JP3674977B2 - Combustion equipment - Google Patents

Combustion equipment Download PDF

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Publication number
JP3674977B2
JP3674977B2 JP03518595A JP3518595A JP3674977B2 JP 3674977 B2 JP3674977 B2 JP 3674977B2 JP 03518595 A JP03518595 A JP 03518595A JP 3518595 A JP3518595 A JP 3518595A JP 3674977 B2 JP3674977 B2 JP 3674977B2
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Japan
Prior art keywords
rotation speed
front plate
blower
detection device
fuel
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Expired - Fee Related
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JP03518595A
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Japanese (ja)
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JPH08226644A (en
Inventor
洋一 木村
文孝 菊谷
順一 植田
幸一 金崎
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Panasonic Corp
Panasonic Holdings Corp
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Panasonic Corp
Matsushita Electric Industrial Co Ltd
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Priority to JP03518595A priority Critical patent/JP3674977B2/en
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  • Regulation And Control Of Combustion (AREA)

Description

【0001】
【産業上の利用分野】
本発明は、ガス及び石油を気化させたガスを燃焼する給湯器や暖房器などに用いられる燃焼装置に関するものである。
【0002】
【従来の技術】
従来より、燃焼装置は、給気口を備えた前板と本体ケースからなるケーシング内に比例制御弁等の燃料制御装置を使用してバーナ部で燃焼する燃料を可変するとともに、燃料制御装置で供給する燃料に対応した目標回転数で送風機を自動制御する回転数制御装置で制御してバーナ部に適切な空気量を供給することで安定な燃焼状態を得ることができていた。また、燃焼装置の前板の給気口を小さくしたり、消音材等を取り付けたりして燃焼装置で発生する音を遮音したり消音して燃焼装置の低騒音化をおこなっていた。
【0003】
【発明が解決しようとする課題】
しかしながら近年、燃焼装置の小型化・高密度化や低NOx化に伴い、安定な燃焼状態で燃料が燃焼する範囲が狭くなっている。また、燃焼装置の低騒音化に伴い、燃焼装置の前板の給気口を小さくしたり、消音材等を取り付けたりして燃焼装置で発生する音を遮音したり消音する必要があるが、一方前板を通過する空気の抵抗が大きくなって、燃料に対応した目標回転数で送風機を自動制御しても前板が開放されている時と閉塞されている時で供給される空気量が異なってくる。
【0004】
具体的には、前板が本体ケースから取り外されている時は前板が本体ケースに取り付けられている時に比べて送風機の給気抵抗が小さくなるため目標回転数で送風機を回転させると燃料が安定な状態で燃焼するのに比較して過剰な空気量を供給することになる。
【0005】
従って、上記の従来の構成では、前板が閉塞されている時に安定な燃焼状態を得ることができる目標回転数で送風機を自動制御した場合、検査や修理のため前板が開放されている状態で燃焼装置を作動させた時、供給される空気量が多く炎が吹き消える問題があり、逆に前板が開放されている時に安定な燃焼状態を得ることができる目標回転数で送風機を自動制御した場合、前板が閉塞されている状態で燃焼装置を作動させた時、供給される空気量が少なく燃焼騒音が大きくなったり、振動燃焼が発生したりする問題があり、前板の給気口の形状や消音材の取付けが制約され、燃焼装置の低騒音化を実現することが困難であった。
【0006】
本発明は、上記従来の課題を解決するもので、前板の開閉状態にかかわらず、自動的に安定な燃焼状態を得ることができる回転数で送風機を自動制御するように送風機の回転数制御装置を改良することで、前板の給気口の形状や消音材の取付けの制約をなくして、燃焼装置の低騒音化を実現することを目的とする。
【0007】
【課題を解決するための手段】
上記の目的を達成するために、本発明の燃焼装置は給気口と消音材とを備えた前板と、本体ケースからなるケーシング内に、燃料を燃焼するバーナ部と、バーナ部に燃料を供給する燃料制御装置と、バーナ部に空気を供給する送風機と、燃料制御装置で供給する燃料に対応した目標回転数に送風機を自動制御する回転数制御装置とを備え、前板の開閉を検出する検出装置と、前記検出装置により前記前板が開放されている時には、目標回転数にある計算値を減算した回転数に送風機を自動制御する回転数補正装置を設けたものである。
【0008】
また、本発明の燃焼装置は回転数検出装置と回転数比較回路とケーシング外から識別できる表示装置とを備え、検出装置により前板が閉塞されている時には、検出装置の出力信号と回転数比較回路の回転数比較結果とを表示装置に表示させる表示回路を設けたものである。
【0009】
また、本発明の燃焼装置は回転数比較回路にタイマーを備え、検出装置により前板が閉塞されている時には、一定時間以上送風機の回転数と目標回転数とが一致しない場合、バーナ部に燃料の供給を停止する安全装置を設けたものである。
【0010】
【作用】
本発明は、前板の開閉を検出する検出装置により本体ケースと前板からなるケーシングの前板の状態を自動的に検出して、前板が閉塞されている時には、回転数制御装置により燃料制御装置で供給する燃料に対応した目標回転数に送風機を自動制御することで安定な燃焼状態を得ることができ、前板が開放されている時には、補正装置により回転数制御装置で設定される目標回転数にある計算値を減算した回転数に送風機を自動制御することで安定な燃焼状態を得ることができ、前板の開閉状態にかかわらず、自動的に安定な燃焼状態を得ることができるので前板の給気口の形状や消音材の取付けの制約がなくなり燃焼装置の低騒音化を実現することができる。
【0011】
また、第二の作用は、回転数検出装置と回転数比較回路とケーシング外から識別できる表示装置と表示回路を備え、検出装置により前板が閉塞されている時には、検出装置の出力信号を表示装置に表示するとともに、回転数検出装置で送風機の回転数を検出して回転数比較回路で実際の回転数と目標回転数とを比較し、予め設定された誤差範囲で回転していれば表示装置に表示することで、前板が閉塞されている時に送風機が目標回転数で回転していることが確認できるので、目標回転数にある計算値を減算した回転数が目標回転数より大幅に小さくなっても安全性が確保でき、前板の給気口の形状や消音材の取付けの制約がさらになくなり燃焼装置の低騒音化を実現することができる。
【0012】
また、第三の作用は、回転数比較回路にタイマーを備え、検出装置により前板が閉塞されている時には、一定時間以上送風機の回転数と目標回転数とが一致しない場合、バーナ部に燃料の供給を停止する安全装置を設けたことで、送風機の自動制御に異常が生じて前板が閉塞されている時に送風機が目標回転数にある計算値を減算した回転数で回転しても燃焼装置の破損を防止することができるので目標回転数にある計算値を減算した回転数が目標回転数より大幅に小さくなっても安全性が確保でき、前板の給気口の形状や消音材の取付けの制約がさらになくなり燃焼装置の低騒音化を実現することができる。
【0013】
【実施例】
図1は本発明の第一の実施例の燃焼装置の概略構成図を示すものである。
【0014】
図1において、給気口1と消音材2とを備えた前板3と、本体ケース4からなるケーシング5内にバーナ6と水加熱用の熱交換器7、バーナ6に燃料を供給する燃料供給装置8、燃焼用の空気を供給する送風機9、送風機の回転数を制御する回転数制御装置10、前板の開閉を検出する検出装置11とを内装している。熱交換器7には水量検出装置12と入水温検出装置13と出湯温検出装置14とが設けられている。燃料供給装置8は燃料供給量設定回路15、燃料通路を開閉する電磁弁16、燃料の供給量を制御する燃料制御装置17で構成されている。回転数制御装置10は目標回転数設定回路18、送風機駆動回路19、補正回路20で構成されている。検出装置11は、前板の開閉を検出するスイッチ等で前板3が本体ケース4に取り付けられている時にはONの信号を回転数制御装置10に出力し、前板3が本体ケース4から取り外されている時にはOFFの信号を回転数制御装置10に出力するものである。
【0015】
図2は本発明の第一の実施例の燃焼装置の作動フローチャートである。
以下、図2の作動フローチャートにそって本発明の第一の実施例の燃焼装置の作動を説明する。
【0016】
前板3が本体ケース4に取り付けられている時に出湯カラン等の開放により水流が生じると水量検出装置12が水の流れを検出し、水量検出装置12で検出した水量と入水温検出装置13で検出した入水温度から予め設定された出湯温度が得られるように燃料供給量設定回路15で燃料供給量が演算され、電磁弁16が開き、燃料制御装置17からバーナ6へ所定の燃料が供給されるとともに、検出装置11のON信号を回転数制御装置10が検出して、目標回転数設定回路18で燃料制御装置17で供給する燃料に対応して、前板3が本体ケース4に取り付けられている時に燃料が安定な状態で燃焼する適切な空気量を供給する目標回転数を設定して送風機駆動回路19を介して送風機を制御して目標回転数で回転させる。
【0017】
一方、前板3が本体ケース4から取り外されている時に出湯カラン等の開放により水流が生じると、検出装置11のOFFの信号を回転数制御装置10が検出して、補正回路20により上記目標回転数にある計算値を減算した補正回転数を設定して、送風機駆動回路19を介して送風機を制御して補正回転数で回転させる。
【0018】
従って、本発明の第一の実施例の燃焼装置によれば、前板3の開閉状態にかかわらず安定な燃焼状態を得ることができる回転数に自動的に送風機9を制御することで前板3の給気口1の形状を大幅に小さくし、消音材2を多量に用いて前板が開放されている時と閉塞されている時で供給される空気量が異なっても燃焼装置の燃焼不良を防止できるので、前板の給気口の形状や消音材の取付けの制約がなくなり燃焼装置の低騒音化を実現することができる。
【0019】
図3は本発明の第二の実施例の燃焼装置の概略構成図を示すものである。
第一の実施例の燃焼装置との相違点は前板3と本体ケース4からなるケーシング5内に回転数検出装置21とケーシング外から識別できる表示装置22を備えた点と回転数比較回路23と表示回路24とを備えた点である。表示装置22はLEDやランプ等である。
【0020】
図4は本発明の第二の実施例の燃焼装置の作動フローチャートである。以下、図4の作動フローチャートにそって本発明の第二の実施例の燃焼装置の作動を説明する。
【0021】
前板3が本体ケース4に取り付けられている時に出湯カラン等の開放により実際の給湯が開始されると、検出装置11のON信号を受けて表示回路24で表示装置22のLEDやランプ等を点灯さす。また、回転数制御装置10で送風機9を制御して目標回転数で回転させ、回転数検出装置21で送風機9の実際の回転数を検出して回転数比較回路23で目標回転数と比較して予め設定された誤差範囲で回転していれば表示装置22の他のLEDやランプ等を点灯さす。表示装置22はケーシング5外から識別できる構成になっているので表示装置22のLEDやランプ等の点灯・消灯は容易に確認することができ、表示装置22が両方点灯していれば燃焼装置は正常に動作していることが確認できる。また、前板3が本体ケース4に取り付けられている時に前板3の開閉を検出装置11が検出できていないことや、回転数制御装置10や送風機9の故障で送風機9が実際に目標回転数で回転していないことを容易に確認することが可能で、燃焼装置の異常を防止することができる。
【0022】
図5は本発明の第三の実施例の燃焼装置の概略構成図を示すものである。
第二の実施例の燃焼装置との相違点は回転数比較回路23にタイマーを設け、バーナ6に燃料の供給を停止する安全装置25を備えた点である。
【0023】
図6は本発明の第三の実施例の燃焼装置の作動フローチャートである。以下、図6の作動フローチャートにそって本発明の第三の実施例の燃焼装置の作動を説明する。
【0024】
前板3が本体ケース4に取り付けられている時に出湯カラン等の開放により実際の給湯が開始されると、検出装置11のON信号を受けて回転数制御装置10で送風機9を制御して目標回転数で回転させるとともに回転数検出装置21で送風機9の実際の回転数を検出して回転数比較回路23で目標回転数と比較して、一定時間経過しても、予め設定された誤差範囲に入らなければ、安全装置25が作動して電磁弁16を閉止して燃料通路を閉じてバーナ6への燃料の供給を停止する。第二、第三の実施例により燃焼装置の安全性を高めることができるので目標回転数にある計算値を減算した回転数が目標回転数より大幅に小さくなっても燃焼装置の安全性が確保でき、前板3の給気口1の形状や消音材2の取付けの制約がさらになくなり燃焼装置の低騒音化を実現することができる。
【0025】
【発明の効果】
以上説明したように本発明の第一の請求項における燃焼装置によれば次の効果が得られる。
【0026】
(1)前板に消音材を取り付けたり、給気口の開口面積を小さくして、燃焼装置の吸気回路の吸気抵抗を大きくして騒音をさげても、前板の開閉状態にかかわらず、自動的に安定な燃焼状態を得ることができる回転数に送風機を制御するので燃焼装置の低騒音が容易にできる。
【0027】
(2)送風機の自動制御に異常が生じて前板が閉塞されている時に送風機が目標回転数にある計算値を減算した回転数で回転しても燃焼装置の破損を防止することができるので目標回転数にある計算値を減算した回転数が目標回転数より大幅に小さくなっても安全性が確保でき、前板の給気口の形状や消音材の取付けの制約がさらになくなり、燃焼装置の吸気回路の吸気抵抗を大きくして騒音をさげることが可能になり、燃焼装置の低騒音化を実現することができる。
【0028】
(3)前板の開閉状態にかかわらず、自動的に安定な燃焼状態を得ることができるので、燃焼装置のTDRを大きくとることができるので少量の出湯が可能となり燃焼装置の使い勝手が良くなる。
【0029】
また、本発明の第二の請求項における燃焼装置によれば次の効果が得られる。
(1)表示装置により燃焼装置の検出装置の出力信号や送風機が実際に目標回転数で回転しているかどうかを容易に確認できるので、燃焼装置の吸気回路の吸気抵抗を大きくして騒音をさげても、燃焼装置の異常を防止することができ、燃焼装置の安全性を損なわず低騒音ができる。
【0030】
また、本発明の第三の請求項における燃焼装置によれば次の効果が得られる。
(1)送風機の回転数の比較に一定時間のタイマーを設けることで送風機の過渡的な回転数の変動や風などの外乱による瞬時的な回転数の変動が生じた時の安全装置の誤作動を防止できる。
【図面の簡単な説明】
【図1】本発明の第一の実施例における燃焼装置の概略構成図
【図2】同燃焼装置の作動フローチャート
【図3】本発明の第二の実施例における燃焼装置の概略構成図
【図4】同燃焼装置の作動フローチャート
【図5】本発明の第三の実施例における燃焼装置の概略構成図
【図6】同燃焼装置の作動フローチャート
【符号の説明】
1 給気口
2 消音材
3 前板
4 本体ケース
5 ケーシング
6 バーナ
8 燃料供給装置
9 送風機
10 回転数制御装置
11 検出装置
18 目標回転数設定回路
19 送風機駆動回路
20 補正回路
21 回転数検出装置
22 表示装置
23 回転数比較回路
24 表示回路
25 安全装置
[0001]
[Industrial application fields]
The present invention relates to a combustion apparatus used for a water heater or a heater that burns gas and gas obtained by vaporizing petroleum.
[0002]
[Prior art]
Conventionally, a combustion apparatus uses a fuel control device such as a proportional control valve in a casing composed of a front plate having a supply port and a main body case to vary the fuel burned in the burner unit, It has been possible to obtain a stable combustion state by supplying an appropriate amount of air to the burner section under the control of a rotational speed control device that automatically controls the blower at a target rotational speed corresponding to the supplied fuel. In addition, the noise of the combustion apparatus has been reduced by making the air supply port on the front plate of the combustion apparatus small, or by attaching a silencer or the like, to insulate or mute the sound generated by the combustion apparatus.
[0003]
[Problems to be solved by the invention]
However, in recent years, the range in which fuel is burned in a stable combustion state is becoming narrower as the combustion apparatus is reduced in size, density, and NOx. In addition, with the noise reduction of the combustion device, it is necessary to reduce or reduce the noise generated in the combustion device by reducing the air supply port of the front plate of the combustion device or attaching a silencer etc. On the other hand, the resistance of the air passing through the front plate increases, and even if the blower is automatically controlled at the target rotational speed corresponding to the fuel, the amount of air supplied when the front plate is open and closed Come different.
[0004]
Specifically, when the front plate is removed from the main body case, the air supply resistance of the blower is smaller than when the front plate is attached to the main body case. An excessive amount of air is supplied as compared to combustion in a stable state.
[0005]
Therefore, in the above-described conventional configuration, when the blower is automatically controlled at a target rotational speed capable of obtaining a stable combustion state when the front plate is closed, the front plate is opened for inspection and repair. When the combustion device is operated at, there is a problem that the amount of supplied air is large and the flame blows out, and conversely, when the front plate is opened, the blower is automatically operated at the target rotation speed that can obtain a stable combustion state When controlled, there is a problem that when the combustion device is operated with the front plate closed, there is a problem that the amount of supplied air is small and combustion noise increases or vibration combustion occurs. The shape of the air mouth and the mounting of the silencer were restricted, and it was difficult to achieve low noise in the combustion device.
[0006]
The present invention solves the above-described conventional problems, and controls the rotational speed of the blower so as to automatically control the blower at a rotational speed capable of automatically obtaining a stable combustion state regardless of the open / closed state of the front plate. An object of the present invention is to realize a reduction in noise of the combustion device by improving the device, eliminating the restriction of the shape of the air supply port of the front plate and the mounting of the silencer.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a combustion apparatus according to the present invention includes a front plate provided with an air supply port and a sound deadening material, a burner portion for burning fuel in a casing made of a main body case, and fuel for the burner portion. Equipped with a fuel control device to supply, a blower that supplies air to the burner section, and a rotation speed control device that automatically controls the blower to a target rotation speed corresponding to the fuel supplied by the fuel control device, and detects opening and closing of the front plate And a rotation speed correction device for automatically controlling the blower to the rotation speed obtained by subtracting the calculated value at the target rotation speed when the front plate is opened by the detection apparatus.
[0008]
The combustion apparatus of the present invention includes a rotation speed detection device, a rotation speed comparison circuit, and a display device that can be identified from outside the casing. When the front plate is closed by the detection device, the output signal of the detection device is compared with the rotation speed. A display circuit for displaying the result of comparison of the number of rotations of the circuit on the display device is provided.
[0009]
Further, the combustion apparatus of the present invention includes a timer in the rotation speed comparison circuit, and when the front plate is closed by the detection device, if the rotation speed of the blower and the target rotation speed do not coincide with each other for a certain time or longer, the fuel is supplied to the burner section. Is provided with a safety device for stopping the supply.
[0010]
[Action]
The present invention automatically detects the state of the front plate of the casing composed of the main body case and the front plate by a detection device that detects opening and closing of the front plate, and when the front plate is closed, the fuel is controlled by the rotation speed control device. A stable combustion state can be obtained by automatically controlling the blower to the target rotational speed corresponding to the fuel supplied by the control device, and when the front plate is opened, it is set by the rotational speed control device by the correction device. A stable combustion state can be obtained by automatically controlling the blower to the rotational speed obtained by subtracting the calculated value in the target rotational speed, and a stable combustion state can be automatically obtained regardless of the open / closed state of the front plate. Therefore, there is no restriction on the shape of the air supply port on the front plate and the mounting of the silencer, and the noise reduction of the combustion apparatus can be realized.
[0011]
In addition, the second function includes a rotation speed detection device, a rotation speed comparison circuit, a display device and a display circuit that can be distinguished from the outside of the casing, and displays an output signal of the detection device when the front plate is closed by the detection device. In addition to displaying on the device, the rotational speed detection device detects the rotational speed of the blower, compares the actual rotational speed with the target rotational speed by the rotational speed comparison circuit, and displays if the rotational speed is within a preset error range. By displaying on the device, it can be confirmed that the blower is rotating at the target rotation speed when the front plate is closed, so the rotation speed obtained by subtracting the calculated value in the target rotation speed is significantly higher than the target rotation speed. Even if the size is reduced, safety can be ensured, and there are no restrictions on the shape of the air supply port on the front plate and the mounting of the silencer, and the noise reduction of the combustion apparatus can be realized.
[0012]
The third effect is that the rotation speed comparison circuit has a timer, and when the front plate is closed by the detection device, if the rotation speed of the blower and the target rotation speed do not coincide with each other for a certain time or longer, the fuel is supplied to the burner section. By providing a safety device that stops the supply of air, when an abnormality occurs in the automatic control of the blower and the front plate is closed, the blower burns even if it rotates at a rotational speed that subtracts the calculated value at the target rotational speed Since damage to the device can be prevented, safety can be ensured even if the rotational speed obtained by subtracting the calculated value in the target rotational speed is significantly smaller than the target rotational speed, and the shape of the air supply port on the front plate and the silencer The restriction on the mounting of the combustion chamber is further eliminated, and the noise of the combustion apparatus can be reduced.
[0013]
【Example】
FIG. 1 is a schematic configuration diagram of a combustion apparatus according to a first embodiment of the present invention.
[0014]
In FIG. 1, a fuel is supplied to a burner 6, a water-heating heat exchanger 7, and a burner 6 into a casing 5 including a front plate 3 having an air inlet 1 and a silencer 2 and a main body case 4. A supply device 8, a blower 9 for supplying combustion air, a rotation speed control device 10 for controlling the rotation speed of the blower, and a detection device 11 for detecting opening and closing of the front plate are provided. The heat exchanger 7 is provided with a water amount detection device 12, an incoming water temperature detection device 13, and a hot water temperature detection device 14. The fuel supply device 8 includes a fuel supply amount setting circuit 15, an electromagnetic valve 16 that opens and closes the fuel passage, and a fuel control device 17 that controls the fuel supply amount. The rotation speed control device 10 includes a target rotation speed setting circuit 18, a blower drive circuit 19, and a correction circuit 20. The detection device 11 outputs an ON signal to the rotation speed control device 10 when the front plate 3 is attached to the main body case 4 by a switch or the like that detects opening and closing of the front plate, and the front plate 3 is removed from the main body case 4. When this is the case, an OFF signal is output to the rotation speed control device 10.
[0015]
FIG. 2 is an operation flowchart of the combustion apparatus of the first embodiment of the present invention.
The operation of the combustion apparatus according to the first embodiment of the present invention will be described below with reference to the operation flowchart of FIG.
[0016]
When the front plate 3 is attached to the main body case 4 and a water flow is generated due to the opening of the hot water currant or the like, the water amount detection device 12 detects the flow of water, and the water amount detected by the water amount detection device 12 and the incoming water temperature detection device 13 The fuel supply amount is calculated by the fuel supply amount setting circuit 15 so that a preset hot water temperature can be obtained from the detected incoming water temperature, the electromagnetic valve 16 is opened, and predetermined fuel is supplied from the fuel control device 17 to the burner 6. At the same time, the front plate 3 is attached to the main body case 4 in correspondence with the fuel supplied from the fuel control device 17 by the target speed setting circuit 18 when the rotational speed control device 10 detects the ON signal of the detection device 11. Then, a target rotational speed for supplying an appropriate amount of air that burns in a stable state when the fuel is stable is set, and the blower is controlled via the blower drive circuit 19 to rotate at the target rotational speed.
[0017]
On the other hand, when the front plate 3 is removed from the main body case 4 and a water flow is generated due to the opening of the tapping currant or the like, the rotation speed control device 10 detects the OFF signal of the detection device 11 and the correction circuit 20 detects the target. A corrected rotational speed obtained by subtracting a calculated value from the rotational speed is set, and the blower is controlled via the blower drive circuit 19 to rotate at the corrected rotational speed.
[0018]
Therefore, according to the combustion apparatus of the first embodiment of the present invention, the front plate can be controlled by automatically controlling the blower 9 at a rotational speed at which a stable combustion state can be obtained regardless of whether the front plate 3 is opened or closed. The shape of the air supply port 1 of 3 is greatly reduced, and the combustion device burns even when the amount of air supplied differs between when the front plate is opened and when it is closed using a large amount of the silencer 2 Since defects can be prevented, there are no restrictions on the shape of the air supply port of the front plate and the mounting of the sound deadening material, and noise reduction of the combustion apparatus can be realized.
[0019]
FIG. 3 shows a schematic configuration diagram of the combustion apparatus of the second embodiment of the present invention.
The difference from the combustion apparatus of the first embodiment is that a rotation speed detection circuit 21 and a display device 22 that can be identified from outside the casing are provided in a casing 5 consisting of a front plate 3 and a body case 4, and a rotation speed comparison circuit 23. And a display circuit 24. The display device 22 is an LED, a lamp, or the like.
[0020]
FIG. 4 is an operation flowchart of the combustion apparatus of the second embodiment of the present invention. Hereinafter, the operation of the combustion apparatus of the second embodiment of the present invention will be described with reference to the operation flowchart of FIG.
[0021]
When actual hot water supply is started by opening the hot water drain when the front plate 3 is attached to the main body case 4, the display circuit 24 receives an ON signal from the detection device 11 and turns on the LED, lamp, etc. of the display device 22. Light up. Further, the rotational speed control device 10 controls the blower 9 to rotate at the target rotational speed, the rotational speed detection device 21 detects the actual rotational speed of the blower 9, and the rotational speed comparison circuit 23 compares it with the target rotational speed. If the rotation is within a preset error range, the other LEDs and lamps of the display device 22 are turned on. Since the display device 22 is configured to be identified from the outside of the casing 5, it is possible to easily check whether the LED or lamp of the display device 22 is turned on or off. If both the display devices 22 are turned on, the combustion device is It can be confirmed that it is operating normally. Further, when the front plate 3 is attached to the main body case 4, the blower 9 is not actually rotated due to the detection device 11 not being able to detect the opening / closing of the front plate 3 or the failure of the rotational speed control device 10 or the blower 9. It is possible to easily confirm that the rotation is not performed by a number, and it is possible to prevent an abnormality of the combustion apparatus.
[0022]
FIG. 5 shows a schematic configuration diagram of a combustion apparatus according to a third embodiment of the present invention.
The difference from the combustion apparatus of the second embodiment is that the rotation speed comparison circuit 23 is provided with a timer and the burner 6 is provided with a safety device 25 for stopping the fuel supply.
[0023]
FIG. 6 is an operation flowchart of the combustion apparatus of the third embodiment of the present invention. The operation of the combustion apparatus according to the third embodiment of the present invention will be described below with reference to the operation flowchart of FIG.
[0024]
When the actual hot water supply is started by opening the hot water drain when the front plate 3 is attached to the main body case 4, the fan 9 is controlled by the rotation speed control device 10 in response to the ON signal of the detection device 11, and the target The rotation speed detection device 21 detects the actual rotation speed of the blower 9 and the rotation speed comparison circuit 23 compares the rotation speed with the target rotation speed. If not, the safety device 25 is actuated to close the solenoid valve 16 to close the fuel passage and stop the fuel supply to the burner 6. The safety of the combustion device can be improved by the second and third embodiments, so that the safety of the combustion device is ensured even if the rotational speed obtained by subtracting the calculated value in the target rotational speed is significantly smaller than the target rotational speed. This further eliminates the restrictions on the shape of the air supply port 1 of the front plate 3 and the mounting of the silencer 2, and the noise reduction of the combustion apparatus can be realized.
[0025]
【The invention's effect】
As described above, according to the combustion apparatus of the first claim of the present invention, the following effects can be obtained.
[0026]
(1) Even if a noise-reducing material is attached to the front plate or the opening area of the intake port is reduced to increase the intake resistance of the intake circuit of the combustion device to reduce noise, Since the blower is automatically controlled at a rotational speed at which a stable combustion state can be obtained, low noise of the combustion device can be easily achieved.
[0027]
(2) When the blower rotates at a rotational speed obtained by subtracting the calculated value at the target rotational speed when an abnormality occurs in the automatic control of the blower and the front plate is closed, damage to the combustion device can be prevented. Safety can be ensured even if the rotation speed obtained by subtracting the calculated value in the target rotation speed is significantly smaller than the target rotation speed, and there are no restrictions on the shape of the air supply port on the front plate or the mounting of the silencer. This makes it possible to reduce the noise by increasing the intake resistance of the intake circuit, and to reduce the noise of the combustion device.
[0028]
(3) Since a stable combustion state can be automatically obtained regardless of the open / closed state of the front plate, the TDR of the combustion device can be increased, so that a small amount of hot water can be discharged and the usability of the combustion device is improved. .
[0029]
The combustion apparatus according to the second aspect of the present invention provides the following effects.
(1) Since the display device can easily check the output signal of the detection device of the combustion device and whether the blower is actually rotating at the target rotational speed, the intake resistance of the intake circuit of the combustion device is increased to reduce noise. However, abnormality of the combustion device can be prevented, and low noise can be achieved without impairing the safety of the combustion device.
[0030]
The combustion apparatus according to the third aspect of the present invention provides the following effects.
(1) By providing a timer for a certain period of time to compare the rotation speed of the blower, the safety device malfunctions when there is a transient fluctuation in the rotation speed of the blower or an instantaneous fluctuation in the rotation speed due to disturbance such as wind Can be prevented.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a combustion apparatus in a first embodiment of the present invention. FIG. 2 is an operation flowchart of the combustion apparatus. FIG. 3 is a schematic configuration diagram of a combustion apparatus in a second embodiment of the present invention. 4] Operation flow chart of the combustion apparatus [FIG. 5] Schematic configuration diagram of the combustion apparatus in the third embodiment of the present invention [FIG. 6] Operation flow chart of the combustion apparatus [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Air inlet 2 Silencer 3 Front plate 4 Main body case 5 Casing 6 Burner 8 Fuel supply device 9 Blower 10 Rotation speed control device 11 Detection device 18 Target rotation speed setting circuit 19 Blower drive circuit 20 Correction circuit 21 Rotation speed detection device 22 Display device 23 Speed comparison circuit 24 Display circuit 25 Safety device

Claims (3)

給気口と消音材とを備えた前板と、本体ケースからなるケーシング内に設けられ燃料を燃焼するバーナ部と、前記バーナ部に燃料を供給する燃料制御装置と、前記バーナ部に空気を供給する送風機と、前記燃料制御装置で供給する燃料に対応した目標回転数に前記送風機を自動制御する回転数制御装置と、前記前板の開閉を検出する検出装置と、前記検出装置により前記前板が開放されている時には、前記目標回転数にある計算値を減算した回転数に前記送風機を自動制御する回転数補正装置とを設けた燃焼装置。A front plate provided with an air supply opening and a sound deadening material, a burner part provided in a casing made of a main body case, for burning fuel, a fuel control device for supplying fuel to the burner part, and air for the burner part A blower to be supplied, a rotational speed control device for automatically controlling the blower to a target rotational speed corresponding to the fuel supplied by the fuel control device, a detection device for detecting opening and closing of the front plate, and the detection device for the front A combustion apparatus provided with a rotation speed correction device that automatically controls the blower to a rotation speed obtained by subtracting a calculated value from the target rotation speed when the plate is opened. 回転数検出装置、回転数比較回路及びケーシング外から識別できる表示装置と、検出装置により前板が閉塞されている時には、前記検出装置の出力信号と前記回転数比較回路の回転数比較結果とを前記表示装置に表示させる表示回路とを設けた請求項1記載の燃焼装置。A rotation speed detection device, a rotation speed comparison circuit, a display device that can be identified from outside the casing, and when the front plate is closed by the detection device, an output signal of the detection device and a rotation speed comparison result of the rotation speed comparison circuit. The combustion apparatus according to claim 1, further comprising a display circuit for displaying on the display device. 回転数比較回路にタイマーを備え、検出装置により前板が閉塞されている場合において、一定時間以上送風機の回転数と目標回転数とが一致しない時にはバーナ部に燃料の供給を停止する安全装置を設けた請求項1記載の燃焼装置。When the rotation speed comparison circuit has a timer and the front plate is closed by the detection device, a safety device that stops the fuel supply to the burner unit when the rotation speed of the blower and the target rotation speed do not match for a certain time or more The combustion apparatus according to claim 1 provided.
JP03518595A 1995-02-23 1995-02-23 Combustion equipment Expired - Fee Related JP3674977B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP03518595A JP3674977B2 (en) 1995-02-23 1995-02-23 Combustion equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP03518595A JP3674977B2 (en) 1995-02-23 1995-02-23 Combustion equipment

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Publication Number Publication Date
JPH08226644A JPH08226644A (en) 1996-09-03
JP3674977B2 true JP3674977B2 (en) 2005-07-27

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Family Applications (1)

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