Control system for solar heater

Details Control system for solar heater Control system for solar heater

1975-12-29

1977-04-26

Sprague, Kenneth W.

Stoves and furnaces

Heaters

Surface

237 1A, 165 78, C24J 302

Patent

active

040194957

ABSTRACT:
A system for controlling the flow of a liquid through a solar heating system of the type having the output of a solar energy collector coupled to the input of a storage tank and having a circulating pump interposed along a return liquid pipe coupled between the recirculating output of the storage tank and the input of the solar energy collector. A first element senses the temperature of the liquid adjacent to the output of the solar energy collector and generates a first signal responsive thereto. A second element senses the temperature of the liquid at a second location within the solar heating system and generates a second signal responsive thereto. A first comparator is coupled between the first and second elements for generating a run signal responsive to the difference between the first and second signals exceeding a predetermined level. The control system further includes an actuating element for powering the circulating pump responsive to the run signal, whereby the liquid is circulated within the solar heating system.

REFERENCES:
patent: 2342211 (1944-02-01), Newton
patent: 2469496 (1949-05-01), Christenson
patent: 3931806 (1976-01-01), Hayes
patent: 3949732 (1976-04-01), Reines

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