US4918934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for cooling rooms
Assignee: Individual
•
Filing: 1988-09-21
•
Granted: 1990-04-24
•
Expires: 2008-09-21
Abstract
Abstract In a method for cooling rooms, the energy exchange between warm room air and cold air takes place through inherent convection of the air by means of a drop shaft arranged in the room, which has cooling surfaces in its upper part, at which the in-coming warm room air cools, and flows downwards owing to the specific weight difference. The cooled air leaves the drop shaft at the lower end in a laminar flow and then spreads in the room in an unbroken cool layer. The air leaving the drop shaft can also be deflected into a hollow floor. It is possible to use a fan to add to the cooled air current moved by gravity disturbing air, which then occasions turbulence.
Inventors
- 👤 Georg Mayer
- 👤 Friedrich H. Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:47
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/30; F24F7/00; F24F7/04; F24F2007/004
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
108 words
A method for dissipating thermal loads of a room using an extremely low air flow rate comprising, providing a drop shaft in a room allowing warm air to contact said drop shaft which has cooling surfaces in its upper part to cool and move air warm air entering the drop shaft at its upper end is cooled and is moved downwards by gravity to leave the drop shaft at its lower end, deflecting air leaving the drop shaft at its lower end into a hollow floor and passing said air from the hollow floor through predetermined openings, under or next to the thermal loads located in the room.
Claim 2
Independent Claim
108 words
A method for dissipating thermal loads of a room using an extremely low air flow rate comprising, providing a drop shaft in a room allowing warm air to contact said drop shaft which has cooling surfaces in its upper part to cool and move air warm air entering the drop shaft at its upper end is cooled and is moved downwards by gravity to leave the drop shaft at its lower end, deflecting air leaving the drop shaft at its lower end into a hollow floor and passing said air from the hollow floor through predetermined openings, under or next to the thermal loads located in the room.
Claim 3
Independent Claim
84 words
A method for dissipating thermal loads of a room using an extremely low air flow rate comprising, providing a drop shaft in a room, allowing warm air to contact said drop shaft which has cooling surfaces in its upper part to cool and move air, is moved downwards by gravity to leave the drop shaft at its lower end, and feeding one or more air currents generated by a fan at arbitrary locations as disturbing air to the air emerging from the drop shaft.
Claim 4
Independent Claim
84 words
A method for dissipating thermal loads of a room using an extremely low air flow rate comprising, providing a drop shaft in a room, allowing warm air to contact said drop shaft which has cooling surfaces in its upper part to cool and move air, is moved downwards by gravity to leave the drop shaft at its lower end, and feeding one or more air currents generated by a fan at arbitrary locations as disturbing air to the air emerging from the drop shaft.
Claim 5
Dependent Claim
19 words
A method according to claim 2, wherein disturbing air is fed only when persons are present in the room.
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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) | 1993-04-23 | 1993-10-23 | 1994-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-23 | 1997-10-23 | 1998-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-23 | 2001-10-23 | 2002-04-24 | $7700.00 | Window Closed / Lapsed |