JP2001065978A - Water heater - Google Patents
Water heaterInfo
- Publication number
- JP2001065978A JP2001065978A JP23600099A JP23600099A JP2001065978A JP 2001065978 A JP2001065978 A JP 2001065978A JP 23600099 A JP23600099 A JP 23600099A JP 23600099 A JP23600099 A JP 23600099A JP 2001065978 A JP2001065978 A JP 2001065978A
- Authority
- JP
- Japan
- Prior art keywords
- combustion
- amount
- stage
- switching
- proportional valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 238000002485 combustion reaction Methods 0.000 claims abstract description 99
- 239000000446 fuel Substances 0.000 claims description 2
- 238000010079 rubber tapping Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Landscapes
- Regulation And Control Of Combustion (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、複数本のバーナか
らなるバーナユニットを複数備え、要求される燃焼量に
応じて各バーナユニットの燃焼状態を個別に制御し、燃
焼能力を多段の燃焼段階で切り替え可能とした給湯器に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a plurality of burner units each comprising a plurality of burners, individually controlling the combustion state of each burner unit in accordance with a required amount of combustion, and increasing the combustion capacity in multiple combustion stages. Water heaters that can be switched by
【０００２】[0002]
【従来の技術】給湯器には、要求される燃焼量に応じて
ガス供給量を制御する比例弁を備えると共に、複数本の
バーナからなるバーナユニット（以下「ユニット」とい
う）が設けられ、比例弁によるガス供給量に応じて各ユ
ニットへの分岐管に設けられた切替電磁弁を選択して開
閉することで、各ユニットの燃焼状態を個別に切り替
え、燃焼するバーナの本数を段階的に変更可能となって
いる。又、各燃焼段階の切り替え時には、新たに燃焼す
るユニットが爆発着火することがないように、比例弁の
ガス供給量制御により、一旦ガスインプットを４０％程
度にした火移り用の緩点火燃焼量で燃焼させ、その後要
求される燃焼量に移行する動作が通常行われている。2. Description of the Related Art A water heater is provided with a proportional valve for controlling a gas supply amount in accordance with a required combustion amount, and a burner unit (hereinafter, referred to as "unit") comprising a plurality of burners. By selecting and opening and closing the switching solenoid valve provided on the branch pipe to each unit according to the amount of gas supplied by the valve, the combustion state of each unit is individually switched, and the number of burners to be burned is changed stepwise It is possible. At the time of switching between the combustion stages, the gas supply amount of the proportional valve is controlled by the gas supply amount control of the proportional valve to temporarily reduce the gas input to about 40% so that the newly burning unit does not explode and ignite. Then, the operation of shifting to the required combustion amount is usually performed.
【０００３】[0003]
【発明が解決しようとする課題】このように、燃焼段階
の切り替え時に常に上記緩点火燃焼量による制御が実行
されると、特に能力大側への切り替えの際に使い勝手を
損ねる。例えば、図４の左側のグラフは、流量の増加等
により燃焼段階が三段から四段の最大燃焼量へ切り替わ
る場合に緩点火制御を行った場合の流量、比例弁電流、
出湯温度の変化を夫々示すものであるが、ここで明らか
なように、切り替えの際に緩点火制御を行うと、その間
燃焼量が低く抑えられることで、出湯温度のアンダーシ
ュートが大きくなってしまうのである。As described above, if the control based on the moderately ignited combustion amount is always performed at the time of switching the combustion stage, the usability is impaired, especially when switching to the higher capacity side. For example, the graph on the left side of FIG. 4 shows the flow rate, the proportional valve current, and the proportional valve current when the slow ignition control is performed when the combustion stage is switched from the third stage to the fourth stage maximum combustion amount due to an increase in the flow amount or the like.
Although the change of the tapping temperature is shown respectively, as is clear here, if the slow ignition control is performed at the time of switching, the combustion amount is suppressed low during that time, so that the undershoot of the tapping temperature increases. It is.
【０００４】そこで、請求項１に記載の発明は、燃焼段
階の切り替え時の出湯温度のアンダーシュートを効果的
に低減して使い勝手に優れた給湯器を提供することを目
的としたものである。Accordingly, an object of the present invention is to provide a water heater excellent in usability by effectively reducing the undershoot of the tapping temperature at the time of switching the combustion stage.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、請求項１に記載の発明は、能力が小さくなる側への
燃焼段階の切り替え時には、比例弁の制御により、一旦
予め設定された火移り用の緩点火燃焼量で切り替え後の
バーナユニットを燃焼させて火移りを行わせ、能力が大
きくなる側への燃焼段階の切り替え時には、比例弁の制
御により、一旦緩点火燃焼量を超える燃焼量で切り替え
後のバーナユニットを燃焼させて火移りを行わせるよう
にしたことを特徴とするものである。請求項２に記載の
発明は、請求項１の目的に加えて、アンダーシュートの
低減をより有効に実現するために、緩点火燃焼量を超え
る燃焼量を、切り替え後の燃焼段階での最大燃焼量とし
たものである。請求項３に記載の発明は、請求項１又は
２の目的に加えて、比例弁によるガス供給量に応じた回
転数で駆動して燃焼用空気を供給するファンを備えたも
のでは、能力大側、小側への切り替えにかかわらず火移
りを確実に行わせるために、燃焼段階の切り替え時に
は、一時的にガス供給量に応じた回転数より小さい回転
数でファンを制御する構成としたものである。In order to achieve the above object, according to the first aspect of the present invention, when the combustion stage is switched to a side where the capacity is reduced, the ratio is set in advance by controlling a proportional valve. The burner unit after switching with the moderately ignited combustion amount for fire transfer is burned to perform the ignition, and at the time of switching the combustion stage to the side where the capacity becomes larger, the proportional valve control temporarily exceeds the moderately ignited combustion amount. The present invention is characterized in that the burner unit after switching is burned by the combustion amount to perform a fire. In addition to the object of the first aspect, the invention according to the second aspect provides the maximum combustion in the combustion stage after switching the combustion amount exceeding the moderately ignited combustion amount in order to more effectively reduce the undershoot. It is a quantity. According to the third aspect of the present invention, in addition to the object of the first or second aspect, a fan provided with a fan for supplying combustion air by driving at a rotation speed corresponding to a gas supply amount by a proportional valve has a large capacity. In order to surely perform a fire transfer regardless of switching to the side or small side, when switching the combustion stage, the fan is temporarily controlled at a rotation speed smaller than the rotation speed according to the gas supply amount It is.
【０００６】[0006]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて説明する。図１は給湯器１の概略を示すもの
で、燃焼室２内には、熱交換器３を加熱する６本のバー
ナからなるバーナユニット（以下「ユニット」という）
４と、４本のバーナからなるユニット５と、７本のバー
ナからなるユニット６とを備え、各ユニット４〜６に
は、ガス管７から各ユニット４〜６へ分岐する分岐管
８，８・・が接続されている。又、各分岐管８には切替
電磁弁９が、分岐前のガス管７には比例弁１０と元電磁
弁１１とが夫々設けられている。一方、熱交換器３に通
じる給水管１２には、水量センサ１４、入水温センサ１
５、水絞りモータ１６が、出湯管１３には出湯温センサ
１７，１８が夫々設けられ、燃焼室２の下方には、燃焼
用空気を供給するファン１９とファンモータ２０とが備
えられている。２１，２１・・は各ユニット４〜６に設
けられた炎検出用のフレームロッド、２２は点火電極で
ある。そして、２３はコントローラで、コントローラ２
３は、各センサにより検出された水量、入水温度、出湯
温度から設定温度の出湯に必要な燃焼量を演算し、その
演算結果に基づいて各ユニット４〜６ごとの切替電磁弁
９の開閉と比例弁１０の開度調整とを行うことで、各ユ
ニット４〜６の燃焼の切り替えによる多段階の燃焼制御
を実行すると共に、ファン１９の回転数を制御する。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 schematically shows a water heater 1 in which a burner unit (hereinafter referred to as “unit”) including six burners for heating a heat exchanger 3 is provided in a combustion chamber 2.
4, a unit 5 composed of four burners, and a unit 6 composed of seven burners. Each of the units 4 to 6 has a branch pipe 8, 8 that branches from the gas pipe 7 to each of the units 4 to 6.・ ・ Is connected. Each branch pipe 8 is provided with a switching solenoid valve 9, and the gas pipe 7 before branching is provided with a proportional valve 10 and an original solenoid valve 11. On the other hand, a water supply sensor 12 and an incoming water temperature sensor 1
5, a water throttle motor 16, a tapping water temperature sensor 17, 18 is provided in the tapping pipe 13, respectively, and a fan 19 and a fan motor 20 for supplying combustion air are provided below the combustion chamber 2. . .. Are flame rods for flame detection provided in each of the units 4 to 6, and 22 is an ignition electrode. Reference numeral 23 denotes a controller.
3 calculates the amount of combustion required for tapping at a set temperature from the amount of water detected by each sensor, the input water temperature, and the tap water temperature, and based on the calculation result, opens and closes the switching solenoid valves 9 for each of the units 4 to 6. By performing the opening adjustment of the proportional valve 10, multi-stage combustion control is performed by switching the combustion of each of the units 4 to 6, and the rotation speed of the fan 19 is controlled.
【０００７】又、ユニット４〜６の切り替えによる燃焼
段階は、各段階ごとに予めコントローラ２３に記憶され
ている。具体的には、３つの切替電磁弁９のＯＮを
「１」、ＯＦＦを「０」として、各段階ごとに「０１
０」「０１１」等のようにデータを保存し、各データに
基づいて各燃焼段階の各切替電磁弁９の動作が制御され
る。ここでは、一段では中央のユニット５のみが燃焼し
（０１０）、二段では右のユニット６のみが燃焼し（０
０１）、三段ではユニット５，６が燃焼し（０１１）、
四段では全ユニット４〜６が燃焼する（１１１）。よっ
て、一段では４本、二段では７本、三段では１１本、四
段では１７本のバーナによる燃焼が得られることにな
る。The combustion stages by switching the units 4 to 6 are stored in the controller 23 in advance for each stage. Specifically, the ON state of the three switching solenoid valves 9 is set to “1” and the OFF state is set to “0”, and “01” is set for each stage.
Data such as “0” and “011” is stored, and the operation of each switching solenoid valve 9 in each combustion stage is controlled based on each data. Here, in the first stage, only the center unit 5 burns (010), and in the second stage, only the right unit 6 burns (0).
01), in the third stage, units 5 and 6 burn (011),
In the fourth stage, all the units 4 to 6 burn (111). Thus, four burners can be used in one stage, seven can be used in two stages, 11 can be used in three stages, and 17 burners can be obtained in four stages.
【０００８】更に、コントローラ２３は、各燃焼段階の
切り替え時に、図２のフローチャートで示す火移り制御
を実行している。以下、この火移り制御について説明す
る。Ｓ１の判別で出湯確認後、Ｓ２では、要求されるイ
ンプット量Ｉｐが能力大側への燃焼段階の切り替えが必
要なインプット量Ｉｐ′以上か否かを判別する。ここで
能力大側への切り替えが必要であれば、次のＳ３で、能
力大側への燃焼段階へ切り替えると共に、比例弁１０の
開度調整により一旦当該燃焼段階での最大燃焼量で燃焼
させて火移りを行わせ、Ｓ５で要求されるインプット量
Ｉｐでの燃焼を行う。尚、要求されるインプット量Ｉｐ
が最大燃焼量未満の場合は、火移りの際に過大なインプ
ットを与えることになるが、火移りに係る時間は短時間
のため、逆にオーバーシュートになることはない。一
方、Ｓ２の判別で、インプット量Ｉｐが能力大側への燃
焼段階の切り替えが必要なインプット量Ｉｐ′でなけれ
ば、Ｓ４で、当該燃焼段階へ切り替えると共に、比例弁
１０は、一旦予め設定された４０％程度の比例弁電流
（緩点火電流）で開度調整され、このインプットによる
緩点火燃焼量で火移りを行わせた後、Ｓ５で要求される
インプット量Ｉｐでの燃焼を行う。このＳ２からＳ５ま
での制御は、Ｓ６の判別で出湯停止が確認されるまで実
行される。[0008] Further, the controller 23 executes the fire control shown in the flow chart of FIG. 2 at the time of switching each combustion stage. Hereinafter, the fire control will be described. After checking the hot water in the determination of S1, in S2, it is determined whether or not the required input amount Ip is equal to or greater than the input amount Ip 'which requires switching of the combustion stage to the higher capacity side. Here, if it is necessary to switch to the higher capacity side, in the next S3, the combustion step is switched to the higher capacity side combustion step, and the combustion is once performed at the maximum combustion amount in the combustion step by adjusting the opening of the proportional valve 10. Then, the combustion is performed with the input amount Ip required in S5. The required input amount Ip
If is less than the maximum combustion amount, an excessive input will be given at the time of a fire, but since the time related to the fire is short, no overshoot occurs. On the other hand, if it is determined in S2 that the input amount Ip is not the input amount Ip 'which requires switching of the combustion stage to the higher capacity side, the combustion stage is switched in S4 and the proportional valve 10 is once set in advance. The opening is adjusted with the proportional valve current (slow ignition current) of about 40%, and the ignition is performed with the slow ignition combustion amount by this input, and then the combustion is performed with the input amount Ip required in S5. The control from S2 to S5 is executed until the stop of hot water is confirmed in the determination of S6.
【０００９】そして、図３は、各燃焼段階におけるガス
インプットとファン回転数との関係を示すグラフである
が、コントローラ２３は、上記火移り制御における能力
小側への切り替え時のファン１９の回転数を、緩点火電
流に対応する回転数Ｎ１ でなく、火移りが確実に行わ
れるように一時的に空気量を抑えた火移り用回転数Ｎ ２
で制御している。これは、能力大側への燃焼段階の切
り替え時も同様で、確実な火移りを考慮して、一時的に
最大回転数Ｎmax よりΔＮ（Ｎ１ −Ｎ２ ）小さい回転
数Ｎmax ′、即ちＮmax −（Ｎ１ −Ｎ２ ）で制御して
いる。この回転数Ｎmax ′は、緩点火制御時のインプッ
ト、ファン回転数の設定値Ｎ１ ，Ｎ２が予め与えられ
ているため、容易に求めることができる。FIG. 3 shows the gas in each combustion stage.
It is a graph which shows the relationship between an input and a fan rotation speed.
However, the controller 23 has the capability in the above-mentioned fire control.
The number of rotations of the fan 19 at the time of switching to the small side is
Rotational speed N corresponding to flow1 Not fire transfer
The number of rotations for fire N which temporarily reduced the air volume so that 2
Is controlled by This means that the combustion stage is switched to the higher capacity side.
The same is true when replacing
ΔN (N1 -N2 ) Small rotation
The number Nmax ', that is, Nmax- (N1 -N2 ) Control
I have. This rotational speed Nmax 'is the input during slow ignition control.
G, set value of fan speed N1 , N2Is given in advance
Therefore, it can be easily obtained.
【００１０】このように上記形態によれば、能力が大側
となる燃焼段階の切り替えを行う場合は、緩点火燃焼量
によらず、それを超える燃焼量で燃焼させるようにした
ことで、出湯温度のアンダーシュートを効果的に低減し
て使い勝手を向上させることができる。特にここでは最
大燃焼量としているから、アンダーシュートの低減効果
は最大となる。図４は、流量増加により三段から四段へ
切り替わる場合の流量と比例弁電流、出湯温度の変化を
夫々示すグラフで、左側が従来の緩点火制御によるも
の、右側が上記火移り制御によるものである。ここで明
らかなように、緩点火制御で火移りを行った場合と比較
して、最大燃焼量で火移りを行う方が出湯温度のアンダ
ーシュートが顕著に抑えられる。具体的には、設定温度
４２℃、入水温度１０℃で、水圧を０．８kg／cm２ か
ら３．２kg／cm２ へ変化させた三段から四段への切り
替えの場合、緩点火制御によるインプット５０％ではア
ンダーシュートは１１．８deg であるのが、インプット
１００％ではアンダーシュートは８．７deg となり、ア
ンダーシュートは３．１deg の低減が可能となってい
る。As described above, according to the above-described embodiment, when switching the combustion stage in which the capacity becomes large, the fuel is burned at a combustion amount exceeding the mild ignition combustion amount regardless of the mild ignition combustion amount. It is possible to effectively reduce the temperature undershoot and improve the usability. In particular, since the maximum combustion amount is set here, the effect of reducing the undershoot is maximized. FIG. 4 is a graph showing changes in flow rate, proportional valve current, and tapping temperature when switching from the third stage to the fourth stage due to an increase in the flow amount. The left side is based on the conventional slow ignition control, and the right side is based on the above-mentioned fire transfer control. It is. As is apparent here, the undershoot of the tapping temperature is significantly suppressed when the fire is started with the maximum combustion amount as compared with the case where the fire is started with the mild ignition control. Specifically, the set temperature 42 ° C., at a water inlet temperature of 10 ° C., if a three-stage of changing the water pressure from 0.8 kg / cm 2 to 3.2 kg / cm 2 for switching to four stages, by slow ignition control At 50% input, the undershoot is 11.8 deg, but at 100% input, the undershoot is 8.7 deg, and the undershoot can be reduced by 3.1 deg.
【００１１】尚、上記火移り制御では、能力大側への燃
焼段階の切り替え時には常に最大燃焼量で燃焼させるよ
うにしているが、必ずしも最大燃焼量とする必要はな
く、爆発着火を考慮して最大燃焼量未満で火移りを行っ
ても、緩点火燃焼量を超える燃焼量であれば、アンダー
シュートの低減効果は得ることができる。In the above-mentioned fire transfer control, the combustion is always performed at the maximum combustion amount when the combustion stage is switched to the higher capacity side. However, it is not always necessary to set the combustion amount to the maximum combustion amount. Even if a fire is performed at less than the maximum combustion amount, an undershoot reduction effect can be obtained as long as the combustion amount exceeds the mild ignition combustion amount.
【００１２】[0012]
【発明の効果】請求項１に記載の発明によれば、能力が
小さくなる側への燃焼段階の切り替え時には、比例弁の
制御により、一旦予め設定された火移り用の緩点火燃焼
量で切り替え後のバーナユニットを燃焼させて火移りを
行わせ、能力が大きくなる側への燃焼段階の切り替え時
には、比例弁の制御により、一旦緩点火燃焼量を超える
燃焼量で切り替え後のバーナユニットを燃焼させて火移
りを行わせるようにしたことで、燃焼段階の切り替え時
の出湯温度のアンダーシュートを低減し、使い勝手を向
上させることができる。請求項２に記載の発明によれ
ば、請求項１の効果に加えて、緩点火燃焼量を超える燃
焼量を、切り替え後の燃焼段階での最大燃焼量としたこ
とで、アンダーシュートの低減をより有効に実現可能と
なる。請求項３に記載の発明によれば、請求項１又は２
の効果に加えて、比例弁によるガス供給量に応じた回転
数で駆動して燃焼用空気を供給するファンを備えたもの
では、燃焼段階の切り替え時には、一時的にガス供給量
に応じた回転数より小さい回転数でファンを制御するも
のとしたことで、燃焼能力大側、小側への切り替えにか
かわらず、燃焼段階の切り替え時に空気量を抑えて火移
りを確実に行わせることができる。According to the first aspect of the present invention, when the combustion stage is switched to the side where the capacity is reduced, the ratio is switched by a preset moderately ignited combustion amount for a fire transfer by controlling a proportional valve. At the time of switching the combustion stage to the side where the capacity is increased by burning the burner unit after that, when switching the combustion stage to the side where the capacity increases, the burner unit after switching is once burned with the combustion amount exceeding the mild ignition combustion amount by controlling the proportional valve By performing the fire transfer, it is possible to reduce the undershoot of the tapping temperature at the time of switching the combustion stage and improve the usability. According to the second aspect of the invention, in addition to the effect of the first aspect, by reducing the amount of combustion exceeding the moderately ignited combustion amount to the maximum combustion amount in the combustion stage after the switching, the undershoot can be reduced. It can be realized more effectively. According to the invention described in claim 3, claim 1 or 2
In addition to the above-mentioned effects, the fan equipped with a fan that drives at the number of rotations corresponding to the gas supply amount by the proportional valve and supplies the air for combustion temporarily turns the rotation according to the gas supply amount when switching the combustion stage. By controlling the fan at a smaller number of revolutions, it is possible to suppress the amount of air at the time of switching the combustion stage and reliably perform the fire transfer, regardless of switching to the larger or smaller combustion capacity. .
【図面の簡単な説明】[Brief description of the drawings]
【図１】給湯器の概略図である。FIG. 1 is a schematic diagram of a water heater.
【図２】火移り制御のフローチャートである。FIG. 2 is a flowchart of a fire control.
【図３】ファン回転数とガスインプットとの関係を示す
グラフである。FIG. 3 is a graph showing a relationship between a fan speed and a gas input.
【図４】緩点火制御及び火移り制御における流量、比例
弁電流、出湯温度の変化を夫々示すグラフである。FIG. 4 is a graph showing changes in a flow rate, a proportional valve current, and a tapping temperature in mild ignition control and fire transfer control, respectively.
１・・給湯器、２・・燃焼室、３・・熱交換器、４，
５，６・・バーナユニット、７・・ガス管、９・・切替
電磁弁、１０・・比例弁、１９・・ファン、２３・・コ
ントローラ。1. hot water heater, 2. combustion chamber, 3. heat exchanger, 4,
5, 6 burner unit, 7 gas pipe, 9 switching solenoid valve, 10 proportional valve, 19 fan, 23 controller.
フロントページの続き Ｆターム(参考） 3K003 AA01 AB02 AB06 AC03 AC04 CA02 CA05 CB03 CB05 CC02 DA03 EA02 FA01 FB02 FB04 FC04 GA03 Continued on the front page F term (reference) 3K003 AA01 AB02 AB06 AC03 AC04 CA02 CA05 CB03 CB05 CC02 DA03 EA02 FA01 FB02 FB04 FC04 GA03
Claims (3)
制御する比例弁を備えると共に、複数本のバーナからな
るバーナユニットを複数設け、前記ガス供給量に応じて
前記各バーナユニットの燃焼状態を個別に制御し、燃焼
能力を多段の燃焼段階で切り替え可能とした給湯器であ
って、 能力が小さくなる側への前記燃焼段階の切り替え時に
は、前記比例弁の制御により、一旦予め設定された火移
り用の緩点火燃焼量で切り替え後の前記バーナユニット
を燃焼させて火移りを行わせ、能力が大きくなる側への
前記燃焼段階の切り替え時には、前記比例弁の制御によ
り、一旦前記緩点火燃焼量を超える燃焼量で切り替え後
の前記バーナユニットを燃焼させて火移りを行わせるよ
うにしたことを特徴とする給湯器。1. A fuel supply system comprising: a proportional valve for controlling a gas supply amount according to a required combustion amount; a plurality of burner units including a plurality of burners; and a combustion unit for each of the burner units according to the gas supply amount. A water heater in which the state is individually controlled and the combustion capacity can be switched between multiple combustion stages, and when the combustion stage is switched to a side where the capacity is reduced, the combustion capacity is once set in advance by controlling the proportional valve. The burner unit after the switching is burned with the moderately ignited combustion amount for the fire transfer to perform the fire transfer, and at the time of switching the combustion stage to the side where the capacity is increased, the proportional valve is controlled to temporarily stop the combustion. A water heater characterized in that the burner unit after switching is burned with a combustion amount exceeding an ignition combustion amount to perform a fire transfer.
え後の燃焼段階での最大燃焼量とした請求項１に記載の
給湯器。2. The water heater according to claim 1, wherein a combustion amount exceeding the moderate ignition combustion amount is set as a maximum combustion amount in a combustion stage after switching.
で駆動して燃焼用空気を供給するファンを備えたもので
は、燃焼段階の切り替え時には、一時的に前記ガス供給
量に応じた回転数より小さい回転数で前記ファンを制御
するものとした請求項１又は２に記載の給湯器。And a fan for supplying combustion air by driving at a rotation speed corresponding to the gas supply amount by the proportional valve. When the combustion stage is switched, the rotation according to the gas supply amount is temporarily stopped. The water heater according to claim 1 or 2, wherein the fan is controlled at a rotation speed smaller than the number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23600099A JP2001065978A (en) | 1999-08-23 | 1999-08-23 | Water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23600099A JP2001065978A (en) | 1999-08-23 | 1999-08-23 | Water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001065978A true JP2001065978A (en) | 2001-03-16 |
Family
ID=16994326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23600099A Pending JP2001065978A (en) | 1999-08-23 | 1999-08-23 | Water heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001065978A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003065607A (en) * | 2001-08-22 | 2003-03-05 | Harman Kikaku:Kk | Hot water feeding device |
-
1999
- 1999-08-23 JP JP23600099A patent/JP2001065978A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003065607A (en) * | 2001-08-22 | 2003-03-05 | Harman Kikaku:Kk | Hot water feeding device |
| JP4713784B2 (en) * | 2001-08-22 | 2011-06-29 | 株式会社ハーマンプロ | Water heater |
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