FR2538986A1 - HEATING RADIATOR - Google Patents

Abstract

IT INCLUDES A HEATING FILAMENT 1 ENCLOSED IN A BULB 2 AND A REFLECTOR 6. BULB 2 AND REFLECTOR 6 ARE ENCLOSED IN ANOTHER BULB IN WHICH A VACUUM HAS BEEN DONE. HEATING, DRYING AND MELTING OF PRODUCTS.

Description

Heating radiator.

  The invention relates to a heating radiator comprising a heating filament arranged in an oblong, closed envelope, made of a material that is transparent to the radiation. Heating radiators are used.

  in very different forms for heating, for

  expensive, to melt and to perform other similar operations The calorific power ceded

  the radiator is concentrated on the product intended

  born to receive the radiation by metal reflectors If we operate the reflectors

  in the ambient air, they get dirty and corrode.

  This is why it has been proposed to deposit a

  This has the disadvantage that one can not choose the shape of the reflector independently of that of the bulb and that the metal of the reflector tends to react chemically on the constituent material. If the reflector, together with the heating filament, is placed inside the bulb, this causes difficulties, particularly for bulbs filled with halogen, since chemical reactions occur. The problems that arise for the reflector arise in the same way for metal grids arranged so as to surround the heating radiator so that, in the event of breakage of the lamp envelope, it is impossible to come into contact with one another.

  with no metal parts under tension.

  The invention relates to a heating radiator com-

  taking a metal reflector and / or a metal grid

  the metallic parts being arranged close to the heating filament and not subject to any chemical corrosion or

a similar phenomenon.

  According to the invention, the reflector and / or the protective grid is arranged, together with the radiator Adans, a bulb made of a material transparent to the radiation and in which a vacuum has been created or which is filled with an inert gas. in a safe way, any corrosion of the metal parts of the reflector and / or the protective grid

  It is also advantageous that the dissipation of the

  their convection lamp bulb is very small. Other purposes and advantages of the invention

  will come out of the description and drawings that

will follow in which:

  FIG. 1 is a certain embodiment

  that little schematized of a heating radiator according to the invention having a reflector, and

  FIG. 2 is a sectional view perpendicular to

  the longitudinal axis of a heated radiator

  fant with reflector and protective grille.

  The heating filament 1 made of tungsten or other high-melting metal is sealed, in a vacuum-tight manner, in a first bulb 2 or, in the case where the material is made of quartz glass, is crimped by means of molybdenum sheets 3 This first bulb can, after a vacuum,

  be filled with habitual substances for such

  diators, such as gas for lamps, halogens, etc. This first bulb is sealed> together with the reflector 6 and / or the protective grid 7, in a

  second bulb 4 or is crimped there by means of the sheets

  Sealing 5, 8 Vacuum in this second bulb or fill it with inert gas, and close it The reflector 6 does not need to be maintained by means of the seals 8, but can also be applied under tension prior to the inner wall of the bulb 4, while the grid

  protection must in any case be earthed.

  The profile of the reflector 6 may be circular,

  bolique or elliptical, the first bulb 2 not in front

  not necessarily be willing in the middle of the se-

bulb 4.

  According to another embodiment of the invention

  vention, the heating radiator can be arranged

  in such a way that the electrical connection does not

  at one of the ends of the bulb, the

  return of the electric current being effected by

intermediate of the reflector.

Claims (4)

  1 Heating radiator comprising a heating filament (1) enclosed in a first bulb (2) made of a material transparent to radiation and a reflector (6) and / or a protective grid (7),   characterized in that the first bulb (2) is   together with the metal reflector (6) and / or   with the protective grid (7) in a second am-   hen (4) which is made of a material transparent to   radiation and in which one has evacuated.   2 Heating radiator according to the claim   1, characterized in that the reflector (6) is applied under tension prior to the inner wall the outer bulb (4).   3 Heating radiator according to the claim   1, characterized in that the reflector (6) has a   elliptic or parabolic profile and the axis of the first   first bulb (2) coincides with the focal axis of the flector (6).   4 Heating radiator according to the claim   1, characterized in that the electrical connection   is carried out at one end and the return   electrical current is carried by the opposite end   of the inner bulb (1), via reflector (6).   Heating radiator according to Claim 1, characterized in that the protective grid (7) concentrically surrounds the inner bulb (1) and can be grounded.