초록 ▼

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. Th

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.

대표청구항 ▼

An air temperature conditioning device, comprising first and second conditioning elements, means for circulating air past the conditioning elements to condition it and supply conditioned air to an environment, and circuit means for controlling the conditioning elements, the circuit means including a

An air temperature conditioning device, comprising first and second conditioning elements, means for circulating air past the conditioning elements to condition it and supply conditioned air to an environment, and circuit means for controlling the conditioning elements, the circuit means including a temperature sensitive device for sensing ambient temperatures, means for selecting a desired ambient temperature to be generally maintained by the conditioning device, first means for comparing the sensed ambient temperature to the selected desired temperature and for causing the first conditioning element to operate when a first difference is detected between a sensed ambient temperature and the selected desired temperature, and second means for comparing sensed ambient temperature to the selected desired temperature for causing the second conditioning element to operate when a second difference is detected between sensed ambient temperature and the selected desired temperature.