JPH07113448B2 - Combustion device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to noise reduction of a combustion device such as a water heater or a heater.

2. Description of the Related Art Conventionally, a combustion apparatus of this type has a structure as shown in FIG. 7 as disclosed in Japanese Patent Laid-Open No. 61-105054.

That is, the instrument main body 4 including the burner 1, the combustion chamber 2, and the exhaust fan 3 is surrounded by the front case 5 and the back case 6, and the intake port 7 for sucking air used for combustion is exposed. A case 5 is provided on the front surface of the case 5, a device body 4 composed of a burner 1, an exhaust fan 3, etc. is surrounded by a back case 6, and a partition plate 9 for covering the air supply port 7 is provided. The plate 9 was fixed, and the intake passage 10 was formed between the plate 9 and the front case 5. A control circuit for locating the outside air at the bottom of the instrument body 4 by the configuration in which this air supply passage 10 is provided.
11, it serves as a guide plate for suppressing the temperature rise of the front case 5 due to the cooling of the components in the control circuit 11 and the heat radiation from the instrument body 4 centering on the burner 1, and the rain from the intake port 7 It was intended to prevent the combustion noise generated when burning in the burner 1 part by preventing it from penetrating and hanging on the appliance main body 4 of the control circuit 11.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in such a configuration, a component cost for fixing the partition plate 9 with the mounting bracket 8 and processing and assembling costs are required, and the combustion noise generated in one burner part is 100 to 300 Hz. A low-frequency sound of a certain degree is the center, and even if the partition plate 9 is provided, there is almost no sound insulation effect, and the partition plate 9 is used to maintain combustion performance when wind blows (that is, to secure wind resistance).
Since the top, bottom, left, and right are open, the effect on noise reduction was not obtained. Further, in order to prevent the resonance of the partition plate and to improve the sound damping effect, it is necessary to increase the plate thickness of the partition plate, which increases the weight of the device. Further, since the partition plate was fixed by the mounting metal fittings, the processing and assembling cost was high.

Therefore, the first object of the present invention is to reduce the processing and assembling cost by removing the mounting fittings for positioning the partition plate.

The second purpose is to reduce the processing and assembly cost by removing the mounting bracket for positioning the partition plate.
While maintaining wind resistance and rain resistance, the noise of the fan and burner and vibration of the partition case and front case are prevented from vibrating, so that noise can be reduced and the flow of supplied air can be improved. Is to guide the device and effectively cool the equipment body and front case.

The third purpose is to reduce the processing and assembly cost by removing the mounting bracket for positioning the partition plate.
While maintaining wind resistance and rain resistance, the noise of the fan and burner and vibration of the partition case and front case are prevented from vibrating, so that noise can be reduced and the flow of supplied air can be improved. To effectively cool the equipment body and front case, and to reduce noise in a wide frequency band.

Means for Solving the Problems In order to solve the above problems, the combustion apparatus of the present invention is, firstly, a fan, a burner provided downstream of the fan, and a combustion chamber provided downstream of the burner. An instrument main body having an exhaust part having an exhaust guide provided on the downstream side of the combustion chamber and a mechanism part having a fuel supply system for supplying fuel to the burner is surrounded by a front case and a back case. A partition plate is provided between the plurality of air supply ports provided in the device and the instrument body, and an air supply passage is formed between the front case and the partition plate, and the air supply port is the front surface. The partition plate is formed by cutting and raising the inside of the case, and the partition plate is provided in contact with the raising and lowering of the air supply port.

Further, an air guide plate is provided in the air supply passage between the front case and the partition plate.

Further, the partition plate is provided with a communication port, and a plurality of expansion-type silencers composed of the front case, the partition plate, the air supply port, and the communication port are configured.

Effect With the above-described configuration, the combustion device of the present invention can easily position the partition plate by cutting and raising the air supply port, does not require a mounting bracket, and can reduce the processing and assembly cost accordingly.

Further, in the combustion apparatus of the second invention, the partition plate is provided in contact with the cut-and-raised louver of the air supply port, so that the partition plate can be easily mounted and positioned, and the mounting metal fittings are not required, thereby reducing the processing and assembly cost. Can be reduced. Furthermore, since the long air supply passage that circulates from the fan composed of the partition plate to the air supply port at the bottom of the front case has a great effect on the attenuation of the propagation distance length, the noise finally radiated from the air supply port. Is significantly reduced. Further, since the partition plate acts as a sound insulation plate, the sound of high frequency components is reduced. Furthermore, by providing an air guide plate in the air supply passage between the partition plate and the front case, the rigidity of the partition plate and the front case can be increased, and the partition plate and the front plate due to noise and vibration generated by the fan and burner can be increased. Resonance of the case can be suppressed. In addition, the air supplied from the air supply port is guided by the air guide plate, and the air guide plate acts as a fin to promote heat exchange. Effective cooling can be performed.

Further, in the combustion device of the third invention, by providing the partition plate in contact with the louver cut and raised at the air supply port, the partition plate can be easily mounted and positioned, and mounting brackets are not required, which reduces processing and assembly costs. can do. In addition, the long air supply path that detours from the fan configured by the partition plate to the air supply port at the bottom of the front case has a great effect on the attenuation of the propagation distance length, so that the noise radiated from the air supply port is greatly reduced. Is reduced to. Further, since the partition plate acts as a sound insulation plate, the sound of high frequency components is reduced. By providing the air guide plate in the air supply passage between the partition plate and the front case, the rigidity of the partition plate and the front case can be increased, and the partition plate and the front case can be prevented by noise and vibration generated by the fan and burner. Resonance of the case can be suppressed. In addition, the air supplied from the intake port is guided by the air guide plate, and the air guide plate acts as a fin to promote heat exchange. Cooling can be performed. Furthermore, the expansion type silencer, which has the air inlet and the communication port provided in the partition plate as the throttle, is divided into a plurality of parts by the air guide plate, so that noises having different frequencies can be silenced and a wide range can be achieved. Noise in the frequency band can be reduced.

Embodiment Hereinafter, a case where one embodiment of the present invention is applied to a water heater will be described with reference to the accompanying drawings.

1 and 2, the burner 1 is provided on the downstream side of the fan 12, and the exhaust chamber 14 having the combustion chamber 2, the heat exchanger 20 and the exhaust duct 21 is provided on the downstream side of the burner 1, respectively. It is connected. The burner 1 is connected to a mechanism section 16 having a fuel connection port 29 for adjusting the flow rate of fuel according to the load. Further, a water pipe 24 is connected to the water supply connection port 22 from a water mechanical unit 23 that adjusts the water pressure and the amount of water to the heat exchanger 20. Further, the heat exchanger 20 to the hot water supply connection port 25 are similarly connected by a hot water supply pipe 26. The instrument body 4 is
It is housed in the back case 6 together with the electrical equipment box 27.

On the other hand, in the lower part of the front case 5, a plurality of air supply openings 17 with cut-out inside are provided, and the partition positioned so as to cover the air supply openings 17 and come into contact with the air supply openings 17 with glass. A plate 9 is attached to form an air supply passage 10 with the front case 5, and a frame 28 for projecting an exhaust duct 21 is provided above the front case 5. Front case 5 is back case 6
Is joined to seal the instrument body 4 and also form an air supply passage 10 between the partition plate 9 and the instrument body 4.

Next, the operation of the configuration of this embodiment will be described. The air required for combustion flows into the lower portion of the front case 5 through the air supply port 17. Most of the inflowing air is guided upward through the air supply passage 10, bypasses the upper end of the partition plate 9, and flows into the air supply passage 10. These air is supplied to the burner 1 by the fan 12.
Is supplied to. Further, the amount of fuel supplied from the fuel connection port 29 is guided to the burner 1 by the mechanism portion 14 according to the load. Fuel and air are burned in the combustion chamber 2 by the burner 1 and become high-temperature gas to reach the heat exchanger 20. Heat exchanger 20
The combustion gas, which has been deprived of heat by the exhaust gas and has become low-temperature exhaust gas, is collected in the exhaust unit 14 and released to the atmosphere through the exhaust duct 21.
On the other hand, enter from the water supply connection port 22 to the water mechanical part 23 to the water pipe 24.
The water that has passed through and is supplied to the heat exchanger 20 is heated by the combustion gas to become hot water, passes through the hot water supply pipe 26, and is supplied from the hot water supply connection port 25 to a predetermined location. The fan 12 is controlled by the control circuit 11 in the electrical equipment box 27 according to the load.

On the other hand, the noise of the equipment is mainly low frequency emitted from the exhaust guide 13 and medium high frequency emitted from the suction port of the fan 12 through the intake port 17, and the latter sound is surrounded by the front case 5 and the back case 6. Diffuses in the space, propagates in the air in a path opposite to the flow, and is radiated to the outside from the air supply port 17. Further, when installed outdoors and against wind and rain, the rain first enters through the feeder port 17, but the partition plate 9 that is in close contact with the periphery of the front case 5 prevents the appliance body 4 from being affected. . The wind blows not only from the front but also from each direction, but since there are multiple air supply ports 17 around the front case 5, a pressure balance can be obtained against wind from any direction. , Deterioration of combustion performance is prevented. The air supply port 17 provided is
The gallery is bent down inside the case, and positioning and fixing can be performed by contacting the partition plate 9 with the gallery, and the processing and assembly cost can be reduced by reducing the number of members.

In the embodiment shown in FIGS. 3 and 4, the burner 1 provided on the downstream side of the fan 12, the combustion chamber 2 provided on the downstream side of the burner 1, and the heat exchange provided on the downstream side of the combustion chamber 2. An exhaust unit 14 having an air 20 and an exhaust duct 21 provided on the downstream side of the heat exchanger 20.
Are connected to each other. The burner 1 is provided with a mechanism section 16 having a fuel connection port 29 for adjusting the fuel flow rate according to the load, and the fan 12, the burner 1, the combustion chamber 2, the exhaust section 14, and the mechanism section 16 are front cases. It is surrounded by 5 and the back case 6. On the other hand, a plurality of air supply ports 17 are provided on a plurality of wall surfaces below the front case 5, and the lower side and both side sides of the front case 5 are brought into close contact with each other between the air supply ports and the main body of the appliance, so that the fan 12 By providing the partition plate 9 so as to cover the burner 1 and the air supply port 17 with a rattle provided in the lower part of the front case 5, the upper end of the partition plate 9 from the air supply port 17 is bypassed and the fan 12 The air supply passage 10 leading to the table case 5 and the partition plate 9, and guiding the flow of the supplied air into the air supply passage 10 formed between the front case 5 and the partition plate 9. The air guide plate 18 for suppressing the vibration of the plate 9 is attached to the partition plate 9
The air guide plate 18 has such a size that the height of the air supply passage 10 is determined.

In this embodiment, since the partition plate is provided in contact with the louver in which the air supply port is cut and raised, the partition plate can be easily mounted and positioned, and the mounting metal fitting is not required, so that the processing and assembling cost can be reduced. Further, since the partition plate 9 forms the long air supply passage 10 from the fan 12 formed to the air supply port 17 at the lower part of the front case 5, the damping effect due to the propagation distance length acts greatly, so that the supply air is finally supplied. The noise radiated from the air outlet 17 can be significantly reduced. Further, since the partition plate 9 is provided so as to cover the fan 12 and the burner 1, the partition plate 9 acts as a sound insulation plate, so that high frequency noise can be reduced. Further, the air guide plate 18 is provided as a passage for air supply between the partition plate 9 and the front case 5.
By providing the partition plate 9 and the front case 5 in the inside 10, the rigidity of the partition plate 9 and the front case 5 can be increased, and the partition plate 9 and the front case 5 can be generated by noise and vibration generated by the fan 12 and the burner 1.
Resonance can be suppressed. Further, the air supplied from the air supply port 17 is guided by an air guide plate 18, and the air guide plate 18 functions as a fin to promote heat exchange. Also, the instrument body 4 can be effectively cooled. Similarly, since the air supplied from the air supply port 17 is preheated, the combustion efficiency of the burner 1 can be improved. Also,
For wind and rain when installed outdoors, first the rain enters through the air supply port 17, but the partition plate 9 that is closely attached to the periphery of the front case 5 is used.
As a result, the influence on the instrument body 4 is prevented. The wind blows not only from the front but also from each direction, but since there are multiple air supply ports 17 around the front case 5, a pressure balance can be obtained against wind from any direction. , Deterioration of combustion performance is prevented.

In the embodiment shown in FIGS. 5 and 6, the burner 1 provided on the downstream side of the fan 12, the combustion chamber 2 provided on the downstream side of the burner 1, and the heat exchange provided on the downstream side of the combustion chamber 2. Unit 20 and an exhaust unit 14 having an exhaust duct 21 provided on the downstream side of the heat exchanger 20.
Are connected to each other. The burner 1 is provided with a mechanism section 16 having a fuel connection port 29 for adjusting the fuel flow rate according to the load, and the fan 12, the burner 1, the combustion chamber 2, the exhaust section 14, and the mechanism section 16 are front cases. It is surrounded by 5 and the back case 6. On the other hand, a plurality of air supply ports 17 are provided on a plurality of wall surfaces below the front case 5, and the lower side and both side sides of the front case 5 are brought into close contact with each other between the air supply ports and the main body of the appliance, so that the fan 12 By providing the partition plate 9 so as to cover the burner 1 and the air supply port 17 provided with a louver provided in the lower part of the front case 5, the upper end of the partition plate 9 is bypassed from the air supply port 17 to the fan 12. A supply air passage 10 is formed, and a flow of supplied air is guided into the air supply passage 10 formed between the front case 5 and the partition plate 9, and the front case 5 and the partition plate are also guided. The partition plate 9 is provided with an air guide plate 18 for suppressing the vibration of the air guide plate 9. The air guide plate 18 has a size such that the height of the air supply passage 10 is determined, and air is guided by the air guide plate 18. A communication port 19 is provided in the partition plate 9 on the downstream side.

In this embodiment, the partition plate is provided in contact with the cut-and-raised louver of the air supply port, so that the partition plate can be easily mounted and positioned, and mounting brackets are not required, so that the processing and assembling cost can be reduced. Furthermore, since the long air supply passage 10 is formed from the fan 12 constituted by the partition plate 9 to the air supply port 17 at the lower part of the front case 5, the damping effect due to the propagation distance length is greatly exerted. The noise radiated from the mouth 17 can be greatly reduced. In addition, a partition plate 9 covers the fan 12 and the burner 1.
Since the partition plate 9 is provided, the partition plate 9 acts as a sound insulating plate, and thus high-frequency noise can be reduced. Further, the air guide plate 18 is provided between the partition plate 9 and the front case 5 so that the air supply passage 10 is provided.
The partition plate 9 and the front case 5 are provided inside.
The rigidity of the partition plate 9 and the front case 5 due to noise and vibration generated by the fan 12 and the burner 1 can be suppressed. Further, the air supplied from the air supply port 17 is guided by an air guide plate 18, and the air guide plate 18 acts as a fin to promote heat exchange. 5 and instrument body 4
Can be effectively cooled. Similarly, since the air supplied from the air supply port 17 is preheated, the burner 1
It is possible to increase the combustion efficiency of the combustion performed by further,
By forming a plurality of expansion type silencers, each of which has the communication port 19 provided in the air supply port 17 and the partition plate 9 as a throttle portion, is divided by the air guide plate 18, it is possible to muffle noises having different frequencies. The noise can be reduced in a wide frequency band. Further, with respect to wind and rain when installed outdoors, the rain first infiltrates through the air supply port 17, but the partition plate 9 that is in close contact with the periphery of the front case 5 prevents the appliance body 4 from being affected. . The wind blows not only from the front but also from each direction, but since multiple air supply ports 17 are provided around the front case 5, pressure balance can be obtained against wind from any direction. The deterioration of combustion performance can be prevented.

Effects of the Invention As described above, according to the combustion device of the present invention, the following effects are obtained.

In the combustion device of the present invention, the partition plate can be easily positioned by cutting and raising the air supply port, and mounting fittings are not required. Therefore, the processing and assembling cost can be reduced more than before.

Further, in the combustion apparatus of the second invention, the partition plate is provided in contact with the cut-and-raised louver of the air supply port, so that the partition plate can be easily mounted and positioned, and the mounting metal fittings are not required, thereby reducing the processing and assembly cost. Can be reduced. Furthermore, since a long air supply passage is formed from the fan configured by the partition plate to the air supply port at the bottom of the front case, the damping effect due to the propagation distance length acts greatly.
Finally, the noise emitted from the air supply port can be significantly reduced. Further, since the partition plate is provided so as to cover the fan and the burner, the partition plate acts as a sound insulating plate, so that high frequency noise can be reduced. Further, by providing the air guide plate in the air supply passage between the partition plate and the front case, the rigidity of the partition plate and the front case can be increased, and the partition plate and the front case can be prevented from generating noise and vibration. The resonance of the front case can be suppressed. In addition, the air supplied from the air supply port is guided by the air guide plate, and the air guide plate acts as a fin to promote heat exchange. Effective cooling can be performed.
Furthermore, for wind and rain during outdoor installation, rain first enters through the air supply port, but the partition plate provided on the front case prevents rainwater from entering the apparatus body. Also, the wind blows not only from the front but from each direction,
Since the plurality of air supply ports are provided in the plurality of side walls below the front case, a pressure balance can be obtained against wind from any direction, so that deterioration of combustion performance can be prevented.
Therefore, it is possible to significantly reduce noise while maintaining rain resistance and wind resistance.

Further, in the combustion device of the third invention, by providing the partition plate in contact with the louver cut and raised the air supply port, the partition plate can be easily mounted and positioned, and the mounting bracket is not required, which reduces the processing and assembly cost. can do.
Further, by providing the air guide plate in the air supply passage between the partition plate and the front case, the rigidity of the partition plate and the front case can be increased, and the partition plate and the front case can be prevented from generating noise and vibration. The resonance of the front case can be suppressed. In addition, the air supplied from the air supply port is guided by the air guide plate, and the air guide plate acts as a fin to promote heat exchange, thereby promoting the heat exchange. Effective cooling can be performed. Similarly, since the air supplied from the air supply port is preheated, the combustion efficiency of the combustion performed by the burner can be increased. Furthermore, the expansion type silencer, which has the air inlet and the communication port provided in the partition plate as the throttle, is divided into a plurality of parts by the air guide plate, so that noises having different frequencies can be silenced and a wide range can be achieved. Noise in the frequency band can be reduced. Further, with respect to wind and rain when installed outdoors, the rain first enters through the air supply port, but the partition plate provided on the front case prevents rainwater from entering the appliance body. The wind blows not only from the front but from each direction, but since there are multiple air supply ports on the multiple side walls below the front case, pressure balance can be obtained against wind from any direction. Therefore, deterioration of combustion performance can be prevented. Therefore, it is possible to significantly reduce noise while maintaining rain resistance and wind resistance.

[Brief description of drawings]

FIG. 1 is an external perspective view of a gas water heater provided with an apparatus according to an embodiment of the present invention with a front case removed, and FIG.
FIG. 3 is a side view of a front main part showing another embodiment, FIG. 4 is an external perspective view showing the same case without the table, FIG. 5 is a sectional view of a front main part showing another embodiment, and FIG. FIG. 7 is an external perspective view of the same case with the case removed, and FIG. 7 is a sectional view of a conventional example. 1 ... Burner, 2 ... Combustion chamber, 4 ... Instrument body, 5 ...
Front case, 6 ... Back case, 9 ... Partition plate, 10 ... Air supply passage, 12 ... Fan, 13 ... Exhaust guide, 14 ... Exhaust section, 15 ... Fuel supply system, 16 ... Mechanical part, 17 ... Air inlet with cut and raised grate, 18 ... Air guide plate, 19 ... Communication port.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Tomonori Aso 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References: 62-52743 (JP, U) 40948 (JP, U) Actually opened 61-79745 (JP, U)

Claims (3)

[Claims] 1. A fan, a burner provided on the downstream side of the fan, a fuel chamber provided on the downstream side of the burner, and an exhaust section having an exhaust guide provided on the downstream side of the fuel chamber. An instrument main body provided with a mechanism portion having a fuel supply system for supplying fuel to the burner is surrounded by a front case back case, and a partition is provided between the plurality of air supply ports provided in the front case and the instrument main body. A plate is provided, and an air supply passage is formed between the front case and the partition plate, and the air supply port is
A combustion device, which comprises a louver cut and raised inward of the front case, and the partition plate is provided in contact with the cut and raised of the air supply port. 2. The fuel system according to claim 1, wherein an air guide plate is provided in the air supply passage between the front case and the partition plate. 3. A combustion apparatus according to claim 2, wherein the partition plate is provided with a communication port, and a plurality of expansion type silencers are constituted by the front case, the partition plate, the air supply port and the communication port.