Stoves and furnaces – Tool having fluid fuel burner – Curling iron
Patent
1982-02-18
1984-10-02
Yeung, James C.
Stoves and furnaces
Tool having fluid fuel burner
Curling iron
126419, 165 34, F24J 302
Patent
active
044741693
ABSTRACT:
A control arrangement particularly useful in solar heat collecting systems utilizing a heat transfer medium which is heated during circulation through first and second solar collectors and emitted to a receiver. The first and second solar collectors, including absorber plates to be heated by the sun, are disposed in generally planor relation. The control arrangement compares a first signal responsive to the temperature of the first solar collector absorber plate with a second signal responsive to a selected reference temperature and provides an output signal to control means which operate valve means to control flow of the heat transfer fluid to the first and second solar collectors. The control means directs the heat transfer fluid from the outlet of the first solar collector to the receiver when the first signal and second signal are in a first relationship and directs the fluid from the outlet of the second solar collector and from the outlet of the first solar collector and from the outlet of the second solar collector to the receiver when the first signal and the second signal are in a second relationship.
In another feature means are provided to control rate of flow of the heat transfer fluid through the first and second solar collectors in response to selected relationship between the first signal and the second signal.
REFERENCES:
patent: 3981295 (1976-09-01), Minnick
patent: 3994279 (1976-11-01), Barak
patent: 4031880 (1977-06-01), Devin
patent: 4121566 (1978-10-01), Radenkovic
patent: 4126122 (1978-11-01), Bross
patent: 4168030 (1979-09-01), Timmerman
patent: 4184481 (1980-01-01), Tornquist
patent: 4257395 (1981-03-01), Kiieder
patent: 4327705 (1982-05-01), Steutermann
patent: 4387422 (1983-06-01), Steutermann
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