Electric resistance heating devices – Heating devices – Radiant heater
Patent
1990-10-09
1992-08-25
Reynolds, Bruce A.
Electric resistance heating devices
Heating devices
Radiant heater
392411, 219541, F26B 330, H05B 300, H05B 306, H05B 344
Patent
active
051426099
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a plug-in quartz infra-red radiator with a housing and, disposed therein, at least one heating element, with electrical connections, plug-in connections on the back of the housing and with a heat-resistant insulating holder for the heating element or heating elements in the housing.
Such a quartz infra-red radiator is known from DE-OS 36 19 919. In the case of the prior art quartz infra-red radiator, both mechanical and also electrical plug-in connections are disposed independently of one another on the back of the housing. It is true that the plug-in facility of the quartz infra-red radiator, when compared with the hitherto conventional complicated wiring arrangement, does already provide tremendous advantages, yet with the prior art plug-in quartz infra-red radiators the electrical connections of the heating elements are still in conventional manner led out of an insulating support for the heating elements to the plug-in contacts disposed on the back of the housing where they are connected to the associated part of a plug or of a socket. The electrical plug-in connection on the back of the housing must thereby, as a rule, provide a heat-resistant electrical insulation for the connection to the electrical connections of the heating elements and which, in accordance with conventional requirements in terms of heat resistance, insulating capacity and mechanical properties, constitutes the provision of a ceramic housing for the plug-in connection. The disposition and attachment of such a plug-in connection with a ceramic housing on the back of an infra-red radiator means additional expense when producing the quartz infra-red radiator which would otherwise have on the back purely a row of ceramic sleeve insulated connecting wires.
In contrast, the present invention is based on the problem of providing a plug-in quartz infra-red radiator having the features mentioned at the outset but which, when compared with the prior art plug-in quartz infra-red radiators, can be produced more easily and at a more competitive price.
SUMMARY OF THE INVENTION
This problem is resolved in that the heat-resistant insulating holder comprises a space to accommodate at least a part of a plug-in connection and at least one aperture for leading through a part of a plug-in connection which is not accommodated in the space and which preferably protrudes therefrom at the back of the housing.
Consequently, the function of a likewise heat-resistant holder which in any event is provided for the heating elements of the quartz infra-red radiator is advantageously combined with that of a holder for the plug-in connection so that a part of the plug-in connection is accommodated and supported in the space provided for it in the heating element holder, while another part of the plug-in connection extends from this space through the aperture which is likewise provided on the holder, emerging at the back of the housing so that this projecting part can be fitted together with a matching counterpart which is for example disposed on an assembly plate. However, it is also possible for a part of a plug-in connection to extend from the assembly plate in the direction of the infra-red radiator and which, when connected to the infra-red radiator, is pushed into the aperture so that a connection is established with the part of the plug-in connection which is housed in the space of the holder.
Certainly, an embodiment of the invention is preferred in which the projecting part of the plug-in connection and the part of the plug-in connection which is accommodated in the space of the holder are connected to each other in one piece.
In particular, an embodiment of the invention is preferred in which these plug-in connection parts form a flat plug which is angled over to an L-shape, of which the first leg is completely housed in the space in the holder which is provided for it while its second leg extends through the aperture in the holder, emerges at the back of the housing and can be plugged toget
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Hilscher Reinhard
Ullrich Christian
Jeffery John A.
Reynolds Bruce A.
TQS Thermal Quarz-Schmelze GmbH
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