JPH10227522A - One-boiler and twin-water-passage type bath hot water feeder - Google Patents
One-boiler and twin-water-passage type bath hot water feederInfo
- Publication number
- JPH10227522A JPH10227522A JP9044743A JP4474397A JPH10227522A JP H10227522 A JPH10227522 A JP H10227522A JP 9044743 A JP9044743 A JP 9044743A JP 4474397 A JP4474397 A JP 4474397A JP H10227522 A JPH10227522 A JP H10227522A
- Authority
- JP
- Japan
- Prior art keywords
- hot water
- water supply
- reheating
- heat exchanger
- bypass valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 693
- 238000003303 reheating Methods 0.000 claims description 280
- 238000010438 heat treatment Methods 0.000 claims description 56
- 238000012544 monitoring process Methods 0.000 claims description 45
- 238000002485 combustion reaction Methods 0.000 claims description 43
- 230000000717 retained effect Effects 0.000 claims description 32
- 230000007423 decrease Effects 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 9
- 239000008236 heating water Substances 0.000 claims description 7
- 238000005086 pumping Methods 0.000 claims description 3
- 238000009835 boiling Methods 0.000 abstract description 15
- 230000003247 decreasing effect Effects 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract 2
- 238000013500 data storage Methods 0.000 description 26
- 238000005259 measurement Methods 0.000 description 20
- 239000007789 gas Substances 0.000 description 12
- 238000004364 calculation method Methods 0.000 description 9
- 238000002474 experimental method Methods 0.000 description 9
- 238000010079 rubber tapping Methods 0.000 description 8
- 230000001276 controlling effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000011049 filling Methods 0.000 description 3
- 239000002737 fuel gas Substances 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Landscapes
- Control For Baths (AREA)
Abstract
Description
【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８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追い焚き熱交換
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. 8 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. In other words, 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 reheating heat exchanger is similarly mounted by penetrating a fin plate 5 with a refueling-side pipe. The burner 2 heats both the hot water supply heat exchanger 3 and the reheating 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
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バイパス弁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 passage 16 that short-circuits the inlet water supply passage 13 and the outlet hot water supply passage 14 is provided. The bypass passage 16 is provided with a bypass valve 17 that opens and closes the passage.
【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と循環ポンプ２０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２
４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 line 21, the circulation pump 20, the line 18, the reheating heat exchanger 4 and the line 23 make up the reheating circulation passage 2.
4 are configured.
【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の水位を検出する水位センサ２
８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. Water level sensor 2 for detecting the water level of 22
8 are provided.
【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に設けられて通水流量を制御
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 an incoming 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 hot water supply passage 14 to control the flow rate of water, and reference numeral 35 denotes a flow control valve provided in the hot water supply passage 14 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. Is a bath temperature sensor for detecting 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４２や、浴槽２２の風
呂の温度を設定する風呂温度設定手段４３や、浴槽２２
の湯水の水位を設定する風呂水位設定手段等が設けられ
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 includes a hot water supply temperature setting unit 42 for setting a hot water supply temperature, a bath temperature setting unit 43 for setting a bath temperature of the bathtub 22, and a bathtub 22.
A bath water level setting means for setting the water level of the hot water is provided.
【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、湯
張り運転や、追い焚き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 captures sensor output signals of various sensors and information of the remote controller 41, and executes various operation modes such as a hot water supply operation, a hot water filling operation, and a reheating operation in accordance with a predetermined sequence program. The operation is controlled as follows.
【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 hot water supply operation. 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、給湯湯温が給湯温度設定手段４２
に設定されている給湯設定温度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 hot water temperature is set to a hot water temperature setting means 42.
Proportional valve 12 so that the hot water supply set temperature set at
The amount of combustion heat of the burner 2 is controlled by controlling the valve opening amount (controlling the amount of gas supplied to the burner 2), and the hot water supply heat exchanger 3 is controlled.
Is heated by the combustion flame of the burner 2 to produce hot water of a set temperature, and this hot water is supplied to a hot water supply place through a 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、予
め定められたポストパージ期間（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
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. After that, when a predetermined post-purge period (for example, 5 minutes) has elapsed, the rotational drive of the combustion fan 7 is stopped to end the hot water supply operation and prepare for the next hot water supply.
【００１４】湯張り運転を行うときには、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 performing the filling operation, for example, 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 is turned on. When the flow of water 13 is detected, the combustion of the burner 2 is started in the same manner as in the above hot water supply 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、湯張り運転を終了す
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. End the operation.
【００１６】追い焚き運転を行うときには、循環ポンプ
２０を駆動させて浴槽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の循環湯水を加熱して追い焚きを行う。そして、風呂
温度センサ３７により検出される風呂温度が風呂温度設
定手段４３により設定されている設定温度に達したとき
に、バーナー２の燃焼を停止させ、追い焚き運転を終了
する。When the reheating operation is performed, the circulation pump 20 is driven to circulate the water in the bathtub 22 through the reheating circulation passage 24, the combustion of the burner 2 is started, and the reheating heat is generated by the combustion flame of the burner 2. The circulating hot and cold water of the exchanger 4 is heated to perform reheating. Then, when the bath temperature detected by the bath temperature sensor 37 reaches the set temperature set by the bath temperature setting means 43, the combustion of the burner 2 is stopped, and the reheating operation is ended.
【００１７】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
ストの低減が図れることになる。As described above, the one-can-two-channel water heater has a system in which the integrated hot water supply heat exchanger 3 and the reheat-fired heat exchanger 4 are heated using the common burner 2. The system configuration can be simplified as compared with the system in which the provided hot water heat exchanger and the reheater heat exchanger are each heated and burned using separate burners, and as a result, the size and cost of the system can be reduced. I can plan.
【００１８】[0018]
【発明が解決しようとする課題】ところで、一缶二水路
風呂給湯器が給湯運転を行わず追い焚き運転のみの追い
焚き単独運転を行っているときには、給湯熱交換器３内
に湯水が滞留している状態にあり、追い焚き運転による
バーナー２の燃焼火炎によって追い焚き熱交換器４だけ
でなく給湯熱交換器３も加熱されるので、上記給湯熱交
換器３内の滞留湯水は加熱され、この加熱によって給湯
熱交換器３内の滞留湯水の温度が上昇し非常に高温にな
る。By the way, when the one-can-two-channel bath water heater performs only the reheating operation without the hot water supply operation, the hot water stays in the hot water supply heat exchanger 3. And the combustion flame of the burner 2 by the reheating operation heats not only the reheating heat exchanger 4 but also the hot water supply heat exchanger 3, so that the retained hot water in the hot water supply heat exchanger 3 is heated, Due to this heating, the temperature of the retained hot water in the hot water supply heat exchanger 3 rises and becomes extremely high.
【００１９】このため、追い焚き単独運転終了直後に給
湯が行われると、上記追い焚き単独運転に起因して高温
に加熱された給湯熱交換器３内の湯が出湯し、湯の使用
者に高温出湯による不快感を与えてしまったり、高温の
湯によって湯の使用者に火傷を負わせてしまうといった
重大な問題を生じる虞がある。For this reason, when hot water is supplied immediately after the reheating alone operation is completed, the hot water in the hot water supply heat exchanger 3 heated to a high temperature due to the reheating alone operation is discharged to the user of the hot water. There is a possibility that serious problems such as giving discomfort due to high-temperature hot water and causing burns to a user of the hot water by the high-temperature hot water may occur.
【００２０】そこで、上記問題を回避する手段として、
例えば、追い焚き単独運転中にバイパス弁１７を開弁
し、追い焚き単独運転停止直後に出湯が行われるときに
は、給湯熱交換器３から流れ出た高温の湯にバイパス通
路１６から水を加え給湯通路１４の湯温を下げて上記高
温出湯の問題を回避する手段が提案されている。Therefore, as means for avoiding the above problem,
For example, when the bypass valve 17 is opened during the reheating alone operation and the hot water is supplied immediately after the reheating alone operation is stopped, the hot water flowing from the hot water supply heat exchanger 3 is added with water from the bypass passage 16 to add hot water to the hot water supply passage. Means for lowering the hot water temperature and avoiding the above-mentioned problem of hot water tapping have been proposed.
【００２１】ところで、追い焚き運転の終了後に、追い
焚き熱交換器４の後沸き（追い焚き運転の停止直後に追
い焚き熱交換器４の保有熱によって追い焚き熱交換器４
の滞留湯水が加熱される現象）によって追い焚き熱交換
器４の滞留湯水が高温になり、この高温の追い焚き熱交
換器４の湯が追い焚き運転の再開時に浴槽２２に噴出し
てしまうと、入浴者にかかる虞がある。この追い焚き熱
交換器４の後沸きに起因した問題を防止するために、追
い焚き運転の停止後に次に示すポストポンプを行うこと
が提案されている。After the reheating operation, after the reheating operation, the reheating of the reheating heat exchanger 4 is performed.
If the accumulated hot water in the reheating heat exchanger 4 becomes hot due to the phenomenon of the accumulated hot water being heated), and the hot water in the high-temperature reheating heat exchanger 4 blows out to the bathtub 22 when the reheating operation is restarted. There is a possibility that it may affect bathers. In order to prevent the problem caused by the post-boiling of the reheating heat exchanger 4, it has been proposed to perform the following post pump after stopping the reheating operation.
【００２２】上記ポストポンプとは、追い焚き運転が停
止した後に予め定められた期間（例えば、１０秒間）の
間、循環ポンプ２０を継続駆動させ追い焚き熱交換器４
に引き続き湯水を通し、この追い焚き熱交換器４の通水
によって追い焚き熱交換器４の保有熱を奪って追い焚き
熱交換器４を冷まし、追い焚き熱交換器４の後沸きを防
止するもので、上記追い焚き熱交換器４の後沸きに起因
した問題を回避することができる。The post-pump means that the circulation pump 20 is continuously driven for a predetermined period (for example, 10 seconds) after the reheating operation is stopped, and the reheating heat exchanger 4 is operated.
Then, hot water is passed through, and the heat of the reheating heat exchanger 4 is taken away by the flow of the reheating heat exchanger 4 to cool the reheating heat exchanger 4 and prevent the post-heating of the reheating heat exchanger 4 from boiling. Therefore, it is possible to avoid a problem caused by the post-boiling of the reheating heat exchanger 4.
【００２３】しかしながら、一缶二水路風呂給湯器で、
上記の如く、ポストポンプを行うと、給湯熱交換器３と
追い焚き熱交換器４が一体化されているので、追い焚き
熱交換器４の通水は追い焚き熱交換器４の保有熱だけで
なく、給湯熱交換器３の保有熱も奪っていく。このた
め、ポストポンプによって給湯熱交換器３の湯温が急激
に低下し、前記の如く、追い焚き単独運転に起因した高
温出湯を回避するために追い焚き単独運転停止後にバイ
パス弁１７を開弁したままにしておくと、ポストポンプ
に起因して冷めた給湯熱交換器３の湯にバイパス通路１
６から水が加えられることになり、追い焚き単独運転停
止後の給湯時に、給湯設定温度よりも大幅に低下したア
ンダーシュートの湯が出湯するアンダーシュート出湯の
問題が生じる。However, with a one-can two-channel bath water heater,
As described above, when the post-pump is performed, since the hot water supply heat exchanger 3 and the reheating heat exchanger 4 are integrated, the flow of water in the reheating heat exchanger 4 is only the heat retained in the reheating heat exchanger 4. Instead, it also takes away the heat possessed by the hot water supply heat exchanger 3. For this reason, the temperature of the hot water in the hot water supply heat exchanger 3 is rapidly lowered by the post pump, and as described above, the bypass valve 17 is opened after the independent operation of the additional heating is stopped in order to avoid the hot water supply caused by the independent operation of the additional heating. If the hot water in the hot water supply heat exchanger 3 is cooled by the post pump,
6, the water is added from the point 6, and when the hot water is supplied after the stop-only operation, the undershoot hot water, which is significantly lower than the set hot water supply temperature, has a problem of undershoot hot water.
【００２４】この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、ポストポンプを行って追
い焚き運転後の追い焚き熱交換器の後沸きを防止して追
い焚き熱交換器の後沸きに起因した問題を回避すること
ができ、その上、追い焚き単独運転停止直後の高温出湯
やアンダーシュート出湯を回避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 post-boiling of a reheating heat exchanger after a reheating operation by performing a post-pump operation. Another object of the present invention is to provide a one-can-two-channel bath water heater that can avoid the problem caused by the post-boiling, and can avoid the hot or undershoot hot water immediately after the stop of the independent heating operation.
【００２５】[0025]
【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
から導かれる水を加熱して湯を給湯通路へ供給する給湯
熱交換器と、上記給湯熱交換器の入側の給水通路と出側
の給湯通路を短絡するバイパス通路と、該バイパス通路
の開閉を行うバイパス弁と、浴槽湯水の追い焚き循環通
路に組み込まれる循環ポンプと、上記追い焚き循環通路
に組み込まれ上記循環ポンプの駆動により追い焚き循環
通路を循環する循環湯水を追い焚きする追い焚き熱交換
器とを有し、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
交換器を共通に燃焼加熱するバーナーが設けられてお
り、追い焚き運転の停止後に循環ポンプを継続駆動する
ポストポンプ制御と、給湯運転を行わず追い焚き運転だ
けを行う追い焚き単独運転時に上記バイパス弁を開弁す
るバイパス弁の開弁制御とを行う一缶二水路風呂給湯器
であって、追い焚き単独運転が行われているか否かを監
視する追い焚き単独運転監視部と；バイパス弁閉弁時間
が予め与えられており、上記追い焚き単独運転監視部に
監視された追い焚き単独運転が停止してからの経過時間
が上記バイパス弁閉弁時間に達したときにバイパス弁を
閉弁させるバイパス弁制御部と；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 aspect of the present invention provides a hot water supply heat exchanger that heats water guided from a water supply passage and supplies hot water to the hot water supply passage, and short-circuits an inlet-side water supply passage and an outlet-side hot water supply passage of the hot water supply heat exchanger. A bypass passage, a bypass valve for opening and closing the bypass passage, a circulation pump incorporated in the reheating circulation passage of the bathtub hot water, and a circulation pump incorporated in the reheating circulation passage and driven by the circulation pump to circulate the reheating circulation passage. And a reheating heat exchanger for reheating the circulating hot and cold water.The above-mentioned 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 common. There is a burner that burns and heats the circulating pump after the stop of the reheating operation. A single-tank two-channel bath water heater for controlling the opening of a bypass valve for opening a sluice valve, and a reheating single operation monitoring unit for monitoring whether a reheating alone operation is performed; A valve closing time is given in advance, and the bypass valve is closed when the elapsed time from the stop of the additional heating alone operation monitored by the additional heating alone operation monitoring unit reaches the above bypass valve closing time. And a bypass valve control section for causing the above problem to be solved.
【００２６】第２の発明は、第１の発明の構成に加え
て、給湯温度を設定する給湯温度設定手段が備えられ、
上記給湯温度設定手段に設定されている給湯設定温度が
高くなるに従ってバイパス弁閉弁時間を短くする方向に
可変設定する閉弁時間可変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 second aspect, in addition to the configuration of the first aspect, a hot water temperature setting means for setting a hot water temperature is provided.
The above-mentioned object is achieved by providing a valve closing time variable setting unit that variably sets the bypass valve closing time in a direction to shorten the valve closing time as the hot water supply setting temperature set in the hot water supply temperature setting unit increases.
【００２７】第３の発明は、第１の発明の構成に加え
て、一缶二水路風呂給湯器が追い焚き単独運転を行って
いる時間を計測する時間計測部と；追い焚き単独運転時
の燃焼熱量情報と上記時間計測部により計測された追い
焚き単独運転時間をパラメータとして追い焚き単独運転
によるバーナーの燃焼熱により給湯熱交換器に与えられ
た給湯熱交換器の保有熱量を求め、該保有熱量に応じて
バイパス弁閉弁時間を可変設定する閉弁時間可変設定部
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。[0027] A third aspect of the present invention, in addition to the configuration of the first aspect, is a time measuring unit for measuring the time during which the one-can-two-channel bath water heater performs the reheating alone operation; The amount of heat of the hot water supply heat exchanger given to the hot water supply heat exchanger by the combustion heat of the burner by the additional heating alone operation is used as a parameter, using the combustion heat amount information and the additional heating alone operation time measured by the time measuring unit as a parameter. The above-mentioned problem is solved by a configuration in which a valve closing time variable setting unit that variably sets the valve closing time according to the amount of heat is provided.
【００２８】第４の発明は、上記第１の発明の構成に加
えて、ポストポンプ中に追い焚き循環通路を循環する循
環湯水の温度を検出する循環通路温度検出手段が設けら
れ、上記循環通路温度検出手段が検出する温度に基づき
上記検出温度が高くなるに従ってバイパス弁閉弁時間を
長くする方向に可変設定する閉弁時間可変設定部を設け
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 fourth aspect of the present invention, in addition to the configuration of the first aspect, a circulation passage temperature detecting means for detecting the temperature of circulating hot and cold water circulating in the post-pumping circulation passage in the post pump is provided. The above object is achieved by a configuration in which a valve closing time variable setting unit that variably sets the bypass valve closing time in a direction to increase the valve closing time as the detected temperature increases based on the temperature detected by the temperature detecting means is provided.
【００２９】第５の発明は、給水通路から導かれる水を
加熱して湯を給湯通路へ供給する給湯熱交換器と、上記
給湯熱交換器の入側の給水通路と出側の給湯通路を短絡
するバイパス通路と、該バイパス通路の開閉を行うバイ
パス弁と、浴槽湯水の追い焚き循環通路に組み込まれる
循環ポンプと、上記追い焚き循環通路に組み込まれ上記
循環ポンプの駆動により追い焚き循環通路を循環する循
環湯水を追い焚きする追い焚き熱交換器とを有し、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共通に燃
焼加熱するバーナーが設けられており、追い焚き運転の
停止後に循環ポンプを継続駆動するポストポンプ制御
と、給湯運転を行わず追い焚き運転だけを行う追い焚き
単独運転時に上記バイパス弁を開弁させるバイパス弁の
開弁制御とを行う一缶二水路風呂給湯器であって、追い
焚き単独運転が行われているか否かを監視する追い焚き
単独運転監視部と；給湯熱交換器の湯水温を検出する給
湯熱交換器湯水温度検出手段と；バイパス弁閉弁温度が
予め与えられ、追い焚き単独運転の停止後に上記給湯熱
交換器湯水温度検出手段が検出する湯水温度が上記バイ
パス弁閉弁温度に低下したときにバイパス弁を閉弁する
バイパス弁制御部と；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 fifth aspect of the present invention, there is provided a hot water supply heat exchanger for heating water guided from a water supply passage and supplying hot water to the hot water supply passage, and a hot water supply passage on an inlet side and an outlet side of the hot water supply heat exchanger. A bypass passage that short-circuits, a bypass valve that opens and closes the bypass passage, a circulation pump that is incorporated in the reheating circulation passage of the bathtub hot water, and a reheating circulation passage that is incorporated in the reheating circulation passage and that is driven by the circulation pump. It has a reheating heat exchanger for reheating the circulating hot and cold water, and 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 combined. A common burner is provided for combustion and heating.The post-pump control that continuously drives the circulation pump after the reheating operation is stopped, and the above-mentioned burner is used during the reheating alone operation that performs only the reheating operation without performing the hot water supply operation. A single-can, two-channel bath water heater for performing opening control of a bypass valve for opening a pass valve, and a reheating independent operation monitoring unit for monitoring whether or not reheating alone operation is performed; A hot-water supply heat exchanger hot-water temperature detecting means for detecting the hot-water temperature of the exchanger; and a bypass valve closing valve temperature is given in advance, and the hot-water temperature detected by the hot-water supply heat exchanger hot-water temperature detecting means after the stop-heating alone operation is stopped. And a bypass valve control unit that closes the bypass valve when the temperature of the bypass valve closes.
【００３０】第６の発明は、給水通路から導かれる水を
加熱して湯を給湯通路へ供給する給湯熱交換器と、上記
給湯熱交換器の入側の給水通路と出側の給湯通路を短絡
するバイパス通路と、該バイパス通路に介設されるバイ
パス弁と、浴槽湯水の追い焚き循環通路に組み込まれる
循環ポンプと、上記追い焚き循環通路に組み込まれ上記
循環ポンプの駆動により追い焚き循環通路を循環する循
環湯水を追い焚きする追い焚き熱交換器とを有し、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共通に燃
焼加熱するバーナーが設けられており、追い焚き運転の
停止後に循環ポンプを継続駆動するポストポンプ制御
と、給湯運転を行わず追い焚き運転だけを行う追い焚き
単独運転時に上記バイパス弁を開弁させるバイパス弁の
開弁制御とを行う一缶二水路風呂給湯器であって、バイ
パス弁は開弁量によってバイパス通路の通水流量を連続
的に又は段階的に可変することができる流量制御弁によ
り構成されており、追い焚き単独運転が停止してからの
経過時間に基づいてバイパス弁の開弁量を連続的に又は
段階的に絞っていきバイパス弁を閉弁させるための開弁
量制御データが与えられ、追い焚き単独運転の停止後
に、追い焚き単独運転が停止してからの経過時間と上記
開弁量制御データに基づいてバイパス弁の開弁量を連続
的に又は段階的に絞っていきバイパス弁を閉弁するバイ
パス弁制御部が設けら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 sixth aspect of the present invention, there is provided a hot water supply heat exchanger for heating water guided from a water supply passage and supplying hot water to the hot water supply passage, and a hot water supply passage on an inlet side and an outlet side of the hot water supply heat exchanger. A bypass passage to be short-circuited, a bypass valve interposed in the bypass passage, a circulation pump incorporated in the reheating circulation passage of the bathtub hot water, and a reheating circulation passage incorporated in the reheating circulation passage and driven by the circulation pump. And a reheating heat exchanger for reheating the circulating hot and cold water, wherein 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 integrated. There is a burner that burns and heats in common.The post pump control that continuously drives the circulating pump after the stop of the reheating operation, and the above-mentioned burner during the reheating alone operation that performs only the reheating operation without performing the hot water supply operation. A one-can-two-channel bath water heater for performing opening control of a bypass valve for opening a pass valve, wherein the bypass valve continuously or stepwise varies the flow rate of water in the bypass passage according to the opening amount. To control the opening amount of the bypass valve continuously or stepwise based on the elapsed time from the stoppage of the reheating alone operation to close the bypass valve. The opening amount control data of the bypass valve is given, and after the stop-only operation is stopped, the opening amount of the bypass valve is continuously adjusted based on the elapsed time since the stop-only operation is stopped and the opening amount control data. Alternatively, the above-described problem is solved by a configuration in which a bypass valve control unit that closes the bypass valve in a stepwise manner is provided.
【００３１】第７の発明は、給水通路から導かれる水を
加熱して湯を給湯通路へ供給する給湯熱交換器と、上記
給湯熱交換器の入側の給水通路と出側の給湯通路を短絡
するバイパス通路と、該バイパス通路に介設されるバイ
パス弁と、浴槽湯水の追い焚き循環通路に組み込まれる
循環ポンプと、上記追い焚き循環通路に組み込まれ上記
循環ポンプの駆動により追い焚き循環通路を循環する循
環湯水を追い焚きする追い焚き熱交換器とを有し、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共通に燃
焼加熱するバーナーが設けられており、追い焚き運転の
停止後に循環ポンプを継続駆動するポストポンプ制御
と、給湯運転を行わず追い焚き運転だけを行う追い焚き
単独運転時に上記バイパス弁を開弁させるバイパス弁の
開弁制御とを行う一缶二水路風呂給湯器であって、バイ
パス弁は開弁量によってバイパス通路の通水流量を連続
的に又は段階的に可変することができる流量制御弁によ
り構成され、また、給湯熱交換器の湯温を検出するため
の給湯熱交換器湯水温度検出手段が設けられており、該
給湯熱交換器湯水温度検出手段が検出する給湯熱交換器
湯温が低下するに従ってバイパス弁の開弁量を連続的に
又は段階的に減少させるための開弁量制御データが与え
られ、追い焚き単独運転の停止後に、上記給湯熱交換器
湯水温度検出手段により検出された給湯熱交換器湯温と
開弁量制御データに基づいてバイパス弁の開弁量を連続
的に又は段階的に絞っていきバイパス弁を閉弁するバイ
パス弁制御部が設けら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 seventh aspect of the present invention, there is provided a hot water supply heat exchanger for heating water guided from a water supply passage and supplying hot water to the hot water supply passage, and a water supply passage on the inlet side and a hot water supply passage on the outlet side of the heat exchanger. A bypass passage to be short-circuited, a bypass valve interposed in the bypass passage, a circulation pump incorporated in the reheating circulation passage of the bathtub hot water, and a reheating circulation passage incorporated in the reheating circulation passage and driven by the circulation pump. And a reheating heat exchanger for reheating the circulating hot and cold water, wherein 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 integrated. There is a burner that burns and heats in common.The post pump control that continuously drives the circulating pump after the stop of the reheating operation, and the above-mentioned burner during the reheating alone operation that performs only the reheating operation without performing the hot water supply operation. A one-can-two-channel bath water heater for performing opening control of a bypass valve for opening a pass valve, wherein the bypass valve continuously or stepwise varies the flow rate of water in the bypass passage according to the opening amount. And a hot water supply heat exchanger for detecting the hot water temperature of the hot water supply heat exchanger, and a hot water supply detected by the hot water supply heat exchanger hot water temperature detection means. Opening amount control data for continuously or stepwise reducing the opening amount of the bypass valve as the heat exchanger hot water temperature decreases is provided, and after the reheating alone operation is stopped, the hot water supply heat exchanger hot water A bypass valve control unit that continuously or stepwise reduces the opening amount of the bypass valve based on the hot water supply heat exchanger hot water temperature detected by the temperature detecting means and the valve opening control data and closes the bypass valve. The provided configuration And a means for solving the problems I.
【００３２】上記構成の発明において、例えば、一缶二
水路風呂給湯器は、追い焚き単独運転を行った後に、循
環ポンプを継続駆動するポストポンプを行う。ポストポ
ンプを行うことによって、追い焚き熱交換器には追い焚
き運転時に引き続き湯水が流れ、この通水によって追い
焚き熱交換器の保有熱が奪われて追い焚き熱交換器の後
沸きが回避される。この追い焚き熱交換器の通水は追い
焚き熱交換器と一体化されている給湯熱交換器の保有熱
も奪っていくので、給湯熱交換器の湯の温度を低下させ
る。In the invention having the above structure, for example, the one-can-two-channel bath water heater performs post-pump for continuously driving the circulating pump after performing the reheating alone operation. By performing the post pump, hot water flows continuously to the reheating heat exchanger during the reheating operation, and this flow of water removes the retained heat of the reheating heat exchanger and avoids post-boiling of the reheating heat exchanger. You. The flow of water in the reheating heat exchanger also removes the heat possessed by the hot water supply heat exchanger integrated with the reheating heat exchanger, thereby lowering the temperature of the hot water in the hot water supply heat exchanger.
【００３３】この発明の一缶二水路風呂給湯器にはバイ
パス弁制御部が設けられており、このバイパス弁制御部
は、例えば、追い焚き単独運転停止後に予め定めた期間
を経過したときに（例えば、追い焚き単独運転が停止し
てから予め定めたバイパス弁閉弁時間が経過したとき
に、又は、給湯熱交換器湯水温度検出手段が検出する給
湯熱交換器の湯温が予め定めたバイパス弁閉弁温度に低
下したときに）、バイパス弁を閉弁する。The one-tank two-channel bath water heater of the present invention is provided with a bypass valve control unit. The bypass valve control unit, for example, when a predetermined period has elapsed after the stoppage of the reheating alone operation ( For example, when a predetermined bypass valve closing time elapses after the reheating alone operation is stopped, or when the hot water temperature of the hot water supply heat exchanger detected by the hot water supply heat exchanger hot water temperature detecting means is a predetermined bypass. When the valve closing temperature has dropped), the bypass valve is closed.
【００３４】上記追い焚き単独運転停止後のバイパス弁
の閉弁タイミングは、追い焚き単独運転に起因した高温
出湯を回避することができ、かつ、ポストポンプに起因
したアンダーシュート出湯を回避することができるタイ
ミングに設定されている。The closing timing of the bypass valve after the above-mentioned reheating alone operation is stopped can avoid hot water tapping caused by the reheating alone operation and avoid undershoot tapping caused by the post pump. The timing is set to be possible.
【００３５】このように、バイパス弁制御部が追い焚き
単独運転停止後にバイパス弁を閉弁させることによっ
て、ポストポンプにより冷めた給湯熱交換器の湯にバイ
パス通路から水が加えられてアンダーシュートの湯が出
湯するのが回避される。As described above, the bypass valve control section closes the bypass valve after the reheating operation is stopped, so that water is added from the bypass passage to the hot water of the hot water supply heat exchanger cooled by the post pump, and the undershoot occurs. Hot water is avoided.
【００３６】もちろん、一缶二水路風呂給湯器は追い焚
き単独運転を行っているときにバイパス弁を開弁する。
このように、追い焚き単独運転中にバイパス弁を開弁さ
せることによって、追い焚き単独運転停止直後に給湯が
行われるときには、追い焚き単独運転に起因した給湯熱
交換器の高温の湯にバイパス通路から水が加えられ湯温
を下げて高温出湯が回避される。Of course, the one-can-two-channel bath water heater opens the bypass valve during the reheating operation alone.
As described above, by opening the bypass valve during the reheating alone operation, when hot water is supplied immediately after the reheating alone operation is stopped, the hot water supply heat exchanger of the hot water supply heat exchanger caused by the reheating alone operation bypasses the hot water. Water is added to the hot water to lower the hot water temperature to avoid hot water tapping.
【００３７】[0037]
【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.
【００３８】第１の実施形態例の一缶二水路風呂給湯器
（器具）は前記図８に示すシステム構成を有し、この実
施形態例において特徴的な制御装置４０は、図１の実線
に示すように、燃焼制御部４５と追い焚き単独運転監視
部４６とバイパス弁制御部４７とデータ格納部４８と時
間計測部５０とバイパス弁開弁部５１を有して構成され
ている。なお、図８に示す一缶二水路風呂給湯器のシス
テム構成の説明は前述したのでその重複説明は省略す
る。The one-tank two-channel bath water heater (apparatus) of the first embodiment has the system configuration shown in FIG. 8, and the characteristic control device 40 in this embodiment is shown by a solid line in FIG. As shown in the figure, the system includes a combustion control unit 45, a reheating independent operation monitoring unit 46, a bypass valve control unit 47, a data storage unit 48, a time measuring unit 50, and a bypass valve opening unit 51. Note that the description of the system configuration of the one-can-two-channel bath water heater shown in FIG.
【００３９】上記燃焼制御部４５には、給湯や、湯張り
や、追い焚きや、追い焚き運転の停止後に循環ポンプ２
０の継続駆動を行うポストポンプ運転等の様々な器具運
転のシーケンスプログラムが与えられており、燃焼制御
部４５は風呂温度センサ３７等の様々なセンサ出力やリ
モコン４１の情報を取り込み、それら取り込んだ情報に
基づき前記シーケンスプログラムに従って器具運転動作
を行う。After the stop of the hot water supply, hot water filling, reheating, or reheating operation, the combustion controller 45
A sequence program of various appliance operations such as a post-pump operation for continuously driving 0 is provided, and the combustion control unit 45 captures various sensor outputs such as the bath temperature sensor 37 and information of the remote controller 41 and captures them. The appliance operation is performed according to the sequence program based on the information.
【００４０】追い焚き単独運転監視部４６は、上記燃焼
制御部４５の動作情報を取り込み、この取り込んだ燃焼
制御部４５の情報に基づいて、バーナー２の燃焼が検知
されて水量センサ３１が給水通路１３の通水を検知して
おらず水流センサ３６が追い焚き循環通路２４の循環湯
水の通水を検知しているときには、給湯運転が行われて
おらず追い焚き運転のみの追い焚き単独運転が行われて
いると検知し、それ以外のときには追い焚き単独運転が
行われていないと検知する。The reheating independent operation monitoring unit 46 fetches the operation information of the combustion control unit 45, and based on the fetched information of the combustion control unit 45, detects the combustion of the burner 2 and sets the water amount sensor 31 to the water supply passage. When the water flow sensor 36 does not detect the flow of water and the water flow sensor 36 detects the flow of the circulating hot water in the reheating circulation passage 24, the reheating alone operation only for the reheating operation without performing the hot water supply operation is performed. It is detected that the operation is being performed, and otherwise, it is detected that the reheating alone operation is not being performed.
【００４１】バイパス弁開弁部５１には追い焚き単独運
転中にバイパス弁１７を開弁制御するためのシーケンス
プログラムが予め定めて与えられており、バイパス弁開
弁部５１は上記追い焚き単独運転監視部４６の監視情報
を取り込み、この追い焚き単独運転監視部４６の監視情
報に基づき、器具が追い焚き単独運転を行っていると検
知したときには、上記バイパス弁１７の開弁制御のシー
ケンスプログラムに従ってバイパス弁１７の開弁制御を
行う。なお、バイパス弁１７を開弁する制御手段には様
々な手段が提案されており、この実施形態例では、それ
ら提案手段のうちのいずれの手段を用いてバイパス弁１
７の開弁制御を行ってもよく、ここでは、そのバイパス
弁１７の開弁制御手段の説明は省略する。The bypass valve opening unit 51 is provided with a predetermined sequence program for controlling the opening of the bypass valve 17 during the reheating alone operation. The bypass valve opening unit 51 performs the reheating alone operation. The monitoring information of the monitoring unit 46 is fetched, and when it is detected based on the monitoring information of the reheating independent operation monitoring unit 46 that the appliance is performing the reheating alone operation, according to the sequence program of the valve opening control of the bypass valve 17 described above. The opening control of the bypass valve 17 is performed. Note that various means have been proposed as control means for opening the bypass valve 17, and in this embodiment, the bypass valve 1 is provided by using any of the proposed means.
7 may be performed, and the description of the valve opening control means of the bypass valve 17 will be omitted.
【００４２】データ格納部４８は記憶装置であり、デー
タ格納部４８には予め定められたバイパス弁閉弁時間ｔ
bcが格納されている。このバイパス弁閉弁時間ｔbcは追
い焚き単独運転の停止後にバイパス弁１７の閉弁タイミ
ングを決定するための時間であり、追い焚き単独運転の
停止後に、バイパス弁１７を閉弁することによって、給
湯設定温度よりも予め定めた許容温度（例えば、３℃）
を越えて低めのアンダーシュートの湯の出湯を回避する
ことができ、しかも、バイパス弁１７を閉弁させても給
湯設定温度よりも予め定めた許容温度（例えば、３℃）
を越えて高温の湯が出湯しないようなバイパス弁１７の
閉弁タイミングが、ポストポンプに起因した給湯熱交換
器３の湯温の低下を考慮した実験や演算等によって時間
により予め求められ、その求めた時間がデータ格納部４
８にバイパス弁閉弁時間ｔbcとして格納される。The data storage unit 48 is a storage device, and the data storage unit 48 has a predetermined bypass valve closing time t.
bc is stored. The bypass valve closing time tbc is a time for determining the closing timing of the bypass valve 17 after the stop-only operation is stopped, and by closing the bypass valve 17 after the stop-only operation is stopped, the hot water supply is completed. Allowable temperature (for example, 3 ° C.) that is set beforehand than the set temperature
, It is possible to avoid the flow of hot water with a lower undershoot, and even if the bypass valve 17 is closed, a predetermined allowable temperature (for example, 3 ° C.) higher than the set hot water supply temperature.
The closing timing of the bypass valve 17 such that the hot water does not flow out of the hot water is determined in advance by an experiment, calculation, or the like in consideration of a decrease in the hot water temperature of the hot water supply heat exchanger 3 due to the post pump. The obtained time is the data storage unit 4
8 is stored as the bypass valve closing time tbc.
【００４３】バイパス弁制御部４７は、前記追い焚き単
独運転監視部４６の監視情報を取り込み、この取り込ん
だ情報に基づき追い焚き単独運転が終了したと検知した
ときに時間計測部５０に追い焚き単独運転が停止してか
らの経過時間の計測を開始させる。また、バイパス弁制
御部４７は上記データ格納部４８から前記バイパス弁閉
弁時間ｔbcを読み出す。The bypass valve control unit 47 fetches the monitoring information of the reheating alone operation monitoring unit 46, and when it detects that the reheating alone operation has been completed based on the acquired information, the time measuring unit 50 outputs the reheating only operation. The measurement of the elapsed time since the operation was stopped is started. Further, the bypass valve control unit 47 reads the bypass valve closing time tbc from the data storage unit 48.
【００４４】そして、バイパス弁制御部４７は上記時間
計測部５０の計測時間を時々刻々と取り込み、この取り
込んだ計測時間を上記バイパス弁閉弁時間ｔbcに比較
し、時間計測部５０の計測時間がバイパス弁閉弁時間ｔ
bcに達したと判断したときに、バイパス弁１７を閉弁し
ても追い焚き単独運転に起因した高温出湯を回避するこ
とができ、しかも、バイパス弁１７を閉弁することによ
ってポストポンプに起因したアンダーシュートの湯が出
湯するのを回避することができると判断してバイパス弁
１７を閉弁させる。The bypass valve control unit 47 fetches the measurement time of the time measurement unit 50 every moment, compares the fetched measurement time with the bypass valve closing time tbc, and calculates the measurement time of the time measurement unit 50. Bypass valve closing time t
When it is determined that the temperature has reached bc, even if the bypass valve 17 is closed, it is possible to avoid high-temperature hot-water supply caused by the reheating alone operation. The bypass valve 17 is closed when it is determined that the undershot hot water can be prevented from flowing out.
【００４５】この実施形態例によれば、バイパス弁制御
部４７を設けて、バイパス弁制御部４７によって追い焚
き単独運転が停止してから予め定めたバイパス弁閉弁時
間ｔbcを経過したときにバイパス弁１７を閉弁させる構
成にしたので、次のような効果を奏することができる。
すなわち、追い焚き単独運転に起因した高温出湯を回避
するために追い焚き単独運転中にバイパス弁１７の開弁
制御が行われるが、追い焚き単独運転停止後にはポスト
ポンプが行われるので、ポストポンプに起因して給湯熱
交換器３の湯温が急激に低下してバイパス弁１７を開弁
したままでは上記冷めた給湯熱交換器３の湯にバイパス
通路１６から水が加えられアンダーシュートの湯が出湯
する虞がある。According to this embodiment, the bypass valve control section 47 is provided, and the bypass valve control section 47 performs the bypass operation when a predetermined bypass valve closing time tbc elapses after the reheating only operation is stopped by the bypass valve control section 47. Since the valve 17 is configured to be closed, the following effects can be obtained.
That is, the valve opening control of the bypass valve 17 is performed during the reheating alone operation in order to avoid high-temperature hot water supply caused by the reheating alone operation, but the post pump is performed after the reheating alone operation is stopped. As a result, the temperature of the hot water in the hot water supply heat exchanger 3 drops rapidly, and if the bypass valve 17 remains open, water is added to the cooled hot water in the hot water supply heat exchanger 3 from the bypass passage 16 and the undershoot hot water There is a risk of hot water.
【００４６】このため、上記実施形態例に示したよう
に、アンダーシュートの湯が出湯するのを回避でき、か
つ、バイパス弁１７の閉弁による高温出湯を防止するこ
とができるバイパス弁１７の閉弁タイミングを時間によ
り求めて、追い焚き単独運転停止後に上記求めた時間
（バイパス弁閉弁時間ｔbc）が停止した後にバイパス弁
１７を閉弁させることによって、上記アンダーシュート
出湯を回避することができる。For this reason, as shown in the above embodiment, the undershoot hot water can be prevented from flowing out, and the bypass valve 17 can be closed at a high temperature by closing the bypass valve 17. By obtaining the valve timing by time and closing the bypass valve 17 after the above calculated time (bypass valve closing time tbc) has been stopped after the reheating alone operation is stopped, the undershoot hot water can be avoided. .
【００４７】もちろん、追い焚き単独運転中にバイパス
弁１７が開弁されることによって、追い焚き単独運転停
止直後に給湯が行われるときには、給湯熱交換器３の高
温の湯にバイパス通路１６から水が加えられて湯温を下
げ、追い焚き単独運転に起因した高温出湯を回避するこ
とができる。また、追い焚き運転の停止後に循環ポンプ
２０を継続駆動するポストポンプを行うので、追い焚き
熱交換器４の後沸きを防止することができ、追い焚き熱
交換器４の後沸きに起因した浴槽２２への高温湯の噴出
を防止することができる。Of course, when hot water is supplied immediately after the stop-heating alone operation is stopped by opening the bypass valve 17 during the additional heating alone operation, the hot water of the hot water supply heat exchanger 3 is supplied from the bypass passage 16 to the hot water. Is added to lower the hot water temperature, and high-temperature hot water discharge caused by reheating alone operation can be avoided. Further, since the post pump for continuously driving the circulation pump 20 is performed after the stop of the reheating operation, the post-boiling of the reheating heat exchanger 4 can be prevented, and the bathtub caused by the post-boiling of the reheating heat exchanger 4 can be prevented. It is possible to prevent the high-temperature hot water from jetting to the nozzle 22.
【００４８】上記のように、追い焚き単独運転停止後に
給湯が行われるときに、高温出湯とアンダーシュート出
湯を共に回避することができるので、追い焚き単独運転
停止後に、湯の利用者に高温出湯やアンダーシュート出
湯による不快感を与えるのを防止することができる。As described above, when hot water is supplied after the reheating alone operation is stopped, high-temperature hot water and undershoot hot water can both be avoided. It is possible to prevent the discomfort caused by tapping and undershoot.
【００４９】以下に、第２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、前記第１の実施
形態例の構成に加えて、図１の点線に示すように、閉弁
時間可変設定部５２を設け、この閉弁時間可変設定部５
２が給湯温度設定手段４２に設定されている給湯設定温
度に基づいてバイパス弁閉弁時間ｔbcを可変設定しデー
タ格納部４８のバイパス弁閉弁時間ｔbcを自動更新する
構成にしたことである。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 second embodiment will be described. A characteristic of this embodiment is that, in addition to the configuration of the first embodiment, a variable valve closing time setting section 52 is provided as shown by a dotted line in FIG. 5
2 is that the bypass valve closing time tbc is variably set based on the hot water supply setting temperature set in the hot water supply temperature setting means 42, and the bypass valve closing time tbc in the data storage unit 48 is automatically updated. The other configuration is the same as that of the first embodiment, and the description of the common parts will not be repeated.
【００５０】ところで、追い焚き単独運転停止後に、よ
り確実に高温出湯とアンダーシュート出湯とを共に回避
して給湯設定温度に近い湯を出湯させるためには、給湯
温度設定手段４２に設定されている給湯設定温度に基づ
いて追い焚き単独運転停止後のバイパス弁１７の閉弁タ
イミングを可変設定する必要がある。By the way, in order to more reliably avoid both high-temperature hot water supply and undershoot hot water supply and to discharge hot water close to the hot water supply set temperature after the reheating alone operation stop, the hot water supply temperature setting means 42 is set. It is necessary to variably set the valve closing timing of the bypass valve 17 after the reheating alone operation is stopped based on the hot water supply set temperature.
【００５１】そこで、この実施形態例では、給湯温度設
定手段４２に設定されている給湯設定温度Ｔsが高くな
るに従ってバイパス弁閉弁時間ｔbcを短くする方向に可
変設定し、バイパス弁１７の閉弁タイミングを早めて高
めの湯を出湯させるようにし、反対に、給湯設定温度Ｔ
sが低くなるに従ってバイパス弁閉弁時間ｔbcを長くす
る方向に可変設定し、追い焚き単独運転停止後にバイパ
ス弁１７の閉弁タイミングを遅らせて低めの湯を出湯さ
せるようにし、追い焚き単独運転停止後に、より給湯設
定温度に近い湯を出湯できる構成にした。Therefore, in this embodiment, the bypass valve closing time tbc is variably set in such a manner that the bypass valve closing time tbc is shortened as the hot water supply set temperature Ts set in the hot water supply temperature setting means 42 increases. The hot water is supplied at an earlier timing, and conversely, the hot water supply set temperature T
As the s becomes lower, the bypass valve closing time tbc is variably set to be longer, the closing timing of the bypass valve 17 is delayed after the additional heating alone operation is stopped, so that a lower amount of hot water is discharged, and the additional heating alone operation is stopped. Later, hot water closer to the hot water supply set temperature could be discharged.
【００５２】データ格納部４８には図２の（ａ）や
（ｂ）に示すような閉弁時間データが格納されている。
この閉弁時間データは、給湯設定温度Ｔsに基づきバイ
パス弁閉弁時間ｔbcを可変設定するためのデータであ
り、追い焚き単独運転停止後にバイパス弁１７を閉弁さ
せてアンダーシュートの湯が出湯するのを防止でき、か
つ、バイパス弁１７を閉弁させても高温出湯の虞がない
バイパス弁１７の閉弁タイミングを、給湯設定温度毎
に、実験や演算等によって時間により求め、給湯設定温
度に対応させてバイパス弁閉弁時間ｔbcが与えられてい
る。図２の（ａ）や（ｂ）に示すように、給湯設定温度
が高くなるに従ってバイパス弁閉弁時間ｔbcは連続的に
又は段階的に短くなっている。The data storage section 48 stores valve closing time data as shown in FIGS. 2A and 2B.
This valve closing time data is data for variably setting the bypass valve closing time tbc based on the hot water supply set temperature Ts. After the reheating alone operation is stopped, the bypass valve 17 is closed to discharge undershoot hot water. The closing timing of the bypass valve 17, which can prevent the occurrence of high temperature hot water even when the bypass valve 17 is closed, is obtained by time through experiments, calculations, etc., for each set hot water supply temperature. Correspondingly, a bypass valve closing time tbc is given. As shown in FIGS. 2A and 2B, as the hot water supply set temperature increases, the bypass valve closing time tbc decreases continuously or stepwise.
【００５３】閉弁時間可変設定部５２は、予め定められ
ているタイミング（例えば、予め定めたサンプリング時
間間隔、又は、追い焚き単独運転監視部４６の監視情報
に基づいて追い焚き単独運転が開始されたと検知したタ
イミング）で、リモコン４１の給湯温度設定手段４２に
設定されている給湯設定温度Ｔsを取り込み、この取り
込んだ給湯設定温度Ｔsを上記閉弁時間データに照らし
合わせて上記給湯設定温度Ｔsに対応する時間を求め、
この求めた時間をバイパス弁閉弁時間ｔbcとして設定し
てデータ格納部４８のバイパス弁閉弁時間ｔbcに上書き
しバイパス弁閉弁時間ｔbcの自動更新を行う。The variable valve closing time setting section 52 starts a reheating alone operation based on a predetermined timing (for example, a predetermined sampling time interval or monitoring information of the reheating independent operation monitoring section 46). At the timing of detecting that the hot water supply temperature setting means 42 of the remote controller 41 has been set, the hot water supply set temperature Ts is compared with the valve closing time data to obtain the hot water supply set temperature Ts. Find the corresponding time,
The obtained time is set as the bypass valve closing time tbc and is overwritten on the bypass valve closing time tbc in the data storage unit 48 to automatically update the bypass valve closing time tbc.
【００５４】バイパス弁制御部４７は、前記第１の実施
形態例と同様に、追い焚き単独運転監視部４６により監
視された追い焚き単独運転の停止後に、データ格納部４
８のバイパス弁閉弁時間ｔbcに基づきバイパス弁１７の
閉弁タイミングを決定してバイパス弁１７を閉弁する。Similarly to the first embodiment, the bypass valve control unit 47 stops the reheating alone operation monitored by the reheating independent operation monitoring unit 46 and then stores the data in the data storage unit 4.
The closing timing of the bypass valve 17 is determined based on the bypass valve closing time tbc of No. 8, and the bypass valve 17 is closed.
【００５５】この実施形態例によれば、閉弁時間可変設
定部５２を設け、この閉弁時間可変設定部５２によって
バイパス弁閉弁時間ｔbcを給湯設定温度に応じて可変設
定するので、給湯設定温度に合わせて追い焚き単独運転
停止後のバイパス弁１７の閉弁タイミングを決定するこ
とができ、追い焚き単独運転停止後の給湯時に、より給
湯設定温度に近い湯を出湯させることができる。なお、
給湯の利用者が設定する給湯設定温度の範囲はほぼ定ま
り、その給湯設定温度の範囲は狭く、その給湯設定温度
の範囲内の給湯設定温度に対応するバイパス弁閉弁時間
ｔbcはほぼ等しいので、そのバイパス弁閉弁時間ｔbcに
バイパス弁閉弁時間ｔbcを固定し、前記第１の実施形態
例と同様に、追い焚き単独運転停止後にその固定のバイ
パス弁閉弁時間ｔbcに基づいてバイパス弁１７を閉弁さ
せることによって、追い焚き単独運転に起因した高温出
湯と、ポストポンプに起因したアンダーシュート出湯と
をほぼ回避することはできる。According to this embodiment, the variable valve closing time setting section 52 is provided, and the variable valve closing time setting section 52 variably sets the bypass valve closing time tbc according to the set hot water supply temperature. The closing timing of the bypass valve 17 after the stoppage of the independent heating operation can be determined in accordance with the temperature, and hot water closer to the hot water supply set temperature can be discharged at the time of hot water supply after the stoppage of the independent heating operation. In addition,
Since the range of the hot water supply set temperature set by the user of the hot water supply is substantially determined, the range of the hot water supply set temperature is narrow, and the bypass valve closing time tbc corresponding to the hot water supply set temperature within the range of the hot water supply set temperature is substantially equal. The bypass valve closing time tbc is fixed to the bypass valve closing time tbc, and, similarly to the first embodiment, after the reheating alone operation is stopped, the bypass valve 17 is determined based on the fixed bypass valve closing time tbc. By closing the valve, it is possible to substantially avoid high-temperature hot water supply caused by the reheating alone operation and undershoot hot water supply caused by the post pump.
【００５６】以下に、第３の実施形態例を説明する。こ
の実施形態例が前記第２の実施形態例と異なる特徴的な
ことは、閉弁時間可変設定部５２が給湯設定温度Ｔsに
基づいてバイパス弁閉弁時間ｔbcを可変設定するのでは
なく、追い焚き単独運転により給湯熱交換器３に与えら
れる保有熱量に基づいてバイパス弁閉弁時間ｔbc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
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. This embodiment is different from the second embodiment in that the valve closing time variable setting section 52 does not variably set the bypass valve closing time tbc based on the hot water supply set temperature Ts, but instead sets the valve closing time tbc variably. The configuration is such that the bypass valve closing time tbc is variably set based on the amount of retained heat given to the hot water supply heat exchanger 3 by the single boil operation. The other configuration is the same as that of the second embodiment, and the description of the common parts will not be repeated.
【００５７】この実施形態例では、図３に示すように、
閉弁時間可変設定部５２は時間計測部５４と保有熱量検
出部５５と時間設定部５６を有して構成されている。な
お、図３では図１に示す燃焼制御部４５と追い焚き単独
運転監視部４６とバイパス弁制御部４７と時間計測部５
０とバイパス弁開弁部５１の図示が省略されている。In this embodiment, as shown in FIG.
The valve closing time variable setting section 52 includes a time measuring section 54, a retained heat quantity detecting section 55, and a time setting section 56. In FIG. 3, the combustion control unit 45, the reheating independent operation monitoring unit 46, the bypass valve control unit 47, and the time measurement unit 5 shown in FIG.
0 and the illustration of the bypass valve opening portion 51 are omitted.
【００５８】時間計測部５４は追い焚き単独運転監視部
４６の監視情報を取り込んで、この情報に基づき追い焚
き単独運転が開始されたと検知したときから追い焚き単
独運転が終了するまでの追い焚き単独運転時間を計測す
る構成を有している。The time measuring section 54 fetches the monitoring information of the reheating independent operation monitoring section 46 and, based on the information, detects that the reheating independent operation has started and continues the reheating only operation from the time when the reheating independent operation ends. It has a configuration for measuring the operation time.
【００５９】データ格納部４８には図４に示すような保
有熱量データが予め格納されている。この保有熱量デー
タは、追い焚き単独運転によるバーナー２の燃焼により
給湯熱交換器３に与えられる給湯熱交換器３の保有熱量
を求めるためのデータであり、図４に示すように、燃焼
熱量毎に追い焚き単独運転時間に対応させて給湯熱交換
器３の保有熱量が与えられているもので、予め実験や演
算等により求められてデータ格納部４８に格納されてい
る。上記保有熱量データの各燃焼熱量のデータとも追い
焚き単独運転の開始時には時間の経過と共に給湯熱交換
器３の保有熱量は増加し、その後、給湯熱交換器３の保
有熱量は飽和状態になる。The data storage section 48 stores stored heat quantity data as shown in FIG. The retained calorie data is data for calculating the retained calorie of the hot water supply heat exchanger 3 which is given to the hot water supply heat exchanger 3 by the combustion of the burner 2 in the reheating alone operation, and as shown in FIG. The amount of heat possessed by the hot water supply heat exchanger 3 is given in correspondence with the independent operation time of reheating, and is obtained in advance by experiments, calculations, and the like, and stored in the data storage unit 48. At the start of the reheating alone operation, the stored heat amount of the hot water supply heat exchanger 3 increases with the lapse of time at the start of the reheating alone operation, and the stored heat amount of the hot water supply heat exchanger 3 becomes saturated.
【００６０】保有熱量検出部５５は追い焚き単独運転監
視部４６の監視情報を取り込み、この情報に基づき追い
焚き単独運転が行われていると検知すると、燃焼制御部
４５からバーナー２の燃焼熱量情報を追い焚き単独運転
の燃焼熱量情報として取り込んで、この取り込んだ燃焼
熱量に対応するデータを前記データ格納部４８の保有熱
量データから選択して読み出す。The retained calorie detecting unit 55 captures the monitoring information of the reheating independent operation monitoring unit 46, and when it detects that the reheating alone operation is being performed based on this information, the combustion control unit 45 outputs the combustion heat amount information of the burner 2 from the combustion control unit 45. Is read as combustion heat amount information of the reheating operation alone, and data corresponding to the taken combustion heat amount is selected and read from the stored heat amount data in the data storage unit 48.
【００６１】そして、保有熱量検出部５５は、追い焚き
単独運転監視部４６の監視情報に基づき追い焚き単独運
転が終了したと検知したときに、前記時間計測部５４が
計測した追い焚き単独運転時間を読み出し、この追い焚
き単独運転時間を前記読み出した保有熱量データに照ら
し合わせて追い焚き単独運転による給湯熱交換器３の保
有熱量を求め、この保有熱量に対応するデータ信号を時
間設定部５６に出力する。When the retained calorie detection unit 55 detects that the reheating alone operation is completed based on the monitoring information of the reheating independent operation monitoring unit 46, the reheating independent operation time measured by the time measurement unit 54 is used. Is read, and the reheating alone operation time is compared with the read stored heat amount data to determine the retained heat amount of the hot water supply heat exchanger 3 by the reheating alone operation, and a data signal corresponding to the retained heat amount is sent to the time setting unit 56. Output.
【００６２】データ格納部４８には図５に示すような閉
弁時間データが予め格納されている。この閉弁時間デー
タは保有熱量に応じてバイパス弁閉弁時間ｔbcを可変設
定するためのデータであり、予め実験や演算等により求
められる。この閉弁時間データは保有熱量が多くなるに
従ってバイパス弁閉弁時間ｔbcが連続的に又は段階的に
長くなるように定められている。The data storage section 48 stores valve closing time data as shown in FIG. 5 in advance. This valve closing time data is data for variably setting the bypass valve closing time tbc according to the retained heat amount, and is obtained in advance by experiments, calculations, and the like. The valve closing time data is set such that the bypass valve closing time tbc is increased continuously or stepwise as the retained heat amount increases.
【００６３】それというのは、給湯熱交換器３の保有熱
量が多くなるに従って追い焚き単独運転停止後のポスト
ポンプにより給湯熱交換器３の湯が冷却されるのに要す
る時間が多く必要になり、反対に、給湯熱交換器３の保
有熱量が少なくなるに従って追い焚き単独運転停止後の
ポストポンプにより給湯熱交換器３の湯が冷却されるの
に要する時間が短くなるので、追い焚き単独運転停止後
の給湯時に、より確実に高温出湯とアンダーシュート出
湯とを共に回避して給湯設定温度に近い湯を出湯させる
ためには、保有熱量に応じてバイパス弁閉弁時間ｔbcを
可変設定し、このバイパス弁閉弁時間ｔbcに基づいてバ
イパス弁１７の閉弁タイミングを決定する必要があるか
らである。That is, as the amount of heat retained in the hot water supply heat exchanger 3 increases, the time required for the hot water in the hot water supply heat exchanger 3 to be cooled by the post pump after the independent operation of the reheating becomes longer. Conversely, as the amount of heat retained in the hot water supply heat exchanger 3 decreases, the time required for the hot water in the hot water supply heat exchanger 3 to be cooled by the post pump after the independent operation of the reheating only becomes shorter. At the time of hot water supply after the stop, in order to more reliably avoid both high-temperature hot water and undershoot hot water and discharge hot water close to the hot water supply set temperature, the bypass valve closing time tbc is variably set according to the retained heat quantity, This is because it is necessary to determine the closing timing of the bypass valve 17 based on the bypass valve closing time tbc.
【００６４】時間設定部５６は追い焚き単独運転監視部
４６の監視情報を取り込んで、この監視情報に基づき追
い焚き単独運転が終了したと検知したときに、データ格
納部４８から上記閉弁時間データを読み出し、前記保有
熱量検出部５５から検出出力された保有熱量を上記閉弁
時間データに照らし合わせて給湯熱交換器３の保有熱量
に対応する時間を求めてバイパス弁閉弁時間ｔbcとして
設定し、データ格納部４８のバイパス弁閉弁時間ｔbcに
上書きしバイパス弁閉弁時間ｔbcの自動更新を行う。バ
イパス弁制御部４７は、前記各実施形態例に述べたよう
に、追い焚き単独運転の停止後に、データ格納部４８の
バイパス弁閉弁時間ｔbcに基づいてバイパス弁１７の閉
弁タイミングを決定しバイパス弁１７の閉弁制御を行
う。The time setting section 56 fetches the monitoring information of the reheating independent operation monitoring section 46 and, when detecting that the reheating independent operation has ended based on the monitoring information, reads the valve closing time data from the data storage section 48. Is read, and the retained heat amount detected and output from the retained heat amount detection unit 55 is compared with the valve closing time data to obtain a time corresponding to the retained heat amount of the hot water supply heat exchanger 3 and set as a bypass valve closing time tbc. Then, the bypass valve closing time tbc in the data storage unit 48 is overwritten and the bypass valve closing time tbc is automatically updated. As described in the above embodiments, the bypass valve control unit 47 determines the closing timing of the bypass valve 17 based on the bypass valve closing time tbc of the data storage unit 48 after the stop of the additional heating alone operation. The closing control of the bypass valve 17 is performed.
【００６５】この実施形態例によれば、閉弁時間可変設
定部５２を設けて、この閉弁時間可変設定部５２によ
り、追い焚き単独運転により給湯熱交換器３に与えられ
た保有熱量に応じてバイパス弁閉弁時間ｔbcを可変設定
し、このバイパス弁閉弁時間ｔbcに基づいて追い焚き単
独運転停止後にバイパス弁１７の閉弁タイミングを決定
しバイパス弁１７を閉弁させる構成にしたので、追い焚
き単独運転停止後に、より確実に追い焚き単独運転に起
因した高温出湯や、ポストポンプに起因したアンダーシ
ュートの湯の出湯を回避することができ、追い焚き単独
運転停止後の給湯時にほぼ給湯設定温度の湯を出湯させ
ることが可能となる。According to this embodiment, the variable valve closing time setting section 52 is provided, and the variable valve closing time setting section 52 controls the amount of retained heat given to the hot water supply heat exchanger 3 by the reheating alone operation. By setting the bypass valve closing time tbc variably, the closing timing of the bypass valve 17 is determined and the bypass valve 17 is closed based on the bypass valve closing time tbc after the reheating alone operation is stopped, so that the bypass valve 17 is closed. After stopping reheating alone operation, hot water supply caused by reheating alone operation and undershoot hot water caused by post pump can be avoided more reliably. Hot water at the temperature can be discharged.
【００６６】なお、上記実施形態例では、時間計測部５
０とは別個に時間計測部５４が設けられたが、時間計測
部５０が時間計測部５４の機能を兼用する構成にしても
よい。この場合、時間計測部５４が省略できるので、閉
弁時間可変設定部５２の構成を簡略化することができ
る。In the above embodiment, the time measuring unit 5
Although the time measurement unit 54 is provided separately from 0, the configuration may be such that the time measurement unit 50 also functions as the time measurement unit 54. In this case, since the time measuring unit 54 can be omitted, the configuration of the valve closing time variable setting unit 52 can be simplified.
【００６７】以下に、第４の実施形態例を説明する。こ
の第４の実施形態例において特徴的なことは、ポストポ
ンプ中に追い焚き循環通路２４を循環する循環湯水の温
度に基づいて閉弁時間可変設定部５２がバイパス弁閉弁
時間ｔbc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、その重複説
明は省略する。Hereinafter, a fourth embodiment will be described. What is characteristic in the fourth embodiment is that the valve closing time variable setting section 52 variably sets the bypass valve closing time tbc based on the temperature of the circulating hot and cold water circulating in the post-pumping recirculation passage 24 during the post pump. That is, the configuration is as follows. The other configurations are the same as those of the above-described embodiments, and the description thereof will not be repeated.
【００６８】ところで、追い焚き単独運転停止後のポス
トポンプ中に追い焚き循環通路２４を循環する循環湯水
の温度が高くなるに従って、つまり、追い焚き熱交換器
４の通水温が高くなるに従って、追い焚き熱交換器４の
通水が給湯熱交換器３から奪う熱量が少なくなり、給湯
熱交換器３の湯温の低下傾向が緩やかになる。反対に、
追い焚き熱交換器４の通水温が低くなるに従って追い焚
き熱交換器４の通水が給湯熱交換器３から奪う熱量が多
くなって給湯熱交換器３の湯温の低下傾向が急になる。By the way, as the temperature of the circulating hot and cold water circulating through the additional heating circulation passage 24 during the post-pump after the independent operation of the additional heating is increased, that is, as the water passing temperature of the additional heat exchanger 4 increases, the additional The amount of heat taken from the hot water supply heat exchanger 3 by the flow of water in the heating heat exchanger 4 is reduced, and the tendency of the hot water temperature of the hot water supply heat exchanger 3 to decrease is moderated. Conversely,
As the water temperature of the reheating heat exchanger 4 decreases, the amount of heat taken by the reheating heat exchanger 4 from the hot water supply heat exchanger 3 increases, and the tendency of the hot water temperature of the hot water supply heat exchanger 3 to decrease rapidly. .
【００６９】このため、より確実に追い焚き単独運転に
起因した高温出湯と、ポストポンプに起因したアンダー
シュート出湯とを共に回避するためには、追い焚き単独
運転停止後に追い焚き熱交換器４の通水温に応じてバイ
パス弁閉弁時間ｔbcを可変設定し、この設定したバイパ
ス弁閉弁時間ｔbcに基づいて追い焚き単独運転停止後の
バイパス弁１７の閉弁タイミングを決定する必要があ
る。Therefore, in order to more reliably avoid both the high-temperature hot water caused by the reheating alone operation and the undershoot hot water caused by the post pump, the reheating heat exchanger 4 after the reheating alone operation is stopped. It is necessary to variably set the bypass valve closing time tbc according to the passing water temperature, and to determine the closing timing of the bypass valve 17 after the stoppage of the reheating alone operation based on the set bypass valve closing time tbc.
【００７０】そこで、この実施形態例では、追い焚き単
独運転停止後に追い焚き循環通路２４（追い焚き熱交換
器４）の通水温に応じてバイパス弁閉弁時間ｔbcを可変
設定し、この設定したバイパス弁閉弁時間ｔbcに基づい
て追い焚き単独運転停止後のバイパス弁１７の閉弁タイ
ミングを決定し、追い焚き単独運転停止後にバイパス弁
１７を閉弁させるする構成にした。Therefore, in this embodiment, the bypass valve closing time tbc is variably set in accordance with the temperature of water flowing through the reheating circulation passage 24 (reheating heat exchanger 4) after the reheating independent operation is stopped, and this setting is performed. The closing timing of the bypass valve 17 after the reheating alone operation is stopped is determined based on the bypass valve closing time tbc, and the bypass valve 17 is closed after the reheating alone operation is stopped.
【００７１】閉弁時間可変設定部５２は、図１の点線に
示すように、追い焚き単独運転監視部４６の監視情報を
取り込み、この監視情報に基づき追い焚き単独運転が終
了したと検知したときに、循環通路温度検出手段として
の風呂温度センサ３７のセンサ出力に基づいて追い焚き
循環通路２４を循環する循環湯水の温度を検出し、この
検出温度をデータ格納部４８に予め格納されている次に
示す閉弁時間データに照らし合わせる。As shown by the dotted line in FIG. 1, the valve closing time variable setting section 52 fetches the monitoring information of the reheating independent operation monitoring section 46, and detects that the reheating independent operation has ended based on the monitoring information. Next, the temperature of the circulating hot and cold water circulating through the reheating circulating passage 24 is detected based on the sensor output of the bath temperature sensor 37 as the circulating passage temperature detecting means, and this detected temperature is stored in the data storage unit 48 in advance. In comparison with the valve closing time data shown in.
【００７２】上記閉弁時間データは、ポストポンプ中の
追い焚き循環通路２４の循環湯水温に基づいて閉弁時間
を設定するためのデータであり、追い焚き単独運転に起
因した高温出湯と、ポストポンプに起因したアンダーシ
ュート出湯とを共に回避することができるバイパス弁１
７の閉弁タイミングを、追い焚き循環通路２４の循環湯
水温毎に、実験や演算等によって時間により求め、その
時間が追い焚き循環通路２４の循環湯水温度に対応させ
て与えられている。ここでは、追い焚き循環通路２４の
循環湯水温が高くなるに従ってバイパス弁閉弁時間ｔbc
が長くなるようにバイパス弁閉弁時間ｔbcが与えられて
いる。The above valve closing time data is data for setting the valve closing time based on the temperature of the circulating hot water in the additional heating circulation passage 24 in the post pump. Bypass valve 1 that can avoid both undershoot hot water caused by the pump
The valve closing timing of 7 is obtained by time for each circulating hot water temperature of the additional heating circulation passage 24 through experiments, calculations, and the like, and the time is given in correspondence with the circulating hot water temperature of the additional heating circulation passage 24. Here, as the temperature of the circulating water in the additional heating circulation passage 24 increases, the bypass valve closing time tbc
Is set to be longer so that the bypass valve closing time tbc is longer.
【００７３】閉弁時間可変設定部５２は、前記の如く、
風呂温度センサ３７により検出された追い焚き循環通路
２４の循環湯水温を閉弁時間データに照らし合わせ、上
記循環湯水温に対応した時間を上記閉弁時間データから
求め、この求めた時間をバイパス弁閉弁時間ｔbcとして
設定しデータ格納部４８のバイパス弁閉弁時間ｔbcに上
書きしバイパス弁閉弁時間ｔbcの自動更新を行う。As described above, the valve closing time variable setting section 52
The temperature of the circulating hot water in the additional heating circulation passage 24 detected by the bath temperature sensor 37 is compared with the valve closing time data, and a time corresponding to the circulating hot water temperature is obtained from the valve closing time data. It is set as the valve closing time tbc and overwrites the bypass valve closing time tbc in the data storage unit 48 to automatically update the bypass valve closing time tbc.
【００７４】この実施形態例によれば、閉弁時間可変設
定部５２を設け、この閉弁時間可変設定部５２により、
追い焚き単独運転停止後の追い焚き循環通路２４の循環
湯水温に応じてバイパス弁閉弁時間ｔbcを可変設定し、
このバイパス弁閉弁時間ｔbcに基づき追い焚き単独運転
停止後のバイパス弁１７の閉弁タイミングを決定してバ
イパス弁１７の閉弁制御を行う構成にしたので、給湯熱
交換器３の湯温の低下傾向に影響を及ぼす追い焚き循環
通路２４の循環湯温に基づいて、追い焚き単独運転停止
後のバイパス弁１７の閉弁タイミングを決定することが
でき、より確実に追い焚き単独運転に起因した高温出湯
と、ポストポンプに起因したアンダーシュート出湯とを
共に回避することができる。According to this embodiment, the variable valve closing time setting section 52 is provided, and the variable valve closing time setting section 52
The bypass valve closing time tbc is variably set in accordance with the circulating hot water temperature of the reheating recirculation passage 24 after the reheating alone operation is stopped,
Based on the bypass valve closing time tbc, the closing timing of the bypass valve 17 after the reheating independent operation is stopped is determined to perform the closing control of the bypass valve 17, so that the hot water temperature of the hot water supply heat exchanger 3 is controlled. It is possible to determine the closing timing of the bypass valve 17 after the reheating alone operation is stopped, based on the temperature of the circulating hot water in the reheating recirculation passage 24 which affects the decreasing tendency, and it is possible to more reliably cause the reheating alone operation. Both hot tapping and undershoot tapping caused by the post pump can be avoided.
【００７５】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、追い焚き単独運
転の停止後に時間によってバイパス弁１７の閉弁タイミ
ングを決定するのではなく、給湯熱交換器３の湯温を検
出する給湯熱交換器湯水温度検出手段である図８の鎖線
に示す給湯熱交換器湯温センサ３３を設け、この給湯熱
交換器湯温センサ３３により検出される給湯熱交換器３
の湯温に基づき、追い焚き単独運転停止後のバイパス弁
１７の閉弁タイミングを決定する構成にしたことであ
る。それ以外の構成は前記第１の実施形態例の構成と同
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 closing timing of the bypass valve 17 is not determined based on the time after the stoppage of the reheating alone operation, but the hot water supply heat exchanger for detecting the hot water temperature of the hot water supply heat exchanger 3 is used. A hot water supply heat exchanger hot water temperature sensor 33 indicated by a dashed line in FIG. 8 as a temperature detecting means is provided.
Based on the hot water temperature, the closing timing of the bypass valve 17 after the stop of the reheating alone operation is determined. The other configuration is the same as the configuration of the first embodiment, and the description thereof will not be repeated.
【００７６】この実施形態例では、前記の如く、給湯熱
交換器３の湯温を検出する給湯熱交換器湯温センサ３３
を給湯熱交換器３（例えば、図８の鎖線に示すように、
給湯熱交換器３のＵ字形状の管路部分（給湯Ｕバン
ド））に設ける。In this embodiment, as described above, the hot water supply heat exchanger hot water temperature sensor 33 for detecting the hot water temperature of the hot water supply heat exchanger 3 is used.
To the hot water supply heat exchanger 3 (for example, as indicated by a chain line in FIG. 8,
The hot water supply heat exchanger 3 is provided in a U-shaped pipe portion (hot water supply U band).
【００７７】データ格納部４８には予めバイパス弁閉弁
温度Ｔclが格納されている。上記バイパス弁閉弁温度Ｔ
clは、バイパス弁１７を閉弁することによりアンダーシ
ュートの湯の出湯を回避することができ、しかも、バイ
パス弁１７を閉弁させても高温出湯を回避することがで
きる給湯熱交換器３の湯温であり、予め実験や演算等に
より求められてデータ格納部４８に格納されている。The data storage section 48 stores the bypass valve closing temperature Tcl in advance. The above-mentioned bypass valve closing temperature T
cl indicates that the hot water of the hot water supply heat exchanger 3 is capable of avoiding hot water of undershoot by closing the bypass valve 17 and avoiding high-temperature hot water even when the bypass valve 17 is closed. The temperature is obtained in advance by experiments, calculations, or the like, and stored in the data storage unit 48.
【００７８】バイパス弁制御部４７は追い焚き単独運転
監視部４６から取り込んだ監視情報に基づき、追い焚き
単独運転が終了したと検知したときに、上記データ格納
部４８のバイパス弁閉弁温度Ｔclを読み出すと共に、給
湯熱交換器湯温センサ３３のセンサ出力の取り込みを開
始する。そして、バイパス弁制御部４７は、時々刻々と
取り込まれる給湯熱交換器湯温センサ３３のセンサ出力
に基づいて検出される給湯熱交換器３の湯温を上記バイ
パス弁閉弁温度Ｔclに比較する。When the bypass valve control unit 47 detects that the reheating alone operation has been completed based on the monitoring information taken from the reheating independent operation monitoring unit 46, the bypass valve control unit 47 determines the bypass valve closing temperature Tcl of the data storage unit 48. At the same time, the reading of the sensor output of the hot water supply heat exchanger hot water temperature sensor 33 is started. Then, the bypass valve control unit 47 compares the hot water temperature of the hot water supply heat exchanger 3 detected based on the sensor output of the hot water supply heat exchanger hot water temperature sensor 33 that is taken every moment with the bypass valve closing temperature Tcl. .
【００７９】給湯熱交換器３の湯温は時間の経過と共に
低下していき、給湯熱交換器３の湯温が上記バイパス弁
閉弁温度Ｔclに低下したとバイパス弁制御部４７が判断
したときに、追い焚き単独運転に起因した高温出湯と、
ポストポンプに起因したアンダーシュート出湯とを共に
回避できるタイミングであると判断して、バイパス弁制
御部４７はバイパス弁１７を閉弁させる。When the bypass valve control unit 47 determines that the hot water temperature of the hot water supply heat exchanger 3 has decreased to the above-described bypass valve closing temperature Tcl, the hot water temperature of the hot water supply heat exchanger 3 has decreased. In addition, high temperature hot water caused by reheating alone operation,
The bypass valve control unit 47 closes the bypass valve 17 by judging that it is time to avoid both undershoot hot water caused by the post pump.
【００８０】以下に、第６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、バイパス弁１７
を、開弁量によってバイパス通路１６の通水流量を連続
的に又は段階的に可変することができる流量制御弁で構
成し、追い焚き単独運転停止後にバイパス弁１７の開弁
量を連続的に又は段階的に絞りながら閉弁させる構成に
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. What is characteristic in this embodiment is the bypass valve 17.
Is constituted by a flow control valve capable of continuously or stepwise changing the flow rate of the water flowing through the bypass passage 16 by the valve opening amount. Alternatively, the valve is closed while being throttled stepwise. The other configuration is the same as that of the first embodiment, and the description of the common parts will not be repeated.
【００８１】上記の如く、バイパス弁１７は開弁量によ
ってバイパス通路１６の通水の流量を連続的に又は段階
的に可変することができる流量制御弁（水調弁）により
構成されている。As described above, the bypass valve 17 is constituted by a flow control valve (water regulating valve) capable of continuously or stepwise varying the flow rate of water flowing through the bypass passage 16 according to the opening amount.
【００８２】データ格納部４８には図６の（ａ）や
（ｂ）に示すような開弁量データが格納されている。上
記開弁量データは追い焚き単独運転が停止してからの時
間の経過に従ってバイパス弁１７の開弁量を連続的に又
は段階的に絞り可変していきバイパス弁１７を閉弁させ
るためのデータであり、追い焚き単独運転停止後のポス
トポンプによる給湯熱交換器３の湯温の低下を考慮し
て、追い焚き単独運転に起因した高温出湯と、アンダー
シュートの湯の出湯とを共に回避することができるバイ
パス弁１７の開弁量を、追い焚き単独運転が停止してか
らの経過時間毎に、実験や演算等によって求め、上記追
い焚き単独運転停止後の経過時間に対応させてバイパス
弁１７の開弁量が与えられている。The data storage section 48 stores valve opening amount data as shown in FIGS. 6A and 6B. The above opening amount data is data for closing the bypass valve 17 by continuously or stepwise reducing the opening amount of the bypass valve 17 as time elapses after the reheating alone operation is stopped. In consideration of the decrease in the hot water temperature of the hot water supply heat exchanger 3 by the post pump after the reheating alone operation is stopped, avoiding both the high-temperature hot water caused by the reheating alone operation and the undershoot hot water. The amount of opening of the bypass valve 17 that can be performed is determined by an experiment, a calculation, or the like for each elapsed time after the stop-only operation is stopped, and is associated with the elapsed time after the stop-only operation is stopped. Is provided.
【００８３】バイパス弁制御部４７は、追い焚き単独運
転監視部４６から取り込んだ監視情報に基づき追い焚き
単独運転中である、又は、追い焚き単独運転が停止した
と検知したときに、データ格納部４８から前記開弁量デ
ータを読み出す。また、バイパス弁制御部４７は、追い
焚き単独運転監視部４６の監視情報に基づき追い焚き単
独運転が停止したと検知したときに、時間計測部５０に
追い焚き単独運転が停止してからの経過時間の計測を開
始させる。When the bypass valve control unit 47 detects that reheating alone is in operation or stops reheating alone based on the monitoring information taken in from the reheating independent operation monitoring unit 46, the data storage unit 48, the valve opening amount data is read. In addition, when the bypass valve control unit 47 detects that the reheating alone operation has been stopped based on the monitoring information of the reheating independent operation monitoring unit 46, the time measurement unit 50 has elapsed since the reheating independent operation was stopped. Start time measurement.
【００８４】そして、バイパス弁制御部４７は、時々刻
々と時間計測部５０の計測時間を取り込み、この時間計
測部５０の計測時間と前記開弁量データに基づき、バイ
パス弁１７の開弁量を連続的に又は段階的に絞っていき
バイパス弁１７を閉弁させる。なお、バイパス弁１７の
開弁量の可変制御の手法には様々な手法が提案されてお
り、この実施形態例では、それら提案の手法のうちのい
ずれの手法を用いてバイパス弁１７の開弁量を可変制御
してもよく、ここでは、そのバイパス弁１７の開弁量制
御手法の説明は省略する。Then, the bypass valve control unit 47 takes in the measurement time of the time measurement unit 50 every moment, and determines the opening amount of the bypass valve 17 based on the measurement time of the time measurement unit 50 and the valve opening amount data. The bypass valve 17 is closed continuously or in a stepwise manner. Various techniques have been proposed for the variable control of the opening amount of the bypass valve 17. In this embodiment, the opening of the bypass valve 17 is performed by using any of the proposed techniques. The amount may be variably controlled, and the description of the method for controlling the opening amount of the bypass valve 17 is omitted here.
【００８５】この実施形態例によれば、流量制御弁によ
ってバイパス弁１７を構成し、追い焚き単独運転の停止
後に、バイパス弁１７の開弁量を連続的に又は段階的に
絞っていきバイパス弁１７を閉弁させる構成にしたの
で、追い焚き単独運転停止後に給湯熱交換器３の湯温の
低下に従って給湯熱交換器３の湯に加えるバイパス通路
１６の水量をバイパス弁１７の開弁量によって可変する
ことができ、追い焚き単独運転停止後の給湯時に、追い
焚き単独運転に起因した高温出湯と、ポストポンプに起
因したアンダーシュートの湯の出湯とを共に回避するこ
とができ、ほぼ給湯設定温度の湯を出湯させることが可
能であり、湯の利用者は、追い焚き単独運転停止後の給
湯出湯時に、快適に湯を使用することができる。According to this embodiment, the bypass valve 17 is constituted by the flow control valve, and after the reheating alone operation is stopped, the opening amount of the bypass valve 17 is continuously or stepwise reduced. Since the configuration is such that the valve 17 is closed, the amount of water in the bypass passage 16 to be added to the hot water of the hot water supply heat exchanger 3 according to the decrease in the hot water temperature of the hot water supply heat exchanger 3 after the stop-only operation is stopped depends on the opening amount of the bypass valve 17. It can be changed, and at the time of hot water supply after reheating alone operation stop, it is possible to avoid both high-temperature hot water caused by reheating alone operation and hot water of undershoot caused by post pump, and almost hot water setting temperature Hot water can be supplied, and the user of the hot water can use the hot water comfortably at the time of hot water supply after the reheating alone operation is stopped.
【００８６】以下に、第７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、追い焚き単独運
転停止後に、流量制御弁により構成されたバイパス弁１
７の開弁量を、給湯熱交換器３の湯温を検出する給湯熱
交換器湯温センサ３３のセンサ出力に基づいて、連続的
に又は段階的に絞っていきバイパス弁１７を閉弁させる
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、その重複説明は省略する。Hereinafter, a seventh embodiment will be described. What is characteristic in this embodiment is that after the stoppage of the independent operation of the reheating, the bypass valve 1 constituted by the flow control valve is operated.
The opening amount of 7 is continuously or stepwise reduced based on the sensor output of the hot water supply heat exchanger hot water temperature sensor 33 for detecting the hot water temperature of the hot water supply heat exchanger 3, and the bypass valve 17 is closed. That is, it is a configuration. The other configurations are the same as those of the above-described embodiments, and the description thereof will not be repeated.
【００８７】ところで、追い焚き単独運転停止後に、高
温出湯とアンダーシュート出湯とを共に回避するため
に、給湯熱交換器３の湯に加えるバイパス通路１６の水
の最適量は、給湯熱交換器３の湯温が低くなるに従って
少なくなっていく。By the way, in order to avoid both high-temperature hot water supply and undershoot hot water supply after the reheating alone operation is stopped, the optimum amount of water in the bypass passage 16 to be added to the hot water in the hot water supply heat exchanger 3 is The water temperature decreases as the temperature decreases.
【００８８】このことから、この実施形態例では、前記
第２の実施形態例に示した給湯熱交換器湯温センサ３３
を給湯熱交換器３に設け、また、前記第６の実施形態例
と同様にバイパス弁１７を流量制御弁により構成し、追
い焚き単独運転停止後に、給湯熱交換器湯温センサ３３
に基づいて検出される給湯熱交換器３の湯温に応じてバ
イパス弁１７の開弁量を連続的に又は段階的に絞って、
給湯熱交換器３の湯に加えるバイパス通路１６の水量を
連続的に又は段階的に減少させていき、追い焚き単独運
転停止後にほぼ給湯設定温度の湯を出湯させることが可
能な構成にしたことである。Therefore, in this embodiment, the hot water supply heat exchanger hot water temperature sensor 33 shown in the second embodiment is used.
Is provided in the hot water supply heat exchanger 3, and the bypass valve 17 is constituted by a flow control valve in the same manner as in the sixth embodiment.
The opening amount of the bypass valve 17 is continuously or stepwise reduced according to the hot water temperature of the hot water supply heat exchanger 3 detected based on
The amount of water in the bypass passage 16 to be added to the hot water of the hot water supply heat exchanger 3 is reduced continuously or stepwise so that the hot water at the hot water supply set temperature can be discharged after the reheating alone operation is stopped. It is.
【００８９】データ格納部４８には図７の（ａ）や
（ｂ）に示すような開弁量データが格納されている。こ
の開弁量データは、追い焚き単独運転の停止後に、給湯
熱交換器３の湯温に基づいてバイパス弁１７の開弁量を
連続的に又は段階的に絞ってバイパス弁１７を閉弁させ
るためのデータであり、給湯熱交換器３の湯が低くなる
に従ってバイパス弁１７の開弁量を減少させ予め定めた
温度Ｔaで閉弁するように給湯熱交換器３の湯温に対応
させてバイパス弁１７の開弁量が与えられている。The data storage section 48 stores valve opening amount data as shown in FIGS. 7A and 7B. This valve opening amount data is obtained by closing the bypass valve 17 by continuously or stepwise reducing the opening amount of the bypass valve 17 based on the hot water temperature of the hot water supply heat exchanger 3 after stopping the additional heating alone operation. The opening amount of the bypass valve 17 is reduced as the hot water of the hot water supply heat exchanger 3 becomes low, and is made to correspond to the hot water temperature of the hot water supply heat exchanger 3 so as to close at a predetermined temperature Ta. The opening amount of the bypass valve 17 is given.
【００９０】この開弁量データは、給湯熱交換器３の湯
温に応じて追い焚き単独運転による高温出湯と、ポスト
ポンプに起因したアンダーシュート出湯とを共に回避す
ることができるバイパス弁１７の最適な開弁量が給湯熱
交換器３の湯温毎に実験や演算等によって求め、給湯熱
交換器３の湯温に対応させてデータ格納部４８に格納さ
れている。The valve opening amount data is obtained from the bypass valve 17 which can avoid both high-temperature hot water supply by reheating alone operation according to the hot water temperature of the hot water supply heat exchanger 3 and undershoot hot water output by the post pump. The optimum valve opening amount is obtained by experiment or calculation for each hot water temperature of the hot water supply heat exchanger 3 and stored in the data storage unit 48 in correspondence with the hot water temperature of the hot water supply heat exchanger 3.
【００９１】バイパス弁制御部４７は、追い焚き単独運
転監視部４６から取り込まれる監視情報に基づき、追い
焚き単独運転中である、又は、追い焚き単独運転が終了
したと検知したときに、データ格納部４８から上記開弁
量データを読み出す。また、バイパス弁制御部４７は、
追い焚き単独運転監視部４６の監視情報に基づき、追い
焚き単独運転が終了したと検知したときに、給湯熱交換
器湯温センサ３３のセンサ出力の取り込みを開始する。The bypass valve control unit 47 stores the data when it is detected that the reheating operation is being performed or the reheating operation is completed based on the monitoring information taken in from the reheating independent operation monitoring unit 46. The valve opening amount data is read from the section 48. In addition, the bypass valve control unit 47
Based on the monitoring information of the additional heating independent operation monitoring unit 46, when it is detected that the additional heating alone operation is completed, the sensor output of the hot water supply heat exchanger hot water temperature sensor 33 is started.
【００９２】そして、バイパス弁制御部４７は時々刻々
と取り込まれる給湯熱交換器湯温センサ３３のセンサ出
力に基づいて検出される給湯熱交換器３の湯温と、前記
開弁量データとに基づき、バイパス弁１７の開弁量を連
続的に又は段階的に絞っていきバイパス弁１７を閉弁さ
せる。なお、バイパス弁１７の開弁量の可変制御手法に
は様々な手法が提案されており、この実施形態例では、
それら提案の開弁量可変制御手法のうちのいずれの手法
を用いてバイパス弁１７の開弁量を可変制御してもよ
く、ここでは、その開弁量制御手法の説明は省略する。Then, the bypass valve control section 47 calculates the hot water temperature of the hot water supply heat exchanger 3 detected based on the sensor output of the hot water supply heat exchanger hot water temperature sensor 33 and the valve opening amount data. Based on this, the opening amount of the bypass valve 17 is continuously or stepwise reduced to close the bypass valve 17. Various methods have been proposed for variable control of the opening amount of the bypass valve 17, and in this embodiment,
The valve opening amount of the bypass valve 17 may be variably controlled by using any of the proposed valve opening amount variable control methods, and the description of the valve opening amount control method is omitted here.
【００９３】この実施形態例によれば、追い焚き単独運
転の停止後に、給湯熱交換器３の湯温に基づきバイパス
弁１７の開弁量を連続的に又は段階的に絞っていきバイ
パス弁１７を閉弁させるので、追い焚き単独運転停止後
に、給湯熱交換器３の湯温の低下に従って変化するバイ
パス弁１７の最適な開弁量に応じて、つまり、追い焚き
単独運転に起因した高温出湯と、ポストポンプに起因し
たアンダーシュート出湯とを共に回避することができる
バイパス通路１６の最適な水量を得るためのバイパス弁
１７の開弁量の変化に応じて、バイパス弁１７の開弁量
を可変制御することが可能であり、追い焚き単独運転停
止後に給湯が行われるときには、ほぼ給湯設定温度の湯
を出湯させることができる。According to this embodiment, after the reheating alone operation is stopped, the opening amount of the bypass valve 17 is continuously or stepwise reduced based on the hot water temperature of the hot water supply heat exchanger 3, and the bypass valve 17 is stopped. Is closed, after the reheating alone operation is stopped, according to the optimal opening amount of the bypass valve 17 that changes according to the decrease in the hot water temperature of the hot water supply heat exchanger 3, that is, the high-temperature tapping caused by the reheating alone operation. The opening amount of the bypass valve 17 is changed in accordance with a change in the opening amount of the bypass valve 17 for obtaining the optimum amount of water in the bypass passage 16 that can avoid the undershoot hot water caused by the post pump. Variable control can be performed, and when hot water is supplied after the stoppage of the independent heating operation, hot water having substantially the set hot water supply temperature can be discharged.
【００９４】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、上記各実施形態例では、追い焚き単独運転監視部
４６は、バーナー２の燃焼を検知し、水量センサ３１が
給水通路１３の通水を検知しておらず、かつ、水流セン
サ３６が追い焚き循環通路２４の通水を検知していると
きに、追い焚き単独運転が行われていると検知していた
が、追い焚き単独運転監視部４６は、バーナー２の燃焼
を検知し、給湯確認スイッチ３５が追い焚き熱交換器４
の通水を検知しておらず、かつ、循環ポンプ２０が駆動
しているときに、追い焚き単独運転が行われていると検
知するようにしてもよい。The present invention is not limited to the above embodiments, but may take various embodiments. For example, in each of the above-described embodiments, the reheating independent operation monitoring unit 46 detects the combustion of the burner 2, the water amount sensor 31 does not detect the flow of water in the water supply passage 13, and the water flow sensor 36 detects the combustion. While detecting the passage of water through the heating circulation passage 24, it was detected that the additional heating alone operation was being performed. However, the additional heating independent operation monitoring unit 46 detected the combustion of the burner 2 and confirmed the hot water supply. Switch 35 is reheating heat exchanger 4
May not be detected, and when the circulation pump 20 is being driven, it may be detected that the reheating alone operation is being performed.
【００９５】また、上記各実施形態例に示した閉弁時間
データや保有熱量データや開弁量データは、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により構成してもよ
い。Although the valve closing time data, the retained heat amount data, and the valve opening amount data shown in the above embodiments are constituted by graph data, data other than graph data such as table data and arithmetic expression data are used. You may comprise by format.
【００９６】さらに、上記第３の実施形態例では、保有
熱量検出部５５は、追い焚き単独運転時のバーナー２の
燃焼熱量情報と、時間計測部５４が計測する追い焚き単
独運転時間とに基づいて、給湯熱交換器３の保有熱量を
検出していたが、例えば、給気通路６を通ってバーナー
２に供給される給気の温度を検出する給気温度センサ２
７を、例えば、ガスノズル１９等に設け、保有熱量検出
部５５は、追い焚き単独運転時のバーナー２の燃焼熱量
情報と時間計測部５４の計測時間の情報以外に、上記給
気温度センサ２７が検出する給気温度をも考慮して、追
い焚き単独運転によって給湯熱交換器３に与えられた保
有熱量を求めてもよい。Further, in the third embodiment, the retained calorie detection unit 55 determines the amount of combustion heat of the burner 2 during the reheating alone operation and the reheating independent operation time measured by the time measuring unit 54. Although the amount of heat retained in the hot water supply heat exchanger 3 has been detected, for example, the supply air temperature sensor 2 for detecting the temperature of the supply air supplied to the burner 2 through the supply air passage 6.
7 is provided in, for example, the gas nozzle 19 and the like, and the retained calorie detection unit 55 detects the supply air temperature sensor 27 in addition to the information on the combustion heat amount of the burner 2 and the information on the measurement time of the time measurement unit 54 during the reheating alone operation. In consideration of the supply air temperature to be detected, the retained heat amount given to the hot water supply heat exchanger 3 by the reheating alone operation may be obtained.
【００９７】さらに、上記第４の実施形態例では、ポス
トポンプ中に追い焚き循環通路２４の循環湯水温を風呂
温度センサ３７によって実測していたが、ポストポンプ
は、浴槽２２の湯が風呂温度設定手段４３に設定されて
いる風呂の温度に達して追い焚き運転が終了した後に、
循環ポンプ２０の継続駆動を行うことであることから、
ポストポンプ中の追い焚き循環通路２４の循環湯水温は
風呂温度設定手段４３に設定されている風呂設定温度で
あると推定することができる。このことから、風呂温度
設定手段４３を循環通路温度検出手段として機能させ、
ポストポンプ中の追い焚き循環通路２４の循環湯水温は
風呂温度設定手段４３に設定されている風呂の設定温度
であると推定してもよい。Further, in the fourth embodiment, the temperature of the circulating hot water in the re-heating circulation passage 24 is actually measured by the bath temperature sensor 37 during the post-pump. After the temperature of the bath set in the setting means 43 has been reached and the reheating operation has been completed,
Since the continuous drive of the circulation pump 20 is performed,
The temperature of the circulating hot water in the additional heating circulation passage 24 in the post pump can be estimated to be the bath set temperature set in the bath temperature setting means 43. From this, the bath temperature setting means 43 is made to function as a circulation passage temperature detecting means,
The temperature of the circulating hot water in the additional heating circulation passage 24 in the post pump may be estimated to be the set temperature of the bath set in the bath temperature setting means 43.
【００９８】さらに、上記第５の実施形態例や第７の実
施形態例では、追い焚き単独運転停止後の給湯熱交換器
３の湯温を検出するために、給湯熱交換器３に給湯熱交
換器湯温センサ３３を設け、この給湯熱交換器湯温セン
サ３３により給湯熱交換器３の湯温を実測していたが、
例えば、給湯熱交換器湯温センサ３３の代わりに、給湯
熱交換器湯水温度検出手段として湯水温推定検出手段を
制御装置４０に設け、この湯水温推定検出部により、追
い焚き単独運転の停止後に次のように給湯熱交換器３の
湯温を推定検出するようにしてもよい。Further, in the fifth embodiment and the seventh embodiment, the hot water supply heat exchanger 3 is supplied to the hot water supply heat exchanger 3 in order to detect the hot water temperature of the hot water supply heat exchanger 3 after the reheating alone operation is stopped. An exchange hot water temperature sensor 33 is provided, and the hot water temperature of the hot water supply heat exchanger 3 is actually measured by the hot water supply heat exchanger hot water temperature sensor 33.
For example, instead of the hot-water supply heat exchanger hot-water temperature sensor 33, a hot-water temperature estimation detecting means is provided in the control device 40 as hot-water supply heat exchanger hot-water temperature detecting means. The hot water temperature of the hot water supply heat exchanger 3 may be estimated and detected as follows.
【００９９】例えば、追い焚き単独運転が終了してから
の経過時間に基づいて給湯熱交換器３の湯温を推定検出
するための給湯熱交換器湯温データを、ポストポンプに
よる湯温低下を考慮して予め実験や演算等により求め湯
水温推定検出手段やデータ格納部４８に与えておき、湯
水温推定検出部は、追い焚き単独運転が終了してからの
経過時間と上記給湯熱交換器湯温データに基づいて、追
い焚き単独運転停止後に給湯熱交換器３の湯温を時々刻
々と推定検出する。このように、追い焚き単独運転の停
止後に給湯熱交換器３の湯温を推定検出する湯水温推定
検出部を設け、この湯水温推定検出部により、追い焚き
単独運転停止後の給湯熱交換器３の湯水温を推定検出し
てもよい。For example, the hot water supply heat exchanger hot water temperature data for estimating and detecting the hot water temperature of the hot water supply heat exchanger 3 based on the elapsed time from the end of the reheating alone operation is used to calculate the hot water temperature drop by the post pump. In consideration of this, it is obtained in advance by experiments, calculations, or the like, and given to the hot water temperature estimation detecting means and the data storage unit 48. The hot water temperature estimation detecting unit determines the elapsed time since the end of the reheating alone operation and the hot water supply heat exchanger. Based on the hot-water temperature data, the hot-water temperature of the hot-water supply heat exchanger 3 is estimated and detected every moment after the independent operation of the additional heating is stopped. As described above, the hot water temperature estimating and detecting section for estimating and detecting the hot water temperature of the hot water supply heat exchanger 3 is provided after the stop-heating alone operation is stopped. The third hot water temperature may be estimated and detected.
【０１００】さらに、上記各実施形態例は、図８に示す
一缶二水路風呂給湯器を例にして説明したが、給湯熱交
換器と追い焚き熱交換器が一体化した一缶二水路タイプ
で、給湯熱交換器の入側の給湯通路と出側の給水通路を
短絡するバイパス弁付きのバイパス通路が設けられ、追
い焚き単独運転中にバイパス弁を開弁させるバイパス弁
の開弁制御と、追い焚き運転停止後に循環ポンプの継続
駆動を行うポストポンプ制御とを行う一缶二水路風呂給
湯器であれば、図８の一缶二水路給湯器に限定されず
に、この発明を適用することができる。Further, each of the above embodiments has been described with reference to an example of a one-can, two-channel bath water heater shown in FIG. 8. A bypass passage with a bypass valve for short-circuiting the hot water supply passage on the inlet side and the water supply passage on the outlet side of the hot water supply heat exchanger is provided, and a bypass valve opening control for opening the bypass valve during reheating alone operation and The present invention is not limited to the one-tank two-channel water heater shown in FIG. 8 and is applicable to the present invention as long as it is a one-tank two-channel water heater that performs post-pump control for continuously driving the circulation pump after the reheating operation is stopped. be able to.
【０１０１】[0101]
【発明の効果】この発明によれば、バイパス弁制御部を
設け、このバイパス弁制御部によって、追い焚き単独運
転が停止してからの経過時間が予め定められたバイパス
弁閉弁時間に達したときにバイパス弁を閉弁させるよう
にしたので、追い焚き単独運転の停止後に、追い焚き単
独運転に起因した高温出湯と、ポストポンプに起因した
アンダーシュートの湯の出湯とを共に回避することがで
きるバイパス弁の閉弁タイミングを求めてバイパス弁閉
弁時間として与えておくことにより、バイパス弁制御部
のバイパス弁閉弁制御動作によって、追い焚き単独運転
の停止後に、高温出湯とアンダーシュートの湯の出湯と
を共に回避することができるバイパス弁の閉弁タイミン
グでバイパス弁を閉弁させることができる。このことか
ら、追い焚き単独運転停止後に、高温出湯とアンダーシ
ュートの湯の出湯とを共に回避することができ、ほぼ給
湯設定温度の湯を出湯させることが可能である。According to the present invention, the bypass valve control unit is provided, and the elapsed time from the stop of the reheating alone operation reaches the predetermined bypass valve closing time by the bypass valve control unit. Since the bypass valve is sometimes closed, it is possible to avoid both the high-temperature hot water caused by the reheating alone operation and the undershoot hot water caused by the post pump after the reheating alone operation is stopped. By determining the closing timing of the bypass valve and giving it as the bypass valve closing time, the bypass valve closing control operation of the bypass valve control unit causes the hot water and the undershoot hot water to be discharged after the stoppage of the independent heating operation. The bypass valve can be closed at the valve closing timing of the bypass valve which can avoid both. From this, it is possible to avoid both high-temperature hot water supply and undershoot hot water supply after the reheating alone operation is stopped, and it is possible to supply hot water at a hot water supply set temperature.
【０１０２】また、閉弁時間可変設定部を設け、この閉
弁時間可変設定部により、給湯設定手段に設定されてい
る給湯設定温度に基づいて、又は、追い焚き単独運転に
より給湯熱交換器に与えられた保有熱量に基づいて、又
は、ポストポンプ中に追い焚き循環通路を循環する循環
湯水温に基づいて、バイパス弁閉弁時間を可変設定する
構成にあっては、高温出湯とアンダーシュートの湯の出
湯とを共に回避することができるバイパス弁の最適な閉
弁タイミングは上記給湯設定温度や給湯熱交換器の保有
熱量や追い焚き循環通路の循環湯水温によって僅かに可
変してしまうので、上記給湯設定温度や給湯熱交換器の
保有熱量や追い焚き循環通路の循環湯水温に基づき、バ
イパス弁の最適な閉弁タイミングでバイパス弁を閉弁さ
せることができるようにバイパス弁閉弁時間を可変設定
することで、追い焚き単独運転停止後に、高温出湯とア
ンダーシュート出湯とを共に回避することができるバイ
パス弁の最適な閉弁タイミングでバイパス弁を閉弁させ
ることができ、より確実に高温出湯とアンダーシュート
出湯とを共に回避することができ、追い焚き単独運転停
止後の給湯時にほぼ給湯設定温度の湯を出湯させること
が可能である。Further, a variable valve closing time setting section is provided, and the variable valve closing time setting section controls the hot water supply heat exchanger based on the hot water supply setting temperature set in the hot water supply setting means or by the reheating alone operation. Based on the given amount of retained heat, or based on the temperature of the circulating hot water circulating in the post-pump post-pump circulating passage, the bypass valve closing time is variably set, the high-temperature hot water and undershoot Since the optimal valve closing timing of the bypass valve that can avoid both hot water and hot water varies slightly depending on the set hot water supply temperature, the amount of heat held by the hot water supply heat exchanger, and the temperature of the circulating hot water in the additional heating circulation passage, The bypass valve can be closed at the optimal closing timing of the bypass valve based on the hot water supply set temperature, the amount of heat retained by the hot water supply heat exchanger, and the circulating water temperature in the reheating circulation passage. By setting the bypass valve closing time variably as described above, it is possible to avoid both high-temperature hot water and undershoot hot water after the independent operation of reheating, and to close the bypass valve at the optimal closing timing of the bypass valve. This makes it possible to more reliably avoid both high-temperature hot water supply and undershoot hot water supply, and it is possible to supply hot water at a hot water supply set temperature almost at the time of hot water supply after the stoppage of the additional heating operation.
【０１０３】給湯熱交換器の湯水温度を検出する給湯熱
交換器湯水温度検出手段を設け、追い焚き単独運転停止
後に給湯熱交換器湯水温度検出手段が検出する給湯熱交
換器の湯水温度が予め定めたバイパス弁閉弁温度に低下
したときにバイパス弁制御部がバイパス弁を閉弁させる
発明にあっては、バイパス弁の閉弁により高温出湯とア
ンダーシュートの湯の出湯とを共に回避することができ
るときの給湯熱交換器の湯温をバイパス弁閉弁温度とし
て設定しておくことによって、追い焚き単独運転停止後
に、バイパス弁制御部のバイパス弁閉弁制御によってバ
イパス弁を閉弁させることにより、高温出湯とアンダー
シュート出湯とを共に回避することができる。A hot-water supply heat exchanger hot-water temperature detection means for detecting hot-water temperature of the hot-water supply heat exchanger is provided, and the hot-water temperature of the hot-water supply heat exchanger detected by the hot-water supply heat exchanger hot-water temperature detection means after the additional heating operation is stopped. In the invention in which the bypass valve control unit closes the bypass valve when the temperature drops to the predetermined bypass valve closing temperature, it is possible to avoid both hot water supply and undershoot water supply by closing the bypass valve. By setting the hot water temperature of the hot water supply heat exchanger as possible as the bypass valve closing temperature, after the reheating alone operation is stopped, the bypass valve is closed by the bypass valve closing control of the bypass valve control unit. In addition, both high-temperature hot water and undershoot hot water can be avoided.
【０１０４】バイパス弁がバイパス通路の通水流量を連
続的に又は段階的に可変することができる流量制御弁に
より構成され、追い焚き単独運転停止後に、追い焚き単
独運転が停止してからの経過時間に基づいて、又は、給
湯熱交換器湯水温度検出手段が検出する給湯熱交換器の
湯水温に基づいて、バイパス弁制御部がバイパス弁の開
弁量を連続的に又は段階的に絞っていきバイパス弁を閉
弁させる発明にあっては、追い焚き単独運転の停止後
に、高温出湯とアンダーシュート出湯とを回避するため
にバイパス通路から給湯熱交換器の湯に加える最適な水
量は給湯熱交換器の湯温の低下に従って減少していくの
で、追い焚き単独運転が停止していからの経過時間や給
湯熱交換器の湯温に基づいてバイパス弁の開弁量を絞っ
ていくことによって、高温出湯とアンダーシュート出湯
とを共に回避するための最適な水量をバイパス通路から
給湯熱交換器の湯に加えることが可能であり、より確実
に高温出湯とアンダーシュート出湯とを共に回避するこ
とができ、追い焚き単独運転の停止後に給湯設定温度
に、より近い湯温の湯を出湯させることができる。The bypass valve is constituted by a flow control valve capable of continuously or stepwise varying the flow rate of water in the bypass passage. On the basis of time or on the basis of the hot or cold water temperature of the hot water supply heat exchanger detected by the hot or cold water supply heat exchanger, the bypass valve control section continuously or stepwise reduces the opening amount of the bypass valve. According to the invention in which the bypass valve is closed, the optimum amount of water to be added to the hot water in the hot water supply heat exchanger from the bypass passage after the stoppage of the reheating alone operation is to avoid hot water and undershoot hot water. As the hot water temperature of the exchanger decreases as the temperature decreases, the opening amount of the bypass valve can be reduced based on the elapsed time since the reheating alone operation stopped and the hot water temperature of the hot water supply heat exchanger. It is possible to add the optimal amount of water for avoiding both high-temperature hot water and undershoot hot water to the hot-water supply heat exchanger hot water from the bypass passage, and to more reliably avoid both high-temperature hot water and undershoot hot water. It is possible to discharge hot water having a hot water temperature closer to the set hot water supply temperature after the stop-heating alone operation is stopped.
【図面の簡単な説明】[Brief description of the drawings]
【図１】この発明の一缶二水路風呂給湯器において特徴
的な制御構成の一例を示すブロック構成図である。FIG. 1 is a block diagram showing an example of a characteristic control configuration in a one-can two-channel bath water heater of the present invention.
【図２】給湯設定温度に応じてバイパス弁閉弁時間を可
変設定するための閉弁時間データの一例を示すグラフで
ある。FIG. 2 is a graph showing an example of valve closing time data for variably setting a bypass valve closing time according to a hot water supply set temperature.
【図３】追い焚き単独運転中に給湯熱交換器に与えられ
る給湯熱交換器の保有熱量に基づいてバイパス弁の閉弁
時間を可変設定する閉弁時間設定部の制御構成の一例を
示すブロック構成図である。FIG. 3 is a block diagram illustrating an example of a control configuration of a valve closing time setting unit that variably sets a valve closing time of a bypass valve based on the amount of heat held by the hot water supply heat exchanger supplied to the hot water supply heat exchanger during the additional heating operation. It is a block diagram.
【図４】追い焚き単独運転時間の経過に従って給湯熱交
換器に与えられる給湯熱交換器の保有熱量の変化を示す
グラフである。FIG. 4 is a graph showing a change in the amount of heat retained by the hot water supply heat exchanger to be supplied to the hot water supply heat exchanger with the lapse of the reheating alone operation time.
【図５】追い焚き単独運転に起因して給湯熱交換器に与
えられた保有熱量に応じてバイパス弁閉弁時間を可変設
定するための閉弁時間データの一例を示すグラフであ
る。FIG. 5 is a graph showing an example of valve closing time data for variably setting a bypass valve closing time in accordance with a retained heat amount given to a hot water supply heat exchanger due to a reheating alone operation.
【図６】追い焚き単独運転が停止してからの経過時間に
応じてバイパス弁の開弁量を可変設定するための開弁量
データの一例を示すグラフである。FIG. 6 is a graph showing an example of valve opening amount data for variably setting the valve opening amount of a bypass valve in accordance with the elapsed time from when the additional heating alone operation is stopped.
【図７】追い焚き単独運転停止後の給湯熱交換器の湯温
に応じてバイパス弁の開弁量を可変設定するための開弁
量データの一例を示すグラフである。FIG. 7 is a graph showing an example of valve opening amount data for variably setting the valve opening amount of a bypass valve in accordance with the hot water temperature of the hot water supply heat exchanger after the additional heating alone operation is stopped.
【図８】一缶二水路風呂給湯器の一例を示すモデル図で
ある。FIG. 8 is a model diagram showing an example of a one-can two-channel bath water heater.
２ バーナー ３ 給湯熱交換器 ４ 追い焚き熱交換器 １３ 給水通路 １４ 給湯通路 １６ バイパス通路 １７ バイパス弁 ２０ 循環ポンプ ２４ 追い焚き循環通路 ３３ 給湯熱交換器湯温センサ ３７ 風呂温度センサ ４２ 給湯温度設定手段 ４６ 追い焚き単独運転監視部 ４７ バイパス弁制御部 ５０ 時間計測部 ５２ 閉弁時間可変設定部 2 Burner 3 Hot water supply heat exchanger 4 Reheating heat exchanger 13 Water supply passage 14 Hot water supply passage 16 Bypass passage 17 Bypass valve 20 Circulation pump 24 Reheating circulation passage 33 Hot water supply heat exchanger hot water temperature sensor 37 Bath temperature sensor 42 Hot water supply temperature setting means 46 Reheating independent operation monitoring unit 47 Bypass valve control unit 50 Time measurement unit 52 Valve closing time variable setting unit
───────────────────────────────────────────────────── フロントページの続き (72)発明者 和泉沢 享 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 (72)発明者 渡辺 久恭 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 (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 ──────────────────────────────────────────────────の Continuing from the front page (72) Inventor Satoshi Izumizawa 3-4 Fukamidai, Yamato-shi, Kanagawa Pref. Inside the Gaster Co., Ltd. (72) Inventor Hisatoya Watanabe 3-4 Fukamidai, Yamato-shi, Kanagawa Pref. 72) Inventor Takeo Yamaguchi 3-4 Fukamidai, Yamato City, Kanagawa Prefecture Inside Gaster Co., Ltd.
Claims (7)
給湯通路へ供給する給湯熱交換器と、上記給湯熱交換器
の入側の給水通路と出側の給湯通路を短絡するバイパス
通路と、該バイパス通路の開閉を行うバイパス弁と、浴
槽湯水の追い焚き循環通路に組み込まれる循環ポンプ
と、上記追い焚き循環通路に組み込まれ上記循環ポンプ
の駆動により追い焚き循環通路を循環する循環湯水を追
い焚きする追い焚き熱交換器とを有し、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共通に燃焼加熱する
バーナーが設けられており、追い焚き運転の停止後に循
環ポンプを継続駆動するポストポンプ制御と、給湯運転
を行わず追い焚き運転だけを行う追い焚き単独運転時に
上記バイパス弁を開弁するバイパス弁の開弁制御とを行
う一缶二水路風呂給湯器であって、追い焚き単独運転が
行われているか否かを監視する追い焚き単独運転監視部
と；バイパス弁閉弁時間が予め与えられており、上記追
い焚き単独運転監視部に監視された追い焚き単独運転が
停止してからの経過時間が上記バイパス弁閉弁時間に達
したときにバイパス弁を閉弁させるバイパス弁制御部
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 guided from a water supply passage to supply hot water to the hot water supply passage, and a bypass passage for short-circuiting an inlet-side water supply passage and an outlet-side hot water supply passage of the hot water supply heat exchanger. A bypass valve that opens and closes the bypass passage, a circulation pump that is incorporated in the reheating circulation passage of the bathtub hot water, and a circulation hot water that is incorporated in the reheating circulation passage and circulates in the reheating circulation passage by driving the circulation pump. A reheater for reheating the water, the above-mentioned hot water supply heat exchanger and the reheater heat exchanger are integrated, and the integrated hot water supply heat exchanger and the reheater heat exchanger are commonly used for combustion heating. There is a burner that operates the post-pump control, which continuously drives the circulation pump after the reheating operation stops, and opens the bypass valve during the reheating alone operation, which performs only the reheating operation without performing the hot water supply operation. A single-can, two-channel bath water heater that performs valve opening control of a bypass valve, and a reheating single operation monitoring unit that monitors whether the reheating alone operation is performed; A bypass valve control unit that closes the bypass valve when the elapsed time from the stop of the additional heating alone operation monitored by the additional heating independent operation monitoring unit reaches the bypass valve closing time. And a two-channel water heater.
備えられ、上記給湯温度設定手段に設定されている給湯
設定温度が高くなるに従ってバイパス弁閉弁時間を短く
する方向に可変設定する閉弁時間可変設定部を設けたこ
とを特徴とする請求項１記載の一缶二水路風呂給湯器。2. A hot water supply temperature setting means for setting a hot water supply temperature, wherein the valve closing time is variably set in a direction to shorten a bypass valve closing time as a hot water supply set temperature set in the hot water supply temperature setting means increases. 2. The one-can two-channel water heater according to claim 1, further comprising a variable time setting unit.
転を行っている時間を計測する時間計測部と；追い焚き
単独運転時の燃焼熱量情報と上記時間計測部により計測
された追い焚き単独運転時間をパラメータとして追い焚
き単独運転によるバーナーの燃焼熱により給湯熱交換器
に与えられた給湯熱交換器の保有熱量を求め、該保有熱
量に応じてバイパス弁閉弁時間を可変設定する閉弁時間
可変設定部を設けたことを特徴とする請求項１記載の一
缶二水路風呂給湯器。3. A time measuring unit for measuring a time during which the one-can-two-channel bath water heater performs the reheating alone operation; a combustion heat amount information during the reheating alone operation and the reheating measured by the time measuring unit. Using the single operation time as a parameter, determine the retained heat amount of the hot water supply heat exchanger given to the hot water supply heat exchanger by the combustion heat of the burner in the reheating alone operation, and variably set the bypass valve closing time according to the retained heat amount. The one-tank two-channel bath water heater according to claim 1, further comprising a variable valve time setting section.
環する循環湯水の温度を検出する循環通路温度検出手段
が設けられ、上記循環通路温度検出手段が検出する温度
に基づき上記検出温度が高くなるに従ってバイパス弁閉
弁時間を長くする方向に可変設定する閉弁時間可変設定
部を設けたことを特徴とする請求項１記載の一缶二水路
風呂給湯器。4. A circulation path temperature detecting means for detecting the temperature of circulating hot and cold water circulating in a post-pumping circulation path in the post pump, and the detected temperature increases based on the temperature detected by the circulation path temperature detecting means. 2. A one-tank two-channel bath water heater according to claim 1, further comprising a valve closing time variable setting section for variably setting the bypass valve closing time in a direction of increasing the valve closing time in accordance with the following.
給湯通路へ供給する給湯熱交換器と、上記給湯熱交換器
の入側の給水通路と出側の給湯通路を短絡するバイパス
通路と、該バイパス通路の開閉を行うバイパス弁と、浴
槽湯水の追い焚き循環通路に組み込まれる循環ポンプ
と、上記追い焚き循環通路に組み込まれ上記循環ポンプ
の駆動により追い焚き循環通路を循環する循環湯水を追
い焚きする追い焚き熱交換器とを有し、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共通に燃焼加熱する
バーナーが設けられており、追い焚き運転の停止後に循
環ポンプを継続駆動するポストポンプ制御と、給湯運転
を行わず追い焚き運転だけを行う追い焚き単独運転時に
上記バイパス弁を開弁させるバイパス弁の開弁制御とを
行う一缶二水路風呂給湯器であって、追い焚き単独運転
が行われているか否かを監視する追い焚き単独運転監視
部と；給湯熱交換器の湯水温を検出する給湯熱交換器湯
水温度検出手段と；バイパス弁閉弁温度が予め与えら
れ、追い焚き単独運転の停止後に上記給湯熱交換器湯水
温度検出手段が検出する湯水温度が上記バイパス弁閉弁
温度に低下したときにバイパス弁を閉弁するバイパス弁
制御部と；を設けたことを特徴とする一缶二水路風呂給
湯器。5. A hot water supply heat exchanger for heating water guided from a water supply passage and supplying hot water to the hot water supply passage, and a bypass passage for short-circuiting an inlet-side water supply passage and an outlet-side hot water supply passage of the hot water supply heat exchanger. A bypass valve that opens and closes the bypass passage, a circulation pump that is incorporated in the reheating circulation passage of the bathtub hot water, and a circulation hot water that is incorporated in the reheating circulation passage and circulates in the reheating circulation passage by driving the circulation pump. A reheater for reheating the water, the above-mentioned hot water supply heat exchanger and the reheater heat exchanger are integrated, and the integrated hot water supply heat exchanger and the reheater heat exchanger are commonly used for combustion heating. There is a burner that operates the post-pump control, which continuously drives the circulation pump after the reheating operation stops, and opens the bypass valve during the reheating alone operation, which performs only the reheating operation without performing the hot water supply operation. A single-can, two-channel bath water heater that performs valve opening control of a bypass valve to be operated, and a reheating alone operation monitoring unit that monitors whether the reheating alone operation is performed; and a hot water temperature of the hot water supply heat exchanger A hot water supply heat exchanger hot water temperature detecting means for detecting the temperature of the bypass valve; a hot water temperature detected by the hot water supply heat exchanger hot water temperature detecting means after the stop-heating alone operation is stopped; And a bypass valve control unit for closing the bypass valve when the temperature drops to a temperature.
給湯通路へ供給する給湯熱交換器と、上記給湯熱交換器
の入側の給水通路と出側の給湯通路を短絡するバイパス
通路と、該バイパス通路に介設されるバイパス弁と、浴
槽湯水の追い焚き循環通路に組み込まれる循環ポンプ
と、上記追い焚き循環通路に組み込まれ上記循環ポンプ
の駆動により追い焚き循環通路を循環する循環湯水を追
い焚きする追い焚き熱交換器とを有し、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共通に燃焼加熱する
バーナーが設けられており、追い焚き運転の停止後に循
環ポンプを継続駆動するポストポンプ制御と、給湯運転
を行わず追い焚き運転だけを行う追い焚き単独運転時に
上記バイパス弁を開弁させるバイパス弁の開弁制御とを
行う一缶二水路風呂給湯器であって、バイパス弁は開弁
量によってバイパス通路の通水流量を連続的に又は段階
的に可変することができる流量制御弁により構成されて
おり、追い焚き単独運転が停止してからの経過時間に基
づいてバイパス弁の開弁量を連続的に又は段階的に絞っ
ていきバイパス弁を閉弁させるための開弁量制御データ
が与えられ、追い焚き単独運転の停止後に、追い焚き単
独運転が停止してからの経過時間と上記開弁量制御デー
タに基づいてバイパス弁の開弁量を連続的に又は段階的
に絞っていきバイパス弁を閉弁するバイパス弁制御部が
設けられていることを特徴とする一缶二水路風呂給湯
器。6. A hot water supply heat exchanger for heating water guided from a water supply passage and supplying hot water to the hot water supply passage, and a bypass passage for short-circuiting an inlet-side water supply passage and an outlet-side hot water supply passage of the hot water supply heat exchanger. A bypass valve interposed in the bypass passage, a circulation pump incorporated in the reheating circulation passage of the bathtub hot water, and a circulation incorporated in the reheating circulation passage and circulating in the reheating circulation passage by driving the circulation pump. It has a reheating heat exchanger that reheats hot water, and the above-mentioned hot water supply heat exchanger and reheating heat exchanger are integrated, and the integrated hot water supply heat exchanger and reheating heat exchanger are commonly burned. A burner for heating is provided.The post-pump control that continuously drives the circulation pump after the reheating operation is stopped, and the bypass valve is opened during the reheating alone operation that performs only the reheating operation without performing the hot water supply operation. A one-tank two-channel bath water heater for performing valve opening control of a bypass valve, wherein the bypass valve is capable of continuously or stepwise varying a flow rate of water in a bypass passage according to an opening amount. The opening amount control for closing the bypass valve by continuously or stepwise reducing the opening amount of the bypass valve based on the elapsed time after the additional heating alone operation is stopped. Given data, after the stop-only operation is stopped, the opening amount of the bypass valve is continuously or stepwise reduced based on the elapsed time since the stop-only operation is stopped and the opening amount control data. A one-can-two-channel bath water heater characterized by being provided with a bypass valve control unit for closing a bypass valve.
給湯通路へ供給する給湯熱交換器と、上記給湯熱交換器
の入側の給水通路と出側の給湯通路を短絡するバイパス
通路と、該バイパス通路に介設されるバイパス弁と、浴
槽湯水の追い焚き循環通路に組み込まれる循環ポンプ
と、上記追い焚き循環通路に組み込まれ上記循環ポンプ
の駆動により追い焚き循環通路を循環する循環湯水を追
い焚きする追い焚き熱交換器とを有し、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共通に燃焼加熱する
バーナーが設けられており、追い焚き運転の停止後に循
環ポンプを継続駆動するポストポンプ制御と、給湯運転
を行わず追い焚き運転だけを行う追い焚き単独運転時に
上記バイパス弁を開弁させるバイパス弁の開弁制御とを
行う一缶二水路風呂給湯器であって、バイパス弁は開弁
量によってバイパス通路の通水流量を連続的に又は段階
的に可変することができる流量制御弁により構成され、
また、給湯熱交換器の湯温を検出するための給湯熱交換
器湯水温度検出手段が設けられており、該給湯熱交換器
湯水温度検出手段が検出する給湯熱交換器湯温が低下す
るに従ってバイパス弁の開弁量を連続的に又は段階的に
減少させるための開弁量制御データが与えられ、追い焚
き単独運転の停止後に、上記給湯熱交換器湯水温度検出
手段により検出された給湯熱交換器湯温と開弁量制御デ
ータに基づいてバイパス弁の開弁量を連続的に又は段階
的に絞っていきバイパス弁を閉弁するバイパス弁制御部
が設けられていることを特徴とする一缶二水路風呂給湯
器。7. A hot water supply heat exchanger for heating water guided from a water supply passage and supplying hot water to the hot water supply passage, and a bypass passage for short-circuiting an inlet-side water supply passage and an outlet-side hot water supply passage of the hot water supply heat exchanger. A bypass valve interposed in the bypass passage; a circulation pump incorporated in the reheating circuit of the bathtub hot water; It has a reheating heat exchanger that reheats hot water, and the above-mentioned hot water supply heat exchanger and reheating heat exchanger are integrated, and the integrated hot water supply heat exchanger and reheating heat exchanger are commonly burned. A burner for heating is provided, and the bypass valve is opened during the post-pump control that continuously drives the circulation pump after the stop of the reheating operation and the reheating only operation that performs only the reheating operation without performing the hot water supply operation. A one-tank two-channel bath water heater for performing valve opening control of a bypass valve, wherein the bypass valve is capable of continuously or stepwise varying a flow rate of water in a bypass passage according to a valve opening amount. Consisting of
Further, a hot water supply heat exchanger hot water temperature detection means for detecting the hot water temperature of the hot water supply heat exchanger is provided, and the hot water supply heat exchanger hot water temperature detected by the hot water supply heat exchanger hot water temperature detection means decreases. Opening amount control data for continuously or stepwise reducing the opening amount of the bypass valve is provided, and after the stop-heating alone operation is stopped, the hot-water supply heat detected by the hot-water supply heat exchanger hot-water temperature detecting means. A bypass valve control unit is provided for continuously or stepwise reducing the opening amount of the bypass valve based on the exchanger hot water temperature and the valve opening amount control data and closing the bypass valve. One can two canal bath water heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04474397A JP3880119B2 (en) | 1997-02-13 | 1997-02-13 | One can two water bath hot water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04474397A JP3880119B2 (en) | 1997-02-13 | 1997-02-13 | One can two water bath hot water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10227522A true JPH10227522A (en) | 1998-08-25 |
| JP3880119B2 JP3880119B2 (en) | 2007-02-14 |
Family
ID=12699935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04474397A Expired - Fee Related JP3880119B2 (en) | 1997-02-13 | 1997-02-13 | One can two water bath hot water heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3880119B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016008763A (en) * | 2014-06-24 | 2016-01-18 | 株式会社ガスター | Bath device |
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1997
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016008763A (en) * | 2014-06-24 | 2016-01-18 | 株式会社ガスター | Bath device |
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| Publication number | Publication date |
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| JP3880119B2 (en) | 2007-02-14 |
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