Electric resistance heating devices – Heating devices – Tank or container type liquid heater
Patent
1998-03-23
1999-12-07
Walberg, Teresa
Electric resistance heating devices
Heating devices
Tank or container type liquid heater
392444, 219386, A47J 2700
Patent
active
059997001
ABSTRACT:
A portable heating unit for heating a refrigerant supply tank is provided to facilitate the recharging of refrigeration units, such as air conditioning unit, refrigerators, etc. The heating unit includes a housing defining an enclosure sized to receive at least a portion of the supply tank and is adapted to be filled with water. An electrical heating element is used to heat the water. A temperature control switch is provided to cut power to the heating element when the water temperature exceeds a predetermined amount. A pressure switch is also provided to cut power to the heating element when the pressure within the supply tank exceeds a predetermined amount. The pressure switch also operates a solenoid activated outlet valve, and activates the solenoid when the supply tank pressure exceeds the predetermined pressure to evacuate the water from the housing. Lastly, the unit includes an operational pressure switch which is responsive to the pressure in a hose connected to the supply tank valve. The operational pressure switch closes the circuit containing the heating element only when the supply hose is pressurized (i.e., when it is connected to the target unit and when the tank valve is opened).
REFERENCES:
patent: 2849588 (1958-08-01), Marcuse
patent: 2859326 (1958-11-01), Fisher, Jr.
patent: 4761961 (1988-08-01), Marx
patent: 4833299 (1989-05-01), Estes
patent: 5167126 (1992-12-01), Cartwright
patent: 5265440 (1993-11-01), Baker
patent: 5339646 (1994-08-01), Verlinden et al.
patent: 5375425 (1994-12-01), Cobb
patent: 5377495 (1995-01-01), Daigle
patent: 5557940 (1996-09-01), Hendricks
patent: 5827050 (1998-10-01), Price
Campbell Thor S.
Walberg Teresa
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