| 摘要 |
PURPOSE:To sense temp. in a place desired to be controlled by providing an operation switch box to a wall surface by projecting it from said surface, and sensing the temp. with the sensor in the box by utilizing the convection generated by the heat evolved in the internal electronic parts. CONSTITUTION:An operation switch box 10 is provided on a wall surface by projecting it from said surface, and a front panel 22 is fixed thereto. During conduction of electricity, air flow is moved upward by the heat possessed by electronic parts in a part frame 25, and the air flows of arrows A, B enter a body chamber 18 through a lower slit 14 on the body side, flow through the inside of said chamber and form the air flows going through an upper slit 11 on the body side, like arrows C, D. Guided by these air flows, the air flow enters a lower slit 16 on the sensor side like arrow E, contacts a sensor 20a projecting from a hole 20 while flowing, and generates the air flow flowing like an arrow F through an upper slit 13 on the sensor side; therefore, the temp. in the place desired to be controlled is sensed more effectively. |
