JPS59205531A - Radiating device of long-wave infrared rays - Google Patents

Abstract

PURPOSE:To make temperature fixed all over an infrared-rays radiating surface and thereby to radiate infrared rays of the same wavelength, by sending hot air directly into a heating chamber. CONSTITUTION:A combustion gas generated from a combustion chamber 16 by a liquid-fuel or gaseous-fuel device 13 is sent into a heating chamber 11 through a bored diffusion plate 18 to heat a concentric-circle-shaped wave-form bored plate 12, and thereby long-wave infrared waves are emitted from the surface of this plate coated with ceramic by flame spray. The gas having finished heating is let out from the holes of the plate and heats a substance to be heated by its residual calories, while removing the partial saturation of the heated substance and thus improving a heating efficiency. The holes 26 of the metal plate 12 are made in the bottom parts of wave forms at intervals and diameters determined by calculations. A gap (e) between the hole 26 and a baffle plate 14 is set to be fixed, together with four corners by adjusting (f) beforehand by means of an adjusting rod 23, and thus the surface temperature- the wavelength of infrared rays- of an infrared ray radiating plate can be selected to be in the most preferable conditions for the purpose of heating.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a long-wavelength infrared radiation device using combustion of liquid or gaseous fuel.

Long-wavelength infrared rays with a wavelength of about 3μ to 150μ are used in most plastic materials, paints, and foods.

It is well known that scales are resonantly absorbed by water, fats and oils, and have amazing effects on heating and drying, and two types of radiating devices have been developed.

The currently announced long-wavelength infrared radiation devices are shown in Figure 1.
There are two types: one that uses electric heating as shown in FIG. 2, and one that burns liquid fuel or gaseous fuel as shown in FIGS. 3 and 4. In either case, a ceramic tube or a steel tube coated with ceramic is heated to emit long-wavelength infrared rays.

However, since electric heating uses electricity as a heat source, its fuel consumption is two to three times higher than those using liquid fuel or gas fuel.

In addition, currently announced models that use liquid fuel or gaseous fuel feed combustion gas into the JR pipe from one end and release the heated gas from the other end. An example of the gas temperature from the gas inlet point A of the infrared ray tube in FIG. 3 to the gas discharge point, and at points B and O of each part of the radiator tube is shown in a graph in the following FIG. 5. As is clear from this, the temperature of the radiant tube from the gas inlet to the outlet varies greatly in each part.

In the diagram, the gas temperature difference of 250C between the inlet and outlet is used for infrared radiation, but the amount of heat equivalent to 200C emitted to the outside is a total loss, and the thermal efficiency in this case is It is about 55%.

On the other hand, if the temperature difference between the inlet and the outlet is large in order to increase thermal efficiency, the temperature difference between each part of the radiation tube will be large.

Next, as shown in FIG. 6, the wavelength and radiation energy of the infrared rays emitted from the radiation tube differ depending on the temperature.

For this purpose, currently announced liquid fuel or gas fuel combustion type long wavelength infrared radiating devices.

Differences in temperature and drying efficiency occur in each part of the entire device.

Also, thermal efficiency is extremely low.

The present invention provides a long-wavelength infrared radiating device that eliminates the deficiencies of currently published radiating devices mentioned above.

Next, two embodiments of the present invention will be described with reference to the drawings.

FIG. 7, FIG. 8, and FIG. 9 show an embodiment in which the number of heating chambers is one. 7 is a plan view seen from above, FIG. 8 is a plan view seen from section f, and FIG. 9 is a cross section taken along the line EE in FIG. 7.

As shown in Figure 2, the present invention includes a heating chamber (11) and a concentric corrugated perforated metal plate (12) for long wavelength infrared radiation.

Combustion chamber (16) for liquid fuel or gaseous fuel, baffle plate (14)
), a diffusion plate (18), and a distance adjustment device F between the metal plate perforation and the baffle plate.

Liquid fuel or gaseous fuel combustion type @ (13), combustion chamber (16)
) The combustion gas generated from (17) becomes a gas of about 700C by adopting the external formula, and is blown into the /JO heat chamber (11), which heats the corrugated perforated plate (12) to about 450'C. Emit long wavelength infrared rays from the surface. Ceramic resin is thermally sprayed on the surface of (12). (18) is a perforated plate. The heated gas is released from the perforations and uses its residual thermal acid to heat the object to be heated, while also removing partial saturation of the object to improve heating efficiency.

FIG. (10) shows details of the distance adjusting device F between the perforated metal plate and the baffle plate. (14) is a baffle plate, and (20) is its support plate. (21) is a rod that holds the support plate, and is constantly pushed upward by a spring (22). Reference numeral (23) is an adjustment rod, which has a structure in which the distance f can be adjusted with a screw. (15) is a small Chen Chinsha.

As shown in FIG. 7, they are placed at the four corners of the heating chamber and are heated by Cheno (19).

Next, FIG. 11 shows details of the relationship between the perforations in the metal plate and the baffle plate. The perforations (26) are made at calculated intervals and diameters in the F-shaped convex portion of the wave. In advance, adjust the adjustment rod (
By adjusting f according to 23), the distance e between the perforation and the baffle plate can be set constant at all four corners. On the other hand, the chain wheel (15
) is held in place by the racket (24).

It is connected to the rod (25) by a screw.

Therefore, when the chain wheel (15) is rotated, the rod (25) is moved up and down by the screw. At this time, the # wheels at the four corners of the heating chamber move in the same way due to the Cheno (19), so the four rods (25) arranged at the four corners also move in the same way. Thus, the square spacing e between the borehole and the baffle is always kept at the specified value.

In this way, the surface temperature of the infrared radiation plate-infrared wavelength can be selected to be the most favorable condition for heating purposes. This is because even if the amount of gas released from the perforation increases or decreases by changing the amount of combustion in the dome or the amount of outside air taken in, the emitted scum resistance can be adjusted by adjusting the distance e between the baffle plate and the perforation. This is because the pressure inside the combustion chamber (16) can be maintained in the most preferable state. If the pressure in the combustion chamber (16) is too high, combustion will be incomplete, and if it is too low, the amount of combustion will blow out into the heating chamber, which is undesirable.

The one shown in Figures 7 and 8 is an example in which there is one JJII heat chamber, but the second one shown in Figure 12 is the same heating chamber as the one shown previously. An example will be shown in which the four side beams of the chambers are joined together to form a single closure, and the chambers are further combined into multiple sets to form a large-sized device.

(27) shows the combustion device, and (28) shows the outside air intake device.

All four rooms are common. The outside air taken in through (28) is distributed to each room through ducts (29). on the other hand,
The combustion gases are distributed to each chamber by ducts (30). In this way, a large capacity radiation device can be constructed by combining a large number of unit heating devices.

Thus, the present invention eliminates the deficiencies of currently published radiating devices and has the following major features and advantages:

1. Compared to long-wavelength infrared radiating equipment using Ryuki Takinen, the fuel consumption is 1 because it uses liquid fuel or gaseous fuel.
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2. Compared with the current long wavelength infrared radiating device using liquid fuel or gaseous fuel, it has the following features and advantages.

(1) Since hot air is blown directly into the heating chamber, the temperature is constant over the entire infrared radiation surface and infrared radiation of the same wavelength is emitted.

(2) By discharging the exhaust gas after heating the infrared radiation plate through the perforation, the exhaust gas contributes to heating and also eliminates partial saturation of the heated object.

Therefore, the thermal efficiency is close to 100% and the drying conditions can be improved.

(3) The infrared radiation plate is pressed into a wave shape. For this reason, the effective area of radiation is about 40% larger than that of a flat plate, and not only can a large amount of heat be absorbed, but also the wave shape diffusely reflects infrared rays, greatly increasing the radiation density. Furthermore, the mechanical strength of the radiation plate is increased.

(4) By arbitrarily adjusting the distance between the baffle plate and the perforations, the pressure in the combustion chamber can be maintained at an optimum level at all times. For this purpose, the combustion level of the fuel and the intake of outside air can be freely adjusted over a certain range. In this way, it is possible to select the optimum radiation plate temperature-long wavelength infrared wavelength for the heating conditions.

(5) The heating amount per unit (1 liter of heating devices) is set to 1 set of 4 units, and any number of sets can be combined.

In this way, it is possible to configure a radiant device with the required heating amount from small to large capacity.

[Brief explanation of the drawing]

The first example shows a long-wavelength infrared radiation device using nichrome wire heating. ■、・・・・・・Nichrome wire 2...
...Insulator 3 ...Ceramink tube
4. Electrical Inlet Terminal FIG. 2 shows a side view of the device shown in FIG. 5. Infrared reflector Figure 3 shows a currently announced long-wavelength infrared radiation device using liquid fuel #4 or gaseous fuel combustion. 6・・・・・・・・・Radiation-It7・・・・・・・・・・・・
Combustion chamber 10...Liquid or gaseous fuel combustion device A.
...... Combustion gas outlet points B, C... - Point D midway in the radiation tube...
. . . Combustion gas discharge point FIG. 4 shows an n-side view of the apparatus shown in FIG. 3. FIG. 5 is a graph showing an example of the temperature of each part in the apparatus shown in FIGS. 3 and 4. FIG. FIG. 6 is a graph showing the relationship between the surface temperature of the long-wavelength infrared radiation tube and the wavelength of the infrared radiation emitted. FIG. 7 shows a top plan view of the case where there is only one heating chamber among the two embodiments of the present invention. FIG. 8 is a plan view of the device shown in FIG. 7, viewed from above. FIG. 9 shows the E-E cross section of the device described in factor 7. FIG. 10 shows details of the device for adjusting the distance e between the perforation and the baffle plate in the devices shown in FIGS. 7 to 9. FIG. 11 shows details of the relationship between the perforations and the baffle plates. d・・・・・・Diameter of hole e・・・・・・
...The distance between the perforation and the baffle plate in Fig. 12 shows that among the nine embodiments of the present invention, one set includes four unit heating chambers, and two or more sets of these are combined to form a large radiating device. Indicate the case. G...----- Indicates a set of four unit joining chambers. i +1EI Figure 2 "1 Lord" L - Group Ichimi Ittou =

Claims (1)

[Claims] In a heating chamber made of a truncated cone or truncated pyramid shaped heat insulating material, a spherical perforated metal plate is arranged in a convex downward manner in the upper narrow part, and the i-type fuel or gaseous fuel is burned from the upper part. Blow in hot air. In addition, a corrugated perforated metal plate is placed in the vast lower part. The outer surface of the corrugated perforated metal plate is thermally sprayed with a ceramic that emits long wavelength infrared radiation. Further, a baffle plate is arranged close to the perforation, and the distance between the perforation and the baffle plate is arbitrarily adjusted to obtain a transparent structure. A long wavelength infrared radiation device characterized by the above features.