| 摘要 |
<p>PURPOSE:To improve cooling effect, by making fin ventilation forcibly by a blower to be driven by a thermoelectric element. CONSTITUTION:When it comes to a state wherein a burner 1 is ignited and a flame 3 is formed at the top of the burner 1, a temperature at the top of a thermoelectric element 2 is raised and voltage corresponding to a temperature difference between a high temperature edge part and a low temperature edge part is generated on the thermoelectric element 2. When the generating voltage is becoming large along with a temperature rise of the thermoelectric element 2 and arrives at a certain value, a blower 10 begins to rotate and begins to suck low temperature air into an air duct 5 through an air suction port 9 on the back of a heater. The sucked low temperature air flows to a side duct 11 and is discharged indoors from a blow-off opening 13 by passing through a communicating opening 12 after heat exchange of the low temperature air with a cooling fin 4 has been made. As cooling of the fin 4 is done by a forced convection like this, a heat transmission ratio becomes large, and effective cooling is done, through which the temperature difference between the high and low temperature edge parts of the thermoelectric element 2 can be kept high and high generating voltage is obtained always.</p> |
