Automatic temperature and humidity regulation – Ventilator type – Mechanical linkage actuated
Patent
1997-12-09
2000-01-11
Tapolcai, William E.
Automatic temperature and humidity regulation
Ventilator type
Mechanical linkage actuated
236100, G05D 2312
Patent
active
060126426
ABSTRACT:
The cross-sectional flow area of a fluid duct and/or the flow direction of a fluid flow out of a fluid duct or air outlet is controlled by a control drive with two expansion drives positioned either in axial alignment with each other or with their longitudinal axis extending preferably in parallel to each other. The two drives are thermally separated from each other so that one drive is exposed to the temperature of one fluid while the other drive is exposed to the temperature of another fluid, whereby these fluids may be the same fluid or different fluids or mixture of different fluids. Each expansion drive contains a temperature responsive expansion material so that the power for operating the flow controller is derived solely from the temperature difference between the two fluids and hence any auxiliary energy becomes unnecessary for the control purpose. In both instances the control power is transmitted through a drive transmitter, for example in the form of a slide member or in the form of a balance beam.
REFERENCES:
patent: 4155504 (1979-05-01), Caldwell
patent: 4883082 (1989-11-01), Pirkle
patent: 5022583 (1991-06-01), Bruens
patent: 5647532 (1997-07-01), De Villiers et al.
Makulla Detlef
Schulz Peter
Fasse W. F.
Fasse W. G.
H. Krantz - TKT GmbH
Tapolcai William E.
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