JPS584285A - Panel far infrared heater - 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 The present invention relates to a planar far-infrared heater that can easily perform uniform heating.

A far-infrared heater is a heater that uses infrared rays with a relatively long wavelength, that is, infrared rays with a wavelength of approximately 2 μ to 20 μ. Far-infrared rays in a relatively long line length region (hereinafter simply referred to as "infrared radiation") are widely used in heaters and dryers for organic materials because of their high absorption rate by organic materials. It became so.

Conventionally, in lamp-shaped or rod-shaped far-infrared heaters, a parabolic reflector (mirror) is placed behind the heat radiator in order to increase the utilization efficiency of infrared rays and to equalize the distribution of infrared irradiation60. It was used. However, since the irradiation density of lamp-shaped or rod-shaped infrared heaters is low, far-infrared heaters of flat X-shape and other planar shapes have come to be used to improve this problem.9.

However, the planar far-infrared heater KTh has the disadvantage that the heat dissipation surface is cooled by convection or the like during the flow of air, resulting in large heat loss and lower thermal efficiency than lamp-shaped or rod-shaped heaters. In addition, when the conical Totsu external wire heater is used as a dryer in the heater, the infrared irradiation intensity distribution is very different between the center and the ends, and the disadvantage is that it is difficult to use a uniform heater. was there.

The present invention can improve the above-mentioned drawbacks of conventional planar far-infrared heaters.

That is, the planar far-infrared heater of the present invention has a lattice-shaped reflecting plate made of an infrared reflective material and having nine or more lattice-shaped spaces mounted on the front surface of the heat-radiating surface of a planar heat radiator.

Since the planar far-infrared heater of the present invention is equipped with a lattice-shaped reflection plate inside the heat dissipation surface of the planar heat radiator, the heat dissipation surface will not be cooled by passing air or convection. Reduces heat loss and improves thermal efficiency. Further, since the infrared rays emitted obliquely from the heat dissipation surface are reflected and dispersed in each direction by the grid-like reflector, the irradiation intensity distribution can be easily made uniform, and the heating force can be uniformly applied.

Hereinafter, the present invention will be explained in further detail based on illustrated embodiments.

Referring to FIG. 7, which shows a refreshing embodiment of the present invention, the planar far-infrared heater H is shown in which a grid reflector 3 is attached to the front surface of the heat radiation surface λ of the planar heat radiator l. The reflective plate 3 has 73 lattice-like spaces, and when used in a dryer or the like in front of the heat dissipation surface, the heat dissipation surface is directly exposed to the flowing air and cooled. Since this is effectively prevented by the reflector 3, thermal efficiency can be improved. t
In addition, far infrared rays II (heat rays) emitted from the surface of the heat dissipation surface
Of these, the radiation emitted in the oblique direction is reflected by the lattice l1llWJ of the reflector plate 3 and is dispersed and emitted in each direction, so that the infrared irradiation distribution can be made uniform and heating etc. can be easily made uniform. .

The height of the reflecting plate 3 may be appropriately selected depending on the degree of passing airflow and convection, the degree of uniformity of heating, etc.
In addition, aluminum plates, stainless steel plates, black chrome-plated steel plates, and black nickel-plated steel plates can be used as the material for the reflector plate 3, but from the viewpoint of performance and price, etc. Aluminum board is preferred. The thickness of the aluminum ζ plate used for manufacturing the reflector plate 30 is usually
/ sea bream less than sea bream is sufficient.

Next, the heat dissipation surface is very difficult./60 Taiga x Sano.

Record, the thickness of the aluminum plate that makes up the reflector J is a!
Pot style, the grid spacing of the same reflector is 10, the grid height is J
A continuous drying oven 4 as shown in Figs. 1 and 3 was prepared by arranging and installing unit far-infrared heaters H having the shape shown in Fig. 1, which is an Om solution.

The distance between the heat dissipation surface of this drying oven 1KsP and the net conveyor was 100 degrees.

Using the drying oven 6 shown in Figs. 2 and 3, air is continuously introduced from the air outlet j at a rate of 100 n''/hour, and is continuously exhausted from the air outlet! JOOCI
If the net conveyor and the bare conveyor were moved at a speed of 2 grooves/min while maintaining the IC, the temperature of the steel plate constituting the conveyor ≠ would be t between the center of the central part of the furnace t and both sides.
ro** The difference is Toshi, and the power consumption of the furnace is 1 hour in French IKW.

On the other hand, when the same test was performed with the reflector 3 removed, the temperature difference was much smaller and the power consumption was 4KW1 hour.As is clear from this comparative test, the reflector 3 was removed. By providing K, heating within the furnace can be made uniform, thermal efficiency can be increased, and power consumption can be saved.

[Brief explanation of the drawing]

FIG. 1 shows a perspective view of an example of the planar far-infrared heater of the present invention, and FIG. 2 shows a partially cutaway side view of a drying oven using the planar far-infrared heater shown in FIG. FIG. 3 is a top view taken along the line AA' in FIG. 2. Each reference numeral in the drawings indicates the following. H-Conflict/Planar far-infrared heater/... Planar heat radiator λ... Heat radiation surface 3... Grid reflector... Net conveyor! ...-Bent air outlet j′...Exhaust port B...Drying oven

Claims (1)

[Claims] / A planar far-infrared heater comprising a lattice-shaped reflector plate having a plurality of lattice-shaped spaces made of an infrared reflective material attached to the front surface of a heat radiating surface of a WJ-shaped heat radiator. 8. The heater according to claim 7, wherein the second reflector plate is made of metal aluminum.