Apparatus and method for controlling a heat pump water heater

Details Apparatus and method for controlling a heat pump water heater Apparatus and method for controlling a heat pump water heater

1983-01-20

1985-01-08

Wayner, William E.

Refrigeration

Automatic control

Of external fluid or means

622386, 126374, 236 20R, 236DIG6, F25D 1700

Patent

active

044920911

ABSTRACT:
A method and apparatus for controlling the operation of an add-on heat pump water heater unit is disclosed. A combination of a thermally conductive tube having a flattened portion and a thermostat mounted thereto is utilized to sense the temperature level of water in a tank to which the heater unit is connected. The tube and thermostat are additionally insulated from the ambient. A circulating pump is provided and connected to the water thermostat such that the pump is energized only when it is necessary to operate the heat energy adding unit.

REFERENCES:
patent: 2096697 (1937-10-01), Long
patent: 2577694 (1951-12-01), Winn
patent: 2577902 (1951-12-01), McGrath
patent: 3171387 (1965-03-01), Muller
patent: 4073285 (1978-02-01), Wendell
patent: 4226606 (1980-10-01), Yaeger et al.
patent: 4281519 (1981-08-01), Spath et al.
patent: 4330309 (1982-05-01), Robinson, Jr.

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