Heat exchange – Movable heating or cooling surface – Rotary drum
Patent
1979-03-12
1981-04-21
Tapolcai, Jr., William E.
Heat exchange
Movable heating or cooling surface
Rotary drum
165 43, 236 84, F25B 2900
Patent
active
042627389
ABSTRACT:
A plurality of movable dampers (23), (26), (31) are provided in an air flow duct (12) to control the temperature and air flow therethrough. A heater core (19) and/or air conditioner evaporator (18) are disposed in the duct (12). The dampers (23), (26), (31) are positioned by vacuum actuators (28), (29), (33) in accordance with applied vacuum. Sensors (47), (48), (49) sense the temperature in the duct (12), an automobile passenger compartment into which the duct (12) leads and the like. A control means unit (44) modulates vacuum from a source (34) in accordance with sensed temperature so as to maintain the temperature at a desired value. In case of failure of the automatic control unit (44), a manual valve unit (51), (53), (56) may be operated to connect the actuators (28), (29), (31) either to the vacuum source (34) or to the atmosphere so as to position the dampers (23), (26), (31) minimum or maximum temperature operation respectively.
REFERENCES:
patent: 2719535 (1955-10-01), Anderson
patent: 2966032 (1960-12-01), Weymouth, Jr.
patent: 3061453 (1975-01-01), Grier et al.
patent: 3263739 (1966-08-01), Gaskill et al.
patent: 3434388 (1969-03-01), Julow et al.
patent: 3707980 (1973-01-01), Bergamini
patent: 4153068 (1979-05-01), Yoshida
Kato Nobuhiro
Ohtani Masami
Alexander David G.
Diesel Kiki Co. Ltd.
Tapolcai, Jr. William E.
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