JP6391521B2 - Hot water system - Google Patents
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- JP6391521B2 JP6391521B2 JP2015069841A JP2015069841A JP6391521B2 JP 6391521 B2 JP6391521 B2 JP 6391521B2 JP 2015069841 A JP2015069841 A JP 2015069841A JP 2015069841 A JP2015069841 A JP 2015069841A JP 6391521 B2 JP6391521 B2 JP 6391521B2
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Description
本発明は、貯湯タンクを有する給湯システムに関する。 The present invention relates to a hot water supply system having a hot water storage tank.
貯湯タンクと、該貯湯タンク内の湯水を加熱するヒートポンプ等の熱源機と、貯湯タンクに接続された給水路及び給湯路と、給水路を、貯湯タンクをバイパスさせて(貯湯タンクを経由させずに)給湯路に接続するバイパス給水路と、給湯路とバイパス給水路との接続箇所に貯湯タンクから流入する湯水とバイパス給水路から流入する水との混合割合を可変的に制御可能に構成された混合割合調整弁とを備える給湯システムが従来より知られている(例えば特許文献1、2を参照)。 A hot water storage tank, a heat source device such as a heat pump for heating hot water in the hot water storage tank, a water supply path and a hot water supply path connected to the hot water storage tank, and a water supply path are bypassed from the hot water storage tank (without passing through the hot water storage tank). Ii) It is configured to be able to variably control the mixing ratio of the hot water flowing from the hot water storage tank and the water flowing from the bypass water supply path to the bypass water supply path connected to the hot water supply path, and the connection point between the hot water supply path and the bypass water supply path. Conventionally, a hot water supply system including a mixing ratio adjusting valve is known (see, for example, Patent Documents 1 and 2).
この種の給湯システムでは、貯湯タンク内に、加熱された湯が十分に貯まっている状態では、前記混合割合調整弁を制御する(ひいては上記混合割合を調整する)ことで、前記給湯路とバイパス給水路との接続箇所から給湯路の下流側に流れる湯水の温度(給湯温度)を所要の目標温度に制御することが行われる。 In this type of hot water supply system, when the heated hot water is sufficiently stored in the hot water storage tank, the mixing rate adjusting valve is controlled (and thus the mixing rate is adjusted) so that the hot water supply channel and the bypass are bypassed. Control of the temperature (hot water supply temperature) of the hot water flowing from the connection point with the water supply channel to the downstream side of the hot water supply channel is performed to a required target temperature.
また、この種の給湯システムでは、上記特許文献1、2に見られる如く、通常、上記バイパス給水路には、該バイパス給水路での水の逆流を防止する逆止弁が設けられている。 In this type of hot water supply system, as can be seen in Patent Documents 1 and 2, normally, the bypass water supply path is provided with a check valve for preventing a back flow of water in the bypass water supply path.
なお、本明細書では、「湯水」は、加熱されて昇温した水(湯)又は非加熱状態の水又はこれらの混合水を意味する。 In the present specification, “hot water” means heated water (hot water), unheated water, or a mixed water thereof.
前記特許文献1、2に見られる給湯システムでは、前記バイパス給水路に設けられている逆止弁が1つである。このため、該逆止弁が閉弁状態に維持されてしまうような故障が発生した場合には、給水路及び給湯路の通水を遮断しない限り、貯湯タンク内の加熱された湯水が、給水路側の水と混合されることなく、給湯路の下流側に流れることとなってしまう。 In the hot water supply systems found in Patent Documents 1 and 2, there is one check valve provided in the bypass water supply channel. For this reason, in the event of a failure that keeps the check valve in the closed state, the heated hot water in the hot water storage tank is supplied to the water supply unless the water supply passage and the hot water supply passage are blocked. It will flow to the downstream side of the hot water supply path without being mixed with the water on the road side.
これを防止するためには、例えば、バイパス給水路に、並列接続された2つの通水路を備えておき、それらの通水路のそれぞれに逆止弁を設けることが考えられる。このようにすることで、いずれか1つの逆止弁の故障が発生しても、貯湯タンク内の加熱された湯水が、給水路側の水と混合されなくなるのを防止することができる。 In order to prevent this, for example, it is conceivable that two water passages connected in parallel are provided in the bypass water supply passage, and a check valve is provided in each of the water passages. By doing in this way, even if the failure of any one check valve occurs, it is possible to prevent the hot water in the hot water storage tank from being mixed with the water on the water supply channel side.
ただし、この場合であっても、さらに残りの逆止弁までもが故障してしまうと、貯湯タンク内の加熱された湯水が、給水路側の水と混合されることなく、給湯路の下流側に流れることとなってしまう。 However, even in this case, if even the remaining check valve breaks down, the heated hot water in the hot water storage tank is not mixed with the water on the water supply channel side, and the downstream side of the hot water supply channel. Will end up flowing.
従って、上記の如くバイパス給水路の2つの通水路のそれぞれの逆止弁を設けた場合であっても、いずれかの逆止弁の故障が発生した場合には、それを検知して、適切な対処を行うことが望まれる。 Therefore, even when a check valve is provided for each of the two water passages of the bypass water supply channel as described above, if any check valve failure occurs, it is detected and It is desirable to take appropriate measures.
本発明はかかる背景に鑑みてなされたものであり、バイパス給水路の逆止弁の故障によって、貯湯タンク内の加熱された湯水に給水路側の水を混合させることができなくなるのを極力防止することができると共に、該逆止弁の故障を適切に検知して、該検知に応じた処置を実行できる給湯システムを提供することを目的とする。 The present invention has been made in view of such a background, and prevents the water on the water supply channel side from being mixed with the heated hot water in the hot water storage tank as much as possible due to the failure of the check valve of the bypass water supply channel. Another object of the present invention is to provide a hot water supply system capable of appropriately detecting a failure of the check valve and performing a treatment corresponding to the detection.
本発明の給湯システムは、かかる目的を達成するために、貯湯タンクと、該貯湯タンク内の湯水を加熱する第1熱源機と、前記貯湯タンクに接続された給水路及び給湯路と、前記給水路を前記貯湯タンクをバイパスさせて前記給湯路に接続するバイパス給水路と、前記給湯路と前記バイパス給水路との接続箇所に前記貯湯タンクから流入する湯水と前記バイパス給水路から流入する水との混合割合を可変的に制御可能に構成された混合割合調整弁と、前記バイパス給水路での水の逆流を防止するように該バイパス給水路に設けられた逆止弁と、前記接続箇所の下流側で前記給湯路を流れる湯水の温度を制御するための制御処理として、少なくとも前記混合割合調整弁を制御する処理を実行可能に構成された温調制御手段とを備える給湯システムであって、
前記バイパス給水路は、前記給水路と給湯路との間で互いに並列に接続された2つの通水路を備えており、
前記逆止弁は、前記バイパス給水路の2つの通水路のそれぞれに設けられており、
前記接続箇所に前記貯湯タンクから流入する湯水の流量である第1流量と、前記接続箇所に前記バイパス給水路から流入する水の流量である第2流量と、前記接続箇所から前記給湯路の下流側に流れる湯水の流量である第3流量とのうちの少なくとも2つの流量を検出する流量検出手段と、
前記混合割合調整弁があらかじめ定められた所定の動作状態に制御されているという条件を少なくとも満たす特定状態で前記給水路及び給湯路の通水が行われる運転中に前記流量検出手段により得られた2つの流量の検出値に基づいて、前記バイパス給水路に設けられた逆止弁のうちのいずれかの逆止弁の故障の発生の有無を検知する故障検知手段と、
該故障検知手段により前記いずれかの逆止弁の故障の発生が検知された場合に、あらかじめ定められた異常対応処理を実行する異常対応処理手段とを備えることを特徴とする(第1発明)。
In order to achieve this object, the hot water supply system of the present invention has a hot water storage tank, a first heat source device for heating hot water in the hot water storage tank, a water supply path and a hot water supply path connected to the hot water storage tank, and the water supply. A bypass water supply path that bypasses the hot water storage tank and connects to the hot water supply path; hot water that flows from the hot water storage tank to the connection point between the hot water supply path and the bypass water supply path; and water that flows from the bypass water supply path A mixing rate adjusting valve configured to be variably controllable, a check valve provided in the bypass water channel so as to prevent a back flow of water in the bypass water channel, As a control process for controlling the temperature of the hot water flowing through the hot water supply path on the downstream side, at least a temperature control control means configured to execute a process for controlling the mixing ratio adjusting valve is provided. There is,
The bypass water supply path includes two water flow paths connected in parallel between the water supply path and the hot water supply path,
The check valve is provided in each of the two water passages of the bypass water supply passage,
A first flow rate that is a flow rate of hot water flowing into the connection location from the hot water storage tank, a second flow rate that is a flow rate of water flowing from the bypass water supply channel to the connection location, and a downstream of the hot water supply channel from the connection location. Flow rate detection means for detecting at least two of the third flow rates, which are flow rates of hot water flowing to the side,
Obtained by the flow rate detection means during the operation in which the water supply passage and the hot water supply passage are conducted in a specific state satisfying at least the condition that the mixing ratio adjusting valve is controlled to a predetermined predetermined operation state. A failure detection means for detecting the presence or absence of failure of any one of the check valves provided in the bypass water supply path, based on two flow rate detection values;
An abnormality response processing means for executing a predetermined abnormality response process when the failure detection means detects the occurrence of a failure of any one of the check valves (first invention). .
かかる第1発明によれば、前記バイパス給水路の2つの通水路のそれぞれに前記逆止弁が設けられている。このため、いずれか1つの逆止弁が閉弁状態に保持される故障が発生しても、他の逆止弁が正常である限り、前記接続箇所にバイパス給水路から給水することができる。ひいては、該接続箇所に貯湯タンクから供給される湯水に、バイパス給水路から供給される水を混合させることができる。 According to this 1st invention, the said check valve is provided in each of the two water flow paths of the said bypass water supply path. For this reason, even if any one of the check valves is maintained in the closed state, water can be supplied from the bypass water supply path to the connection portion as long as the other check valves are normal. As a result, the hot water supplied from the hot water storage tank to the connection location can be mixed with the water supplied from the bypass water supply channel.
ここで、本願発明者の各種実験、検討によって、前記バイパス給水路の2つの通水路のそれぞれに前記逆止弁が設けられている給湯システムにあっては、前記混合割合調整弁をある適切な動作状態に制御した状態における前記第1〜第3流量のうちの任意の2つの流量の値の組に着目した場合、当該2つの流量の値の組が、前記バイパス給水路の2つの通水路に設けられた逆止弁のいずれもが正常である場合と、いずれか一方の逆止弁が閉弁状態に保持される故障が発生した場合とで、比較的顕著な相違を生じやすいことが判明した。 Here, in the hot water supply system in which the check valve is provided in each of the two water flow paths of the bypass water supply path by various experiments and examinations of the inventor of the present application, the mixing ratio adjusting valve is appropriately set. When paying attention to a set of two arbitrary flow rates among the first to third flow rates in the state controlled to the operating state, the two sets of flow rate values are the two water passages of the bypass water supply channel. There may be a relatively significant difference between the case where any one of the check valves provided in the case is normal and the case where a failure occurs in which one of the check valves is kept closed. found.
そこで、第1発明では、前記異常対応処理手段は、前記混合割合調整弁があらかじめ定められた所定の動作状態に制御されているという条件を少なくとも満たす特定状態で前記給水路及び給湯路の通水が行われる運転中に前記流量検出手段により得られた2つの流量の検出値に基づいて、前記バイパス給水路に設けられた逆止弁のうちのいずれかの逆止弁の故障の発生の有無を検知する。 Therefore, in the first invention, the abnormality handling processing means is configured to allow the water supply passage and the hot water supply passage to flow in a specific state that satisfies at least a condition that the mixing ratio adjusting valve is controlled to a predetermined operation state determined in advance. Whether one of the check valves provided in the bypass water supply channel has failed based on the detected values of the two flow rates obtained by the flow rate detecting means during operation Is detected.
これにより、前記異常対応処理手段は、前記いずれかの逆止弁の故障の発生の有無を適切に検知することができる。この場合、混合割合調整弁の前記所定の動作状態は、前記バイパス給水路の2つの通水路に設けられた逆止弁のいずれもが正常である場合と、いずれか一方の逆止弁が閉弁状態に保持される故障が発生した場合とで、前記2つの流量の検出値の組が比較的顕著な相違を生じ得るように、あらかじめ実験等に基づいて定めておけばよい。 Thereby, the abnormality handling processing means can appropriately detect the presence or absence of the failure of any one of the check valves. In this case, the predetermined operation state of the mixing ratio adjusting valve is determined when the check valves provided in the two water passages of the bypass water supply passage are normal and when one of the check valves is closed. It may be determined in advance based on experiments or the like so that a pair of detected values of the two flow rates may have a relatively significant difference between the case where a failure held in the valve state occurs.
そして、第1発明では、該故障検知手段により前記いずれかの逆止弁の故障の発生が検知された場合に、前記異常対応処理が前記異常対応処理手段により実行される。 In the first invention, when the failure detection means detects the occurrence of any one of the check valves, the abnormality handling process is executed by the abnormality handling process means.
よって、第1発明によれば、バイパス給水路の逆止弁の故障によって、貯湯タンク内の加熱された湯水に給水路側の水を混合させることができなくなるのを極力防止することができると共に、該逆止弁の故障を適切に検知して、該検知に応じた処置を実行できる。 Therefore, according to the first aspect of the present invention, it is possible to prevent the water on the water supply channel side from being mixed with the heated hot water in the hot water storage tank as much as possible due to the failure of the check valve of the bypass water supply channel. It is possible to appropriately detect a failure of the check valve and execute a treatment corresponding to the detection.
かかる第1発明では、前記故障検知手段は、前記2つの流量の検出値の比率と所定の判定閾値との大小関係の判定結果に基づいて、前記いずれかの逆止弁の故障の発生の有無を検知するように構成されていることが好ましい(第2発明)。 In the first aspect of the invention, the failure detection means determines whether or not a failure of any one of the check valves has occurred based on a determination result of a magnitude relationship between a ratio of the two flow rate detection values and a predetermined determination threshold. It is preferable to be configured to detect (second invention).
すなわち、前記特定状態での前記2つの流量の検出値の比率の大きさは、前記バイパス給水路の2つの通水路に設けられた逆止弁のいずれもが正常である場合と、いずれか一方の逆止弁が閉弁状態に保持される故障が発生した場合とで、比較的大きく相違する。 That is, the magnitude of the ratio of the detected values of the two flow rates in the specific state is that either one of the check valves provided in the two water passages of the bypass water supply passage is normal or one of them. This is relatively different from the case where a failure occurs in which the check valve is kept closed.
従って、第2発明によれば、前記2つの流量の検出値の比率と所定の判定閾値との大小関係の判定結果に基づいて、前記いずれかの逆止弁の故障の発生の有無を適切に検知できる。 Therefore, according to the second invention, based on the determination result of the magnitude relationship between the ratio of the detected values of the two flow rates and the predetermined determination threshold, whether or not any of the check valves has failed is appropriately determined. Can be detected.
上記第2発明では、前記流量検出手段が検出する流量は前記第3流量を含んでおり、前記故障検知手段は、前記第3流量の検出値に応じて前記所定の判定閾値を可変的に設定する機能を含むことが好ましい(第3発明)。 In the second aspect of the invention, the flow rate detected by the flow rate detection unit includes the third flow rate, and the failure detection unit variably sets the predetermined determination threshold according to the detected value of the third flow rate. It is preferable that the function to perform is included (3rd invention).
ここで、前記比率は、前記逆止弁のいずれもが正常である場合と、いずれか一方の逆止弁が閉弁状態に保持される故障が発生した場合とのいずれの場合であっても、前記比率は、一般に前記第3流量の値に応じて変化する。 Here, the ratio may be either a case where all of the check valves are normal or a case where a failure occurs in which one of the check valves is kept closed. The ratio generally varies depending on the value of the third flow rate.
そこで、第3発明では、上記の如く前記第3流量の検出値に応じて前記所定の判定閾値を可変的に設定する。これにより、前記第3流量の幅広い範囲内で、前記いずれかの逆止弁の故障の発生の有無を適切に検知できる。 Therefore, in the third invention, the predetermined determination threshold is variably set according to the detected value of the third flow rate as described above. Thereby, within the wide range of the said 3rd flow volume, the presence or absence of generation | occurrence | production of the said any one of the non-return valves is appropriately detectable.
さらに、上記第2発明又は第3発明では、前記故障検知手段は、前記比率と前記所定の判定閾値との大小関係が、あらかじめ定められた関係となる状態が、所定時間以上継続した場合に、前記いずれかの逆止弁の故障の発生を検知するように構成されていることが好ましい(第4発明)。 Furthermore, in the second invention or the third invention, the failure detection means, when a state in which the magnitude relationship between the ratio and the predetermined determination threshold is a predetermined relationship continues for a predetermined time or more, It is preferable to be configured to detect the occurrence of any one of the check valves (fourth invention).
これによれば、給水圧の一時的な変動等に起因して、前記比率と前記所定の判定閾値との大小関係が、一時的に、前記あらかじめ定められた関係となっても、前記故障検知部が、直ちに、前記いずれかの逆止弁の故障が発生したと判断してしまうのを防止できる。このため、前記故障検知部による検知結果の信頼性を高めることができる。 According to this, even if the magnitude relationship between the ratio and the predetermined determination threshold is temporarily set to the predetermined relationship due to temporary fluctuations in the supply water pressure, the failure detection is performed. It is possible to prevent the unit from immediately determining that one of the check valves has failed. For this reason, the reliability of the detection result by the said failure detection part can be improved.
また、前記第1〜第4発明では、前記流量検出手段が検出する流量は前記第3流量を含んでおり、前記特定状態は、前記混合割合調整弁が前記所定の動作状態に制御されているという条件に加えて、前記第3流量の検出値が所定値以上であるという条件をさらに満たす状態であることが好ましい(第5発明)。 In the first to fourth aspects of the invention, the flow rate detected by the flow rate detection means includes the third flow rate, and the specific state is such that the mixing ratio adjustment valve is controlled to the predetermined operating state. In addition to the above condition, it is preferable that the condition that the detected value of the third flow rate is a predetermined value or more is further satisfied (fifth invention).
ここで、前記第3流量が比較的小さい状態では、前記2つの流量の検出値の組は、前記逆止弁のいずれもが正常である場合と、いずれか一方の逆止弁が閉弁状態に保持される故障が発生した場合とで、顕著な相違が生じ難くなりやすい。 Here, in the state where the third flow rate is relatively small, the set of detected values of the two flow rates is when both of the check valves are normal and when one of the check valves is closed. It is difficult for a significant difference to occur when a failure held in the case occurs.
そこで、第5発明では、前記混合割合調整弁が前記所定の動作状態に制御されているという条件に加えて、前記第3流量の検出値が所定値以上であるという条件をさらに満たす状態を前記特定状態として採用した。 Therefore, in the fifth aspect of the invention, in addition to the condition that the mixing ratio adjusting valve is controlled to the predetermined operation state, a state that further satisfies the condition that the detected value of the third flow rate is a predetermined value or more Adopted as a specific state.
これにより、前記故障検知部による検知結果の信頼性を高めることができる。 Thereby, the reliability of the detection result by the said failure detection part can be improved.
上記第1〜第5発明では、前記混合割合調整弁の前記所定の動作状態は、前記バイパス給水路に設けられた全ての前記逆止弁が正常である場合における前記給水路及び給湯路の通水時に、前記第1流量よりも前記第2流量の方が大きくなる動作状態であることが好ましい(第6発明)。 In the first to fifth aspects of the invention, the predetermined operation state of the mixing ratio adjusting valve is that the water supply passage and the hot water supply passage are in a state where all the check valves provided in the bypass water supply passage are normal. It is preferable that the second flow rate is larger than the first flow rate during water operation (sixth invention).
これによれば、前記逆止弁のいずれもが正常である場合と、いずれか一方の逆止弁が閉弁状態に保持される故障が発生した場合とで、前記2つの流量の検出値の組の相違を、好適に顕著なものとすることができる。その結果、前記故障検知部による検知結果の信頼性を高めることができる。 According to this, when both of the check valves are normal, and when a failure occurs in which one of the check valves is kept closed, the detected values of the two flow rates are The difference between the sets can be suitably noticeable. As a result, the reliability of the detection result by the failure detection unit can be improved.
上記第1〜第6発明では、前記温調制御手段が、前記接続箇所の下流側で前記給湯路を流れる湯水の温度を制御するための制御処理として、前記混合割合調整弁を制御する処理を実行している状態では、一般には、該混合割合調整弁が前記所定の動作状態に制御されるとは限られない。また、混合割合調整弁が前記所定の動作状態に制御されたとしても、その状態が瞬時的なものとなってしまう場合も多い。 In the first to sixth inventions, the temperature control control means performs a process of controlling the mixing ratio adjusting valve as a control process for controlling the temperature of the hot water flowing through the hot water supply channel on the downstream side of the connection location. In general, the mixing ratio adjusting valve is not always controlled to the predetermined operating state in the running state. Further, even when the mixing ratio adjusting valve is controlled to the predetermined operation state, the state often becomes instantaneous.
そこで、上記第1〜第6発明では、前記貯湯タンクの湯切れ状態を検知する湯切れ検知手段と、前記接続箇所から前記給湯路の下流側に流れる湯水を加熱する第2熱源機とをさらに備えており、前記温調制御手段は、前記給湯路からの出湯を行う運転中に、前記湯切れ検知手段により前記貯湯タンクの湯切れ状態が検知された場合に、前記第2熱源機を作動させると共に、前記混合割合調整弁を前記所定の動作状態に保持するように構成されており、前記特定状態に係る前記所定の動作状態は、前記湯切れ検知手段により前記貯湯タンクの湯切れ状態が検知されたことに応じて前記温調制御手段により前記混合割合調整弁を制御してなる動作状態であることが好ましい(第7発明)。 Therefore, in the first to sixth aspects of the invention, the hot water detection means for detecting the hot water condition of the hot water storage tank and the second heat source device for heating the hot water flowing from the connection location to the downstream side of the hot water supply path are further provided. The temperature control control means operates the second heat source unit when the hot water outage detection means detects that the hot water storage tank has run out during the operation of discharging hot water from the hot water supply passage. And the mixing ratio adjustment valve is configured to be held in the predetermined operation state. The predetermined operation state related to the specific state is determined by the hot water detection state of the hot water storage tank. It is preferable that the mixing ratio adjusting valve is controlled by the temperature control means in response to the detection (operation 7).
なお、貯湯タンクの上記湯切れ状態は、前記接続箇所の下流側で前記給湯路を流れる湯水の温度の制御目標(目標温度)よりも高い温度の湯水が、該貯湯タンク内に無いか、もしくはほとんど無い状態である。この状態は、換言すれば、前記混合割合調整弁を制御しても、前記接続箇所の下流側で前記給湯路を流れる湯水の温度を目標温度に制御することができない状態である。 In the hot water storage tank, there is no hot water in the hot water storage tank that has a temperature higher than the control target (target temperature) of the temperature of the hot water flowing through the hot water supply channel on the downstream side of the connection point, or There is almost no state. In other words, this state is a state in which the temperature of the hot water flowing through the hot water supply path cannot be controlled to the target temperature on the downstream side of the connection location even if the mixing ratio adjusting valve is controlled.
上記第7発明によれば、前記温調制御手段は、前記給湯路からの出湯を行う運転中に、前記湯切れ検知手段により前記貯湯タンクの湯切れ状態が検知された場合に、前記第2熱源機を作動させると共に、前記混合割合調整弁を前記所定の動作状態に保持する。 According to the seventh aspect of the invention, the temperature control control means is configured to detect the second hot water tank when the hot water detection means detects the hot water out condition of the hot water storage tank during the operation of discharging the hot water from the hot water supply passage. While operating a heat source machine, the said mixing ratio adjustment valve is hold | maintained in the said predetermined operation state.
この場合、第2熱源機を作動させることで、前記接続箇所の下流側で前記給湯路を流れる湯水の温度を制御することができる。従って、該湯水の温度の制御を適切に行いつつ、前記混合割合調整弁を強制的に前記所定の動作状態に保持することができる。 In this case, the temperature of the hot water flowing through the hot water supply path can be controlled on the downstream side of the connection location by operating the second heat source machine. Therefore, the mixing ratio adjusting valve can be forcibly held in the predetermined operating state while appropriately controlling the temperature of the hot water.
ひいては、前記故障検知手段によって、いずれかの逆止弁の故障の発生の有無を検知する処理の実行頻度を高めることができる。 As a result, the failure detection means can increase the execution frequency of the process for detecting whether or not any check valve has failed.
また、当該故障の発生の有無の検知を、混合割合調整弁の動作状態が前記所定の動作状態に安定した状態で行うことが可能となるので、当該故障の発生の有無の検知の信頼性を高めることができる。 In addition, since it is possible to detect the occurrence of the failure in a state where the operation state of the mixing ratio adjusting valve is stable in the predetermined operation state, the reliability of the detection of the occurrence of the failure can be improved. Can be increased.
上記第7発明では、前記給湯路は、浴槽に給湯し得るように該浴槽に接続されている場合には、前記特定状態に係る前記所定の動作状態は、前記浴槽への湯はりを行う湯はり運転中に、前記湯切れ検知手段により前記貯湯タンクの湯切れ状態が検知されたことに応じて前記温調制御手段により前記混合割合調整弁を制御してなる動作状態であることが好ましい(第8発明)。 In the seventh invention, when the hot water supply passage is connected to the bathtub so that the hot water can be supplied to the bathtub, the predetermined operation state related to the specific state is hot water for hot water to the bathtub. During the beam operation, it is preferable that the mixing ratio adjusting valve is controlled by the temperature adjustment control means in response to the detection of the hot water condition of the hot water storage tank by the hot water detection means. (8th invention).
ここで、前記湯はり運転時には、前記貯湯タンクの湯切れ状態が発生しやすい。また、該湯切れ状態の発生後、前記混合割合調整弁を、比較的長い時間にわたって、前記所定の動作状態に保持することが可能である。 Here, during the hot water operation, the hot water storage tank tends to run out. In addition, after the hot water outage occurs, the mixing ratio adjusting valve can be held in the predetermined operation state for a relatively long time.
このため、第8発明によれば、前記いずれかの逆止弁の故障の発生の有無を検知することを、湯はり運転時に高い信頼性で行うことができる。 For this reason, according to the eighth aspect of the present invention, it is possible to detect whether or not one of the check valves has failed with high reliability during hot water operation.
また、上記第1〜第8発明では、前記異常対応処理手段が実行する前記異常対応処理は、前記第1熱源機の作動を禁止する処理と、前記いずれかの逆止弁の故障が発生した旨を報知する処理とを含むことが好ましい(第9発明)。 In the first to eighth aspects of the invention, the abnormality handling processing executed by the abnormality handling processing means includes processing for prohibiting the operation of the first heat source unit and failure of any one of the check valves. It is preferable to include the process which alert | reports that (9th invention).
これによれば、いずれかの逆止弁が故障している状態で、第1熱源機によって、貯湯タンクの湯水の加熱が行われるのが防止される。また、前記報知によって、ユーザは、前記いずれかの逆止弁の故障が発生したことを認識できるので、業者への修理依頼等を適切に行うことができる。 According to this, it is prevented that the hot water of the hot water storage tank is heated by the first heat source machine in a state where any one of the check valves is malfunctioning. Further, since the notification allows the user to recognize that any one of the check valves has failed, it is possible to appropriately make a repair request to a supplier.
本発明の一実施形態を図1〜図4を参照して以下に説明する。図1を参照して、本実施形態の給湯システム1は、貯湯タンク2と、第1熱源機3と、第2熱源機4とを備える。 An embodiment of the present invention will be described below with reference to FIGS. With reference to FIG. 1, a hot water supply system 1 of the present embodiment includes a hot water storage tank 2, a first heat source device 3, and a second heat source device 4.
第1熱源機3は、貯湯タンク2内の湯水を加熱する熱源機である。該第1熱源機3は、本実施形態では、例えばヒートポンプ装置である。以降、第1熱源機3をヒートポンプ装置3という。 The first heat source unit 3 is a heat source unit that heats the hot water in the hot water storage tank 2. In the present embodiment, the first heat source device 3 is, for example, a heat pump device. Hereinafter, the first heat source device 3 is referred to as a heat pump device 3.
ヒートポンプ装置3は、図示を省略する圧縮機、凝縮器、膨張機、蒸発器等が冷媒の循環路に配設された公知の構成のものである。該ヒートポンプ装置3は、貯湯タンク2との間で湯水を循環させる循環流路10を介して貯湯タンク2に接続されている。該循環流路10は、貯湯タンク2の下部をヒートポンプ装置3に接続する往路側流路10aと、貯湯タンク2の上部をヒートポンプ装置3に接続する復路側流路10bとから構成されている。 The heat pump device 3 has a known configuration in which a compressor, a condenser, an expander, an evaporator, and the like (not shown) are arranged in a refrigerant circulation path. The heat pump device 3 is connected to the hot water storage tank 2 via a circulation channel 10 that circulates hot water between the hot water storage tank 2. The circulation flow path 10 includes an outward path side flow path 10 a that connects the lower part of the hot water storage tank 2 to the heat pump device 3, and a return path side flow path 10 b that connects the upper part of the hot water storage tank 2 to the heat pump apparatus 3.
そして、往路側流路10a及び復路側流路10bのいずれか一方、例えば往路側流路10aに循環ポンプ11が介装されている。この循環ポンプ11を作動させることで、貯湯タンク2内の湯水が、往路側流路10a、ヒートポンプ装置3(詳しくは、ヒートポンプ装置3の凝縮器)、復路側流路10bを順に経由して貯湯タンク2に還流するようになっている。 And the circulation pump 11 is interposed in either the forward path side flow path 10a or the return path side flow path 10b, for example, the forward path side flow path 10a. By operating the circulation pump 11, hot water in the hot water storage tank 2 is stored in hot water via the forward path side channel 10 a, the heat pump device 3 (specifically, the condenser of the heat pump device 3), and the return side channel 10 b in this order. It returns to the tank 2.
このとき、ヒートポンプ装置3は、往路側流路10aから供給される湯水と、圧縮機で加圧・昇温された冷媒との熱交換を凝縮器で行うことによって、該湯水を加熱する。 At this time, the heat pump device 3 heats the hot water by performing heat exchange between the hot water supplied from the forward flow path 10a and the refrigerant pressurized and heated by the compressor using the condenser.
また、循環流路10の往路側流路10aには、貯湯タンク2からヒートポンプ装置3に供給される湯水の温度を検出する温度センサ12が装着され、復路側流路10bには、ヒートポンプ装置3から貯湯タンク2に供給される湯水の温度を検出する温度センサ13が装着されている。 In addition, a temperature sensor 12 for detecting the temperature of hot water supplied from the hot water storage tank 2 to the heat pump device 3 is mounted on the forward path side channel 10a of the circulation channel 10, and the heat pump device 3 is mounted on the return path side channel 10b. A temperature sensor 13 for detecting the temperature of hot water supplied to the hot water storage tank 2 is mounted.
貯湯タンク2は給湯用の湯水を蓄える蓄熱タンクである。この貯湯タンク2の上部の内部には、その内部の湯水の温度を検出する温度センサ15が所定の高さ位置で配置されている。 The hot water storage tank 2 is a heat storage tank that stores hot water for hot water supply. Inside the hot water storage tank 2, a temperature sensor 15 for detecting the temperature of the hot water inside the hot water storage tank 2 is disposed at a predetermined height position.
また、貯湯タンク2には、上記循環流路10の他、給水路21および給湯路31が接続されている。 In addition to the circulation channel 10, a water supply channel 21 and a hot water supply channel 31 are connected to the hot water storage tank 2.
給水路21は、その上流側が図示しない給水源に接続され、下流端が貯湯タンク2の下部に接続されている。そして、給水路21には、給水圧を減圧する減圧弁22と、給水路21での水の逆流を防止する逆止弁23とが上流側から順に介装されている。 The upstream side of the water supply path 21 is connected to a water supply source (not shown), and the downstream end is connected to the lower part of the hot water storage tank 2. The water supply passage 21 is provided with a pressure reducing valve 22 for reducing the water supply pressure and a check valve 23 for preventing a backflow of water in the water supply passage 21 in order from the upstream side.
また、給水路21は、貯湯タンク2をバイパスさせて(貯湯タンク2を経由させずに)給湯路31に給水し得るように、バイパス給水路24を介して給湯路31に接続されている。 Further, the water supply path 21 is connected to the hot water supply path 31 via the bypass water supply path 24 so that the hot water supply tank 2 can be bypassed (without passing through the hot water storage tank 2).
該バイパス給水路24は、その上流端が、給水路21のうちの前記減圧弁22と逆止弁23との間の途中箇所X1にて該給水路21に接続され、下流端が、給湯路31の途中箇所X2に介装された混合割合調整弁32(詳細は後述する)を介して該給湯路31に接続されている。 The bypass water supply channel 24 has an upstream end connected to the water supply channel 21 at an intermediate point X1 between the pressure reducing valve 22 and the check valve 23 in the water supply channel 21, and a downstream end connected to the water supply channel. 31 is connected to the hot water supply passage 31 via a mixing ratio adjusting valve 32 (details will be described later) interposed in the middle portion X2.
バイパス給水路24は、その中間部分が、互いに並列に接続された2つの通水路24a,24aにより構成されている。そして、2つの通水路24a,24aのそれぞれにバイパス給水路24での水の逆流を防止する逆止弁25,25が介装されている。これらの逆止弁25,25は、その流路面積等の仕様が互いに同一である。 The intermediate portion of the bypass water supply channel 24 is constituted by two water channels 24a and 24a connected in parallel to each other. And the check valves 25 and 25 which prevent the backflow of the water in the bypass water supply path 24 are interposed by the two water flow paths 24a and 24a, respectively. These check valves 25 and 25 have the same specifications such as the flow path area.
また、バイパス給水路24には、該バイパス給水路24から給湯路31に流れる水の流量(以降、バイパス給水流量という)を検出する流量センサ26が通水路24a,24aの下流側で装着されている。 In addition, a flow rate sensor 26 for detecting the flow rate of water flowing from the bypass water supply channel 24 to the hot water supply channel 31 (hereinafter referred to as bypass water supply flow rate) is attached to the bypass water supply channel 24 on the downstream side of the water flow channels 24a and 24a. Yes.
給湯路31は、貯湯タンク2の上部から導出されている。そして、給湯路31は、上記途中箇所X2(バイパス給水路24との接続箇所)に介装された混合割合調整弁32と、第2熱源機4とを順に経由した後、台所、洗面所、浴室等の給湯対象場所(湯の供給対象場所)に配置されるカラン等の給湯口(図示省略)に至るように配設されている。 The hot water supply path 31 is led out from the upper part of the hot water storage tank 2. And the hot water supply path 31 passes through the mixing ratio adjusting valve 32 and the second heat source unit 4 interposed in the middle place X2 (connection place with the bypass water supply path 24) in order, and then the kitchen, the washroom, It is arranged so as to reach a hot water supply port (not shown) such as a currant disposed in a hot water supply target place (hot water supply target place) such as a bathroom.
上記混合割合調整弁32は、貯湯タンク2から供給される湯水とバイパス給水路24から供給される水とを混合してなる湯水を給湯路31の下流側に流すと共に、貯湯タンク2から供給される湯水とバイパス給水路24から供給される水との混合割合(流量比)を可変的に制御し得る弁機構である。該混合割合調整弁32は、例えば電動式の三方弁により構成される。 The mixing ratio adjusting valve 32 supplies hot water, which is a mixture of hot water supplied from the hot water storage tank 2 and water supplied from the bypass water supply passage 24, to the downstream side of the hot water supply passage 31 and is supplied from the hot water storage tank 2. This is a valve mechanism that can variably control the mixing ratio (flow rate ratio) between the hot water and the water supplied from the bypass water supply path 24. The mixing ratio adjusting valve 32 is constituted by an electric three-way valve, for example.
より詳しくは、混合割合調整弁32は、上流側の給湯路31に接続される第1入口ポートと、バイパス給水路24に接続される第2入口ポートと、下流側の給湯路31に接続される出口ポートとを有する。そして、混合割合調整弁32は、第1入口ポートから出口ポートに至る流路の開度と、第2入口ポートから出口ポートに至る流路の開度との比率を、ステッピングモータ等の電動モータによって変化させることができるように構成されている。これにより、上記混合割合を可変的に制御することが可能となっている。 More specifically, the mixing ratio adjusting valve 32 is connected to the first inlet port connected to the upstream hot water supply path 31, the second inlet port connected to the bypass water supply path 24, and the downstream hot water supply path 31. And an exit port. The mixing ratio adjusting valve 32 determines the ratio between the opening degree of the flow path from the first inlet port to the outlet port and the opening degree of the flow path from the second inlet port to the outlet port. It is comprised so that it can change by. Thereby, it is possible to variably control the mixing ratio.
この場合、混合割合調整弁32の第1入口ポートに貯湯タンク2から流入する湯水の流量(以降、タンク出湯流量という)をWa、混合割合調整弁32の第2入口ポートにバイパス給水路24から流入する水の流量(すなわち前記バイパス給水流量)をWb、混合割合調整弁32の出口ポートから給湯路31の下流側に流出する水の流量(以降、総給湯流量という)をWcと表記すると、Wa/Wc(又はWb/Wc)をゼロから1までの範囲内で変化させることが可能となっている。なお、Wc=Wa+Wbである。 In this case, the flow rate of hot water flowing into the first inlet port of the mixing ratio adjusting valve 32 from the hot water storage tank 2 (hereinafter referred to as tank outlet water flow rate) is Wa, and the second inlet port of the mixing ratio adjusting valve 32 is connected from the bypass water supply path 24. When the flow rate of water flowing in (that is, the bypass feed water flow rate) is expressed as Wb, the flow rate of water flowing out from the outlet port of the mixing ratio adjusting valve 32 to the downstream side of the hot water supply channel 31 (hereinafter referred to as total hot water supply flow rate) is expressed as Wc. Wa / Wc (or Wb / Wc) can be changed within a range from zero to one. Note that Wc = Wa + Wb.
補足すると、本実施形態では、混合割合調整弁32を上記の如く電動式の三方弁により構成した。ただし、例えば、給湯路31とバイパス給水路24との接続箇所(途中箇所X2)の上流側の給湯路31とバイパス給水路24とにそれぞれ流量制御弁を介装し、これらの流量制御弁を、混合割合調整弁として構成することも可能である。 Supplementally, in the present embodiment, the mixing ratio adjusting valve 32 is constituted by an electric three-way valve as described above. However, for example, a flow rate control valve is provided in each of the hot water supply channel 31 and the bypass water supply channel 24 on the upstream side of the connection point (halfway point X2) between the hot water supply channel 31 and the bypass water supply channel 24, and these flow rate control valves are installed. It is also possible to configure as a mixing ratio adjusting valve.
混合割合調整弁32の上流側の給湯路31には、上記タンク出湯流量を検出する流量センサ33が装着されている。 A flow rate sensor 33 that detects the tank hot water flow rate is attached to the hot water supply passage 31 upstream of the mixing ratio adjustment valve 32.
混合割合調整弁32の下流側の給湯路31のうち、第2熱源機4の上流側の途中箇所X3と第2熱源機4の下流側の途中箇所X4とは、バイパス給湯路34を介して接続されている。このバイパス給湯路34により、第2熱源機4の上流側の途中箇所X3から下流側の途中箇所X4に、該第2熱源機4をバイパスさせて(第2熱源機4を経由させずに)湯水を流すことが可能となっている。そして、バイパス給湯路34には、これを開閉可能なバイパス制御弁35が介装されている。 Among the hot water supply passages 31 on the downstream side of the mixing ratio adjusting valve 32, the intermediate point X 3 on the upstream side of the second heat source device 4 and the intermediate point X 4 on the downstream side of the second heat source device 4 are connected via the bypass hot water supply passage 34. It is connected. By this bypass hot water supply path 34, the second heat source unit 4 is bypassed from the upstream intermediate point X3 of the second heat source unit 4 to the downstream intermediate point X4 (without passing through the second heat source unit 4). It is possible to run hot water. The bypass hot water supply passage 34 is provided with a bypass control valve 35 that can be opened and closed.
また、混合割合調整弁32と上記途中箇所X3との間の給湯路31には、混合割合調整弁32の出口ポートから給湯路31の下流側に流出する湯水の温度(以降、混合給湯温度という)を検出する温度センサ36が装着されている。 In addition, in the hot water supply passage 31 between the mixing ratio adjustment valve 32 and the intermediate point X3, the temperature of hot water flowing out from the outlet port of the mixing ratio adjustment valve 32 to the downstream side of the hot water supply passage 31 (hereinafter referred to as mixed hot water supply temperature). ) Is mounted.
さらに、上記途中箇所X4の下流側の給湯路31には、給湯対象場所の給湯口に供給される湯水の温度を検出する温度センサ37が装着されている。 Furthermore, a temperature sensor 37 that detects the temperature of the hot water supplied to the hot water supply port at the hot water supply target location is attached to the hot water supply passage 31 on the downstream side of the intermediate point X4.
第2熱源機4は、給湯路31で給湯対象場所の給湯口に供給される湯水を必要に応じて加熱する熱源機である。この第2熱源機4は、本実施形態では、例えば燃焼式熱源機である。以降、第2熱源機4を燃焼式熱源機4という。 The 2nd heat source machine 4 is a heat source machine which heats the hot water supplied to the hot-water supply port of the hot-water supply object place by the hot-water supply path 31 as needed. In the present embodiment, the second heat source unit 4 is, for example, a combustion heat source unit. Hereinafter, the second heat source unit 4 is referred to as a combustion heat source unit 4.
この燃焼式熱源機4は、ガスバーナ等のバーナ41と、該バーナ41の燃焼熱により加熱される熱交換器42とを備える。そして、燃焼式熱源機4に導入された給湯路31は、該燃焼式熱源機4の上流側から熱交換器42を経由して下流側に至るように配設されている。 The combustion heat source unit 4 includes a burner 41 such as a gas burner and a heat exchanger 42 that is heated by the combustion heat of the burner 41. The hot water supply path 31 introduced into the combustion type heat source unit 4 is disposed so as to reach the downstream side via the heat exchanger 42 from the upstream side of the combustion type heat source unit 4.
燃焼式熱源機4は、さらに、熱交換器42の上流側から下流側に該熱交換器42をバイパスさせて(該熱交換器42を経由させずに)湯水を流すバイパス流路43と、熱交換器42の下流側から浴槽Bに湯はり用の湯水を供給する湯はり流路44とを備える。 The combustion heat source unit 4 further includes a bypass flow path 43 for bypassing the heat exchanger 42 from the upstream side to the downstream side of the heat exchanger 42 (without passing through the heat exchanger 42) and flowing hot water. A hot water flow path 44 for supplying hot water for hot water to the bathtub B from the downstream side of the heat exchanger 42 is provided.
バイパス流路43は、燃焼式熱源機4の内部の給湯路31のうち、熱交換器42の上流側の途中箇所と熱交換器42の下流側の途中箇所とを接続している。そして、熱交換器42の上流側における給湯路31とバイパス流路43との接続箇所には、該接続箇所から熱交換器42に流れる湯水の流量と、バイパス流路43に流れる湯水の流量との比率(バイパス比)を調整するためのバイパスサーボ弁45が介装されている。該バイパスサーボ弁45は、例えば電動式の三方弁により構成される。 The bypass flow path 43 connects an intermediate position on the upstream side of the heat exchanger 42 and an intermediate position on the downstream side of the heat exchanger 42 in the hot water supply path 31 inside the combustion heat source device 4. And in the connection place of the hot water supply path 31 and the bypass flow path 43 in the upstream of the heat exchanger 42, the flow volume of the hot water which flows into the heat exchanger 42 from this connection position, the flow volume of the hot water which flows into the bypass flow path 43, A bypass servo valve 45 for adjusting the ratio (bypass ratio) is provided. The bypass servo valve 45 is constituted by an electric three-way valve, for example.
湯はり流路44は、熱交換器42の下流側の給湯路31から分岐されて、浴槽Bに至るように配設されている。そして、この湯はり流路44には、該湯はり流路44を開閉する湯はり弁46が介装されている。 The hot water flow path 44 is branched from the hot water supply path 31 on the downstream side of the heat exchanger 42 and is disposed so as to reach the bathtub B. The hot water flow path 44 is provided with a hot water valve 46 for opening and closing the hot water flow path 44.
また、燃焼式熱源機4の内部の給湯路31には、燃焼式熱源機4に供給される湯水の全体の流量をバイパスサーボ弁45の上流側で検出する流量センサ47と、熱交換器42の下流側におけるバイパス流路43との接続箇所の上流側にて熱交換器42から流出する湯水の温度を検出する温度センサ48と、熱交換器42の下流側におけるバイパス流路43との接続箇所の下流側に流れる湯水の温度を検出する温度センサ49とが装着されている。 Further, in the hot water supply passage 31 inside the combustion type heat source unit 4, a flow rate sensor 47 that detects the entire flow rate of hot water supplied to the combustion type heat source unit 4 on the upstream side of the bypass servo valve 45, and a heat exchanger 42. Between the temperature sensor 48 for detecting the temperature of hot water flowing out from the heat exchanger 42 on the upstream side of the connection point with the bypass flow path 43 on the downstream side of the heat exchanger 42 and the bypass flow path 43 on the downstream side of the heat exchanger 42 A temperature sensor 49 for detecting the temperature of hot water flowing downstream of the location is mounted.
さらに、湯はり流路44には、該湯はり流路44で浴槽Bに供給される湯水の流量を検出する流量センサ50が装着されている。 Further, a flow rate sensor 50 that detects the flow rate of hot water supplied to the bathtub B through the hot water flow channel 44 is attached to the hot water flow channel 44.
本実施形態の給湯システム1は、さらに、図2に示すように、該給湯システム1の運転制御を行う制御装置60と、給湯システム1の運転に関する操作をユーザが行うためのリモコン61とを備える。該制御装置60及びリモコン61は、有線又は無線により相互に通信可能である。 As shown in FIG. 2, the hot water supply system 1 of the present embodiment further includes a control device 60 that controls the operation of the hot water supply system 1 and a remote controller 61 that allows the user to perform operations related to the operation of the hot water supply system 1. . The control device 60 and the remote controller 61 can communicate with each other by wire or wireless.
リモコン61は、ユーザによる図示しない操作スイッチの操作、あるいは音声入力等に応じて、給湯システム1の給湯運転のオンオフ、浴槽Bの湯はり運転のオンオフ、給湯路31で給湯口に供給する湯水の目標温度である目標給湯温度、浴槽Bの湯はりの目標温度である目標湯はり温度等の運転操作情報を制御装置60に指示するように構成された端末機器である。該リモコン61には、給湯システム1の異常情報等を含む各種情報を表示する表示器61aが備えられている。 The remote controller 61 turns on / off the hot water supply operation of the hot water supply system 1, turns on / off the hot water supply operation of the bathtub B, and hot water supplied to the hot water outlet in the hot water supply path 31 according to the operation of an operation switch (not shown) by the user or voice input. The terminal device is configured to instruct the control device 60 of operation operation information such as a target hot water temperature that is a target temperature and a target hot water temperature that is a target temperature of the hot water of the bathtub B. The remote controller 61 is provided with a display 61a for displaying various information including abnormality information of the hot water supply system 1 and the like.
制御装置60は、CPU、RAM、ROM、インターフェース回路等を含む電子回路ユニットにより構成される。なお、制御装置60は、相互に通信可能な複数の電子回路ユニットにより構成されていてもよい。 The control device 60 is configured by an electronic circuit unit including a CPU, RAM, ROM, interface circuit, and the like. The control device 60 may be composed of a plurality of electronic circuit units that can communicate with each other.
制御装置60には、前記した各センサ(温度センサ12,13,15,36,37,48,49、流量センサ26,33,47,50)の検出データが入力される共に、リモコン61から運転操作情報が入力される。 The control device 60 is input with detection data of the respective sensors (temperature sensors 12, 13, 15, 36, 37, 48, 49, flow sensors 26, 33, 47, 50) and is operated from the remote controller 61. Operation information is input.
そして、制御装置60は、ヒートポンプ装置3、燃焼式熱源機4、循環ポンプ11、混合割合調整弁32、バイパス制御弁35等の作動制御を行うことで、給湯システム1の運転制御を行う。 And the control apparatus 60 performs operation control of the hot water supply system 1 by performing operation control of the heat pump apparatus 3, the combustion heat source machine 4, the circulation pump 11, the mixing ratio adjustment valve 32, the bypass control valve 35, and the like.
この場合、制御装置60は、実装されるプログラムを実行することにより実現される機能、あるいは、ハードウェア構成により実現される機能として、混合割合調整弁32から下流側の給湯路31に流れる湯水の温度を制御するための制御処理を実行する温調制御部71と、前記タンク出湯流量Wa、バイパス給水流量Wb、及び総給湯流量Wcのうちの2つの流量、例えばWb及びWcを検出する流量検出部72と、前記バイパス給水路24に備えた逆止弁25,25のいずれかの故障の発生の有無を検知する故障検知部73と、貯湯タンク2の湯切れ状態を検知する湯切れ検知部74と、逆止弁25,25のいずれかの故障が検知された場合等に異常対応処理を実行する異常対応処理部75とを備える。 In this case, the control device 60 performs hot water flowing from the mixing ratio adjusting valve 32 to the downstream hot water supply passage 31 as a function realized by executing the installed program or a function realized by a hardware configuration. A temperature adjustment control unit 71 that executes a control process for controlling the temperature, and a flow rate detection that detects two of the tank hot water flow rate Wa, the bypass hot water flow rate Wb, and the total hot water flow rate Wc, for example, Wb and Wc. A failure detection unit 73 for detecting whether or not a failure has occurred in any of the check valves 25, 25 provided in the bypass water supply channel 24, and a hot water detection unit for detecting a hot water outage state of the hot water storage tank 2. 74 and an abnormality handling processing unit 75 that executes an abnormality handling process when a failure of any one of the check valves 25 and 25 is detected.
なお、温調制御部71、流量検出部72、故障検知部73、湯切れ検知部74、異常対応処理部75は、それぞれ、本発明における温調制御手段、流量検出手段、故障検知手段、湯切れ検知手段、異常対応処理手段に相当する。 The temperature adjustment control unit 71, the flow rate detection unit 72, the failure detection unit 73, the hot water detection unit 74, and the abnormality handling processing unit 75 are respectively a temperature adjustment control unit, a flow rate detection unit, a failure detection unit, and hot water in the present invention. It corresponds to a cut detection means and an abnormality handling processing means.
また、タンク出湯流量Wa、バイパス給水流量Wb、及び総給湯流量Wcは、それぞれ、本発明における第1流量、第2流量、第3流量に相当する。 Further, the tank hot water flow rate Wa, the bypass water supply flow rate Wb, and the total hot water supply flow rate Wc correspond to the first flow rate, the second flow rate, and the third flow rate, respectively, in the present invention.
上記温調制御部71は、温調制御処理として、混合割合調整弁32、バイパス制御弁35及び燃焼式熱源機4の作動制御を行う。 The said temperature control part 71 performs operation control of the mixing ratio adjustment valve 32, the bypass control valve 35, and the combustion type heat source machine 4 as a temperature control process.
上記流量検出部72は、前記流量センサ26,33の検出データに基づいて、バイパス給水流量Wb及び総給湯流量Wcのそれぞれの検出値を取得する。この場合、流量検出部72は、流量センサ26の検出データにより示される流量検出値を、バイパス給水流量Wbの検出値として取得する。また、流量検出部72は、流量センサ26,33のそれぞれの検出データにより示される流量検出値を加算してなる値を総給湯流量Wcの検出値として取得する。 The flow rate detection unit 72 acquires detection values of the bypass feed water flow rate Wb and the total hot water supply flow rate Wc based on the detection data of the flow rate sensors 26 and 33. In this case, the flow rate detection unit 72 acquires the flow rate detection value indicated by the detection data of the flow rate sensor 26 as the detection value of the bypass feed water flow rate Wb. Further, the flow rate detection unit 72 acquires a value obtained by adding the flow rate detection values indicated by the detection data of the flow rate sensors 26 and 33 as the detection value of the total hot water supply flow rate Wc.
上記故障検知部73は、混合割合調整弁32が所定の動作状態に制御された状態でのバイパス給水流量Wb及び総給湯流量Wcの検出値の比率(Wb/Wc)に基づいて、逆止弁25,25のいずれかの故障の発生の有無を検知する。 The failure detection unit 73 has a check valve based on the ratio (Wb / Wc) of the detected values of the bypass water supply flow rate Wb and the total hot water supply flow rate Wc when the mixing ratio adjustment valve 32 is controlled to a predetermined operation state. The presence / absence of the failure of any one of 25 and 25 is detected.
この場合、混合割合調整弁32の所定の動作状態は、該混合割合調整弁32の第1入口ポートから出口ポートに至る流路の開度と、第2入口ポートから出口ポートに至る流路の開度とが所定の一定開度に維持される状態である。 In this case, the predetermined operation state of the mixing ratio adjusting valve 32 includes the opening degree of the flow path from the first inlet port to the outlet port of the mixing ratio adjusting valve 32 and the flow path from the second inlet port to the outlet port. In this state, the opening is maintained at a predetermined constant opening.
この所定の動作状態は、逆止弁25,25のいずれかの故障の発生の有無を高い信頼性で検知し得るように、あらかじめ実験等に基づいて定められたものである。具体的には、混合割合調整弁32の当該所定の動作状態は、逆止弁25,25の両方が正常である場合に、当該所定の動作状態でのバイパス給水流量Wbが、タンク出湯流量Waよりも若干大きくなる(例えばWb:Waが概ね7:3となる)ような動作状態である。以降、当該動作状態を、逆止弁故障検知用動作状態という。 This predetermined operation state is determined in advance based on experiments or the like so that the presence or absence of a failure of any one of the check valves 25 and 25 can be detected with high reliability. Specifically, the predetermined operation state of the mixing ratio adjusting valve 32 is such that when both the check valves 25 and 25 are normal, the bypass feed water flow rate Wb in the predetermined operation state is the tank discharge water flow rate Wa. The operation state is slightly larger than (for example, Wb: Wa is approximately 7: 3). Hereinafter, this operation state is referred to as a check valve failure detection operation state.
湯切れ検知部74は、貯湯タンク2内の前記温度センサ15の検出データに基づいて貯湯タンク2の湯切れ状態を検知する。該湯切れ状態は、貯湯タンク2内に、所定温度以上の湯量が不足している状態である。本実施形態では、該湯切れ状態は、浴槽Bの湯はりを行う湯はり運転時において、温度センサ15の検出データにより示される温度検出値が、リモコン61で設定された目標湯はり温度以下の温度となる状態が、貯湯タンク2の湯切れ状態として検知される。 The hot water detection part 74 detects the hot water state of the hot water storage tank 2 based on the detection data of the temperature sensor 15 in the hot water storage tank 2. The hot water out condition is a state where the hot water storage tank 2 is short of the amount of hot water above a predetermined temperature. In the present embodiment, in the hot water running state, the temperature detection value indicated by the detection data of the temperature sensor 15 is equal to or lower than the target hot water temperature set by the remote controller 61 during hot water operation in which hot water is poured in the bathtub B. The temperature state is detected as a hot water out condition of the hot water storage tank 2.
次に、本実施形態の給湯システム1の作動を説明する。まず、給湯システム1の基本的な作動を説明する。 Next, the operation of the hot water supply system 1 of the present embodiment will be described. First, the basic operation of the hot water supply system 1 will be described.
給湯システム1の電源投入状態(給湯運転等を行い得る状態)で、制御装置60は、貯湯タンク2内の湯水を温度を、所定の温度(例えば45℃、55℃、65℃等)以上の温度に保つように、ヒートポンプ装置3を適宜作動させる。 When the hot water supply system 1 is in a power-on state (a state in which a hot water supply operation or the like can be performed), the control device 60 sets the temperature of the hot water in the hot water storage tank 2 to a predetermined temperature (for example, 45 ° C, 55 ° C, 65 ° C, etc.) The heat pump device 3 is appropriately operated so as to keep the temperature.
この場合、制御装置60は、前記温度センサ15の検出データにより示される温度検出値が上記所定の温度以下に低下する等の条件(貯湯タンク2内の湯水の沸き上げを行うための必要条件)が成立すると、該温度検出値が上記所定の温度よりも若干高い温度に昇温するまで、循環ポンプ11を作動させつつ、ヒートポンプ装置3を作動させる。 In this case, the control device 60 has such a condition that the temperature detection value indicated by the detection data of the temperature sensor 15 falls below the predetermined temperature (necessary condition for boiling the hot water in the hot water storage tank 2). When is established, the heat pump device 3 is operated while the circulation pump 11 is operated until the temperature detection value is raised to a temperature slightly higher than the predetermined temperature.
また、制御装置60は、給湯対象場所のカランの開栓等により給水路21及び給湯路31の通水が開始されると、それを流量センサ26,33の検出データに基づき検知する。そして、制御装置60は、当該通水の検知に応じて、給湯対象場所の給湯口に供給される湯水の温度(給湯温度)を、リモコン61で設定された目標給湯温度に一致もしくはほぼ一致させるための制御処理(温調制御処理)を実行する。 In addition, when the water supply passage 21 and the hot water supply passage 31 are started to flow through the opening of a currant at a hot water supply target location, the control device 60 detects this based on the detection data of the flow rate sensors 26 and 33. Then, in response to the detection of the water flow, control device 60 matches or substantially matches the temperature of hot water supplied to the hot water outlet at the hot water supply target location (hot water temperature) to the target hot water temperature set by remote controller 61. Control processing (temperature control processing) is executed.
この制御処理では、制御装置60は、貯湯タンク2内の温度センサ15の検出データにより示される温度(以下、タンク内温度という)の検出値が、リモコン61で設定された目標給湯温度よりも高い場合には、バイパス給湯路34のバイパス制御弁35を開弁制御すると共に、燃焼式熱源機4の作動を停止した状態(バーナ41の消火状態)で、温度センサ36(又は温度センサ37)の検出データより示される温度検出値が、目標給湯温度に所定の温度範囲内でほぼ一致するように、混合割合調整弁32をフィードバック制御する。なお、この場合、混合割合調整弁32から下流側の給湯路31に流れる湯水の大部分は、バイパス給湯路34を通って下流側に流れる。 In this control process, control device 60 has a detected value of a temperature (hereinafter referred to as a tank internal temperature) indicated by detection data of temperature sensor 15 in hot water storage tank 2 higher than a target hot water supply temperature set by remote controller 61. In this case, the bypass control valve 35 of the bypass hot water supply passage 34 is controlled to open, and the temperature sensor 36 (or the temperature sensor 37) is set in a state where the operation of the combustion heat source unit 4 is stopped (the fire extinguishing state of the burner 41). The mixing ratio adjustment valve 32 is feedback-controlled so that the temperature detection value indicated by the detection data substantially matches the target hot water supply temperature within a predetermined temperature range. In this case, most of the hot water flowing from the mixing ratio adjusting valve 32 to the downstream hot water supply passage 31 flows downstream through the bypass hot water supply passage 34.
そして、給湯運転の継続等によって貯湯タンク2が湯切れ状態となって、タンク内温度の検出値が、目標給湯温度以下の温度に低下すると、燃焼式熱源機4の作動を開始させる(バーナ41の燃焼運転を開始させる)。 Then, when the hot water storage tank 2 becomes in a state of running out of hot water due to continuation of the hot water supply operation or the like, and the detected value of the tank internal temperature falls to a temperature equal to or lower than the target hot water supply temperature, the operation of the combustion heat source unit 4 is started (burner 41). Start combustion operation).
さらに、制御装置60は、温度センサ37の検出データにより示される温度検出値が、目標給湯温度に所定の温度範囲内でほぼ一致するように、バイパス制御弁35の開度と、燃焼式熱源機4のバイパスサーボ弁45によるバイパス比と、バーナ41の燃焼量とを制御する。なお、このとき、バイパス制御弁35を閉弁制御してもよい。 Further, the control device 60 determines the degree of opening of the bypass control valve 35 and the combustion heat source so that the temperature detection value indicated by the detection data of the temperature sensor 37 substantially matches the target hot water supply temperature within a predetermined temperature range. 4 controls the bypass ratio by the bypass servo valve 45 and the combustion amount of the burner 41. At this time, the bypass control valve 35 may be closed.
また、制御装置60は、リモコン61で浴槽Bの湯はり運転(自動湯はり運転)を行うべきことが指示された場合には、湯はり弁46を開弁制御して、浴槽Bへの通水を開始する。 In addition, when the remote controller 61 instructs that the hot water operation of the bathtub B (automatic hot water operation) should be performed, the control device 60 controls the hot water valve 46 to open, Start water.
そして、制御装置60は、温度センサ15の検出データに示されるタンク内温度の検出値が、リモコン61で設定された目標湯はり温度よりも高い場合には、燃焼式熱源機4の作動を停止した状態(バーナ41の消火状態)で、燃焼式熱源機4の温度センサ49の検出データより示される温度検出値が、目標湯はり温度に所定の温度範囲内でほぼ一致するように、混合割合調整弁32を制御する。 The control device 60 stops the operation of the combustion heat source unit 4 when the detected value of the temperature in the tank indicated by the detection data of the temperature sensor 15 is higher than the target hot water temperature set by the remote controller 61. In such a state (the fire extinguishing state of the burner 41), the mixing ratio is such that the temperature detection value indicated by the detection data of the temperature sensor 49 of the combustion heat source unit 4 substantially matches the target hot water temperature within a predetermined temperature range. The regulating valve 32 is controlled.
さらに、湯はりの進行に伴い、貯湯タンク2が湯切れ状態となって、タンク内温度の検出値が、目標湯はり温度以下の温度に低下すると、制御装置60は、燃焼式熱源機4の作動を開始させる(バーナ41の燃焼運転を開始させる)と共に、混合割合調整弁32を一定の動作状態に保持する。 Furthermore, when the hot water storage tank 2 is in a state of running out of hot water as the hot water progresses, and the detected value of the tank temperature falls to a temperature equal to or lower than the target hot water temperature, the control device 60 causes the combustion heat source unit 4 to The operation is started (combustion operation of the burner 41 is started), and the mixing ratio adjusting valve 32 is held in a constant operating state.
そして、制御装置60は、温度センサ49の検出データにより示される温度検出値が、目標湯はり温度に所定の温度範囲内でほぼ一致するように、燃焼式熱源機4のバイパスサーボ弁45によるバイパス比と、バーナ41の燃焼量とを制御する。 Then, the control device 60 bypasses the bypass servo valve 45 of the combustion heat source unit 4 so that the temperature detection value indicated by the detection data of the temperature sensor 49 substantially matches the target hot water temperature within a predetermined temperature range. The ratio and the combustion amount of the burner 41 are controlled.
本実施形態の給湯システム1では、基本的には、以上の如く、貯湯タンク2内の湯水を加熱する運転、給湯対象場所の給湯口への給湯を行う給湯運転、及び浴槽Bへの湯はりを行う湯はり運転が行われる。 In the hot water supply system 1 of the present embodiment, basically, as described above, the operation for heating the hot water in the hot water storage tank 2, the hot water supply operation for supplying hot water to the hot water outlet at the hot water supply target place, and the hot water for the bathtub B Hot water operation is performed.
ここで、本実施形態は、浴槽Bの湯はり運転時には、制御装置60は、バイパス給水路24の逆止弁25,25の故障の発生の有無を検知するための処理も実行する。 Here, in the present embodiment, during the hot water operation of the bathtub B, the control device 60 also executes a process for detecting whether or not the check valves 25 and 25 of the bypass water supply passage 24 have failed.
以下、当該処理について説明する。リモコン61により、浴槽Bの湯はり運転(自動湯はり運転)を行うべき旨が指示されると、制御装置60は、前記湯はり弁46の開弁制御によって、浴槽Bへの通水を行わせつつ、図3のフローチャートに示す処理を実行する。 Hereinafter, the process will be described. When it is instructed by the remote controller 61 that the hot water operation of the bathtub B should be performed (automatic hot water operation), the control device 60 allows water to flow into the bathtub B by the valve opening control of the hot water valve 46. The process shown in the flowchart of FIG. 3 is executed.
STEP1において、制御装置60は、ヒートポンプ装置3の運転中(貯湯タンク2内の湯水の沸き上げ運転中)であるか否かを判断する。 In STEP 1, the control device 60 determines whether or not the heat pump device 3 is in operation (during hot water boiling operation in the hot water storage tank 2).
この判断結果が否定的である場合には、制御装置60は、STEP2において、浴槽Bへの湯はりの積算量(浴槽Bへの総通水量)が所定値(例えば10リットル)に達したか否かを判断し、その判断結果が肯定的になるまでSTEP2の判断処理を継続する。 If this determination result is negative, the controller 60 determines whether the accumulated amount of hot water to the bathtub B (total water flow amount to the bathtub B) has reached a predetermined value (for example, 10 liters) in STEP2. The determination process of STEP2 is continued until the determination result becomes affirmative.
そして、STEP2の判断結果が肯定的になると、制御装置60は、STEP3において、貯湯タンク2内の湯水の加熱を行うために、ヒートポンプ装置3の運転を開始させる。 And if the judgment result of STEP2 becomes affirmative, the control apparatus 60 will start the operation | movement of the heat pump apparatus 3 in order to heat the hot water in the hot water storage tank 2 in STEP3.
ここで、浴槽Bの湯はり運転では、浴槽Bへのトータルの通水量が多いため、該湯はり運転の途中で貯湯タンク2が湯切れ状態となる。このため、本実施形態では、湯はり運転の開始後、早期に、ヒートポンプ装置3の運転を開始させるようにしている。 Here, in the hot water operation of the bathtub B, since the total amount of water flowing into the bathtub B is large, the hot water storage tank 2 is in a hot water outage during the hot water operation. For this reason, in this embodiment, the operation of the heat pump apparatus 3 is started early after the start of the hot water operation.
なお、STEP2の判断結果が肯定的になるのを待ってから、ヒートポンプ装置3の運転を開始させるのは、次の理由による。すなわち、ユーザが誤って、湯はり運転の実行を指示する操作を行ってしまう場合もあり、その場合には、通常、STEP2の判断結果が肯定的になる前に、該湯はり運転の実行の指示が速やかに取り消される。ひいては、制御装置60は、湯はり弁46を閉弁制御して、浴槽Bへの通水を中止することとなる。 The reason why the operation of the heat pump device 3 is started after waiting for the determination result of STEP 2 to be positive is as follows. That is, the user may inadvertently perform an operation for instructing the execution of the hot water operation. In such a case, the execution of the hot water operation is usually performed before the determination result in STEP 2 becomes affirmative. Instructions are canceled promptly. Eventually, the control device 60 controls the hot water valve 46 to close, and stops water flow to the bathtub B.
このような場合には、STEP2の判断結果が肯定的にならないため、ヒートポンプ装置3の不要な運転を開始してしまうのが防止される。 In such a case, since the determination result of STEP 2 does not become affirmative, it is possible to prevent unnecessary operation of the heat pump device 3 from being started.
STEP1の判断結果が否定的である場合(ヒートポンプ装置3の運転が行われていない場合)には、制御装置60は、上記STEP2、3の処理を経て、STEP4の処理を実行する。また、STEP1の判断結果が肯定的である場合(ヒートポンプ装置3の運転が既に行われている場合)には、制御装置60は、上記STEP2、3の処理を実行することなく、STEP4の処理を実行する。 When the determination result of STEP 1 is negative (when the operation of the heat pump device 3 is not performed), the control device 60 performs the processing of STEP 4 through the processing of STEP 2 and 3 described above. Further, when the determination result of STEP 1 is affirmative (when the operation of the heat pump device 3 has already been performed), the control device 60 performs the processing of STEP 4 without executing the processing of STEP 2 and 3 above. Run.
STEP4では、制御装置60は、貯湯タンク2内の温度センサ15の検出データにより示されるタンク内温度の検出値が、リモコン61で設定された目標湯はり温度以下の温度であるか否かを判断する。このSTEP4の判断処理が、前記湯切れ検知部74により実行される判断処理である。 In STEP 4, the control device 60 determines whether or not the detected value of the tank temperature indicated by the detection data of the temperature sensor 15 in the hot water storage tank 2 is equal to or lower than the target hot water temperature set by the remote controller 61. To do. The determination process in STEP 4 is a determination process executed by the hot water detection unit 74.
この場合、STEP4の判断結果が否定的となる状態は、貯湯タンク2の湯切れ状態でない状態(貯湯タンク2から目標湯はり温度よりも高い温度の湯を出湯し得る状態)である。この状態では、制御装置60は、湯切れ検知部74によるSTEP4の判断処理を継続する。なお、この状況では、前記した混合割合調整弁32のフィードバック制御によって、浴槽Bに供給される湯水の温度が、目標湯はり温度に所定の温度範囲内でほぼ一致するように制御される。 In this case, the state in which the determination result in STEP 4 is negative is a state where the hot water storage tank 2 is not out of hot water (a state where hot water having a temperature higher than the target hot water temperature can be discharged from the hot water storage tank 2). In this state, the control device 60 continues the determination process of STEP4 by the hot water detection unit 74. In this situation, the temperature of the hot water supplied to the bathtub B is controlled to substantially match the target hot water temperature within a predetermined temperature range by the feedback control of the mixing ratio adjusting valve 32 described above.
浴槽Bの湯はりが進行すると、やがて、STEP4の判断結果が肯定的になる。すなわち、貯湯タンク2が湯切れ状態となる。 As the hot water in the bathtub B progresses, the determination result of STEP 4 becomes affirmative. That is, the hot water storage tank 2 is in a hot water condition.
このようにSTEP4の判断結果が肯定的になると、制御装置60は次に、STEP5において、浴槽Bに供給する湯水を燃焼式熱源機4で加熱するために、該燃焼式熱源機4の運転(バーナ41の燃焼運転)を開始させる。この燃焼式熱源機4の運転により、前記した如く、浴槽Bに供給される湯水の温度が、目標湯はり温度に所定の温度範囲内でほぼ一致するように制御される。 When the determination result in STEP 4 becomes affirmative in this way, the control device 60 then operates the combustion heat source unit 4 in order to heat the hot water supplied to the bathtub B by the combustion type heat source unit 4 in STEP 5 ( The combustion operation of the burner 41) is started. By the operation of the combustion heat source unit 4, the temperature of the hot water supplied to the bathtub B is controlled so as to substantially coincide with the target hot water temperature within a predetermined temperature range as described above.
さらに、制御装置60は、STEP6において、混合割合調整弁32を前記逆止弁故障検知用動作状態に制御する。 Further, in STEP 6, the control device 60 controls the mixing ratio adjustment valve 32 to the check valve failure detection operation state.
なお、本実施形態では、上記STEP5,6の処理は、前記温調制御部71により実行される処理である。 In the present embodiment, the processes of STEPs 5 and 6 are processes executed by the temperature control unit 71.
次いで、STEP7において、制御装置60は、混合割合調整弁32が逆止弁故障検知用動作状態に制御された状態でのバイパス給水流量Wb及び総給湯流量Wcの検出値を前記流量検出部72で取得する。 Next, in STEP 7, the control device 60 uses the flow rate detection unit 72 to detect the detected values of the bypass water supply flow rate Wb and the total hot water supply flow rate Wc when the mixing ratio adjustment valve 32 is controlled to the check valve failure detection operation state. get.
さらに、制御装置60は、STEP8において、バイパス給水流量Wb及び総給湯流量Wcの検出値の比率(Wb/Wc)(以降、流量比率Rという)に基づいて、いずれかの逆止弁25,25の故障が発生したか否かを判断する。 Further, in STEP 8, the control device 60 determines one of the check valves 25, 25 based on the ratio (Wb / Wc) of the detected values of the bypass water supply flow rate Wb and the total hot water supply flow rate Wc (hereinafter referred to as the flow rate ratio R). It is determined whether or not a failure has occurred.
このSTEP8の判断処理が前記故障検知部73により実行される判断処理である。この判断処理では、具体的には、制御装置60の故障検知部73は、上記流量比率Rが所定の判定閾値よりも小さいという状態が、所定時間(例えば10秒間)継続するという条件が成立するか否かを判断する。 This determination process of STEP 8 is a determination process executed by the failure detection unit 73. In this determination process, specifically, the failure detection unit 73 of the control device 60 satisfies the condition that the state in which the flow rate ratio R is smaller than a predetermined determination threshold value continues for a predetermined time (for example, 10 seconds). Determine whether or not.
そして、故障検知部73は、当該条件が成立した場合に、いずれかの逆止弁25の故障が発生したと判断し、当該条件が成立しない場合には、いずれかの逆止弁25の故障が発生していない(両方の逆止弁25,25が正常である)と判断する。 Then, the failure detection unit 73 determines that any check valve 25 has failed when the condition is satisfied. If the condition is not satisfied, the failure detection unit 73 fails any check valve 25. Is determined not to occur (both check valves 25, 25 are normal).
この場合、故障検知部73は、上記判定閾値を、図4のグラフで示すように、総給湯流量Wcの検出値に応じて可変的に設定する。 In this case, the failure detection unit 73 variably sets the determination threshold according to the detected value of the total hot water supply flow rate Wc, as shown in the graph of FIG.
ここで、図4に示すグラフaは、逆止弁25,25の両方が正常である場合における総給湯流量Wcと前記流量比率R(=Wb/Wc)との関係を例示するグラフ、グラフbは、いずれか一方の逆止弁25が閉弁状態に保持される故障が発生した場合における総給湯流量Wcと前記流量比率R(=Wb/Wc)との関係を例示するグラフである。なお、グラフa,bは、混合割合調整弁32の動作状態を前記逆止弁故障検知用動作状態で一定に維持した状態での実測データにより得られた一例のグラフである。 Here, the graph a shown in FIG. 4 is a graph illustrating the relationship between the total hot water supply flow rate Wc and the flow rate ratio R (= Wb / Wc) when both the check valves 25 and 25 are normal. These are graphs illustrating the relationship between the total hot water supply flow rate Wc and the flow rate ratio R (= Wb / Wc) when a failure occurs in which one of the check valves 25 is kept closed. Graphs a and b are graphs of an example obtained from actual measurement data in a state where the operation state of the mixing ratio adjusting valve 32 is kept constant in the check valve failure detection operation state.
これらのグラフa,bに示されるように、流量比率Rは、基本的には、総給湯流量Wcが大きいほど、小さくなる。そして、いずれか一方の逆止弁25が閉弁状態に保持される故障が発生した場合には、バイパス給水路24の流路抵抗が増加するために、流量比率Rは、逆止弁25,25の両方が正常である場合に比べて、小さくなる。 As shown in these graphs a and b, the flow rate ratio R basically decreases as the total hot water supply flow rate Wc increases. When a failure occurs in which one of the check valves 25 is kept closed, the flow resistance of the bypass water supply passage 24 increases, so that the flow rate ratio R is equal to the check valve 25, Compared to the case where both of 25 are normal, it becomes smaller.
特に、混合割合調整弁32の動作状態を前記逆止弁故障検知用動作状態で一定に維持した状態では、いずれか一方の逆止弁25が閉弁状態に保持される故障が発生した場合と、逆止弁25,25の両方が正常である場合とでは、総給湯流量Wcの幅広い範囲(例えば図4においてWc≧W1となる範囲)において、前者の場合(故障発生の場合)の流量比率Rが、後者の場合(正常な場合)の流量比率Rよりも顕著に小さなものとなる。 In particular, in a state where the operation state of the mixing ratio adjusting valve 32 is maintained constant in the operation state for detecting the check valve failure, a failure occurs in which one of the check valves 25 is held in the closed state. In the case where both the check valves 25 and 25 are normal, the flow rate ratio in the former case (when a failure occurs) in a wide range of the total hot water supply flow rate Wc (for example, a range where Wc ≧ W1 in FIG. 4). R is significantly smaller than the flow rate ratio R in the latter case (normal case).
そこで、本実施形態におけるSTEP8の判断処理では、故障検知部73は、図4に示す如く、総給湯流量Wcの検出値がW1≦Wc<W2となる範囲と、W2≦Wc<W3となる範囲と、W3≦Wc<W4となる範囲と、W4≦Wcとなる範囲とで、それぞれ、互いに異なる判定閾値Rth1,Rth2,Rth3,Rth4を設定する。 Therefore, in the determination process of STEP 8 in the present embodiment, the failure detection unit 73 has a range where the detected value of the total hot water supply flow rate Wc is W1 ≦ Wc <W2 and a range where W2 ≦ Wc <W3 as shown in FIG. Different thresholds Rth1, Rth2, Rth3, and Rth4 are set for the range of W3 ≦ Wc <W4 and the range of W4 ≦ Wc, respectively.
この場合、上記W1,W2,W3,W4は、あらかじめ実験等に基づいて決定した所定値であり、例えば、W1=8リットル/分、W2=10リットル/分、W3=12リットル/分、W4=18リットル/分である。 In this case, W1, W2, W3, and W4 are predetermined values determined in advance based on experiments or the like. For example, W1 = 8 liters / minute, W2 = 10 liters / minute, W3 = 12 liters / minute, W4 = 18 liters / minute.
また、判定閾値Rth1,Rth2,Rth3,Rth4は、総給湯流量Wcが大きいほど、小さくなるように、あらかじめ実験等に基づいて設定されている。一例として、Rth1,Rth2,Rth3,Rth4は、それぞれ、0.69,0.67,0.65,0.63である。 Further, the determination thresholds Rth1, Rth2, Rth3, and Rth4 are set in advance based on experiments or the like so as to decrease as the total hot water supply flow rate Wc increases. As an example, Rth1, Rth2, Rth3, and Rth4 are 0.69, 0.67, 0.65, and 0.63, respectively.
制御装置60の故障検知部73は、上記の如く総給湯流量Wcに応じて可変的に設定した判定閾値Rth1又はRth2又はRth3又はRth4を用いて、STEP8の判断処理を実行する。これにより、いずれかの逆止弁25,25の故障(閉弁状態に保持される故障)が発生したか否かが適切に判断される。 The failure detection unit 73 of the control device 60 performs the determination process of STEP 8 using the determination threshold value Rth1, Rth2, Rth3, or Rth4 variably set according to the total hot water supply flow rate Wc as described above. Thereby, it is appropriately determined whether or not a failure of one of the check valves 25, 25 (failure held in a closed state) has occurred.
この場合、R<判定閾値となる状態が、所定時間(10秒)継続することを必要条件として、いずれかの逆止弁25,25の故障が発生したと判断されるので、給水圧の一時的な変動等に起因して、一時的にR<判定閾値となった場合に、直ちに、いずれかの逆止弁25,25の故障が発生したものと判断されてしまうようなことを防止できる。 In this case, since it is determined that a failure has occurred in any one of the check valves 25 and 25 on the condition that the state where R <determination threshold value is continued for a predetermined time (10 seconds), the water supply pressure is temporarily reduced. It is possible to prevent the occurrence of a failure of any one of the check valves 25 and 25 immediately when R <determination threshold value is temporarily satisfied due to a dynamic fluctuation or the like. .
なお、総給湯流量Wcが上記W1よりも小さい場合には、いずれか一方の逆止弁25が閉弁状態に保持される故障が発生した場合と、逆止弁25,25の両方が正常である場合とで、流量比率Rの顕著な相違が生じ難くなる。このため、本実施形態では、故障検知部73は、総給湯流量Wcの検出値がW1以上であることを必要条件として、逆止弁25,25の故障が発生したか否かの実質的な判断を行う。そして、STEP8において、総給湯流量Wcの検出値がW1よりも小さい場合には、故障検知部73は、暫定的に、逆止弁25,25の故障が発生していないものとみなす。 When the total hot water supply flow rate Wc is smaller than W1, a failure occurs in which one of the check valves 25 is kept closed, and both the check valves 25 and 25 are normal. In some cases, a significant difference in the flow rate ratio R is less likely to occur. For this reason, in this embodiment, the failure detection unit 73 substantially determines whether or not a failure has occurred in the check valves 25 and 25 on the condition that the detected value of the total hot water supply flow rate Wc is W1 or more. Make a decision. In STEP 8, when the detected value of the total hot water supply flow rate Wc is smaller than W1, the failure detection unit 73 tentatively assumes that the check valves 25 and 25 have not failed.
以上のSTEP8の判断処理によって、いずれかの逆止弁25,25の故障の発生の有無を高い信頼性で適切に検知できることとなる。 Through the determination process in STEP 8 described above, the presence or absence of a failure of any one of the check valves 25 and 25 can be appropriately detected with high reliability.
補足すると、本実施形態では、浴槽Bの湯はり運転時に、上記STEP6で混合割合調整弁32が逆止弁故障検知用動作状態に制御され、且つ、総給湯流量Wcが、所定値W1以上となっている状態が、本発明における特定状態に相当する状態である。 Supplementally, in the present embodiment, during the hot water operation of the bathtub B, the mixing ratio adjusting valve 32 is controlled to the check valve failure detection operation state in STEP 6 and the total hot water supply flow rate Wc is equal to or greater than the predetermined value W1. This state is a state corresponding to the specific state in the present invention.
STEP8の判断結果が否定的である場合(逆止弁25,25の両方が正常であると判断された場合)には、制御装置60は、STEP9において、浴槽Bの湯はりが完了したか否かを判断する。この場合、図示しないセンサにより検出される浴槽B内の湯量が、リモコン61であらかじめ設定された目標湯量に達したか否かによって、浴槽Bの湯はりが完了したか否かが判断される。 When the determination result of STEP 8 is negative (when it is determined that both the check valves 25 and 25 are normal), the control device 60 determines whether or not the hot water in the bathtub B is completed in STEP 9. Determine whether. In this case, whether or not the hot water in the bathtub B has been completed is determined based on whether or not the amount of hot water in the bathtub B detected by a sensor (not shown) has reached the target hot water amount set in advance by the remote controller 61.
そして、STEP9の判断結果が否定的である場合には、制御装置60は、STEP7〜9の判断処理を繰り返す。また、STEP9の判断結果が肯定的になった場合には、制御装置60は、STEP12で燃焼式熱源機4の運転を停止し、図3のフローチャートの処理を終了する。 And when the judgment result of STEP9 is negative, the control apparatus 60 repeats the judgment process of STEP7-9. If the determination result in STEP 9 is affirmative, the control device 60 stops the operation of the combustion heat source unit 4 in STEP 12 and ends the process of the flowchart of FIG.
一方、STEP8の判断結果が肯定的である場合(いずれかの逆止弁25の故障が発生したと判断された場合)には、制御装置60は、STEP10の処理(異常対応処理)を前記異常対応処理部75により実行する。 On the other hand, when the determination result of STEP 8 is affirmative (when it is determined that a failure of any one of the check valves 25 has occurred), the control device 60 performs the process of STEP 10 (abnormality response process) as the abnormality. It is executed by the correspondence processing unit 75.
この処理では、異常対応処理部75は、ヒートポンプ装置3の運転を停止させ、さらに、該ヒートポンプ装置3の以後の運転を禁止する。 In this process, the abnormality handling processing unit 75 stops the operation of the heat pump device 3 and further prohibits the subsequent operation of the heat pump device 3.
さらに、STEP10では、異常対応処理部75は、いずれかの逆止弁25の故障が発生した旨の報知出力を発生する。具体的には、異常対応処理部75は、例えばリモコン61の表示器61aに、当該故障の発生を示すエラー情報を表示させる。これにより、ユーザは、当該故障の発生を認識して、業者への連絡等を行うことができる。 Further, in STEP 10, the abnormality handling processing unit 75 generates a notification output indicating that any one of the check valves 25 has failed. Specifically, the abnormality handling processing unit 75 displays error information indicating the occurrence of the failure on, for example, the display 61a of the remote controller 61. As a result, the user can recognize the occurrence of the failure and contact the supplier.
なお、当該故障の発生の報知は、視覚的なものに限らず、音声等による聴覚的な報知であってもよい。また、STEP10の異常対応処理は、上記以外の処理を含んでいてもよい。 The notification of the occurrence of the failure is not limited to visual information, but may be an auditory notification by voice or the like. Further, the abnormality handling process in STEP 10 may include processes other than those described above.
STEP10の処理に続いて、制御装置60は、STEP11で浴槽Bの湯はりが完了したか否かを判断することをSTEP9と同様に行う。そして、湯はりが完了すると(STEP11の判断結果が肯定的になると)、制御装置60は、前記STEP12で燃焼式熱源機4の運転を停止し、図3のフローチャートの処理を終了する。 Subsequent to the processing of STEP 10, the control device 60 determines whether or not the hot water filling of the bathtub B is completed in STEP 11 as in STEP 9. When the hot water filling is completed (when the determination result in STEP 11 becomes affirmative), the control device 60 stops the operation of the combustion heat source unit 4 in STEP 12 and ends the processing of the flowchart of FIG.
本実施形態の給湯システム1では、以上の如く、浴槽Bの湯はりを行う湯はり運転時に、いずれかの逆止弁25,25の故障の発生の有無を検知するための処理を実行される。 In the hot water supply system 1 according to the present embodiment, as described above, the process for detecting whether or not a failure of any one of the check valves 25 and 25 has occurred is performed during the hot water operation in which the hot water is poured in the bathtub B. .
以上説明した本実施形態の給湯システム1では、バイパス給水路24に2つの逆止弁25,25が備えられている。このため、貯湯タンク2に目標給湯温度あるいは目標湯はり温度よりも高い温度の湯水が溜まっている状態(湯切れ状態でない状態)で、いずれかの一方の逆止弁25が閉弁状態に保持される故障が発生しても、混合割合調整弁32の動作制御によって、給湯口又は浴槽Bに供給される湯水の温度を、目標給湯温度あるいは目標湯はり温度に一致もしくはほぼ一致する温度に制御できる。 In the hot water supply system 1 of this embodiment described above, the bypass water supply path 24 is provided with two check valves 25 and 25. For this reason, one of the check valves 25 is kept in a closed state in a state where hot water having a temperature higher than the target hot water supply temperature or the target hot water temperature is accumulated in the hot water storage tank 2 (a state where the hot water does not run out). Even if a failure occurs, the temperature of the hot water supplied to the hot water outlet or the bathtub B is controlled to a temperature that matches or substantially matches the target hot water temperature or the target hot water temperature by controlling the operation of the mixing ratio adjusting valve 32. it can.
また、給水路21及び給湯路31での通水が比較的長い時間にわたって継続する浴槽Bの湯はり運転時に、貯湯タンク2が湯切れ状態となった場合、すなわち貯湯タンク2から目標湯はり温度よりも高温の湯を出湯できなくなった場合に、混合割合調整弁32を強制的に逆止弁故障検知用動作状態に制御した上で、前記流量比率Rに基づいて、いずれかの逆止弁25,25の故障の発生の有無が検知される。 In addition, when the hot water storage tank 2 becomes hot during the hot water operation of the bathtub B in which water flow through the water supply channel 21 and the hot water supply channel 31 continues for a relatively long time, that is, the target hot water temperature from the hot water storage tank 2 is reached. When hot water having a temperature higher than that cannot be discharged, the mixing ratio adjusting valve 32 is forcibly controlled to an operation state for detecting a check valve failure, and one of the check valves is controlled based on the flow rate ratio R. The presence / absence of occurrence of failures 25 and 25 is detected.
この場合、前記流量比率Rに基づく当該故障の発生の有無の検知は、前記流量比率Rが比較的安定し、且つ、いずれかの逆止弁25,25の故障が発生している場合と両方の逆止弁25,25が正常である場合とで顕著な相違が生じ得る状態にて行われる。 In this case, detection of the occurrence of the failure based on the flow rate ratio R is performed both when the flow rate ratio R is relatively stable and a failure of any one of the check valves 25 and 25 occurs. The check valve 25, 25 is performed in a state in which a significant difference can occur from the case where the check valve 25 is normal.
また、この場合、いずれかの逆止弁25,25の故障が発生したと判断されることは、総給湯流量Wcの検出値が所定値W1以上であることと、R<判定閾値となる状態が所定時間以上継続することとを必要条件として行われる。さらに、流量比率Rと大小関係を比較する判定閾値は、総給湯流量Wcの検出値に応じて可変的に設定される。 Further, in this case, it is determined that the failure of any one of the check valves 25, 25 is that the detected value of the total hot water supply flow rate Wc is equal to or greater than the predetermined value W1, and R <determination threshold value. Is performed as a necessary condition that it continues for a predetermined time or more. Furthermore, the determination threshold value for comparing the flow rate ratio R with the magnitude relationship is variably set according to the detected value of the total hot water supply flow rate Wc.
このため、いずれかの逆止弁25の故障の発生の有無の検知を高い信頼性で適切に行うことができる。 For this reason, the presence or absence of the failure of any one of the check valves 25 can be appropriately detected with high reliability.
ひいては、いずれかの逆止弁25,25の故障が発生した場合における前記異常対応処理部75の処理(STEP10の処理)を適切なタイミングで行うことができる。 As a result, when the failure of any one of the check valves 25, 25 occurs, the process of the abnormality handling processing unit 75 (the process of STEP 10) can be performed at an appropriate timing.
なお、本発明は、前記した実施形態に限定されるものではない。以下に、前記実施形態の変形態様をいくつか説明する。 The present invention is not limited to the embodiment described above. In the following, some modifications of the embodiment will be described.
前記実施形態では、バイパス給水流量Wb及び総給湯流量Wcの検出値の比率(Wb/Wc)である流量比率Rに基づいて、いずれかの逆止弁25,25の故障の発生の有無を検知するようにした。ただし、例えば上記流量比率Rの逆数値(=Wc/Wb)、あるいは、前記タンク出湯流量Waと総給湯流量Wcとの比率(Wa/Wc又はWc/Wa)、あるいは、バイパス給水流量Wbとタンク出湯流量Waとの比率(Wb/Wa又はWa/Wb)に基づいて、いずれかの逆止弁25,25の故障の発生の有無を検知するようにしてもよい。 In the embodiment, the presence or absence of failure of any one of the check valves 25 and 25 is detected based on the flow rate ratio R which is the ratio (Wb / Wc) of the detected values of the bypass water supply flow rate Wb and the total hot water supply flow rate Wc. I tried to do it. However, for example, the reciprocal value of the flow rate ratio R (= Wc / Wb), or the ratio (Wa / Wc or Wc / Wa) between the tank discharge flow rate Wa and the total hot water supply flow rate Wc, or the bypass supply water flow rate Wb and the tank. Based on the ratio (Wb / Wa or Wa / Wb) to the hot water flow rate Wa, the presence or absence of a failure of any one of the check valves 25, 25 may be detected.
ここで、Wa+Wb=Wcであるので、Wb/Wc<判定閾値となることは、Wa/Wc>1−判定閾値であること、あるいは、Wa/Wb>(1/判定閾値)−1であることと等価である。 Here, since Wa + Wb = Wc, Wb / Wc <determination threshold is Wa / Wc> 1−determination threshold or Wa / Wb> (1 / determination threshold) −1. Is equivalent to
従って、前記流量比率R(=Wb/Wc)の代わりに、Wa/Wc、あるいは、Wa/Wbに基づいて当該故障の発生の有無を検知することができる。さらには、これらの比率の逆数値(Wc/Wb、あるいは、Wc/Wa、あるいは、Wb/Wa)に基づいて当該故障の発生の有無を検知することができることはもちろんである。 Therefore, it is possible to detect the occurrence of the failure based on Wa / Wc or Wa / Wb instead of the flow rate ratio R (= Wb / Wc). Furthermore, the occurrence of the failure can be detected based on the reciprocal value (Wc / Wb, Wc / Wa, or Wb / Wa) of these ratios.
さらに、Wa,Wb,Wcのうちのいずれか2つの流量の検出値の組から、例えば、マップを用いて当該故障の発生の有無を検知することも可能である。 Furthermore, it is also possible to detect the occurrence of the failure using a map, for example, from a set of detection values of any two of Wa, Wb, and Wc.
また、前記実施形態では、バイパス給水流量Wb及びタンク出湯流量Waをそれぞれ検出する流量センサ26,33を備えた。但し、例えば、Wb及びWaのいずれか一方の代わりに、あるいは、これらに加えて、総給湯流量Wcを検出する流量センサを混合割合調整弁32の出口ポートの下流側に備えるようにしてもよい。 Moreover, in the said embodiment, the flow rate sensors 26 and 33 which each detect the bypass feed water flow rate Wb and the tank tapping flow rate Wa were provided. However, for example, instead of or in addition to one of Wb and Wa, a flow rate sensor for detecting the total hot water supply flow rate Wc may be provided on the downstream side of the outlet port of the mixing ratio adjusting valve 32. .
また、前記実施形態では、浴槽Bの湯はりを行う湯はり運転時にだけ、いずれかの逆止弁25,25の故障の発生の有無を検知するようにした。ただし、例えば、給湯対象場所の給湯口に給湯する給湯運転中に、貯湯タンク2が湯切れ状態となった場合(タンク内温度の検出値が目標給湯温度以下になった場合)に、混合割合調整弁32を逆止弁故障検知用動作状態に制御した上で、Wa,Wb,Wcのうちの2つの流量の検出値に基づいて、いずれかの逆止弁25,25の故障の発生の有無を検知するようにしてもよい。 Moreover, in the said embodiment, the presence or absence of generation | occurrence | production of the failure of any one of the non-return valves 25 and 25 was detected only at the time of the hot water operation which hot waters the bathtub B. However, for example, when the hot water storage tank 2 becomes hot during hot water supply operation to supply hot water at a hot water supply target location (when the detected value of the temperature in the tank falls below the target hot water supply temperature), the mixing ratio After controlling the regulating valve 32 to the check valve failure detection operation state, the occurrence of a failure of any one of the check valves 25 and 25 is determined based on the detected values of the two flow rates of Wa, Wb and Wc. The presence or absence may be detected.
さらには、貯湯タンク2が湯切れ状態となっていない場合であっても、給湯運転中あるいは湯はり運転中に、混合割合調整弁32が、逆止弁故障検知用動作状態もしくはこれに近い動作状態に制御された状態で、Wa,Wb,Wcのうちの2つの流量の検出値に基づいて、いずれかの逆止弁25,25の故障の発生の有無を検知することも可能である。 Furthermore, even when the hot water storage tank 2 is not in a hot water outage state, the mixing ratio adjusting valve 32 is in an operation state for detecting a check valve failure or an operation close thereto during a hot water supply operation or a hot water operation. In the state controlled by the state, it is also possible to detect the presence or absence of failure of any one of the check valves 25 and 25 based on the detected values of the flow rates of two of Wa, Wb and Wc.
また、前記実施形態では、第1熱源機3がヒートポンプ装置であり、第2熱源機4が燃焼式熱源機である給湯システム1について説明したが、第1熱源機3、第2熱源機4は、前記実施形態と異なる種類の熱源機であってもよい。 Moreover, in the said embodiment, although the 1st heat source machine 3 was a heat pump apparatus and the 2nd heat source machine 4 demonstrated the hot water supply system 1 which is a combustion type heat source machine, the 1st heat source machine 3 and the 2nd heat source machine 4 are The heat source machine may be of a different type from the above embodiment.
1…給湯システム、2…貯湯タンク、3…ヒートポンプ装置(第1熱源機)、4…燃焼式熱源機(第2熱源機)、21…給水路、24…バイパス給水路、24a…通水路、25…逆止弁、31…給湯路、32…混合割合調整弁、71…温調制御部(温調制御手段)、72…流量検出部(流量検出手段)、73…故障検知部(故障検知手段)、74…湯切れ検知部(湯切れ検知手段)、75…異常対応処理部(異常対応処理手段)、B…浴槽。 DESCRIPTION OF SYMBOLS 1 ... Hot water supply system, 2 ... Hot water storage tank, 3 ... Heat pump apparatus (1st heat source machine), 4 ... Combustion type heat source machine (2nd heat source machine), 21 ... Water supply path, 24 ... Bypass water supply path, 24a ... Water flow path, 25 ... Check valve, 31 ... Hot water supply path, 32 ... Mixing ratio adjustment valve, 71 ... Temperature control unit (temperature control unit), 72 ... Flow rate detection unit (flow rate detection unit), 73 ... Failure detection unit (failure detection) Means), 74 ... Hot water detection part (hot water detection means), 75 ... Abnormality response processing part (abnormality response processing means), B ... Bathtub.
Claims (9)
前記バイパス給水路は、前記給水路と給湯路との間で互いに並列に接続された2つの通水路を備えており、
前記逆止弁は、前記バイパス給水路の2つの通水路のそれぞれに設けられており、
前記接続箇所に前記貯湯タンクから流入する湯水の流量である第1流量と、前記接続箇所に前記バイパス給水路から流入する水の流量である第2流量と、前記接続箇所から前記給湯路の下流側に流れる湯水の流量である第3流量とのうちの少なくとも2つの流量を検出する流量検出手段と、
前記混合割合調整弁があらかじめ定められた所定の動作状態に制御されているという条件を少なくとも満たす特定状態で前記給水路及び給湯路の通水が行われる運転中に前記流量検出手段により得られた2つの流量の検出値に基づいて、前記バイパス給水路に設けられた逆止弁のうちのいずれかの逆止弁の故障の発生の有無を検知する故障検知手段と、
該故障検知手段により前記いずれかの逆止弁の故障の発生が検知された場合に、あらかじめ定められた異常対応処理を実行する異常対応処理手段とを備えることを特徴とする給湯システム。 A hot water storage tank, a first heat source device for heating hot water in the hot water storage tank, a water supply path and a hot water supply path connected to the hot water storage tank, and the water supply path are connected to the hot water supply path by bypassing the hot water storage tank A mixing ratio configured to variably control a mixing ratio of hot water flowing from the hot water storage tank and water flowing from the bypass water supply path to a bypass water supply path, and a connection portion between the hot water supply path and the bypass water supply path In order to control the temperature of the hot water flowing through the hot water supply path on the downstream side of the adjustment valve, the check valve provided in the bypass water supply path so as to prevent the backflow of water in the bypass water supply path As a control process, a hot water supply system comprising at least a temperature control means configured to execute a process for controlling the mixing ratio adjusting valve,
The bypass water supply path includes two water flow paths connected in parallel between the water supply path and the hot water supply path,
The check valve is provided in each of the two water passages of the bypass water supply passage,
A first flow rate that is a flow rate of hot water flowing into the connection location from the hot water storage tank, a second flow rate that is a flow rate of water flowing from the bypass water supply channel to the connection location, and a downstream of the hot water supply channel from the connection location. Flow rate detection means for detecting at least two of the third flow rates, which are flow rates of hot water flowing to the side,
Obtained by the flow rate detection means during the operation in which the water supply passage and the hot water supply passage are conducted in a specific state satisfying at least the condition that the mixing ratio adjusting valve is controlled to a predetermined predetermined operation state. A failure detection means for detecting the presence or absence of failure of any one of the check valves provided in the bypass water supply path, based on two flow rate detection values;
A hot water supply system comprising: an abnormality response processing means for executing a predetermined abnormality response process when the failure detection means detects the occurrence of a failure of any one of the check valves.
前記故障検知手段は、前記2つの流量の検出値の比率と所定の判定閾値との大小関係の判定結果に基づいて、前記いずれかの逆止弁の故障の発生の有無を検知するように構成されていることを特徴とする給湯システム。 The hot water supply system according to claim 1,
The failure detection means is configured to detect whether or not a failure of any one of the check valves has occurred based on a determination result of a magnitude relationship between a ratio between the detected values of the two flow rates and a predetermined determination threshold. Hot water supply system characterized by being.
前記流量検出手段が検出する流量は前記第3流量を含んでおり、
前記故障検知手段は、前記第3流量の検出値に応じて前記所定の判定閾値を可変的に設定する機能を含むことを特徴とする給湯システム。 The hot water supply system according to claim 2,
The flow rate detected by the flow rate detection means includes the third flow rate,
The hot water supply system, wherein the failure detection means includes a function of variably setting the predetermined determination threshold value according to a detection value of the third flow rate.
前記故障検知手段は、前記比率と前記所定の判定閾値との大小関係が、あらかじめ定められた関係となる状態が、所定時間以上継続した場合に、前記いずれかの逆止弁の故障の発生を検知するように構成されていることを特徴とする給湯システム。 In the hot water supply system according to claim 2 or 3,
The failure detection means detects the occurrence of a failure of any one of the check valves when a state in which the magnitude relationship between the ratio and the predetermined determination threshold is a predetermined relationship continues for a predetermined time or more. A hot water supply system configured to detect.
前記流量検出手段が検出する流量は前記第3流量を含んでおり、
前記特定状態は、前記混合割合調整弁が前記所定の動作状態に制御されているという条件に加えて、前記第3流量の検出値が所定値以上であるという条件をさらに満たす状態であることを特徴とする給湯システム。 In the hot water supply system according to any one of claims 1 to 4,
The flow rate detected by the flow rate detection means includes the third flow rate,
The specific state is a state that further satisfies the condition that the detected value of the third flow rate is a predetermined value or more in addition to the condition that the mixing ratio adjusting valve is controlled to the predetermined operation state. A hot water supply system that is characteristic.
前記混合割合調整弁の前記所定の動作状態は、前記バイパス給水路に設けられた全ての前記逆止弁が正常である場合における前記給水路及び給湯路の通水時に、前記第1流量よりも前記第2流量の方が大きくなる動作状態であることを特徴とする給湯システム。 In the hot water supply system according to any one of claims 1 to 5,
The predetermined operation state of the mixing ratio adjusting valve is greater than the first flow rate when water flows through the water supply channel and the hot water supply channel when all the check valves provided in the bypass water supply channel are normal. The hot water supply system is in an operating state in which the second flow rate is larger.
前記貯湯タンクの湯切れ状態を検知する湯切れ検知手段と、
前記接続箇所から前記給湯路の下流側に流れる湯水を加熱する第2熱源機とをさらに備えており、
前記温調制御手段は、前記給湯路からの出湯を行う運転中に、前記湯切れ検知手段により前記貯湯タンクの湯切れ状態が検知された場合に、前記第2熱源機を作動させると共に、前記混合割合調整弁を前記所定の動作状態に保持するように構成されており、
前記特定状態に係る前記所定の動作状態は、前記湯切れ検知手段により前記貯湯タンクの湯切れ状態が検知されたことに応じて前記温調制御手段により前記混合割合調整弁を制御してなる動作状態であることを特徴とする給湯システム。 In the hot water supply system according to any one of claims 1 to 6,
A hot water detection means for detecting a hot water condition of the hot water storage tank,
A second heat source machine for heating hot water flowing from the connection location to the downstream side of the hot water supply path,
The temperature control control means operates the second heat source machine when the hot water outage detection means detects the hot water outage state of the hot water storage tank during the operation of discharging hot water from the hot water supply passage, and The mixing ratio adjusting valve is configured to hold the predetermined operation state,
The predetermined operation state related to the specific state is an operation formed by controlling the mixing ratio adjusting valve by the temperature control means in response to detection of a hot water condition of the hot water storage tank by the hot water detection means. A hot water supply system characterized by being in a state.
前記給湯路は、浴槽に給湯し得るように該浴槽に接続されており、前記特定状態に係る前記所定の動作状態は、前記浴槽への湯はりを行う湯はり運転中に、前記湯切れ検知手段により前記貯湯タンクの湯切れ状態が検知されたことに応じて前記温調制御手段により前記混合割合調整弁を制御してなる動作状態であることを特徴とする給湯システム。 The hot water supply system according to claim 7,
The hot water supply path is connected to the bathtub so as to supply hot water to the bathtub, and the predetermined operation state related to the specific state is the hot water detection during hot water operation for hot water to the bathtub. The hot water supply system is in an operating state in which the mixing ratio adjusting valve is controlled by the temperature control means in response to detection of a hot water condition in the hot water storage tank by means.
前記異常対応処理手段が実行する前記異常対応処理は、前記第1熱源機の作動を禁止する処理と、前記いずれかの逆止弁の故障が発生した旨を報知する処理とを含むことを特徴とする給湯システム。
The hot water supply system according to any one of claims 1 to 8,
The abnormality handling process executed by the abnormality handling process means includes a process for prohibiting the operation of the first heat source unit and a process for notifying that any one of the check valves has failed. Hot water supply system.
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