JP2003004308A - Combustion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combustion device which enables quiet operation by improving a combustion device having two or more blowers in its body case and reducing operating sound of the blowers in the device. SOLUTION: An inner wall 52 of the body case 2 is provided with an obstacle 55 in the vicinity between air inlets 50, 51 which are, respectively, provided for the blowers 25, 26. Specifically, the obstacle 55 has a shape of a box, and is interposed between spaces 65, 66 which are assumed to be made on the opposite inner wall when the inlets 50, 51 are projected thereon. The obstacle 55 functions as a shield against sound. The motor sound of the blower 26 at the hot water supply side leaks through the inlet 51, but is shielded before getting to the blower 25 at the bathroom side. Accordingly, noise that leaks outside the case 2 is reduced.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a combustion device. INDUSTRIAL APPLICABILITY The present invention is particularly suitable as an improved structure of a combustion device in which two or more blowers are provided in the main body case.

[0002]

2. Description of the Related Art Combustion devices such as water heaters often have a body case. And the burner set is built in the case. Here, the burner set is an assembly in which the blower, the burner, the heat exchange portion, the exhaust pipe, and the like are integrally set. That is, in a combustion apparatus such as a water heater, a blower, a burner set in which a burner, a heat exchange section, and an exhaust pipe are integrally set are built in a main body case.

By the way, there are some household water heaters and the like in which two sets of burner sets are built in a main body case. And one burner set is used only for hot water supply,
The other burner set is used for reheating the bath (hereinafter, simply referred to as the bath).

In this type of combustion device, the air supply port of the blower is often opened in the main body case. A hole for introducing air is provided inside the main body case. Further, the main body case is provided with an exhaust port, and the exhaust tube of each burner set is connected to the exhaust port of the main body case. When the blower is activated during combustion, air flows into the main body case through the holes provided in the main body case and is sucked from the air supply ports of the respective blowers. Then, air is introduced into the burner set from each blower, and the air is supplied to the burner for combustion. The combustion gas generated by the burner passes through the heat exchange section, heats the water inside, etc., and is then discharged to the outside from the exhaust port.

[0005]

By the way, household water heaters, etc., have little noise because they are usually installed in a part facing the corridor of a condominium or in a gap between houses. is important. Here, the operation noise of the blower is one of the causes of the noise. Therefore, in order to suppress the operation noise of the blower, a device such as providing a soundproof material on the inner surface of the main body case has been devised, but the present situation is that satisfactory results have not been obtained. Therefore, the present invention focuses on the above-mentioned problems of the prior art, and aims to develop a combustion device capable of reducing the operation noise of the blower in the combustion device and performing quiet operation.

[0006]

[Means for Solving the Problems] In order to solve the above problems, the present inventors have conducted extensive research. Then, we considered cutting off the noise propagation path. However, in the course of the research, it was easy to understand from the sound quality of the noise leaking outside that the source of the noise was the blower, but the route through which the noise leaked was extremely difficult to understand. Therefore, the inventors of the present invention placed a sound insulating material and a sound absorbing material in every place in the main body case in order to find the propagation path of the noise, and compared the respective effects.

As a result, it has been found that in a water heater having two sets of burner sets for hot water supply and bath use, sound leaks to the outside through the air supply port of the blower. For example, if only the burner set on the hot water supply side is used and the bath side is stopped, only the blower on the hot water supply side is operated and the blower on the bath side is stopped (actually, the blower set on the hot water supply side is stopped. Only the high speed is operated, the blower on the bath side is often operated at low speed). However, the sound generated by the blower on the hot water supply side leaks to the outside of the blower from the air supply port of the blower on the hot water supply side. Then, this noise enters the burner set on the bath side from the air supply port of the blower on the bath side that is stopped, passes through the burner section and the heat exchange section, and leaks to the outside of the main body case from the exhaust port.

Similarly, when only the burner set on the bath side is used and the hot water supply side is stopped, the operation sound of the blower on the bath side that is operating leaks from the air supply port of the blower on the bath side, and this sound is emitted. The air supply port of the blower on the hot water supply side was picked up, reaching the exhaust port and leaking outside the case.

When both the hot water supply side and the bath side are used, the sound leaking from the air supply port of each blower is picked up by the air supply port of the other blower and reaches the exhaust port via each route, It was making noise outside the case. In addition, when both the hot water supply side and the bath side were used, it was also found that the burner part and the heat exchange part of the burner set resonated with each other and amplified the sound.

The invention according to claim 1 developed on the basis of the above-mentioned findings is a combustion apparatus in which a burner and a blower are built in a main body case, and an air supply port of the blower is opened in the main body case. The combustion device is characterized in that an obstacle is provided near the air supply port of the blower.

In the combustion apparatus of the present invention, an obstacle is provided near the air supply port of the blower. Therefore, the noise is less likely to leak from the opening of the blower, and the diffusion of the noise is prevented.
On the contrary, noise is blocked by obstacles and is hard to be picked up by the air supply port of the blower.

Further, the invention according to claim 2 developed to solve the same problem is such that a burner and two or more blowers are built in one main body case, and the air supply port of the blower is in the main body case. In the combustion device which is open at, the obstacle is provided between the air supply ports of the blowers or in the vicinity of the air supply ports of the blowers.

In the combustion apparatus of the present invention, obstacles are provided between the air supply openings of the blowers or between the air supply openings of the blowers. Therefore, noise is unlikely to leak from the openings of the blowers, and noise diffusion is prevented. On the contrary,
Since there is an obstacle between the air inlets of each blower or in the vicinity of the air inlets of each blower, the noise emitted from the other fan is blocked by the obstacles and the air blower's air inlets are blocked. Hard to be picked up by.

According to a third aspect of the present invention, in a combustion apparatus in which a burner and two or more blowers are built in one main body case, and the air supply port of the blower is opened in the main body case, the blower is Arranged in parallel, the air supply ports of each blower face in the same direction and open facing the inner wall of the main body case, and are sandwiched between the spaces projecting the air supply port of each blower on the inner wall facing each other. The combustion device is characterized in that an obstacle is provided at a position.

In the combustion apparatus of the present invention, the blowers are arranged in parallel, and the air supply ports of the blowers are oriented in the same direction and open facing the inner wall of the body case. The layout of this combustion device can reduce the outer shape of the main body case. Further, in the combustion device of the present invention, the obstacle is provided at a position sandwiched between the spaces in which the air supply ports of the blowers are projected on the facing inner walls. Therefore, noise is prevented from being diffused and picked up by the air supply port of the adjacent blower.

Further, the invention according to claim 4 is characterized in that the obstacle surrounds the extended space of the air supply port of the blower in a ring shape. Is.

In the combustion apparatus of the present invention, the obstacle surrounds the extended space of the air supply port of the blower in a ring shape. Therefore, it is possible to prevent noise from being diffused from the air supply port of the blower and being picked up by the air supply port of the blower.

Further, in the invention according to claim 5, two or more burner cases each having a built-in burner are accommodated in one main body case, and further, each of the burner cases is provided with a blower, and an air supply port of the blower is provided. In the main body case, an obstacle is provided between each combination of the burner case and the blower.

In the combustion apparatus of the present invention, an obstacle is provided between the combination of the burner case and the blower.
Therefore, in the combustion device of the present invention, resonance of the burner case or the like is prevented and noise is reduced.

According to the invention of claim 6, the blower has a fan case, the blade is housed in the fan case, and the air supply port is opened in the axial direction of the blade. The combustion apparatus according to any one of claims 1 to 5, wherein a part or the whole of the object is in a space surrounded by an inner wall facing the fan case.

In the combustion apparatus of the present invention, the obstacle is partially or wholly in the space surrounded by the inner wall facing the fan case. That is, in the combustion device of the present invention,
It is installed near the air supply port of the blower. Therefore, the combustion device of the present invention has a high effect of preventing the diffusion of noise and an effect of preventing the air supply port from picking up noise.

Further, the invention according to claim 7 is the combustion apparatus according to any one of claims 1 to 6, wherein the obstacle is hollow inside and communicates inside and outside.

In the combustion apparatus of the present invention, the inside is hollow and the inside and the outside communicate. Therefore, the obstacles adopted in the present invention do not hinder the air circulation. Therefore, according to the configuration of the present invention, the air supply resistance of the blower can be suppressed low. In order to make the inside hollow, it is recommended that the obstacle be surrounded by a plate. It is also possible to make an obstacle with a hollow inside by using a sound insulating material or a sound absorbing material.

The invention according to claim 8 is the combustion apparatus according to any one of claims 1 to 7, characterized in that the sound insulating material or the sound absorbing material is exposed on the surface of the obstacle.

In the combustion apparatus of the present invention, since the sound insulating material or the sound absorbing material is exposed on the surface of the obstacle, the sound deadening effect is further enhanced. As a structure for exposing the sound insulating material and the sound absorbing material to the surface of the obstacle, the sound insulating material is attached to the surface of the obstacle,
It is conceivable to make obstacles with sound insulating materials or sound absorbing materials themselves.

The invention according to claim 9 is the combustion apparatus according to any one of claims 1 to 8, wherein the obstacle is integral with the inner wall of the case.

The obstacle adopted in the present invention is integral with the inner wall of the case. Therefore, the vibration of the obstacle itself is suppressed.

The invention according to claim 10 is characterized in that the obstacle is formed by deforming a part of the inner wall of the case. Is.

The obstacle used in the present invention is formed by partially deforming the inner wall of the case. Therefore, the combustion device of the present invention has a small number of parts.

Further, in the invention according to claim 11, a burner and two or more blowers are built in one main body case,
In the combustion device in which the air supply port of the blower is open in the main body case, the blowers are arranged in parallel, the air supply ports of the respective blowers face in the same direction and open facing the inner wall of the main body case, Further, a pyramidal or frustum-shaped obstacle is attached to the inner wall of the main body case, and a part of the obstacle reaches the inside of each air supply port.

In the combustion apparatus of the present invention, a cone-shaped or frustum-shaped obstacle is attached to the inner wall of the main body case, and a part of the obstacle reaches the inside of each air supply port, so that sound is diffused. It is prevented and noise is reduced.

Further, in the combustion apparatus according to the twelfth aspect, a burner and two blowers are built in one main body case,
In a combustion device in which the air supply port of the blower is open in the main body case, the blower has a fan case, the blade is housed in the fan case, and the air supply port is further opened in the axial direction of the blade. The blower is provided in a position where the fan cases face each other, and the air supply ports are opened in opposite directions to each other.

In the combustion apparatus of the present invention, the blower is provided at a position where the fan cases face each other, and the air supply ports are opened in opposite directions. Therefore, in the combustion device of the present invention, the air supply ports of the blower are located back to back, and the distance between the air supply ports is long. Therefore, the noise emitted from the air supply port of one blower is hard to reach the other air supply port.

[0034]

Embodiments of the present invention will be further described below. (First Embodiment) FIG. 1 is a front view of the outer appearance of a combustion apparatus according to the first embodiment of the present invention. FIG. 2 is a front view and a side view of the inside of the combustion apparatus of FIG. 1 with a front plate removed. FIG. 3 is an exploded perspective view of the inside of the combustion apparatus of FIG. FIG. 4 is a perspective view of an obstacle of the combustion device of FIG.
FIG. 5 is a front view and a side view in which the structure of the combustion apparatus of FIG. 1 is schematically shown from the back side, and obstacles are displayed in a mesh pattern. FIG. 6 is a plan view schematically showing the structure of the combustion device of FIG. FIG. 7 is a perspective view showing a modified example of the obstacle. FIG. 8 is a perspective view showing still another obstacle and a sectional view taken along the line AA.

In the figure, reference numeral 1 shows a combustion apparatus according to an embodiment of the present invention. The combustion apparatus 1 of the present embodiment is specifically a domestic water heater having a hot water supply function and a bath function, has a main body case 2, and has two burner sets 20, 21 inside thereof. Is built in.

Explaining sequentially, the main body case 2 has a front plate 3, left and right side plates 5, 6, a back plate 7, a top plate 8 and a bottom plate 10, and a rectangular parallelepiped whose six faces are all covered. It is a box. As shown in FIGS. 1 and 3, the front plate 3 of the body case 2 has two large and small exhaust ports 1 at the top.
1, 12 are provided. Each of the exhaust ports 11 and 12 has a long hole shape and is provided side by side at the same height. The smaller exhaust port 11 provided on the left side in FIG. 1 corresponds to the burner set 20 for bath. On the other hand, the large exhaust port 12 on the right side corresponds to the burner set 21 for hot water supply. Further, a large number of air supply holes 15 are provided in the middle part of the main body case 2.

On the other hand, a baffle plate 16 is provided on the back side of the front plate 3 with a slight clearance from the front plate 3. The baffle plate 16 is on the back surface of the front plate 3 and extends from the lowermost portion to the vicinity of the upper portion of the air supply hole 15, and only the upper end portion is open. The baffle plate 16 guides the air blown from the air supply hole 15 upward and smoothes the flow of the air to the blowers 25 and 26.

Inside the main body case 2, the two sets of burner sets 20 and 21 are built in as described above. Of the two burner sets, the left side is the bath burner set 20 when viewed from the front, and the right side is the hot water supply burner set 21.

Each of the burner sets 20 and 21 is formed by integrating the blowers 25 and 26, the burner cases 27 and 28, the heat exchanger portions 30 and 31, and the exhaust tubes 35 and 36. That is, in the combustion device 1 of the present embodiment, the bath burner set 20 is provided with the blower 25 at the lowest position, and the exhaust port of the blower 25 is connected to the burner case 27. The burner case 27 has a burner (not shown) housed therein and generates a flame therein.

Further, the heat exchanger section 30 is connected to the upper portion of the burner case 27. The heat exchanger unit 30 is
The burner case 27 has a case of substantially the same size as that of the burner case 27, and a heat exchanger (not shown) is incorporated therein.
The end of the heat exchanger section 30 is connected to the exhaust stack 35. Further, the exhaust pipe 35 communicates with the exhaust port 11 of the front plate 3 described above.

The same applies to the hot water supply burner set 21, in which the blower 26 is provided at the lowest position, and the burner case 28, the heat exchanger portion 31, and the exhaust pipe 36 are sequentially attached. The exhaust pipe 36 communicates with the exhaust port 12 of the front plate 3.

In the combustion device 1 of this embodiment, the blower 2
A turbo fan, a sirocco fan, etc. are adopted in all of 5 and 26. That is, the blowers 25 and 26 adopted in the present embodiment each have a cochlear fan case 40 and 41 as shown in FIGS.
4, 45 are built in. And the wings 44 and 45 are
It is rotated by motors 46 and 47, respectively. Further, the fan cases 40 and 41 have blades 4 as shown in FIG.
Air supply ports 50, 51 are provided in the rotation axis directions of 4, 45. And in the combustion device 1 of the present embodiment, the blower 2
5 and 26 are arranged in parallel, and the air supply ports 50 and 51 of the blowers 25 and 26 are oriented in the same direction and open facing the inner wall 52 of the back plate 7 of the main body case 2.

In the combustion apparatus 1 of the present embodiment, the inner wall 52 of the back plate 7 and the air supply ports 50, 51 of the blowers 25, 26 are provided.
An obstacle 55 is provided near the space between the obstacles. The obstacle 55 has a box shape as shown in FIGS. That is, the obstacle 55 is made by bending a steel plate and has a rectangular column shape as shown in FIG. In other words, the obstacle 55 has a shape in which the front surface portion 60, the left and right side surface portions 61 and 63, and the back surface portion 62 are covered with a thin plate, and the inside is hollow and penetrates in the vertical direction. A thin sound insulating material or sound absorbing material is attached to the surface of the obstacle 55. Note that the sound insulation material and sound absorption material may be fibrous materials such as glass wool, but as for the fibrous sound insulation material, be careful that fine powder or broken pieces may be sucked into the blowers 25 and 26. is necessary. Therefore, it is desirable to adopt a flat plate-shaped material such as a urethane resin plate or a sheet as the sound insulation material or the sound absorption material. Note that similar obstacles having other configurations, which will be described later, are also attached with sound insulating materials such as urethane sheets and sound absorbing materials.

The obstacle 55 is integrally fixed to the inner wall 52 of the back plate 7 by screws (not shown) or the like. The obstacle 55 is the air supply port 5 of the blower 25, 26 as described above.
Although it is in the vicinity between 0 and 51, its mounting position is
Since it has an important meaning in the present invention, it will be described in detail. That is, for the sake of explanation, as shown in FIGS. 3, 5 and 6, the width direction of the main body case 2 is the X direction, the depth direction is the Y direction, and the vertical direction is the Z direction.
Direction. Further, in the present embodiment, since the positional relationship between the air supply ports 50, 51 of the blowers 25, 26 and the obstacle 55 is particularly important, in FIG. 3, the virtual air supply ports 50, 51 of the blowers 25, 26 are shown as virtual. The extension is indicated by a chain double-dashed line. The portions indicated by the chain double-dashed lines are spaces 65 and 66 obtained by projecting the air supply ports 50 and 51 on the inner walls facing each other. In addition, FIG.
It is the figure which represented typically the positional relationship of the air supply opening of blowers 25 and 26, and the obstacle 55. FIG. 5A shows the combustion device 1.
Is a view seen from the back side, and the left and right relationships are different from those of the other figures. The numbers attached to FIG. 5A are the same as those in the other figures. That is, members that schematically represent the same members as those in the other drawings are given the same numbers as those in the other drawings. Also, the obstacle 55 is shaded to simplify the explanation.

In the combustion apparatus 1 of the present embodiment, the obstacle 55 is assumed to have spaces 65 and 66 in which the air supply ports 50 and 51 are projected on the inner walls facing each other as shown in FIGS. It is provided at a position sandwiched between the spaces 65 and 66. That is, as shown in FIG. 6, a part of the obstacle 55 faces the front surface (the back surface when viewed from the front plate side) of the fan cases 40 and 41 of the blowers 25 and 26, but the air supply ports 50 and 51.
Has not reached to the front. In addition, the fan case 40,
There is a gap between the surface of 41 and the surface of the obstacle 55.

This will be described in terms of coordinates. In the X direction, both ends of the obstacle 55 are connected to the air supply port 5 of the blowers 25 and 26.
It is located at substantially the same position as the inner end portions of 0, 51. The difference between the two is preferably several mm. On the other hand, in the Y direction, the surfaces of the fan cases 40 and 41 and the obstacle 55
There is a gap with the surface of. If you increase the value specifically,
The gap B between the surfaces of the fan cases 40 and 41 and the surface of the obstacle 55 is about 5 to 10 mm. The distance A between the surfaces of the fan cases 40 and 41 and the inner wall is 3
It is about 0 mm to 40 mm.

Looking at the height direction (Z direction),
The obstacle 55 is longer than the length of the air supply ports 50, 51 of the blowers 25, 26 and blocks the entire length of the air supply ports 50, 51.

Next, the function of the combustion apparatus 1 of this embodiment will be described. When hot water is supplied using the combustion apparatus 1 of the present embodiment, for example, only the hot water supply burner set 21 is used for combustion. That is, when hot water is supplied, the blower 26 attached to the hot water supply burner set 21 is activated. As a result, air flows into the main body case 2 from the air supply hole 15 provided in the main body case 2, and the air is sucked from the air supply port 51 of the blower 26 on the hot water supply side. Then, the air is introduced from the blower 26 into the hot water supply burner set 21, and the air is supplied to the burner for combustion. The combustion gas generated by the burner is used for the heat exchanger section 31.
After passing through and heating the water etc. inside, it is discharged to the outside from the exhaust port 12.

In the combustion apparatus 1 of this embodiment, when only the hot water supply burner set 21 is operated, the motor sound of the hot air blower 26 causes the air supply port 51 of the blower 26.
Leaks from. However, the combustion device 1 of the present embodiment
Then, an obstacle 55 is provided between the air supply port 51 of the blower 26 that generates noise and the stopped blower 25 for the bath. Therefore, the obstacle 55 serves as a partition wall that partitions the two blowers 25 and 26 from each other, and functions as a sound shielding plate. As a result, the motor noise of the blower 26 on the hot water supply side leaks from the air supply port 51 of the blower 26, but is shielded before reaching the blower 25 on the bath side.
Attenuated. Therefore, the operating noise of the blower 25 on the hot water supply side is
It is hard to get into the blower 25 on the bath side. as a result,
The noise leaking to the outside of the body case 2 is reduced.

In particular, in the present embodiment, the obstacle 55 is provided at a position sandwiched between spaces 65 and 66 which project the air supply ports 50 and 51 onto the opposing inner walls, as shown in FIGS. Further, both ends of the obstacle 55 are located at substantially the same positions as the inner ends of the air supply ports 50, 51 of the blowers 25, 26.
In addition, in the height direction (Z direction), the obstacle 55 is longer than the length of the air supply ports 50, 51 of the blowers 25, 26 and blocks the entire length of the air supply ports 50, 51. Therefore, in the present embodiment, the obstacle 55 has a space 65, 6 in which the air supply ports 50, 51 are projected on the inner walls facing each other as shown in FIGS.
Occupies 60% or more of the position sandwiched between 6
Divide between 0 and 51. Therefore, the blower 2 on the water heater side
It is difficult for the driving sound of No. 6 to enter the blower 25 on the bath side. In the experiment conducted by the inventors, the noise of the blowers 25 and 26 was reduced by about 1 dB by providing the obstacle 55 at the above-mentioned position.

Further, in the combustion apparatus 1 of this embodiment, the obstacle 55 is sandwiched between the spaces 65 and 66 obtained by projecting the air supply ports 50 and 51 onto the opposing inner walls as shown in FIGS. The space 65, 66 provided at the position, conversely speaking, has no obstacles in the spaces 65, 66 obtained by projecting the air supply ports 50, 51 on the opposing inner walls, that is, in the present embodiment, There is no obstacle in front of the opening. Therefore, in the combustion apparatus 1 of the present embodiment, there are few obstacles to the air supply passages of the blowers 25 and 26, and the air supply resistance is the same as that of the conventional one. In addition, if an obstacle is provided in front of the opening sides of the air supply ports 50 and 51, the blower 2
It should be noted that it may increase the air supply resistance of Nos. 5 and 26 and may increase the noise. According to an experiment conducted by the present inventors, the obstacle 55 and the air supply port 5
The positional relationship of 0 and 51 and the gap between the two are such that the noise in the above-described embodiment is most effective.

In the embodiment described above, the obstacle 5
5 has a hollow inside and has a shape penetrating in the vertical direction. Therefore, the obstacle 55 used in the present embodiment allows air to flow in the vertical direction, and can be a part of the air supply passage of the blowers 25 and 26. Therefore, the air supply resistance is further reduced, which is a preferable mode. Further, as a device for lowering the air supply resistance, it is effective to provide ventilation holes 68 in the left and right side surfaces 61 and 63 and the front surface portion 60 like the obstacle 67 shown in FIG. Further, in the present embodiment, the box-shaped obstacle having a hollow inside is exemplified, but the inside may be clogged. It may be further deformed, and a part of the inner wall 52 of the back plate 7 may be convexly deformed by press working or drawing to form the obstacle 70 as shown in FIG.

(Second Embodiment) Next, a second embodiment of the present invention will be described. In the following embodiments,
The same parts as those in the previous embodiment are designated by the same numbers,
A duplicate description will be omitted. FIG. 9 is an exploded perspective view of the inside of the combustion apparatus according to the second embodiment of the present invention. FIG. 10 is a front view and a side view in which the structure of the combustion device in FIG. 9 is schematically shown from the back side, and obstacles are displayed in a mesh pattern.

In the above-described embodiment, the box-shaped obstacle is used, but the combustion apparatus shown in FIG. 9 employs the plate-shaped obstacle 71 instead. Plate-shaped obstacle 71
Is integrally attached to the inner wall 52 of the back plate 7,
It is erected vertically to the inner wall 52. As shown in FIGS. 9 and 10, the attachment position of the plate-shaped obstacle 71 is an intermediate portion between the air supply ports 50 and 51 of the blowers 25 and 26. The length of the obstacle 71 in the depth (Y direction) is longer than that of the box-shaped obstacle 55 described above, and the front end thereof reaches between the fan cases 40 and 41 as shown in FIG. . That is, in the present embodiment, the obstacle 71 is the blower 2
It shields the space between 5, 26. Also in the combustion device of the present embodiment, the noise emitted from the air supply ports 50, 51 of the one blower 25, 26 is shielded, and the other blower 2
It is hard to be picked up by the air supply ports 50, 51 of 5, 26. Therefore, the noise leaking to the outside of the main body case 2 is reduced.

(Third Embodiment) Next, a third embodiment of the present invention will be described. FIG. 11 is an exploded perspective view of the inside of the combustion apparatus according to the third embodiment of the present invention. FIG. 12 is a plan view schematically showing the structure of the combustion device of FIG.
FIG. 13 is a plan view schematically showing the structure of the combustion device, which is a modification of the combustion device shown in FIG.

In the third embodiment, the obstacle of the second embodiment described above is thickened. The obstacle 72 used in the third embodiment has a solid block shape and has a back plate 7
Is integrally attached to the inner wall 52 of the. Further, as shown in FIGS. 11 and 12, the block-shaped obstacle 72 is attached at an intermediate portion between the air supply ports 50 and 51 of the blowers 25 and 26, and the obstacle 72 has a length in the depth (Y direction). Saha
It is longer than the box-shaped obstacle 55 described above, and the front end thereof reaches between the fan cases 40 and 41 as shown in FIG. That is, in the present embodiment, the obstacle 72
Is for shielding between the blowers 25 and 26.

Although the obstacle 72 shown in FIG. 12 is solid, it may have a hollow structure as shown in FIG. Further, when the obstacle 72 has a long depth (Y direction) as in the present embodiment and the front end extends to between the fan cases 40 and 41, the ventilation hole 68 is provided as shown in FIG. It is recommended to set.

(Fourth Embodiment) Next, a fourth embodiment of the present invention will be described. FIG. 14 is an exploded perspective view of the inside of the combustion apparatus according to the fourth embodiment of the present invention. FIG. 15 is a plan view schematically showing the structure of the combustion device shown in FIG.

In the embodiment shown in FIGS. 14 and 15, two partition wall-shaped obstacles 73 are provided. In the present embodiment, the obstacle 73 is in the shape of a strip of iron, and two obstacles 73 are provided in parallel in the vertical direction. The obstacle 73 is also integrally attached to the inner wall 52 of the back plate 7. The position of the obstacle 73 is a boundary portion of the virtual extension portions of the air supply ports 50 and 51.

(Fifth Embodiment) Next, a fifth embodiment of the present invention will be described. FIG. 16 is an exploded perspective view of the inside of the combustion apparatus according to the fifth embodiment of the present invention. FIG. 17 is a front view and a side view schematically showing the structure of the combustion device of FIG. 16 in which obstacles are displayed in a hatched pattern.

In the combustion apparatus of this embodiment, the area of the obstacle 75 is considerably large. The burner set 20 for bath and the burner set 21 for hot water supply are all separated.
In the combustion device of the present embodiment, resonance between the burner cases is suppressed, and the overall noise is low. In the present embodiment, the entire burner cases are shielded from each other, but a considerable effect can be expected by partitioning only the burner cases 27 and 28. In addition, the burner cases 27, 28 and the heat exchange section 30,
You may divide 31 parts.

(Sixth Embodiment) Next, a sixth embodiment of the present invention will be described. FIG. 18 is an exploded perspective view of the inside of the combustion apparatus according to the sixth embodiment of the present invention. FIG. 19 is a front view and a side view schematically showing the structure of the combustion device of FIG. 18, in which obstacles are displayed in a shaded pattern. 20
FIG. 19 is a plan view schematically showing the structure of the combustion device in FIG. 18.

In the combustion apparatus of this embodiment, the obstacles 77,
An annular one is used for 78. That is, in FIG.
The obstacles 77 and 78 used in the embodiment of FIG. 19 are annular like donuts. Also in this embodiment, the obstacles 77 and 78 are integrally attached to the inner wall 52 of the back plate 7. The obstacles 77, 78 are blowers 25, 26
The extended space of the air supply ports 50, 51 is surrounded in a ring shape. However, the end faces of the obstacles 77 and 78 and the blower 2
There is a gap between the fan cases 40 and 41 of Nos. 5 and 26, and an air inflow passage is secured.

Also in the combustion apparatus of the present embodiment, the noise emitted from the air supply ports 50, 51 of one of the blowers 25, 26 is shielded by the annular obstacles 77, 78, and the air supply port of the other blowers 25, 26. Hard to be picked up by 50, 51. Therefore, the noise leaking to the outside of the main body case 2 is reduced.

(Seventh Embodiment) Next, a seventh embodiment of the present invention will be described. FIG. 21 is an exploded perspective view of the inside of the combustion apparatus according to the seventh embodiment of the present invention. FIG. 22 is a front view and a side view schematically showing the structure of the combustion device of FIG. 21, in which obstacles are displayed in a shaded pattern. FIG. 23 shows
FIG. 22 is a plan view schematically showing the structure of the combustion device of FIG. 21.

In the combustion apparatus of this embodiment, the obstacles 80,
81 has a conical shape or a truncated cone shape.
The obstacles 80, 81 are integrally attached to the inner wall 52 of the back plate 7. The obstacles 80, 81 have their tips inside the air supply ports 50, 51 of the blowers 25, 26. In the combustion device of the present embodiment, the obstacles 80, 81 are inside the air supply ports 50, 51 of the blowers 21, 22.
Leakage of noise from the air supply ports 50 and 51 is suppressed. Conversely, noise is prevented from entering the air supply ports 50, 51. Further, in the present embodiment, since the obstacles 80, 81 have a conical shape or a truncated cone shape, it is less likely to hinder the air supply, and the air supply resistance is not increased.

(Eighth Embodiment) Next, an eighth embodiment of the present invention will be described. FIG. 24 is an explanatory view and a side view schematically showing the structure of the eighth embodiment of the present invention.
In the combustion device of this embodiment, the blowers 25 and 26 are provided at positions where the fan cases 40 and 41 face each other, and the air supply ports 50 and 51 are opened in opposite directions. Therefore, in the combustion apparatus of the present invention, the air supply ports 50, 51 of the blowers 25, 26 are located at the centering position, and the air supply ports 50, 51 are
The distance between them is long. Further, since the fan cases 40 and 41 of the blowers 25 and 26 exist between the air supply ports 50 and 51, the air supply ports 5 and 41 are provided by the fan cases 40 and 41.
The space between 0 and 51 is divided. Therefore, the air supply port 50,
Leakage of noise from 51 is suppressed. Conversely, noise is prevented from entering the air supply ports 50, 51.

In each of the embodiments described above, the case where two independent burner sets are built in the main body case has been described as an example, but some of the components of the burner set are common. Good. For example, in the above-described embodiment, the blowers 25 and 26, the burner cases 27 and 28, the heat exchanger units 30 and 31, and the exhaust tubes 35 and 36, which are independent of each other, are provided, but some of these components are common. It may be. Specifically, the exhaust stack may be a collective type, and the combustion gas that has passed through the two heat exchanger units 30 and 31 may be collectively discharged. Further, the burner cases 27 and 28 and the heat exchanger sections 30 and 31 may be common, or the inside of one case may be partitioned. Furthermore, although the present invention has a history of being developed as an improvement of a combustion device in which two blowers are built in the main body case, there is room to utilize the present invention in a combustion device having only one blower. There is.

[0069]

As described above, according to the first aspect of the present invention, since the obstacle is provided near the air supply port of the blower, noise is unlikely to leak from the opening of the blower and the noise is diffused. Is prevented. Conversely, noise is blocked by obstacles,
It is hard to be picked up by the air supply port of the blower. Therefore, the combustion device of the present invention is quiet and quiet.

Further, the invention according to claim 2 is to improve a combustion device in which two or more blowers are built in a main body case. The invention is provided between the air supply ports of each fan or the air supply of each fan. The provision of obstacles between the mouths has the effect of preventing noise from leaking and diffusing from the openings of each blower.In addition, the noise emitted from the other blower is blocked by the obstacles to prevent the blower from feeding. It has a structure that makes it hard to pick up the air. Therefore, the combustion device of the present invention has an effect that the noise of the blower is less likely to leak to the outside of the main body case and is quiet.

Similarly, in the combustion device according to claim 3,
An obstacle is provided at a position sandwiched between spaces in which the air supply port of the blower is projected on the opposing inner wall. Therefore, the noise is prevented from being diffused and is prevented from being picked up by the air supply port of the adjacent blower. Therefore, the combustion device of the present invention is quiet, with no noise leaking to the outside of the main body case.

Further, in the combustion apparatus according to the fourth aspect, the obstacle surrounds the extended space of the air supply port of the blower in a ring shape.
Prevents noise diffusion from the air inlet of the blower and being picked up by the air inlet of the blower. Therefore, the combustion device of the present invention is quiet.

Further, in the combustion apparatus according to the fifth aspect, the obstacle is provided between the combination of the burner case and the blower. Therefore, in the combustion apparatus of the present invention, resonance of the burner case or the like is prevented, and noise is reduced.

Further, in the combustion apparatus according to the sixth aspect, since the obstacle is partially or wholly within the space surrounded by the inner wall facing the fan case, the obstacle is prevented from diffusing, and the noise is supplied. It is highly effective in preventing the mouth from picking up noise.

Furthermore, in the combustion apparatus according to the seventh aspect, the inside of the obstacle is hollow and the inside and outside communicate with each other, so that it does not hinder the air supply of the blower. Therefore, the combustion device of the present invention has an effect that noise can be reduced without affecting the air supply resistance.

Further, in the combustion device according to the eighth aspect, since the sound insulating material or the sound absorbing material is exposed on the surface of the obstacle, the sound deadening effect is further enhanced.

Further, in the combustion device according to the ninth aspect, since the obstacle is integral with the inner wall of the case, the vibration of the obstacle itself is suppressed.

Further, in the combustion apparatus according to the tenth aspect of the present invention, since the inner wall of the case is partially deformed,
It has a small number of parts and is easy to assemble.

Further, in the combustion apparatus according to claim 11,
A cone-shaped or frustum-shaped obstacle is attached to the inner wall of the main body case, and a part of the obstacle reaches the inside of each air supply port, so that sound diffusion is prevented and noise is reduced. There is.

Further, in the combustion apparatus according to the twelfth aspect, since the air supply ports of the blower are located back to back and the distance between the air supply ports is long, the noise emitted from the air supply port of one blower is different from the other. It is hard to reach the air supply port of and does not leak noise to the outside. Therefore, the combustion device of the present invention also has an effect that it can be operated quietly.

[Brief description of drawings]

FIG. 1 is a front view of the outer appearance of a combustion apparatus according to a first embodiment of the present invention.

2 is a front view and a side view of the inside of the combustion apparatus of FIG. 1 with a front plate removed. FIG.

FIG. 3 is an exploded perspective view of the inside of the combustion apparatus of FIG.

4 is a perspective view of an obstacle of the combustion device of FIG.

5A and 5B are a front view and a side view in which the structure of the combustion apparatus of FIG. 1 is schematically shown from the back side, and obstacles are displayed in a mesh pattern.

FIG. 6 is a plan view schematically showing the structure of the combustion device of FIG.

FIG. 7 is a perspective view showing a modified example of an obstacle.

FIG. 8 is a perspective view showing still another obstacle and its A-
FIG.

FIG. 9 is an exploded perspective view of the inside of the combustion apparatus according to the second embodiment of the present invention.

10 is a front view and a side view in which the structure of the combustion apparatus in FIG. 9 is schematically represented from the back side, and obstacles are displayed in a mesh pattern.

FIG. 11 is an exploded perspective view of the inside of the combustion apparatus according to the third embodiment of the present invention.

12 is a plan view schematically showing the structure of the combustion device of FIG.

FIG. 13 is a plan view schematically showing the structure of the combustion device, showing a modification of the combustion device of FIG.

FIG. 14 is an exploded perspective view of the inside of a combustion device according to a fourth embodiment of the present invention.

FIG. 15 is a plan view schematically showing the structure of the combustion device of FIG.

FIG. 16 is an exploded perspective view of the inside of the combustion apparatus according to the fifth embodiment of the present invention.

FIG. 17 is a front view and a side view schematically showing the structure of the combustion device of FIG. 16 in which obstacles are displayed in a mesh pattern.

FIG. 18 is an exploded perspective view of the inside of the combustion apparatus according to the sixth embodiment of the present invention.

FIG. 19 is a front view and a side view schematically showing the structure of the combustion device of FIG. 18, in which obstacles are displayed in a shaded pattern.

20 is a plan view schematically showing the structure of the combustion device shown in FIG.

FIG. 21 is an exploded perspective view of the inside of the combustion apparatus according to the seventh embodiment of the present invention.

22A and 22B are a front view and a side view schematically showing the structure of the combustion device of FIG. 21, in which obstacles are displayed in a mesh pattern.

23 is a plan view schematically showing the structure of the combustion device shown in FIG.

24A and 24B are an explanatory view and a side view schematically showing the structure of an eighth embodiment of the present invention.

[Explanation of symbols]

1 Combustion device 2 body case 3 front plate 7 Back plate 11,12 exhaust port 15 Air supply hole 20 bath burner set 21 Hot water supply burner set 25,26 blower 27,28 burner case 30,31 Heat exchanger part 40,41 fan case 44,45 blades 46,47 motor 52 Inner wall 55 Obstacle 65,66 Space where the air supply port is projected on the opposing inner wall 67 Obstacle 68 Vent 70 Obstacle 71 Obstacle 72 Obstacle 73 Obstacle 75 Obstacle 77,78 obstacles 80, 81 obstacles

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Keiichi Miura             93 Edo-cho, Chuo-ku, Kobe-shi, Hyogo Stock Association             Company Noritsu (72) Inventor Kei Hasegawa             93 Edo-cho, Chuo-ku, Kobe-shi, Hyogo Stock Association             Company Noritsu (72) Inventor Koji Shimomura             93 Edo-cho, Chuo-ku, Kobe-shi, Hyogo Stock Association             Company Noritsu (72) Inventor Yutaka Kawaguchi             93 Edo-cho, Chuo-ku, Kobe-shi, Hyogo Stock Association             Company Noritsu F term (reference) 3K023 AA01 HA01 HA02 HA16 HA17                       HA19 HA20                 3L036 AE23 AE31                 3L037 AA02 AB01 AC02

Claims (12)

[Claims] 1. A burner in which a burner and a blower are built in a main body case, and an air supply port of the blower is opened in the main body case, and an obstacle is provided near the air supply port of the blower. Combustion device. 2. In a combustion device in which a burner and two or more blowers are built in one main body case, and the air supply port of the blower is opened in the main body case, between the air supply ports of the respective blowers or A combustion device, wherein an obstacle is provided in the vicinity of the air supply ports of each blower. 3. In a combustion device in which a burner and two or more blowers are built in one main body case, and the air supply port of the blower is opened in the main body case, the blowers are arranged in parallel, and each blower is arranged. The air supply ports of the blowers face in the same direction and open facing the inner wall of the main body case, and an obstacle is provided at a position sandwiched between the spaces projecting the air supply ports of the blowers on the inner walls facing each other. Combustion device characterized by being. 4. The combustion device according to claim 1, wherein the obstacle surrounds an extended space of the air supply port of the blower in a ring shape. 5. A single main body case accommodates two or more burner cases each having a built-in burner. Further, each of the burner cases is provided with a blower, and an air supply port of the blower is opened in the main body case. In the existing combustion device, an obstacle is provided between each combination of the burner case and the blower. 6. The blower has a fan case, the blade is housed in the fan case, and the air supply port is opened in the axial direction of the blade, and the obstacle is a part or all of the obstacle. Is in the space surrounded by the inner wall facing the fan case, and the combustion device according to claim 1. 7. The combustion apparatus according to claim 1, wherein the obstacle is hollow inside and communicates inside and outside. 8. The combustion device according to claim 1, wherein a sound insulating material or a sound absorbing material is exposed on the surface of the obstacle. 9. The combustion apparatus according to claim 1, wherein the obstacle is integral with an inner wall of the case. 10. The combustion apparatus according to claim 1, wherein the obstacle is formed by partially deforming an inner wall of the case. 11. In a combustion device in which a burner and two or more blowers are built in one main body case, and the air supply port of the blower is opened in the main body case, the blowers are arranged in parallel, and each blower is arranged. Of the main body case are opened facing the inner wall of the main body case, and a pyramidal or frustum-shaped obstacle is attached to the inner wall of the main body case. A combustion device characterized by reaching the inside of the mouth. 12. A combustion device in which a burner and two blowers are built in one main body case, and an air supply port of the blower is opened in the main body case, the blower has a fan case, and the fan The blade is housed in the case, and the air supply port is opened in the axial direction of the blade.The blower is provided at a position where the fan cases face each other, and the air supply ports are opened in opposite directions. Combustion device characterized by being.