JP3523389B2 - Pressure detector for closed gas stove - Google Patents
Pressure detector for closed gas stoveInfo
- Publication number
- JP3523389B2 JP3523389B2 JP27460795A JP27460795A JP3523389B2 JP 3523389 B2 JP3523389 B2 JP 3523389B2 JP 27460795 A JP27460795 A JP 27460795A JP 27460795 A JP27460795 A JP 27460795A JP 3523389 B2 JP3523389 B2 JP 3523389B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- combustion
- combustion chamber
- test tube
- blower
- 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
- Regulation And Control Of Combustion (AREA)
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、燃焼用送風機の送風圧
を主要構造部で検圧する密閉式ガスストーブの圧力検知
装置に関するものである。
【０００２】
【従来の技術】従来の一般的な密閉式ガスストーブの圧
力検知装置は、図２に示すとおり、低圧側は大気圧に設
置するのが一般的であった。
【０００３】また、図３に示す如く低圧側を燃焼用送風
機の吸込み側にし、検圧圧力値を高めた方法もあった
が、本発明のような燃焼室の圧力と送風機出口部の圧力
の差圧を検知するものはなかった。
【０００４】（たとえば、実公昭６２−２９７８３号公
報参照のこと）
【０００５】
【発明が解決しようとする課題】しかしながら、前記従
来例にみられるような燃焼用送風機６の送風圧のみの検
圧で送風能力異常時を検圧するものであったため、給排
気筒９の給気側の閉塞に対しては、吸気不足により風圧
スイッチ１の差圧が上がらずスイツチが入らないため、
問題なく運転停止するが、給排気筒９の排気側の閉塞に
対しては、風圧スイツチ１の圧力差は上昇し、風圧スイ
ツチ１が入り運転状態時には異常燃焼が継続する問題が
あった。
【０００６】本発明の目的は、給排気筒９の給気側の閉
塞に加え、排気側の閉塞にも対応して検圧し、燃焼限界
時、運転停止させることにある。
【０００７】
【課題を解決するための手段】本発明は、上記の課題を
解決するためになされたものであり、燃焼用送風機の送
風圧を検知する風圧スイッチを有し、風圧スイッチの高
圧側検圧管を燃焼用送風機の送風側に設けた送風室内の
風量切替えソレノイドダンパの手前に設けるとともに、
風圧スイッチの低圧側検圧管を密閉式ガスストーブの燃
焼室に設け、さらに風圧スイッチの低圧側検圧管を燃焼
室接続部より昇り勾配にして設置するものとした。
【０００８】
【作用】本発明は、風圧スイッチの高圧側を送風室の風
量切替えソレノイドダンパの手前に接続し、低圧側を燃
焼室に接続するとともに、低圧側検圧管は、燃焼室接続
部より昇り勾配形状に構成し、風圧スイッチを燃焼室接
続部より高い位置とする構成にしたことにより、ストー
ブ運転開始時又は強燃焼での運転中に給排気筒の給気側
が閉塞状態になり、燃焼限界となった場合、吸込み空気
量の減少により送風室と燃焼室の内圧が下がり差圧がと
れなくなって風圧スイツチがオフし、運転停止となる。
【０００９】同様に、給排気筒の排気側が閉塞状態にな
り、燃焼限界となった場合は、吐出し空気量の減少によ
り燃焼室の内圧が上がり送風室との差圧がとれなくなっ
て風圧スイッチがオフし運転停止となる。
【００１０】また、弱燃焼での運転中においても、風量
切替えソレノイドダンパは送風経路を閉じた状態にし、
燃焼用空気量を制限しているが、給気閉塞時及び排気閉
塞時においても強燃焼での運転に比べて差圧の圧力値は
上がるが、閉塞率を高まると強燃焼同様の動作をする。
【００１１】
【実施例】以下、本発明の一実施例を示す図面に従って
説明する。
【００１２】実施例の構成は図１に示すとおり、１は圧
力を検知するたとえばダイヤフラム式等からなる風圧ス
イッチであり、その高圧側が燃焼用送風機６内送風室５
の風量切り替えソレノイドダンパ７手前に設けた高圧側
検圧管３に接続してある。
【００１３】２は例えばステンレス製からなる低圧側検
圧管であり、風圧スイツチ１の低圧側と燃焼器に設けて
ある燃焼室４に連通するように接続され、燃焼室４の側
部に設ける燃焼室接続部２ｂより風圧スイツチ１低圧側
へ上り勾配形状で配置してある。
【００１４】８は燃焼室４手前に設けられた燃焼用空気
室であり、９は屋外から燃焼用空気を取り入れ、燃焼排
気ガスを屋外へ排出するための給排気筒であり、１０は
バーナであり、１１は高圧放電の点火装置であり、１２
は燃焼炎を監視する炎検知装置であり、１３は対流用送
風機であり、１４は熱交換器であり、１５は燃料供給装
置である。
【００１５】次に、前記構成における作用を説明する。
【００１６】通常運転中、低圧側検圧管２は燃焼室４側
と風圧スイツチ１側の温度差及び風圧スイツチ１の許容
範囲内での気密漏れのために使用環境条件によっては長
期連続燃焼すると、低圧側検圧管２の風圧スイツチ１側
出口で結露水が検圧管２内面に付着する現象が発生す
る。
【００１７】この時、低圧側検圧管２を水平にすると管
内に結露水が溜り続け、管内を塞ぎ圧力の流通を阻害す
る。
【００１８】同様に、低圧側検圧管２を燃焼室接続部２
ｂより下げた位置にしても溜った結露水が管内を塞ぎ圧
力の流通を阻害し、且つ風圧スイッチ１へ流入する欠点
を防止するため、図１に示す如く、低圧側検圧管２は上
がり勾配形状に構成し、強・弱・停止・再運転の燃焼室
４の圧力変化を利用して結露水を燃焼室４へ落差により
滴下させ、結露水が管内に溜るのを防止する。
【００１９】ストーブ運転時、給排気筒９の給気側もし
くは排気側が障害物（雪・鳥の巣等）で閉塞状態になっ
て燃焼限界に近づいた場合、燃焼用空気不足により高濃
度の一酸化炭素（２００ｐｐｍ以上）、二酸化炭素（１
３％以上）が発生する。
【００２０】この場合、吸い込み空気量または吐き出し
空気量の減少により、送風室５と燃焼室４との差圧が下
がる。
【００２１】この差圧を検知して燃焼限界前に風圧スイ
ッチ１により運転制御回路を遮断し運転を止める。
【００２２】再運転操作しても、圧力差がなく風圧スイ
ツチ１はオンせず燃焼はしない。
【００２３】通常運転中は、燃焼室４側は温度が高い
（約３００℃）及び風圧スイッチ１の許容範囲内気密漏
れ（２０cc／分 ａｔ ４９０Pa）のために運転環境条件
によって長時間連続燃焼すると低圧側検圧管２の風圧ス
イッチ１側出口で結露が発生して、検圧管２の内面に付
着し、結露水が溜り続け、管内を塞ぎ圧力の流通を阻害
するが、低圧側検圧管２を上り勾配に構成したことによ
り、強・弱・停止・再運転の燃焼室４の圧力変化によ
り、その都度、結露水を燃焼室４へ落差により滴下させ
る。
【００２４】
【発明の効果】以上述べたように、本発明によれば、風
圧スイツチの低圧側検圧管を燃焼室に連通して設けたこ
とにより、給気閉塞時はもちろん排気閉塞時にあいても
異常燃焼による圧力変化を検知し、未然に燃焼を停止
し、危険を防止出来るため、安全性を更に向上する。
【００２５】さらに、風圧スイツチの低圧側検圧管に上
り勾配を設けたことにより、検圧管内の結露水の付着に
よって起こる圧力変動等の動作不良を防止出来るため、
極めて信頼性の高い密閉式ガスストーブの圧力検知装置
を提供できるものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure detecting device for a closed gas stove for detecting a blowing pressure of a combustion blower at a main structure. 2. Description of the Related Art As shown in FIG. 2, a conventional general closed type gas stove pressure detecting device is generally installed at atmospheric pressure on the low pressure side. Further, as shown in FIG. 3, there is a method in which the low pressure side is set to the suction side of the combustion blower to increase the detection pressure value. However, as in the present invention, the pressure of the combustion chamber and the pressure of the outlet of the blower are reduced. Nothing could detect the differential pressure. (See, for example, Japanese Utility Model Publication No. Sho 62-29783.) However, the pressure detection of only the blowing pressure of the combustion blower 6 as seen in the prior art described above. Since the pressure is detected when the air blowing capacity is abnormal, the differential pressure of the wind pressure switch 1 does not increase and the switch does not enter due to insufficient intake air for the blockage of the air supply / exhaust cylinder 9 on the air supply side.
Although the operation is stopped without any problem, the pressure difference of the wind pressure switch 1 increases with respect to the blockage of the supply / exhaust tube 9 on the exhaust side, and there is a problem that abnormal combustion continues when the wind pressure switch 1 is turned on and in an operation state. An object of the present invention is to detect the pressure in response to the blockage on the exhaust side in addition to the blockage on the supply side of the supply / exhaust cylinder 9, and to stop the operation at the combustion limit. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a wind pressure switch for detecting a blowing pressure of a combustion blower. A test tube is provided in front of the air volume switching solenoid damper in the blower chamber provided on the blower side of the combustion blower,
The low pressure side test tube of the wind pressure switch is provided in the combustion chamber of the closed gas stove, and the low pressure side test tube of the wind pressure switch is installed so as to be higher than the connection portion of the combustion chamber. According to the present invention, the high pressure side of the wind pressure switch is connected to the front of the air volume switching solenoid damper of the blower chamber, the low pressure side is connected to the combustion chamber, and the low pressure side test tube is connected to the combustion chamber connection portion. By adopting a configuration in which the wind pressure switch is positioned higher than the connection section of the combustion chamber, the air supply side of the air supply / exhaust cylinder is closed at the start of stove operation or during operation with strong combustion, and When the limit is reached, the internal pressure between the blower chamber and the combustion chamber decreases due to a decrease in the amount of intake air, so that the differential pressure cannot be obtained, the wind pressure switch is turned off, and the operation is stopped. Similarly, when the exhaust side of the air supply / exhaust cylinder is closed and reaches the combustion limit, the internal pressure of the combustion chamber rises due to the decrease in the amount of discharged air, and the pressure difference between the air supply chamber and the blower chamber cannot be obtained. Turns off and the operation stops. In addition, even during operation in weak combustion, the air volume switching solenoid damper closes the air flow path,
Although the amount of combustion air is restricted, the pressure value of the differential pressure increases when the air supply is blocked and the exhaust is blocked, as compared with the operation in the strong combustion, but when the blocking rate is increased, the same operation as the strong combustion is performed. . An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, an embodiment of the present invention has a wind pressure switch 1 of a diaphragm type or the like for detecting a pressure, and a high pressure side thereof has a blower chamber 5 in a combustion blower 6.
Is connected to the high pressure side test tube 3 provided in front of the air volume switching solenoid damper 7. Reference numeral 2 denotes a low-pressure side test tube made of, for example, stainless steel, which is connected so as to communicate with a low-pressure side of the wind pressure switch 1 and a combustion chamber 4 provided in a combustor, and is provided on a side of the combustion chamber 4. The air pressure switch 1 is arranged in an upward slope from the chamber connection portion 2b to the low pressure side. Reference numeral 8 denotes a combustion air chamber provided in front of the combustion chamber 4, reference numeral 9 denotes a supply / exhaust tube for taking in combustion air from outside and discharging combustion exhaust gas to the outside, and reference numeral 10 denotes a burner. And 11 is a high pressure discharge ignition device, and 12
Is a flame detection device for monitoring the combustion flame, 13 is a convection blower, 14 is a heat exchanger, and 15 is a fuel supply device. Next, the operation of the above configuration will be described. During normal operation, the low-pressure-side test tube 2 is subjected to long-term continuous combustion depending on the use environment conditions due to a temperature difference between the combustion chamber 4 and the wind pressure switch 1 and an airtight leak within an allowable range of the wind pressure switch 1. At the outlet of the low pressure side test tube 2 on the wind pressure switch 1 side, a phenomenon occurs in which dew condensation water adheres to the inner surface of the test tube 2. At this time, if the low pressure side test tube 2 is made horizontal, dew condensation water continues to accumulate in the tube, blocking the inside of the tube and obstructing the flow of pressure. Similarly, the low pressure side test tube 2 is connected to the combustion chamber connecting portion 2.
As shown in FIG. 1, the low-pressure side test tube 2 has an upward slope as shown in FIG. The condensed water is dropped into the combustion chamber 4 by using a pressure change in the combustion chamber 4 of strong / weak / stop / re-operate to prevent the condensed water from accumulating in the pipe. During the stove operation, if the air supply side or the exhaust side of the air supply / exhaust cylinder 9 is blocked by an obstacle (snow, bird's nest, etc.) and approaches the combustion limit, a high concentration of air due to a shortage of combustion air. Carbon oxide (200 ppm or more), carbon dioxide (1
3% or more) occurs. In this case, the pressure difference between the blower chamber 5 and the combustion chamber 4 decreases due to a decrease in the intake air amount or the discharge air amount. The differential pressure is detected and the operation control circuit is shut off by the wind pressure switch 1 before the limit of combustion to stop the operation. Even if the operation is restarted, there is no pressure difference, the wind pressure switch 1 is not turned on, and combustion does not occur. During normal operation, if the combustion chamber 4 is continuously burned for a long time depending on the operating environment conditions due to high temperature (about 300 ° C.) and airtight leakage within the allowable range of the wind pressure switch 1 (20 cc / min at 490 Pa). Condensation occurs at the outlet of the low pressure side test tube 2 on the wind pressure switch 1 side, adheres to the inner surface of the test tube 2, and the dew condensation water continues to accumulate, blocking the inside of the tube and obstructing the flow of pressure. Due to the upward gradient, dew condensation water is dropped into the combustion chamber 4 by a head due to a pressure change in the combustion chamber 4 during strong / weak / stop / restart. As described above, according to the present invention, since the low pressure side test tube of the wind pressure switch is provided in communication with the combustion chamber, not only when the air supply is blocked but also when the exhaust gas is blocked. In addition, since a pressure change due to abnormal combustion is detected and combustion is stopped beforehand, and danger can be prevented, safety is further improved. Further, by providing an ascending gradient on the low pressure side test tube of the wind pressure switch, it is possible to prevent malfunctions such as pressure fluctuations caused by adhesion of dew water in the test tube.
It is possible to provide an extremely reliable pressure detector for a closed gas stove.
【図面の簡単な説明】
【図１】本発明の一実施例を示す密閉式ガスストーブの
圧力検知装置の断面図である。
【図２】従来の一実施例を示す密閉式ガスストーブの圧
力検知装置の断面図である。
【図３】従来の他の一実施例を示す密閉式ガスストーブ
の圧力検知装置の断面図である。
【符号の説明】
１ 風圧スイッチ
２ 低圧側検圧管
２ｂ 燃焼室接続部
３ 高圧側検圧管
４ 燃焼室
５ 送風室
６ 燃焼用送風機
７ 風量切替えソレノイドダンパBRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a pressure sensing device for a closed gas stove showing one embodiment of the present invention. FIG. 2 is a cross-sectional view of a pressure sensing device for a closed gas stove showing one embodiment of the related art. FIG. 3 is a cross-sectional view of a pressure sensing device of a closed gas stove showing another embodiment of the related art. [Description of Signs] 1 Wind pressure switch 2 Low pressure side test tube 2b Combustion chamber connection part 3 High pressure side test tube 4 Combustion chamber 5 Blow room 6 Combustion blower 7 Air volume switching solenoid damper
フロントページの続き (56)参考文献 特開 平４−155116（ＪＰ，Ａ) 特開 平４−64813（ＪＰ，Ａ) 実開 昭52−139445（ＪＰ，Ｕ) 実開 昭64−22154（ＪＰ，Ｕ) 実開 昭58−46041（ＪＰ，Ｕ) 特公 平７−76612（ＪＰ，Ｂ２) 実公 昭63−50592（ＪＰ，Ｙ２) (58)調査した分野(Int.Cl.7，ＤＢ名) F23N 5/18 Continuation of the front page (56) References JP-A-4-155116 (JP, A) JP-A-4-64813 (JP, A) Japanese Utility Model Application No. 52-139445 (JP, U) Japanese Utility Model Application Utility Model No. 64-22154 (JP , U) Japanese Utility Model Showa 58-46041 (JP, U) Japanese Patent Publication No. 7-76612 (JP, B2) Japanese Utility Model Showa 63-50592 (JP, Y2) (58) Fields surveyed (Int. Cl. 7 , DB Name) F23N 5/18
Claims (1)
圧スイッチ（１）を有し、風圧スイッチ（１）の高圧側
に設けた高圧側検圧管（３）を燃焼用送風機(６)の送風
側に設ける送風室（５）内の風量切替えソレノイドダン
パ（７）の手前に設けるとともに、風圧スイッチ（１）
の低圧側に設けた低圧側検圧管（２）を密閉式ガススト
ーブの燃焼室（４）の側部に開設する燃焼室接続部（２
ｂ）に設け、さらに風圧スイッチ（１）の低圧側検圧管
（２）を燃焼室（４）の燃焼室接続部（２ｂ）より昇り
勾配にして設置することを特徴とする密閉式ガスストー
ブの圧力検知装置。(57) [Claims 1] A high pressure side test tube which has a wind pressure switch (1) for detecting a blowing pressure of a combustion blower (6) and is provided on a high pressure side of the wind pressure switch (1). (3) is provided in front of an air volume switching solenoid damper (7) in a blower chamber (5) provided on the blower side of a combustion blower (6), and a wind pressure switch (1).
The low pressure side test tube (2) provided on the low pressure side of the combustion chamber connection part (2) opened on the side of the combustion chamber (4) of the closed gas stove
b), wherein the low pressure side test tube (2) of the wind pressure switch (1) is installed at a gradient higher than the combustion chamber connection part (2b) of the combustion chamber (4). Pressure detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27460795A JP3523389B2 (en) | 1995-10-24 | 1995-10-24 | Pressure detector for closed gas stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27460795A JP3523389B2 (en) | 1995-10-24 | 1995-10-24 | Pressure detector for closed gas stove |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09112893A JPH09112893A (en) | 1997-05-02 |
| JP3523389B2 true JP3523389B2 (en) | 2004-04-26 |
Family
ID=17544097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27460795A Expired - Fee Related JP3523389B2 (en) | 1995-10-24 | 1995-10-24 | Pressure detector for closed gas stove |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3523389B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7006363B2 (en) * | 2018-02-22 | 2022-01-24 | 三浦工業株式会社 | Boiler device |
| CN109405295A (en) * | 2018-10-29 | 2019-03-01 | 华帝股份有限公司 | Pressure taking device and gas water heater or wall-mounted boiler with same |
-
1995
- 1995-10-24 JP JP27460795A patent/JP3523389B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09112893A (en) | 1997-05-02 |
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