JPH10160244A - One-can two-channel bath hot water supply equipment - Google Patents
One-can two-channel bath hot water supply equipmentInfo
- Publication number
- JPH10160244A JPH10160244A JP8334993A JP33499396A JPH10160244A JP H10160244 A JPH10160244 A JP H10160244A JP 8334993 A JP8334993 A JP 8334993A JP 33499396 A JP33499396 A JP 33499396A JP H10160244 A JPH10160244 A JP H10160244A
- Authority
- JP
- Japan
- Prior art keywords
- hot water
- water level
- water supply
- temperature
- reheating
- 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.)
- Granted
Links
Landscapes
- Control For Baths (AREA)
Abstract
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【発明の属する技術分野】本発明は、給湯熱交換器と追
い焚き熱交換器が一体化され、その一体化した熱交換器
を共通のバーナーで加熱する一缶二水路風呂給湯器に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a one-can-two-channel bath water heater in which a hot water supply heat exchanger and a reheating heat exchanger are integrated, and the integrated heat exchanger is heated by a common burner. is there.
【０００２】[0002]
【従来の技術】図７には出願人らが開発している一缶二
水路風呂給湯器のシステム構成例が示されている。同図
において、この一缶二水路風呂給湯器（器具）は燃焼室
１を有し、この燃焼室１にはバーナー２が配設され、こ
のバーナー２の上方には給湯熱交換器３と追い焚き熱交
換器４が設けられている。これら給湯熱交換器３と追い
焚き熱交換器４は一体化されて配設されている。すなわ
ち、複数の共通のフィンプレート５に給湯側の管路を貫
通装着して給湯熱交換器３と成し、同じくフィンプレー
ト５に追い焚き側の管路を貫通装着して風呂熱交換器４
と成しており、上記バーナー２は給湯熱交換器３と追い
焚き熱交換器４を共に加熱する構成になっている。2. Description of the Related Art FIG. 7 shows an example of a system configuration of a one-can-two-channel bath water heater developed by the applicants. In this figure, this one-can two-channel bath water heater (apparatus) has a combustion chamber 1, in which a burner 2 is disposed. A burning heat exchanger 4 is provided. The hot water supply heat exchanger 3 and the reheating heat exchanger 4 are disposed integrally. That is, a hot water supply heat exchanger 3 is formed by penetrating a plurality of common fin plates 5 with a hot water supply side pipe, and a hot water supply heat exchanger 3 is similarly mounted by penetrating a fin plate 5 with a supplementary heating side pipe.
The burner 2 is configured to heat both the hot water supply heat exchanger 3 and the additional heating heat exchanger 4.
【０００３】上記バーナー２の下方側の燃焼室１は給気
通路６に連通され、この給気通路６には燃焼ファン７が
組み込まれており、燃焼ファン７の回転駆動により外部
から給気通路６を介してバーナー２へ空気が送り込まれ
ると共に、バーナー２の燃焼により生じた排気ガスがバ
ーナー２の上方の燃焼室１に連通する排気通路９から外
部へ排出される。The combustion chamber 1 below the burner 2 communicates with an air supply passage 6, and a combustion fan 7 is incorporated in the air supply passage 6. Air is sent to the burner 2 via the burner 6, and exhaust gas generated by combustion of the burner 2 is discharged to the outside from an exhaust passage 9 communicating with the combustion chamber 1 above the burner 2.
【０００４】上記バーナー２のガス導入口にはガスノズ
ル１９が対向配設され、このガスノズル１９には燃料ガ
スを導入するためのガス供給通路８が接続されており、
このガス供給通路８により導かれた燃料ガスはガスノズ
ル１９を介してバーナー２に供給される。また、上記ガ
ス供給通路８には通路の開閉を行う電磁弁１０，１１
ａ，１１ｂと、ガスの供給量を開弁量により制御する比
例弁１２とが介設されている。[0004] A gas nozzle 19 is provided opposite to the gas inlet of the burner 2, and the gas nozzle 19 is connected to a gas supply passage 8 for introducing a fuel gas.
The fuel gas guided by the gas supply passage 8 is supplied to the burner 2 via a gas nozzle 19. The gas supply passage 8 has solenoid valves 10 and 11 for opening and closing the passage.
a, 11b, and a proportional valve 12 for controlling the gas supply amount based on the valve opening amount.
【０００５】前記給湯熱交換器３の入側には給水通路１
３の一端側が接続され、給湯熱交換器３の出側には給湯
通路１４の一端側が接続されており、上記給水通路１３
の他端側は外部配管を介して水供給源に接続され、前記
給湯通路１４の他端側は外部配管を介して台所等の所望
の給湯場所に導かれている。また、上記給湯熱交換器３
の入側の給水通路１３と出側の給湯通路１４を短絡する
常時バイパス通路１５とバイパス通路１６が設けられて
おり、上記バイパス通路１６には通路の開閉を行う電磁
弁１７が介設されている。[0005] A water supply passage 1 is provided on the inlet side of the hot water supply heat exchanger 3.
3 is connected to one end of a hot water supply heat exchanger 3, and one end of a hot water supply passage 14 is connected to the outlet of the hot water supply heat exchanger 3.
Is connected to a water supply source through an external pipe, and the other end of the hot water supply passage 14 is guided to a desired hot water supply place such as a kitchen through the external pipe. The hot water supply heat exchanger 3
A bypass path 15 and a bypass path 16 for short-circuiting the water supply passage 13 on the inlet side and the hot water supply path 14 on the outlet side are provided, and the bypass passage 16 is provided with an electromagnetic valve 17 for opening and closing the passage. I have.
【０００６】前記追い焚き熱交換器４の入側には管路１
８の一端側が接続され、この管路１８の他端側は循環ポ
ンプ２０の吐出口に接続されており、循環ポンプ２０の
吸入口には戻り管２１の一端側が接続され、戻り管２１
の他端側は浴槽２２に連接されている。また、追い焚き
熱交換器４の出側には管路２３の一端側が接続されてお
り、この管路２３の他端側は前記浴槽２２に連接されて
いる。上記戻り管２１と管路１８と追い焚き熱交換器４
と管路２３により追い焚き循環通路２４が構成される。A line 1 is provided on the inlet side of the reheater 4.
8 is connected, the other end of the conduit 18 is connected to the discharge port of the circulation pump 20, one end of the return pipe 21 is connected to the suction port of the circulation pump 20, and the return pipe 21
Is connected to the bathtub 22 at the other end. One end of a pipe 23 is connected to the outlet side of the reheater 4, and the other end of the pipe 23 is connected to the bathtub 22. The return pipe 21, the pipe 18, and the reheating heat exchanger 4
And the pipeline 23 constitute a reheating circulation passage 24.
【０００７】上記追い焚き循環通路２４の管路１８と前
記給湯通路１４は湯張り通路２５により連通されてお
り、この湯張り通路２５には通路の開閉を制御する注湯
制御弁２６と、浴槽２２の水位を水圧により検出する水
位センサ２８とが設けられている。The pipe line 18 of the additional heating circulation passage 24 and the hot water supply passage 14 are communicated by a hot water supply passage 25. The hot water supply passage 25 has a pouring control valve 26 for controlling opening and closing of the passage, and a bathtub. And a water level sensor 28 for detecting the water level of the nozzle 22 by water pressure.
【０００８】なお、図中に示す３０は燃焼室１内の風量
を検出する風量センサであり、３１は給水通路１３に設
けられて給水の流量を検出する水量センサであり、３２
は給水通路１３の水の温度を検出する入水温度センサで
あり、３４は給湯通路１４に設けられて給湯の流量を制
御する流量制御弁であり、３５は給湯通路１４に設けら
れて給湯が行われていることを水流により検出する給湯
確認スイッチであり、３６は追い焚き循環通路２４の水
流を検出する水流センサであり、３７は追い焚き循環通
路２４の湯水を浴槽湯水の温度（風呂温度）として検出
する追い焚き循環通路温度センサである風呂温度センサ
であり、３８は給湯熱交換器３で作り出された湯の温度
を検出する出湯温度センサである。Reference numeral 30 shown in the figure is an air volume sensor for detecting the air volume in the combustion chamber 1, 31 is a water volume sensor provided in the water supply passage 13 for detecting the flow rate of the water supply, and 32
Reference numeral 34 denotes a water temperature sensor for detecting the temperature of water in the water supply passage 13, reference numeral 34 denotes a flow control valve provided in the water supply passage 14 to control the flow rate of hot water, and reference numeral 35 denotes a flow control valve provided in the water supply passage 14 to supply hot water. Reference numeral 36 denotes a hot water supply confirmation switch for detecting that water is flowing, a reference numeral 36 denotes a water flow sensor for detecting the flow of water in the reheating circulation passage 24, and reference numeral 37 denotes a temperature (bath temperature) of hot water in the reheating circulation passage 24 in the bathtub. A bath temperature sensor, which is a reburning circulation passage temperature sensor, detects the temperature of the hot water produced by the hot water supply heat exchanger 3.
【０００９】この一缶二水路風呂給湯器には制御装置４
０が設けられており、この制御装置４０にはリモコン４
１が接続されている。このリモコン４１には給湯温度を
設定するための給湯温度設定手段や、浴槽２２の風呂の
温度を設定する風呂温度設定手段や、浴槽２２の湯水の
水位を設定する風呂水位設定手段や、浴槽２２の湯張り
から保温に至るまでの一連の風呂の自動運転を開始させ
るための自動運転ボタン等が設けられている。[0009] This one-can-two-channel water heater has a control device 4
0 is provided, and the remote controller 4
1 is connected. The remote controller 41 has hot water supply temperature setting means for setting the hot water supply temperature, bath temperature setting means for setting the temperature of the bath in the bathtub 22, bath water level setting means for setting the water level of the hot water in the bathtub 22, and bathtub 22. An automatic operation button or the like is provided for starting a series of automatic operations of the bath from the hot water filling to the heat retention.
【００１０】上記制御装置４０は各種センサのセンサ出
力信号やリモコン４１の情報を取り込み、予め与えられ
ているシーケンスプログラムに従って、給湯運転や、風
呂の自動運転等の各種の運転モードの動作を次のように
制御する。The control device 40 fetches sensor output signals of various sensors and information of the remote controller 41, and performs operations of various operation modes such as a hot water supply operation and a bath automatic operation in accordance with a given sequence program. Control.
【００１１】例えば、台所等に導かれた給湯通路の水栓
が開けられ、水供給源から給水通路１３に水が流れ込ん
で水量センサ３１が給水通路１３の通水を検出すると、
器具は給湯モードの運転を開始する。まず、燃焼ファン
７の回転駆動を開始させ、電磁弁１１ａ，１１ｂの両方
又はどちらか一方と電磁弁１０を開動作させガス供給通
路８を通してバーナー２に燃料ガスを供給し、図示され
ていない点着火手段によりバーナー２の点着火を行い燃
焼を開始させる。For example, when the faucet of the hot water supply passage led to the kitchen or the like is opened, water flows from the water supply source into the water supply passage 13 and the water amount sensor 31 detects the flow of water through the water supply passage 13.
The appliance starts operation in the hot water supply mode. First, the rotational drive of the combustion fan 7 is started to open the solenoid valve 10 and / or one or both of the solenoid valves 11a and 11b, thereby supplying fuel gas to the burner 2 through the gas supply passage 8 to a point not shown. The burner 2 is ignited by the ignition means to start combustion.
【００１２】そして、給湯湯温がリモコン４１に設定さ
れている給湯設定湯温となるように比例弁１２の開弁量
を制御して（バーナー２への供給ガス量を制御して）バ
ーナー２の燃焼熱量を制御し、給湯熱交換器３の通水を
バーナー２の燃焼火炎により加熱して設定温度の湯を作
り出し、この湯を給湯通路１４を通して給湯場所に供給
する。The opening amount of the proportional valve 12 is controlled (by controlling the amount of gas supplied to the burner 2) so that the hot water temperature becomes the hot water setting hot water temperature set in the remote controller 41. The hot water of the hot water supply heat exchanger 3 is heated by the combustion flame of the burner 2 to produce hot water at a set temperature, and this hot water is supplied to the hot water supply place through the hot water supply passage 14.
【００１３】湯の使用が終了して水栓が閉められると、
給湯熱交換器３への通水が停止し、水量センサ３１が給
水通路１３の通水を検知しなくなったときに、電磁弁１
０を閉じてバーナー２の燃焼を停止させる。その後、燃
焼室１内の排気ガスの排出がほぼ終了するポストパージ
期間（例えば、５分間）が経過したときに、燃焼ファン
７の回転駆動を停止して給湯モードの運転を終了し次の
給湯に備える。When the use of hot water is finished and the faucet is closed,
When the water supply to the hot water supply heat exchanger 3 is stopped and the water amount sensor 31 stops detecting the water supply through the water supply passage 13, the solenoid valve 1
0 is closed to stop the burner 2 from burning. Thereafter, when a post-purge period (for example, 5 minutes) in which the exhaust gas in the combustion chamber 1 is almost completely discharged has elapsed, the rotation drive of the combustion fan 7 is stopped to end the operation in the hot water supply mode, and the next hot water supply is started. Prepare for.
【００１４】また、リモコン４１の自動運転ボタンによ
り風呂の自動運転が指令されると、図８のフローチャー
トのステップ１０１に示すように、まず、湯張りモード
の動作が開始される。例えば、注湯制御弁２６を開弁
し、この注湯制御弁２６の開弁動作により水供給源から
給水通路１３に水が流れ込み水量センサ３１が給水通路
１３の通水を検知すると、上記給湯運転と同様にバーナ
ー２の燃焼を開始させる。When the automatic operation of the bath is instructed by the automatic operation button of the remote controller 41, the operation in the hot water filling mode is first started as shown in step 101 of the flowchart of FIG. For example, when the pouring control valve 26 is opened and water flows from the water supply source into the water supply passage 13 by the opening operation of the pouring control valve 26, and the water amount sensor 31 detects the flow of water through the water supply passage 13, the hot water supply The combustion of the burner 2 is started similarly to the operation.
【００１５】このバーナー２の燃焼火炎により給湯熱交
換器３で作り出された湯は給湯通路１４と湯張り通路２
５を順に介して追い焚き循環通路２４に送り込まれ、追
い焚き循環通路２４に流れ込んだ湯は戻り管２１を通る
経路と追い焚き熱交換器４を通る経路との２経路で浴槽
２２に落とし込まれる。水位センサ２８が検出する浴槽
２２の水位がリモコン４１に設定されている設定水位に
達したときに、注湯制御弁２６を閉じ、電磁弁１０を閉
じてバーナー２の燃焼を停止させ、湯張りモードの動作
を終了する。Hot water produced in the hot water supply heat exchanger 3 by the combustion flame of the burner 2 is supplied to the hot water supply passage 14 and the hot water supply passage 2.
5, the hot water which has been sent into the reheating circulation passage 24 through the reheating circulation passage 24 is dropped into the bathtub 22 in two paths, a path passing through the return pipe 21 and a path passing through the reheating heat exchanger 4. It is. When the water level in the bathtub 22 detected by the water level sensor 28 reaches the set water level set in the remote controller 41, the pouring control valve 26 is closed, the solenoid valve 10 is closed, and the combustion of the burner 2 is stopped. The mode operation ends.
【００１６】この湯張りモードの動作終了後に、図８の
ステップ１０２に示すように、循環ポンプ２０を駆動さ
せ、浴槽２２の湯水を追い焚き循環通路２４を通して循
環させて浴槽２２の湯水を撹拌させ、ステップ１０３
で、風呂温度センサ３７により浴槽２２の風呂温度を検
出し、ステップ１０４で、検出した風呂温度Ｔhが風呂
の設定温度Ｔsよりも低いか否かを判断し、風呂温度Ｔh
が設定温度Ｔs よりも低いと判断したときには、ステッ
プ１１０に進み、追い焚きモードの動作を開始する。After the operation in the hot water filling mode, as shown in step 102 of FIG. 8, the circulation pump 20 is driven to circulate the hot water in the bathtub 22 through the additional heating circulation passage 24 to stir the hot water in the bathtub 22. , Step 103
Then, the bath temperature of the bathtub 22 is detected by the bath temperature sensor 37, and in step 104, it is determined whether the detected bath temperature Th is lower than the set temperature Ts of the bath, and the bath temperature Th is determined.
Is lower than the set temperature Ts, the routine proceeds to step 110, where the operation in the reheating mode is started.
【００１７】例えば、循環ポンプ２０の駆動を引き続き
行って、浴槽２２内の湯水を追い焚き循環通路２４を通
して循環させると共に、バーナー２の燃焼を開始させ、
バーナー２の燃焼火炎により、追い焚き熱交換器４で上
記循環湯水を加熱して追い焚きを行う。風呂温度センサ
３７により検出される風呂温度Ｔhが設定温度Ｔsに達し
たと前記ステップ１０４で判断したときには、バーナー
２の燃焼を停止させ、追い焚きモードの動作を終了す
る。For example, by continuing to drive the circulation pump 20, the water in the bathtub 22 is circulated through the reheating boiler circulation passage 24, and the combustion of the burner 2 is started.
With the combustion flame of the burner 2, the circulating hot water is heated by the reheating heat exchanger 4 to perform reheating. When it is determined in step 104 that the bath temperature Th detected by the bath temperature sensor 37 has reached the set temperature Ts, the combustion of the burner 2 is stopped, and the operation in the reheating mode is ended.
【００１８】そして、ステップ１０５に示すように、循
環ポンプ２０を停止させると共に、制御装置４０に内蔵
されているタイマによる時間計測をスタートさせ、保温
モードの動作を開始する。Then, as shown in step 105, the circulation pump 20 is stopped, and at the same time, the time measurement by the timer built in the control device 40 is started, and the operation in the warming mode is started.
【００１９】例えば、ステップ１０６に示すように、上
記タイマの計測時間ｔcが予め定められた設定時間ｔs
（例えば、３０分）に達したか否かを判断する。上記計
測時間ｔcが設定時間ｔsに達したと判断したときには、
上記ステップ１０２からステップ１０５までの動作を行
い、風呂の温度Ｔhが設定温度Ｔsよりも低下している場
合には追い焚きを行って風呂の温度Ｔhを設定温度Ｔsに
保つことができる。For example, as shown in step 106, the measured time tc of the timer is set to a predetermined set time ts.
(For example, 30 minutes) is determined. When it is determined that the measurement time tc has reached the set time ts,
The operations from step 102 to step 105 are performed. If the bath temperature Th is lower than the set temperature Ts, reheating is performed to maintain the bath temperature Th at the set temperature Ts.
【００２０】また、前記ステップ１０６でタイマの計測
時間ｔcが設定時間ｔsに達していないと判断される期間
には、ステップ１０７，１０８，１０９に示す保水モー
ドの動作を行う。During the period in which it is determined in step 106 that the measured time tc of the timer has not reached the set time ts, the operation in the water retention mode shown in steps 107, 108 and 109 is performed.
【００２１】まず、ステップ１０７で、水位センサ２８
が検出するセンサ出力を検出する。上記水位センサ２８
は湯張り通路２５内の湯水の水圧を浴槽２２の水圧とし
て検出し、その浴槽水位の水圧をセンサ出力として出力
するものである。前記制御装置４０には水位センサ２８
が検出するセンサ出力（Ｐ）と、浴槽２２の水量（Ｑ）
との関係を表す図９の実線Ａに示すようなＰ−Ｑデータ
が予め求め与えられており、前記水位センサ２８のセン
サ出力を上記Ｐ−Ｑデータに参照して浴槽２２の水位を
検出する。First, at step 107, the water level sensor 28
Detects the sensor output that is detected. The water level sensor 28
Detects the water pressure of the hot water in the hot water passage 25 as the water pressure of the bathtub 22, and outputs the water pressure of the bathtub water level as a sensor output. The controller 40 includes a water level sensor 28
Sensor output (P) detected by the sensor and the amount of water in the bathtub 22 (Q)
The PQ data as shown by the solid line A in FIG. 9 representing the relationship with is obtained in advance, and the sensor output of the water level sensor 28 is referred to the PQ data to detect the water level in the bathtub 22. .
【００２２】そして、ステップ１０８で、上記検出され
た浴槽２２の水位Ｐkが設定水位Ｐsよりも低下している
か否かを判断し、浴槽２２の水位Ｐkが設定水位Ｐsより
も低下していないと判断したときには前記水位センサ２
８による水位検出動作を前記ステップ１０６以降の動作
により繰り返し行い、また、浴槽２２の水位Ｐkが入浴
者による湯の使用等により設定水位Ｐsよりも低下して
いると判断したときには、ステップ１０９で、湯張りの
動作を開始して、浴槽２２への注湯を行い、浴槽２２の
水位Ｐkを設定水位Ｐsまで上昇させる。At step 108, it is determined whether or not the detected water level Pk of the bathtub 22 is lower than the set water level Ps. If the water level Pk of the bathtub 22 is not lower than the set water level Ps. When determined, the water level sensor 2
When the water level Pk of the bathtub 22 is determined to be lower than the set water level Ps due to the use of hot water by the bather, the water level detection operation of Step 8 is repeated by the operation of Step 106 and thereafter. The hot water filling operation is started, the hot water is poured into the bathtub 22, and the water level Pk of the bathtub 22 is raised to the set water level Ps.
【００２３】上記保水モードの動作は前記タイマの計測
時間ｔcが設定時間ｔsになるまで、繰り返し行われる。The operation in the water retention mode is repeated until the measured time tc of the timer reaches the set time ts.
【００２４】上記保水動作を含む保温モードの動作は、
予め定められている期間（例えば、風呂が沸き上がって
から４時間の間）に渡り行われる。The operation in the heat retaining mode including the water retaining operation is as follows.
This is performed for a predetermined period (for example, for 4 hours after the bath is heated).
【００２５】前記の如く、一缶二水路風呂給湯器は、一
体化された給湯熱交換器３と追い焚き熱交換器４を共通
のバーナー２を用いて加熱する方式であるので、別体に
設けられた給湯熱交換器と追い焚き熱交換器をそれぞれ
別個のバーナーを用いて燃焼加熱する方式に比べて、装
置構成の簡易化が図れ、これに伴い、装置の小型化とコ
ストの低減を図れることになる。As described above, the one-can-two-channel bath water heater uses a system in which the integrated hot water supply heat exchanger 3 and the reheating heat exchanger 4 are heated using the common burner 2, so that they are separately provided. The system configuration can be simplified as compared to the system in which the provided hot water supply heat exchanger and the reheating heat exchanger are each heated and burned by using separate burners, thereby reducing the size and cost of the system. I can plan.
【００２６】[0026]
【発明が解決しようとする課題】ところで、一缶二水路
風呂給湯器が追い焚き運転を行わず給湯のみの給湯単独
運転を行うと、給湯単独運転直後等には次のような理由
により正確な浴槽２２の水位を得ることができないこと
が出願人らの実験によりわかった。By the way, when the one-can-two-channel bath water heater performs only the hot water supply operation without performing the reheating operation, the accurate operation immediately after the hot water supply alone operation is performed for the following reasons. It was found by experiments by the applicants that the water level in the bathtub 22 could not be obtained.
【００２７】上記給湯単独運転時には追い焚き熱交換器
４内に湯水が滞留している状態にあり、給湯運転のため
にバーナー２を燃焼させると、バーナー２の燃焼火炎に
よって給湯熱交換器３だけでなく追い焚き熱交換器４も
加熱されるので、上記追い焚き熱交換器４内の滞留湯水
は加熱される。このため、追い焚き熱交換器４内の滞留
湯水の温度が上昇し沸騰状態になる。During the hot water supply operation alone, the hot water stays in the reheating heat exchanger 4. When the burner 2 is burned for the hot water supply operation, only the hot water supply heat exchanger 3 is activated by the combustion flame of the burner 2. However, since the reheating heat exchanger 4 is also heated, the retained hot water in the reheating heat exchanger 4 is heated. For this reason, the temperature of the retained hot water in the reheating heat exchanger 4 rises to a boiling state.
【００２８】上記追い焚き熱交換器４内の高温加熱され
た湯水は対流現象により追い焚き熱交換器４の入側の管
路１８と出側の管路２３の両側へ流れ出て、この追い焚
き熱交換器４から流れ出た高温の湯水の熱により追い焚
き循環通路２４や該追い焚き循環通路２４に連通する連
通通路である湯張り通路２５内の湯水の温度が、例え
ば、７０〜８０℃と、かなり高温まで上昇する。The high-temperature heated water in the reheating heat exchanger 4 flows to both sides of the inlet pipe 18 and the outlet pipe 23 of the reheating heat exchanger 4 due to a convection phenomenon. The temperature of the hot water in the hot water circulation passage 24 and the hot water passage 25 which is a communication passage communicating with the hot water circulation channel 24 is, for example, 70 to 80 ° C. due to the heat of the high-temperature hot water flowing out of the heat exchanger 4. Rises to quite high temperatures.
【００２９】このように、湯張り通路２５内の湯水温度
が高温に上昇することにより、水位センサ２８の予め定
められている保証温度範囲（正確な水位検出が保証され
ている水温範囲（例えば、５〜４８℃））を越えてしま
うので、水位センサ２８が正確な水圧を検出することが
できなくなり、図１０の（ｂ）に示すように、水位セン
サ２８のセンサ出力が、浴槽２２の水位が変化していな
いのにも拘らず、大きな温度依存性をもって上昇する方
向に又は下降する方向にシフトしてしまう。As described above, when the temperature of the hot water in the hot water passage 25 rises to a high temperature, a predetermined guaranteed temperature range of the water level sensor 28 (for example, a water temperature range where accurate water level detection is guaranteed (for example, 5 to 48 ° C.), the water level sensor 28 cannot detect an accurate water pressure. As shown in FIG. 10B, the sensor output of the water level sensor 28 indicates the water level of the bathtub 22. Is shifted in an ascending direction or a descending direction with a large temperature dependency, even though is not changed.
【００３０】その上、上記の如く、追い焚き熱交換器４
内の高温加熱された湯水が追い焚き熱交換器４の入側の
管路１８と出側の管路２３の両側へ流れ出ると共に、管
路１８と管路２３の両側から追い焚き熱交換器４内にぬ
るめの湯水が流れ込む対流が生じるので、この湯水の対
流により追い焚き循環通路２４および湯張り通路２５内
の湯水に不規則な振動が生じ、この湯張り通路２５内の
湯水の不規則な振動により、図１０の（ｂ）に示すよう
に、水位センサ２８のセンサ出力が不規則に振動する。In addition, as described above, the reheater 4
The high-temperature heated hot water in the inside flows out to both sides of the pipeline 18 on the inlet side and the pipeline 23 on the outlet side of the reheating heat exchanger 4, and the reheater 4 from both sides of the pipeline 18 and the pipeline 23. A convection in which lukewarm water flows into the inside of the inside of the tank causes irregular vibrations in the hot water circulation passage 24 and the hot water in the hot water passage 25 due to the convection of the hot water, so that the hot water in the hot water passage 25 becomes irregular. Due to the vibration, the sensor output of the water level sensor 28 vibrates irregularly, as shown in FIG.
【００３１】上記のように、給湯単独運転時に追い焚き
熱交換器４内の湯水が高温加熱されることにより、湯張
り通路２５内の湯水の温度上昇と不規則振動が相乗的に
関与して水位センサ２８のセンサ出力が不規則に変動
し、この水位センサ２８のセンサ出力に基づいて浴槽２
２の水位を正確に検出することは困難である。As described above, when the hot water in the reheating heat exchanger 4 is heated at a high temperature during the hot water supply alone operation, the rise in the temperature of the hot water in the hot water filling passage 25 and the irregular vibration are synergistically involved. The sensor output of the water level sensor 28 fluctuates irregularly, and based on the sensor output of the water level sensor 28, the bathtub 2
It is difficult to accurately detect the second water level.
【００３２】上記のように、給湯単独運転により浴槽２
２の水位を正確に検出することが困難となり、例えば、
自動運転の保温モードの運転中に給湯割り込みが行われ
て給湯単独運転が行われると、水位センサ２８の出力が
上昇シフトする場合には浴槽２２の水位よりも高めの水
位が検出され、浴槽２２の水位が設定水位よりも低下し
ているのに保水動作が行われないというような誤動作が
生じてしまう場合がある。また、水位センサ２８の出力
が下降シフトする場合には浴槽２２の水位よりも低めの
水位が検出され、浴槽２２の水位が設定水位よりも低下
していないのに保水動作が行われてしまう場合がある。As described above, the bathtub 2 is operated by the hot water supply alone operation.
It becomes difficult to accurately detect the water level of 2, for example,
When the hot water supply interruption is performed and the hot water supply alone operation is performed during the operation of the warming mode of the automatic operation, when the output of the water level sensor 28 shifts upward, a water level higher than the water level of the bathtub 22 is detected. In some cases, a malfunction may occur such that the water holding operation is not performed even though the water level is lower than the set water level. Further, when the output of the water level sensor 28 shifts downward, a water level lower than the water level of the bathtub 22 is detected, and the water holding operation is performed even though the water level of the bathtub 22 is not lower than the set water level. There is.
【００３３】本発明は、上記課題を解決するためになさ
れたものであり、その目的は、給湯単独運転に起因した
水位センサ出力の不規則変動により器具が誤動作するの
を防止することができる一缶二水路風呂給湯器を提供す
ることにある。The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to prevent a malfunction of an appliance due to an irregular fluctuation of a water level sensor output caused by a single operation of hot water supply. An object of the present invention is to provide a two-channel water heater.
【００３４】[0034]
【課題を解決するための手段】上記目的を達成するため
にこの発明は次のような構成をもって前記課題を解決す
る手段としている。すなわち、第１の発明は、給水通路
から供給される水を加熱して給湯通路へ送出する給湯熱
交換器と、浴槽湯水の追い焚き循環通路に組み込まれ追
い焚き循環通路を循環する循環湯水の追い焚きを行う追
い焚き熱交換器と、追い焚き循環通路に配設され湯水温
度を検出する追い焚き循環通路温度センサと、追い焚き
循環通路又は追い焚き循環通路に連通する連通通路に配
設され浴槽の湯水の水位を水圧により検出する水位セン
サとを備え、上記給湯熱交換器と追い焚き熱交換器は一
体化され、この一体化された給湯熱交換器と追い焚き熱
交換器を加熱する共通のバーナーが設けられ、予め定め
られたタイミングで上記水位センサによる水位検出動作
が行われる一缶二水路タイプの風呂給湯器において、一
缶二水路風呂給湯器が追い焚き運転を行わず給湯運転だ
けを行う給湯単独運転を行っているか否かを監視する給
湯単独運転監視部と；給湯単独運転の停止後に水位セン
サの配設位置の水温を直接的に検出した直接検出値ある
いは水位センサの配設位置の水温を推定検出した推定検
出値が予め定めたしきい値に達するまで、又は、上記し
きい値に達してから予め定めた余裕期間が経過するまで
水位センサによる水位検出動作を停止させる水位検出停
止部と；を設けた構成をもって前記課題を解決する手段
としている。Means for Solving the Problems To achieve the above object, the present invention has the following structure to solve the above problems. That is, the first invention is a hot water supply heat exchanger that heats water supplied from a water supply passage and sends it out to the hot water supply passage, and a circulating hot water that is incorporated in the bath tub hot water circulation passage and circulates through the reheating circulation passage. A reheating heat exchanger for reheating, a reheating circulation passage temperature sensor disposed in the reheating circulation passage to detect hot water temperature, and a communication passage communicating with the reheating circulation passage or the reheating circulation passage. A water level sensor for detecting the level of hot water in the bathtub by water pressure; the hot water supply heat exchanger and the reheating heat exchanger are integrated; and the integrated hot water supply heat exchanger and the reheating heat exchanger are heated. In a one-can-two-channel type bath water heater in which a common burner is provided and the water level detection operation is performed by the water level sensor at a predetermined timing, the one-can-two-channel water heater performs a reheating operation. A hot water supply independent operation monitoring unit that monitors whether or not a single hot water supply operation is being performed; a direct detection value that directly detects a water temperature at a position where a water level sensor is disposed after the hot water supply alone operation is stopped; Water level detection by the water level sensor until the estimated detection value obtained by estimating the water temperature at the location of the water level sensor reaches a predetermined threshold value or until a predetermined allowance period elapses after reaching the threshold value. And a water level detection stop unit for stopping the operation;
【００３５】第２の発明は、給水通路から供給される水
を加熱して給湯通路へ送出する給湯熱交換器と、浴槽湯
水の追い焚き循環通路に組み込まれ追い焚き循環通路を
循環する循環湯水の追い焚きを行う追い焚き熱交換器
と、追い焚き循環通路又は追い焚き循環通路に連通する
連通通路に配設され浴槽の湯水の水位を水圧により検出
する水位センサとを備え、上記給湯熱交換器と追い焚き
熱交換器は一体化され、この一体化された給湯熱交換器
と追い焚き熱交換器を加熱する共通のバーナーと、該バ
ーナーへの給排気を行う燃焼ファンとが設けられ、予め
定められたタイミングで上記水位センサによる水位検出
動作が行われる一缶二水路タイプの風呂給湯器におい
て、一缶二水路風呂給湯器が追い焚き運転を行わず給湯
運転だけを行う給湯単独運転を行っているか否かを監視
する給湯単独運転監視部と；給湯単独運転の停止後に燃
焼ファンを継続駆動させて追い焚き熱交換器を冷却する
ファン駆動部と；給湯単独運転の停止後に水位センサの
配設位置の水温を直接的に検出した直接検出値あるいは
水位センサの配設位置の水温を推定検出した推定検出値
が予め定めたしきい値に達するまで、又は、上記しきい
値に達してから予め定めた余裕期間が経過するまで水位
センサによる水位検出動作を停止させる水位検出停止部
と；を設けた構成をもって前記課題を解決する手段とし
ている。According to a second aspect of the present invention, there is provided a hot water supply heat exchanger for heating water supplied from a water supply passage and sending it out to the hot water supply passage, and a circulating hot water circulating in the additional heating circulation passage incorporated in the bath tub hot water circulation passage. And a water level sensor that is disposed in the reheating circulation passage or a communication passage communicating with the reheating heating circulation passage and that detects the level of the hot water in the bathtub by water pressure. The unit and the reheating heat exchanger are integrated, a common burner for heating the integrated hot water supply heat exchanger and the reheating heat exchanger, and a combustion fan for supplying and exhausting the burner are provided. In a one-can, two-channel water heater in which a water level detection operation is performed by the water level sensor at a predetermined timing, a one-can, two-channel bath water heater performs only a hot water supply operation without performing a reheating operation. A hot water supply independent operation monitoring unit that monitors whether or not the operation is being performed; a fan drive unit that continuously drives the combustion fan to cool the reheating heat exchanger after the stop of the hot water supply independent operation; Until the direct detection value that directly detects the water temperature at the position where the sensor is disposed or the estimated detection value that estimates and detects the water temperature at the position where the water level sensor is disposed reaches a predetermined threshold value, or And a water level detection stop unit for stopping the water level detection operation by the water level sensor until a predetermined allowance period elapses after reaching the predetermined time period.
【００３６】第３の発明は、上記第１又は第２の発明を
構成する水位センサの配設位置の水温を直接的に検出す
る手段は追い焚き循環通路温度センサによって構成さ
れ、水位センサの配設位置の水温を推定検出する手段
は、給湯単独運転が行われている給湯単独運転時間と、
給湯単独運転の燃焼運転情報とを少なくともパラメータ
にして求められる追い焚き熱交換器の保有熱量に基づき
水位センサの配設位置の水温を推定検出する保有熱量検
出手段、あるいは、一缶二水路風呂給湯器の給気温に基
づき水位センサの配設位置の水温を推定検出する給気温
検出手段、あるいは、上記追い焚き熱交換器の保有熱量
と給気温を組み合わせて水位センサの配設位置の水温を
推定検出する保有熱量・給気温検出手段のうちのいずれ
か１つの手段により構成されている構成をもって前記課
題を解決する手段としている。According to a third aspect of the present invention, the means for directly detecting the water temperature at the position where the water level sensor according to the first or second aspect is provided is constituted by a reheating circulation passage temperature sensor. The means for estimating and detecting the water temperature at the installation position includes:
Heating amount detection means for estimating and detecting the water temperature at the position of the water level sensor based on the heat amount of the reheating heat exchanger obtained using at least the combustion operation information of the hot water supply alone operation as a parameter, or a one-can two-channel bath hot water supply Supply temperature detecting means for estimating and detecting the water temperature at the position of the water level sensor based on the supply temperature of the heat exchanger, or estimating the water temperature at the position of the water level sensor by combining the amount of heat retained by the reheating heat exchanger and the supply temperature Means for solving the above-mentioned problem is a configuration constituted by any one of the stored heat quantity / supply temperature detection means.
【００３７】第４の発明は、給水通路から供給される水
を加熱して給湯通路へ送出する給湯熱交換器と、浴槽湯
水の追い焚き循環通路に組み込まれ追い焚き循環通路を
循環する循環湯水の追い焚きを行う追い焚き熱交換器
と、追い焚き循環通路又は追い焚き循環通路に連通する
連通通路に配設され浴槽の湯水の水位を水圧により検出
する水位センサとを備え、上記給湯熱交換器と追い焚き
熱交換器は一体化され、この一体化された給湯熱交換器
と追い焚き熱交換器を加熱する共通のバーナーと、該バ
ーナーへの給排気を行う燃焼ファンとが設けられ、予め
定められたタイミングで上記水位センサによる水位検出
動作が行われる一缶二水路タイプの風呂給湯器におい
て、一缶二水路風呂給湯器が追い焚き運転を行わず給湯
運転だけを行う給湯単独運転を行っているか否かを監視
する給湯単独運転監視部と；給湯単独運転の停止後に予
め定めたファン駆動延長時間を経過するまで燃焼ファン
を継続駆動させるファン駆動部と；給湯単独運転の停止
後に燃焼ファンの駆動が停止されるまで、又は、停止さ
れてから予め定めた余裕期間を経過するまで水位センサ
による水位検出動作を停止させる水位検出停止部と；を
設けた構成をもって前記課題を解決する手段としてい
る。A fourth aspect of the present invention relates to a hot water supply heat exchanger for heating water supplied from a water supply passage and sending it out to the hot water supply passage, and a circulating hot water circulating in the additional heating circulation passage incorporated in the bath tub hot water circulation passage. And a water level sensor that is disposed in the reheating circulation passage or a communication passage communicating with the reheating heating circulation passage and that detects the level of the hot water in the bathtub by water pressure. The unit and the reheating heat exchanger are integrated, a common burner for heating the integrated hot water supply heat exchanger and the reheating heat exchanger, and a combustion fan for supplying and exhausting the burner are provided. In a one-can, two-channel water heater in which a water level detection operation is performed by the water level sensor at a predetermined timing, a one-can, two-channel bath water heater performs only a hot water supply operation without performing a reheating operation. A single hot water supply operation monitoring unit that monitors whether or not the operation is being performed; a fan drive unit that continuously drives the combustion fan until a predetermined fan drive extension time elapses after the single hot water supply operation is stopped; A water level detection stop unit that stops the water level detection operation by the water level sensor until the drive of the combustion fan is stopped later or until a predetermined margin period elapses after the stoppage. Means to do that.
【００３８】第５の発明は、上記第４の発明の構成に加
えて、一缶二水路風呂給湯器の給気温を検出する給気温
センサが設けられており、給気温センサが検出する給気
温に基づいてファン駆動延長時間を設定するファン駆動
延長時間データが与えられ、上記給気温センサが検出す
る給気温に応じてファン駆動延長時間を可変設定する延
長時間設定部を設けた構成をもって前記課題を解決する
手段としている。According to a fifth aspect of the present invention, in addition to the configuration of the fourth aspect of the invention, an air temperature sensor for detecting the air temperature of the one-can-two-channel bath water heater is provided, and the air temperature sensor detected by the air temperature sensor is provided. The fan drive extension time data for setting the fan drive extension time based on the above is provided, and the configuration is provided with an extension time setting unit that variably sets the fan drive extension time according to the supply air temperature detected by the supply air temperature sensor. Is a means to solve.
【００３９】第６の発明は、上記第４の発明の構成に加
えて、一缶二水路風呂給湯器が給湯単独運転を行ってい
る時間を計測する時間計測手段と；少なくとも給湯単独
運転の燃焼熱量情報と給湯単独運転時間をパラメータと
して給湯単独運転によるバーナーの燃焼熱により追い焚
き熱交換器に与えられる追い焚き熱交換器の保有熱量を
求める保有熱量データが与えられ、該保有熱量データを
求めるための前記給湯単独運転時のパラメータ情報を取
り込んで前記保有熱量データから追い焚き熱交換器の保
有熱量を求め、該保有熱量に応じたファン駆動延長時間
を可変設定する延長時間設定部を設けた構成をもって前
記課題を解決する手段としている。In a sixth aspect of the present invention, in addition to the configuration of the fourth aspect of the present invention, a time measuring means for measuring a time during which the one-can-two-channel bath water heater performs the hot-water sole operation; The retained calorie data for obtaining the retained calorie of the reburning heat exchanger given to the reburning heat exchanger by the combustion heat of the burner in the solely hot water supply operation with the calorie information and the hot water single operation time as parameters are given, and the retained calorie data is obtained. An extension time setting unit for fetching the parameter information at the time of the single operation of the hot water supply alone, obtaining the retained heat amount of the reheating heat exchanger from the retained heat amount data, and variably setting the fan drive extension time according to the retained heat amount is provided. The configuration is a means for solving the above problem.
【００４０】上記構成の発明において、例えば、給湯単
独運転監視部は一缶二水路風呂給湯器が給湯単独運転を
行っているか否かを監視し、この給湯単独運転監視部の
監視情報により給湯単独運転が終了したと検知したとき
から、水位センサ配設位置の水温の直接検出値又は推定
検出値がしきい値に達するまで、あるいは、上記直接検
出値又は推定検出値がしきい値に達してから予め定めた
余裕期間を経過するまで、あるいは、燃焼ファンの駆動
が停止するまで、あるいは、燃焼ファンの駆動が停止し
てから予め定めた余裕期間を経過するまで、水位検出停
止部は水位センサによる水位検出動作を停止させる。In the invention having the above-mentioned structure, for example, the hot-water supply independent operation monitoring unit monitors whether the one-can-two-channel bath water heater is performing the hot-water supply independent operation. From the time when it is detected that the operation has been completed, until the direct detection value or the estimated detection value of the water temperature at the position of the water level sensor reaches the threshold value, or when the direct detection value or the estimated detection value reaches the threshold value. Until a predetermined margin period elapses, or until the driving of the combustion fan is stopped, or until a predetermined margin period elapses after the driving of the combustion fan is stopped, the water level detection stop unit is a water level sensor. Stops the water level detection operation.
【００４１】上記給湯単独運転後に上記直接検出値又は
推定検出値がしきい値に達したとき、あるいは、上記直
接検出値又は推定検出値がしきい値に達してから余裕期
間が経過したとき、あるいは、給湯単独運転後に燃焼フ
ァンが停止したとき、あるいは、燃焼ファンが停止して
から予め定めた余裕期間が経過したときには、給湯単独
運転により高温になっていた追い焚き熱交換器の湯水温
が冷却して湯水の対流が収まり、かつ、追い焚き循環通
路や該追い焚き循環通路に連通する連通通路の湯水が冷
却して水位センサのセンサ出力が安定するので、上記の
ように、給湯単独運転後に上記直接検出値又は推定検出
値がしきい値に達するまで、あるいは、上記直接検出値
又は推定検出値がしきい値に達してから余裕期間が経過
するまで、あるいは、給湯単独運転後に燃焼ファンが停
止するまで、あるいは、燃焼ファンが停止してから予め
定めた余裕期間が経過するまで水位センサによる水位検
出動作を停止させることにより、給湯単独運転に起因し
て不規則変動する水位センサのセンサ出力により不正確
な浴槽水位が検出されるのを回避することが可能で、不
正確な検出浴槽水位による器具運転の誤動作が防止され
る。When the direct detection value or the estimated detection value reaches the threshold value after the hot water supply alone operation, or when the allowance period elapses after the direct detection value or the estimated detection value reaches the threshold value, Alternatively, when the combustion fan is stopped after the hot water supply operation alone, or when a predetermined margin period has elapsed since the combustion fan was stopped, the temperature of the hot water in the reheating heat exchanger, which has been high due to the hot water supply operation alone, is reduced. As the convection of the hot water is cooled down and the hot water in the additional heating circulation passage and the communication passage communicating with the additional heating circulation passage is cooled and the sensor output of the water level sensor is stabilized, the hot water supply alone operation is performed as described above. Later, until the direct detection value or the estimated detection value reaches the threshold value, or until the allowance period elapses after the direct detection value or the estimated detection value reaches the threshold value, or By stopping the water level detection operation by the water level sensor until the combustion fan stops after the hot water supply alone operation or until a predetermined margin period elapses after the combustion fan is stopped, the malfunction caused by the hot water supply alone operation is prevented. An inaccurate bathtub level can be prevented from being detected by the sensor output of the regularly varying water level sensor, and malfunction of the appliance operation due to the inaccurate detected bathtub level can be prevented.
【００４２】[0042]
【発明の実施の形態】以下に、この発明の実施形態例を
図面に基づき説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００４３】第１の実施形態例の一缶二水路風呂給湯器
は前記図７に示すシステム構成を有し、図１にはこの実
施形態例において特徴的な制御構成を示すブロック構成
が表されている。なお、図７に示すシステム構成は前述
したのでその重複説明は省略する。The one-can-two-channel bath water heater of the first embodiment has the system configuration shown in FIG. 7, and FIG. 1 shows a block configuration showing a characteristic control configuration in this embodiment. ing. Since the system configuration shown in FIG. 7 has been described above, a duplicate description thereof will be omitted.
【００４４】この実施形態例において特徴的な制御装置
４０は、図１に示すように、燃焼運転制御部４３と、給
湯単独運転監視部４４と、データ格納部４６と、ファン
駆動部４７と、水位検出停止部４８とを有して構成され
ている。As shown in FIG. 1, a characteristic control device 40 of this embodiment includes a combustion operation control section 43, a hot water supply independent operation monitoring section 44, a data storage section 46, a fan drive section 47, And a water level detection stop unit 48.
【００４５】上記燃焼運転制御部４３には給湯や自動運
転等の各種の運転モードのシーケンスプログラムが予め
定め与えられており、前記シーケンスプログラムに従っ
て各種のセンサ出力やリモコン４１の情報等を取り込ん
で、各種の運転モードの動作を行う。A sequence program of various operation modes such as hot water supply and automatic operation is given to the combustion operation control section 43 in advance. According to the sequence program, various sensor outputs and information of the remote controller 41 are taken in. Performs operation in various operation modes.
【００４６】前記給湯単独運転監視部４４は、上記燃焼
運転制御部４３の運転動作の情報を取り込み、この情報
に基づき、注湯制御弁２６が閉状態であり、かつ、水流
センサ３６が追い焚き循環通路２４内の通水を検知して
おらず、かつ、水量センサ３１が給水通路１３内の通水
を検知しているときには、給湯単独運転が行われている
と検知し、それ以外のときには給湯単独運転が行われて
いないと検知して給湯単独運転が行われているか否かを
監視する。The hot water supply independent operation monitoring unit 44 takes in the operation information of the combustion operation control unit 43, and based on this information, the pouring control valve 26 is closed, and the water flow sensor 36 turns on When the water supply in the circulation passage 24 is not detected and the water amount sensor 31 detects the water supply in the water supply passage 13, it is detected that the hot water supply alone operation is being performed. It detects that the hot water supply independent operation is not performed, and monitors whether the hot water supply independent operation is performed.
【００４７】ファン駆動部４７は、燃焼運転制御部４３
の運転動作情報を取り込み、燃焼運転制御部４３がファ
ン駆動の指令を出力したときに、燃焼ファン７を回転駆
動させ、燃焼運転制御部４３がファン停止の指令を出力
したときに燃焼ファン７を停止させる。この実施形態例
では、バーナー２の燃焼停止後に燃焼室１内の排気ガス
を排出させるために燃焼ファン７を継続駆動させるため
のファン駆動延長時間であるポストパージ期間（例え
ば、５分間）がデータ格納部４６に与えられており、燃
焼運転制御部４３はバーナー２の燃焼を停止させた後に
上記ポストパージ期間（ファン駆動延長時間）が終了し
たときに、燃焼ファン７の停止指令をファン駆動部４７
に出力し、ファン駆動部４７はこの停止指令を受けて燃
焼ファン７の駆動を停止する。そうすることにより、バ
ーナー２の燃焼停止後に燃焼室１内の排気ガスをほぼ外
部へ排出することができる。The fan drive unit 47 includes a combustion operation control unit 43
When the combustion operation control section 43 outputs a fan drive command, the combustion fan 7 is driven to rotate. When the combustion operation control section 43 outputs a fan stop command, the combustion fan 7 is turned on. Stop. In this embodiment, the post-purge period (for example, 5 minutes), which is a fan drive extension time for continuously driving the combustion fan 7 to discharge the exhaust gas in the combustion chamber 1 after the combustion of the burner 2 is stopped, is data. When the post-purge period (fan drive extension time) ends after the combustion of the burner 2 is stopped, the combustion operation control unit 43 sends a stop command for the combustion fan 7 to the fan drive unit. 47
And the fan drive unit 47 stops driving the combustion fan 7 in response to the stop command. By doing so, the exhaust gas in the combustion chamber 1 can be substantially discharged to the outside after the burner 2 stops burning.
【００４８】データ格納部４６には、さらに、予め定め
たしきい値温度Ｔsp（例えば、４８℃）が格納されてい
る。このしきい値温度Ｔspは、水位センサ２８に予め定
められる保証温度に基づき設定されるもので、この実施
形態例では、水位センサ２８の保証温度範囲内の上限値
がしきい値温度Ｔspとしてデータ格納部４６に与えられ
ている。The data storage section 46 further stores a predetermined threshold temperature Tsp (for example, 48 ° C.). The threshold temperature Tsp is set based on a guaranteed temperature predetermined for the water level sensor 28. In this embodiment, the upper limit value within the guaranteed temperature range of the water level sensor 28 is set as the threshold temperature Tsp. It is provided to the storage unit 46.
【００４９】水位検出停止部４８は、前記給湯単独運転
監視部４４の監視情報を取り込んで、この情報に基づき
一缶二水路風呂給湯器（器具）が給湯単独運転を開始し
たと検知したときに水位センサ２８による水位検出動作
を停止させる水位検出停止指令信号の出力を開始する。
この指令信号は燃焼運転制御部４３に出力され、燃焼運
転制御部４３は、湯張りモードや保水モード等の水位セ
ンサ２８による水位検出動作を伴う運転モードの運転中
に給湯割り込みが行われて給湯単独運転が行われる場合
には、上記水位検出停止指令信号を受けて、水位センサ
２８による水位検出動作を停止する。The water level detection stop unit 48 takes in the monitoring information of the hot water supply independent operation monitoring unit 44 and, when it detects that the one-can-two-channel bath water heater (apparatus) has started the hot water supply independent operation based on this information. The output of the water level detection stop command signal for stopping the water level detection operation by the water level sensor 28 is started.
This command signal is output to the combustion operation control unit 43, and the combustion operation control unit 43 performs a hot water supply interrupt during operation in an operation mode involving a water level detection operation by the water level sensor 28, such as a hot water filling mode or a water retention mode. When the islanding operation is performed, the water level detection operation by the water level sensor 28 is stopped in response to the water level detection stop command signal.
【００５０】その後、給湯単独運転が停止すると、上記
水位検出停止部４８は、データ格納部４６から上記しき
い値温度Ｔspを取り込むと共に、風呂温度センサ３７が
検出出力したセンサ出力を直接検出値である検出湯水温
として該風呂温度センサ３７の検出湯水温の取り込みを
開始し、上記しきい値温度Ｔspと風呂温度センサ３７の
検出湯水温を比較する。この比較により、上記風呂温度
センサ３７の検出湯水温がしきい値温度Ｔspよりも高温
であると判断したときには、水位検出停止部４８は上記
水位検出停止指令信号の出力を継続して行う。Thereafter, when the hot water supply alone operation is stopped, the water level detection stop unit 48 fetches the threshold temperature Tsp from the data storage unit 46 and directly outputs the sensor output detected by the bath temperature sensor 37 as a detected value. As a certain detected hot water temperature, taking in of the hot water temperature detected by the bath temperature sensor 37 is started, and the threshold temperature Tsp is compared with the hot water temperature detected by the bath temperature sensor 37. By this comparison, when it is determined that the detected hot and cold water temperature of the bath temperature sensor 37 is higher than the threshold temperature Tsp, the water level detection stop unit 48 continuously outputs the water level detection stop command signal.
【００５１】それというのは、風呂温度センサ３７が設
けられている場所は水位センサ２８が配設されている場
所に近く、風呂温度センサ３７が検出する温度は水位セ
ンサ２８が配設されている場所の湯水温とほぼ等しいと
考えられることから、風呂温度センサ３７の検出湯水温
がしきい値温度Ｔsp（この実施形態例ではしきい値温度
Ｔspは前記の如く水位センサ２８の保証温度の上限値）
よりも高温であるということは、水位センサ２８の配設
位置の湯水温が水位センサ２８の保証温度範囲を越えて
高温であると判断され、かつ、追い焚き熱交換器４内の
湯水温はより高温で対流現象が抑制されていないと判断
されて、前記水位センサ２８の温度依存性と追い焚き熱
交換器４の高温湯水による対流現象の発生との相乗関与
により水位センサ２８のセンサ出力が不規則に変動して
いるために正確な浴槽水位を検出することができないと
判断されるからである。That is, the location where the bath temperature sensor 37 is provided is close to the location where the water level sensor 28 is provided, and the temperature detected by the bath temperature sensor 37 is provided with the water level sensor 28. Since it is considered that the temperature is substantially equal to the temperature of the hot water at the place, the temperature of the hot water detected by the bath temperature sensor 37 is equal to the threshold temperature Tsp (in this embodiment, the threshold temperature Tsp is the upper limit of the guaranteed temperature of the water level sensor 28 as described above). value)
It is determined that the hot water temperature at the position where the water level sensor 28 is disposed is higher than the guaranteed temperature range of the water level sensor 28, and the hot water temperature in the reheating heat exchanger 4 is higher. It is determined that the convection phenomenon is not suppressed at a higher temperature, and the sensor output of the water level sensor 28 is increased due to the synergistic involvement of the temperature dependency of the water level sensor 28 and the occurrence of the convection phenomenon due to the hot water in the reheating heat exchanger 4. This is because it is determined that accurate bathtub water level cannot be detected due to irregular fluctuations.
【００５２】給湯単独運転の停止後、時間の経過と共に
追い焚き循環通路２４と湯張り通路２５内の湯水温は低
下し、このことにより、風呂温度センサ３７の検出湯水
温が低下して風呂温度センサ３７の検出湯水温が前記し
きい値温度Ｔsp以下に低下したときに、水位センサ２８
の配設位置の湯水温が水位センサ２８の保証温度範囲内
の湯水温に低下し、かつ、追い焚き熱交換器４内の湯水
の対流現象が抑制されたと判断し、水位センサ２８のセ
ンサ出力が安定して水位センサ２８による正確な浴槽水
位検出を行うことが可能となったとして、水位検出停止
部４８は燃焼運転制御部４３への水位検出停止信号の出
力を停止する。After the hot water supply operation is stopped, the temperature of the hot water in the additional heating circulation passage 24 and the hot water filling passage 25 decreases with the passage of time. As a result, the temperature of the hot water detected by the bath temperature sensor 37 decreases and the bath temperature decreases. When the detected hot water temperature of the sensor 37 falls below the threshold temperature Tsp, the water level sensor 28
It is determined that the temperature of the hot water at the disposition position has dropped to the temperature within the guaranteed temperature range of the water level sensor 28, and that the convection phenomenon of the hot water in the reheating heat exchanger 4 has been suppressed. The water level detection stop unit 48 stops outputting the water level detection stop signal to the combustion operation control unit 43, assuming that the water level sensor 28 can stably and accurately detect the bathtub water level.
【００５３】この実施形態例によれば、給湯単独運転監
視部４４と水位検出停止部４８を設けたので、給湯単独
運転中と、給湯単独運転後に風呂温度センサ３７の検出
湯水温がしきい値温度Ｔsp以下に低下するまで、水位セ
ンサ２８による水位検出動作を停止させることができ
る。このことにより、水位センサ２８の配設位置の湯水
温が保証温度範囲を越えて高温であり、水位センサ２８
のセンサ出力が大きな温度依存性でもってシフトすると
共に、追い焚き熱交換器４の高温加熱の湯水による対流
現象の発生により水位センサ２８のセンサ出力が不規則
に振動している期間には、水位センサ２８による水位検
出動作が行われないことになり、上記水位センサ２８の
温度依存性と追い焚き熱交換器４内の湯水の対流現象の
発生との相乗関与による水位センサ２８のセンサ出力の
不規則変動に起因して不正確な浴槽水位が検出され、こ
の不正確な浴槽水位に基づいて器具運転が行われること
による器具運転の誤動作を確実に回避することができ
る。According to this embodiment, since the hot water supply independent operation monitoring section 44 and the water level detection stop section 48 are provided, the hot water temperature detected by the bath temperature sensor 37 during the hot water supply independent operation and after the hot water supply alone operation is set to the threshold value. Until the temperature drops below the temperature Tsp, the operation of detecting the water level by the water level sensor 28 can be stopped. As a result, the temperature of the hot water at the position where the water level sensor 28 is disposed is higher than the guaranteed temperature range and is high.
During the period in which the sensor output of the water level sensor 28 oscillates irregularly due to the occurrence of a convection phenomenon due to the hot water of the reheating heat exchanger 4 while the sensor output of the Since the water level detection operation by the sensor 28 is not performed, the sensor output of the water level sensor 28 is not improved due to the synergistic involvement of the temperature dependency of the water level sensor 28 and the occurrence of the convection phenomenon of the hot and cold water in the reheating heat exchanger 4. An incorrect bathtub water level is detected due to a rule change, and a malfunction of the appliance operation due to the appliance operation being performed based on the incorrect bathtub water level can be reliably avoided.
【００５４】また、給湯単独運転後に燃焼ファン７の継
続駆動が行われるので、燃焼ファン７の駆動による給気
の通風が燃焼室１内に生じて追い焚き熱交換器４を強制
的に冷却し、給湯単独運転後に燃焼ファン７を駆動させ
ない場合に比べて、早く追い焚き熱交換器４が冷却さ
れ、追い焚き熱交換器４の湯水を早く冷ますことがで
き、追い焚き熱交換器４の湯水の対流現象の抑制と水位
センサ２８の配設位置の湯水温の低下を早めることが可
能である。Further, since the combustion fan 7 is continuously driven after the hot water supply operation alone, the ventilation of the supply air by the driving of the combustion fan 7 is generated in the combustion chamber 1 to forcibly cool the reheating heat exchanger 4. As compared with the case where the combustion fan 7 is not driven after the hot water supply alone operation, the reheating heat exchanger 4 is cooled earlier, and the hot water of the reheating heat exchanger 4 can be cooled earlier. It is possible to suppress the convection phenomenon of the hot water and quickly lower the hot water temperature at the position where the water level sensor 28 is disposed.
【００５５】もちろん、この実施形態例では、給湯単独
運転後に風呂温度センサ３７の検出湯温がしきい値温度
Ｔspに低下したときに水位センサ２８による水位検出停
止動作を終了させるので、上記の如く、給湯単独運転後
に燃焼ファン７の継続駆動を行うことにより給湯単独運
転後に水位センサ２８のセンサ出力を早く安定させるこ
とができて、給湯単独運転後に燃焼ファン７の継続駆動
が停止する前（ポストパージ期間が終了する前）に、短
時間で、水位検出停止動作を終了させることが可能であ
る。Needless to say, in this embodiment, when the detected hot water temperature of the bath temperature sensor 37 drops to the threshold temperature Tsp after the hot water supply alone operation, the operation of stopping the water level detection by the water level sensor 28 is terminated, as described above. By continuously driving the combustion fan 7 after the hot water supply operation alone, the sensor output of the water level sensor 28 can be quickly stabilized after the hot water supply operation only, and before the continuous driving of the combustion fan 7 is stopped after the hot water supply operation (post Before the purge period ends), the water level detection stop operation can be ended in a short time.
【００５６】図２には第２の実施形態例において特徴的
な制御構成を示すブロック構成図が実線により示されて
いる。この第２の実施形態例が前記第１の実施形態例と
異なる特徴的なことは、給湯単独運転後に水位検出停止
動作を終了させるタイミングを風呂温度センサ３７の検
出湯水温に基づいて決定するのではなく、給湯単独運転
後に燃焼ファン７の停止に同期させて水位検出停止動作
を終了させる構成としたことであり、上記水位検出停止
部４８以外の構成は前記第１の実施形態例と同様であ
る。なお、この実施形態例では、前記第１の実施形態例
と同一名称部分には同一符号を付し、上記の如く、水位
検出停止部４８以外の構成部分は前記第１の実施形態例
と同様であるので、その重複説明は省略する。FIG. 2 is a block diagram showing a characteristic control configuration in the second embodiment by solid lines. The second embodiment is different from the first embodiment in that the timing for terminating the water level detection stop operation after the single hot water supply operation is determined based on the detected hot and cold water temperature of the bath temperature sensor 37. Instead, the configuration is such that the water level detection stop operation is ended in synchronization with the stop of the combustion fan 7 after the hot water supply alone operation, and the configuration other than the water level detection stop section 48 is the same as that of the first embodiment. is there. In this embodiment, the same reference numerals are given to the same parts as those in the first embodiment, and as described above, the components other than the water level detection stop unit 48 are the same as those in the first embodiment. Therefore, the overlapping description is omitted.
【００５７】水位検出停止部４８は、給湯単独運転監視
部４４の監視情報を取り込んで、この情報により器具が
給湯単独運転を開始したと検知したときに、燃焼運転制
御部４３へ水位検出停止信号の出力を開始する。燃焼運
転制御部４３は上記水位検出停止信号を受けて、湯張り
モードや保水モード等の水位センサ２８による水位検出
動作を停止する。The water level detection stop section 48 receives the monitoring information of the hot water supply independent operation monitoring section 44, and when detecting that the appliance has started the hot water supply independent operation based on this information, sends a water level detection stop signal to the combustion operation control section 43. Start output of Upon receiving the above-mentioned water level detection stop signal, the combustion operation control unit 43 stops the water level detection operation by the water level sensor 28 in the hot water filling mode, the water retention mode, or the like.
【００５８】給湯単独運転の停止後、水位検出停止部４
８は、燃焼運転制御部４３とファン駆動部４７のどちら
か一方又は両方の情報を取り込んで、この取り込んだ情
報により燃焼ファン７の停止を検知したときに、次のよ
うな理由により水位検出停止信号の燃焼運転制御部４３
への出力を停止する。After stopping the hot water supply independent operation, the water level detection stop unit 4
8 fetches information of one or both of the combustion operation control unit 43 and the fan drive unit 47, and when the stop of the combustion fan 7 is detected based on the fetched information, the water level detection stop is performed for the following reason. Signal combustion operation control unit 43
Stop output to.
【００５９】バーナー２の燃焼停止後のポストパージ期
間に燃焼ファン７が継続駆動することにより、燃焼室１
内には外部から取り込まれた給気による通風が生じてお
り、この通風により給湯熱交換器３と追い焚き熱交換器
４は強制的に冷やされて追い焚き熱交換器４内の湯水温
が低下する。この追い焚き熱交換器４内の湯水の冷却に
伴って、追い焚き循環通路２４と湯張り通路２５内の湯
水温も低下し、かつ、追い焚き熱交換器４内の湯水温の
対流現象が抑制されて追い焚き循環通路２４と湯張り通
路２５内の湯水の不規則振動が収まるので、前記ポスト
パージ期間が経過する頃には、水位センサ２８が配設さ
れている配設位置の湯水温が水位センサ２８の保証温度
範囲内の湯水に低下し、かつ、水位センサ２８の配設位
置の湯水の不規則振動がなくなっていると考えられる。The combustion fan 7 is continuously driven during the post-purge period after the combustion of the burner 2 is stopped.
Ventilation occurs due to air supply taken in from the outside, and the hot water supply heat exchanger 3 and the reheating heat exchanger 4 are forcibly cooled by this ventilation, and the temperature of the hot water in the reheating heat exchanger 4 is reduced. descend. With the cooling of the hot water in the additional heat exchanger 4, the temperature of the hot water in the additional heating circulation passage 24 and the hot water filling passage 25 also decreases, and the convection phenomenon of the hot water temperature in the additional heating heat exchanger 4 decreases. Since the irregular vibration of the hot water in the reheating steam circulation passage 24 and the hot water filling passage 25 is suppressed, the temperature of the hot water at the installation position where the water level sensor 28 is installed is around the end of the post-purge period. It is considered that the water temperature drops to the temperature within the guaranteed temperature range of the water level sensor 28, and the irregular vibration of the water at the position where the water level sensor 28 is disposed is eliminated.
【００６０】このことから、上記の如く、給湯単独運転
後に燃焼ファン７の駆動が停止されたときには水位セン
サ２８の配設位置の湯水温は水位センサ２８の保証温度
に低下し、かつ、水位センサ２８の配設位置の湯水の不
規則振動がなくなって水位センサ２８のセンサ出力が安
定していると判断し水位センサ２８により正確な浴槽水
位を検出することができるとして、水位検出停止部４８
は燃焼運転制御部４３への水位検出停止信号の出力を停
止する。この水位検出停止信号の出力停止により燃焼運
転制御部４３は水位センサ２８による水位検出動作を再
開することが可能である。Therefore, as described above, when the operation of the combustion fan 7 is stopped after the hot water supply operation alone, the temperature of the hot water at the position where the water level sensor 28 is disposed drops to the guaranteed temperature of the water level sensor 28 and the water level sensor 28 It is determined that the irregular vibration of the hot and cold water at the disposition position of 28 has disappeared and the sensor output of the water level sensor 28 is stable, and the water level sensor 28 can accurately detect the bathtub water level.
Stops the output of the water level detection stop signal to the combustion operation control unit 43. By stopping the output of the water level detection stop signal, the combustion operation control unit 43 can restart the water level detection operation by the water level sensor 28.
【００６１】この実施形態例によれば、水位検出停止部
４８は、給湯単独運転中と給湯単独運転後に燃焼ファン
７の駆動が停止されるまで、水位センサ２８による水位
検出動作を停止させる構成にしたので、給湯単独運転に
起因して水位センサ２８のセンサ出力が不規則に変動す
ると考えられる期間、水位センサ２８による水位検出動
作を停止させることができる。このことから、上記水位
センサ２８のセンサ出力の不規則変動に起因して不正確
な浴槽水位が検出され、この不正確な浴槽水位に基づい
て器具運転が行われることによる器具運転の誤動作を回
避することができる。According to this embodiment, the water level detection stopping section 48 is configured to stop the water level detection operation by the water level sensor 28 during the hot water supply alone operation and after the hot water supply alone operation until the driving of the combustion fan 7 is stopped. Accordingly, the water level detection operation by the water level sensor 28 can be stopped during a period in which the sensor output of the water level sensor 28 is considered to fluctuate irregularly due to the hot water supply alone operation. From this, an incorrect bathtub water level is detected due to irregular fluctuations in the sensor output of the water level sensor 28, and a malfunction of the appliance operation due to the appliance operation being performed based on the incorrect bathtub water level is avoided. can do.
【００６２】以下に、第３の実施形態例を説明する。こ
の実施形態例において特徴的なことは、図７の点線に示
すように、燃焼ファン７の駆動によりバーナー２へ供給
される給気の温度を検出する給気温センサ２７を給気通
路６やガスノズル１９等に設けると共に、前記第２の実
施形態例に示した制御構成に加えて、図２の点線に示す
ように、給気温に応じて給湯単独運転後のファン駆動延
長時間を可変設定する延長時間設定部５０を設けたこと
である。燃焼運転制御部４３とデータ格納部４６と延長
時間設定部５０以外の構成は前記第２の実施形態例と同
様であり、その共通部分の重複説明は省略する。Hereinafter, a third embodiment will be described. The feature of this embodiment is that, as shown by the dotted line in FIG. 7, the air supply temperature sensor 27 for detecting the temperature of the air supply supplied to the burner 2 by driving the combustion fan 7 is connected to the air supply passage 6 and the gas nozzle. 19, and in addition to the control configuration shown in the second embodiment, as shown by the dotted line in FIG. 2, an extension for variably setting the fan drive extension time after the hot water supply alone operation according to the supply air temperature. That is, a time setting unit 50 is provided. The configuration other than the combustion operation control unit 43, the data storage unit 46, and the extension time setting unit 50 is the same as that of the second embodiment, and the description of the common parts will not be repeated.
【００６３】ところで、給湯単独運転が停止した後の燃
焼ファン７の継続駆動により燃焼室１内に通風が生じて
いる場合に、給気温が低いと、上記通風が追い焚き熱交
換器４から奪う熱量が多くなり、追い焚き熱交換器４が
冷却する速度は早くなる。反対に、給気温が高いと、上
記通風が追い焚き熱交換器４から奪う熱量は少なくな
り、追い焚き熱交換器４の冷却速度は遅くなる。このよ
うに、追い焚き熱交換器４の冷却速度は給気温が低下す
るに従って早くなり、反対に、給気温が高くなるに従っ
て遅くなるというように、給気温により異なる。Incidentally, when ventilation is generated in the combustion chamber 1 by continuous driving of the combustion fan 7 after the hot water supply independent operation is stopped, if the supply air temperature is low, the ventilation takes away from the follow-up heat exchanger 4. The amount of heat increases, and the speed at which the reheating heat exchanger 4 cools increases. Conversely, when the supply air temperature is high, the amount of heat taken from the reheating heat exchanger 4 by the ventilation decreases, and the cooling speed of the reheating heat exchanger 4 decreases. As described above, the cooling rate of the reheating heat exchanger 4 differs depending on the supply air temperature, such as increasing as the supply air temperature decreases, and conversely decreasing as the supply air temperature increases.
【００６４】このため、給湯単独運転後にポストパージ
期間が過ぎても、給気温が高いために追い焚き熱交換器
４内の湯水が冷め切らずに高温で、追い焚き熱交換器４
の高温湯水に起因した対流現象が抑制されておらず、か
つ、水位センサ２８の配設位置の湯水温が水位センサ２
８の保証温度よりも高い場合が生じる。そこで、この実
施形態例では、給気温に応じて給湯単独運転後のファン
駆動延長時間を可変設定する構成とした。For this reason, even after the post-purge period has elapsed after the hot water supply operation alone, the hot water in the reheating heat exchanger 4 has not been completely cooled due to the high supply air temperature, and the reheating heat exchanger 4 has a high temperature.
The convection phenomenon caused by the high-temperature hot and cold water is not suppressed, and the hot water temperature at the position where the water level sensor 28 is disposed is equal to the water level sensor 2.
8 may be higher than the guaranteed temperature. Therefore, in this embodiment, the fan drive extension time after the hot water supply alone operation is variably set according to the supply air temperature.
【００６５】データ格納部４６にはファン駆動延長時間
データが予め実験や演算等により求めて格納されてい
る。このファン駆動延長時間データは、図３の（ａ）や
（ｂ）に示すように、給気温に対応させてファン駆動延
長時間が与えられているもので、この実施形態例では、
給気温が実験や演算等により求められた図３の（ａ）や
（ｂ）に示す給気温Ｔa未満の場合には、ファン駆動延
長時間は予め定められるポストパージ期間に一定であ
り、給気温Ｔa以上の場合には給気温が高くなるに従っ
てファン駆動延長時間が前記ポストパージ期間から連続
的又は段階的に長くなる。The data storage section 46 stores fan drive extension time data obtained in advance through experiments, calculations and the like. As shown in FIGS. 3A and 3B, the fan drive extension time data is provided with the fan drive extension time corresponding to the supply air temperature. In this embodiment,
When the supply air temperature is less than the supply air temperature Ta shown in FIGS. 3A and 3B obtained by experiments, calculations, or the like, the fan drive extension time is constant during a predetermined post-purge period. When the temperature is equal to or higher than Ta, the fan drive extension time increases continuously or stepwise from the post-purge period as the supply air temperature increases.
【００６６】また、データ格納部４６には、給湯単独運
転によるバーナー２の燃焼が停止した後に燃焼ファン７
を継続駆動させるためのファン駆動延長時間と、給湯単
独運転以外の運転によるバーナー２の燃焼が停止した後
に、燃焼ファン７を継続駆動させるためのポストパージ
期間とがそれぞれ別個に格納されており、この実施形態
例では、燃焼運転制御部４３は、給湯単独運転のバーナ
ー２の燃焼停止後には上記ファン駆動延長時間が終了す
るまで燃焼ファン７を継続駆動させ、給湯単独運転以外
の運転のバーナー２の燃焼停止後には上記ポストパージ
期間が終了するまで燃焼ファン７の継続駆動を行わせ
る。The data storage section 46 stores the combustion fan 7 after the combustion of the burner 2 by the hot water supply alone operation is stopped.
And a post-purge period for continuously driving the combustion fan 7 after the combustion of the burner 2 is stopped by an operation other than the hot water supply alone operation, respectively, and is separately stored. In this embodiment, the combustion operation control unit 43 continues driving the combustion fan 7 until the fan drive extension time ends after the combustion of the burner 2 in the hot water supply independent operation is stopped, and the burner 2 in the operation other than the hot water supply alone operation. After the combustion is stopped, the combustion fan 7 is continuously driven until the post-purge period ends.
【００６７】上記延長時間設定部５０は給湯単独運転監
視部４４の監視情報を取り込んで、この情報により給湯
単独運転中と検知したときに、データ格納部４６のファ
ン駆動延長時間データを読み出すと共に、給気温センサ
２７が検出出力するセンサ出力を検出給気温として取り
込む。そして、上記給気温センサ２７の検出給気温に対
応したファン駆動延長時間を前記ファン駆動延長時間デ
ータから求めて設定し、この設定したファン駆動延長時
間をデータ格納部４６のファン駆動延長時間に上書きす
る。The extension time setting section 50 fetches the monitoring information of the hot water supply independent operation monitoring section 44 and, when it is detected from this information that the hot water supply independent operation is being performed, reads out the fan drive extension time data in the data storage section 46 and The sensor output detected and output by the supply air temperature sensor 27 is taken in as the detected supply air temperature. Then, a fan drive extension time corresponding to the detected supply air temperature detected by the supply air temperature sensor 27 is obtained from the fan drive extension time data and set, and the set fan drive extension time is overwritten on the fan drive extension time in the data storage unit 46. I do.
【００６８】燃焼運転制御部４３は給湯単独運転後に上
記データ格納部４６のファン駆動延長時間をデータ格納
部４６から読み出し、このファン駆動延長時間が終了し
たときに、燃焼ファン７の継続駆動により燃焼室１内の
排気ガスがほぼ排出終了したと判断すると共に、追い焚
き熱交換器４内の湯水温が冷却して湯水の対流現象が抑
制され、かつ、水位センサ２８の配設位置の湯水温が水
位センサ２８の保証温度に低下したので、水位センサ２
８のセンサ出力が安定して水位センサ２８による浴槽水
位検出動作により浴槽水位を正確に検出することが可能
となったと判断して、燃焼ファン７の継続駆動を停止さ
せる停止信号をファン駆動部４７へ出力し、ファン駆動
部４７により燃焼ファン７の停止を行わせる。The combustion operation control unit 43 reads the fan drive extension time of the data storage unit 46 from the data storage unit 46 after the hot water supply alone operation, and when the fan drive extension time ends, the combustion fan 7 continues to drive to burn. It is determined that the exhaust gas in the chamber 1 has almost completely been exhausted, and the temperature of the hot water in the reheating heat exchanger 4 is cooled to suppress the convection phenomenon of the hot water, and the hot water temperature at the position where the water level sensor 28 is disposed. Has fallen to the guaranteed temperature of the water level sensor 28,
It is determined that the output of the sensor 8 is stable and that the bath level can be accurately detected by the bath level detection operation by the water level sensor 28, and a stop signal for stopping the continuous driving of the combustion fan 7 is output to the fan drive unit 47. And the combustion drive 7 is stopped by the fan drive unit 47.
【００６９】この実施形態例によれば、延長時間設定部
５０を設けて、給気温に応じてファン駆動延長時間を可
変設定する構成にしたので、給湯単独運転後にポストパ
ージ期間が過ぎても、給気温が高いために水位センサ２
８のセンサ出力が安定しない場合に、給気温に応じてフ
ァン駆動延長時間をポストパージ期間よりも長く設定す
ることができ、ポストパージ期間を越えて燃焼ファン７
をファン駆動延長時間が終了するまで、つまり、追い焚
き熱交換器４内の湯水温が冷却して湯水の対流現象が抑
制され、かつ、水位センサ２８の配設位置の湯水温が水
位センサ２８の保証温度に低下するまで、継続駆動させ
ることができる。According to this embodiment, the extension time setting section 50 is provided to variably set the fan drive extension time according to the supply air temperature. Water level sensor 2 due to high supply air temperature
8 is unstable, the fan drive extension time can be set longer than the post-purge period according to the supply air temperature, and the combustion fan 7 exceeds the post-purge period.
Until the fan drive extension time is over, that is, the temperature of the hot water in the reheating heat exchanger 4 is cooled to suppress the convection phenomenon of the hot water, and the hot water temperature at the position where the water level sensor 28 is disposed is equal to the water level sensor 28. Can be continuously driven until the temperature drops to the guaranteed temperature.
【００７０】この燃焼ファン７の継続駆動により、給気
通風による追い焚き熱交換器４内の湯水の強制冷却を継
続させることができ、通風が停止してしまう場合より
も、追い焚き熱交換器４内の湯水の冷却を早めることが
できる。その上、追い焚き熱交換器４内の湯水温が冷却
して湯水の対流現象が抑制され、かつ、水位センサ２８
の配設位置の湯水温が水位センサ２８の保証温度に低下
して燃焼ファン７が停止するまで、水位センサ２８によ
る水位検出動作が水位検出停止部４８の動作により停止
されているので、前記各実施形態例同様に、水位センサ
２８のセンサ出力の不規則変動に起因した器具運転の誤
動作を防止することができる。By the continuous drive of the combustion fan 7, the forced cooling of the hot water in the reheating heat exchanger 4 by the supply air can be continued, and the reheating of the reheating heat exchanger can be performed as compared with the case where the ventilation is stopped. The cooling of the hot and cold water in 4 can be accelerated. In addition, the temperature of the hot water in the reheating heat exchanger 4 is cooled, the convection phenomenon of the hot water is suppressed, and the water level sensor 28
Since the water level detection operation by the water level sensor 28 is stopped by the operation of the water level detection stop unit 48 until the temperature of the hot water at the disposition position is reduced to the guaranteed temperature of the water level sensor 28 and the combustion fan 7 is stopped, As in the case of the embodiment, it is possible to prevent the malfunction of the appliance operation caused by the irregular fluctuation of the sensor output of the water level sensor 28.
【００７１】もちろん、給気温が高くても、殆どの場
合、給湯単独運転後にポストパージ期間を経過する頃に
は、燃焼ファン７の駆動による給気通風により、湯水の
対流現象はほぼ抑制され、かつ、水位センサ２８の配設
位置の湯水温は水位センサ２８の保証温度に近く低下す
るので、水位センサ２８のセンサ出力はほぼ安定する。
このことから、給気温に関係なく、給湯単独運転後にポ
ストパージ期間の終了と共に、燃焼ファン７の駆動を停
止させ、水位センサ２８による水位検出動作を再開させ
ても器具運転が誤動作するのをほぼ回避することが可能
である。Of course, even when the supply air temperature is high, in most cases, when the post-purge period elapses after the hot water supply operation alone, the convection phenomenon of the hot and cold water is almost suppressed by the supply air ventilation by the driving of the combustion fan 7. In addition, since the temperature of the hot water at the position where the water level sensor 28 is disposed drops close to the guaranteed temperature of the water level sensor 28, the sensor output of the water level sensor 28 becomes almost stable.
From this, regardless of the hot water supply temperature, even when the post-purge period ends and the driving of the combustion fan 7 is stopped and the water level detection operation by the water level sensor 28 is restarted after the hot water supply alone operation, the appliance operation almost does not malfunction. It is possible to avoid.
【００７２】以下に、第４の実施形態例を説明する。こ
の実施形態例において特徴的なことは、図４に示すよう
に、延長時間設定部５０と時間計測部５１と保有熱量検
出部５２を設けて、給湯単独運転により追い焚き熱交換
器４に与えられた保有熱量を求め、該保有熱量に応じて
ファン駆動延長時間を可変設定する構成にしたことであ
る。それ以外の構成は前記各実施形態例と同様であり、
その共通部分の重複説明は省略する。なお、図４では、
前記各実施形態例に示した燃焼運転制御部４３と給湯単
独運転監視部４４とファン駆動部４７と水位検出停止部
４８の図示が省略されている。Hereinafter, a fourth embodiment will be described. What is characteristic in this embodiment is that, as shown in FIG. 4, an extended time setting unit 50, a time measuring unit 51, and a retained calorie detecting unit 52 are provided, and supplied to the reheating heat exchanger 4 by the hot water supply alone operation. The obtained retained heat amount is obtained, and the fan drive extension time is variably set in accordance with the retained heat amount. Other configurations are the same as those of the above embodiments,
A duplicate description of the common part is omitted. In FIG. 4,
The illustration of the combustion operation control unit 43, the hot water supply independent operation monitoring unit 44, the fan drive unit 47, and the water level detection stop unit 48 shown in the above embodiments is omitted.
【００７３】時間計測部５１は給湯単独運転監視部４４
の情報を取り込んで、この情報により給湯単独運転が開
始されてから給湯単独運転が終了するまでの給湯単独運
転時間を計測する構成を有している。The time measuring section 51 is a hot water supply independent operation monitoring section 44
Of the hot water supply alone operation from the start of the hot water supply independent operation to the end of the hot water supply independent operation based on this information.
【００７４】データ格納部４６にはバーナー２の燃焼に
より追い焚き熱交換器４に与えられる追い焚き熱交換器
４の保有熱量を求める保有熱量データが予め実験や演算
等により求め格納されている。上記保有熱量データは、
図５に示すように、燃焼熱量毎に給湯単独運転時間に対
応させて追い焚き熱交換器４の保有熱量が与えられてい
るもので、各燃焼熱量のデータとも給湯単独運転の開始
時には時間の経過と共に追い焚き熱交換器４の保有熱量
は増加し、その後、追い焚き熱交換器４の保有熱量は飽
和状態となる。In the data storage section 46, retained calorie data for determining the retained calorie of the reheater 4 given to the reheater 4 by the combustion of the burner 2 is obtained in advance by experiments, calculations and the like. The above calorific value data is
As shown in FIG. 5, the amount of heat held by the reheating heat exchanger 4 is given in correspondence with the hot water supply alone operation time for each combustion heat amount. With the passage of time, the retained heat of the reheating heat exchanger 4 increases, and thereafter, the retained heat of the reheat heat exchanger 4 becomes saturated.
【００７５】保有熱量検出部５２は給湯単独運転監視部
４４の監視情報を取り込み、この情報により給湯単独運
転が行われていることを検知すると、燃焼運転制御部４
３からバーナー２の燃焼熱量の情報を給湯単独運転の燃
焼熱量情報として取り込んで、上記データ格納部４６の
保有熱量データの中からバーナー２の燃焼熱量に対応す
るデータを選択して読み込む。そして、給湯単独運転監
視部４４の情報により給湯単独運転が終了したことを検
知すると、前記時間計測部５１が計測した給湯単独運転
時間を取り込んで、この給湯単独運転時間を前記読み込
んだ保有熱量データに照らし合わせて給湯単独運転によ
る追い焚き熱交換器４の保有熱量を求め、この求めた保
有熱量に対応する信号を延長時間設定部５０に出力す
る。The held calorie detecting section 52 fetches the monitoring information of the hot water supply independent operation monitoring section 44, and when it detects that the hot water supply independent operation is being performed based on this information, the combustion operation control section 4
From 3, information on the amount of combustion heat of the burner 2 is fetched as information on the amount of combustion heat of the single hot water supply operation, and data corresponding to the amount of combustion heat of the burner 2 is selected and read from the stored heat amount data in the data storage unit 46. Then, when it is detected from the information of the hot water single operation monitoring unit 44 that the hot water single operation has been completed, the hot water single operation time measured by the time measuring unit 51 is fetched, and the hot water single operation time is read by the stored calorie data. The amount of retained heat of the reheating heat exchanger 4 by the hot water supply alone operation is determined in light of the above, and a signal corresponding to the determined retained amount of heat is output to the extension time setting unit 50.
【００７６】前記データ格納部４６には、さらに、図６
の（ａ）や（ｂ）に示すようなファン駆動延長時間デー
タが格納されている。上記ファン駆動延長時間データは
給湯単独運転により追い焚き熱交換器４に与えられた保
有熱量に応じて給湯単独運転後のファン駆動延長時間を
可変設定するためのデータで、保有熱量に対応させてフ
ァン駆動延長時間が与えられている。この実施形態例で
は、予め実験や演算等により求められた図６の（ａ）や
（ｂ）に示す保有熱量Ｐc未満である場合には、ファン
駆動延長時間はポストパー ジ期間に一定であり、上記
保有熱量Ｐc以上である場合には、追い焚き熱交換器４
の保有熱量が多くなるに従ってファン駆動延長時間が上
記ポストパージ期間から連続的に又は段階的に長くな
る。The data storage unit 46 further stores FIG.
(A) and (b) are stored. The above fan drive extension time data is data for variably setting the fan drive extension time after the hot water supply alone operation according to the retained heat amount given to the reheating heat exchanger 4 by the hot water supply alone operation, and is made to correspond to the retained heat amount. A fan drive extension time is given. In this embodiment, when the heat quantity is less than the retained heat amount Pc shown in FIGS. 6A and 6B obtained in advance by experiments, calculations, or the like, the fan drive extension time is constant during the post-purging period, If the heat quantity is equal to or greater than the retained heat amount Pc, the reheating heat exchanger 4
As the amount of retained heat increases, the fan drive extension time increases continuously or stepwise from the post-purge period.
【００７７】それというのは、追い焚き熱交換器４の保
有熱量が多い場合には、燃焼ファン７の駆動による通風
により追い焚き熱交換器４が冷却されるのに時間がかか
り、追い焚き熱交換器４の湯水の対流現象が抑制され、
かつ、水位センサ２８の配設位置の湯水温が保証温度に
低下するまでの時間が多く必要であり、反対に、追い焚
き熱交換器４の保有熱量が少ない場合には、追い焚き熱
交換器４が早く冷却されるので、湯水の対流現象が抑制
され、かつ、水位センサ２８の配設位置の湯水温が保証
温度になって水位センサ２８のセンサ出力が安定するま
での時間が少なくて済むからである。That is, when the reheating heat exchanger 4 has a large amount of heat, it takes time for the reheating heat exchanger 4 to be cooled by the ventilation by the driving of the combustion fan 7, and the reheating heat The convection phenomenon of hot and cold water in the exchanger 4 is suppressed,
In addition, it takes a long time for the temperature of the hot water at the position where the water level sensor 28 is disposed to drop to the guaranteed temperature, and conversely, when the heat quantity of the reheating heat exchanger 4 is small, the reheating heat exchanger is used. Since the cooling water 4 is cooled quickly, the convection phenomenon of the hot water is suppressed, and the time required for the hot water temperature at the position where the water level sensor 28 is disposed to reach the guaranteed temperature and the sensor output of the water level sensor 28 stabilize is reduced. Because.
【００７８】ただ、バーナー２の燃焼による排気ガスを
燃焼室１内から外部に排出させるためにバーナー２の燃
焼停止後のポストパージ期間は燃焼ファン７の継続駆動
が必要であると考えるので、この実施形態例では、ファ
ン駆動延長時間をポストパージ期間よりも短くしない。However, in order to discharge the exhaust gas generated by the combustion of the burner 2 from the combustion chamber 1 to the outside, it is considered that it is necessary to continuously drive the combustion fan 7 during the post-purge period after the combustion of the burner 2 is stopped. In the embodiment, the fan drive extension time is not shorter than the post-purge period.
【００７９】延長時間設定部５０は給湯単独運転監視部
４４の監視情報を取り込んで、給湯単独運転が終了した
ときに、データ格納部４６から上記ファン駆動延長時間
データを読み込み、前記保有熱量検出部５２が検出出力
した追い焚き熱交換器４の保有熱量を上記ファン駆動延
長時間データに参照してファン駆動延長時間を求め設定
する。この設定されたファン駆動延長時間はデータ格納
部４６のファン駆動延長時間（給湯単独運転以外のバー
ナー２の燃焼停止後のポストパージ期間とは別に格納さ
れているファン駆動延長時間）に上書きされる。燃焼運
転制御部４３は給湯単独運転後にデータ格納部４６のフ
ァン駆動延長時間が終了するまで燃焼ファン７の駆動を
継続して行わせる。The extended time setting section 50 fetches the monitoring information of the hot water single operation monitoring section 44 and, when the hot water single operation is completed, reads the fan drive extended time data from the data storage section 46 and outputs the stored heat quantity detection section. The amount of heat held by the reheating heat exchanger 4 detected and output by 52 is referred to the fan drive extension time data to determine and set the fan drive extension time. The set fan drive extension time is overwritten by the fan drive extension time in the data storage unit 46 (the fan drive extension time stored separately from the post-purge period after the burner 2 stops combustion other than the hot water single operation). . The combustion operation control unit 43 keeps driving the combustion fan 7 until the fan drive extension time of the data storage unit 46 ends after the hot water supply alone operation.
【００８０】もちろん、この実施形態例においても、給
湯単独運転が開始されてから燃焼ファン７の駆動が停止
されるまで、つまり、水位センサ２８のセンサ出力が安
定するまで、水位検出停止部４８による水位検出停止動
作により水位センサ２８による水位検出動作は停止され
ている。Of course, also in this embodiment, the water level detection stop unit 48 operates until the driving of the combustion fan 7 is stopped from the start of the hot water supply alone operation, that is, until the sensor output of the water level sensor 28 is stabilized. The water level detection operation by the water level sensor 28 is stopped by the water level detection stop operation.
【００８１】この実施形態例によれば、時間計測部５１
と保有熱量検出部５２を設けたので、給湯単独運転によ
り追い焚き熱交換器４に与えられる保有熱量を求めるこ
とができる。この実施形態例では、上記求めた保有熱量
に応じてファン駆動延長時間を可変設定する構成にした
ので、給湯単独運転による追い焚き熱交換器４の保有熱
量が多い場合には、給湯単独運転後のファン駆動延長時
間をポストパージ期間よりも延長させることができる。According to this embodiment, the time measuring section 51
And the retained heat amount detection unit 52, the retained heat amount given to the reheating heat exchanger 4 by the hot water supply alone operation can be obtained. In this embodiment, since the fan drive extension time is variably set in accordance with the obtained amount of retained heat, if the amount of retained heat of the reheating heat exchanger 4 by the hot water supply alone operation is large, after the hot water supply alone operation, Can be extended beyond the post-purge period.
【００８２】このため、例えば、追い焚き熱交換器４の
保有熱量が多いために、給湯単独運転後にポストパージ
期間が過ぎても水位センサ２８のセンサ出力が安定しな
い場合に、水位センサ２８のセンサ出力が安定するまで
燃焼ファン７の継続駆動を行わせることが可能である。For this reason, for example, if the sensor output of the water level sensor 28 is not stable even after the post-purge period after the hot water supply operation alone due to a large amount of heat retained by the reheating heat exchanger 4, the sensor of the water level sensor 28 It is possible to continue driving the combustion fan 7 until the output is stabilized.
【００８３】また、燃焼ファン７の駆動が停止されるま
で水位センサ２８による水位検出動作を停止させるの
で、水位センサ２８のセンサ出力が安定したと判断され
て燃焼ファン７の駆動が停止されるまで、水位センサ２
８による水位検出動作は停止されることになり、水位セ
ンサ２８のセンサ出力が不規則に変動しているときには
該水位センサ２８のセンサ出力に基づいた器具運転は行
われず、水位センサ２８のセンサ出力の不規則変動に起
因した器具運転の誤動作を回避することができる。Since the water level detecting operation by the water level sensor 28 is stopped until the driving of the combustion fan 7 is stopped, the operation of the combustion fan 7 is stopped until it is determined that the sensor output of the water level sensor 28 is stabilized. , Water level sensor 2
8 is stopped, and when the sensor output of the water level sensor 28 fluctuates irregularly, the appliance operation based on the sensor output of the water level sensor 28 is not performed, and the sensor output of the water level sensor 28 is not detected. Erroneous operation of the appliance due to irregular fluctuations of the apparatus can be avoided.
【００８４】以下に、第５の実施形態例を説明する。こ
の実施形態例において特徴的なことは、給湯単独運転後
には給湯単独運転以外の燃焼運転後のポストパージ期間
よりも燃焼室１内の風量が多くなるように燃焼運転制御
部４３がファン駆動部４７を介して燃焼ファン７の回転
制御を行うことである。それ以外の構成は前記各実施形
態例と同様であり、その重複説明は省略する。Hereinafter, a fifth embodiment will be described. What is characteristic in this embodiment is that the combustion operation control unit 43 controls the fan drive unit so that the air volume in the combustion chamber 1 is larger after the hot water supply only operation than during the post-purge period after the combustion operation other than the hot water supply only operation. That is, the rotation control of the combustion fan 7 is performed via 47. The other configurations are the same as those of the above-described embodiments, and the description thereof will not be repeated.
【００８５】燃焼運転後のポストパージ期間に燃焼ファ
ン７の継続駆動が行われるときには、バーナー２の燃焼
運転時に燃焼室１に生じる風量よりも格段に風量が少な
くなるように燃焼ファン７の回転制御が行われることが
多い。この実施形態例では、前記の如く、給湯単独運転
後には給湯単独運転以外の燃焼運転後のポストパージ期
間よりも燃焼室１内の風量が多くなるように燃焼ファン
７の回転駆動を制御するようにし、給湯単独運転後の追
い焚き熱交換器４の強制冷却をより促進させる構成にし
た。When the combustion fan 7 is continuously driven during the post-purge period after the combustion operation, the rotation control of the combustion fan 7 is performed so that the air volume generated in the combustion chamber 1 during the combustion operation of the burner 2 is significantly smaller. Is often performed. In this embodiment, as described above, the rotational drive of the combustion fan 7 is controlled so that the air volume in the combustion chamber 1 is larger after the hot water supply only operation than during the post-purge period after the combustion operation other than the hot water supply only operation. In this configuration, forced cooling of the reheating heat exchanger 4 after the hot water supply operation alone is further promoted.
【００８６】この実施形態例によれば、前記各実施形態
例と同様の効果を奏することができる上に、給湯単独運
転後には給湯単独運転以外の燃焼運転後のポストパージ
期間よりも燃焼室１内の風量が多くなるように燃焼ファ
ン７の回転制御が行われるので、給湯単独運転後の燃焼
室１内の風量が上記ポストパージ期間のときよりも多く
なり、給湯単独運転後に給気通風により追い焚き熱交換
器４の冷却をより効果的に行うことができる。According to this embodiment, the same effects as those of the above-described embodiments can be obtained. In addition, after the hot water supply alone operation, the combustion chamber 1 can be operated more than the post-purge period after the combustion operation other than the hot water supply alone operation. Since the rotation of the combustion fan 7 is controlled so that the air flow in the inside increases, the air flow in the combustion chamber 1 after the hot water supply alone operation becomes larger than in the post-purge period, and the air supply and ventilation after the hot water supply operation alone. Cooling of the reheating heat exchanger 4 can be performed more effectively.
【００８７】なお、この実施形態例のように、給湯単独
運転後に給湯単独運転以外の燃焼運転後のポストパージ
期間よりも燃焼室１内の風量が多くなるように燃焼ファ
ン７の回転制御を行った場合には、バーナー２の燃焼に
より生じた排気ガスが上記ポストパージ期間のときより
も早く排出されるので、ファン駆動延長時間をポストパ
ージ期間よりも短く設定することが可能である。As in this embodiment, the rotation control of the combustion fan 7 is performed so that the air volume in the combustion chamber 1 becomes larger after the hot water supply operation alone than during the post-purge period after the combustion operation other than the hot water supply operation alone. In this case, since the exhaust gas generated by the combustion of the burner 2 is discharged earlier than during the post-purge period, the fan drive extension time can be set shorter than the post-purge period.
【００８８】以下に、第６の実施形態例を説明する。こ
の実施形態例が前記第１の実施形態例と異なる特徴的な
ことは、給湯単独運転後に水位センサ２８の配設位置の
湯水温を風呂温度センサ３７により直接的に検出するの
ではなく、給気温に基づき水位センサ２８の配設位置の
湯水温を推定検出し、該推定検出値が予め定めたしきい
値に達したときに水位検出停止動作を終了させる構成と
したことである。それ以外の構成は前記第１の実施形態
例と同様であり、その共通部分の重複説明は省略する。Hereinafter, a sixth embodiment will be described. This embodiment is different from the first embodiment in that the hot water temperature at the position of the water level sensor 28 is not directly detected by the bath temperature sensor 37 after the hot water supply alone operation, The configuration is such that the hot water temperature at the position where the water level sensor 28 is disposed is estimated and detected based on the air temperature, and the water level detection stop operation is terminated when the estimated detected value reaches a predetermined threshold value. The other configuration is the same as that of the first embodiment, and the description of the common parts will not be repeated.
【００８９】この実施形態例では、図１の点線に示すよ
うに、給気温検出手段である給気温センサ２７を設け
る。前述したように、給湯単独運転後に燃焼ファン７が
継続駆動する場合には、給湯単独運転後の燃焼ファン７
の駆動により燃焼室１内に給気通風が生じ、この給気通
風により追い焚き熱交換器４の熱量が奪われて追い焚き
熱交換器４が時間の経過と共に冷却し、この追い焚き熱
交換器４の冷却により水位センサ２８の配設位置の湯水
温が低下する。上記給気温が低くなるに従って追い焚き
熱交換器４の冷却が早くなり、水位センサ２８の配設位
置の湯水温の低下が早くなる。反対に、給気温が高くな
るに従って追い焚き熱交換器４の冷却が遅くなり、水位
センサ２８の配設位置の湯水温の低下が遅くなる。In this embodiment, as shown by a dotted line in FIG. 1, a supply air temperature sensor 27 as a supply air temperature detecting means is provided. As described above, when the combustion fan 7 is continuously driven after the hot water supply operation alone, the combustion fan 7 after the hot water supply operation alone is operated.
By driving the air supply, ventilation air is generated in the combustion chamber 1, the amount of heat of the reheating heat exchanger 4 is deprived by the ventilation air, and the reheating heat exchanger 4 cools down as time passes. The temperature of the hot and cold water at the position where the water level sensor 28 is disposed decreases due to the cooling of the vessel 4. As the supply air temperature decreases, the cooling of the reheating heat exchanger 4 is accelerated, and the temperature of the hot and cold water at the position where the water level sensor 28 is disposed is accelerated. Conversely, as the supply air temperature increases, the cooling of the reheating heat exchanger 4 is delayed, and the drop in the temperature of the hot water at the position where the water level sensor 28 is disposed is delayed.
【００９０】上記のように、水位センサ２８の配設位置
の湯水温の低下傾向は給気温毎に異なるので、給湯単独
運転が停止してからの経過時間と水位センサ２８の配設
位置の湯水温の低下温度の関係を給気温毎に求めること
ができ、このことにより、給湯単独運転が停止してから
の経過時間と給気温に基づき水位センサ２８の配設位置
の湯水温を推定検出することが可能である。As described above, the tendency of the temperature of the hot water at the position where the water level sensor 28 is disposed differs for each supply air temperature. The relationship of the water temperature drop temperature can be obtained for each hot water supply temperature, whereby the hot water temperature at the position where the water level sensor 28 is disposed is estimated and detected based on the elapsed time since the hot water supply independent operation was stopped and the hot water temperature. It is possible.
【００９１】上記のことから、この実施形態例では、給
湯単独運転後に水位センサ２８の配設位置の湯水温が前
記第１の実施形態例に示したしきい値温度Ｔspに低下す
るまでのしきい値時間ｔαを給気温毎に実験や演算等に
より予め求めて水温推定検出データとしてデータ格納部
４６に格納する。上記水温推定検出データは、給気温と
しきい値時間ｔαの関係を示すグラフデータや表データ
や演算式データ等のデ ータ形式によりデータ格納部４
６に格納される。As described above, in the present embodiment, after the hot-water supply alone operation, the temperature of the hot water at the position where the water level sensor 28 is disposed drops to the threshold temperature Tsp shown in the first embodiment. The threshold time tα is obtained in advance for each supply air temperature by an experiment, calculation, or the like, and stored in the data storage unit 46 as water temperature estimation detection data. The water temperature estimation detection data is stored in a data storage unit 4 in a data format such as graph data, table data, or arithmetic expression data indicating the relationship between the supply air temperature and the threshold time tα.
6 is stored.
【００９２】水位検出停止部４８は、給湯単独運転後
に、給気温センサ２７のセンサ出力を検出給気温として
取り込み、この検出給気温を前記データ格納部４６の水
温推定検出データに参照し、水位センサ２８の配設位置
の湯温がしきい値温度Ｔspに低下するまでのしきい値時
間ｔαを求める。The water level detection stop section 48 takes in the sensor output of the air temperature sensor 27 as the detected air temperature after the hot water supply operation alone, refers to the detected air temperature to the water temperature estimation detection data in the data storage section 46, A threshold time tα until the hot water temperature at the location 28 is lowered to the threshold temperature Tsp is determined.
【００９３】また、上記水位検出停止部４８は給湯単独
運転が終了したときに図１の点線に示すタイマ５３をリ
セット・駆動させて給湯単独運転が停止してからの経過
時間の計測を開始させ、このタイマ５３の計測時間を推
定検出値として取り込んで、この推定検出値が上記しき
い値時間ｔαに達したときに、水位センサ２８の配設位
置の湯水温がしきい値温度Ｔspに達したと判断して、水
位センサ２８のセンサ出力が安定したと判断して水位検
出停止動作を終了させる。Further, the water level detection stopping section 48 resets and drives the timer 53 indicated by the dotted line in FIG. 1 when the hot water supply independent operation is completed, and starts measuring the elapsed time from the stop of the hot water supply independent operation. The measured time of the timer 53 is taken as an estimated detection value, and when the estimated detection value reaches the threshold time tα, the temperature of the hot water at the position where the water level sensor 28 is disposed reaches the threshold temperature Tsp. Then, it is determined that the sensor output of the water level sensor 28 has become stable, and the water level detection stop operation is terminated.
【００９４】この実施形態例によれば、給湯単独運転後
の経過時間と給気温に基づき水位センサ２８の配設位置
の湯水温を推定検出して水位検出停止動作の終了タイミ
ングを決定する構成としたので、前記各実施形態例同様
に、給湯単独運転後に水位センサ２８のセンサ出力が安
定するまでの期間、水位検出停止部４８により水位検出
を停止させることができ、給湯単独運転に起因した水位
センサ２８の不安定なセンサ出力によって器具が誤動作
するという問題を回避することが可能である。According to this embodiment, the temperature of the hot water at the position where the water level sensor 28 is installed is estimated and detected based on the elapsed time after the hot water supply alone operation and the hot air supply temperature, and the end timing of the water level detection stop operation is determined. Therefore, similarly to the above embodiments, the water level detection can be stopped by the water level detection stop unit 48 until the sensor output of the water level sensor 28 becomes stable after the hot water supply alone operation, and the water level caused by the hot water supply alone operation It is possible to avoid the problem that the instrument malfunctions due to the unstable sensor output of the sensor 28.
【００９５】また、この実施形態例では、水位センサ２
８の配設位置の湯水温を推定検出して水位検出停止動作
の終了タイミングを決定するので、前記の如く、給湯単
独運転後に燃焼ファン７の継続駆動を行うことによって
水位センサ２８の配設位置の湯水温をより早く冷却でき
て水位センサ２８のセンサ出力が早く安定したときに
は、ポストパージ期間が終了するよりも前に、短時間
で、水位検出停止動作を終了させることができる。In this embodiment, the water level sensor 2
8, the end timing of the water level detection stop operation is determined by estimating and detecting the hot / cold water temperature at the location of the water supply position 8. When the temperature of the hot water can be cooled more quickly and the sensor output of the water level sensor 28 is stabilized earlier, the water level detection stop operation can be completed in a short time before the end of the post-purge period.
【００９６】以下に、第７の実施形態例を説明する。こ
の実施形態例が前記第１の実施形態例と異なる特徴的な
ことは、給湯単独運転後に追い焚き熱交換器４の保有熱
量に基づき水位センサ２８の配設位置の湯水温を推定検
出して水位検出停止動作の終了タイミングを決定する構
成としたことである。それ以外の構成は前記第１の実施
形態例と同様であり、その重複説明は省略する。Hereinafter, a seventh embodiment will be described. This embodiment is different from the first embodiment in that the hot water temperature at the position where the water level sensor 28 is disposed is estimated and detected based on the amount of heat held in the reheating heat exchanger 4 after the hot water supply alone operation. That is, the end timing of the water level detection stop operation is determined. The other configuration is the same as that of the first embodiment, and the description thereof will not be repeated.
【００９７】前述したように、追い焚き熱交換器４の保
有熱量が多くなるに従って給湯単独運転後に水位センサ
２８の配設位置の湯水温が予め定めたしきい値温度Ｔsp
に低下するまでの時間が多くかかり、反対に、追い焚き
熱交換器４の保有熱量が少なくなるに従って給湯単独運
転後に水位センサ２８の配設位置の湯水温が上記しきい
値温度Ｔspに低下するまでの時間が少なくて済み。この
ように、給湯単独運転が停止してからの経過時間と水位
センサ２８の配設位置の湯水温の低下温度との関係を追
い焚き熱交換器４の保有熱量毎に求めることができ、こ
のことにより、追い焚き熱交換器４の保有熱量と給湯単
独運転後の経過時間に基づき水位センサ２８の配設位置
の湯水温を推定検出することが可能である。As described above, the hot water temperature at the position where the water level sensor 28 is disposed becomes the predetermined threshold temperature Tsp after the hot water supply operation alone as the amount of heat retained in the reheating heat exchanger 4 increases.
On the other hand, as the amount of heat held by the reheating heat exchanger 4 decreases, the hot and cold water temperature at the position where the water level sensor 28 is disposed decreases to the threshold temperature Tsp after the hot water supply operation alone. The time until is enough. In this way, the relationship between the elapsed time from when the hot water supply only operation is stopped and the temperature drop of the hot and cold water temperature at the position where the water level sensor 28 is disposed can be determined for each retained heat amount of the reheater 4. This makes it possible to estimate and detect the temperature of the hot and cold water at the position where the water level sensor 28 is disposed, based on the amount of heat retained in the reheating heat exchanger 4 and the elapsed time after the hot water supply alone operation.
【００９８】上記のことから、この実施形態例に示す制
御装置４０は、前記第４の実施形態例に示した時間計測
部５１と保有熱量検出部５２から構成される図１の鎖線
に示す保有熱量検出手段５４を、図１の実線の制御構成
に加えて構成されている。上記保有熱量検出手段５４
は、前記第４の実施形態例同様に、給湯単独運転後に追
い焚き熱交換器４の保有熱量を求める。From the above, the control device 40 shown in this embodiment is different from the holding device shown by the chain line in FIG. 1 which comprises the time measuring section 51 and the held calorie detecting section 52 shown in the fourth embodiment. The calorie detecting means 54 is configured in addition to the control configuration shown by the solid line in FIG. The retained calorie detection means 54
Calculates the amount of heat retained in the reheating heat exchanger 4 after the hot water supply operation alone, as in the fourth embodiment.
【００９９】データ格納部４６には給湯単独運転後に水
位センサ２８の配設位置の湯水温が予め定めたしきい値
温度Ｔspに低下するまでの時間を追い焚き熱交換器４の
保有熱量毎に実験や演算等により予め求めて水温推定検
出データとして格納されている。水位検出停止部４８
は、上記保有熱量検出手段５４が求めた保有熱量を前記
データ格納部４６の水温推定検出データに参照して水位
センサ２８の配設位置の湯水温がしきい値温度Ｔspに低
下するのに要するしきい値時間を求める。The data storage section 46 records the time until the water temperature at the position where the water level sensor 28 is disposed drops to the predetermined threshold temperature Tsp after the hot water supply operation alone, for each heat quantity held by the heat exchanger 4. It is obtained in advance through experiments, calculations, and the like, and is stored as water temperature estimation detection data. Water level detection stop unit 48
Is required for the temperature of hot water at the position where the water level sensor 28 is disposed to fall to the threshold temperature Tsp with reference to the water temperature estimation detection data in the data storage unit 46 using the stored heat amount obtained by the stored heat amount detection means 54. Find the threshold time.
【０１００】また、水位検出停止部４８は給湯単独運転
が停止したときにタイマ５３をリセット・駆動させ、給
湯単独運転が停止してからの経過時間の計測を開始さ
せ、このタイマ５３の計測時間を推定検出値として取り
込んで、このタイマ５３の計測時間が上記しきい値時間
に達したときに、水位センサ２８の配設位置の湯水温が
しきい値温度Ｔspに低下したと判断し、水位センサ２８
のセンサ出力が安定したと判断して水位検出停止動作を
終了させる。The water level detection stopping section 48 resets and drives the timer 53 when the hot water supply operation is stopped, and starts measuring the elapsed time from the stop of the hot water supply operation. Is taken as an estimated detection value, and when the time measured by the timer 53 reaches the threshold time, it is determined that the temperature of the hot and cold water at the position where the water level sensor 28 is disposed has dropped to the threshold temperature Tsp. Sensor 28
It is determined that the sensor output has become stable, and the water level detection stop operation is terminated.
【０１０１】この実施形態例によれば、給湯単独運転後
の経過時間と追い焚き熱交換器４の保有熱量に基づき水
位センサ２８の配設位置の湯水温を推定検出して給湯単
独運転後の水位検出停止動作の終了タイミングを決定す
る構成としたので、前記各実施形態例同様に、給湯単独
運転後に水位センサ２８のセンサ出力が安定するまでの
期間、水位検出停止部４８により水位検出動作を停止さ
せることができ、給湯単独運転に起因した水位センサ２
８の不安定なセンサ出力によって器具が誤動作するとい
う問題を回避することが可能である。According to this embodiment, the temperature of the hot water at the position where the water level sensor 28 is disposed is estimated and detected based on the elapsed time after the hot water supply alone operation and the amount of heat held by the reheating heat exchanger 4, and the operation after the hot water supply alone operation is performed. Since the end timing of the water level detection stop operation is determined, the water level detection stop unit 48 performs the water level detection operation by the water level detection stop unit 48 until the sensor output of the water level sensor 28 becomes stable after the single hot water supply operation, as in the above-described embodiments. Water level sensor 2 which can be stopped and is caused by hot water supply alone operation
It is possible to avoid the problem that the appliance malfunctions due to the unstable sensor output of FIG.
【０１０２】以下に、第８の実施形態例を説明する。こ
の実施形態例が前記第１の実施形態例と異なる特徴的な
ことは、給気温と追い焚き熱交換器４の保有熱量を組み
合わせて水位センサ２８の配設位置の湯水温を推定検出
して給湯単独運転後の水位検出停止動作の終了タイミン
グを決定する構成としたことである。それ以外の構成は
前記第１の実施形態例と同様であり、その共通部分の重
複説明は省略する。Hereinafter, an eighth embodiment will be described. The feature of this embodiment different from the first embodiment is that the hot water temperature at the position where the water level sensor 28 is disposed is estimated and detected by combining the supply air temperature and the amount of heat retained in the reheating heat exchanger 4. It is configured to determine the end timing of the water level detection stop operation after the hot water supply alone operation. The other configuration is the same as that of the first embodiment, and the description of the common parts will not be repeated.
【０１０３】この実施形態例では、図１の実線に示した
制御構成に加えて、図１の二点鎖線に示す保有熱量・給
気温検出手段５５を設けて構成されている。この保有熱
量・給気温検出手段５５は、前記第４の実施形態例に示
した時間計測部５１と保有熱量検出部５２を有して構成
されており、保有熱量検出部５２は、時間計測部５１が
計測した給湯単独運転運転時間と給気温に基づいて、給
湯単独運転後に、追い焚き熱交換器４の保有熱量を求め
る。In this embodiment, in addition to the control structure shown by the solid line in FIG. 1, a retained heat / supply temperature detecting means 55 shown by a two-dot chain line in FIG. 1 is provided. The retained calorie / supply temperature detecting means 55 includes the time measuring section 51 and the retained calorie detecting section 52 shown in the fourth embodiment, and the retained calorie detecting section 52 includes a time measuring section. Based on the hot water supply single operation time and the supply air temperature measured by 51, the heat quantity of the reheater 4 is determined after the hot water supply alone operation.
【０１０４】データ格納部４６には、上記第７の実施形
態例に示した水温推定検出データ、つまり、給湯単独運
転後に水位センサ２８の配設位置の湯水温がしきい値温
度Ｔspに低下するのに要する時間が追い焚き熱交換器４
の保有熱量毎に与えられているデータが格納されてい
る。The data storage unit 46 stores the estimated water temperature data shown in the seventh embodiment, that is, the temperature of the hot water at the position where the water level sensor 28 is disposed drops to the threshold temperature Tsp after the hot water supply alone operation. Time required for reheating of heat exchanger 4
Is stored for each of the stored heat quantities.
【０１０５】水位検出停止部４８は、給湯単独運転後
に、上記保有熱量・給気温検出手段５５の保有熱量検出
部５２が検出した追い焚き熱交換器４の保有熱量を上記
データ格納部４６の水温推定検出データに参照させてし
きい値時間を求める。また、水位検出停止部４８は、給
湯単独運転が停止したときにタイマ５３をリセット・駆
動させて給湯単独運転が停止してからの計測時間を計測
させ、このタイマ５３の計測時間を推定検出値として取
り込んで、このタイマ５３の計測時間が上記しきい値時
間に達したときに、水位センサ２８の配設位置の湯水温
がしきい値温度Ｔspに低下したと判断し、水位センサ２
８のセンサ出力が安定したと判断して水位検出停止動作
を終了させる。The water level detection stopping section 48 stores the heat quantity of the reheating heat exchanger 4 detected by the stored heat quantity detection section 52 of the stored heat quantity / air temperature detection means 55 after the hot water supply alone operation in the water temperature of the data storage section 46. The threshold time is obtained by referring to the estimated detection data. Further, the water level detection stop unit 48 resets and drives the timer 53 when the hot water supply independent operation is stopped so as to measure a measurement time from the stop of the hot water supply independent operation, and determines the measurement time of the timer 53 as an estimated detection value. When the time measured by the timer 53 reaches the threshold time, it is determined that the temperature of the hot water at the position where the water level sensor 28 is disposed has dropped to the threshold temperature Tsp.
It is determined that the sensor output of No. 8 has become stable, and the water level detection stop operation is terminated.
【０１０６】この実施形態例によれば、給気温を考慮し
た追い焚き熱交換器４の保有熱量に基づき給湯単独運転
後の水位検出停止動作の終了タイミングを決定する構成
としたので、前記各実施形態例同様に、給湯単独運転後
に水位センサ２８のセンサ出力が安定するまでの期間、
水位検出停止部４８により水位検出動作を停止させるこ
とができ、給湯単独運転に起因した水位センサ２８の不
安定なセンサ出力によって器具が誤動作するという問題
を回避することが可能である。According to this embodiment, the end timing of the water level detection stop operation after the hot water supply operation alone is determined based on the amount of heat retained in the reheating heat exchanger 4 in consideration of the supply air temperature. Similarly to the embodiment, a period until the sensor output of the water level sensor 28 is stabilized after the hot water supply alone operation,
The water level detection operation can be stopped by the water level detection stop unit 48, and it is possible to avoid the problem that the appliance malfunctions due to the unstable sensor output of the water level sensor 28 due to the hot water supply alone operation.
【０１０７】なお、この発明は上記各実施形態例に限定
されるものではなく、様々な実施の形態を採り得る。例
えば、上記第１の実施形態例では、しきい値温度は水位
センサ２８の保証温度範囲の上限値に設定されていた
が、しきい値温度は水位センサ２８の保証温度範囲の上
限値に限定されるものではない。例えば、給湯単独運転
後に風呂温度センサ３７が検出する湯水温が水位センサ
２８の配設位置の湯水温よりも低い場合には、しきい値
温度は水位センサ２８の保証温度の上限値よりも低く設
定される。The present invention is not limited to the above embodiments, but may take various embodiments. For example, in the first embodiment, the threshold temperature is set to the upper limit of the guaranteed temperature range of the water level sensor 28, but the threshold temperature is limited to the upper limit of the guaranteed temperature range of the water level sensor 28. It is not something to be done. For example, if the temperature of the hot water detected by the bath temperature sensor 37 after the hot water supply alone operation is lower than the temperature of the hot water at the position where the water level sensor 28 is provided, the threshold temperature is lower than the upper limit value of the guaranteed temperature of the water level sensor 28. Is set.
【０１０８】また、風呂温度センサ３７が水位センサ２
８の配設位置よりも追い焚き熱交換器４に近く追い焚き
熱交換器４の近傍に設けられている場合には、給湯単独
運転時に風呂温度センサ３７が検出する検出湯水温は水
位センサ２８の配設位置の湯水温よりも高いので、給湯
単独運転後に水位センサ２８の配設位置の湯水温が水位
センサ２８の保証温度の上限値に低下したときに、風呂
温度センサ３７の検出湯水温は水位センサ２８の保証温
度の上限値よりも高くなる。このような場合には上記し
きい値温度は水位センサ２８の保証温度の上限値よりも
高く設定してもよい。もちろん、しきい値温度を水位セ
ンサ２８の保証温度の上限値よりも低く設定してもよ
い。The bath temperature sensor 37 is connected to the water level sensor 2.
8 is provided closer to the reheating heat exchanger 4 than the disposition position of the substation 8, the detected hot water temperature detected by the bath temperature sensor 37 during the hot water supply alone operation is equal to the water level sensor 28. Is higher than the water temperature at the location where the water temperature sensor 28 is located, and when the water temperature at the location where the water level sensor 28 is disposed drops to the upper limit value of the guaranteed temperature of the water level sensor 28 after the hot water supply alone operation, the detected water temperature of the bath temperature sensor 37 Is higher than the upper limit value of the guaranteed temperature of the water level sensor 28. In such a case, the threshold temperature may be set higher than the upper limit value of the guaranteed temperature of the water level sensor 28. Of course, the threshold temperature may be set lower than the upper limit of the guaranteed temperature of the water level sensor 28.
【０１０９】さらに、上記第３や第４の実施形態例で
は、給湯単独運転のバーナー２の燃焼停止後に燃焼ファ
ン７の継続駆動を行わせる期間であるファン駆動延長時
間と、給湯単独運転以外の運転のバーナー２の燃焼停止
後に燃焼ファン７の継続駆動を行わせるポストパージ期
間とは別個に与えられていたが、上記ファン駆動延長時
間だけを与えておき、給湯単独運転以外の運転のバーナ
ー２の燃焼停止後にも上記ファン駆動延長時間の間、燃
焼ファン７の継続駆動を行わせるようにしてもよい。Further, in the third and fourth embodiments, the fan drive extension time period during which the combustion fan 7 is continuously driven after the combustion of the burner 2 in the hot water supply only operation is stopped, and the fan drive extension time other than the hot water supply only operation. Although the post-purge period is provided separately from the post-purge period in which the combustion fan 7 is continuously driven after the operation of the burner 2 is stopped, only the above-described fan drive extension time is provided, and the burner 2 in the operation other than the hot water supply alone operation is provided. After the combustion is stopped, the combustion fan 7 may be continuously driven during the fan drive extension time.
【０１１０】上記第３や第４の実施形態例では、ファン
駆動延長時間データは、図３や図６に示すように、グラ
フデータのデータ形式で格納されていたが、給気温（第
４の実施形態例では追い焚き熱交換器４の保有熱量）に
対応させてファン駆動延長時間が与えられている表デー
タや、給気温（保有熱量）をパラメータとしてファン駆
動延長時間を求める演算式データ等、グラフデータ以外
のデータ形式によりファン駆動延長時間データを構成し
データ格納部４６に格納してもよい。In the third and fourth embodiments, the fan drive extension time data is stored in the form of graph data as shown in FIG. 3 and FIG. In the embodiment, table data in which the fan drive extension time is given corresponding to the reheating heat exchanger 4 holding heat amount), arithmetic expression data for calculating the fan driving extension time using the supply air temperature (holding heat amount) as a parameter, and the like. Alternatively, the fan drive extension time data may be configured in a data format other than the graph data and stored in the data storage unit 46.
【０１１１】さらに、上記第４の実施形態例では、保有
熱量データは、図５に示すように、グラフデータにより
構成されていたが、表データや演算式データ等のグラフ
データ以外のデータ形式で構成してデータ格納部４６に
格納してもよい。Further, in the above-described fourth embodiment, the retained calorie data is constituted by graph data as shown in FIG. 5, but the data is in a data format other than the graph data such as table data or arithmetic expression data. It may be configured and stored in the data storage unit 46.
【０１１２】さらに、上記第４の実施形態例では、保有
熱量検出部５２は、燃焼運転制御部４３からバーナー２
の燃焼熱量の情報を取り込んでいたが、次に示す情報を
バーナー２の燃焼熱量情報として取り込んでもよい。例
えば、燃焼ファン７の駆動量はバーナー２の燃焼熱量に
応じて可変制御されるものなので、燃焼ファン７の駆動
量はバーナー２の燃焼熱量に対応している。このことか
ら、保有熱量検出部５２は燃焼ファン７の駆動量をバー
ナー２の燃焼熱量情報として取り込んでもよい。Further, in the fourth embodiment, the retained calorie detection unit 52 sends the burner 2
Although the information on the combustion heat amount of the burner 2 has been taken in, the following information may be taken as the combustion heat amount information of the burner 2. For example, since the drive amount of the combustion fan 7 is variably controlled according to the combustion heat amount of the burner 2, the drive amount of the combustion fan 7 corresponds to the combustion heat amount of the burner 2. For this reason, the retained calorie detection unit 52 may take in the drive amount of the combustion fan 7 as the combustion calorie information of the burner 2.
【０１１３】また、バーナー２の燃焼熱量はバーナー２
に供給される燃料ガスの供給量により制御しており、こ
の燃焼ガスの供給量は比例弁１２の開弁量により制御し
ているので、保有熱量検出部５２は比例弁１２の開弁量
を制御している比例弁駆動電流をバーナー２の燃焼熱量
情報として取り込んでもよいし、上記比例弁１２の開弁
量に応じてガス供給通路８を流れる燃料ガス流量が可変
するので、ガス供給通路８に燃料ガス流量を検出するた
めのフローセンサを設け、保有熱量検出部５２は上記フ
ローセンサにより検出される燃焼ガスの流量をバーナー
２の燃焼熱量情報として取り込んでもよい。The heat of combustion of the burner 2 is
Is controlled by the supply amount of the fuel gas supplied to the fuel cell, and the supply amount of the combustion gas is controlled by the opening amount of the proportional valve 12. The controlled proportional valve driving current may be taken in as the combustion heat amount information of the burner 2, or the flow rate of the fuel gas flowing through the gas supply passage 8 varies according to the opening amount of the proportional valve 12. May be provided with a flow sensor for detecting the fuel gas flow rate, and the retained calorie detection unit 52 may take in the flow rate of the combustion gas detected by the flow sensor as combustion calorie information of the burner 2.
【０１１４】さらに、給湯単独運転中に、入水温度セン
サ３２が検出する入水温度Ｔinと、リモコン４１に設定
されている給湯設定温度Ｔsと、水量センサ３１が検出
する入水量Ｑと、出湯温度センサ３８が検出した出湯温
度Ｔoutとをバーナー２の燃焼熱量情報として取り込ん
で、予め与えられている燃焼熱量検出用データ（例え
ば、Ｐ＝（Ｔs−Ｔin）・Ｑ＋（Ｔout−Ｔin）・Ｑ）に
基づきバーナー２の燃焼熱量Ｐを保有熱量検出部５２が
直接に求めてもよい。さらに、保有熱量検出部５２は給
気温センサ２７が検出する給気温を考慮して給湯単独運
転中の追い焚き熱交換器４の保有熱量をより正確に求め
るようにしてもよい。Further, during the hot water supply operation alone, the water supply temperature Tin detected by the water supply temperature sensor 32, the hot water supply set temperature Ts set on the remote controller 41, the water supply amount Q detected by the water amount sensor 31, and the water supply temperature sensor. The hot water temperature Tout detected by 38 is taken in as combustion heat amount information of the burner 2, and is given to combustion heat amount detection data (for example, P = (Ts−Tin) · Q + (Tout−Tin) · Q). The retained calorie detection unit 52 may directly determine the combustion calorie P of the burner 2 based on the calorific value. Further, the retained heat amount detection unit 52 may determine the retained heat amount of the reheating heat exchanger 4 during the hot water supply alone operation more accurately in consideration of the supply air temperature detected by the supply air temperature sensor 27.
【０１１５】さらに、上記各実施形態例では、水位検出
停止部４８は給湯単独運転が行われている全期間に渡り
水位センサ２８による水位検出動作を停止させていた
が、水位検出停止部４８は給湯単独運転が行われている
期間のうち予め定めた一部の期間だけ水位センサ２８に
よる水位検出動作を停止させるようにしてもよい。Further, in each of the above embodiments, the water level detection stop unit 48 stops the water level detection operation by the water level sensor 28 during the entire period in which the hot water supply alone operation is performed. The operation of detecting the water level by the water level sensor 28 may be stopped only during a predetermined part of the period in which the hot water supply operation alone is being performed.
【０１１６】例えば、水位センサ２８による水位検出動
作の停止を判断する停止しきい値温度Ｔstを予め定めて
おき、水位検出停止部４８は給湯単独運転中に風呂温度
センサ３７が検出する検出温度と上記停止しきい値温度
Ｔstを比較して風呂温度センサ３７の検出温度が停止し
きい値温度Ｔst以上になったと判断したときに、水位セ
ンサ２８のセンサ出力が不規則に変動し始め、この水位
センサ２８のセンサ出力の不規則変動に起因して器具が
誤動作を起こす虞があると判断し、水位センサ２８によ
る水位検出動作を停止させるようにしてもよい。For example, a stop threshold temperature Tst for judging the stop of the water level detection operation by the water level sensor 28 is determined in advance, and the water level detection stop unit 48 detects the detected temperature detected by the bath temperature sensor 37 during the hot water supply alone operation. When it is determined that the temperature detected by the bath temperature sensor 37 has become equal to or higher than the stop threshold temperature Tst by comparing the stop threshold temperature Tst, the sensor output of the water level sensor 28 starts to fluctuate irregularly. It may be determined that the appliance may malfunction due to irregular fluctuations in the sensor output of the sensor 28, and the water level detection operation by the water level sensor 28 may be stopped.
【０１１７】また、給湯単独運転が開始されバーナー２
の燃焼により追い焚き熱交換器４が加熱され始めて水位
センサ２８のセンサ出力が不規則に変動し始めると考え
られる、例えば、図５に示す時間ｔbをしきい値時間と
して予め定めておき、水位検出停止部４８は、給湯単独
運転が開始されてから上記しきい値時間が経過したとき
に、水位センサ２８のセンサ出力が不規則に変動し始
め、この水位センサ２８のセンサ出力の不規則変動に起
因して器具が誤動作を起こす虞があると判断し、水位セ
ンサ２８による水位検出動作を停止させるようにしても
よい。また、給湯単独運転が開始されてから水位センサ
２８のセンサ出力が不安定になるまでの時間は追い焚き
熱交換器４の保有熱量に応じて可変することから、前記
した保有熱量検出部５２を設けて、この保有熱量検出部
５２が検出する追い焚き熱交換器４の保有熱量が多くな
るに従って上記しきい値時間ｔbを短くなる方向 に可変
制御してもよい。Further, the hot water supply operation is started alone and the burner 2 is started.
It is considered that the reburning heat exchanger 4 starts to be heated by the combustion of the water and the sensor output of the water level sensor 28 starts to fluctuate irregularly. For example, the time tb shown in FIG. The detection stop unit 48 detects that the sensor output of the water level sensor 28 starts to fluctuate irregularly when the threshold time elapses after the single hot water supply operation is started, and that the sensor output of the water level sensor 28 fluctuates irregularly. It may be determined that there is a risk of malfunction of the appliance due to the above, and the water level detection operation by the water level sensor 28 may be stopped. In addition, the time from when the hot water supply only operation is started to when the sensor output of the water level sensor 28 becomes unstable varies depending on the amount of heat retained in the reheating heat exchanger 4. The threshold time tb may be variably controlled in such a manner that the threshold time tb becomes shorter as the retained heat amount of the reheating heat exchanger 4 detected by the retained heat amount detection unit 52 increases.
【０１１８】さらに、水位検出停止部４８は給湯単独運
転中には水位検出停止動作を行わず、給湯単独運転後に
予め定めた期間が終了するまでの期間だけ、水位センサ
２８による水位検出動作を停止させるようにしてもよ
い。Further, the water level detection stop unit 48 does not perform the water level detection stop operation during the hot water supply operation alone, and stops the water level detection operation by the water level sensor 28 only until a predetermined period after the hot water supply operation alone. You may make it do.
【０１１９】さらに、上記各実施形態例に示した器具
は、バーナー２の燃焼後に、燃焼ファン７の駆動を継続
して行うポストパージ期間が与えられていたが、この発
明は上記ポストパージ期間が設定されていない器具にも
適用することができる。例えば、上記第１の実施形態例
に示すように、水位検出停止部４８を設けて、給湯単独
運転後に風呂温度センサ３７の検出湯水が予め定めたし
きい値温度に低下するまで水位センサ２８による水位検
出動作を停止させることにより、上記各実施形態例同様
に、水位センサ２８のセンサ出力の不規則変動に起因し
た器具運転の誤動作を回避することが可能である。Further, the apparatus shown in each of the above embodiments is provided with a post-purge period in which the combustion fan 7 is continuously driven after the burner 2 is burnt. It can also be applied to appliances that have not been set. For example, as shown in the first embodiment, the water level detection stop unit 48 is provided, and the water level sensor 28 is used until the water detected by the bath temperature sensor 37 drops to a predetermined threshold temperature after the hot water supply operation alone. By stopping the water level detection operation, it is possible to avoid a malfunction of the appliance operation due to the irregular fluctuation of the sensor output of the water level sensor 28 as in the above embodiments.
【０１２０】また、前記各実施形態例に示すように、給
湯単独運転後のファン駆動延長時間を予め定めて与えて
おき、給湯単独運転後に上記ファン駆動延長時間が終了
するまで燃焼ファン７の継続駆動を行わせることによ
り、給湯単独運転により加熱された追い焚き熱交換器４
を燃焼ファン７の駆動による通風により強制的に冷却さ
せることができる。その上、給湯単独運転後に風呂温度
センサ３７が検出した湯水温がしきい値温度に低下する
までの期間、あるいは、燃焼ファン７が駆動している期
間は水位検出停止部４８により水位検出動作を停止させ
ることができるので、水位センサ２８の不規則変動に起
因した器具の誤動作を回避することができる。Further, as shown in each of the above embodiments, the fan drive extension time after the hot water supply only operation is predetermined and given, and the combustion fan 7 is continued until the fan drive extension time after the hot water supply alone operation ends. By performing the driving, the reheater 4 is heated by the hot water supply alone operation.
Can be forcibly cooled by ventilation by driving of the combustion fan 7. In addition, the water level detection operation is performed by the water level detection stop unit 48 until the hot water temperature detected by the bath temperature sensor 37 decreases to the threshold temperature after the hot water supply operation alone or the combustion fan 7 is driven. Since it can be stopped, it is possible to avoid malfunction of the appliance caused by irregular fluctuation of the water level sensor 28.
【０１２１】さらに、上記各実施形態例では、給湯単独
運転後に予め定めたファン駆動延長時間が経過したとき
に燃焼ファン７の継続駆動を停止していたが、風呂温度
センサ３７の検出湯水温が予め定めたしきい値温度に低
下したときに燃焼ファン７の継続駆動を停止するように
してもよい。Further, in each of the above-described embodiments, the continuous driving of the combustion fan 7 is stopped when a predetermined fan drive extension time has elapsed after the hot water supply operation alone. The continuous driving of the combustion fan 7 may be stopped when the temperature drops to a predetermined threshold temperature.
【０１２２】さらに、上記第１と第６と第７と第８の各
実施形態例では、給湯単独運転後に水位センサ２８の配
設位置の湯水温の直接検出値又は推定検出値がしきい値
に達したときに水位検出停止動作を終了させていたが、
上記直接検出値又は推定検出値がしきい値に達してから
予め定めた余裕期間を経過したときに、水位検出停止動
作を終了させるようにしてもよい。Further, in each of the first, sixth, seventh and eighth embodiments, the direct detection value or the estimated detection value of the hot or cold water temperature at the position where the water level sensor 28 is disposed after the hot water supply alone operation is performed. Had stopped the water level detection when it reached
The water level detection stop operation may be terminated when a predetermined margin period has elapsed since the direct detection value or the estimated detection value reached the threshold value.
【０１２３】さらに、上記第２と第３と第４と第５の各
実施形態例では、給湯単独運転後に燃焼ファン７の継続
駆動が停止したときに水位検出停止動作を終了させてい
たが、燃焼ファン７の継続駆動が終了してから予め定め
た余裕期間が経過したときに水位検出停止動作を終了さ
せるようにしてもよい。Further, in each of the second, third, fourth, and fifth embodiments, when the continuous driving of the combustion fan 7 is stopped after the hot water supply operation alone, the water level detection stop operation is terminated. The water level detection stop operation may be ended when a predetermined margin period has elapsed since the end of the continuous drive of the combustion fan 7.
【０１２４】さらに、上記各実施形態例では、給湯単独
運転監視部４４は、注湯制御弁２６が閉状態であり、か
つ、水流センサ３６が追い焚き循環通路２４内の通水を
検知しておらず、かつ、水量センサ３１が給水通路１３
内の通水を検知しているときには、給湯単独運転が行わ
れていると検知していたが、給湯単独運転監視部４４
は、水量センサ３１と給湯確認スイッチ３５が共に通水
を検知し、かつ、上記水量センサ３１が検出している給
水通路１３の水流検出値と、給湯確認スイッチ３５が検
出している給湯通路１４の流量検出値とがほぼ等しいと
きに、給湯単独運転が行われていると検知するようにし
てもよい。さらに、給湯単独運転監視部４４は、給湯確
認スイッチ３５が給湯通路１４の通水を検知し、かつ、
注湯制御弁２６が開状態のときの予め定まる湯張り通路
２５の水圧（動圧）を水位センサ２８が検知しておら
ず、かつ、循環ポンプ２０が駆動していないときには、
給湯単独運転が行われていると検知するようにしてもよ
い。Further, in each of the above embodiments, the hot-water supply independent operation monitoring section 44 detects that the pouring control valve 26 is in the closed state and the water flow sensor 36 detects the flow of water in the reheating steam circulation passage 24. And the water quantity sensor 31 is
When it is detected that water is flowing through the inside, it is detected that the hot water supply independent operation is being performed.
The water flow sensor 31 and the hot water supply confirmation switch 35 both detect water flow, and the water flow detection value of the water supply passage 13 detected by the water flow sensor 31 and the hot water supply passage 14 detected by the hot water supply confirmation switch 35 It may be detected that the hot water supply alone operation is being performed when the detected flow rate values are substantially equal to each other. Further, the hot water supply independent operation monitoring unit 44 detects that the hot water supply confirmation switch 35 detects the passage of water through the hot water supply passage 14, and
When the water level sensor 28 does not detect the predetermined water pressure (dynamic pressure) of the filling passage 25 when the pouring control valve 26 is in the open state, and the circulation pump 20 is not driven,
You may make it detect that hot-water supply independent operation is performed.
【０１２５】さらに、上記各実施形態例は図７に示す器
具を例にして説明したが、この発明は一缶二水路タイプ
の風呂給湯器で、追い焚き循環通路に追い焚き循環通路
温度センサが設けられ、また、追い焚き循環通路又は追
い焚き循環通路に連通する連通通路に浴槽の水位を水圧
により検出する水位センサが設けられているものであれ
ば、図７以外のシステム構成の一缶二水路風呂給湯器に
も適用することができる。例えば、図７に示す湯張り通
路２５が省略されて水位センサ２８が追い焚き循環通路
２４に配設されている一缶二水路風呂給湯器にも適用す
ることができる。この場合にも、上記各実施形態例同様
に水位センサ２８による水位検出動作の停止を行うこと
により、給湯単独運転による追い焚き熱交換器４の滞留
湯水の高温加熱に起因した水位センサ２８のセンサ出力
の不規則変動に因る器具の誤動作を防止することができ
る。Further, in each of the above embodiments, the appliance shown in FIG. 7 has been described as an example. However, the present invention relates to a one-can-two-water-bath type water heater, in which a reheating circulation passage temperature sensor is provided in the reheating circulation passage. If the water level sensor that detects the water level of the bathtub by the water pressure is provided in the reheating circulation path or the communication path communicating with the reheating circulation path, the can configuration of the system other than FIG. It can also be applied to water bath water heaters. For example, the present invention can be applied to a one-can-two-channel bath water heater in which the water filling passage 25 shown in FIG. 7 is omitted and the water level sensor 28 is disposed in the reheating circulation passage 24. In this case as well, by stopping the water level detection operation by the water level sensor 28 in the same manner as in each of the above embodiments, the sensor of the water level sensor 28 caused by the high temperature heating of the retained hot water in the reheating heat exchanger 4 by the hot water supply alone operation. It is possible to prevent the malfunction of the appliance due to the irregular fluctuation of the output.
【０１２６】[0126]
【発明の効果】この発明によれば、給湯単独運転監視部
と水位検出停止部を設けたので、給湯単独運転後に予め
定めた期間、水位センサの配設位置の水温の直接検出値
又は推定検出値が予め定めたしきい値に達するまで、あ
るいは、水位センサの配設位置の水温の直接検出値又は
推定検出値が予め定めたしきい値に達してから予め定め
た余裕期間が経過するまで、あるいは、燃焼ファンの継
続駆動が停止するまで、あるいは、燃焼ファンの継続駆
動が停止してから予め定めた余裕期間が経過するまでの
期間が終了するまで、上記水位検出停止部により水位検
出動作を停止させることができる。According to the present invention, since the hot water supply independent operation monitoring section and the water level detection stop section are provided, the direct detection value or estimated detection of the water temperature at the position where the water level sensor is disposed for a predetermined period after the hot water supply independent operation. Until the value reaches a predetermined threshold value, or until a predetermined margin period elapses after the direct detection value or estimated detection value of the water temperature at the location of the water level sensor reaches the predetermined threshold value. Or, until the continuous driving of the combustion fan stops, or until the period from the stop of the continuous driving of the combustion fan to the elapse of a predetermined margin period ends, the water level detection operation by the water level detection stop unit. Can be stopped.
【０１２７】上記水位検出停止部により水位検出動作が
停止される期間は、給湯単独運転時の追い焚き熱交換器
の加熱に起因して水位センサのセンサ出力が不規則に変
動すると判断される期間であることから、上記の如く、
その期間に水位検出動作を停止することにより、上記不
規則変動している水位センサ出力に基づき不正確な浴槽
水位が検出され該不正確な浴槽水位に基づいて器具運転
が行われ器具が誤動作するという問題を回避することが
できる。The period in which the water level detection operation is stopped by the water level detection stop section is a period in which it is determined that the sensor output of the water level sensor fluctuates irregularly due to the heating of the reheating heat exchanger during the hot water supply alone operation. Therefore, as described above,
By stopping the water level detection operation during that period, an incorrect bathtub water level is detected based on the irregularly varied water level sensor output, and the appliance is operated based on the incorrect bathtub water level, and the appliance malfunctions. Problem can be avoided.
【０１２８】給湯単独運転後にファン駆動延長時間を経
過するまで、燃焼ファンを継続駆動させるファン駆動部
を設けたものにあっては、給湯単独運転により加熱され
た追い焚き熱交換器を燃焼ファンの駆動による給気通風
により強制冷却させることができる。このことから、給
湯単独運転後に燃焼ファンを駆動させない場合よりも、
追い焚き熱交換器を早く冷却させることができ、このこ
とにより、給湯単独運転後に水位センサのセンサ出力が
安定するまでの期間を短縮させることが可能である。In the apparatus provided with a fan drive unit for continuously driving the combustion fan until the fan drive extension time elapses after the hot water supply operation alone, the reheating heat exchanger heated by the hot water supply operation alone is connected to the combustion fan. Forced cooling can be achieved by air supply and ventilation by driving. From this, compared to the case where the combustion fan is not driven after the hot water supply alone operation,
It is possible to quickly cool the reheating heat exchanger, thereby shortening the period until the sensor output of the water level sensor becomes stable after the hot water supply operation alone.
【０１２９】上記ファン駆動延長時間を可変設定する延
長時間設定部を設けた発明にあっては、給湯単独運転に
起因して不規則変動していた水位センサのセンサ出力が
給湯単独運転後に安定するまでの期間を決定する給気
温、あるいは、追い焚き熱交換器の保有熱量に応じて、
ファン駆動延長時間を可変設定することができるので、
ファン駆動延長時間を水位センサのセンサ出力が安定す
るまでの期間により正確に合わせることができる。In the invention provided with the extension time setting section for variably setting the fan drive extension time, the sensor output of the water level sensor irregularly fluctuating due to the hot water supply alone operation is stabilized after the hot water supply alone operation. Depending on the supply air temperature that determines the period up to, or the amount of heat held by the reheating heat exchanger,
Since the fan drive extension time can be set variably,
The fan drive extension time can be more accurately adjusted to the period until the sensor output of the water level sensor is stabilized.
【０１３０】このことにより、次のような問題を回避す
ることが可能である。例えば、ファン駆動延長時間を長
い一定時間に設定したために、給湯単独運転後に水位セ
ンサのセンサ出力が安定してからファン駆動延長時間が
終了するまでの時間が開いてしまい、器具運転の無駄が
生じたり、反対に、ファン駆動延長時間を短い一定時間
に設定したために、水位センサのセンサ出力が安定する
前にファン駆動延長時間か終了してしまい、水位センサ
の不規則変動しているセンサ出力により器具が誤動作し
てしまうという問題が生じるが、上記のように、給湯単
独運転後に水位センサのセンサ出力が安定するまでの期
間に合うようにファン駆動延長時間を可変設定すること
により、上記のような器具運転の無駄や器具の誤動作を
回避することが可能である。As a result, the following problem can be avoided. For example, because the fan drive extension time is set to a long constant time, the time from when the sensor output of the water level sensor stabilizes after the hot water supply alone operation to the end of the fan drive extension time is widened, resulting in waste of appliance operation. Or, conversely, because the fan drive extension time is set to a short fixed time, the fan drive extension time ends before the sensor output of the water level sensor stabilizes, and the sensor output of the water level sensor fluctuates irregularly. Although the problem that the appliance malfunctions occurs, as described above, the fan drive extension time is variably set to match the period until the sensor output of the water level sensor becomes stable after the hot water supply alone operation, as described above. It is possible to avoid waste of equipment operation and malfunction of the equipment.
【図１】水位センサの配設位置の水温の直接検出値又は
推定検出値に基づき水位検出停止動作を行う一缶二水路
風呂給湯器の実施形態例を示すブロック構成図である。FIG. 1 is a block diagram illustrating an embodiment of a one-can-two-channel bath water heater that performs a water level detection stop operation based on a direct detection value or an estimated detection value of a water temperature at an arrangement position of a water level sensor.
【図２】第２と第３の実施形態例を示すブロック構成図
である。FIG. 2 is a block diagram showing a second and a third embodiment.
【図３】給気温に対応させてファン駆動延長時間が与え
られているファン駆動延長時間データの一例を示すグラ
フである。FIG. 3 is a graph showing an example of fan drive extension time data in which a fan drive extension time is given in accordance with a supply air temperature.
【図４】第４の実施形態例において特徴的な制御構成部
分を抜き出して示したブロック構成図である。FIG. 4 is a block diagram showing a control configuration of the fourth embodiment.
【図５】給湯単独運転により追い焚き熱交換器に与えら
れる追い焚き熱交換器の保有熱量の時間的変化の一例を
燃焼熱量毎に示すグラフである。FIG. 5 is a graph showing an example of a temporal change in the amount of heat retained by the reheating heat exchanger given to the reheating heat exchanger by the hot water supply alone operation for each combustion heat amount.
【図６】追い焚き熱交換器の保有熱量に応じてファン駆
動延長時間が与えられているファン駆動延長時間データ
の一例を示すグラフである。FIG. 6 is a graph showing an example of fan drive extension time data in which a fan drive extension time is given according to the amount of heat held by the reheating heat exchanger.
【図７】一缶二水路風呂給湯器のシステム構成例を示す
説明図である。FIG. 7 is an explanatory diagram showing a system configuration example of a one-can two-channel bath water heater.
【図８】自動運転動作の一例を示すフローチャートであ
る。FIG. 8 is a flowchart illustrating an example of an automatic driving operation.
【図９】水位センサのセンサ出力と浴槽水量の関係を示
すＰ−Ｑデータの一例を示すグラフである。FIG. 9 is a graph showing an example of PQ data indicating a relationship between a sensor output of a water level sensor and a bathtub water amount.
【図１０】従来の課題を示す説明図である。FIG. 10 is an explanatory diagram showing a conventional problem.
２ バーナー ３ 給湯熱交換器 ４ 追い焚き熱交換器 ７ 燃焼ファン １３ 給水通路 １４ 給湯通路 ２４ 追い焚き循環通路 ２５ 湯張り通路 ２８ 水位センサ ３７ 風呂温度センサ ４４ 給湯単独運転監視部 ４６ データ格納部 ４７ ファン駆動部 ４８ 水位検出停止部 ５０ 延長時間設定部 ５１ 時間計測部 2 Burner 3 Hot water supply heat exchanger 4 Reheating heat exchanger 7 Combustion fan 13 Water supply passage 14 Hot water supply passage 24 Reheating heating circulation passage 25 Filling passage 28 Water level sensor 37 Bath temperature sensor 44 Hot water supply independent operation monitoring unit 46 Data storage unit 47 Fan Drive unit 48 Water level detection stop unit 50 Extension time setting unit 51 Time measurement unit
───────────────────────────────────────────────────── フロントページの続き (72)発明者 山口 健生 神奈川県大和市深見台３丁目４番地 株式 会社ガスター内 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Takeo Yamaguchi 3-4 Fukamidai, Yamato City, Kanagawa Prefecture Inside Gaster Co., Ltd.
Claims (6)
湯通路へ送出する給湯熱交換器と、浴槽湯水の追い焚き
循環通路に組み込まれ追い焚き循環通路を循環する循環
湯水の追い焚きを行う追い焚き熱交換器と、追い焚き循
環通路に配設され湯水温度を検出する追い焚き循環通路
温度センサと、追い焚き循環通路又は追い焚き循環通路
に連通する連通通路に配設され浴槽の湯水の水位を水圧
により検出する水位センサとを備え、上記給湯熱交換器
と追い焚き熱交換器は一体化され、この一体化された給
湯熱交換器と追い焚き熱交換器を加熱する共通のバーナ
ーが設けられ、予め定められたタイミングで上記水位セ
ンサによる水位検出動作が行われる一缶二水路タイプの
風呂給湯器において、一缶二水路風呂給湯器が追い焚き
運転を行わず給湯運転だけを行う給湯単独運転を行って
いるか否かを監視する給湯単独運転監視部と；給湯単独
運転の停止後に水位センサの配設位置の水温を直接的に
検出した直接検出値あるいは水位センサの配設位置の水
温を推定検出した推定検出値が予め定めたしきい値に達
するまで、又は、上記しきい値に達してから予め定めた
余裕期間が経過するまで水位センサによる水位検出動作
を停止させる水位検出停止部と；を設けたことを特徴と
する一缶二水路風呂給湯器。1. A hot water supply heat exchanger for heating water supplied from a water supply passage and sending it out to the hot water supply passage, and a reheating of circulating hot water incorporated in the reheating circulation passage of the bathtub hot water and circulating in the reheating circulation passage. A reheating heat exchanger to be performed, a reheating circulation passage temperature sensor disposed in the reheating circulation passage to detect hot water temperature, and a hot water in a bath tub disposed in the reheating circulation passage or a communication passage communicating with the reheating circulation passage. A water level sensor for detecting the water level of the hot water by a water pressure, wherein the hot water supply heat exchanger and the reheating heat exchanger are integrated, and a common burner for heating the integrated hot water supply heat exchanger and the reheating heat exchanger. Is provided, and a water level detection operation is performed by the water level sensor at a predetermined timing. In the one-can-two-channel water heater, the one-can-two-channel bath water heater does not perform the reheating operation and performs the hot water supply operation. A hot water supply independent operation monitoring unit that monitors whether or not the hot water supply only operation in which only the hot water supply operation is performed; and a direct detection value or a direct detection value that directly detects a water temperature at a position where the water level sensor is disposed after the hot water supply independent operation is stopped. Stop the water level detection operation by the water level sensor until the estimated detection value obtained by estimating and detecting the water temperature at the installation position reaches a predetermined threshold value or until a predetermined allowance period elapses after reaching the threshold value. And a water level detection stop unit for controlling the water level.
湯通路へ送出する給湯熱交換器と、浴槽湯水の追い焚き
循環通路に組み込まれ追い焚き循環通路を循環する循環
湯水の追い焚きを行う追い焚き熱交換器と、追い焚き循
環通路又は追い焚き循環通路に連通する連通通路に配設
され浴槽の湯水の水位を水圧により検出する水位センサ
とを備え、上記給湯熱交換器と追い焚き熱交換器は一体
化され、この一体化された給湯熱交換器と追い焚き熱交
換器を加熱する共通のバーナーと、該バーナーへの給排
気を行う燃焼ファンとが設けられ、予め定められたタイ
ミングで上記水位センサによる水位検出動作が行われる
一缶二水路タイプの風呂給湯器において、一缶二水路風
呂給湯器が追い焚き運転を行わず給湯運転だけを行う給
湯単独運転を行っているか否かを監視する給湯単独運転
監視部と；給湯単独運転の停止後に燃焼ファンを継続駆
動させて追い焚き熱交換器を冷却するファン駆動部と；
給湯単独運転の停止後に水位センサの配設位置の水温を
直接的に検出した直接検出値あるいは水位センサの配設
位置の水温を推定検出した推定検出値が予め定めたしき
い値に達するまで、又は、上記しきい値に達してから予
め定めた余裕期間が経過するまで水位センサによる水位
検出動作を停止させる水位検出停止部と；を設けたこと
を特徴とする一缶二水路風呂給湯器。2. A hot water supply heat exchanger for heating water supplied from a water supply passage and sending it to the hot water supply passage, and a reheating of circulating hot water incorporated in the reheating circulation passage of the bathtub hot water and circulating through the reheating circulation passage. A reheating steam exchanger to be performed, and a water level sensor disposed in the reheating steam circulation passage or a communication passage communicating with the reheating heating circulation passage and detecting a water level of hot water in a bathtub by a water pressure, and the above-described hot water supply heat exchanger and reheating. The heat exchanger is integrated, a common burner that heats the integrated hot water supply heat exchanger and the reheating heat exchanger, and a combustion fan that supplies and exhausts air to and from the burner are provided. In the one-can-two-canal bath water heater in which the water level detection operation is performed by the water level sensor at the timing, the one-can-two-canal bath water heater performs only the hot-water supply operation without performing the reheating operation and performs the hot-water supply alone operation. A hot water supply independent operation monitoring unit that monitors whether or not the hot water supply operation is stopped; and a fan drive unit that continues to drive the combustion fan after the hot water supply independent operation is stopped to cool the reheating heat exchanger;
Until the direct detection value directly detecting the water temperature at the position where the water level sensor is disposed or the estimated detection value estimating the water temperature at the position where the water level sensor is disposed reaches a predetermined threshold after the stop of the hot water supply alone operation, A water level detection stop unit for stopping a water level detection operation by a water level sensor until a predetermined margin period elapses after the threshold value is reached, and a one-can-two-channel bath water heater.
検出する手段は追い焚き循環通路温度センサによって構
成され、水位センサの配設位置の水温を推定検出する手
段は、給湯単独運転が行われている給湯単独運転時間
と、給湯単独運転の燃焼運転情報とを少なくともパラメ
ータにして求められる追い焚き熱交換器の保有熱量に基
づき水位センサの配設位置の水温を推定検出する保有熱
量検出手段、あるいは、一缶二水路風呂給湯器の給気温
に基づき水位センサの配設位置の水温を推定検出する給
気温検出手段、あるいは、上記追い焚き熱交換器の保有
熱量と給気温を組み合わせて水位センサの配設位置の水
温を推定検出する保有熱量・給気温検出手段のうちのい
ずれか１つの手段により構成されていることを特徴とす
る請求項１又は請求項２記載の一缶二水路風呂給湯器。3. The means for directly detecting the water temperature at the position where the water level sensor is provided is constituted by a reheating circulating passage temperature sensor, and the means for estimating and detecting the water temperature at the position where the water level sensor is provided is such that the hot water supply alone operation is performed. Retained calorie detection for estimating and detecting the water temperature at the location of the water level sensor based on the retained calorie of the reheating heat exchanger determined using at least the hot water supply single operation time and the combustion operation information of the single hot water supply operation as parameters. Means, or air supply temperature detection means for estimating and detecting the water temperature at the location of the water level sensor based on the air supply temperature of the one-can two-channel bath water heater, or a combination of the heat quantity and the air supply temperature possessed by the reheating heat exchanger 2. The apparatus according to claim 1, wherein the water level sensor is configured by any one of a stored calorie / supply air temperature detecting means for estimating and detecting a water temperature at a position where the water level sensor is disposed. 2. One-can two-channel water heater.
湯通路へ送出する給湯熱交換器と、浴槽湯水の追い焚き
循環通路に組み込まれ追い焚き循環通路を循環する循環
湯水の追い焚きを行う追い焚き熱交換器と、追い焚き循
環通路又は追い焚き循環通路に連通する連通通路に配設
され浴槽の湯水の水位を水圧により検出する水位センサ
とを備え、上記給湯熱交換器と追い焚き熱交換器は一体
化され、この一体化された給湯熱交換器と追い焚き熱交
換器を加熱する共通のバーナーと、該バーナーへの給排
気を行う燃焼ファンとが設けられ、予め定められたタイ
ミングで上記水位センサによる水位検出動作が行われる
一缶二水路タイプの風呂給湯器において、一缶二水路風
呂給湯器が追い焚き運転を行わず給湯運転だけを行う給
湯単独運転を行っているか否かを監視する給湯単独運転
監視部と；給湯単独運転の停止後に予め定めたファン駆
動延長時間を経過するまで燃焼ファンを継続駆動させる
ファン駆動部と；給湯単独運転の停止後に燃焼ファンの
駆動が停止されるまで、又は、停止されてから予め定め
た余裕期間を経過するまで水位センサによる水位検出動
作を停止させる水位検出停止部と；を設けたことを特徴
とする一缶二水路風呂給湯器。4. A hot water supply heat exchanger for heating water supplied from a water supply passage and sending it out to the hot water supply passage, and a reheating of circulating hot water incorporated in the reheating circulation passage of the bathtub hot water and circulating through the reheating circulation passage. A reheating steam exchanger to be performed, and a water level sensor disposed in the reheating steam circulation passage or a communication passage communicating with the reheating heating circulation passage and detecting a water level of hot water in a bathtub by a water pressure, and the above-described hot water supply heat exchanger and reheating. The heat exchanger is integrated, a common burner that heats the integrated hot water supply heat exchanger and the reheating heat exchanger, and a combustion fan that supplies and exhausts air to and from the burner are provided. In the one-can-two-canal bath water heater in which the water level detection operation is performed by the water level sensor at the timing, the one-can-two-canal bath water heater performs only the hot-water supply operation without performing the reheating operation and performs the hot-water supply alone operation. A hot water supply independent operation monitoring unit that monitors whether or not the hot water supply operation is stopped; a fan drive unit that continuously drives the combustion fan until a predetermined fan drive extension time elapses after the stop of the hot water supply independent operation; A water level detection stop unit for stopping the water level detection operation by the water level sensor until the driving is stopped or until a predetermined margin period has elapsed after the driving is stopped; Water heater.
る給気温センサが設けられており、給気温センサが検出
する給気温に基づいてファン駆動延長時間を設定するフ
ァン駆動延長時間データが与えられ、上記給気温センサ
が検出する給気温に応じてファン駆動延長時間を可変設
定する延長時間設定部を設けたことを特徴とする請求項
４記載の一缶二水路風呂給湯器。5. A fan drive extension time data for setting a fan drive extension time based on a supply air temperature detected by a one-can, two-channel bath water heater. 5. A one-can, two-channel bath water heater according to claim 4, further comprising an extension time setting unit for variably setting a fan drive extension time in accordance with a supply air temperature detected by said supply air temperature sensor.
行っている時間を計測する時間計測手段と；少なくとも
給湯単独運転の燃焼熱量情報と給湯単独運転時間をパラ
メータとして給湯単独運転によるバーナーの燃焼熱によ
り追い焚き熱交換器に与えられる追い焚き熱交換器の保
有熱量を求める保有熱量データが与えられ、該保有熱量
データを求めるための前記給湯単独運転時のパラメータ
情報を取り込んで前記保有熱量データから追い焚き熱交
換器の保有熱量を求め、該保有熱量に応じたファン駆動
延長時間を可変設定する延長時間設定部を設けたことを
特徴とする請求項４記載の一缶二水路風呂給湯器。6. A time measuring means for measuring a time during which a one-can, two-channel bath water heater performs a single hot water supply operation; a burner for a single hot water supply single operation using at least combustion heat amount information of the single hot water supply operation and a single hot water supply operation time as parameters. The retained calorie data for determining the retained calorie of the reheater provided to the recuperating heat exchanger by the combustion heat of the heat exchanger is given, and the parameter information at the time of the hot water supply alone operation for determining the retained calorie data is taken in and the retained value is obtained. 5. The one-tank two-channel bath according to claim 4, further comprising an extension time setting unit for obtaining the heat quantity of the reheating heat exchanger from the heat quantity data and variably setting a fan drive extension time according to the heat quantity. Water heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33499396A JP3767959B2 (en) | 1996-11-29 | 1996-11-29 | One can two water bath hot water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33499396A JP3767959B2 (en) | 1996-11-29 | 1996-11-29 | One can two water bath hot water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10160244A true JPH10160244A (en) | 1998-06-19 |
| JP3767959B2 JP3767959B2 (en) | 2006-04-19 |
Family
ID=18283538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33499396A Expired - Fee Related JP3767959B2 (en) | 1996-11-29 | 1996-11-29 | One can two water bath hot water heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3767959B2 (en) |
-
1996
- 1996-11-29 JP JP33499396A patent/JP3767959B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3767959B2 (en) | 2006-04-19 |
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