JP2013108630A

JP2013108630A - Hot-water storage type hot-water supply apparatus

Info

Publication number: JP2013108630A
Application number: JP2011251393A
Authority: JP
Inventors: Takashi Magara; 隆志眞柄; Junpei Hayashi; 純平林
Original assignee: Corona Corp
Current assignee: Corona Corp
Priority date: 2011-11-17
Filing date: 2011-11-17
Publication date: 2013-06-06

Abstract

PROBLEM TO BE SOLVED: To provide a hot-water storage type hot-water supply apparatus which can store and boil water other than tap water even during a water stoppage state.SOLUTION: The hot-water supply apparatus has a circulation pump 10 which is provided in midstream of a supply pipe 8 and which circulates hot water, a return pipe 9 which returns from a heating heat exchanger 4 to an upper part of a hot-water storage tank 2, an auxiliary pipe 29 which is connected to the supply pipe 8 between the hot-water storage tank 2 and the circulation pump 10 through a switching valve 27, a return bypass pipe 31 which returns in midstream of the return pipe 9 and communicates a bottom portion of the hot-water storage tank 2 through a three-way valve 30, and a controlling unit 37 which has a boiling mode for controlling the circulation pump 10 and circulating the hot water in the hot-water storage tank 2 to the heating heat exchanger 4, wherein the controlling unit 37 has an emergency water storage mode for switching the switching valve 27 to the auxiliary pipe 29 side during water stoppage to make the return three-way valve 30 communicate with the return bypass pipe 31 for driving the circulation pump 10 and for storing water sucked through the auxiliary pipe 29 from the bottom portion of the hot-water storage tank 2 through the return bypass pipe 31.

Description

この発明は、地震等の災害発生後に電力は復旧したが水道が復旧せず断水状態で、水道水以外の水を貯水して沸き上げるようにした貯湯式給湯装置に関するものである。 The present invention relates to a hot water storage type hot water supply apparatus in which electric power is restored after a disaster such as an earthquake, but water is not restored and water is cut off, and water other than tap water is stored and heated.

従来この種の貯湯式給湯装置において、地震（予震）が発生しこれを検知した場合に、貯湯タンク内の湯水をヒートポンプユニットで沸き上げる沸き上げ時の沸き上げ目標温度を、給湯や風呂等に直接使用可能な低温に設定し、沸き上げを行うようにして、予震後に本震が起こって断水が発生した場合でも、貯湯タンクから生活用水として直接使用可能な温度の湯水を得られるようにしたものがあった。（特許文献１参照。） Conventionally, in this type of hot water storage hot water supply system, when an earthquake (pre-earthquake) has occurred and detected, the target boiling temperature when boiling the hot water in the hot water storage tank with the heat pump unit is set to the hot water supply, bath, etc. In order to obtain hot water at a temperature that can be used directly as domestic water from a hot water storage tank, even if a main shock occurs after the earthquake and a water outage occurs, the temperature is set to a low temperature that can be used directly. There was something to do. (See Patent Document 1.)

特開２００７−２５５７５３号公報JP 2007-255753 A

ところでこの従来のものでは、地震発生時に貯湯タンク内に残った湯水を使い切れば終わりであり、折角電力が復旧しても水道が復旧せず断水状態では使用出来ず、すなわち、通常地震による災害時の復旧では、いち早く電力は復旧するが、水道の復旧には時間がかかりなかなか復旧されないので、何とか水道の水以外を利用して貯湯式の給湯機でお湯を沸かして使用出来ないかと言うのが大きな課題であった。 By the way, with this conventional one, when the hot water remaining in the hot water storage tank is used up at the time of the earthquake, it is finished, and even if the corner power is restored, the water supply is not restored and it can not be used in the water cut state. In the restoration of power, power is restored quickly, but it takes time to restore the water supply, so it can be said that it can be used by boiling water with a hot water storage type water heater using water other than water. It was a big issue.

この発明は上記課題を解決するために、特にその構成を、湯水を貯湯する貯湯タンクと、該貯湯タンク内の湯水を加熱する加熱手段と、前記貯湯タンクの下部から前記加熱手段内に収納された加熱熱交換器に向かう往き管と、該往き管途中に設けられ湯水を循環させる循環ポンプと、前記加熱熱交換器から前記貯湯タンクの上部に戻る戻り管と、前記往き管の貯湯タンクと循環ポンプとの間に切替弁を介して接続された補助管と、前記戻り管途中で戻り三方弁を介して貯湯タンク底部に連通する戻りバイパス管と、前記循環ポンプを制御し貯湯タンク内の湯水を加熱熱交換器に循環させる沸き上げモードを備えた制御部とを備えたものに於いて、前記制御部には断水時に前記切替弁を補助管側に切替ると共に、戻り三方弁を戻りバイパス管側の連通として、循環ポンプを駆動させ補助管から吸引した水を戻りバイパス管を介して貯湯タンク底部から貯水する緊急貯水モードを備えたものである。 In order to solve the above-mentioned problems, the present invention is particularly housed in the hot water storage tank for storing hot water, the heating means for heating the hot water in the hot water storage tank, and the heating means from the lower part of the hot water storage tank. A forward pipe heading toward the heating heat exchanger, a circulation pump provided in the middle of the forward pipe for circulating hot water, a return pipe returning from the heating heat exchanger to an upper part of the hot water storage tank, and a hot water storage tank of the forward pipe An auxiliary pipe connected to the circulation pump via a switching valve, a return bypass pipe communicating with the bottom of the hot water tank via a return three-way valve in the middle of the return pipe, and the circulation pump for controlling the circulation pump in the hot water tank And a control unit having a boiling mode for circulating hot water to the heating heat exchanger. The control unit switches the switching valve to the auxiliary pipe side when water is shut off, and returns a return three-way valve. Bypass pipe side As communication is one having an emergency water storage mode in which the water from the hot water storage tank bottom through the bypass pipe returns the sucked water from the secondary pipe to drive the circulation pump.

以上のようにこの発明によれば、バケツ内の水を今ある配管を切替ることで、簡単に貯湯タンク内に貯水することが出来、後は通常通りの沸き上げ循環を行えば、貯湯タンク内に温水を貯湯することが出来、そしてこの温水を貯湯タンク下部に連通した非常用栓を開栓することで取り出して、給湯や風呂等の生活用水として使用されるものであり、災害時に断水状態でも電力が復旧していれば、容易に水道水以外の水を利用して給湯出来、断水でも一応給湯が使用出来て極めて使用勝手が良く、被災地では大きな希望の１つになりうるものである。 As described above, according to the present invention, the water in the bucket can be easily stored in the hot water storage tank by switching the existing pipe, and then the normal hot water circulation can be performed. Hot water can be stored inside, and the hot water is taken out by opening an emergency plug that communicates with the lower part of the hot water storage tank, and is used as domestic water for hot water and baths. If power is restored even in the state, water can be easily supplied using water other than tap water, hot water can be used even in the event of water outage, and it is very convenient to use, and can be one of the great hopes in the disaster area It is.

この発明の一実施形態の概略構成図。The schematic block diagram of one Embodiment of this invention. 同電気回路の要部ブロック図。The principal part block diagram of the same electric circuit. 同緊急貯水モードから沸き上げまでを示すフローチャート。The flowchart which shows from the same emergency water storage mode to boiling.

次に、この発明の貯湯式給湯装置の一実施形態を図面に基づき説明する。
１は湯水を貯湯する貯湯タンク２を備えた貯湯タンクユニット、３は貯湯タンク２内の湯水を加熱する加熱手段としてのヒートポンプユニット、４は前記ヒートポンプユニット３内に収納された加熱熱交換器としての水冷媒熱交換器、５は給湯設定温度を設定したり満タンモードや強制沸き増し運転モード等の各種の運転モードを手動で設定し、貯湯式給湯装置の運転操作を行うためのリモコンである。 Next, an embodiment of the hot water storage type hot water supply apparatus of the present invention will be described with reference to the drawings.
1 is a hot water storage tank unit having a hot water storage tank 2 for storing hot water, 3 is a heat pump unit as a heating means for heating the hot water in the hot water storage tank 2, and 4 is a heating heat exchanger housed in the heat pump unit 3. The water refrigerant heat exchanger 5 is a remote control for setting the hot water supply set temperature, manually setting various operation modes such as the full tank mode and forced boiling increase operation mode, and operating the hot water storage water heater. is there.

前記貯湯タンクユニット１の貯湯タンク２は、上端に出湯管６と、下端に給水管７とが接続され、更に前記水冷媒熱交換器４と循環可能に接続する往き管８が下部に、戻り管９が上部に接続されている。また、往き管８の途中には貯湯タンク２の湯水をヒートポンプユニット３に循環させる循環ポンプ１０が設けられ、往き管８、循環ポンプ１０、水冷媒熱交換器４、戻り管９で加熱循環回路１１を構成している。また、水冷媒熱交換器４の前後の往き管８及び戻り管９には、それぞれ入水温度センサ１２と沸き上げ温度検出手段としての沸き上げ温度センサ１３とが設けられている。 The hot water storage tank 2 of the hot water storage tank unit 1 has a hot water discharge pipe 6 connected to the upper end, a water supply pipe 7 connected to the lower end, and a forward pipe 8 connected to the water refrigerant heat exchanger 4 so as to be circulated back to the lower part. A tube 9 is connected to the top. Further, a circulation pump 10 for circulating hot water in the hot water storage tank 2 to the heat pump unit 3 is provided in the middle of the outward pipe 8, and the heating circulation circuit is constituted by the outward pipe 8, the circulation pump 10, the water refrigerant heat exchanger 4, and the return pipe 9. 11 is constituted. In addition, the incoming pipe 8 and the return pipe 9 before and after the water-refrigerant heat exchanger 4 are respectively provided with an incoming water temperature sensor 12 and a boiling temperature sensor 13 as a boiling temperature detecting means.

１４は給水管７から分岐されて貯湯タンク２をバイパスする給水バイパス管、１５は出湯管６からの湯と給水バイパス管１４からの水とを混合して給湯設定温度の湯に混合する給湯混合弁、１６は給湯混合弁１５で混合された湯を台所や洗面所等に設けられた給湯栓１７に給湯する給湯管、１８は給湯混合弁１５の直後の給湯管１６に設けられ給湯混合弁１５で混合された湯の温度を検出する給湯温度センサ、１９は給湯する湯水の量をカウントする流量カウンタである。 14 is a water supply bypass pipe that branches off from the water supply pipe 7 and bypasses the hot water storage tank 2, and 15 is a hot water supply mixture that mixes the hot water from the hot water discharge pipe 6 and the water from the water supply bypass pipe 14 into hot water at a hot water supply set temperature. Reference numeral 16 denotes a hot water supply pipe for supplying hot water mixed by the hot water supply mixing valve 15 to a hot water tap 17 provided in a kitchen or a bathroom, and 18 denotes a hot water supply mixing valve provided in a hot water supply pipe 16 immediately after the hot water supply mixing valve 15. 15 is a hot water temperature sensor for detecting the temperature of the hot water mixed at 15, and 19 is a flow rate counter for counting the amount of hot water to be supplied.

前記ヒートポンプユニット３は、凝縮器としての前記水冷媒熱交換器４と冷媒を圧縮する回転数可変の圧縮機２０と電子膨張弁２１と強制空冷式の蒸発器としての空気熱交換器２２で構成されたヒートポンプ回路２３と、空気熱交換器２２に送風する室外ファン２４と、前記ヒートポンプユニット３を制御するヒーポン制御部２５とを備えており、ヒートポンプ回路２３内には冷媒として二酸化炭素が用いられて超臨界ヒートポンプサイクルを構成しているものである。 The heat pump unit 3 includes the water-refrigerant heat exchanger 4 as a condenser, a variable-speed compressor 20 that compresses the refrigerant, an electronic expansion valve 21, and an air heat exchanger 22 as a forced air-cooled evaporator. The heat pump circuit 23, the outdoor fan 24 that blows air to the air heat exchanger 22, and a heat pump control unit 25 that controls the heat pump unit 3 are used. Carbon dioxide is used as a refrigerant in the heat pump circuit 23. This constitutes a supercritical heat pump cycle.

２６は貯湯タンク２の側面上下方向に複数配設され貯湯温水の温度を検出する貯湯温度検出手段としての貯湯温度センサで、この実施形態では上から順に２６ａ、２６ｂ、２６ｃ、２６ｄ、２６ｅの５つの貯湯温度センサ２６が配設され、この貯湯温度センサ２６が検出する温度情報によって、貯湯タンク２内にどれだけの熱量が残っているか検知し、そして貯湯タンク２内の上下方向の温度分布を検知するものである。 A plurality of hot water storage temperature sensors 26 are provided in the vertical direction of the side surface of the hot water storage tank 2 to detect the temperature of the hot water storage hot water. In this embodiment, the hot water storage temperature sensors 26a, 26b, 26c, 26d, and 26e are arranged in order from the top. Two hot water storage temperature sensors 26 are arranged, the amount of heat remaining in the hot water storage tank 2 is detected based on temperature information detected by the hot water storage temperature sensor 26, and the temperature distribution in the vertical direction in the hot water storage tank 2 is determined. It is something to detect.

２７は加熱循環回路１１の往き管８途中で、貯湯タンク２と循環ポンプ１０との間に備えられた切替弁で、通常時は貯湯タンク２と水冷媒熱交換器４の連通とし、貯湯タンク２からの湯水を循環ポンプ１０の駆動で水冷媒熱交換器４に送り、該水冷媒熱交換器４の熱交換で高温となった湯水を戻り管９を介して貯湯タンク２上部に戻すもので、断水時には接続されている逆止弁２８付きの補助管２９と、往き管８の一部を介して循環ポンプ１０と連通すると共に、戻り管９の途中に備えた戻り三方弁３０を切替て、該戻り管９の途中から貯湯タンク２底部に連通した戻りバイパス管３１を介して該貯湯タンク２底部に戻るようにしたものであり、災害等による断水時に、バケツＡに入った水道水以外の水（給水車からの水、井戸水等）を補助管２９→往き管８の一部→循環ポンプ１０→水冷媒熱交換器４→戻り管９の一部→戻りバイパス管３１→貯湯タンク２底部へと順に流れて該貯湯タンク２底部から貯水するものである。 Reference numeral 27 denotes a switching valve provided between the hot water storage tank 2 and the circulation pump 10 in the middle of the outgoing pipe 8 of the heating circulation circuit 11, which normally communicates with the hot water storage tank 2 and the water / refrigerant heat exchanger 4. The hot water from 2 is sent to the water / refrigerant heat exchanger 4 by driving the circulation pump 10, and hot water that has become hot due to the heat exchange of the water / refrigerant heat exchanger 4 is returned to the upper part of the hot water storage tank 2 via the return pipe 9 Thus, when the water is shut off, the auxiliary pipe 29 with the check valve 28 connected to the circulating pump 10 through a part of the forward pipe 8 and the return three-way valve 30 provided in the middle of the return pipe 9 are switched. The return water is returned from the middle of the return pipe 9 to the bottom of the hot water storage tank 2 via the return bypass pipe 31 communicating with the bottom of the hot water storage tank 2, and the tap water that has entered the bucket A at the time of water outage due to a disaster or the like. Subsidized water (water from water trucks, well water, etc.) 29 → Part of the forward pipe 8 → circulation pump 10 → water refrigerant heat exchanger 4 → part of the return pipe 9 → return bypass pipe 31 → the bottom of the hot water storage tank 2 and stores water from the bottom of the hot water storage tank 2 It is.

前記リモコン５は、設定温度やエラー情報等を表示する表示部３２と、給湯設定温度を設定する給湯温度設定スイッチ３３と、風呂設定温度を設定する風呂温度設定スイッチ３４と、貯湯タンク２内の湯水をヒートポンプユニット３で沸き上げるための運転モードを選択して操作するものであって、各種運転モード、例えば貯湯タンク２内に大容量の貯湯量を所望する満タンモード、過去の使用湯量の実績に応じた貯湯量を所望するおまかせモード、電力安価な深夜時間帯のみ沸き上げを行う深夜のみモード、直ぐに沸き上げ運転を開始させる沸き上げモード、災害等による断水時に貯湯タンク２内に底部から水道水以外の水を貯水させる緊急貯水モードのうち何れかを選択する運転モード選択スイッチ３５と、貯湯タンク２内の湯水を沸き増しする沸き増し量を「満タン」、「１００Ｌ」、または「５０Ｌ」と手動で切替えて選択し沸き増し運転を行なわせるための沸き増しスイッチ３６とが設けられているものである。 The remote controller 5 includes a display unit 32 for displaying a set temperature, error information, and the like, a hot water supply temperature setting switch 33 for setting a hot water supply set temperature, a bath temperature setting switch 34 for setting a bath set temperature, and a hot water storage tank 2. The operation mode for boiling hot water with the heat pump unit 3 is selected and operated, and various operation modes, for example, a full tank mode in which a large amount of hot water is stored in the hot water storage tank 2, a past hot water amount Omakase mode that requires hot water storage according to actual results, only midnight mode that heats up only during midnight hours when power is inexpensive, boiling mode that starts boiling operation immediately, and hot water tank 2 from the bottom when there is a water outage due to a disaster, etc. An operation mode selection switch 35 for selecting any one of emergency water storage modes for storing water other than tap water, and boiling hot water in the hot water storage tank 2 "Full" and then you additional boiling amount, in which the reheating switch 36 for causing the selected reheating operated manually switched between "100L", or "50L" are provided.

３７はヒートポンプユニット３の駆動開始・停止制御や各種センサの入力を受けて各アクチュエータの駆動を制御するマイクロコンピュータを備えた制御部であり、リモコン５と無線または有線により接続されユーザーが自由に設定した各種運転モードに応じて各部を駆動制御すると共に、ヒーポン制御部２５と有線にて通信可能に接続されて沸き上げ目標温度および沸き上げ動作の発停の指示をヒーポン制御部２５へ送るものであり、特に緊急貯水モードでは、制御部３７によって切替弁２７と戻り三方弁３０が連通を切替られ、循環ポンプ１０の駆動も制御されるものであり、又この緊急貯水モードにより貯湯タンク２内に溜められた貯水は、使用者が必要を感じた時に、沸き上げモードにすれば、貯水は加熱循環回路１１を通常の循環をしてヒートポンプユニット３で加熱されて沸き上げられるもので、そして貯湯タンク２下部に連通した非常用栓３８を開くことにより、容易に給湯を得ることが出来るものである。 Reference numeral 37 denotes a control unit including a microcomputer for controlling the start and stop of the heat pump unit 3 and the input of various sensors to control the drive of each actuator. The control unit 37 is connected to the remote controller 5 by radio or wire and can be freely set by the user. Each unit is driven and controlled in accordance with the various operation modes, and is connected to the heat-pump control unit 25 so as to be communicable with a wire and sends a boiling target temperature and an instruction to start and stop the heating operation to the heat-pone control unit 25. In particular, in the emergency water storage mode, the control unit 37 switches the communication between the switching valve 27 and the return three-way valve 30, and the driving of the circulation pump 10 is also controlled. If the stored water is put into the boiling mode when the user feels necessary, the water is stored in the heating circulation circuit 11 in a normal circulation. To those are boiling is heated by the heat pump unit 3, and by opening the emergency plug 38 communicating with the hot water storage tank 2 bottom, in which can be obtained easily hot water.

３９は貯湯タンク２内の過圧を逃がす過圧逃し弁で、緊急貯水モード時は手動で開放されて貯湯タンク２内の空気を逃がし貯水を流入させるものであり、４０は給水の圧力を減圧する減圧弁、４１は給水の温度を検出する給水温度センサ、４２は給水管７を開閉する止水栓で、給水管７に設けた減圧弁３７より上流側に設けられているものである。また、４３は排水管で、一端が貯湯タンク２の底部に接続され、排水管４３の途中には排水管４３を開閉する排水栓４４を有しているものである。なお、地震等の災害発生により断水が発生した場合は、止水栓４２を閉めるものである。 39 is an overpressure relief valve for releasing the overpressure in the hot water storage tank 2, which is manually opened in the emergency water storage mode to release the air in the hot water storage tank 2 and let the stored water flow in, and 40 for reducing the pressure of the water supply water. The pressure reducing valve 41, a water supply temperature sensor for detecting the temperature of the water supply, 42 is a stop cock for opening and closing the water supply pipe 7, and is provided upstream of the pressure reduction valve 37 provided in the water supply pipe 7. A drain pipe 43 has one end connected to the bottom of the hot water storage tank 2 and a drain plug 44 that opens and closes the drain pipe 43 in the middle of the drain pipe 43. In addition, the water stopcock 42 is closed when the water outage occurs due to the occurrence of a disaster such as an earthquake.

次に、この発明の一実施形態の作動を説明する。
先ず、通常時での沸き上げについて説明すると、時間帯別契約電力の電力単価が安価な深夜時間帯（例えば２３：００）に達すると、制御部３７は沸き上げ制御を開始し、例えば、過去１週間の最大使用熱量や前日２３：００〜当日２３：００までの平均給水温度等から沸き上げ目標温度を自動で算出して設定し、貯湯温度センサ２６の検出する貯湯温度に基づき現在貯湯タンク２内に貯湯されている貯湯熱量を算出すると共に、沸き上げ開始時刻を算出する。そして、沸き上げ開始時刻に達するとヒートポンプユニット３を駆動させると共に循環ポンプ１０を駆動させ、貯湯タンク２の下部から湯水を取り出し往き管８を介して水冷媒熱交換器４で加熱して、戻り管９を介して貯湯タンク２の上部に沸き上げ目標温度に加熱した湯を戻すようにして、貯湯タンク２の上部から順次積層して高温の温水を貯湯していく。貯湯温度センサ２６が必要な熱量が貯湯されたことを検出すると、制御部３７はヒートポンプユニット３を停止すると共に循環ポンプ１０も停止して沸き上げ動作を終了するものである。 Next, the operation of one embodiment of the present invention will be described.
First, when the heating at the normal time is described, when the unit price of the contracted power by time zone reaches an inexpensive midnight time zone (for example, 23:00), the control unit 37 starts the boiling control. Based on the hot water storage temperature detected by the hot water storage temperature sensor 26, the boiling target temperature is automatically calculated and set based on the maximum amount of heat used for one week and the average water supply temperature from 23:00 to 23:00 on the previous day. 2 calculates the amount of hot water stored in hot water and calculates the boiling start time. Then, when the boiling start time is reached, the heat pump unit 3 is driven and the circulation pump 10 is driven, hot water is taken out from the lower part of the hot water storage tank 2, heated by the water refrigerant heat exchanger 4 through the forward pipe 8, and returned. The hot water heated up to the target temperature is returned to the upper part of the hot water storage tank 2 via the pipe 9, and the hot hot water is stored in order from the upper part of the hot water storage tank 2. When the hot water storage temperature sensor 26 detects that the necessary amount of heat has been stored, the control unit 37 stops the heat pump unit 3 and also the circulation pump 10 to end the boiling operation.

次に、この一実施形態の緊急貯水モードについて図３のフローチャートを用いて説明する。
ここでは、地震等の災害によって停電かつ断水が発生し、この停電かつ断水の期間に貯湯タンク２内の湯水を非常用栓３８を開いて生活用水として使用しなくなった後、数日後に、断水状態が続く中で電力が復旧した時の貯水から沸き上げを想定したものである。
先ず、過圧逃し弁３９を手動で開放すると共に、バケツＡに給水車からの水や井戸水等を入れ、そこに補助管２９の端部を差し込んで置く（ステップＳ１）、又このバケツＡは多数用意しても良いし、給水される毎に補給しても良いものである。 Next, the emergency water storage mode of this embodiment will be described with reference to the flowchart of FIG.
Here, a power outage and water outage occurred due to a disaster such as an earthquake, and the hot water in the hot water storage tank 2 was not used as domestic water by opening the emergency stop valve 38 during this power outage and water outage. It is assumed to boil from the stored water when the power is restored while the state continues.
First, the overpressure relief valve 39 is manually opened, and water from a water truck or well water is put into the bucket A, and the end of the auxiliary pipe 29 is inserted therein (step S1). A large number may be prepared or replenished every time water is supplied.

続いて、制御部３７は、リモコン５の運転モード選択スイッチ３５の手動操作によって緊急貯水モードが選択されたか否かを判断し（ステップＳ２）、緊急貯水モードが選択されたと判断すると、制御部３７は切替弁２７と戻り三方弁３０の連通をそれぞれ切替ると共に、循環ポンプ１０を駆動開始させる（ステップＳ３）。 Subsequently, the control unit 37 determines whether or not the emergency water storage mode is selected by a manual operation of the operation mode selection switch 35 of the remote controller 5 (step S2), and determines that the emergency water storage mode is selected. Switches the communication between the switching valve 27 and the return three-way valve 30 and starts driving the circulation pump 10 (step S3).

これによりバケツＡ内の給水は、補助管２９→往き管８の一部→循環ポンプ１０→水冷媒熱交換器４→戻り管９の一部→戻りバイパス管３１→貯湯タンク２底部へと順に流れて該貯湯タンク２底部から貯水されるものであり、このように貯湯タンク２底部からの貯水は、万一貯湯タンク２内に残湯があった場合に、上から給水すると温度成層が崩れるのでこのを防止して、この残湯を無駄にすることなく使用するようにしたものであり、そしてある程度貯水した所で、リモコン５の運転モード選択スイッチ３５の手動操作で、緊急貯水モードをキャンセルして貯水完了とし（ステップＳ４）、制御部３７が切替弁２７と戻り三方弁３０の連通を元の連通に戻すと共に、循環ポンプ１０の駆動を停止する（ステップＳ５）。 As a result, water in the bucket A is supplied to the auxiliary pipe 29 → part of the outgoing pipe 8 → circulation pump 10 → water refrigerant heat exchanger 4 → part of the return pipe 9 → return bypass pipe 31 → the bottom of the hot water storage tank 2 in this order. The hot water is stored from the bottom of the hot water storage tank 2, and the water storage from the bottom of the hot water storage tank 2 will cause the temperature stratification to collapse if water is supplied from above in the event that there is residual hot water in the hot water storage tank 2. Therefore, this remaining hot water is used without wasting it, and when the water is stored to some extent, the emergency water storage mode is canceled by manual operation of the operation mode selection switch 35 of the remote controller 5. Then, the water storage is completed (step S4), the control unit 37 returns the communication of the switching valve 27 and the return three-way valve 30 to the original communication, and stops the driving of the circulation pump 10 (step S5).

そして次に、過圧逃し弁３９を手動で閉じた後、同じくリモコン５の運転モード選択スイッチ３５の手動操作で、沸き上げモードが選択されたか否かを判断し（ステップＳ６）、沸き上げモードが選択されたと判断すると、制御部３７は切替弁２７と戻り三方弁３０の連通はすでに元に戻っているので、ヒートポンプユニット３及び循環ポンプ１０を駆動開始させて、貯湯タンク２内の貯水を従来通り沸き上げるものである（ステップＳ７）。 Next, after manually closing the overpressure relief valve 39, it is determined whether or not the boiling mode has been selected by manual operation of the operation mode selection switch 35 of the remote controller 5 (step S6). When the control unit 37 determines that the communication between the switching valve 27 and the return three-way valve 30 has already been restored, the heat pump unit 3 and the circulation pump 10 are started to drive the water stored in the hot water storage tank 2. It boils as usual (step S7).

更にこの沸き上げられた貯湯タンク２内の温水は、必要に応じて非常用栓３８を開いて使用することが出来るものであり、断水時にバケツＡから自動給水して沸き上げて使用出来るので、極めてありがたく使用勝手が良く、長期に渡って安心して生活していられるものである。 Furthermore, the heated hot water in the hot water storage tank 2 can be used by opening the emergency stopper 38 as necessary, and can be used by automatically supplying water from the bucket A when boiling down, Thankfully, it is easy to use and can be used safely for a long time.

２貯湯タンク
３加熱手段（ヒートポンプユニット）
４加熱熱交換器（水冷媒熱交換器）
５リモコン
８往き管
９戻り管
１０循環ポンプ
２７切替弁
２９補助管
３０戻り三方弁
３１戻りバイパス管
３７制御部 2 Hot water storage tank 3 Heating means (heat pump unit)
4 Heating heat exchanger (water refrigerant heat exchanger)
5 Remote control 8 Forward pipe 9 Return pipe 10 Circulation pump 27 Switching valve 29 Auxiliary pipe 30 Return three-way valve 31 Return bypass pipe 37 Control unit

Claims

湯水を貯湯する貯湯タンクと、該貯湯タンク内の湯水を加熱する加熱手段と、前記貯湯タンクの下部から前記加熱手段内に収納された加熱熱交換器に向かう往き管と、該往き管途中に設けられ湯水を循環させる循環ポンプと、前記加熱熱交換器から前記貯湯タンクの上部に戻る戻り管と、前記往き管の貯湯タンクと循環ポンプとの間に切替弁を介して接続された補助管と、前記戻り管途中で戻り三方弁を介して貯湯タンク底部に連通する戻りバイパス管と、前記循環ポンプを制御し貯湯タンク内の湯水を加熱熱交換器に循環させる沸き上げモードを備えた制御部とを備えたものに於いて、前記制御部には断水時に前記切替弁を補助管側に切替ると共に、戻り三方弁を戻りバイパス管側の連通として、循環ポンプを駆動させ補助管から吸引した水を戻りバイパス管を介して貯湯タンク底部から貯水する緊急貯水モードを備えた事を特徴とする貯湯式給湯装置。 A hot water storage tank for storing hot water, heating means for heating the hot water in the hot water storage tank, a forward pipe from the lower part of the hot water storage tank to a heating heat exchanger housed in the heating means, and in the middle of the forward pipe A circulation pump provided for circulating hot water, a return pipe returning from the heating heat exchanger to the top of the hot water storage tank, and an auxiliary pipe connected via a switching valve between the hot water storage tank of the forward pipe and the circulation pump A return bypass pipe that communicates with the bottom of the hot water tank via a return three-way valve in the middle of the return pipe, and a heating mode that controls the circulation pump to circulate hot water in the hot water tank to the heating heat exchanger The control unit switches the switching valve to the auxiliary pipe side when water is shut off, and the return three-way valve is connected to the return bypass pipe side to drive the circulation pump and suck from the auxiliary pipe. did Hot water storage type water heater, characterized in that with an emergency water storage mode in which the water from the hot water storage tank bottom through the bypass pipe returning the.