JP2008014551A - Warm air heater - Google Patents

Warm air heater Download PDF

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JP2008014551A
JP2008014551A JP2006185121A JP2006185121A JP2008014551A JP 2008014551 A JP2008014551 A JP 2008014551A JP 2006185121 A JP2006185121 A JP 2006185121A JP 2006185121 A JP2006185121 A JP 2006185121A JP 2008014551 A JP2008014551 A JP 2008014551A
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sensor
air
electrochemical
burner
combustion
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JP4567636B2 (en
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Yoshihiko Takasu
芳彦 高須
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Rinnai Corp
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Rinnai Corp
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]

Abstract

<P>PROBLEM TO BE SOLVED: To provide a warm air heater which accurately detects incomplete combustion of a burner. <P>SOLUTION: The warm air heater is provided with: the burner 11; a fan 13 sucking in air from a suction opening 15, and sending out mixed gas c of air sucked in from the suction opening 15 and combustion exhaust gas of the burner 11 from a warm air blowout opening 12; an electrochemical type CO sensor 18 provided in a sending path X for the mixed gas c to output an electric current proportional to a concentration of carbon monoxide in the mixed gas c by an oxidation/reduction reaction with the carbon monoxide in the mixed gas c; an introduction passage Y introducing the air sucked in from the suction opening 15 to an installation position vicinity of the electrochemical type CO sensor 18 of a bulkhead 30; and a combustion state detecting means for detecting a combustion state of the burner 11 on the basis of the output current of the electrochemical type CO sensor 18. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、バーナの燃焼異常を検知する機能を有する温風暖房機に関する。   The present invention relates to a warm air heater having a function of detecting burner combustion abnormality.

例えば室内開放型のガス温風暖房機において、バーナの近傍に設けた熱電対の熱起電力により室内の酸素濃度の低下を監視し、バーナの不完全燃焼による酸素の濃度の低下に応じて換気装置を作動させるようにしたものが知られている(例えば、特許文献1参照)。しかし、熱電対による場合には、熱電対の設置箇所における局所的なバーナの燃焼状態を検出ことになるため、部分的なバーナの不完全燃焼を検出できない場合があり、バーナの不完全燃焼を精度良く検出することが困難であった。   For example, in an indoor open-type gas hot air heater, the decrease in the oxygen concentration in the room is monitored by the thermoelectromotive force of a thermocouple provided near the burner, and ventilation is performed according to the decrease in oxygen concentration due to incomplete combustion of the burner. An apparatus that operates the apparatus is known (for example, see Patent Document 1). However, in the case of using a thermocouple, the local burner combustion state at the location where the thermocouple is installed may be detected, so partial burner incomplete combustion may not be detected. It was difficult to detect with high accuracy.

また、バーナの不完全燃焼の検出を、バーナの燃焼排ガス中のCO(一酸化炭素)の濃度をCOセンサにより検出することによって行うことも考えられるが、COセンサとして一般に使用されている接触燃焼式COセンサは振動に弱く、持ち運んで使用されることが多い室内開放型のガス温風暖房機に使用した場合には、精度の保証が困難であった。   It is also conceivable to detect incomplete combustion of the burner by detecting the concentration of CO (carbon monoxide) in the combustion exhaust gas of the burner with a CO sensor, but catalytic combustion generally used as a CO sensor. The type CO sensor is vulnerable to vibration, and when used in an indoor open type gas hot air heater that is often carried and used, it is difficult to guarantee accuracy.

また、振動に強いCOセンサとして半導体式COセンサがあるが、経時変化に対応して検出精度を維持するために定期的なCOセンサの点検や交換が必要であり、メンテナンスの負担から採用が難しかった。
特開平10−205750号公報
In addition, there is a semiconductor-type CO sensor as a CO sensor that is resistant to vibration. However, periodic maintenance and inspection of the CO sensor is necessary to maintain detection accuracy in response to changes over time, and it is difficult to adopt due to the burden of maintenance. It was.
Japanese Patent Laid-Open No. 10-205750

本発明は上記背景を鑑みてなされたものであり、バーナの不完全燃焼を精度良く検出することができる温風暖房装置を提供することを目的とする。   This invention is made | formed in view of the said background, and it aims at providing the warm air heating apparatus which can detect the incomplete combustion of a burner accurately.

上記目的を達成するため、本発明は、バーナと、吸気口から空気を吸入すると共に、該吸気口から吸入した空気と該バーナの燃焼排ガスとの混合気を温風吹出口から送出する送風ファンと、前記混合気の送出経路に設けられ、前記混合気中の一酸化炭素との酸化・還元反応により、前記混合気中の一酸化炭素の濃度に比例した電流を出力する電気化学式COセンサと、該電気化学式COセンサの出力電流に基いて、前記バーナの燃焼状態を検知する燃焼状態検知手段とを備えたことを特徴とする。   In order to achieve the above object, the present invention includes a burner, a blower fan that sucks air from an intake port, and sends a mixture of air sucked from the intake port and combustion exhaust gas of the burner from a hot air outlet. An electrochemical CO sensor that is provided in the air-fuel mixture delivery path and outputs a current proportional to the concentration of carbon monoxide in the gas mixture by an oxidation / reduction reaction with carbon monoxide in the gas mixture; Combustion state detection means for detecting the combustion state of the burner based on the output current of the electrochemical CO sensor is provided.

ここで、電気化学式COセンサは、上述した接触燃焼式COセンサや半導体式COセンサに比べてCOの検出精度が高いが、使用環境温度に制限がある(例えば80度以下)。そのため、高温となるバーナの燃焼排ガス中のCO濃度を電気化学式COセンサで検出することは難しい。   Here, the electrochemical CO sensor has higher CO detection accuracy than the above-described catalytic combustion type CO sensor and semiconductor type CO sensor, but has a limited operating environment temperature (for example, 80 degrees or less). For this reason, it is difficult to detect the CO concentration in the combustion exhaust gas of the burner at a high temperature with an electrochemical CO sensor.

そこで、本発明においては、前記電気化学式COセンサを、前記送風ファンにより送出される前記吸気口から吸入した空気と燃焼排ガスとの混合気の送出経路に設け、前記電気化学式COセンサにより該混合気中のCO濃度を検出する。この場合、混合気の温度は空気との混合により燃焼排ガスの温度よりも低くなるので、電気化学式COセンサの使用が可能となる。そして、前記バーナの不完全燃焼が生じて燃焼排ガス中のCOの濃度が高まると、それに応じて前記混合気中のCO濃度も高くなるので、前記混合気中のCO濃度を前記電気化学式COセンサを用いて検出することで、前記バーナの燃焼状態を精度良く検知することができる。   Therefore, in the present invention, the electrochemical CO sensor is provided in a delivery path of a mixture of air sucked from the intake port sent out by the blower fan and combustion exhaust gas, and the mixture is detected by the electrochemical CO sensor. The CO concentration in the medium is detected. In this case, the temperature of the air-fuel mixture becomes lower than the temperature of the combustion exhaust gas by mixing with air, so that an electrochemical CO sensor can be used. When the incomplete combustion of the burner occurs and the concentration of CO in the combustion exhaust gas increases, the CO concentration in the mixture also increases accordingly. Therefore, the CO concentration in the mixture is determined by the electrochemical CO sensor. By detecting using this, the combustion state of the burner can be accurately detected.

また、前記混合気の送出経路に設けられて、前記混合気の流通を局所的に妨げる流通制限手段を備え、前記電気化学式COセンサは、該流通制限手段の下流側の近傍に設けられていることを特徴とする。   In addition, it is provided with a flow restriction means that is provided in the gas mixture delivery path and locally blocks the flow of the gas mixture, and the electrochemical CO sensor is provided in the vicinity of the downstream side of the flow restriction means. It is characterized by that.

かかる本発明によれば、前記流通制限手段により前記電気化学式COセンサに向かう混合気の流量が低減され、これにより前記電気化学式COセンサの温度上昇を抑えることができる。   According to the present invention, the flow restriction means reduces the flow rate of the air-fuel mixture toward the electrochemical CO sensor, thereby suppressing the temperature rise of the electrochemical CO sensor.

また、前記流通制限手段として貫通孔を有する緩衝板を有し、前記電気化学式COセンサの周囲に、該貫通孔以外から前記電気化学式COセンサへの前記混合気の流入を妨げるための遮蔽板を備えたことを特徴とする。   In addition, a buffer plate having a through hole as the flow restriction means, and a shielding plate for preventing the mixture from flowing into the electrochemical CO sensor from other than the through hole around the electrochemical CO sensor It is characterized by having.

かかる本発明によれば、前記緩衝板により前記電気化学式COセンサに向かう前記混合気の流量を減少させると共に、前記遮蔽板により前記緩衝板に設けられた貫通孔以外からの前記混合気の流入を排除することによって、前記混合気による前記電気化学式COセンサの温度上昇をさらに抑制することができる。   According to this invention, the flow rate of the air-fuel mixture toward the electrochemical CO sensor is reduced by the buffer plate, and the inflow of the air-fuel mixture from other than the through holes provided in the buffer plate is prevented by the shielding plate. By eliminating, the temperature increase of the electrochemical CO sensor due to the gas mixture can be further suppressed.

また、前記電気化学式COセンサは、前記混合気の送出路を形成する隔壁に取り付けられ、前記吸気口から吸入された空気を、前記隔壁を介して前記電気化学式COセンサと対向する箇所に導入する導入路を備えたことを特徴とする。   In addition, the electrochemical CO sensor is attached to a partition wall that forms the air-fuel mixture delivery path, and introduces air sucked from the intake port to a location facing the electrochemical CO sensor through the partition wall. An introduction path is provided.

かかる本発明によれば、前記吸気口から吸入されて前記導入路に供給される空気によって、前記電気化学式COセンサが取り付けられた隔壁の裏面が冷却される。そして、これにより、前記電気化学式COセンサの温度上昇を抑えることができる。   According to the present invention, the back surface of the partition wall to which the electrochemical CO sensor is attached is cooled by the air sucked from the intake port and supplied to the introduction path. And thereby, the temperature rise of the electrochemical CO sensor can be suppressed.

本発明の実施の形態について、図1〜図4を参照して説明する。図1はガス温風暖房機の正面図、図2は図1に示したガス温風暖房機の断面図、図3は図2に示したCOセンサの収容ケースの斜視図、図4は図1に示したガス温風暖房機の制御ブロック図である。   Embodiments of the present invention will be described with reference to FIGS. 1 is a front view of the gas hot air heater, FIG. 2 is a cross-sectional view of the gas hot air heater shown in FIG. 1, FIG. 3 is a perspective view of the housing case of the CO sensor shown in FIG. It is a control block diagram of the gas warm air heater shown in FIG.

図1はガス温風暖房機1(本発明の温風暖房機に相当する)の本体ケース2の前板を取り外した状態の正面図であり、ガス温風暖房機1の背面に吸気口15が設けられ、正面に温風吹出口12が設けられている。   FIG. 1 is a front view of the gas hot air heater 1 (corresponding to the hot air heater of the present invention) with the front plate of the main body case 2 removed, and an intake port 15 on the back of the gas hot air heater 1. And a hot air outlet 12 is provided in the front.

また、ガス温風暖房機1は、ガス温風暖房機1の作動を制御する電子ユニットであるコントローラ5と、燃焼室10内に配置されたバーナ11と、吸気口15から吸入した空気を燃焼用空気としてバーナ11に供給すると共に、バーナ11の燃焼排ガスと吸気口15から吸入した空気とを混合して、温風吹出口12から送出するファン13とを備えている。   The gas warm air heater 1 combusts the controller 5 which is an electronic unit for controlling the operation of the gas warm air heater 1, the burner 11 disposed in the combustion chamber 10, and the air sucked from the intake port 15. In addition to being supplied to the burner 11 as working air, a fan 13 that mixes the combustion exhaust gas of the burner 11 and the air sucked from the intake port 15 and sends it out from the hot air outlet 12 is provided.

さらに、ガス温風暖房機1は、バーナ11の燃焼状態を検知する熱電対16と、バーナ11の不完全燃焼を検知するための電気化学式COセンサ18と、バーナ11に燃料ガスを供給するガス供給管(図示しない)を開閉する電磁弁(図示しない)と、該ガス供給管の開度を調節する比例弁(図示しない)と、バーナ11に点火するためのイグナイタ(図示しない)と、室温を検出する室温センサ(図示しない)とを備えている。   Further, the gas hot air heater 1 includes a thermocouple 16 that detects the combustion state of the burner 11, an electrochemical CO sensor 18 that detects incomplete combustion of the burner 11, and a gas that supplies fuel gas to the burner 11. A solenoid valve (not shown) for opening and closing a supply pipe (not shown), a proportional valve (not shown) for adjusting the opening of the gas supply pipe, an igniter (not shown) for igniting the burner 11, and room temperature And a room temperature sensor (not shown).

次に、図2を参照して、吸気口15には、その全面を覆うエアフィルタ20が着脱自在に装着されている。また、本体ケース2の上面の前方には、各種の操作スイッチが備えられた操作パネル21が設けられ、本体ケース2の前面の上部には、暖房運転が停止したことを報知する報知ランプ22が備えられている。   Next, referring to FIG. 2, an air filter 20 covering the entire surface of the intake port 15 is detachably mounted. Further, an operation panel 21 provided with various operation switches is provided in front of the upper surface of the main body case 2, and a notification lamp 22 is provided at the upper portion of the front surface of the main body case 2 to notify that the heating operation has stopped. Is provided.

暖房運転の実行時には、コントローラ5は、ファン13を作動させてバーナ11を燃焼させる。これにより、吸気口15から吸入されて燃焼用二次空気吸込口25から燃焼室10に供給された燃焼用二次空気と、図示しない燃焼用一次空気吸込口から吸入された燃焼用一次空気によって、燃料ガスが燃焼する。また、燃焼により生じた燃焼排ガスbは、バーナ11の上方から燃焼室10の上部を通って排出される。   When executing the heating operation, the controller 5 operates the fan 13 to burn the burner 11. Thus, the combustion secondary air sucked from the intake port 15 and supplied from the combustion secondary air suction port 25 to the combustion chamber 10 and the combustion primary air sucked from the combustion primary air suction port (not shown) are used. The fuel gas burns. Further, the combustion exhaust gas b generated by the combustion is discharged from above the burner 11 through the upper part of the combustion chamber 10.

ここで、燃焼室10の上部から排出された燃焼排ガスbと、吸気口15から吸入された空気a2が、仕切り板26と燃焼室10との間で混合される。さらに、ファン13の回転によって、吸気口15から吸入された空気の一部a3が、本体ケース2と仕切り板26の間を下方に流れて本体ケース2を冷却しながら、スリット27,28からファン13の付近に供給され、上方から流入する混合空気とさらに混合される。そして、これにより、適温となった混合空気cが温風吹出口12から室内に送出される。   Here, the combustion exhaust gas b discharged from the upper part of the combustion chamber 10 and the air a2 sucked from the intake port 15 are mixed between the partition plate 26 and the combustion chamber 10. Further, as the fan 13 rotates, a part of air a3 sucked from the air inlet 15 flows downward between the main body case 2 and the partition plate 26 and cools the main body case 2 while cooling the main body case 2 through the fans 27 and 28. 13 is supplied and mixed with the mixed air flowing in from above. As a result, the mixed air c having an appropriate temperature is sent out from the warm air outlet 12 into the room.

また、混合気cの流通路Xを形成する隔壁30に取り付けられたケース31内に、電気化学式COセンサ18が設けられ、吸気口15から吸入される室内の空気の温度を検出する室温センサ17が設けられている。   A room temperature sensor 17 for detecting the temperature of indoor air sucked from the intake port 15 is provided with an electrochemical CO sensor 18 in a case 31 attached to the partition wall 30 that forms the flow path X of the air-fuel mixture c. Is provided.

電気化学式COセンサ18が設けられた箇所と隔壁30を介して対抗する部分には、吸気口15から吸入されてスリット94を抜けてファン13に向かう空気a4が流通する。そして、この空気a4によって電気化化学式COセンサ18が設けられた箇所の付近の隔壁30及びケース31が冷却されるため、混合気cの流通による電気化学式COセンサ18の温度上昇が抑制される。   Air a <b> 4 that is sucked from the air inlet 15, passes through the slit 94, and flows toward the fan 13 flows through the portion where the electrochemical CO sensor 18 is provided and the portion that opposes the partition wall 30. The air a4 cools the partition wall 30 and the case 31 in the vicinity of the location where the electrochemical CO sensor 18 is provided, so that the temperature rise of the electrochemical CO sensor 18 due to the flow of the air-fuel mixture c is suppressed.

次に、図3を参照して、ケース31は、隔壁30に接して取り付けられる天板101と、貫通孔35(35a,35b,35c,35d)を有して混合気cの流通を減少させる緩衝板100と、側板102,103と、底板104と、混合気cを抜くための貫通孔36(36a,36b)を有する側板105とからなっている。なお、緩衝板100は本発明の流通制限手段に相当し、天板101、側板102,103,105、及び底板104は本発明の遮蔽板に相当する。   Next, referring to FIG. 3, the case 31 has a top plate 101 attached in contact with the partition wall 30 and through holes 35 (35a, 35b, 35c, 35d) to reduce the flow of the air-fuel mixture c. It comprises a buffer plate 100, side plates 102 and 103, a bottom plate 104, and a side plate 105 having a through hole 36 (36a, 36b) for removing the air-fuel mixture c. The buffer plate 100 corresponds to the flow restricting means of the present invention, and the top plate 101, the side plates 102, 103, 105, and the bottom plate 104 correspond to the shielding plate of the present invention.

ケース31内には、貫通孔35から混合気cが流入し、貫通孔35以外からケース31内への混合気cの流入は、天板101、側板102,103,105、及び底板104により妨げられる。これにより、ケース31内への混合気cの流量が制限され、混合気cの流通による電気化学式COセンサ18の温度上昇を抑制することができる。   The mixture c flows into the case 31 from the through hole 35, and the mixture c from outside the through hole 35 into the case 31 is blocked by the top plate 101, the side plates 102, 103, 105, and the bottom plate 104. It is done. Thereby, the flow rate of the air-fuel mixture c into the case 31 is limited, and the temperature increase of the electrochemical CO sensor 18 due to the flow of the air-fuel mixture c can be suppressed.

次に、図4を参照して、コントローラ5は、CPU、メモリ等により構成された電子ユニットであり、予めメモリに記憶されたプログラムを実行することにより、バーナ11の不完全燃焼を検知したときにバーナ11の燃焼を停止する強制燃焼停止手段40、暖房運転を実行する暖房制御手段41、及び報知ランプ22の作動を制御する表示制御手段42として機能する。   Next, referring to FIG. 4, the controller 5 is an electronic unit composed of a CPU, a memory, and the like, and when the incomplete combustion of the burner 11 is detected by executing a program stored in the memory in advance. Further, it functions as a forced combustion stop means 40 for stopping the combustion of the burner 11, a heating control means 41 for executing the heating operation, and a display control means 42 for controlling the operation of the notification lamp 22.

コントローラ5は、操作パネル21、熱電対16、電気化学式COセンサ18、イグナイタ60、電磁弁61、比例弁62、ファン13、室温センサ17、及び報知ランプ22と接続されている。そして、操作パネル21からコントローラ5に入力される暖房運転スイッチ50及び温度設定スイッチ51の操作信号に応じて、コントローラ5は、暖房運転を実行する。   The controller 5 is connected to the operation panel 21, thermocouple 16, electrochemical CO sensor 18, igniter 60, electromagnetic valve 61, proportional valve 62, fan 13, room temperature sensor 17, and notification lamp 22. And according to the operation signal of the heating operation switch 50 and the temperature setting switch 51 which are input to the controller 5 from the operation panel 21, the controller 5 performs the heating operation.

暖房制御手段41は、イグナイタ60、電磁弁61、比例弁62、ファン13の作動を制御して暖房運転を実行する。暖房運転において、暖房制御手段41は、温度設定スイッチ51により設定された目標温度と、室温センサ17の検出温度が一致するように、該目標温度と該検出温度との差に応じてバーナ11の燃焼量を変更する。   The heating control means 41 controls the operation of the igniter 60, the electromagnetic valve 61, the proportional valve 62, and the fan 13 to execute the heating operation. In the heating operation, the heating control means 41 adjusts the burner 11 according to the difference between the target temperature and the detected temperature so that the target temperature set by the temperature setting switch 51 matches the detected temperature of the room temperature sensor 17. Change the amount of combustion.

また、強制燃焼停止手段40は、暖房運転の実行時に熱電対16の熱起電力TCと電気化学式COセンサ18の出力電流Iecとを監視する。そして、熱電対16の熱起電力TCが基準値から所定の判定レベル以上低下したときに、バーナ11の燃焼を停止する。 The forced combustion stopping means 40 monitors the thermoelectromotive force TC of the thermocouple 16 and the output current I ec of the electrochemical CO sensor 18 during the heating operation. Then, when the thermoelectromotive force TC of the thermocouple 16 is lowered from the reference value by a predetermined determination level or more, the combustion of the burner 11 is stopped.

ここで、熱電対16の熱起電力TCは、室内の酸素の濃度の低下に応じて減少するため、熱電対16の熱起電力TCが基準値から所定の判定レベル以上低下したときに、バーナ11の燃焼を停止することにより、酸素不足によりバーナ11の不完全燃焼が生じることを防止することができる。   Here, since the thermoelectromotive force TC of the thermocouple 16 decreases with a decrease in the oxygen concentration in the room, when the thermoelectromotive force TC of the thermocouple 16 decreases from the reference value by a predetermined determination level or more, the burner By stopping the combustion of 11, it is possible to prevent incomplete combustion of the burner 11 due to insufficient oxygen.

また、強制燃焼停止手段40は、電気化学式COセンサ18の出力電流Iecが基準値を超えたときに、バーナ11の燃焼を停止する。ここで、電気化学式COセンサ18の出力電流Iecは、COの濃度の増加に応じて増加するため、電気化学式COセンサ18の出力電流Iecが基準値を超えたときにバーナ11の燃焼を停止することにより、バーナ11の不完全燃焼により燃焼排ガス中のCO濃度が増大した状況が継続されることを防止することができる。 Further, the forced combustion stopping means 40 stops the combustion of the burner 11 when the output current I ec of the electrochemical CO sensor 18 exceeds a reference value. Here, since the output current I ec of the electrochemical CO sensor 18 increases as the CO concentration increases, the burner 11 burns when the output current I ec of the electrochemical CO sensor 18 exceeds a reference value. By stopping, it is possible to prevent the situation in which the CO concentration in the combustion exhaust gas has increased due to incomplete combustion of the burner 11 from being continued.

なお、本実施の形態においては、本発明の流通制限手段として緩衝板100を有し、本発明の遮蔽板として天板101、側板102,103,105、底板104を有するケース31を備えて、ケース31内に電気化学式COセンサ18を設けたが、緩衝板100のみを設けて緩衝板100の下流側の近傍に電気化学式COセンサ18を設ける場合や、天板101、側板102,103,105、底板104のうちの一部のみを設ける場合にも本発明の効果を得ることができる。   In the present embodiment, a buffer plate 100 is provided as a flow restriction means of the present invention, and a case 31 having a top plate 101, side plates 102, 103, 105, and a bottom plate 104 is provided as a shielding plate of the present invention. Although the electrochemical CO sensor 18 is provided in the case 31, only the buffer plate 100 is provided and the electrochemical CO sensor 18 is provided in the vicinity of the downstream side of the buffer plate 100, or the top plate 101 and the side plates 102, 103, 105 are provided. Even when only a part of the bottom plate 104 is provided, the effect of the present invention can be obtained.

また、本発明の流通制限手段の構成は緩衝板100に限られず、混合気の流通を妨げるものであればよい。   Further, the configuration of the flow restricting means of the present invention is not limited to the buffer plate 100, and any configuration that prevents the flow of the air-fuel mixture may be used.

また、本実施の形態においては、吸気口15から吸入した空気を電気化学式センサ18が設けられた箇所の付近まで導入する導入路Yを備えたが、該導入路Yを備えない場合であっても本発明の効果を得ることができる。   In the present embodiment, the introduction path Y for introducing the air sucked from the intake port 15 to the vicinity of the location where the electrochemical sensor 18 is provided is provided. However, the introduction path Y is not provided. Also, the effects of the present invention can be obtained.

また、本実施の形態では、ガスバーナを備えた温風暖房機を示したが、灯油バーナ等他の燃料を用いるバーナを備えた温風暖房機に対しても本発明の適用が可能である。   Moreover, although the hot air heater provided with the gas burner was shown in this Embodiment, this invention is applicable also to the hot air heater provided with the burner using other fuels, such as a kerosene burner.

ガス温風暖房機の正面図。The front view of a gas warm air heater. 図1に示したガス温風暖房機の断面図。Sectional drawing of the gas warm air heater shown in FIG. 図2に示したCOセンサの収容ケースの斜視図。The perspective view of the storage case of the CO sensor shown in FIG. 図1に示したガス温風暖房機の制御ブロック図。The control block diagram of the gas hot air heater shown in FIG.

符号の説明Explanation of symbols

1…ガス温風暖房機、5…コントローラ、11…バーナ、13…ファン、15…吸気口、16…熱電対、17…室温センサ、18…電気化学式COセンサ、21…操作パネル、22…報知ランプ、40…強制燃焼停止手段、41…暖房制御手段、45…表示制御手段   DESCRIPTION OF SYMBOLS 1 ... Gas warm air heater, 5 ... Controller, 11 ... Burner, 13 ... Fan, 15 ... Inlet, 16 ... Thermocouple, 17 ... Room temperature sensor, 18 ... Electrochemical CO sensor, 21 ... Operation panel, 22 ... Notification Lamp: 40 ... Forced combustion stop means, 41 ... Heating control means, 45 ... Display control means

Claims (4)

バーナと、
吸気口から空気を吸入すると共に、該吸気口から吸入した空気と該バーナの燃焼排ガスとの混合気を温風吹出口から送出する送風ファンと、
前記混合気の送出経路に設けられ、前記混合気中の一酸化炭素との酸化・還元反応により、前記混合気中の一酸化炭素の濃度に比例した電流を出力する電気化学式COセンサと、
該電気化学式COセンサの出力電流に基いて、前記バーナの燃焼状態を検知する燃焼状態検知手段とを備えたことを特徴とする温風暖房機。
With a burner,
A blower fan that sucks air from the air inlet and sends out a mixture of the air sucked from the air inlet and the combustion exhaust gas of the burner from the hot air outlet;
An electrochemical CO sensor that is provided in the delivery path of the air-fuel mixture and outputs a current proportional to the concentration of carbon monoxide in the air-fuel mixture by an oxidation / reduction reaction with the carbon monoxide in the air-fuel mixture;
A hot air heater comprising combustion state detection means for detecting a combustion state of the burner based on an output current of the electrochemical CO sensor.
前記混合気の送出経路に設けられて、前記混合気の流通を妨げる流通制限手段を備え、
前記電気化学式COセンサは、該流通制限手段の下流側の近傍に設けられていることを特徴とする請求項1記載の温風暖房機。
Provided in a delivery path of the air-fuel mixture, comprising flow restricting means for preventing the air-fuel mixture from flowing;
The hot air heater according to claim 1, wherein the electrochemical CO sensor is provided in the vicinity of the downstream side of the flow restricting means.
前記流通制限手段として貫通孔を有する緩衝板を有し、
前記電気化学式COセンサの周囲に、該貫通孔以外から前記電気化学式COセンサへの前記混合気の流入を妨げるための遮蔽板を備えたことを特徴とする請求項2記載の温風暖房機。
A buffer plate having a through hole as the flow restricting means,
The hot air heater according to claim 2, further comprising a shielding plate for preventing the air-fuel mixture from flowing into the electrochemical CO sensor from other than the through-holes around the electrochemical CO sensor.
前記電気化学式COセンサは、前記混合気の送出路を形成する隔壁に取り付けられ、
前記吸気口から吸入された空気を、前記隔壁を介して前記電気化学式COセンサと対向する箇所に導入する導入路を備えたことを特徴とする請求項1から請求項3のうちいずれか1項記載の温風暖房機。
The electrochemical CO sensor is attached to a partition wall that forms a delivery path of the mixture,
4. The apparatus according to claim 1, further comprising: an introduction path that introduces air sucked from the air inlet into a portion facing the electrochemical CO sensor via the partition wall. 5. The hot air heater described.
JP2006185121A 2006-07-05 2006-07-05 Hot air heater Expired - Fee Related JP4567636B2 (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010085061A (en) * 2008-10-02 2010-04-15 Yazaki Corp Gas combustor
JP2010133580A (en) * 2008-12-02 2010-06-17 Osaka Gas Co Ltd Open type burning appliance
JP2010145282A (en) * 2008-12-19 2010-07-01 Osaka Gas Co Ltd Gas sensor for combustion equipment, and combustion equipment
JP2011127774A (en) * 2009-12-15 2011-06-30 Rinnai Corp Hot air heater
JP2013007564A (en) * 2012-10-12 2013-01-10 Osaka Gas Co Ltd Open type burning appliance
JP2016095090A (en) * 2014-11-14 2016-05-26 株式会社サムソン CO detection combustion device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61110969U (en) * 1984-12-21 1986-07-14
JPH0262255U (en) * 1988-10-25 1990-05-09
JPH0875698A (en) * 1994-09-05 1996-03-22 Matsushita Electric Ind Co Ltd Gas sensor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61110969U (en) * 1984-12-21 1986-07-14
JPH0262255U (en) * 1988-10-25 1990-05-09
JPH0875698A (en) * 1994-09-05 1996-03-22 Matsushita Electric Ind Co Ltd Gas sensor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010085061A (en) * 2008-10-02 2010-04-15 Yazaki Corp Gas combustor
JP2010133580A (en) * 2008-12-02 2010-06-17 Osaka Gas Co Ltd Open type burning appliance
JP2010145282A (en) * 2008-12-19 2010-07-01 Osaka Gas Co Ltd Gas sensor for combustion equipment, and combustion equipment
JP2011127774A (en) * 2009-12-15 2011-06-30 Rinnai Corp Hot air heater
JP2013007564A (en) * 2012-10-12 2013-01-10 Osaka Gas Co Ltd Open type burning appliance
JP2016095090A (en) * 2014-11-14 2016-05-26 株式会社サムソン CO detection combustion device

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