Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1983-08-05
1986-01-28
Bartis, A.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
126101, 165146, 165181, 219328, 219365, 237 16, H05B 102, H05B 382, F24H 308, F24D 1304
Patent
active
045673519
ABSTRACT:
An electric space heater includes a housing having inlet and outlet openings and enclosing a heat exchange structure having a main tube and a secondary tube communicated by conduit pipes to define a closed space, exhausted of air, in which a working fluid performs a cycle of vaporization and condensation. The main and secondary tubes each have a uniform diameter and are horizontally disposed in parallel relation with the conduit pipes extending upwardly from the main tube to the secondary tube. Extending the entire length of the main tube is a protective pipe enclosing an electric resistance heating element. The working fluid fills the main tube to a level completely immersing the protective tube, the remainder of the closed space being empty. The main and secondary tubes are provided with spaced radiation fins, with the fins on the secondary tube being at a wider spacing than those of the main tube. In operation the working fluid is vaporized by the heating element and expands into the secondary tube where it condenses to give up its latent heat of vaporization to the air passing through the housing. The condensed fluid flows by gravity through the conduit pipes back to the main tube thus producing a continuous cycle of vaporization and condensation in the closed space. The heating element is controlled by an automatically resettable control thermostat provided on the secondary tube. A manually resettable safety thermostat operable at a higher temperature than the control thermostat is provided on the main tube for disconnecting the heating element to prevent damage to the space heater from excessive heating.
REFERENCES:
patent: 1007000 (1911-10-01), Gold
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patent: 3422249 (1969-01-01), Grossinger
patent: 4124794 (1978-11-01), Eder
Kitagawa Yoshiaki
Ohki Koichiro
Sarada Toshio
Bartis A.
Matsushita Electric & Works Ltd.
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