US3703814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cold finger dehumidification system
Assignee: Integrated Development and Manufacturing
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Filing: 1970-06-05
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Granted: 1972-11-28
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Expires: 1990-06-05
Abstract
Abstract A dehumidification arrangement for air in a closed circulating system wherein the air is passed at a relatively high velocity over a first cooling coil having a surface area and temperature such as to cool the air to approximately the ultimate desired temperature and thence a portion only of the air is passed at a relatively low velocity past a second cooling coil at a temperature at or below the dew point temperature of the water vapor in the air. In one arrangement, the second cooling coil is baffled so that none of the air directly impinges thereon. A much greater amount of moisture is removed with a lower cooling load on the second coil.
Inventors
- 👤 Noel Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:48
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F3/1405
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
128 words
Apparatus for treating a gas to a predetermined ultimate temperature and humidity including a compressor, the outlet of which is connected to a first coil and a second coil, said first coil and said second coil being arranged sequentially so that the gas to be treated flows in series over said first coil and said second coil, said second coil serving to dehumidify said gas and said second coil having a frontal area less than about one-tenth (1/10) of the frontal area of said first coil, said second coil further having baffle means disposed upstream of said second coil in the direction of gas flow whereby said second coil, or a portion thereof, is shielded by said baffle means from direct impingement of gas on said second coil.
Claim 2
Dependent Claim
128 words
Apparatus for treating a gas to a predetermined ultimate temperature and humidity including a compressor, the outlet of which is connected to a first coil and a second coil, said first coil and said second coil being arranged sequentially so that the gas to be treated flows in series over said first coil and said second coil, said second coil serving to dehumidify said gas and said second coil having a frontal area less than about one-tenth (1/10) of the frontal area of said first coil, said second coil further having baffle means disposed upstream of said second coil in the direction of gas flow whereby said second coil, or a portion thereof, is shielded by said baffle means from direct impingement of gas on said second coil.
Claim 3
Independent Claim
99 words
A method of treating gas to a predetermined ultimate temperature and humidity comprising the steps of: a. a continuously moving said gas over a first heat exchanger coil while maintaining said coil at a temperature to cool the gas discharging therefrom to approximately the desired ultimate temperature; b. then passing said air over a second heat exchanger coil while maintaining said second heat exchanger coil at a temperature substantially below the dew point of the air at said humidity; and, c. baffling the front area of said second coil so that the moving air does not directly impinge thereon.
Claim 4
Independent Claim
99 words
A method of treating gas to a predetermined ultimate temperature and humidity comprising the steps of: a. a continuously moving said gas over a first heat exchanger coil while maintaining said coil at a temperature to cool the gas discharging therefrom to approximately the desired ultimate temperature; b. then passing said air over a second heat exchanger coil while maintaining said second heat exchanger coil at a temperature substantially below the dew point of the air at said humidity; and, c. baffling the front area of said second coil so that the moving air does not directly impinge thereon.
Claim 5
Independent Claim
91 words
The method of treating air to an ultimate predetermined temperature and humidity content comprising the steps of providing a first heat exchanger coil, maintaining said coil at a predetermined temperature at least above the dew point temperature of the ultimate air temperature and thereafter passing said air over a second heat exchanger coil maintained at a temperature substantially below the dew point temperature of the ultimate air, said second heat exchanger coil having a frontal area not greater than one-tenth (1/10) of the cross-sectional area of the column of moving air.
Claim 6
Independent Claim
91 words
The method of treating air to an ultimate predetermined temperature and humidity content comprising the steps of providing a first heat exchanger coil, maintaining said coil at a predetermined temperature at least above the dew point temperature of the ultimate air temperature and thereafter passing said air over a second heat exchanger coil maintained at a temperature substantially below the dew point temperature of the ultimate air, said second heat exchanger coil having a frontal area not greater than one-tenth (1/10) of the cross-sectional area of the column of moving air.
Claim 7
Dependent Claim
93 words
Apparatus for conditioning air comprising first and second heat exchanger coils and means for moving air to be conditioned past said first coil and then past second coil, means for supplying coolant to said first coil at a temperature above the dew point of the air exiting from said second coil, means for cooling said second coil to a temperature substantially below the dew point temperature of the air issuing from the first coil, said second coil having a frontal area not greater than one-tenth (1/10) the frontal area of the first coil.
Claim 8
Dependent Claim
93 words
Apparatus for conditioning air comprising first and second heat exchanger coils and means for moving air to be conditioned past said first coil and then past second coil, means for supplying coolant to said first coil at a temperature above the dew point of the air exiting from said second coil, means for cooling said second coil to a temperature substantially below the dew point temperature of the air issuing from the first coil, said second coil having a frontal area not greater than one-tenth (1/10) the frontal area of the first coil.
Claim 9
Dependent Claim
18 words
The improvement of claim 3 wherein said air is deflected away from direct impingement on said second coil.
Claim 10
Independent Claim
102 words
A method of cooling and lowering the humidity of air in a generally closed system comprising continuously circulating said air over a first heat exchanger coil maintained at a temperature at least above the dew point temperature of the ultimate air temperature at a first velocity and passing a portion only of said air over a second heat exchanger coil maintained at a temperature substantially below the dew point temperature of the ultimate air, and reducing the velocity of the air in contact with said second coil substantially below the velocity of the air in contact with said first heat exchanger coil.
Claim 11
Independent Claim
102 words
A method of cooling and lowering the humidity of air in a generally closed system comprising continuously circulating said air over a first heat exchanger coil maintained at a temperature at least above the dew point temperature of the ultimate air temperature at a first velocity and passing a portion only of said air over a second heat exchanger coil maintained at a temperature substantially below the dew point temperature of the ultimate air, and reducing the velocity of the air in contact with said second coil substantially below the velocity of the air in contact with said first heat exchanger coil.
Claim 12
Dependent Claim
60 words
Apparatus for reducing the humidity of air comprising a heat exchanger coil having a frontal area transverse to the stream of air to be dehumidified substantially less than the cross-sectional area of the stream of air and baffle means positioned between the front of said coil for deflecting the stream of air away from the frontal surfaces of said coil.
Claim 13
Dependent Claim
60 words
Apparatus for reducing the humidity of air comprising a heat exchanger coil having a frontal area transverse to the stream of air to be dehumidified substantially less than the cross-sectional area of the stream of air and baffle means positioned between the front of said coil for deflecting the stream of air away from the frontal surfaces of said coil.
Claim 14
Dependent Claim
17 words
The coil of claim 7 wherein said baffle means are in heat insulated relationship from said coil.
Claim 15
Dependent Claim
41 words
The improvement of claim 1 further including back pressure control means for controlling the back pressure imposed on said first coil, said back pressure control means being positioned between the discharge of said first coil and the inlet to said compressor.
Claim 16
Dependent Claim
21 words
The improvement of claim 9 wherein the back pressure on said second coil is controlled by the inlet to said compressor.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |