlet of said first heat exchanger; means for conveying energy from said source of energy to said second heat exchanger; valve means for interrupting the flow of heat exchange liquid through said first heat exchanger; second means for interrupting the supply of energy to said second heat exchanger; fan means for passing air for the conditioned space in heat exchange relationship with said first and second heat exchangers; means for maintaining said valve means open in response to a first condition of simultaneous demand for heating said space and the presence of warm heat exchange liquid in said conduit means; means for maintaining said valve means open and said second means in its interrupting condition in response to a second condition of simultaneous demand for cooling said space and the presence of chilled heat exchange liquid in said conduit means; means for rendering said second means ineffective and said valve means closed in response to a third condition of simultaneous demand for heating said space and the presence of chilled heat exchange liquid in said conduit means; and fan control means for energizing said fan means in response to any of said first, second and third conditions and deenergizing said fan means in response to the absence of all of said first, second and third conditions.
References Cited (Backward Citations)
US2468626A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |