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JP3671780B2 - Control method for water heater - Google Patents
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JP3671780B2 - Control method for water heater - Google Patents

Control method for water heater Download PDF

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Publication number
JP3671780B2
JP3671780B2 JP34741599A JP34741599A JP3671780B2 JP 3671780 B2 JP3671780 B2 JP 3671780B2 JP 34741599 A JP34741599 A JP 34741599A JP 34741599 A JP34741599 A JP 34741599A JP 3671780 B2 JP3671780 B2 JP 3671780B2
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JP
Japan
Prior art keywords
hot water
valve
heat exchanger
water supply
stop valve
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 - Lifetime
Application number
JP34741599A
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Japanese (ja)
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JP2001165503A (en
Inventor
敦弘 森下
朝尋 国中
和宏 木村
正光 石角
篤弥 山本
英典 本岡
和城 山口
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Noritz Corp
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Noritz Corp
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Description

【0001】
【発明の属する技術分野】
本発明は給湯装置の制御方法に関する。特に、給湯自動止水型の給湯装置の制御方法に関する。
【0002】
【従来の技術】
給湯自動止水型(オートストップ型)の給湯装置の構造を図1に示す。この給湯装置1にあっては、缶体2の下部にガスバーナー3を設けている。ガスバーナー3には、ガス電磁弁5及びガス比例弁6を通ってガス供給管4からガスが供給され、ガス比例弁6により制御された燃焼力でガスが燃焼される。缶体2の下面にはガスバーナー3に空気を強制的に供給してガスを最適な空燃比で燃焼させるための送風機7が設けられており、缶体2の上面にはガスバーナー3で燃焼した排ガスを排出するための排気口8が設けられている。なお、14はガスバーナー3の燃焼状態を検知するためのフレームロッドである。
【0003】
また、缶体2内部において、ガスバーナー3の上方には、熱交換器9が配設されており、熱交換器9の入水口には、上水道からの水を供給するための入水管10が接続されており、熱交換器9の出湯口には、熱交換器9で加熱された湯を出湯するための出湯管11が接続されている。入水管10には水量センサ12及び入水温度センサ13が設けられている。出湯管11には缶体温度センサ15、給湯止水弁16、出湯温度センサ17及び圧力安全弁(圧力逃がし弁)18が設けられており、入水管10の水量センサ12よりも上流側からはバイパス流量調整弁20を備えたバイパス管19が分岐し、バイパス管19の下流端は出湯管11の缶体温度センサ15及び給湯止水弁16の中間に接続されている。また、出湯管11の端末には、浴室のカラン22が設けられている。
【0004】
ここで、給湯止水弁16は、止水機能付きの過流出防止サーボ弁である。また、圧力安全弁18は、給湯止水弁16の損傷を防止するため、給湯止水弁16の下流側に設けられている。つまり、出湯管11の先に設けられた湯水混合栓(図示せず)から水が逆流してきたとき、給湯止水弁16が閉じていると、逆流して来た水の圧力による衝撃(ウォーターハンマー)が給湯止水弁16に加わって給湯止水弁16が損傷する恐れがある。そのため、圧力安全弁18を給湯止水弁16の下流側に設け、このような水圧による衝撃が出湯管11に伝わってきた場合には、その衝撃を圧力安全弁18から逃がすようにしている。
【0005】
また、給湯止水弁16を熱交換器9よりも上流側に設けて流量を絞ると、熱交換器9における水圧が低くなって湯の沸騰点が低下するので、給湯止水弁16は熱交換器9よりも下流側に設けられている。
【0006】
【発明が解決しようとする課題】
上記のような給湯自動止水型の給湯装置によれば、上記カラン22から浴槽内に一定量の湯を自動給湯することできる。すなわち、浴槽の上でカラン22を開きカラン22から浴槽内に湯を落とし込むと、水量センサによって浴槽への湯の落とし込み量が監視され、浴槽への湯の落とし込み量が設定湯量に達すると、出湯管11の給湯止水弁16によって自動的に止水され、湯の落とし込みが停止させられる。
【0007】
このとき、従来にあっては、まず出湯管11の給湯止水弁16が閉じ、ついでガス電磁弁5が閉じてガスバーナー3の燃焼が停止するようになっていた。
【0008】
そのため、給湯止水弁16が閉じられ、市水と入水管10の間に設けられている逆止弁21と給湯止水弁16との間に閉じ込められた水が熱交換器9内で後沸きすると、圧力安全弁18も給湯止水弁16よりも下流側に設けられているために熱交換器9内の圧力の逃げ場がなく、内部圧力が上昇するという問題があった。
【0009】
本発明は上述の技術的問題点を解決するためになされたものであり、その目的とするところは、締切りタイプの過流出防止サーボ弁等の給湯止水弁の下流側に圧力安全弁が設けられた自動給湯及び給湯自動止水の機能を備えた給湯装置において、後沸きによる内部圧力の上昇を発生させることなく燃焼を停止させることにある。
【0016】
【発明の開示】
請求項に記載の給湯装置の制御方法は、熱交換器の下流側に止水弁を設け、さらに該止水弁の下流側に圧力安全弁を設け、浴槽への湯の落とし込み時に設定量の湯が落とし込まれたら湯を自動止水するようにした給湯装置の制御方法において、給湯自動止水を行なう際には、燃焼運転を停止し、該燃焼運転が停止して熱交換器温度が所定温度以下になった後に止水弁を閉止することを特徴としている。
【0017】
請求項に記載した給湯装置の制御方法にあっては、例えば浴槽内に一定水量の湯を自動給湯(落とし込み)して一定水量の湯が張られたことが検知されて給湯自動止水を行なう時には、燃焼運転を停止して熱交換器温度が所定温度以下になってから止水弁を閉じるようにしているので、後沸きによって熱交換器内の内部圧力が高くなることがない。
【0018】
請求項に記載の給湯装置の制御方法は、熱交換器の下流側に止水弁を設け、さらに該止水弁の下流側に圧力安全弁を設け、浴槽への湯の落とし込み時に設定量の湯が落とし込まれたら湯を自動止水するようにした給湯装置の制御方法において、給湯自動止水を行なう際には、燃焼運転を停止し、該燃焼運転が停止してから熱交換器温度が所定温度以上低下した後に止水弁を閉止することを特徴としている。
【0019】
請求項に記載した給湯装置の制御方法にあっては、給湯自動止水時には燃焼運転を停止してから熱交換器温度が所定温度以上低下したことを確認した後に止水弁を閉じるようにしているので、後沸きによって熱交換器内の内部圧力が高くなることがない。
【0020】
【発明の実施の形態】
(第1の実施形態)
以下、本発明の一実施形態による給湯装置1の燃焼停止時の制御方法を説明する。この給湯装置1の構成は、図1に示したものと同じであるので、図示を省略し、図1の符号を引用して説明する(第2の実施形態以下も同様)。まず、第1の実施形態における燃焼停止時の制御方法を図2に示す。ステップS1は、カラン22を開いて浴槽(図示せず)内へ湯張り(自動給湯)している状態を表わしている。この湯張り動作中では、バイパス流量調整弁20を閉じると共に給湯止水弁16が開かれており、ガスバーナー3でガスが燃焼されていて入水管10から流入した水は熱交換器9で加熱されて出湯管11からバスアダプターへ供給されている。
【0021】
給湯装置1は、湯張りを継続しながら水量センサ12により浴槽に落とし込まれる湯の水量(積算流量)を計測しており(ステップS2)、この水量が設定湯量に達すると、ガス電磁弁5にオフ信号を出力して閉弁し(ステップS3)、フレームロッド14によってガスバーナー3の燃焼状態を監視する(ステップS4)。
【0022】
フレームロッド14がオフになってガスバーナー3の燃焼停止が確認されると、給湯装置1のコントローラ内に内蔵されているタイマ機能により、燃焼停止時からの経過時間をカウントし(ステップS5)、所定時間が経過すると給湯止水弁16を全閉にする(ステップS6)。
【0023】
したがって、ガス電磁弁5をオフにしてから、余熱によって熱交換器9に流れる湯が加熱されて後沸きが生じても出湯管11内の湯は、なお所定時間が経過するまでは給湯止水弁16を通って流れ出るので、後沸きによって出湯管11内の内部圧力が高くなることがない。
【0024】
また、給湯止水弁16の下流側には圧力安全弁18が設けられているので、燃焼停止後に給湯止水弁16が開いていて水圧による衝撃(ウォーターハンマー)が熱交換器9に伝わる恐れはない。
【0025】
(第2の実施形態)
図3は本発明の第2の実施形態による給湯装置1の燃焼停止時の制御方法を示している。この実施形態では、浴槽への湯張りが行なわれ(ステップS1)、落とし込み湯量が設定湯量に達すると(ステップS2)、ガス電磁弁5が閉じられる(ステップS3)。
【0026】
ついで、フレームロッド14がオフになって(ステップS4)ガスバーナー3の燃焼停止が確認されると、水量センサ12によって燃焼停止時からの通過流量が計測され(ステップS7)、通過流量の積算値が所定流量に達すると給湯止水弁16を全閉にする(ステップS6)。
【0027】
したがって、ガス電磁弁5をオフにしてから、余熱によって熱交換器9に流れる湯が加熱されて後沸きが生じても出湯管11内の湯は、なお所定流量が流れるまでは給湯止水弁16が閉じられないので、後沸きによって出湯管11内の内部圧力が高くなることがない。
【0028】
(第3の実施形態)
図4は本発明の第3の実施形態による給湯装置1の燃焼停止時の制御方法を示している。この実施形態では、浴槽への湯張りが行なわれ(ステップS1)、落とし込み湯量が設定湯量に達すると(ステップS2)、ガス電磁弁5が閉じられる(ステップS3)。
【0029】
ついで、フレームロッド14がオフになって(ステップS4)ガスバーナー3の燃焼停止が確認されると、缶体温度センサ15によって缶体温度(熱交換器温度)が計測され(ステップS7)、缶体出湯温度が所定温度以下になったら給湯止水弁16を全閉にする(ステップS6)。
【0030】
したがって、ガス電磁弁5をオフにしてから、余熱によって熱交換器9に流れる湯が加熱されて後沸きが生じても出湯管11内の湯は、缶体温度が所定温度以下に下がるまでは給湯止水弁16が閉じられないので、後沸きによって出湯管11内の内部圧力が高くなることがない。
【0031】
(第4の実施形態)
図5は本発明の第4の実施形態による給湯装置1の燃焼停止時の制御方法を示している。この実施形態では、浴槽への湯張りが行なわれ(ステップS1)、落とし込み湯量が設定湯量に達すると(ステップS2)、ガス電磁弁5が閉じられる(ステップS3)。
【0032】
ついで、フレームロッド14がオフになって(ステップS4)ガスバーナー3の燃焼停止が確認されると、缶体温度センサ15によって缶体温度が監視され(ステップS9)、燃焼停止時からの温度低下量が所定温度以上になると給湯止水弁16を全閉にする(ステップS6)。
【0033】
したがって、ガス電磁弁5をオフにしてから、余熱によって熱交換器9に流れる湯が加熱されて後沸きが生じても出湯管11内の湯は、缶体温度が所定温度以上低下するまでは給湯止水弁16が閉じられないので、後沸きによって出湯管11内の内部圧力が高くなることがない。
【0034】
なお、上記実施形態においては、フレームロッドがオフになるのを確認してから、所定時間の経過、所定流量、所定温度以下の缶体温度、所定温度以上の缶体温度の低下などを検出するようにしているが、いずれもステップS4を省略し、ステップS3でガス電磁弁を閉じた後、直ちにこれらの処理を行なってもよい。
【0035】
また、例えば第1の実施形態におけるステップS5を省略し、フレームロッドのオフによって燃焼停止を確認した後、直ちに給湯止水弁を閉じるようにしてもよい。
【0036】
【発明の効果】
本発明によれば、給湯自動止水時における熱交換器における後沸きによる内部圧力の上昇を防止することができる。
【図面の簡単な説明】
【図1】給湯自動止水型の給湯装置の構成を示す図である。
【図2】本発明の一実施形態による燃焼停止時の制御方法を表わしたフロー図である。
【図3】本発明の別な実施形態による燃焼停止時の制御方法を表わしたフロー図である。
【図4】本発明のさらに別な実施形態による燃焼停止時の制御方法を表わしたフロー図である。
【図5】本発明のさらに別な実施形態による燃焼停止時の制御方法を表わしたフロー図である。
【符号の説明】
3 ガスバーナー
9 熱交換器
10 入水路
11 出湯路
12 水量センサ
14 フレームロッド
15 缶体温度センサ
16 給湯止水弁
18 圧力安全弁
22 カラン
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for controlling a hot water supply apparatus. In particular, the present invention relates to a method for controlling a hot water supply automatic water stop type hot water supply apparatus.
[0002]
[Prior art]
The structure of a hot water supply automatic water stop type (auto stop type) hot water supply apparatus is shown in FIG. In the hot water supply device 1, a gas burner 3 is provided at the lower portion of the can body 2. Gas is supplied to the gas burner 3 from the gas supply pipe 4 through the gas electromagnetic valve 5 and the gas proportional valve 6, and the gas is combusted with the combustion force controlled by the gas proportional valve 6. A blower 7 is provided on the lower surface of the can body 2 to forcibly supply air to the gas burner 3 to burn the gas at an optimal air-fuel ratio. The upper surface of the can body 2 is combusted by the gas burner 3. An exhaust port 8 is provided for discharging the exhaust gas. Reference numeral 14 denotes a frame rod for detecting the combustion state of the gas burner 3.
[0003]
In addition, a heat exchanger 9 is disposed above the gas burner 3 inside the can body 2, and a water inlet pipe 10 for supplying water from the water supply is provided at the water inlet of the heat exchanger 9. The hot water outlet 11 of the heat exchanger 9 is connected to a hot water outlet of the heat exchanger 9 for hot water heated by the heat exchanger 9. The water inlet pipe 10 is provided with a water amount sensor 12 and a water inlet temperature sensor 13. The hot water discharge pipe 11 is provided with a can body temperature sensor 15, a hot water shutoff valve 16, a hot water temperature sensor 17, and a pressure safety valve (pressure relief valve) 18, and is bypassed from the upstream side of the water amount sensor 12 of the water intake pipe 10. A bypass pipe 19 provided with a flow rate adjusting valve 20 branches, and a downstream end of the bypass pipe 19 is connected between the can body temperature sensor 15 and the hot water stop valve 16 of the hot water discharge pipe 11. Further, a bathroom currant 22 is provided at the terminal of the hot water pipe 11.
[0004]
Here, the hot water stop valve 16 is an overflow prevention servo valve with a water stop function. Further, the pressure safety valve 18 is provided on the downstream side of the hot water stop valve 16 in order to prevent the hot water stop valve 16 from being damaged. That is, when water flows backward from a hot water mixing tap (not shown) provided at the end of the hot water discharge pipe 11, if the hot water shutoff valve 16 is closed, an impact (water) hammer) is hot water supply water stop valve 16 is applied to the hot water supply water stop valve 16 is is a risk that you damage. For this reason, the pressure safety valve 18 is provided on the downstream side of the hot water shutoff valve 16, and when such an impact caused by water pressure is transmitted to the hot water discharge pipe 11, the impact is released from the pressure safety valve 18.
[0005]
If the hot water stop valve 16 is provided on the upstream side of the heat exchanger 9 and the flow rate is reduced, the water pressure in the heat exchanger 9 is lowered and the boiling point of the hot water is lowered. It is provided downstream from the exchanger 9.
[0006]
[Problems to be solved by the invention]
According to the hot water supply automatic water stop type hot water supply apparatus as described above, a certain amount of hot water can be automatically supplied from the currant 22 into the bathtub. That is, when the currant 22 is opened on the bathtub and hot water is dropped from the currant 22 into the bathtub, the amount of hot water dropped into the bathtub is monitored by the water amount sensor. Water is automatically stopped by the hot water stop valve 16 of the pipe 11, and the dropping of hot water is stopped.
[0007]
At this time, conventionally, the hot water stop valve 16 of the hot water discharge pipe 11 is first closed, and then the gas electromagnetic valve 5 is closed to stop the combustion of the gas burner 3.
[0008]
Therefore, the hot water shutoff valve 16 is closed, and water confined between the check valve 21 provided between the city water and the water inlet pipe 10 and the hot water shutoff valve 16 is moved back in the heat exchanger 9. When boiling, the pressure safety valve 18 is also provided on the downstream side of the hot water shutoff valve 16, so there is no escape space for the pressure in the heat exchanger 9, and the internal pressure rises.
[0009]
The present invention has been made to solve the above-described technical problems, and an object of the present invention is to provide a pressure safety valve on the downstream side of a hot water stop valve such as a shutoff type overflow prevention servo valve. Another object of the present invention is to stop combustion without causing an increase in internal pressure due to post-boiling in a hot water supply device having a function of automatic hot water supply and automatic hot water stop.
[0016]
DISCLOSURE OF THE INVENTION
The method for controlling a hot water supply apparatus according to claim 1 is provided with a water stop valve on the downstream side of the heat exchanger, further provided with a pressure safety valve on the downstream side of the water stop valve, and a set amount when hot water is dropped into the bathtub. In the method of controlling a hot water supply apparatus in which hot water is automatically stopped when hot water is dropped, when performing hot water automatic water stop, the combustion operation is stopped, the combustion operation is stopped, and the heat exchanger temperature is It is characterized in that the water stop valve is closed after the temperature falls below a predetermined temperature.
[0017]
In the method for controlling a hot water supply apparatus according to claim 1 , for example, it is detected that a constant amount of hot water has been automatically poured (dropped) into the bathtub and the constant amount of hot water has been applied, and automatic hot water stoppage is performed. When performing, since the stoppage of the water stop valve is closed after the combustion operation is stopped and the heat exchanger temperature becomes equal to or lower than the predetermined temperature, the internal pressure in the heat exchanger does not increase due to post-boiling.
[0018]
The method for controlling a hot water supply apparatus according to claim 2 is provided with a water stop valve on the downstream side of the heat exchanger, further provided with a pressure safety valve on the downstream side of the water stop valve, and a set amount when hot water is dropped into the bathtub. In the method of controlling a hot water supply apparatus that automatically stops hot water when it is dropped, when performing hot water automatic stop, the combustion operation is stopped and the heat exchanger temperature is stopped after the combustion operation is stopped. Is characterized in that the water stop valve is closed after the temperature drops below a predetermined temperature.
[0019]
In the method for controlling a hot water supply apparatus according to claim 2 , when the hot water supply automatic water stoppage, the combustion operation is stopped, and after confirming that the heat exchanger temperature has decreased by a predetermined temperature or more, the water stop valve is closed. Therefore, the internal pressure in the heat exchanger is not increased by post-boiling.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
Hereinafter, the control method at the time of the combustion stop of the hot water supply device 1 according to one embodiment of the present invention will be described. Since the configuration of the hot water supply apparatus 1 is the same as that shown in FIG. 1, the illustration is omitted and the description will be made with reference to the reference numerals in FIG. First, FIG. 2 shows a control method at the time of combustion stop in the first embodiment. Step S1 represents a state in which the currant 22 is opened and hot water is filled (automatic hot water supply) into a bathtub (not shown). During this hot water filling operation, the bypass flow rate adjustment valve 20 is closed and the hot water supply stop valve 16 is opened, and the gas that is burned by the gas burner 3 and the water that flows in from the water inlet pipe 10 is heated by the heat exchanger 9. Then, the hot water pipe 11 is supplied to the bus adapter.
[0021]
The hot water supply device 1 measures the amount of water (integrated flow rate) of hot water dropped into the bathtub by the water amount sensor 12 while continuing the hot water filling (step S2), and when this amount of water reaches the set hot water amount, the gas solenoid valve 5 An OFF signal is outputted to close the valve (step S3), and the combustion state of the gas burner 3 is monitored by the flame rod 14 (step S4).
[0022]
When the flame rod 14 is turned off and the combustion stop of the gas burner 3 is confirmed, the elapsed time since the combustion stop is counted by the timer function built in the controller of the hot water supply device 1 (step S5). When the predetermined time has elapsed, the hot water stop valve 16 is fully closed (step S6).
[0023]
Therefore, even if the hot water flowing into the heat exchanger 9 is heated by the residual heat after the gas solenoid valve 5 is turned off and the subsequent boiling occurs, the hot water in the tapping pipe 11 remains hot water supply until a predetermined time elapses. Since it flows out through the valve 16, the internal pressure in the hot water discharge pipe 11 does not increase due to post-boiling.
[0024]
In addition, since the pressure safety valve 18 is provided downstream of the hot water stop valve 16, there is a possibility that the hot water stop valve 16 is opened after the combustion is stopped and an impact due to water pressure (water hammer) is transmitted to the heat exchanger 9. Absent.
[0025]
(Second Embodiment)
FIG. 3 shows a control method at the time of combustion stop of the hot water supply apparatus 1 according to the second embodiment of the present invention. In this embodiment, hot water filling is performed on the bathtub (step S1), and when the amount of hot water dropped reaches the set hot water amount (step S2), the gas electromagnetic valve 5 is closed (step S3).
[0026]
Next, when the flame rod 14 is turned off (step S4) and the combustion stop of the gas burner 3 is confirmed, the water flow sensor 12 measures the passage flow rate from the time of combustion stop (step S7), and the integrated value of the passage flow rate. Reaches a predetermined flow rate, the hot water stop valve 16 is fully closed (step S6).
[0027]
Therefore, even if the hot water flowing to the heat exchanger 9 is heated by the residual heat after the gas solenoid valve 5 is turned off and the subsequent boiling occurs, the hot water in the tapping pipe 11 remains hot until a predetermined flow rate flows. Since 16 is not closed, the internal pressure in the tapping pipe 11 is not increased by post-boiling.
[0028]
(Third embodiment)
FIG. 4 shows a control method when the hot water supply device 1 according to the third embodiment of the present invention stops combustion. In this embodiment, hot water filling is performed on the bathtub (step S1), and when the amount of hot water dropped reaches the set hot water amount (step S2), the gas electromagnetic valve 5 is closed (step S3).
[0029]
Next, when the flame rod 14 is turned off (step S4) and the combustion stop of the gas burner 3 is confirmed, the can body temperature sensor 15 measures the can body temperature (heat exchanger temperature) (step S7). When the body hot water temperature falls below a predetermined temperature, the hot water supply stop valve 16 is fully closed (step S6).
[0030]
Therefore, after the gas solenoid valve 5 is turned off, even if the hot water flowing to the heat exchanger 9 is heated by the residual heat and the subsequent boiling occurs, the hot water in the tapping pipe 11 remains until the can body temperature falls below a predetermined temperature. Since the hot water stop valve 16 is not closed, the internal pressure in the hot water discharge pipe 11 does not increase due to post-boiling.
[0031]
(Fourth embodiment)
FIG. 5 shows a control method at the time of combustion stop of the hot water supply device 1 according to the fourth embodiment of the present invention. In this embodiment, hot water filling is performed on the bathtub (step S1), and when the amount of hot water dropped reaches the set hot water amount (step S2), the gas electromagnetic valve 5 is closed (step S3).
[0032]
Next, when the flame rod 14 is turned off (step S4), and the combustion stop of the gas burner 3 is confirmed, the can body temperature is monitored by the can body temperature sensor 15 (step S9), and the temperature drop from the time of the combustion stop. When the amount exceeds the predetermined temperature, the hot water stop valve 16 is fully closed (step S6).
[0033]
Therefore, after the gas solenoid valve 5 is turned off, even if the hot water flowing to the heat exchanger 9 is heated by the residual heat and the subsequent boiling occurs, the hot water in the tapping pipe 11 remains until the temperature of the can body drops below a predetermined temperature. Since the hot water stop valve 16 is not closed, the internal pressure in the hot water discharge pipe 11 does not increase due to post-boiling.
[0034]
In the above embodiment, after confirming that the frame rod is turned off, the elapse of a predetermined time, a predetermined flow rate, a can body temperature below a predetermined temperature, a decrease in the can body temperature above a predetermined temperature, and the like are detected. However, in either case, step S4 may be omitted, and these processes may be performed immediately after the gas solenoid valve is closed in step S3.
[0035]
Further, for example, step S5 in the first embodiment may be omitted, and the hot water stop valve may be closed immediately after confirming the combustion stop by turning off the frame rod.
[0036]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the raise of the internal pressure by the post-boiling in the heat exchanger at the time of hot water supply automatic water stop can be prevented.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of a hot water supply automatic water stop type hot water supply apparatus.
FIG. 2 is a flowchart showing a control method when combustion is stopped according to an embodiment of the present invention.
FIG. 3 is a flowchart showing a control method when combustion is stopped according to another embodiment of the present invention.
FIG. 4 is a flowchart showing a control method at the time of combustion stop according to still another embodiment of the present invention.
FIG. 5 is a flowchart showing a control method when combustion is stopped according to still another embodiment of the present invention.
[Explanation of symbols]
3 Gas Burner 9 Heat Exchanger 10 Inlet Channel 11 Outlet Channel 12 Water Quantity Sensor 14 Frame Rod 15 Can Body Temperature Sensor 16 Hot Water Stop Valve 18 Pressure Safety Valve 22 Curan

Claims (2)

熱交換器の下流側に止水弁を設け、さらに該止水弁の下流側に圧力安全弁を設け、浴槽への湯の落とし込み時に設定量の湯が落とし込まれたら湯を自動止水するようにした給湯装置の制御方法において、
給湯自動止水を行なう際には、燃焼運転を停止し、該燃焼運転が停止して熱交換器温度が所定温度以下になった後に止水弁を閉止することを特徴とする給湯装置の制御方法。
Provide a water stop valve on the downstream side of the heat exchanger, and a pressure safety valve on the downstream side of the water stop valve so that the hot water is automatically shut off when a set amount of hot water is dropped into the bathtub. In the control method of the hot water supply device,
When performing hot water supply automatic water stop, control of the hot water supply device is characterized in that the combustion operation is stopped and the water stop valve is closed after the combustion operation stops and the heat exchanger temperature falls below a predetermined temperature. Method.
熱交換器の下流側に止水弁を設け、さらに該止水弁の下流側に圧力安全弁を設け、浴槽への湯の落とし込み時に設定量の湯が落とし込まれたら湯を自動止水するようにした給湯装置の制御方法において、
給湯自動止水を行なう際には、燃焼運転を停止し、該燃焼運転が停止してから熱交換器温度が所定温度以上低下した後に止水弁を閉止することを特徴とする給湯装置の制御方法。
Provide a water stop valve on the downstream side of the heat exchanger, and a pressure safety valve on the downstream side of the water stop valve so that the hot water is automatically shut off when a set amount of hot water is dropped into the bathtub. In the control method of the hot water supply device,
Control of a hot water supply device, characterized in that when performing hot water automatic stop water, the combustion operation is stopped and the water stop valve is closed after the heat exchanger temperature has fallen by a predetermined temperature or more after the combustion operation is stopped. Method.
JP34741599A 1999-12-07 1999-12-07 Control method for water heater Expired - Lifetime JP3671780B2 (en)

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JP5137311B2 (en) * 2006-03-14 2013-02-06 株式会社パロマ Water heater
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