DE8324372U1 - HEATING ELEMENT WITH PTC RESISTANT BODY - Google Patents

Description

IIIII t I

Description!

The innovation relates to a heating element PTC resistor body between busbars.

Solehe ^ fe ^ z ^ enfAii ^ nd known to find use instead of the previously common heating coils, especially in hair treatment devices, such as electric heated hair curlers and the like. More. Here, the previous heating elements of this type were through a Resistance body made of a material with a positive temperature coefficient of the electr. Resistance formed, which is held between two busbars and then in an insulating plastic « sleeve is added. Here, on the one hand, the need for good electr. Isolation and on the other hand, sufficient temperature output as heating j

elements represent contradicting conditions, white ~ j before through the use of silicone-containing art |

sbofflsolation was attempted, but |

could not be solved optimally up to now. Here must the plastic jacket also provides the necessary contact pressure the busbars to the PTC resistor body j take over which function, however, increases with- | the heating decreases. 1

The innovation is now the task here a \

to enable an optimal solution with good heating performance with sufficient insulation. \

The heating element with PTC resistance body between busbars according to the innovation features see to this end, in that in the case of circular sections forming busbars with intermediate resistance bodies this package wrapped with insulating tape and in a metal slit for suspension ' sleeve is plugged in. This enables both good insulation and heating performance to be achieved, whereby the necessary contact pressure of the busbars to the PTC resistor through the slotted metal sleeve is effected, which is applied with appropriate preload. Here is the insulating tape provided with thermosetting adhesive and preferably in several layers around the package of power sheets * · lit intermediate resistance bodies narrow « wrapped and surrounds this protruding on both sides, whereby the slotted metal sleeve, esp. aluminum « The sleeve extends over the entire length of the polien and is preferably open on both sides.

Two embodiments of such heating elements according to the firing are for example in the drawing shown, namely show:

Figure 1 is an overall view of a heating element

partially cut open in a perspective view,

Figure 2 shows a cross section of this and

Figure 3 shows a cross section of a further embodiment.

As can be seen from the drawing according to FIGS. 1 and 2 the heating element consists of the two busbars 1 and 2 with an external PTC resistor 3, which heats up when the current passes through will. The power is supplied via the power connections a b, which on the one hand are caulked in the narrow longitudinal grooves 4.5 of the busbars 1.2. For wrapping this package 1 to 3, on the other hand, a U-shaped retaining spring 6 inserted into the grooves H, 5, which after the »rocking process can be seen again. Temperature-resistant insulating tape is used here with thermosetting glue wrapping the package 1 to 3, which for insulating purposes on both sides at 6 and 9 protrudes accordingly. After that, a slotted Metal sleeve 10, especially an aluminum sleeve pushed over, soft is open on both sides and corresponds to the length of the film. This slotted metal sleeve 11 serves on the one hand due to their resilience, the pressing together of the busbars 1 and 2 with the resistance body 3

2G and on the other hand the heat absorption and transfer as a heating element, the insulating film being kept relatively thin in one or more layers can be.

FIG. 3 then shows a further exemplary embodiment in which "two outer faces Busbars 1a, 1b of the same polarity and a middle busbar 2 of opposite polarity the resistance body 3a, 3b each receives between them. In this way, two resistance bodies can be created switch one after the other and increase the heating output.

SehlleÄlioh the conductor rails can also have a flat, wide longitudinal groove on the inside
Have a receptacle for the resistance body, as this is not particularly shown here and is able to serve to fix the position of the resistance body in a particular manner.

Claims (6)

•? ·! RAtEMTAMWALlT BAU PR, RUDOLF BAUER - DIPL.-ING. HELMUT HUBBUCH DIPL.-PHYS. ULRICH TWELMEIER WESTLICHE 29 31 IAM LEOPOIOPIAT / I D-7530 PFORZHEIM iwest germamv, «Ι0? 2 3Ί <O22SO / 7O TELEGRAMS PATMARK Τ · Ι · Χ 783 929 patma d 22 August 1983 II / Wa Firma JK Vertrieb Haarkosmetischer Produkte GmbH, Pforzheim heating element with PTC resistance body Protection claims: 1. Heating element with PTC resistance body between busbars, characterized in that dab in the case of busbars forming sections of a circle with intermediate resistance bodies this package wrapped with insulating tape and is inserted into a metal sleeve slotted for suspension. 2. Heating element according to claim 1, characterized in that the insulating film tape is provided with thermosetting adhesive and in one preferably several layers in the package made of busbars with intermediate resistance bodies tightly wrapped and overhanging on both sides. 3. Heating element according to claim 1 or 2, characterized in that the slotted It II II I
I · · · II Metal sleeve, especially the aluminum sleeve
extends the entire length of the film and is preferably open on both sides. 4. Heating element according to one of claims 1 to 3, characterized in that
with two external busbars of the same polarity and a middle busbar
opposite polarity, the resistance bodies are each interposed. 5. Heating element according to one of claims 1 to ¹ J, characterized by ch, that the external busbars each
in the center of the circular arc area have a narrow longitudinal groove for caulking the power connections on the one hand and attaching a U-shaped retaining spring for wrapping with insulating tape on the other hand.
20th 6. Heating element according to one of the preceding claims, characterized et, that the busbar has a flat, wide longitudinal groove on the inside for receiving the resistance body exhibit.