JP5012408B2

JP5012408B2 - Hot water storage water heater

Info

Publication number: JP5012408B2
Application number: JP2007274989A
Authority: JP
Inventors: 悟新田; 孝信藤本
Original assignee: Panasonic Corp; Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Corp; Panasonic Holdings Corp
Priority date: 2007-10-23
Filing date: 2007-10-23
Publication date: 2012-08-29
Anticipated expiration: 2027-10-23
Also published as: JP2009103355A

Description

本発明は、貯湯式給湯機に関するものである。 The present invention relates to a hot water storage type water heater.

従来、ヒータ等の熱源を用いて貯湯タンク内の水を沸き上げ、高温に沸き上げたお湯を貯湯タンク上部より水と混合して浴槽にお湯を張り、浴槽水の保温は貯湯タンクとは別に設けた熱交換器にお湯を供給し、浴槽水と熱交換して風呂追い焚きを行う構成としている。 Conventionally, water in a hot water storage tank is boiled using a heat source such as a heater, hot water heated to a high temperature is mixed with water from the top of the hot water storage tank, and hot water is added to the bathtub. Hot water is supplied to the installed heat exchanger, and heat is exchanged with bathtub water to replenish the bath.

図２は、従来の貯湯式給湯機の風呂湯張り、風呂追い焚きの構成を示すものである。図２に示すように、湯を貯える貯湯タンク１と、水を貯湯タンク１に供給する給水口２と、浴槽へ湯を供給し貯湯タンク１の上部に設けられた浴槽往き口３とを設けており、浴槽へ湯を供給できる構成となっている。浴槽往き口３から浴槽までの間には、浴槽へ供給する湯の温度を設定温度にする風呂給湯混合弁７と、浴槽１６への湯の供給の開閉を行う注湯弁６が設けられており、注湯弁６の開閉によって浴槽１６へ湯が供給される。 FIG. 2 shows a configuration of a conventional hot water storage type hot water heater and bathing. As shown in FIG. 2, a hot water storage tank 1 that stores hot water, a water supply port 2 that supplies water to the hot water storage tank 1, and a bathtub outlet 3 that supplies hot water to the bathtub and is provided above the hot water storage tank 1 are provided. The hot water can be supplied to the bathtub. Between the bathtub entrance 3 and the bathtub, there are provided a hot water supply mixing valve 7 for setting the temperature of hot water supplied to the bathtub to a set temperature, and a pouring valve 6 for opening and closing the supply of hot water to the bathtub 16. The hot water is supplied to the bathtub 16 by opening and closing the pouring valve 6.

また、浴槽１６へ湯を供給するのとは別に、浴槽１６内の湯水を追い焚きするための熱交換器９が設けられており、熱交換器９は貯湯タンク１内の高温水が流れる１次側回路と、浴槽１６内の湯水が流れる２次側回路で構成されている。また、熱交換器９における１次側回路には、貯湯タンク１内の高温水が流入する熱交１次入り口１０と、熱交換器９から貯湯タンク１へ出て行く熱交１次出口１１を有し、一方、浴槽水が流れる２次側回路には、浴槽水の湯水を熱交換器９に流入させる熱交２次入口１２と、熱交換器９から浴槽１６へ出て行く熱交２次出口１３を有している。また、浴槽１６から２次側回路へ湯を供給する配管を風呂往き配管１０１とし、２次側回路から浴槽１６へ湯が戻ってくる配管を風呂戻り配管１０２としている。 In addition to supplying hot water to the bathtub 16, a heat exchanger 9 for replenishing hot water in the bathtub 16 is provided, and the heat exchanger 9 flows hot water in the hot water storage tank 1 1. It consists of a secondary circuit and a secondary circuit through which hot water in the bathtub 16 flows. Further, the primary circuit in the heat exchanger 9 includes a heat exchange primary inlet 10 through which high-temperature water in the hot water storage tank 1 flows, and a heat exchange primary outlet 11 that exits from the heat exchanger 9 to the hot water storage tank 1. On the other hand, in the secondary side circuit through which the bathtub water flows, the heat exchange secondary inlet 12 through which the hot water of the bathtub water flows into the heat exchanger 9 and the heat exchange that goes out from the heat exchanger 9 to the bathtub 16 are provided. A secondary outlet 13 is provided. Also, a pipe for supplying hot water from the bathtub 16 to the secondary circuit is a bath outlet pipe 101, and a pipe for returning hot water from the secondary circuit to the bathtub 16 is a bath return pipe 102.

そして、１次側回路には、前記浴槽往き口３とは別口として貯湯タンク１の上方部に設けられた熱交換器往き口４から高温水が供給されるとともに、熱交換器９で放熱した後の温水を戻すために、貯湯タンク１の下方部に熱交換器戻り口５を設けており、熱交換器往き口４と熱交換器戻り口５の間で貯湯タンク１内の高温水を循環させるタンク循環回路を形成している。タンク循環回路には、タンク内の湯水を循環させるタンク循環ポンプ１４が設けられている。 The primary circuit is supplied with high-temperature water from a heat exchanger outlet 4 provided in the upper part of the hot water storage tank 1 as a separate port from the bathtub outlet 3 and radiates heat by the heat exchanger 9. In order to return the hot water after being heated, a heat exchanger return port 5 is provided in the lower part of the hot water storage tank 1, and the hot water in the hot water storage tank 1 is interposed between the heat exchanger outlet 4 and the heat exchanger return port 5. The tank circulation circuit which circulates is formed. The tank circulation circuit is provided with a tank circulation pump 14 for circulating hot water in the tank.

一方、２次側回路では、浴槽１６から風呂往き配管１０１を通って、低温水が熱交換器９へ供給されるとともに、熱交換器９で貯湯タンク１の高温水から熱をもらい、再度風呂戻り配管１０２を通って浴槽１６へ戻る。また２次側回路には、浴槽１６内の湯水を循環させる風呂循環ポンプ１５が設けられている。また、風呂給湯混合弁７から浴槽１６へ湯を供給する経路は、２次側回路へ接続されており、浴槽への湯張り時の湯張り経路は、２次側回路の風呂往き配管１０１と、風呂戻り配管１０２の両配管から、浴槽へ湯が供給されている。 On the other hand, in the secondary circuit, the low temperature water is supplied from the bathtub 16 to the heat exchanger 9 through the bath outlet pipe 101, and the heat exchanger 9 receives heat from the high temperature water in the hot water storage tank 1 and again takes a bath. It returns to the bathtub 16 through the return pipe 102. The secondary circuit is provided with a bath circulation pump 15 for circulating hot water in the bathtub 16. Further, the path for supplying hot water from the bath hot water mixing valve 7 to the bathtub 16 is connected to the secondary circuit, and the hot water filling path when filling the bathtub is connected to the bath outlet pipe 101 of the secondary circuit. Hot water is supplied from both pipes of the bath return pipe 102 to the bathtub.

従来は上記構成において、風呂湯はり時には注湯弁６が開き、設定温度となるように風呂給湯混合弁７の下流側に設けた風呂給湯検出部８で湯の温度を検出しながら風呂給湯混合弁７で貯湯タンク内のお湯と水道水とを混合し、２次側回路の風呂往き配管１０１と風呂戻り配管１０２の両配管を通って、風呂へ湯を供給していた。 Conventionally, in the above-described configuration, the hot water supply valve 6 is opened when the hot water is applied, and the hot water mixing is carried out while detecting the temperature of the hot water with the hot water supply detecting section 8 provided on the downstream side of the hot water supply mixing valve 7 so as to reach the set temperature. The hot water in the hot water storage tank and tap water were mixed by the valve 7 and hot water was supplied to the bath through both the bath-out piping 101 and the bath return piping 102 of the secondary circuit.

そして風呂追い焚き時には、貯湯タンク１上部の高温水を熱交換器往き口４からタンク
循環ポンプ１４で熱交換器９の熱交１次入り口１０に供給し、熱交換され低温になった温水を熱交１次出口１３から貯湯タンク１の熱交換器戻り口５に戻し、熱交換器９の１次側で貯湯タンク１内の高温水の循環回路を形成している。一方、風呂循環ポンプ１５を駆動することで風呂往き配管１０１から浴槽１６の温水を、追い焚き熱交換器９の熱交２次入り口１２に供給し、前記１次側の高温水と熱交換して温度上昇させて熱交２次出口１３から風呂戻り配管１０２より浴槽１６に戻して追い焚きを行っていた。 At the time of bathing, the hot water in the upper part of the hot water storage tank 1 is supplied from the heat exchanger outlet 4 to the heat exchange primary inlet 10 of the heat exchanger 9 by the tank circulation pump 14, and the hot water that has undergone heat exchange and has become low temperature is supplied. The heat exchange primary outlet 13 returns to the heat exchanger return port 5 of the hot water storage tank 1, and a high-temperature water circulation circuit in the hot water storage tank 1 is formed on the primary side of the heat exchanger 9. On the other hand, by driving the bath circulation pump 15, the hot water of the bathtub 16 is supplied from the bath outlet pipe 101 to the heat exchange secondary inlet 12 of the reheating heat exchanger 9 to exchange heat with the high-temperature water on the primary side. Then, the temperature was raised and returned to the bathtub 16 from the heat return secondary outlet 13 through the bath return pipe 102 to retreat.

つまり、従来の構成では、湯張り時には貯湯タンク１から出湯する湯は、風呂往き配管１０１と、風呂戻り配管１０２を通って浴槽へ供給されるため、熱交換器９の２次側回路を経て浴槽へ湯が供給されることになるが、タンク循環ポンプ１４は駆動していないため、熱交換器９で熱交換は行われず、貯湯タンク内の湯水が浴槽へ供給される。一方、浴槽１６内の湯水を２次側回路を循環して追い焚きするときには、浴槽１６内の湯水を２次側回路で循環させるとともに、タンク循環ポンプ１４を駆動して貯湯タンク内の湯水を１次側回路で循環させるので、熱交換器９では浴槽１６の湯水と貯湯タンク１の湯水とが熱交換をして追い焚きしている（例えば、特許文献１参照）。
特開２００７−１９２４６１号公報 In other words, in the conventional configuration, the hot water discharged from the hot water storage tank 1 when hot water is filled is supplied to the bathtub through the bath return pipe 101 and the bath return pipe 102, and thus passes through the secondary circuit of the heat exchanger 9. Although hot water is supplied to the bathtub, since the tank circulation pump 14 is not driven, heat exchange is not performed in the heat exchanger 9, and hot water in the hot water storage tank is supplied to the bathtub. On the other hand, when the hot water in the bathtub 16 is circulated through the secondary circuit, the hot water in the bathtub 16 is circulated in the secondary circuit, and the tank circulation pump 14 is driven to supply hot water in the hot water storage tank. Since it is circulated in the primary side circuit, in the heat exchanger 9, the hot water in the bathtub 16 and the hot water in the hot water storage tank 1 are exchanging heat (for example, refer to Patent Document 1).
JP 2007-192461 A

しかしながら、前記従来構成において、風呂お湯はり時には、風呂給湯混合弁７で適温に混合された湯が、熱交換器内に湯水が通って浴槽へ供給されているので、電気回路等の不具合や故障等でタンク循環ポンプ１４が駆動してしまうと、熱交換器を通過するときに、貯湯タンク１内の湯水から熱を受け取ってしまい、設定温度以上の湯が浴槽内に貯まってしまうという課題を有していた。 However, in the conventional configuration, when bathing hot water, hot water mixed at an appropriate temperature by the bath hot water mixing valve 7 is supplied to the bathtub through hot water in the heat exchanger. If the tank circulation pump 14 is driven by the above, when passing through the heat exchanger, heat is received from the hot water in the hot water storage tank 1, and hot water at a set temperature or higher is stored in the bathtub. Had.

本発明は、前記従来の課題を解決するもので、タンク循環ポンプが何かの不具合で連続運転した場合であっても、安全な貯湯式給湯機を提供することを目的とする。 SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object thereof is to provide a safe hot water storage type water heater even when a tank circulation pump is continuously operated due to some trouble.

前記従来の課題を解決するために本発明の貯湯式給湯機は、湯を貯湯する貯湯タンクと、浴槽への給湯を開閉する注湯弁と、前記貯湯タンク内の高温湯と水とを混合して風呂給湯温度を調整する風呂給湯混合弁と、前記風呂給湯混合弁の下流に設けられ風呂給湯温度を検出する風呂給湯検出部と、前記貯湯タンクの湯と浴槽水とで熱交換するタンク外側に配置した熱交換器と、前記貯湯タンク上部と下部を連結する熱交換器の一次側循環経路と、前記一次側循環経路に介設したタンク循環ポンプと、熱交換器一次側出口の温度を検出する熱交一次出口温度検出部と、浴槽水を循環する熱交換器の二次側循環経路と、前記二次側循環経路に介設した風呂循環ポンプと、熱交換器の二次側出口の温度を検出する追い焚き温度検出部と、熱交換器の二次側入り口の温度を検出する風呂温度検出部とを備え、風呂給湯中に追い焚き温度検出部で検出される温度が、風呂給湯検出部で検出される温度より所定温度以上高い状態が、所定時間継続した時に、風呂給湯を停止するものである。 In order to solve the above-described conventional problems, the hot water storage type water heater of the present invention is a mixture of a hot water storage tank for storing hot water, a pouring valve for opening and closing hot water supply to the bathtub, and hot water and water in the hot water storage tank. A bath / hot water mixing valve for adjusting the bath / hot water temperature, a bath / hot water detection unit for detecting the bath / hot water temperature provided downstream of the bath / hot water mixing valve, and a tank for exchanging heat between the hot water of the hot water storage tank and the bathtub water The heat exchanger disposed outside, the primary circulation path of the heat exchanger connecting the upper and lower parts of the hot water storage tank, the tank circulation pump interposed in the primary circulation path, and the temperature of the primary outlet of the heat exchanger A heat exchange primary outlet temperature detection unit for detecting the water, a secondary side circulation path of the heat exchanger for circulating the bath water, a bath circulation pump interposed in the secondary side circulation path, and a secondary side of the heat exchanger A reheating temperature detection unit that detects the temperature of the outlet, and a heat exchanger A bath temperature detector that detects the temperature of the next entrance, and the temperature detected by the reheating temperature detector during bath water supply is higher than the temperature detected by the bath hot water detector by a predetermined temperature or more. When the time continues, bath water supply is stopped.

これによって、浴槽への湯張り時であっても、タンク循環ポンプが何らかの不具合で連続運転している時に、風呂給湯を停止することができるので安全性が向上する。 Accordingly, even when the hot water is filled in the bathtub, the bath hot water supply can be stopped when the tank circulation pump is continuously operated for some reason, so that safety is improved.

タンク循環ポンプが何かの不具合で連続運転した場合であっても、安全な貯湯式給湯機を提供することができる。 Even when the tank circulation pump is continuously operated due to some trouble, a safe hot water storage type hot water heater can be provided.

第１の発明の貯湯式給湯機は、湯を貯湯する貯湯タンクと、浴槽への給湯を開閉する注
湯弁と、前記貯湯タンク内の高温湯と水とを混合して風呂給湯温度を調整する風呂給湯混合弁と、前記風呂給湯混合弁の下流に設けられ風呂給湯温度を検出する風呂給湯検出部と、前記貯湯タンクの湯と浴槽水とで熱交換するタンク外側に配置した熱交換器と、前記貯湯タンク上部と下部を連結する熱交換器の一次側循環経路と、前記一次側循環経路に介設したタンク循環ポンプと、熱交換器一次側出口の温度を検出する熱交一次出口温度検出部と、浴槽水を循環する熱交換器の二次側循環経路と、前記二次側循環経路に介設した風呂循環ポンプと、熱交換器の二次側出口の温度を検出する追い焚き温度検出部と、熱交換器の二次側入り口の温度を検出する風呂温度検出部とを備え、風呂給湯中に追い焚き温度検出部で検出される温度が、風呂給湯検出部で検出される温度より所定温度以上高い状態が、所定時間継続した時に、風呂給湯を停止することができ安全性が向上する。 The hot water storage type water heater of the first invention is a hot water storage tank for storing hot water, a pouring valve for opening and closing hot water to the bathtub, and hot water and water in the hot water storage tank are mixed to adjust the bath hot water temperature. A bath / hot water mixing valve, a bath / hot water detection unit that is provided downstream of the bath / hot water mixing valve to detect a bath / hot water temperature, and a heat exchanger disposed outside the tank for exchanging heat between the hot water in the hot water storage tank and bath water A primary circulation path of the heat exchanger connecting the upper and lower parts of the hot water storage tank, a tank circulation pump interposed in the primary circulation path, and a heat exchange primary outlet for detecting the temperature of the primary outlet of the heat exchanger A temperature detector, a secondary circulation path of the heat exchanger that circulates the bath water, a bath circulation pump interposed in the secondary circulation path, and a follow-up detector that detects the temperature of the secondary outlet of the heat exchanger. Detects the temperature at the firing temperature detector and the secondary inlet of the heat exchanger A bath temperature detection unit, and when the temperature detected by the reheating temperature detection unit during bath water supply is higher than the temperature detected by the bath water detection unit for a predetermined time, the bath water supply is turned on. It can be stopped and safety is improved.

第２の発明の貯湯式給湯機は、特に第１の発明において、風呂給湯中に、追い焚き温度検出部で検出される温度が、所定温度ｔ℃以上である状態を所定時間以上継続したとき、風呂給湯混合弁を水側に駆動することにより、熱交換器の二次側出口温度が異常に高い時にまず風呂給湯混合弁を水側に駆動して温度を下げてから風呂給湯を停止するので、安全性が向上する。 The hot water storage type water heater according to the second aspect of the present invention is the first aspect of the present invention, particularly when the temperature detected by the reheating temperature detection unit is not less than the predetermined temperature t.degree. By driving the bath / hot water mixing valve to the water side, when the secondary outlet temperature of the heat exchanger is abnormally high, the bath / hot water mixing valve is first driven to the water side to lower the temperature and then stop the bath water supply So safety is improved.

第３の発明の貯湯式給湯機は、特に第１または第２の発明において、風呂給湯混合弁を水側全開に駆動した後、一定時間後に追い焚き温度検出部で検出される温度が、風呂給湯検出部温度より所定温度Δｔ１より高い状態が継続していなければ、水側駆動を解除することにより、もし凍結予防運転やタンクの設置場所等によって西日が当たり配管や熱交換器が所定温度ｔ℃以上を誤検出しても、風呂給湯混合弁を水側全開にしている時間を最小限にし、風呂湯はり時間に対する影響を少なくできることから使用感が向上する。 The hot water storage type water heater according to the third aspect of the present invention is the first or second aspect of the present invention, in which the temperature detected by the reheating temperature detector after a certain time has elapsed after the bath hot water mixing valve is driven fully open on the water side. If the temperature higher than the predetermined temperature Δt1 does not continue to be higher than the hot water supply detection unit temperature, the water-side drive is canceled, and if the sun is hit by the freeze prevention operation or the installation location of the tank, the piping and the heat exchanger are at the predetermined temperature. Even if t ° C. or higher is erroneously detected, the time during which the bath hot water mixing valve is fully opened on the water side can be minimized, and the effect on the bath hot water can be reduced.

第４の発明の貯湯式給湯機は、特に第１〜３のいずれかの発明において、風呂給湯混合弁を水側に駆動した後、風呂の給湯運転を停止したときには水側に駆動することを解除することにより、風呂の給湯運転を停止したときには、また初期の状態から追い焚き温度検出部温度の温度を検出し、制御を行えるので、さらに誤検出に対して回復できるようになりさらに使用感が向上する。 The hot water storage type hot water heater of the fourth invention is driven in the water side when the hot water supply operation of the bath is stopped after the bath hot water mixing valve is driven to the water side in any one of the first to third inventions. By canceling, when the hot water supply operation of the bath is stopped, the temperature of the reheating temperature detection unit temperature can be detected and controlled from the initial state, so that it is possible to recover from false detection and further improve the usability. Will improve.

第５の発明の貯湯式給湯機は、風呂給湯中に、風呂温度検出部で検出される温度が、風呂給湯検出部で検出される温度より所定温度Δｔ２より低い時に、第１〜４の発明の制御を実行することにより、風呂給湯温度検出部の異常でないときに、追い焚き温度検出部の温度が異常であることを検出して、より正確な異常の切り分けが可能となる。 The hot water storage type water heater of the fifth invention is the first to fourth inventions when the temperature detected by the bath temperature detecting unit is lower than the predetermined temperature Δt2 than the temperature detected by the bath hot water detecting unit during bath hot water supply. By executing this control, when the bath hot water temperature detection unit is not abnormal, it is detected that the temperature of the reheating temperature detection unit is abnormal, and it is possible to more accurately classify the abnormality.

第６の発明の貯湯式給湯機は、特に第１〜５のいずれか１つの発明において、風呂給湯を停止したとき、リモコンで異常内容を報知することにより、風呂給湯が止まっている理由を速やかに使用者にお知らせすることができ、利便性の向上を図ることができる。 In any one of the first to fifth inventions, the hot water storage type water heater according to the sixth aspect of the invention promptly explains why the hot water supply has stopped by notifying the abnormal content with the remote control when the hot water supply is stopped. It is possible to notify the user and improve convenience.

以下、本発明の実施の形態について、図面を参照しながら説明する。なお、この実施の形態によって本発明が限定されるものではない。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

（実施の形態）
図１は、本実施の形態における貯湯式給湯機の構成図である。図１に示すように、湯を貯える貯湯タンク２０と、水を貯湯タンク２０に供給する給水口１０３と、浴槽へ湯を供給し貯湯タンク２０の上部に設けられた浴槽往き口１０４とを設けており、浴槽へ湯を供給できる構成となっている。 (Embodiment)
FIG. 1 is a configuration diagram of a hot water storage type water heater in the present embodiment. As shown in FIG. 1, a hot water storage tank 20 that stores hot water, a water supply port 103 that supplies water to the hot water storage tank 20, and a bathtub outlet 104 that supplies hot water to the bathtub and is provided above the hot water storage tank 20 are provided. The hot water can be supplied to the bathtub.

浴槽往き口１０４から浴槽までの間には、浴槽へ供給する湯の温度を設定温度にする風呂給湯混合弁２１と、浴槽２６への湯の供給の開閉を行う注湯弁２２が設けられており、
注湯弁２２の開閉によって浴槽２６へ湯が供給される。そして風呂給湯混合弁２１の下流側には、風呂給湯混合弁２１で混合された湯の温度を検出する風呂給湯検出部２３が設けられており、風呂給湯検出部２３で検出される湯の温度が、設定温度となるように、風呂給湯混合弁２１が駆動される。 Between the bathtub opening 104 and the bathtub, there are provided a hot water supply mixing valve 21 for setting the temperature of hot water supplied to the bathtub to a set temperature, and a pouring valve 22 for opening and closing the supply of hot water to the bathtub 26. And
Hot water is supplied to the bathtub 26 by opening and closing the pouring valve 22. Further, on the downstream side of the bath / hot water mixing valve 21, there is provided a bath / hot water detection unit 23 for detecting the temperature of the hot water mixed by the bath / hot water mixing valve 21, and the temperature of the hot water detected by the bath / hot water detection unit 23. However, the bath / hot water mixing valve 21 is driven so as to reach the set temperature.

また、浴槽２６へ湯を供給するのとは別に、浴槽２６内の湯水を追い焚きするための熱交換器３０が設けられており、熱交換器３０は貯湯タンク２０内の高温水が流れる１次側回路と、浴槽２６内の湯水が流れる２次側回路で構成されている。 In addition to supplying hot water to the bathtub 26, a heat exchanger 30 is provided for replenishing hot water in the bathtub 26, and the hot water in the hot water storage tank 20 flows through the heat exchanger 30 1. It is comprised by the secondary side circuit and the secondary side circuit through which the hot water in the bathtub 26 flows.

また、熱交換器３０における１次側回路には、貯湯タンク２０内の高温水が流入する熱交１次入り口１０５と、熱交換器３０から貯湯タンク２０へ出て行く熱交１次出口１０６を有し、一方、浴槽水が流れる２次側回路には、浴槽水の湯水を熱交換器３０に流入させる熱交２次入口１０７と、熱交換器３０から浴槽２６へ出て行く熱交２次出口１０８を有している。 The primary circuit in the heat exchanger 30 includes a heat exchange primary inlet 105 through which high-temperature water in the hot water storage tank 20 flows, and a heat exchange primary outlet 106 that exits from the heat exchanger 30 to the hot water storage tank 20. On the other hand, in the secondary circuit through which the bathtub water flows, the heat exchange secondary inlet 107 through which the hot water of the bathtub water flows into the heat exchanger 30 and the heat exchange that goes out of the heat exchanger 30 to the bathtub 26 are provided. A secondary outlet 108 is provided.

また、浴槽２６から２次側回路へ湯を供給する配管を風呂往き配管１０９とし、２次側回路から浴槽２６へ湯が戻ってくる配管を風呂戻り配管１１０としている。 Also, a pipe for supplying hot water from the bathtub 26 to the secondary circuit is a bath outlet pipe 109, and a pipe from which the hot water returns from the secondary circuit to the bathtub 26 is a bath return pipe 110.

そして、１次側回路には、前記浴槽往き口１０４とは別口として貯湯タンク２０の上方部に設けられた熱交換器往き口１１１から高温水が供給されるとともに、熱交換器３０で放熱した後の温水を戻すために、貯湯タンク２０の下方部に熱交換器戻り口１１２を設けており、熱交換器往き口１１１と熱交換器戻り口１１２の間で貯湯タンク２０内の高温水を循環させるタンク循環回路を形成している。タンク循環回路には、タンク内の湯水を循環させるタンク循環ポンプ３１が設けられている。 The primary circuit is supplied with high-temperature water from a heat exchanger outlet 111 provided in an upper portion of the hot water storage tank 20 as a separate port from the bathtub outlet 104, and radiates heat by the heat exchanger 30. In order to return the hot water after being heated, a heat exchanger return port 112 is provided in the lower part of the hot water storage tank 20, and the hot water in the hot water storage tank 20 is located between the heat exchanger outlet 111 and the heat exchanger return port 112. The tank circulation circuit which circulates is formed. The tank circulation circuit is provided with a tank circulation pump 31 for circulating hot water in the tank.

一方、２次側回路では、浴槽２６から風呂往き配管１０９を通って、低温水が熱交換器３０へ供給されるとともに、熱交換器３０で貯湯タンク２０の高温水から熱をもらい、再度風呂戻り配管１１０を通って浴槽２６へ戻る。 On the other hand, in the secondary circuit, low-temperature water is supplied from the bathtub 26 to the heat exchanger 30 through the bath outlet pipe 109, and the heat exchanger 30 receives heat from the high-temperature water in the hot water storage tank 20 and again takes a bath. The return pipe 110 is returned to the bathtub 26.

また２次側回路には、浴槽２６内の湯水を循環させる風呂循環ポンプ２７が設けられている。また、風呂給湯混合弁２１から浴槽２６へ湯を供給する経路は、２次側回路へ接続されており、浴槽への湯張り時の湯張り経路は、２次側回路の風呂往き配管１０９と、風呂戻り配管１１０の両配管から、浴槽へ湯が供給されている。 The secondary circuit is provided with a bath circulation pump 27 for circulating hot water in the bathtub 26. Further, the path for supplying hot water from the bath hot water mixing valve 21 to the bathtub 26 is connected to the secondary circuit, and the hot water filling path when filling the bathtub is connected to the bath outlet pipe 109 of the secondary circuit. Hot water is supplied from both pipes of the bath return pipe 110 to the bathtub.

以上のように構成された貯湯式給湯機について、以下、その動作および作用について説明する。 Hereinafter, the operation and action of the hot water storage type water heater configured as described above will be described.

まず、風呂自動で風呂にお湯をはる時には、本実施の形態では、風呂給湯温度検出部２３が注湯弁２２の下流に設けられており、風呂給湯温度検出部２３のさらに下流側で、２次側回路に合流している。 First, when hot water is poured into a bath automatically, in this embodiment, a hot water supply temperature detector 23 is provided downstream of the hot water supply valve 22, and further downstream of the hot water supply temperature detector 23, It joins the secondary circuit.

そして、貯湯タンク２０の湯と水道水を風呂給湯混合弁２１で混合させるとともに、注湯弁２２を開き、風呂給湯検出部２３が設定温度になるように風呂給湯混合弁２１を調整して、風呂給湯経路Ａ２４と風呂給湯経路Ｂ２５の２経路で浴槽２６に湯はりをする。 Then, the hot water in the hot water storage tank 20 and tap water are mixed by the bath / hot water mixing valve 21, the pouring valve 22 is opened, and the bath / hot water mixing valve 21 is adjusted so that the bath / hot water detection unit 23 reaches the set temperature, Hot water is applied to the bathtub 26 through two paths, a bath hot water supply path A24 and a bath hot water supply path B25.

そして湯はりが完了し、風呂保温に入ると浴槽水吸い込み側の風呂循環ポンプ２７を作動させフロースイッチ２８で風呂にお湯があることを判断して風呂温度検出部２９が風呂設定温度より低い場合、熱交換器３０の一次側のタンク循環ポンプ３１を作動させ貯湯タンク２０の上部より熱交換器1次側循環経路３２にお湯を循環させ熱交換器３０の２次側循環経路３３のお湯へ熱交換して浴槽温度を上げ、熱交一次出口温度検出部３４、熱交換
器３０の２次側出口の追い焚き温度検出部３５、風呂温度検出部２９の温度検出で最良の風呂追い焚きをする構成にしている。 When the hot water filling is completed and the bath is kept warm, the bath circulation pump 27 on the bathtub water suction side is operated to determine that there is hot water in the bath with the flow switch 28, and the bath temperature detecting unit 29 is lower than the bath set temperature. Then, the tank circulation pump 31 on the primary side of the heat exchanger 30 is operated to circulate hot water from the upper part of the hot water storage tank 20 through the heat exchanger primary side circulation path 32 to the hot water of the secondary side circulation path 33 of the heat exchanger 30. The bath temperature is raised by heat exchange, and the best bath reheating is detected by the temperature detection of the heat exchange primary outlet temperature detecting unit 34, the reheating temperature detecting unit 35 of the secondary side outlet of the heat exchanger 30, and the bath temperature detecting unit 29. It is configured to do.

風呂給湯時に従来は風呂給湯温度検出部２３のみを検出していたが、本発明では熱交換器３０の２次側出口の追い焚き温度検出部３５の温度も検出し、熱交換器３０の１次側のタンク循環ポンプ２７の電気回路が何かの不具合で連続作動になり、風呂循環経路Ｂ２５のお湯か熱交換され風呂設定温度より熱いお湯が給湯されようとした時、追い焚き温度検出部３５の温度が風呂給湯検出部２３の温度より８℃以上高い状態が３０秒以上継続した時に注湯弁２２を閉にして風呂給湯を停止する。これにより風呂設定温度より高いお湯を風呂に給湯するのを防ぎ安全性が向上する。 Conventionally, only the bath hot water temperature detection unit 23 is detected at the time of bath hot water supply. However, in the present invention, the temperature of the reheating temperature detection unit 35 at the secondary side outlet of the heat exchanger 30 is also detected. When the electric circuit of the tank circulation pump 27 on the next side is continuously operated due to a malfunction, the hot water of the bath circulation path B25 is exchanged, and hot water hotter than the bath set temperature is about to be supplied. When the temperature of 35 continues to be higher by 8 ° C. or more than the temperature of the bath / hot water detection unit 23 for 30 seconds or more, the hot water supply valve 22 is closed to stop the bath / hot water supply. This prevents hot water higher than the bath set temperature from being supplied to the bath and improves safety.

さらに、やけどが発生するような高温のお湯が注湯されたときつまり、風呂給湯中に上記したタンク循環ポンプ２７の不具合により追い焚き温度検出部３５の温度が６０℃以上の状態が１秒以上継続した時、風呂給湯混合弁２１の調整を水側全開に駆動するようにして風呂給湯経路Ｂ２５の温度をすばやく下げることにより、風呂には６０℃以上の温度のお湯がほとんど入らなくなるため、更に安全性を向上することができる。 Furthermore, when hot water that causes burns is poured, that is, when the temperature of the reheating temperature detector 35 is 60 ° C. or higher due to a malfunction of the tank circulation pump 27 during bath hot water supply, it is 1 second or longer. When continued, the temperature of the bath hot water supply path B25 is quickly lowered by driving the adjustment of the bath hot water mixing valve 21 to fully open the water side, so that almost no hot water having a temperature of 60 ° C. or more enters the bath. Safety can be improved.

さらに、一度６０℃以上を検出しても３０秒後に、追い焚き温度検出部で検出される温度が、風呂給湯検出部で検出される温度よりも８℃以上高い状態が継続していなければ、水側全開駆動を解除するものである。もし凍結予防運転やタンクの設置場所等によって西日が当たり配管や熱交換器が６０℃以上を誤検出しても、３０秒後には正しい温度になっているので、３０秒後には通常の温度制御に戻って、風呂に湯を張ることができるので、風呂給湯混合弁を水側全開にしている時間を最小限にし、風呂湯はり時間が通常より大幅に長くなってしまうなどの湯張り時間対する影響を少なくできることから使用感が向上する。 Further, even if 60 ° C. or higher is detected once, if the temperature detected by the reheating temperature detection unit is not higher than the temperature detected by the bath / hot water detection unit by 30 ° C. after 30 seconds, The water side full open drive is canceled. Even if the sun hits due to freeze-prevention operation or the installation location of the tank, etc., even if the pipe or heat exchanger erroneously detects 60 ° C or higher, it will be at the correct temperature after 30 seconds. Returning to control, you can fill the bath with hot water, so the time to keep the bath hot water mixing valve fully open on the water side is minimized, and the hot water filling time such as the bath hot water time becomes significantly longer than usual The feeling of use is improved because the effect on the device can be reduced.

また、風呂給湯混合弁の調整を水側全開に駆動した後、風呂の給湯運転を停止したときには水側全開に駆動することを解除するように構成としている。これにより、たとえば浴槽の残湯や、風呂の水位を検出するため、風呂注湯を停止したときには風呂混合弁が水側全開になることを解除することで、さらに誤検知などで水側全開になっているときに、混合弁の駆動位置を通常の状態に戻せるのでさらに使用感を向上することが可能となる。 In addition, after the adjustment of the bath hot water mixing valve is driven to the water side full open, when the hot water supply operation of the bath is stopped, the drive to the water side full open is released. In this way, for example, to detect the remaining hot water in the bathtub or the water level of the bath, the bath mixing valve is released from being fully open when the bath pouring is stopped. Thus, the driving position of the mixing valve can be returned to the normal state, so that the feeling of use can be further improved.

また、本発明の貯湯式給湯機には、浴槽２６内の温度を検出する風呂温度検出部２９が設けられており、風呂給湯中に風呂温度検出部２９で検出される温度が、風呂給湯検出部２３で検出される温度より８℃未満の時にのみ、給湯を停止するようにしている。これによって、風呂給湯温度検出部２３が故障しており、実際の温度より８℃以上低く検出しているときは、追い焚き温度検出部の温度が８℃異常高くても、追い焚き温度検出部は正常であることとなる。このような時は風呂給湯温度検出部の検出が異常であることが確定する。それ以外の風呂給湯温度が異常でないときに、追い焚き温度検出部の温度異常を検出するようにしているので、より正確な異常の切り分けが可能となる。 Further, the hot water storage type water heater of the present invention is provided with a bath temperature detection unit 29 for detecting the temperature in the bathtub 26, and the temperature detected by the bath temperature detection unit 29 during bath hot water detection is the bath hot water detection. Only when the temperature detected by the unit 23 is less than 8 ° C., the hot water supply is stopped. Thus, when the bath hot water temperature detecting unit 23 is malfunctioning and detected 8 ° C. or more lower than the actual temperature, even if the temperature of the reheating temperature detecting unit is abnormally high by 8 ° C., the reheating temperature detecting unit Will be normal. In such a case, it is determined that the detection of the bath hot water temperature detection unit is abnormal. Since the temperature abnormality of the reheating temperature detection unit is detected when the bath water supply temperature other than that is not abnormal, it is possible to more accurately classify the abnormality.

また、追い焚き温度検出部にて風呂給湯を停止したとき、リモコンで異常内容を報知する構成としている。この構成により、使用者に的確に商品の異常状態をお知らせすることができるため、サービス性が向上することでより迅速に修理することが可能となる。 In addition, when the hot water supply is stopped by the reheating temperature detection unit, the remote controller notifies the abnormality content. With this configuration, it is possible to accurately notify the user of the abnormal state of the product, so that it is possible to repair more quickly by improving serviceability.

以上のように、本発明にかかる貯湯式給湯機の構成は、熱源をヒートポンプ給湯機、電気ヒータや燃料電池を使用したコジェネレーションシステム、ガスなどを使用した様々な貯湯式給湯機等において利用することができる。 As described above, the configuration of the hot water storage type hot water heater according to the present invention is used in a heat pump hot water heater, a cogeneration system using an electric heater and a fuel cell, various hot water storage hot water heaters using gas, and the like. be able to.

本発明の実施の形態１における給湯機の構成図Configuration diagram of a water heater in Embodiment 1 of the present invention 従来の貯湯式給湯機の構成図Configuration diagram of a conventional hot water storage water heater

符号の説明Explanation of symbols

２０貯湯タンク
２１風呂給湯混合弁
２２注湯弁
２３風呂給湯検出部
２７風呂循環ポンプ
２９風呂温度検出部
３０熱交換器
３１タンク循環ポンプ
３２１次側回路
３３２次側回路
３４熱交１次出口温度検出部
３５追い焚き温度検出部 DESCRIPTION OF SYMBOLS 20 Hot water storage tank 21 Bath hot water supply mixing valve 22 Hot water supply valve 23 Bath hot water detection part 27 Bath circulation pump 29 Bath temperature detection part 30 Heat exchanger 31 Tank circulation pump 32 Primary side circuit 33 Secondary side circuit 34 Heat exchange primary outlet Temperature detector 35 Reheating temperature detector

Claims

湯を貯湯する貯湯タンクと、浴槽への給湯を開閉する注湯弁と、前記貯湯タンク内の高温湯と水とを混合して風呂給湯温度を調整する風呂給湯混合弁と、前記風呂給湯混合弁の下流に設けられ風呂給湯温度を検出する風呂給湯検出部と、前記貯湯タンクの湯と浴槽水とで熱交換するタンク外側に配置した熱交換器と、前記貯湯タンク上部と下部を連結する熱交換器の一次側循環経路と、前記一次側循環経路に介設したタンク循環ポンプと、熱交換器一次側出口の温度を検出する熱交一次出口温度検出部と、浴槽水を循環する熱交換器の二次側循環経路と、前記二次側循環経路に介設した風呂循環ポンプと、熱交換器の二次側出口の温度を検出する追い焚き温度検出部と、熱交換器の二次側入り口の温度を検出する風呂温度検出部とを備え、風呂給湯中に追い焚き温度検出部で検出される温度が、風呂給湯検出部で検出される温度より所定温度以上高い状態が、所定時間継続した時に、風呂給湯を停止することを特徴とする貯湯式給湯機。 A hot water storage tank for storing hot water, a pouring valve for opening and closing hot water supply to the bathtub, a hot water hot water in the hot water storage tank and a bath hot water mixing valve for adjusting the hot water temperature, and the bath hot water mixing A bath / hot water detection unit that is provided downstream of the valve and detects a bath / hot water temperature, a heat exchanger disposed outside the tank for exchanging heat between the hot water in the hot water storage tank and bath water, and an upper portion and a lower portion of the hot water storage tank are connected to each other. Heat exchanger primary side circulation path, tank circulation pump interposed in the primary side circulation path, heat exchanger primary outlet temperature detection part for detecting the temperature of the heat exchanger primary side outlet, and heat circulating in the bath water A secondary circulation path of the exchanger, a bath circulation pump interposed in the secondary circulation path, a reheating temperature detection unit for detecting the temperature of the secondary outlet of the heat exchanger, and a heat exchanger A bath temperature detector that detects the temperature of the entrance Hot water storage system characterized in that when the temperature detected by the reheating temperature detection unit during hot water supply is higher than the temperature detected by the bath hot water detection unit for a predetermined time, the hot water supply is stopped. Water heater.

風呂給湯中に、追い焚き温度検出部で検出される温度が、所定温度ｔ℃以上である状態を所定時間以上継続したとき、風呂給湯混合弁を水側に駆動することを特徴とする請求項１に記載の貯湯式給湯機。 The bath hot water mixing valve is driven to the water side when the temperature detected by the reheating temperature detecting unit during bath hot water continues for a predetermined time or more when the temperature detected by the reheating temperature detection unit is higher than the predetermined temperature t ° C. 1. A hot-water storage water heater according to 1.

風呂給湯混合弁を水側全開に駆動した後、一定時間後に追い焚き温度検出部で検出される温度が、風呂給湯検出部温度より所定温度Δｔ１より高い状態が継続していなければ、水側駆動を解除することを特徴とする請求項２に記載の貯湯式給湯機。 After the bath / hot water mixing valve is driven fully open, if the temperature detected by the reheating temperature detection unit after a certain time does not continue to be higher than the bath / hot water detection unit temperature by a predetermined temperature Δt1, the water side drive The hot water storage type water heater according to claim 2, wherein the hot water storage type water heater is released.

風呂給湯混合弁を水側に駆動した後、風呂の給湯運転を停止したときには水側に駆動することを解除することを特徴とする請求項１〜３のいずれか１項に記載の貯湯式給湯機。 The hot water storage hot water supply according to any one of claims 1 to 3, wherein after the bath hot water mixing valve is driven to the water side, the driving to the water side is canceled when the hot water supply operation of the bath is stopped. Machine.

風呂給湯中に、風呂温度検出部で検出される温度が、風呂給湯検出部で検出される温度より所定温度Δｔ２より低い時に、請求項１〜４のいずれか１項に記載の制御を実行することを特徴とする貯湯式給湯機。 The control according to any one of claims 1 to 4 is executed when the temperature detected by the bath temperature detection unit is lower than a predetermined temperature Δt2 during bath hot water supply by a temperature detected by the bath hot water detection unit. A hot water storage water heater characterized by that.

請求項１〜５のいずれか１項の貯湯式給湯機において、風呂給湯を停止したとき、リモコンで異常内容を報知することを特徴とする貯湯式給湯機。 The hot water storage type hot water supply apparatus according to any one of claims 1 to 5, wherein when the hot water supply to the bath is stopped, an abnormal content is notified by a remote controller.