JP4567574B2 - Mist sauna equipment - Google Patents

Mist sauna equipment Download PDF

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JP4567574B2
JP4567574B2 JP2005320681A JP2005320681A JP4567574B2 JP 4567574 B2 JP4567574 B2 JP 4567574B2 JP 2005320681 A JP2005320681 A JP 2005320681A JP 2005320681 A JP2005320681 A JP 2005320681A JP 4567574 B2 JP4567574 B2 JP 4567574B2
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JP2007125217A (en
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誠士 今井
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Rinnai Corp
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Description

本発明は、浴室に配置した噴霧ヘッドから温水を噴霧させてサウナ効果を得られるようにしたミストサウナ装置に関する。   The present invention relates to a mist sauna apparatus in which hot water is sprayed from a spray head arranged in a bathroom so as to obtain a sauna effect.

従来、この種のミストサウナ装置では、一般に、熱源機の給湯用熱源部で加熱された温水を噴霧ヘッドに供給している(例えば、特許文献１参照)。ここで、給湯用熱源部のバーナを燃焼させるには、所定の最低作動流量(例えば、４リットル／分)以上の水を給湯用熱源部の熱交換器に流す必要がある。一方、噴霧ヘッドで温水をミスト状に噴出させるのに適した流量は微少量(例えば、２リットル／分)であり、給湯用熱源部で加熱された温水を全て噴霧ヘッドから噴出させるとミスト粒径が大きくなって、使用者に不快感を与える虞がある。そこで、上記特許文献１に記載のものでは、給湯用熱源部と噴霧ヘッドとの間の経路から排水路を分岐し、給湯用熱源部で加熱された温水の一部を排水して、噴霧ヘッドに適量の温水が供給されるようにしている。   Conventionally, in this type of mist sauna device, generally, hot water heated by a heat source for hot water supply of a heat source machine is supplied to a spray head (see, for example, Patent Document 1). Here, in order to burn the burner of the hot water supply heat source section, it is necessary to flow water of a predetermined minimum operating flow rate (for example, 4 liters / minute) to the heat exchanger of the hot water supply heat source section. On the other hand, the flow rate suitable for ejecting hot water in the form of mist with a spray head is very small (for example, 2 liters / minute). There is a possibility that the diameter becomes large and the user is uncomfortable. Therefore, in the one described in Patent Document 1, the drainage channel is branched from the path between the hot water supply heat source section and the spray head, and a part of the hot water heated by the hot water supply heat source section is drained, so that the spray head An appropriate amount of hot water is supplied to the.

然し、このように温水の一部を排水したのでは、資源の無駄になりランニングコストが増大する。そこで、噴霧ヘッドに連なる噴霧用流路の上流端に、水道水を供給する給水配管を接続すると共に、噴霧用流路の途中に液々熱交換器を介設し、熱源機の暖房用熱源部から熱媒循環路を介して液々熱交換器に供給される不凍液などの熱媒体により、噴霧ヘッドに供給する水を加熱するようにしたミストサウナ装置も知られている(例えば、特許文献２参照)。これによれば、給湯用熱源部を使用する場合のような最低作動流量による流量の制限を受けず、液々熱交換器に流す水の流量を抑えることにより、液々熱交換器で加熱された温水の全量を噴霧ヘッドから所望のミスト粒径で噴霧することができる。そのため、排水が不要になり、ランニングコストを低減できる。   However, if part of the hot water is drained in this way, resources are wasted and running costs increase. Therefore, a water supply pipe for supplying tap water is connected to the upstream end of the spraying channel connected to the spraying head, and a liquid heat exchanger is provided in the middle of the spraying channel to heat the heating source of the heat source unit. There is also known a mist sauna device in which water supplied to the spray head is heated by a heat medium such as antifreeze supplied from the section to the liquid heat exchanger via the heat medium circuit (for example, Patent Document 2). According to this, it is heated by the liquid-liquid heat exchanger by suppressing the flow rate of water flowing to the liquid-liquid heat exchanger without being restricted by the flow rate due to the minimum operating flow rate when using a heat source for hot water supply. The entire amount of hot water can be sprayed from the spray head with the desired mist particle size. Therefore, drainage becomes unnecessary, and the running cost can be reduced.

尚、このものでは、液々熱交換器の上流側の噴霧用流路の部分に閉弁で液々熱交換器への給水を遮断する給水弁が介設され、液々熱交換器の下流側の噴霧用流路の部分に閉弁で噴霧ヘッドへの給水を遮断する噴霧弁が介設されると共に、液々熱交換器の下流側の噴霧用流路の部分の温度を検出する噴霧温度センサが設けられ、また、熱媒循環路に閉弁で液々熱交換器への熱媒体の供給を遮断する熱媒弁が介設されると共に、熱媒循環路に流れる熱媒体の温度を検出する熱媒温度センサが設けられている。そして、ミスト運転の開始指令が出されたとき、先ず、熱源機を作動させると共に熱媒弁を開弁し、熱媒温度センサの検出温度が所定の予熱完了温度に上昇したところで給水弁及び噴霧弁を開弁してミスト運転を開始し、以後、噴霧温度センサの検出温度が設定温度に維持されるように温調制御を行っている。また、噴霧弁の下流側の噴霧用流路の部分に排水弁を介設した排水路を分岐接続し、ミスト運転終了後に排水弁を開弁して、噴霧弁の下流側の噴霧用流路の部分に残留する水を排水路を介して排水するようにしている。   In this case, a water supply valve for shutting off the water supply to the liquid heat exchanger by closing the valve is provided in a portion of the spray flow path upstream of the liquid heat exchanger, and downstream of the liquid heat exchanger. A spray valve that shuts off the water supply to the spray head by closing the valve in the spray channel portion on the side and detects the temperature of the spray channel portion on the downstream side of the liquid-liquid heat exchanger A temperature sensor is provided, and a heat medium valve that shuts off the supply of the heat medium to the liquid-liquid heat exchanger by closing the heat medium circuit is provided, and the temperature of the heat medium that flows through the heat medium circuit A heat medium temperature sensor for detecting the above is provided. When a mist operation start command is issued, first, the heat source device is operated and the heat medium valve is opened. When the temperature detected by the heat medium temperature sensor rises to a predetermined preheating completion temperature, the water supply valve and the spray The valve is opened and the mist operation is started. Thereafter, temperature control is performed so that the temperature detected by the spray temperature sensor is maintained at the set temperature. In addition, a drainage channel provided with a drainage valve is branched and connected to a portion of the spraying channel downstream of the spray valve, and the drainage valve is opened after the mist operation is completed. The water remaining in this part is drained through the drainage channel.

ところで、液々熱交換器を用いる場合、長期間使用すると、腐食等で液々熱交換器の内部漏れを生ずる可能性がある。然し、上記特許文献２に記載のものでは、液々熱交換器の内部漏れに対する対策が全く講じられておらず、内部漏れを生じてもそのまま放置されてしまう。
特開２００２−４８９号公報 特開２００３−３３４２３０号公報(図６) By the way, when using a liquid heat exchanger, if it is used for a long period of time, internal leakage of the liquid heat exchanger may occur due to corrosion or the like. However, in the thing of the said patent document 2, the countermeasure with respect to the internal leakage of a liquid heat exchanger is not taken at all, and even if an internal leakage arises, it will be left as it is.
JP 2002-489 A Japanese Patent Laying-Open No. 2003-334230 (FIG. 6)

本発明は、以上の点に鑑み、液々熱交換器の内部漏れを生じた場合にこれを検出できるようにして信頼性を向上させたミストサウナ装置を提供することをその課題としている。   This invention makes it the subject to provide the mist sauna apparatus which improved the reliability so that this could be detected when the internal leak of a liquid heat exchanger produced in view of the above point.

上記課題を解決するために、本発明は、熱源機と、浴室に配置した噴霧ヘッドと、噴霧ヘッドに連なる噴霧用流路に介設した液々熱交換器とを備え、噴霧ヘッドに供給する水を熱源機から熱媒循環路を介して液々熱交換器に供給する熱媒体により加熱し、噴霧ヘッドから温水を噴霧させるミスト運転を行うようにしたミストサウナ装置であって、液々熱交換器の上流側の噴霧用流路の部分に介設した、閉弁で液々熱交換器への給水を遮断する給水弁と、熱媒循環路に介設した、閉弁で液々熱交換器への熱媒体の供給を遮断する熱媒弁と、熱媒循環路に流れる熱媒体の温度を検出する熱媒温度センサとを備えるものにおいて、液々熱交換器の内部漏れを検査する漏れ検査手段が設けられ、漏れ検査手段は、ミスト運転が行われていない時に給水弁を閉弁したまま熱源機を作動させると共に熱媒弁を開弁させて検査運転を行う運転制御手段と、検査運転時に液々熱交換器の内部漏れによる噴霧用流路への熱媒体の混入に起因して変化する状態量を検出する検出手段と、検出手段の検出結果に基づいて内部漏れの有無を判別する判別手段とを備え、前記検出手段は、液々熱交換器の下流側の噴霧用流路の部分の温度を前記状態量として検出する噴霧温度センサで構成され、前記判別手段は、噴霧温度センサの検出温度の所定時期からの上昇量が所定の検査時間内に所定の判定値以上になった場合に内部漏れ有りと判別するように構成され、前記判定値は、熱媒循環路に流れる熱媒体の温度が安定した時の熱媒温度センサの検出温度と前記所定時期の噴霧温度センサの検出温度との差に応じて可変設定されることを特徴とする。 In order to solve the above-described problems, the present invention includes a heat source device, a spray head disposed in a bathroom, and a liquid-to-heat exchanger provided in a spray flow channel connected to the spray head, and supplies the spray head. A mist sauna device in which water is heated by a heat medium supplied from a heat source device to a liquid heat exchanger via a heat medium circuit and sprayed with hot water from a spray head. A water supply valve that shuts off the water supply to the liquid-to-liquid heat exchanger by closing the valve, which is interposed in the spray flow path upstream of the exchanger, and a liquid heat by the valve that is inserted in the heat medium circuit. Inspecting for internal leakage of liquid-to-liquid heat exchangers with a heat medium valve that shuts off the supply of the heat medium to the exchanger and a heat medium temperature sensor that detects the temperature of the heat medium flowing in the heat medium circuit Leakage inspection means is provided, and the leakage inspection means supplies water when mist operation is not performed. Operation control means that operates the heat source unit with the valve closed and opens the heat medium valve to perform the inspection operation, and mixing of the heat medium into the spraying channel due to internal leakage of the liquid heat exchanger during the inspection operation Detection means for detecting a state quantity that changes due to the detection means, and a determination means for determining the presence or absence of internal leakage based on the detection result of the detection means, the detection means is provided downstream of the liquid-to-liquid heat exchanger. The spray temperature sensor is configured to detect the temperature of the portion of the spray flow path as the state quantity, and the determination means determines whether the amount of increase in the temperature detected by the spray temperature sensor from a predetermined time is within a predetermined inspection time. It is configured to determine that there is an internal leak when the value is equal to or greater than the value, and the determination value is determined based on the detected temperature of the heat medium temperature sensor when the temperature of the heat medium flowing in the heat medium circuit is stabilized and the predetermined time Depending on the difference between the temperature detected by the spray temperature sensor It is variably set, characterized in Rukoto.

検査運転時には、給水弁が開弁されないため、噴霧用流路の液々熱交換器内の流路部分に水圧が作用しない。従って、液々熱交換器の内部漏れが有ると、検査運転時に熱媒弁の開弁により液々熱交換器内の熱媒循環路の部分に液圧が作用したところで噴霧用流路に熱媒体が混入する。そして、本発明では、噴霧用流路への熱媒体の混入に起因して変化する状態量を検出する検出手段の検出結果に基づいて内部漏れの有無を判別するため、内部漏れを生じたときはこれを速やかに検出でき、信頼性が向上する。   During the inspection operation, since the water supply valve is not opened, water pressure does not act on the flow path portion in the liquid heat exchanger of the spray flow path. Therefore, if there is an internal leak in the liquid heat exchanger, when the heat medium valve is opened during the inspection operation and the liquid pressure acts on the part of the heat medium circuit in the liquid heat exchanger, the spray flow path is heated. Medium is mixed. In the present invention, when an internal leak has occurred, the presence / absence of the internal leak is determined based on the detection result of the detection means that detects the state quantity that changes due to the mixing of the heat medium into the spray channel. Can quickly detect this, improving reliability.

ここで、ミスト運転停止時に液々熱交換器の下流側の噴霧用流路の残留水が排水されていると、噴霧用流路への熱媒体の混入で液々熱交換器の下流側の噴霧用流路内の水位が上昇する。また、液々熱交換器の下流側の噴霧用流路の部分に排水弁を介設した排水路が分岐接続されている場合、検査運転時に排水弁を開弁させれば、排水路の分岐部上流側の噴霧用流路の部分に残留する水が噴霧用流路への熱媒体の混入で排水路に押し出されて、排水路に水が流れる。また、噴霧用流路に熱媒体が混入すると、液々熱交換器の下流側の噴霧用流路の部分の温度上昇速度が混入した熱媒体の熱影響で速くなる。従って、液々熱交換器の下流側の噴霧用流路の部分の水位や、排水路の水流や、液々熱交換器の下流側の噴霧用流路の部分の温度を上記状態量として、内部漏れの有無を判別することができる。   Here, if the residual water in the spray channel downstream of the liquid heat exchanger is drained when the mist operation is stopped, the heat medium mixed into the spray channel causes the downstream of the liquid heat exchanger. The water level in the spray channel rises. In addition, when a drainage channel with a drainage valve is connected to the spray channel on the downstream side of the liquid heat exchanger, if the drainage valve is opened during the inspection operation, the drainage channel is branched. Water remaining in the spray channel on the upstream side of the unit is pushed out into the drainage channel due to mixing of the heat medium into the spray channel, and the water flows into the drainage channel. Further, when the heat medium is mixed into the spray flow path, the temperature increase rate of the spray flow path portion on the downstream side of the liquid heat exchanger becomes faster due to the heat effect of the mixed heat medium. Therefore, the water level of the spray channel downstream of the liquid heat exchanger, the water flow of the drainage channel, and the temperature of the spray channel downstream of the liquid heat exchanger are the above state quantities, The presence or absence of internal leakage can be determined.

然し、水位や水流を上記状態量とする場合には、検出手段として水位センサや水流スイッチ等を特別に設ける必要があり、コストが高くなる。一方、従来から温調制御のために液々熱交換器の下流側の噴霧用流路の部分の温度を検出する噴霧温度センサは設けられている。従って、液々熱交換器の下流側の噴霧用流路の部分の温度を上記状態量とする場合は、噴霧温度センサを検出手段に兼用でき、コスト的に有利である。   However, when the water level and the water flow are set to the above-described state quantities, it is necessary to provide a water level sensor, a water flow switch, and the like as detection means, which increases the cost. On the other hand, conventionally, a spray temperature sensor for detecting the temperature of the spray channel on the downstream side of the liquid heat exchanger is provided for temperature control. Therefore, when the temperature of the portion of the spray channel downstream of the liquid heat exchanger is set to the above state quantity, the spray temperature sensor can also be used as the detection means, which is advantageous in terms of cost.

このように検出手段として噴霧温度センサを用いる場合、判別手段は、噴霧温度センサの検出温度の所定時期からの上昇量が所定の検査時間内に所定の判定値以上になった場合に内部漏れ有りと判別するように構成されていることが望ましい。ここで、噴霧温度センサの検出温度(液々熱交換器の下流側の噴霧用流路の部分の温度)は噴霧用流路への熱媒体の混入を生ずると内部漏れの無い正常時より速く上昇し、検査時間内の温度上昇量が大きくなる。従って、上記判定値を正常時における検査時間内の温度上昇量の上限よりも若干高く設定しておくことにより、内部漏れの有無を正確に判別できる。   In this way, when the spray temperature sensor is used as the detection means, the discrimination means has an internal leak when the amount of increase in the temperature detected by the spray temperature sensor from a predetermined time becomes a predetermined determination value or more within a predetermined inspection time. It is desirable to be configured to discriminate. Here, the temperature detected by the spray temperature sensor (the temperature of the spray channel on the downstream side of the liquid heat exchanger) is faster than normal when there is no internal leakage if the heat medium enters the spray channel. The temperature rises and the amount of temperature rise within the inspection time increases. Therefore, the presence or absence of internal leakage can be accurately determined by setting the determination value slightly higher than the upper limit of the temperature rise amount within the inspection time at the normal time.

尚、液々熱交換器における熱交換量は熱媒循環路に流れる熱媒体の温度と噴霧用流路の液々熱交換器内の流路部分に残留する水の温度との温度差に応じて変化し、初期水温が低いほどその後の噴霧温度センサの検出温度の上昇速度が速くなり、正常時における検査時間内の温度上昇量も大きくなる。従って、上記判定値を一義的に定める場合には、初期水温が低い場合における正常時の温度上昇量を考慮して比較的大きな値に設定する必要がある。然し、これでは、初期水温が高い場合、噴霧用流路への熱媒体の混入を生じても、噴霧温度センサの検出温度の検査時間内の上昇量が判定値を下回り、内部漏れ有りと判定できなくなる可能性がある。   The amount of heat exchange in the liquid heat exchanger depends on the temperature difference between the temperature of the heat medium flowing in the heat medium circulation path and the temperature of water remaining in the flow path portion in the liquid heat exchanger of the spray flow path. The lower the initial water temperature, the faster the rate of increase of the detected temperature of the spray temperature sensor thereafter, and the greater the amount of temperature increase within the inspection time at normal times. Therefore, when the determination value is uniquely determined, it is necessary to set a relatively large value in consideration of the normal temperature increase when the initial water temperature is low. However, in this case, if the initial water temperature is high, the amount of increase in the detection temperature of the spray temperature sensor within the inspection time is less than the judgment value even if the heat medium is mixed into the spray passage, and it is judged that there is internal leakage. It may not be possible.

かかる不具合を解消するため、上記判定値は、熱媒循環路に流れる熱媒体の温度が安定した時の熱媒温度センサの検出温度と上記所定時期の噴霧温度センサの検出温度との差に応じて可変設定されることが望ましい。尚、熱媒温度センサは、熱媒循環路に流れる熱媒体の温度を検出するセンサとして従来から設けられているものであり、コストアップの要因にはならない。また、「熱媒体の温度が安定した時」とは、熱媒体の温度が熱源機で設定される加熱温度に上昇してほぼ一定になった時を意味する。ここで、熱媒体の温度が安定した時の熱媒温度センサの検出温度と上記所定時期の噴霧温度センサの検出温度との差は液々熱交換器での熱交換量と密接な関係があり、この差に応じて判定値を可変設定することにより誤判定を防止できる。   In order to eliminate such inconvenience, the determination value depends on the difference between the detected temperature of the heat medium temperature sensor when the temperature of the heat medium flowing in the heat medium circuit is stabilized and the detected temperature of the spray temperature sensor at the predetermined time. It is desirable to variably set. The heat medium temperature sensor is conventionally provided as a sensor for detecting the temperature of the heat medium flowing in the heat medium circulation path, and does not increase the cost. Further, “when the temperature of the heat medium is stabilized” means when the temperature of the heat medium rises to the heating temperature set by the heat source device and becomes almost constant. Here, the difference between the temperature detected by the heat medium temperature sensor when the temperature of the heat medium is stable and the temperature detected by the spray temperature sensor at the predetermined time is closely related to the amount of heat exchange in the liquid heat exchanger. Further, erroneous determination can be prevented by variably setting the determination value according to this difference.

尚、上記所定時期は検査運転の開始時であることが望ましいが、熱媒体に流れる熱媒体の温度が安定した時を所定時期とすることも可能である。   The predetermined time is preferably at the start of the inspection operation, but it is also possible to set the predetermined time when the temperature of the heat medium flowing in the heat medium is stabilized.

また、検出手段として噴霧温度センサを用いる場合は、噴霧温度センサの配置部の下流側の噴霧用流路の部分に、排水弁を介設した排水路が分岐接続され、検査運転時に排水弁が開弁されることが望ましい。これによれば、噴霧用流路に熱媒体が混入した場合、混入した熱媒体が噴霧温度センサの配置部を経由して排水路に流れるようになる。そのため、噴霧温度センサの検出温度の上昇量がより大きくなり、内部漏れの検査精度が向上する。   Further, when a spray temperature sensor is used as the detection means, a drainage channel having a drainage valve is branched and connected to a portion of the spraying channel on the downstream side of the spray temperature sensor arrangement portion, and the drainage valve is connected during the inspection operation. It is desirable that the valve be opened. According to this, when a heat medium is mixed into the spraying channel, the mixed heat medium flows into the drainage channel via the arrangement part of the spray temperature sensor. Therefore, the amount of increase in the detection temperature of the spray temperature sensor becomes larger, and the inspection accuracy for internal leakage is improved.

ところで、ミスト運転の停止直後等で噴霧温度センサの検出温度がかなり高い場合には、漏れ検査手段による漏れ検査の実行時に噴霧用流路に熱媒体が混入しても、噴霧温度センサの検出温度は然程上昇せず、誤判定を生じ易くなる。この場合、漏れ検査手段による漏れ検査を実行する前に噴霧温度センサで検出された温度が所定の基準温度を上回っているときは漏れ検査の実行を禁止する禁止手段を備えていれば、このような誤判定を防止でき、有利である。   By the way, when the temperature detected by the spray temperature sensor is quite high immediately after the mist operation is stopped, even if a heat medium is mixed into the spray flow path during the leak test by the leak test means, the temperature detected by the spray temperature sensor Does not increase so much, and erroneous determination is likely to occur. In this case, if there is a prohibition means for prohibiting the execution of the leak inspection when the temperature detected by the spray temperature sensor exceeds the predetermined reference temperature before the leak inspection by the leak inspection means is executed, This is advantageous because it can prevent erroneous misjudgment.

尚、後述する実施形態において、上記運転制御手段に相当するのは図２のＳ４のステップの処理であり、上記判別手段に相当するのは図２のＳ８〜Ｓ１０のステップの処理であり、上記禁止手段に相当するのは図２のＳ３のステップの処理である。   In the embodiment described later, the operation control means corresponds to the process of step S4 in FIG. 2, and the determination means corresponds to the processes of steps S8 to S10 in FIG. The process corresponding to the prohibiting means is the process of step S3 in FIG.

図１を参照して、１は浴室を示している。浴室１には、噴霧ヘッド２と、浴室暖房器３とが配置されている。浴室暖房器３は、浴室１内の空気を循環させる図示省略した循環ファンと放熱器４とを内蔵している。放熱器４は、浴室１の外部(屋外等)に配置した熱源機５に熱媒循環路６を介して接続されている。そして、熱源機５の作動により、熱源機５で加熱された熱媒体(水、不凍液等)が熱媒循環路６を介して放熱器４に供給され、放熱器４で加熱された空気が循環ファンにより浴室１に循環されて、浴室１の暖房が行われる。尚、熱源機５には、必要に応じて浴室暖房器３以外の暖房端末も各別の熱媒循環路を介して接続される。ここで、暖房端末には浴室暖房器３を含む温風暖房器等の高温暖房端末と床暖房等の低温暖房端末とがあり、高温暖房端末の運転時には熱源機５における熱媒体の加熱設定温度を比較的高く(例えば、８５℃)し、低温暖房端末のみの運転時には熱媒体の加熱設定温度を比較的低く(例えば、７０℃)としている。   Referring to FIG. 1, reference numeral 1 denotes a bathroom. In the bathroom 1, a spray head 2 and a bathroom heater 3 are arranged. The bathroom heater 3 includes a circulation fan (not shown) that circulates the air in the bathroom 1 and a radiator 4. The radiator 4 is connected to a heat source device 5 disposed outside the bathroom 1 (outdoors or the like) via a heat medium circulation path 6. Then, by the operation of the heat source device 5, the heat medium (water, antifreeze liquid, etc.) heated by the heat source device 5 is supplied to the radiator 4 through the heat medium circulation path 6, and the air heated by the radiator 4 circulates. The fan 1 circulates in the bathroom 1 and the bathroom 1 is heated. Note that a heating terminal other than the bathroom heater 3 is also connected to the heat source unit 5 via a separate heat medium circulation path as necessary. Here, the heating terminal includes a high-temperature heating terminal such as a warm air heater including the bathroom heater 3 and a low-temperature heating terminal such as a floor heating. Is relatively high (for example, 85 ° C.), and the heating set temperature of the heat medium is relatively low (for example, 70 ° C.) when only the low-temperature heating terminal is operated.

噴霧ヘッド２には、水道管７に逆止弁８を介して接続される噴霧用流路９を介して水が供給される。噴霧用流路９には液々熱交換器１０が介設されている。そして、熱源機５で加熱された熱媒体を浴室暖房器３用の熱媒循環路６から分岐した液々熱交換器用の熱媒循環路１１を介して液々熱交換器１０に供給し、噴霧ヘッド２に供給する水を液々熱交換器１０において熱媒体により加熱できるようにしている。熱媒循環路１１には熱媒弁１２が介設されており、熱媒弁１２の閉弁で液々熱交換器１０への熱媒体の供給が遮断されるようにしている。尚、本実施形態の熱媒弁１２は熱媒体の流量を調節可能な流量調節弁で構成されている。また、熱媒循環路１１には、これに流れる熱媒体の温度を検出する熱媒温度センサ１３が設けられている。   Water is supplied to the spraying head 2 through a spraying channel 9 connected to the water pipe 7 through a check valve 8. A liquid heat exchanger 10 is interposed in the spraying channel 9. Then, the heat medium heated by the heat source device 5 is supplied to the liquid-to-liquid heat exchanger 10 via the heat-medium circulation path 11 for the liquid-to-heat exchanger branched from the heat medium circulation path 6 for the bathroom heater 3. The water supplied to the spray head 2 can be heated by the heat medium in the liquid-liquid heat exchanger 10. A heat medium valve 12 is interposed in the heat medium circulation path 11 so that the supply of the heat medium to the liquid-to-liquid heat exchanger 10 is shut off when the heat medium valve 12 is closed. In addition, the heat medium valve 12 of this embodiment is comprised with the flow volume adjustment valve which can adjust the flow volume of a heat medium. The heat medium circulation path 11 is provided with a heat medium temperature sensor 13 for detecting the temperature of the heat medium flowing through the heat medium circulation path 11.

液々熱交換器１０は、噴霧用流路９の上流側が下、下流側が上に位置するように起立姿勢で配置されている。そして、液々熱交換器１０の上流側の噴霧用流路９の部分に給水弁１４を介設すると共に、液々熱交換器１０の下流側の噴霧流路９の部分に噴霧弁１５を介設し、給水弁１４の閉弁で液々熱交換器１０への給水が遮断され、噴霧弁１５の閉弁で噴霧ヘッド２への給水が遮断されるようにしている。更に、液々熱交換器１０と噴霧弁１５との間の噴霧用流路９の部分に、噴霧用流路９の温度を検出する噴霧温度センサ１６を設け、更に、噴霧温度センサ１６の配置部と噴霧弁１５との間の噴霧用流路９の部分に排水路１７を分岐接続し、この排水路１７に排水弁１８を介設している。   The liquid heat exchanger 10 is arranged in an upright posture so that the upstream side of the spraying channel 9 is located on the lower side and the downstream side is located on the upper side. A water supply valve 14 is interposed in the portion of the spraying flow path 9 upstream of the liquid heat exchanger 10, and the spray valve 15 is provided in the portion of the spray flow path 9 downstream of the liquid heat exchanger 10. The water supply valve 14 is closed so that the water supply to the liquid heat exchanger 10 is shut off, and the spray valve 15 is closed to shut off the water supply to the spray head 2. Further, a spray temperature sensor 16 for detecting the temperature of the spray passage 9 is provided in the portion of the spray passage 9 between the liquid heat exchanger 10 and the spray valve 15. A drainage channel 17 is branched and connected to a portion of the spraying channel 9 between the nozzle and the spray valve 15, and a drainage valve 18 is interposed in the drainage channel 17.

液々熱交換器１０、熱媒弁１２、熱媒温度センサ１３、給水弁１４、噴霧弁１５、噴霧温度センサ１６及び排水弁１８は熱源機５とは別置きの噴霧ユニット１９に内蔵されている。そして、噴霧ユニット１９に設けた噴霧コントローラ２０に熱媒温度センサ１３と噴霧温度センサ１６の検出信号を入力し、この噴霧コントローラ２０により熱媒弁１２、給水弁１４、噴霧弁１５及び排水弁１８を制御するようにしている。尚、噴霧コントローラ２０は、熱源機５用のコントローラ(図示せず)に通信可能に接続されている。また、図外のリモコンが噴霧コントローラ２０に通信可能に接続され、リモコンに設けられたミストスイッチがオンされたときに噴霧コントローラ２０によるミスト運転制御が行われる。   The liquid heat exchanger 10, the heat medium valve 12, the heat medium temperature sensor 13, the water supply valve 14, the spray valve 15, the spray temperature sensor 16 and the drain valve 18 are built in a spray unit 19 separately from the heat source unit 5. Yes. Then, detection signals from the heat medium temperature sensor 13 and the spray temperature sensor 16 are input to the spray controller 20 provided in the spray unit 19, and the heat controller 12, the water supply valve 14, the spray valve 15, and the drain valve 18 are input by the spray controller 20. To control. The spray controller 20 is communicably connected to a controller (not shown) for the heat source unit 5. Further, a remote controller (not shown) is communicably connected to the spray controller 20, and mist operation control by the spray controller 20 is performed when a mist switch provided on the remote controller is turned on.

ミスト運転制御では、先ず、熱源機５に作動指令を送って熱源機５を作動させると共に熱媒弁１２を開弁させ、熱源機５で加熱された熱媒体を熱媒循環路１１を介して液々熱交換器１０に供給する。そして、熱媒温度センサ１３の検出温度が所定の予熱完了温度に上昇したところで給水弁１４と噴霧弁１５とを開弁させる。これにより液々熱交換器１０で加熱された温水が噴霧ヘッド２に供給され、噴霧ヘッド２から温水を噴霧するミスト運転が開始される。ミスト運転中は、噴霧温度センサ１６の検出温度が所定の設定温度に維持されるように、熱媒弁１２により熱媒体の流量を制御する温調制御を行う。ミスト運転の停止時は、熱媒弁１２を閉弁して液々熱交換器１０への熱媒体の供給を停止すると共に、給水弁１４を閉弁して液々熱交換器１０への給水を停止する。次に、排水弁１８を開弁し、排水路１７の分岐部より下流側の噴霧用流路９の部分に残留する水を排水した後、噴霧弁１５と排水弁１８を閉弁する。尚、噴霧弁１５が無くても、給水弁１４の開閉で噴霧ヘッド２からの温水噴霧とその停止とを行うことができるため、噴霧弁１５は省略しても良い。   In the mist operation control, first, an operation command is sent to the heat source device 5 to operate the heat source device 5 and the heat medium valve 12 is opened, and the heat medium heated by the heat source device 5 is passed through the heat medium circuit 11. Supply to the liquid heat exchanger 10. Then, when the temperature detected by the heat medium temperature sensor 13 rises to a predetermined preheating completion temperature, the water supply valve 14 and the spray valve 15 are opened. As a result, the hot water heated by the liquid heat exchanger 10 is supplied to the spray head 2, and the mist operation for spraying the hot water from the spray head 2 is started. During the mist operation, temperature control for controlling the flow rate of the heat medium is performed by the heat medium valve 12 so that the temperature detected by the spray temperature sensor 16 is maintained at a predetermined set temperature. When stopping the mist operation, the heat medium valve 12 is closed to stop the supply of the heat medium to the liquid heat exchanger 10, and the water supply valve 14 is closed to supply water to the liquid heat exchanger 10. To stop. Next, the drain valve 18 is opened, and water remaining in the portion of the spray channel 9 downstream from the branch portion of the drain channel 17 is drained, and then the spray valve 15 and the drain valve 18 are closed. Even if the spray valve 15 is not provided, the spray valve 15 may be omitted because the hot water spray from the spray head 2 can be stopped and stopped by opening and closing the water supply valve 14.

ところで、長期間使用すると、腐食等により液々熱交換器１０の内部漏れを生ずることがある。そこで、噴霧コントローラ２０は、液々熱交換器１０の内部漏れを検査する漏れ検査制御も行うように構成されている。   By the way, if it is used for a long time, internal leakage of the liquid heat exchanger 10 may occur due to corrosion or the like. Therefore, the spray controller 20 is configured to perform leakage inspection control for inspecting the internal leakage of the liquid heat exchanger 10.

漏れ検査制御の詳細は図２に示す通りであり、先ず、Ｓ１のステップで前回の漏れ検査から所定の検査時間間隔(例えば、７２０時間)が経過したか否かを判別し、経過したときにＳ２のステップでミスト運転が行われているか否かを判別する。ミスト運転が行われていないときは、Ｓ３のステップで噴霧温度センサ１６の検出温度Ｔｆが所定の基準温度(例えば、４０℃)以下であるか否かを判別する。   The details of the leak inspection control are as shown in FIG. 2. First, in step S1, it is determined whether or not a predetermined inspection time interval (for example, 720 hours) has elapsed since the previous leak inspection. In step S2, it is determined whether or not a mist operation is being performed. When the mist operation is not performed, it is determined in step S3 whether or not the detected temperature Tf of the spray temperature sensor 16 is equal to or lower than a predetermined reference temperature (for example, 40 ° C.).

Ｔｆが基準温度以下のときは、Ｓ４のステップに進んで検査運転処理を実行する。検査運転処理では、熱源機５に作動指令を送って熱源機５を作動させると共に、熱媒弁１２と排水弁１８とを開弁させる。給水弁１４と噴霧弁１５は閉弁状態に維持される。次に、Ｓ５のステップで検査運転開始時の噴霧温度センサ１６の検出温度Ｔｆを初期水温Ｔｆｓとして記憶した後、Ｓ６のステップで熱媒循環路１１に流れる熱媒体の温度が安定したか否かを判別する。熱媒体の温度は熱源機５での加熱に伴い次第に上昇し、熱源機５における熱媒体の加熱設定温度に上昇したところでほぼ一定になって安定する。Ｓ６のステップでの判別は、熱媒温度センサ１３の検出温度Ｔｎに基づいて行っても良いが、検査運転開始時からある程度時間が経過すると熱媒体の温度が加熱設定温度に上昇して安定するため、検査運転開始時から所定の待ち時間(例えば、３０秒)経過したときに熱媒体の温度が安定したと判定することも可能である。尚、加熱設定温度は、何れの暖房端末も運転されていない時に検査運転が行われた場合や高温暖房端末の運転時に検査運転が行われた場合は比較的高くなり、低温暖房端末の運転時に検査運転が行われた場合は比較的低くなる。   When Tf is equal to or lower than the reference temperature, the process proceeds to step S4 to execute the inspection operation process. In the inspection operation process, an operation command is sent to the heat source unit 5 to operate the heat source unit 5, and the heat medium valve 12 and the drain valve 18 are opened. The water supply valve 14 and the spray valve 15 are maintained in a closed state. Next, after storing the detected temperature Tf of the spray temperature sensor 16 at the start of the inspection operation in step S5 as the initial water temperature Tfs, whether or not the temperature of the heat medium flowing in the heat medium circulation path 11 is stabilized in step S6. Is determined. The temperature of the heat medium gradually rises with heating in the heat source unit 5 and becomes substantially constant and stable when the heat source unit 5 rises to the heating set temperature of the heat medium. The determination in step S6 may be performed based on the detected temperature Tn of the heat medium temperature sensor 13, but after a certain amount of time has elapsed from the start of the inspection operation, the temperature of the heat medium rises to the heating set temperature and becomes stable. Therefore, it is possible to determine that the temperature of the heat medium is stable when a predetermined waiting time (for example, 30 seconds) has elapsed since the start of the inspection operation. The heating set temperature is relatively high when an inspection operation is performed when no heating terminal is in operation or when an inspection operation is performed during operation of a high-temperature heating terminal. When inspection operation is performed, it becomes relatively low.

熱媒体の温度が安定したと判定されたときは、Ｓ７のステップに進み、その時点での熱媒温度センサ１３の検出温度Ｔｎと上記初期水温Ｔｆｓとの差の３分の１を第２の判定値ＹＴ２として設定する。次に、Ｓ８のステップに進み、その時点での噴霧温度センサ１６の検出温度Ｔｆの検査運転開始時からの上昇量(＝Ｔｆ−Ｔｆｓ)が所定の固定値に設定される第１の判定値ＹＴ１以上になったか否かを判別する。Ｔｆ−Ｔｆｓ＜ＹＴ１であれば、Ｓ９のステップでＴｆ−Ｔｆｓが第２判定値ＹＴ２以上になったか否かを判別する。Ｔｆ−Ｔｆｓ＜ＹＴ２であれば、Ｓ１０のステップで検査運転開始時から所定の検査時間(例えば、３分)が経過したか否かを判別し、検査時間が経過するまではＳ８のステップからＳ１０のステップまでの処理を繰り返す。   When it is determined that the temperature of the heat medium has become stable, the process proceeds to step S7, and one third of the difference between the detected temperature Tn of the heat medium temperature sensor 13 and the initial water temperature Tfs at that time is set to the second value. Set as determination value YT2. Next, the process proceeds to step S8, and the first determination value in which the amount of increase (= Tf−Tfs) from the start of the inspection operation of the detected temperature Tf of the spray temperature sensor 16 at that time is set to a predetermined fixed value. It is determined whether or not YT1 or more. If Tf−Tfs <YT1, it is determined in step S9 whether or not Tf−Tfs is equal to or greater than the second determination value YT2. If Tf−Tfs <YT2, it is determined in step S10 whether or not a predetermined inspection time (for example, 3 minutes) has elapsed since the start of the inspection operation, and from step S8 to step S10 until the inspection time elapses. Repeat the process up to step.

そして、Ｔｆ−Ｔｆｓが第１と第２の各判定値ＹＴ１，ＹＴ２以上になることなく検査時間が経過したときは、Ｓ１１のステップで液々熱交換器１０の内部漏れ無しと判断すると共に、Ｓ１２のステップで熱源機５に作動停止指令を送ると共に熱媒弁１２及び排水弁１８を閉弁させる検査運転の終了処理を行った後、Ｓ１のステップに戻り次回の検査に備える。   When the inspection time has passed without Tf-Tfs being equal to or greater than the first and second determination values YT1, YT2, it is determined in step S11 that there is no internal leakage of the liquid-liquid heat exchanger 10, and In step S12, an operation stop command is sent to the heat source unit 5, and after completion of the inspection operation for closing the heat medium valve 12 and the drain valve 18, the process returns to step S1 to prepare for the next inspection.

一方、検査時間が経過する前に、Ｔｆ−Ｔｆｓが第１の判定値ＹＴ１または第２の判定値ＹＴ２以上になったときは、Ｓ１３のステップで液々熱交換器１０の内部漏れ有りと判断すると共に、Ｓ１４のステップで異常処理を行う。異常処理では、リモコンで異常の発生を報知すると共に、以後のミスト運転を禁止する。   On the other hand, if Tf−Tfs becomes equal to or higher than the first determination value YT1 or the second determination value YT2 before the inspection time elapses, it is determined in step S13 that there is an internal leak in the liquid heat exchanger 10. In addition, abnormality processing is performed in step S14. In the abnormality process, the occurrence of abnormality is notified by the remote controller and the subsequent mist operation is prohibited.

ここで、検査運転時には、給水弁１４が開弁されないため、噴霧用流路９の液々熱交換器１０内の流路部分に水圧が作用しない。従って、液々熱交換器１０の内部漏れが有ると、検査運転時に熱媒弁１２の開弁により液々熱交換器１０内の熱媒循環路１１の部分に液圧が作用したところで噴霧用流路９に熱媒体が混入する。噴霧温度センサ１６の検出温度Ｔｆは、液々熱交換器１０の内部漏れが無い正常時でも液々熱交換器１０から配管及び残留水を介して伝達される熱媒体の熱により上昇するが、内部漏れにより噴霧用流路９に熱媒体が混入すると、混入した熱媒体の熱影響でＴｆが正常時に比し速く上昇する。特に、本実施形態では、検査運転時に排水弁１８が開弁されるため、噴霧用流路９に熱媒体が混入した場合、混入した熱媒体が噴霧温度センサ１６の配置部を経由して排水路１８に流れるようになる。従って、噴霧温度センサ１６の検出温度Ｔｆの上昇速度がより速くなる。そして、噴霧用流路９に熱媒体が混入すると、噴霧温度センサ１６の検出温度Ｔｆの検査運転開始時からの上昇量が検査時間内に第１や第２の判定値ＹＴ１，ＹＴ２以上になり、上記の如く内部漏れ有りと判定される。   Here, during the inspection operation, the water supply valve 14 is not opened, so that the water pressure does not act on the flow passage portion in the liquid heat exchanger 10 of the spray flow passage 9. Therefore, if there is an internal leak in the liquid-to-liquid heat exchanger 10, when the hydraulic pressure acts on the portion of the heat medium circulation path 11 in the liquid-to-liquid heat exchanger 10 due to the opening of the heat medium valve 12 during the inspection operation, it is for spraying. A heat medium is mixed into the flow path 9. The detected temperature Tf of the spray temperature sensor 16 rises due to the heat of the heat medium transmitted from the liquid heat exchanger 10 through the piping and residual water even when there is no internal leakage of the liquid heat exchanger 10 and is normal. When the heat medium is mixed into the spray flow path 9 due to internal leakage, Tf rises faster than normal when the heat effect of the mixed heat medium is present. In particular, in the present embodiment, since the drain valve 18 is opened during the inspection operation, when a heat medium is mixed into the spray passage 9, the mixed heat medium is drained via the arrangement portion of the spray temperature sensor 16. It will flow to the road 18. Therefore, the rising speed of the detected temperature Tf of the spray temperature sensor 16 becomes faster. When the heat medium is mixed into the spray passage 9, the amount of increase in the temperature Tf detected by the spray temperature sensor 16 from the start of the inspection operation becomes equal to or higher than the first and second determination values YT1 and YT2 within the inspection time. As described above, it is determined that there is an internal leak.

尚、液々熱交換器１０における熱交換量は熱媒循環路１１に流れる熱媒体の温度と噴霧用流路９の液々熱交換器１０内の流路部分に残留する水の温度との温度差に応じて変化する。そして、残留水の初期水温が低いほど又熱媒体の温度が高いほどその後の噴霧温度センサ１６の検出温度Ｔｆの上昇速度が速くなり、正常時における検査時間内の温度上昇量も大きくなる。従って、固定値である第１判定値ＹＴ１は、初期水温が低く、且つ、熱媒体の温度高い場合における正常時の温度上昇量を考慮して比較的大きな値(例えば、１５℃)に設定する必要がある。その結果、初期水温が高い場合や熱媒体の温度が低い場合には、噴霧用流路９への熱媒体の混入を生じても、噴霧温度センサ１６の検出温度Ｔｆの検査時間内の上昇量が第１判定値ＹＴ１以上にならないことがある。   The amount of heat exchange in the liquid heat exchanger 10 is the temperature of the heat medium flowing in the heat medium circulation path 11 and the temperature of the water remaining in the flow path portion in the liquid heat exchanger 10 of the spray flow path 9. Varies with temperature difference. Then, the lower the initial water temperature of the residual water and the higher the temperature of the heat medium, the higher the subsequent increase rate of the detection temperature Tf of the spray temperature sensor 16 and the larger the temperature increase amount during the normal inspection time. Accordingly, the first determination value YT1, which is a fixed value, is set to a relatively large value (for example, 15 ° C.) in consideration of the normal temperature rise when the initial water temperature is low and the temperature of the heat medium is high. There is a need. As a result, when the initial water temperature is high or the temperature of the heat medium is low, the amount of increase within the inspection time of the detection temperature Tf of the spray temperature sensor 16 even if the heat medium is mixed into the spray channel 9. May not be greater than or equal to the first determination value YT1.

そのため、本実施形態では、判定値として第１判定値ＹＴ１に加え、熱媒体の温度が安定した時の熱媒温度センサ１３の検出温度Ｔｎと初期水温Ｔｆｓとの差に応じて可変設定される第２判定値ＹＴ２を用意している。ここで、熱媒温度センサ１３の検出温度Ｔｎと初期水温Ｔｆｓとの差は液々熱交換器１０での熱交換量、即ち、正常時における噴霧温度センサ１６の検出温度Ｔｆの上昇量に密接に関係する。そして、正常時における噴霧温度センサ１６の検出温度Ｔｆの検査時間内の上昇量の上限より若干大きくなるように熱媒温度センサ１３の検出温度Ｔｎと初期水温Ｔｆｓとの差に応じて第２判定値ＹＴ２を設定することができる。尚、本実施形態では、熱媒温度センサ１３の検出温度Ｔｎと初期水温Ｔｆｓとの差を「３」で除した値を第２判定値ＹＴ２としているが、除数は液々熱交換器１０の種類や検査時間の長さによって変わる。何れにしても、第２判定値ＹＴ２は初期水温Ｔｆｓが高いほど又熱媒体の温度が低いほど小さくなる。例えば、Ｔｎ＝７０℃、Ｔｆｓ＝４０℃の場合、本実施形態ではＹＴ２＝１０℃になる。従って、初期水温が高い場合や熱媒体の温度が低い場合でも、噴霧用流路９への熱媒体の混入を生じたときは噴霧温度センサ１６の検出温度Ｔｆの検査時間内の上昇量が第２判定値ＹＴ２以上になり、内部漏れ有りと正確に判定される。   Therefore, in the present embodiment, in addition to the first determination value YT1 as the determination value, it is variably set according to the difference between the detected temperature Tn of the heat medium temperature sensor 13 and the initial water temperature Tfs when the temperature of the heat medium is stabilized. A second determination value YT2 is prepared. Here, the difference between the detected temperature Tn of the heat medium temperature sensor 13 and the initial water temperature Tfs is closely related to the amount of heat exchange in the liquid heat exchanger 10, that is, the amount of increase in the detected temperature Tf of the spray temperature sensor 16 at normal time. Related to. Then, the second determination is made according to the difference between the detected temperature Tn of the heating medium temperature sensor 13 and the initial water temperature Tfs so that it is slightly larger than the upper limit of the amount of increase in the inspection temperature Tf of the spray temperature sensor 16 in the normal time. The value YT2 can be set. In the present embodiment, a value obtained by dividing the difference between the detected temperature Tn of the heat medium temperature sensor 13 and the initial water temperature Tfs by “3” is set as the second determination value YT2, but the divisor is the value of the liquid heat exchanger 10. It depends on the type and length of inspection time. In any case, the second determination value YT2 becomes smaller as the initial water temperature Tfs is higher and the temperature of the heat medium is lower. For example, when Tn = 70 ° C. and Tfs = 40 ° C., YT2 = 10 ° C. in this embodiment. Therefore, even when the initial water temperature is high or the temperature of the heat medium is low, when the heat medium is mixed into the spray channel 9, the amount of increase within the inspection time of the detection temperature Tf of the spray temperature sensor 16 is the first amount. 2 It becomes more than judgment value YT2, and it is judged correctly that there is internal leakage.

但し、初期水温Ｔｆｓが低い場合や熱媒体の温度が高い場合、例えば、Ｔｎ＝８５℃、Ｔｆｓ＝１０℃の場合にはＹＴ２が３５℃と過大になる。従って、初期水温が低い場合や熱媒体の温度が高い場合には、噴霧用流路９への熱媒体の混入を生じても、噴霧温度センサ１６の検出温度Ｔｆの検査時間内の上昇量が第２判定値ＹＴ２以上にならない可能性がある。そのため、判定値として第１判定値ＹＴ１と第２判定値ＹＴ２とを併用することが望ましい。   However, when the initial water temperature Tfs is low or the temperature of the heat medium is high, for example, when Tn = 85 ° C. and Tfs = 10 ° C., YT2 is excessively high at 35 ° C. Therefore, when the initial water temperature is low or the temperature of the heat medium is high, the amount of increase in the inspection temperature Tf detected by the spray temperature sensor 16 within the inspection time is increased even if the heat medium is mixed into the spray passage 9. The second determination value YT2 may not be exceeded. Therefore, it is desirable to use both the first determination value YT1 and the second determination value YT2 as determination values.

尚、上記実施形態では、Ｔｆｓを検査運転開始時の噴霧温度センサ１６の検出温度Ｔｆとしているが、熱媒循環路１１に流れる熱媒体の温度が安定した時の噴霧温度センサ１６の検出温度ＴｆをＴｆｓとして、Ｓ８，Ｓ９のステップでの判別処理を行うことも可能である。   In the above embodiment, Tfs is the detected temperature Tf of the spray temperature sensor 16 at the start of the inspection operation, but the detected temperature Tf of the spray temperature sensor 16 when the temperature of the heat medium flowing through the heat medium circulation path 11 is stabilized. It is also possible to perform the discrimination process in steps S8 and S9 with Tfs.

また、ミスト運転の停止直後等で検査運転開始時の噴霧温度センサ１６の検出温度Ｔｆがかなり高い場合には、検査運転中に噴霧用流路９に熱媒体が混入しても、噴霧温度センサ１６の検出温度Ｔｆは然程上昇せず、誤判定を生じ易くなる。そこで、上記実施形態では、Ｓ３のステップにおいて噴霧温度センサ１６の検出温度Ｔｆと基準温度とを比較し、Ｔｆが基準温度を上回っているときはＳ４以下のステップに進んで漏れ検査を実行することを禁止している。これにより、誤判定が未然に防止される。   Further, when the detected temperature Tf of the spray temperature sensor 16 at the start of the inspection operation is quite high immediately after the stop of the mist operation or the like, even if a heat medium is mixed into the spray passage 9 during the inspection operation, the spray temperature sensor The detected temperature Tf of 16 does not rise so much, and erroneous determination is likely to occur. Therefore, in the above embodiment, the detected temperature Tf of the spray temperature sensor 16 is compared with the reference temperature in the step of S3, and when Tf exceeds the reference temperature, the process proceeds to the steps after S4 and the leak inspection is executed. Is prohibited. Thereby, erroneous determination is prevented in advance.

以上、本発明の実施形態について図面を参照して説明したが、本発明はこれに限らない。例えば、上記実施形態では、Ｓ２のステップでミスト運転が行われているか否かを判別しているが、Ｓ２のステップでミストスイッチがオンされたか否かを判別し、オンされたときに、Ｓ３以下のステップに進むようにしても良い。ミストスイッチがオンされたときは、通常、給水弁１４、噴霧弁１５及び排水弁１８を閉弁したまま、熱源機５に作動指令を送って熱源機５を作動させると共に熱媒弁１２を開弁させる予熱運転を行い、熱媒温度センサ１３の検出温度が所定の予熱完了温度に上昇したところで、給水弁１４及び噴霧弁１５を開弁してミスト運転を開始する。そして、上記制御によれば、ミストスイッチがオンされてからミスト運転が開始されるまでの間の「ミスト運転が行われていない時」に予熱運転に代えて検査運転が行われることになる。尚、この場合には、Ｓ１１のステップで内部漏れ無しと判断されたとき、Ｓ１２のステップで排水弁１８を閉弁すると共に給水弁１４及び噴霧弁１５を開弁して、ミスト運転を開始する。   As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to this. For example, in the above embodiment, it is determined whether or not the mist operation is performed in step S2, but it is determined whether or not the mist switch is turned on in step S2. You may make it progress to the following steps. When the mist switch is turned on, normally, with the water supply valve 14, the spray valve 15 and the drain valve 18 closed, an operation command is sent to the heat source unit 5 to operate the heat source unit 5 and the heat medium valve 12 is opened. A preheating operation is performed, and when the temperature detected by the heat medium temperature sensor 13 rises to a predetermined preheating completion temperature, the water supply valve 14 and the spray valve 15 are opened to start the mist operation. According to the above control, the inspection operation is performed instead of the preheating operation when “the mist operation is not performed” after the mist switch is turned on until the mist operation is started. In this case, when it is determined that there is no internal leakage in step S11, the drain valve 18 is closed and the water supply valve 14 and the spray valve 15 are opened in step S12, and the mist operation is started. .

また、上記実施形態では、検査運転時に排水弁１８を開弁しているが、排水弁１８は閉弁したままでも良い。但し、排水弁１８を開弁すれば、液々熱交換器１０の内部漏れにより噴霧用流路９に混入した熱媒体が上記の如く噴霧温度センサ１６の配置部を経由して排水路１７に流れるため、噴霧温度センサ１６の検出温度Ｔｆの上昇量が排水弁１８を閉弁状態に維持する場合より大きくなり、検査精度が向上する。   Moreover, in the said embodiment, although the drain valve 18 is opened at the time of test | inspection operation, the drain valve 18 may remain closed. However, if the drain valve 18 is opened, the heat medium mixed in the spray channel 9 due to the internal leakage of the liquid heat exchanger 10 passes into the drain channel 17 via the arrangement portion of the spray temperature sensor 16 as described above. Therefore, the amount of increase in the detected temperature Tf of the spray temperature sensor 16 becomes larger than when the drain valve 18 is maintained in the closed state, and the inspection accuracy is improved.

また、上記実施形態では、液々熱交換器１０の内部漏れによる噴霧用流路９への熱媒体の混入に起因して変化する状態量として、噴霧温度センサ１６で検出される液々熱交換器１０の下流側の噴霧用流路９の部分の温度を用い、この温度の変化に基づいて液々熱交換器１０の内部漏れの有無を判別しているが、これに限らない。例えば、検査運転時に排水弁１８を閉じたまま噴霧弁１５を開弁すると、給水弁１４から排水路１７の分岐部までの噴霧用流路９の部分にミスト運転停止時の排水後にも残留する残留水の水位が噴霧用流路９への熱媒体の混入で排水路１７の分岐部より高い位置まで上昇する。また、検査運転時に排水弁１８を開弁させれば、排水路１７の分岐部上流側の噴霧用流路９の部分に残留する水が噴霧用流路９への熱媒体の混入で排水路１７に押し出されて、排水路１７に水が流れる。従って、液々熱交換器１０の内部漏れによる噴霧用流路９への熱媒体の混入に起因して変化する状態量として噴霧用流路９の水位や排水路１７の水流を用い、これら水位や水流の変化に基づいて内部漏れの有無を判別することも可能である。但し、この場合には、水位センサや水流スイッチといった漏れ検査専用の検出手段を設ける必要がある。これに対し、上記実施形態では、ミスト運転時の温調制御のために設ける噴霧温度センサ１６を漏れ検査用の検出手段に兼用できるため、コスト的に有利である。   Further, in the above embodiment, the liquid-liquid heat exchange detected by the spray temperature sensor 16 as the state quantity that changes due to the mixing of the heat medium into the spray passage 9 due to the internal leakage of the liquid-heat exchanger 10. Although the temperature of the portion of the spray channel 9 on the downstream side of the vessel 10 is used and the presence or absence of internal leakage of the liquid-to-liquid heat exchanger 10 is determined based on the change in this temperature, this is not restrictive. For example, if the spray valve 15 is opened while the drain valve 18 is closed during the inspection operation, it remains in the portion of the spray channel 9 from the water supply valve 14 to the branch of the drain channel 17 after draining when the mist operation is stopped. The residual water level rises to a position higher than the branch portion of the drainage channel 17 due to the mixing of the heat medium into the spraying channel 9. Further, if the drain valve 18 is opened during the inspection operation, the water remaining in the spray channel 9 on the upstream side of the branching portion of the drain channel 17 is mixed with the heat medium into the spray channel 9 and the drain channel. The water flows into the drainage channel 17 by being pushed out by 17. Accordingly, the water level of the spraying channel 9 and the water flow of the drainage channel 17 are used as state quantities that change due to the mixing of the heat medium into the spraying channel 9 due to the internal leakage of the liquid heat exchanger 10. It is also possible to determine the presence or absence of internal leakage based on changes in water flow. However, in this case, it is necessary to provide detection means dedicated to leak inspection, such as a water level sensor and a water flow switch. On the other hand, in the said embodiment, since the spray temperature sensor 16 provided for the temperature control at the time of mist driving | operation can be combined with the detection means for a leak test | inspection, it is advantageous in cost.

また、上記実施形態では、熱媒弁１２を流量調節弁で構成し、ミスト運転時に熱媒弁１２による熱媒体の流量調節で噴霧温度センサ１６の検出温度を設定温度に維持するための温調制御を行っているが、熱媒弁１２を開閉弁で構成すると共に給水弁１４を流量調節弁で構成し、ミスト運転時に給水弁１４による通水量の調節で温調制御を行うことも可能である。   Moreover, in the said embodiment, the heat-medium valve 12 is comprised with a flow control valve, and the temperature control for maintaining the detection temperature of the spray temperature sensor 16 by setting the heat-medium flow rate by the heat-medium valve 12 at the time of mist operation at a preset temperature. Although the control is performed, the heat medium valve 12 is configured with an on-off valve and the water supply valve 14 is configured with a flow rate control valve, and temperature control can be performed by adjusting the amount of water flow through the water supply valve 14 during mist operation. is there.

本発明の実施形態のミストサウナ装置の全体構成を示す説明図。Explanatory drawing which shows the whole structure of the mist sauna apparatus of embodiment of this invention. 実施形態のミストサウナ装置で実行する漏れ検査制御の内容を示すフロー図。The flowchart which shows the content of the leak test control performed with the mist sauna apparatus of embodiment.

符号の説明Explanation of symbols

１…浴室、２…噴霧ヘッド、５…熱源機、９…噴霧用流路、１０…液々熱交換器、１１…熱媒循環路、１２…熱媒弁、１３…熱媒温度センサ、１４…給水弁、１６…噴霧温度センサ、１７…排水路、１８…排水弁、２０…噴霧コントローラ。   DESCRIPTION OF SYMBOLS 1 ... Bathroom 2 ... Spray head, 5 ... Heat source machine, 9 ... Spray path, 10 ... Liquid heat exchanger, 11 ... Heat-medium circulation path, 12 ... Heat-medium valve, 13 ... Heat-medium temperature sensor, 14 DESCRIPTION OF SYMBOLS ... Water supply valve, 16 ... Spray temperature sensor, 17 ... Drainage channel, 18 ... Drain valve, 20 ... Spray controller.

Claims (5)

熱源機と、浴室に配置した噴霧ヘッドと、噴霧ヘッドに連なる噴霧用流路に介設した液々熱交換器とを備え、噴霧ヘッドに供給する水を熱源機から熱媒循環路を介して液々熱交換器に供給する熱媒体により加熱し、噴霧ヘッドから温水を噴霧させるミスト運転を行うようにしたミストサウナ装置であって、液々熱交換器の上流側の噴霧用流路の部分に介設した、閉弁で液々熱交換器への給水を遮断する給水弁と、熱媒循環路に介設した、閉弁で液々熱交換器への熱媒体の供給を遮断する熱媒弁と、熱媒循環路に流れる熱媒体の温度を検出する熱媒温度センサとを備えるものにおいて、
液々熱交換器の内部漏れを検査する漏れ検査手段が設けられ、漏れ検査手段は、ミスト運転が行われていない時に給水弁を閉弁したまま熱源機を作動させると共に熱媒弁を開弁させて検査運転を行う運転制御手段と、検査運転時に液々熱交換器の内部漏れによる噴霧用流路への熱媒体の混入に起因して変化する状態量を検出する検出手段と、検出手段の検出結果に基づいて内部漏れの有無を判別する判別手段とを備え、
前記検出手段は、液々熱交換器の下流側の噴霧用流路の部分の温度を前記状態量として検出する噴霧温度センサで構成され、
前記判別手段は、噴霧温度センサの検出温度の所定時期からの上昇量が所定の検査時間内に所定の判定値以上になった場合に内部漏れ有りと判別するように構成され、
前記判定値は、熱媒循環路に流れる熱媒体の温度が安定した時の熱媒温度センサの検出温度と前記所定時期の噴霧温度センサの検出温度との差に応じて可変設定されることを特徴とするミストサウナ装置。 A heat source device, a spray head arranged in a bathroom, and a liquid heat exchanger interposed in a spray channel connected to the spray head, and water supplied to the spray head from the heat source device via a heat medium circulation path A mist sauna device that is heated by a heat medium supplied to a liquid-to-liquid heat exchanger and sprays hot water from a spray head, and is a part of a spray channel upstream of the liquid-to-liquid heat exchanger A water supply valve that shuts off the water supply to the liquid-to-liquid heat exchanger when closed and a heat supply valve that shuts off the supply of the heat medium to the liquid-to-liquid heat exchanger when closed via the heating medium circulation path In what has a medium valve and a heat medium temperature sensor for detecting the temperature of the heat medium flowing in the heat medium circuit ,
Leakage inspection means for inspecting internal leakage of the liquid heat exchanger is provided, and the leakage inspection means operates the heat source device with the water supply valve closed and opens the heat medium valve when the mist operation is not performed. An operation control means for performing an inspection operation, a detection means for detecting a state quantity that changes due to the mixing of the heat medium into the spraying channel due to an internal leakage of the liquid heat exchanger during the inspection operation, and a detection means and a discriminating means for discriminating the presence or absence of internal leakage based on the detection result,
The detection means comprises a spray temperature sensor that detects the temperature of the portion of the spray channel downstream of the liquid-to-liquid heat exchanger as the state quantity,
The determination means is configured to determine that there is an internal leak when the amount of increase from a predetermined time of the detection temperature of the spray temperature sensor becomes equal to or greater than a predetermined determination value within a predetermined inspection time,
The determination value, the Rukoto is variably set in accordance with the difference between the detected temperature of the detected temperature and the spray temperature sensor of the predetermined period of heat medium temperature sensor when the temperature of the heat medium flowing through the heat medium circulation path is stabilized A featured mist sauna device. 前記所定時期は検査運転の開始時であることを特徴とする請求項１記載のミストサウナ装置。 Wherein the predetermined timing is a mist sauna apparatus according to claim 1, characterized in that at the start of the inspection operation. 前記所定時期は、前記熱媒循環路に流れる熱媒体の温度が安定した時であることを特徴とする請求項１記載のミストサウナ装置。 Wherein the predetermined timing is a mist sauna apparatus according to claim 1, wherein the temperature of the heat medium flowing through the heating medium circulation path, characterized in that when the stable. 前記噴霧温度センサの配置部の下流側の前記噴霧用流路の部分に、排水弁を介設した排水路が分岐接続され、前記検査運転時に排水弁が開弁されることを特徴とする請求項１〜３の何れか１項に記載のミストサウナ装置。 A drainage passage having a drainage valve is branched and connected to a portion of the spraying channel downstream of the spray temperature sensor arrangement portion, and the drainage valve is opened during the inspection operation. Item 4. The mist sauna device according to any one of Items 1 to 3 . 前記漏れ検査手段による漏れ検査を実行する前に前記噴霧温度センサで検出された温度が所定の基準温度を上回っているときは漏れ検査の実行を禁止する禁止手段を備えることを特徴とする請求項１〜４の何れか１項に記載のミストサウナ装置。 The apparatus further comprises prohibiting means for prohibiting execution of leak inspection when a temperature detected by the spray temperature sensor is higher than a predetermined reference temperature before performing leak inspection by the leak inspection means. The mist sauna apparatus of any one of 1-4 .
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JP5005739B2 (en) * 2009-08-07 2012-08-22 リンナイ株式会社 Mist sauna equipment
JP5241662B2 (en) * 2009-09-14 2013-07-17 リンナイ株式会社 Mist generator
JP5522441B2 (en) * 2009-10-29 2014-06-18 株式会社ノーリツ Bathroom heating device with mist function and on-off valve failure determination method
CN102146696B (en) * 2011-03-24 2012-11-21 上海亚虹塑料模具制造有限公司 Method for judging closing of water stop valve of intelligent toilet
JP6006164B2 (en) * 2013-05-15 2016-10-12 株式会社コロナ Mist generator
JP5964871B2 (en) * 2014-02-04 2016-08-03 リンナイ株式会社 Mist sauna equipment

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