Stoves and furnaces – Tool having fluid fuel burner – Curling iron
Patent
1980-03-31
1981-07-28
Yeung, James C.
Stoves and furnaces
Tool having fluid fuel burner
Curling iron
126435, 126285R, 236 49, 237 46, F24J 302
Patent
active
042804817
ABSTRACT:
The present forced-air heat exchange system has a solar collector through which air is circulated by a blower to the air inlet of a heat exchanger. The heat exchanger has an air outlet connected to a recirculation duct leading to the air inlet of the blower. A recirculation damper in this duct is open when the temperature of the recirculated air in the system is higher than that of the ambient air outside the system, and it closes when the ambient air temperature is higher. Pressure sensitive draft regulators at the inlet and outlet sides of the recirculation damper remain closed when the damper is open and they open automatically when the damper closes, thereby admitting ambient air into the recirculation duct at the outlet side of the damper and venting the recirculation duct at the inlet side of the damper.
REFERENCES:
patent: 2553073 (1951-05-01), Barnett
patent: 3997108 (1976-12-01), Mason
patent: 4051999 (1977-10-01), Granger et al.
patent: 4196719 (1980-04-01), Skrivseth
patent: 4228786 (1980-10-01), Frankenfield
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