JPH09303763A - Combustion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot water supplying device as a combustion device, which can suppress a noise generating during a cold period of winter even with an initial ignition, to a comparatively low degree. SOLUTION: In order to constitute this combustion device which is equipped with a combustion chamber 2 being equipped with a burner 3, and is also equipped with a burner control device 10 which can freely ignite and extinguish the burner 3, a burner combustion sound detecting mechanism which detects a burner combustion sound volume generating from the combustion chamber 2 under a state wherein the burner 3 is burning, is provided. When a burner combustion sound volume being detected by this burner combustion sound detecting mechanism, is larger than a sound volume which is set in advance, the burner is extinguished for one time by the burner control device 10, and in addition, a re-ignition means 12 which re-ignites the burner, is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology for silencing a combustion device equipped with a burner inside a combustion chamber and a burner control device capable of freely igniting and extinguishing the burner.

[0002]

2. Description of the Related Art In such a combustion device, the noise generated is a problem. The types of noise in question include noise generated when the combustion device is operating steadily, and noise generated during ignition. And
Conventionally, optimization of the burner shape and combustion chamber shape, and further combustion control have been performed with the problem of noise generated during steady operation.

[0003]

However, for example, when a water heater is taken as an example, there is a problem that a large noise is likely to be generated at the time of ignition. That is, for example, the water heater emits a relatively high sound when it is ignited for the first time in the cold morning of winter. Furthermore, this audible noise is for a relatively long time,
This tends to occur when the water heater is in a stopped state and the device is cold. Then, once a relatively high audible noise is generated at the time of ignition, there is a problem that this high audible noise is likely to continue as it is. Here, the sounding in this case is higher than the noise generated from the water heater in the daytime in summer, for example, and a constant noise generation state is easily maintained continuously in a cold environment, for example. It is considered to be a thing. Therefore, an object of the present application is to eliminate the above problems.

[0004]

[Means for Solving the Problems]

[Composition] According to the present invention for achieving this object, a combustion apparatus having a burner according to claim 1 is provided, and a characteristic configuration of a combustion apparatus having a burner control device capable of igniting and extinguishing the burner is as follows. It is as follows. That is, while the burner is burning, a burner combustion sound detection mechanism for detecting the burner combustion sound volume generated from the combustion chamber is provided, and the burner combustion sound volume detected by this burner combustion sound detection mechanism is preset. When the volume is higher than the specified level, the burner controller temporarily extinguishes the burner and then re-ignites the burner. [Operation / Effect] It is considered that the noise generated from such a combustion device is due to the turbulent state of the gas flow in the combustion device, and the occurrence state of this turbulent state becomes a problem.
Here, this turbulence is governed by the magnitude of the initial disturbance at the time of gas ignition, for example. That is, when the initial disturbance is large, it may occur for a long time while the turbulence is relatively large. On the other hand, when the initial disturbance is small, this turbulence converges with the operation of the device, and the turbulence is reduced to a large level and the large noise state is not maintained. This corresponds to a case where the influence of disturbance on the control system is considered. Now, under such consideration, the subject of the present application is, for example,
Comparing the noise generated when the water heater is operating in a cold environment in winter with the noise generated when the water heater is operating in a relatively warm environment in the summer and in the combustion state, the temperature of the gas in the combustion chamber is compared. Is low, the kinematic viscosity coefficient is small and the Reynolds number Re is large. Therefore, when ignition is performed in such a situation, the initial disturbance that occurs is considered to be relatively large. Therefore, with respect to noise, a turbulent state induced by this initial disturbance is maintained, and a situation occurs in which the noise does not disappear. Here, regarding the initial disturbance, the temperature state in the combustion chamber has been described, but, for example, a temporary closed state may occur, and strong turbulence may temporarily occur. Therefore, the apparatus is provided with a burner combustion noise detection mechanism, which detects the burner combustion noise generated from the combustion chamber in the burner combustion state. Then, this volume is compared with a preset volume, and when the detected volume is high, the re-ignition means operates and the burner control device extinguishes and re-ignites the burner.
In this case, re-ignition is performed in a state where the inside of the combustion chamber is relatively warm, regardless of the initial disturbance that causes high noise. Therefore, the re-ignition operation is not performed with a large initial disturbance due to the environmental temperature, and the combustion device can be operated in a relatively low noise state. As a result, it was possible to obtain a combustion device capable of operating with relatively low noise.

[Structure / Operation / Effect] In the above-mentioned embodiment, it is preferable that the re-ignition means is configured to operate when the burner is initially ignited. In the example described above, the type of initial disturbance is not limited, but if a large amount of noise is being generated, a constant turbulent state continues, so this continuous state is temporarily suspended. Further, the combustion device is operated in a state where the initial disturbance is relatively small after being cut off. However, as explained in the challenges section,
The representative of the noise that the present application is concerned with is the environmental conditions (temperature conditions) in which the combustion device is placed, and when ignition operation is performed in a cold state, continuous high noise is likely to occur. Therefore, if the operation by the re-ignition means is performed in cooperation with the initial ignition in accordance with the noise generating condition described above, it is possible to obtain a combustion device with low noise. [Structure] According to the present invention for attaining the object of the present application described above, a combustion apparatus having a combustion chamber having a burner according to claim 3 and having a burner control device capable of igniting and extinguishing the burner is provided. The characteristic configuration is as follows. That is, while the burner is burning, a combustion chamber wall vibration detection mechanism that detects the vibration of the combustion chamber wall that constitutes the combustion chamber is provided, and the vibration detected by this combustion chamber wall vibration detection mechanism is When the vibration is larger than the set vibration, the burner controller temporarily extinguishes the burner, and then reignition means for reigniting the burner is provided. [Operation / Effect] Since the mechanism of noise prevention in the combustion device is almost the same as that described above, description thereof will be omitted. However, in this structure, the turbulent state of the gas in the combustion chamber is detected as the vibration of the combustion chamber wall, and the noise is prevented. Therefore, the device
The combustion chamber wall vibration detection mechanism is provided, and this mechanism detects the vibration generated in the combustion chamber wall in the burner combustion state. Then, this vibration (magnitude of vibration (amplitude)) is compared with preset vibration (magnitude of vibration (amplitude)), and when the detected vibration is large, the re-ignition means operates to perform burner control. The device extinguishes and reignites the burner.
In this case, the above-mentioned mechanism can ensure the operation in the low noise generation state. As a result, it was possible to obtain a combustion device capable of operating with relatively low noise.

[Structure / Operation / Effect] In the above-mentioned embodiment, it is preferable that the re-ignition means is configured to operate when the burner is initially ignited. Also in this case, the operation by the re-ignition means in cooperation with the initial ignition,
If the above-mentioned noise generation condition is followed, the combustion device that generates a low noise can be obtained.

[Structure / Operation / Effect] In the above-described combustion apparatus according to claim 1, the volume of the burner combustion sound is detected. However, such a burner combustion sound is detected in a specific frequency band. It has the property of being present. Therefore, the sound of this specific frequency can be detected and used as a criterion for determining whether or not reignition is required. In this case, the combustion device will be configured as follows. This configuration relates to claim 5. That is, a combustion chamber with a burner is provided,
In order to configure a combustion device equipped with a burner control device capable of igniting and extinguishing this burner, the burner combustion that detects the volume of a preset frequency band generated from the combustion chamber while the burner is burning In addition to the sound detection mechanism, when the sound volume detected by the burner combustion sound detection mechanism is higher than a preset sound volume, the burner control device temporarily extinguishes the burner and further includes re-ignition means for reigniting the burner. is there. With this configuration, the noise generated by the combustion device can be reduced by the same action as described above, using the detection value of the sound in the preset frequency band as a trigger. Further, also in the case of this configuration, it is preferable that the re-ignition means is configured to operate when the burner is initially ignited, so that the above-described actions and effects can be obtained. [Structure / Operation / Effect] In the combustion device according to the third aspect described above, vibration is detected. However, capturing the vibration caused by the burner combustion noise leads to a reliable noise reduction. Therefore, it is necessary to re-ignite the vibration of this specific frequency by capturing the vibration of the specific frequency band.
It can also be a non-judgment standard. In this case, the combustion device will be configured as follows. This configuration relates to claim 7. That is, a combustion chamber with a burner is provided,
To configure a combustion device with a burner control device that can ignite and extinguish the burner, detect the vibration of a preset frequency band of the combustion chamber wall that constitutes the combustion chamber when the burner is burning. When the vibration detected by the combustion chamber wall vibration detection mechanism is larger than the preset vibration, the burner controller once extinguishes the burner and re-ignites the burner again. The ignition means is provided. With this arrangement, the vibration detection value in the preset frequency band is used as a trigger to reduce the noise generated by the combustion device by the same action as above. Further, also in the case of this configuration, it is preferable that the re-ignition means is configured to operate when the burner is initially ignited, so that the above-described actions and effects can be obtained.

BEST MODE FOR CARRYING OUT THE INVENTION The structure of a water heater 1 as an example of a combustion apparatus having the characteristic configuration of the present invention will be described below with reference to FIG.
It will be described based on. As shown, this water heater 1
Is provided with a burner 3 inside the combustion chamber 2, and is provided with a heat exchanger 4 on the exhaust side of the burner 3 through which water to be heated flows. A water supply passage 40 is provided for the heat exchanger 4, and the water supply passage 40 is provided with a water supply amount control valve 4a and a water supply temperature detection mechanism 4b. Further, a hot water outlet passage 41 provided on the lower side of the heat exchanger 4 is provided with a hot water outlet temperature detecting mechanism 4c for detecting the hot water outlet temperature. Further, a blower 5 for supplying primary air and secondary air is provided on the base end side of the combustion chamber 2. On the other hand, on the base end side of the burner 3, a plurality of valves 6 (a gas governor proportional valve 6a, a main solenoid valve 6 from the burner proximity side) are provided.
b, combustion gas supply passage 7 equipped with a safety solenoid valve 6c)
Is equipped with. Now, for the burner 3,
An ignition plug 9 including an ignition transformer 8 is provided, and the structure is such that automatic ignition can be performed according to a command from the burner control device 10. In order to confirm the operation of the spark plug 9, a frame rod 9a is provided facing the spark plug 9 to detect the presence or absence of flame. On the other hand, regarding the fire extinguishing of the burner 3, the main solenoid valve 6b operates in accordance with a command from the burner control device 10 so that the fire can be extinguished automatically. The above is the schematic configuration of the water heater 1.

The parts relating to the characteristic structure of the present application will be described below. In the above-mentioned combustion chamber 2, a burner combustion sound detection mechanism for detecting the burner combustion volume generated from the combustion chamber 2 in a state where the burner 3 is combusting at a side portion of the burner 3 on the lower side thereof. 11 is provided. The detection mechanism 11 includes a microphone as a sensor. This microphone can detect noise around 82 Hz. On the other hand, when the burner combustion sound volume detected by the burner combustion sound detection mechanism 11 is larger than a preset sound volume, the burner control equipment 10 once extinguishes the burner 3 and Reignition means 12 for reigniting the burner 3 is provided. The re-ignition means 12 is configured as an operation program provided in a circuit unit or a control device for performing this function. Here, the operation threshold value of the re-ignition means 12 (preset volume)
The adjustable volume 13 controls the burner control device 10.
It is provided on the front panel 14 of. The above is the schematic configuration of the water heater 1 of the present application. The operation will be briefly described below.

In the water heater 1, the operation threshold value of the re-ignition means 12 is set at the time of its installation, or when necessary, by adjusting the volume 13 described above. Therefore, when the water heater 1 is started to operate, for example, in winter, and the generated noise is higher than the threshold value, the re-ignition means 12 operates and the burner control device 10 extinguishes and re-ignites the burner 3.
As a result, even in the hot water supply operation in winter, it is possible to perform operation with low noise.

The measurement result of the noise generation phenomenon in the water heater 1 having such a configuration will be described. FIG. 2A shows the result of measuring the noise when the ignition operation is performed in the morning of winter when the outside air temperature was approximately 0 ° C. Furthermore, in Figure 2 (b),
In this situation, the result of automatic extinguishing and reignition by the function of the reignition means 12 of the present application is shown. At the reignition stage in FIG. 2B, the temperature in the combustion chamber had risen to 300 ° C. In these drawings, the horizontal axis represents frequency and the vertical axis represents volume of each frequency in decibel value.
The noise at issue here has a frequency of about 82 Hz. It can be seen that the noise that was (+) 90 dB at the time of initial ignition can be reduced to about 52 dB. Further, normally, during ignition in the morning in the summer, the noise at this frequency was about 55 dB. Therefore, it can be seen that the configuration of the present application is effective.

[Other Embodiments] Another embodiments of the present application will be described below. (A) In the above example, an example in which the configuration of the present application is adopted as a water heater as a combustion device has been shown, but this may be any device and can be applied to a gas turbine, a combustion furnace, and the like. (B) In the above example, for the detection of noise, an example of detecting this as it is as sound was shown, but basically the vibration state of the gas in the combustion chamber poses a problem. The object of the present application can also be achieved by detecting the vibration of the chamber wall. In this case, structurally, in the state where the burner is burning, a combustion chamber wall vibration detection mechanism that detects vibration of the combustion chamber wall that constitutes the combustion chamber is provided, and this combustion chamber wall vibration detection mechanism is used. If the detected vibration is larger than the preset vibration, the burner controller may temporarily extinguish the burner, and reignition means for reigniting the burner may be provided.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a water heater having the structure of the present application.

FIG. 2 is a diagram showing how noise is generated.

[Explanation of symbols]

 2 combustion chamber 3 burner 10 burner control device 11 burner combustion noise detection mechanism 12 re-ignition means

Claims (8)

[Claims] 1. A combustion device comprising a combustion chamber having a burner, and a burner control device capable of freely igniting and extinguishing the burner, wherein the burner is in a burning state,
With a burner combustion sound detection mechanism that detects a burner combustion sound volume generated from the combustion chamber, and when the burner combustion sound volume detected by the burner combustion sound detection mechanism is larger than a preset sound volume, the burner control device A combustion apparatus comprising reignition means for extinguishing the burner once and then reigniting the burner. 2. The combustion apparatus according to claim 1, wherein the re-ignition means operates when the burner is initially ignited. 3. A combustion device comprising a combustion chamber having a burner, and a burner control device capable of igniting and extinguishing the burner, wherein the burner is in a burning state,
The burner is provided with a combustion chamber wall vibration detection mechanism that detects vibration of a combustion chamber wall that forms the combustion chamber, and when the vibration detected by the combustion chamber wall vibration detection mechanism is larger than a preset vibration, the burner A combustion device comprising a re-ignition means for temporarily extinguishing the burner by a control device and then reigniting the burner. 4. The combustion apparatus according to claim 3, wherein the re-ignition means operates when the burner is initially ignited. 5. A combustion device comprising a combustion chamber having a burner, and a burner control device capable of freely igniting and extinguishing the burner, wherein the burner is in a burning state,
The burner includes a burner combustion sound detection mechanism that detects a sound volume of a preset frequency band generated from the combustion chamber, and when the sound volume detected by the burner combustion sound detection mechanism is larger than a preset sound volume, the burner A combustion device comprising a re-ignition means for extinguishing the burner once by a control device and then re-igniting the burner. 6. The combustion apparatus according to claim 5, wherein the re-ignition means operates when the burner is initially ignited. 7. A combustion device comprising a combustion chamber having a burner and a burner control device capable of igniting and extinguishing the burner, wherein the burner is in a burning state,
A combustion chamber wall vibration detection mechanism that detects vibration of a combustion chamber wall that constitutes the combustion chamber in a preset frequency band is provided, and the vibration that is detected by the combustion chamber wall vibration detection mechanism is a preset vibration. A combustion device comprising re-ignition means for extinguishing the burner once by the burner control device and re-igniting the burner when the burner control device is larger. 8. The combustion apparatus according to claim 7, wherein the re-ignition means operates when the burner is initially ignited.