JP4748201B2

JP4748201B2 - Hot water storage hot water bath equipment

Info

Publication number: JP4748201B2
Application number: JP2008260071A
Authority: JP
Inventors: 和也上村; 英樹石田
Original assignee: Denso Corp
Current assignee: Denso Corp
Priority date: 2003-03-28
Filing date: 2008-10-06
Publication date: 2011-08-17
Anticipated expiration: 2024-02-02
Also published as: JP2009030972A

Description

本発明は、貯湯タンク内に貯湯された温水との間接熱交換により浴槽内の湯水の追焚きまたは保温を行う貯湯式給湯風呂装置に関するものである。 The present invention relates to a hot water storage hot water bath apparatus that performs reheating or keeping warm of hot water in a bathtub by indirect heat exchange with hot water stored in a hot water storage tank.

この種の貯湯式給湯風呂装置における従来技術として、例えば特許文献１には、貯湯タンク内に設けられた間接熱交換器を風呂循環回路に接続し、貯湯タンク内の温水を利用して電熱ヒータ等を用いなくとも浴槽水の追焚きや保温をできるようにしたものが開示されている。
特開平１１−８３１５６号公報 As a conventional technique in this type of hot water storage hot water bath apparatus, for example, in Patent Document 1, an indirect heat exchanger provided in a hot water storage tank is connected to a bath circulation circuit, and an electric heater is used using hot water in the hot water storage tank. The thing which made it possible to chase and keep warm of bathtub water without using etc. is disclosed.
Japanese Patent Laid-Open No. 11-83156

しかしながら、上記した従来の技術では、貯湯タンク内の蓄熱量の大小に関らず、追焚き目標湯温までの加熱動作を実施するため、貯湯タンク内の貯湯量が少なかったり貯湯温度が低かったりして蓄熱量が少ない場合や、追焚き前の浴槽水温が著しく低かったりその水量が多かったりして、その浴槽水を目標湯温まで昇温するのに必要な熱量が多い場合は、熱量が不足する。 However, in the above-described conventional technology, regardless of the amount of heat stored in the hot water storage tank, the heating operation is performed up to the reheating target hot water temperature, so the amount of hot water stored in the hot water storage tank is small or the hot water storage temperature is low. If the amount of heat stored is small, or the bath water temperature before reheating is extremely low or the amount of water is large, and the amount of heat necessary to raise the bath water to the target hot water temperature is large, Run short.

そのため、昼間時間帯であってもヒートポンプユニット（以下、Ｈ／Ｐと記載する。）を運転して給湯用水を沸き増しすることが必要となり、ランニングコストが高くつくという問題点がある。また、追焚き開始後、浴槽湯温が上昇すると共に、貯湯タンク内の貯湯湯温が下降する。そして、浴槽湯温と貯湯湯温との差が小さくなるにつれ、加熱能力は低下してしまう。この場合、沸き増しをしても熱交換位置まで到達するまでには時間が掛かるため、最後のあと僅かな温度差の昇温ほど時間が掛かるという問題点がある。 Therefore, it is necessary to operate the heat pump unit (hereinafter referred to as H / P) to boil water for hot water supply even during daytime hours, and there is a problem that running cost is high. In addition, after the start of chasing, the bath water temperature rises and the hot water temperature in the hot water storage tank falls. And a heating capability will fall as the difference of bathtub hot water temperature and hot water storage hot water temperature becomes small. In this case, since it takes time to reach the heat exchanging position even if the boiling is increased, there is a problem that it takes more time to raise the temperature difference slightly after the end.

本発明は、上記従来技術の問題点に鑑みて成されたものであり、その目的は、浴槽水の追焚きもしくは保温する時の目標湯温までの昇温を短時間で確実に行なえると共に、その追焚きもしくは保温に係るランニングコストを抑えることのできる貯湯給湯風呂装置を提供することにある。 The present invention has been made in view of the above-described problems of the prior art, and the purpose thereof is to reliably raise the temperature up to the target hot water temperature in the case of pursuing or keeping warm the bath water in a short time. Another object of the present invention is to provide a hot-water storage hot-water bath apparatus that can suppress running costs associated with chasing or keeping warm.

本発明は上記目的を達成するために、下記の技術的手段を採用する。すなわち、請求項１に記載の発明では、浴槽水を目標温度にまで昇温する追焚き時、第１貯湯タンク（１Ａ）で蓄熱している熱量（Ｑ _１）が、浴槽水を目標温度にまで昇温するために必要な熱量（Ｑ _０）よりも少なく、且つ第１貯湯タンク（１Ａ）で蓄熱している熱量（Ｑ _１）が、貯湯流れ下流側の第２貯湯タンク（１Ｂ）で蓄熱している熱量（Ｑ _２）よりも少ない場合で、所定量の注し湯で浴槽（３）内の浴槽水を目標温度まで昇温させることが可能と判断されると、流路切換手段（２３）にて間接熱交換器（１７）側を閉鎖してバイパス管（２２）と風呂循環回路（１６）とを連通させると共に、湯張り管（２４）から風呂循環回路（１６）を通して所定量の貯湯タンク（１）内の温水を浴槽（３）内に高温注し湯することによる昇温を実施してから追焚きを実施することを特徴としている。 The present invention, in order to achieve the above object, employing the technical means described below. That is, in the invention described in claim 1, when reheating the bath water to the target temperature, the amount of heat (Q ₁ ) stored in the first hot water storage tank ( _{1 A} ) is set to the target temperature. The amount of heat (Q ₁ ) stored in the first hot water storage tank (1A) is less than the amount of heat (Q ₀ ) required for raising the temperature to the second hot water storage tank (1B) downstream of the hot water storage flow. When it is determined that it is possible to raise the temperature of the bathtub water in the bathtub (3) to the target temperature with a predetermined amount of pouring hot water when the amount of heat (Q ₂ ) stored is smaller, the flow path switching means (23) with communicating the bypass pipe closes the indirect heat exchanger (17) side (22) and a bath circulation circuit (16) in, where the hot water filling pipe (24) through the bath circulation circuit (16) due to a high temperature dispensed water to hot water bath (3) of the hot water storage tank (1) in the quantitative It is characterized by carrying out the reheating after implementing the warm.

この請求項１に記載の発明によれば、高温注し湯を優先的に行うことで急速昇温ができるうえ、短時間で目標湯温までの昇温を行うことができる。また、高温注し湯を行うことで第２貯湯タンク（１Ｂ）上部に貯まっていた高温水が第１貯湯タンク（１Ａ）内へ移動して第１貯湯タンク（１Ａ）で蓄熱する熱量（Ｑ_１）が増えるため、以降の昇温時に第１貯湯タンク（１Ａ）での熱量（Ｑ_１）が不足する状態を少なくすることができる。 According to the first aspect of the present invention, it is possible to rapidly raise the temperature by preferentially performing hot pouring, and it is possible to raise the temperature to the target hot water in a short time. Further, the amount of heat (Q that is stored in the first hot water storage tank (1A) by the high temperature water stored in the upper part of the second hot water storage tank (1B) by storing the hot water by pouring hot water (Q) ₁ ) increases, so that the state in which the amount of heat (Q ₁ ) in the first hot water storage tank (1A) is insufficient during the subsequent temperature increase can be reduced.

また、請求項２に記載の発明では、第１貯湯タンク（１Ａ）の下部と第２貯湯タンク（１Ｂ）の上部とを連通する連通路（３０）の途中に流入路切換手段（３３）を設け、第２貯湯タンク（１Ｂ）から流出する高温水を第１貯湯タンク（１Ａ）の下部に流入させるか、または間接熱交換器（１７）の直下に流入させるかを切り換えられるようにしたことを特徴としている。 In the second aspect of the present invention, the inflow channel switching means (33) is provided in the middle of the communication passage (30) that connects the lower part of the first hot water storage tank (1A) and the upper part of the second hot water storage tank (1B). It is possible to switch between high temperature water flowing out from the second hot water storage tank (1B) and flowing into the lower part of the first hot water storage tank (1A) or directly under the indirect heat exchanger (17). It is characterized by.

この請求項２に記載の発明によれば、上記高温注し湯を実施したときに第２貯湯タンク（１Ｂ）から第１貯湯タンク（１Ａ）へ流入する高温水を間接熱交換器（１７）の直下に流入させることにより、高温水が第１貯湯タンク（１Ａ）下部の中温水と混合することによる放熱ロスを軽減して昇温に必要な熱量を即座に補充することができ、より短時間で目標湯温までの昇温を行うことができる。
また、浴槽水の昇温だけではなく給湯のときにでも、第１貯湯タンク（１Ａ）の熱量（Ｑ_１）が不足している場合に第１貯湯タンク（１Ａ）上部近傍に第２貯湯タンク（１Ｂ）の高温水を注入することで、中温水の生成量も抑制され効率良く高温水を補充することができる。
また、請求項３に記載の発明では、給水管（７）と、給水管（７）からの水と出湯管（８）からの湯とを混合する温調弁（９）とを有し、湯張り管（２４）は温調弁（９）の下流側に接続されることを特徴としている。尚、上記各手段の括弧内の符号は、後述する実施形態に記載の具体的手段との対応関係を示す一例である。 According to the second aspect of the present invention, the hot water flowing from the second hot water storage tank (1B) to the first hot water storage tank (1A) when the high temperature pouring hot water is carried out is used as an indirect heat exchanger (17). , It is possible to reduce the heat loss caused by mixing the high temperature water with the medium temperature water below the first hot water storage tank (1A), and to immediately replenish the amount of heat required for the temperature increase. The temperature can be raised to the target hot water temperature over time.
In addition, when the amount of heat (Q ₁ ) of the first hot water storage tank (1A) is insufficient not only in raising the temperature of the bath water but also when supplying hot water, the second hot water storage tank is located near the upper portion of the first hot water storage tank (1A). By injecting the high-temperature water (1B), the amount of medium-temperature water produced can be suppressed and the high-temperature water can be replenished efficiently.
Moreover, in invention of Claim 3, it has a water supply pipe (7), and the temperature control valve (9) which mixes the water from a water supply pipe (7), and the hot water from a tapping pipe (8), The hot water filling pipe (24) is connected to the downstream side of the temperature control valve (9). In addition, the code | symbol in the bracket | parenthesis of each said means is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

（参考例）
以下、本発明の実施の形態について図面を用いて説明する。図１は、本発明の参考例における貯湯式給湯風呂装置の構成を示す模式図である。１は温水を貯湯する貯湯タンク、２は温水を加熱する加熱手段としてのヒートポンプユニット、３は浴槽である。４は貯湯タンク１とヒートポンプユニット２を循環可能に接続する加熱循環回路で、加熱循環ポンプ５を有し、貯湯タンク１の下部に接続されたヒートポンプ往き管４ａ、及び貯湯タンク１の上部に接続されたヒートポンプ戻り管４ｂより構成され、貯湯タンク１下部の冷水をヒートポンプ往き管４ａを介してヒートポンプユニット２で加熱し、加熱された高温水をヒートポンプ戻り管４ｂを介して貯湯タンク１上部に戻して貯湯タンク１内に加熱された高温水を貯湯するものである。 ( Reference example )
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram showing a configuration of a hot water storage hot water bath apparatus in a reference example of the present invention. 1 is a hot water storage tank for storing hot water, 2 is a heat pump unit as a heating means for heating the hot water, and 3 is a bathtub. Reference numeral 4 denotes a heating circulation circuit that connects the hot water storage tank 1 and the heat pump unit 2 so as to be circulated. The heating circulation circuit 5 has a heat circulation pump 5 and is connected to the heat pump forward pipe 4 a connected to the lower part of the hot water storage tank 1 and the upper part of the hot water storage tank 1. The heat pump return pipe 4b is configured to heat the cold water in the lower part of the hot water storage tank 1 by the heat pump unit 2 through the heat pump forward pipe 4a, and return the heated high temperature water to the upper part of the hot water storage tank 1 through the heat pump return pipe 4b. The hot water stored in the hot water storage tank 1 is stored.

尚、貯湯タンク１の外周面には縦に複数個の貯湯温度センサ６ａ〜６ｄを有しており、この貯湯温度センサ６ａ〜６ｄが所定温度以上を検出することで貯湯量を検知するものである。７は貯湯タンク１に水を供給する給水管、８は貯湯タンク１内の高温水を出湯する出湯管、９は給水管７からの冷水と出湯管８からの高温水とを設定温度になるように混合して温度調節する温調弁、１０は混合された設定温度の温水を給湯する給湯管、１１は給湯管１０の端部で風呂や台所等に設けられた蛇口である。 The hot water storage tank 1 has a plurality of hot water storage temperature sensors 6a to 6d vertically, and the hot water storage temperature sensors 6a to 6d detect a hot water storage amount by detecting a predetermined temperature or more. is there. 7 is a water supply pipe for supplying water to the hot water storage tank 1, 8 is a hot water discharge pipe for discharging hot water in the hot water storage tank 1, and 9 is a set temperature of cold water from the water supply pipe 7 and hot water from the hot water discharge pipe 8. A temperature control valve 10 for mixing and adjusting the temperature as described above, 10 is a hot water supply pipe for supplying hot water having a mixed set temperature, and 11 is a faucet provided at the end of the hot water supply pipe 10 in a bath or kitchen.

１２は温調弁9の下流に設けた給湯温度センサ、１３は湯量をカウントする給湯流量センサである。尚、１４は水道圧を所定の圧力に減圧する減圧弁、１５は加熱されることによる過圧を逃がす圧力逃し弁である。１６は風呂循環回路で、貯湯タンク１内に設けられた蛇管よりなる間接熱交換器１７と浴槽３とを風呂往き管１６ａ、及び風呂戻り管１６ｂとで循環可能に接続するものである。 12 is a hot water supply temperature sensor provided downstream of the temperature control valve 9, and 13 is a hot water supply flow rate sensor for counting the amount of hot water. Reference numeral 14 is a pressure reducing valve for reducing the water pressure to a predetermined pressure, and 15 is a pressure relief valve for releasing overpressure caused by heating. Reference numeral 16 denotes a bath circulation circuit, which connects the indirect heat exchanger 17 made of a serpentine pipe provided in the hot water storage tank 1 and the bathtub 3 so as to be circulated by a bath outlet pipe 16a and a bath return pipe 16b.

１８は風呂循環回路１６に設けられた風呂循環ポンプ、１９は流水の有無を検知する流水センサ、２０は風呂循環回路１６を流れる浴槽水の温度を検出する風呂温度センサ、２１は浴槽水の水圧から浴槽３内の水位を検出する水位センサである。２２は間接熱交換器１７をバイパスして風呂往き管１６ａと風呂戻り管１６ｂとを接続するバイパス管で、流路切換手段としての三方弁２３がバイパス管２２と風呂戻り管１６ｂの接続部に設けられ、風呂循環回路１６を流れる温水を間接熱交換器１７に流すか否かを選択的に切り換えるものである。 18 is a bath circulation pump provided in the bath circulation circuit 16, 19 is a running water sensor that detects the presence or absence of running water, 20 is a bath temperature sensor that detects the temperature of bath water flowing through the bath circulation circuit 16, and 21 is the water pressure of bath water. It is a water level sensor which detects the water level in bathtub 3 from. Reference numeral 22 denotes a bypass pipe that bypasses the indirect heat exchanger 17 and connects the bath outlet pipe 16a and the bath return pipe 16b. A three-way valve 23 as a flow path switching means is connected to the bypass pipe 22 and the bath return pipe 16b. It is provided and selectively switches whether or not the hot water flowing through the bath circulation circuit 16 flows to the indirect heat exchanger 17.

２４は給湯管１０の途中から分岐されて風呂循環回路１６に接続され浴槽３への湯張りを行うための湯張り管、２５はこの湯張り管２４に設けられ浴槽３への湯張りの開始・停止を行う湯張り弁、２６は浴槽３への湯張り量をカウントする風呂流量センサである。 A hot water filling pipe 24 is branched from the middle of the hot water supply pipe 10 and connected to the bath circulation circuit 16 to fill the bathtub 3, and 25 is provided on the hot water filling pipe 24 and starts filling the bathtub 3. A hot water filling valve 26 for stopping, and a bath flow sensor 26 for counting the amount of hot water filling to the bathtub 3.

尚、２７は湯張り管２４と水位センサ２１との間に設けられる二方弁で、湯張り時に一旦開弁して風呂戻り管１６ｂの湯張り管２４から浴槽３までの配管のエアパージを行った後、閉弁して水位センサ２１で正確な水位を監視しながら湯張りを行なえるようにするものである。２８はヒートポンプユニット２の加熱制御を行う加熱制御部、２９は給湯および風呂の制御を行う給湯風呂制御部である。 Reference numeral 27 denotes a two-way valve provided between the hot water filling pipe 24 and the water level sensor 21. When the hot water is filled, the valve 27 is once opened to purge air from the hot water filling pipe 24 of the bath return pipe 16b to the bathtub 3. Then, the valve is closed so that the water level can be filled while the water level sensor 21 monitors the accurate water level. Reference numeral 28 denotes a heating control unit that controls the heating of the heat pump unit 2, and reference numeral 29 denotes a hot water bath control unit that controls hot water and bath.

次に、本参考例の特徴的作動を図２に基づき説明する。図２は、本発明の参考例における給湯風呂制御部２９での追焚き制御の概略の流れを示すフローチャートである（但し、各機器の作動までは含まない。）。まず、給湯風呂制御部２９に接続された図示しないリモコンにて風呂の追焚きが指示されると、ステップＳ１で、間接熱交換器１７を加熱するだけの貯湯が貯湯タンク１内にあるか否かを判定する。本参考例ではその必要貯湯量を、５０℃の湯が５０リットル（以下、リットルはＬと記載する。）以上としている。 Next, the characteristic operation of this reference example will be described with reference to FIG. FIG. 2 is a flowchart showing an outline flow of the reheating control in the hot water bath control unit 29 in the reference example of the present invention (however, the operation of each device is not included). First, when a reheating bath is instructed by a remote controller (not shown) connected to the hot water bath control unit 29, whether or not hot water storage for heating the indirect heat exchanger 17 is in the hot water storage tank 1 in step S1. Determine whether. In this reference example, the required hot water storage amount is 50 liters or more for hot water at 50 ° C. (hereinafter, liters are described as L).

この判定結果がＮＯで必要貯湯量の５０℃×５０Ｌを切る場合はステップＳ２に進み、Ｈ／Ｐを運転して給湯用水の湧き上げを行う。そして、ステップＳ３では必要貯湯量以上の沸き上げが完了したか否かを判定する。本参考例ではその判定貯湯量を、５０℃の湯が１００Ｌ以上としており、判定結果がＮＯの間は沸き上げを続行する。そして、判定結果がＹＥＳとなって貯湯量が１００Ｌ以上になったことを検出したらＨ／Ｐの運転を停止してステップＳ４へ進む。また、ステップＳ１の判定結果がＹＥＳで、貯湯タンク１内に必要貯湯量の５０℃×５０Ｌ以上の貯湯がある場合もステップＳ４へと進む。 When the determination result is NO and the required hot water storage amount of 50 ° C. × 50 L is cut off, the process proceeds to step S 2, where the H / P is operated to raise the hot water supply water. Then, in step S3, it is determined whether or not boiling over the required amount of stored hot water has been completed. In this reference example, the determined hot water storage amount is set to 100 L or more for hot water at 50 ° C., and boiling is continued while the determination result is NO. Then, when the determination result is YES and it is detected that the amount of stored hot water is 100L or more, the operation of H / P is stopped and the process proceeds to step S4. Further, if the determination result in step S1 is YES and there is hot water storage in the hot water storage tank 1 that is 50 ° C. × 50 L or more of the required hot water storage amount, the process proceeds to step S4.

ステップＳ４では、三方弁２３を間接熱交換器１７側に切り換えて二方弁２７を開き、風呂循環ポンプ１８を駆動して浴槽３内の湯水を貯湯タンク１内の高温の温水中に設けられた間接熱交換器１７を流通させて、貯湯タンク１の貯湯温水の熱を利用して浴槽水の加熱を開始する。また、ステップＳ５では、加熱のための循環を開始してから一定時間（本参考例では２分）経って風呂循環回路１６内の湯温が均一となりエアーも抜けた頃合いで、風呂温度センサ２０にて浴槽水の現在温度、およびリモコンで設定されている追炊き目標温度を取り込む。 In step S4, the three-way valve 23 is switched to the indirect heat exchanger 17 side, the two-way valve 27 is opened, the bath circulation pump 18 is driven, and hot water in the bathtub 3 is provided in hot hot water in the hot water storage tank 1. The indirect heat exchanger 17 is circulated, and heating of the bath water is started using the hot water stored in the hot water storage tank 1. In step S5, at suitable time constant time (2 minutes in this Example) Air also exits later to become a uniform hot water bath circulation circuit 16 circulates from the start for heating, bath temperature sensor At 20, the current temperature of the bath water and the target cooking temperature set by the remote controller are captured.

ステップＳ６では、水位センサ２１で検出される現在浴槽水量×先の現在温度の浴槽水を目標温度まで昇温するのに必要な熱量Ｑ_０に対して、貯湯タンク１内の貯湯量×貯湯温度からの蓄熱量Ｑ_１の方が大であるか否かを判定する。その判定結果がＮＯで蓄熱量Ｑ_１が小の場合はステップＳ７に進み、所定量の注湯（本参考例は６０℃の湯を３０Ｌ）で目標温度までの昇温が可能か否かを判定する。 In step S6, the amount of hot water stored in the hot water storage tank 1 x hot water storage temperature with respect to the amount of heat Q ₀ required to raise the temperature of the current bathtub water detected by the water level sensor 21 to the target temperature. towards the heat storage amount to Q ₁ from determines whether it is large. The determination result is when the heat storage amount Q ₁ is small in NO proceeds to step S7, whether it is possible heating up to the target temperature by a predetermined amount of pouring (the hot water of this reference example 60 ° C. 30L) judge.

この判定結果がＮＯで所定量の注湯では目標温度までの昇温ができない間は、ステップＳ８の処理として浴槽水を間接熱交換器１７に流通させ、貯湯タンク１内の貯湯温水の熱を利用した浴槽水の追炊き加熱を続行する。そして、浴槽湯温が除除に上がってきて、残りの温度差は所定量の注湯にて目標温度までの昇温が可能としてステップＳ７の判定がＹＥＳとなったらステップＳ９に進み、三方弁２３をバイパス管２２側に切り換え湯張り弁２５を開いて貯湯タンク１内高温水の注し湯を開始するものである。 While the determination result is NO and while the predetermined amount of pouring cannot be raised to the target temperature, the bath water is circulated to the indirect heat exchanger 17 as the process of step S8, and the hot water in the hot water storage tank 1 is heated. Continue cooking and heating the bath water used. Then, when the bath water temperature rises and the remaining temperature difference can be raised to the target temperature with a predetermined amount of pouring, the process proceeds to step S9 when the determination in step S7 becomes YES, and the three-way valve 23 is switched to the bypass pipe 22 side and the hot water filling valve 25 is opened to start pouring hot water in the hot water storage tank 1.

注し湯開始後、ステップＳ１０では浴槽水位が浴槽上限で止まっていないか否か、いわゆる越流（溢れ）がないか否かを判定する。その判定結果がＮＯで越流している（浴槽から溢れている）と判定される場合はステップＳ１１へ進み、その処置として湯張り弁２５を閉じて注し湯を中止し三方弁２３を間接熱交換器１７側に切り換えてステップＳ１３に進む。また、ステップＳ１０の判定結果がＹＥＳで越流（溢れ）なしと判定される場合は、ステップＳ１２で風呂流量センサ２６にて所定量（本参考例は３０Ｌ）の注湯が完了したか否かを判定する。 After the start of pouring hot water, it is determined in step S10 whether the bathtub water level has stopped at the upper limit of the bathtub, or whether there is a so-called overflow (overflow). If the determination result is NO and it is determined that the tank overflows (overflow from the bathtub), the process proceeds to step S11, and as the treatment, the hot water valve 25 is closed and poured, the hot water is stopped and the three-way valve 23 is indirectly heated. Switch to the exchanger 17 side and proceed to step S13. If the determination result in step S10 is YES and it is determined that there is no overflow (overflow), whether or not a predetermined amount (30 L in this reference example) of pouring is completed in the bath flow sensor 26 in step S12. Determine.

この判定結果がＮＯの間は注湯を続行し、ＹＥＳとなった場合は湯張り弁２５を閉じて注湯を終了し三方弁２３を間接熱交換器１７側に切り換えてステップＳ１３に進む。また、前述のステップＳ６の判定がＹＥＳで、浴槽水の昇温に必要な熱量Ｑ_０に対して貯湯タンク１内の蓄熱量Ｑ_１の方が大である場合もステップＳ１３に進む。 While the determination result is NO, pouring is continued. If YES, the hot water filling valve 25 is closed to terminate pouring, the three-way valve 23 is switched to the indirect heat exchanger 17 side, and the process proceeds to step S13. Further, in YES determination at step S6 described above, even if the direction of the heat storage amount to Q ₁ in the hot water storage tank 1 for heat Q ₀ required for raising the temperature of the bathtub water is larger the process proceeds to step S13.

そして、ステップＳ１３では浴槽水温が目標温度に達したか否かを判定し、その判定結果がＮＯの間は浴槽水を間接熱交換器１７に流通させ、貯湯タンク１内の貯湯温水の熱を利用した浴槽水の追炊き加熱を続行し、浴槽水温が目標温度に達してＹＥＳとなった場合は風呂循環ポンプ１８を停止させて追炊きを終了する。 In step S13, it is determined whether or not the bath water temperature has reached the target temperature. When the determination result is NO, the bath water is circulated to the indirect heat exchanger 17, and the hot water in the hot water storage tank 1 is heated. If the bath water temperature reaches the target temperature and the answer is YES, the bath circulation pump 18 is stopped to finish the additional cooking.

図３は、追焚き時の時間と浴槽温度との関係を表すグラフであり、発明者らがグラフ下に示す仮想条件で、目標温度に到達するまでの追炊き時間をシミュレーションした結果を示す。まず、追炊きＡとして、従来の浴槽水を間接熱交換器１７に流通させ、貯湯タンク１内の貯湯温水の熱を利用して浴槽水の加熱をする方法（注湯レス追炊き）では３０℃の浴槽水を４０℃まで昇温するのに４０分掛かることを示している。 FIG. 3 is a graph showing the relationship between the time of reheating and the bath temperature, and shows the result of simulation of the reheating time until the inventors reach the target temperature under the virtual conditions shown below the graph. First, as additional cooking A, conventional bathtub water is circulated to the indirect heat exchanger 17 and the hot water stored in the hot water storage tank 1 is used to heat the hot water of the hot water (no pouring without additional pouring). It shows that it takes 40 minutes to raise the temperature of the bathtub water at 40 ° C. to 40 ° C.

次に、追炊きＢとして、同様の条件で追炊きを行い最後に６０℃の湯を１０Ｌ注し湯して目標温度に持ってゆく場合は３５分、更に追炊きＣとして、同様の条件で追炊きを行い最後に６０℃の湯を３０Ｌ注し湯して目標温度に持ってゆく場合は２３分で目標温度に到達することを示している。 Next, as additional cooking B, when additional cooking is performed under the same conditions, and finally 10 L of 60 ° C. hot water is poured into the target temperature for 35 minutes, additional cooking C is performed under the same conditions. It shows that the target temperature is reached in 23 minutes when additional cooking is carried out and 30 L of 60 ° C. hot water is finally poured and brought to the target temperature.

このように、ある程度追焚きした後、高温注し湯により目標湯温まで昇温できるか否かを判定し、昇温可能な場合は高温注し湯を実施して昇温させるものである。本発明の制御により、貯湯タンク１内で間接熱交換器１７を加熱する温水が少なくなっている場合でも、上部の高温層より注湯することにより、Ｈ／Ｐの沸き増しを待つことなく、短時間に目標温度まで追焚きすることが可能となる。 In this way, after chasing to some extent, it is determined whether or not the temperature can be raised to the target hot water temperature by hot pouring hot water. If the temperature can be raised, the hot water is poured to raise the temperature. By the control of the present invention, even when the hot water for heating the indirect heat exchanger 17 in the hot water storage tank 1 is reduced, by pouring hot water from the upper high temperature layer, without waiting for the increase in H / P, It becomes possible to track the target temperature in a short time.

次に、本参考例での特徴を説明する。まず、浴槽水を目標温度にまで昇温する追焚き時、その昇温の補助として、三方弁２３にて間接熱交換器１７側を閉鎖してバイパス管２２と風呂循環回路１６とを連通させると共に、湯張り管２４から風呂循環回路１６を通して貯湯タンク１内の温水を浴槽３内に注し湯している。 Next, features of this reference example will be described. First, when reheating the bath water to the target temperature, as an auxiliary to the temperature increase, the indirect heat exchanger 17 side is closed by the three-way valve 23 so that the bypass pipe 22 and the bath circulation circuit 16 communicate with each other. At the same time, hot water in the hot water storage tank 1 is poured into the bathtub 3 from the hot water filling tube 24 through the bath circulation circuit 16.

これは、貯湯タンク１内の蓄熱量Ｑ_１での限界まで追焚き、または、高温注し湯で目標湯温まで到達可能な状態まで追焚きし、その後昇温補助として貯湯タンク１内の高温水を浴槽３内へ注入することにより、短時間で且つ確実に目標温度までの昇温を行っている。 This reheating to the limit in the heat storage amount to Q ₁ in the hot water storage tank 1, or, and fired additionally to the state reachable to the target hot water temperature in the high temperature dispensed water, hot then the hot water storage tank 1 as a heating aid By injecting water into the bathtub 3, the temperature is raised to the target temperature in a short time and reliably.

またこれは、昇温に必要な熱量Ｑ_０分だけ間接熱交換器１７での熱交換から得られる場合であっても、熱交換では時間の掛かる最後のあと僅かな温度差での昇温を高温注し湯とすることで、短時間で且つ確実に目標湯温までの昇温を行うことができる。また、間接熱交換器１７に与える熱量を補うためにＨ／Ｐを運転して給湯用水を沸き増しすることが不要となり、ランニングコストを抑えることができる。 Further, even if this is obtained from heat exchange in the indirect heat exchanger 17 by the amount of heat Q ₀ required for temperature rise, the heat exchange increases the temperature with a slight temperature difference after the last time. By using high-temperature pouring hot water, the temperature can be raised to the target hot water temperature in a short time and reliably. In addition, it is not necessary to operate the H / P to supplement the amount of heat given to the indirect heat exchanger 17 and increase the hot water supply water, and the running cost can be suppressed.

また、追焚き時、最初は間接熱交換器１７内に浴槽水を流通させて貯湯タンク１内の温水と熱交換することで浴槽水の昇温を行い、最後に注し湯を行って浴槽水を目標温度にまで昇温している。これにより、熱交換では時間の掛かる最後のあと僅かな温度差での昇温を高温注し湯とすることで、短時間で且つ確実に目標湯温までの昇温を行うことができる。 In addition, when bathing, the bath water is first circulated in the indirect heat exchanger 17 to exchange heat with the hot water in the hot water storage tank 1, and the bath water is heated, and finally the hot water is poured into the bathtub. The water is raised to the target temperature. Thereby, in the heat exchange, the temperature rise with a slight temperature difference after the last time, which is time-consuming, is used as the high-temperature pouring hot water, so that the temperature can be reliably raised to the target hot water temperature in a short time.

また、追焚きを行う際に使用者が注し湯の量を設定できるようになっている。これにより、設定された量だけの高温注し湯を使って目標湯温まで昇温させることとなるため、使用者は注し湯をしてでも早く目標温度としたいのか、注し湯はしないで現在湯量のまま目標温度としたいのか等を選択することができて使い勝手が向上する。 In addition, the user can set the amount of hot water to be poured when performing the chasing. As a result, only the set amount of high-temperature pouring hot water is used to raise the temperature to the target hot water temperature, so the user does not want to pour hot water even if he wants to reach the target temperature quickly. It is possible to select whether or not the target temperature remains as the current hot water volume, and the usability is improved.

また、注し湯として、給水管７からの水を温調弁９で混合することなく、貯湯タンク１内の温水をそのままの温度で浴槽３内に注し湯することもできる。これは、浴槽水の加熱には使われない貯湯タンク１上部の高温層の高温水、もしくはＨ／Ｐによる沸き増し直後の高温水を利用して浴槽３内に高温注し湯を行うものである。これにより、注し湯する湯量を減らせるうえ、少量の高温水を短時間で注湯することから、より短時間で目標湯温までの昇温を行うことができる。 Further, as hot water, the hot water in the hot water storage tank 1 can be poured into the bathtub 3 at the same temperature without mixing the water from the water supply pipe 7 with the temperature control valve 9. The hot water is poured into the bathtub 3 using hot water in the hot layer at the upper part of the hot water storage tank 1 which is not used for heating the bath water or hot water immediately after boiling by H / P. is there. As a result, the amount of hot water to be poured can be reduced, and a small amount of hot water can be poured in a short time, so that the temperature can be raised to the target hot water in a shorter time.

（第１実施形態）
図４は、本発明の第１実施形態における貯湯式給湯風呂装置の概略構成を示す模式図である。上述した参考例と異なるのは、貯湯タンク１を多缶式として複数の貯湯タンク１Ａ・１Ｂを直列につないだ構成としている。先の間接熱交換器１７を有して貯湯流れ上流側となる貯湯タンクを第１貯湯タンク１Ａ、貯湯流れ下流側となる貯湯タンクを第２貯湯タンク１Ｂとし、第１貯湯タンク１Ａの下部に設けられた下部流出入部Ａａと第２貯湯タンク（補助貯湯タンク）１Ｂの上部に設けられた上部流出入部Ｂａとを連通路３０で連通している。 (First Embodiment)
FIG. 4 is a schematic diagram showing a schematic configuration of the hot water storage hot water bath apparatus in the first embodiment of the present invention. The difference from the reference example described above is that the hot water storage tank 1 is a multi-can type and a plurality of hot water storage tanks 1A and 1B are connected in series. The hot water storage tank having the indirect heat exchanger 17 on the upstream side of the hot water storage flow is referred to as a first hot water storage tank 1A, and the hot water storage tank on the downstream side of the hot water storage flow is referred to as a second hot water storage tank 1B. The lower inflow / outflow portion Aa provided and the upper inflow / outflow portion Ba provided at the upper portion of the second hot water storage tank (auxiliary hot water storage tank) 1B are communicated with each other through the communication passage 30.

そして、加熱循環ポンプ５は、図４に示すように、通常は第１貯湯タンク１Ａ内の下部に設けられた冷水流出入部Ａｂから冷水をヒートポンプユニット２に供給し、第１貯湯タンク１Ａの上部に設けられた温水流入部Ａｃから還流する様に水流を発生させる。また、連通路３０には流通を断続する開閉手段として第１開閉弁３１を設けており、第１貯湯タンク１Ａ下部の冷水流出入部Ａｂの下側には、加熱循環回路４との流通を断続する開閉手段として第２開閉弁３２を設けている。 As shown in FIG. 4, the heating circulation pump 5 normally supplies cold water to the heat pump unit 2 from a cold water inflow / outflow portion Ab provided at the lower part in the first hot water storage tank 1A, and the upper part of the first hot water storage tank 1A. A water flow is generated so as to recirculate from the hot water inflow portion Ac provided in the water. The communication passage 30 is provided with a first opening / closing valve 31 as an opening / closing means for interrupting the circulation, and the circulation with the heating circulation circuit 4 is interrupted below the cold water inflow / outflow portion Ab below the first hot water storage tank 1A. A second opening / closing valve 32 is provided as an opening / closing means for performing the above operation.

これら両開閉弁１３・１４は、図示しない加熱制御部２８によって制御され、給湯により湯量が減って高温水が第１貯湯タンク１Ａに収まる量になった時（第１貯湯タンク１Ａの下部が冷水となった時）、第１開閉弁３１を閉じて第２開閉弁３２を開くことにより、第２貯湯タンク１Ｂは加熱循環回路４から切り離され、第１貯湯タンク１Ａだけで下部に設けた冷水流出入部Ａｂから冷水を流出して循環する状態となる。 These on-off valves 13 and 14 are controlled by a heating control unit 28 (not shown), and when the amount of hot water is reduced by hot water supply and the amount of high-temperature water reaches the first hot water storage tank 1A (the lower portion of the first hot water storage tank 1A is cold water) When the first on-off valve 31 is closed and the second on-off valve 32 is opened, the second hot water storage tank 1B is disconnected from the heating circulation circuit 4, and only the first hot water storage tank 1A is provided with cold water provided below. The cold water flows out from the inflow / outflow part Ab and enters a state of circulation.

次に、本実施形態の特徴的作動を図５に基づき説明する。図５は、本発明の第１実施形態における給湯風呂制御部２９での追焚き制御の概略の流れを示すフローチャートである（但し、各機器の作動までは含まない。）。まず、給湯風呂制御部２９に接続された図示しないリモコンにて風呂の追焚きが指示されると、ステップＳ２１で、第１貯湯タンク１Ａで蓄熱している熱量Ｑ_１が、浴槽水を目標温度にまで昇温するために必要な熱量Ｑ_０以上あるか否かを判定する。この判定結果がＹＥＳで蓄熱量Ｑ_１が必要熱量Ｑ_０以上である場合には、ステップＳ２９へと飛んで通常の追焚きモードを実施するものである。 Next, the characteristic operation of this embodiment will be described with reference to FIG. FIG. 5 is a flowchart showing a schematic flow of reheating control in the hot water bath control unit 29 in the first embodiment of the present invention (however, the operation of each device is not included). First, when fired add the bath is instructed by a remote controller (not shown) connected to the hot water bath controller 29, in step S21, the amount of heat Q ₁ that is heat accumulation in the first hot water tank 1A is, the target temperature bath water It is determined whether or not there is a heat amount Q ₀ or more necessary for raising the temperature to the point of time. When the determination result is the heat storage amount Q ₁ is heat requirements Q ₀ or more YES is to implement a normal reheating mode flying to Step S29.

しかし、ステップＳ２１の判定結果がＮＯで、蓄熱量Ｑ_１が必要熱量Ｑ_０より少ない場合はステップＳ２２に進み、今度は第２貯湯タンク１Ｂで蓄熱している熱量Ｑ_２が先の蓄熱量Ｑ_１以上あるか否かを判定する。この判定結果がＮＯで、第２貯湯タンク１Ｂにも充分な蓄熱量が無い場合には、ステップＳ２３に進んでＨ／Ｐで給湯用水の湧き増しを開始した後、ステップＳ２９へと飛んで通常の追焚きモードを実施するものである。しかし、ステップＳ２２の判定結果がＹＥＳで、第２貯湯タンク１Ｂには少なくともＱ_１以上の蓄熱量がある場合にはステップＳ２４に進み、所定量の注湯（本実施例は６０℃の湯を３０Ｌ）で目標温度までの昇温が可能か否かを判定する。 However, the determination result of step S21 is NO, the heat storage amount when Q ₁ is less than the required quantity of heat Q _0, the process proceeds to step S22, in turn heat storage amount of heat Q ₂ is ahead that heat accumulation in the second storage tank 1B Q _It is determined whether or not there is _one or more. If the determination result is NO and the second hot water storage tank 1B does not have a sufficient amount of heat storage, the routine proceeds to step S23, where the hot water supply is started to increase at H / P, and then the routine jumps to step S29. The follow-up mode is implemented. However, in YES determination result in the step S22, if the second storage tank 1B there is at least Q ₁ or more heat storage amount, the process proceeds to step S24, a predetermined amount of pouring (water in this embodiment 60 ° C. 30L), it is determined whether or not the temperature can be raised to the target temperature.

この判定結果がＮＯで、所定量の注湯では目標温度までの昇温ができない場合はステップＳ２３に進んでＨ／Ｐで給湯用水の湧き増しを開始した後、ステップＳ２９へと飛んで通常の追焚きモードを実施するものである。しかし、ステップＳ２４の判定がＹＥＳで目標温度までの昇温が可能であればステップＳ２５に進み、三方弁２３をバイパス管２２側に切り換え湯張り弁２５を開いて貯湯タンク１内高温水の注し湯を開始するものである。 If this determination result is NO and the temperature cannot be raised to the target temperature with a predetermined amount of pouring, the process proceeds to step S23, and after starting hot water supply with H / P, the process jumps to step S29 and is normal. The tracking mode is implemented. However, if the determination in step S24 is YES and the temperature can be raised to the target temperature, the process proceeds to step S25, the three-way valve 23 is switched to the bypass pipe 22 side, the hot water filling valve 25 is opened, and hot water in the hot water storage tank 1 is poured. It is what starts shiyu.

注し湯開始後、ステップＳ２６では浴槽水位が浴槽上限で止まっていないか否か、いわゆる越流（溢れ）がないか否かを判定する。その判定結果がＮＯで越流している（浴槽から溢れている）と判定される場合はステップＳ２７へ進み、その処置として湯張り弁２５を閉じて注し湯を中止し三方弁２３を間接熱交換器１７側に切り換えてステップＳ２９に進む。 After the start of pouring hot water, it is determined in step S26 whether the bathtub water level has not stopped at the upper limit of the bathtub, or whether there is a so-called overflow (overflow). When it is determined that the determination result is NO and overflowing (overflowing from the bathtub), the process proceeds to step S27, and as the treatment, the hot water valve 25 is closed, pouring is stopped, and the three-way valve 23 is indirectly heated. Switch to the exchanger 17 side and proceed to step S29.

また、ステップＳ２６の判定結果がＹＥＳで越流（溢れ）なしと判定される場合は、ステップＳ２８で風呂流量センサ２６にて所定量（本実施例は３０Ｌ）の注湯が完了したか否かを判定する。この判定結果がＮＯの間は注湯を続行し、ＹＥＳとなった場合は湯張り弁２５を閉じて注湯を終了し三方弁２３を間接熱交換器１７側に切り換えてステップＳ２９へ進む。 If the determination result in step S26 is YES and it is determined that there is no overflow (overflow), whether or not a predetermined amount (30 L in this embodiment) of pouring is completed in the bath flow sensor 26 in step S28. Determine. While the determination result is NO, pouring is continued. If YES, the hot water filling valve 25 is closed to end pouring, the three-way valve 23 is switched to the indirect heat exchanger 17 side, and the process proceeds to step S29.

ステップＳ２９では、通常の追焚きモードを実施し、ステップＳ３０では浴槽水温が目標温度に達したか否かを判定する。その判定結果がＮＯの間は浴槽水を間接熱交換器１７に流通させ、貯湯タンク１内の貯湯温水の熱を利用した浴槽水の追焚き加熱を続行し、浴槽水温が目標温度に達してＹＥＳとなった場合は風呂循環ポンプ１８を停止させて追焚きを終了するものである。 In step S29, a normal reheating mode is performed, and in step S30, it is determined whether or not the bath water temperature has reached the target temperature. While the judgment result is NO, the bath water is circulated to the indirect heat exchanger 17, and the reheating of the bath water using the hot water in the hot water storage tank 1 is continued and the bath water temperature reaches the target temperature. If YES, the bath circulation pump 18 is stopped and the chasing is finished.

次に、本実施形態での特徴を説明する。貯湯タンクを多缶式として複数の貯湯タンク１Ａ・１Ｂを直列につないで構成したものにおいて追焚きを行うとき、間接熱交換器１７を有して貯湯流れ上流側の第１貯湯タンク１Ａで蓄熱している熱量Ｑ_１が、浴槽水を目標温度にまで昇温するために必要な熱量Ｑ_０、および貯湯流れ下流側の第２貯湯タンク１Ｂで蓄熱している熱量Ｑ_２よりも少ない場合、まず高温注し湯による昇温を実施してから追焚きを実施するようにしている。 Next, features in the present embodiment will be described. When reheating in a hot water storage tank having a plurality of hot water storage tanks 1A and 1B connected in series, an indirect heat exchanger 17 is provided to store heat in the first hot water storage tank 1A upstream of the hot water storage flow. If to that quantity of heat Q ₁ is less than the quantity of heat Q ₂ to which is heat accumulation in the second storage tank 1B of heat Q _0, and the hot water storage flow downstream required to raise the temperature of the bath water to the target temperature, First, the hot water is poured and the temperature is increased by hot water, and then the reheating is performed.

これによれば、高温注し湯を優先的に行うことで急速昇温ができるうえ、短時間で目標湯温までの昇温を行うことができる。また、高温注し湯を行うことで第２貯湯タンク１Ｂ上部に貯まっていた高温水が第１貯湯タンク１Ａ内へ移動して第１貯湯タンク１Ａで蓄熱する熱量Ｑ_１が増えるため、以降の昇温時に第１貯湯タンク１Ａでの熱量Ｑ_１が不足する状態を少なくすることができる。 According to this, the temperature can be rapidly raised by preferentially performing hot pouring and hot water can be raised to the target hot water temperature in a short time. Further, since the quantity of heat Q ₁ of heat accumulation in the first hot water tank 1A is hot water which has accumulated in the second storage tank 1B top by said hot dispensed water moves to the first hot water storage tank 1A increases, since it is possible to reduce the state of insufficient amount of heat Q ₁ is in the first hot water tank 1A at Atsushi Nobori.

（第２実施形態）
図６は、本発明の第２実施形態における貯湯式給湯風呂装置の概略構成を示す模式図である。上述した第１実施形態と異なるのは、第１貯湯タンク１Ａの下部と第２貯湯タンク１Ｂの上部とを連通する連通路３０の途中に、流入路切換手段として三方弁３３を設け、第２貯湯タンク１Ｂから流出する高温水を第１貯湯タンク１Ａの下部に流入させるか、または間接熱交換器１７の直下（図６中のＡｅ）に流入させるかを切り換えられるようにしている。尚、この三方弁３３も給湯風呂制御部２９によって通電制御される。 ( Second Embodiment)
FIG. 6 is a schematic diagram showing a schematic configuration of a hot water storage hot water bath apparatus in the second embodiment of the present invention. The difference from the first embodiment described above is that a three-way valve 33 is provided as an inflow path switching means in the middle of the communication path 30 that communicates the lower part of the first hot water storage tank 1A and the upper part of the second hot water storage tank 1B. The high temperature water flowing out from the hot water storage tank 1B can be switched between flowing into the lower part of the first hot water storage tank 1A or flowing directly under the indirect heat exchanger 17 (Ae in FIG. 6). The three-way valve 33 is also energized and controlled by the hot water bath controller 29.

これによれば、上述した高温注し湯を実施したときに第２貯湯タンク１Ｂから第１貯湯タンク１Ａへ流入する高温水を間接熱交換器１７の直下に流入させることにより、高温水が第１貯湯タンク１Ａ下部の中温水と混合することによる放熱ロスを軽減して昇温に必要な熱量を即座に補充することができ、より短時間で目標湯温までの昇温を行うことができる。また、浴槽水の昇温だけではなく給湯のときにでも、第１貯湯タンク１Ａの熱量Ｑ_１が不足している場合に第１貯湯タンク１Ａ上部近傍に第２貯湯タンク１Ｂの高温水を注入することで、中温水の生成量も抑制され効率良く高温水を補充することができる。 According to this, the hot water flowing into the first hot water storage tank 1A from the second hot water storage tank 1B when the high temperature pouring hot water described above is caused to flow directly under the indirect heat exchanger 17, whereby the high temperature water is The heat loss due to mixing with the medium temperature water at the bottom of 1 hot water storage tank 1A can be reduced and the amount of heat required for temperature increase can be replenished immediately, and the temperature can be raised to the target hot water temperature in a shorter time. . Further, even when the hot water not only raising the temperature of the bath water, injecting hot water of the second water tank 1B to the first storage tank 1A upper vicinity when heat to Q ₁ first hot water storage tank 1A is insufficient By doing so, the production amount of intermediate temperature water is also suppressed and high temperature water can be replenished efficiently.

（その他の実施形態）
本発明は上述の実施形態に限定されるものではなく、例えば貯湯タンク１内の温水を沸かし上げる電熱ヒータを貯湯タンク１内に有した公知の電気温水器でも良い。また、温調弁９は給湯専用・風呂湯張り専用として２つ設ける公知の構成にしても良い。また、流路切換手段２３は三方弁に限らず、例えばバイパス管２２および間接熱交換器１７の入口または出口にそれぞれ開閉弁を設け、何れか一方を選択的に開弁するように構成しても良い。これは流入路切換手段の三方弁も同様である。また、追焚き途中に実施しても良い。 (Other embodiments)
The present invention is not limited to the above-described embodiment, and for example, a known electric water heater having an electric heater for boiling hot water in the hot water storage tank 1 in the hot water storage tank 1 may be used. Moreover, the temperature control valve 9 may have a known configuration in which two temperature control valves 9 are provided exclusively for hot water supply and bath bathing. The flow path switching means 23 is not limited to a three-way valve, and for example, an open / close valve is provided at the inlet or outlet of the bypass pipe 22 and the indirect heat exchanger 17, respectively, and either one is selectively opened. Also good. The same applies to the three-way valve of the inflow path switching means. Moreover, you may carry out in the middle of memorialization.

本発明の参考例における貯湯式給湯風呂装置の概略構成を示す模式図である。It is a schematic diagram which shows schematic structure of the hot water storage type hot water bath apparatus in the reference example of this invention. 本発明の参考例における給湯風呂制御部２９での追焚き制御の概略の流れを示すフローチャートである。It is a flowchart which shows the general | schematic flow of the chasing control in the hot water bath control part 29 in the reference example of this invention. 追焚き時の時間と浴槽温度との関係を表すグラフである。It is a graph showing the relationship between the time at the time of chasing, and bathtub temperature. 本発明の第１実施形態における貯湯式給湯風呂装置の概略構成を示す模式図である。It is a schematic diagram which shows schematic structure of the hot water storage type hot water bath apparatus in 1st Embodiment of this invention. 本発明の第１実施形態における給湯風呂制御部２９での追焚き制御の概略の流れを示すフローチャートである。It is a flowchart which shows the general | schematic flow of the chasing control in the hot water bath control part 29 in 1st Embodiment of this invention. 本発明の第２実施形態における貯湯式給湯風呂装置の概略構成を示す模式図である。It is a schematic diagram which shows schematic structure of the hot water storage type hot-water bath apparatus in 2nd Embodiment of this invention.

Explanation of symbols

１…貯湯タンク
１Ａ…第１貯湯タンク
１Ｂ…第２貯湯タンク
３…浴槽
７…給水管
８…出湯管
９…温調弁
１６…風呂循環回路
１７…間接熱交換器
１８…風呂循環ポンプ
２２…バイパス管
２３…三方弁（流路切換手段）
２４…湯張り管
３０…連通路
３３…三方弁（流入路切換手段）
Ｑ_０…浴槽水を目標温度にまで昇温するために必要な熱量
Ｑ_１…第１貯湯タンク１Ａで蓄熱している熱量
Ｑ_２…第２貯湯タンク１Ｂで蓄熱している熱量 DESCRIPTION OF SYMBOLS 1 ... Hot water storage tank 1A ... 1st hot water storage tank 1B ... 2nd hot water storage tank 3 ... Bathtub 7 ... Water supply pipe 8 ... Hot water supply pipe 9 ... Temperature control valve 16 ... Bath circulation circuit 17 ... Indirect heat exchanger 18 ... Bath circulation pump 22 ... Bypass pipe 23 ... Three-way valve (flow path switching means)
24 ... Hot water filled pipe 30 ... Communication path 33 ... Three-way valve (inflow path switching means)
Q ₀ ... Amount of heat necessary to raise the bath water to the target temperature. Q ₁ ... Amount of heat stored in the first hot water storage tank 1A. Q ₂ ... Amount of heat stored in the second hot water storage tank 1B.

Claims

A first hot water storage tank ( 1A ) for storing hot water;
A second hot water storage tank (1B) connected to the downstream side of the first hot water storage tank (1A);
An indirect heat exchanger (17) disposed in the first hot water storage tank (1 A );
A bath circulation circuit (16) for circulatingly connecting the indirect heat exchanger (17) and the bathtub (3);
A bath circulation pump (18) provided in the bath circulation circuit (16) for circulating bath water;
A hot water discharge pipe (8) connected to a part of the hot water storage tank (1A) that is above a part where the indirect heat exchanger (17) is disposed;
A hot water pipe (24) connected to the hot water pipe (8) and supplying hot water from the hot water pipe (8) into the bathtub (3);
Connected to said bath circulation circuit (16), before Symbol bypass pipe that bypasses the indirect heat exchanger (17) and (22),
The indirect heat exchanger (17) side is closed and the bypass pipe (22) communicates with the bath circulation circuit (16), or the bypass pipe (22) side is closed and the indirect heat exchanger ( 17) and a flow path switching means (23) for switching whether the bath circulation circuit (16) communicates,
In a hot water storage hot water bath apparatus for exchanging heat between hot water in the first hot water storage tank (1 A ) and bathtub water flowing in the indirect heat exchanger (17) for temperature rise or heat retention of bath water,
When reheating the bath water to the target temperature, the amount of heat (Q ₁ ) stored in the first hot water storage tank (1A) is the amount of heat required to raise the bath water to the target temperature ( Less than Q ₀ ) and the amount of heat (Q ₁ ) stored in the first hot water storage tank (1 A) is stored in the second hot water storage tank (1 B) downstream of the stored hot water (Q ₂ ) If it is determined that it is possible to raise the temperature of the bathtub water in the bathtub (3) to the target temperature with a predetermined amount of pouring hot water,
The indirect heat exchanger (17) side is closed by the flow path switching means (23) to allow the bypass pipe (22) and the bath circulation circuit (16) to communicate with each other and the hot water filled pipe (24). the predetermined amount of the hot water storage tank (1) the hot water in the bathtub (3) performing a reheating after implementing temperature increase due to the high temperature dispensed hot water in through the bath circulation circuit (16) from hot water storage type water heater bath apparatus according to claim.

An inflow path switching means (33) is provided in the middle of the communication path (30) communicating the lower part of the first hot water storage tank (1A) and the upper part of the second hot water storage tank (1B), and the second hot water storage tank (1B The high-temperature water flowing out from the first hot water storage tank (1A) or the direct flow under the indirect heat exchanger (17) can be switched. savings hot water type hot water supply bath apparatus according to 1.

A water supply pipe (7), and a temperature control valve (9) for mixing water from the water supply pipe (7) and hot water from the hot water pipe (8),
Savings hot type hot water supply bath according to claim 1 or claim 2, characterized in that it is connected to the downstream side of the water filling pipe (24) is the temperature control valve (9).