DE1969200U - ELECTRIC LAMP. - Google Patents

Description

This. Current time 2428/67

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Company Gerhard Saalmann, Herford / Westphalia,

Schwarzenmoorstrasse 88

"Electric heater"

The innovation relates to an electric radiator as an infrared radiator or the like., With retracted in a heating tube Heating conductor and a return conductor connected to it and arranged within the heating pipe.

If such radiators with heating conductors and return conductors arranged in the heating pipe are already known, they have the large ones

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Disadvantage is that the heating conductor is pulled out from one another Helix, i.e. a helix with windings held at a distance from one another, to which the return conductor connects.

The temperature-related change in length of the heating coil lying loosely in the heating pipe leads in the long term to the fact that the coil turns gradually through the multiple expansion and contraction due to the alternating warming Push them together towards the end areas, so that a heating coil is created, the distance between the windings being larger in the middle area than is in the end areas. Heating coils changed in this way little in the middle area and in the end areas dissipates a lot of heat, which leads to poor utilization of the heat radiated into the room by a reflector. In addition, the heating coil is stressed and unevenly this reduces their service life.

In order to avoid the wandering of the spiral turns, one has the Heizwendeüj embedded in other known designs Despite their complex construction, these emitters work poorly. As a result of the return conductor movement, some heating coil windings are pulled out of the embedding, which then the _ ^

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Make length compensation. However, these turns are not able to withstand the stresses and strains when it is cold brittle heating conductor breaks.

The task of the innovation is to avoid such Deficiencies in creating a radiator with a heating conductor and return conductor arranged in a heating pipe, which is easy to do with Structure is permanent and even after a long time Use none for the even heat dissipation on the Emitter rod shows disadvantageous damage to the heating coil.

According to the innovation, in the case of an electric radiator, in particular Infrared heater with in a heating tube made of opaque Fused silica, quartz glass or the like. retracted heating conductor and return conductor the heating conductor is formed by a heating coil with adjacent turns.

In a preferred embodiment, the heating conductor is from a return conductor, which is preferably of a highly heat-resistant Isolation tube is surrounded.

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In such a radiator, the filament turns can Do not change the distance to each other, so that a uniform Heat is given off over the entire heating coil area. From there it is with the appropriate dimensioning of heating conductor and return conductor the temperature difference between The heating conductor and return conductor are small, both conductors show approximately the same length expansion in the axial direction, as a result of which Damage to the heating conductor can be avoided.

In the drawing, an embodiment of the innovation is shown; it shows a section through an electrical

Radiator in a schematic representation.

In the case of an electrical emitter Io, in particular an infrared emitter or the like. one is preferably in a channel 11 made of opaque quartz glass, other glass, ceramic or the like. manufactured, single-channel or multi-channel heating tube 12, a heating conductor (glow element) 13 is arranged.

The heating conductor 13 represents the electrical supply line and is via a current bridge 14 provided at the end connected to a return conductor 15. Heating conductors 13 and return conductors 15 preferably only protrude with terminal contacts 13a, 15a - which themselves are in sockets or the like bordering plugs are formed or corresponding connector plugs take up - out of the heating pipe12. The end faces of the heating pipe 12 can be kept open or by welding by means of an insulating compound 16 or the like. locked being. ; ■ - ■ "-

The heat conductor 13 by bordered with a certain lateral play ¹ and the heating tube 12 "is preferably of a aneinander- Kends :! with ^

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lying turns (see drawing) formed; created represents a tube through which the return conductor 15 passes. The preferably on the central longitudinal axis of the heating conductor 13 running return conductor 15 is at least in the area of the heating conductor 13 of an electrically insulating tube made of quartz, steatite or other substances such as highly heat-resistant plastic or the like. surround.

In the event of a heat-related change in length of the heating conductor - filament which can be fixed in the longitudinal direction - the Length compensation due to the axial limitation by adjacent j adjacent turns largely no longer in the longitudinal direction of the heating conductor, but in the transverse direction, d. H. within each coil turn in the heating conductor - diameter. The axial The change in length of the heating coil is therefore small and since the heating conductor 13 and return conductor 15 are matched to one another in terms of their dimensions and thus the temperature difference between the two parts is small, they advantageously lengthen in the same way Dimensions, which avoids damage to the heatsealing band due to stretching.

Since the heater according to the innovation Io dex) Heizleiterl3 and Return conductor 15 except for the

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send connection contacts IJa ₅ 15a protected against contact with metal parts or the human hand within the heating tube 12 or under insulating compound 16 or the like. short circuits or injuries are excluded.

It is part of the innovation to equip the heater with several heating conductors.

The spotlight according to the innovation is characterized by its simplicity in construction and assembly. A particular advantage is that the heat radiation also after prolonged use is the same everywhere due to the heating coil with adjacent turns.

Claims (5)

Protection claims 1. Electric radiators, especially infrared radiators with at least one in a heating tube made of opaque fused quartz, quartz glass or the like. retracted heating conductor and thus connected return conductor arranged within the heating pipe, characterized by a helical heating conductor with turns lying next to one another preferably over its entire length. 2. Electric radiator according to claim 1, characterized in that the return conductor passed through the heating conductor is. 3. Electric radiator according to claim 1 and 2, characterized in that that the return conductor at least in the area of the heating conductor by a heat-resistant insulating tube is surrounded. 4. Electric radiator according to claim 1 to 3, characterized in that that the connections of the heating conductor and return conductor are arranged on one side of the heating pipe. -9- 5. Electric radiator according to claims 1 to 4, there- characterized in that the heating pipe is closed on one side.