| 摘要 |
PURPOSE:To conduct easily a heating temperature of inside a chamber to a thermostat and reduce a differential temperature in a chamber and permit to set up a low temperature for a chamber inside by a method wherein a thermostat for controlling the temperature of the inside heating chamber within a set value is provided in an inlet side of a thermoduct. CONSTITUTION:In an air-heater system, a thermostat 8 for controlling a temperature in a heating chamber 1 to a predetermined value, utilizing an electric heater 2 on a switching on.off control basis, is provided in a thermoduct 21, the air inlet 22 of the thermoduct 21 is opened to a high temperature zone in the heating chamber 1, while the outlet 23 of the thermoduct 21 is opened to the internal side of the heating chamber 1, thereby air in the thermoduct 21 of the inside chamber 1 is formed a ventilating mean 24 of a natural draft, entering air from the inlet 22 to the outlet 23 of the thermoduct 21 generating a natural convection stream. Accordingly, the temperature in the chamber is easily conductive to the detecting unit 8a of the oil type thermostat 8, therefore, a differential temperature in the chamber is reduced. |
