JP2602407Y2 - Combustion equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wall-mounted combustion device suitable for a water heater or a hot-water bath.

[0002]

2. Description of the Related Art FIGS. 4 and 5 show a perspective view and a sectional view of a conventional combustion apparatus.

[0003] This combustion apparatus comprises a silencer 9 and an exterior 1 for accommodating a combustion section.
And a combustion chamber 5, a heat exchanger 6, an exhaust chamber 7, and a blower 8. The exterior 1 has an air supply port 10 for introducing combustion air.

Then, fuel is injected from the nozzle 2 into the burner 3, and combustion air is introduced into the burner chamber 4 from the air supply port 1 of the exterior 1 located outside by the blower 8. The fuel gas is mixed in advance with a part of the combustion air, and blows out from the flame opening of the burner 3 into the combustion chamber 5 to form a primary flame.

[0005] Further, a secondary flame is formed by the combustion air supplied from around the burner 3 and complete combustion occurs.
The high-temperature combustion gas generated by the combustion enters the heat exchanger 6, where it heats the fluid to be heated.

Then, the combustion gas whose temperature has decreased becomes exhaust gas, passes through the exhaust passage inside the exhaust chamber 7 and the silencer 9, and is discharged from the exhaust port 12 to the outside.

Most of the noise from such a combustion device passes through the heat exchanger 6, the exhaust chamber 7, and the silencer 9,
The gas is discharged to the outside from the exhaust port 12 or through the surface of the silencer 9 or the like. Further, a part is transmitted through the back of the combustion chamber 5 and the exterior 1 and is discharged to the outside.

[0008]

Hitherto, noise reduction has been mainly performed only for noise generated by combustion.
When it is difficult to change the structure inside the combustion device, the provision of the silencer 9 has been taken as a countermeasure as in the conventional example.

Therefore, the silencer 9 is inevitably mounted near the outlet of the exhaust chamber 7, and its size is designed so as not to be too large with respect to the dimensions of the main body.

[0010] However, with the increase in capacity of the combustion apparatus and high load combustion, it is necessary to secure a large amount of combustion air.
The load on the blower 8 increases, and the noise of the blower 8 also tends to increase.

In particular, the noise of the blower 8 is high in the high frequency range, and the noise is emitted from the air inlet 1 rather than from the air outlet 12.
It is released from 0, and in the conventional silencer 9,
Such noise cannot be reduced sufficiently.

Also, it is difficult to change the position of the air supply port 10 due to the installation conditions.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a combustion device capable of sufficiently reducing noise without changing the structure inside the combustion device.

[0014]

In order to achieve the above object, a combustion device according to the present invention has a size of a silencer,
Extend to the same level as the rear of the exterior, open the back of the silencer and the rear of the exterior, and provide a sound absorbing material so that the exhaust passage of the silencer and the interior of the exterior do not communicate with each other. In both cases, the sound absorbing material is brought into contact.

Further, even when the size of the silencer is smaller than the rear surface of the exterior, the sound absorbing material in the silencer may be brought into contact with the interior space of the exterior.

In order to prevent the exhaust gas from flowing into the exterior from the exhaust passage, a partition plate may be inserted inside the sound absorbing material.

[0017]

As apparent from the above configuration, since the sound absorbing material inside the silencer can come into contact with the space inside the exterior on the combustion section side, not only the noise passing through the exhaust flow path inside the silencer but also the inside of the exterior can be obtained. Can be absorbed by this sound absorbing material, and in particular, the noise of the blower can also be reduced.

[0018]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a combustion apparatus according to the present invention.

FIG. 1 is a perspective view showing a silencer used in the combustion apparatus according to the present invention, and FIGS. 2 and 3 show an embodiment in which the combustion apparatus according to the present invention is applied to a water heater. Is basically the same as that of the conventional combustion apparatus shown in FIGS.

When the combustion device according to the present invention is applied to a bathtub with hot water supply, the combustion device is installed inside the exterior.
You just have to stand side by side.

The object to be heated is water in both the hot water heater and the hot water bath.

1 and 2, the combustion device according to the present invention will be described. The combustion device according to the present invention includes an exterior 1 and a silencer 9, and the exterior 1 accommodates a burner 3 therein. Burner chamber 4, combustion chamber 5,
It comprises a heat exchanger 6, an exhaust chamber 7, and a blower 8, and the back of the exterior 1 is open.

Also in the silencer 9, a U-shaped exhaust passage 15 is formed by the silencer partition 13 and the sound absorbing material 11.
, But the back surface 14 is open.

Further, the sound absorbing material 11 is set so that the exhaust passage 15 of the silencer 9 does not communicate with the inner space 16 of the exterior 1.

Therefore, the exhaust passage 15 of the silencer 9
Not only that, since the sound absorbing material 11 is in contact with the outer space 16, noise in the outer material 1, particularly noise emitted from the blower 8 to the outside through the air supply port 10, can be effectively reduced by the sound absorbing material 11. Sound can be absorbed, and noise inside the combustion device can be significantly reduced.

Further, since it is possible to prevent the noise of the blower 8 from being emitted to the outside, it is possible to cope with an increase in the size of the blower 8.

Next, FIG. 3 shows another embodiment of the combustion apparatus according to the present invention, in which the silencer 9 is extended downward, the internal structure of the silencer 9 is the same as that of the conventional one, and the lower part is filled with the sound absorbing material 11. In this portion, the sound absorbing material 11 is also brought into contact with the exterior interior space 16.

Also in this case, the sound absorbing material 11 provided at the lower part can sufficiently absorb the noise inside the exterior 1 and can greatly reduce the noise of the combustion device.

Further, even when the size of the silencer 9 is smaller than the back surface 14 of the exterior 1 as in the conventional example, the sound absorbing material 11 in the silencer 9 and the interior space 16 may be similarly contacted.

In order to prevent the exhaust gas from flowing from the exhaust passage 15 into the exterior 1, a partition plate may be provided inside the sound absorbing material 11.

[0031]

[Effects of the Invention] As described above, the combustion device according to the present invention is composed of a silencer and an exterior, extends the size of the silencer until it becomes the same as the exterior rear, and opens both the silencer rear and the exterior rear. Since the sound absorbing material on the back is in contact with the space inside the exterior, not only the noise passing from the exhaust chamber side through the exhaust flow path inside the silencer but also the noise inside the exterior can be sufficiently absorbed, especially for the blower. Noise can be reduced, and the level of noise emitted from the air supply port of the exterior can be significantly reduced.

Further, even if the load on the blower increases, the noise level can be reduced without changing the structure of the combustion section, so that it is possible to achieve both high capacity and high load of the blower.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a sun lancer used in a combustion device according to the present invention.

FIG. 2 is a sectional view showing the configuration of an embodiment of the combustion device according to the present invention.

FIG. 3 is a sectional view showing the configuration of another embodiment of the combustion apparatus according to the present invention.

FIG. 4 is a perspective view of a conventional combustion device.

FIG. 5 is a cross-sectional view showing a configuration of a conventional combustion device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Exterior 2 Nozzle 3 Burner 4 Burner room 5 Combustion chamber 6 Heat exchanger 7 Exhaust chamber 8 Blower 9 Silencer 10 Air supply port 11 Sound absorbing material 12 Exhaust port 13 Silencer partition 14 Silencer back surface 15 Exhaust flow path 16 Exterior interior space

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masanori Ueda 1500 Ogawa, Oaza, Shimodate City, Ibaraki Prefecture Hitachi Chemical Co., Ltd. Shimodate Research Laboratory (56) References JP-A-1-277109 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) F23J 13/00

Claims (1)

(57) [Scope of request for utility model registration] A combustion section comprising a burner chamber for accommodating a burner, a combustion chamber, a heat exchanger, an exhaust chamber, and a blower is installed inside the exterior, and an exhaust port from an exhaust chamber outlet to an exhaust port on the back of the exterior. One or more silencer partitions having a U-shaped exhaust flow path up to
In a through-wall mounted combustion device provided with a silencer having a structure in which one or all surfaces are in contact with the sound absorbing material, the silencer rear surface and the exterior rear surface are both opened,
A combustion device, wherein a sound absorbing material is provided so that an exhaust passage of a silencer and a space inside an exterior do not communicate with each other, and both the exhaust passage and the space inside the exterior are in contact with the sound absorbing material.