JPH042844B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a radiator which is configured to emit infrared rays from the infrared radiator toward a heated object by heating the infrared radiator made of, for example, ceramic foam. Regarding mold heating equipment,
In particular, the present invention relates to a radiation heating device that can be suitably used as a cloth drying device or a thermosol type cloth dyeing device.

Conventionally, this type of heating device is made of a ceramic foam, a porous fired ceramic, an oxidation catalyst layer, etc. that closes the upper opening of a bottomed cylindrical case a, as shown in FIG. An infrared radiator b is fixedly installed, and fuel gas and combustion air are fed into the bottom space c of the case a to mix them, and the mixture is combusted on and near the surface of the radiator b. By making the surface of the radiator b red hot, for example, a solid line arrow d is drawn above it.
Infrared rays f...
It was configured to radiate... g in the figure
are guide plates erected on both sides of the object to be heated e, and a dashed-dotted arrow h indicates the flow direction of the combustion exhaust gas.

However, such a conventional radiation heating device has a basic drawback of low heating efficiency, and especially when the heated object e is thick cloth or paper. , the radiant infrared rays f... cannot pass through the object e to be heated in the thickness direction, and only the surface on the side of the radiator b is rapidly heated and dried, but the inside is not sufficiently dried. It had the drawback of causing uneven heat.

The present invention has been made in view of the above-mentioned conventional situation, and its purpose is to provide a radiation-type heating device that can reduce the occurrence of uneven heating of the object to be heated and can obtain high heating efficiency. It's about doing.

Hereinafter, first, an embodiment of the radiation type heating device according to the present invention will be described based on FIG. 2.

An infrared radiator 2 made of a porous ceramic foam having a three-dimensional network skeleton structure is placed in a state where the upper opening of the bottomed cylindrical case 1, which is quadrilateral in plan view, is closed.
is fixedly installed, and the bottom space S1 of the case 1 is
By feeding fuel gas and combustion air into the interior of the radiator and mixing them, and burning the mixture at a relatively low temperature on and near the surface of the radiator 2, the surface of the radiator 2 becomes red-hot. , infrared rays (or far infrared rays, ultra-far infrared rays) F... are directed upward from the surface thereof, that is, toward the object 3 to be heated such as cloth or paper that is being transferred upward in the direction of the solid line arrow (X). The case 1 is configured to radiate and emit combustion exhaust gas upward, and the case 1 is provided at both front and rear edges with respect to the transfer direction of the heated object 3, as shown by double-dashed chain arrows in the figure. Mechanisms A and A that eject gas (air in this embodiment) toward the object to be heated 3 are attached to the case 1, and on both left and right sides of the case 1, there are plates 4 extending above the object to be heated 3. , 4 have been erected. This plate 4 has both a function as a guide member that prevents the object to be heated 3 from shifting in the left and right directions, and a function as a shield plate that prevents the combustion exhaust gas from flowing in the left and right directions.

The gas ejection mechanisms A, A are introduced with branched air supplied from the combustion air supply source (blower 5) from below, and have an upper end edge substantially equal to the distance between the left and right plates 4, 4. Air chambers 6, 6 having slit-shaped gas outlets 6a, 6a of equal length,
integrally on both front and rear edges of the case 1, and
It is configured to be connected to the infrared radiator 2 so as to be in contact with the infrared radiator 2.

According to the above configuration, as combustion occurs on the surface of the infrared radiator 2, infrared rays F... are radiated from the surface toward the object to be heated 3, and hot air rising from the surface (in this case, the combustion exhaust gas)
As shown by the dashed-dotted line arrows in the figure, the gas is suctioned and mixed with the gas ejected from both the gas ejection mechanisms A and A, and together with the ejected gas, it becomes a jet stream of 150°C to 200°C and flows inside the heated object 3. It passes through and is discharged upwards.
Therefore, the radiant infrared rays F passing through the heated object 3...
Even if the amount of heating is small, the inside of the object to be heated 3 is well heated by the retained heat of the combustion exhaust gas passing through it, and there is almost no uneven heating in the thickness direction. It can be heat-dried well in this state. In particular, in this embodiment, the gas ejection mechanisms A, A are configured to substantially close the periphery of the space S2 between the infrared ray radiator 2 and the object to be heated 3 with the ejected gas. Since they are provided at all necessary positions (in this case, both front and rear), the combustion exhaust gas rising from the surface of the infrared radiator 2 has no place to escape and can be attracted and mixed with the ejected gas extremely well.

Furthermore, in this embodiment, the gas ejection mechanisms A, A are provided in a state in which they are in contact with the infrared radiator 2 serving as the combustion section, so that the ejected gas is preheated to some extent and the surroundings of the device become high temperature. This inconvenience can also be prevented.

Note that even when the gas ejection mechanism A is provided only at either the front or the rear, a considerable exhaust gas suction and passage effect can be exerted, although it is not as good as that of the above embodiment.

Further, each of the gas ejection mechanisms A includes, as a means 7 for promoting swirling of the ejected gas,
For example, if a swirling nozzle is provided within the gas jet port 6a, an even better exhaust gas suction effect can be expected.

Furthermore, the infrared radiator 2 is not limited to the one in the above embodiment, but other types such as a porous fired ceramic plate or an oxidation catalyst plate may be used, or an electric infrared radiator may be used. (In this case, the ejected gas is not the combustion exhaust gas, but air heated by the radiant is mixed by suction).

Furthermore, the ejected gas is not limited to air, and other gases may also be used.

In summary, the radiation heating device according to the present invention includes a gas jetting mechanism that spouts gas toward the heated object around the infrared radiator configured to radiate infrared rays toward the heated object. the gas jetting mechanism is arranged at all positions necessary to substantially close the periphery of the space between the infrared radiator and the object to be heated with the gas jetted by the gas jetting mechanism, and the gas jetting mechanism It is characterized in that the ejection port of the mechanism is directed toward the inside of the space.

The functions and effects exhibited by the above characteristic configuration are as follows.

In other words, all positions necessary for the gas ejection mechanism that ejects gas toward the object to be heated to substantially close the circumference of the space between the infrared radiator and the object to be heated by the ejected gas. Since the combustion exhaust gas rising from the surface of the infrared radiator has no place to escape, it becomes trapped in the space, and most of the combustion exhaust gas trapped there becomes the gas jetted out from the gas jetting mechanism. They are suction-mixed and blown against the object to be heated together with the ejected gas, and if the object to be heated is a gas-permeable material, those gases pass through the gas-permeable material.

In particular, in the present invention, since the ejection port of the gas ejection mechanism is directed toward the inside of the space, the suction mixing can be performed sufficiently, and a large flow velocity can be applied to the combustion exhaust gas that is suctioned and mixed with the ejected gas. As a result, if the object to be heated is a gas-permeable material, it can be sufficiently passed through the gas-permeable material.

Therefore, the object to be heated is heated by the infrared rays radiated from the infrared radiator, and most of the combustion exhaust gas rising from the surface of the infrared radiator is blown onto the object at a high flow rate without escaping. In particular, when the object to be heated is made of a gas-permeable material, the object to be heated can be sufficiently passed through the air-permeable receiver, so even if the object to be heated is thick, the object to be heated can be It has now been possible to heat evenly and satisfactorily all the way to the inside, and the overall heating efficiency has also been significantly improved.

[Brief explanation of drawings]

FIG. 1 is a schematic side sectional view for explaining a radiation type heating device having a conventional configuration. FIG. 2 is a schematic side sectional view showing one embodiment of the radiation type heating device according to the present invention. 2... Infrared radiator, 3... Heated object, 7...
Vortex formation promotion means, A... gas ejection mechanism, 6a...
Spout, S2...space.

Claims (1)

[Claims] 1. A gas ejection mechanism A for ejecting gas toward the object to be heated 3 is provided around the infrared radiator 2, which is configured to radiate infrared rays F toward the object to be heated. The gas ejection mechanism A is attached to the infrared radiator 2 and the object to be heated 3 by the ejected gas.
The radiation heating device is disposed at all positions necessary to substantially close the periphery of the space S2 between the space S2 and the gas ejection mechanism A, and the ejection port 6a of the gas ejection mechanism A is directed toward the inside of the space S2. 2 The gas ejection mechanism A is connected to the infrared radiator 2.
2. The radiation heating device according to claim 1, which is arranged in a row so as to be in contact with the radiant heating device. 3. The radiation heating device according to claim 1 or 2, wherein the gas ejection mechanism A is provided with a means 7 for promoting swirling of the ejected gas.