JPS6240551Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of an infrared heating device used as a heat source for various industrial heaters, driers, heaters, etc.

(Prior art) Conventional infrared heating devices that use a metal resistance heating element as a heat source consist of a plate-shaped infrared heater bolted to a reflective shade through an insulating cushioning material such as a mica plate, but this method has poor seismic strength. Fixed parts may be damaged during transportation, or cracks may occur when bolts are tightened.Furthermore, as the heater size increases and the operating temperature increases, the elongation due to thermal expansion increases, resulting in damage to fixed parts during use. There were problems such as.

(Purpose of the invention) This invention was completed with the aim of solving the above-mentioned problems and creating a highly safe infrared heating device that has excellent seismic strength and prevents damage to the fixed part due to tightening force and thermal expansion. It is what was done.

(Structure of the invention) The present invention includes a plate-shaped infrared heater in which a metal resistance heating element is embedded in a ceramic plate body, and a holding part formed on the edge of the plate-shaped infrared heater is provided in the reflection shade. The reflective shade is characterized in that it is mounted between a supporting member and an elastic supporting member protruding from the inner surface of the reflective shade.

Next, to explain the present invention in detail with reference to the illustrated embodiments, in Figs. It is a ceramic plate with an excellent wall thickness of about 2 mm, and the ceramic plate 1 has meandering grooves 3a and 3b with approximately equal thickness except for both ends 2 on the radiant side 4 and the non-radiant side. It is formed on the side 5. 6 is a coiled nichrome wire or the like buried in the groove 3b on the non-radiation side 5 with a heat-resistant filler 7 made of a colloidal silica-based burying material and a sodium silicate-based or aluminum phosphate-based adhesive. It is a metal resistance heating element, the terminal thereof is connected to a lead wire 8 protruding to the side of the ceramic plate 1, and the above ceramic plate 1 and the metal resistance heating element 6 constitute a plate-shaped infrared heater 10, At both end edges of the plate-shaped infrared heater 10, flat holding portions 9 which are slightly recessed over a required width are formed. Reference numeral 11 is a reflective shade for reflecting infrared rays from the non-radiating surface side 5 of the plate-shaped infrared heater 10, and is made of a material with excellent corrosion resistance, heat resistance, and infrared reflectance such as a stainless steel plate or an aluminized steel plate. An upper elastic support member 12 and a corresponding support member 13 are protruded from the inner surfaces of both ends of the elastic support member 12 to face each other. The elastic support member 12 is made by bending an elastic material with excellent corrosion resistance and heat resistance, such as a stainless steel plate, and has a flat part with a width corresponding to the width of the holding part 9 of the plate-shaped infrared heater 10. The shaped infrared heater 10 is mounted and fixed on the inner surface of the reflective shade 11 by having the lower surface of the holding portion 9 supported by a support member 13 and sandwiched between the support member 13 and the elastic support member 12. It is more preferable that the support member 13 is also made of the same material as the elastic support member 12 and given elasticity, and the lower support member 13 is effectively exposed to infrared rays from the non-radiation surface side of the plate-shaped infrared heater 10. The plate-shaped infrared heater 10 and the reflective shade 11 have a stepped structure that can form a gap between the plate-shaped infrared heater 10 and the reflective shade 11 to the extent that the infrared rays are reflected.

In this structure, a metal resistance heating element 6 is embedded in the ceramic plate 1 through a lead wire 8.
When energized, infrared rays are radiated from the radiation surface side 4 and the reflective shade 11 of the plate-shaped infrared heater 10, and the plate-shaped infrared heater 10 reflects both sides of the holding part 9 formed at its end. Since it is attached to the reflective shade 11 by being sandwiched between a support member 13 provided inside the shade 11 and an elastic support member 12 protruding from the inner surface of the reflective shade 11, thermal expansion occurs due to temperature rise. Even if the plate-shaped infrared heater 10 is heated, the end portion of the plate-shaped infrared heater 10 will not be prevented from expanding, and the fixed portion of the heater will not be damaged due to thermal expansion. Moreover, since the plate-shaped infrared heater 10 is fixed under the elasticity of the elastic support member 12 with a gap between it and the reflective shade 11, it has excellent seismic strength, so that the fixed part may not be damaged during transportation. No cracking occurs during installation. Next, the second embodiment shown in FIG. 4 and the third embodiment shown in FIG.
The holding part 9 of 0 is inserted into the engagement hole 1 such as a through hole or a blind hole.
5, and an elastic support member 12 and a support member 13 are attached at positions corresponding to the engagement holes 15.
In this case, a protrusion 16 and a protrusion 18 having a diameter smaller than that of the engagement hole 15 that engage with the engagement hole 15 are press-molded, and in this case, a flat part must be provided at the end of the heater. It can absorb the elongation due to the thermal expansion of the heater. Heat-resistant cushioning materials 17 and 1 such as mica are provided on the surfaces of the elastic support member 12 and the support member 13 that are in contact with the holding portion 9 of the plate-shaped infrared heater 10.
If 9 is attached, the safety of holding will be further improved. Next, in a fourth embodiment shown in FIG. 6, the support member 13 is formed as a flat plate made of a flexible and heat-resistant material such as inorganic fibers that is in close contact with the entire non-radiation surface side of the plate-shaped infrared heater 10. Although the heat insulating effect and seismic strength are further improved, when the supporting member 13 is made of a flat plate having flexibility and heat resistance, a fifth embodiment shown in FIG. 7 is used. Alternatively, it may be provided only in the portion of the plate-shaped infrared heater 10 that is in contact with the holding portion 9. Furthermore, although the above embodiments are all related to infrared heating devices in which the plate-shaped infrared heater 10 is a single unit, the elastic support member 1
2 and the support member 13 have a double-sided structure as in the sixth embodiment shown in FIG.
0 can be arranged in multiple rows in all directions, it is possible to provide an infrared heating device with excellent earthquake resistance and a wide radiation area. Further, as in the seventh embodiment shown in FIG. 9, a large number of plate-shaped infrared heaters 10 are placed in a metal case 21 provided with locking protrusions 20 on both sides and the rear end, and a cushioning material 22 is placed between them. An infrared heating device can also be obtained by inserting the infrared rays in an interposed manner and sandwiching only the front end thereof between the elastic support member 12 and the support member 13. Note that the shape of the plate-shaped infrared heater 10 is not limited to a rectangular shape.

(Effects of the invention) As is clear from the above explanation, the invention has excellent seismic strength, can absorb elongation due to thermal expansion of the plate-shaped infrared heater, and has no risk of damage due to tightening force. It is a highly safe infrared heating device with various advantages such as, and has extremely great practical value as it solves the problems of conventional infrared heating devices of this type.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a partially cutaway plan view showing the first embodiment, FIG. 2 is a partially cutaway front view, and FIG. 3 is a partially cutaway side view. , FIG. 4 is a partially cutaway front view showing the second embodiment, FIG. 5 is a partially cutaway front view showing the third embodiment, and FIG. 6 is a partially cutaway front view showing the fourth embodiment. 7 is a partially cutaway front view showing the fifth embodiment, FIG. 8 is a partially cutaway front view showing the sixth embodiment, and FIG. 9 is a partially cutaway front view showing the seventh embodiment. FIG. 1: ceramic plate body, 6: metal resistance heating element, 9: holding part, 10: plate-shaped infrared heater, 11: reflective shade,
12: Elastic support member, 13: Support member, 15: Engagement hole, 16: Projection, 17: Heat-resistant buffer material.

Claims (1)

[Claims for Utility Model Registration] 1. A plate-shaped infrared heater 10 in which a metal resistance heating element 6 is installed on a ceramic plate 1 is placed inside a reflective shade 11, and a holding part 9 is formed at the edge of the plate-shaped infrared heater 10.
An infrared heating device characterized in that the infrared heating device is mounted between a support member 13 provided within the reflective shade 11 and an elastic support member 12 protruding from the inner surface of the reflective shade 11. 2. Infrared heating according to claim 1, in which the holding part 9 is provided with an engagement hole 15 and the elastic support member 12 is provided with a protrusion 16 that engages with the engagement hole 15. Device. 3. The infrared heating device according to claim 1 or 2, wherein the elastic support member 12 has a heat-resistant buffer material 17 attached to its inner surface. 4 Utility model registration claim 1, 2, or 3 in which the support member 13 has a step that can form a gap between the plate-shaped infrared heater 10 and the reflective shade 11 Infrared heating device.