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Radiant electric heater

A radiant electric heater (2) comprises a base (8) of insulation material having a surface supporting at least one electric heating ribbon element (10) supported on edge. A rod-like temperature-responsive device (16) extends lengthwise partly across the heater (2) from an edge and over the at least one electric heating element (10). The surface of the base (8) is provided with an elongate recess (22) with sloping sides (24, 26) extending beneath and along the length of the temperature-responsive device (16). The ribbon (10) is supported in and traversing the elongate recess (22) such that an upper edge (28) of the ribbon (10) substantially follows a contour of the surface of the recess. The upper edge (28) of the ribbon (10) at a region (30) underlying the temperature-responsive device (16) is provided at a predetermined distance from the temperature-responsive device (16) and is at a lower level relative to the upper edge (28) of the ribbon (10) at regions at either side of the elongate recess (22).

Portable electric heater

A portable electric heater possessing characteristics similar to a portable electric oil filled heater absent the use oil and its associated manufacturing and environmental problems. The device includes an electric heater, a rotatable plenum and an external housing providing space saving characteristics.

Identification of electric heater capacity

An electric heater is provided with an identifying resistor associated with a connection between the heater and a fan control. When the electric heater is connected to the control, the identifying resistor provides information with regard to the capacity of the particular electric heater that is being attached to the control. The control then utilizes this particular capacity to control both the electric heater and an associated fan motor.

SYSTEM FOR OUTPUT POWER CONTROL ON ELECTRIC HEATER DRIVE

Methods and systems are provided for controlling the output power to DC electric heater elements to reduce the input current ripple and to fine-tune the output power to meet the fine-tuning percentage requirement. In one embodiment, a method is performed for controlling output power to heater elements in an electric heater system. The process includes receiving a power request by the heater system, providing output power controls for each heater element, and determining a particular output power control based on output power controls provided for each heater element and the power requested. Further, the heater system selectively controls the output power to one or more of the heater elements to meet the power request.

Heat conductive tubular electric heater
Base for an electric heater and method of manufacture
Structure of electric heater
Identification of electric heater capacity


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