| 摘要 |
A closed circuit heating system for use as a baseboard heater or the like comprises a sealed tank containing an annular heating element enveloping a heating rod, insulating means for mounting said annular heating element and heating rod in a fixed spatial relationship relative to each other and the tank, and means enabling said heating element and heating rod to be connected to a source of electricity. An elongated heat conducting outlet tube is connected to an elongated heat conducting return tube, the tubes being connected to the sealed tank with the outlet tube above the return tube to form a liquid flow path in the form of a loop. The heating element and heating rod are completely submerged in a heat conducting liquid, and both of the tubes are filled with the liquid.
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