JPH0527829Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> This invention relates to an infrared heater, and more specifically, to an infrared heater configured to selectively emit infrared rays of different wavelengths.

<Prior Art> Generally, an infrared heater 11 is constructed by surrounding a current-carrying body 12 made of a nichrome wire or the like that generates heat when energized with a ceramic block 13 that emits infrared rays when heated, as shown in FIG. (For example, please refer to Japanese Patent Application Laid-open No. 176316/1983).

<Problems to be solved by the invention> However, this infrared heater consists of a single ceramic block, and the wavelength of the infrared rays emitted is limited to a uniform range.

This idea takes into consideration the points mentioned above, as well as the fact that the optimal wavelength is different for each object to be heated (e.g., meat and fish), and the way the fish is grilled (e.g., heating the inside or browning only the surface). Focusing on the fact that there is an optimal wavelength for each heating object and heating method, it is an object of the present invention to provide an infrared heater that selectively emits infrared rays at an appropriate wavelength depending on the heating object, heating method, etc.

<Means for solving the problem> In order to solve this problem, the infrared heater of this invention has a plurality of current-carrying layers that emit infrared rays when energized are formed in parallel on an insulating substrate surface, and these current-carrying layers It is characterized in that the layers are selectively energized so that infrared rays of different wavelengths are selectively emitted.

Another infrared heater of this invention has a plurality of current-carrying layers that generate heat when energized, formed in parallel on an insulating substrate surface, and each of these current-carrying layers has a ceramic layer that emits infrared rays of different wavelengths. The present invention is characterized in that the plurality of current-carrying body layers are coated and selectively energized so that infrared rays having different wavelengths are selectively radiated.

<Example> Hereinafter, an example of this invention will be described with reference to the drawings.

FIGS. 1A and 1B show a first embodiment, and FIGS. 2 and 3 show other embodiments. In addition, each Example is a heater that mainly emits far infrared rays used in a commercial fish fryer.

The infrared heater 1 of the first embodiment shown in FIGS. 1A and 1B consists of a heater main body 1A and a control section 1B.

The heater body 1A has a flat plate shape as a whole (although it may have a curved shape), and is formed by attaching an insulating layer 3 made of ceramics to a base 2 made of an iron plate or the like by thermal spraying or the like. On the surface of this insulator layer 3, there are a plurality of current-carrying layers (for example, layers made of iron sand or silicon carbide) 4A, 4B, 4C, 4D, 4E, and 4F (six in the example) that emit infrared rays when energized. ) They are formed in parallel by plasma spraying or the like. Each current carrying body layer 4A, 4B, 4
One ends of C, 4D, 4E and 4F are electrically connected to each other, and the other ends are connected to lead wires 5A and 5 in the control section 1B.
It is taken in via B, 5C, 5D, 5E, and 5F.

In the control section 1B, a parallel circuit is formed between the current carrying layers 4A and 4D, and a parallel circuit between 4B and 4E and a parallel circuit between 4C and 4F are also formed. Each of these three parallel circuits has resistors 6A, 6B, and 6C with different electrical resistances.
are connected in series to create a difference in the amount of electricity that flows when energized, thereby making the current-carrying layers 4A, 4B, 4C,
The heat generation temperatures of 4D, 4E, and 4F are made different so that infrared rays of different wavelengths are emitted. In addition,
This is based on the experience that the wavelength of the emitted infrared rays differs depending on the temperature of the heat generated.

The control unit 1B is also provided with a manual or automatic switch 7, which selects a current-carrying layer to generate heat from among the current-carrying layers 4A, 4B, 4C, 4D, 4E, and 4F. Only the selected current carrying body layer can be energized.

In this way, a plurality of current-carrying layers that emit infrared rays when generating heat are formed in parallel on the insulating substrate surface, and a difference occurs in the amount of current flowing through each current-carrying layer.
Furthermore, since electricity is selectively applied to each current-carrying body layer, the temperature at which the heat is generated can be selected, and the wavelength of the infrared rays emitted can be selected.

Infrared heater 1 of the second embodiment shown in FIG.
The insulator layer 3 is provided with a protrusion 3A and a recess 3B, and the recess 3B is provided with current carrying layers 4A, 4B, 4.
C, 4D, 4E, and 4F are formed, and the other structure is the same as that of the first embodiment.

This second embodiment has the effect of improving the insulation between adjacent current carrying layers.

The infrared heater 1 of the third embodiment, whose main parts are shown enlarged in FIG. 3, has the following features in the heater main body 1A:
The current-carrying layers 4A, 4B, 4C, 4D, 4E, and 4F themselves do not have the function of emitting infrared rays, but each of these current-carrying layers 4A, 4B, 4C, 4D, 4E, and 4F emits infrared rays of different wavelengths. Ceramic layers 8A, 8B, 8C, 8D, 8E, 8F are coated by thermal spraying or the like, while in the control section 1B, resistors 6A, 6B, 6 are coated, although not shown.
C is not blanked out, and the other configurations are the same as in the first embodiment.

Therefore, current carrying body layers 4A, 4B, 4C, 4D, 4
When electricity is selectively applied to E and 4F and the energized current-carrying layer generates heat, the ceramic layer covering the current-carrying layer is heated and infrared rays of a specific wavelength are emitted.

Therefore, also in the third embodiment, infrared rays of a desired wavelength can be selectively emitted.

<Operations and effects of the invention> As explained above, this invention is configured to selectively emit infrared rays of different wavelengths,
A single heater can perform good heating according to multiple heating targets, heating methods, etc.

[Brief explanation of the drawing]

Figures 1A and 1B show the first embodiment of this invention.
Figure 1A is its overall configuration, Figure 1B is a side sectional view of the heater main body (taken along line B-B in Figure 1A), and Figures 2 and 3 are main parts of other embodiments. The sectional view, FIG. 4, is a configuration diagram of a conventional example. 1... Infrared heater, 3... Insulator layer forming an insulating substrate surface, 4A to 4F... Current carrying layer, 8A
~8F...Ceramics layer.

Claims (1)

[Claims for Utility Model Registration] 1. A method in which a plurality of current-carrying layers that emit infrared rays when energized are formed in parallel on an insulating substrate surface, and these current-carrying layers are selectively energized to emit infrared rays of different wavelengths. An infrared heater characterized by being configured to emit radiation selectively. 2. A plurality of current-carrying layers that generate heat when energized are formed in parallel on an insulating substrate surface, each of these current-carrying layers is coated with a ceramic layer that emits infrared rays of different wavelengths, and the plurality of current-carrying layers are An infrared heater characterized in that it is configured to selectively energize and emit infrared rays of different wavelengths selectively.