JPH08178428A - Bath water heater with exhaust heat recovery function and method for recovering exhaust heat and supplying hot water - Google Patents
Bath water heater with exhaust heat recovery function and method for recovering exhaust heat and supplying hot waterInfo
- Publication number
- JPH08178428A JPH08178428A JP33773394A JP33773394A JPH08178428A JP H08178428 A JPH08178428 A JP H08178428A JP 33773394 A JP33773394 A JP 33773394A JP 33773394 A JP33773394 A JP 33773394A JP H08178428 A JPH08178428 A JP H08178428A
- Authority
- JP
- Japan
- Prior art keywords
- water
- bath
- hot water
- heat exchanger
- exhaust heat
- 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.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 200
- 238000011084 recovery Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims description 13
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000002918 waste heat Substances 0.000 claims description 6
- 238000003303 reheating Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000008399 tap water Substances 0.000 abstract description 14
- 235000020679 tap water Nutrition 0.000 abstract description 14
- 239000007789 gas Substances 0.000 description 11
- 238000002485 combustion reaction Methods 0.000 description 7
- 238000003287 bathing Methods 0.000 description 5
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Heat-Pump Type And Storage Water Heaters (AREA)
- Control For Baths (AREA)
Abstract
(57)【要約】
【目的】従来再利用されることなく棄てられていた浴槽
の残り湯から排熱を回収し、回収した熱を有効利用す
る。
【構成】排熱回収時には、制御装置４が３方向バルブ３
１，３２に信号を送り、排熱回収用管路３０と管路１３
ａ及び循環行き管１６と連通させるように各バルブ３
１、３２を開口させる。これにより、浴槽１７の残り湯
は循環戻り管１６から第一３方向バルブ３１を経て排熱
回収用管路３０に至り、排熱回収用管路３０の途中に配
置されている水−水熱交換器３３において、管路８ａを
流れる上水との間で熱交換を行う。この熱交換により、
上水は加熱される。加熱した上水は給湯熱交換器５にお
いて再加熱された後、給湯栓１から給湯される。
(57) [Summary] [Purpose] To recover the exhaust heat from the remaining hot water in the bathtub, which was conventionally discarded without being reused, and utilize the recovered heat effectively. [Structure] At the time of exhaust heat recovery, the control device 4 uses the three-way valve 3
1, 32 to send a signal to the exhaust heat recovery pipe 30 and the pipe 13.
a and each valve 3 so as to communicate with the circulation feed pipe 16
1 and 32 are opened. As a result, the remaining hot water in the bathtub 17 reaches the exhaust heat recovery conduit 30 from the circulation return pipe 16 through the first three-way valve 31, and the water-water heat disposed in the middle of the exhaust heat recovery conduit 30. In the exchanger 33, heat is exchanged with the clean water flowing through the pipe 8a. By this heat exchange,
The tap water is heated. The heated tap water is reheated in the hot water heat exchanger 5 and then supplied from the hot water tap 1.
Description
【０００１】[0001]
【産業上の利用分野】本発明は排熱回収機能付き風呂給
湯器及び排熱を回収して給湯を行う方法に関し、特に
は、浴槽の残り湯の排熱を回収し、回収した排熱を有効
利用することができる風呂給湯器及び給湯方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bath water heater with an exhaust heat recovery function and a method for recovering exhaust heat to supply hot water, and particularly to recovering exhaust heat of hot water remaining in a bath and recovering the recovered exhaust heat. The present invention relates to a bath water heater and a hot water supply method that can be effectively used.
【０００２】[0002]
【従来の技術】図４は従来用いられてきた風呂給湯器の
概略を示している。この従来の風呂給湯器においては、
給湯運転時には、給湯栓１を開くと、水道水の直圧によ
って給水接続口２から水道水が流入し、給水検知器３か
ら給水が開始された旨の給水信号が制御装置４に送信さ
れる。給湯熱交換器５は給湯バーナ７の下方にファン９
を備えている。制御装置４は給水検知器３からの給水信
号を受信すると、ファン９に作動開始信号を送り、ファ
ン９の作動を開始させる。ファン９が作動すると、給湯
熱交換器５の上方に向かって送風が行われ、給湯バーナ
７におけるガスの燃焼用空気が送り込まれる。2. Description of the Related Art FIG. 4 schematically shows a conventional bath water heater. In this conventional bath water heater,
When the hot water tap 1 is opened during the hot water supply operation, tap water flows in from the water supply connection port 2 due to the direct pressure of the tap water, and the water supply detector 3 transmits a water supply signal to the control device 4 to the effect that the water supply has started. . The hot water supply heat exchanger 5 has a fan 9 below the hot water supply burner 7.
It has. When the controller 4 receives the water supply signal from the water supply detector 3, it sends an operation start signal to the fan 9 to start the operation of the fan 9. When the fan 9 operates, air is blown upward from the hot water supply heat exchanger 5, and gas combustion air in the hot water supply burner 7 is sent in.
【０００３】給湯熱交換器５の内部には、ガス供給源
（図示せず）に接続されているガス供給電磁弁６と、イ
グナイター７ａによって着火されるバーナ７とが配置さ
れている。制御装置４はファン回転検知装置（図示せ
ず）によりファン作動を確認すると、イグナイター７ａ
に着火信号を送り、しかる後にガス供給電磁弁６に信号
を送り、ガス供給電磁弁を開き、給湯バーナ７に着火さ
せる。給水接続口２に接続されている給水管路８内を流
れる上水は給湯バーナ７の燃焼熱を受けて加熱され、給
湯栓１から給湯される。また、ガス燃焼によって発生し
た排気ガスはファン９からの送風により、給湯熱交換器
５の排気口１０に向かって送られ、排気口１０を経て外
部に放出される。Inside the hot water supply heat exchanger 5, a gas supply electromagnetic valve 6 connected to a gas supply source (not shown) and a burner 7 ignited by an igniter 7a are arranged. When the controller 4 confirms the fan operation by the fan rotation detector (not shown), the igniter 7a
To the gas supply solenoid valve 6 to open the gas supply solenoid valve to ignite the hot water supply burner 7. The clean water flowing in the water supply conduit 8 connected to the water supply connection port 2 is heated by the combustion heat of the hot water supply burner 7 and is supplied from the hot water tap 1. Further, the exhaust gas generated by the gas combustion is sent to the exhaust port 10 of the hot water supply heat exchanger 5 by the air blown from the fan 9, and is discharged to the outside through the exhaust port 10.
【０００４】次に、自動給湯運転時には、制御装置４は
その旨の信号を受信すると、ソレノイドバルブ１８を開
き、給湯熱交換器５において加熱された温水が給水管路
８、管路１９、ソレノイドバルブ１８、循環ポンプ１
２、管路１３ａ、風呂熱交換器１４及び循環戻り管１６
を経る経路と循環往き管２０を経る経路の両経路または
どちらか一方の経路を経て浴槽１７に給湯される。給湯
量が設定値に達すると、制御装置４はソレノイドバルブ
１８を閉じ、浴槽１７への給湯を停止させる。その後、
浴槽１７内の湯温が設定温度に達するまで追い焚きを行
う。Next, during the automatic hot water supply operation, when the control device 4 receives a signal to that effect, the solenoid valve 18 is opened and the hot water heated in the hot water supply heat exchanger 5 is supplied with the water supply pipe line 8, the pipe line 19 and the solenoid. Valve 18, circulation pump 1
2, pipe line 13a, bath heat exchanger 14 and circulation return pipe 16
The hot water is supplied to the bathtub 17 through either or both of the route passing through and the route passing through the circulation outflow pipe 20. When the hot water supply amount reaches the set value, the control device 4 closes the solenoid valve 18 to stop hot water supply to the bathtub 17. afterwards,
Reheating is performed until the temperature of the hot water in the bathtub 17 reaches the set temperature.
【０００５】浴槽１７内の追い焚き時には、制御装置４
はソレノイドバルブ１１、１８を閉じ、循環ポンプ１２
を作動させる。これによって浴槽１７内の温水は循環往
き管２０、循環ポンプ１２及び管路１３ａを経て、風呂
熱交換器１４に流入する。温水が風呂熱交換器１４に流
入したと同時に、制御装置４は風呂熱交換器１４の下方
に配置されたファン２１に作動開始信号を送り、ファン
２１の作動を開始させる。ファン２１が作動することに
より、燃焼用空気が給湯バーナ１５に送られる。制御装
置４はファン回転検知装置（図示せず）によりファン作
動を確認した後、イグナイター７ａに着火信号を送り、
風呂熱交換器１４の風呂バーナ１５を着火させ、風呂熱
交換器１４に流入した温水を加熱する。このようにして
加熱された温水は、循環戻り管１６を経て、浴槽１７に
戻される。また、風呂バーナ１５の燃焼により発生した
排気ガスはファン２１の送風により、風呂熱交換器１４
内から排気口２２を経て、外部に放出される。At the time of reheating the inside of the bathtub 17, the control device 4
Closed the solenoid valves 11 and 18, and the circulation pump 12
Operate. As a result, the hot water in the bath 17 flows into the bath heat exchanger 14 via the circulation outflow pipe 20, the circulation pump 12 and the pipe line 13a. At the same time when the hot water flows into the bath heat exchanger 14, the control device 4 sends an operation start signal to the fan 21 arranged below the bath heat exchanger 14 to start the operation of the fan 21. By operating the fan 21, the combustion air is sent to the hot water supply burner 15. After confirming the fan operation by the fan rotation detection device (not shown), the control device 4 sends an ignition signal to the igniter 7a,
The bath burner 15 of the bath heat exchanger 14 is ignited to heat the hot water flowing into the bath heat exchanger 14. The hot water heated in this way is returned to the bath 17 via the circulation return pipe 16. Further, the exhaust gas generated by the combustion of the bath burner 15 is blown by the fan 21 so that the bath heat exchanger 14
It is released from the inside through the exhaust port 22.
【０００６】[0006]
【発明が解決しようとする課題】従来、浴槽の残り湯
は、例えば、洗濯用に使われる以外にほとんど用途がな
く、そのまま棄てられることが多かった。例えば、入浴
終了後に、浴槽１７の底部に配置されている脱水栓２３
を開けることにより、棄てられていた。すなわち、従来
は、残り湯がかなりの高温を保っている場合であって
も、何ら熱回収を行うことはされずに棄てられていた。Conventionally, the remaining hot water in the bathtub has almost no use other than for washing, for example, and is often discarded as it is. For example, after completion of bathing, the dehydration plug 23 arranged at the bottom of the bathtub 17
It was abandoned by opening. That is, conventionally, even when the remaining hot water is kept at a considerably high temperature, it is discarded without performing any heat recovery.
【０００７】本発明はこのような点に鑑みてなされたも
のであり、従来再利用されることなく棄てられていた浴
槽の残り湯の排熱を回収し、回収した熱を有効利用する
ことができる風呂給湯器及び給湯方法を提供することを
目的とする。The present invention has been made in view of the above circumstances, and it is possible to recover the exhaust heat of the remaining hot water in the bathtub, which has been discarded without being reused, and to effectively use the recovered heat. An object is to provide a bath water heater and a hot water supply method that can be used.
【０００８】[0008]
【課題を解決するための手段及び作用】この目的を達成
するため、本発明に係る風呂給湯器は、上水を加熱し、
給湯栓を介してこの加熱上水を供給する給湯熱交換器
と、浴槽水を再加熱して、浴槽に戻す風呂熱交換器とを
備える風呂給湯器に改良を加え、給湯熱交換器に向かう
上水が通る給水管路に設けられている水−水熱交換器
と、浴槽と水−水熱交換器との間を循環する排熱回収用
管路と、浴槽と風呂熱交換器との間を循環する浴槽水循
環管路と排熱回収用管路とを切り換え、浴槽と風呂熱交
換器及び水−水熱交換器の何れかとを連通させる管路切
り換え手段と、をさらに備えたことを特徴としている。To achieve this object, the bath water heater according to the present invention heats tap water,
A hot water supply heat exchanger that supplies this heated tap water via a hot water tap and a bath water heat exchanger that reheats the bathtub water and returns it to the bathtub are improved and headed for the hot water supply heat exchanger. Between the water-water heat exchanger provided in the water supply pipe through which the clean water passes, the exhaust heat recovery pipe circulating between the bathtub and the water-water heat exchanger, and the bathtub and the bath heat exchanger A bathtub water circulation pipeline that circulates between the bathtub and an exhaust heat recovery pipeline, and a pipeline switching unit that communicates the bathtub with any of the bath heat exchanger and the water-water heat exchanger. It has a feature.
【０００９】風呂熱交換器から浴槽に給湯を行う場合に
は、管路切り換え手段は浴槽と風呂熱交換器とを連通さ
せる。これにより、浴槽と風呂熱交換器との間を浴槽水
が循環できるようになり、浴槽水を浴槽水循環管路を介
して風呂熱交換器に導き、風呂熱交換器において加熱し
た後、浴槽に戻すことができる。すなわち、浴槽水の追
いだきを行うことが可能になる。When hot water is supplied from the bath heat exchanger to the bathtub, the conduit switching means connects the bath heat exchanger with the bath heat exchanger. This allows the bath water to circulate between the bath and the bath heat exchanger, guides the bath water to the bath heat exchanger through the bath water circulation conduit, heats it in the bath heat exchanger, and then Can be returned. That is, it becomes possible to replenish the bath water.
【００１０】浴槽の残り湯から排熱回収を行う場合に
は、管路切り換え手段により、浴槽と水−水熱交換器と
を連通状態にする。これにより、浴槽水は排熱回収用管
路を介して水−水熱交換器に導かれる。この水−水熱交
換器の内部には、上水が流れている給水管路も排熱回収
用管路とともに通っている。このため、水−水熱交換器
に導かれた浴槽水の排熱は水−水熱交換器を介して給水
管路内の上水に吸収され、上水の水温が上昇する。この
ようにして加熱された上水は給湯熱交換器において再び
加熱された後、あるいは、必要に応じて、再加熱されず
に、給湯栓から供給される。When recovering the exhaust heat from the remaining hot water in the bathtub, the pipe switching means brings the bathtub and the water-water heat exchanger into communication with each other. Thereby, the bath water is guided to the water-water heat exchanger via the exhaust heat recovery pipe line. Inside the water-water heat exchanger, a water supply line through which clean water flows is also passed together with an exhaust heat recovery line. Therefore, the exhaust heat of the bath water guided to the water-water heat exchanger is absorbed by the clean water in the water supply pipe via the water-water heat exchanger, and the water temperature of the clean water rises. The clean water heated in this way is supplied from the hot water tap after being reheated in the hot water supply heat exchanger or, if necessary, without being reheated.
【００１１】なお、管路切り換え手段は、例えば、浴槽
水循環管路及び排熱回収用管路の各々に設けられた三方
向バルブと、この三方向バルブを所望の方向に開口させ
る制御装置とからなる。The pipe line switching means comprises, for example, a three-way valve provided in each of the bath water circulation pipe line and the exhaust heat recovery pipe line, and a control device for opening the three-way valve in a desired direction. Become.
【００１２】また、本発明は、浴槽内の残り湯を該浴槽
と連通している循環管路内において循環させる過程と、
この循環管路内の任意の地点において残り湯と循環管路
とは別の管路を通る上水との間で熱交換を行う過程と、
加熱された上水を給湯栓を介して給湯する過程と、を備
えることを特徴とする排熱を回収して給湯を行う方法を
提供する。The present invention also provides a process of circulating the remaining hot water in the bathtub in a circulation line communicating with the bathtub,
A process of exchanging heat between the remaining hot water and the tap water passing through a pipeline different from the circulation pipeline at any point in the circulation pipeline,
A method for supplying hot water by recovering exhaust heat, comprising the step of supplying heated tap water through a hot water tap.
【００１３】入浴が終了した後、まず、ポンプその他の
適当な手段を用いて浴槽内の残り湯を浴槽と連通してい
る循環管路内において循環させる。この循環管路内の任
意の位置には水−水熱交換器が配置されており、この水
−水熱交換器内には上水が流れている他の管路も通って
いる。このため、循環管路内を循環している浴槽の残り
湯はこの水−水熱交換器を介して上水との間で熱交換を
行い、浴槽の残り湯の排熱は上水に吸収され、上水の水
温が上昇する。このようにして加熱された上水は、例え
ば、給湯栓を介して給湯される。After the bathing is completed, first, the remaining hot water in the bathtub is circulated in the circulation line communicating with the bathtub by using a pump or other appropriate means. A water-water heat exchanger is arranged at an arbitrary position in the circulation pipe, and other pipes through which clean water flows also pass through the water-water heat exchanger. Therefore, the hot water remaining in the bathtub circulating in the circulation pipe exchanges heat with the clean water via this water-water heat exchanger, and the waste heat of the hot water remaining in the bathtub is absorbed by the clean water. As a result, the temperature of clean water rises. The clean water heated in this way is supplied with hot water through, for example, a hot water tap.
【００１４】以上のように、本発明に係る風呂給湯器及
び給湯方法の何れによっても、浴槽の残り湯の排熱を回
収し、その回収された排熱により、上水を加熱すること
ができる。すなわち、従来棄てられていた浴槽の残り湯
の排熱の再利用の一手段を提供することができる。As described above, in any of the bath water heater and the hot water supply method according to the present invention, the waste heat of the hot water remaining in the bathtub can be recovered, and the recovered waste heat can heat the clean water. . That is, it is possible to provide a means for reusing the waste heat of the remaining hot water in the bathtub, which has been discarded in the past.
【００１５】[0015]
【実施例】図１は本発明に係る排熱回収機能付き風呂給
湯器の一実施例を示す。なお、図１において図３と同じ
参照符号は図３と同一又は類似の構成要素を表してお
り、それらの詳細な説明は省略する。FIG. 1 shows an embodiment of a bath water heater with an exhaust heat recovery function according to the present invention. In FIG. 1, the same reference numerals as those in FIG. 3 represent the same or similar components as those in FIG. 3, and detailed description thereof will be omitted.
【００１６】本実施例に係る排熱回収機能付き風呂給湯
器においては、循環ポンプ１２と風呂熱交換器１４とを
結ぶ管路１３ａと、循環戻り管１６とを連通させる浴槽
水循環管路３０が設けられている。In the bath water heater with the exhaust heat recovery function according to the present embodiment, the pipe line 13a connecting the circulation pump 12 and the bath heat exchanger 14 and the bath water circulation pipe line 30 for communicating the circulation return pipe 16 are provided. It is provided.
【００１７】管路１３ａと浴槽水循環管路３０とは第一
３方向バルブ３１を介して接続されており、同様に、循
環戻り管１６と浴槽水循環管路３０とは第二３方向バル
ブ３２を介して接続されている。これら二つの３方向バ
ルブ３１，３２は各々制御装置４と接続されており、制
御装置４からの信号に応じて、開口方向が変わるように
設定されている。具体的には、各３方向バルブ３１，３
２は、制御装置４から開口信号を受信した場合にのみ、
浴槽水循環管路３０と循環往き管２０又は循環戻り管１
６とを連通させるように開口し、開口解除信号を受信す
ると、浴槽水循環管路３０と循環往き管２０又は循環戻
り管１６との間の連通を解除し、循環往き管２０及び管
路１３ａは浴槽１７と風呂熱交換器１４とを連通させ、
循環戻り管１６は風呂熱交換器１４と浴槽１７とを各々
連通させる。すなわち、排熱回収時は、浴槽１７のお湯
は、管路２０からバルブ３１、管路３０、バルブ３２、
管路１６を通って浴槽１７に戻る。一方、追い焚き時
は、浴槽１７のお湯は、管路２０、バルブ３１、管路１
３ａ、管路１３ｂ、バルブ３２、管路１６を通って浴槽
１７に戻る。The line 13a and the bath water circulation line 30 are connected via a first three-way valve 31, and similarly, the circulation return pipe 16 and the bath water circulation line 30 are connected to each other by a second three-way valve 32. Connected through. These two three-way valves 31 and 32 are each connected to the control device 4, and are set so that the opening direction changes in response to a signal from the control device 4. Specifically, each three-way valve 31, 3
2 only when receiving the opening signal from the control device 4,
Bath water circulation line 30 and circulation outflow pipe 20 or circulation return pipe 1
6 is opened so as to communicate with each other, and when the opening release signal is received, the communication between the bath water circulation pipe 30 and the circulation return pipe 20 or the circulation return pipe 16 is released, and the circulation return pipe 20 and the pipe 13a are released. The bathtub 17 and the bath heat exchanger 14 are communicated with each other,
The circulation return pipe 16 makes the bath heat exchanger 14 and the bathtub 17 communicate with each other. That is, when recovering the exhaust heat, the hot water in the bathtub 17 flows from the conduit 20 to the valve 31, the conduit 30, the valve 32,
Return to the bathtub 17 through the pipe 16. On the other hand, at the time of reheating, the hot water in the bathtub 17 is the pipe 20, the valve 31, and the pipe 1.
It returns to the bathtub 17 through 3a, the conduit 13b, the valve 32, and the conduit 16.
【００１８】さらに、本発明に係る風呂給湯器は、水と
水との間で熱交換を行う水−水熱交換器３３を備えてい
る。この水−水熱交換器３３の内部には、浴槽水循環管
路３０の一部３０ａと、給水接続口２から給湯熱交換器
５に至る管路８の一部８ａとがともに通っており、か
つ、これら二つの管路の一部３０ａ，８ａは極めて隣接
して平行に配置されている。このため、浴槽水循環管路
３０の一部３０ａ内を流れる水と管路８の一部８ａ内を
流れる水との間では相互に熱交換を行うことができるよ
うにされている。Further, the bath water heater according to the present invention comprises a water-water heat exchanger 33 for exchanging heat between water. Inside the water-water heat exchanger 33, a part 30a of the bath water circulation pipe 30 and a part 8a of the pipe 8 from the water supply connection port 2 to the hot water heat exchanger 5 pass together. Moreover, the portions 30a and 8a of these two conduits are arranged very close to each other and in parallel. Therefore, heat exchange can be performed between the water flowing in the part 30a of the bath water circulation pipe 30 and the water flowing in the part 8a of the pipe 8.
【００１９】また、両管路の一部３０ａ，８ａを流れる
水の熱を逃がさないように、両管路３０ａ，８ａの周囲
には、例えば、ウレタン発泡材などの断熱材３４が厚く
巻かれている。Further, a heat insulating material 34 such as a urethane foam material is thickly wound around the pipes 30a and 8a so that the heat of the water flowing through the pipes 30a and 8a is not released. ing.
【００２０】上記以外の構成は図３に示した風呂給湯器
と同様の構成である。この本実施例に係る風呂給湯器は
以下のように作動する。給水接続口２から給湯熱交換器
５に供給され、給湯熱交換器５で加熱された上水を給湯
栓１を介して給湯する場合、給湯熱交換器５で加熱され
た上水をソレノイドバルブ１８、循環ポンプ１２、管路
１３ａ、風呂熱交換器１４及び循環戻り管１６または循
環行き管２０を介して浴槽１７に供給する場合、及び、
循環ポンプ１２により浴槽１７内の湯を風呂熱交換器１
４内に吸引し、風呂熱交換器１４で加熱した後、循環戻
り管１６または循環往き管２０を介して浴槽１７に戻す
場合（すなわち、追いだきを行う場合）には、制御装置
４は、各３方向バルブ３１，３２に開口信号を送ること
なく、循環往き管２０及び管路１３ａは浴槽１７と風呂
熱交換器１４とを、循環戻り管１６は風呂熱交換器１４
と浴槽１７とを各々連通させるようにしておく。The structure other than the above is the same as that of the bath water heater shown in FIG. The bath water heater according to this embodiment operates as follows. When hot water supplied to the hot water supply heat exchanger 5 from the hot water supply connection port 2 and heated by the hot water supply heat exchanger 5 is hot water supplied through the hot water tap 1, the hot water heated by the hot water supply heat exchanger 5 is a solenoid valve. 18, when supplying to the bathtub 17 via the circulation pump 12, the pipe line 13a, the bath heat exchanger 14 and the circulation return pipe 16 or the circulation going pipe 20, and
The hot water in the bathtub 17 is heated by the circulation pump 12 into the bath heat exchanger 1
When sucking into 4 and heating with the bath heat exchanger 14, when returning to the bathtub 17 via the circulation return pipe 16 or the circulation forward pipe 20 (that is, when repulsing), the control device 4 The circulation outflow pipe 20 and the pipe line 13a connect the bath 17 and the bath heat exchanger 14, and the circulation return pipe 16 connects the bath heat exchanger 14 without sending an opening signal to each of the three-way valves 31 and 32.
The bath and the bath 17 are communicated with each other.
【００２１】このようにしておくことによって、図３に
示した風呂給湯器と同様の状態になり、給湯あるいは追
いだきなどのモードを行うことができる。By doing so, the state becomes the same as that of the bath water heater shown in FIG. 3, and it is possible to perform a mode such as hot water supply or recharging.
【００２２】例えば、入浴が終了し、浴槽１７内の湯が
不要になった場合には、入浴者が、リモートコントロー
ル装置などの適当な手段を介して、入浴が終了した旨の
信号を制御装置４に送信する。制御装置４は、この信号
を受信すると、第一３方向バルブ３１及び第二３方向バ
ルブ３２の各々に開口信号を送信する。この開口信号を
受信することにより、第一３方向バルブ３１は排熱回収
用管路３０と循環行き管２０とを連通させるように開口
し、第二３方向バルブ３２は排熱回収用管路３０と循環
戻り管１６とを連通させるように開口する。For example, when the bathing is finished and the hot water in the bathtub 17 is no longer needed, the bather sends a signal indicating that the bathing is finished to the control device through an appropriate means such as a remote control device. Send to 4. Upon receiving this signal, the control device 4 sends an opening signal to each of the first three-way valve 31 and the second three-way valve 32. By receiving the opening signal, the first three-way valve 31 opens so as to connect the exhaust heat recovery pipe 30 and the circulation going pipe 20, and the second three-way valve 32 opens the exhaust heat recovery pipe. An opening is provided so as to connect 30 and the circulation return pipe 16.
【００２３】次いで、制御装置４は、循環ポンプ１２に
作動開始信号を送信し、循環ポンプ１２を作動させる。
この循環ポンプ１２の作動開始により、浴槽１７内の浴
槽水が吸引され、浴槽水は循環行き管２０、循環ポンプ
１２及び第一３方向バルブ３１から排熱回収用管路３
０、循環戻り管１６を経て浴槽１７に戻る経路を流れ
る。Next, the control device 4 sends an operation start signal to the circulation pump 12 to operate the circulation pump 12.
By starting the operation of the circulation pump 12, the bath water in the bath 17 is sucked, and the bath water flows from the circulation going pipe 20, the circulation pump 12 and the first three-way valve 31 to the exhaust heat recovery pipe line 3.
0, flows through the circulation return pipe 16 and returns to the bathtub 17.
【００２４】浴槽水が排熱回収用管路３０の一部３０ａ
を流れるとき、この排熱回収用管路３０の一部３０ａと
管路８の一部８ａとは水−水熱交換器３３を介して水−
水熱交換の関係にあるため、浴槽水の熱量が管路８を流
れる上水に移行する。このため、管路８の一部８ａ内に
ある上水の水温は上昇し、この水温が上昇した上水は、
給湯栓１が開かれると、上水の直圧により給湯熱交換器
５に導かれ、再度加熱されたうえで給湯栓１から給湯さ
れる。The bath water is a part 30a of the exhaust heat recovery pipe 30.
Of the exhaust heat recovery pipe 30 and the pipe 8 through the water-water heat exchanger 33.
Due to the water heat exchange relationship, the heat quantity of the bath water is transferred to the clean water flowing through the pipe 8. Therefore, the water temperature of the clean water in the part 8a of the pipeline 8 rises, and the clean water whose temperature has risen is
When the hot water tap 1 is opened, it is guided to the hot water heat exchanger 5 by the direct pressure of tap water, heated again, and then hot water is supplied from the hot water tap 1.
【００２５】一方、排熱を回収された浴槽水は水温が低
下した状態で、第二３方向バルブ３２及び循環戻り管１
６を経て浴槽１７に戻る。このように、本実施例に係る
風呂給湯器により、浴槽内の残り湯の排熱を上水に移行
させ、上水の水温を上げることができ、残り湯の排熱の
有効利用が可能になる。On the other hand, the bath water from which exhaust heat has been recovered has the water temperature lowered and the second three-way valve 32 and the circulation return pipe 1
Return to bath 17 via 6. Thus, with the bath water heater according to the present embodiment, the exhaust heat of the remaining hot water in the bathtub can be transferred to the tap water, and the water temperature of the tap water can be raised, and the exhaust heat of the remaining hot water can be effectively used. Become.
【００２６】図２は本発明に係る給湯方法のフローチャ
ートである。制御装置４は、入浴者から給湯開始信号を
受信すると、ソレノイドバルブ１８を開き、給湯熱交換
器５において加熱された温水が給水管路８、管路１９、
ソレノイドバルブ１８、循環ポンプ１２、管路１３ａ、
風呂熱交換器１４及び循環戻り管１６を経る経路と循環
往き管２０を経る経路の両経路またはどちらか一方の経
路を経て浴槽１７に給湯される。給湯量が設定値に達す
ると、制御装置４はソレノイドバルブ１８を閉じ、浴槽
１７への給湯を停止させる。その後、浴槽１７内乃湯温
が設定温度に達するまで追い焚きを行う。FIG. 2 is a flow chart of the hot water supply method according to the present invention. When the controller 4 receives the hot water supply start signal from the bather, the controller 4 opens the solenoid valve 18 so that the hot water heated in the hot water heat exchanger 5 supplies the water supply pipe line 8, the pipe line 19,
Solenoid valve 18, circulation pump 12, pipeline 13a,
Hot water is supplied to the bathtub 17 through a route passing through the bath heat exchanger 14 and the circulation return pipe 16 and a route passing through the circulation forward pipe 20, or either one of the routes. When the hot water supply amount reaches the set value, the control device 4 closes the solenoid valve 18 to stop hot water supply to the bathtub 17. After that, additional heating is performed until the temperature of the bathtub 17 reaches the set temperature.
【００２７】浴槽１７内の追い焚き時には、制御装置４
はソレノイドバルブ１１、１８を閉じ、循環ポンプ１２
を作動させる。これによって浴槽１７内の温水は循環往
き管２０、循環ポンプ１２及び管路１３ａを経て、風呂
熱交換器１４に流入する。温水が風呂熱交換器１４に流
入したと同時に、制御装置４は風呂熱交換器１４の下方
に配置されたファン２１に作動開始信号を送り、ファン
２１の作動を開始させる。ファン２１が作動することに
より、燃焼用空気が給湯バーナ１５に送られる。制御装
置４はファン回転検知装置（図示せず）によりファン作
動を確認した後、イグナイター７ａに着火信号を送り、
風呂熱交換器１４の風呂バーナ１５を着火させ、風呂熱
交換器１４に流入した温水を加熱する。このようにして
加熱された温水は、循環戻り管１６を経て、浴槽１７に
戻される。また、風呂バーナ１５の燃焼により発生した
排気ガスはファン２１の送風により、風呂熱交換器１４
内から排気口２２を経て、外部に放出される。（ステッ
プ１）。At the time of reheating in the bathtub 17, the control device 4
Closed the solenoid valves 11 and 18, and the circulation pump 12
Operate. As a result, the hot water in the bath 17 flows into the bath heat exchanger 14 via the circulation outflow pipe 20, the circulation pump 12 and the pipe line 13a. At the same time when the hot water flows into the bath heat exchanger 14, the control device 4 sends an operation start signal to the fan 21 arranged below the bath heat exchanger 14 to start the operation of the fan 21. By operating the fan 21, the combustion air is sent to the hot water supply burner 15. After confirming the fan operation by the fan rotation detection device (not shown), the control device 4 sends an ignition signal to the igniter 7a,
The bath burner 15 of the bath heat exchanger 14 is ignited to heat the hot water flowing into the bath heat exchanger 14. The hot water heated in this way is returned to the bath 17 via the circulation return pipe 16. Further, the exhaust gas generated by the combustion of the bath burner 15 is blown by the fan 21 so that the bath heat exchanger 14
It is released from the inside through the exhaust port 22. (Step 1).
【００２８】その後、入浴者が制御装置４に対して入浴
終了を知らせる信号を発信すると（ステップ２）、制御
装置４は第一３方向バルブ３１及び第二３方向バルブ３
２に対して開口信号を発信する。この開口信号により、
第一３方向バルブ３１及び第二３方向バルブ３２は排熱
回収用管路３０を循環往き管及び循環戻り管１６に各々
連通させるように開口する（ステップ３）。After that, when the bather sends a signal to the control device 4 to inform the end of bathing (step 2), the control device 4 causes the first three-way valve 31 and the second three-way valve 3 to operate.
An opening signal is transmitted to 2. With this opening signal,
The first three-way valve 31 and the second three-way valve 32 are opened so that the exhaust heat recovery pipe 30 communicates with the circulation forward pipe and the circulation return pipe 16, respectively (step 3).
【００２９】次いで、制御装置４は循環ポンプ１２に作
動開始信号を発し、循環ポンプ１２を作動させる（ステ
ップ４）。循環ポンプ１２の作動により、浴槽１７内の
浴槽水は循環行き管２０、循環ポンプ１２、第一３方向
バルブ３１、を経て排熱回収用管路３０に流れ込む。排
熱回収用管路３０に流れ込んだ浴槽水は水−水熱交換器
３３において管路８内を流れる上水との間で熱交換を行
う。この熱交換により、上水は加熱され、浴槽水の水温
は低下する（ステップ５）。この熱交換の後、浴槽水は
浴槽１７に戻る。一方、加熱された上水は給湯栓１を経
て給湯される（ステップ６）。Next, the control device 4 issues an operation start signal to the circulation pump 12 to operate the circulation pump 12 (step 4). By the operation of the circulation pump 12, the bath water in the bath 17 flows into the exhaust heat recovery pipeline 30 via the circulation pipe 20, the circulation pump 12, and the first three-way valve 31. The bath water flowing into the exhaust heat recovery pipe 30 exchanges heat with the tap water flowing in the pipe 8 in the water-water heat exchanger 33. By this heat exchange, the clean water is heated and the water temperature of the bath water is lowered (step 5). After this heat exchange, the bath water returns to bath 17. On the other hand, the heated tap water is supplied through the hot water tap 1 (step 6).
【００３０】[0030]
【発明の効果】以上のように、本発明に係る風呂給湯器
及び給湯方法によれば、従来そのまま棄てられることが
多かった浴槽の残り湯から排熱を回収し、その排熱によ
り上水を加熱することができる。As described above, according to the bath water heater and the hot water supply method of the present invention, exhaust heat is recovered from the remaining hot water in the bathtub, which is often discarded as it is, and tap water is supplied by the exhaust heat. It can be heated.
【００３１】このように、浴槽の残り湯の排熱を利用し
て上水を予めある程度加熱しておくことにより、給湯熱
交換器の負荷を減少させることができ、ひいては、給湯
熱交換器の長寿命化及び使用ガス量の削減を図ることが
できる。As described above, by preliminarily heating the clean water to some extent by utilizing the waste heat of the hot water remaining in the bathtub, the load of the hot water supply heat exchanger can be reduced, and by extension, the hot water supply heat exchanger It is possible to extend the life and reduce the amount of gas used.
【図１】本発明に係る風呂給湯器の一実施例の概略図で
ある。FIG. 1 is a schematic view of an embodiment of a bath water heater according to the present invention.
【図２】本発明に係る給湯方法のフローチャートであ
る。FIG. 2 is a flowchart of a hot water supply method according to the present invention.
【図３】従来の風呂給湯器の一例の概略図である。FIG. 3 is a schematic view of an example of a conventional bath water heater.
１ 給湯栓 ２ 給水接続口 ４ 制御装置 ５ 給湯熱交換器 ６ ガス供給電磁弁 ７ 給湯バーナー
ー ８ 管路 ９，２１ ファン １１，１８ ソレノイドバルブ １２ 循環ポンプ １４ 風呂熱交換器 １５ 風呂バーナ
ー １６ 循環戻り管 １７ 浴槽 ２０ 循環行き管 ２３ 脱水栓 ３０ 排熱回収用管路 ３１ 第一３方向
バルブ ３２ 第二３方向バルブ ３３ 水−水熱交
換器 ３４ 断熱材1 Hot Water Tap 2 Water Supply Connection Port 4 Control Device 5 Hot Water Heat Exchanger 6 Gas Supply Solenoid Valve 7 Hot Water Supply Burner 8 Pipeline 9,21 Fan 11,18 Solenoid Valve 12 Circulation Pump 14 Bath Heat Exchanger 15 Bath Burner 16 Circulation Return Pipe 17 Bathtub 20 Circulation pipe 23 Dehydration stopper 30 Exhaust heat recovery pipe 31 First three-way valve 32 Second three-way valve 33 Water-water heat exchanger 34 Heat insulating material
Claims (2)
を供給する給湯熱交換器と、浴槽水を再加熱して、浴槽
に戻す風呂熱交換器とを備える風呂給湯器において、 前記給湯熱交換器に向かう上水が通る給水管路に設けら
れている水−水熱交換器と、 前記浴槽と前記水−水熱交換器との間を循環する排熱回
収用管路と、 前記浴槽と前記風呂熱交換器との間を循環する浴槽水循
環管路と前記排熱回収用管路とを切り換え、前記浴槽と
前記風呂熱交換器及び前記水−水熱交換器の何れかとを
連通させる管路切り換え手段と、 を備えることを特徴とする排熱回収機能付き風呂給湯
器。1. A bath water heater comprising a hot water supply heat exchanger for heating clean water and supplying heated clean water via a hot water tap, and a bath heat exchanger for reheating bath water and returning it to the bath. A water-water heat exchanger provided in a water supply line through which clean water to the hot water supply heat exchanger passes, and an exhaust heat recovery line circulating between the bath and the water-water heat exchanger And, switching between the bath water circulation pipeline circulating between the bath and the bath heat exchanger and the exhaust heat recovery pipeline, any of the bath, the bath heat exchanger and the water-water heat exchanger. A bath water heater with an exhaust heat recovery function, comprising: a conduit switching means for communicating the heels.
循環管路内において循環させる過程と、 前記循環管路内の任意の地点において前記残り湯と前記
循環管路とは別の管路を通る上水との間で熱交換を行う
過程と、 前記上水を給湯栓を介して給湯する過程と、 を備えることを特徴とする排熱を回収して給湯を行う方
法。2. A process of circulating the remaining hot water in the bathtub in a circulation pipe communicating with the bath, and the remaining hot water and the circulation pipe are separated from each other at an arbitrary point in the circulation pipe. A method of recovering waste heat and supplying hot water, comprising: a step of exchanging heat with the clean water passing through a pipeline; and a step of supplying the clean water with a hot water tap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33773394A JPH08178428A (en) | 1994-12-28 | 1994-12-28 | Bath water heater with exhaust heat recovery function and method for recovering exhaust heat and supplying hot water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33773394A JPH08178428A (en) | 1994-12-28 | 1994-12-28 | Bath water heater with exhaust heat recovery function and method for recovering exhaust heat and supplying hot water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08178428A true JPH08178428A (en) | 1996-07-12 |
Family
ID=18311454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33773394A Pending JPH08178428A (en) | 1994-12-28 | 1994-12-28 | Bath water heater with exhaust heat recovery function and method for recovering exhaust heat and supplying hot water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08178428A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011149592A (en) * | 2010-01-20 | 2011-08-04 | Paloma Co Ltd | Water heater |
-
1994
- 1994-12-28 JP JP33773394A patent/JPH08178428A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011149592A (en) * | 2010-01-20 | 2011-08-04 | Paloma Co Ltd | Water heater |
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