JPH0411764B2 - - Google Patents
Info
- Publication number
- JPH0411764B2 JPH0411764B2 JP14288185A JP14288185A JPH0411764B2 JP H0411764 B2 JPH0411764 B2 JP H0411764B2 JP 14288185 A JP14288185 A JP 14288185A JP 14288185 A JP14288185 A JP 14288185A JP H0411764 B2 JPH0411764 B2 JP H0411764B2
- Authority
- JP
- Japan
- Prior art keywords
- combustion
- detector
- oxygen deficiency
- burner
- fin clogging
- 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.)
- Expired
Links
- 238000002485 combustion reaction Methods 0.000 claims description 48
- 206010021143 Hypoxia Diseases 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 12
- 239000001301 oxygen Substances 0.000 description 12
- 229910052760 oxygen Inorganic materials 0.000 description 12
- 239000007789 gas Substances 0.000 description 9
- 230000007423 decrease Effects 0.000 description 4
- 239000000567 combustion gas Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Regulation And Control Of Combustion (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明はガス等の燃料を燃焼させ、水を加熱し
台所等に給湯する湯沸器に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a water heater that burns fuel such as gas to heat water and supply hot water to a kitchen or the like.
従来の技術
従来の技術としては、台所に給湯する小型湯沸
器を例として説明する。一般的な器具のため図は
省略する。小型湯沸器は室内で燃焼する器具であ
るため、長時間使用すると室内が酸欠となりバー
ナが不完全燃焼しCOが発生することがあつた。
そこで最近の小型湯沸器は、酸欠検知器を搭載し
不完全燃焼防止付となつてきた。しかしながら、
酸素濃度17％で燃焼を停止さすとしても、正常時
の燃焼性能と比較すると、17％での燃焼はかなり
悪くなつていた。逆に、酸欠余裕型として、17％
での燃焼を良くすると、燃焼室を非常に大きくす
る必要があり器具の寸法が大きくなつて台所での
インテリヤ性を甚だしく損つていた。また、フイ
ン詰りに関してもほぼ同様の問題があつた。Prior Art As a conventional technology, a small water heater for supplying hot water to a kitchen will be explained as an example. The diagram is omitted because it is a common device. Since small water heaters are appliances that burn indoors, if they were used for a long time, the room could become depleted of oxygen, causing the burner to burn incompletely and producing CO.
Therefore, recent small water heaters are equipped with oxygen deficiency detectors to prevent incomplete combustion. however,
Even if combustion was stopped at an oxygen concentration of 17%, combustion performance at 17% was considerably worse compared to normal combustion performance. On the other hand, as an oxygen deficiency-tolerant type, 17%
In order to improve combustion in the kitchen, the combustion chamber had to be made very large, which increased the size of the appliance and seriously spoiled the interior design of the kitchen. Also, almost the same problem occurred regarding fin clogging.
発明が解決しようとする問題点
そこで本発明は器具寸法を大きくしてインテリ
ヤ性を損うことなく、へかつ、酸欠となり酸素濃
度が低下しても、フイン詰りとなつても燃焼性能
が悪化しないようにすることを目的としている。Problems to be Solved by the Invention Therefore, the present invention has been developed to increase the size of the appliance without impairing the interior design, and the combustion performance deteriorates even if the oxygen concentration decreases due to lack of oxygen or the fins become clogged. The purpose is to prevent this from happening.
問題点を解決するための手段
本発明は上記問題点を解決するため、バーナと
燃焼室と、燃焼室を囲む熱交換器と、バーナに燃
焼用空気を供給する燃焼フアンと、酸欠検知器あ
るいはフイン詰り検知器と、燃焼を停止するため
の閉止弁と、燃焼フアンを制御する制御器とを有
し、制御器は酸欠検知器あるいはフイン詰り検知
器により酸欠あるいはフイン詰りの程度を検知
し、その程度に応じて燃焼フアンの風量を増加さ
せ、正常時の空気過剰率と同等の空気過剰率で燃
焼するように制御し、燃焼フアン能力の上限値に
達した時燃焼を停止するように制御するものであ
る。また場合によつては、フイン詰り検知器をも
有し、フイン詰り時においても正常時の空気過剰
率で燃焼するように制御するものである。Means for Solving the Problems In order to solve the above problems, the present invention provides a burner, a combustion chamber, a heat exchanger surrounding the combustion chamber, a combustion fan that supplies combustion air to the burner, and an oxygen deficiency detector. Alternatively, it has a fin clogging detector, a shutoff valve for stopping combustion, and a controller for controlling the combustion fan, and the controller detects the degree of oxygen deficiency or fin clogging using an oxygen deficiency detector or a fin clogging detector. Detects the situation, increases the air volume of the combustion fan according to the degree, controls combustion so that the excess air rate is the same as the normal excess air rate, and stops combustion when the upper limit of the combustion fan capacity is reached. It is controlled as follows. In some cases, a fin clogging detector is also provided to control combustion so that combustion is maintained at the normal excess air ratio even when the fins are clogged.
作 用
本発明は上記の構成により、燃焼フアンによつ
てバーナに強制的に空気を送り火炎長を短くする
ため、器具を小型にすることができる。また、酸
欠を検知するための酸欠検知器、あるいはフイン
詰りを検知するためのフイン詰り検知器により、
酸欠あるいはフイン詰りの程度を検知し、その程
度に応じて、燃焼フアンの風量を増加させ、正常
時の空気過剰率と同等の空気過剰率になるように
制御器により制御される。従つて、バーナの燃焼
性は悪化することなく一定に保たれる。また、燃
焼フアンの能力の上限値に達すれば燃焼を停止さ
せることも可能である。Effects According to the present invention, with the above-described configuration, the combustion fan forcibly sends air to the burner to shorten the flame length, so that the apparatus can be made compact. In addition, we have an oxygen deficiency detector to detect oxygen deficiency or a fin clogging detector to detect fin clogging.
The controller detects the degree of oxygen deficiency or fin clogging, increases the air volume of the combustion fan according to the degree, and controls the excess air ratio to be the same as the excess air ratio under normal conditions. Therefore, the combustibility of the burner is kept constant without deterioration. It is also possible to stop combustion when the upper limit of the combustion fan's capacity is reached.
実施例
第１図は本発明の小型湯沸器の一実施例を示す
正面図である。第１図において、１はバーナ、２
は燃焼室、３は熱交換器、４は給水管、５は流水
スイツチ、６は給湯管、７はガス管、８はガス
弁、９はフアンモータ、１０は燃焼フアン、１１
は酸欠検知器（本実施例は酸欠のみ示す）、１２
は制御器である。図示されていない蛇口を開く
と、給水管４より給水され、流水スイツチ５が開
き制御器１２に信号を伝え、ガス管７に配設され
たガス弁８を開くとともにフアンモータ９を駆動
させ燃焼フアン１０が始動する。時を同じくして
図示されていない点火器により点火され、バーナ
１は燃焼フアン１０により強制的に送られる燃焼
空気により、燃焼室２の内部でコンパクトな燃焼
を始める。燃焼ガスは熱交換器３により水と熱交
換された後、外部に排気され、加熱された水は湯
となり給湯管６より給湯される。酸欠検知器１１
は本実施例では熱電対とする。そして、室内空気
が燃焼ガスで汚染されて酸欠になると、今までバ
ーナ１の炎で加熱されて発生していた熱電対の熱
起電力は前記炎がとんで熱電対が加熱されにくく
なり、ほぼ直線的に低下し始める。この熱起電力
の低下はガス種が同一であれば、空気過剰率の低
下と対応づけられることは言うまでもない。酸欠
検知器１１の熱記電力は制御器１２に入力され、
空気過剰率が一定となるように、フアンモータ９
を制御する。Embodiment FIG. 1 is a front view showing an embodiment of a small water heater of the present invention. In Figure 1, 1 is a burner, 2
is a combustion chamber, 3 is a heat exchanger, 4 is a water supply pipe, 5 is a running water switch, 6 is a hot water supply pipe, 7 is a gas pipe, 8 is a gas valve, 9 is a fan motor, 10 is a combustion fan, 11
is an oxygen deficiency detector (this example shows only oxygen deficiency), 12
is the controller. When a faucet (not shown) is opened, water is supplied from the water supply pipe 4, the water flow switch 5 is opened, and a signal is transmitted to the controller 12, which opens the gas valve 8 disposed in the gas pipe 7 and drives the fan motor 9 to cause combustion. Fan 10 starts. At the same time, the burner 1 is ignited by an igniter (not shown), and the burner 1 starts compact combustion inside the combustion chamber 2 by the combustion air forcibly sent by the combustion fan 10. After the combustion gas exchanges heat with water in the heat exchanger 3, it is exhausted to the outside, and the heated water becomes hot water and is supplied from the hot water supply pipe 6. Oxygen deficiency detector 11
is a thermocouple in this embodiment. Then, when the indoor air is contaminated with combustion gas and becomes oxygen deficient, the thermoelectromotive force of the thermocouple that was previously generated by being heated by the flame of burner 1 is stopped by the flame, and the thermocouple becomes difficult to heat. It begins to decline almost linearly. Needless to say, this decrease in thermoelectromotive force can be associated with a decrease in excess air ratio if the gas species are the same. The thermal power of the oxygen deficiency detector 11 is input to the controller 12,
In order to keep the excess air ratio constant, the fan motor 9
control.
第２図に、酸素濃度に対する従来例と、本発明
によるCO／CO2特性と空気過剰率との関係を示
す。この図より明らかなように、従来例によれば
酸素濃度17.5％で空気過剰率ｍが1.1を下回り、
CO／CO2特性が急激に悪くなる。一方、本発明
の湯沸器であれば空気過剰率ｍがほぼ一定である
ため、CO／CO2特性は酸素濃度15％以下まで良
好である。従つて、酸素濃度18〜17％でガス弁８
を閉止すればCOが多量に発生する心配は全くな
い。 FIG. 2 shows the relationship between the conventional example with respect to oxygen concentration and the CO/CO 2 characteristics and excess air ratio according to the present invention. As is clear from this figure, according to the conventional example, when the oxygen concentration is 17.5%, the excess air ratio m is less than 1.1.
CO/CO 2 characteristics deteriorate rapidly. On the other hand, in the water heater of the present invention, since the excess air ratio m is almost constant, the CO/CO 2 characteristics are good up to an oxygen concentration of 15% or less. Therefore, at an oxygen concentration of 18-17%, gas valve 8
If it is closed, there is no need to worry about large amounts of CO being generated.
本実施例では酸欠検知器１１のみが取り付けら
れているが、フイン詰り検知器を併設して、酸欠
時もフイン詰り時にも、同様に空気過剰率が一定
になるように制御することにより、いずれの場合
にも燃焼性を悪化させることなく、酸欠やフイン
詰りを検知しガス弁を閉止することが可能とな
る。 In this embodiment, only the oxygen deficiency detector 11 is installed, but a fin clogging detector is also installed to control the excess air ratio to be constant both in the case of oxygen deficiency and in the case of fin clogging. In either case, it is possible to detect oxygen deficiency or fin clogging and close the gas valve without deteriorating combustibility.
なお、フイン詰りとは、突発的にタオル等が落
下しフイン部分を閉塞する場合、あるいは経年変
化により徐々にフインの間が燃焼生成物等で閉塞
されることである。どちらの場合も、空気過剰率
が低下する方向であり、燃焼室２の温度上昇、酸
素濃度低下が見られ、フイン詰り検知器として
は、温度を検知する熱電対、あるいは酸素濃度検
知器が用いられ、主として燃焼室２に設置される
ものである。 Note that fin clogging is when a towel or the like suddenly falls and blocks the fins, or when the space between the fins gradually becomes clogged with combustion products or the like due to aging. In both cases, the excess air ratio is decreasing, and the temperature in the combustion chamber 2 is rising and the oxygen concentration is decreasing, and a thermocouple that detects temperature or an oxygen concentration detector is used as a fin clogging detector. It is mainly installed in the combustion chamber 2.
発明の効果
以上述べてきたように、本発明によれば燃焼フ
アンにより火炎長を短くすることができるため、
器具が小型になり室内のインテリヤ性を損うこと
がない。Effects of the Invention As described above, according to the present invention, since the flame length can be shortened by the combustion fan,
The fixtures are small and do not spoil the interior design of the room.
また、酸欠検知器あるいはフイン詰り検知器に
より酸欠時あるいはフイン詰りであつても空気過
剰率が一定となるように制御するため燃焼性が悪
化しない。 Further, since the excess air ratio is controlled to be constant using an oxygen deficiency detector or a fin clogging detector even in the event of oxygen deficiency or fin clogging, combustibility does not deteriorate.
つぎに、長期使用によりフイン目詰りや一次空
気ダンパ詰りが起つても空気過剰率が一定になる
ように制御するため燃焼性が悪化しないばかりか
長期使用に耐えることが可能となる。 Next, even if the fins become clogged or the primary air damper becomes clogged due to long-term use, the excess air ratio is controlled to be constant, so combustibility does not deteriorate and it is possible to withstand long-term use.
さらに、万一、酸欠やフイン詰りの程度がひど
時にはガス弁により燃焼性が悪化する以前に余裕
をもつて燃焼を停止することできる。 Furthermore, in the unlikely event that oxygen deficiency or fin clogging is severe, the gas valve can be used to stop combustion with plenty of time before combustibility worsens.
第１図は本発明の一実施例である湯沸器を示す
正面図、第２図は酸素濃度に対する従来例と本発
明によるCO／CO2特性と空気過剰率との関係を
示す特性図である。
１…バーナ、２…燃焼室、３…熱交換器、１０
…燃焼フアン、１１…酸欠検知器、１２…制御
器。
Fig. 1 is a front view showing a water heater that is an embodiment of the present invention, and Fig. 2 is a characteristic diagram showing the relationship between CO/CO 2 characteristics and excess air ratio according to the conventional example and the present invention with respect to oxygen concentration. be. 1...burner, 2...combustion chamber, 3...heat exchanger, 10
... Combustion fan, 11... Oxygen deficiency detector, 12... Controller.
Claims (1)
と、バーナに燃焼用空気を供給する燃焼フアン
と、酸欠検知器あるいはフイン詰り検知器と、燃
焼を停止するための閉止弁と、燃焼フアンを制御
する制御器とを有し、制御器は酸欠検知器あるい
はフイン詰り検知器により、酸欠あるいはフイン
詰りの程度を検知し、その程度に応じて燃焼フア
ンの風量を増加させ、正常時の空気過剰率と同等
の空気過剰率で燃焼するように制御し、燃焼フア
ン能力の上限値に達した時燃焼を停止するように
制御する湯沸器。1 A burner and a combustion chamber, a heat exchanger surrounding the combustion chamber, a combustion fan that supplies combustion air to the burner, an oxygen deficiency detector or a fin clogging detector, a shutoff valve for stopping combustion, and a combustion fan that supplies combustion air to the burner. The controller has an oxygen deficiency detector or a fin clogging detector to detect the degree of oxygen deficiency or fin clogging, and increases the air volume of the combustion fan according to the degree, so as to maintain normal operation. A water heater that controls combustion so that it burns at the same excess air rate as the air excess rate at that time, and stops combustion when the upper limit of the combustion fan capacity is reached.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60142881A JPS625016A (en) | 1985-06-28 | 1985-06-28 | water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60142881A JPS625016A (en) | 1985-06-28 | 1985-06-28 | water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS625016A JPS625016A (en) | 1987-01-12 |
| JPH0411764B2 true JPH0411764B2 (en) | 1992-03-02 |
Family
ID=15325764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60142881A Granted JPS625016A (en) | 1985-06-28 | 1985-06-28 | water heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS625016A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004011937A (en) * | 2002-06-03 | 2004-01-15 | Rinnai Corp | Combustion apparatus |
-
1985
- 1985-06-28 JP JP60142881A patent/JPS625016A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004011937A (en) * | 2002-06-03 | 2004-01-15 | Rinnai Corp | Combustion apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS625016A (en) | 1987-01-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |