JP6204158B2 - Hot air heater - Google Patents

Hot air heater Download PDF

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JP6204158B2
JP6204158B2 JP2013236624A JP2013236624A JP6204158B2 JP 6204158 B2 JP6204158 B2 JP 6204158B2 JP 2013236624 A JP2013236624 A JP 2013236624A JP 2013236624 A JP2013236624 A JP 2013236624A JP 6204158 B2 JP6204158 B2 JP 6204158B2
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temperature
combustion
abnormal overheat
air
main body
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栗林　清人
清人 栗林
敬夫 野上
敬夫 野上
朋保 藤川
朋保 藤川
裕士 笠輪
裕士 笠輪
遠藤　政和
政和 遠藤
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Corona Corp
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Description

本発明は、燃焼による排気ガスと室内空気とを熱交換して暖房を行う通称ＦＦ式と言われる温風暖房機に関するものである。   The present invention relates to a hot-air heater called a so-called FF type which performs heating by exchanging heat between exhaust gas generated by combustion and room air.

従来、この種のものに於いては、流入空気量不足による器具の本体内の異常温度上昇を、本体内の温度を検知するサーミスタを用いて早期に検知し、器具の異常温度過熱を防止するものがあった。（例えば特許文献１参照）   Conventionally, in this type of device, an abnormal temperature rise in the main body of the instrument due to a shortage of inflow air is detected at an early stage using a thermistor that detects the temperature in the main body, thereby preventing abnormal temperature overheating of the instrument. There was a thing. (For example, see Patent Document 1)

また、運転スイッチのＯＦＦ操作による加熱手段の停止後も、所定時間対流ファンを動作させることで、加熱停止時に、加熱手段が収納された筐体内の温度が過剰に上昇するのを防止するポストパージを行なうものがあった。（例えば特許文献２参照）   In addition, the post-purge prevents the temperature in the housing containing the heating means from excessively rising when the heating means is stopped by operating the convection fan for a predetermined time even after the heating means is stopped by turning off the operation switch. There was something to do. (For example, see Patent Document 2)

特開平０６−１２３４２５号公報Japanese Patent Laid-Open No. 06-123425 特開平１０−３００２２９号公報JP-A-10-300229

ところで、この従来のものでは、例えば対流ファンの空気取り入れ口に設けたフィルターに徐々にほこり等が付着して流入空気量が徐々に不足して本体内の温度が上昇し、ほこり等の付着が所定のレベルに達した時点で本体内の温度が異常判定温度に達して運転が停止されるが、この場合、異常判定温度に達するまでの温度変化は緩やかに上昇し、異常判定温度に達して運転が停止された後の本体内の温度は、異常判定温度より１０〜２０℃高い温度までオーバーシュートした後に低下していくものである。   By the way, in this conventional type, for example, dust or the like gradually adheres to the filter provided at the air intake port of the convection fan, the amount of inflow air gradually decreases, the temperature in the main body rises, and dust or the like adheres. When the temperature reaches the specified level, the temperature inside the main unit reaches the abnormality judgment temperature and the operation is stopped.In this case, the temperature change until the abnormality judgment temperature is reached rises slowly and reaches the abnormality judgment temperature. The temperature in the main body after the operation is stopped decreases after overshooting to a temperature 10 to 20 ° C. higher than the abnormality determination temperature.

しかし、運転停止直後のポストパージ中に、運転スイッチをＯＮ操作して再運転させる場合、ポストパージが終了してから再運転動作を開始するのは使い勝手が悪いため、ポストパージを途中で中止して運転動作に入るが、運転停止直後に対流ファンの空気取り入れ口に洗濯物が落ちたり、温風の吹き出し口の前に物を置いたりして送風路が閉塞されている状態でポストパージ中に運転スイッチをＯＮ操作して再運転させる場合、本体内の温度が高い状態から運転を開始して急激に本体内の温度が上昇し、異常判定温度に達して運転が停止するが、運転停止された後の本体内の温度は、再運転開始時に本体内の温度が高い状態だったために異常判定温度より５０℃以上高い温度までオーバーシュートしてしまい、温風暖房機の本体表面が高温になってしまったり、本体内の部品や基板が高温により損傷したり寿命が短くなってしまう課題があった。   However, if the operation switch is turned ON and restarted during post-purge immediately after shutdown, it is not convenient to start the restart operation after post-purge is completed. However, immediately after the operation stops, the laundry is dropped at the air intake of the convection fan, or the item is placed in front of the hot air outlet and the air passage is blocked. When the operation switch is turned ON again and the operation is restarted, the operation starts from a state where the temperature inside the main body is high, the temperature inside the main body suddenly rises, reaches the abnormality judgment temperature, and the operation stops. The temperature inside the main body after being overheated to a temperature that is 50 ° C. higher than the abnormality determination temperature because the temperature inside the main body was high at the start of re-operation, and the surface of the main body of the hot air heater was hot. Is to or worse, parts or the substrate in the main body there is a problem that is damaged or the life by the high temperature is shortened.

上記課題を解決するために、本発明の請求項１では、燃焼用空気を送風する燃焼用送風機と、燃料を送る燃料供給手段と、前記燃焼用送風機からの燃焼用空気と燃料供給手段からの燃料を混合して燃焼するバーナ部と外筒とからなる燃焼部と、前記燃焼部からの燃焼ガスが熱交換パイプの中を通過する熱交換器と、屋外の空気を給気すると共に燃焼ガスを屋外に排気する給排気筒と、室内の空気を熱交換器に送風する対流用送風機と、本体内の温度を検知する異常過熱検知手段とを備え、室内から給気した空気と燃焼ガスとを熱交換器で熱交換して本体の吹き出し口から温風として吹き出し、運転停止後に対流用送風機を動作してポストパージを行うと共に、異常過熱検知手段が検知する本体温度が異常過熱判定温度以上になった時、異常過熱と判断して燃焼部を消火して運転を停止する温風暖房機に於いて、ポストパージ中に運転スイッチがＯＮ操作された時、ポストパージを中止し、前記異常過熱検知手段が検知する本体内の温度が所定温度以上の場合、異常過熱判定温度を通常より低い温度に設定して運転動作を行うものである。   In order to solve the above-mentioned problems, in claim 1 of the present invention, a combustion blower for blowing combustion air, a fuel supply means for sending fuel, a combustion air from the combustion blower and a fuel supply means Combustion unit composed of a burner unit and an outer cylinder for mixing and burning fuel, a heat exchanger in which combustion gas from the combustion unit passes through a heat exchange pipe, and supplying outdoor air and combustion gas Air supply / exhaust cylinder that exhausts the air to the outside, a convection blower that blows indoor air to the heat exchanger, and an abnormal overheat detection means that detects the temperature inside the main body. After the operation is stopped, the convection blower is operated to perform post purge, and the body temperature detected by the abnormal overheat detection means is equal to or higher than the abnormal overheat determination temperature. When it becomes In a hot air heater that extinguishes the combustion section and stops operation when the operation switch is turned ON during the post purge, the main body that stops the post purge and detects the abnormal overheat detection means When the internal temperature is equal to or higher than the predetermined temperature, the abnormal overheat determination temperature is set to a temperature lower than normal, and the operation is performed.

また、請求項２では、燃焼用空気を送風する燃焼用送風機と、燃料を送る燃料供給手段と、前記燃焼用送風機からの燃焼用空気と燃料供給手段からの燃料を混合して燃焼するバーナ部と外筒とからなる燃焼部と、前記燃焼部からの燃焼ガスが熱交換パイプの中を通過する熱交換器と、屋外の空気を給気すると共に燃焼ガスを屋外に排気する給排気筒と、室内の空気を熱交換器に送風する対流用送風機と、本体内の温度を検知する異常過熱検知手段とを備え、室内から給気した空気と燃焼ガスとを熱交換器で熱交換して本体の吹き出し口から温風として吹き出し、運転停止後に対流用送風機を動作してポストパージを行うと共に、異常過熱検知手段が検知する本体温度が異常過熱判定温度以上になった時、異常過熱と判断して燃焼部を消火して運転を停止する温風暖房機に於いて、ポストパージ中に運転スイッチがＯＮ操作された時、ポストパージを中止し、前記異常過熱検知手段が検知する本体内の温度が所定温度以上の場合、異常過熱判定温度を通常時より低い温度に所定時間設定し、所定時間経過後通常時の異常過熱判定温度に戻すものである。   According to a second aspect of the present invention, a combustion blower for blowing combustion air, a fuel supply means for sending fuel, and a burner unit for mixing and burning the combustion air from the combustion blower and the fuel from the fuel supply means A combustion section composed of an outer cylinder, a heat exchanger through which combustion gas from the combustion section passes through a heat exchange pipe, a supply / exhaust cylinder for supplying outdoor air and exhausting the combustion gas to the outdoors A convection blower that blows indoor air to the heat exchanger, and an abnormal overheat detection means that detects the temperature in the main body, and heat exchange between the air supplied from the room and the combustion gas with the heat exchanger It blows out as hot air from the outlet of the main unit, operates the convection blower after the operation is stopped, performs post purge, and when the main unit temperature detected by the abnormal overheat detection means exceeds the abnormal overheat determination temperature, it is determined as abnormal overheating. And extinguish the burning part In the hot air heater that stops rolling, when the operation switch is turned ON during the post purge, the post purge is stopped, and the temperature in the main body detected by the abnormal overheat detecting means is equal to or higher than a predetermined temperature. The abnormal overheat determination temperature is set to a temperature lower than the normal time for a predetermined time, and is returned to the normal abnormal overheat determination temperature after the predetermined time has elapsed.

また、請求項３では、請求項１又は２に於いて、ポストパージ終了後に運転スイッチがＯＮ操作された時、異常過熱判定温度をポストパージ中に運転スイッチがＯＮ操作された時に設定される通常時より低い温度よりも更に低い温度に設定し、前記異常過熱検知手段が検知する本体内の温度が異常過熱判定温度以上の場合、異常と判断して運転を行わないものである。   Further, in claim 3, in claim 1 or 2, when the operation switch is turned ON after the end of the post purge, the abnormal overheat determination temperature is normally set when the operation switch is turned ON during the post purge. If the temperature in the main body detected by the abnormal overheat detecting means is equal to or higher than the abnormal overheat determination temperature, the temperature is determined to be abnormal and the operation is not performed.

この発明の請求項１によれば、ポストパージ中に運転スイッチがＯＮ操作された時、ポストパージを中止し、前記異常過熱検知手段が検知する本体内の温度が所定温度以上の場合、異常過熱判定温度を通常より低い温度に設定して運転動作を行うので、運転停止直後に本体背面にタオルがかかったり、本体正面に物が置かれたりして送風路や前面中央の吹き出し口がほとんど又は完全に閉塞されている状態になって、更にポストパージを行っている途中で再運転を開始しても、本体内の温度が通常より低い温度に設定した異常過熱判定温度に達したら運転を停止し、それによりポストパージの途中で本体内の温度が高い状態から運転を開始して急激に本体内の温度が上昇し本体内温度が異常過熱判定温度以上になって異常過熱と判断して運転を停止した後、本体内の温度がその後も上昇してオーバーシュートしても異常高温まで本体内の温度が上昇せず、オーバーシュートにより温風暖房機の本体表面が高温になってしまったり、本体内の部品や基板が高温により損傷したり寿命が短くなるのを防止できるものである。   According to the first aspect of the present invention, when the operation switch is turned ON during the post purge, the post purge is stopped, and the abnormal overheat is detected when the temperature in the main body detected by the abnormal overheat detecting means is equal to or higher than the predetermined temperature. Since the judgment temperature is set to a lower temperature than usual, operation is performed. Even if re-operation is started in the middle of post-purge after being completely blocked, operation is stopped when the internal temperature reaches the abnormal overheat judgment temperature set to a lower temperature than normal. As a result, the operation starts from a state where the temperature inside the main body is high during the post-purge, the temperature inside the main body suddenly rises, the temperature inside the main body exceeds the abnormal overheat judgment temperature, and the operation is judged as abnormal overheating. After stopping, even if the temperature inside the main body rises and overshoots, the temperature inside the main body does not rise to an abnormally high temperature, and the main surface of the hot air heater becomes hot due to overshoot, It is possible to prevent internal components and boards from being damaged or shortened by high temperatures.

また、請求項２によれば、ポストパージ中に運転スイッチがＯＮ操作された時、ポストパージを中止し、前記異常過熱検知手段が検知する本体内の温度が所定温度以上の場合、異常過熱判定温度を通常時より低い温度に所定時間設定し、所定時間経過後通常時の異常過熱判定温度に戻すので、再運転開始時の本体内の温度のオーバーシュートによる異常過熱がなければ、そのまま運転を継続しつつ通常の異常過熱判定を行えるものである。   According to a second aspect of the present invention, when the operation switch is turned ON during the post purge, the post purge is stopped, and the abnormal overheat determination is performed when the temperature in the main body detected by the abnormal overheat detecting means is equal to or higher than a predetermined temperature. The temperature is set to a temperature lower than normal for a predetermined time, and after the predetermined time has elapsed, it returns to the normal abnormal overheat determination temperature, so if there is no abnormal overheating due to overshoot of the temperature in the main unit at the start of re-operation, operation is continued as it is. The normal abnormal overheat determination can be performed while continuing.

また、請求項３によれば、ポストパージ終了後に運転スイッチがＯＮ操作された時、異常過熱判定温度をポストパージ中に運転スイッチがＯＮ操作された時に設定される通常時より低い温度よりも更に低い温度に設定し、前記異常過熱検知手段が検知する本体内の温度が異常過熱判定温度以上の場合、異常と判断して運転を行わないので、運転停止後からポストパージ終了前までの間に、運転停止直後に本体背面にタオルがかかったり、本体正面に物が置かれたりして送風路や前面中央の吹き出し口がほとんど又は完全に閉塞されている状態になっている時、運転スイッチがＯＮ操作されても運転を行わないので、再運転開始時の本体内の温度のオーバーシュートによる異常過熱を防止できるものである。   According to the third aspect, when the operation switch is turned on after the end of the post purge, the abnormal overheat determination temperature is further set lower than the normal temperature set when the operation switch is turned on during the post purge. When the temperature in the main body detected by the abnormal overheat detecting means is equal to or higher than the abnormal overheat determination temperature, the operation is not performed because the operation is not performed. When the towel is put on the back of the main unit immediately after the operation is stopped, or when an object is placed on the front of the main unit, the air passage or the outlet in the center of the front is almost or completely blocked. Since the operation is not performed even when the operation is turned on, it is possible to prevent abnormal overheating due to an overshoot of the temperature in the main body at the start of re-operation.

この発明の一実施例を付した温風暖房機の斜視図。The perspective view of the warm air heater which attached | subjected one Example of this invention. 同断面図。FIG. 同ブロック図。The block diagram. 同運転開始時のフローチャート図。The flowchart figure at the time of the same operation start.

次にこの発明に係る温風暖房機を図面に示す一実施例で説明する。
１は温風暖房機本体で、前面中央から下部にかけて温風を吹き出す吹き出し口２を設けると共に、本体上面に運転スイッチ３や温度設定スイッチ（図示せず）等の複数のボタンを有する操作部４が設けられると共に、本体正面上部に温度や時間を表示する表示部５とが設けられ、又背面には屋外の空気を温風暖房機に給気するための給気部（図示せず）と温風暖房機の排気ガスを屋外に排気するための排気部（図示せず）とからなる給排気筒（図示せず）が接続されているものである。 Next, a hot air heater according to the present invention will be described with reference to an embodiment shown in the drawings.
Reference numeral 1 denotes a hot air heater main body, which is provided with a blowout port 2 for blowing out hot air from the front center to the lower part, and an operation unit 4 having a plurality of buttons such as an operation switch 3 and a temperature setting switch (not shown) on the upper surface of the main body. And a display unit 5 for displaying temperature and time on the front upper part of the main body, and an air supply unit (not shown) for supplying outdoor air to the hot air heater on the back surface. An air supply / exhaust cylinder (not shown) including an exhaust part (not shown) for exhausting the exhaust gas of the hot air heater to the outdoors is connected.

６は燃焼部で、燃料供給手段（図示せず）である燃料ポンプから送られてきた灯油と燃焼用送風機（図示せず）から送られてくる燃焼用空気を点火装置（図示せず）にて着火することにより燃焼をするバーナ部７と、該バーナ部７の燃焼ガスを排気ガスとして導く外筒８とからなるものである。   Reference numeral 6 denotes a combustion section, which supplies kerosene sent from a fuel pump as fuel supply means (not shown) and combustion air sent from a combustion blower (not shown) to an ignition device (not shown). The burner part 7 which combusts by igniting and the outer cylinder 8 which guide | induces the combustion gas of this burner part 7 as exhaust gas is comprised.

９は箱状の排気室で、下部に外筒８が取り付けられ、内部には外筒８から流入する排気ガスを迂回させて通過させるための迂回板（図示せず）を設けたものであり、又その上面には中心部分から端にむかって低くなるような傾斜部１０が、中心部分から温風暖房機本体１の前面方向と中心部分から温風暖房機本体１の背面方向に設けられているものである。   Reference numeral 9 denotes a box-shaped exhaust chamber, which has an outer cylinder 8 attached to the lower part thereof, and is provided with a bypass plate (not shown) for bypassing exhaust gas flowing from the outer cylinder 8 inside. In addition, an inclined portion 10 is formed on the upper surface so as to be lowered from the center portion toward the end, from the center portion toward the front surface of the hot air heater body 1 and from the center portion toward the back surface of the hot air heater body 1. It is what.

１１は熱交換器で、排気室９の上方に設けられ、排気室９からの排気ガスが流入する箱状の流入部１２と、略パイプ状で一端が流入部１２に接続され、流入部１２からの排気ガスが内部を通過する複数の熱交換パイプ１３と、該熱交換パイプ１３の他端が接続されると共に屋外と連通している給排気筒（図示せず）の排気部（図示せず）と接続され、熱交換パイプ１３内を通過した排気ガスを排気部に案内する箱状の流出部（図示せず）とからなるものである。   A heat exchanger 11 is provided above the exhaust chamber 9, and has a box-like inflow portion 12 into which exhaust gas from the exhaust chamber 9 flows, and a substantially pipe-like end connected to the inflow portion 12. A plurality of heat exchange pipes 13 through which exhaust gas from the interior passes, and an exhaust section (not shown) of a supply / exhaust cylinder (not shown) connected to the other end and connected to the other end of the heat exchange pipe 13 And a box-shaped outflow part (not shown) for guiding the exhaust gas that has passed through the heat exchange pipe 13 to the exhaust part.

１４はプロペラファンからなる対流用送風機で、熱交換器１１の後方に設けられ、対流用モータ１５により駆動されることにより、室内の空気を吸い込んで下方向に送風するものである。   Reference numeral 14 denotes a convection blower made of a propeller fan, which is provided behind the heat exchanger 11 and is driven by a convection motor 15 to suck indoor air and blow it downward.

１６はサーミスタからなる異常過熱検知手段で、熱交換器１１の上方に設けられた遮熱板１７に取り付けられ、この遮熱板１７の温度を検知することで本体内の温度を検知するものである。   Reference numeral 16 denotes an abnormal overheat detecting means comprising a thermistor, which is attached to a heat shield plate 17 provided above the heat exchanger 11 and detects the temperature inside the main body by detecting the temperature of the heat shield plate 17. is there.

１８は制御部で、室内温度が設定温度になるように温風暖房運転を制御するものである。
１９はタイマーで、制御部１８からの計時開始信号及び計時停止信号により時間を計時するものである。 A control unit 18 controls the hot air heating operation so that the room temperature becomes the set temperature.
Reference numeral 19 denotes a timer, which measures time based on a timing start signal and a timing stop signal from the control unit 18.

次に本発明一実施例の動作について説明する。
まず内蔵されているヒータ（図示せず）に通電してバーナ部７が所定の温度に上昇すると、燃料ポンプから灯油がバーナ部７に送られて気化し、又バーナ部７に燃焼用送風機から燃焼用空気が送られ、気化した灯油と燃焼用空気が混合され、点火装置（図示せず）により着火されて燃焼を開始する。 Next, the operation of one embodiment of the present invention will be described.
First, when a built-in heater (not shown) is energized and the burner unit 7 rises to a predetermined temperature, kerosene is sent from the fuel pump to the burner unit 7 and vaporized, and the burner unit 7 is supplied with a combustion blower. Combustion air is sent, and the vaporized kerosene and combustion air are mixed and ignited by an ignition device (not shown) to start combustion.

燃焼ガスは排気ガスとしてバーナ部７から外筒８内を通過して上昇し、排気室９内の迂回板に案内されて排気室９内を迂回して通過し、熱交換器１１の流入部１２から熱交換パイプ１３内を通過し、流出部から給排気筒の排気部へと流れて屋外に排気されていくものである。   Combustion gas as exhaust gas passes through the outer cylinder 8 from the burner portion 7 and rises, is guided by a bypass plate in the exhaust chamber 9 and bypasses the exhaust chamber 9, and flows into the inflow portion of the heat exchanger 11. 12 passes through the heat exchange pipe 13, flows from the outflow part to the exhaust part of the supply / exhaust cylinder, and is exhausted to the outdoors.

又バーナ部７で燃焼が開始されると、熱交換器１１後方に位置する対流用送風機１４が駆動されて、室内の空気を温風暖房機本体１内に給気し、その給気された室内の空気は、対流用送風機１４から前方に送風され、熱交換器１１の熱交換パイプ１３の外周を通過して熱交換して加熱された後、温風暖房機本体１前面の吹き出し口２から室内に温風として吹き出すものである。   When combustion is started in the burner unit 7, the convection blower 14 located behind the heat exchanger 11 is driven to supply indoor air into the hot air heater body 1 and the air is supplied. The indoor air is blown forward from the convection blower 14, passes through the outer periphery of the heat exchange pipe 13 of the heat exchanger 11, is heated by heat exchange, and then the outlet 2 on the front surface of the hot air heater body 1. It blows out as warm air into the room.

次に再運転開始時の制御について図４に示したフローチャート図にて説明する。
まず制御部１８はポストパージが開始されたか否かを判定し（Ｓ１）、次にポストパージが終了されたか否かを判定する。（Ｓ２） Next, the control at the start of re-operation will be described with reference to the flowchart shown in FIG.
First, the control unit 18 determines whether or not the post purge is started (S1), and then determines whether or not the post purge is ended. (S2)

（Ｓ２）でポストパージが終了されていない時、制御部１８は運転スイッチ３がＯＮ操作されたか否かを判定し（Ｓ３）、運転スイッチ３がＯＮ操作されていない場合は（Ｓ２）へ戻り、運転スイッチ３がＯＮ操作された場合は異常過熱判定温度を低温の１００℃に設定して（Ｓ４）、暖房運転を開始すると共に（Ｓ５）、タイマー１９による計時を開始する。（Ｓ６）   When the post purge is not finished in (S2), the control unit 18 determines whether or not the operation switch 3 is turned on (S3). If the operation switch 3 is not turned on, the control unit 18 returns to (S2). When the operation switch 3 is turned ON, the abnormal overheat determination temperature is set to a low temperature of 100 ° C. (S4), the heating operation is started (S5), and the time measurement by the timer 19 is started. (S6)

そして、次に制御部１８は、異常過熱検知手段１６で検知する本体内温度が、（Ｓ４）で設定した異常過熱判定温度の１００℃以上か否かを判定し（Ｓ７）、異常過熱検知手段１６で検知する本体内温度が１００℃以上になると、異常過熱と判断して（Ｓ８）、運転を停止して（Ｓ９）、タイマー１９による計時を終了し（Ｓ１０）、表示部５に異常表示をするものである。（Ｓ１１）   Then, the control unit 18 determines whether or not the internal temperature detected by the abnormal overheat detection means 16 is 100 ° C. or more of the abnormal overheat determination temperature set in (S4) (S7), and abnormal overheat detection means When the internal temperature detected in 16 becomes 100 ° C. or more, it is determined that the overheating is abnormal (S8), the operation is stopped (S9), the time counting by the timer 19 is ended (S10), and an abnormal display is displayed on the display unit 5. It is something to do. (S11)

又、（Ｓ７）で、異常過熱検知手段１６で検知する本体内温度が１００℃未満の場合、タイマー１９による計時が所定時間、本実施例では６分間を経過したかを判定し（Ｓ１２）、タイマー１９による計時が所定時間を経過していない時は（Ｓ７）へ戻り、タイマー１９による計時が所定時間を経過した時は、タイマー１９による計時を停止し（Ｓ１３）、異常過熱判定温度を通常の１１５℃に設定して（Ｓ１４）、（Ｓ１８）に進むものである。   Further, in (S7), when the temperature inside the main body detected by the abnormal overheat detecting means 16 is less than 100 ° C., it is determined whether the time measured by the timer 19 has passed a predetermined time, in this embodiment, 6 minutes (S12), When the time measured by the timer 19 has not passed the predetermined time, the process returns to (S7). When the time measured by the timer 19 has passed the predetermined time, the time measured by the timer 19 is stopped (S13), and the abnormal overheat determination temperature is normally set. Is set to 115 ° C. (S14), and the process proceeds to (S18).

又、（Ｓ２）でポストパージが終了している場合、完全に運転停止状態となり（Ｓ１５）、次に制御部１８は、運転スイッチ３がＯＮ操作されたか否かを判定し（Ｓ１６）、運転スイッチ３がＯＮ操作されていない場合は（Ｓ１５）へ戻り、運転スイッチ３がＯＮ操作された場合は異常過熱判定温度を最も低温の８０℃に設定するものである。（Ｓ１７）   If the post purge is finished in (S2), the operation is completely stopped (S15). Next, the control unit 18 determines whether or not the operation switch 3 is turned on (S16). When the switch 3 is not turned on, the process returns to (S15), and when the operation switch 3 is turned on, the abnormal overheat determination temperature is set to the lowest temperature of 80 ° C. (S17)

これは通常の状態でポストパージが終了した場合、本体内の温度は５０℃以下になるが、ポストパージが終了した時点でその温度よりも高い温度、本実施例では８０℃以上であった時、明らかに異常状態と判断するものである。   When the post purge is completed in a normal state, the temperature inside the main body is 50 ° C. or lower, but when the post purge is completed, the temperature is higher than that temperature, in this embodiment, 80 ° C. or higher. It is clearly judged as an abnormal state.

そして、（Ｓ１７）で異常過熱判定温度を最も低温の８０℃に設定した後、制御部１８は、異常過熱検知手段１６で検知する本体内温度が、（Ｓ１７）で設定した異常過熱判定温度の８０℃以上か否かを判定し（Ｓ１８）、異常過熱検知手段１６で検知する本体内温度が８０℃以上の時、異常と判断して（Ｓ１９）、運転を停止して（Ｓ２０）、（Ｓ１１）に戻るものである。   Then, after setting the abnormal overheat determination temperature to the lowest temperature of 80 ° C. in (S17), the controller 18 detects that the temperature inside the main body detected by the abnormal overheat detection means 16 is equal to the abnormal overheat determination temperature set in (S17). It is determined whether or not the temperature is 80 ° C. or higher (S18). When the temperature inside the main body detected by the abnormal overheat detecting means 16 is 80 ° C. or higher, it is determined that there is an abnormality (S19), the operation is stopped (S20), Return to S11).

又、（Ｓ１８）で異常過熱検知手段１６で検知する本体内温度が、（Ｓ１７）で設定した異常過熱判定温度の８０℃未満の場合、暖房運転を開始して（Ｓ２１）、（Ｓ１４）に戻るものである。   If the temperature inside the main body detected by the abnormal overheat detecting means 16 in (S18) is less than 80 ° C. of the abnormal overheat determination temperature set in (S17), the heating operation is started (S21) and (S14). It is a return.

これにより、運転停止直後に本体背面にタオルがかかったり、本体正面に物が置かれたりして送風路や前面中央の吹き出し口２がほとんど又は完全に閉塞されている状態になって更にポストパージを行っている途中で再運転を開始しても、本体内の温度が通常より低い温度に設定した異常過熱判定温度に達したら運転を停止し、それによりポストパージの途中で本体内の温度が高い状態から運転を開始して急激に本体内の温度が上昇し本体内温度が異常過熱判定温度以上になって異常過熱と判断して運転を停止した後、本体内の温度がその後も上昇してオーバーシュートしても異常高温まで本体内の温度が上昇せず、オーバーシュートにより温風暖房機の本体表面が高温になってしまったり、本体内の部品や基板が高温により損傷したり寿命が短くなるのを防止できるものである。   As a result, a towel is put on the back of the main unit immediately after the operation is stopped, or an object is placed on the front of the main unit, so that the air passage 2 and the outlet 2 at the center of the front surface are almost or completely blocked. Even if re-operation is started during the operation, the operation is stopped when the temperature inside the main unit reaches the abnormal overheat judgment temperature set to a lower temperature than normal, so that the temperature inside the main unit After starting operation from a high state, the temperature inside the main body suddenly rises, the main body temperature rises above the abnormal overheat detection temperature, and it is judged as abnormal overheat. Even if overshooting, the temperature inside the main unit will not rise to an abnormally high temperature, and the main surface of the hot air heater will become hot due to overshooting, the components and the board inside the main unit may be damaged due to high temperature, or the service life Those that can prevent the shortened.

又、ポストパージ中に運転スイッチ３がＯＮ操作された時、ポストパージを中止し、前記異常過熱検知手段１６が検知する本体内の温度が所定温度以上の場合、異常過熱判定温度を通常時より低い温度に所定時間設定し、所定時間経過後通常時の異常過熱判定温度に戻すので、再運転開始時の本体内の温度のオーバーシュートによる異常過熱がなければ、そのまま運転を継続しつつ通常の異常過熱判定を行えるものである。   Further, when the operation switch 3 is turned ON during the post purge, when the post purge is stopped and the temperature inside the main body detected by the abnormal overheat detecting means 16 is equal to or higher than a predetermined temperature, the abnormal overheat determination temperature is set to the normal temperature. Since the temperature is set to a low temperature for a predetermined time and returned to the normal abnormal overheat determination temperature after the predetermined time has elapsed, if there is no abnormal overheating due to overshoot of the temperature in the main unit at the start of re-operation, Abnormal overheat judgment can be made.

又、ポストパージ終了後に運転スイッチ３がＯＮ操作された時、異常過熱判定温度をポストパージ中に運転スイッチ３がＯＮ操作された時に設定される通常時より低い温度よりも更に低い温度に設定し、前記異常過熱検知手段１６が検知する本体内の温度が異常過熱判定温度以上の場合、異常と判断して運転を行わないので、運転停止後からポストパージ終了前までの間に、運転停止直後に本体背面にタオルがかかったり、本体正面に物が置かれたりして送風路や前面中央の吹き出し口２がほとんど又は完全に閉塞されている状態になっている時、運転スイッチ３がＯＮ操作されても運転を行わないので、再運転開始時の本体内の温度のオーバーシュートによる異常過熱を防止できるものである。   When the operation switch 3 is turned on after the end of the post purge, the abnormal overheat determination temperature is set to a temperature lower than the normal temperature set when the operation switch 3 is turned on during the post purge. When the temperature inside the main body detected by the abnormal overheat detecting means 16 is equal to or higher than the abnormal overheat determination temperature, the operation is not performed because it is determined to be abnormal. The operation switch 3 is turned on when a towel is put on the back of the main body or an object is placed on the front of the main body so that the air duct 2 or the outlet 2 in the center of the front surface is almost completely closed. In this case, since the operation is not performed, abnormal overheating due to an overshoot of the temperature in the main body at the start of re-operation can be prevented.

２ 吹き出し口
３ 運転スイッチ
６ 燃焼部
７ バーナ部
８ 外筒
１１ 熱交換器
１３ 熱交換パイプ
１４ 対流用送風機
１６ 異常過熱検知手段 2 Outlet 3 Operation switch 6 Combustion section 7 Burner section 8 Outer cylinder 11 Heat exchanger 13 Heat exchange pipe 14 Convection blower 16 Abnormal overheat detection means

Claims (3)

燃焼用空気を送風する燃焼用送風機と、燃料を送る燃料供給手段と、前記燃焼用送風機からの燃焼用空気と燃料供給手段からの燃料を混合して燃焼するバーナ部と外筒とからなる燃焼部と、前記燃焼部からの燃焼ガスが熱交換パイプの中を通過する熱交換器と、屋外の空気を給気すると共に燃焼ガスを屋外に排気する給排気筒と、室内の空気を熱交換器に送風する対流用送風機と、本体内の温度を検知する異常過熱検知手段とを備え、室内から給気した空気と燃焼ガスとを熱交換器で熱交換して本体の吹き出し口から温風として吹き出し、運転停止後に対流用送風機を動作してポストパージを行うと共に、異常過熱検知手段が検知する本体温度が異常過熱判定温度以上になった時、異常過熱と判断して燃焼部を消火して運転を停止する温風暖房機に於いて、ポストパージ中に運転スイッチがＯＮ操作された時、ポストパージを中止し、前記異常過熱検知手段が検知する本体内の温度が所定温度以上の場合、異常過熱判定温度を通常より低い温度に設定して運転動作を行うことを特徴とする温風暖房機。   Combustion consisting of a combustion blower for blowing combustion air, a fuel supply means for sending fuel, a burner section and an outer cylinder for mixing and burning combustion air from the combustion blower and fuel from the fuel supply means A heat exchanger through which the combustion gas from the combustion section passes through a heat exchange pipe, a supply / exhaust cylinder for supplying outdoor air and exhausting the combustion gas to the outdoors, and heat exchange between indoor air A convection blower that blows air to the chamber and an abnormal overheat detection means that detects the temperature inside the main body, heat exchange between the air supplied from the room and the combustion gas with a heat exchanger, and warm air from the outlet of the main body After the operation is stopped, the convection blower is operated to perform post purge, and when the body temperature detected by the abnormal overheat detection means exceeds the abnormal overheat determination temperature, it is determined as abnormal overheat and the combustion section is extinguished. To stop operation In the machine, when the operation switch is turned ON during post-purge, post-purge is stopped, and if the temperature inside the main body detected by the abnormal overheat detecting means is higher than a predetermined temperature, the abnormal overheat determination temperature is set to be higher than normal. A warm air heater characterized by operating at a low temperature. 燃焼用空気を送風する燃焼用送風機と、燃料を送る燃料供給手段と、前記燃焼用送風機からの燃焼用空気と燃料供給手段からの燃料を混合して燃焼するバーナ部と外筒とからなる燃焼部と、前記燃焼部からの燃焼ガスが熱交換パイプの中を通過する熱交換器と、屋外の空気を給気すると共に燃焼ガスを屋外に排気する給排気筒と、室内の空気を熱交換器に送風する対流用送風機と、本体内の温度を検知する異常過熱検知手段とを備え、室内から給気した空気と燃焼ガスとを熱交換器で熱交換して本体の吹き出し口から温風として吹き出し、運転停止後に対流用送風機を動作してポストパージを行うと共に、異常過熱検知手段が検知する本体温度が異常過熱判定温度以上になった時、異常過熱と判断して燃焼部を消火して運転を停止する温風暖房機に於いて、ポストパージ中に運転スイッチがＯＮ操作された時、ポストパージを中止し、前記異常過熱検知手段が検知する本体内の温度が所定温度以上の場合、異常過熱判定温度を通常時より低い温度に所定時間設定し、所定時間経過後通常時の異常過熱判定温度に戻すことを特徴とする温風暖房機。   Combustion consisting of a combustion blower for blowing combustion air, a fuel supply means for sending fuel, a burner section and an outer cylinder for mixing and burning combustion air from the combustion blower and fuel from the fuel supply means A heat exchanger through which the combustion gas from the combustion section passes through a heat exchange pipe, a supply / exhaust cylinder for supplying outdoor air and exhausting the combustion gas to the outdoors, and heat exchange between indoor air A convection blower that blows air to the chamber and an abnormal overheat detection means that detects the temperature inside the main body, heat exchange between the air supplied from the room and the combustion gas with a heat exchanger, and warm air from the outlet of the main body After the operation is stopped, the convection blower is operated to perform post purge, and when the body temperature detected by the abnormal overheat detection means exceeds the abnormal overheat determination temperature, it is determined as abnormal overheat and the combustion section is extinguished. To stop operation In the machine, when the operation switch is turned ON during post-purge, post-purge is stopped, and when the temperature inside the body detected by the abnormal overheat detection means is higher than the predetermined temperature, the abnormal overheat judgment temperature is set to normal A warm air heater characterized in that it is set to a lower temperature for a predetermined time, and is returned to a normal abnormal overheat determination temperature after the predetermined time has elapsed. ポストパージ終了後に運転スイッチがＯＮ操作された時、異常過熱判定温度をポストパージ中に運転スイッチがＯＮ操作された時に設定される通常時より低い温度よりも更に低い温度に設定し、前記異常過熱検知手段が検知する本体内の温度が異常過熱判定温度以上の場合、異常と判断して運転を行わないことを特徴とする請求項１又は２記載の温風暖房機。   When the operation switch is turned on after the end of the post purge, the abnormal overheat judgment temperature is set to a temperature lower than the normal temperature set when the operation switch is turned on during the post purge, and the abnormal overheat The warm air heater according to claim 1 or 2, wherein when the temperature in the main body detected by the detection means is equal to or higher than the abnormal overheat determination temperature, the operation is determined to be abnormal and the operation is not performed.
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