JP3021811B2 - Incomplete combustion prevention device - Google Patents
Incomplete combustion prevention deviceInfo
- Publication number
- JP3021811B2 JP3021811B2 JP3201352A JP20135291A JP3021811B2 JP 3021811 B2 JP3021811 B2 JP 3021811B2 JP 3201352 A JP3201352 A JP 3201352A JP 20135291 A JP20135291 A JP 20135291A JP 3021811 B2 JP3021811 B2 JP 3021811B2
- Authority
- JP
- Japan
- Prior art keywords
- concentration
- gas
- alarm
- combustion
- incomplete combustion
- 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 - Fee Related
Links
Landscapes
- Control Of Combustion (AREA)
- Feeding And Controlling Fuel (AREA)
- Regulation And Control Of Combustion (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、COセンサによる一酸
化炭素(CO)濃度検出に基づいてガス燃焼機器の燃焼
を停止させる不完全燃焼防止装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing incomplete combustion of a gas-fired device based on the detection of carbon monoxide (CO) concentration by a CO sensor.
【0002】[0002]
【従来の技術】従来から、一酸化炭素中毒の原因となる
ガス燃焼機器の不完全燃焼を防止するために、COセン
サをガスバーナの下流の排気筒に設け、COセンサの検
出信号に応じてガス燃焼を停止させる安全装置が知られ
ている。例えば、特開平2−150618号に提案され
たガス燃焼器の安全装置がある。この装置は、予め設定
した停止濃度と、この停止濃度よりも低い警報濃度とに
基づいて、COセンサにより検出したCO濃度が警報濃
度以上になったときにランプ点滅等により警報を発し、
その後停止濃度以上のCO濃度が検出されたときにガス
バーナへのガス供給を停止するものである。2. Description of the Related Art Conventionally, in order to prevent incomplete combustion of gas combustion equipment which causes carbon monoxide poisoning, a CO sensor is provided in an exhaust pipe downstream of a gas burner, and a gas sensor is provided in accordance with a detection signal of the CO sensor. Safety devices for stopping combustion are known. For example, there is a safety device for a gas combustor proposed in JP-A-2-150618. This device issues an alarm by blinking a lamp or the like when the CO concentration detected by the CO sensor becomes equal to or higher than the alarm concentration based on a preset stop concentration and an alarm concentration lower than the stop concentration,
Thereafter, when the CO concentration equal to or higher than the stop concentration is detected, the gas supply to the gas burner is stopped.
【0003】一般に、一酸化炭素中毒の発生メカニズム
として、排気再循環によるものがある。排気再循環で
は、ガス燃焼機器からの排気が燃焼機器自身の設置され
た室内に洩れることにより、室内酸素濃度が低下し、不
完全燃焼を起こして多量のCOを発生する。また、排気
が燃焼機器の設置室から完全に外へ放出される場合にお
いても、経時変化により燃焼機器の熱交換器や排気筒に
燃焼生成物が付着して低レベルのCOを発生することが
ある。そこで上述した従来の装置では、停止濃度と警報
濃度とを設定して、排気再循環による事故防止を行なう
だけでなく、警報により燃焼生成物の除去の時期を使用
者に報知することができ、安全性,使用性の高いもので
あった。[0003] In general, as a mechanism of generating carbon monoxide poisoning, there is a mechanism by exhaust gas recirculation. In exhaust gas recirculation, exhaust gas from a gas combustion device leaks into a room where the combustion device itself is installed, thereby lowering the oxygen concentration in the room and causing incomplete combustion to generate a large amount of CO. In addition, even when exhaust gas is completely discharged from the combustion equipment installation room, low-level CO can be generated due to the aging and combustion products adhering to the heat exchanger and exhaust stack of the combustion equipment. is there. Therefore, in the above-described conventional apparatus, it is possible to set a stop concentration and an alarm concentration, not only to prevent an accident due to exhaust gas recirculation, but also to notify a user of a time of removal of combustion products by an alarm, The safety and usability were high.
【0004】[0004]
【発明が解決しようとする課題】しかしながら、図5に
示すように、排気筒Pの接続不良等により排気が他室R
に洩れている場合には、COセンサSにより検出したC
O濃度が低レベルであっても、長時間燃焼を継続して排
気を放出した場合には、他室RのCO濃度が高くなって
しまう。低レベルのCO濃度を検出した警報に基づいて
使用者が機器を停止すれば問題はないものの、警報を無
視して使用し続けると高いCO濃度となってしまう。本
発明は上記課題を解決し、排気設備の不良等による他室
へのCO流出に対しても高い安全性能を有する不完全燃
焼防止装置を提供すること目的とする。However, as shown in FIG. 5, due to a poor connection of the exhaust pipe P or the like, the exhaust gas is exhausted from the other chamber R.
Is leaked to the sensor C detected by the CO sensor S
Even when the O concentration is at a low level, if the combustion is continued for a long time and the exhaust gas is discharged, the CO concentration in the other room R will increase. Although there is no problem if the user stops the device based on the alarm detecting the low level of the CO concentration, a high CO concentration will result if the user continues to use the alarm ignoring the alarm. An object of the present invention is to solve the above-mentioned problems and to provide an incomplete combustion prevention device having high safety performance against CO outflow to another room due to a defect in exhaust equipment or the like.
【0005】[0005]
【課題を解決するための手段】上記課題を解決するため
本発明の不完全燃焼防止装置は、図1に例示するよう
に、ガスバーナの排気通路に設けられ排気中のCO濃度
を検出するCOセンサM1と、上記ガスバーナへのガス
供給流路の開閉を行なう開閉手段M2と、上記検出され
たCO濃度と予め設定した第1基準濃度とを比較し、そ
のCO濃度が該第1基準濃度を超えた場合に警報を出す
警報手段M3と、上記検出されたCO濃度と上記第1基
準濃度より高い第2基準濃度とを比較し、そのCO濃度
が該第2基準濃度を超えた場合に上記開閉手段M2によ
り上記ガスバーナへのガス供給を停止させる第1停止手
段M4と、上記警報手段M3により警報が出された状態
で、上記ガスバーナによる燃焼が所定期間継続した場合
には、上記CO濃度が上記第2基準濃度を超えていなく
ても上記開閉手段M2により上記ガスバーナへのガス供
給を停止させる第2停止手段M5とを備えたことを要旨
とする。In order to solve the above-mentioned problems, an incomplete combustion preventing apparatus according to the present invention is provided with a CO sensor provided in an exhaust passage of a gas burner for detecting a CO concentration in exhaust gas, as shown in FIG. M1 is compared with an opening / closing means M2 for opening and closing a gas supply passage to the gas burner, and the detected CO concentration is compared with a preset first reference concentration, and the CO concentration exceeds the first reference concentration. Alarm means M3 for issuing an alarm when the detected CO concentration is compared with a second reference concentration higher than the first reference concentration, and when the CO concentration exceeds the second reference concentration, the opening / closing is performed. by means M2 and the first stop means M4 for stopping the gas supply to the gas burner, with the warning is issued by the warning means M3, when the combustion by the gas burner continues for a predetermined time period, the CO concentration Without exceeding the second reference density
The gist of the invention is that a second stopping means M5 for stopping the gas supply to the gas burner by the opening / closing means M2 is also provided.
【0006】[0006]
【作用】上記構成を有する本発明の不完全燃焼防止装置
は、COセンサM1によりガスバーナの排気中のCO濃
度を検出し、この濃度が第1基準濃度を超えた時に警報
手段M3が警報を出す。そして、排気再循環等によりC
O濃度がそのまま上昇して第2基準濃度を超えた場合に
は、第1停止手段M4が開閉手段M2を動作させてガス
バーナへのガス供給流路を閉じてガス供給を停止させ
る。また、CO濃度が第1基準濃度を超えて警報が出さ
れている状態で、ガスバーナによる燃焼が所定期間継続
した場合には、第2停止手段M5が開閉手段M2を動作
させてガス供給を停止させる。この結果、CO濃度が低
レベルであっても、警報後燃焼が所定期間連続されれば
ガス供給が停止されることから、排気設備不良等により
他室へCOが流出しても、安全な時期にCO流出が停止
する。In the incomplete combustion preventing apparatus according to the present invention having the above-mentioned structure, the CO sensor M1 detects the CO concentration in the exhaust gas from the gas burner, and when the concentration exceeds the first reference concentration, the alarm means M3 issues an alarm. . And, by exhaust gas recirculation etc.
If the O concentration rises and exceeds the second reference concentration, the first stopping means M4 operates the opening / closing means M2 to close the gas supply passage to the gas burner and stop the gas supply. Further, when the combustion by the gas burner continues for a predetermined period in a state where the alarm is issued because the CO concentration exceeds the first reference concentration, the second stopping means M5 operates the opening / closing means M2 to stop the gas supply. Let it. As a result, even if the CO concentration is at a low level, the gas supply is stopped if the combustion after the alarm is continued for a predetermined period of time. CO outflow stops.
【0007】[0007]
【実施例】以上説明した本発明の構成・作用を一層明確
にするために、以下本発明の不完全燃焼防止装置の好適
な実施例について説明する。図2は、一実施例としての
不完全燃焼装置を瞬間湯沸器に適用した概略構成図であ
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the configuration and operation of the present invention described above, a preferred embodiment of the incomplete combustion prevention device of the present invention will be described below. FIG. 2 is a schematic configuration diagram in which the incomplete combustion device as one embodiment is applied to an instantaneous water heater.
【0008】瞬間湯沸器の燃焼室を形成するケース10
の下部には、ガスバーナ11が配設され、ガス供給源側
から直列に配置した元電磁弁12,比例電磁弁13を有
するガス供給路14により燃料ガスが供給される。元電
磁弁12はガス流路の開閉のみを行なう弁であり、比例
電磁弁13は制御信号に応じた開度に設定されて所望の
ガス供給量に調整する制御弁である。また、ケース10
の底部にはファン15が設けられ、ガス供給量に応じた
量の燃焼用空気をケース10内に供給する。Case 10 for forming a combustion chamber of an instantaneous water heater
A gas burner 11 is provided at a lower portion of the fuel cell, and fuel gas is supplied from a gas supply source side through a gas supply path 14 having a main solenoid valve 12 and a proportional solenoid valve 13 arranged in series. The original solenoid valve 12 is a valve that only opens and closes the gas flow path, and the proportional solenoid valve 13 is a control valve that is set to an opening degree in accordance with a control signal and adjusts a desired gas supply amount. Case 10
A fan 15 is provided at the bottom of the case 10 to supply combustion air in an amount corresponding to the gas supply amount into the case 10.
【0009】ガスバーナ11の上方には熱交換器16が
配設され、給水管17から通水された水をガスバーナ1
1での燃焼熱により加熱し、給湯管18に送りだす。熱
交換器16よりも上方のケース10の上部はフード19
を経て排気筒20に連結される。そして、この排気筒2
0にCO濃度を検出するCOセンサ21が装着される。A heat exchanger 16 is disposed above the gas burner 11, and the water passed through a water supply pipe 17 is supplied to the gas burner 1.
It is heated by the heat of combustion in 1 and sent out to the hot water supply pipe 18. The upper part of the case 10 above the heat exchanger 16 has a hood 19
Through the exhaust pipe 20. And this exhaust stack 2
A CO sensor 21 for detecting the CO concentration at 0 is mounted.
【0010】また、瞬間湯沸器の前面パネル(図示略)
には、CO濃度が所定濃度(後述する第1基準濃度)に
達した時に、警報を出すための表示器22が設けられ
る。尚、本実施例では点滅タイプの表示器を用いるが、
警報ブザーを用いたり両者を組合せた構成等であっても
よい。A front panel (not shown) of the instantaneous water heater
Is provided with a display 22 for issuing an alarm when the CO concentration reaches a predetermined concentration (a first reference concentration described later). In this embodiment, a blinking type display is used.
An alarm buzzer may be used, or both may be combined.
【0011】本実施例の不完全燃焼防止装置は、このC
Oセンサ21からの信号に基づいて、電磁弁12,13
の開閉を制御するもので、瞬間湯沸器の本体内にこの制
御を司るバーナコントローラ23が設けられる。尚、こ
のバーナコントローラ23は、湯温制御,点火制御等を
も併せて行なうものであるが、本発明と直接には関係し
ないため、これらの処理に付随する構成、例えば、温度
センサ,流量センサ,点火装置等に関しては説明,図示
を省略する。The apparatus for preventing incomplete combustion according to the present embodiment uses the C
Based on the signal from the O sensor 21, the solenoid valves 12, 13
The burner controller 23 is provided in the main body of the instantaneous water heater. The burner controller 23 also performs hot water temperature control, ignition control, and the like, but is not directly related to the present invention, and thus has a configuration accompanying these processes, such as a temperature sensor and a flow sensor. Description and illustration of the ignition device and the like are omitted.
【0012】バーナコントローラ23は、図示しない算
術論理演算回路を構成するCPU,RAM,ROMと、
駆動回路,入出力インタフェース等を備えたマイクロコ
ンピュータであり、COセンサ21からの検出信号を入
力し、検出されたCO濃度に応じて、電磁弁12,13
を駆動してガス流路の開閉を制御する。The burner controller 23 includes a CPU, a RAM, and a ROM constituting an arithmetic and logic operation circuit (not shown);
The microcomputer is provided with a drive circuit, an input / output interface, and the like. The microcomputer receives a detection signal from the CO sensor 21 and operates according to the detected CO concentration.
To control the opening and closing of the gas flow path.
【0013】図3は、バーナコントローラ23が実行す
る不完全燃焼防止制御ルーチンを表すフローチャートで
あり、点火操作にあわせて起動する。本ルーチンが起動
すると、まず、COセンサ21の信号を読み込み、CO
濃度が第1基準濃度C1以上か否かを判断する(S1
0)。CO濃度が低く第1基準濃度C1に達しない間
は、この処理を継続する。排気再循環あるいは燃焼生成
物による熱交換器16のフィン,排気筒20の詰り等に
よりCO濃度が第1基準濃度C1以上になると、表示器
22を点滅させて使用者に警報を出すと共に、タイマを
起動させる(S11)。FIG. 3 is a flowchart showing an incomplete combustion prevention control routine executed by the burner controller 23, and is started in accordance with the ignition operation. When this routine starts, first, the signal of the CO sensor 21 is read and the CO
It is determined whether the density is equal to or higher than the first reference density C1 (S1).
0). This process is continued while the CO concentration is low and does not reach the first reference concentration C1. When the CO concentration becomes equal to or higher than the first reference concentration C1 due to exhaust gas recirculation or clogging of the fins of the heat exchanger 16 and the exhaust stack 20 due to combustion products, the display 22 is turned on and off, and an alarm is issued to the user. Is activated (S11).
【0014】次に、CO濃度が第2基準濃度C2(C2
>C1)以上か否かを判断し(S12)、第2基準濃度
C2以上であれば電磁弁12,13を閉状態にして器具
を停止する(S13)。また、同時にタイマをリセット
すると共に警報表示されていた表示器22の点滅を停止
する。Next, the CO concentration becomes equal to the second reference concentration C2 (C2
> C1) or not (S12), and if it is equal to or higher than the second reference concentration C2, the electromagnetic valves 12 and 13 are closed to stop the appliance (S13). At the same time, the timer is reset, and the blinking of the display 22 on which the alarm is displayed is stopped.
【0015】ステップ12において、CO濃度が第2基
準濃度C2未満であると判断した場合には、タイムアッ
プしたか否か、つまり、警報を出してから所定期間T経
過したか否かを判断し(S14)、タイムアップしてい
なければステップ12の処理に移行する。If it is determined in step 12 that the CO concentration is less than the second reference concentration C2, it is determined whether or not the time has elapsed, that is, whether or not a predetermined period T has elapsed since the alarm was issued. (S14) If the time has not expired, the flow shifts to the processing of step 12.
【0016】即ち、この不完全燃焼防止制御処理は、図
4に示すように、CO濃度が上昇して第1基準濃度C1
に達すると表示器22により警報を出し、そのまま継続
して器具が使用された場合には、同図(ア)に示すよう
に、排気再循環等によりCO濃度がそのまま上昇して第
2基準濃度にまで達したときに器具を停止し、同図
(イ)に示すように、燃焼生成物の付着等により第2基
準濃度C2には達しないものの所定期間Tのあいだ警報
が出された場合には器具を停止する。That is, in this incomplete combustion prevention control processing, as shown in FIG. 4, the CO concentration increases and the first reference concentration C1
Is reached, an alarm is issued by the display 22. If the appliance is used continuously, the CO concentration directly increases due to exhaust gas recirculation and the second reference concentration as shown in FIG. When the temperature reaches the second reference concentration C2, the appliance is stopped when the second reference concentration C2 is not reached due to the adhesion of combustion products or the like, as shown in FIG. Stops the appliance.
【0017】この結果、警報により燃焼生成物の除去時
期を認知できるだけでなく、使用者が警報を無視して連
続使用した場合においても、CO濃度が高くなれば器具
を停止し、CO濃度が低くても排気設備不良等による他
室へのCO流出をも考慮して所定期間T経過後に器具を
停止するため、器具設置室だけでなく他室においても非
常に安全性が高い。As a result, not only can the time of removal of the combustion products be recognized by the alarm, but even if the user ignores the alarm and continuously uses the apparatus, if the CO concentration becomes high, the apparatus is stopped and the CO concentration becomes low. However, since the equipment is stopped after the elapse of the predetermined period T in consideration of the outflow of CO to another room due to defective exhaust equipment or the like, the safety is extremely high not only in the equipment installation room but also in the other room.
【0018】以上本発明の実施例について説明したが、
本発明はこうした実施例に何等限定されるものでなく、
本発明の要旨を逸脱しない範囲で様々な態様で実施し得
ることは勿論である。The embodiments of the present invention have been described above.
The present invention is not limited to these examples in any way,
It goes without saying that the present invention can be implemented in various modes without departing from the gist of the present invention.
【0019】[0019]
【発明の効果】以上説明したように本発明の不完全燃焼
防止装置は、警報が出された状態で所定期間経過した場
合にはガス供給を停止するため、燃焼機器が設置された
部屋だけでなく、排気設備不良等による他室へのCO流
出にも対処され、極めて高い安全性能を有するという優
れた効果を奏する。As described above, the incomplete combustion prevention device of the present invention stops the gas supply when a predetermined period has elapsed with an alarm being issued, so that only the room where the combustion equipment is installed is provided. In addition, it is possible to cope with the outflow of CO to other rooms due to defective exhaust equipment and the like, and has an excellent effect of having extremely high safety performance.
【図1】本発明の基本的構成を例示するブロック図であ
る。FIG. 1 is a block diagram illustrating a basic configuration of the present invention.
【図2】一実施例としての不完全燃焼防止装置を瞬間湯
沸器に適用した概略構成図である。FIG. 2 is a schematic configuration diagram in which an incomplete combustion prevention device as one embodiment is applied to an instantaneous water heater.
【図3】不完全燃焼防止制御ルーチンを表すフローチャ
ートである。FIG. 3 is a flowchart illustrating an incomplete combustion prevention control routine.
【図4】不完全燃焼防止装置の動作説明図である。FIG. 4 is an operation explanatory view of the incomplete combustion prevention device.
【図5】排気設備の不良状態を表す説明図である。FIG. 5 is an explanatory diagram showing a defective state of the exhaust equipment.
10…ケース,11…ガスバーナ,12…元電磁弁,1
3…比例電磁弁,14…ガス供給路,20…排気筒,2
1…COセンサ,22…表示器,23…バーナコントロ
ーラReference numeral 10: case, 11: gas burner, 12: original solenoid valve, 1
3: proportional solenoid valve, 14: gas supply path, 20: exhaust cylinder, 2
1: CO sensor, 22: Display, 23: Burner controller
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7,DB名) F23N 5/24 107 F23N 5/00 F23N 5/26 101 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) F23N 5/24 107 F23N 5/00 F23N 5/26 101
Claims (1)
のCO濃度を検出するCOセンサと、 上記ガスバーナへのガス供給流路の開閉を行なう開閉手
段と、 上記検出されたCO濃度と予め設定した第1基準濃度と
を比較し、そのCO濃度が該第1基準濃度を超えた場合
に警報を出す警報手段と、 上記検出されたCO濃度と上記第1基準濃度より高い第
2基準濃度とを比較し、そのCO濃度が該第2基準濃度
を超えた場合に上記開閉手段により上記ガスバーナへの
ガス供給を停止させる第1停止手段と、 上記警報手段により警報が出された状態で、上記ガスバ
ーナによる燃焼が所定期間継続した場合には、上記CO
濃度が上記第2基準濃度を超えていなくても上記開閉手
段により上記ガスバーナへのガス供給を停止させる第2
停止手段とを備えてなる不完全燃焼防止装置。1. A CO sensor provided in an exhaust passage of a gas burner for detecting a CO concentration in exhaust gas, opening / closing means for opening / closing a gas supply passage to the gas burner, and setting the detected CO concentration in advance. An alarming means for comparing the CO concentration with the first reference concentration and issuing an alarm when the CO concentration exceeds the first reference concentration; and detecting the detected CO concentration and a second reference concentration higher than the first reference concentration. A first stop means for stopping the supply of gas to the gas burner by the opening / closing means when the CO concentration exceeds the second reference concentration; and when the combustion by continues for a predetermined time period, the CO
Even if the concentration does not exceed the second reference concentration , the gas supply to the gas burner is stopped by the opening / closing means.
An incomplete combustion prevention device comprising a stopping means.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3201352A JP3021811B2 (en) | 1991-07-15 | 1991-07-15 | Incomplete combustion prevention device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3201352A JP3021811B2 (en) | 1991-07-15 | 1991-07-15 | Incomplete combustion prevention device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0526440A JPH0526440A (en) | 1993-02-02 |
JP3021811B2 true JP3021811B2 (en) | 2000-03-15 |
Family
ID=16439614
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3201352A Expired - Fee Related JP3021811B2 (en) | 1991-07-15 | 1991-07-15 | Incomplete combustion prevention device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3021811B2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7166134B2 (en) * | 2018-10-15 | 2022-11-07 | リンナイ株式会社 | Combustion device |
JP7154096B2 (en) * | 2018-10-15 | 2022-10-17 | リンナイ株式会社 | Combustion device |
JP7165593B2 (en) * | 2019-01-28 | 2022-11-04 | リンナイ株式会社 | Combustion device |
-
1991
- 1991-07-15 JP JP3201352A patent/JP3021811B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH0526440A (en) | 1993-02-02 |
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