Electric resistance heating devices – Heating devices – Convection space heater
Patent
1995-10-12
1998-02-24
Hoang, Tu B.
Electric resistance heating devices
Heating devices
Convection space heater
392367, 392403, 126101, 237 16, 237 79, H05B 102, F24H 308, F24D 1304
Patent
active
057218048
ABSTRACT:
A space heater employs a generally Y-shaped housing. A boiler within the housing contains a working fluid at subatmospheric pressure when at ambient temperature. This reduces the boiling point of working fluid. A series of heat exchangers are mounted in the branch portions of the housing and connected to receive working fluid from the boiler. A blower directs ambient air between the heat exchangers and through the front openings of the housing. A valve can be operated to release pressure from within the boiler and heat exchangers. An electric heating element heats the working fluid within the boiler to a temperature above the boiling point under normal operating conditions. During initial manufacture or repair of the unit, the heating element is activated to heat the working fluid while the valve is open, and then deactivated with the valve is closed to allow the working fluid to cool, thereby creating reduced pressure within the boiler. In the preferred embodiment, the boiler and heat exchangers are die-cast as a single unit to reduce costs and increase durability. The heating element is threaded into the boiler to reduce costs and simplify replacement.
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Heatech International, Inc.
Hoang Tu B.
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