JPH0120497Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a combustor using a straight wick.

Conventional configurations and their problems A combustor that uses a straight wick and a combustion tube is suitable as a home heater because it has a short depth and takes up little space indoors, but the structure of the combustion tube Because it is flat, it is easily deformed by thermal stress and thermal expansion caused by combustion, and as combustion and rest are repeated, the perforated plate etc. deform, and the width of the combustion chamber formed by them changes. This has the disadvantage that it tends to cause uneven and incomplete combustion. In order to overcome this drawback, a method has been proposed in which slit-like cuts are made in the vertical direction of the perforated plate.
In this method, expansion due to heat is absorbed by the notches, and even if deformation occurs, the deformation remains within the range between the notches, making it less likely that partial deformation will affect a large area, making it more effective. It was a method. However, because it does not have the ability to hold back deformation in the front and back, the perforated plate divided by the notches, especially in the upper part of the perforated plate, expands and deforms to a different degree due to the difference in temperature, causing displacement in the front and rear direction. The gap between the parts becomes large and a large amount of air enters, causing abnormal combustion, and large deformation causes a change in the area of the combustion chamber, causing uneven combustion.

Purpose of the invention The present invention solves the above-mentioned problems, and aims to provide a combustor that can prevent deformation and provide a uniform and good combustion state.

Structure of the invention In order to achieve this object, the invention has a structure in which a plurality of slit-like cuts are made in a perforated plate, and the upper part of the perforated plate is inserted and held in the groove of the guide plate.

In the above configuration, by preventing longitudinal deformation between the blocks of the perforated plate divided by the notches, changes in the amount of air flowing in through the notches and changes in the width of the combustion chamber are prevented, resulting in uniform combustion. can be achieved.

DESCRIPTION OF EMBODIMENTS Next, embodiments of the present invention will be described with reference to FIGS. 1, 2, and 3.

In FIG. 1, reference numeral 1 denotes a linear lamp wick, the lower end of which is not shown in the figure, but immersed in the fuel in the fuel tank, and the upper end exposed in the combustion chamber. 2 is the wick 1
3 is a front perforated plate having a large number of small holes 3a and slit-like cuts 3b, and 4 is a groove into which the upper end of the front perforated plate 3 is inserted. A guide plate 5 is a rear perforated plate having a large number of small holes 5a and a slit-like cutout 5, a guide plate 6 is a guide plate provided with a groove into which the upper end of the rear perforated plate 5 is inserted and an air hole 6a; 3 and the rear perforated plate 5 form a combustion chamber. 7 is an incandescent body made of lath, punched metal, etc., 8 is a transparent plate made of a light-transmissive material such as glass, and 9 is provided to release the radiant heat generated from the incandescent body 7 to the front side;
10 is a front outer plate for covering the front surface and holding the light-transmitting plate 8, and 10 is a rear outer plate for covering the rear surface.

As shown in FIG. 2, the front perforated plate 3 and the guide plate 4a
Between the grooves, there is a gap in the vertical direction to absorb the thermal expansion of the front perforated plate 3, and a slight gap in the front-back direction to allow the perforated plate 3 to move within the groove. are the rear perforated plate 5 and the guide plate 6
The same applies between.

Further, the guide plate 6 shown in FIG. 3 has an air regulating function by bending one side of the guide plate and providing an air hole 6a.

When combustion occurs in the combustion chamber formed by the gap between the perforated plates 3 and 5, the temperature difference between the perforated plates 3 and 5, where the upper part is higher and the lower part is lower, causes a dimensional difference due to thermal expansion, which causes deformation. It is known to absorb this dimensional difference and prevent deformation by making slit-like cuts 3b and 5b in the perforated plates 3 and 5.
However, another cause of deformation is the temperature difference that occurs between the combustion chamber side surface of the perforated plate and its back surface, and the expansion coefficient of the higher temperature combustion chamber side surface increases, generating an outward bending force. If the temperature is non-uniform in the longitudinal direction of the combustion chamber, the perforated plate will bend uniformly, but in reality, there is some degree of non-uniformity in temperature, so the perforated plate is bent between each block divided by the notches. The degree of deformation is different, and the blocks are shifted back and forth, so the cross-sectional area of the opening of the notch becomes wider, allowing excessive air to flow in, and the width of the combustion chamber becomes uneven.

According to this configuration, by inserting the upper parts of the perforated plates 3 and 5 into the grooves of the guide plates 4 and 6, deformation occurs between the blocks of the perforated plates 3 and 5 divided by the notches 3b and 5b. Since the deviation of the block is regulated by the groove and each block has the same shape, problems caused by deviation can be prevented. Furthermore, by absorbing dimensional changes due to thermal expansion in the vertical direction in the gap between the perforated plate and the groove, it is possible to prevent the influence of dimensional changes on other components.

Next, as shown in FIG. 3, by bending one side of the guide plate 6, deformation in the longitudinal direction of the guide plate 6 can be reduced, and the air holes 6a are
By providing the plate, it can also be used as an air regulating plate, and the number of parts can be reduced.

Effects of the Invention As explained above, according to the present invention, the perforated plate is provided with a plurality of notches, and the upper part of the perforated plate is inserted into and held in the groove provided in the longitudinal direction of the guide plate. Deformation of the perforated plate due to the thermal expansion valve can be prevented and uniform and good combustion can be obtained.

[Brief explanation of drawings]

FIG. 1 is a partially sectional perspective view of an embodiment of the present invention;
FIGS. 2 and 3 are perspective views of essential parts of an embodiment of the present invention. 1... Lamp wick, 3, 5... Porous plate, 4, 6... Guide plate.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A lamp wick in a straight line and a pair of perforated plates provided in front and behind the lamp wick, with a plurality of slit-like cuts in the perforated plates; A combustor, wherein the upper end of the perforated plate is inserted into a groove provided in the longitudinal direction of the guide plate at a distance and held therein. (2) The combustor according to claim 1 of the utility model registration claim, in which the end face of the guide plate is bent. (3) The combustor according to claim 1 of the utility model registration claim, in which an air port is provided in the bent portion of the guide plate.