Firma Fritz Eichenauer

Fritz Eichenauer Gmbh & Co. Kg

Klaus Meywald

Helmut Ohnmacht

Karl-Heinz Nauerth

An electric heater with insulating carrying parts and heating conductors carried by the carrying parts and with at least one tap for tapping a voltage reduced compared with the voltage at the heating conductor. The carrying parts have slots through which pass feet of a tap and through which the tap is fixed to with a carrying part, the length of the slots being greater than a width of the feet of the tap.

Heater with tap

A form of electrical heating device, which is particularly applicable to hair driers but may also be useful in fan heaters or other electrical heaters for gaseous or other fluid media, comprises an insulating support plate around which a resistance heating wire is helically coiled with neighbouring turns of the coil offset to achieve improved heat exchange to the medium flowing over it and while allowing the device to be produced inexpensively and in a simple and trouble-free manner. The centers of the respective groups of turns which are similarly offset may lie on parallel lines or lines which converge along the length of the device. There may be two such groups or more, four for example. The turns are located in suitably dimensioned slots in the edges of the support plate; the wire may be bent into meander or sinuous form, in which case it can be made to grip the support plate in the region of the slots. A second support plate may be provided, to form a cruciform support, in order to improve the stability of the heater winding, the slots in the second plate also being dimensioned to suit the positions of the turns.

Electrical heating device for fluid media

An electrical heating element for fluid media, more particularly for hot air appliances, comprising a support member of insulating material and at least two heating conductors which are made of resistance wire and which surround the support member, the heating conductors being wound as helical coils and supported on supporting edges of the support member, the coils being wound with radial spacing from one another. The heating conductors may comprise an outer coil consisting of a resistance wire of high specific power consumption and an inner coil consisting of a resistance wire of low specific power consumption. The support member may comprise a tubular body with ribs projecting radially at the periphery, said ribs forming the supporting edges. The outer ribs may be U-shaped extending from end to end of the tubular body and forming passages through which the turns of the inner coil pass. The ribs preferably comprise mica strips; various mounting means for such strips are described.

Electrical heating element for fluid media and method for producing same

In an electrical resistance heating element (1) comprising a heating conductor support (3) of insulating material and a heating conductor (4) of resistance wire wound in meander or sinuously coiled manner with loop ends or bights (6) and loop legs or runs (8), the loops of the heating conductor (4) being arranged substantially in a single plane, and the inner loop ends (6) which are directed towards the heating conductor support (3) being situated in the edge region of the heating conductor support (3), it is proposed according to the invention to construct the heating conductor support (3) as a flat plate, the flat plate to be situated substantially in the same plane as the loops of the heating conductor (4). It is also proposed that the outer loop ends or bights (5) remote from the heating conductor support (3) are to be self-supporting and not secured. Because of this arrangement a resistance heating element can be manufactured at relatively small expense from a small number of different components, with very considerable mechanisation. Such a resistance heating element is used more particularly for the heating of gaseous media in hot air appliances, such as hair dryers or the like.

Electrical resistance heating element

A heating element for a hair dryer, fan heater or other hot air appliance has heating-conductor support means comprising a length of tube in the interior of which an electronic control arrangement is placed. Where the said arrangement comprises a plate or circuit board this is arranged parallel to the longitudinal axis of the tube. A temperature sensor of the control arrangement is connected directly to the circuit board and projects out of the interior of the tube into the outflowing air flow, preferably from a prolongation of the circuit board which extends beyond the end of the tube. The heating conductor consist of two conductors designed for low power and high power consumption respectively.

Electrical hot air appliance

A heating element (for a hair dryer, fan heater or other electrical appliance) in which the turns of resistance heating wire are held in place, in edge recesses of support plate means, by a strip of heat-resistant cement applied to the supporting edges and over the turns of the wire. The cement is non-wetting with respect to the heating wire.

Electrical heating element for fluid media

A heating element for electrical appliances which include a meander-form winding of resistance heating wire, two or more supporting plates arranged parallel to an incident flow direction of air produced by the blower and having openings in which turns of the winding are located. Metallic spacer elements are provided for connecting the supporting plates with a voltage tap being provided on at least one of the turns of the winding. At least one of the spacer elements is provided with a prolongation which projects beyond one of the supporting plates and is deformable to constitute a sleeve engaging about a turn of the winding.

Heating element for electrical appliance having a blower

A heating element comprises a resistance heating wire formed with closely adjacent zigzag loops and wound helically on an insulating plate or a pair of such plates mounted crosswise and possibly narrowing conically towards one end. Opposite loops engage the respective edges of such insulating plate, possibly in notches in those edges, and may be pressed on to those edges. The plate may have holes near its edges, the engaging loops being formed with kinks which clip into the holes. Spring clips may be provided for electrical connections to such loops at the edge of such plate and may also be formed with kinks which clip into the said kinks of the loops. The electrical connection to such spring clip may be a cable rivetted, eyeletted or soldered to a cross-piece interconnecting the legs of the clip or may comprise an angled tongue formed at the end of one of the legs to receive a flat plug-in connector. A temperature regulating device may be located within the helical winding and may be readily connected to the heating element by means of such connectors.

Electrical heating element comprising a helix of wire wound on at least

A heating element for an electrical appliance having a blower (e.g. a fan heater or a hair drier) comprises a wire looped in linear formation (e.g. zig-zag or sinuous) the loops being held in position by support plates so that there are at least two loop rows transverse to the air flow direction and disposed in succession in that direction and so that the loops in one of those rows are placed opposite to gaps in the other. In an element having four loop rows with a center taping for two-stage power control the electrical connections are disposed on only one support plate with the center tapping connection at the same side of the plate as the means supply connections; also, the loops in a first pair of rows are aligned with one another and are offset from the loops in the second pair which are also aligned with one another.

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Kandel, Germany

Klaus Meywald