JP6143092B2 - Hot water storage system - Google Patents

Hot water storage system Download PDF

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JP6143092B2
JP6143092B2 JP2013153160A JP2013153160A JP6143092B2 JP 6143092 B2 JP6143092 B2 JP 6143092B2 JP 2013153160 A JP2013153160 A JP 2013153160A JP 2013153160 A JP2013153160 A JP 2013153160A JP 6143092 B2 JP6143092 B2 JP 6143092B2
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hot water
passage
temperature
heat source
tank
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JP2015021717A (en
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直人 岩澤
直人 岩澤
岩本 淳
淳 岩本
邦彦 中野
邦彦 中野
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Noritz Corp
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Description

本発明は貯湯給湯装置に関し、特に貯湯タンクの湯水温度が低下した場合に燃焼式の補助熱源機を利用して湯水を再加熱して出湯するものに関する。   The present invention relates to a hot water storage hot water supply apparatus, and more particularly to an apparatus for reheating hot water using a combustion type auxiliary heat source device when the hot water temperature of a hot water storage tank is lowered.

従来から、高温水を生成して貯湯し、所望の給湯先に供給可能な貯湯給湯装置が実用に供されている。この種の貯湯給湯装置は、湯水を貯留する為の貯湯タンクと、各種の弁部材や各種の配管類と、貯湯タンク内に貯留された湯水温度が低い場合等に再加熱する為の補助熱源機と、これら機器を内蔵した外装ケースと、高温水を生成する為の外部熱源機等を備えている。   2. Description of the Related Art Conventionally, hot water storage and hot water supply apparatuses that generate and store hot water and supply hot water to a desired hot water supply destination have been put to practical use. This type of hot water storage and hot water supply system has a hot water storage tank for storing hot water, various valve members and various pipes, and an auxiliary heat source for reheating when the temperature of the hot water stored in the hot water storage tank is low. Machine, an external case containing these devices, an external heat source machine for generating high-temperature water, and the like.

ところで、貯湯タンク内の湯水を再加熱する為に補助熱源機を稼動した場合、補助熱源機から給湯通路に流入した高温水が、貯湯タンクから補助熱源機をバイパスして給湯通路に流入した低温の湯水と混合してしまい、出湯特性が悪化する場合がある。この問題を解決する為に、補助熱源機を経由する通路に圧送ポンプを設置した構造の場合、圧送ポンプの出力能力を上昇させて、補助熱源機からの高温水を少量だけ常時貯湯タンク側へ流し込むように制御することで、貯湯タンク側から給湯通路に低温の湯水が流入するのを防止し、出湯特性の悪化を防止している。   By the way, when the auxiliary heat source unit is operated to reheat the hot water in the hot water storage tank, the high temperature water flowing from the auxiliary heat source unit into the hot water supply passage bypasses the auxiliary heat source device and flows into the hot water supply passage from the hot water storage tank. The hot water may be mixed with hot water, and the hot spring characteristics may deteriorate. In order to solve this problem, in the case of a structure where a pressure pump is installed in the passage through the auxiliary heat source unit, the output capacity of the pressure pump is increased so that a small amount of high-temperature water from the auxiliary heat source unit is always sent to the hot water storage tank side. By controlling to flow, low temperature hot water is prevented from flowing into the hot water supply passage from the hot water storage tank side, and deterioration of the hot water discharge characteristic is prevented.

上記の補助熱源機によって生成された高温水を貯湯タンク側に戻す技術としては、例えば、特許文献1の給湯システムでは、補助熱源機と、貯湯タンクから補助熱源機へ接続する通路と、補助熱源機から給湯通路へ接続する通路と、貯湯タンクの上部から補助熱源機をバイパスして直接給湯通路に接続する通路とからループ状循環回路を構成し、補助熱源機を利用した給湯運転終了後に、補助熱源機の稼動を一定時間継続して、高温水をループ状循環回路に循環させることで貯湯タンク側へ高温水を戻す技術も開示されている。   As a technique for returning the high-temperature water generated by the auxiliary heat source device to the hot water storage tank side, for example, in the hot water supply system of Patent Document 1, an auxiliary heat source device, a passage connecting the hot water storage tank to the auxiliary heat source device, and an auxiliary heat source A loop circulation circuit is constructed from the passage connecting from the machine to the hot water supply passage and the passage connecting directly from the upper part of the hot water storage tank to the hot water supply passage, and after the hot water supply operation using the auxiliary heat source machine is completed, A technique is also disclosed in which the operation of the auxiliary heat source unit is continued for a certain period of time and the high temperature water is returned to the hot water storage tank side by circulating the high temperature water to the loop circulation circuit.

特開2012−72952号公報JP 2012-72952 A

しかし、従来のように、補助熱源機を利用した給湯運転中に、補助熱源機で生成された高温水を貯湯タンク側に戻すと、この戻された湯水が貯湯タンクの上部から補助熱源機へ流れる湯水と混合し、補助熱源機へ流れる湯水温度が上昇するので、補助熱源機の熱交換効率が低下し、さらに、貯湯タンク側へ高温水を戻す為に圧送ポンプの出力を上昇させる必要があるので、圧送ポンプの消費電力が増加し、貯湯給湯装置の運転効率が低下するという問題がある。   However, if the high-temperature water generated by the auxiliary heat source unit is returned to the hot water storage tank side during the hot water supply operation using the auxiliary heat source unit, the returned hot water is transferred from the upper part of the hot water storage tank to the auxiliary heat source unit. Since the temperature of hot water flowing into the auxiliary heat source unit rises when mixed with flowing hot water, the heat exchange efficiency of the auxiliary heat source unit decreases, and it is necessary to increase the output of the pressure pump to return hot water to the hot water storage tank side. Therefore, there is a problem that the power consumption of the pressure pump increases and the operating efficiency of the hot water storage hot water supply device decreases.

また、特許文献1の給湯システムのように、補助熱源機で加熱された湯水をループ状循環回路に循環させる技術を利用すると、給湯に寄与しない高温水を生成することになり、貯湯給湯装置の運転効率が低下する。   Moreover, if the technique which circulates the hot water heated with the auxiliary heat source machine to a loop-shaped circulation circuit like the hot-water supply system of patent document 1, it will produce the high temperature water which does not contribute to hot water supply, Operating efficiency is reduced.

ところで、補助熱源機の稼動判定は、貯湯タンクの上部に設置された湯水温度検知センサによって行われるので、貯湯タンクの湯水温度検知センサより上側には、給湯可能な高温水が残っている可能性がある。この貯湯タンク内に残っている給湯可能な高温水は、極力有効に利用することが望ましい。   By the way, since the operation determination of the auxiliary heat source unit is performed by the hot water temperature detection sensor installed at the upper part of the hot water storage tank, there is a possibility that hot water that can be supplied with hot water remains above the hot water temperature detection sensor of the hot water storage tank. There is. It is desirable to utilize the hot water remaining in the hot water storage tank that can supply hot water as effectively as possible.

本発明の目的は、貯湯給湯装置において、補助熱源機の熱交換効率の低下を防止可能なもの、等を提供することである。   The objective of this invention is providing the thing etc. which can prevent the fall of the heat exchange efficiency of an auxiliary heat source machine in a hot water storage hot-water supply apparatus.

請求項1の貯湯給湯装置は、貯湯タンクの上部から給湯通路に接続されるタンク出湯通路と、このタンク出湯通路から分岐され燃焼式の補助熱源機に接続される補助加熱通路と、この補助加熱通路に設置された圧送手段と、前記補助熱源機から前記給湯通路に接続される補助熱源機出湯通路とを備え、前記補助熱源機で加熱した高温水を前記給湯通路へ供給する場合には、前記補助熱源機出湯通路から前記タンク出湯通路へ高温水の一部が流れ込むように前記圧送手段を駆動する貯湯給湯装置において、前記貯湯タンクの上部から前記タンク出湯通路へ出湯される湯水温度を検知する為の温度検知手段と、この温度検知手段の検知温度に応じて前記圧送手段を制御する圧送手段制御手段とを備えたことを特徴としている。   The hot water storage and hot water supply apparatus according to claim 1 includes a tank hot water passage connected from the upper part of the hot water storage tank to the hot water supply passage, an auxiliary heating passage branched from the tank hot water passage and connected to a combustion type auxiliary heat source device, and the auxiliary heating passage. In the case of supplying a hot water heated by the auxiliary heat source machine to the hot water supply passage, comprising a pumping means installed in the passage and an auxiliary heat source machine outlet hot water passage connected from the auxiliary heat source machine to the hot water supply passage, In the hot water storage hot water supply apparatus that drives the pressure feeding means so that a part of high temperature water flows from the auxiliary heat source machine hot water discharge passage to the tank hot water discharge passage, the temperature of hot water discharged from the upper part of the hot water storage tank to the tank hot water supply passage is detected. And a pressure feeding means control means for controlling the pressure feeding means in accordance with the temperature detected by the temperature detecting means.

請求項2の貯湯給湯装置は、請求項1の発明において、前記圧送手段制御手段は、前記温度検知手段の検知温度が設定温度以上の場合、前記補助熱源機出湯通路から前記タンク出湯通路へ高温水が流れ込まないように前記圧送手段を制御し、前記温度検知手段の検知温度が設定温度未満になった場合、前記補助熱源機出湯通路から前記タンク出湯通路へ高温水の一部が流れ込むように前記圧送手段を制御することを特徴としている。   According to a second aspect of the present invention, there is provided the hot water storage and hot water supply apparatus according to the first aspect of the invention, wherein the pressure feeding means control means has a high temperature from the auxiliary heat source machine hot water passage to the tank hot water passage when the temperature detected by the temperature detection means is equal to or higher than a preset temperature. The pressure feeding means is controlled so that water does not flow, and when the detected temperature of the temperature detecting means becomes lower than a set temperature, a part of high temperature water flows from the auxiliary heat source machine hot water outlet passage to the tank hot water outlet passage. The pumping means is controlled.

請求項1の発明によれば、貯湯タンクの上部からタンク出湯通路へ出湯される湯水温度を検知する為の温度検知手段と、この温度検知手段の検知温度に応じて圧送手段を制御する圧送手段制御手段とを備えたので、圧送手段制御手段によって、貯湯タンクの上部からタンク出湯通路へ出湯される湯水温度に応じて、補助熱源機出湯通路からタンク出湯通路へ流れ込む高温水の流量を可変にすることができる。   According to the first aspect of the present invention, the temperature detecting means for detecting the temperature of hot water discharged from the upper part of the hot water storage tank to the tank outlet passage, and the pressure feeding means for controlling the pressure feeding means in accordance with the detected temperature of the temperature detecting means. Control means so that the flow rate of hot water flowing from the auxiliary heat source machine hot water outlet passage to the tank hot water passage can be varied according to the hot water temperature discharged from the upper part of the hot water storage tank to the tank hot water outlet passage by the pressure feeding means control means. can do.

従って、補助熱源機を稼動した際に、温度検知手段より下流側に給湯可能な高温水が残っている場合、この給湯可能な高温水が補助熱源機で生成された高温水と混合しても出湯特性は著しく悪化しないので、圧送手段の出力能力を抑制して、補助熱源機からの高温水を貯湯タンク側へ流し込ませない。故に、貯湯タンク側へ高温水が戻らないので、補助熱源機へ流れる湯水温度は上昇せず、補助熱源機の熱交換効率が低下するのを防止可能であり、さらに、出湯特性を維持しつつ、圧送手段の消費電力を低減することができるので、貯湯給湯装置の運転効率が向上する。   Therefore, when hot water that can be supplied with hot water remains downstream from the temperature detecting means when the auxiliary heat source unit is operated, even if this hot water that can be supplied with hot water is mixed with the hot water generated by the auxiliary heat source device Since the hot water discharge characteristic does not deteriorate significantly, the output capacity of the pumping means is suppressed, and the high temperature water from the auxiliary heat source machine is not allowed to flow into the hot water storage tank side. Therefore, since hot water does not return to the hot water storage tank side, the temperature of hot water flowing to the auxiliary heat source machine does not rise, and it is possible to prevent the heat exchange efficiency of the auxiliary heat source machine from being lowered, while maintaining the hot water discharge characteristics. Since the power consumption of the pumping means can be reduced, the operating efficiency of the hot water storage hot water supply apparatus is improved.

請求項2の発明によれば、圧送手段制御手段は、温度検知手段の検知温度が設定温度以上の場合、補助熱源機出湯通路からタンク出湯通路へ高温水が流れ込まないように圧送手段を制御し、温度検知手段の検知温度が設定温度未満になった場合、補助熱源機出湯通路からタンク出湯通路へ高温水の一部が流れ込むように圧送手段を制御するので、温度検知手段より下流側における給湯可能な高温水を確実に消費してから圧送手段の出力能力を上昇させて、補助熱源機出湯通路からタンク出湯通路へ高温水の一部が流れ込むようにすることで、従来通り出湯特性を維持することができる。   According to the invention of claim 2, the pressure feeding means control means controls the pressure feeding means so that the high temperature water does not flow from the auxiliary heat source machine hot water discharge passage into the tank hot water discharge passage when the detected temperature of the temperature detection means is equal to or higher than the set temperature. When the temperature detected by the temperature detecting means is lower than the set temperature, the pressure feeding means is controlled so that a part of the high temperature water flows from the auxiliary heat source machine hot water outlet passage to the tank hot water outlet passage. Maintaining hot water discharge characteristics as before by increasing the output capacity of the pumping means after consuming high-temperature water as much as possible and allowing some of the hot water to flow from the auxiliary heat source machine hot water passage to the tank hot water passage. can do.

本発明の実施例に係る貯湯給湯装置の概略構成図である。It is a schematic block diagram of the hot water storage hot-water supply apparatus which concerns on the Example of this invention. 給湯運転制御のフローチャートである。It is a flowchart of hot water supply operation control.

以下、本発明を実施するための形態について実施例に基づいて説明する。   Hereinafter, modes for carrying out the present invention will be described based on examples.

先ずは、本発明の貯湯給湯装置1の全体構成について説明する。
図1に示すように、貯湯給湯装置1は、貯湯、給湯、床暖房パネル等の温水暖房端末への温水の供給等の機能を有するものであり、貯湯タンク2を備えたタンクユニット1A、貯湯タンク2内の湯水を加熱する為の外部熱源機10、タンクユニット1Aと外部熱源機10とを接続する湯水循環回路6等を備えている。
First, the whole structure of the hot water storage hot-water supply apparatus 1 of this invention is demonstrated.
As shown in FIG. 1, a hot water storage and hot water supply apparatus 1 has functions such as hot water storage, hot water supply, hot water supply to a hot water heating terminal such as a floor heating panel, etc., and a tank unit 1A including a hot water storage tank 2, a hot water storage An external heat source device 10 for heating hot water in the tank 2 and a hot water circulation circuit 6 for connecting the tank unit 1A and the external heat source device 10 are provided.

タンクユニット1Aは、貯湯タンク2、補助熱源機3、暖房用熱交換器4、給水経路5、湯水循環回路6、給湯経路7、暖房水を床暖房パネル等に供給する温水暖房回路8、温水暖房回路8の暖房水を加熱する熱利用循環回路9等を備え、これら大部分は外装ケース11内に一体的に収納されている。尚、外部熱源機10としては、ヒートポンプ式熱源機や燃料電池発電ユニットの排熱回収熱交換器等が活用される。   The tank unit 1A includes a hot water storage tank 2, an auxiliary heat source unit 3, a heat exchanger 4 for heating, a water supply path 5, a hot water circulation circuit 6, a hot water supply path 7, a hot water heating circuit 8 for supplying heating water to a floor heating panel, etc. A heat-utilizing circuit 9 for heating the heating water of the heating circuit 8 and the like are provided, and most of them are integrally stored in the outer case 11. As the external heat source unit 10, a heat pump type heat source unit, an exhaust heat recovery heat exchanger of a fuel cell power generation unit, or the like is used.

次に、貯湯タンク2について説明する。
図1に示すように、貯湯タンク2は、外部熱源機10で加熱された高温水(例えば、80〜90℃)を貯留可能な密閉タンクで構成され、貯留された湯水の放熱を防ぐ為にタンク周囲は断熱材で覆われている。
Next, the hot water storage tank 2 will be described.
As shown in FIG. 1, the hot water storage tank 2 is composed of a sealed tank capable of storing high-temperature water (for example, 80 to 90 ° C.) heated by the external heat source unit 10, in order to prevent heat dissipation of the stored hot water. The tank is covered with insulation.

貯湯タンク2の外周部には、下側から上側に向かって等間隔に湯水温度検知センサ2a〜2dが順に設けられ、これら複数の貯湯タンク湯水温度検知センサ2a〜2dにより貯湯タンク2内の複数の貯留層の湯水の温度が検出される。   Hot water temperature detection sensors 2a to 2d are sequentially provided on the outer peripheral portion of the hot water storage tank 2 from the lower side toward the upper side in order, and a plurality of hot water temperature detection sensors 2a to 2d are provided in the hot water storage tank 2 by the plurality of hot water storage tank hot water temperature detection sensors 2a to 2d. The temperature of the hot water in the reservoir is detected.

補助熱源機3は、バーナーや熱交換器等を内蔵した公知のガス給湯器で構成されている。補助熱源機3は、貯湯タンク2内の湯水温度が低下した場合等の特別な場合に限り、制御ユニット35から指令が送信されて燃焼作動され、湯水を加熱するものである。   The auxiliary heat source unit 3 is composed of a known gas water heater that incorporates a burner, a heat exchanger, and the like. The auxiliary heat source unit 3 is heated only when a command is transmitted from the control unit 35 in response to a special case such as when the hot water temperature in the hot water storage tank 2 is lowered, and heats the hot water.

暖房用熱交換器4は、温水暖房回路8を流れる暖房水を加熱するものであり、熱利用循環回路9の一部となる熱交換通路部4aと、温水暖房回路8の一部となる熱交換通路部4bとを有している。この暖房用熱交換器4において、熱利用循環回路9を流れる高温水と温水暖房回路8を流れる暖房水との間で熱交換され、暖房水が加熱される。   The heating heat exchanger 4 heats the heating water flowing through the hot water heating circuit 8, and the heat exchange passage portion 4 a that is a part of the heat utilization circulation circuit 9 and the heat that is a part of the hot water heating circuit 8. And an exchange passage portion 4b. In the heating heat exchanger 4, heat is exchanged between the high-temperature water flowing in the heat utilization circulation circuit 9 and the heating water flowing in the hot water heating circuit 8, and the heating water is heated.

次に、給水経路5について説明する。
図1に示すように、給水経路5は、上水源から低温の上水を貯湯タンク2に供給するものであり、上流給水通路部5a、中間給水通路部5b、下流給水通路部5cを有している。上流給水通路部5aの上流端が上水源に接続され、下流給水通路部5cの下流端が貯湯タンク2の下部に接続されている。上流給水通路部5aと中間給水通路部5bとの間から給湯経路7に接続するバイパス通路部12が分岐されている。上流給水通路部5aには、開閉弁5eが設置され、通常は開閉弁5eは開弁されていて、低温の湯水を貯湯タンク2内に供給するようになっている。中間給水通路部5bには、逆止弁5dが設置され、バイパス通路部12には、逆止弁12aが設置されている。
Next, the water supply path 5 will be described.
As shown in FIG. 1, the water supply path 5 supplies low temperature clean water from a water supply source to the hot water storage tank 2, and has an upstream water supply passage part 5a, an intermediate water supply passage part 5b, and a downstream water supply passage part 5c. ing. An upstream end of the upstream water supply passage portion 5 a is connected to a water source, and a downstream end of the downstream water supply passage portion 5 c is connected to a lower portion of the hot water storage tank 2. A bypass passage 12 connected to the hot water supply passage 7 is branched from between the upstream water supply passage 5a and the intermediate water supply passage 5b. An open / close valve 5e is installed in the upstream water supply passage 5a, and the open / close valve 5e is normally opened so that low-temperature hot water is supplied into the hot water storage tank 2. A check valve 5d is installed in the intermediate water supply passage 5b, and a check valve 12a is installed in the bypass passage 12.

中間給水通路部5bと下流給水通路部5cとの間から熱利用循環回路9に接続するバイパス通路部14が分岐され、この分岐部には、蓄熱切換弁15が設置されている。このバイパス通路部14により、低温の上水を熱利用循環回路9に供給することができ、また逆に、熱利用循環回路9から湯水を貯湯タンク2に戻すことができる。尚、下流給水通路部5cから外部に連なる排水通路31が分岐され、この排水通路31に貯湯タンク2の排水を行う為の手動式又は自動式の排水弁32が設置され、通常は排水弁32は閉弁されている。   A bypass passage 14 connected to the heat utilization circuit 9 is branched from between the intermediate water supply passage 5b and the downstream water supply passage 5c, and a heat storage switching valve 15 is installed at this branch. By this bypass passage 14, low temperature clean water can be supplied to the heat utilization circuit 9, and conversely, hot water can be returned from the heat utilization circuit 9 to the hot water storage tank 2. A drainage passage 31 connected to the outside is branched from the downstream water supply passage portion 5c, and a manual or automatic drainage valve 32 for draining the hot water storage tank 2 is installed in the drainage passage 31, and usually a drainage valve 32 is provided. Is closed.

次に、湯水循環回路6について説明する。
図1に示すように、湯水循環回路6は、貯湯タンク2と外部熱源機10との間に湯水を循環させて加熱する閉回路であり、上流低温側循環通路部6a、ユニット外低温側循環通路部6b、下流低温側循環通路部6c、上流高温側循環通路部6d、ユニット外高温側循環通路部6e、下流高温側循環通路部6f等を有している。上流低温側循環通路部6aの上流端が貯湯タンク2の下部に接続され、下流高温側循環通路部6fの下流端が貯湯タンク2の上部に接続されている。
Next, the hot water circulation circuit 6 will be described.
As shown in FIG. 1, the hot water circulation circuit 6 is a closed circuit that heats hot water by circulating it between the hot water storage tank 2 and the external heat source unit 10. It has a passage portion 6b, a downstream low temperature side circulation passage portion 6c, an upstream high temperature side circulation passage portion 6d, an outside unit high temperature side circulation passage portion 6e, a downstream high temperature side circulation passage portion 6f, and the like. The upstream end of the upstream low temperature side circulation passage portion 6 a is connected to the lower portion of the hot water storage tank 2, and the downstream end of the downstream high temperature side circulation passage portion 6 f is connected to the upper portion of the hot water storage tank 2.

上流低温側循環通路部6aと下流高温側循環通路部6fは、外装ケース11内に設置されている。上流低温側循環通路部6aから下流高温側循環通路部6fに接続する分岐通路部16が分岐され、この分岐部には、貯湯タンク2を含めた循環回路と貯湯タンク2をバイパスする循環回路とを択一的に選択可能な三方弁17が設置されている。上流低温側循環通路部6aの三方弁17の下流側に循環ポンプ18が設置されている。   The upstream low temperature side circulation passage portion 6 a and the downstream high temperature side circulation passage portion 6 f are installed in the outer case 11. A branch passage portion 16 connected from the upstream low temperature side circulation passage portion 6a to the downstream high temperature side circulation passage portion 6f is branched, and the branch portion includes a circulation circuit including the hot water storage tank 2 and a circulation circuit bypassing the hot water storage tank 2. A three-way valve 17 that can alternatively be selected is provided. A circulation pump 18 is installed on the downstream side of the three-way valve 17 in the upstream low temperature side circulation passage portion 6a.

下流低温側循環通路部6cと上流高温側循環通路部6dは、外部熱源機10の外装ケース10a内に設置されている。下流低温側循環通路部6cと上流高温側循環通路部6dとの間に外部熱源機10の熱交換部10bが設けられている。   The downstream low-temperature side circulation passage portion 6 c and the upstream high-temperature side circulation passage portion 6 d are installed in the exterior case 10 a of the external heat source device 10. A heat exchanging portion 10b of the external heat source device 10 is provided between the downstream low temperature side circulation passage portion 6c and the upstream high temperature side circulation passage portion 6d.

外装ケース11に1対の継手19a,19bが設置され、外部熱源機10の外装ケース10aにも1対の継手19c,19dが設置されている。ユニット外低温側循環通路部6bの両端部は継手19a,19cに連結され、ユニット外高温側循環通路部6eの両端部は継手19b,19dに連結されている。各継手19a〜19dには、水抜き栓が夫々設けられている。   A pair of joints 19 a and 19 b are installed in the outer case 11, and a pair of joints 19 c and 19 d are also installed in the outer case 10 a of the external heat source device 10. Both ends of the low temperature side circulation passage 6b outside the unit are connected to joints 19a and 19c, and both ends of the high temperature side circulation passage 6e outside the unit are connected to joints 19b and 19d. Each of the joints 19a to 19d is provided with a drain plug.

次に、給湯経路7について説明する。
図1に示すように、給湯経路7は、貯湯タンク2内に貯湯された湯水を風呂等の所望の給湯先に供給するものであり、給湯栓に接続される給湯通路21、貯湯タンク2の上部から給湯通路21に接続されるタンク出湯通路22、このタンク出湯通路22から分岐され燃焼式の補助熱源機3に接続される補助加熱通路23、補助熱源機3から給湯通路21に接続される補助熱源機出湯通路24等を有している。
Next, the hot water supply path 7 will be described.
As shown in FIG. 1, the hot water supply path 7 supplies hot water stored in the hot water storage tank 2 to a desired hot water supply destination such as a bath. The hot water supply passage 21 connected to the hot water tap and the hot water storage tank 2 are connected to each other. A tank hot water passage 22 connected to the hot water supply passage 21 from above, an auxiliary heating passage 23 branched from the tank hot water passage 22 and connected to the combustion type auxiliary heat source device 3, and connected to the hot water supply passage 21 from the auxiliary heat source device 3. The auxiliary heat source machine hot water outlet passage 24 and the like are provided.

給湯通路21は、高温水が流れる上流給湯通路部21a、混合湯水が流れる下流給湯通路部21bを有し、上流給湯通路部21aの上流端がタンク出湯通路22の下流端に接続され、下流給湯通路部21bの下流端が給湯栓に接続されている。上流給湯通路部21aと下流給湯通路部21bとの間には、混合弁25が設置されている。この混合弁25に給水経路5から分岐したバイパス通路部12が接続されている。混合弁25は、出湯温度が指令温度になるように水と高温水の混合比を制御するものである。下流給湯通路部21bには、流量センサ21cが設置されている。   The hot water supply passage 21 has an upstream hot water supply passage portion 21a through which high-temperature water flows and a downstream hot water supply passage portion 21b through which mixed hot water flows, and the upstream end of the upstream hot water supply passage portion 21a is connected to the downstream end of the tank outlet hot water passage 22, The downstream end of the passage portion 21b is connected to the hot water tap. A mixing valve 25 is installed between the upstream hot water supply passage portion 21a and the downstream hot water supply passage portion 21b. A bypass passage portion 12 branched from the water supply path 5 is connected to the mixing valve 25. The mixing valve 25 controls the mixing ratio of water and high temperature water so that the tapping temperature becomes the command temperature. A flow rate sensor 21c is installed in the downstream hot water supply passage 21b.

タンク出湯通路22は、上流出湯通路部22a、下流出湯通路部22bを有し、上流出湯通路部22aの上流端が貯湯タンク2の上部に接続され、下流出湯通路部22bの下流端が上流給湯通路部21aの上流端に接続されている。上流出湯通路部22aと下流出湯通路部22bとの間から補助加熱通路23が分岐されている。タンク出湯通路22の補助加熱通路23が分岐する分岐部よりも上流側であって上流出湯通路部22aには、タンク出湯通路22から補助加熱通路23に流れる湯水温度を検知する為の通路湯水温度検知センサ25(温度検知手段に相当する)が設置されている。   The tank outlet 22 has an upper outlet hot water passage 22a and a lower outlet hot water passage 22b. The upstream end of the upper outlet hot water passage 22a is connected to the upper part of the hot water storage tank 2 and is downstream of the lower outlet hot water passage 22b. The end is connected to the upstream end of the upstream hot water supply passage 21a. An auxiliary heating passage 23 is branched from between the upper effluent passage portion 22a and the lower effluent passage portion 22b. A passage hot water for detecting the temperature of hot water flowing from the tank hot water passage 22 to the auxiliary heating passage 23 is upstream of the branching portion of the auxiliary hot water passage 23 of the tank hot water passage 22 and upstream of the upper hot water passage passage portion 22a. A temperature detection sensor 25 (corresponding to temperature detection means) is installed.

補助加熱通路23は、上流加熱通路部23a、下流加熱通路部23bを有し、上流加熱通路部23aの上流端がタンク出湯通路22に接続され、下流加熱通路部23bの下流端が補助熱源機3の導入口に接続されている。上流加熱通路部23aと下流加熱通路部23bとの間にタンク出湯通路22と補助加熱通路23とを切り換え可能な三方弁26が設置されている。三方弁26には、熱利用循環回路9の湯水戻り側通路部9bの下流端も接続されている。この三方弁26は、上流加熱通路部23aと下流加熱通路部23bとの間の接続・遮断及び下流加熱通路部23bと湯水戻り側通路部9bとの間の接続・遮断を切換可能なものである。下流加熱通路部23bには、圧送ポンプ27(圧送手段に相当する)が設置されている。   The auxiliary heating passage 23 has an upstream heating passage portion 23a and a downstream heating passage portion 23b, the upstream end of the upstream heating passage portion 23a is connected to the tank outlet passage 22, and the downstream end of the downstream heating passage portion 23b is an auxiliary heat source machine. 3 is connected to the inlet. A three-way valve 26 capable of switching between the tank hot water passage 22 and the auxiliary heating passage 23 is installed between the upstream heating passage portion 23a and the downstream heating passage portion 23b. The three-way valve 26 is also connected to the downstream end of the hot water return side passage portion 9b of the heat utilization circuit 9. This three-way valve 26 can switch connection / disconnection between the upstream heating passage portion 23a and the downstream heating passage portion 23b and connection / disconnection between the downstream heating passage portion 23b and the hot water return side passage portion 9b. is there. A pressure feed pump 27 (corresponding to pressure feed means) is installed in the downstream heating passage 23b.

補助熱源機出湯通路24は、上流補助出湯通路部24a、下流補助出湯通路部24bを有し、上流補助出湯通路部24aの上流端が補助熱源機3の導出口に接続され、下流補助出湯通路部24bの下流端が上流給湯通路部21aの上流端に接続されている。上流補助出湯通路部24aと下流補助出湯通路部24bとの間から熱利用循環回路9の湯水往き側通路部9aが分岐されている。下流補助出湯通路部24bにタンク水比例弁28が設置されている。   The auxiliary heat source machine outlet passage 24 has an upstream auxiliary outlet passage portion 24a and a downstream auxiliary outlet passage portion 24b, and the upstream end of the upstream auxiliary outlet passage portion 24a is connected to the outlet of the auxiliary heat source unit 3, and the downstream auxiliary outlet passage The downstream end of the portion 24b is connected to the upstream end of the upstream hot water supply passage portion 21a. A hot water / outward side passage portion 9a of the heat utilization circulation circuit 9 is branched from between the upstream auxiliary hot water passage portion 24a and the downstream auxiliary hot water passage portion 24b. A tank water proportional valve 28 is provided in the downstream auxiliary hot water passage portion 24b.

次に、温水暖房回路8について説明する。
図1に示すように、温水暖房回路8は、床暖房パネルや浴室乾燥機等に供給される暖房水を循環させる回路であり、暖房戻り側通路部8a、暖房往き側通路部8bを有している。暖房戻り側通路部8aと暖房往き側通路部8bとの間に暖房用熱交換器4の熱交換通路部4bが設置されている。
Next, the hot water heating circuit 8 will be described.
As shown in FIG. 1, the hot water heating circuit 8 is a circuit that circulates heating water supplied to a floor heating panel, a bathroom dryer or the like, and has a heating return side passage portion 8a and a heating forward side passage portion 8b. ing. The heat exchange passage portion 4b of the heating heat exchanger 4 is installed between the heating return side passage portion 8a and the heating outgoing side passage portion 8b.

次に、熱利用循環回路9について説明する。
図1に示すように、熱利用循環回路9は、湯水を循環させて温水暖房回路8との間で熱交換を行う閉回路であり、湯水往き側通路部9a、湯水戻り側通路部9b、補助加熱通路23の下流加熱通路部23b、補助熱源機出湯通路24の上流補助出湯通路部24aを有している。湯水往き側通路部9aと湯水戻り側通路部9bとの間に、暖房用熱交換器4の熱交換通路部4aが接続されている。
Next, the heat utilization circulation circuit 9 will be described.
As shown in FIG. 1, the heat utilization circuit 9 is a closed circuit that circulates hot water and exchanges heat with the hot water heating circuit 8, and includes a hot water going-side passage portion 9 a, a hot water return side passage portion 9 b, A downstream heating passage portion 23 b of the auxiliary heating passage 23 and an upstream auxiliary hot water passage portion 24 a of the auxiliary heat source machine hot water passage 24 are provided. A heat exchange passage portion 4a of the heat exchanger 4 for heating is connected between the hot water going side passage portion 9a and the hot water return side passage portion 9b.

次に、制御ユニット35について説明する。
図1に示すように、貯湯給湯装置1は、制御ユニット35によって制御される。各種のセンサの検知信号が制御ユニット35に送信され、この制御ユニット35により、貯湯給湯装置1の動作、各種のポンプの作動・停止、各種の弁の開閉状態の切り換え及び開度調整等を制御し、各種運転(給湯運転、湯水加熱運転、暖房運転、排水運転等)を実行する。
Next, the control unit 35 will be described.
As shown in FIG. 1, the hot water storage and hot water supply device 1 is controlled by a control unit 35. Detection signals of various sensors are transmitted to the control unit 35, and the control unit 35 controls the operation of the hot water storage and hot water supply device 1, the operation / stop of various pumps, the switching of the open / close states of various valves, and the opening degree adjustment. Then, various operations (hot water supply operation, hot water heating operation, heating operation, drainage operation, etc.) are executed.

次に、補助熱源機3を利用した給湯運転制御について、図2のフローチャートに基づいて説明する。尚、図中の符号Si(i=1,2,・・)は各ステップを示す。この給湯運転制御の制御プログラムは、制御ユニット35に予め格納されている。   Next, hot water supply operation control using the auxiliary heat source unit 3 will be described based on the flowchart of FIG. In the figure, the symbol Si (i = 1, 2,...) Indicates each step. The control program for the hot water supply operation control is stored in the control unit 35 in advance.

図2のフローチャートにおいて、この制御が開始されると、最初にS1において、ユーザーの操作や各種のセンサの検知信号に基づいて給湯運転開始条件成立か否か判定される。S1の判定がYesの場合、つまり、給湯運転を開始する為の条件が成立している場合は、S2に移行し、S1の判定がNoのうちはS1を繰り返す。   In the flowchart of FIG. 2, when this control is started, first, in S1, it is determined whether or not a hot water supply operation start condition is satisfied based on a user operation and detection signals of various sensors. When the determination of S1 is Yes, that is, when the condition for starting the hot water supply operation is satisfied, the process proceeds to S2, and S1 is repeated while the determination of S1 is No.

次に、S2において、給湯運転を開始し、S3に移行する。即ち、給湯栓の開放に伴い、貯湯タンク2にかかる給水圧によって貯湯タンク2の上部から高温水がタンク出湯通路22に押し出され、この高温水は、タンク出湯通路22を通って給湯通路21に流入し、混合弁25において低温の上水と混合されて温度調整され、この温度調整された湯水が給湯栓から給湯される。   Next, in S2, a hot water supply operation is started, and the process proceeds to S3. That is, with the opening of the hot water tap, hot water is pushed out from the upper part of the hot water storage tank 2 to the tank hot water passage 22 by the hot water pressure applied to the hot water storage tank 2, and this hot water passes through the tank hot water supply passage 22 to the hot water supply passage 21. The temperature is adjusted by mixing with low temperature clean water in the mixing valve 25, and the temperature-adjusted hot water is supplied from the hot water tap.

次に、S3において、貯湯タンク湯水温度検知センサ2dの検知信号を読み込み、この検知信号に基づいて、貯湯タンク2内の上部に貯留されている湯水温度(検知温度)Taを算出して、S4に移行する。   Next, in S3, the detection signal of the hot water storage tank hot water temperature detection sensor 2d is read, and based on this detection signal, the hot water temperature (detection temperature) Ta stored in the upper part of the hot water storage tank 2 is calculated. Migrate to

次に、S4において、貯湯タンク2内の上部の湯水温度Taが、給湯設定温度(例えば40℃)に所定の設定温度α(例えば5℃)加えた第1設定温度以下か否かを判定する。S4の判定がYesの場合、つまり、貯湯タンク2内の高温水の量が減少し、高温水が貯湯タンク2内において貯湯タンク湯水温度検知センサ2dの上側の容積分しか残っていない場合は、S5に移行する。   Next, in S4, it is determined whether or not the hot water temperature Ta in the upper part of the hot water storage tank 2 is equal to or lower than a first set temperature obtained by adding a predetermined set temperature α (for example, 5 ° C.) to a set temperature for hot water supply (for example, 40 ° C.). . When the determination of S4 is Yes, that is, when the amount of hot water in the hot water storage tank 2 is reduced and the hot water remains in the hot water storage tank 2 only for the volume above the hot water storage tank hot water temperature detection sensor 2d, The process proceeds to S5.

尚、S4の判定がNoの場合、つまり、貯湯タンク2内に高温水が十分に残っている場合は、S6に移行して、給湯運転終了条件成立か否か判定される。S6の判定がYesの場合、S12に移行して、給湯運転を終了する。S6の判定がNoの場合、つまり、給湯運転を継続する場合は、S3に移行して、S3とS4を繰り返し実行する。   If the determination in S4 is No, that is, if sufficient hot water remains in the hot water storage tank 2, the process proceeds to S6 to determine whether or not the hot water supply operation end condition is satisfied. When determination of S6 is Yes, it transfers to S12 and a hot water supply driving | operation is complete | finished. When the determination of S6 is No, that is, when the hot water supply operation is continued, the process proceeds to S3, and S3 and S4 are repeatedly executed.

次に、S5において、湯水温度Taが第1設定温度以下になった場合に、三方弁26を補助加熱通路23側に切り換え、圧送ポンプ27を駆動して、補助熱源機3を稼動して、S7に移行する。即ち、圧送ポンプ27の駆動に伴い、貯湯タンク2から出湯した湯水は、タンク出湯通路22の上流出湯通路部22aから補助加熱通路23へ流れて補助熱源機3に流入し、補助熱源機3で加熱された湯水(例えば75度)は、補助熱源機出湯通路24を流れて給湯通路21に流入する。   Next, in S5, when the hot water temperature Ta becomes equal to or lower than the first set temperature, the three-way valve 26 is switched to the auxiliary heating passage 23 side, the pumping pump 27 is driven, and the auxiliary heat source unit 3 is operated. The process proceeds to S7. That is, the hot water discharged from the hot water storage tank 2 in accordance with the driving of the pressure feed pump 27 flows from the upper outlet water passage portion 22a of the tank hot water passage 22 to the auxiliary heating passage 23 and flows into the auxiliary heat source device 3, and the auxiliary heat source device 3 The hot water heated at (for example, 75 degrees) flows through the auxiliary heat source machine hot water outlet passage 24 and flows into the hot water supply passage 21.

このとき、上流出湯通路部22aを流れる湯水の湯水温度Taは、最初は第1設定温度を超えているので、この湯水が下流出湯通路部22bを流れて補助熱源機3から給湯通路21へ流入する高温水と混合しても、出湯特性は著しく悪化しない。このため、圧送ポンプ27は、補助熱源機出湯通路24からタンク出湯通路22へ高温水が流れ込まないように制御することができる。例えば、流量センサ21cに基づいて算出された要求給湯流量が3.0 L/minの場合、タンク出湯通路21への押し戻し流量が0.0L/minとなるように、圧送ポンプ27は、補助熱源機3からの給湯流量が3.0 L/minとなるように制御される。   At this time, since the hot water temperature Ta of the hot water flowing through the upper effluent hot water passage portion 22a exceeds the first set temperature, the hot water flows through the lower effluent hot water passage portion 22b and flows from the auxiliary heat source machine 3 to the hot water supply passage 21. Even when mixed with hot water flowing into the water, the hot water characteristics are not significantly deteriorated. For this reason, the pressure feed pump 27 can be controlled so that high temperature water does not flow from the auxiliary heat source machine hot water passage 24 into the tank hot water passage 22. For example, when the required hot water supply flow rate calculated based on the flow rate sensor 21c is 3.0 L / min, the pressure feed pump 27 is supplied from the auxiliary heat source unit 3 so that the push back flow rate to the tank hot water discharge passage 21 is 0.0 L / min. The hot water flow rate is controlled to be 3.0 L / min.

次に、S7において、通路湯水温度検知センサ25の検知信号を読み込み、この検知信号に基づいて、タンク出湯通路22の上流出湯通路部22aを流れる湯水温度(検知温度)Tbを算出して、S8に移行する。   Next, in S7, the detection signal of the passage hot water temperature detection sensor 25 is read, and based on this detection signal, the hot water temperature (detection temperature) Tb flowing through the upper outlet water passage portion 22a of the tank outlet passage 22 is calculated, The process proceeds to S8.

次に、S8において、タンク出湯通路22の上流出湯通路部22aを流れる湯水温度Tbが、給湯設定温度に所定の設定温度β(例えば1℃)加えた第2設定温度(本発明の設定温度に相当する)未満か否かを判定する。S8の判定がYesの場合、つまり、貯湯タンク2内における貯湯タンク湯水温度検知センサ2dから上側の容積分の高温水が出湯され、タンク出湯通路22の湯水温度Tbが低下した場合は、S9に移行する。   Next, in S8, the hot water temperature Tb flowing through the upper outlet water passage portion 22a of the tank discharge passage 22 is set to a second set temperature (the set temperature of the present invention) obtained by adding a predetermined set temperature β (for example, 1 ° C.) to the hot water supply set temperature. Or less). When the determination of S8 is Yes, that is, when the hot water for the upper volume is discharged from the hot water storage tank hot water temperature detection sensor 2d in the hot water storage tank 2 and the hot water temperature Tb of the tank hot water discharge passage 22 is lowered, the process goes to S9. Transition.

尚、S8の判定がNoの場合、つまり、貯湯タンク2内に給湯可能な高温水が残っている場合は、S10に移行して、給湯運転終了条件成立か否か判定され、S10の判定がYesの場合、S12に移行して、給湯運転を終了する。S8の判定がNoの場合、つまり、給湯運転を継続する場合は、S7に移行して、S7とS8を繰り返し実行する。   If the determination in S8 is No, that is, if hot water that can be supplied with hot water remains in the hot water storage tank 2, the process proceeds to S10, where it is determined whether the hot water supply operation end condition is satisfied, and the determination in S10 is made. In the case of Yes, it transfers to S12 and completes the hot water supply operation. When the determination of S8 is No, that is, when the hot water supply operation is continued, the process proceeds to S7, and S7 and S8 are repeatedly executed.

次に、S9において、湯水温度Tbが第2設定温度未満になった場合に、圧送ポンプ27の出力能力を上昇させて、S11に移行する。即ち、貯湯タンク2内の上部から第2設定温度以上の給湯可能な高温水が上流出湯通路部22aを流れるが、この高温水の量は徐々に減少していくので、湯水温度Tbは徐々に低下し、第2設定温度未満になった場合に、圧送ポンプ27の出力能力を上昇させる。例えば、要求給湯流量が3.0 L/minの場合、タンク出湯通路22への押し戻し流量が0.5L/minとなるように、圧送ポンプ27は、補助熱源機3からの給湯流量が3.5 L/minとなるように制御される。このように、貯湯タンク2の上部からタンク出湯通路22へ流れる湯水の温度に応じて、タンク出湯通路22への押し戻し流量を可変にする。尚、タンク出湯通路22への押し戻し流量の設定値は、ほんの一例を示したに過ぎず、適宜変更可能である。   Next, in S9, when the hot water temperature Tb becomes lower than the second set temperature, the output capacity of the pressure feed pump 27 is increased, and the process proceeds to S11. That is, hot water capable of supplying hot water at a temperature equal to or higher than the second set temperature flows from the upper part of the hot water storage tank 2 through the upper effluent hot water passage portion 22a, but the amount of the high temperature water gradually decreases, so the hot water temperature Tb gradually increases. When the temperature falls below the second set temperature, the output capacity of the pressure pump 27 is increased. For example, when the required hot water supply flow rate is 3.0 L / min, the pressure feed pump 27 has a hot water supply flow rate of 3.5 L / min from the auxiliary heat source unit 3 so that the push-back flow rate to the tank discharge passage 22 is 0.5 L / min. It is controlled to become. In this way, the flow rate of pushing back into the tank hot water passage 22 is made variable in accordance with the temperature of the hot water flowing from the upper part of the hot water storage tank 2 to the tank hot water passage 22. Note that the set value of the flow rate of pushing back into the tank discharge passage 22 is merely an example and can be changed as appropriate.

S11において、給湯運転終了条件成立か否か判定され、S11の判定がNoのうちはS11の判定を繰り返し、S11の判定がYesの場合、S12に移行して、給湯運転を終了する。尚、制御ユニット35、制御プログラムのS3〜S9等が本発明の圧送手段制御手段に相当するものである。   In S11, it is determined whether or not the hot water supply operation termination condition is satisfied. If the determination in S11 is No, the determination in S11 is repeated. If the determination in S11 is Yes, the process proceeds to S12 to end the hot water supply operation. The control unit 35, the control programs S3 to S9, and the like correspond to the pressure feeding means control means of the present invention.

従来のように、圧送ポンプ27をタンク出湯通路22への押し戻し流量が一定となるように制御すると、要求給湯流量が低い程(例えば2.5 L/minの場合)、タンク出湯通路22への押し戻し流量の割合が高くなるので、補助熱源機3の熱交換効率が著しく低下していたが、圧送ポンプ27を可変にすることで、補助熱源機3の熱交換効率の低下を防止することができる。   When the pumping pump 27 is controlled so that the flow rate of pushing back into the tank hot water passage 22 becomes constant as in the prior art, the lower the required hot water supply flow rate (for example, 2.5 L / min), the push back flow rate into the tank hot water passage 22. However, the heat exchange efficiency of the auxiliary heat source unit 3 is remarkably lowered. However, by making the pressure pump 27 variable, it is possible to prevent the heat exchange efficiency of the auxiliary heat source unit 3 from being lowered.

本発明の貯湯給湯装置1の作用及び効果について説明する。
貯湯給湯装置1は、貯湯タンク2の上部からタンク出湯通路22へ出湯される湯水温度を検知する為の通路湯水温度検知センサ25と、この通路湯水温度検知センサ25の検知温度に応じて圧送ポンプ27を制御する制御ユニット35とを備えたので、制御ユニット35によって、貯湯タンク2の上部からタンク出湯通路22へ出湯される湯水温度に応じて、補助熱源機出湯通路24からタンク出湯通路22へ流れ込む高温水の流量を可変にすることができる。
The operation and effect of the hot water storage hot water supply apparatus 1 of the present invention will be described.
The hot water storage and hot water supply device 1 includes a passage hot water temperature detection sensor 25 for detecting the temperature of hot water discharged from the upper part of the hot water storage tank 2 to the tank hot water discharge passage 22, and a pressure pump according to the detected temperature of the passage hot water temperature detection sensor 25. The control unit 35 controls the hot water storage tank 2 from the upper part of the hot water storage tank 2 to the tank hot water passage 22 to the tank hot water passage 22 from the auxiliary heat source outlet hot water passage 24 according to the hot water temperature. The flow rate of hot water flowing in can be made variable.

従って、補助熱源機3を稼動した際に、通路湯水温度検知センサ25より下流側に給湯可能な高温水が残っている場合、この給湯可能な高温水が補助熱源機3で生成された高温水と混合しても出湯特性は著しく悪化しないので、圧送ポンプ27の出力能力を抑制して、補助熱源機3からの高温水を貯湯タンク2側へ流し込ませない。故に、貯湯タンク2側へ高温水が戻らないので、補助熱源機3へ流れる湯水温度は上昇せず、補助熱源機3の熱交換効率が低下するのを防止可能であり、さらに、出湯特性を維持しつつ、圧送ポンプ27の消費電力を低減することができるので、貯湯給湯装置1の運転効率が向上する。   Therefore, when hot water that can be supplied with hot water remains downstream of the passage hot water temperature detection sensor 25 when the auxiliary heat source device 3 is operated, the hot water that can be supplied with hot water is generated by the auxiliary heat source device 3. Since the hot water discharge characteristic does not deteriorate significantly even if mixed with the hot water, the output capacity of the pressure pump 27 is suppressed, and the high temperature water from the auxiliary heat source unit 3 is not allowed to flow into the hot water storage tank 2 side. Therefore, since hot water does not return to the hot water storage tank 2 side, the temperature of the hot water flowing to the auxiliary heat source unit 3 does not rise, and it is possible to prevent the heat exchange efficiency of the auxiliary heat source unit 3 from being lowered. Since the power consumption of the pressure pump 27 can be reduced while maintaining, the operating efficiency of the hot water storage hot water supply apparatus 1 is improved.

また、制御ユニット35は、通路湯水温度検知センサ25の検知温度が設定温度以上の場合、補助熱源機出湯通路24からタンク出湯通路22へ高温水が流れ込まないように圧送ポンプ27を制御し、通路湯水温度検知センサ25の検知温度が設定温度未満になった場合、補助熱源機出湯通路24からタンク出湯通路22へ高温水の一部が流れ込むように圧送ポンプ27を制御するので、通路湯水温度検知センサ25から下流側における給湯可能な高温水を確実に消費してから圧送ポンプ27の出力能力を上昇させて、補助熱源機出湯通路24からタンク出湯通路21へ高温水の一部が流れ込むようにすることで、従来通り出湯特性を維持することができる。   Further, the control unit 35 controls the pressure pump 27 so that the high temperature water does not flow from the auxiliary heat source machine hot water passage 24 into the tank hot water passage 22 when the detected temperature of the hot water temperature detection sensor 25 is equal to or higher than the set temperature. When the detected temperature of the hot water temperature detection sensor 25 is lower than the set temperature, the pressure pump 27 is controlled so that a part of the high-temperature water flows from the auxiliary heat source machine hot water outlet passage 24 to the tank hot water outlet passage 22. After the high temperature water that can be supplied with hot water downstream from the sensor 25 is surely consumed, the output capacity of the pressure feed pump 27 is increased so that a part of the high temperature water flows from the auxiliary heat source machine hot water outlet passage 24 into the tank hot water outlet passage 21. By doing so, the tapping characteristics can be maintained as usual.

次に、前記実施例を部分的に変更した形態について説明する。
[1]前記実施例において、通路湯水温度検知センサ25は、上流出湯通路部22aに設置されているが、この構造に限定する必要はなく、貯湯タンク2の外周部の通路湯水温度検知センサ25の上側に設置しても良い。
Next, a mode in which the above embodiment is partially changed will be described.
[1] In the above embodiment, the passage hot water temperature detection sensor 25 is installed in the upper effluent hot water passage portion 22a. However, the present invention is not limited to this structure, and the passage hot water temperature detection sensor in the outer peripheral portion of the hot water storage tank 2 is used. You may install in the upper side of 25.

[2]前記実施例において、三方弁26は、補助加熱通路23の下流加熱通路部23bに設置されているが、特にこの構造に限定する必要はなく、タンク出湯通路22から補助加熱通路23が分岐した分岐部に三方弁26を設置しても良い。 [2] In the above-described embodiment, the three-way valve 26 is installed in the downstream heating passage portion 23b of the auxiliary heating passage 23, but is not particularly limited to this structure. You may install the three-way valve 26 in the branched part which branched.

[3]前記実施例において、第1,第2設定温度はほんの一例を示したに過ぎず、第1,第2設定温度が給湯可能な温度であれば、適宜変更可能である。 [3] In the above-described embodiment, the first and second set temperatures are merely examples, and can be appropriately changed as long as the first and second set temperatures are temperatures at which hot water can be supplied.

[4]その他、当業者であれば、本発明の趣旨を逸脱することなく、前記実施例に種々の変更を付加した形態で実施可能であり、本発明はそのような変更形態を包含するものである。 [4] In addition, those skilled in the art can implement the present invention by adding various modifications without departing from the spirit of the present invention, and the present invention includes such modifications. It is.

1 貯湯給湯装置
2 貯湯タンク
2d 貯湯タンク湯水温度検知センサ
3 補助熱源機
10 外部熱源機
21 給湯通路
22 タンク出湯通路
23 補助加熱通路
24 補助熱源機出湯通路
25 通路湯水温度検知センサ
26 三方弁
27 圧送ポンプ
35 制御ユニット
DESCRIPTION OF SYMBOLS 1 Hot water storage hot water supply equipment 2 Hot water storage tank 2d Hot water storage tank hot water temperature detection sensor 3 Auxiliary heat source machine 10 External heat source machine 21 Hot water supply passage 22 Tank hot water supply passage 23 Auxiliary heating passage 24 Auxiliary heat source machine hot water supply passage 25 Passage hot water temperature detection sensor 26 Three-way valve 27 Pump 35 control unit

Claims (2)

貯湯タンクの上部から給湯通路に接続されるタンク出湯通路と、このタンク出湯通路から分岐され燃焼式の補助熱源機に接続される補助加熱通路と、この補助加熱通路に設置された圧送手段と、前記補助熱源機から前記給湯通路に接続される補助熱源機出湯通路とを備え、前記補助熱源機で加熱した高温水を前記給湯通路へ供給する場合には、前記補助熱源機出湯通路から前記タンク出湯通路へ高温水の一部が流れ込むように前記圧送手段を駆動する貯湯給湯装置において、
前記貯湯タンクの上部から前記タンク出湯通路へ出湯される湯水温度を検知する為の温度検知手段と、この温度検知手段の検知温度に応じて前記圧送手段を制御する圧送手段制御手段とを備えたことを特徴とする貯湯給湯装置。
A tank hot water passage connected from the upper part of the hot water storage tank to the hot water supply passage, an auxiliary heating passage branched from the tank hot water passage and connected to the combustion type auxiliary heat source machine, a pressure feeding means installed in the auxiliary heating passage, An auxiliary heat source machine outlet hot water passage connected from the auxiliary heat source machine to the hot water supply passage, and when supplying high temperature water heated by the auxiliary heat source machine to the hot water supply passage, the tank from the auxiliary heat source machine hot water outlet passage In the hot water storage hot water supply apparatus that drives the pressure feeding means so that a part of the high temperature water flows into the hot water passage,
Temperature detecting means for detecting the temperature of hot water discharged from the upper part of the hot water storage tank to the tank hot water outlet passage, and pressure feeding means control means for controlling the pressure feeding means according to the detected temperature of the temperature detecting means. A hot water storage hot water supply device characterized by that.
前記圧送手段制御手段は、前記温度検知手段の検知温度が設定温度以上の場合、前記補助熱源機出湯通路から前記タンク出湯通路へ高温水が流れ込まないように前記圧送手段を制御し、前記温度検知手段の検知温度が設定温度未満になった場合、前記補助熱源機出湯通路から前記タンク出湯通路へ高温水の一部が流れ込むように前記圧送手段を制御することを特徴とする請求項1に記載の貯湯給湯装置。
The pressure-feeding means control means controls the pressure-feeding means so that hot water does not flow from the auxiliary heat source machine hot water discharge passage into the tank hot water discharge passage when the temperature detected by the temperature detection means is equal to or higher than a preset temperature, and the temperature detection The said pressure feeding means is controlled so that a part of high-temperature water flows into the said tank outlet passage from the said auxiliary heat source machine outlet passage when the detection temperature of a means becomes less than preset temperature. Hot water storage hot water supply equipment.
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