Changeover valve for a central air conditioning unit

Details Changeover valve for a central air conditioning unit Changeover valve for a central air conditioning unit

1989-04-28

1990-03-20

Ford, John

Heat exchange

Movable heating or cooling surface

Rotary drum

236 1B, 236 1C, 236 494, F25B 2900

Patent

active

049093088

ABSTRACT:
A valve is provided with one inlet and two outlets with one of the outlets being normally closed by a valve in the form of a film disc carried by a flexible blade. A magnetic pad secured to the blade is attracted by the proximity of an actuator carrier magnetic element to cause the flexing of the blade to open the normally closed outlet and to close the normally open outlet. The actuator may be either thermally or electrically actuated and is suitable to override a bleed thermostat to permit warm-up of an overcooled area or to cause a switchover in operation between a heating and cooling mode by connecting the appropriate bleed thermostat so as to control the inflation of the bellows.

REFERENCES:
patent: 2244555 (1941-06-01), Harris
patent: 2575086 (1951-11-01), Atchison
patent: 3165263 (1965-01-01), Dreibelbis
patent: 3172600 (1965-03-01), Miner
patent: 3450342 (1969-06-01), Arledge, Jr.
patent: 3457955 (1969-07-01), Kleiner et al.
patent: 4844149 (1989-07-01), Dreibelbis et al.
Abell, W. A. and Shakib, I. D., "Magnetically Actuated Pneumatic Valve", IBM Technical Disclosure Bulletin, vol. 12, No. 12, May 1970, p. 2302.

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