FR2834775A1 - HEATING BODY FOR ELECTRIC RADIATOR - Google Patents

Abstract

The heating body (1) for an electric radiator is mounted in an elongate housing and has a covering (4,5) of high emissivity on each vertical phase. The covering is formed partially on each surface to provide a homogenous surface temperature on the surface of the corresponding casing.

Description

1 to 5.

1 2834775

  The invention relates to a chanter body for an electric radiator, of elongated conformation, intended to be contained in at least one envelope of elongated shape. French patent application FR 00 02220, not published, relates to an electric heating device of the type comprising at least one heating body of elongated shape contained in at least one envelope of elongated shape. In this device of known type, each envelope has a U-shaped profile with an upper edge and a lower edge and is closed by conformations with substantially vertical fins, so as to diffuse and homogenize the temperature of the

  o envelopes and the air contained in these envelopes over the entire height of the appliance.

  This known type of device is generally satisfactory and in particular makes it possible to limit the temperature of the external surfaces accessible to the touch to a value below 75 ° C., while allowing the use of a chanter body at a temperature markedly above 200 ° C. and obtaining effective natural convection. A known problem is to increase the heat exchange between the body of

heater and the front of the radiator.

  To solve this known problem, we have already used a heating film glued to the front of the radiator. But this additional provision requires

  o additional operations in manufacturing, which increases the price of the device.

  A first object of the invention is to obtain a surface temperature

  homogeneous on the front of the radiator casing, without using a heating film.

  Another object of the invention is to obtain homogeneous temperatures in

  limiting the side effects suffered by the heating body during its operation.

  Indeed, the heaters for electric radiators can be subject to overheating of the central part and to a temperature deficit on the edges of the fins.

of the chanter body.

  The subject of the invention is a heating body for an electric radiator, of elongated conformation, intended to be contained in at least one envelope of elongated shape, characterized in that the heating body comprises a coating with high emissivity on each vertical face, said coating being practiced partially, on

2 2834775

  each side so as to obtain a uniform surface temperature on the facade

of the envelope.

  According to other alternative characteristics of the invention: - the coating formed on the front face of the heating body has a U-shaped configuration. - the coating formed on the rear face of the heating body extends at least partially in the lower part of the rear face, -in an alternative embodiment, the coating practiced on the rear face of the heating body extends in ouke parallel to the lower part of the coating and o above the changeable tubular part, - the coating with high emissivity can be a non-glossy black paint resistant to the peak temperature reached by the chanter body, - the coating may be a coating obtained by black anodization, to deposit a metal or a metal oxide with high emissivity, the coating may be a coating obtained by plating a metal or

  high-emissivity metal oxide.

  The invention will be better understood thanks to the description which will follow given to

  by way of nonlimiting example in reference to the appended drawings in which: - Figure 1 schematically represents a front view of a chanter body

according to the invention.

  - Figure 2 schematically shows a rear view of the heater body

of figure 1.

  - Figure 3 shows schematically a front view of a second body

according to the invention.

  - Figure 4 shows schematically a rear view of the chanter body

in Figure 3.

  - Figure 5 shows schematically a front view of a third body

of chanffe according to the invention.

3 2834775

  - Figure 6 schematically shows a rear view of the heater body

in Figure 5.

  In reference to FIGS. 1 and 2, a first embodiment of the heating body according to the invention comprises an upper fin 1, a lower fin 2 and a central tubular part 3. The entire heating body is made of one

  holding by extrusion in an aluminum alloy.

  In FIG. 1, a covering 4 shown in hatched gray extends substantially in a U-shape with two lateral branches 4a, 4b and a lower branch 4c. The covering 4 extends over the periphery of the front face of the heating body, with the exception of the upper edge of the front face of the chanter body. The coating can be made in non-glossy black paint resistant to the peak temperature reached by the heating body, or by black anodization or by

  plating of a metal or a high-emissivity metal oxide.

  In FIG. 2, the rear face of the heating body has on its lower fin 1 a covering 5 extending along the lower edge of the rear face over a height of approximately 50 mm. The coating 5 produced on the rear face is carried out

  by the same process as the coating carried out on the front face.

  In reference to FIGS. 3 and 4, a second embodiment of the chanter body 10 according to the invention has an upper fin 11, a lower fin 12 and a tubular central part 13. The whole of the heating body is made of 'a

  integral by extrusion in an aluminum alloy.

  In FIG. 3, a covering 14 shown in hatched gray extends substantially in a U-shape with two lateral branches 14a, 14b and a lower branch 14c. The coating 14 extends over the periphery of the front face of the heating body, with the exception of the upper edge of the front face of the heating body. The coating 14 can be produced in non-glossy black paint resistant to the peak temperature reached by the chanter body, or by black anodization

  or by plating a metal or a metal oxide with high emissivity.

  In FIG. 4, the second embodiment 10 of the chanter body has a coating 15 partially extending over a horizontal segment 15a in the lower part of the lower fin 12, extending by a vertical segment and

4 2834775

  lateral 15b, and then extending by a U-shaped covering with two lateral branches lSc, 15d and a lower branch 15e extending above the fin

upper 12.

  The coating 1S produced thus has the shape shown in FIG. 4 on

s a width of approximately 50 mm.

  The lower branch 1 Se of the upper U-shaped configuration of the covering extends parallel to the lower part 15a of the covering and above the

changeable tubular part 13.

  In reference to FIGS. S and 6, a third embodiment 20 of the body of the chanter according to the invention has a lower fin 21, an upper fin 22, and a central tutular part 23. The entire chanter body is made a

  integral by extrusion in an aluminum alloy.

  In Figure S. a coating 24 shown in hatched gray extends substantially in a U-shape with two lateral branches 24a, 24b and a lower branch 24c. The coating 24 extends over the periphery of the front face of the heating body, with the exception of the upper edge of the front face of the heating body. The coating can be made in non-glossy black paint resistant to the peak temperature reached by the heating body, or by black anodization or

  by plating a metal or a metal oxide with high emissivity.

  In FIG. 6, the coating shown in hatched gray extends over a lower part of the lower fin 21, with the exception of an uncoated free zone. The width of the uncoated free zone is of the order of lSO mm, while the height of the coating 1 S is of the order of SO mm. The coating on the rear side is

  carried out by the same process as the coating carried out on the front face.

  Tests have shown the efficiency of the heating bodies according to the invention and the uniformity of the temperature obtained on the front of the corresponding electric radiator. The invention described in reference to several particular embodiments is in no way limited thereto, and on the contrary covers any modification of form and any

  variant in the context and spirit of the invention.

2834775

Claims (7)

  1. Heating body for electric radiator, of elongated conformation, intended to be contained in at least one envelope of elongated shape, characterized in that the chanter body comprises a coating with high emissivity on each vertical face, said coating being practiced partially (4, 5; 14, 1S; 24, 25) on each side so as to obtain a uniform surface temperature on the facade of the envelope.   2. Heating body according to claim 1, characterized in that the coating (4, 14, 24) formed on the front face of the heating body has a U-shaped conformation. 3. Heating element according to claim 1 or claim 2, characterized in that the coating (S. 1S, 25) formed on the rear face of the chanter body   extends at least partially into the lower part of the rear face.   4. Heating body according to claim 3, characterized in that the covering (15) formed on the rear face of the heating body extends parallel (lSe) to the lower part of the covering and above the tubular part heating (13).   5. Heating body according to any one of claims 1 to 4,   characterized in that the coating (4, 5; 14, 15; 24, 25) with high emissivity is a non-shiny black paint resistant to the peak temperature reached by the body heating.   6. Heating body according to any one of claims 1 to 4,   characterized in that the coating is a coating (4, 5; 14, 15; 24, 25) obtained by black anodization, for depositing a metal or a metal oxide with high emissivity.   7. Heating body according to any one of claims 1 to 4,   characterized in that the coating is a coating (4, 5, 14, 15; 24, 25) obtained