JP4582676B2 - Exhaust device for combustion apparatus and method for manufacturing the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a combustion apparatus in which noise during combustion is a problem in use, and more particularly to an exhaust apparatus such as a domestic water heater, a kettle, and a combined function machine of a kettle with a kerosene fuel. It is.
[0002]
[Prior art]
A conventional exhaust device for a combustion apparatus, for example, an exhaust apparatus for a combustion apparatus such as a domestic petroleum water heater, is proposed in Japanese Patent Application Laid-Open No. 2000-074356 as “a silencer for a combustor and a method for manufacturing the same”.
In the prior art of the present invention, the surface of the sound absorbing material constituting the exhaust device (the silencer according to the conventional invention) is not processed and the direction thereof is not set to a predetermined direction.
In addition, the exhaust passage inside the exhaust device made of sound absorbing material or the like is bent, and there are a plurality of exhaust passages that repeatedly change the exhaust direction by 180 ° from the exhaust inlet to the exhaust outlet of the exhaust device. The number of bent exhaust passages was not increased while reducing the exhaust resistance.
[0003]
[Problems to be solved by the invention]
However, the exhaust device of the conventional combustion device has the following problems.
a. In a combustion apparatus, in particular, a domestic oil water heater, it is inevitable that noise is generated during combustion, and there is a problem in that noise reduction is a user and social requirement performance. In addition, the degree of noise reduction depends on the user's usage such as where the user installs the combustion device or at what time zone the user mainly uses the combustion device. The degree of demand changes, and further changes depending on the distance between the user and the nearby third party, and the relationship between the user and the third party. There was a problem that there was no limit.
[0004]
b. As a means of reducing the noise of the exhaust device of the combustion device, it has been known that the shape of the exhaust passage contributes to the improvement of the silencing performance by providing a large number of bent portions. By increasing the exhaust resistance, the relationship with the cross-sectional shape of the exhaust passage becomes important, and the volume of the exhaust device increases, and the external dimensions of the combustion device itself increase accordingly.
[0005]
c. Further, in order to increase the number of exhaust passages that repeatedly change the exhaust direction by 180 ° from the exhaust inlet to the exhaust outlet of the exhaust device, it is necessary to increase the number of bent exhaust passages while reducing the exhaust resistance. As a result, there is a problem in that the price of the exhaust system increases due to an increase in the price of the component itself due to an increase in the number of components and an increase in the number of assembly steps due to the complexity of the assembly.
[0006]
SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object of the present invention is to provide an exhaust device for a combustion device that can reduce noise and is easy to manufacture.
[0007]
[Means for Solving the Problems]
The exhaust system of the combustion apparatus of the present invention according to claim 1 is an exhaust system for a combustion apparatus including a sound absorbing material made of a flat plate in which heat-resistant artificial mineral fibers are laminated on a part or all of the surface of the exhaust passage that contacts the exhaust gas. In the apparatus, a part or all of the surface of the sound absorbing material in contact with the exhaust has a plurality of grooves (soots) orthogonal to the exhaust flow direction of the exhaust passage, so that noise can be reduced. .
[0008]
According to a second aspect of the present invention, there is provided a method for manufacturing an exhaust device for a combustion apparatus, comprising a sound absorbing material comprising a flat plate in which heat-resistant artificial mineral fibers are laminated on a part or all of a surface of an exhaust passage that contacts exhaust. In the exhaust device of the apparatus, at least one surface of the sound absorbing material has a soot generated by molding, the surface having the soot is directed to a side in contact with the exhaust, and the direction of the soot is in a direction perpendicular to the flow of the exhaust By mounting the sound absorbing material in the exhaust device, it becomes possible to manufacture an exhaust device that reduces noise.
[0009]
An exhaust system for a combustion apparatus according to a third aspect of the present invention is an interior comprising a bent exhaust passage which is surrounded by a substantially rectangular parallelepiped by a sound-absorbing material made of a flat plate on which artificial mineral fibers having heat resistance are laminated and forms a part of the exhaust passage. In the exhaust device of a combustion apparatus having a silencer with a space, the bent exhaust passage is a plurality of stacked exhaust passages that repeatedly change the flow direction of exhaust gas by 180 ° from the exhaust inlet to the exhaust outlet of the exhaust device. The partition sound-absorbing material having the same shape and a plurality of partition sound-absorbing materials, and at least one surface of the partition sound-absorbing material has a soot generated by molding, and the surface having the soot is directed to the side in contact with the exhaust, and the orientation of the soot is is mounted in the exhaust system of the sound absorbing material such that the direction perpendicular to the flow of exhaust by the partition sound absorbing material of substantially all of the plurality of exhaust passages can be in the internal space of the muffler portion By having a pair of fixed plates of the same shape that form one exhaust passage and a guide portion that changes the exhaust direction by a curved surface at the end of the fixed plate, manufacturing is easy and noise is reduced. It was possible.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of an exhaust device for a combustion apparatus according to the present invention will be described below with reference to the drawings.
FIG. 1 is a configuration diagram of main components of a combustion apparatus having an exhaust device, FIG. 2 is a sectional configuration diagram in which a cut-off shape is illustrated for explaining the internal configuration of the silencer exhaust device shown in FIG. 1, and FIG. FIG. 4 is an exploded view for explaining the sound absorbing material and its fixing plate in FIG. 3, and FIG. 5 is a view of the sound absorbing material in FIG. It is an exploded view explaining a fixed plate. In the description of each part, the same portions are denoted by the same reference numerals and description thereof is omitted.
[0011]
In the block diagram of the combustion apparatus of the present invention shown in FIG. 1, reference numeral 1 denotes a combustion apparatus that is a domestic petroleum water heater, in which the exterior front door is removed in order to explain the inside. 2 is an oil burner provided with a fuel spraying means, a blowing means, an ignition means, a combustion safety device and the like as a combustion part of the combustion apparatus 1 and is attached to the upper part of a heat exchanger described later. 3 is a heat exchanger that exchanges heat with water that is passed through the heat energy that is generated when the oil in the oil burner 2 burns, and 4 is a combustion apparatus 1 that uses the exhaust gas after heat exchange is performed by the heat exchanger 3. The outside is covered with a sheet metal case to guide it to the outside, and a connecting portion exhaust device having a sound absorbing material inside and mainly functioning as a communication exhaust passage to a silencer exhaust device to be described later is the same as the heat exchanger. 3. A muffler exhaust apparatus having a case where the outside is covered with a sheet metal to guide the exhaust after heat exchange in 3 to the outside of the combustion apparatus 1 and having a plurality of bent exhaust passages inside and mainly having a muffler function And it is arrange | positioned at the side of the said heat exchanger 3. As shown in FIG. Reference numeral 6 denotes an exhaust port opened at the end of the silencer exhaust device 5.
Moreover, the a part of the fracture | rupture part provided in the said silencer exhaust apparatus 5 for description is demonstrated in FIG. 2 mentioned later.
[0012]
As described above, the combustion device 1 is configured, and the external shape of the combustion device 1 is a substantially rectangular parallelepiped as shown in FIG. 1 in consideration of the design, installation space, ease of manufacturing, etc. when installed. Therefore, the oil burner 2 and the heat exchanger 3 are disposed within the range of the outer dimensions of the combustion device 1, and the communication unit exhaust device 4 and the muffler exhaust gas are exhausted. In order to arrange the device 5, the shape of the silencer exhaust device 5 is determined by the shape of the oil burner 2 and the heat exchanger 3.
That is, it is desirable that the silencer exhaust device 5 should have a height that is the sum of the oil burner 2 and the heat exchanger 3, a depth that is the depth of the heat exchanger 3, and a width that is as small as possible. The size of the exhaust passage can be secured, and the overall shape is a substantially rectangular parallelepiped with a long height direction.
[0013 ]
FIG. 2 is a sectional configuration diagram of a broken shape , illustrating details of the portion a broken in the silencer exhaust device 5 of the combustion apparatus 1 of FIG. This is an exhaust passage in the space through which the exhaust passes, and is composed of multi-stage bent portions. The exhaust passage 20 is surrounded by a partition sound-absorbing material 21 up and down, the right sound-absorbing material 22 and the left sound-absorbing material 23 on the left and right sides, and the back sound-absorbing material 24 and the front sound-absorbing material 25. However, the front sound absorbing material 25 is described in a partially removed state for convenience of description. In addition, the upper and lower surfaces of the partition sound absorbing material 21 through which the exhaust passes have a plurality of grooves 26 in a direction orthogonal to the direction in which the exhaust passes. Reference numeral 27 denotes a sound-absorbing material fixing plate set which is a sheet metal (generally referred to as punching metal) having a plurality of holes for securing the exhaust passage 20. For the purpose of explanation, the sound absorbing material fixing plate set 27 is indicated by a broken line 27a to represent the exhaust passage 20.
[0014]
Here, the arrow b indicates the flow of exhaust gas, and the upper and lower surfaces of the partition sound absorbing material 21 that are in contact with the exhaust gas are provided with a plurality of grooves 26 in the direction orthogonal to the flow of exhaust gas. In the material 22 and the left sound-absorbing material 23, a plurality of grooves 26 are provided in a direction parallel to the horizontal exhaust flow. This is because the shape of the exhaust passage 20 in the horizontal direction is longer in the width dimension than in the height dimension. This is because the number of times of bending of the exhaust passage 20 can be increased so that the noise can be further reduced, and the exhaust resistance is increased by reducing the height of the cross-sectional area of the exhaust passage 20 in order to increase the number of times of bending. This is because the width dimension is increased so that the cross-sectional area of the exhaust passage 20 is ensured. For this reason, the right sound absorbing material 22 and the left sound absorbing material 23 do not work very much in the horizontal exhaust flow b, and the vertical direction shifts from the horizontal exhaust flow to the upper horizontal exhaust flow. This is because a groove (soot) on the surface of the right sound absorbing material 22 and the left sound absorbing material 23 in the exhaust flow portion has a sound absorbing effect when orthogonal to the exhaust flow. Of course, the right sound-absorbing material 22 and the left sound-absorbing material 23 are divided into small parts so that all surfaces are orthogonal to the flow of exhaust gas. It is said. Furthermore, the exhaust contact surface of the back sound absorbing material 24 and the front sound absorbing material 25 is only the portion of the vertical exhaust flow that moves from the horizontal exhaust flow to the upper horizontal exhaust flow. A plurality of grooves 26 are provided in a direction perpendicular to the vertical exhaust flow.
[0015]
Therefore, in FIG. 2, as described above, the silencer exhaust device 5 includes the exhaust flow b of the partition sound absorbing material 21, the right sound absorbing material 22, the left sound absorbing material 23, the back sound absorbing material 24, and the front sound absorbing material 25. Since the groove (畝) 26 is provided on the contact surface, the groove (畝) 26 orthogonal to the exhaust flow b does not directly obstruct the exhaust flow b, and does not directly disturb the exhaust flow b, thereby causing exhaust air vibrations. On the other hand, it works to attenuate more.
[0016]
FIG. 3 is a cross-sectional view of the silencer exhaust device 5 taken along the line AA in the combustion device 1 of FIG. 1 and is a diagram for explaining the configuration of internal components. In the description, the lid and the right sound absorbing material 22 are removed. 30 is a connection port from the communication unit exhaust device 4 at the lower part of the silencer exhaust device 5, and 31 is an outlet exhaust which is a part of the silencer exhaust device 5 but is an exhaust passage on the outlet side to the exhaust port 6. A passage 32 is an outlet sound absorbing material that covers the outlet exhaust passage 31.
[0017 ]
In FIG. 4, a description is given in a state where two sets of the sound absorbing material 21 and the sound absorbing material fixing plate set 27 of FIG. 3 are taken out. FIG. 5 is an exploded view of the sound absorbing material fixing plate set 27 of FIG. In the figure, 33 is a sound absorbing material fixing plate which is one side of a sheet metal member of the same shape constituting the sound absorbing material fixing plate set 27, and 34 is a guide portion which changes the direction of exhaust gas which is curved at one end of the sound absorbing material fixing plate 33. Thus, no hole is formed in the guide portion 34.
[0018]
3, 4, and 5, the partition sound absorbing material 21 is attached so as to protrude alternately from the back sound absorbing material 24 or the front sound absorbing material 25 in order to bend the exhaust passage 20. Furthermore, the sound absorbing material fixing plate set 27 has a plurality of holes for securing the exhaust passage 20 and for facilitating noise absorption in the partition sound absorbing material 21 and the like.
In FIG. 3, the sound absorbing function of the silencer exhaust device 5 is achieved by a combination of nine sound absorbing material fixing sets 27 including nine sound absorbing material fixing plates 33 and nine partition sound absorbing materials 21. An exhaust passage 20 is formed.
For this reason, with this configuration, the sound absorbing material fixing plate 33 is a sound absorbing material fixing plate set 27 in which two identical ones are combined by changing the direction by 180 ° with the guide portion 34 projecting from both ends. The sound-absorbing material fixing plate 33 can be easily processed by a sheet metal mold and can be formed by one sheet metal mold. In addition, since the height dimension of the silencer exhaust device 5 can be increased or decreased by increasing or decreasing one set of the sound absorbing material fixing plate set 27 and the partition sound absorbing material 31, for example, the oil in FIG. When the height dimension of the burner 2 and / or the heat exchanger 3 is changed by the increase or decrease of the combustion amount and the accompanying hot water supply amount, the height dimension of the combustion device 1 also changes. The height dimension of 5 also needs to be changed, and this can be easily adjusted.
In addition, due to these, the exhaust passage 20 can be a bent exhaust passage that is bent a plurality of times, and by having the guide portion 34, it is difficult to be affected by the exhaust resistance.
[0019]
Since the partition sound absorbing material 21 and the like of the silencer exhaust device 5 in FIG. 3 are provided with grooves (soot) 26 in the direction perpendicular to the flow of exhaust gas on the surface in contact with the exhaust gas as in the description of FIG. It becomes to improve the silencing performance as Oite described in FIG.
[0020]
The partition sound-absorbing material 21 and the other right sound-absorbing material 22, left sound-absorbing material 23, back sound-absorbing material 24, front sound-absorbing material 25, etc. in FIGS. 2 and 3 have heat resistance and have a predetermined thickness in which artificial mineral fibers are laminated. This means that the flat plate is used as it is, or is assembled by cutting it into an appropriate size. Artificial mineral fibers are called rock wool or glass wool, etc., which are laminated and molded into a flat plate with a predetermined thickness. The flat plate makes it easy to assemble , and the exhaust contact surface. It is also easy to provide the groove 26 on the surface .
[0021]
As described above, the exhaust system of the combustion apparatus is configured in the embodiment, and thus has the following effects.
a. In Claim 1, the effect | action which improves the sound absorption performance of a sound-absorbing material by providing a several groove | channel (畝) in the surface of the flat sound-absorbing material which laminated | stacked the artificial mineral fiber with heat resistance, and a groove | channel (畝) are provided. It has the effect of being easy to provide and easy to assemble .
b. According to claim 2, the sound absorbing performance of the exhaust device of the combustion device is improved by a manufacturing method in which a plurality of grooves (soots) on the surface of a flat plate sound absorbing material laminated with heat-resistant artificial mineral fibers are aligned in a predetermined direction. It has the effect | action and the effect | action that it is easy to provide a groove | channel (reed) and an assembly .
c. In Claim 3, it comprises a plurality of sets of a flat partition sound-absorbing material laminated with heat-resistant artificial mineral fibers and a sound-absorbing material fixing plate, and a plurality of grooves (畝) on the surface of the sound-absorbing material.
Providing the bent exhaust passage has the effect of enhancing the sound absorbing effect of the sound absorbing material while having the ease of manufacturing the bent exhaust passage, and the effect of providing the groove (畝) easily and assembling .
[0022]
【The invention's effect】
According to the present invention, the exhaust device of the combustion device can have the following contents.
a. In claim 1, the exhaust of the combustion apparatus is provided by the action of improving the sound absorbing performance of the sound absorbing material itself by providing a plurality of grooves (soots) on the surface of the flat sound absorbing material on which heat-resistant artificial mineral fibers are laminated. Since the sound absorption performance of the entire apparatus is improved, the noise of the combustion apparatus is reduced and the exhaust apparatus of the combustion apparatus can be easily manufactured .
b. In claim 2, the sound absorbing performance of the exhaust device of the combustion apparatus is improved by a manufacturing method in which a plurality of grooves (soots) on the surface of a flat plate sound absorbing material on which heat-resistant artificial mineral fibers are laminated are aligned in a predetermined direction. Therefore, it has the effect of reducing the noise of the combustion device and the effect of facilitating the manufacture of the exhaust device of the combustion device .
c. In Claim 3, it comprises a plurality of sets of a flat partition sound-absorbing material laminated with heat-resistant artificial mineral fibers and a sound-absorbing material fixing plate, and a plurality of grooves (畝) on the surface of the sound-absorbing material.
Since the sound absorption effect of the sound absorbing material is enhanced while having the ease of manufacturing the bent exhaust passage, the sound absorption performance is superior to the exhaust device having the same outer shape, and the noise of the combustion device is reduced. It has the effect.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a combustion apparatus of the present invention.
FIG. 2 is an enlarged explanatory view of the exhaust device of the present invention.
FIG. 3 is a cross-sectional view taken along the line AA of FIG.
FIG. 4 is an exploded view for explaining FIG. 3;
FIG. 5 is an exploded view of the sound absorbing material fixing plate set.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Combustion device 2 Petroleum burner 3 Heat exchanger 4 Connecting part exhaust device 5 Silencer exhaust device 6 Exhaust port 20 Exhaust passage 21 Partition sound absorbing material 22 Right sound absorbing material 23 Left sound absorbing material 24 Back sound absorbing material 25 Front sound absorbing material 26 Groove )
27 sound absorbing material fixing plate set 27a sound absorbing material fixing plate set 30 connection port 31 outlet exhaust passage 32 outlet sound absorbing material 33 sound absorbing material fixing plate 34 guide portion a breaking portion b flow of exhaust

Claims (3)

In the exhaust system of a combustion apparatus having a sound absorbing material made of a flat plate in which heat-resistant artificial mineral fibers are laminated on a part or all of the surface of the exhaust passage in contact with the exhaust, a part of the surface of the sound absorbing material in contact with the exhaust Alternatively, the exhaust system of the combustion apparatus has a plurality of grooves (soots) perpendicular to the direction of exhaust flow in the exhaust passage. In an exhaust system of a combustion apparatus provided with a sound absorbing material made of a flat plate in which heat-resistant artificial mineral fibers are laminated on a part or all of the surface in contact with the exhaust of the exhaust passage, at least one surface of the sound absorbing material is formed by molding There is a generated soot, the surface having the soot is directed to the side in contact with the exhaust, and the sound absorbing material is mounted in the exhaust device so that the direction of the soot is perpendicular to the flow of the exhaust A method for manufacturing an exhaust device for a combustion apparatus. In an exhaust system of a combustion apparatus having a muffler portion having an internal space composed of a bent exhaust passage surrounded by a substantially rectangular parallelepiped by a sound absorbing material made of a flat plate laminated with artificial mineral fibers having heat resistance, and forming a part of the exhaust passage , the bent exhaust passage and the partition sound absorbing material of a plurality of the same shape from the exhaust inlet to an exhaust outlet which partitions to the plurality of stacked exhaust passage repeated changing 180 degrees the flow direction of the exhaust of the exhaust system, the At least one surface of the partition sound-absorbing material has wrinkles generated by molding. The sound-absorbing material is oriented so that the surface having the wrinkles is directed to the side in contact with the exhaust gas and the direction of the wrinkles is perpendicular to the flow of the exhaust gas. is mounted in the exhaust system, a pair of identical shape to form a generally whole one exhaust passage of a plurality of exhaust passages can be in the internal space of the muffler portion by the partition sound absorbing material And more becomes fixed plate, exhaust system of a combustion device, characterized in that the end portion of the fixing plate having a guide portion for changing the exhaust direction by a curved surface.

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