Heat exchange – Movable heating or cooling surface – Rotary drum
Patent
1978-10-20
1980-10-28
Davis, Albert W.
Heat exchange
Movable heating or cooling surface
Rotary drum
137112, 165 31, 165 40, 165 42, 165 58, F25B 2900
Patent
active
042301742
ABSTRACT:
An improvement in a heating and air conditioning system for a mobile home or the like including a system of air ducts for distributing the air within the mobile home, a heating unit, a cooling unit; and characterized by a plenum chamber that includes respective connected hot and cold air inlet apertures and valve seats, and at least one outlet opening connected with the air ducts; and a large hollow lightweight poppet disposed intermediate the hot and cold air valve seats. The large hollow poppet is moveable responsive to respective directions of air flow to and away from the hot and cold air valve seats so as to permit flow from one of the heating and cooling units and to block reverse flow into the other. Also provided are guide means for freely and accurately guiding the hollow poppet between its respective seating engagement positions. Also disclosed are specific embodiments, including a preferred embodiment in which the large hollow poppet is a ball whose exterior surfaces can seat at any of the relative positions against the valve seats.
REFERENCES:
patent: 3851866 (1974-12-01), Knuppet et al.
patent: 3908751 (1975-09-01), Sheppard
Davis Albert W.
Focarino Margaret A.
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