| 摘要 |
<p>PROBLEM TO BE SOLVED: To solve such a problem that, when a LO air purifying heater having a large capacity is started and stopped, a frequency of the generator is changed, and carbon is likely to be attached to a heater.SOLUTION: 1. Some heaters whose setting temperature is changed are normally turned ON, the capacity used at the time of starting and stopping is reduced and the generator has less influence. 2. Attachment of carbon is made less by increasing a heat transfer area of the heater. 3. By thermal conduction from heaters in a normal ON state using a copper wire, the heaters in a stop state are used as a heat source and the attachment of carbon is reduced by energy saving.</p> |
