JP4206875B2

JP4206875B2 - Hot water storage water heater

Info

Publication number: JP4206875B2
Application number: JP2003316354A
Authority: JP
Inventors: 順一服部
Original assignee: Panasonic Corp; Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Corp; Panasonic Holdings Corp
Priority date: 2003-09-09
Filing date: 2003-09-09
Publication date: 2009-01-14
Anticipated expiration: 2023-09-09
Also published as: JP2005083658A

Description

本発明は、風呂浴槽の湯水を追い焚きする機能を有した追い焚き機能付き貯湯式給湯器に関するものである。 The present invention relates to a hot water storage type water heater with a reheating function having a function of reheating hot water in a bath tub.

従来この種の貯湯式給湯器は、電気ヒータを風呂循環路に設け浴槽湯水の追い焚きを行うのが一般的であった。近年、安価な深夜電力で沸かしたお湯の熱量を有効に使って浴槽湯水の保温・追いだきを行うことができるものが提案されてきている（例えば、特開文献１参照）。 Conventionally, this type of hot water storage type water heater is generally provided with an electric heater in a bath circulation path to replenish bathtub hot water. In recent years, it has been proposed to use hot water boiled with inexpensive late-night power to effectively retain and chase bathtub hot water (see, for example, Japanese Patent Application Laid-Open No. H10-228707).

図４は、前記公報に記載された従来の貯湯式給湯器を示すものである。図４において１は湯水を貯湯するタンク、２はタンク１の上部に設けた上部ヒータ、３はタンク１の下部に設けた下部ヒータ、４はタンク１の上部に設けた熱交換器、５は風呂循環路、６はタンク１の胴部に設けたタンク温度検出部、７は浴槽湯水を循環させる風呂循環ポンプである。 FIG. 4 shows a conventional hot water storage type water heater described in the publication. In FIG. 4, 1 is a tank for storing hot water, 2 is an upper heater provided at the upper part of the tank 1, 3 is a lower heater provided at the lower part of the tank 1, 4 is a heat exchanger provided at the upper part of the tank 1, and 5 is A bath circulation path, 6 is a tank temperature detection unit provided in the body of the tank 1, and 7 is a bath circulation pump for circulating bath water.

この貯湯式給湯器において、まず風呂循環ポンプ７が駆動することで浴槽８の湯水が風呂循環路５を通り熱交換器４に供給される。熱交換器４に供給された湯水は、タンク１内に貯湯されている高温のお湯と熱交換によって加熱され、再び浴槽８に戻されることで浴槽湯水の保温・追いだきが行われる。そして、熱交換によってタンク１に貯湯されているお湯の温度が、予め定められた沸き上げ開始温度まで低下してきたことをタンク温度検出部６が検出すると、必要に応じて上部ヒータ２又は下部ヒータ３に通電し、タンク１内の湯水温度を上昇させ熱交換を継続して行うようになっていた。
特開２００２−４８４１４号公報（図４） In this hot water storage type water heater, first, the bath circulation pump 7 is driven to supply hot water in the bathtub 8 to the heat exchanger 4 through the bath circulation path 5. The hot water supplied to the heat exchanger 4 is heated by heat exchange with hot hot water stored in the tank 1 and is returned to the bathtub 8 so that the hot water in the bathtub is kept warm. When the tank temperature detection unit 6 detects that the temperature of the hot water stored in the tank 1 has decreased to a predetermined boiling start temperature by heat exchange, the upper heater 2 or the lower heater is used as necessary. 3 was energized, and the hot water temperature in the tank 1 was raised to continue the heat exchange.
JP 2002-48414 A (FIG. 4)

しかしなが上記従来の構成では、熱交換によってタンク内の湯水温度が低下してきて、熱交換に必要な熱量が足りなくなったときに上部ヒータのみ通電した場合は、上部ヒータより上のタンク領域しか湯水温度を上昇させることができない。よって、事前に確保できる熱量は上部ヒータより上のタンク領域のみと少なく、急に連続して追いだきが必要になった場合やカランからの給湯などで熱量不足になるという課題があった。 However, in the conventional configuration described above, when the hot water temperature in the tank decreases due to heat exchange, and only the upper heater is energized when the amount of heat necessary for heat exchange is insufficient, only the tank area above the upper heater is used. The hot water temperature cannot be raised. Therefore, the amount of heat that can be secured in advance is small only in the tank region above the upper heater, and there has been a problem that the amount of heat becomes insufficient when suddenly it is necessary to continuously follow up or when hot water is supplied from Karan.

また、上部ヒータ及び下部ヒータを同時に通電した場合は、タンク全量を沸き上げることになり、一般的に電気料金の高価な昼間時間帯に無駄な電力を使ってしまうという課題があった。 Further, when the upper heater and the lower heater are energized at the same time, the entire amount of the tank is boiled, and there is a problem that wasteful power is generally used in the daytime hours when electricity charges are expensive.

本発明は上記従来の課題を解決するもので、保温・追い焚き時に熱量不足が発生した場合に、より効果的にタンク内の湯水の沸き上げを行う貯湯式給湯器を提供することを目的としている。 The present invention solves the above-described conventional problems, and an object thereof is to provide a hot water storage type water heater that more effectively boils hot water in a tank when a shortage of heat occurs during heat insulation and reheating. Yes.

上記目的を達成するため本発明の貯湯式給湯器は、浴槽湯水の追い焚き、保温中にタンク内の熱交換に必要な熱量が不足してきたときは、沸き上げ循環ポンプを停止したままヒータへの通電を行うことで、熱交換に必要なタンク上部領域のみの沸き上げを行う方式と、浴槽湯水の保温・追い焚きが終了した後に、タンク上部領域の沸き上げが終了した後も沸き上げ循環ポンプを駆動し、ヒータへの通電を行う方式を併用した沸き上げ制御を行うようにしたものである。 In order to achieve the above-mentioned object, the hot water storage type hot water heater of the present invention is used for reheating bath water, and when the amount of heat necessary for heat exchange in the tank becomes insufficient during heat insulation, the heating circulation pump is stopped and the heater is stopped. The system that heats only the upper area of the tank necessary for heat exchange and heats up and reheats the bath water, and after the boiling of the upper area of the tank is finished It is designed to perform boiling control using a method of driving a pump and energizing a heater.

上記発明によれば、浴槽湯水の保温・追い焚き中はタンク上部のみを沸き上げ、追い焚きが終了した後に沸き上げ循環ポンプを駆動して積層沸き上げを行うことで、浴槽湯水の保温・追い焚き及びカランからの給湯に必要な熱量を確保することができる。 According to the above-described invention, only the upper part of the tank is boiled during the warming and reheating of the bathtub hot water, and after the reheating is finished, the boiling circulation pump is driven to perform the stacked boiling, thereby keeping the hot and cold bath water. It is possible to secure the amount of heat necessary for hot water supply from firewood and currant.

以上のように本発明によれば、沸き上げポンプを停止させてヒータで加熱する第１の沸き上げ動作と、沸き上げポンプとヒータを駆動して行う第２の沸き上げ動作を組み合わせた沸き上げ制御により、タンク内の湯水との熱交換により、浴槽の湯水の保温・追い焚きを行っているときに、タンク内の熱量が不足した場合、その熱量を補うためのタンクの沸き上げに対し、不必要なヒータへの通電によりランニングコストが高くなることを望まない使用者に対しては、タンク内の湯水の沸き上げをタンク上部領域のみに規制することができ、必要熱量のみの沸き上げで終了させることができる。また、使用者が次回の保温・追い焚きや、カランからの給湯を予測して、十分な熱量が必要と判断したとき、予め余分に確保しておくことができる。 As described above, according to the present invention, the first boiling operation in which the boiling pump is stopped and heated by the heater and the second boiling operation in which the boiling pump and the heater are driven are combined. By controlling the heat exchange with the hot water in the tank by control, if the amount of heat in the tank is insufficient when the hot water in the bathtub is kept warm, reheating the tank to make up for the heat, For users who do not want the running cost to be increased due to unnecessary energization of the heater, the boiling of hot water in the tank can be restricted only to the upper area of the tank, and only the necessary amount of heat can be raised. Can be terminated. In addition, when the user predicts the next heat insulation and chasing and hot water supply from the currant and determines that a sufficient amount of heat is necessary, an extra amount can be secured in advance.

第１の発明は貯湯タンクと、前記貯湯タンクの上部に設けたヒータと、前記貯湯タンクの下部と上部を接続して形成した沸き上げ循環路と、前記沸き上げ循環路に湯水を供給する沸き上げ循環ポンプと、前記貯湯タンクの上部に設けた熱交換器と、前記熱交換器を介して浴槽水を循環させる風呂循環路と、前記風呂循環路に浴槽水を循環させる風呂循環ポンプと、前記風呂循環路の浴槽水温度を検出する風呂温度検出部と、前記貯湯タンクの上部の湯水温度を検出する上部タンク温度検出部と、前記上部タンク温度検出部よりも下方に下部タンク温度検出部を備え、前記熱交換器による浴槽水の追い焚き時には、前記風呂循環ポンプを駆動し、前記風呂温度検出部が予め定めた風呂設定温度Ａ１を検出するまで加熱するとともに、追い焚き動作の途中で前記上部タンク温度検出部が予め定めた沸き上げ開始温度Ａ２を検出すると、前記ヒータへの通電を開始するとともに、前記上部タンク温度検出部が沸き上げ終了温度Ａ３を検出するまで前記沸き上げ循環ポンプを駆動しない第１の沸き上げ動作を行い、浴槽水の追い焚き動作が完了後、沸き上げポンプを駆動させながらヒータで加熱する第２の沸き上げ動作を開始し、前記下部タンク温度検出部が予め定めた沸き上げ終了温度Ａ４を検出すると、第２の沸き上げ動作を終了することを特徴とするものであり、沸き上げ循環ポンプを停止したままヒータへの通電を行うことで、タンク上部領域のみの沸き上げを素早く行えるようになり、熱交換によってタンク内の熱交換に必要な熱量が不足してきたことを補うことができる。 A first invention is a hot water storage tank, a heater provided at an upper portion of the hot water storage tank, a boiling circulation path formed by connecting a lower portion and an upper portion of the hot water storage tank, and a boiling point for supplying hot water to the boiling circulation path. A circulation pump, a heat exchanger provided in an upper part of the hot water storage tank, a bath circulation path for circulating bath water through the heat exchanger, a bath circulation pump for circulating bath water in the bath circulation path, A bath temperature detecting unit for detecting a bath water temperature of the bath circulation path, an upper tank temperature detecting unit for detecting a hot water temperature in an upper part of the hot water storage tank, and a lower tank temperature detecting unit below the upper tank temperature detecting unit; And when the bath water is reheated by the heat exchanger, the bath circulation pump is driven and heated until the bath temperature detecting unit detects a predetermined bath set temperature A1, and the reheating operation is performed. When the upper tank temperature detecting section in the middle of detecting the start temperature A2 boiling predetermined, starts the current supply to the heater, the water heating to the detection of the finishing temperature A3 boiling said upper tank temperature detecting section The first boiling operation is performed without driving the raising circulation pump, and after the reheating operation of the bath water is completed, the second boiling operation for heating with the heater while driving the boiling pump is started, and the temperature of the lower tank is increased. When the detection unit detects a predetermined boiling end temperature A4, the second boiling operation is terminated, and by energizing the heater while the boiling circulation pump is stopped, It becomes possible to quickly boil only the upper region of the tank, and it is possible to compensate for the shortage of heat necessary for heat exchange in the tank by heat exchange.

さらに、予めタンク内に適量の熱量を確保させておくこととなり、急に連続して浴槽湯水の保温・追いだきが必要になった場合やカランからの給湯などでの熱量不足を想定して、ある程度の熱量を予め余分に確保しておくことができる。 In addition, an appropriate amount of heat will be secured in advance in the tank, assuming that there is a sudden shortage of hot water in the bathtub and hot water, and that there is a shortage of heat in hot water from Karan, An extra amount of heat can be secured in advance.

第２の発明は貯湯タンクと、前記貯湯タンクの上部に設けたヒータと、前記貯湯タンクの下部と上部を接続して形成した沸き上げ循環路と、前記沸き上げ循環路に湯水を供給する沸き上げ循環ポンプと、前記貯湯タンクの上部に設けた熱交換器と、前記熱交換器を介
して浴槽水を循環させる風呂循環路と、前記風呂循環路に浴槽水を循環させる風呂循環ポンプと、前記風呂循環路の浴槽水温度を検出する風呂温度検出部と、前記貯湯タンクの上部の湯水温度を検出する上部タンク温度検出部と、前記上部タンク温度検出部よりも下方に下部タンク温度検出部を備え、前記熱交換器による浴槽水の追い焚き時には、前記風呂循環ポンプを駆動し、前記風呂温度検出部が予め定めた風呂設定温度Ａ１を検出するまで加熱するとともに、追い焚き動作の途中で前記上部タンク温度検出部が予め定めた沸き上げ開始温度Ａ２を検出すると、前記ヒータへの通電を開始するとともに、前記上部タンク温度検出部が沸き上げ終了温度Ａ３を検出するまで前記沸き上げ循環ポンプを駆動しない第１の沸き上げ動作を行い、浴槽水の追い焚き動作が完了後、沸き上げポンプを駆動させながらヒータで加熱する第２の沸き上げ動作を開始し、浴槽水の追い焚き動作が完了した時から予め定めた所定時間Ｂ２が経過すると、第２の沸き上げ動作を終了することを特徴とするものであり、沸き上げ循環ポンプを停止したままヒータへの通電を行うことで、タンク上部領域のみの沸き上げを素早く行えるようになり、熱交換によってタンク内の熱交換に必要な熱量が不足してきたことを補うことができる。 According to a second aspect of the present invention, there is provided a hot water storage tank, a heater provided at an upper portion of the hot water storage tank, a boiling circulation path formed by connecting a lower portion and an upper portion of the hot water storage tank, and boiling for supplying hot water to the boiling circulation path. A circulation pump, a heat exchanger provided in an upper part of the hot water storage tank, a bath circulation path for circulating bath water through the heat exchanger, a bath circulation pump for circulating bath water in the bath circulation path, A bath temperature detecting unit for detecting a bath water temperature of the bath circulation path, an upper tank temperature detecting unit for detecting a hot water temperature in an upper part of the hot water storage tank, and a lower tank temperature detecting unit below the upper tank temperature detecting unit; And when the bath water is reheated by the heat exchanger, the bath circulation pump is driven and heated until the bath temperature detecting unit detects a predetermined bath set temperature A1, and the reheating operation is performed. When the upper tank temperature detecting section in the middle of detecting the start temperature A2 boiling predetermined, starts the current supply to the heater, the water heating to the detection of the finishing temperature A3 boiling said upper tank temperature detecting section The first boiling operation without driving the raising circulation pump is performed, and after the bath water replenishment operation is completed, the second boiling operation in which the heater is heated while driving the boiling pump is started, and the bath water replenishment is started. The second boiling operation is terminated when a predetermined time B2 elapses from the completion of the firing operation , and the heater is energized while the boiling circulation pump is stopped. Thus, it becomes possible to quickly boil only the upper region of the tank, and it is possible to compensate for the shortage of heat necessary for heat exchange in the tank by heat exchange.

さらに、予めタンク内に適量の熱量を確保させておくこととなり、急に連続して浴槽湯水の保温・追いだきが必要になった場合やカランからの給湯などでの熱量不足を想定して、ある程度の熱量を予め余分に確保しておくことができる。 In addition, an appropriate amount of heat will be secured in advance in the tank, assuming that there is a shortage of heat in hot water from the hot water from Karan, etc. An extra amount of heat can be secured in advance.

（実施の形態１）
図１は本発明の本発明の実施の形態における貯湯式給湯器の構成を示す模式図、図２は同実施例の通常の沸き上げ手段の動作を示したフローチャートである。 (Embodiment 1)
FIG. 1 is a schematic diagram showing a configuration of a hot water storage type water heater in an embodiment of the present invention, and FIG. 2 is a flowchart showing an operation of a normal boiling means of the same example.

図１において１０は湯水を貯湯するタンク、１１はタンク１０の上部に設けたヒータ、１２はタンク１０の下部と上部を接続する沸き上げ循環路、１３は沸き上げ循環路１２の途中に介在しタンク１０の下部の湯水を上部に循環させる沸き上げ循環ポンプ、１４はタンク１０の上部に設けた熱交換器、１５は熱交換器１４を介して浴槽１６の湯水を循環させる風呂循環路、１７は風呂循環路１５に介在し浴槽１６の湯水を循環させる風呂循環ポンプ、１８は熱交換器１４に対し１次側の風呂循環路１５に介在し浴槽１６の湯水温度を検出する風呂温度検出部、１９はヒータ１１より上部のタンク１０領域内の湯水温度を検出するため、タンク１０胴部に設けた上部タンク温度検出部、２０はタンク１０上部に設けられた沸き上げ温度検出部、２１は上部タンク温度検出部１９より下のタンク１０胴部に設けられた下部タンク温度検出部である。 In FIG. 1, 10 is a tank for storing hot water, 11 is a heater provided in the upper part of the tank 10, 12 is a heating circuit connecting the lower and upper parts of the tank 10, and 13 is interposed in the middle of the heating circuit 12. A boiling circulation pump for circulating hot water in the lower part of the tank 10 to the upper part, 14 a heat exchanger provided in the upper part of the tank 10, 15 a bath circulation path for circulating hot water in the bathtub 16 through the heat exchanger 14, 17 Is a bath circulation pump that circulates in the bath circulation path 15 and circulates hot water in the bathtub 16, and 18 is a bath temperature detection unit that is interposed in the bath circulation path 15 on the primary side with respect to the heat exchanger 14 and detects the hot water temperature in the bathtub 16. , 19 is an upper tank temperature detector provided in the body of the tank 10 for detecting the hot water temperature in the tank 10 region above the heater 11, and 20 is a boiling temperature detector provided in the upper part of the tank 10, 1 is a lower tank temperature detecting element placed in the tank 10 barrel below the upper tank temperature detecting section 19.

以上のように構成された貯湯式給湯器について、図２を用いて通常の夜間における、タンク１０内の湯水の沸き上げについて説明する。まず沸き上げ循環ポンプ１３を停止したまま、ヒータ１１に通電して、ヒータ１１より上部のタンク１０領域を沸き上げる（Ｓ００１）。このときの沸き上げでは、ヒータ１１上部の湯水は対流により均等に上昇していき、沸き上げ温度検出部２０が所定温度Ａ１０を検出するまで行う（Ｓ００２）。そして、沸き上げ温度検出部２０が予め定められた所定温度Ａ１０を検出すると、ヒータ１１の通電と共に沸き上げ循環ポンプ１３が駆動され、タンク１０下部の湯水が沸き上げ循環路１２を通り、タンク１０上部へと供給される（Ｓ００３）。タンク１０上部へと供給された湯水は、沸き上げ温度検出部２０が所定温度Ａ１１を検出するまで、ヒータ１１により沸き上げられた湯水と拡散しながら混合される（Ｓ００４）。そして、沸き上げ温度検出部２０が予め定められた所定温度Ａ１１を検出すると、沸き上げ循環ポンプ１３が停止され、タンク１０下部からの湯水の供給は停止する（Ｓ００５）。沸き上げ循環ポンプ１３が停止することで、再びヒータ１１通電のみの対流沸き上げを、再び沸き上げ温度検出部２０が所定温度Ａ１０を検出するまで行う（Ｓ００２）。 With respect to the hot water storage type water heater configured as described above, boiling water in the tank 10 at normal night will be described with reference to FIG. First, the heater 11 is energized while the boiling circulation pump 13 is stopped, and the tank 10 area above the heater 11 is heated (S001). In boiling at this time, the hot water in the upper part of the heater 11 rises evenly by convection until the boiling temperature detector 20 detects the predetermined temperature A10 (S002). When the boiling temperature detecting unit 20 detects a predetermined temperature A10, the heater 11 is energized, the boiling circulation pump 13 is driven, and the hot water in the lower portion of the tank 10 passes through the boiling circulation path 12 and passes through the tank 10. It is supplied to the upper part (S003). The hot water supplied to the upper part of the tank 10 is mixed while being diffused with the hot water heated by the heater 11 until the boiling temperature detection unit 20 detects the predetermined temperature A11 (S004). When the boiling temperature detection unit 20 detects a predetermined temperature A11, the boiling circulation pump 13 is stopped and the supply of hot water from the bottom of the tank 10 is stopped (S005). When the boiling circulation pump 13 is stopped, the convection boiling with only the heater 11 energized is performed again until the boiling temperature detection unit 20 detects the predetermined temperature A10 again (S002).

このように、沸き上げ循環ポンプ１３の駆動・停止を繰り返すことで、タンク１０の上
部領域から下部領域に向けてお湯が貯湯されていき、安価な深夜電力を利用してタンク１０全量を沸き上げていくことができる。 In this way, by repeatedly driving and stopping the boiling circulation pump 13, hot water is stored from the upper region to the lower region of the tank 10, and the entire amount of the tank 10 is boiled using inexpensive late-night power. Can continue.

次に浴槽１６の湯水の保温・追いだきのときのタンク１０内の湯水の沸き上げについて説明する。まず風呂循環ポンプ１７が駆動し、浴槽１６の湯水が風呂循環路１５を通り、タンク１０上部に設けた熱交換器１４へと供給される。そして、熱交換器１４へと供給された湯水は、タンク１０に貯湯されている安価な深夜電力によって沸き上げられた湯水と熱交換されることで加熱される。加熱された浴槽１６の湯水は、再び風呂循環路１５を通り浴槽１６へと戻される。このように浴槽１６の湯水は、タンク１０に貯湯されている湯水と熱交換されることで、徐々に温度上昇していく。そして、風呂温度検出部１８が予め定められた風呂設定温度Ａ１に達したことを検出すると、風呂循環ポンプ１７は停止し、浴槽１６の湯水の保温・追いだきは終了する。 Next, boiling water in the tank 10 at the time of warming and chasing the hot water in the bathtub 16 will be described. First, the bath circulation pump 17 is driven, and hot water in the bathtub 16 passes through the bath circulation path 15 and is supplied to the heat exchanger 14 provided in the upper part of the tank 10. The hot water supplied to the heat exchanger 14 is heated by exchanging heat with the hot water boiled by cheap midnight power stored in the tank 10. The hot water in the heated bathtub 16 is returned to the bathtub 16 through the bath circuit 15 again. As described above, the temperature of the hot water in the bathtub 16 is gradually increased by heat exchange with the hot water stored in the tank 10. When the bath temperature detector 18 detects that the predetermined bath set temperature A1 has been reached, the bath circulation pump 17 is stopped, and the hot water warming and chasing of the bathtub 16 are terminated.

一方、保温・追いだきで熱交換器１４に熱を奪われたタンク１０内の湯水は、熱交換によって冷やされることで熱交換器１４より下方に下降し、対流しながら混ざりあう。従って、図３の保温・追いだき終了後のように、タンク１０内の湯水は均等に温度低下していく。熱交換によってタンクに貯湯されている湯水温度が低下してくると、やがて熱量が不足し、保温・追いだきが行えなくなってくる。そのため、上部タンク温度検出部１９が予め定められた沸き上げ開始温度Ａ２まで、タンク１０内の湯水温度が低下してきたことを検出すると、ヒータ１１に通電することで、タンク１０内の湯水温度を上昇させ熱交換を継続して行うようになっている。このとき、沸き上げ循環ポンプ１３は停止させ、ヒータ１１のみを通電させることで、ヒータ１１より上部のタンク１０領域のみを沸き上げる第１の沸き上げ動作を行う。 On the other hand, the hot water in the tank 10 that has been deprived of heat by the heat exchanger 14 due to heat insulation and chasing is lowered by the heat exchange and is lowered below the heat exchanger 14 and mixed while convection. Accordingly, the temperature of the hot water in the tank 10 decreases evenly as after the end of the heat insulation and chasing in FIG. If the temperature of hot water stored in the tank drops due to heat exchange, the amount of heat will eventually become insufficient, and heat insulation and chasing will not be possible. Therefore, when the upper tank temperature detection unit 19 detects that the hot water temperature in the tank 10 has decreased to a predetermined boiling start temperature A2, the heater 11 is energized, whereby the hot water temperature in the tank 10 is set. It is raised and heat exchange continues. At this time, the boiling circulation pump 13 is stopped, and only the heater 11 is energized to perform a first boiling operation for boiling only the tank 10 region above the heater 11.

そして、保温・追いだきに必要な熱量を補うためのタンク１０の第１の沸き上げ動作において、その沸き上げ動作の第１の終了条件を、上部タンク温度検出部１９が予め定められた沸き上げ終了温度Ａ３に達したことを検出したときとしている。この条件のときに、ヒータ１１への通電を停止することで、タンク１０の沸き上げが終了される。これにより、保温・追いだきが終了した後もヒータ１１の通電を継続し、タンク１０上部領域に次回の保温・追いだき及びカランからの給湯に必要な熱量を確保しつつ、湯水の沸き上げをタンク１０上部領域のみに規制することになり、不必要なヒータ１１への通電によりランニングコストが高くなることを望まない使用者に対しては、必要熱量のみの沸き上げで終了させることができる。 Then, in the first boiling operation of the tank 10 for supplementing the amount of heat necessary for heat insulation and chasing, the upper tank temperature detection unit 19 sets a predetermined boiling condition as the first end condition of the boiling operation. It is assumed that the end temperature A3 has been reached. Under this condition, the heating of the tank 10 is finished by stopping the energization of the heater 11. As a result, the heater 11 continues to be energized even after the heat insulation / pumping is completed, and the boiling area of the hot water is heated while securing the amount of heat necessary for the next heat hold / pickup and hot water supply from the currant in the upper region of the tank 10. For the user who is restricted to the upper region of the tank 10 and does not want to increase the running cost due to unnecessary energization of the heater 11, the heating can be completed only by boiling up the necessary amount of heat.

また、沸き上げの第２の終了条件として、保温・追いだきによってタンク１０内の湯水の沸き上げを開始した時点から、予め定められた所定時間Ｂ１の経過したときとしている。この条件のときに、ヒータ１１への通電を停止することで、タンク１０の沸き上げが終了される。これにより、保温・追いだきが終了した後もヒータ１１の通電を継続し、タンク１０上部領域に次回の保温・追いだき及びカランからの給湯に必要な熱量を確保しつつ、タンク１０内の湯水の沸き上げを一定時間のみに規制することになり、不必要なヒータ１１への通電によりランニングコストが高くなることを望まない使用者に対しては、必要熱量のみの沸き上げで終了させることができる。 Further, the second end condition of the boiling is when a predetermined time B1 elapses from the point of time when boiling of hot water in the tank 10 is started by heat insulation and chasing. Under this condition, the heating of the tank 10 is finished by stopping the energization of the heater 11. As a result, the heater 11 continues to be energized even after the heat insulation / chasing is completed, and the hot water in the tank 10 is secured in the upper region of the tank 10 while securing the amount of heat necessary for the next heat insulation / chasing and hot water supply from the currant. For a user who does not want the running cost to be increased due to unnecessary energization of the heater 11, the boiling of the heater 11 can be terminated by boiling only the necessary amount of heat. it can.

また、沸き上げの第３の終了条件として、保温・追いだきが終了したときとしている。この条件のときに、ヒータ１１への通電を停止することで、タンク１０の沸き上げが終了される。これにより、保温・追いだきが終了した時に連動して、
タンク１０内の湯水の沸き上げを終了することになり、不必要なヒータへの通電によりランニングコストが高くなることを望まない使用者に対しては、更に必要熱量のみの沸き上げで終了させることができる。 In addition, as the third end condition of boiling, it is assumed that the heat insulation and chasing end. Under this condition, the heating of the tank 10 is finished by stopping the energization of the heater 11. As a result, when the heat insulation and chasing ends,
For users who do not want the running cost to increase due to energization of unnecessary heaters, the boiling of hot water in the tank 10 will be completed, and the heating will be completed with only the necessary amount of heat. Can do.

また、沸き上げの第４の終了条件として、上部タンク温度検出部１９が予め定められた沸き上げ終了温度Ａ３に達したことを検出した後に、ヒータ１１への通電を行うと共に、通常の夜間の沸き上げと同じように沸き上げ循環ポンプ１３の駆動・停止を繰り返す第２の沸き上げ動作を行い、タンク１０の上部領域から下部領域に向けてお湯を貯湯させていき、そして、下部タンク温度検出部２１が予め定められた沸き上げ終了温度Ａ４に達したことを検出したときに終了としている。この条件のときに、ヒータ１１への通電を停止することで、タンク１０の沸き上げが終了される。これにより、保温・追いだきが終了した後もヒータ１１の通電を継続し、タンク１０上部領域の熱量に併せて、更に熱量を確保する事ができる。この終了条件により、使用者が十分な熱量が必要と判断したとき、予め余分に確保しておくことができる。 In addition, as the fourth boiling end condition, the heater 11 is energized after detecting that the upper tank temperature detection unit 19 has reached a predetermined boiling end temperature A3, and the normal night time As in the case of boiling, a second boiling operation in which the boiling circulation pump 13 is repeatedly driven and stopped is performed, hot water is stored from the upper area of the tank 10 toward the lower area, and the lower tank temperature is detected. The process is terminated when it is detected that the part 21 has reached a predetermined boiling end temperature A4. Under this condition, the heating of the tank 10 is finished by stopping the energization of the heater 11. Thus, the heater 11 can be energized even after the heat insulation and chasing is completed, and the amount of heat can be further secured in accordance with the amount of heat in the upper region of the tank 10. With this termination condition, when the user determines that a sufficient amount of heat is necessary, an extra amount can be secured in advance.

また、沸き上げの第５の終了条件として、保温・追いだきが終了したときを起点として、予め定められた所定時間Ｂ２経過後に、継続してヒータ１１への通電を行うと共に、通常の夜間の沸き上げと同じように沸き上げ循環ポンプ１３の駆動・停止を繰り返す第２の沸き上げ動作を終了としている。この条件のときに、ヒータ１１への通電を停止することで、タンク１０の沸き上げが終了される。これにより、保温・追いだきが終了した後もヒータ１１の通電を継続し、タンク１０上部領域の熱量に併せて、更に熱量を確保する事ができる。この終了条件により、使用者が十分な熱量が必要と判断したとき、予め余分に確保しておくことができる。 In addition, as a fifth end condition for boiling, the heater 11 is continuously energized after a predetermined time B2 has elapsed, starting from the end of heat insulation and chasing, and the normal nighttime The second boiling operation that repeats driving / stopping of the boiling circulation pump 13 in the same manner as the boiling is ended. Under this condition, the heating of the tank 10 is finished by stopping the energization of the heater 11. Thus, the heater 11 can be energized even after the heat insulation and chasing is completed, and the amount of heat can be further secured in accordance with the amount of heat in the upper region of the tank 10. With this termination condition, when the user determines that a sufficient amount of heat is necessary, an extra amount can be secured in advance.

以上のように、本発明にかかる貯湯式給湯器は、風呂操作を行ったとき、予め設定された沸き上げ湯量より所定量だけ多めに沸き上げることが可能になるので、風呂浴槽の湯水を追い焚きする機能を有した追い焚き機能付き貯湯式給湯器に有用である。 As described above, the hot water storage type water heater according to the present invention can be heated up by a predetermined amount more than a preset amount of hot water when a bath operation is performed. It is useful for a hot water storage type hot water heater with a reheating function that has a function of burning.

本発明の貯湯式給湯器の構成を示す模式図The schematic diagram which shows the structure of the hot water storage type water heater of this invention. 本発明の通常の沸き上げ動作を示すフローチャートThe flowchart which shows the normal boiling operation of this invention 本発明の保温・追い焚きを行ったときのタンク内の温度分布図Temperature distribution diagram in the tank when the heat insulation and reheating of the present invention is performed 従来の貯湯式給湯器の構成を示す模式図Schematic diagram showing the structure of a conventional hot water heater

Explanation of symbols

１０タンク
１１ヒータ
１２沸き上げ循環路
１３沸き上げ循環ポンプ
１４熱交換器
１５風呂循環路
１７風呂循環ポンプ
１８風呂温度検出部
１９上部タンク温度検出部
２１下部タンク温度検出部 DESCRIPTION OF SYMBOLS 10 Tank 11 Heater 12 Boiling circulation path 13 Boiling circulation pump 14 Heat exchanger 15 Bath circulation path 17 Bath circulation pump 18 Bath temperature detection part 19 Upper tank temperature detection part 21 Lower tank temperature detection part

Claims

A hot water storage tank, a heater provided in the upper part of the hot water storage tank, a boiling circulation path formed by connecting a lower part and an upper part of the hot water storage tank, a boiling circulation pump for supplying hot water to the boiling circulation path, A heat exchanger provided in an upper portion of the hot water storage tank, a bath circulation path for circulating bath water through the heat exchanger, a bath circulation pump for circulating bath water in the bath circulation path, and a bath circulation path A bath temperature detector for detecting bath water temperature; an upper tank temperature detector for detecting hot water temperature above the hot water storage tank; and a lower tank temperature detector below the upper tank temperature detector; At the time of reheating the bath water by the exchanger, the bath circulation pump is driven and heated until the bath temperature detecting unit detects a predetermined bath set temperature A1, and before the reheating operation is performed. When the upper tank temperature detecting section detects start temperature A2 boiling predetermined, starts the current supply to the heater, the boiling circulation pump to the detection of the finishing temperature A3 raise the upper tank temperature detecting section is boiling A first boiling operation that is not driven is performed, and after the bath water replenishment operation is completed, a second boiling operation that starts heating with a heater while driving the boiling pump is started. The hot water storage type hot water heater is characterized in that the second boiling operation is ended when a predetermined boiling end temperature A4 is detected.

A hot water storage tank, a heater provided in the upper part of the hot water storage tank, a boiling circulation path formed by connecting a lower part and an upper part of the hot water storage tank, a boiling circulation pump for supplying hot water to the boiling circulation path, A heat exchanger provided in an upper portion of the hot water storage tank, a bath circulation path for circulating bath water through the heat exchanger, a bath circulation pump for circulating bath water in the bath circulation path, and a bath circulation path A bath temperature detector for detecting bath water temperature; an upper tank temperature detector for detecting hot water temperature above the hot water storage tank; and a lower tank temperature detector below the upper tank temperature detector; At the time of reheating the bath water by the exchanger, the bath circulation pump is driven and heated until the bath temperature detecting unit detects a predetermined bath set temperature A1, and before the reheating operation is performed. When the upper tank temperature detecting section detects start temperature A2 boiling predetermined, starts the current supply to the heater, the boiling circulation pump to the detection of the finishing temperature A3 raise the upper tank temperature detecting section is boiling After the first boiling operation that is not driven is performed and the reheating operation of the bathtub water is completed , the second boiling operation that is heated by the heater while driving the boiling pump is started, and the reheating operation of the bathtub water is completed. The hot water storage type hot water heater is characterized in that the second boiling operation is terminated when a predetermined time B2 elapses from the time when the water is heated.