JP2013024469A - Waste hot water utilization system - Google Patents

Waste hot water utilization system Download PDF

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JP2013024469A
JP2013024469A JP2011159223A JP2011159223A JP2013024469A JP 2013024469 A JP2013024469 A JP 2013024469A JP 2011159223 A JP2011159223 A JP 2011159223A JP 2011159223 A JP2011159223 A JP 2011159223A JP 2013024469 A JP2013024469 A JP 2013024469A
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heat
hot water
storage tank
stored
water storage
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Daiki Sato
大樹 佐藤
Kentaro Sekine
賢太郎 関根
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Taisei Corp
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Taisei Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a waste hot water utilization system that can prevent lowering of water temperature of stored water in a waste hot water storage tank.SOLUTION: A hot water supply system 1 includes hot water supply equipment 2, a waste hot water storage tank 4, equipment waste hot water piping 20 and a waste hot water storage part which store waste hot water from the hot water supply equipment 2 in the waste hot water storage tank 4, a heat pump 3 which utilizes heat of the stored water in the waste hot water storage tank 4, equipment hot water supply piping 10, heat pump heat source piping 30, a hot water supply part, a heat source 5, and storage tank heat source piping 50 and a stored water heat storage part which store heat in the stored water in the waste hot water storage tank 4 by utilizing heat of the heat source 5.

Description

本発明は、排湯熱利用システムに関する。詳しくは、給湯設備等の温水利用設備からの排湯の熱を利用する排湯熱利用システムに関する。   The present invention relates to a waste water heat utilization system. More specifically, the present invention relates to a waste water heat utilization system that uses the heat of waste water from hot water utilization facilities such as hot water facilities.

従来より、排湯を貯留する雑排水槽と、この雑排水槽に隣接して設けられた熱回収用熱交換器と、雑排水槽内の貯留水から熱回収用熱交換器に熱輸送するヒートパイプと、を備える熱回収装置がある（特許文献１参照）。
この熱回収装置によれば、雑排水槽に排湯が貯留されると、ヒートパイプによりこの排湯から熱を回収して、熱回収用熱交換器に熱輸送する。熱回収用熱交換器は、この熱を熱回収用熱交換器の内部を流れる温水に放熱する。この温水を熱源として利用することで、排湯の熱を有効利用する。 Conventionally, a miscellaneous drainage tank for storing hot water, a heat recovery heat exchanger provided adjacent to the miscellaneous drainage tank, and heat transport from the stored water in the miscellaneous drainage tank to the heat recovery heat exchanger There is a heat recovery device provided with a heat pipe (refer to patent documents 1).
According to this heat recovery device, when the hot water is stored in the miscellaneous drainage tank, the heat is recovered from the hot water by the heat pipe, and the heat is transported to the heat recovery heat exchanger. The heat recovery heat exchanger radiates this heat to the hot water flowing inside the heat recovery heat exchanger. By using this hot water as a heat source, the heat of the hot water is effectively used.

特開平９−２４３２８０号公報JP-A-9-243280

上述の熱回収装置では、雑排水槽内の貯留水が高温になるに従って、高い効率で熱を利用できるため、貯留水をできる限り高温に維持することが望ましい。
しかしながら、上述のヒートパイプや熱回収用交換器は雑排水槽に設けられるため、排湯の熱を回収するのは排湯が流入する時間帯に限定される。よって、排湯が流れない時間帯では、雑排水槽内の貯留水の水温が低下してしまう。
例えば、住宅、宿泊施設、温浴施設等では、朝夕に排湯量が多く、昼間に少なくなる傾向があり、昼間に熱利用効率が低下してしまう。 In the heat recovery apparatus described above, heat can be utilized with high efficiency as the stored water in the miscellaneous drainage tank becomes high temperature. Therefore, it is desirable to maintain the stored water as high as possible.
However, since the heat pipe and the heat recovery exchanger described above are provided in the miscellaneous drainage tank, the heat of the waste water is collected only during the time period when the waste water flows. Therefore, in the time zone when the hot water does not flow, the temperature of the stored water in the miscellaneous drainage tank decreases.
For example, in a house, an accommodation facility, a hot bath facility, etc., the amount of hot water is large in the morning and evening and tends to decrease in the daytime, so that the heat utilization efficiency decreases in the daytime.

本発明は、排湯貯留槽内の貯留水の水温の低下を防止できる排湯熱利用システムを提供することを目的とする。   An object of the present invention is to provide a waste water heat utilization system capable of preventing a decrease in the temperature of stored water in a waste water storage tank.

請求項１に記載の排湯熱利用システム（例えば、後述の給湯システム１）は、温水利用設備（例えば、後述の給湯設備２）と、排湯貯留槽（例えば、後述の排湯貯留槽４）と、前記温水利用設備からの排湯を前記排湯貯留槽に貯留する排湯貯留手段（例えば、後述の設備排湯配管２０、第１開閉バルブ２１Ａ、第２開閉バルブ２１Ｂ、排湯貯留部６７）と、前記排湯貯留槽内の貯留水の熱を利用する熱利用手段（例えば、後述のヒートポンプ３、設備給湯配管１０、循環ポンプ１３、ヒートポンプ熱源配管３０、第１開閉バルブ３４Ａ、３５Ａ、第２開閉バルブ３４Ｂ、３５Ｂ、循環ポンプ３６、給湯部６４）と、熱源（例えば、後述の熱源５）と、当該熱源の熱を利用して前記排湯貯留槽内の貯留水に蓄熱する貯留水蓄熱手段（例えば、後述の貯留槽熱源配管５０、第１開閉バルブ５４Ａ、５５Ａ、第２開閉バルブ５４Ｂ、５５Ｂ、循環ポンプ５６、貯留水蓄熱部６５）と、を備えることを特徴とする。   The hot water utilization system (for example, a hot water supply system 1 described later) according to claim 1 includes a hot water utilization facility (for example, a hot water supply facility 2 described later) and a hot water storage tank (for example, a later described hot water storage tank 4). ) And hot water storage means for storing the hot water from the hot water use equipment in the hot water storage tank (for example, the equipment hot water pipe 20, the first on-off valve 21A, the second on-off valve 21B, and the hot water storage described later) Unit 67) and heat utilization means (for example, heat pump 3, equipment hot water supply pipe 10, circulation pump 13, heat pump heat source pipe 30, first open / close valve 34A, which will be described later) that use the heat of the stored water in the hot water storage tank. 35A, second opening / closing valves 34B and 35B, circulation pump 36, hot water supply section 64), heat source (for example, heat source 5 described later), and heat stored in the stored water in the waste water storage tank using the heat of the heat source. Stored water heat storage means (for example, after Reservoir heat pipe 50, the first on-off valve 54A, 55A, second on-off valve 54B, 55B, the circulating pump 56, a reservoir water heat storage unit 65), characterized in that it comprises a.

この発明によれば、温水利用設備からの排湯を排湯貯留槽に貯留して、この貯留水の熱を利用した。温水利用設備からの排湯はある程度高温であるため、排湯の熱を効果的に利用できる。特に、温浴施設、宿泊施設、集合住宅、室内プール、食品工場などの給湯負荷の大きい施設では、一定量以上の排湯を安定的に得られるため、熱の利用効率が高くなる。   According to the present invention, the hot water from the hot water use facility is stored in the hot water storage tank, and the heat of the stored water is used. Since the hot water from the hot water use facility is hot to some extent, the heat of the hot water can be used effectively. In particular, in a hot water supply facility such as a hot bath facility, an accommodation facility, an apartment house, an indoor pool, and a food factory, a certain amount or more of hot water can be stably obtained, so that heat use efficiency is increased.

さらに、熱源の熱を利用してこの貯留水に蓄熱したので、排湯が流れない時間帯であっても、熱源の熱を利用して排湯貯留槽内の貯留水を温めて、貯留水の水温の低下を防止できる。例えば太陽熱を熱源として利用した場合、熱源からの熱媒の温度は４０℃（冬季）〜１００℃（夏季）程度となる。   Further, since the heat stored in the stored water is utilized using the heat of the heat source, the stored water in the waste water storage tank is warmed using the heat of the heat source even during a time zone when the hot water does not flow. Can prevent the water temperature from decreasing. For example, when solar heat is used as a heat source, the temperature of the heat medium from the heat source is about 40 ° C. (winter) to 100 ° C. (summer).

以上のように、排湯の熱を回収して利用するだけではなく、熱源の熱も回収して利用する。これにより、貯留水の温度の低下を抑制できるだけでなく、貯留水の温度を上昇させることができるから、熱を効果的に利用できる。特に、上述の給湯負荷の大きい施設では、給湯用のエネルギ消費量を大幅に削減できることになる。   As described above, not only the heat of the waste water is recovered and used, but also the heat of the heat source is recovered and used. Thereby, not only can the decrease in the temperature of the stored water be suppressed, but also the temperature of the stored water can be raised, so that heat can be used effectively. In particular, the energy consumption for hot water supply can be greatly reduced in the facility with a large hot water supply load described above.

請求項２に記載の排湯熱利用システムは、前記熱利用手段は、前記温水利用設備に給湯する水熱源ヒートポンプ（例えば、後述のヒートポンプ３）を含むことを特徴とする。   The waste heat utilization system according to claim 2 is characterized in that the heat utilization means includes a water heat source heat pump (for example, a heat pump 3 to be described later) for supplying hot water to the hot water utilization facility.

この発明によれば、熱利用手段を、温水利用設備に給湯する水熱源ヒートポンプとした。温水利用設備からの排湯の温度は３０℃〜４０℃程度であり、熱源としてはさほど高温ではないが、水熱源ヒートポンプの熱源として十分に利用できるため、排湯の熱を効率的に利用できる。
また、水熱源ヒートポンプでは、熱媒に排湯の熱を吸熱させ、この熱媒に放熱させて給湯配管内のお湯を温める。よって、排湯の熱で給湯配管を直接温める場合と異なり、熱媒が収容された配管が破損しても、クロスコネクションが発生するのを防止できる。 According to this invention, the heat utilization means is a water heat source heat pump for supplying hot water to the hot water utilization facility. The temperature of the hot water from the hot water use facility is about 30 ° C. to 40 ° C., and it is not so hot as a heat source, but it can be used as a heat source of a water heat source heat pump, so the heat of the hot water can be used efficiently. .
Further, in the water heat source heat pump, the heat medium absorbs the heat of the waste water, and the heat medium dissipates heat to warm the hot water in the hot water supply pipe. Therefore, unlike the case where the hot water supply pipe is directly heated by the heat of the hot water, it is possible to prevent the occurrence of cross connection even if the pipe containing the heat medium is damaged.

請求項３に記載の排湯熱利用システムは、前記熱源は、自然エネルギ（例えば、後述の太陽熱５Ａ）または機器の排熱（例えば、後述のコージェネレーションシステムの排熱５Ｂ、その他の機器の排熱５Ｃ）を含むことを特徴とする。   In the waste water heat utilization system according to claim 3, the heat source may be natural energy (for example, solar heat 5A described later) or exhaust heat of a device (for example, exhaust heat 5B of a cogeneration system described later, exhaust of other devices). Including heat 5C).

ここで、自然エネルギとしては、太陽熱や地熱が挙げられる。また、機器としては、コージェネレーションシステムが挙げられる。
この発明によれば、熱源として自然エネルギまたは機器の排熱を含む構成としたので、発熱コストが発生しないため、排湯熱利用システムの運転コストを削減できるうえに、環境負荷を低減できる。 Here, the natural energy includes solar heat and geothermal heat. Moreover, a cogeneration system is mentioned as an apparatus.
According to the present invention, since the heat source includes the natural energy or the exhaust heat of the equipment, no heat generation cost is generated, so that the operation cost of the waste water heat utilization system can be reduced and the environmental load can be reduced.

請求項４に記載の排湯熱利用システムは、前記熱利用手段は、前記排湯貯留槽の貯留水の上層側の熱を利用し、前記貯留水蓄熱手段は、前記排湯貯留槽の貯留水の下層側に蓄熱することを特徴とする。   The waste water heat utilization system according to claim 4, wherein the heat utilization means uses heat on an upper layer side of the stored water in the waste water storage tank, and the stored water heat storage means stores the waste water storage tank. It stores heat on the lower layer side of water.

排湯貯留槽内では、高温の水は比重が小さいため上層に移動し、低温の水は比重が大きいため下層に移動する。よって、貯留水の温度分布は、上層が高温で下層が低温となる。
そこで、この発明によれば、排湯貯留槽の上層側の貯留水の熱を利用したので、貯留水の高温部分と熱交換できるから、効率的に熱利用できる。
また、排湯貯留槽の下層側の貯留水に蓄熱したので、貯留水の低温部分と熱交換するから、貯留水と貯留水蓄熱手段の熱媒との温度差が大きくなり、効率的に熱交換できる。 In the hot water storage tank, high-temperature water moves to the upper layer because of its low specific gravity, and low-temperature water moves to the lower layer because of its high specific gravity. Therefore, the temperature distribution of the stored water is such that the upper layer is hot and the lower layer is cold.
Therefore, according to the present invention, since the heat of the stored water on the upper layer side of the hot water storage tank is used, heat can be efficiently exchanged with the high-temperature portion of the stored water.
In addition, since heat is stored in the stored water on the lower layer side of the hot water storage tank, heat is exchanged with the low temperature portion of the stored water, so the temperature difference between the stored water and the heat medium of the stored water heat storage means becomes large, and heat is efficiently generated. Can be exchanged.

請求項５に記載の排湯熱利用システムは、前記排湯貯留槽は、複数の槽（例えば、後述の第１排湯貯留槽４Ａ、第２排湯貯留槽４Ｂ）で構成されることを特徴とする。   In the waste water heat utilization system according to claim 5, the waste water storage tank is configured by a plurality of tanks (for example, a first waste water storage tank 4A and a second waste water storage tank 4B described later). Features.

この発明によれば、排湯貯留槽を複数の槽で構成したので、これら複数の槽を順番に使用することで、一定の貯水量を確保しながら、各槽を定期的に清掃できる。よって、各槽を衛生的に良好な状態に維持できるうえに、熱利用手段や貯留水蓄熱手段の熱交換効率が低下するのを防止できるうえに、排湯熱利用システムを停止させることなく連続して駆動できる。   According to this invention, since the hot water storage tank is composed of a plurality of tanks, each tank can be periodically cleaned while securing a certain amount of water storage by using the plurality of tanks in order. Therefore, each tank can be maintained in a sanitary and good condition, and the heat exchange efficiency of the heat utilization means and the stored water heat storage means can be prevented from decreasing, and the waste water heat utilization system can be continuously stopped without stopping. Can be driven.

請求項６に記載の排湯熱利用システムは、前記排湯貯留槽には、汚水配管が接続されていないことを特徴とする。   The waste water heat utilization system according to claim 6 is characterized in that a waste water pipe is not connected to the waste water storage tank.

この発明によれば、排湯貯留槽に汚水配管が接続されていないので、汚水が排湯貯留槽に流入しないから、排湯貯留槽内の排湯の温度低下を抑制できるうえに、熱利用手段や貯留水蓄熱手段の熱交換器や配管にごみが付着するのを抑制できる。   According to this invention, since the sewage pipe is not connected to the hot water storage tank, the sewage does not flow into the hot water storage tank, so that it is possible to suppress the temperature drop of the hot water in the hot water storage tank and use heat. It is possible to prevent dust from adhering to the heat exchanger and the piping of the means and the stored water heat storage means.

請求項７に記載の排湯熱利用システムは、前記排湯貯留槽内の貯留水は、当該排湯貯留槽の下部から排出されることを特徴とする。   The waste water heat utilization system according to claim 7 is characterized in that the stored water in the waste water storage tank is discharged from the lower part of the waste water storage tank.

この発明によれば、排湯貯留槽内の貯留水を排湯貯留槽の下部から排出した。上述のように、排湯貯留槽内では、貯留水の温度分布は、上層が高温で下層が低温となるから、排湯貯留槽の下層側の低温の貯留水を排出でき、貯留水の熱をより効率的に利用できるようになる。   According to this invention, the stored water in the hot water storage tank is discharged from the lower part of the hot water storage tank. As described above, in the hot water storage tank, the temperature distribution of the stored water is high in the upper layer and low in the lower layer. Therefore, the low temperature stored water on the lower side of the hot water storage tank can be discharged, and the heat of the stored water Can be used more efficiently.

本発明によれば、温水利用設備からの排湯を排湯貯留槽に貯留して、この貯留水の熱を利用した。温水利用設備からの排湯はある程度高温であるため、排湯の熱を効果的に利用できる。特に、温浴施設、宿泊施設、集合住宅、室内プール、食品工場などの給湯負荷の大きい施設では、一定量以上の排湯を安定的に得られるため、熱の利用効率が高くなる。さらに、熱源の熱を利用してこの貯留水に蓄熱したので、排湯が流れない時間帯であっても、熱源の熱を利用して排湯貯留槽内の貯留水を温めて、貯留水の水温の低下を防止できる。例えば太陽熱を熱源として利用した場合、熱源からの熱媒の温度は４０℃（冬季）〜１００℃（夏季）程度となる。以上のように、排湯の熱を回収して利用するだけではなく、熱源の熱も回収して利用する。これにより、貯留水の温度の低下を抑制できるだけでなく、貯留水の温度を上昇させることができるから、熱を効果的に利用できる。特に、上述の給湯負荷の大きい施設では、給湯用のエネルギ消費量を大幅に削減できることになる。   According to the present invention, the hot water from the hot water use facility is stored in the hot water storage tank, and the heat of the stored water is used. Since the hot water from the hot water use facility is hot to some extent, the heat of the hot water can be used effectively. In particular, in a hot water supply facility such as a hot bath facility, an accommodation facility, an apartment house, an indoor pool, and a food factory, a certain amount or more of hot water can be stably obtained, so that heat use efficiency is increased. Further, since the heat stored in the stored water is utilized using the heat of the heat source, the stored water in the waste water storage tank is warmed using the heat of the heat source even during a time zone when the hot water does not flow. Can prevent the water temperature from decreasing. For example, when solar heat is used as a heat source, the temperature of the heat medium from the heat source is about 40 ° C. (winter) to 100 ° C. (summer). As described above, not only the heat of the waste water is recovered and used, but also the heat of the heat source is recovered and used. Thereby, not only can the decrease in the temperature of the stored water be suppressed, but also the temperature of the stored water can be raised, so that heat can be used effectively. In particular, the energy consumption for hot water supply can be greatly reduced in the facility with a large hot water supply load described above.

本発明の一実施形態に係る排湯熱利用システムの構成を示す概略図である。It is the schematic which shows the structure of the hot water utilization system which concerns on one Embodiment of this invention. 前記実施形態に係る排湯熱利用システムの制御装置の構成を示すブロック図である。It is a block diagram which shows the structure of the control apparatus of the waste hot water utilization system which concerns on the said embodiment. 前記実施形態に係る排湯熱利用システムの動作を示す図（その１）である。It is a figure (the 1) which shows operation | movement of the hot water utilization system which concerns on the said embodiment. 前記実施形態に係る排湯熱利用システムの動作を示す図（その２）である。It is a figure (the 2) which shows operation | movement of the hot water utilization system which concerns on the said embodiment.

以下、本発明の一実施形態について、図面を参照しながら説明する。
図１は、本発明の一実施形態に係る排湯熱利用システムとしての給湯システム１の構成を示す概略図である。
給湯システム１は、厨房や風呂場などの温水利用設備としての給湯設備２と、ヒートポンプ３と、このヒートポンプ３から給湯設備２まで延びる設備給湯配管１０と、排湯貯留槽４と、給湯設備２から排湯貯留槽４まで延びる設備排湯配管２０と、排湯貯留槽４からヒートポンプ３まで延びるヒートポンプ熱源配管３０と、排湯貯留槽４から外部に延びる貯留槽排湯配管４０と、種々の熱源５と、これら熱源５から排湯貯留槽４まで延びる貯留槽熱源配管５０と、制御装置６０（図２参照）と、を備える。 Hereinafter, an embodiment 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 supply system 1 as a waste water heat utilization system according to an embodiment of the present invention.
A hot water supply system 1 includes a hot water supply facility 2 as a hot water use facility such as a kitchen and a bathroom, a heat pump 3, a facility hot water supply pipe 10 extending from the heat pump 3 to the hot water supply facility 2, an exhaust hot water storage tank 4, and a hot water supply facility 2. A facility hot water pipe 20 extending from the hot water storage tank 4 to the heat pump 3, a heat pump heat source pipe 30 extending from the hot water storage tank 4 to the heat pump 3, a storage tank hot water pipe 40 extending from the hot water storage tank 4 to the outside, The heat source 5, the storage tank heat source piping 50 extended from these heat sources 5 to the hot water storage tank 4, and the control apparatus 60 (refer FIG. 2) are provided.

排湯貯留槽４は、第１排湯貯留槽４Ａおよび第２排湯貯留槽４Ｂの２槽で構成され、断熱が施されている。また、排湯貯留槽４には、汚水配管が接続されていない。この排湯貯留槽４は、コンクリート躯体を利用して形成してもよいし、パネル製で形成してもよい。
第１排湯貯留槽４Ａには、第１排湯貯留槽４Ａの下部の温度を温度Ｔ１として検出する温度センサ６１Ａが設けられ、第２排湯貯留槽４Ｂには、第２排湯貯留槽４Ｂの下部の温度を温度Ｔ１として検出する温度センサ６１Ｂが設けられている。 The hot water storage tank 4 is composed of two tanks, a first hot water storage tank 4A and a second hot water storage tank 4B, and is insulated. Further, no sewage pipe is connected to the hot water storage tank 4. This hot water storage tank 4 may be formed using a concrete frame or may be formed from a panel.
The first Haiyu reservoir 4A, the temperature sensor 61A is provided for detecting the temperature of the lower portion of the first Haiyu reservoir 4A as the temperature T 1, the second Haiyu reservoir 4B, second Haiyu reservoir temperature sensor 61B are provided for detecting the temperature of the bottom of the vessel 4B as the temperature T 1.

ヒートポンプ３は、水熱源ヒートポンプであり、ヒートポンプ熱源配管３０内の熱媒から熱を回収して、この回収した熱で設備給湯配管１０内のお湯の温度を上昇させるものである。   The heat pump 3 is a water heat source heat pump, which recovers heat from the heat medium in the heat pump heat source pipe 30 and raises the temperature of hot water in the facility hot water supply pipe 10 with the recovered heat.

熱源５は、自然エネルギとしての太陽熱５Ａと、コージェネレーションシステムの排熱５Ｂと、その他の機器の排熱５Ｃと、で構成される。   The heat source 5 includes solar heat 5A as natural energy, exhaust heat 5B of a cogeneration system, and exhaust heat 5C of other equipment.

設備給湯配管１０は、温水が収容されており、ヒートポンプ３から給湯設備２に至る給湯管１１と、給湯設備２からヒートポンプ３に至る返湯管１２と、で構成される。返湯管１２には、循環ポンプ１３が設けられている。   The hot water supply pipe 10 accommodates hot water, and includes a hot water supply pipe 11 extending from the heat pump 3 to the hot water supply equipment 2 and a hot water return pipe 12 extending from the hot water supply equipment 2 to the heat pump 3. The return water pipe 12 is provided with a circulation pump 13.

設備排湯配管２０は、雑排水のみの単独排水である。この設備排湯配管２０は、給湯設備２から延びて分岐し、第１排湯貯留槽４Ａおよび第２排湯貯留槽４Ｂに至る。この設備排湯配管２０の分岐点の第１排湯貯留槽４Ａ側には、第１開閉バルブ２１Ａが設けられており、分岐点の第２排湯貯留槽４Ｂ側には、第２開閉バルブ２１Ｂが設けられている。
また、設備排湯配管２０の分岐点より上流側には、設備排湯配管２０内の温度を温度Ｔ２として検出する温度センサ６２が設けられている。 The facility hot water piping 20 is a single drainage of only miscellaneous drainage. This facility hot water piping 20 extends from the hot water supply facility 2 and branches to reach the first and second hot water storage tanks 4A and 4B. A first on-off valve 21A is provided on the side of the first hot water storage tank 4A at the branch point of the equipment hot water piping 20, and a second on-off valve is provided on the side of the second hot water storage tank 4B at the branch point. 21B is provided.
Further, on the upstream side than the branching point of the equipment Haiyu pipe 20, a temperature sensor 62 for detecting the temperature in the equipment Haiyu pipe 20 as temperature T 2 it is provided.

ヒートポンプ熱源配管３０は、熱媒が収容されており、第１排湯貯留槽４Ａの上部に設けられた第１吸熱コイル３１Ａと、第２排湯貯留槽４Ｂの上部に設けられた第２吸熱コイル３１Ｂと、第１吸熱コイル３１Ａおよび第２吸熱コイル３１Ｂから延びて合流しヒートポンプ３に至る送り管３２と、ヒートポンプ３から延びて分岐し第１吸熱コイル３１Ａおよび第２吸熱コイル３１Ｂに至る返り管３３と、を備える。   The heat pump heat source pipe 30 contains a heat medium, and includes a first heat absorption coil 31A provided in the upper part of the first waste water storage tank 4A and a second heat absorption provided in the upper part of the second waste water storage tank 4B. A coil 31B, a feed pipe 32 extending from the first heat absorption coil 31A and the second heat absorption coil 31B and joining to the heat pump 3, and a branch extending from the heat pump 3 to branch to the first heat absorption coil 31A and the second heat absorption coil 31B A tube 33.

送り管３２の合流点の第１吸熱コイル３１Ａ側には第１開閉バルブ３４Ａが設けられており、合流点の第２吸熱コイル３１Ｂ側には、第２開閉バルブ３４Ｂが設けられている。
返り管３３の分岐点の第１排湯貯留槽４Ａ側には第１開閉バルブ３５Ａが設けられており、分岐点の第２排湯貯留槽４Ｂ側には、第２開閉バルブ３５Ｂが設けられている。
また、返り管３３には、循環ポンプ３６が設けられている。 A first opening / closing valve 34A is provided on the first heat absorption coil 31A side of the joining point of the feed pipe 32, and a second opening / closing valve 34B is provided on the second heat absorption coil 31B side of the joining point.
A first opening / closing valve 35A is provided on the branch point of the return pipe 33 on the first waste hot water storage tank 4A side, and a second opening / closing valve 35B is provided on the branch point on the second waste hot water storage tank 4B side. ing.
The return pipe 33 is provided with a circulation pump 36.

貯留槽排湯配管４０は、第１排湯貯留槽４Ａの下部および第２排湯貯留槽４Ｂの下部から延びて合流し外部に至る。この貯留槽排湯配管４０の第１排湯貯留槽４Ａ側の端部には、第１ポンプ４１Ａが設けられ、第２排湯貯留槽４Ｂ側の端部には、第２ポンプ４１Ｂが設けられている。すなわち、ポンプ４１Ａは、排湯貯留槽４Ａの下部に設置され、ポンプ４１Ｂは、排湯貯留槽４Ｂの下部に設置される。
貯留槽排湯配管４０の合流点より下流側の部分と、上述の設備排湯配管２０の分岐点より上流側の部分とは、バイパス管４２で接続されている。このバイパス管４２には、第３開閉バルブ４３が設けられている。 The storage tank drain pipe 40 extends from the lower part of the first waste hot water storage tank 4A and the lower part of the second waste hot water storage tank 4B to reach the outside. A first pump 41A is provided at the end of the storage tank drain pipe 40 on the first waste hot water storage tank 4A side, and a second pump 41B is provided at the end of the second waste water storage tank 4B side. It has been. That is, the pump 41A is installed in the lower part of the hot water storage tank 4A, and the pump 41B is installed in the lower part of the hot water storage tank 4B.
A portion on the downstream side from the junction of the storage tank drain pipe 40 and a portion on the upstream side from the branch point of the above-described facility drain pipe 20 are connected by a bypass pipe 42. The bypass pipe 42 is provided with a third opening / closing valve 43.

貯留槽熱源配管５０は、熱媒が収容されており、第１排湯貯留槽４Ａの下部に設けられた第１放熱コイル５１Ａと、第２排湯貯留槽４Ｂの下部に設けられた第２放熱コイル５１Ｂと、熱源５から延びて分岐し第１放熱コイル５１Ａおよび第２放熱コイル５１Ｂに至る送り管５２と、第１放熱コイル５１Ａおよび第２放熱コイル５１Ｂから延びて合流し熱源５に至る返り管５３と、を備える。   The storage tank heat source pipe 50 contains a heat medium, and includes a first heat dissipating coil 51A provided in the lower part of the first waste hot water storage tank 4A and a second provided in the lower part of the second hot water storage tank 4B. The heat radiation coil 51B extends from the heat source 5 and branches to the first heat radiation coil 51A and the second heat radiation coil 51B, and extends from the first heat radiation coil 51A and the second heat radiation coil 51B to join and reach the heat source 5. A return pipe 53.

送り管５２の分岐点の第１放熱コイル５１Ａ側には第１開閉バルブ５４Ａが設けられており、分岐点の第２放熱コイル５１Ｂ側には、第２開閉バルブ５４Ｂが設けられている。
また、送り管５２の分岐点より上流側には、送り管５２内の温度を温度Ｔ３として検出する温度センサ６３が設けられている。
返り管５３の合流点の第１放熱コイル５１Ａ側には第１開閉バルブ５５Ａが設けられており、合流点の第２放熱コイル５１Ｂ側には、第２開閉バルブ５５Ｂが設けられている。また、返り管５３には、循環ポンプ５６が設けられている。 A first opening / closing valve 54A is provided on the first radiating coil 51A side of the branch point of the feed pipe 52, and a second opening / closing valve 54B is provided on the second radiating coil 51B side of the branch point.
Further, a temperature sensor 63 that detects the temperature in the feed pipe 52 as a temperature T 3 is provided upstream of the branch point of the feed pipe 52.
A first on-off valve 55A is provided on the first radiating coil 51A side of the junction of the return pipe 53, and a second on-off valve 55B is provided on the second radiating coil 51B side of the merging point. The return pipe 53 is provided with a circulation pump 56.

図２は、制御装置６０の構成を示すブロック図である。
上述の第１開閉バルブ２１Ａ、３４Ａ、３５Ａ、５４Ａ、５５Ａ、第２開閉バルブ２１Ｂ、３４Ｂ、３５Ｂ、５４Ｂ、５５Ｂ、第３開閉バルブ４３、ポンプ１３、３６、４１Ａ、４１Ｂ、５６、および温度センサ６１Ａ、６１Ｂ、６２、６３は、制御装置６０に接続される。 FIG. 2 is a block diagram illustrating a configuration of the control device 60.
First on-off valve 21A, 34A, 35A, 54A, 55A, second on-off valve 21B, 34B, 35B, 54B, 55B, third on-off valve 43, pumps 13, 36, 41A, 41B, 56, and temperature sensor 61A, 61B, 62, 63 are connected to the control device 60.

制御装置６０は、給湯部６４と、貯留水蓄熱部６５と、貯留水排出部６６と、排湯貯留部６７と、排湯排出部６８と、を備える。   The control device 60 includes a hot water supply unit 64, a stored water heat storage unit 65, a stored water discharge unit 66, a hot water storage unit 67, and a hot water discharge unit 68.

給湯部６４は、排湯貯留槽４Ａ、４Ｂ内の貯留水の上層側の熱を利用して、給湯設備２に温水を供給する。
具体的は、給湯部６４は、排湯貯留槽４Ａ、４Ｂとヒートポンプ３との間で熱媒を循環させて、ヒートポンプ３に高温の熱媒を供給するとともに、ヒートポンプ３を駆動して、給湯設備２に供給する水を温める。
そして循環ポンプ１３を駆動して、ヒートポンプ３、給湯管１１、給湯設備２、返湯管１２の順にお湯を循環させて、給湯設備２に温水を供給する。 The hot water supply unit 64 supplies hot water to the hot water supply facility 2 using the heat on the upper layer side of the stored water in the hot water storage tanks 4A and 4B.
Specifically, the hot water supply unit 64 circulates a heat medium between the hot water storage tanks 4A and 4B and the heat pump 3, supplies a high temperature heat medium to the heat pump 3, and drives the heat pump 3 to supply hot water. Warm the water supplied to the facility 2.
Then, the circulation pump 13 is driven to circulate hot water in the order of the heat pump 3, the hot water supply pipe 11, the hot water supply equipment 2, and the hot water return pipe 12, thereby supplying hot water to the hot water supply equipment 2.

具体的には、給湯部６４は、第１排湯貯留槽４Ａが選択されている場合には、第１開閉バルブ３４Ａ、３５Ａを開いて、第２開閉バルブ３４Ｂ、３５Ｂを閉じておく。一方、第２排湯貯留槽４Ｂが選択されている場合には、第１開閉バルブ３４Ａ、３５Ａを閉じて、第２開閉バルブ３４Ｂ、３５Ｂを開いておく。
そしてこの状態で、循環ポンプ３６を駆動して、ヒートポンプ熱源配管３０内の熱媒を、吸熱コイル３１Ａ、３１Ｂ、送り管３２、ヒートポンプ３、返り管３３の順に循環させる。すると熱媒は、吸熱コイル３１Ａ、３１Ｂにて排湯貯留槽４Ａ、４Ｂ内の貯留水から吸熱し、その後、送り管３２を通ってヒートポンプ３に至る。そしてこの熱媒は、ヒートポンプ３にて放熱し、返り管３３を通って、吸熱コイル３１Ａ、３１Ｂに戻る。 Specifically, when the first hot water storage tank 4A is selected, the hot water supply unit 64 opens the first opening / closing valves 34A, 35A and closes the second opening / closing valves 34B, 35B. On the other hand, when the second hot water storage tank 4B is selected, the first opening / closing valves 34A, 35A are closed and the second opening / closing valves 34B, 35B are opened.
In this state, the circulation pump 36 is driven to circulate the heat medium in the heat pump heat source pipe 30 in the order of the heat absorption coils 31A, 31B, the feed pipe 32, the heat pump 3, and the return pipe 33. Then, the heat medium absorbs heat from the stored water in the hot water storage tanks 4A and 4B by the heat absorption coils 31A and 31B, and then reaches the heat pump 3 through the feed pipe 32. The heat medium radiates heat at the heat pump 3, passes through the return pipe 33, and returns to the heat absorption coils 31A and 31B.

貯留水蓄熱部６５は、熱源５の熱を利用して、排湯貯留槽４Ａ、４Ｂ内の貯留水の下層側に蓄熱する。
具体的には、貯留水蓄熱部６５は、第１排湯貯留槽４Ａが選択されている場合には、第１開閉バルブ５４Ａ、５５Ａを開いて、第２開閉バルブ５４Ｂ、５５Ｂを閉じておく。一方、第２排湯貯留槽４Ｂが選択されている場合には、第１開閉バルブ５４Ａ、５５Ａを閉じて、第２開閉バルブ５４Ｂ、５５Ｂを開いておく。そしてこの状態で、循環ポンプ５６を駆動する。
そしてこの状態で、循環ポンプ５６を駆動して、貯留槽熱源配管５０内の熱媒を、熱源５、送り管５２、放熱コイル５１Ａ、５１Ｂ、返り管５３の順に循環させる。すると熱媒は、熱源５にて吸熱し、送り管５２を通って放熱コイル５１Ａ、５１Ｂに至る。そしてこの熱媒は、放熱コイル５１Ａ、５１Ｂにて排湯貯留槽４Ａ、４Ｂ内の貯留水に放熱して、返り管５３を通って、熱源５に戻る。 The stored water heat storage unit 65 uses the heat of the heat source 5 to store heat on the lower layer side of the stored water in the hot water storage tanks 4A and 4B.
Specifically, the stored water heat storage unit 65 opens the first opening / closing valves 54A, 55A and closes the second opening / closing valves 54B, 55B when the first waste hot water storage tank 4A is selected. . On the other hand, when the second hot water storage tank 4B is selected, the first opening / closing valves 54A, 55A are closed and the second opening / closing valves 54B, 55B are opened. In this state, the circulation pump 56 is driven.
In this state, the circulation pump 56 is driven to circulate the heat medium in the storage tank heat source pipe 50 in the order of the heat source 5, the feed pipe 52, the heat radiating coils 51A and 51B, and the return pipe 53. Then, the heat medium absorbs heat at the heat source 5, passes through the feed pipe 52, and reaches the heat radiating coils 51 </ b> A and 51 </ b> B. The heat medium radiates heat to the stored water in the hot water storage tanks 4A and 4B by the heat radiating coils 51A and 51B, and returns to the heat source 5 through the return pipe 53.

貯留水排出部６６は、排湯貯留槽４Ａ、４Ｂ内の貯留水を外部に排出する。
具体的には、貯留水排出部６６は、第１排湯貯留槽４Ａが選択されている場合には、第１ポンプ４１Ａを駆動し、第２排湯貯留槽４Ｂが選択されている場合には、第２ポンプ４１Ｂを駆動する。これにより、排湯貯留槽４Ａ、４Ｂ内の貯留水は、貯留槽排湯配管４０を通って、外部に排出される。 The stored water discharge unit 66 discharges the stored water in the hot water storage tanks 4A and 4B to the outside.
Specifically, the stored water discharge unit 66 drives the first pump 41A when the first waste hot water storage tank 4A is selected, and the second hot water storage tank 4B is selected. Drives the second pump 41B. Thereby, the stored water in the hot water storage tanks 4A and 4B is discharged to the outside through the storage tank hot water piping 40.

排湯貯留部６７は、給湯設備２からの排湯を排湯貯留槽４Ａ、４Ｂに貯留する。
具体的には、排湯貯留部６７は、第１排湯貯留槽４Ａが選択されている場合には、第１開閉バルブ２１Ａを開いて、第２開閉バルブ２１Ｂおよび第３開閉バルブ４３を閉じる。一方、第２排湯貯留槽４Ｂが選択されている場合には、第１開閉バルブ２１Ａおよび第３開閉バルブ４３を閉じて、第２開閉バルブ２１Ｂを開く。これにより、給湯設備２からの排湯は、設備排湯配管２０を通って、第１排湯貯留槽４Ａまたは第２排湯貯留槽４Ｂに選択的に貯留される。 The hot water storage unit 67 stores the hot water from the hot water supply facility 2 in the hot water storage tanks 4A and 4B.
Specifically, the hot water storage section 67 opens the first on-off valve 21A and closes the second on-off valve 21B and the third on-off valve 43 when the first hot water storage tank 4A is selected. . On the other hand, when the second hot water storage tank 4B is selected, the first opening / closing valve 21A and the third opening / closing valve 43 are closed, and the second opening / closing valve 21B is opened. Accordingly, the hot water from the hot water supply facility 2 is selectively stored in the first hot water storage tank 4A or the second hot water storage tank 4B through the equipment hot water piping 20.

排湯排出部６８は、給湯設備２からの排湯を外部に排出する。
具体的には、排湯排出部６８は、第１開閉バルブ２１Ａおよび第２開閉バルブ２１Ｂを閉じて、第３開閉バルブ４３を開く。これにより、給湯設備２からの排湯は、設備排湯配管２０およびバイパス管４２を通って、外部に排出される。 The hot water discharge unit 68 discharges the hot water from the hot water supply facility 2 to the outside.
Specifically, the hot water discharge unit 68 closes the first on-off valve 21A and the second on-off valve 21B and opens the third on-off valve 43. Thus, the hot water from the hot water supply facility 2 is discharged to the outside through the facility hot water piping 20 and the bypass pipe 42.

以上の制御装置６０は、以下のように動作する。
まず、給湯部６４により、給湯設備２に温水を供給する。
さらに、制御装置６０は、実際に排湯を貯留する貯留槽として、第１排湯貯留槽４Ａまたは第２排湯貯留槽４Ｂを選択する。なお、タイマーあるいは手動で、選択する貯留槽を切り替える。 The above control device 60 operates as follows.
First, hot water is supplied to the hot water supply facility 2 by the hot water supply unit 64.
Furthermore, the control device 60 selects the first hot water storage tank 4A or the second hot water storage tank 4B as a storage tank that actually stores the hot water. In addition, the storage tank to be selected is switched by a timer or manually.

また、制御装置６０は、設備排湯配管２０内に排湯が流れた場合、温度Ｔ１、温度Ｔ２、温度Ｔ３を比較する。
ここで、排湯の温度Ｔ２は、３０℃〜４０℃程度である。また、貯留槽熱源配管５０の熱媒の温度Ｔ３は、太陽光を利用した場合、４０℃（冬季）〜１００℃（夏季）程度となる。 Moreover, the control device 60 compares the temperature T 1 , the temperature T 2 , and the temperature T 3 when the hot water flows into the facility hot water pipe 20.
Here, the temperature T 2 of the Haiyu is 30 ° C. to 40 ° C. approximately. Further, the temperature T 3 of the heat medium storage tank heat pipe 50 is that when utilizing sunlight, the 40 ° C. (in winter) to 100 ° C. (summer) degree.

温度Ｔ２が最も高い場合、排湯貯留部６７により、温度の高い排湯を排湯貯留槽４内の貯留水に加える。同時に、貯留水排出部６６により、排湯貯留槽４の貯留水の水位を一定に保持するため、排湯貯留槽４Ａ、４Ｂの下部の低温部分から排水する。 When the temperature T 2 is the highest, the hot water storage section 67 adds hot hot water to the stored water in the hot water storage tank 4. At the same time, the stored water discharge unit 66 drains from the lower temperature portion of the hot water storage tanks 4A and 4B in order to keep the water level of the stored hot water storage tank 4 constant.

つまり、図３に示すように、吸熱コイル３１Ａ、３１Ｂにて、ヒートポンプ熱源配管３０内の熱媒が排湯貯留槽４Ａ、４Ｂ内の貯留水から吸熱し、送り管３２を通ってヒートポンプ３に送られる。
また、給湯設備２からの排湯は、設備排湯配管２０を通って、排湯貯留槽４Ａ、４Ｂに貯留される。同時に、ポンプ４１Ａ、４１Ｂを駆動し、排湯貯留槽４Ａ、４Ｂ内の貯留水は、貯留槽排湯配管４０を通して、外部に排出される。 That is, as shown in FIG. 3, the heat medium in the heat pump heat source pipe 30 absorbs heat from the stored water in the hot water storage tanks 4 </ b> A and 4 </ b> B by the heat absorption coils 31 </ b> A and 31 </ b> B and passes through the feed pipe 32 to the heat pump 3. Sent.
Moreover, the hot water from the hot water supply equipment 2 passes through the equipment hot water piping 20 and is stored in the hot water storage tanks 4A and 4B. At the same time, the pumps 41 </ b> A and 41 </ b> B are driven, and the stored water in the hot water storage tanks 4 </ b> A and 4 </ b> B is discharged to the outside through the storage tank hot water piping 40.

一方、温度Ｔ３が高い場合には、貯留水蓄熱部６５により、排湯貯留槽４Ａ、４Ｂの貯留水の蓄熱量を増大させる。これは、給湯設備２からの排湯を排湯貯留槽４に加えるよりも、排湯貯留槽４内の排湯と放熱コイル５１Ａ、５１Ｂとで熱交換する方が、貯留水を温めることができるからである。また、排湯排出部６８により、設備排湯配管２０内の排湯を外部に排出する。 On the other hand, if the temperature T 3 higher, the accumulated water heat storage unit 65, Haiyu reservoir 4A, increasing the amount of heat stored water stored 4B. This is because the heat exchange between the hot water in the hot water storage tank 4 and the radiating coils 51A and 51B heats the stored water rather than adding the hot water from the hot water supply facility 2 to the hot water storage tank 4. Because it can. Further, the hot water discharger 68 discharges the hot water in the equipment hot water pipe 20 to the outside.

つまり、図４に示すように、吸熱コイル３１Ａ、３１Ｂにて、ヒートポンプ熱源配管３０内の熱媒が排湯貯留槽４Ａ、４Ｂ内の貯留水から吸熱し、送り管３２を通ってヒートポンプ３に送られる。
また、循環ポンプ５６が駆動して、熱源５から送り管５２を通って、貯留槽熱源配管５０内の熱媒が放熱コイル５１Ａ、５１Ｂに送られる。この熱媒は放熱コイル５１Ａ、５１Ｂにて排湯貯留槽４Ａ、４Ｂ内の貯留水に放熱し、返り管５３を通って熱源５に戻る。 That is, as shown in FIG. 4, the heat medium in the heat pump heat source pipe 30 absorbs heat from the stored water in the hot water storage tanks 4 </ b> A and 4 </ b> B by the heat absorption coils 31 </ b> A and 31 </ b> B and passes through the feed pipe 32 to the heat pump 3. Sent.
Further, the circulation pump 56 is driven, and the heat medium in the storage tank heat source pipe 50 is sent from the heat source 5 to the heat radiating coils 51A and 51B through the feed pipe 52. The heat medium radiates heat to the stored water in the hot water storage tanks 4A and 4B by the heat radiating coils 51A and 51B, and returns to the heat source 5 through the return pipe 53.

また、制御装置６０は、設備排湯配管２０内に排湯が流れていない場合、温度Ｔ１、温度Ｔ３を比較し、温度Ｔ３が高い場合には、貯留水蓄熱部６５により、排湯貯留槽４Ａ、４Ｂの貯留水の蓄熱量を増大させる。 Further, the control device 60 compares the temperature T 1 and the temperature T 3 when no hot water is flowing into the facility hot water pipe 20. When the temperature T 3 is high, the control device 60 causes the stored water heat storage unit 65 to discharge the hot water. The amount of heat stored in the hot water storage tanks 4A and 4B is increased.

本実施形態によれば、以下のような効果がある。
（１）給湯設備２からの排湯を排湯貯留槽４Ａ、４Ｂに貯留して、この貯留水の熱を利用した。給湯設備２からの排湯はある程度高温であるため、排湯の熱を効果的に利用できる。特に、温浴施設、宿泊施設、集合住宅、室内プール、食品工場などの給湯負荷の大きい施設では、一定量以上の排湯を安定的に得られるため、熱の利用効率が高くなる。 According to this embodiment, there are the following effects.
(1) The hot water from the hot water supply facility 2 was stored in the hot water storage tanks 4A and 4B, and the heat of the stored water was used. Since the hot water from the hot water supply facility 2 is hot to some extent, the heat of the hot water can be used effectively. In particular, in a hot water supply facility such as a hot bath facility, an accommodation facility, an apartment house, an indoor pool, and a food factory, a certain amount or more of hot water can be stably obtained, so that heat use efficiency is increased.

さらに、熱源５の熱を利用してこの貯留水に蓄熱したので、排湯が流れない時間帯であっても、熱源５の熱を利用して排湯貯留槽４Ａ、４Ｂ内の貯留水を温めて、貯留水の水温の低下を防止できる。例えば太陽熱を熱源として利用した場合、貯留槽熱源配管５０内の熱媒の温度は４０℃（冬季）〜１００℃（夏季）程度となる。   Further, since the stored water is stored in the stored water using the heat of the heat source 5, the stored water in the discharged hot water storage tanks 4A and 4B is used using the heat of the heat source 5 even in a time zone in which the discharged hot water does not flow. It can be warmed to prevent a decrease in the temperature of the stored water. For example, when solar heat is used as a heat source, the temperature of the heat medium in the storage tank heat source pipe 50 is about 40 ° C. (winter) to 100 ° C. (summer).

以上のように、排湯の熱を回収して利用するだけではなく、熱源５の熱も回収して利用する。これにより、貯留水の温度の低下を抑制できるだけでなく、貯留水の温度を上昇させることができるから、熱を効果的に利用できる。特に、上述の給湯負荷の大きい施設では、給湯用のエネルギ消費量を大幅に削減できることになる。   As described above, not only the heat of the waste water is recovered and used, but also the heat of the heat source 5 is recovered and used. Thereby, not only can the decrease in the temperature of the stored water be suppressed, but also the temperature of the stored water can be raised, so that heat can be used effectively. In particular, the energy consumption for hot water supply can be greatly reduced in the facility with a large hot water supply load described above.

（２）給湯設備２に給湯する水熱源ヒートポンプ３を設けた。給湯設備２からの排湯の温度は３０℃〜４０℃程度であり、熱源としてはさほど高温ではないが、水熱源ヒートポンプ３の熱源として十分に利用できるため、排湯の熱を効率的に利用できる。
また、水熱源ヒートポンプ３では、ヒートポンプ熱源配管３０内の熱媒に排湯の熱を吸熱させ、この熱媒に放熱させて設備給湯配管１０内のお湯を温める。よって、排湯の熱で設備給湯配管を直接温める場合と異なり、熱媒が収容されたヒートポンプ熱源配管３０が破損しても、クロスコネクションが発生するのを防止できる。 (2) A water heat source heat pump 3 for supplying hot water to the hot water supply facility 2 is provided. The temperature of the hot water from the hot water supply facility 2 is about 30 ° C. to 40 ° C., and it is not so hot as a heat source, but it can be used sufficiently as a heat source for the water heat source heat pump 3, so the heat of the hot water is used efficiently. it can.
Further, in the water heat source heat pump 3, the heat medium in the heat pump heat source pipe 30 absorbs the heat of the hot water, and the heat medium dissipates heat to warm the hot water in the facility hot water supply pipe 10. Therefore, unlike the case where the facility hot water supply pipe is directly heated by the heat of the waste water, it is possible to prevent the occurrence of cross connection even if the heat pump heat source pipe 30 in which the heat medium is accommodated is damaged.

（３）熱源５として太陽熱５Ａおよび機器の排熱５Ｂ、５Ｃを含む構成としたので、発熱コストが発生しないため、排湯熱利用システムの運転コストを削減できるうえに、環境負荷を低減できる。   (3) Since the heat source 5 includes the solar heat 5A and the exhaust heat 5B and 5C of the equipment, no heat generation cost is generated, so that the operating cost of the waste water heat utilization system can be reduced and the environmental load can be reduced.

（４）排湯貯留槽４Ａ，４Ｂの貯留水の上層側の熱を利用したので、ヒートポンプ熱源配管３０の吸熱コイル３１Ａ、３１Ｂが貯留水の高温部分と熱交換できるから、効率的に熱利用できる。
また、排湯貯留槽の貯留水の下層側に蓄熱したので、貯留槽熱源配管５０の放熱コイル５１Ａ、５１Ｂが貯留水の低温部分と熱交換するから、貯留水と貯留水蓄熱手段の熱媒との温度差が大きくなり、効率的に熱交換できる。 (4) Since the heat on the upper layer side of the stored water in the hot water storage tanks 4A and 4B is used, the heat absorption coils 31A and 31B of the heat pump heat source pipe 30 can exchange heat with the high temperature portion of the stored water, so that heat is efficiently used. it can.
Further, since heat is stored in the lower layer side of the stored water in the waste water storage tank, the heat radiation coils 51A and 51B of the storage tank heat source pipe 50 exchange heat with the low temperature portion of the stored water. The temperature difference between the two becomes large and heat can be exchanged efficiently.

（５）排湯貯留槽４を２つの槽、すなわち第１排湯貯留槽４Ａおよび第２排湯貯留槽４Ｂで構成したので、これら２つの排湯貯留槽４Ａ、４Ｂを交互に使用することで、一定の貯水量を確保しながら、各排湯貯留槽４Ａ、４Ｂを定期的に清掃できる。よって、各排湯貯留槽４Ａ、４Ｂを衛生的に良好な状態に維持できるうえに、ヒートポンプ熱源配管３０の吸熱コイル３１Ａ、３１Ｂや貯留槽熱源配管５０の放熱コイル５１Ａ、５１Ｂの熱交換効率が低下するのを防止できるうえに、本給湯システム１を停止させることなく連続して駆動できる。   (5) Since the hot water storage tank 4 is composed of two tanks, that is, the first hot water storage tank 4A and the second hot water storage tank 4B, these two hot water storage tanks 4A and 4B should be used alternately. Thus, each of the hot water storage tanks 4A and 4B can be periodically cleaned while ensuring a certain amount of stored water. Accordingly, each of the hot water storage tanks 4A and 4B can be maintained in a sanitary and good condition, and the heat exchange efficiency of the heat absorption coils 31A and 31B of the heat pump heat source pipe 30 and the heat dissipation coils 51A and 51B of the storage tank heat source pipe 50 can be improved. In addition to being able to prevent the decrease, the hot water supply system 1 can be continuously driven without being stopped.

（６）排湯貯留槽４Ａ、４Ｂに汚水配管が接続されていないので、汚水が排湯貯留槽４Ａ、４Ｂに流入しないから、排湯貯留槽４Ａ、４Ｂ内の排湯の温度低下を抑制できるうえに、ヒートポンプ熱源配管３０や貯留槽熱源配管５０にごみが付着するのを抑制できる。   (6) Since no sewage pipe is connected to the hot water storage tanks 4A and 4B, the sewage does not flow into the hot water storage tanks 4A and 4B, so that the temperature drop of the hot water in the hot water storage tanks 4A and 4B is suppressed. In addition, it is possible to suppress dust from adhering to the heat pump heat source pipe 30 and the storage tank heat source pipe 50.

（７）排湯貯留槽４Ａ、４Ｂ内の貯留水を排湯貯留槽４Ａ、４Ｂの下部から排出した。上述のように、排湯貯留槽４Ａ、４Ｂ内では、高温の水は比重が小さいため上層に移動し、低温の水は比重が大きいため下層に移動する。よって、貯留水の温度分布は、上層が高温で下層が低温となるから、排湯貯留槽４Ａ、４Ｂの下層側の低温の貯留水を効率よく排出でき、貯留水の熱をより効率的に利用できるようになる。   (7) The stored water in the hot water storage tanks 4A and 4B was discharged from the lower part of the hot water storage tanks 4A and 4B. As described above, in the hot water storage tanks 4A and 4B, the high-temperature water moves to the upper layer because the specific gravity is small, and the low-temperature water moves to the lower layer because the specific gravity is large. Therefore, since the temperature distribution of the stored water is high in the upper layer and low in the lower layer, the low-temperature stored water on the lower layer side of the hot water storage tanks 4A and 4B can be discharged efficiently, and the heat of the stored water is more efficiently generated. It becomes available.

なお、本発明は前記実施形態に限定されるものではなく、本発明の目的を達成できる範囲での変形、改良等は本発明に含まれるものである。
例えば、本実施形態では、排湯貯留槽４を２槽で構成したが、これに限らず、３槽以上で構成してもよい。
また、本実施形態では、ポンプ４１Ａ、４１Ｂを用いて、排湯貯留槽４Ａ、４Ｂから排水したが、これに限らず、ポンプを設けずに自然流下としてもよい。この場合、排湯貯留槽４Ａ、４Ｂの下部から延びる貯留槽排湯配管４０に電動弁を取り付け、この電動弁を貯留水排出部６６により駆動して排水する。 It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.
For example, in the present embodiment, the hot water storage tank 4 is configured with two tanks, but is not limited thereto, and may be configured with three or more tanks.
Moreover, in this embodiment, it drained from the hot water storage tanks 4A and 4B using the pumps 41A and 41B. However, the present invention is not limited to this, and a natural flow may be provided without providing a pump. In this case, an electric valve is attached to the storage tank drainage pipe 40 extending from the lower part of the hot water storage tanks 4 </ b> A, 4 </ b> B, and the motorized valve is driven by the stored water discharge unit 66 to drain the water.

１…給湯システム（排湯熱利用システム）
２…給湯設備（温水利用設備）
３…ヒートポンプ（熱利用手段）
４…排湯貯留槽
４Ａ…第１排湯貯留槽
４Ｂ…第２排湯貯留槽
５…熱源
５Ａ…太陽熱（自然エネルギ）
５Ｂ…コージェネレーションシステムの排熱
５Ｃ…その他の機器の排熱
１０…設備給湯配管（熱利用手段）
１１…給湯管
１２…返湯管
１３…循環ポンプ（熱利用手段）
２０…設備排湯配管（排湯貯留手段）
２１Ａ…第１開閉バルブ（排湯貯留手段）
２１Ｂ…第２開閉バルブ（排湯貯留手段）
３０…ヒートポンプ熱源配管（熱利用手段）
３１Ａ…第１吸熱コイル
３１Ｂ…第２吸熱コイル
３２…送り管
３３…返り管
３４Ａ…第１開閉バルブ（熱利用手段）
３４Ｂ…第２開閉バルブ（熱利用手段）
３５Ａ…第１開閉バルブ（熱利用手段）
３５Ｂ…第２開閉バルブ（熱利用手段）
３６…循環ポンプ（熱利用手段）
４０…貯留槽排湯配管
４１Ａ…第１ポンプ
４１Ｂ…第２ポンプ
４２…バイパス管
４３…第３開閉バルブ
５０…貯留槽熱源配管（貯留水蓄熱手段）
５１Ａ…第１放熱コイル
５１Ｂ…第２放熱コイル
５２…送り管
５３…返り管
５４Ａ…第１開閉バルブ（貯留水蓄熱手段）
５４Ｂ…第２開閉バルブ（貯留水蓄熱手段）
５５Ａ…第１開閉バルブ（貯留水蓄熱手段）
５５Ｂ…第２開閉バルブ（貯留水蓄熱手段）
５６…循環ポンプ（貯留水蓄熱手段）
６０…制御装置
６１Ａ…温度センサ
６１Ｂ…温度センサ
６２…温度センサ
６３…温度センサ
６４…給湯部（熱利用手段）
６５…貯留水蓄熱部（貯留水蓄熱手段）
６６…貯留水排出部
６７…排湯貯留部（排湯貯留手段）
６８…排湯排出部 1 ... Hot water supply system (waste water heat utilization system)
2 ... Hot water supply equipment (hot water use equipment)
3. Heat pump (heat utilization means)
DESCRIPTION OF SYMBOLS 4 ... Waste hot water storage tank 4A ... 1st hot water storage tank 4B ... 2nd hot water storage tank 5 ... Heat source 5A ... Solar heat (natural energy)
5B ... Waste heat of cogeneration system 5C ... Waste heat of other equipment 10 ... Equipment hot water supply piping (heat utilization means)
11 ... Hot water supply pipe 12 ... Return hot water pipe 13 ... Circulation pump (heat utilization means)
20 ... Equipment hot water piping (waste water storage means)
21A ... First open / close valve (exhaust water storage means)
21B ... Second open / close valve (hot water storage means)
30 ... Heat pump heat source piping (heat utilization means)
31A ... 1st heat absorption coil 31B ... 2nd heat absorption coil 32 ... Feed pipe 33 ... Return pipe 34A ... 1st on-off valve (heat utilization means)
34B ... Second on-off valve (heat utilization means)
35A ... 1st on-off valve (heat utilization means)
35B ... Second on-off valve (heat utilization means)
36 ... circulation pump (heat utilization means)
DESCRIPTION OF SYMBOLS 40 ... Reservoir drain water piping 41A ... 1st pump 41B ... 2nd pump 42 ... Bypass pipe 43 ... 3rd opening-and-closing valve 50 ... Reservoir heat source piping (reserved water heat storage means)
51A ... 1st heat radiating coil 51B ... 2nd heat radiating coil 52 ... Feed pipe 53 ... Return pipe 54A ... 1st on-off valve (storage water thermal storage means)
54B ... Second on-off valve (reserved water heat storage means)
55A ... First open / close valve (reserved water heat storage means)
55B ... Second open / close valve (reserved water heat storage means)
56. Circulation pump (storage water heat storage means)
60 ... Control device 61A ... Temperature sensor 61B ... Temperature sensor 62 ... Temperature sensor 63 ... Temperature sensor 64 ... Hot water supply section (heat utilization means)
65 ... Reserved water heat storage part (Reserved water heat storage means)
66 ... Reserved water discharge part 67 ... Hot water storage part (waste water storage means)
68 ... Waste water discharge section

Claims (7)

温水利用設備と、
排湯貯留槽と、
前記温水利用設備からの排湯を前記排湯貯留槽に貯留する排湯貯留手段と、
前記排湯貯留槽内の貯留水の熱を利用する熱利用手段と、
熱源と、
当該熱源の熱を利用して前記排湯貯留槽内の貯留水に蓄熱する貯留水蓄熱手段と、を備えることを特徴とする排湯熱利用システム。 Hot water use facilities,
A hot water storage tank,
A hot water storage means for storing the hot water from the hot water use facility in the hot water storage tank;
Heat utilization means for utilizing the heat of the stored water in the waste water storage tank;
A heat source,
And a stored water heat storage means for storing heat in the stored water in the waste water storage tank using the heat of the heat source. 前記熱利用手段は、前記温水利用設備に給湯する水熱源ヒートポンプを含むことを特徴とする請求項１に記載の排湯熱利用システム。   The waste heat utilization system according to claim 1, wherein the heat utilization means includes a water heat source heat pump that supplies hot water to the hot water utilization facility. 前記熱源は、自然エネルギまたは機器の排熱を含むことを特徴とする請求項１または２に記載の排湯熱利用システム。   The waste heat utilization system according to claim 1 or 2, wherein the heat source includes natural energy or waste heat of equipment. 前記熱利用手段は、前記排湯貯留槽の貯留水の上層側の熱を利用し、
前記貯留水蓄熱手段は、前記排湯貯留槽の貯留水の下層側に蓄熱することを特徴とする請求項１から３のいずれかに記載の排湯熱利用システム。 The heat utilization means utilizes the heat on the upper layer side of the stored water in the hot water storage tank,
The waste water heat utilization system according to any one of claims 1 to 3, wherein the stored water heat storage means stores heat in a lower layer side of the stored water in the waste water storage tank. 前記排湯貯留槽は、複数の槽で構成されることを特徴とする請求項１から４のいずれかに記載の排湯熱利用システム。   The said hot water storage tank is comprised with a some tank, The hot water utilization system in any one of Claim 1 to 4 characterized by the above-mentioned. 前記排湯貯留槽には、汚水配管が接続されていないことを特徴とする請求項１から５のいずれかに記載の排湯熱利用システム。   The waste water heat utilization system according to any one of claims 1 to 5, wherein a waste water pipe is not connected to the waste water storage tank. 前記排湯貯留槽内の貯留水は、当該排湯貯留槽の下部から排出されることを特徴とする請求項１から６のいずれかに記載の排湯熱利用システム。   The wastewater heat utilization system according to any one of claims 1 to 6, wherein the stored water in the wastewater storage tank is discharged from a lower portion of the wastewater storage tank.
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CN105157099A (en) * 2015-09-02 2015-12-16 张林平 Hot water supply system

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JP2014194316A (en) * 2013-03-29 2014-10-09 Miura Co Ltd Water supply and heating system
CN105157099A (en) * 2015-09-02 2015-12-16 张林平 Hot water supply system

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