【０００１】
【産業上の利用分野】
本発明は、貯湯式の給湯装置、例えばセミ貯湯式の給湯装置に関し、貯湯缶体内に貯湯された高温の温水を水と混合して、所定の設定給湯温度にして給湯することができると共に、貯湯缶体内に風呂追い焚き用の熱交換コイルや暖房用の熱交換コイルを通して風呂追い焚き運転や暖房運転を可能とした貯湯式給湯装置に関する。
【０００２】
【従来の技術】
従来、セミ貯湯タイプといわれる、比較的貯湯量の小さい貯湯缶体を備えた給湯装置においては、一般に、貯湯量の小さい缶体に貯湯された比較的高温の温水を、水と混水することで設定給湯温度の温水を給湯するようにしている。このため温水と水とを所定の設定給湯温度に混合調節するための混合調節器が設けられている。また特に、風呂追い焚き運転や暖房運転がなされる場合には、浴槽や暖房の末端放熱器から送られてくる流水を貯湯缶体内の熱交換コイルを通す間に充分効果的に高温に加熱する必要があることから、貯湯缶体の貯湯温度自体をかなり高温、例えば８０℃に保持するように構成されていた。
【０００３】
【発明が解決しようとする課題】
ところが、上記従来の貯湯式給湯装置において、温水給湯を行うための混合調節器が出湯管側通路全開状態のまま固着してしまうという故障が往々にして発生するが、そのような混合調節器の故障があるときに、風呂追い焚き運転や暖房運転が行われると、貯湯缶体での貯湯温度が高温とされるため、風呂追い焚き運転中や暖房運転中に使用者が故障を知らずに給湯を行ったりする場合には、予期しない高温の温水が給湯され、火傷等を負う問題が生じてくる。
【０００４】
そこで本発明は、上記従来装置の欠点を解消し、出湯温水と水との混合比を調節する混合調節器が、出湯管側通路全開状態のまま固着状態となって故障した場合においても、風呂追い焚き運転や暖房運転を引き続き行うことができ、しかも給湯運転において使用者が火傷等を負う危険性を充分に減ずることができる貯湯式給湯装置の提供を目的とする。
【０００５】
【課題を解決するための手段】
上記目的を達成するため、本発明の貯湯式給湯装置は、加熱用のバーナと該バーナによって加熱される給湯用の貯湯槽を備え且つ暖房や風呂追い焚きのための熱交換コイルを前記貯湯槽内に配設した貯湯缶体と、該貯湯缶体への入水管と、前記貯湯缶体からの出湯管と、前記入水管の途中から分岐して出湯管へ直接接続する混水用のバイパス管と、該バイパス管と前記出湯管との合流点にあって前記バイパス管側からの水量と前記出湯管側からの温水量との混合比を調節して設定給湯温度の温水とする混合調節器とを有する貯湯式給湯装置であって、平常時において前記暖房運転や風呂追い焚き運転がなされる場合には前記貯湯槽の貯湯温度を少なくとも７０℃以上の一定の高温に保持するように制御すると共に、前記混合調節器が出湯管側通路全開状態のまま故障した場合には安全動作として暖房運転や風呂追い焚き運転における前記貯湯槽の貯湯保持温度を６０℃以下５０℃以上の一定温度に変更するコントローラを設けたことを特徴としている。
【０００６】
【作用】
上記本発明の特徴によれば、コントローラは平常時には、暖房運転や風呂追い焚き運転がなされる場合には貯湯缶体の貯湯槽の温度を７０℃以上の一定温度に保持する。これによって、貯湯槽内の熱交換コイルを通る暖房用水や浴槽循環水が充分に加熱されることができる。また暖房運転や風呂追い焚き運転中に給湯も同時に行われる場合には、コントローラは混合調節器による混合比を調節することで、出湯管からの高温水をバイパス管からの充分な水と混合して所定の設定給湯温度の温水を給湯することができる。
一方、給湯運転中等において混合調節器が出湯管側通路の全開状態で故障した場合には、コントローラは、装置の安全動作として、暖房運転や風呂追い焚き運転が行われる場合における前記貯湯缶体の貯湯槽の貯湯保持温度を７０℃以上の一定温度から６０℃以下５０℃以上の一定温度へと変更する。よって暖房運転や風呂追い焚き運転がなされる場合には、貯湯温度が６０℃〜５０℃の一定温度と低下されるので加熱効率は悪くなるものの、暖房や風呂追い焚きを行うことができる。しかも暖房や風呂追い焚きの運転中に給湯がなされた場合でも、貯湯温度が６０℃以下５０℃以上の一定温度に変更されているため、貯湯槽の温水だけが混水されることなく出湯管側通路全開状態の混合調節器を通って給湯されても、端末のカランから注湯されるまでにはさらに多少の温度低下がなされることもあって、使用者が火傷等を負うといったことが回避できる。
【０００７】
【実施例】
以下に本発明を実施例に基づいて説明する。図１は本発明実施例を示す貯湯式給湯装置の全体構成図、図２はコントローラによる制御フローチャートである。
【０００８】
図１において、貯湯缶体１０に対して入水管２０と出湯管４０が接続されており、貯湯缶体１０の近くで前記入水管２０から分岐されたバイパス管３０が出湯管４０に接続されている。バイパス管３０の出湯管４０への合流点には混合調節器５０が設けられている。混合調節器５０よりも下流は給湯管６０になっている。
前記貯湯缶体１０は、セミ貯湯タイプの貯湯缶体とし、缶体１０内下部に燃焼室１１が設けられ、石油バーナ１２による燃焼が行われる。前記石油バーナ１２はガスバーナであってもよい。前記燃焼室１１から立設する排気管１３の外側は貯湯槽１４となっており、温水が貯湯される。貯湯槽１４には前記排気管１３に近い方に暖房用熱交換コイル１５が設けられ、遠い方に風呂追い焚き用熱交換コイル１６が設けられている。また貯湯缶体１０内の貯湯温度を検出する貯湯温度センサ１７が設けられている。
【０００９】
前記入水管２０には入水温度センサ２１と入水流量センサ２２とが設けられている。また前記混合調節器５０よりも下流の給湯管６０に給湯温度センサ６１、給湯流量センサ６２が設けられている。混合調節器５０を通って給湯管６０に送り込まれた温水は末端の給湯カラン６３から供され、また途中で分岐された風呂給湯管６４を通って浴槽に供されたりする。
７０は装置の動作を制御するコントローラで、マイコンを内蔵し、装置各部のセンサからの情報やリモコンからの指令を入力し、所定のプログラムに従って所定の制御動作を石油バーナ１２や混合調節器５０、その他に出力する。
【００１０】
前記コントローラ７０による給湯運転制御例を、図２も参照して説明すると、今、給湯カラン６３等が開いて、給湯が開始されると、コントローラ７０は、入水温度センサ２１からの入水温度、貯湯温度センサ１７からの貯湯温度、及び使用者等によって設定された設定給湯温度とから、設定給湯温度の温水が給湯管６０に給湯されるように混合調節器５０によるバイパス管３０からの水と出湯管４０からの温水との混合比を演算して、その混合比となるように混合調節器５０を調節制御する（Ｓ１）。給湯運転中は一定の時間間隔毎に、また設定給湯温度が変更される都度に再演算して適当な混合比を確保する。
前記において、給湯運転のみが行われる場合には、コントローラ７０は貯湯槽１４の温度を設定給湯温度、若しくは設定給湯温度よりも少し高い温度に調節するようにすることができる。勿論、暖房運転や風呂追い焚き運転が行われる場合には、コントローラ７０は貯湯槽１４の貯湯保持温度として、７０℃以上の一定温度、例えば８０℃に保持されるように石油バーナ１２の燃焼を制御する。
【００１１】
そして給湯運転中等においては、混合調節器５０が出湯管４０側通路全開の状態のまま固着してしまうという故障が生じた場合には、コントローラ７０による制御が働かなくなり、出湯管４０からの温水がそのまま混水されることなく給湯されることになる。そこで本発明ではコントローラ７０は、混合調節器５０が出湯管４０側通路の全開状態のまま故障している場合には（Ｓ２でイエス）、安全動作として、暖房運転及び風呂追い焚き運転での前記貯湯槽１４の貯湯保持温度を、平常時における前記７０℃以上の一定温度、実施例では８０℃、から６０℃以下で５０℃以上の一定温度、実施例では６０℃に変更設定する（Ｓ３）構成としている。また混合調節器５０の故障表示をコントローラ７０の表示部やリモコンの表示部に行う構成としている（Ｓ３）。
なお上記において、混合調節器５０が出湯管４０側通路全開状態のまま故障している場合には、コントローラ７０による混合比調節指令が混合調節器５０に発せられても、混合調節器５０の混合比調節手段、例えば調節弁等が出湯管４０側通路全開位置から動かないことから、この状態が混合調節器５０に内蔵のリミットスイッチ等を介してコントーラ７０により判断され、また給湯温度センサ６１が検出する給湯温度の変化等から判断され、その結果、混合調節器５０が出湯管４０側通路全開状態で故障していると判定される。
【００１２】
【発明の効果】
本発明は以上の構成よりなり、請求項１に記載の貯湯式給湯装置によれば、平常時において暖房運転や風呂追い焚き運転がなされる場合には貯湯槽の貯湯温度を少なくとも７０℃以上の一定の高温に保持するように制御すると共に混合調節器が出湯管側通路全開状態のまま故障した場合には安全動作として暖房運転や風呂追い焚き運転における前記貯湯槽の貯湯保持温度を６０℃以下５０℃以上の一定温度に変更するコントローラを設けたので、混合調節器が出湯管側通路全開状態のまま故障した場合においても、風呂追い焚き運転や暖房運転を、多少加熱効率の低下を招くものの、引き続き行うことができる。しかも風呂追い焚き運転や暖房運転中に給湯運転が同時になされた場合でも、貯湯温度自体が低減されているので使用者が火傷等を負う危険性を充分に減ずることができる。勿論、混合調節器が故障していない平常時には充分高い貯湯温度でもって暖房加熱や風呂追い焚き加熱を充分効果的に行うことができると共に、給湯も正常な混合調節器によって充分に混水がなされた所定の設定給湯温度の温水を給湯することができる。
【図面の簡単な説明】
【図１】本発明実施例を示す貯湯式給湯装置の全体構成図である。
【図２】コントローラによる制御フローチャートである。
【符号の説明】
１０ 貯湯缶体
１２ 石油バーナ
１４ 貯湯槽
１５ 暖房用熱交換コイル
１６ 風呂追い焚き用熱交換コイル
２０ 入水管
３０ バイパス管
４０ 出湯管
５０ 混合調節器
７０ コントローラ[0001]
[Industrial applications]
The present invention relates to a hot water supply type hot water supply device, for example, a semi-hot water supply type hot water supply device, by mixing high-temperature hot water stored in a hot water storage canister with water, it is possible to supply hot water to a predetermined set hot water supply temperature, The present invention relates to a hot-water storage type hot water supply device that enables a bath reheating operation and a heating operation through a heat exchange coil for bath reheating and a heat exchange coil for heating in a hot water storage body.
[0002]
[Prior art]
Conventionally, in a hot water supply apparatus having a hot water storage canister having a relatively small amount of hot water, which is referred to as a semi-hot water storage type, generally, relatively high-temperature hot water stored in a can body having a small amount of hot water is mixed with water. Is used to supply hot water at the set hot water supply temperature. Therefore, a mixing controller for mixing and adjusting the hot water and the water to a predetermined set hot water supply temperature is provided. In particular, when a bath reheating operation or a heating operation is performed, the flowing water sent from the bath tub or the terminal radiator of the heating is sufficiently effectively heated to a high temperature while passing through the heat exchange coil in the hot water storage can body. Because of the necessity, the hot water storage temperature of the hot water storage can was maintained at a considerably high temperature, for example, 80 ° C.
[0003]
[Problems to be solved by the invention]
However, in the above-mentioned conventional hot-water storage type hot water supply apparatus, a failure often occurs in which the mixing regulator for performing hot water supply is stuck in a state in which the outlet pipe side passage is fully opened, and such a failure occurs. If there is a malfunction, the hot water storage temperature in the hot water storage canister will be high if the bath reheating operation or heating operation is performed, so the user will supply hot water during the bath reheating operation or heating operation without knowing the failure. In such a case, unexpectedly high temperature hot water is supplied, causing a problem of burns or the like.
[0004]
Therefore, the present invention solves the above-mentioned drawbacks of the conventional apparatus, and even when the mixing controller for adjusting the mixing ratio of hot water and hot water is stuck in a state in which the hot water pipe side passage is fully opened and breaks down, a bath is provided. It is an object of the present invention to provide a hot water storage type hot water supply apparatus that can continuously perform a reheating operation and a heating operation and that can sufficiently reduce a risk of a user getting burned in a hot water supply operation.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a hot water storage type hot water supply apparatus of the present invention includes a heating burner and a hot water storage tank for hot water supply heated by the burner, and includes a heat exchange coil for heating or reheating a bath. A hot water storage can body disposed therein, a water inlet pipe to the hot water storage can body, a hot water outlet pipe from the hot water storage can body, and a bypass for water mixing that branches off from the middle of the water inlet pipe and is directly connected to the hot water outlet pipe. Mixing control at the junction of the pipe and the bypass pipe and the tapping pipe to adjust the mixing ratio between the amount of water from the bypass pipe side and the quantity of hot water from the tapping pipe side to obtain hot water at a set hot water supply temperature. A hot-water supply type hot water supply device having a water heater, wherein when the heating operation or the bath reheating operation is performed in normal times, the hot water storage temperature of the hot water storage tank is controlled to be maintained at a constant high temperature of at least 70 ° C. or higher. And the mixing controller is on the tapping pipe side. A controller is provided for changing the hot water storage temperature of the hot water storage tank to a constant temperature of 60 ° C. or less and 50 ° C. or more in a heating operation or a bath reheating operation as a safe operation when a failure occurs while the road is fully opened. .
[0006]
[Action]
According to the feature of the present invention, the controller normally keeps the temperature of the hot water storage tank of the hot water storage canister at a constant temperature of 70 ° C. or higher when the heating operation or the bath reheating operation is performed. Thereby, the heating water and the bathtub circulating water passing through the heat exchange coil in the hot water storage tank can be sufficiently heated. If hot water is also supplied simultaneously during heating operation or bath reheating operation, the controller adjusts the mixing ratio by the mixing controller to mix high-temperature water from the tapping pipe with sufficient water from the bypass pipe. Hot water at a predetermined set hot water supply temperature can be supplied.
On the other hand, when the mixing controller fails in the fully opened state of the tapping pipe side passage during the hot water supply operation or the like, the controller determines whether or not the hot water storage can body in the case of performing the heating operation or the bath reheating operation as the safety operation of the device. The storage temperature of the hot water storage tank is changed from a constant temperature of 70 ° C. or more to a constant temperature of 60 ° C. or less and 50 ° C. or more. Therefore, when the heating operation or the bath reheating operation is performed, the hot water storage temperature is reduced to a constant temperature of 60 ° C. to 50 ° C., so that the heating efficiency is deteriorated, but the heating or the bath reheating can be performed. In addition, even when hot water is supplied during heating or bath reheating, the hot water storage temperature has been changed to a constant temperature of 60 ° C or less and 50 ° C or more, so that only hot water in the hot water tank is not mixed. Even if hot water is supplied through the mixing controller with the side passage fully open, the temperature may drop slightly before the hot water is poured from the terminal curan, and the user may get burned. Can be avoided.
[0007]
【Example】
Hereinafter, the present invention will be described based on examples. FIG. 1 is an overall configuration diagram of a hot water supply type hot water supply apparatus according to an embodiment of the present invention, and FIG. 2 is a control flowchart by a controller.
[0008]
In FIG. 1, a water inlet pipe 20 and a water outlet pipe 40 are connected to the hot water storage canister 10, and a bypass pipe 30 branched from the water inlet pipe 20 near the hot water storage canister 10 is connected to the hot water outlet pipe 40. I have. At the junction of the bypass pipe 30 and the tapping pipe 40, a mixing controller 50 is provided. Downstream of the mixing controller 50 is a hot water supply pipe 60.
The hot water storage body 10 is a semi-hot water storage type hot water storage body, and a combustion chamber 11 is provided at a lower portion in the can body 10, and combustion by an oil burner 12 is performed. The oil burner 12 may be a gas burner. The outside of the exhaust pipe 13 erected from the combustion chamber 11 is a hot water storage tank 14 for storing hot water. In the hot water storage tank 14, a heat exchange coil 15 for heating is provided near the exhaust pipe 13, and a heat exchange coil 16 for reheating the bath is provided far away. Further, a hot water storage temperature sensor 17 for detecting the temperature of hot water stored in hot water storage can 10 is provided.
[0009]
The water inlet pipe 20 is provided with a water temperature sensor 21 and a water flow sensor 22. A hot water supply temperature sensor 61 and a hot water supply flow rate sensor 62 are provided in a hot water supply pipe 60 downstream of the mixing controller 50. The hot water sent to the hot water supply pipe 60 through the mixing controller 50 is supplied from a hot water supply curan 63 at the end, and is supplied to a bathtub through a bath hot water supply pipe 64 branched on the way.
Reference numeral 70 denotes a controller for controlling the operation of the apparatus, which incorporates a microcomputer, inputs information from sensors of various parts of the apparatus and commands from a remote controller, and performs predetermined control operations according to a predetermined program on the oil burner 12, the mixing controller 50, and the like. Other output.
[0010]
An example of the hot water supply operation control by the controller 70 will be described with reference to FIG. 2. Now, when the hot water supply curan 63 or the like is opened and hot water supply is started, the controller 70 sets the input water temperature from the input water temperature sensor 21 and the hot water storage. From the hot water storage temperature from the temperature sensor 17 and the set hot water supply temperature set by the user or the like, the mixing controller 50 mixes the hot water with the hot water at the set hot water supply temperature with the water from the bypass pipe 30 and the hot water. The mixing ratio with the hot water from the pipe 40 is calculated, and the mixing controller 50 is adjusted and controlled to have the mixing ratio (S1). During the hot water supply operation, an appropriate mixing ratio is ensured by performing a recalculation at regular time intervals and each time the set hot water supply temperature is changed.
In the above, when only the hot water supply operation is performed, the controller 70 can adjust the temperature of the hot water storage tank 14 to the set hot water supply temperature or a temperature slightly higher than the set hot water supply temperature. Of course, when the heating operation or the bath reheating operation is performed, the controller 70 controls the combustion of the oil burner 12 so as to maintain the hot water storage temperature of the hot water storage tank 14 at a constant temperature of 70 ° C. or more, for example, 80 ° C. Control.
[0011]
During a hot water supply operation or the like, if a failure occurs in which the mixing regulator 50 is stuck in a state where the hot water pipe 40 side passage is fully opened, the control by the controller 70 does not work, and the hot water from the hot water pipe 40 is discharged. Hot water will be supplied without being mixed. Therefore, in the present invention, when the mixing controller 50 is out of order while the mixing regulator 50 is in the fully opened state of the passage on the tapping pipe 40 side (Yes in S2), the controller 70 performs the above-mentioned operation in the heating operation and the bath reheating operation as a safe operation. The hot water storage temperature of the hot water storage tank 14 is changed and set to a constant temperature of 70 ° C. or higher in normal times, 80 ° C. in the embodiment, a constant temperature of 50 ° C. or lower below 60 ° C., and 60 ° C. in the embodiment (S3). It has a configuration. Further, a failure display of the mixing controller 50 is displayed on the display unit of the controller 70 or the display unit of the remote controller (S3).
In the above description, if the mixing controller 50 is out of order while the tapping pipe 40 side passage is fully open, the mixing controller 50 will not mix even if a mixing ratio adjustment command is issued from the controller 70 to the mixing controller 50. Since the ratio adjusting means, for example, the control valve or the like does not move from the fully opened position of the tapping pipe 40 side passage, this state is determined by the controller 70 via a limit switch or the like built in the mixing controller 50, and the hot water supply temperature sensor 61 It is determined from a change in the detected hot water supply temperature or the like, and as a result, it is determined that the mixing controller 50 is out of order when the outlet pipe 40 side passage is fully opened.
[0012]
【The invention's effect】
The present invention has the above configuration, and according to the hot water storage type hot water supply device according to claim 1, when the heating operation or the bath reheating operation is performed in normal times, the hot water storage temperature of the hot water storage tank is at least 70 ° C or more. If the mixing controller is controlled to maintain a constant high temperature and the mixing controller fails while the outlet pipe side passage is fully opened, the hot water storage temperature of the hot water storage tank in the heating operation or the bath reheating operation as a safe operation is 60 ° C. or less. Since a controller that changes the temperature to a constant temperature of 50 ° C or higher is provided, even if the mixing controller fails while the hot water pipe side passage is fully open, the bath reheating operation and heating operation may slightly decrease the heating efficiency. Can be continued. Moreover, even when the hot water supply operation is performed simultaneously during the bath reheating operation or the heating operation, the danger of the user being burned or the like can be sufficiently reduced because the hot water storage temperature itself is reduced. Of course, in normal times when the mixing controller is not out of order, it is possible to perform heating heating and bath reheating with a sufficiently high hot water storage temperature sufficiently effectively, and the water supply is sufficiently mixed by the normal mixing controller. Hot water having a predetermined set hot water supply temperature can be supplied.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a hot water supply type hot water supply apparatus according to an embodiment of the present invention.
FIG. 2 is a control flowchart by a controller.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Hot water storage can 12 Oil burner 14 Hot water storage tank 15 Heat exchange coil for heating 16 Heat exchange coil for bath reheating 20 Water inlet pipe 30 Bypass pipe 40 Hot water pipe 50 Mixing controller 70 Controller
