JP2000193236A - Burner instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent resonant sound which is possible to occur during the period until a burner instrument being warmed immediately after a burner is ignited in the condition that the burner instrument is cooled. SOLUTION: Enlarging the ratio (air-fuel ratio) of the fan capacity to the fuel gas flow rate supplied to a burner more than usual air-fuel ratio will enable the prevention of resonant sound, so the-fan-capacity control data L1 for prevention of resonant sound to prevent the resonant sound by enlarging the air-fuel ratio more than the usual air-fuel ratio are given in advance. The control of the fan capacity is performed in the resonant sound preventive mode based on the-fan-capacity control data L1 for prevention of resonant sound while a burner instrument is armed after the burner is ignited, and the control of the fan capacity is performed in the usual-fan-capacity control data Lst on and after the time the burner instrument is warmed and the the fear of occurrence of resonant sound vanishes. The occurrence of resonant sound can be avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion apparatus provided with a combustion fan for supplying and discharging burner combustion.

[0002]

2. Description of the Related Art FIG. 7 schematically shows an example of main components of a water heater as a combustion device. As shown in FIG. 7, a burner 2 and a combustion fan 3 for supplying / exhausting combustion of the burner 2 are provided in the appliance case 1, and the burner 2 is provided with a gas for introducing a fuel gas to the burner 2. Supply passage 4
The gas supply passage 4 has an on-off valve 5 for supplying / stopping fuel gas to the burner 2 and a proportional valve 6 for variably controlling the amount of fuel gas supplied to the burner 2 with the valve opening. And are interposed.

A hot water supply heat exchanger 7 is provided above the burner 2, and a water supply passage 8 for supplying water to the heat exchanger 7 is connected to an inlet of the hot water supply heat exchanger 7. A hot water supply passage 10 is connected to the outlet side of the hot water supply heat exchanger 7, and the outlet side of the hot water supply passage 10 is guided to a hot water supply place such as a shower or a kitchen. The hot water supply passage 8 is provided with an incoming water temperature sensor 11 for detecting the temperature of the hot water supplied to the hot water supply heat exchanger 7, and the hot water supply passage 10 is provided for detecting the hot water temperature flowing out of the hot water supply heat exchanger 7. A temperature sensor 12 is provided.

Further, a control device 14 for controlling the operation of the combustion equipment is provided in the combustion equipment shown in FIG. For example, when a hot water tap (not shown) provided on the outlet side of the hot water supply passage 10 is opened and hot water in the hot water supply heat exchanger 7 flows out, the control device 14 opens and closes the open / close valve 5 of the gas supply passage 4. To start supplying fuel gas to the burner 2 through the gas supply passage 4, and also start rotating the combustion fan 3 to start supplying air (wind) to the burner 2 to ignite the burner 2.

[0005] At the time of this burner ignition, the amount of fuel gas supplied to the burner 2 and the amount of fan air, which is the amount of air, are predetermined. That is, slow ignition data for ignition as shown at a point K in FIG. 2 is given in advance, and when the burner 2 is ignited, the fuel gas amount Rk of the slow ignition data is supplied to the burner 2.
Is controlled so that the flow rate is supplied, and the rotation of the combustion fan 3 is controlled so that the fan airflow Fk is supplied to the burner 2. The mild ignition data is data on the relationship between the amount of supplied fuel gas and the amount of air flow of the fan in which ignition of the burner 2 is easily achieved, and is obtained in advance through experiments or the like. Further, since the proportional valve 6 has a configuration in which the valve opening varies when the energizing current (proportional valve current) varies, the valve opening of the proportional valve 6 is controlled by variably controlling the proportional valve current. .

After the burner ignition is performed as described above, the heat of the combustion flame of the burner 2 causes the hot water supply heat exchanger 7 to emit heat.
The water flowing through the hot water is heated and turned into hot water.
The hot water produced in the above is supplied to a hot water supply place through a hot water supply passage 10.

During the hot water supply operation, the controller 14 controls the combustion amount of the burner 2 and the rotation of the combustion fan 3 as described below. For example, using the temperature of the hot and cold water detected by the incoming water temperature sensor 11 and the outgoing water temperature sensor 12, the combustion amount of the burner 2 for supplying the hot water having the preset hot water supply set temperature is calculated every moment. In order to burn the burner 2 with the required combustion amount, the valve opening degree of the proportional valve 6 is controlled to perform the combustion amount control so that the fuel gas amount corresponding to the required combustion amount is supplied to the burner 2.

Further, normal fan air volume control data Lst as shown by a solid line Lst in FIG. 2 is given in advance. The normal fan air volume control data Lst is data on the relationship between the amount of fuel gas supplied to the burner 2 and the fan air volume due to the rotational driving of the combustion fan 3, and the relationship between the supplied fuel gas volume and the fan air volume is based on the supplied fuel gas volume. The fan air flow ratio (air-fuel ratio) is determined to be a predetermined normal air-fuel ratio appropriate for burner combustion.

The control device 14 detects a fan air flow corresponding to the supply fuel gas amount by referring to the normal fan air flow control data Lst based on the supply fuel gas amount corresponding to the required combustion amount. The rotation of the combustion fan 3 is controlled so as to be supplied to the burner 2, and the fan air volume is controlled.

When the hot water tap is opened and the flow of hot water in the hot water supply heat exchanger 7 stops, the control device 14 closes the on-off valve 5 of the gas supply passage 4 and stops the supply of fuel gas to the burner 2. The combustion of the burner 2 is stopped, the rotation of the combustion fan 3 is stopped, and the hot water supply operation is terminated.

[0011]

By the way, when the combustion equipment has not been used for a long time and has been completely cooled down, burner ignition is performed, and immediately after the ignition, the burner ignition is performed based on the normal fan air volume control data Lst. When the fan air volume control is performed after shifting to the rotation control of the combustion fan 3, the combustion equipment vibrates from the time of ignition until the combustion equipment warms up, and a resonance in which an extremely large resonance sound is generated due to the vibration. A sound generation problem may occur.

In order to prevent this resonance sound generation problem,
It is empirically known that after the burner ignition, the burner 2 should be burned in a state where the air-fuel ratio of the burner combustion (the ratio of the fan air volume to the supplied fuel gas volume) is larger than the normal air-fuel ratio. Means for preventing the following resonance sound have been proposed. For example, the burner 2 supplies a burner 2 with a fuel gas amount that is smaller than the amount of fuel gas supplied to the burner 2 corresponding to the required combustion amount, and supplies a fan air flow according to the required combustion amount to the burner 2. Means have been proposed in which the air-fuel ratio of combustion is made larger than the normal air-fuel ratio to prevent resonance noise.

However, according to the proposed means, since the amount of fuel gas supplied to the burner 2 is smaller than the amount of fuel gas corresponding to the required combustion amount, the combustion amount of the burner 2 becomes smaller than the required combustion amount. For this reason, hot water having a warmer temperature than the set hot water supply temperature is supplied, causing a problem that the reliability of hot water supply temperature control is deteriorated, which is not satisfactory.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a satisfactory combustion apparatus capable of preventing a problem of generating resonance noise.

[0015]

In order to achieve the above-mentioned object, the present invention provides means for solving the above-mentioned problems with the following arrangement. That is, the first invention is provided with a combustion fan for supplying and exhausting burner combustion, wherein a ratio of a fan air flow rate by rotation driving of the combustion fan to an amount of fuel gas supplied to the burner is a predetermined normal air-fuel ratio. The relationship data between the supplied fuel gas amount information and the fan air volume information is provided as normal fan air volume control data, and during the burner combustion, the combustion is performed in the normal fan air volume control mode based on the normal fan air volume control data. In a combustion device provided with a normal fan air volume control unit for controlling the rotation of the fan, the ratio of the fan air volume to the amount of fuel gas supplied to the burner according to the required combustion volume is set to be larger than the normal air-fuel ratio. The relationship data between the supplied fuel gas amount information and the fan air volume information to suppress the generation of resonance noise is controlled by the fan air volume control for preventing resonance noise. A fan airflow control unit for controlling the rotation of the combustion fan in a resonance prevention mode based on the fan airflow control data for resonance sound prevention; The fan air volume control unit controls the rotation of the combustion fan in the resonance sound prevention mode, and after the predetermined resonance noise avoidance condition is satisfied, the normal fan air volume control unit controls the combustion fan in the normal fan air volume control mode. And a fan air volume control mode switching unit for switching to rotation control.

According to a second aspect of the present invention, there is provided the configuration of the first aspect, and it is determined that the resonance generation avoidance condition is satisfied when a predetermined resonance generation avoidance time has elapsed since the burner ignition was performed. The above-described problem is solved by a configuration in which a resonance sound generation avoidance determination unit is provided.

According to a third aspect of the present invention, in addition to the configuration of the second aspect of the invention, an outside air temperature detecting means for detecting an outside air temperature around the combustion equipment; A resonance sound generation avoiding time variable setting unit that variably sets a resonance sound generation avoiding time based on at least the detected outside air temperature of the amount information.

According to a fourth aspect of the present invention, there is provided the configuration of the first aspect, wherein an outside air temperature detecting means for detecting an outside air temperature around the combustion equipment; and the outside air temperature and the burner ignition detected by the outside air temperature detecting means are provided. Resonance sound generation data, which is relational data between the supplied fuel gas amount information and the fan air amount information, for determining whether or not the combustion equipment is likely to emit resonance sound based on the information on the elapsed time since the combustion was performed. A resonance sound generation presence / absence determination data detector for obtaining presence / absence determination data every moment; fan air volume information of normal fan air volume control data corresponding to fuel gas supply information to a burner corresponding to a required combustion amount; Compared with the fan air volume information in the judgment data, avoiding resonance sound generation when it is determined that the fan air volume information in the resonance sound generation presence / absence judgment data is smaller than the fan air volume information in the normal fan air volume control data Resonance generating avoidance judging section judges that the matter is satisfied and, with a configuration that is provided is a means to solve the problem.

According to a fifth aspect of the present invention, there is provided the air conditioner according to any one of the first to fourth aspects, further comprising an outside air temperature detecting means for detecting an outside air temperature around the combustion equipment. A resonance sound prevention fan air flow control data variable setting unit is provided for variably setting resonance air prevention fan air flow control data for suppressing the combustion equipment from emitting resonance sound based on the outside air temperature detected by the detection means. The above configuration is a means for solving the above problem.

According to a sixth aspect of the present invention, there is provided the configuration of any one of the first to fifth aspects of the present invention, wherein the fan air volume control data for resonance prevention is transmitted to the normal fan air volume control after the burner ignition is performed. The means for solving the above-described problem is provided by a configuration in which a fan air volume control data variable unit that varies stepwise or continuously in a direction that matches the data is provided.

According to a seventh aspect of the present invention, there is provided a hot water supply heat exchanger for hot water supply and another function heat exchanger for other functions other than hot water supply, comprising the configuration of any one of the first to sixth inventions. Are provided integrally, and a burner for burning and heating these integrated heat exchangers in common is provided as a one-can-two-channel-type combustion device, which is a means for solving the above problem. .

According to an eighth aspect of the present invention, a hot water supply heat exchanger for hot water supply and another function heat exchanger for functions other than the hot water supply are provided integrally, and these integrated heat exchangers are commonly burned and heated. A burner and a combustion fan for supplying / exhausting the burner combustion are provided. An intermittent combustion control unit for performing on / off control of the burner combustion is provided during operation of the other function alone, and a fuel supplied to the burner is provided. Relational data between the supplied fuel gas amount information and the fan air amount information so that the ratio of the fan air amount due to the rotational drive of the combustion fan to the gas amount becomes a predetermined normal air-fuel ratio is given as normal fan air amount control data. In a one-can-two-channel type combustion device having a configuration for controlling the rotation of the combustion fan based on the normal fan air volume control data during burner combustion, burner ignition by single operation of other functions During the resonance prevention period including at least the initial combustion ON period from when the burner combustion is interrupted by the intermittent combustion control unit to the normal combustion period corresponding to the fuel gas supply information to the burner according to the required combustion amount, The above problem is solved by a configuration in which a resonance sound prevention fan air volume control unit for controlling the rotation of the combustion fan is provided so that a resonance air volume control fan air volume larger than the fan air volume of the fan air volume control data is supplied to the burner. Means to do that.

According to a ninth aspect of the present invention, the first combustion ON period and the second combustion ON period in the intermittent combustion are defined as the resonance prevention period. Section is 2 times longer than the first combustion ON period.
Means for solving the above-mentioned problem is a configuration in which the rotation of the combustion fan is controlled so that the amount of fan air for preventing resonance noise during the second combustion ON period is reduced.

According to a tenth aspect of the present invention, a hot water supply heat exchanger for hot water supply and another function heat exchanger for functions other than hot water supply are integrally provided, and these integrated heat exchangers are commonly burned and heated. A burner is provided, and in the one-can-two-channel type combustion apparatus provided with an intermittent combustion control unit for performing on / off control of burner combustion during the other function alone operation, the burner ignition is performed by the other function alone operation. After that, during the first combustion ON period until the burner combustion is interrupted by the intermittent combustion control unit, the burner combustion is performed with the predetermined resonance sound prevention combustion amount until the predetermined resonance sound prevention control end condition is satisfied. The above-mentioned problem is solved by a configuration in which a combustion amount control unit for preventing resonance is provided.

According to an eleventh aspect of the present invention, there is provided the configuration of the tenth aspect of the present invention, wherein a hot water temperature detector in the heat exchanger for detecting a hot water temperature in the hot water supply heat exchanger is provided. Burner combustion is stopped when the hot water temperature in the hot water supply heat exchanger detected by the hot water temperature detecting means rises above a predetermined off-temperature, and the detected hot water temperature in the hot water supply heat exchanger falls below a predetermined on-temperature. When the combustion amount is controlled by the resonance amount preventing combustion amount control unit, the off-temperature variable setting unit that increases the off-temperature is provided. Is a means to solve.

In the invention having the above structure, for example, after the burner ignition is performed, the fuel gas amount corresponding to the required combustion amount is supplied to the burner, and the ratio of the fan air amount to the fuel gas amount supplied to the burner (the idle air amount). For example, the rotation control of the combustion fan is performed based on resonance air flow control data so as to make the fuel ratio larger than the normal air-fuel ratio.

[0027] During a period when there is a possibility that a resonance sound is generated,
During the period from when the burner is ignited to when the combustion equipment is warmed, the above-described combustion fan rotation control is performed, so that the air-fuel ratio of the burner combustion is lower than the normal air-fuel ratio so that the generation of resonance can be suppressed. , The resonance can be prevented. In addition, the burner is supplied with the amount of fuel gas corresponding to the required combustion amount, so that the burner can perform combustion with the required combustion amount while preventing resonance noise. Thus, the above-mentioned subject can be solved.

[0028]

Embodiments of the present invention will be described below with reference to the drawings.

The combustion apparatus of the first embodiment has the system configuration shown by the solid line in FIG.
The outside air temperature detecting means 16 for detecting the outside air temperature around the combustion equipment as shown by the dashed line is provided, and the control device 14 is provided with a specific control configuration capable of suppressing the generation of the resonance sound. That is. In the system configuration of the combustion equipment shown in FIG.

As shown by the solid line in FIG. 1, the characteristic control device 14 of the first embodiment includes a combustion amount control unit 20, an ignition control unit 21, a resonance sound generation avoiding time variable setting unit 22, a time It comprises a measuring means 23, a resonance sound avoidance judging section 24, a data storage section 25, a normal fan air volume control section 26, a fan air volume control mode switching section 27, and a fan air volume control section 28 for resonance sound prevention. .

The ignition control section 21 has a structure for controlling the ignition of the burner 2. For example, mild ignition data as indicated by a point K in FIG. 2 is predetermined and stored in the data storage unit 25, and the ignition control unit 21 determines that the water in the hot water supply heat exchanger 7 Begins to flow, the valve opening of the proportional valve 6 is controlled so that the fuel gas amount Rk of the mild ignition data is supplied to the burner 2, and the fan airflow Fk of the mild ignition data is supplied to the burner 2. The burner 2 is ignited by controlling the rotation of the combustion fan 3 as described above. In the first embodiment, the ignition control unit 21 achieves the burner ignition when the flame is formed over substantially the entire area of the burner 2 and the ignition is achieved after the burner ignition control. An ignition completion signal notifying the fact is output to the combustion amount control unit 20, the resonance sound avoidance determination unit 24, and the fan air volume control mode switching unit 27, respectively.

After detecting that the burner ignition has been achieved by the application of the ignition completion signal from the ignition control unit 21, the combustion amount control unit 20 instantaneously determines the combustion amount for supplying hot water at the set hot water supply temperature. And the burner 2 is controlled so as to obtain the required burnup. That is, the combustion amount control unit 20 controls the proportional valve 6 so that the amount of fuel gas necessary to obtain the required combustion amount obtained above is supplied to the burner 2.
Is performed to control the combustion amount of the burner 2.

The data storage unit 25 stores normal fan air volume control data Lst as shown by the solid line Lst in FIG. 2 described above, and the normal fan air volume control unit 26 stores a normal fan air volume control data Lst based on the normal fan air volume control data Lst. The rotation of the combustion fan 3 is controlled in the fan air volume control mode. For example,
The normal fan air volume control unit 26 fetches the operation information of the combustion amount control unit 20 from time to time, and stores the amount of fuel gas supplied to the burner 2 based on the fetched information.
5, the normal fan air volume control data Lst corresponding to the supplied fuel gas amount is detected to detect the fan air volume, and the detected fan air volume is supplied to the burner 2 so as to be supplied to the burner 2. The rotation control of is performed.

Specifically, for example, when the amount of fuel gas supplied to the burner 2 is the fuel gas amount Rex shown in FIG.
The normal fan air volume control unit 26 determines the fuel gas amount Rex
The rotation control of the combustion fan 3 is performed such that the fan airflow Fex of the normal fan airflow control data Lst corresponding to the above is supplied to the burner 2.

As described above, when the combustion equipment has not been used for a long time and has been completely cooled, burner ignition is performed. Immediately after the ignition, the normal fan air volume control unit 26 controls the normal fan air volume control. If the rotation control of the combustion fan 3 is performed in the mode, the combustion equipment vibrates until the combustion equipment is warmed, and there is a possibility that an extremely loud resonance sound caused by the vibration is generated.

Therefore, in the first embodiment, the resonance noise is prevented by making the air-fuel ratio of the burner combustion (the ratio of the fan air flow to the amount of fuel gas supplied to the burner) larger than the normal air-fuel ratio. Because you can
In consideration of this, a resonance sound preventing fan air volume control unit 28 having the following configuration is provided.

The resonance air flow control unit 28 controls the rotation of the combustion fan 3 in a resonance prevention mode based on the resonance air flow control data L1 as shown by the solid line L1 in FIG.

The above-mentioned resonance air flow control data L
Reference numeral 1 denotes data on the relationship between the amount of fuel gas supplied to the burner 2 and the fan airflow, which can suppress the generation of resonance noise by making the air-fuel ratio of burner combustion larger than the normal air-fuel ratio, and can prevent the resonance noise. The relationship between the supplied fuel gas amount and the fan airflow based on the air-fuel ratio is determined by experiments, calculations, and the like.

The resonance sound preventing fan air volume control unit 28 refers to the amount of fuel gas supplied to the burner 2 based on the information taken from the combustion amount control unit 20, for example, to the resonance sound preventing fan air volume control data L1. A fan air flow corresponding to the supplied fuel gas amount is detected from the resonance sound preventing fan air flow control data L1, and the detected fan air flow is detected by the burner 2;
The rotation of the combustion fan 3 is controlled so as to be supplied to the combustion fan 3.

Specifically, for example, when the amount of fuel gas supplied to the burner 2 is the fuel gas amount Rex shown in FIG. The rotation of the combustion fan 3 is controlled so that the fan airflow Fex ′ of the resonance airflow control data L1 corresponding to the amount Rex is supplied to the burner 2.

In the first embodiment, a fan air volume control mode switching unit 27 is provided. The fan air volume control mode switching unit 27 controls the rotation of the combustion fan 3 in the normal fan air volume control mode by the normal fan air volume control unit 26, and controls the combustion fan 3 in the resonance prevention mode by the resonance air volume control unit 28. It performs switching control with rotation control. For example, when the ignition control unit 21 receives an ignition completion signal indicating burner ignition from the ignition control unit 21, the fan air volume control mode switching unit 27 first causes the resonance air flow control unit 28 to control the rotation of the combustion fan 3. To prevent the generation of resonance.

By controlling the rotation of the combustion fan 3 in the resonance prevention mode, it is possible to prevent the generation of resonance. However, the air-fuel ratio of burner combustion deviates from the normal air-fuel ratio. Since the burner combustion is not in an appropriate combustion state, it is not preferable that this combustion state be continued for a long time, and when there is no longer a risk of occurrence of resonance noise, the normal fan air volume control unit 26
It is desired to switch to the rotation control of the combustion fan 3 in the normal fan air volume control mode, and shift to the burner combustion at the normal air-fuel ratio to obtain a good combustion state.

In view of the above, the resonance sound generation avoiding condition which can determine that the combustion equipment is heated by the burner combustion after the burner ignition and the resonance sound generation is avoided even when the burner combustion is performed at the normal air-fuel ratio is determined in advance. When the above-described resonance sound generation avoidance condition is satisfied, the fan air volume control mode switching unit 27 determines that there is no fear of occurrence of resonance noise even if the burner combustion is performed at the normal air-fuel ratio. The rotation control of the combustion fan 3 in the resonance prevention mode by the control unit 28 is switched to the rotation control of the combustion fan 3 in the normal fan air volume control mode by the normal fan air volume control unit 26.

In the first embodiment, the condition that the elapsed time from ignition of the burner reaches the resonance sound generation avoidance time is set as the above-mentioned resonance sound generation avoidance condition. The above-described resonance sound generation avoidance time is a period of time from when the burner 2 is ignited to when it is determined that there is no longer a risk of occurrence of resonance noise even when the combustion equipment is warmed up and burner combustion is performed at a normal air-fuel ratio. By the way, as the outside air temperature around the combustion equipment decreases, the degree of cooling of the combustion equipment increases, and the time from when ignition is performed to when the combustion equipment warms increases. Further, the burner 2 burns a large amount.
It is known that the greater the amount of fuel gas burned in the fuel cell, the longer the period during which resonance noise may be generated. For these reasons, in the first embodiment, the resonance sound generation avoiding time variable setting unit 22 is provided, and the outside air temperature around the combustion device and the combustion of the combustion device are controlled by the resonance sound generation avoiding time variable setting unit 22. A configuration is provided for variably setting the above-described resonance sound generation avoiding time in consideration of the amount.

That is, the resonance sound generation avoiding time variable setting unit 2
2 represents the outside air temperature detected by the outside air temperature detecting means 16, the required combustion amount information fetched from the combustion amount control unit 20, and the resonance sound generation avoidance time setting data given in advance to the data storage unit 25. Based on this, the resonance sound generation avoidance time is variably set.

The resonance sound generation avoidance time setting data is data for setting the resonance sound generation avoidance time based on a combination of the outside air temperature around the combustion equipment and the required combustion amount. It is determined and determined, for example, and is formed by graph data as shown in FIG. The resonance sound generation avoidance time setting data shown in FIG. 3 is formed from data on a plurality of combustion amounts and resonance sound generation avoidance time as shown by solid lines a to d associated with the outside air temperature. Note that the associated outside air temperature decreases from the solid line data a to the solid line data d shown in FIG.

When the resonance sound avoidance time setting data as shown in FIG. 3 is given, for example, the resonance sound avoidance time variable setting section 22 sets the relational data a to
From d, the related data corresponding to the outside air temperature detected by the outside air temperature detecting means 16 is selected, and the required combustion amount taken in from the combustion amount control unit 20 is referred to in the selected related data to correspond to the required combustion amount. The resonance sound generation avoidance time of the selected relation data is detected, and the detected time is set as the resonance sound generation avoidance time.

The resonance sound generation avoidance judging section 24 judges that the resonance sound generation avoidance condition is satisfied when the above-described resonance sound generation avoidance time has elapsed since the burner was ignited. That is, when the ignition completion signal is added from the ignition control unit 21, the resonance generation avoidance determination unit 24 outputs a measurement start signal to the time measurement unit 23. The time measuring means 23 has a built-in clock mechanism (not shown),
When the measurement start signal is applied, the clock mechanism is driven to start measuring the elapsed time after the burner 2 is ignited.

The resonance sound generation avoidance judging section 24 fetches the time information measured by the time measuring means 23 from time to time, and uses this measurement time as the resonance sound generation avoidance time set by the resonance sound generation avoidance time variable setting section 22. In comparison with the time, it is determined whether or not the time measured by the time measuring means 23 has reached the above-described resonance sound generation avoidance time.

When the resonance generation avoidance determination unit 24 determines that the time measured by the time measuring means 23 has reached the resonance generation avoidance time as a result of the above comparison, the resonance generation avoidance condition is satisfied. That is, it is determined that the combustion equipment has warmed up due to the burner combustion, and there is no fear of generating the resonance sound, and a signal indicating that the generation of the resonance sound has been avoided is output to the fan air volume control mode switching unit 27. Upon receiving this signal, the fan air volume control mode switching unit 27 performs the mode switching of the rotation control of the combustion fan 3 as described above.

According to the first embodiment, in addition to the normal fan air volume control unit 26, the resonance air volume control unit 28 for preventing resonance noise is provided. Since the rotation control of the combustion fan 3 in the resonance prevention mode is performed, that is, after the ignition, the combustion fan 3 is set so that the air-fuel ratio of the burner combustion becomes larger than the normal air-fuel ratio so that resonance can be prevented. Since the rotation control is performed, generation of resonance noise can be avoided. Thus, it is possible to prevent the user of the appliance from feeling uncomfortable due to the generation of the resonance sound.

In the first embodiment, the air-fuel ratio is made larger than the normal air-fuel ratio by increasing the fan airflow more than the normal air-fuel ratio to prevent the generation of resonance noise. Since the fuel gas amount corresponding to the required combustion amount is supplied, the burner 2 can burn with the required combustion amount. By this, while preventing the generation of resonance sound,
Hot water at a hot water supply set temperature desired by the user of the hot water can be supplied, and a decrease in the reliability of the hot water supply operation can be prevented.

Furthermore, in the first embodiment, when the condition for avoiding the resonance sound generation is satisfied and the resonance sound is not generated even when the rotation control of the combustion fan 3 is performed in the normal fan air volume control mode. In addition, since the configuration is such that the resonance sound prevention mode by the resonance sound prevention fan air volume control unit 28 is switched to the normal fan air volume control mode by the normal fan air volume control unit 26, after the occurrence of the resonance sound is avoided. , The burner combustion is performed with an appropriate normal air-fuel ratio, and the rotation control of the combustion fan 3 in the resonance sound prevention mode by the resonance sound prevention fan air flow control unit 28 is performed for a long time. Can be prevented.

Further, in the first embodiment, the resonance generation avoidance determining unit 24 satisfies the resonance generation avoidance condition when the resonance generation avoidance time has elapsed since the burner 2 was ignited. With this configuration, it is possible to determine with a simple configuration that there is no fear of generating resonance noise even when the rotation control of the combustion fan 3 is performed in the normal fan air volume control mode. In other words, the switching timing from the resonance prevention mode to the normal fan air volume control mode can be determined with a simple control configuration.

Further, the time from when the burner is ignited until the combustion equipment warms up and there is no fear of generating resonance noise varies depending on the outside air temperature around the combustion equipment and the amount of combustion. The timing suitable for switching to the fan air volume control mode also varies according to the outside air temperature and the amount of combustion. In the first embodiment, a resonance sound generation avoiding time variable setting unit 22 is provided, and the resonance sound generation avoiding time variable setting unit 22 controls the resonance sound generation according to the outside air temperature around the combustion equipment and the required combustion amount. It is equipped with a configuration that variably sets the sound generation avoidance time, so the outside temperature around the combustion equipment,
Regardless of the required amount of combustion (high or low), the mode switching of the rotation control of the combustion fan 3 from the resonance prevention mode to the normal fan air volume control mode can always be performed at a more appropriate timing.

Hereinafter, a second embodiment will be described. In the second embodiment, in the same manner as in the first embodiment, the fan air volume for preventing the resonance sound is generated after the burner 2 is ignited until the predetermined resonance generation avoidance condition is satisfied. When the rotation of the combustion fan 3 in the resonance prevention mode is controlled by the control unit 28 and the above-described resonance generation avoidance condition is satisfied, the resonance air flow control unit 28
Is switched from the rotation control of the combustion fan 3 in the resonance prevention mode to the rotation control of the combustion fan 3 in the normal fan air volume control mode by the normal fan air volume control unit 26, but in the second embodiment. In this embodiment, the condition for avoiding the generation of resonance is different from that of the first embodiment, and a unique control configuration for determining the switching timing of the rotation control mode of the combustion fan 3 is provided.

That is, in the second embodiment, as shown by the solid line in FIG. 4, the control device 14 comprises a combustion amount control unit 20, an ignition control unit 21, a time measurement unit 23, and a resonance sound avoidance determination unit. 24, a data storage unit 25, a normal fan air volume control unit 26, a fan air volume control mode switching unit 27, a resonance air volume control unit 28 for preventing resonance noise, and a resonance sound generation presence / absence determination data detection unit 30. .

The combustion amount control unit 20, ignition control unit 21, time measurement unit 23, data storage unit 25, normal fan air volume control unit 26, and fan air volume control mode switching unit 2
7 and the resonance sound prevention fan air volume control unit 28 are the combustion volume control unit 20 and the ignition control unit 21 shown in the first embodiment.
, A time measurement unit 23, a data storage unit 25, a normal fan air volume control unit 26, a fan air volume control mode switching unit 27, and a fan air volume control unit 28 for preventing resonance noise. Duplicate description is omitted.

In the second embodiment, after the burner 2 is ignited, resonance sound occurrence / non-execution determination data for determining whether or not the combustion equipment is likely to generate a resonance sound is instantaneously obtained. The resonance sound generation avoidance condition is satisfied when it is determined based on the resonance sound generation presence / absence determination data that the combustion equipment is warmed by the burner combustion and the risk of generating the resonance sound is eliminated even when the burner combustion is performed at the normal air-fuel ratio. Judge that

The resonance sound occurrence / non-judgment data detecting unit 30 has a structure for obtaining the resonance sound occurrence / non-judgment data. For example, an ignition completion signal for notifying that the burner 2 has been ignited from the ignition control unit 21. Is detected, the outside air temperature detected by the outside air temperature detecting means 16 is taken in, and a measurement start signal is output to the time measuring means 23. When receiving the measurement start signal, the time measuring means 23 starts measuring the elapsed time since the burner 2 was ignited by using a built-in clock mechanism (not shown).

The resonance sound occurrence presence / absence determination data detection unit 30
Resonance sound occurrence presence / absence determination data is obtained based on the acquired information on the outside air temperature and the resonance sound occurrence presence / absence determination data setting data stored in the data storage unit 25 in advance. The resonance sound generation presence / absence determination data is data on the relationship between the amount of fuel gas supplied to the burner 2 and the fan air flow for determining whether or not there is a risk that the combustion equipment may generate resonance sound.

In the second embodiment, a plurality of resonance sound occurrence / non-judgment data as shown by chain lines a to g in FIG. The presence / absence determination data is stored in the data storage unit 25 as data for determining presence / absence determination.
From among the above, the resonance sound generation presence / absence determination data corresponding to the taken outside air temperature is selected and read out, and the resonance sound generation presence / absence determination data when the burner ignition is performed is detected.

As described above, after detecting the resonance sound occurrence / non-occurrence judgment data at the time of ignition, the resonance sound occurrence / non-occurrence judgment data detecting section 30 fetches the time measured by the time measuring means 23 every moment. According to this measurement time, the selected resonance sound occurrence / non-judgment data is changed in the direction of decreasing the fan airflow (that is, in the direction from the resonance sound occurrence / non-judgment data a shown in FIG. 2 to the resonance sound occurrence / non-judgment data g).
By parallel movement, the resonance sound generation presence / absence determination data is variably set every moment.

The resonance sound generation avoidance judging unit 24 fetches the information of the resonance sound occurrence judgment data variably set by the resonance sound occurrence judgment data detecting unit 30 from time to time, and the combustion amount control unit 20 sends the information to the burner 2. By taking in information on the amount of fuel gas to be supplied, the fan air volume of the above-described resonance sound generation presence / absence determination data corresponding to the amount of fuel gas supplied to the burner 2 is compared with the fan air volume of the normal fan air volume control data Lst described above, It is determined whether or not the fan air volume of the resonance sound occurrence determination data is smaller than the fan air volume of the normal fan air volume control data Lst.

When the resonance sound generation avoidance determination unit 24 determines that the fan air volume of the resonance sound generation presence / absence determination data is smaller than the fan air volume of the normal fan air volume control data Lst as a result of the above comparison, the resonance sound generation avoidance condition is set. Is satisfied, that is, it is determined that there is no fear of generating a resonance sound even if the combustion equipment is warmed up and performing burner combustion at a normal air-fuel ratio, and a signal notifying that the resonance generation avoidance condition has been satisfied is transmitted to the fan air volume control mode. Output to the switching unit 27.

Specifically, for example, when the burner 2 is ignited, the resonance sound generation presence / absence determination data corresponding to the outside air temperature detected by the outside air temperature detection means 16 is the data indicated by the chain line b in FIG. When the amount is the combustion amount Rx shown in FIG. 2, immediately after the burner ignition, the fan air volume Fx of the resonance sound generation presence / absence determination data b corresponding to the required combustion amount Rx is obtained.
Is larger than the fan air volume Fs of the normal fan air volume control data Lst, but as time passes, the resonance sound occurrence presence / absence determination data b moves in a parallel direction in a decreasing direction of the fan air volume. The fan air volume of the corresponding resonance sound generation presence / absence determination data b decreases, and the resonance air generation avoidance determination unit 24 sets the fan air volume of the resonance sound generation presence / absence determination data b to the normal fan air volume control data Lst. When it is determined that it has become smaller than Fs, a signal notifying that the resonance generation avoidance condition has been satisfied is output to the fan air volume control mode switching unit 27.

The fan air volume control mode switching unit 27
When the signal is received, the rotation control mode of the combustion fan 3 is switched as described in the first embodiment.

According to the second embodiment, the first
Similarly to the embodiment, a resonance sound preventing fan air volume control unit 28 is provided, and during a period in which a resonance sound is likely to be generated after the burner is ignited, the normal air-fuel ratio is set to prevent the generation of the resonance sound. Also, since the rotation of the combustion fan 3 is controlled so as to increase the air-fuel ratio, it is possible to prevent the combustion equipment from emitting resonance noise. Further, since the generation of the resonance noise is prevented as described above while supplying the fuel gas amount corresponding to the required combustion amount to the burner 2, the burner 2 is burned at the required combustion amount, and the hot water supply desired by the user of the hot water Hot water at the set temperature can be supplied. Accordingly, it is possible to prevent the combustion device from emitting resonance noise and to avoid a decrease in reliability of the hot water supply operation.

Further, resonance sound occurrence / non-judgment data for judging whether or not the combustion equipment emits resonance sound is determined, and resonance sound prevention of rotation control of the combustion fan 3 is performed based on the resonance sound occurrence / non-judgment data. Since the configuration for determining the switching timing from the mode to the normal fan air volume control mode is provided, the rotation control mode of the combustion fan 3 can be switched at a timing suitable for the mode switching. As a result, there is a problem that the mode switching is performed too early to generate a resonance sound, and that the mode switching is too slow, and the rotation control of the combustion fan 3 in the resonance prevention mode is continuously performed for a long time. It is possible to prevent the problem of the occurrence of adverse effects.

Hereinafter, a third embodiment will be described. What is characteristic in the third embodiment is that, in addition to the configuration of each of the above embodiments, a resonance sound preventing fan air volume control data variable setting unit 31 indicated by a dotted line in FIGS. 1 and 4 is provided. The other configuration is the same as that of each of the above embodiments, and the duplicated description of the common part is omitted.

In the third embodiment, instead of storing the resonance air volume control data L1 in advance in the data storage unit 25 as shown in the above embodiments,
Each time the burner 2 is ignited, a configuration is provided in which the resonance air volume control data L1 is variably set based on the outside air temperature around the combustion equipment.

By the way, as the outside air temperature around the combustion equipment decreases, the degree of cooling of the combustion equipment increases, and conversely, as the outside air temperature increases, the cooling degree of the combustion equipment decreases. It is assumed that the degree of cooling of the combustion equipment varies depending on the outside temperature of the combustion equipment. As described above, it is possible to suppress the generation of resonance by shifting the air-fuel ratio of the burner combustion from the normal air-fuel ratio, and the difference between the optimum air-fuel ratio and the normal air-fuel ratio for suppressing the generation of the resonance noise. The amount depends on the degree of cooling of the combustion equipment when the burner 2 is ignited (in other words,
(Depending on the outside air temperature around the combustion equipment). From this, based on the amount of deviation between the optimal air-fuel ratio for suppressing the generation of resonance and the normal air-fuel ratio, which varies according to the outside air temperature around the combustion equipment, the fan air volume control data L1 for resonance noise prevention is controlled. May be variably set.

Therefore, in the third embodiment, as described above, the control structure for variably setting the resonance sound preventing fan air volume control data L1 according to the outside air temperature around the combustion equipment at the time of burner ignition is provided. Was.

That is, when it is detected that the ignition control unit 21 outputs an ignition completion signal indicating that the burner 2 has been ignited, the outside air temperature is controlled. The outside air temperature detected by the detecting means 16 is detected.

The data storage unit 25 is provided with data for obtaining the fan air volume control data L1 for preventing resonance using the outside air temperature in advance. For example, data for calculating fan air volume control data for preventing resonance noise using the outside air temperature is given as data for calculating fan air volume control data for preventing resonance noise.

The resonance sound generation presence / absence determination data detection unit 30 calculates resonance sound prevention fan air volume control data L1 based on the taken-in outside air temperature and the resonance sound prevention fan air volume control data calculation data.

The resonance sound prevention fan air volume control data variable setting unit 31 controls the resonance sound prevention fan air volume control data variable setting unit 31 during a period from the time when the burner is ignited to the time when the combustion equipment is warmed up and there is no fear of generating the resonance sound. The rotation control of the combustion fan 3 in the resonance prevention mode is performed based on the set resonance sound prevention fan air volume control data L1.

According to the third embodiment, the burner 2
Each time the ignition is performed, the resonance air flow control data L1 is set based on the outside air temperature, so that the following effects can be obtained.

For example, in the case where predetermined resonance sound prevention fan air volume control data L1 is given as fixed data, it is necessary to prevent the generation of resonance noise regardless of the degree of cooling of the combustion equipment. Thus, the air-fuel ratio of burner combustion is obtained such that the fixed resonance sound preventing fan air volume control data L1 is given based on the air-fuel ratio. That is, the fixed resonance sound preventing fan air volume control data L1 is given based on the air-fuel ratio which is considerably deviated from the normal air-fuel ratio. For this reason, if the rotation control of the combustion fan 3 is performed based on the resonance sound preventing fan air volume control data L1, the generation of resonance noise can be reliably avoided, but the air-fuel ratio of the burner combustion is normally the air-fuel ratio. Therefore, the burner combustion state is not a preferable state.

In the third embodiment, a configuration is provided in which the resonance air flow control data L1 for preventing resonance noise is variably set in accordance with the outside air temperature around the combustion equipment. The fan air volume control data L1 for preventing resonance noise can be variably set according to the degree. From this, when the outside air temperature around the combustion equipment is high, the fan air volume control data L1 for resonance sound prevention based on the air-fuel ratio having a small deviation from the normal air-fuel ratio is variably set. Since the rotation control of the combustion fan 3 in the resonance prevention mode is performed based on the fan air volume control data L1, not only the resonance can be prevented, but also the rotation control of the combustion fan 3 is performed in the resonance prevention mode. It is possible to alleviate the bad state of burner combustion during a certain period.

Hereinafter, a fourth embodiment will be described. The fourth embodiment is characterized in that, in addition to the configuration of each of the above embodiments, a fan air volume control data variable unit 32 shown by a chain line in FIGS. 1 and 4 is provided. The other configuration is the same as that of each of the above embodiments, and the overlapping description of the common parts will be omitted.

By the way, after the burner ignition, the combustion equipment is heated by the heat of the burner combustion as time elapses. Therefore, it is possible to prevent the generation of resonance noise as the time elapses after the burner ignition is performed. The deviation between the optimal air-fuel ratio and the normal air-fuel ratio that can be achieved is small. From this, in the fourth embodiment, based on the amount of deviation between the optimum air-fuel ratio and the normal air-fuel ratio, which change with the elapse of time after the burner ignition and can prevent the occurrence of the resonance sound, A configuration for variably setting the resonance airflow control data L1 is provided.

That is, upon detecting that the ignition completion signal has been output from the ignition control unit 21, the fan air volume control data variable unit 32 detects the resonance from the data storage unit 25 or the resonance noise prevention fan air volume control data variable setting unit 31. The information of the sound prevention fan air flow control data L1 is fetched, and based on the time measured by the time measurement unit 23, the resonance sound prevention fan air flow control data L1 is stepwise adjusted in a direction to match the normal fan air flow control data Lst. Or, it is continuously variably set.

After the burner 2 is ignited, the fan air volume control unit for resonance sound prevention unit 28 sets the fan air volume control data L1 for resonance sound prevention which is variably set every moment by the fan air volume control data variable unit 32. , The rotation of the combustion fan 3 in the resonance prevention mode is controlled.

As described above, the fan air flow control data L1 for resonance prevention is variably set by the fan air flow control data variable section 32 with the lapse of time after the burner ignition. During the rotation control of No. 3, the fan airflow supplied to the burner 2 continuously or stepwise decreases toward the fan airflow of the normal fan airflow control data Lst even if the required combustion amounts are equal. It will be.

According to the fourth embodiment, the fan air volume control data L1 for preventing resonance noise is stepwise or continuously added to the normal fan air volume control data as time elapses after the burner ignition is performed. Lst is set to be variable so as to match Lst, so that the combustion fan 3 in the resonance prevention mode is provided.
During the period in which the rotation control is performed, the air-fuel ratio of the burner combustion approaches the normal air-fuel ratio as time elapses, and the defective state of the burner combustion caused by the deviation of the air-fuel ratio from the normal air-fuel ratio is elapsed. Can be alleviated with it.

Hereinafter, a fifth embodiment will be described. This fifth embodiment is directed to a one-can-two-channel type combustion device as shown in FIG. This one-can-two-channel type combustion device can perform a hot water supply function and a function other than hot water supply (for example, a bath function or a heating function). In addition to the configuration shown in FIG. As shown in the figure, another function heat exchanger 17 for another function is provided integrally with the hot water supply heat exchanger 7, and the burner 2 performs combustion heating of the hot water supply heat exchanger 7 and the other function heat exchanger 17 in common. The configuration is such that: In the description of the fifth embodiment, the same reference numerals are given to the same components as those in each of the above-described embodiments, and the overlapping description of the common portions will be omitted.

In the above-described one-can-two-channel type combustion equipment, when the burner 2 is burning by the other function alone operation, the heat of the combustion flame of the burner 2 causes not only the heat exchanger 17 but also the hot water supply heat exchange. Since the heater 7 is also heated, the hot water staying in the hot water supply heat exchanger 7 is heated,
May rise to high temperatures close to boiling. in this way,
If the hot water tap is opened while the hot water in the hot water supply heat exchanger 7 is extremely hot, the hot water flows out of the hot water supply heat exchanger 7 and is supplied with hot water. The hot water hits the hot water, which may cause discomfort due to the high temperature or may cause burns.

Therefore, in the single-can, two-channel type combustion apparatus, the intermittent combustion for turning on / off the combustion of the burner 2 is performed while the other function is operated alone, and the retained hot water in the hot water supply heat exchanger 7 is brought to a boil. Measures may be taken to suppress the rise to near high temperatures.

Specifically, for example, as shown in FIG.
A hot water temperature detector 18 for detecting the hot water temperature in the hot water supply heat exchanger 7 is provided, and the hot water heat exchanger 7 detected by the hot water temperature detecting means 18 during the operation of the other functions alone. The temperature of the hot water staying in the room is a predetermined off-temperature (for example,
When it is detected that the temperature has risen above 65 ° C.), the combustion of the burner 2 is interrupted and the hot water temperature detected by the hot water temperature detecting means 18 in the heat exchanger is set to a predetermined ON temperature (for example, 60 ° C. lower than the OFF temperature). When it is detected that the temperature has decreased below, the combustion of the burner 2 is restarted. In this way, by intermittently burning the burner 2 during the other function alone operation, it is possible to prevent the retained hot water in the hot water supply heat exchanger 7 from rising to a high temperature close to boiling.

In the fifth embodiment, a control structure for preventing the resonance noise is provided in a one-can-two-channel type combustion apparatus having a structure for controlling the intermittent combustion of the burner during the other function alone operation. An example of a unique control configuration provided with is described.

That is, in the fifth embodiment, as shown in FIG. 5, the control device 14 includes a combustion amount control unit 20, an ignition control unit 21, a data storage unit 25, a normal fan air volume control unit 26, and other components. Function independent operation monitoring unit 35 and intermittent combustion control unit 3
6 and a fan volume control unit 37 for preventing resonance noise.

The combustion amount control unit 20, the ignition control unit 21, the data storage unit 25, and the normal fan air volume control unit 26 correspond to the combustion amount control unit 20 and the ignition control unit 21 shown in each of the above embodiments.
, The data storage unit 25 and the normal fan air volume control unit 26 have the same configuration, and the duplicated description of the common part is omitted here.

The other function single operation monitoring section 35 has a configuration for monitoring whether or not another function single operation is being performed.
In addition, there are various methods for monitoring whether or not the independent operation of the other function is being performed. Here, any of the methods can be adopted, and the description thereof is omitted.

The data storage unit 25 stores an off-temperature for preventing the staying water in the hot-water supply heat exchanger 7 from rising to a high temperature close to boiling during the other-function alone operation, and the off-temperature. A lower ON temperature is predetermined.

When the intermittent combustion control unit 36 detects that the other function alone operation is being performed based on the monitoring information taken from the other function independent operation monitoring unit 35, the intermittent combustion control unit 36 detects the hot water temperature in the heat exchanger. The stored stagnant water temperature in the hot water supply heat exchanger 7 is fetched every moment and the detected stagnant water temperature is compared with the off-temperature of the data storage unit 25 to determine whether the detected stagnant water temperature is equal to or higher than the off-temperature. As a result of this comparison, when it is detected that the detected staying hot water temperature is equal to or higher than the above-mentioned off-temperature, the combustion of the burner 2 is stopped.

Further, the intermittent combustion control unit 36 compares the stayed hot water temperature detected by the hot water temperature detecting means 18 in the heat exchanger with the ON temperature of the data storage unit 25 during the interruption of the burner 2 combustion, and It is determined whether or not the hot water temperature is equal to or lower than the ON temperature. When it is detected from the result of the comparison that the detected stagnant hot water temperature has dropped to or lower than the ON temperature, the burner 2 is restarted to burn. Intermittent combustion is controlled.

In the fifth embodiment, the most characteristic resonance sound preventing fan air volume control unit 37 supplies the fuel gas supplied to the burner 2 according to the required combustion amount during a predetermined resonance sound preventing period. Normal fan air volume control data L corresponding to volume
A configuration is provided in which the fan airflow is increased more than the fan airflow at st and the ratio of the fan airflow to the supplied fuel gas amount (air-fuel ratio) is made larger than the normal air-fuel ratio to suppress the generation of resonance noise.

That is, in the fifth embodiment, the combustion of the burner 2 is controlled by the intermittent combustion control of the burner 2 by the intermittent combustion control unit 36 after the ignition of the burner 2 is performed by the other function alone operation as the resonance sound prevention period. The first combustion ON period until the operation is interrupted and the second combustion ON period are given.

The fan air volume control unit 37 for preventing the resonance sound.
Detects that an ignition completion signal that indicates that the burner 2 has been ignited has been output from the ignition control unit 21, and based on the monitoring information fetched from the other function independent operation monitoring unit 35, When it is detected that the ignition of the burner is a burner ignition for starting the other function independent operation, it is determined that the first combustion ON period due to the intermittent combustion has been started, and a predetermined resonance sound is set in order to prevent generation of the resonance sound. The rotation of the combustion fan 3 is controlled so that the prevention fan air volume is supplied to the burner 2.

In the fifth embodiment, the amount of fan air for preventing resonance in the first combustion ON period is determined by the burner 2.
The fan airflow is increased by a predetermined ratio (for example, 10%) from the fan airflow of the normal fan airflow control data Lst corresponding to the amount of fuel gas supplied to the fan.

If it is assumed that the required combustion amount varies during the other function alone operation, for example, the combustion amount control unit 2
From 0, the amount of fuel gas supplied to the burner 2 according to the required combustion amount is detected every moment, and the fan air volume of the normal fan air volume control data Lst corresponding to the detected amount of supplied fuel gas is stored in the data storage unit 25. It is determined based on the normal fan air volume control data Lst, and by detecting a fan air volume increased by a predetermined ratio from the obtained fan air volume,
The above-mentioned resonance-wind preventing fan air volume control unit 37 can obtain the above-mentioned resonance-wind preventing fan air volume, and the rotation of the combustion fan 3 so that the resonance-air prevention fan air volume thus obtained is supplied to the burner 2. Perform control.

If the burner 2 burns at a predetermined fixed combustion amount during the other function alone operation, the above-described resonance air flow is determined in advance. The fan air volume for prevention is stored in the data storage unit 25, and the fan air volume control unit 37 for resonance sound prevents the fan air volume for resonance sound stored in the data storage unit 25 from being supplied to the burner 2. Then, the rotation of the combustion fan 3 is controlled.

When the second fan-on control unit 37 detects the start of the second combustion-on period due to the intermittent combustion based on the operation information fetched from the intermittent combustion control unit 36, the resonance-prevention fan airflow control unit 37 determines whether the second combustion-on period has started. The rotation control of the combustion fan 3 is performed so that the fan air volume for resonance prevention, which is smaller than the fan air volume for resonance sound prevention, is supplied to the burner 2.

For example, a ratio (for example, 5%) for increasing the fan airflow in the second combustion-on period that is smaller than a ratio for increasing the fan airflow (for example, 10%) determined for the first combustion-on period is predetermined. In the meantime, during the second combustion ON period, the fan airflow during the second combustion ON period is larger than the fan airflow of the normal fan airflow control data Lst corresponding to the amount of fuel gas supplied to the burner 2 according to the required combustion amount. The rotation control of the combustion fan 3 is performed so that the fan air volume increased by the proportion of the fan is supplied to the burner 2.

When the second combustion ON period due to the intermittent combustion ends, the resonance sound prevention fan air volume control unit 37 sends a signal to the normal fan air volume control unit 26 informing that the resonance air volume control for preventing resonance noise has ended. During the combustion-on period due to the intermittent combustion after receiving the output and this signal, the rotation control of the combustion fan 3 in the normal fan air volume control mode by the normal fan air volume control unit 26 is performed.

According to the fifth embodiment, during the predetermined resonance preventing period after the burner 2 is ignited by the other function alone operation, the normal fan air volume control data Lst
The rotation of the combustion fan 3 is controlled such that a larger fan air flow than the fan air flow is supplied to the burner 2 based on
Since the burner combustion is performed with the air-fuel ratio that can prevent the generation of resonance noise larger than the normal air-fuel ratio, the resonance noise generation is performed in the same manner as in each of the above-described embodiments while the other function alone is operating. Can be prevented.

During the independent operation of the other functions after the end of the resonance prevention period, the rotation control of the combustion fan 3 in the normal fan air volume control mode by the normal fan air volume control unit 26 is performed. It is possible to avoid the adverse effects caused by the burner combustion being continued for a long time at a larger air-fuel ratio.

Further, the combustion equipment warms as time elapses after the burner 2 is ignited, and resonance noise can be prevented even if the deviation of the air-fuel ratio from the normal air-fuel ratio is reduced. As in the example of the embodiment, by reducing the fan volume for resonance prevention during the second combustion-on period from the fan volume for resonance prevention during the first combustion-on period, it is possible to prevent the generation of resonance and reduce the amount of resonance sound. Thus, the defective state of burner combustion during the second combustion ON period can be reduced.

Hereinafter, a sixth embodiment will be described. The sixth embodiment is directed to the above-described one-can-two-channel-type combustion device. The inventor has noticed that resonance noise can be prevented when the combustion amount of the burner 2 is suppressed to a small value. Therefore, in the sixth embodiment, the combustion amount of the burner is accurately controlled to the required combustion amount. During the isolated operation of another function that does not cause a major problem at all, during the period in which the resonance may occur, the combustion amount is suppressed to a predetermined combustion amount for preventing the resonance sound to prevent the generation of the resonance sound. With control configuration. In the description of the sixth embodiment, the same components as those of the above embodiments are denoted by the same reference numerals, and redundant description of the common portions will be omitted.

As shown in FIG. 6, the characteristic control structure of the sixth embodiment is that the combustion amount control unit 20, the ignition control unit 21, the data storage unit 25, the other function independent operation monitoring unit 35 It is configured to include a combustion control unit for noise prevention 40 and a variable off-temperature setting unit 41. The combustion amount control unit 20, the ignition control unit 21, the data storage unit 25, the other function independent operation monitoring unit 35, and the intermittent combustion control unit 36 correspond to the combustion amount control unit 20 and the ignition Control unit 21, data storage unit 25, and other function independent operation monitoring unit 3
5 and the configuration of the intermittent combustion control unit 36 are substantially the same, and in the sixth embodiment, the overlapping description of the common parts is omitted.

The resonance amount preventing combustion amount control unit 40 detects that the ignition completion signal has been output from the ignition control unit 21 and, based on the monitoring information taken from the other function independent operation monitoring unit 35, ignites the burner 2. Is detected by the other function alone operation, the burner 2 is burned with a predetermined amount of resonance sound preventing combustion until a predetermined resonance sound preventing control end condition is satisfied. Then, the control of the opening degree of the proportional valve 6 is performed to control the combustion amount of the burner 2.

The combustion amount for preventing the resonance sound is a combustion amount capable of suppressing the resonance sound, and is appropriately set in advance based on experimental results and the like. For example, when a configuration is provided in which variable control of the combustion amount of the burner 2 is performed within a predetermined combustion amount variable range, the minimum combustion amount in the combustion amount variable range or the combustion amount in the vicinity thereof is reduced. It may be determined as the combustion amount for preventing the resonance noise.

Alternatively, for example, after the burner is ignited by the other function alone operation, combustion is performed at a predetermined combustion amount R1,
Thereafter, when a predetermined time has elapsed, the combustion amount R1
Therefore, in the case where the combustion amount is increased to the combustion amount R2 larger than the combustion amount R1, and the burner 2 is burned, the combustion amount R1 may be determined as the combustion amount for preventing resonance. is there.

Alternatively, the combustion amount Rk of the mild ignition data shown in FIG. 2 may be determined as the combustion amount for preventing resonance. As described above, the combustion amount Rk of the mild ignition data is determined as the combustion amount for preventing resonance noise, and when the burner combustion is performed at the combustion amount for preventing resonance sound, the fan airflow Fk of the mild ignition data is set to the burner 2. To be supplied to the combustion fan 3
The rotation control of is performed. That is, even after the burner 2 is ignited based on the slow ignition data, the burner 2 is continuously burned with the combustion amount Rk and the fan airflow Fk of the slow ignition data.

The above-mentioned condition for terminating the control for preventing resonance is a condition under which it is possible to judge that it is no longer necessary to perform the specific control for suppressing the generation of resonance. It is conceivable that, for example, the end of the initial combustion ON period of the intermittent combustion by the other function alone operation is given as the resonance sound prevention control end condition, for example.

Alternatively, when the predetermined resonance sound preventing time has elapsed since the burner 2 was ignited, and before the resonance sound preventing time has elapsed, the first combustion ON period of the intermittent combustion by the other function alone operation is performed. Is performed as a condition for terminating the resonance sound prevention control.

The resonance amount preventing combustion amount control unit 40 operates between the time when the burner 2 is ignited by the other function alone operation and the time when the above-described predetermined condition for terminating the resonance preventing control is satisfied. The burner 2 is caused to burn with the amount of combustion for preventing resonance, thereby preventing resonance. Then, after it is determined that the resonance ending control termination condition is satisfied and that there is no fear of occurrence of resonance, the process proceeds to the combustion amount control by the combustion amount control unit 20.

In the sixth embodiment, as described above, the amount of combustion is suppressed during a period in which there is a possibility that resonance noise may occur.
The amount of heat applied to the heat sink 7 is reduced, and there is a concern that a problem caused by the reduced amount of heat may occur. Therefore, in the sixth embodiment, an off-temperature variable setting unit 41 is provided. The off-temperature variable setting section 41 detects that the combustion control is performed by the resonance prevention combustion amount controller 40 based on the operation information taken from the resonance prevention combustion amount controller 40. At times, the off-temperature used for intermittent combustion is variably set higher, for example, by a predetermined temperature.

The intermittent combustion control unit 36 uses the off-temperature variably set by the off-temperature variable setting unit 41 during the period in which the combustion amount control by the resonance amount preventing combustion amount control unit 40 is being performed. As described above, the intermittent combustion control of the burner 2 is performed.

As described above, by raising the off-temperature used for the intermittent combustion, the combustion on period of the intermittent combustion is lengthened. As a result, even if the amount of combustion is suppressed in order to prevent the above resonance noise, It is possible to suppress a decrease in the amount of heat given to the other function heat exchanger 17 during the period when the amount of combustion is suppressed.

For example, when a bath reheating function, which is another function, is provided, after the burner 2 is ignited by the reheating alone operation, the combustion amount for preventing the resonance sound as described above is reduced. When the suppression control is performed, the time until the bath boils may be long, but as described above, the off-temperature used for the intermittent combustion is increased, so that the combustion-on period of the intermittent combustion is increased. Therefore, it is possible to prevent the boiling time of the bath from being lengthened. Of course, as described above, the increased off-temperature is an off-temperature that can prevent the staying water in the hot-water supply heat exchanger 7 from rising to a high temperature close to boiling. However, the problem of high-temperature hot water supply can be avoided.

According to the sixth embodiment, during the period of avoiding the resonance generation after the burner is ignited by the other function alone operation, the combustion amount of the burner 2 is suppressed to the combustion amount for preventing the resonance sound and the burner combustion is performed. Is performed, the resonance noise during the other function alone operation can be prevented. Further, in the sixth embodiment, as described above, the combustion amount is suppressed to the combustion amount for preventing the resonance noise during the other function alone operation, but as in the hot water supply operation during the other function alone operation. It is not necessary to precisely control the temperature of the hot water flowing out of the heat exchanger, so that there is no problem of deterioration of the hot water temperature control performance such that hot water at the hot water set temperature is not supplied.

Further, in the sixth embodiment, the variable off-temperature setting section 41 is provided, and the variable off-temperature setting section 41 controls the combustion amount by the resonance amount preventing combustion amount control section 40. During this period, the off-temperature used for intermittent combustion is raised to increase the off-temperature. However, as a result of the longer combustion-on period due to the intermittent combustion, it is possible to suppress a decrease in the amount of heat given to the other-function heat exchanger 17 during the above-mentioned resonance sound generation avoidance period, and to reduce the amount of heat given to the other-function heat exchanger 17. Problems caused by the decrease can be prevented.

Note that the present invention is not limited to the above embodiments, but can adopt various embodiments. For example, in each of the above embodiments, the ignition control unit 21, the normal fan air volume control unit 26, and the resonance air flow fan air volume control unit 2
8, 37 perform the rotation control of the combustion fan 3 using the fuel gas amount supplied to the burner 2, but as the fuel gas amount information, the valve opening information of the proportional valve 6 corresponding to the fuel gas amount ( For example, the rotation control of the combustion fan 3 may be performed using the proportional valve current value). In this case, data on the relationship between the fan airflow and the proportional valve current as information on the fuel gas amount is given as fan airflow control data.

Further, in each of the first to fourth embodiments, the combustion equipment provided with only the hot water supply function has been described as an example. However, for example, in each of the first to fourth embodiments, The control configuration shown can be applied to, for example, a two-can, two-channel combustion device or a one-can, two-channel combustion device provided with functions other than hot water supply in addition to the hot water supply function.

Further, in the case of a multifunction type combustion apparatus having a hot water supply function and functions other than hot water supply, for example,
During the hot water supply alone operation, as shown in the first to fourth embodiments, the fan airflow is increased from the fan airflow based on the normal air-fuel ratio to increase the air-fuel ratio of burner combustion to be larger than the normal air-fuel ratio. Thus, the occurrence of resonance may be prevented, and during the operation of the other function alone, the amount of combustion may be suppressed to prevent the occurrence of resonance, as shown in the sixth embodiment.

Further, in each of the above embodiments, the resonance sound generation avoiding time variable setting section 22 variably sets the resonance sound generation avoiding time based on a combination of the outside air temperature detected by the outside air temperature detecting means 16 and the required combustion amount. However, for example, instead of the required combustion amount, a proportional valve current value corresponding to the required combustion amount is used, and the resonance sound generation avoiding time variable setting unit 22 determines the proportional valve current value and the outside air temperature detecting means 16. The resonance sound generation avoidance time may be variably set according to the combination with the detected outside air temperature.

Further, as described above, the resonance sound generation avoiding time variable setting section 22 variably sets the resonance sound generation avoiding time based on the combination of the outside air temperature detected by the outside air temperature detecting means 16 and the required combustion amount. However, when the required combustion amount is substantially determined as in the case where the predetermined variable control range of the combustion amount is narrow, the resonance generation avoidance time variable setting unit 22 is used.
The configuration may be such that the resonance sound generation avoidance time is variably set in consideration of only the detected outside air temperature of the outside air temperature detection means 16 and the required combustion amount.

Furthermore, in each of the above embodiments, the resonance sound avoidance time variable setting unit 22 and the resonance sound avoidance determination unit 24
Is provided, the resonance sound generation avoidance determination unit 24
Is configured to determine that the resonance generation avoidance condition is satisfied when the resonance generation avoidance time variably set by the resonance generation avoidance time variable setting unit 22 has elapsed since the burner 2 was ignited. A predetermined fixed resonance sound generation avoidance time is given, and the resonance sound generation avoidance determination unit 24 sets the resonance sound generation avoidance time when the fixed resonance sound generation avoidance time elapses after the burner 2 is ignited. It may be configured to determine that the condition is satisfied. In this case, the resonance sound avoidance time variable setting unit 22 can be omitted.

Further, in each of the above embodiments, the fan air volume control mode switching section 27 changes the rotation control mode of the combustion fan 3 to the resonance air volume control when the resonance generation avoidance condition is satisfied. Although the resonance sound prevention mode by the unit 28 has been switched to the normal fan air volume control mode by the normal fan air volume control unit 26, for example, the fan air volume control mode switching unit 27 starts from when it is determined that the resonance sound generation avoidance condition is satisfied. The configuration may be such that the rotation control mode of the combustion fan 3 is switched when a predetermined time has elapsed.

Further, in the third embodiment, the resonance sound prevention fan air flow control data variable setting unit 31 sets the resonance sound prevention fan air flow control data based on predetermined resonance sound prevention fan air flow control data calculation data. Although the air volume control data has been determined, for example, the resonance air volume control data variable setting unit 31 determines whether or not the resonance sound is generated when the burner ignition is performed, as shown in the second embodiment. The determination data may be obtained, and data obtained by performing a parallel movement in the fan air flow increasing direction by a predetermined amount from the obtained resonance sound generation presence / absence determination data may be set as resonance air prevention fan air flow control data.

Further, in the fifth embodiment, the fan air volume for preventing resonance in the second combustion ON period is smaller than the fan air volume for the second combustion ON period in the intermittent combustion in the first combustion ON period in the other function alone operation. However, for example, the fan air volume for preventing resonance in the first combustion ON period may be equal to the fan air volume for preventing resonance in the second combustion ON period.

Further, in the fifth embodiment, the first combustion ON period and the second combustion ON period in the intermittent combustion are defined as the resonance prevention period. However, there is a possibility that the resonance generation may occur in the resonance prevention period. This is a certain period, and the period is appropriately set according to the combustion capacity during other functions alone operation, the assumed installation state of the combustion equipment, and the like.For example, only the first combustion ON period in the intermittent combustion prevents resonance noise. The period may be set as a period, or a period until the third or subsequent predetermined combustion on period ends may be set as the resonance preventing period. Further, a period from when the burner ignition is performed by the other function alone operation to when a predetermined time elapses may be set as the resonance preventing period.

Further, in the sixth embodiment, the off-temperature variable setting section 41 is provided, and when the combustion amount control is performed by the resonance amount preventing combustion amount control section 40, the off-temperature variable setting section 41 is provided. Thus, there has been provided a configuration in which the off-temperature used for intermittent combustion is variably set in a direction in which the off-temperature is increased. In such a case, the variable off-temperature setting section 41 may be omitted.

[0136]

According to the present invention, in a period in which there is a risk that the combustion equipment may generate a resonance sound, the air-fuel ratio of the burner combustion is made larger than the normal air-fuel ratio to prevent the combustion equipment from generating the resonance sound. In the configuration provided with the configuration for performing the rotation control of the combustion fan, during a period when there is a possibility that resonance noise is generated,
Since burner combustion is performed at an air-fuel ratio that can prevent resonance noise, generation of resonance noise can be avoided. Further, during the period when the resonance is likely to occur, the fuel gas amount corresponding to the required combustion amount is supplied to the burner. Therefore, as described above, the resonance can be prevented from being generated and the burner combustion can be prevented. As a result, the required combustion amount can be obtained.

When the resonance generation avoidance time has elapsed since the burner ignition was performed, it is determined that the resonance generation avoidance condition has been satisfied, and based on the determination result, the rotation control mode of the combustion fan is changed to the resonance prevention. In the system with a configuration that switches from the mode to the normal fan air volume control mode, the timing of mode switching can be determined with a simple control configuration, and the rotation control mode of the combustion fan changes from the resonance prevention mode to the normal fan air volume control mode. Can be switched.

[0138] Further, in the apparatus having a configuration for variably setting the above-described resonance sound generation avoiding time based on at least the outside air temperature of the outside air temperature and the required combustion amount detected by the outside air temperature detecting means, Since the length of the period during which resonance may occur varies depending on the degree of cooling of the combustion equipment according to the outside air temperature, the resonance generation avoidance time should be variably set according to the change in the period. Thus, the rotation control mode of the combustion fan can be switched from the resonance prevention mode to the normal fan air volume control mode at a more appropriate timing.

After the ignition of the burner, resonance sound occurrence / non-judgment data for judging whether or not resonance sound is likely to be generated is obtained every moment, and the rotation control of the combustion fan is performed based on the resonance sound occurrence / non-occurrence judgment data. When the mode for switching the mode from the resonance prevention mode to the normal fan air volume control mode is determined, the timing for switching the rotation control mode of the combustion fan according to the warming condition of the combustion equipment after the burner ignition. It is possible to determine whether the resonance control mode of the combustion equipment is too early to cause resonance due to the switching of the rotation control mode, or too long to control the rotation of the combustion fan in the resonance prevention mode because the switching is too slow. This can prevent the problem that adverse effects are caused by this.

In the apparatus having a configuration for variably setting the fan air volume control data for preventing resonance noise based on the outside air temperature detected by the outside air temperature detecting means, depending on the degree of cooling of the combustion equipment according to the outside air temperature. In consideration of the fact that the amount of deviation between the optimum air-fuel ratio that can prevent resonance when the burner is ignited and the normal air-fuel ratio changes, the resonance sound prevention fan air volume control data can be variably set. In this way, by variably setting the resonance sound prevention fan air volume control data, when the outside air temperature around the combustion equipment is high, the burner combustion during rotation control of the combustion fan based on the resonance sound prevention fan air volume control data is performed. The difference between the air-fuel ratio and the normal air-fuel ratio can be reduced, resonance noise can be prevented, and burner combustion can be performed in a substantially favorable state.

[0141] After the burner ignition is performed, the fan air volume control data for preventing resonance noise is variably set stepwise or continuously in a direction to match the normal fan air volume control data. Since the combustion equipment warms up as time elapses after the burner ignition is performed, resonance noise can be prevented as time elapses after the burner ignition is performed. Shifts in the direction of decreasing. It is possible to variably set the fan air volume control data for preventing resonance noise in accordance with the change in the amount of deviation, and to approach the burner combustion state to a normal good state over time while preventing resonance noise. Can be.

In a one-can two-channel type combustion device, during a period in which resonance is likely to occur due to the independent operation of other functions, a fan for preventing resonance noise which is larger than the fan air volume based on the normal fan air volume control data is used. In the apparatus provided with a configuration for controlling the rotation of the combustion fan so that the air volume is supplied to the burner, the resonance sound can be prevented during a period in which the resonance sound is likely to occur during the independent operation of the other functions. As described above, the air-fuel ratio of burner combustion can be made larger than the normal air-fuel ratio, so that resonance noise can be prevented.

[0143] In the one-can-two-channel-type combustion device, the burner combustion is performed with a predetermined combustion amount for preventing resonance noise during a period in which resonance noise is likely to occur due to the independent operation of other functions. Since the resonance can be prevented by suppressing the combustion amount, the combustion amount of the burner is reduced during the period when there is a possibility that the resonance sound may occur during the other operation alone. , Resonance noise can be prevented. Also, during the other function alone operation, as described above during the other function alone operation, since there is no great problem even if the burner combustion amount is not accurately controlled to the required combustion amount as in the hot water supply operation, the combustion does not occur. Even if the amount is suppressed, the resonance noise can be prevented without any problem such as the hot water temperature becoming lower than the desired hot water temperature.

When the combustion amount control for suppressing the combustion amount is performed to prevent the resonance sound, the system provided with a structure for increasing the off-temperature used for the intermittent combustion control is provided with a structure for preventing the resonance sound. Since the off-temperature increases during the combustion amount control for performing the combustion, the combustion-on period of the intermittent combustion can be lengthened. From this, it is possible to alleviate a decrease in the amount of heat given to the other function heat exchanger during the resonance prevention period, and to avoid a problem caused by a decrease in the amount of heat given to the other function heat exchanger.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of a characteristic control configuration in each of first, third, and fourth embodiments.

FIG. 2 is a graph showing an example of normal fan air volume control data, fan air volume control data for preventing resonance sound, and resonance sound occurrence / non-execution determination data;

FIG. 3 is a graph showing an example of data for obtaining a resonance sound avoidance time.

FIG. 4 is a block diagram showing an example of a characteristic control configuration in each of the second, third, and fourth embodiments.

FIG. 5 is a block diagram showing an example of a characteristic control configuration in a fifth embodiment;

FIG. 6 is a block diagram illustrating an example of a characteristic control configuration according to a sixth embodiment;

FIG. 7 is a model diagram schematically illustrating an example of a water heater that is a combustion device.

FIG. 8 is a model diagram schematically illustrating an example of a one-can-two-water-channel type combustion device.

[Explanation of symbols]

 2 Burner 3 Combustion fan 7 Hot water supply heat exchanger 14 Control device 16 Outside temperature detecting means 17 Other function heat exchanger 18 Heat exchanger internal hot water temperature detecting means 22 Resonance sound generation avoidance time variable setting unit 24 Resonance sound generation avoidance judgment unit 26 Normal Fan air volume control unit 27 Fan air volume control mode switching unit 28, 37 Resonance sound prevention fan air volume control unit 30 Resonance sound generation presence / absence judgment data detection unit 31 Resonance noise prevention fan air volume control data variable setting unit 32 Fan air volume data variable unit 36 Intermittent combustion control unit 40 Resonance noise prevention combustion amount control unit 41 Off temperature variable setting unit

Claims (11)

[Claims] A combustion fan for supplying and discharging burner combustion is provided, and a ratio of a fan air flow rate by a rotational drive of the combustion fan to an amount of fuel gas supplied to the burner becomes a predetermined normal air-fuel ratio. The relation data between the supplied fuel gas amount information and the fan air amount information is given as normal fan air amount control data, and the rotation of the combustion fan during the burner combustion in the normal fan air amount control mode based on the normal fan air amount control data. In a combustion device provided with a normal fan air volume control unit for performing control, the ratio of the fan air volume to the amount of fuel gas supplied to the burner according to the required combustion volume is made larger than the normal air-fuel ratio to cause the combustion device to generate resonance noise. The relationship data between the supplied fuel gas volume information and the fan air volume information to suppress the generation of air is used as fan air volume control data for resonance prevention. A resonance sound prevention fan air volume control unit for controlling the rotation of the combustion fan in a resonance prevention mode based on the predetermined resonance air flow data; and the fan air volume control after the burner ignition The unit controls the rotation of the combustion fan in the resonance sound prevention mode, and after the predetermined resonance sound generation avoidance condition is satisfied, the rotation of the combustion fan in the normal fan air volume control mode is controlled by the normal fan air volume control unit. And a switching unit for switching the fan air volume control mode. 2. A resonance sound generation avoidance judging unit for judging that resonance sound generation avoidance conditions are satisfied when a predetermined resonance sound generation avoidance time has elapsed since the burner ignition was performed. The combustion device according to claim 1, wherein: 3. An outside air temperature detecting means for detecting an outside air temperature around the combustion equipment; and a resonance based on at least the detected outside air temperature of the outside air temperature detected by the outside air temperature detecting means and the required combustion amount information. The combustion apparatus according to claim 2, further comprising: a resonance sound generation avoiding time variable setting unit that variably sets a sound generation avoiding time. 4. An outside air temperature detecting means for detecting an outside air temperature around the combustion equipment; and based on information on an outside air temperature detected by the outside air temperature detecting means and information on an elapsed time since the burner ignition was performed. Resonance sound generation presence / absence determination data, which is obtained from time to time, which determines the resonance sound presence / absence determination data, which is data relating to the supplied fuel gas amount information and the fan air volume information, for determining whether or not the combustion equipment is likely to emit resonance sound. A detector for comparing the fan air volume information of the normal fan air volume control data corresponding to the information of the amount of fuel gas supplied to the burner in accordance with the required combustion amount with the fan air volume information of the above-mentioned resonance sound generation presence / absence determination data, Resonance sound generation avoidance judgment that judges that the resonance sound generation avoidance condition is satisfied when it is judged that the fan air amount information of the resonance sound occurrence presence / absence judgment data is smaller than the fan air amount information of the control data The combustion device according to claim 1, further comprising: a cut portion. 5. An outside air temperature detecting means for detecting an outside air temperature around the combustion equipment, wherein the outside air temperature detecting means for suppressing the combustion equipment from generating resonance sound based on the outside air temperature detected by the outside air temperature detecting means. 5. A resonance sound prevention fan air volume control data variably setting unit for variably setting resonance air air flow control data.
The combustion device according to any one of the above. 6. A fan air volume control data variable unit that varies stepwise or continuously in a direction in which the fan air volume control data for preventing resonance noise matches the normal fan air volume control data after the burner ignition is performed. The combustion device according to any one of claims 1 to 5, wherein 7. A hot water supply heat exchanger for hot water supply and another function heat exchanger for other functions other than hot water supply are provided integrally, and a burner for burning and heating these integrated heat exchangers in common is provided. The combustion apparatus according to any one of claims 1 to 6, wherein the combustion apparatus is a one-can-two-water-channel type combustion apparatus. 8. A burner which is provided integrally with a hot water supply heat exchanger for hot water supply and another function heat exchanger for other functions other than hot water supply, and which burns and heats these integrated heat exchangers in common. A combustion fan for supplying / exhausting burner combustion is provided; an intermittent combustion control unit for performing on / off control of burner combustion during operation of the other function alone is provided; Relational data between the supplied fuel gas amount information and the fan air amount information so that the ratio of the fan air amount due to the rotational driving of the combustion fan becomes a predetermined normal air-fuel ratio is given as normal fan air amount control data, and the burner is burning. In the one-can-two-channel type combustion device having a configuration for controlling the rotation of the combustion fan based on the normal fan air volume control data, after the burner ignition is performed by the other function alone operation During the resonance prevention period including at least the initial combustion ON period until the burner combustion is interrupted by the intermittent combustion control unit, the normal fan air volume control data corresponding to the fuel gas supply information to the burner according to the required combustion amount. A combustion device provided with a resonance sound prevention fan air volume control unit that controls the rotation of a combustion fan so that a resonance air volume fan air volume greater than the fan air volume is supplied to the burner. 9. The first combustion ON period and 2 in intermittent combustion
The second combustion on period is defined as the resonance prevention period, and the resonance air flow control unit controls the combustion fan so that the resonance air prevention fan air volume during the second combustion on period is smaller than that during the first combustion on period. 9. The combustion apparatus according to claim 8, wherein the rotation control is performed. 10. A hot water supply heat exchanger for hot water supply and another function heat exchanger for other functions other than hot water supply are provided integrally, and a burner is provided for commonly burning and heating these integrated heat exchangers. However, in a one-can, two-channel combustion device provided with an intermittent combustion control unit for performing on / off control of burner combustion during other function alone operation, the intermittent operation is performed after the burner ignition is performed by the other function alone operation. During the first combustion ON period until the burner combustion is interrupted by the combustion control unit, resonance for performing burner combustion with a predetermined amount of resonance sound prevention combustion until a predetermined resonance sound prevention control end condition is satisfied. Combustion equipment provided with a combustion control unit for noise prevention. 11. A hot water temperature detector in the heat exchanger for detecting hot water temperature in the hot water supply heat exchanger, and the intermittent combustion control unit detects the hot water temperature in the hot water supply heat exchanger detected by the hot water temperature detector in the heat exchanger. The burner combustion is stopped when the hot water temperature rises above a predetermined off-temperature, and the burner combustion is restarted when the detected hot water temperature in the hot water supply heat exchanger falls below the predetermined on-temperature. 11. The combustion apparatus according to claim 10, further comprising an off-temperature variable setting unit that increases the off-temperature when the combustion amount control is performed by the noise-prevention combustion amount control unit.