JPS6059688A - Heat generator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a heating element.

Conventional Structures and Problems Conventionally, heating elements used in electric heaters and the like have been constructed by sealing a tungsten filament together with argon gas in a transparent tube.

Although this heating element has good heating properties, it has high brightness and is very dazzling, making it uncomfortable for users. In addition, it emits the maximum radiant energy at the wavelength I''i of 1.1 μm, which is the wavelength that least penetrates the skin, but since most of it is reflected by clothing, the absorption efficiency is poor, and the thermal efficiency is poor overall. 0 Purpose of the Invention Therefore, in view of the above-mentioned drawbacks, the present invention has developed a method that eliminates glare and has a medical effect at a wavelength of 1 to 1.2 μm that penetrates the skin.
The purpose of this invention is to provide a heating element with high heating effect that emits far-infrared rays of around 10 μm that are well absorbed by clothing. Structure of the invention and to achieve this purpose In the present invention, a thermally highly emissive material layer is formed on the surface of the transparent tube.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described above with reference to the drawings. In Figure 1, 3←1. An example of a transparent tube used is a meteorite capsule made of glass, 4I1, and maintained at a temperature of 2400℃ with a tungsten filament. 5 is airtightly sealed from the outside air with molybdenum foil. 2 is a tantalum plate that holds tungsten filaments 1 and 4 in the center of quartz glass v3. fj: Argon gas is sealed in the quartz glass tube 3 at a pressure of 450 mmHg. Reference numeral 6 denotes a lead-in wire for supplying current to the tungsten filament 4 from the outside. Reference numeral 1 denotes a high thermal radiation material layer in which A1203TiO2 is sprayed onto the surface of the quartz tube 3 to a thickness of 10 μm by plasma spraying.

The operation of the heating element configured as above will be described below.

When the tungsten filament 4 is energized, the quartz glass tube 3 is heated to about 600°C by the radiant heat from the filament 4, and the high-emission heat layer 1 is also heated to the same temperature, so it emits strong radiation at wavelengths in the far-infrared region. be done. filament 4
emits a near-infrared wavelength with a maximum energy of 1.1 μm at a temperature of 2400°C, and at the same time emits a large amount of visible light, but when it passes through the plasma-sprayed thermal high radiation material layer 1, it is attenuated and the glare is reduced. Reduced.

As described above, by providing the high thermal emissivity material layer 1 on the surface of the quartz glass tube 3, a reduction in brightness of 20% was achieved. If it is desired to further reduce the brightness, the thickness of N1 may be increased. 1. Looking at the spectral energy intensity of a heating element in which a high thermal emissivity material layer 4 of A1203T102 was plasma sprayed onto a quartz glass tube 3, it was found that the radiation in the far infrared region was increased as shown in FIG. 2B. In Fig. 2, A is a conventional heating element.Effects of the InventionThe present invention reduces the noise by providing a heat-emitting layer on the surface of the transparent tube, and it can be used in the near-infrared to far-infrared region. It is possible to strengthen the energy radiation and increase the heating effect. In other words, it has a medical effect that easily penetrates the skin.
, a heating device that can intensify the radiation of near-infrared wavelengths of 1 μm and far-infrared wavelengths of around 10 μm that are easily absorbed by clothing, has excellent heating properties, and does not cause discomfort due to stiffness. This is extremely advantageous in practical terms because it can provide a heating element.

In addition, in the example, A1203 was used as the material of the thermal high radiation material layer.
Although T i O2 is used, similar effects can be obtained by using zirconia-based, titania-based, or alumina-based ceramics or Nox.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a heating element according to an embodiment of the present invention, and FIG. 2 is a spectral energy radiation intensity characteristic diagram of the heating element. 1... High heat radiation material layer, 3... Quartz glass tube (transparent tube), 4... Tungsten filament (filament).

Claims (1)

[Claims] A heating element in which a highly emissive material layer is formed on the surface of a transparent tube, and a filament is sealed together with an inert gas inside the transparent tube.