JPH0449837Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a ring-shaped infrared heating element for uniformly heating a disc-shaped object to be heated, which is used as a heat source for various industrial heaters, dryers, etc. It's about shape.

(Prior art) As shown in Fig. 5, conventionally used disk-shaped objects to be heated are made by arranging a plurality of straight infrared lamps that match the maximum diameter of the object to create a disk-shaped temperature distribution. A method is used to heat the object uniformly, but there is a lot of electricity loss because unnecessary parts are heated.Also, as a way to reduce the loss, a method of heating the object that is heated is different in size to match the size of the disc-shaped object to be heated. Several types of straight tube infrared lamps are required, but the installation position and product management become complicated, which naturally increases manufacturing costs. Also, as shown in Figure 6, by heating the circle-shaped infrared lamp from the top surface of the disk, the temperature distribution becomes fairly uniform, but due to the manufacturing process of the circle-type infrared lamp, some non-heat generating parts (Figure 6A) are created. Naturally, there is a temperature difference between the non-heat generating part and the heat generating part. In either method, a reflective shade or the like is used to provide a large amount of infrared radiation energy to the object to be heated, thereby uniformly heating the disk-shaped temperature distribution. Incidentally, in order to make the temperature distribution of the heated object uniform, the distance between the heating element and the heated object is set long. Methods such as effective use of reflective shades have been taken, but increasing the lighting distance as described above not only requires a large-scale equipment, but also lowers the temperature of the heated object, which naturally takes time and requires a higher temperature. In this case, electricity will also be required, which will lead to a return to the era of energy conservation. Also, although reflective shade can be used as a matter of course, it is difficult to supplement the non-heat generating parts.

(Purpose of the invention) The invention solves these problems mentioned above. It was completed with the aim of creating a ring-shaped infrared heating element that can effectively utilize heat capacity and is easy to manufacture because the diameter of the ring can be freely designed to match the size of the disc-shaped object to be heated.

(Structure of the invention) The ring-shaped infrared heating element of the invention is characterized by having a heating element on the entire circumference of the ring in order to eliminate non-heated parts.

Next, one embodiment of the present invention will be described in detail as shown in the drawings. As shown in FIGS. The branch pipes 9 for welding the airtight sealing parts 4 and 4' to the openings having a diameter into which the coil filaments 2 and 2' can be inserted are welded at symmetrical positions above the center line. One coil filament formed to be located at the center of the tube by the plurality of anchors 3 in the ring-shaped valve 1 provided in FIG. 2 or in the direction perpendicular to the center line in FIG. 3, or the same standard. Two coil filaments having a 2 is electrically connected to the internal lead wire 6 of the hermetic sealing part 4, and the other end is electrically connected to the internal lead wire 6 of the hermetic sealing part 4' arranged at a symmetrical position. be done. The tip of the other coil filament 2' is electrically connected to the internal lead wire 5 of the hermetically sealed part 4.
The other ends are electrically connected to internal lead wires 5 of hermetically sealed portions 4' arranged at symmetrical positions.

The internal lead wires 5 and 6 are arranged in opposite directions,
The coil filament 2 is electrically connected to the internal lead wire 6, and the coil filament 2' is also electrically connected, so that the coil filament can easily avoid double contact. It is possible to eliminate non-heat generating parts.

In addition, when inserting one coil filament, in order to equalize the temperature of the coil filament, half the length of the coil filament is electrically connected to the internal lead wires of the hermetic sealing parts 13 and 4. As shown in Fig. 4, both ends of the ring-shaped coil filament are electrically connected to the two internal lead wires 5 and 6 without contacting each other, and the hermetic sealing portion is connected to the respective branch pipes. 9, a heating element having a uniform temperature around the entire circumference can be easily manufactured using conventional light bulb manufacturing methods.

The ring-shaped infrared heating element formed in this way is
Compared to conventionally used heating elements, the ring has a heating element on the entire surface, so the irradiation distance can be shortened, the mounting device is smaller and simpler, and the ring can be adapted to the size of the disk-shaped object to be heated. The diameter can be freely designed. Furthermore, if necessary, by attaching one or more rings with different diameters in a flat manner, a uniform temperature distribution can be obtained over the entire disk shape, which is of great practical value.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway plan view showing an embodiment of the present invention, Fig. 2 is a partially cutaway side view taken along line X-X in Fig. 1, and Fig. 3 is a partially cutaway side view showing another embodiment of the present invention. FIG. 4 is a partially enlarged cutaway plan view of a main part, FIG. 5 is a plan view showing an embodiment of a conventional straight tube infrared lamp, and FIG. 6 is a plan view of a conventional straight tube type infrared lamp. FIG. 2 is a plan view showing an example of a circle-type infrared lamp according to the present invention. 1... Heat-resistant ring valve, 2 and 2'... Coil filament, 3... Anchor, 4, 4'...
An airtight sealing part having two internal and two external lead wires, 5...internal lead wire, 6...other internal lead wire, 7...external lead wire (connected to 5), 8... ... External lead wire (connected to 6), 9 ... Branch pipe (opening for inserting the coil and welding the airtight sealing part), 10 ... Disc-shaped object to be heated,
11... Straight tube type infrared lamp, 12... Circle type infrared lamp, 13... Hermetically sealed portion having one internal and external lead wire.

Claims (1)

[Claims for Utility Model Registration] 1. A coil filament is disposed on the entire circumference along the axial direction of the tube inside a ring-shaped heat-resistant bulb, and hermetically sealed at symmetrical positions with respect to the center point of the ring. A ring-shaped infrared heating element characterized by having a coil filament in parts 4 and 4' or in the entire ring provided with a power terminal part. 2. The ring-shaped infrared heating element according to claim 1, wherein the heat-resistant bulb is made of ceramics such as quartz glass or crystallized glass. 3 The heating element of an infrared lamp is a tungsten coil filament, molybdenum coil filament, etc., filled with inert gas or halogen gas, etc., and is completely hermetically sealed, or the heating element of an infrared heater is a nickel-chromium or iron-chromium type. A ring-shaped infrared heating element according to claim 1 or 2, which is formed of a spirally wound electrical resistor.