JP7182410B2

JP7182410B2 - bath equipment

Info

Publication number: JP7182410B2
Application number: JP2018177596A
Authority: JP
Inventors: 尚之北村; 宣彦柳瀬
Original assignee: Rinnai Corp
Current assignee: Rinnai Corp
Priority date: 2018-09-21
Filing date: 2018-09-21
Publication date: 2022-12-02
Anticipated expiration: 2038-09-21
Also published as: JP2020046166A

Description

本明細書で開示する技術は、風呂装置に関する。 The technology disclosed in this specification relates to a bath apparatus.

特許文献１には、水を加熱する熱源機と、前記熱源機で加熱された水を浴槽へ供給する湯はり経路と、前記浴槽に取り付けられており、前記湯はり経路からの水を前記浴槽の内部へ送り出すアダプタと、制御装置を備える風呂装置が開示されている。前記アダプタは、前記湯はり経路から水が流入する流入口と、前記浴槽の内部へ水が流出する流出口と、前記流入口から前記流出口へ水が流れる経路を開閉可能な遮断弁と、前記遮断弁を開く方向に付勢する弾性部材と、前記流出口の近傍に設けられており、前記遮断弁を閉じる方向に付勢する付勢機構を備えている。前記付勢機構の付勢力は、前記付勢機構の温度に応じて変化する。前記付勢機構の温度が所定温度に満たない場合に、前記付勢機構による付勢力は前記弾性部材による付勢力よりも小さくなる。前記付勢機構の温度が前記所定温度以上の場合に、前記付勢機構による付勢力は前記弾性部材による付勢力よりも大きくなる。前記制御装置は、前記熱源機で加熱された水を、前記浴槽へ供給する湯はり運転を実行可能である。この風呂装置では、湯はり運転の実行中に、所定温度以上の水がアダプタから浴槽へ供給されると、付勢機構の温度が所定温度以上となって、遮断弁が閉じられる。 Patent Document 1 discloses a heat source device that heats water, a hot water supply path that supplies the water heated by the heat source device to a bathtub, and a hot water supply path that is attached to the bathtub and supplies water from the hot water supply path to the bathtub. A bath apparatus is disclosed that includes an adapter for feeding into the interior of a bath and a controller. The adapter includes an inlet through which water flows from the hot water filling path, an outlet through which water flows out into the bathtub, and a shutoff valve capable of opening and closing a path through which water flows from the inlet to the outlet. An elastic member that biases the shutoff valve in the opening direction and a biasing mechanism that is provided near the outflow port and biases the shutoff valve in the closing direction are provided. The biasing force of the biasing mechanism changes according to the temperature of the biasing mechanism. When the temperature of the biasing mechanism is below a predetermined temperature, the biasing force of the biasing mechanism is smaller than the biasing force of the elastic member. When the temperature of the biasing mechanism is equal to or higher than the predetermined temperature, the biasing force of the biasing mechanism is greater than the biasing force of the elastic member. The control device is capable of executing a hot-water filling operation for supplying water heated by the heat source machine to the bathtub. In this bath apparatus, when water of a predetermined temperature or higher is supplied from the adapter to the bathtub during the hot-water filling operation, the temperature of the urging mechanism rises to a predetermined temperature or higher, closing the cutoff valve.

特開２０１６－２００３３２号公報JP 2016-200332 A

浴槽に上記のようなアダプタが取り付けられている場合、大流量の水が湯はり経路からアダプタを介して浴槽へ供給されると、アダプタの内部において、乱流に起因する水の圧力変動が生じる。この場合、アダプタから浴槽へ供給される水の温度が所定温度よりも低いために付勢機構の温度も所定温度より低く、付勢機構による付勢力が小さいにも関わらず、水の圧力変動によって弾性部材の付勢力に抗して遮断弁が閉じてしまうという異常な動作を生じることがある。その後、圧力変動が解消されて遮断弁が開いた後に湯はり運転を再開しても、再び大流量の水が湯はり経路からアダプタを介して浴槽へ供給されると、再び遮断弁が閉じてしまい、それを繰り返してしまう。その結果、湯はり運転が何度も中断され、湯はり運転が完了するまで長時間を要することになる。本明細書では、アダプタの異常な動作によって湯はり運転が中断されることを抑制することが可能な技術を提供する。 When the above adapter is attached to the bathtub, when a large flow of water is supplied to the bathtub from the hot water supply path via the adapter, pressure fluctuations in the water occur inside the adapter due to turbulence. . In this case, since the temperature of the water supplied from the adapter to the bathtub is lower than the predetermined temperature, the temperature of the biasing mechanism is also lower than the predetermined temperature. An abnormal operation may occur in which the shut-off valve closes against the biasing force of the elastic member. After that, even if the hot water filling operation is resumed after the pressure fluctuation is eliminated and the shutoff valve is opened, the shutoff valve is closed again when a large flow of water is again supplied to the bathtub from the hot water filling path via the adapter. I end up repeating it. As a result, the hot water filling operation is interrupted many times, and it takes a long time until the hot water filling operation is completed. The present specification provides a technique capable of suppressing interruption of the hot water filling operation due to an abnormal operation of the adapter.

本明細書が開示する風呂装置は、水を加熱する熱源機と、前記熱源機で加熱された水を浴槽へ供給する湯はり経路と、前記湯はり経路を開閉可能な湯はり弁と、前記湯はり経路を流れる水の流量を、予め設定された上限流量以下に制限可能な流量制限手段と、前記湯はり経路を流れる水の流量を検出する流量センサと、前記浴槽に取り付けられており、前記湯はり経路からの水を前記浴槽の内部へ送り出すアダプタと、制御装置を備えている。前記アダプタは、前記湯はり経路から水が流入する流入口と、前記浴槽の内部へ水が流出する流出口と、前記流入口から前記流出口へ水が流れる経路を開閉可能な遮断弁と、前記遮断弁を開く方向に付勢する弾性部材と、前記流出口の近傍に設けられており、前記遮断弁を閉じる方向に付勢する付勢機構を備えている。前記付勢機構の付勢力は、前記付勢機構の温度に応じて変化する。前記付勢機構の温度が所定温度に満たない場合に、前記付勢機構による付勢力が前記弾性部材による付勢力よりも小さくなる。前記付勢機構の温度が前記所定温度以上の場合に、前記付勢機構による付勢力が前記弾性部材による付勢力よりも大きくなる。前記制御装置は、前記熱源機で加熱された水を、前記浴槽へ供給する湯はり運転を実行可能である。前記制御装置は、前記湯はり運転を開始すると、前記湯はり弁を開く。前記制御装置は、前記湯はり運転を開始した後、前記浴槽へ湯はり設定量の水が供給されると、前記湯はり弁を閉じて前記湯はり運転を終了する。前記制御装置は、前記湯はり運転の実行中に、前記湯はり経路を流れる水の流量が所定流量以下となった場合に、前記湯はり弁を閉じて前記湯はり運転を中断し、その後に前記湯はり弁を開いて前記湯はり運転を再開する。前記制御装置は、前記湯はり運転の実行中に、前記湯はり運転を中断した後、前記湯はり運転を再開してから前記流量センサで検出される流量が所定流量以上となるまでの経過時間が所定時間に満たない場合に、前記上限流量を低減させる。 A bath apparatus disclosed in the present specification comprises a heat source machine for heating water, a hot water supply path for supplying water heated by the heat source machine to a bathtub, a hot water supply valve capable of opening and closing the hot water supply path, and a flow rate limiting means capable of limiting the flow rate of water flowing through the hot water filling path to a preset upper limit flow rate or less; a flow rate sensor detecting the flow rate of the water flowing through the hot water filling path; An adapter for sending water from the hot water supply path to the inside of the bathtub and a control device are provided. The adapter includes an inlet through which water flows from the hot water filling path, an outlet through which water flows out into the bathtub, and a shutoff valve capable of opening and closing a path through which water flows from the inlet to the outlet. An elastic member that biases the shutoff valve in the opening direction and a biasing mechanism that is provided near the outflow port and biases the shutoff valve in the closing direction are provided. The biasing force of the biasing mechanism changes according to the temperature of the biasing mechanism. When the temperature of the biasing mechanism is below a predetermined temperature, the biasing force of the biasing mechanism is smaller than the biasing force of the elastic member. When the temperature of the biasing mechanism is equal to or higher than the predetermined temperature, the biasing force of the biasing mechanism is greater than the biasing force of the elastic member. The control device is capable of executing a hot-water filling operation for supplying water heated by the heat source machine to the bathtub. The control device opens the hot water filling valve when the hot water filling operation is started. After starting the hot water filling operation, the control device closes the hot water filling valve and ends the hot water filling operation when a set amount of water is supplied to the bathtub. The control device closes the hot water filling valve to interrupt the hot water filling operation when the flow rate of water flowing through the hot water filling path falls below a predetermined flow rate during execution of the hot water filling operation, and then The hot water filling valve is opened to restart the hot water filling operation. During the execution of the hot water filling operation, the control device controls, after the hot water filling operation is interrupted, the elapsed time from when the hot water filling operation is resumed until the flow rate detected by the flow sensor becomes equal to or greater than a predetermined flow rate. is less than the predetermined time, the upper limit flow rate is reduced.

大流量の水が流れることに起因するアダプタの異常な動作によって遮断弁が閉じられた場合は、アダプタの内部で水が流れなくなると、乱流に起因する水の圧力変動が消失し、アダプタの異常な動作は速やかに解消されて、遮断弁が再び開かれる。このため、湯はり運転を中断した後、再び湯はり運転を開始してから流量センサで検出される流量が所定流量以上となるまでの経過時間が所定時間に満たない場合には、大流量の水が流れることに起因するアダプタの異常な動作によって遮断弁が閉じられた可能性が高い。上記の風呂装置では、湯はり運転において、大流量の水が湯はり経路からアダプタを介して浴槽へ供給されて、アダプタの異常な動作により遮断弁が閉じられると、その後の湯はり運転における上限流量を低減させる。このような構成とすることによって、大流量の水が流れることに起因して生じるアダプタ内部における水の圧力変動を抑制し、アダプタが異常な動作をすることを抑制することができる。アダプタの異常な動作によって湯はり運転が中断されることを抑制することができる。 If the shutoff valve is closed due to abnormal operation of the adapter caused by a large flow of water, when the water stops flowing inside the adapter, the water pressure fluctuation caused by turbulence disappears and the adapter Abnormal operation is quickly rectified and the isolation valve is reopened. For this reason, if the elapsed time from when the hot water filling operation is restarted after the hot water filling operation is interrupted until the flow rate detected by the flow rate sensor reaches or exceeds the predetermined flow rate is less than the predetermined time, a large flow rate may occur. It is likely that the isolation valve was closed due to abnormal operation of the adapter due to water flow. In the above bath apparatus, when a large flow of water is supplied from the hot water filling path to the bathtub through the adapter during the hot water filling operation, and the shutoff valve is closed due to the abnormal operation of the adapter, the upper limit of the hot water filling operation after that is reached. Reduce flow. By adopting such a configuration, it is possible to suppress the pressure fluctuation of the water inside the adapter caused by the flow of a large amount of water, and to suppress the adapter from operating abnormally. It is possible to suppress the interruption of the hot water filling operation due to the abnormal operation of the adapter.

本明細書が開示する別の風呂装置は、水を加熱する熱源機と、前記熱源機で加熱された水を浴槽へ供給する湯はり経路と、前記湯はり経路を開閉可能な湯はり弁と、前記湯はり経路を流れる水の流量を、予め設定された上限流量以下に制限可能な流量制限手段と、前記湯はり経路を流れる水の流量を検出する流量センサと、前記湯はり経路を流れる水の温度を検出する温度センサと、前記浴槽に取り付けられており、前記湯はり経路からの水を前記浴槽の内部へ送り出すアダプタと、制御装置を備えている。前記アダプタは、前記湯はり経路から水が流入する流入口と、前記浴槽の内部へ水が流出する流出口と、前記流入口から前記流出口へ水が流れる経路を開閉可能な遮断弁と、前記遮断弁を開く方向に付勢する弾性部材と、前記流出口の近傍に設けられており、前記遮断弁を閉じる方向に付勢する付勢機構を備えている。前記付勢機構の付勢力は、前記付勢機構の温度に応じて変化する。前記付勢機構の温度が所定温度に満たない場合に、前記付勢機構による付勢力が前記弾性部材による付勢力よりも小さくなる。前記付勢機構の温度が前記所定温度以上の場合に、前記付勢機構による付勢力が前記弾性部材による付勢力よりも大きくなる。前記制御装置は、前記熱源機で加熱された水を、前記浴槽へ供給する湯はり運転を実行可能である。前記制御装置は、前記湯はり運転を開始すると、前記湯はり弁を開く。前記制御装置は、前記湯はり運転を開始した後、前記浴槽へ湯はり設定量の水が供給されると、前記湯はり弁を閉じて前記湯はり運転を終了する。前記制御装置は、前記湯はり運転の実行中に、前記湯はり経路を流れる水の流量が所定流量以下となった場合に、前記湯はり弁を閉じて前記湯はり運転を中断し、その後に前記湯はり弁を開いて前記湯はり運転を再開する。前記制御装置は、前記湯はり運転の実行中に、前記湯はり運転を中断し、かつ前記湯はり運転を中断した時点において前記温度センサで検出される温度が前記所定温度に満たない場合に、前記上限流量を低減させる。Another bath apparatus disclosed in this specification includes a heat source machine that heats water, a hot water supply path that supplies the water heated by the heat source machine to a bathtub, and a hot water supply valve that can open and close the hot water supply path. a flow rate limiting means capable of limiting the flow rate of the water flowing through the hot water filling path to a preset upper limit flow rate or less; a flow rate sensor detecting the flow rate of the water flowing through the hot water filling path; It comprises a temperature sensor for detecting the temperature of water, an adapter attached to the bathtub for sending water from the hot water supply path into the bathtub, and a controller. The adapter includes an inlet through which water flows from the hot water filling path, an outlet through which water flows out into the bathtub, and a shutoff valve capable of opening and closing a path through which water flows from the inlet to the outlet. An elastic member that biases the shutoff valve in the opening direction and a biasing mechanism that is provided near the outflow port and biases the shutoff valve in the closing direction are provided. The biasing force of the biasing mechanism changes according to the temperature of the biasing mechanism. When the temperature of the biasing mechanism is below a predetermined temperature, the biasing force of the biasing mechanism is smaller than the biasing force of the elastic member. When the temperature of the biasing mechanism is equal to or higher than the predetermined temperature, the biasing force of the biasing mechanism is greater than the biasing force of the elastic member. The control device is capable of executing a hot-water filling operation for supplying water heated by the heat source machine to the bathtub. The control device opens the hot water filling valve when the hot water filling operation is started. After starting the hot water filling operation, the control device closes the hot water filling valve and ends the hot water filling operation when a set amount of water is supplied to the bathtub. The control device closes the hot water filling valve to interrupt the hot water filling operation when the flow rate of water flowing through the hot water filling path falls below a predetermined flow rate during execution of the hot water filling operation, and then The hot water filling valve is opened to restart the hot water filling operation. The control device interrupts the hot water filling operation during execution of the hot water filling operation, and if the temperature detected by the temperature sensor at the time when the hot water filling operation is interrupted is less than the predetermined temperature, reducing the upper limit flow rate;

湯はり経路からアダプタに供給される水の温度が所定温度以上の状態で、遮断弁が閉じた場合には、アダプタが正常な動作をしているものと考えられるが、湯はり経路からアダプタに供給される水の温度が所定温度に満たない状態で、遮断弁が閉じた場合には、アダプタが異常な動作をしているものと考えられる。このため、湯はり運転の実行中に、湯はり運転を中断し、かつ湯はり運転を中断した時点において温度センサで検出される温度が所定温度に満たない場合には、大流量の水が流れることに起因するアダプタの異常な動作によって遮断弁が閉じられた可能性が高い。上記の風呂装置では、湯はり運転において、大流量の水が湯はり経路からアダプタを介して浴槽へ供給されて、アダプタの異常な動作により遮断弁が閉じられると、その後の湯はり運転における上限流量を低減させる。このような構成とすることによって、大流量の水が流れることに起因して生じるアダプタ内部における水の圧力変動を抑制し、アダプタが異常な動作をすることを抑制することができる。アダプタの異常な動作によって湯はり運転が中断されることを抑制することができる。If the shutoff valve is closed while the temperature of the water supplied from the hot water supply path to the adapter is above a predetermined temperature, the adapter is considered to be operating normally. If the cutoff valve is closed while the temperature of the supplied water is lower than the predetermined temperature, it is considered that the adapter is operating abnormally. Therefore, if the hot water filling operation is interrupted during execution of the hot water filling operation and the temperature detected by the temperature sensor at the time when the hot water filling operation is interrupted is less than the predetermined temperature, a large amount of water flows. It is highly probable that the shutoff valve was closed due to the abnormal operation of the adapter caused by this. In the above bath apparatus, when a large flow of water is supplied from the hot water filling path to the bathtub through the adapter during the hot water filling operation, and the shutoff valve is closed due to the abnormal operation of the adapter, the upper limit of the hot water filling operation after that is reached. Reduce flow. By adopting such a configuration, it is possible to suppress the pressure fluctuation of the water inside the adapter caused by the flow of a large amount of water, and to suppress the adapter from operating abnormally. It is possible to suppress the interruption of the hot water filling operation due to the abnormal operation of the adapter.

実施例に係る風呂給湯装置２の構成を模式的に示す。1 schematically shows the configuration of a bath water heater 2 according to an embodiment. 実施例に係る風呂給湯装置２のアダプタ３２の構成を示す断面図である。Fig. 3 is a cross-sectional view showing the configuration of an adapter 32 of the bath water heater 2 according to the embodiment; 実施例に係る風呂給湯装置２の制御装置４６が実行する処理の例を示すフローチャートである。4 is a flowchart showing an example of processing executed by the control device 46 of the bath water heater 2 according to the embodiment; 実施例に係る風呂給湯装置２の制御装置４６が実行する処理の例を示すフローチャートである。4 is a flowchart showing an example of processing executed by the control device 46 of the bath water heater 2 according to the embodiment;

（実施例）
図１に示すように、本実施例の風呂給湯装置２は、上水道４から供給される低温の水を加熱して、浴槽６や、水栓８（例えばシャワーやカラン等）へ、高温の水を供給する。 (Example)
As shown in FIG. 1, the bath water heater 2 of this embodiment heats low-temperature water supplied from a tap water supply 4, and supplies hot water to a bathtub 6 or a faucet 8 (for example, a shower or a faucet). supply.

給水経路１０の上流端は、上水道４に接続されている。給水経路１０には、流量センサ１２が設けられている。流量センサ１２は、給水経路１０を流れる水の流量を検出する。給水経路１０の下流端には、加熱経路１４の上流端と、第１バイパス経路１６の上流端が接続している。 An upstream end of the water supply route 10 is connected to the water supply 4 . A flow rate sensor 12 is provided in the water supply path 10 . The flow rate sensor 12 detects the flow rate of water flowing through the water supply path 10 . The upstream end of the heating path 14 and the upstream end of the first bypass path 16 are connected to the downstream end of the water supply path 10 .

加熱経路１４には、熱源機１８が介装されている。熱源機１８は、例えば、都市ガス等の燃料を燃焼させた燃焼熱によって水を加熱する燃焼熱源機である。加熱経路１４の下流端は、給湯経路２０の上流端に接続されている。 A heat source device 18 is interposed in the heating path 14 . The heat source device 18 is, for example, a combustion heat source device that heats water with combustion heat obtained by burning fuel such as city gas. The downstream end of heating path 14 is connected to the upstream end of hot water supply path 20 .

第１バイパス経路１６には、第１バイパス電磁弁２２が設けられている。第１バイパス電磁弁２２は、第１バイパス経路１６を開閉する。第１バイパス経路１６の下流端は、給湯経路２０の上流端に接続されている。なお、本実施例の風呂給湯装置２では、給水経路１０から加熱経路１４および第１バイパス経路１６に流れる水の流量と、加熱経路１４および第１バイパス経路１６から給湯経路２０に流れる水の流量は等しい。従って、給湯経路２０を流れる水の流量は、流量センサ１２によって検出される水の流量に一致する。 A first bypass solenoid valve 22 is provided in the first bypass path 16 . The first bypass solenoid valve 22 opens and closes the first bypass path 16 . A downstream end of the first bypass route 16 is connected to an upstream end of the hot water supply route 20 . In the bath water heater 2 of this embodiment, the flow rate of water flowing from the water supply path 10 to the heating path 14 and the first bypass path 16 and the flow rate of water flowing from the heating path 14 and the first bypass path 16 to the hot water supply path 20 are equal. Therefore, the flow rate of water flowing through hot water supply path 20 matches the flow rate of water detected by flow sensor 12 .

給湯経路２０には、出湯サーミスタ２４と、出湯サーボ弁２６が設けられている。出湯サーミスタ２４は、給湯経路２０を流れる水の温度を検出する。出湯サーボ弁２６は、給湯経路２０の開度を調整することで、給湯経路２０を流れる水の流量を制御する。給湯経路２０の下流端には、第１出湯経路２８の上流端と、第２出湯経路３０の上流端が接続されている。 The hot water supply path 20 is provided with a hot water outlet thermistor 24 and a hot water outlet servo valve 26 . Hot water thermistor 24 detects the temperature of water flowing through hot water supply path 20 . Hot water supply servo valve 26 controls the flow rate of water flowing through hot water supply path 20 by adjusting the degree of opening of hot water supply path 20 . The upstream end of the first hot water outlet path 28 and the upstream end of the second hot water outlet path 30 are connected to the downstream end of the hot water supply path 20 .

第１出湯経路２８の下流端は、浴槽６の内側に設けられたアダプタ３２に接続されている。第１出湯経路２８を流れる水は、アダプタ３２を介して浴槽６に供給される。第１出湯経路２８には、湯はり電磁弁３４、第１逆止弁３６が設けられている。湯はり電磁弁３４は、第１出湯経路２８を開閉する。第１逆止弁３６は、第１出湯経路２８において、水が逆流することを防止する。 A downstream end of the first hot water outlet path 28 is connected to an adapter 32 provided inside the bathtub 6 . Water flowing through first hot water outlet path 28 is supplied to bathtub 6 via adapter 32 . A hot water filling solenoid valve 34 and a first check valve 36 are provided in the first hot water outlet path 28 . The hot water filling solenoid valve 34 opens and closes the first hot water outlet path 28 . The first check valve 36 prevents reverse flow of water in the first hot water outlet path 28 .

第２出湯経路３０の下流端は、水栓８に接続されている。第２出湯経路３０を流れる水は、水栓８に供給される。第２出湯経路３０には、第２逆止弁３８が設けられている。第２逆止弁３８は、第２出湯経路３０において、水が逆流することを防止する。 A downstream end of the second hot water outlet path 30 is connected to the faucet 8 . Water flowing through the second hot water outlet path 30 is supplied to the faucet 8 . A second check valve 38 is provided in the second hot water outlet path 30 . The second check valve 38 prevents reverse flow of water in the second hot water outlet path 30 .

第２出湯経路３０の第２逆止弁３８より下流側と、給水経路１０の流量センサ１２より上流側は、第２バイパス経路４０を介して接続されている。第２バイパス経路４０には、第２バイパス電磁弁４２と、水流スイッチ４４が設けられている。第２バイパス電磁弁４２は、第２バイパス経路４０を開閉する。水流スイッチ４４は、第２バイパス経路４０における水流の有無を検知する。 The downstream side of the second hot water outlet path 30 from the second check valve 38 and the upstream side of the water supply path 10 from the flow rate sensor 12 are connected via a second bypass path 40 . A second bypass solenoid valve 42 and a water flow switch 44 are provided in the second bypass path 40 . The second bypass electromagnetic valve 42 opens and closes the second bypass path 40 . The water flow switch 44 detects the presence or absence of water flow in the second bypass route 40 .

制御装置４６は、流量センサ１２、出湯サーミスタ２４、水流スイッチ４４からの検出信号を受信する。制御装置４６は、熱源機１８、第１バイパス電磁弁２２、出湯サーボ弁２６、湯はり電磁弁３４、第２バイパス電磁弁４２に制御信号を送信して、これらの動作を制御する。 The controller 46 receives detection signals from the flow rate sensor 12 , hot water outlet thermistor 24 and water flow switch 44 . The control device 46 transmits control signals to the heat source machine 18, the first bypass solenoid valve 22, the hot water supply servo valve 26, the hot water filling solenoid valve 34, and the second bypass solenoid valve 42 to control their operations.

制御装置４６は、通常時は、第１バイパス電磁弁２２を開いている。この場合、給水経路１０を流れる水の一部は加熱経路１４を介して給湯経路２０へ送られ、残りは第１バイパス経路１６を介して給湯経路２０へ送られる。このため、加熱経路１４によって水を加熱している場合、給湯経路２０において、加熱経路１４からの高温の水と、第１バイパス経路１６からの低温の水が混合されて、温度調整された水が第１出湯経路２８や第２出湯経路３０に送られる。なお、浴槽６や水栓８に所定温度（例えば６０℃）以上の高温の水を供給する場合には、制御装置４６は、第１バイパス電磁弁２２を閉じる。この場合、給水経路１０を流れる水の全量が加熱経路１４を介して給湯経路２０へ送られる。このため、給湯経路２０には、加熱経路１４からの高温の水がそのまま供給され、高温の水が第１出湯経路２８や第２出湯経路３０に送られる。 The control device 46 normally opens the first bypass solenoid valve 22 . In this case, part of the water flowing through the water supply path 10 is sent to the hot water supply path 20 via the heating path 14 and the rest is sent to the hot water supply path 20 via the first bypass path 16 . Therefore, when water is heated by the heating path 14, in the hot water supply path 20, the high temperature water from the heating path 14 and the low temperature water from the first bypass path 16 are mixed to adjust the temperature of the water. is sent to the first hot water outlet path 28 and the second hot water outlet path 30 . Note that the control device 46 closes the first bypass solenoid valve 22 when supplying hot water of a predetermined temperature (for example, 60° C.) or higher to the bathtub 6 or the faucet 8 . In this case, the entire amount of water flowing through water supply path 10 is sent to hot water supply path 20 via heating path 14 . Therefore, the hot water supply path 20 is supplied with the high temperature water from the heating path 14 as it is, and the high temperature water is sent to the first hot water outlet path 28 and the second hot water outlet path 30 .

制御装置４６は、通常時は、第２バイパス電磁弁４２を閉じており、後述する湯はり運転を実行する際には、第２バイパス電磁弁４２を開く。この場合、湯はり運転の実行中に水栓８が開かれると、第２バイパス経路４０に水流が生じて、水流スイッチ４４がオンになる。制御装置４６は、湯はり運転の実行中に水流スイッチ４４がオンになると、水栓８への水の供給を優先して、湯はり電磁弁３４を閉じて湯はり運転を中断するとともに、第２バイパス電磁弁４２を閉じる。 The control device 46 normally closes the second bypass solenoid valve 42, and opens the second bypass solenoid valve 42 when performing a hot water filling operation, which will be described later. In this case, when the faucet 8 is opened during execution of the hot water filling operation, a water flow is generated in the second bypass path 40 and the water flow switch 44 is turned on. When the water flow switch 44 is turned on during the hot water filling operation, the control device 46 gives priority to the supply of water to the faucet 8, closes the hot water filling solenoid valve 34, and interrupts the hot water filling operation. 2 Bypass solenoid valve 42 is closed.

図２はアダプタ３２の内部の構造を示している。アダプタ３２は、全体がドーム形状のケーシング４８によって覆われている。ケーシング４８の下部の側面には、複数の流出口５０が形成されている。ケーシング４８の内部には、第１出湯経路２８から水が供給される流入口５２と、流入口５２から供給される水を流出口５０へ送り出すノズル５４と、ノズル５４の上流側を開閉可能な遮断弁５６と、遮断弁５６を開く方向に付勢する圧縮バネ５８と、遮断弁５６を閉じる方向に付勢する感温バネ６０が設けられている。 FIG. 2 shows the internal structure of the adapter 32. As shown in FIG. The adapter 32 is entirely covered by a dome-shaped casing 48 . A plurality of outflow ports 50 are formed in the lower side surface of the casing 48 . Inside the casing 48, there are provided an inlet 52 to which water is supplied from the first hot water discharge path 28, a nozzle 54 for sending the water supplied from the inlet 52 to the outlet 50, and an upstream side of the nozzle 54 that can be opened and closed. A shut-off valve 56, a compression spring 58 that biases the shut-off valve 56 in the opening direction, and a temperature sensing spring 60 that biases the shut-off valve 56 in the closing direction are provided.

感温バネ６０は、例えば形状記憶合金製のバネである。感温バネ６０は、低温時には、遮断弁５６を閉じる方向に付勢する力が弱くなり、高温時には、遮断弁５６を閉じる方向に付勢する力が強くなるように構成されている。アダプタ３２では、感温バネ６０の温度が所定温度（例えば６０℃）より低い場合には、圧縮バネ５８の付勢力が感温バネ６０の付勢力よりも強く、遮断弁５６は開かれている。感温バネ６０の温度が所定温度（例えば６０℃）以上となると、感温バネ６０の付勢力が圧縮バネ５８の付勢力よりも強くなり、遮断弁５６が閉じられる。このように、アダプタ３２の遮断弁５６は、感温バネ６０の温度に応じて自動的に開閉する。 The temperature sensitive spring 60 is, for example, a shape memory alloy spring. The temperature-sensing spring 60 is configured such that when the temperature is low, the force to close the shutoff valve 56 is weak, and when the temperature is high, the force to close the shutoff valve 56 is strong. In the adapter 32, when the temperature of the temperature-sensitive spring 60 is lower than a predetermined temperature (for example, 60° C.), the biasing force of the compression spring 58 is stronger than the biasing force of the temperature-sensitive spring 60, and the cutoff valve 56 is opened. . When the temperature of the temperature-sensitive spring 60 reaches or exceeds a predetermined temperature (for example, 60° C.), the biasing force of the temperature-sensitive spring 60 becomes stronger than the biasing force of the compression spring 58, and the cutoff valve 56 is closed. Thus, the shutoff valve 56 of the adapter 32 automatically opens and closes according to the temperature of the temperature sensitive spring 60 .

このようなアダプタ３２を備える風呂装置３２において、湯はり運転を実行して浴槽６に水を供給する際、供給する水が所定温度以上の高温の場合、例えば、浴槽６内の水温を上昇させるために実行する差し湯を行う場合、浴槽６内にアダプタ３２を覆う以上の水位まで水がある場合には、感温バネ６０の温度は所定温度以上まで上昇しないため、遮断弁５６は閉じられない。一方、浴槽６内に水が無い場合には、ノズル５４から流出口５０へ送り出される水が、ケーシング４８の内面等で跳ね返り感温バネ６０に接触することにより、感温バネ６０の温度が所定温度以上となり、遮断弁５６が閉じられ、浴槽６内への高温の水の供給を停止する。これによって、浴槽６内の水が所定温度以上となることを防止し、使用者の安全性を確保することができる。 In the bath apparatus 32 having such an adapter 32, when water is supplied to the bathtub 6 by executing the hot water filling operation, if the temperature of the supplied water is higher than a predetermined temperature, the temperature of the water in the bathtub 6 is raised, for example. When the hot water is added to the bathtub 6, if the water level in the bathtub 6 is higher than the water level covering the adapter 32, the temperature of the temperature sensing spring 60 does not rise to a predetermined temperature or higher, so the shutoff valve 56 is closed. do not have. On the other hand, when there is no water in the bathtub 6, the water sent from the nozzle 54 to the outflow port 50 rebounds on the inner surface of the casing 48 or the like and contacts the temperature sensing spring 60, so that the temperature of the temperature sensing spring 60 rises to a predetermined value. When the temperature rises above the temperature, the cutoff valve 56 is closed and the supply of high temperature water into the bathtub 6 is stopped. As a result, it is possible to prevent the water in the bathtub 6 from reaching a predetermined temperature or higher, thereby ensuring the safety of the user.

上記のような構成のアダプタ３２においては、アダプタ３２に供給される水の流量が大きい（例えば、２３Ｌ／分以上）と、アダプタ３２の内部に乱流が生じて、感温バネ６０の温度が低いにも関わらず、水の圧力変動によって遮断弁５６が閉じてしまうことがある。このような遮断弁５６の誤作動が生じると、アダプタ３２には高温の水は供給されておらず、安全性に問題がないにも関わらず、湯はり運転が中断されてしまい、利便性を損なってしまう。そこで、本実施例の風呂給湯装置２では、遮断弁５６に誤作動が生じた場合には、その後に行う湯はり運転において同様の誤作動を生じないように、アダプタ３２に供給される水の流量を低減させる。 In the adapter 32 configured as described above, when the flow rate of water supplied to the adapter 32 is large (for example, 23 L/min or more), turbulent flow occurs inside the adapter 32, and the temperature of the temperature sensing spring 60 rises. Despite being low, pressure fluctuations in the water can cause the isolation valve 56 to close. If such a malfunction of the shutoff valve 56 occurs, hot water is not supplied to the adapter 32 and there is no safety problem, but the hot water filling operation is interrupted, resulting in a loss of convenience. I will lose. Therefore, in the bath hot water supply apparatus 2 of this embodiment, when a malfunction occurs in the cutoff valve 56, the water supplied to the adapter 32 is controlled so as not to cause a similar malfunction in the subsequent hot water filling operation. Reduce flow.

図３、図４は、本実施例の風呂給湯装置２の湯はり運転の際に制御装置４６が行う処理を示している。 3 and 4 show the processing performed by the control device 46 during the hot water filling operation of the bath water heater 2 of this embodiment.

Ｓ２では、制御装置４６は、湯はり電磁弁３４を開く。制御装置４６は、湯はり電磁弁３４を開くと、その後に湯はり電磁弁３４が閉じられるまで、給湯経路２０を流れる水の流量が予め設定された湯はり最大流量Ｗｍａｘ以下となるように、出湯サーボ弁２６を制御する。最初、湯はり最大流量Ｗｍａｘは、例えば２４Ｌ／分に設定されている。 At S2 , the controller 46 opens the hot water filling solenoid valve 34 . When the hot water filling solenoid valve 34 is opened, the control device 46 controls the flow rate of the water flowing through the hot water supply path 20 until the hot water filling solenoid valve 34 is closed after that, so that the flow rate of the water flowing through the hot water supply path 20 is equal to or less than the preset maximum hot water filling flow rate Wmax. It controls the hot water supply servo valve 26 . Initially, the hot water filling maximum flow rate Wmax is set to, for example, 24 L/min.

Ｓ４では、制御装置４６は、流量センサ１２で検出される流量Ｗが所定の点火水量（例えば３Ｌ／分）以上であるか否かを判断する。流量Ｗが点火水量に満たない場合（ＮＯの場合）、処理はＳ６へ進む。 In S4, the control device 46 determines whether or not the flow rate W detected by the flow rate sensor 12 is equal to or greater than a predetermined amount of ignition water (eg, 3 L/min). If the flow rate W is less than the ignition water amount (NO), the process proceeds to S6.

Ｓ６では、制御装置４６は、Ｓ２で湯はり電磁弁３４を開いてから、所定時間（例えば６０秒）が経過したか否かを判断する。所定時間が経過していない場合（ＮＯの場合）、処理はＳ４へ戻る。所定時間が経過している場合（ＹＥＳの場合）、処理はＳ８へ進む。 In S6, the control device 46 determines whether or not a predetermined time (for example, 60 seconds) has elapsed since the hot water filling solenoid valve 34 was opened in S2. If the predetermined time has not elapsed (NO), the process returns to S4. If the predetermined time has passed (if YES), the process proceeds to S8.

Ｓ８では、制御装置４６は、湯はり電磁弁３４を閉じる。 In S8 , the controller 46 closes the hot water filling solenoid valve 34 .

Ｓ１０では、制御装置４６は、使用者にエラーを報知して、湯はり運転を終了する。 In S10, the controller 46 notifies the user of the error and terminates the hot water filling operation.

Ｓ４で流量Ｗが点火水量以上の場合（ＹＥＳの場合）、処理はＳ１２へ進む。Ｓ１２では、制御装置４６は、熱源機１８での燃焼を開始し、熱源機１８による水の加熱を開始する。 If the flow rate W is greater than or equal to the ignition water amount in S4 (YES), the process proceeds to S12. In S12 , the control device 46 starts combustion in the heat source device 18 and starts heating water by the heat source device 18 .

Ｓ１４では、制御装置４６は、流量センサ１２で検出される流量Ｗが所定の消火水量（例えば２Ｌ／分）以下であるか否かを判断する。流量Ｗが消火水量を超えている場合（ＮＯの場合）、処理はＳ１６へ進む。 In S14, the control device 46 determines whether or not the flow rate W detected by the flow rate sensor 12 is equal to or less than a predetermined amount of fire extinguishing water (for example, 2 L/min). If the flow rate W exceeds the fire extinguishing water amount (NO), the process proceeds to S16.

Ｓ１６では、制御装置４６は、湯はり運転を開始してから浴槽６に供給した総水量（総湯はり量ともいう）が、所定の湯はり設定量（例えば２００Ｌ）以上であるか否かを判断する。総湯はり量は、例えば、流量センサ１２で検出される水の流量を、湯はり運転の開始時点から積算していくことによって、取得することができる。総湯はり量が湯はり設定量に満たない場合（ＮＯの場合）、処理はＳ１４へ戻る。総湯はり量が湯はり設定量以上の場合（ＹＥＳの場合）、処理はＳ１８へ進む。 In S16, the control device 46 determines whether or not the total amount of water supplied to the bathtub 6 after the start of the hot water filling operation (also referred to as total hot water filling amount) is equal to or greater than a predetermined hot water filling set amount (for example, 200 L). to decide. The total hot water filling amount can be obtained, for example, by integrating the flow rate of water detected by the flow sensor 12 from the start of the hot water filling operation. If the total hot water filling amount is less than the hot water filling set amount (in the case of NO), the process returns to S14. If the total hot water filling amount is greater than or equal to the hot water filling set amount (if YES), the process proceeds to S18.

Ｓ１８では、制御装置４６は、湯はり電磁弁３４を閉じる。 At S18 , the controller 46 closes the hot water filling solenoid valve 34 .

Ｓ２０では、制御装置４６は、熱源機１８での燃焼を停止して、熱源機１８による水の加熱を停止する。Ｓ２０の後、湯はり運転は終了する。 In S20 , the control device 46 stops combustion in the heat source device 18 and stops heating water by the heat source device 18 . After S20, the hot water filling operation ends.

Ｓ１４で流量Ｗが消火水量以下の場合（ＹＥＳの場合）、処理はＳ２２へ進む。Ｓ２２では、制御装置４６は、湯はり電磁弁３４を閉じる。 If the flow rate W is equal to or less than the amount of fire extinguishing water in S14 (in the case of YES), the process proceeds to S22. At S22 , the controller 46 closes the hot water filling solenoid valve 34 .

Ｓ２４では、制御装置４６は、熱源機１８での燃焼を停止して、熱源機１８による水の加熱を停止する。 In S24 , the control device 46 stops combustion in the heat source device 18 and stops heating water by the heat source device 18 .

図４のＳ２６では、制御装置４６は、出湯サーミスタ２４で検出される出湯温度Ｔｈが所定温度（例えば６０℃）を下回るか否かを判断する。出湯温度Ｔｈが所定温度以上の場合（ＮＯの場合）、処理はＳ２へ戻る。出湯温度Ｔｈが所定温度を下回る場合（ＹＥＳの場合）、処理はＳ２８へ進む。 In S26 of FIG. 4, the control device 46 determines whether or not the outlet heated water temperature Th detected by the outlet heated water thermistor 24 is lower than a predetermined temperature (for example, 60° C.). If the outlet hot water temperature Th is equal to or higher than the predetermined temperature (NO), the process returns to S2. If the outlet heated water temperature Th is lower than the predetermined temperature (if YES), the process proceeds to S28.

Ｓ２８では、制御装置４６は、Ｓ２で湯はり電磁弁３４を開いてからの経過時間Ｔ１が第１所定時間（例えば３０秒）未満であるか否かを判断する。経過時間Ｔ１が第１所定時間以上の場合（ＮＯの場合）、処理はＳ２へ戻る。経過時間Ｔ１が第１所定時間未満の場合（ＹＥＳの場合）、処理はＳ３０へ進む。 In S28, the control device 46 determines whether or not the elapsed time T1 after opening the hot water filling solenoid valve 34 in S2 is less than a first predetermined time (for example, 30 seconds). If the elapsed time T1 is equal to or longer than the first predetermined time (NO), the process returns to S2. If the elapsed time T1 is less than the first predetermined time (YES), the process proceeds to S30.

Ｓ３０では、制御装置４６は、湯はり電磁弁３４を開く。 In S30 , the controller 46 opens the hot water filling solenoid valve 34 .

Ｓ３２では、制御装置４６は、流量センサ１２で検出される流量Ｗが所定の点火水量以上であるか否かを判断する。流量Ｗが点火水量に満たない場合（ＮＯの場合）、処理はＳ３４へ進む。 In S32, the control device 46 determines whether or not the flow rate W detected by the flow rate sensor 12 is equal to or greater than a predetermined amount of ignition water. If the flow rate W is less than the ignition water amount (NO), the process proceeds to S34.

Ｓ３４では、制御装置４６は、Ｓ３０で湯はり電磁弁３４を開いてから、所定時間が経過したか否かを判断する。所定時間が経過していない場合（ＮＯの場合）、処理はＳ３２へ戻る。所定時間が経過している場合（ＹＥＳの場合）、処理はＳ３６へ進む。 In S34, the control device 46 determines whether or not a predetermined time has passed since the hot water filling solenoid valve 34 was opened in S30. If the predetermined time has not elapsed (NO), the process returns to S32. If the predetermined time has passed (YES), the process proceeds to S36.

Ｓ３６では、制御装置４６は、湯はり電磁弁３４を閉じる。 In S36 , the controller 46 closes the hot water filling solenoid valve 34 .

Ｓ３８では、制御装置４６は、使用者にエラーを報知して、湯はり運転を終了する。 At S38, the controller 46 notifies the user of the error and terminates the hot water filling operation.

Ｓ３２で流量Ｗが点火水量以上の場合（ＹＥＳの場合）、処理はＳ４０へ進む。Ｓ４０では、制御装置４６は、熱源機１８での燃焼を開始し、熱源機１８による水の加熱を開始する。 If the flow rate W is greater than or equal to the ignition water amount in S32 (YES), the process proceeds to S40. In S40 , the control device 46 starts combustion in the heat source device 18 and starts heating water by the heat source device 18 .

Ｓ４２では、制御装置４６は、Ｓ３０で湯はり電磁弁３４を開いてからの経過時間Ｔ２が第２所定時間（例えば５秒）未満であるか否かを判断する。経過時間Ｔ２が第２所定時間以上の場合（ＮＯの場合）、処理はＳ１４へ戻る。経過時間Ｔ２が第２所定時間未満の場合（ＹＥＳの場合）、処理はＳ４４へ進む。 In S42, the control device 46 determines whether or not the elapsed time T2 after opening the hot water filling solenoid valve 34 in S30 is less than a second predetermined time (for example, 5 seconds). If the elapsed time T2 is equal to or longer than the second predetermined time (NO), the process returns to S14. If the elapsed time T2 is less than the second predetermined time (YES), the process proceeds to S44.

Ｓ４４では、制御装置４６は、カウントＮを１増加させる。 In S44, the controller 46 increments the count N by one.

Ｓ４６では、制御装置４６は、カウントＮが所定回数（例えば３回）以上であるか否かを判断する。カウントＮが所定回数に満たない場合（ＮＯの場合）、処理はＳ１４へ戻る。カウントＮが所定回数以上の場合（ＹＥＳの場合）、処理はＳ４８へ進む。 In S46, the control device 46 determines whether or not the count N is equal to or greater than a predetermined number of times (eg, 3 times). If the count N is less than the predetermined number (NO), the process returns to S14. If the count N is greater than or equal to the predetermined number of times (YES), the process proceeds to S48.

Ｓ４８では、制御装置４６は、湯はり最大流量Ｗｍａｘを所定流量幅（例えば１Ｌ／分）だけ低下させる。Ｓ４８の後、処理はＳ１４へ戻る。 In S48, the controller 46 reduces the maximum hot water filling flow rate Wmax by a predetermined flow rate width (for example, 1 L/min). After S48, the process returns to S14.

なお、Ｓ４２、Ｓ４６、Ｓ４８からＳ１４へ処理が戻った場合、その後のＳ２８では、Ｓ３０で湯はり電磁弁３４を開いてからの経過時間をＴ１として、経過時間Ｔ１が第１所定時間未満であるか否かを判断する。 When the process returns from S42, S46, S48 to S14, in S28, the elapsed time from opening the hot water filling solenoid valve 34 in S30 is T1, and the elapsed time T1 is less than the first predetermined time. or not.

図３、図４の処理によれば、湯はり運転が終了する前に、流量Ｗが消火水量以下となって（Ｓ１４でＹＥＳ）、湯はり電磁弁３４が閉じられ（Ｓ２２）、熱源機１８による水の加熱が停止した場合（Ｓ２４）に、以下の条件（１）－（３）が全て満たされると、カウントＮが増加する。
（１）流量センサ１２で検出される流量Ｗが消火水量以下となって、湯はり電磁弁３４を閉じ、熱源機１８による水の加熱を停止して湯はり運転を中断した時点での、出湯サーミスタ２４で検出される出湯温度Ｔｈが所定温度未満である（Ｓ２６でＹＥＳ）。
（２）流量センサ１２で検出される流量Ｗが消火水量以下となって、湯はり電磁弁３４を閉じ、熱源機１８による水の加熱を停止して湯はり運転を中断した場合に、湯はり電磁弁３４を開いてから湯はり運転を中断するまでの経過時間Ｔ１が、第１所定時間未満である（Ｓ２８でＹＥＳ）。
（３）流量センサ１２で検出される流量Ｗが消火水量以下となって、湯はり電磁弁３４を閉じ、熱源機１８による水の加熱を停止して湯はり運転を中断した後に、再び湯はり電磁弁３４を開いて、熱源機１８による水の加熱を開始した場合に、再び湯はり電磁弁３４を開いてから流量センサ１２で検出される流量Ｗが点火水量以上となるまでの経過時間Ｔ２が第２所定時間未満である（Ｓ４２でＹＥＳ）。 According to the processes of FIGS. 3 and 4, before the hot water filling operation ends, the flow rate W becomes equal to or less than the amount of fire extinguishing water (YES in S14), the hot water filling solenoid valve 34 is closed (S22), and the heat source machine 18 is closed. When the heating of water by has stopped (S24), the count N is increased when all of the following conditions (1) to (3) are satisfied.
(1) When the flow rate W detected by the flow sensor 12 becomes equal to or less than the fire extinguishing water amount, the hot water filling solenoid valve 34 is closed, the heating of the water by the heat source device 18 is stopped, and the hot water filling operation is interrupted. The outlet hot water temperature Th detected by the thermistor 24 is lower than the predetermined temperature (YES in S26).
(2) When the flow rate W detected by the flow rate sensor 12 becomes equal to or less than the amount of fire extinguishing water, the hot water filling solenoid valve 34 is closed, the heating of the water by the heat source device 18 is stopped, and the hot water filling operation is interrupted. The elapsed time T1 from when the electromagnetic valve 34 is opened until the hot water filling operation is interrupted is less than the first predetermined time (YES in S28).
(3) When the flow rate W detected by the flow rate sensor 12 becomes equal to or less than the amount of fire extinguishing water, the hot water filling solenoid valve 34 is closed, the heating of the water by the heat source device 18 is stopped, and the hot water filling operation is interrupted, and then hot water is filled again. When the solenoid valve 34 is opened and water heating by the heat source device 18 is started, the elapsed time T2 from when the hot water filling solenoid valve 34 is opened again until the flow rate W detected by the flow rate sensor 12 becomes equal to or greater than the ignition water quantity. is less than the second predetermined time (YES in S42).

上記の条件（１）を満たさない場合は、アダプタ３２に所定温度以上の高温の水が供給されたことで、遮断弁５６が閉じられたものと考えられる。この場合には、アダプタ３２は正常に動作しており、大流量の水が供給されたことによるアダプタ３２の誤作動とは考えにくい。 If the above condition (1) is not satisfied, it is considered that the shutoff valve 56 is closed because the adapter 32 is supplied with water having a temperature equal to or higher than the predetermined temperature. In this case, the adapter 32 is operating normally, and it is unlikely that the adapter 32 malfunctioned due to the large flow rate of water being supplied.

上記の条件（２）を満たさない場合は、湯はり運転の開始からある程度の時間が経過してから、例えば断水や他の水栓への水の供給に起因して、流量Ｗが消火水量以下となり、湯はり運転が中断したものと考えられる。アダプタ３２に大流量の水が供給されて遮断弁５６が閉じてしまう場合は、湯はり運転の開始直後から遮断弁５６が閉じ、湯はり運転が中断するものと考えられる。従って、この場合も、大流量の水が供給されたことによるアダプタ３２の誤作動とは考えにくい。 If the above condition (2) is not satisfied, after a certain amount of time has passed since the start of the hot water filling operation, the flow rate W is less than or equal to the fire extinguishing water amount due to, for example, a water outage or water supply to another faucet. As a result, it is thought that the hot water filling operation was interrupted. If a large flow rate of water is supplied to the adapter 32 and the cutoff valve 56 is closed, it is considered that the cutoff valve 56 closes immediately after the hot water filling operation is started and the hot water filling operation is interrupted. Therefore, in this case as well, it is unlikely that the adapter 32 malfunctioned due to the supply of a large amount of water.

上記の条件（３）を満たさない場合は、湯はり運転が中断され、湯はり運転の再開からある程度の時間が経過してから、流量Ｗが点火水量以上となったものと考えられる。この場合も、断水や他の水栓への水の供給に起因して、流量Ｗが消火水量以下となって湯はり運転が中断したものと考えられる。従って、この場合も、大流量の水が供給されたことによるアダプタ３２の誤作動とは考えにくい。 If the above condition (3) is not satisfied, it is considered that the hot water filling operation was interrupted and the flow rate W became equal to or greater than the ignition water quantity after a certain amount of time had passed since the hot water filling operation was resumed. In this case as well, it is considered that the flow rate W fell below the amount of fire extinguishing water due to a water outage or water supply to other faucets, and the hot water filling operation was interrupted. Therefore, in this case as well, it is unlikely that the adapter 32 malfunctioned due to the supply of a large amount of water.

上記の条件（１）－（３）が全て満たされる場合には、大流量の水が供給されたことによるアダプタ３２の誤作動によって遮断弁５６が閉じられたものと考えられる。図３、図４の処理では、条件（１）－（３）が全て満たされる事象が所定回数生じた場合（Ｓ４６でＹＥＳ）に、湯はり最大流量Ｗｍａｘを、それまでの設定値よりも低い値に変更する。これによって、その後の湯はり運転において、大流量の水が供給されることによるアダプタ３２の誤作動を抑制することができる。 If all of the above conditions (1) to (3) are satisfied, it is considered that shutoff valve 56 was closed due to malfunction of adapter 32 due to the supply of a large flow of water. In the processes of FIGS. 3 and 4, when an event that satisfies all of the conditions (1) to (3) occurs a predetermined number of times (YES in S46), the maximum hot water filling flow rate Wmax is set lower than the previous set value. value. As a result, it is possible to suppress malfunction of the adapter 32 due to a large flow of water being supplied in the subsequent hot water filling operation.

なお、より簡易的に判定する場合には、制御装置４６は、上記の条件（１）－（３）についてすべて判定する必要はなく、例えば、上記の条件（１）－（３）のうちの何れか１つまたは２つが満たされた回数が所定回数に達した場合に、Ｓ４８の処理を実行してもよい。 It should be noted that, in the case of a simpler determination, the control device 46 does not need to determine all of the above conditions (1) to (3). The process of S48 may be executed when the number of times that any one or two of the conditions is satisfied reaches a predetermined number of times.

なお、上記の条件（３）については、流量センサ１２で検出される流量Ｗが点火水量以上となった場合に、湯はり運転が再開されたと判断しているが、流量Ｗが、点火水量でなくても、湯はり運転が再開されたと判断できる流量（例えば２Ｌ／分～１０Ｌ／分）以上となった場合に、湯はり運転が再開されたと判断してもよい。 Regarding the above condition (3), when the flow rate W detected by the flow rate sensor 12 is equal to or greater than the ignition water amount, it is determined that the hot water filling operation has been restarted. Even if not, it may be determined that the hot water filling operation has been restarted when the flow rate (for example, 2 L/min to 10 L/min) at which it can be determined that the hot water filling operation has been restarted is reached.

以上のように、本実施例の風呂給湯装置２（風呂装置の例）は、水を加熱する熱源機１８と、熱源機１８で加熱された水を浴槽６へ供給する給湯経路２０および第１出湯経路２８（湯はり経路の例）と、浴槽６に取り付けられており、第１出湯経路２８からの水を浴槽６の内部へ送り出すアダプタ３２と、制御装置４６を備えている。アダプタ３２は、第１出湯経路２８から水が流入する流入口５２と、浴槽６の内部へ水が流出する流出口５０と、流入口５２から流出口５０へ水が流れる経路を開閉可能な遮断弁５６と、遮断弁５６を開く方向に付勢する圧縮バネ５８（弾性部材の例）と、流出口５０の近傍に設けられており、遮断弁５６を閉じる方向に付勢する感温バネ６０（付勢機構の例）を備えている。感温バネ６０の付勢力は、感温バネ６０の温度に応じて変化する。感温バネ６０の温度が所定温度に満たない場合に、感温バネ６０による付勢力は圧縮バネ５８による付勢力よりも小さくなる。感温バネ６０の温度が所定温度以上の場合に、感温バネ６０による付勢力は圧縮バネ５８による付勢力よりも大きくなる。制御装置４６は、熱源機１８で加熱された水を、予め設定された湯はり最大流量Ｗｍａｘ（上限流量の例）以下の流量で浴槽６へ供給する湯はり運転を実行可能である。制御装置４６は、湯はり運転において、アダプタ３２の異常な動作により遮断弁５６が閉じられたと判定した場合に、湯はり最大流量Ｗｍａｘを低減させる。 As described above, the bath hot water supply apparatus 2 (an example of a bath apparatus) of this embodiment includes the heat source device 18 that heats water, the hot water supply path 20 that supplies the water heated by the heat source device 18 to the bathtub 6, and the first It is equipped with a hot water outlet path 28 (an example of a hot water filling path), an adapter 32 attached to the bathtub 6 for sending water from the first hot water outlet path 28 into the bathtub 6, and a control device 46. The adapter 32 can open and close an inlet 52 through which water flows from the first hot water outlet path 28, an outlet 50 through which water flows out into the bathtub 6, and a path through which water flows from the inlet 52 to the outlet 50. A valve 56, a compression spring 58 (an example of an elastic member) that biases the shutoff valve 56 in the opening direction, and a temperature sensing spring 60 that is provided near the outflow port 50 and biases the shutoff valve 56 in the closing direction. (example of biasing mechanism). The biasing force of the temperature-sensitive spring 60 changes according to the temperature of the temperature-sensitive spring 60 . When the temperature of the temperature-sensitive spring 60 is lower than the predetermined temperature, the biasing force of the temperature-sensitive spring 60 becomes smaller than the biasing force of the compression spring 58 . When the temperature of the temperature-sensitive spring 60 is equal to or higher than the predetermined temperature, the biasing force of the temperature-sensitive spring 60 is greater than the biasing force of the compression spring 58 . The control device 46 can perform a hot water filling operation in which the water heated by the heat source device 18 is supplied to the bathtub 6 at a flow rate equal to or lower than a preset maximum hot water filling flow rate Wmax (an example of the upper limit flow rate). When the control device 46 determines that the cutoff valve 56 is closed due to the abnormal operation of the adapter 32 during the hot water filling operation, the control device 46 reduces the hot water filling maximum flow rate Wmax.

上記の風呂給湯装置２では、湯はり運転において、大流量の水が第１出湯経路２８からアダプタ３２を介して浴槽６へ供給されて、アダプタ３２の異常な動作により遮断弁５６が閉じられると、その後の湯はり運転における湯はり最大流量Ｗｍａｘを低減させる。このような構成とすることによって、大流量の水が流れることに起因して生じるアダプタ３２内部における水の圧力変動を抑制し、アダプタ３２が異常な動作をすることを抑制することができる。アダプタ３２の異常な動作によって湯はり運転が中断されることを抑制することができる。 In the bath water heater 2 described above, when a large flow of water is supplied from the first hot water outlet path 28 to the bathtub 6 through the adapter 32 during the hot water filling operation, and the shutoff valve 56 is closed due to the abnormal operation of the adapter 32, , to reduce the maximum hot water filling flow rate Wmax in the subsequent hot water filling operation. By adopting such a configuration, it is possible to suppress the pressure fluctuation of the water inside the adapter 32 caused by the flow of a large amount of water, and to suppress the adapter 32 from operating abnormally. It is possible to suppress interruption of the hot water filling operation due to an abnormal operation of the adapter 32. - 特許庁

上記の風呂給湯装置２は、給湯経路２０を流れる水の流量を検出する流量センサ１２をさらに備えている。制御装置４６は、湯はり運転の実行中に、湯はり運転を中断した後、再び湯はり運転を開始してから流量センサ１２で検出される流量が点火水量（所定流量の例）以上となるまでの経過時間Ｔ２が第２所定時間（所定時間の例）に満たない場合に、アダプタ３２の異常な動作により遮断弁５６が閉じられたと判定する。 The bath water heater 2 described above further includes a flow rate sensor 12 that detects the flow rate of water flowing through the hot water supply path 20 . The control device 46 interrupts the hot water filling operation during execution of the hot water filling operation, and then restarts the hot water filling operation. If the elapsed time T2 until is less than the second predetermined time (an example of the predetermined time), it is determined that the shutoff valve 56 has been closed due to the abnormal operation of the adapter 32 .

大流量の水が流れることに起因するアダプタ３２の異常な動作によって遮断弁５６が閉じられた場合は、アダプタ３２の内部で水が流れなくなると、乱流に起因する水の圧力変動が消失し、アダプタ３２の異常な動作は速やかに解消されて、遮断弁５６が再び開かれる。このため、湯はり運転を中断した後、再び湯はり運転を開始してから流量センサ１２で検出される流量が点火水量以上となるまでの経過時間Ｔ２が第２所定時間に満たない場合には、大流量の水が流れることに起因するアダプタ３２の異常な動作によって遮断弁５６が閉じられた可能性が高い。上記の構成によれば、アダプタ３２の異常な動作によって遮断弁５６が閉じられたか否かを、適切に判定することができる。 If the shut-off valve 56 is closed due to abnormal operation of the adapter 32 caused by a large flow of water, the water pressure fluctuation caused by the turbulent flow disappears when the water stops flowing inside the adapter 32. , the abnormal operation of the adapter 32 is quickly resolved and the isolation valve 56 is opened again. Therefore, if the elapsed time T2 from when the hot water filling operation is restarted after the hot water filling operation is interrupted until the flow rate detected by the flow sensor 12 becomes equal to or greater than the ignition water quantity is less than the second predetermined time. , it is highly probable that the shut-off valve 56 was closed due to abnormal operation of the adapter 32 caused by a large flow of water. According to the above configuration, it is possible to appropriately determine whether or not the shutoff valve 56 has been closed due to the abnormal operation of the adapter 32 .

上記の風呂給湯装置２は、給湯経路２０を流れる水の温度を検出する出湯サーミスタ２４（温度センサの例）をさらに備えている。制御装置４６は、湯はり運転の実行中に、湯はり運転を中断し、かつ湯はり運転を中断した時点において出湯サーミスタ２４で検出される温度が所定温度に満たない場合に、アダプタ３２の異常な動作により遮断弁５６が閉じられたと判定する。 The bath water heater 2 described above further includes a hot water outlet thermistor 24 (an example of a temperature sensor) that detects the temperature of water flowing through the hot water supply path 20 . The control device 46 interrupts the hot water filling operation during execution of the hot water filling operation, and if the temperature detected by the hot water discharge thermistor 24 at the time when the hot water filling operation is interrupted is less than a predetermined temperature, the adapter 32 is abnormal. It is determined that the shut-off valve 56 is closed by such operation.

第１出湯経路２８からアダプタ３２に供給される水の温度が所定温度以上の状態で、遮断弁５６が閉じた場合には、アダプタ３２が正常な動作をしているものと考えられるが、第１出湯経路２８からアダプタ３２に供給される水の温度が所定温度に満たない状態で、遮断弁５６が閉じた場合には、アダプタ３２が異常な動作をしているものと考えられる。このため、湯はり運転の実行中に、湯はり運転を中断し、かつ湯はり運転を中断した時点において出湯サーミスタ２４で検出される温度が所定温度に満たない場合には、大流量の水が流れることに起因するアダプタ３２の異常な動作によって遮断弁５６が閉じられた可能性が高い。上記の構成によれば、アダプタ３２の異常な動作によって遮断弁５６が閉じられたか否かを、適切に判定することができる。 When the temperature of the water supplied to the adapter 32 from the first hot water outlet path 28 is equal to or higher than the predetermined temperature and the cutoff valve 56 is closed, it is considered that the adapter 32 is operating normally. If the shut-off valve 56 is closed while the temperature of the water supplied to the adapter 32 from the hot water supply path 28 is below the predetermined temperature, the adapter 32 is considered to be operating abnormally. Therefore, if the hot water filling operation is interrupted during execution of the hot water filling operation and the temperature detected by the hot water discharge thermistor 24 at the time when the hot water filling operation is interrupted is less than the predetermined temperature, a large flow rate of water will be supplied. It is likely that the shutoff valve 56 was closed due to abnormal operation of the adapter 32 due to flow. According to the above configuration, it is possible to appropriately determine whether or not the shutoff valve 56 has been closed due to the abnormal operation of the adapter 32 .

上記の実施例では、熱源機１８が燃料を燃焼させた燃焼熱によって水を加熱する燃焼熱源機である場合について説明したが、熱源機１８は、例えばヒートポンプや電気ヒータ等の、他の方式で水を加熱する熱源機であってもよい。 In the above embodiment, the case where the heat source device 18 is a combustion heat source device that heats water with the combustion heat of burning fuel has been described, but the heat source device 18 may be a heat pump, an electric heater, or another method. It may be a heat source machine that heats water.

上記の実施例では、アダプタ３２の付勢機構が、形状記憶合金製の感温バネ６０である構成について説明した。これとは異なり、アダプタ３２の付勢機構が、例えば、流出口５０の水温を検出する温度センサと、その温度センサの検出温度に応じて遮断弁５６を閉じる方向に付勢するアクチュエータを備える構成としてもよい。この場合も、流出口５０の水温が所定温度（例えば６０℃）より低い場合には、アクチュエータの付勢力が圧縮バネ５８の付勢力よりも弱く、流出口５０の水温が所定温度（例えば６０℃）以上となると、アクチュエータの付勢力が圧縮バネ５８の付勢力よりも強くなるように、アクチュエータの動作を制御することによって、アダプタ３２の遮断弁５６を流出口５０の水温に応じて自動的に開閉することができる。 In the above embodiment, the configuration in which the biasing mechanism of the adapter 32 is the temperature-sensitive spring 60 made of shape memory alloy has been described. Unlike this, the urging mechanism of the adapter 32 includes, for example, a temperature sensor that detects the water temperature of the outflow port 50 and an actuator that urges the shutoff valve 56 in the closing direction according to the temperature detected by the temperature sensor. may be Also in this case, when the water temperature at the outlet 50 is lower than a predetermined temperature (eg, 60° C.), the biasing force of the actuator is weaker than the biasing force of the compression spring 58, and the water temperature at the outlet 50 is lower than the predetermined temperature (eg, 60° C.). ), by controlling the operation of the actuator so that the biasing force of the actuator becomes stronger than the biasing force of the compression spring 58, the cutoff valve 56 of the adapter 32 is automatically closed according to the water temperature of the outlet 50. Can be opened and closed.

上記の実施例において、アダプタ３２に、遮断弁５６が開いているか閉じているかを検出する機構を設けてもよい。この場合、制御装置４６は、湯はり運転において、遮断弁５６が閉じたことを検出した時点での出湯サーミスタ２４の検出温度Ｔｈが所定温度未満の場合に、アダプタ３２の異常な動作によって遮断弁５６が閉じられたと判定して、湯はり最大流量Ｗｍａｘを低減させてもよい。 In the above embodiment, adapter 32 may be provided with a mechanism for detecting whether isolation valve 56 is open or closed. In this case, in the hot water filling operation, if the detected temperature Th of the hot water supply thermistor 24 at the time when it is detected that the shutoff valve 56 is closed is less than the predetermined temperature, the adapter 32 abnormally operates to close the shutoff valve. 56 may be determined to be closed, and the hot water filling maximum flow rate Wmax may be reduced.

上記の実施例において、Ｓ２８の判断で使用する経過時間Ｔ１の開始時点および終了時点や、Ｓ４２の判断で使用する経過時間Ｔ２の開始時点および終了時点は、種々のタイミングとすることができる。経過時間Ｔ１の開始時点は、例えば、Ｓ４で流量Ｗが点火水量以上となった（ＹＥＳとなった）時点としてもよい。経過時間Ｔ１の終了時点は、湯はり運転が中断されたと判断できる時点であればよく、例えば、Ｓ１４で流量Ｗが消火水量以下となった（ＹＥＳとなった）時点でもよいし、Ｓ２２で湯はり電磁弁３４が閉じられた時点としてもよい。経過時間Ｔ２の開始時点は、例えば、Ｓ３２で流量Ｗが点火水量以上となった（ＹＥＳとなった）時点としてもよい。 In the above embodiment, the start and end times of the elapsed time T1 used in the determination of S28 and the start and end times of the elapsed time T2 used in the determination of S42 can be various timings. The starting time of the elapsed time T1 may be, for example, the time when the flow rate W becomes equal to or greater than the ignition water quantity (YES) in S4. The end point of the elapsed time T1 may be any point at which it can be determined that the hot water filling operation has been interrupted. It may be the time when beam electromagnetic valve 34 is closed. The starting time point of the elapsed time T2 may be, for example, the time point when the flow rate W becomes equal to or greater than the ignition water amount (YES) in S32.

以上、本発明の具体例を詳細に説明したが、これらは例示にすぎず、特許請求の範囲を限定するものではない。特許請求の範囲に記載の技術には、以上に例示した具体例を様々に変形、変更したものが含まれる。また、本明細書または図面に説明した技術要素は、単独であるいは各種の組合せによって技術的有用性を発揮するものであり、出願時の請求項記載の組合せに限定されるものではない。また、本明細書または図面に例示した技術は、複数目的を同時に達成するものであり、そのうちの一つの目的を達成すること自体で技術的有用性を持つものである。 Although specific examples of the present invention have been described in detail above, these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above. In addition, the technical elements described in this specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims as of the filing. In addition, the techniques exemplified in this specification or drawings achieve multiple purposes at the same time, and achieving one of them has technical utility in itself.

２：風呂給湯装置
４：上水道
６：浴槽
８：水栓
１０：給水経路
１２：流量センサ
１４：加熱経路
１６：第１バイパス経路
１８：熱源機
２０：給湯経路
２２：第１バイパス電磁弁
２４：出湯サーミスタ
２６：出湯サーボ弁
２８：第１出湯経路
３０：第２出湯経路
３２：アダプタ
３４：湯はり電磁弁
３６：第１逆止弁
３８：第２逆止弁
４０：第２バイパス経路
４２：第２バイパス電磁弁
４４：水流スイッチ
４６：制御装置
４８：ケーシング
５０：流出口
５２：流入口
５４：ノズル
５６：遮断弁
５８：圧縮バネ
６０：感温バネ 2: Bath water heater 4: Water supply 6: Bathtub 8: Faucet 10: Water supply path 12: Flow rate sensor 14: Heating path 16: First bypass path 18: Heat source device 20: Hot water supply path 22: First bypass solenoid valve 24: hot water outlet thermistor 26: hot water outlet servo valve 28: first hot water outlet path 30: second hot water outlet path 32: adapter 34: hot water filling solenoid valve 36: first check valve 38: second check valve 40: second bypass path 42: Second bypass solenoid valve 44 : Water flow switch 46 : Controller 48 : Casing 50 : Outlet 52 : Inlet 54 : Nozzle 56 : Shutoff valve 58 : Compression spring 60 : Temperature sensitive spring

Claims

a heat source machine for heating water;
a hot water supply path for supplying the water heated by the heat source machine to the bathtub;
a hot water filling valve capable of opening and closing the hot water filling path;
a flow rate limiting means capable of limiting the flow rate of water flowing through the hot water filling path to a preset upper limit flow rate or less;
a flow rate sensor for detecting the flow rate of water flowing through the hot water filling path;
an adapter attached to the bathtub for sending water from the hot water supply path to the inside of the bathtub;
equipped with a controller,
The adapter is
an inflow port into which water flows from the hot water filling path;
an outlet through which water flows out into the bathtub;
a shutoff valve capable of opening and closing a path through which water flows from the inflow port to the outflow port;
an elastic member that biases the shutoff valve in a direction to open it;
A biasing mechanism is provided near the outflow port and biases the shutoff valve in a closing direction,
The biasing force of the biasing mechanism changes according to the temperature of the biasing mechanism,
when the temperature of the biasing mechanism is below a predetermined temperature, the biasing force of the biasing mechanism becomes smaller than the biasing force of the elastic member;
when the temperature of the biasing mechanism is equal to or higher than the predetermined temperature, the biasing force of the biasing mechanism becomes larger than the biasing force of the elastic member;
The control device is capable of executing a hot-water filling operation for supplying water heated by the heat source machine to the bathtub,
When the hot water filling operation is started, the control device opens the hot water filling valve,
After starting the hot water filling operation, when a set amount of water is supplied to the bathtub, the control device closes the hot water filling valve to end the hot water filling operation,
The control device closes the hot water filling valve to interrupt the hot water filling operation when the flow rate of water flowing through the hot water filling path falls below a predetermined flow rate during execution of the hot water filling operation, and then opening the hot water filling valve to restart the hot water filling operation;
During the execution of the hot water filling operation, the control device controls, after the hot water filling operation is interrupted, the elapsed time from when the hot water filling operation is resumed until the flow rate detected by the flow sensor becomes equal to or greater than a predetermined flow rate. is less than a predetermined time, the bath apparatus reduces the upper limit flow rate.

a heat source machine for heating water;
a hot water supply path for supplying the water heated by the heat source machine to the bathtub;
a hot water filling valve capable of opening and closing the hot water filling path;
a flow rate limiting means capable of limiting the flow rate of water flowing through the hot water filling path to a preset upper limit flow rate or less;
a flow rate sensor for detecting the flow rate of water flowing through the hot water filling path;
a temperature sensor that detects the temperature of water flowing through the hot water filling path;
an adapter attached to the bathtub for sending water from the hot water supply path to the inside of the bathtub;
equipped with a controller,
The adapter is
an inflow port into which water flows from the hot water filling path;
an outlet through which water flows out into the bathtub;
a shutoff valve capable of opening and closing a path through which water flows from the inflow port to the outflow port;
an elastic member that biases the shutoff valve in a direction to open it;
A biasing mechanism is provided near the outflow port and biases the shutoff valve in a closing direction,
The biasing force of the biasing mechanism changes according to the temperature of the biasing mechanism,
when the temperature of the biasing mechanism is below a predetermined temperature, the biasing force of the biasing mechanism becomes smaller than the biasing force of the elastic member;
when the temperature of the biasing mechanism is equal to or higher than the predetermined temperature, the biasing force of the biasing mechanism becomes larger than the biasing force of the elastic member;
The control device is capable of executing a hot-water filling operation for supplying water heated by the heat source machine to the bathtub,
When the hot water filling operation is started, the control device opens the hot water filling valve,
After starting the hot water filling operation, when a set amount of water is supplied to the bathtub, the control device closes the hot water filling valve to end the hot water filling operation,
The control device closes the hot water filling valve to interrupt the hot water filling operation when the flow rate of water flowing through the hot water filling path falls below a predetermined flow rate during execution of the hot water filling operation, and then opening the hot water filling valve to restart the hot water filling operation;
The control device interrupts the hot water filling operation during execution of the hot water filling operation, and if the temperature detected by the temperature sensor at the time when the hot water filling operation is interrupted is less than the predetermined temperature, A bath apparatus that reduces the upper limit flow rate .