JP5763496B2 - Hot water storage water heater - Google Patents

Hot water storage water heater Download PDF

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JP5763496B2
JP5763496B2 JP2011221506A JP2011221506A JP5763496B2 JP 5763496 B2 JP5763496 B2 JP 5763496B2 JP 2011221506 A JP2011221506 A JP 2011221506A JP 2011221506 A JP2011221506 A JP 2011221506A JP 5763496 B2 JP5763496 B2 JP 5763496B2
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hot water
bath
bathtub
pouring
pipe
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JP2013083360A (en
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大一郎 佐藤
大一郎 佐藤
基 阿部
基 阿部
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Corona Corp
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この発明は、浴槽への注湯を停止するときの圧力上昇を低減させ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 that reduces an increase in pressure when pouring hot water into a bathtub is stopped.

従来のこの種の貯湯式給湯装置においては、図4に示すように、湯水を貯湯する貯湯タンク101と、貯湯タンク101内の湯水を加熱する加熱手段102と、貯湯タンク101の下部に減圧弁103を介して接続され貯湯タンク101に給水する給水管104と、貯湯タンク101上部に接続された出湯管105と、給水管104から分岐した給水バイパス管106と、出湯管105からの湯と給水バイパス管106からの水を混合して設定温度の湯とする混合弁107と、混合弁107で混合された設定温度の湯を台所や洗面所等に設けられた給湯栓108に供給する給湯管109と、浴槽110と、浴槽110の浴槽水を貯湯タンク101内の湯水と熱交換させる風呂熱交換器111と、浴槽110と風呂熱交換器111とを接続する風呂往き管112および風呂戻り管113からなる風呂循環回路114と、風呂戻り管113に備えられ浴槽110の浴槽水を風呂循環回路114に循環させる風呂循環ポンプ115と、風呂熱交換器111をバイパスして風呂往き管112と風呂戻り管113とを接続する風呂バイパス管116と、風呂バイパス管116と風呂戻り管113との接続部に設けられ、風呂戻り管113のみから浴槽110に注湯させる片搬送状態と風呂往き管112と風呂戻り管113との両方から浴槽110に注湯させる両搬送状態とに切換可能な風呂三方弁117と、風呂戻り管113に接続され貯湯タンク101内の湯水を浴槽110へ注湯する湯張り管118と、湯張り管118を開閉する湯張り電磁弁119とを備え、浴槽110へ設定量の湯張りを行う場合、湯張り電磁弁119を開いて浴槽110への湯張りを開始し、風呂三方弁117を両搬送状態として浴槽110に注湯して、設定量より所定量少ない予め設定された規定量に達したら、風呂三方弁117を片搬送状態として風呂戻り管113のみから浴槽110に注湯し、設定量まで浴槽110に注湯したら、湯張り電磁弁119を閉じて浴槽110への湯張りを終了するものがあった。(例えば、特許文献1参照。)   In a conventional hot water storage type hot water supply apparatus of this type, as shown in FIG. 4, a hot water storage tank 101 for storing hot water, heating means 102 for heating the hot water in the hot water storage tank 101, and a pressure reducing valve at the lower part of the hot water storage tank 101. A hot water supply pipe 104 connected to the hot water storage tank 101 connected to the hot water storage tank 101, a hot water supply pipe 105 connected to the upper part of the hot water storage tank 101, a water supply bypass pipe 106 branched from the water supply pipe 104, and hot water and water supply from the hot water supply pipe 105. A mixing valve 107 that mixes water from the bypass pipe 106 to obtain hot water at a set temperature, and a hot water supply pipe that supplies hot water at a set temperature mixed by the mixing valve 107 to a hot water tap 108 provided in a kitchen or a washroom. 109, a tub 110, a bath heat exchanger 111 that exchanges heat between the bathtub water in the bathtub 110 and hot water in the hot water storage tank 101, and the bathtub 110 and the bath heat exchanger 111 are connected to each other. Bypass the bath circulation circuit 114 composed of the return pipe 112 and the bath return pipe 113, the bath circulation pump 115 provided in the bath return pipe 113 and circulating the bath water of the bathtub 110 to the bath circulation circuit 114, and the bath heat exchanger 111. Then, a bath bypass pipe 116 connecting the bath return pipe 112 and the bath return pipe 113, and a connecting portion between the bath bypass pipe 116 and the bath return pipe 113 are provided, and the bath 110 is poured only from the bath return pipe 113. A bath three-way valve 117 that can be switched between a single conveying state and a both conveying state in which the bath 110 is poured from both the bath outlet pipe 112 and the bath return pipe 113, and hot water in the hot water storage tank 101 connected to the bath return pipe 113. A hot water filling pipe 118 for pouring water into the bathtub 110 and a hot water solenoid valve 119 for opening and closing the hot water filling pipe 118. When the hot water filling solenoid valve 119 is opened, the hot water filling to the bathtub 110 is started, and the hot water is poured into the bathtub 110 with the bath three-way valve 117 being in both transport states. When the amount reaches, the bath three-way valve 117 is placed in a single conveying state to pour hot water into the bathtub 110 only from the bath return pipe 113, and when the hot water is poured into the bathtub 110 to the set amount, the hot water solenoid valve 119 is closed to supply hot water to the bathtub 110. There was something that finished the tension. (For example, refer to Patent Document 1.)

特開2008−128528号公報JP 2008-128528 A

ところで、近年、住宅の2階や3階の高所であっても十分な流量で給湯ができるようにとのニーズから、減圧弁103の設定圧力を従来よりも高く設定するものが増えてきており、この減圧弁103の設定圧力を高く設定した貯湯式給湯装置において、上述のような浴槽110への湯張りを行った場合、浴槽110への注湯を終了する時は風呂三方弁117は片搬送状態であり、その状態で湯張り電磁弁119を閉じると、その瞬間、風呂戻り管113側にかかる圧力は水撃によって急激に上昇し、それにより風呂戻り管113に備えられた風呂循環ポンプ115等の機能部品の破損、風呂循環回路114を構成する配管の外れや損傷による水漏れ等が発生するおそれがあった。   By the way, in recent years, there has been an increase in the pressure setting of the pressure reducing valve 103 higher than before due to the need to supply hot water at a sufficient flow rate even at high places on the second and third floors of a house. In the hot water storage type hot water supply apparatus in which the set pressure of the pressure reducing valve 103 is set high, when the hot water filling to the bathtub 110 is performed as described above, the bath three-way valve 117 is When the hot water solenoid valve 119 is closed in this state, the pressure applied to the bath return pipe 113 is suddenly increased by water hammer, and the bath circulation provided in the bath return pipe 113 is instantaneously increased. There was a risk that functional parts such as the pump 115 would be damaged, or the water constituting the bath circulation circuit 114 may be disconnected or leaked due to damage.

そこで、本発明は、浴槽110への注湯を停止する際に風呂循環ポンプ115を備えた側の風呂循環回路114や風呂循環ポンプ115等の機能部品に加わる水撃による圧力を低減させ、風呂循環ポンプ115等の機能部品の破損、風呂循環回路114を構成する配管の外れや損傷による水漏れ等を防止することができる貯湯式給湯装置を提供することを目的とするものである。   Therefore, the present invention reduces the pressure caused by water hammer applied to functional parts such as the bath circulation circuit 114 and the bath circulation pump 115 on the side provided with the bath circulation pump 115 when stopping the pouring of water into the bathtub 110, It is an object of the present invention to provide a hot water storage type hot water supply apparatus capable of preventing breakage of functional parts such as the circulation pump 115, leakage of piping constituting the bath circulation circuit 114, and water leakage due to damage.

そこで、この発明は上記課題を解決するために、特に請求項1ではその構成を、湯水を貯湯する貯湯タンクと、浴槽の浴槽水を前記貯湯タンク内の湯水と熱交換して加熱する風呂熱交換器と、前記浴槽と前記風呂熱交換器とを接続する風呂往き管および風呂戻り管から成る風呂循環回路と、前記風呂循環回路に設けられ浴槽水を循環させる風呂循環ポンプと、前記風呂循環回路に接続され前記貯湯タンク内の湯水を前記浴槽へ注湯する湯張り管と、該湯張り管を開閉する開閉弁と、前記風呂循環回路に設けられ前記風呂循環ポンプが設けられた側の前記風呂循環回路のみから前記浴槽に注湯させることができる片搬送状態と、前記風呂往き管と前記風呂戻り管との両方から前記浴槽に注湯させることができる両搬送状態とに切換可能な流路切換手段とを備え、前記湯張り管から前記風呂循環回路を介して前記浴槽へ注湯を行う貯湯式給湯装置において、少なくとも前記開閉弁を閉弁し前記浴槽への注湯を停止する際は、前記流路切換手段を前記両搬送状態とし、前記開閉弁を開弁し前記浴槽への注湯を開始する際は、前記流路切換手段を前記両搬送状態とし、前記浴槽へ設定量の注湯を行う場合、注湯を開始し前記設定量より所定量少ない予め設定された第1規定量に到達するまでは、前記流路切換手段を両搬送状態とし、前記第1規定量に到達したら、前記流路切換手段を前記両搬送状態から前記片搬送状態に切り換え、前記設定量より所定量少なく前記第1規定量より所定量多い予め設定された第2規定量に到達するまでは、前記流路切換手段を片搬送状態とし、前記第2規定量に到達したら、前記流路切換手段を前記片搬送状態から前記両搬送状態に切り換え、前記設定量に到達したら、前記開閉弁を閉弁するものとした。 Therefore, in order to solve the above-mentioned problems, the present invention particularly has a configuration according to claim 1 in which a hot water storage tank for storing hot water and a bath heat for heating the bathtub water in the bathtub by exchanging heat with the hot water in the hot water storage tank. A bath circulation circuit composed of an exchanger, a bath outlet pipe and a bath return pipe connecting the bathtub and the bath heat exchanger, a bath circulation pump provided in the bath circulation circuit and circulating bath water, and the bath circulation A hot water pipe connected to a circuit for pouring hot water in the hot water storage tank into the bathtub, an on-off valve for opening and closing the hot water pipe, and a side provided with the bath circulation pump provided in the bath circulation circuit Switchable between a single conveying state in which hot water can be poured into the bathtub only from the bath circulation circuit and a double conveying state in which hot water can be poured into the bathtub from both the bath outlet pipe and the bath return pipe. Channel cut In a hot water storage type hot water supply apparatus that pours water into the bathtub through the bath circulation circuit from the hot water filled pipe, when closing at least the on-off valve and stopping pouring into the bathtub, When the flow path switching means is set to the both conveying state , the opening / closing valve is opened and pouring of the hot water into the bathtub is started, the flow path switching means is set to the both conveying state and a set amount is poured into the bathtub. When hot water is poured, the flow path switching means is set to both transport states until the first specified amount that is set in advance by a predetermined amount less than the set amount is reached, and when the first specified amount is reached. The flow path switching means is switched from the both conveyance state to the one-side conveyance state until the second predetermined amount set in advance is smaller than the set amount by a predetermined amount and larger by the predetermined amount than the first predetermined amount. The flow path switching means is set to a single conveying state, and the second regulation Upon reaching, switching the both conveyance state the flow path switching means from the piece transfer state, upon reaching the set amount, and shall be closed the opening and closing valve.

また、請求項2では、湯水を貯湯する貯湯タンクと、浴槽の浴槽水を前記貯湯タンク内の湯水と熱交換して加熱する風呂熱交換器と、前記浴槽と前記風呂熱交換器とを接続する風呂往き管および風呂戻り管から成る風呂循環回路と、前記風呂循環回路に設けられ浴槽水を循環させる風呂循環ポンプと、前記風呂循環回路に接続され前記貯湯タンク内の湯水を前記浴槽へ注湯する湯張り管と、該湯張り管を開閉する開閉弁と、前記風呂循環回路に設けられ前記風呂循環ポンプが設けられた側の前記風呂循環回路のみから前記浴槽に注湯させることができる片搬送状態と、前記風呂往き管と前記風呂戻り管との両方から前記浴槽に注湯させることができる両搬送状態とに切換可能な流路切換手段とを備え、前記湯張り管から前記風呂循環回路を介して前記浴槽へ注湯を行う貯湯式給湯装置であって、前記流路切換手段を片搬送状態として前記浴槽へ注湯を行う工程を有するものにおいて、前記浴槽への注湯を停止する際は、前記流路切換手段を前記両搬送状態としてから前記開閉弁を閉弁するようにしたものとした。 Further, in claim 2, a hot water storage tank for storing hot water, a bath heat exchanger that heats the bathtub water in the bathtub by exchanging heat with the hot water in the hot water storage tank, and the bathtub and the bath heat exchanger are connected. A bath circulation circuit comprising a bath return pipe and a bath return pipe, a bath circulation pump provided in the bath circulation circuit for circulating bath water, and hot water in the hot water storage tank connected to the bath circulation circuit is poured into the bathtub. Hot water can be poured into the bathtub only from the hot water filling tube, the on-off valve that opens and closes the hot water filling tube, and the bath circulation circuit that is provided in the bath circulation circuit and provided with the bath circulation pump. And a flow path switching means switchable between a single conveying state and both conveying states capable of pouring into the bathtub from both the bath outlet pipe and the bath return pipe, and from the hot water filled pipe to the bath Through the circulation circuit In the hot water storage type hot water supply apparatus for pouring hot water into the bathtub, and having the step of pouring hot water into the bathtub with the flow path switching means in a single conveying state, when stopping pouring of water into the bathtub The opening / closing valve is closed after the flow path switching means is in the both conveying state .

また、請求項3では、前記浴槽への注湯を開始する際は、前記流路切換手段を前記両搬送状態としてから前記開閉弁を開弁するようにしたものとした。 According to a third aspect of the present invention, when the pouring of the hot water into the bathtub is started, the opening / closing valve is opened after the flow path switching means is in the both conveying state .

この発明の請求項1によれば、少なくとも開閉弁を閉弁し浴槽への注湯を停止する際は、流路切換手段を両搬送状態としたことで、開閉弁を閉弁した瞬間に生じる水撃による圧力上昇を風呂往き管および風呂戻り管の両方に分散させ低減させることができ、風呂循環ポンプ等の機能部品の破損、風呂循環回路を構成する配管の外れや損傷による水漏れを防止することができ、さらに、開閉弁を開弁し浴槽への注湯を開始する際は、流路切換手段を両搬送状態としたことで、開閉弁を開弁した瞬間に生じる水撃による圧力上昇を風呂往き管および風呂戻り管の両方に分散させ低減させることができ、風呂循環ポンプ等の機能部品の破損、風呂循環回路を構成する配管の外れや損傷による水漏れを防止することができ、その上、浴槽へ設定量の注湯を行う場合、注湯を開始し設定量より所定量少ない予め設定された第1規定量に到達するまでは、流路切換手段を両搬送状態として、風呂往き管および風呂戻り管の両方から浴槽に注湯することで、注湯開始時の開閉弁を開弁した瞬間に生じる水撃による圧力上昇を風呂往き管および風呂戻り管の両方に分散させ低減させることができ、風呂循環ポンプ等の機能部品の破損、風呂循環回路を構成する配管の外れや損傷による水漏れを防止することができると共に、注湯時間の短縮ができ、第1規定量に到達したら、流路切換手段を両搬送状態から片搬送状態に切り換え、設定量より所定量少なく第1規定量より所定量多い予め設定された第2規定量に到達するまでは、流路切換手段を片搬送状態として、風呂戻り管のみから浴槽に注湯することで、風呂循環ポンプ等の近傍に残存するエアを押し出して風呂戻り管のエア抜きが確実に行われ、第2規定量に到達したら、流路切換手段を片搬送状態から両搬送状態に切り換え、設定量に到達したら、流路切換手段を両搬送状態としたままで開閉弁を閉弁することで、開閉弁を閉弁した瞬間に生じる水撃による圧力上昇を風呂往き管および風呂戻り管の両方に分散させ低減させることができ、風呂循環ポンプ等の機能部品の破損、風呂循環回路を構成する配管の外れや損傷による水漏れを防止することができるものである。 According to the first aspect of the present invention, at least when the on-off valve is closed and the pouring of the hot water into the bathtub is stopped, the flow path switching means is brought into the double-conveyance state, so that it occurs at the moment when the on-off valve is closed. Pressure rise due to water hammer can be distributed and reduced in both the bath return pipe and the bath return pipe, preventing damage to functional parts such as the bath circulation pump and water leakage due to disconnection or damage of the pipes that make up the bath circulation circuit Furthermore, when opening the on-off valve and starting pouring water into the bathtub, the pressure due to water hammer generated at the moment when the on-off valve is opened by setting the flow path switching means to both conveying states. The rise can be distributed and reduced in both the bath return pipe and the bath return pipe, preventing damage to functional parts such as the bath circulation pump and water leakage due to disconnection or damage of the pipes that make up the bath circulation circuit. In addition, note the set amount to the bathtub When the hot water is poured, the flow path switching means is set in both transport states until the first predetermined amount which is a predetermined amount less than the set amount is reached, and the bathtub is drawn from both the bath outlet pipe and the bath return pipe. By pouring hot water into the bath, it is possible to disperse and reduce the pressure increase due to water hammer generated at the moment when the on-off valve at the start of pouring is opened, to both the bath outlet pipe and the bath return pipe. It is possible to prevent water leakage due to breakage of functional parts and disconnection or damage of the pipes constituting the bath circulation circuit, and to shorten the pouring time. The state is switched from the state to the single conveyance state, and the flow path switching means is set to the single conveyance state until only the bath return pipe is reached until a preset second predetermined amount that is a predetermined amount smaller than the set amount and larger than the first predetermined amount is reached. Pour into the bathtub Then, the air remaining in the vicinity of the bath circulation pump etc. is pushed out and the air of the bath return pipe is surely removed, and when the second specified amount is reached, the flow path switching means is switched from the single conveying state to the double conveying state. When the set amount is reached, the on-off valve is closed while the flow path switching means is in both conveying states, so that the pressure increase due to water hammer generated at the moment when the on-off valve is closed is reduced to the bath outlet pipe and the bath return pipe. It is possible to prevent the leakage of water due to breakage of functional parts such as a bath circulation pump and disconnection or damage of piping constituting the bath circulation circuit.

また、請求項2によれば、流路切換手段を片搬送状態として浴槽へ注湯を行う工程を有するものにおいて、浴槽への注湯を停止する際は、流路切換手段を両搬送状態としてから開閉弁を閉弁するようにしたことで、開閉弁を閉弁した瞬間に生じる水撃による圧力上昇を風呂往き管および風呂戻り管の両方に分散させ低減させることができ、風呂循環ポンプ等の機能部品の破損、風呂循環回路を構成する配管の外れや損傷による水漏れを防止することができるものである。 According to the second aspect of the present invention, in the step of pouring water into the bathtub with the flow path switching means in the single conveyance state, when stopping pouring into the bathtub, the flow path switching means is in both conveyance states. Since the on / off valve is closed, the pressure increase due to water hammer generated at the moment when the on / off valve is closed can be dispersed and reduced in both the bath outlet pipe and the bath return pipe. It is possible to prevent water leakage due to breakage of functional parts, disconnection of pipes constituting the bath circulation circuit, and damage.

また、請求項3によれば、浴槽への注湯を開始する際は、流路切換手段を両搬送状態としてから開閉弁を開弁するようにしたことで、開閉弁を開弁した瞬間に生じる水撃による圧力上昇を風呂往き管および風呂戻り管の両方に分散させ低減させることができ、風呂循環ポンプ等の機能部品の破損、風呂循環回路を構成する配管の外れや損傷による水漏れを防止することができるものである。 According to the third aspect of the present invention, when pouring water into the bathtub is started, the opening / closing valve is opened after the flow path switching means is set to the both conveying state, so that the opening / closing valve is opened at the moment. It is possible to reduce the pressure rise caused by water hammer by distributing it to both the bath return pipe and the bath return pipe, and damage to functional parts such as the bath circulation pump and water leakage due to disconnection or damage of the piping constituting the bath circulation circuit. It can be prevented.

この発明の貯湯式給湯装置の一実施形態の概略構成図。The schematic block diagram of one Embodiment of the hot water storage type hot water supply apparatus of this invention. 同一実施形態の風呂三方弁の動作説明図。Operation | movement explanatory drawing of the bath three-way valve of the same embodiment. 同一実施形態の湯張り動作を示すフローチャート。The flowchart which shows the hot water filling operation | movement of the same embodiment. 従来の貯湯式給湯装置の概略構成図。The schematic block diagram of the conventional hot water storage type hot-water supply apparatus.

次に、本発明の一実施形態について図1に基づき説明する。
1は湯水を貯湯する貯湯タンク2を有した貯湯タンクユニット、3は台所や洗面所等に設けられた給湯栓、4はこの貯湯式給湯装置を遠隔操作するリモコン、5は浴槽である。
Next, an embodiment of the present invention will be described with reference to FIG.
1 is a hot water storage tank unit having a hot water storage tank 2 for storing hot water, 3 is a hot water tap provided in a kitchen, a washroom, etc., 4 is a remote controller for remotely operating the hot water storage type hot water supply device, and 5 is a bathtub.

6は貯湯タンク2の下部に接続され貯湯タンク2に給水する給水管、7は給水管6途中に設けられ給水圧を所定の圧力まで減圧する減圧弁で、ここでは減圧弁7の設定圧力を260kPaの高圧設定とする。また、8は貯湯タンク2の上部に接続され貯湯タンク2の上部から高温の湯を取り出す出湯管である。   A water supply pipe 6 is connected to the lower part of the hot water storage tank 2 to supply water to the hot water storage tank 2, and 7 is a pressure reducing valve provided in the middle of the water supply pipe 6 to reduce the water supply pressure to a predetermined pressure. The high pressure setting is 260 kPa. A hot water discharge pipe 8 is connected to the upper part of the hot water storage tank 2 and takes out hot water from the upper part of the hot water storage tank 2.

9は減圧弁7より下流側で給水管6から分岐した第1給水バイパス管、10は出湯管8からの高温の湯と第1給水バイパス管9からの水とを設定温度になるように内部の弁体(図示せず)の弁開度を調整して混合する給湯混合弁、11は給湯混合弁10で混合された湯を給湯栓3に供給する給湯管、12は給湯混合弁10で混合後の湯の温度を検出する給湯温度センサ、13は給湯流量をカウントする給湯流量センサである。   Reference numeral 9 denotes a first water supply bypass pipe branched from the water supply pipe 6 on the downstream side of the pressure reducing valve 7, and 10 denotes internal hot water from the hot water discharge pipe 8 and water from the first water supply bypass pipe 9 so as to reach a set temperature. A hot water mixing valve that adjusts and mixes the valve opening of a valve body (not shown), 11 is a hot water supply pipe that supplies hot water mixed by the hot water mixing valve 10 to the hot water tap 3, and 12 is a hot water mixing valve 10 A hot water supply temperature sensor 13 detects the temperature of the hot water after mixing, and 13 is a hot water supply flow rate sensor for counting the hot water supply flow rate.

14は貯湯タンク2内の上部に配置され、浴槽5の浴槽水を貯湯タンク2内の湯水と熱交換して加熱するためのステンレス製の蛇管よりなる風呂熱交換器、15は浴槽5と風呂熱交換器14とを接続する風呂往き管16および風呂戻り管17から成る風呂循環回路、18は風呂戻り管17に備えられ、浴槽5内の浴槽水を風呂戻り管17を介して風呂熱交換器14に送り、風呂熱交換器14を通過した浴槽水を風呂往き管16を介して浴槽5内に戻すよう循環させる風呂循環ポンプである。   A bath heat exchanger 14 is arranged at the upper part in the hot water storage tank 2 and is made of a stainless steel tube for heat exchange by heating the bath water of the bath 5 with hot water in the hot water storage tank 2, and 15 is a bath 5 and a bath. A bath circulation circuit 18 comprising a bath outlet pipe 16 and a bath return pipe 17 connected to the heat exchanger 14 is provided in the bath return pipe 17, and the bath water in the bathtub 5 is exchanged with the bath heat via the bath return pipe 17. It is a bath circulation pump that circulates the bathtub water that has been sent to the vessel 14 and passed through the bath heat exchanger 14 so as to be returned to the bathtub 5 through the bath outlet pipe 16.

19は風呂戻り管17に設けられ流水の有無を検知する流水スイッチ、20は風呂戻り管17に設けられ浴槽5から流出し風呂熱交換器14に流入する浴槽水の温度を検出する風呂温度センサ、21は風呂戻り管17の浴槽5に近い位置に設けられ浴槽水の水圧から浴槽5内の水位を検出する水位検出手段としての水位センサである。   Reference numeral 19 denotes a running water switch provided on the bath return pipe 17 for detecting the presence or absence of running water. Reference numeral 20 denotes a bath temperature sensor provided on the bath return pipe 17 for detecting the temperature of the bath water flowing out of the bathtub 5 and flowing into the bath heat exchanger 14. , 21 is a water level sensor provided as a water level detecting means provided near the bathtub 5 of the bath return pipe 17 to detect the water level in the bathtub 5 from the water pressure of the bathtub water.

22は風呂熱交換器14をバイパスして風呂往き管16と風呂戻り管17とを接続する風呂バイパス管、23は風呂バイパス管22と風呂戻り管17との接続部に設けられ、風呂戻り管17のみから浴槽5に注湯させる片搬送状態と風呂往き管16と風呂戻り管17との両方から浴槽5に注湯させる両搬送状態とに切換可能な電動三方弁よりなる流路切換手段としての風呂三方弁である。   22 is a bath bypass pipe that bypasses the bath heat exchanger 14 and connects the bath outlet pipe 16 and the bath return pipe 17, and 23 is provided at the connection between the bath bypass pipe 22 and the bath return pipe 17, and the bath return pipe As a flow path switching means comprising an electric three-way valve capable of switching between a single conveying state in which only the bath 17 is poured into the bathtub 5 and a both conveying state in which the bath 5 is poured from both the bath outlet pipe 16 and the bath return pipe 17. This is a three-way valve.

前記風呂三方弁23は、流入側の接続口23aに風呂戻り管17の浴槽5側を接続し、2つの流出側の接続口23b、23cのうち、一方の接続口23bには風呂熱交換器14の入口側を接続し、他方の接続口23cには風呂バイパス管22を接続し、電動モータ(図示せず)の駆動で内方の弁体を動かして、図2(ア)に示すように、風呂戻り管17の浴槽5側と風呂バイパス管22側を連通し風呂熱交換器14の入口側を閉塞することで、風呂往き管16と風呂戻り管17との両方から浴槽5に注湯させることができる両搬送状態と、図2(イ)に示すように、風呂戻り管17の浴槽5側と風呂熱交換器14の入口側を連通し風呂バイパス管22側を閉塞することで、風呂往き管16と風呂戻り管17との両方から浴槽5に注湯させることができる両搬送状態と、図2(ウ)に示すように、風呂戻り管17の浴槽5側を閉塞し、風呂戻り管17のみから浴槽5に注湯させることができる片搬送状態とに少なくとも切換可能なものである。   The bath three-way valve 23 connects the bath 5 side of the bath return pipe 17 to the inflow side connection port 23a, and one of the two outflow side connection ports 23b and 23c has a bath heat exchanger. 14 is connected to the other connection port 23c, and a bath bypass pipe 22 is connected to the other connection port 23c. The inner valve body is moved by driving an electric motor (not shown), as shown in FIG. In addition, the bath 5 side and the bath bypass tube 22 side of the bath return pipe 17 are connected to each other, and the entrance side of the bath heat exchanger 14 is closed, so that the bath 5 is poured into the bath 5 from both the bath return pipe 16 and the bath return pipe 17. As shown in FIG. 2 (a), both the transport state in which hot water is allowed to flow and the bath 5 side of the bath return pipe 17 and the inlet side of the bath heat exchanger 14 are connected to close the bath bypass pipe 22 side. The bath 5 is poured from both the bath outlet pipe 16 and the bath return pipe 17. 2 at least, and as shown in FIG. 2 (c), at least the bath return pipe 17 is closed in the bathtub 5 side and the bath return pipe 17 alone can be poured into the bathtub 5 at least. It can be switched.

24は出湯管8から分岐した風呂出湯管、25は第1給水バイパス管9から分岐した第2給水バイパス管、26は風呂出湯管24からの高温の湯と第2給水バイパス管25からの水とを設定温度になるように内部の弁体(図示せず)の弁開度を調整して混合する風呂混合弁、27は風呂循環ポンプ18の配設位置よりも風呂熱交換器14側で、且つ風呂三方弁23の配設位置よりも浴槽5側の風呂戻り管17に接続され、貯湯タンク2内の湯水を浴槽5へ注湯する湯張り管、28は湯張り管27を開閉し浴槽5への注湯の開始、停止を行う開閉弁としての湯張り電磁弁、29は浴槽5への注湯量をカウントする風呂流量センサ、30は浴槽5の浴槽水が逆流するのを防止する二重に配設した逆止弁である。   Reference numeral 24 denotes a bath outlet pipe branched from the outlet pipe 8; 25, a second feed water bypass pipe branched from the first feed water bypass pipe 9; 26, hot water from the bath exit pipe 24 and water from the second feed water bypass pipe 25; Is a bath mixing valve 27 that adjusts the valve opening of an internal valve body (not shown) so as to be set at a set temperature, and 27 is closer to the bath heat exchanger 14 than the position where the bath circulation pump 18 is disposed. A hot water pipe connected to the bath return pipe 17 on the side of the bathtub 5 with respect to the position where the bath three-way valve 23 is disposed, and for pouring hot water in the hot water storage tank 2 into the bathtub 5, and 28 opens and closes the hot water pipe 27. A hot water solenoid valve as an on-off valve for starting and stopping pouring of the bath 5, 29 is a bath flow sensor that counts the amount of pouring water into the bath 5, and 30 prevents the bath water of the bath 5 from flowing backward. Double check valves.

31は貯湯タンク2内の湯水を加熱する加熱手段としての電熱ヒータである。ここでは、加熱手段の一例として電熱ヒータを適用したが、加熱手段はヒートポンプ式の加熱手段、灯油やガスを燃料とする燃焼バーナであってもよいものである。   31 is an electric heater as a heating means for heating the hot water in the hot water storage tank 2. Here, an electric heater is applied as an example of the heating means, but the heating means may be a heat pump type heating means or a combustion burner using kerosene or gas as fuel.

32は貯湯タンクユニット1内の給湯温度センサ12、給湯流量センサ13、流水スイッチ19、風呂温度センサ20、水位センサ21、風呂流量センサ29の入力を受け、給湯混合弁10、風呂循環ポンプ18、風呂三方弁23、風呂混合弁26、湯張り電磁弁28の駆動を制御する制御手段で、この制御手段32はリモコン4と無線または有線により通信可能に接続されているものである。   Reference numeral 32 denotes a hot water supply temperature sensor 12, a hot water supply flow sensor 13, a flowing water switch 19, a bath temperature sensor 20, a water level sensor 21, and a bath flow sensor 29 in the hot water storage tank unit 1. The control means 32 controls the drive of the bath three-way valve 23, the bath mixing valve 26, and the hot water solenoid valve 28. The control means 32 is connected to the remote controller 4 so as to be communicable wirelessly or by wire.

前記リモコン4は、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、浴槽5へ風呂設定温度の湯をリモコン4の湯張り量設定スイッチ(図示せず)で設定された湯張り設定量を注湯する湯張り運転を指示する湯張りスイッチ35とが設けられているものである。   The remote controller 4 includes a hot water supply temperature setting switch 33 for setting the hot water supply set temperature, a bath temperature setting switch 34 for setting the bath set temperature, and a hot water amount setting switch (see FIG. A hot water filling switch 35 for instructing a hot water filling operation for pouring a hot water filling set amount set in (not shown) is provided.

次に、図1に示した貯湯式給湯装置の湯張り運転時の動作を、図3に示したフローチャートを用いて説明する。   Next, the operation of the hot water storage type hot water supply apparatus shown in FIG. 1 during the hot water filling operation will be described with reference to the flowchart shown in FIG.

前記リモコン4の湯張りスイッチ35がユーザにより操作されると、まず、風呂循環ポンプ18の起動に必要な呼び水を供給する呼び水工程が開始され、制御手段32は、風呂三方弁23を図2(ア)に示すように、風呂戻り管17の浴槽5側と風呂バイパス管22側を連通し風呂熱交換器14の入口側を閉塞して、風呂往き管16と風呂戻り管17との両方から浴槽5に注湯させることができる両搬送状態とし(ステップS1)、続いて、制御手段32は、湯張り電磁弁28を開弁させて注湯を開始させ(ステップS2)、その直後に風呂三方弁23の弁体を電動モータによって回動して、図2(ア)に示すような両搬送状態から、図2(ウ)に示すような、風呂戻り管17の浴槽5側を閉塞し、風呂戻り管17のみから浴槽5に注湯させることができる片搬送状態に徐々に切り換えるものである(ステップS3)。なお、湯張り電磁弁28が開弁されると、風呂混合弁26で風呂設定温度に混合された湯が湯張り管27を介して風呂循環回路15に注湯されていくものである。   When the hot water filling switch 35 of the remote controller 4 is operated by the user, first, a priming process for supplying priming water necessary for starting the bath circulation pump 18 is started, and the control means 32 sets the bath three-way valve 23 in FIG. As shown in a), the bath return pipe 17 is connected to the bathtub 5 side and the bath bypass pipe 22 side, the entrance side of the bath heat exchanger 14 is closed, and the bath return pipe 16 and the bath return pipe 17 are both closed. Then, the control means 32 opens the hot water solenoid valve 28 to start pouring (step S2), and immediately after that, the bath 5 can be poured into the bathtub 5 (step S1). The valve body of the three-way valve 23 is rotated by an electric motor to close the bathtub 5 side of the bath return pipe 17 as shown in FIG. 2 (C) from both conveying states as shown in FIG. 2 (A). Pour hot water into the tub 5 only from the bath return pipe 17 It is intended to switch gradually at one conveying ready (step S3). When the hot water solenoid valve 28 is opened, hot water mixed at the bath setting temperature by the bath mixing valve 26 is poured into the bath circulation circuit 15 via the hot water pipe 27.

そして、制御手段32は、風呂流量センサ29で検出した湯量の積算値から、注湯開始して所定量、例えば3L注湯したか否か判断し(ステップS4)、所定量注湯したと判断すると、風呂循環ポンプ18への呼び水および風呂戻り管17のエア抜きが完了したと判断し、風呂三方弁23を片搬送状態から図2(ア)に示すような両搬送状態に戻し(ステップS5)、その後に湯張り電磁弁28を閉弁させ(ステップS6)、呼び水工程を終了するものである。   Then, the control means 32 determines whether or not a predetermined amount, for example, 3 L, has been poured from the integrated value of the hot water amount detected by the bath flow sensor 29 (step S4), and determines that a predetermined amount has been poured. Then, it is determined that the priming water to the bath circulation pump 18 and the air return from the bath return pipe 17 have been completed, and the bath three-way valve 23 is returned from the one transport state to the both transport state as shown in FIG. 2A (step S5). Then, the hot water solenoid valve 28 is closed (step S6), and the priming process is completed.

前記呼び水工程が終了すると、制御手段32は、風呂循環ポンプ18を一定時間駆動して、その間に流水スイッチ19で流水の有無をチェックする(ステップS7)。流水がない場合は浴槽5内に湯がない状態なので、風呂三方弁23を両搬送状態としたまま湯張り電磁弁28を開弁し(ステップS8)、湯張り設定量、例えば180Lの注湯を開始する。   When the priming step is completed, the control means 32 drives the bath circulation pump 18 for a certain period of time, and checks the presence or absence of running water with the running water switch 19 (step S7). Since there is no hot water in the bathtub 5 when there is no running water, the hot water solenoid valve 28 is opened while the bath three-way valve 23 is in both transport states (step S8), and a hot water set amount, for example, 180 L of hot water is poured. To start.

湯張り電磁弁28が開弁されると、風呂往き管16と風呂戻り管17との両方から浴槽5に注湯し、制御手段32は、風呂流量センサ29で検出した湯量の積算値から、湯張り設定量より所定量少ない予め設定された第1規定量、例えば170Lまで注湯したか否か判断し(ステップS9)、第1規定量まで注湯したと判断すると、風呂三方弁23の弁体を電動モータによって回動して、両搬送状態から図2(ウ)に示すような片搬送状態とし(ステップS10)、浴槽5への注湯を風呂戻り管17のみに切り換えるものである。   When the hot water solenoid valve 28 is opened, hot water is poured into the bathtub 5 from both the bath outlet pipe 16 and the bath return pipe 17, and the control means 32 determines from the integrated value of the hot water amount detected by the bath flow rate sensor 29. It is determined whether or not the pre-set first specified amount, for example, 170 L, which is smaller than the hot water set amount is poured (step S9), and if it is determined that the first prescribed amount is poured, the bath three-way valve 23 The valve body is rotated by an electric motor to change from both transport states to a single transport state as shown in FIG. 2C (step S10), and the pouring to the bathtub 5 is switched to the bath return pipe 17 only. .

続いて、制御手段32は、風呂流量センサ29で検出した湯量の積算値から、湯張り設定量より所定量少なく前記第1規定量より所定量多い予め設定された第2規定量、例えば178Lまで注湯したか否か判断し(ステップS11)、第2規定量まで注湯したと判断すると、風呂三方弁23の弁体を電動モータによって回動して、片搬送状態から図2(ア)に示すような両搬送状態とし(ステップS12)、風呂往き管16と風呂戻り管17との両方から浴槽5へ注湯を行い、風呂流量センサ29で検出した湯量の積算値から、湯張り設定量まで注湯したか否か判断し(ステップS13)、湯張り設定量まで注湯したと判断したら、湯張り電磁弁28を閉弁させ(ステップS14)、湯張り運転を終了するものである。   Subsequently, the control means 32 starts from the accumulated amount of hot water detected by the bath flow sensor 29 to a preset second specified amount, for example, 178 L, which is a predetermined amount less than the hot water set amount and a predetermined amount greater than the first specified amount. It is determined whether or not the hot water has been poured (step S11), and if it is determined that the hot water has been poured up to the second specified amount, the valve body of the bath three-way valve 23 is rotated by the electric motor, and the state of FIG. (Step S12), pouring hot water into the bathtub 5 from both the bath outlet pipe 16 and the bath return pipe 17, and setting the hot water filling from the integrated value of the amount of hot water detected by the bath flow sensor 29. It is determined whether or not the amount has been poured (step S13). If it is determined that the amount of hot water has been poured, the hot water solenoid valve 28 is closed (step S14), and the hot water operation is terminated. .

以上説明した湯張り運転時において、前記ステップS6または前記ステップS14で、湯張り電磁弁28を閉弁して浴槽5への注湯を停止する際、その前段として前記ステップS5またはステップS12で、風呂三方弁23を両搬送状態とし、風呂三方弁23を両搬送状態としてから湯張り電磁弁28を閉弁するようにしたことで、減圧弁7の設定圧力が高圧設定のものであっても、湯張り電磁弁28を閉弁した瞬間に生じる水撃による圧力の急下降および圧力の急上昇といった圧力変動を風呂往き管16および風呂戻り管17の両方に分散させ低減させることができ、風呂循環ポンプ18や水位センサ21等の機能部品の破損、風呂循環回路15を構成する配管の外れや損傷による水漏れを防止することができるものである。   During the hot water filling operation described above, in step S6 or step S14, when the hot water solenoid valve 28 is closed to stop pouring water into the bathtub 5, as the preceding stage, in step S5 or step S12, Even if the set pressure of the pressure reducing valve 7 is set to a high pressure, the bath three-way valve 23 is set to the double transfer state, and the hot water solenoid valve 28 is closed after the bath three-way valve 23 is set to the double transfer state. In addition, pressure fluctuations such as a sudden drop in pressure and a sudden rise in pressure due to water hammer occurring at the moment when the hot water solenoid valve 28 is closed can be dispersed and reduced in both the bath outlet pipe 16 and the bath return pipe 17, and the bath circulation. It is possible to prevent water leakage due to breakage of functional parts such as the pump 18 and the water level sensor 21 and disconnection or damage of piping constituting the bath circulation circuit 15.

また、前記ステップS2または前記ステップS8で、湯張り電磁弁28を開弁して浴槽5への注湯を開始する際、その前段として前記ステップS1または前記ステップS5で、風呂三方弁23を両搬送状態とし、風呂三方弁23を両搬送状態としてから湯張り電磁弁28を開弁するようにしたことで、減圧弁7の設定圧力が高圧設定のものであっても、湯張り電磁弁28を開弁した瞬間に生じる水撃による圧力上昇を風呂往き管16および風呂戻り管17の両方に分散させ低減させることができ、風呂循環ポンプ18や水位センサ21等の機能部品の破損、風呂循環回路15を構成する配管の外れや損傷による水漏れを防止することができるものである。   When the hot water solenoid valve 28 is opened in step S2 or step S8 to start pouring hot water into the bathtub 5, the bath three-way valve 23 is turned on in step S1 or step S5. Even if the set pressure of the pressure reducing valve 7 is set to a high pressure, the hot water solenoid valve 28 is set in the transport state and the hot water solenoid valve 28 is opened after the bath three-way valve 23 is in both transport states. The pressure increase due to water hammer generated at the moment when the valve is opened can be distributed and reduced in both the bath outlet pipe 16 and the bath return pipe 17, damage to functional parts such as the bath circulation pump 18 and the water level sensor 21, and bath circulation. Water leakage due to disconnection or damage of the pipes constituting the circuit 15 can be prevented.

また、制御手段32は、前記ステップS2で湯張り電磁弁28を開弁した直後に、前記ステップS3で風呂三方弁23の弁体を電動モータによって回動させ、図2(ア)に示すような両搬送状態から、図2(ウ)に示すような片搬送状態に徐々に切り換えることで、風呂循環ポンプ18を備えた風呂戻り管17に急に圧力が加わるのを防止することができ、さらに、片搬送状態で所定量注湯することで、風呂戻り管17を流れる湯水の圧力を高くすると共に流量を多くして、風呂循環ポンプ18に確実に呼び水を行うことができるものである。   Further, immediately after the hot water solenoid valve 28 is opened in the step S2, the control means 32 rotates the valve body of the bath three-way valve 23 by the electric motor in the step S3, as shown in FIG. By gradually switching from both transport states to the single transport state as shown in FIG. 2 (c), it is possible to prevent sudden pressure from being applied to the bath return pipe 17 equipped with the bath circulation pump 18, Furthermore, by pouring a predetermined amount of water in the single conveyance state, the pressure of the hot water flowing through the bath return pipe 17 can be increased and the flow rate can be increased, so that the bath circulation pump 18 can be priming reliably.

また、浴槽5へ設定量の注湯を行う場合、浴槽5への注湯を開始し設定量より所定量少ない予め設定された第1規定量までは、風呂三方弁23を両搬送状態として、設定量のうち大部分を風呂往き管16および風呂戻り管17の両方から浴槽5に注湯することで、減圧弁7の設定圧力が高圧設定のものであっても、注湯開始時の湯張り電磁弁28を開弁した瞬間に生じる水撃による圧力上昇を風呂往き管16および風呂戻り管17の両方に分散させ低減させることができ、風呂循環ポンプ18や水位センサ21等の機能部品の破損、風呂循環回路15を構成する配管の外れや損傷による水漏れを防止することができると共に、注湯時間の短縮ができ、前記第1規定量に到達したら、風呂三方弁23を両搬送状態から片搬送状態に切り換え、設定量より所定量少なく第1規定量より所定量多い予め設定された第2規定量に到達するまでは、風呂三方弁23を片搬送状態として、風呂戻り管17のみから浴槽5に注湯することで、風呂循環ポンプ18や水位センサ21近傍に残存するエアを押し出して風呂戻り管17のエア抜きが確実に行われ、エア混入による水位センサ21による水位誤検出を防止することができ、前記第2規定量に到達したら、風呂三方弁23を片搬送状態から両搬送状態に切り換え、設定量に到達したら、風呂三方弁23を両搬送状態としたままで湯張り電磁弁28を閉弁することで、減圧弁7の設定圧力が高圧設定のものであっても、湯張り電磁弁28を開弁した瞬間に生じる水撃による圧力上昇を風呂往き管16および風呂戻り管17の両方に分散させ低減させることができ、風呂循環ポンプ18や水位センサ21等の機能部品の破損、風呂循環回路15を構成する配管の外れや損傷による水漏れを防止することができるものである。   In addition, when pouring a set amount of water into the bathtub 5, the bath three-way valve 23 is set in both conveying states until the first specified amount that is preset by a predetermined amount less than the set amount is started. By pouring most of the set amount from both the bath outlet pipe 16 and the bath return pipe 17 to the bathtub 5, even when the pressure setting of the pressure reducing valve 7 is a high pressure setting, The pressure increase due to water hammer generated at the moment when the tension solenoid valve 28 is opened can be dispersed and reduced in both the bath outlet pipe 16 and the bath return pipe 17, and functional components such as the bath circulation pump 18 and the water level sensor 21 can be reduced. It is possible to prevent water leakage due to breakage, disconnection of pipes constituting the bath circulation circuit 15 and damage, and also to shorten the pouring time. When the first specified amount is reached, the bath three-way valve 23 is in the state of both transports. Switch from single to The bath three-way valve 23 is placed in a single transport state and poured into the bathtub 5 only from the bath return pipe 17 until reaching a preset second prescribed amount that is a prescribed amount less than the first prescribed amount and a prescribed amount greater than the first prescribed amount. Thus, the air remaining in the vicinity of the bath circulation pump 18 and the water level sensor 21 is pushed out and the air from the bath return pipe 17 is surely removed, so that erroneous detection of the water level by the water level sensor 21 due to air contamination can be prevented. 2 When the specified amount is reached, the bath three-way valve 23 is switched from the single transfer state to the double transfer state, and when the set amount is reached, the hot water solenoid valve 28 is closed while the bath three-way valve 23 remains in the double transfer state. Thus, even if the set pressure of the pressure reducing valve 7 is a high pressure setting, the pressure increase due to water hammer generated at the moment when the hot water solenoid valve 28 is opened is distributed to both the bath outlet pipe 16 and the bath return pipe 17. Reduction So it can be one in which it is possible to prevent damage of functional parts such as a bath circulation pump 18 and the water level sensor 21, the water leakage due to off or damage of the piping constituting the bath circulation circuit 15.

なお、本発明は先に説明した一実施形態に限定されるものではなく、本実施形態では、湯張り運転時において、風呂三方弁23を図2(ア)に示すような両搬送状態としたが、風呂三方弁23を、図2(イ)に示すような両搬送状態としてもよいものであり、本発明の要旨を変更しない範囲で様々な変形が可能であり、これを妨げるものではない。   The present invention is not limited to the above-described embodiment. In the present embodiment, the bath three-way valve 23 is in the both-transport state as shown in FIG. However, the bath three-way valve 23 may be in the both-transport state as shown in FIG. 2 (a), and various modifications are possible without departing from the scope of the present invention, and this is not disturbed. .

また、本実施形態では、湯張り運転時を例として説明したが、湯張り運転時に限らず、たし湯や高温差し湯のような浴槽5へ設定量の注湯動作を行うものに本発明を適用してもよく、その場合であっても、湯張り電磁弁28を閉弁して浴槽5への注湯を停止する際または湯張り電磁弁28を開弁して浴槽5への注湯を開始する際は、風呂三方弁23を両搬送状態としてから湯張り電磁弁28を閉弁または開弁することで、減圧弁7の設定圧力が高圧設定のものであっても、湯張り電磁弁28を開弁した瞬間に生じる水撃による圧力上昇を風呂往き管16および風呂戻り管17の両方に分散させ低減させることができ、風呂循環ポンプ18や水位センサ21等の機能部品の破損、風呂循環回路15を構成する配管の外れや損傷による水漏れを防止することができ、さらに、設定量より所定量少ない予め設定された第1規定量までは、風呂三方弁23を両搬送状態として、設定量のうち大部分を風呂往き管16および風呂戻り管17の両方から浴槽5に注湯することで、注湯時間の短縮ができ、前記第1規定量に到達したら、風呂三方弁23を両搬送状態から片搬送状態に切り換え、風呂戻り管17のみから浴槽5に注湯することで、風呂循環ポンプ18や水位センサ21近傍に残存するエアを押し出して風呂戻り管17のエア抜きが確実に行われ、エア混入による水位センサ21による水位誤検出を防止することができるものである。   Further, in the present embodiment, the hot water filling operation has been described as an example. However, the present invention is not limited to the hot water filling operation, and the present invention is not limited to the hot water filling operation but performs a pouring operation of a set amount to the bathtub 5 such as tossed water or high temperature hot water. Even in such a case, when the hot water solenoid valve 28 is closed to stop pouring water into the bathtub 5, or when the hot water solenoid valve 28 is opened, pouring into the bathtub 5 is possible. Even when the hot water is started, the hot water filling solenoid valve 28 is closed or opened after the bath three-way valve 23 is in both transport states, so that the hot water filling is performed even if the pressure setting of the pressure reducing valve 7 is set to a high pressure. Pressure rise due to water hammer generated at the moment when the solenoid valve 28 is opened can be dispersed and reduced in both the bath outlet pipe 16 and the bath return pipe 17, and functional parts such as the bath circulation pump 18 and the water level sensor 21 are damaged. , Prevents water leakage due to disconnection or damage of the piping constituting the bath circulation circuit 15 Further, up to a first predetermined amount that is a predetermined amount smaller than the set amount, the bath three-way valve 23 is in both transport states, and most of the set amounts are the bath outlet pipe 16 and the bath return pipe 17. By pouring into the bathtub 5 from both sides, the pouring time can be shortened. When the first specified amount is reached, the bath three-way valve 23 is switched from the both-transport state to the one-transport state, and only from the bath return pipe 17 By pouring water into the bathtub 5, the air remaining in the vicinity of the bath circulation pump 18 and the water level sensor 21 is pushed out and the bath return pipe 17 is surely vented to prevent erroneous detection of the water level by the water level sensor 21 due to air contamination. Is something that can be done.

2 貯湯タンク
5 浴槽
14 風呂熱交換器
15 風呂循環回路
16 風呂往き管
17 風呂戻り管
18 風呂循環ポンプ
23 風呂三方弁
27 湯張り管
28 湯張り電磁弁
2 Hot Water Storage Tank 5 Bath 14 Bath Heat Exchanger 15 Bath Circulation Circuit 16 Bath Outward Pipe 17 Bath Return Pipe 18 Bath Circulation Pump 23 Bath Three-way Valve 27 Hot Water Tub 28 Hot Water Solenoid Valve

Claims (3)

湯水を貯湯する貯湯タンクと、浴槽の浴槽水を前記貯湯タンク内の湯水と熱交換して加熱する風呂熱交換器と、前記浴槽と前記風呂熱交換器とを接続する風呂往き管および風呂戻り管から成る風呂循環回路と、前記風呂循環回路に設けられ浴槽水を循環させる風呂循環ポンプと、前記風呂循環回路に接続され前記貯湯タンク内の湯水を前記浴槽へ注湯する湯張り管と、該湯張り管を開閉する開閉弁と、前記風呂循環回路に設けられ前記風呂循環ポンプが設けられた側の前記風呂循環回路のみから前記浴槽に注湯させることができる片搬送状態と、前記風呂往き管と前記風呂戻り管との両方から前記浴槽に注湯させることができる両搬送状態とに切換可能な流路切換手段とを備え、前記湯張り管から前記風呂循環回路を介して前記浴槽へ注湯を行う貯湯式給湯装置において、少なくとも前記開閉弁を閉弁し前記浴槽への注湯を停止する際は、前記流路切換手段を前記両搬送状態とし、前記開閉弁を開弁し前記浴槽への注湯を開始する際は、前記流路切換手段を前記両搬送状態とし、前記浴槽へ設定量の注湯を行う場合、注湯を開始し前記設定量より所定量少ない予め設定された第1規定量に到達するまでは、前記流路切換手段を両搬送状態とし、前記第1規定量に到達したら、前記流路切換手段を前記両搬送状態から前記片搬送状態に切り換え、前記設定量より所定量少なく前記第1規定量より所定量多い予め設定された第2規定量に到達するまでは、前記流路切換手段を片搬送状態とし、前記第2規定量に到達したら、前記流路切換手段を前記片搬送状態から前記両搬送状態に切り換え、前記設定量に到達したら、前記開閉弁を閉弁するようにしたことを特徴とする貯湯式給湯装置。 A hot water storage tank that stores hot water, a bath heat exchanger that heats the bathtub water in the bathtub by exchanging heat with the hot water in the hot water storage tank, a bath pipe that connects the bathtub and the bath heat exchanger, and a bath return A bath circulation circuit comprising pipes, a bath circulation pump provided in the bath circulation circuit for circulating bath water, a hot water pipe connected to the bath circulation circuit and for pouring hot water in the hot water storage tank into the bathtub, An on-off valve that opens and closes the hot-water pipe, a single-conveyed state in which hot water can be poured into the bathtub only from the bath circulation circuit provided in the bath circulation circuit and provided with the bath circulation pump, and the bath A flow path switching means that can switch between both a forward pipe and a bath return pipe to be able to pour hot water into the bathtub, and the bathtub through the bath circulation circuit. Pour hot water In the Hare hot water storage type water heater, when stopping the pouring of the closed at least the on-off valve the tub, the flow path switching unit and the both transport state, opens the on-off valve to the tub When starting pouring, when the flow path switching means is set to the both conveying state and pouring a predetermined amount into the bathtub, the pouring is started and a preset first amount smaller than the set amount is set. Until the predetermined amount is reached, the flow path switching means is set to the two transport state, and when the first predetermined amount is reached, the flow path switching means is switched from the both transport state to the one transport state, and from the set amount The flow path switching means is placed in a single conveying state until a predetermined second predetermined amount that is smaller by a predetermined amount and larger than the first predetermined amount is reached, and when the second predetermined amount is reached, the flow path switching is performed. Switch the means from the one transport state to both For example, upon reaching the set amount, storage-type hot water supply apparatus is characterized in that so as to close the opening and closing valve. 湯水を貯湯する貯湯タンクと、浴槽の浴槽水を前記貯湯タンク内の湯水と熱交換して加熱する風呂熱交換器と、前記浴槽と前記風呂熱交換器とを接続する風呂往き管および風呂戻り管から成る風呂循環回路と、前記風呂循環回路に設けられ浴槽水を循環させる風呂循環ポンプと、前記風呂循環回路に接続され前記貯湯タンク内の湯水を前記浴槽へ注湯する湯張り管と、該湯張り管を開閉する開閉弁と、前記風呂循環回路に設けられ前記風呂循環ポンプが設けられた側の前記風呂循環回路のみから前記浴槽に注湯させることができる片搬送状態と、前記風呂往き管と前記風呂戻り管との両方から前記浴槽に注湯させることができる両搬送状態とに切換可能な流路切換手段とを備え、前記湯張り管から前記風呂循環回路を介して前記浴槽へ注湯を行う貯湯式給湯装置であって、前記流路切換手段を片搬送状態として前記浴槽へ注湯を行う工程を有するものにおいて、前記浴槽への注湯を停止する際は、前記流路切換手段を前記両搬送状態としてから前記開閉弁を閉弁するようにしたことを特徴とする貯湯式給湯装置。 A hot water storage tank that stores hot water, a bath heat exchanger that heats the bathtub water in the bathtub by exchanging heat with the hot water in the hot water storage tank, a bath pipe that connects the bathtub and the bath heat exchanger, and a bath return A bath circulation circuit comprising pipes, a bath circulation pump provided in the bath circulation circuit for circulating bath water, a hot water pipe connected to the bath circulation circuit and for pouring hot water in the hot water storage tank into the bathtub, An on-off valve that opens and closes the hot-water pipe, a single-conveyed state in which hot water can be poured into the bathtub only from the bath circulation circuit provided in the bath circulation circuit and provided with the bath circulation pump, and the bath A flow path switching means that can switch between both a forward pipe and a bath return pipe to be able to pour hot water into the bathtub, and the bathtub through the bath circulation circuit. Pour hot water In the hot water storage type hot water supply apparatus, which has a step of pouring hot water into the bathtub with the flow path switching means in a single conveying state, when stopping pouring into the bathtub, the flow path switching means is The hot water storage type hot water supply apparatus, wherein the open / close valve is closed after the both conveying states are set . 前記浴槽への注湯を開始する際は、前記流路切換手段を前記両搬送状態としてから前記開閉弁を開弁するようにしたことを特徴とする請求項2記載の貯湯式給湯装置。 3. The hot water storage type hot water supply apparatus according to claim 2 , wherein when the pouring to the bathtub is started, the on-off valve is opened after the flow path switching means is in the both conveying state .
JP2011221506A 2011-10-06 2011-10-06 Hot water storage water heater Active JP5763496B2 (en)

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