A - Human Necessities – 61 – H
Patent
A - Human Necessities
61
H
309/35
A61H 33/06 (2006.01)
Patent
CA 1044295
ABSTRACT OF THE DISCLOSURE An arrangement for preventing overheating in electric air heaters of the type having a plurality of electric heating elements disposed in a casing defining a vertical air flow path having a lower air inlet and an upper air outlet includes the placement of a temperature sensing device in a vertical air channel located adjacent and external to the casing. The vertical air flow channel communicates with the vertical air flow path intermediate the inlet and outlet via an aperture in the casing wall. A flow duct is provided in the casing below the aperture for preventing, during normal operation of the heater, heated air from the interior of the casing from reaching the sensing device in the air channel. If the outlet of the flow path is obstructed, a portion of the hot air will travel from the casing through the aperture to the sensing device to activate the sensing device to deenergize the heating elements.
234420
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