| 摘要 |
A space heater having two heating elements and a motor/fan combination for circulating air over the heating elements to supply heated air to an environment includes a system for controlling the operation of the heating elements and the motor in response to heating requirements of the environment. The control system includes a first circuit for sensing temperature to determine a heating requirement to maintain a desired ambient temperature of the environment, a second circuit for independently activating and deactivating the heating elements in according with the heating requirements determined by the first circuit, and a third circuit for activating, deactivating, and variably controlling the volume of air circulated by the motor/fan in accordance with heating requirements determined by the first circuit. The heater housing includes a main housing portion housing the heating elements, an ambient air intake opening, a heated air exhaust vent, and the motor/fan. A secondary housing portion is mounted exterior the main housing portion so that ambient air is drawn around the secondary housing portion into the main housing portion to maintain the secondary housing at substantially ambient temperature. A temperature-sensing device is mounted in heat transfer relation to the secondary housing portion for sensing ambient temperature of the environment being heated.
|
