JP6299482B2

JP6299482B2 - Water heater

Info

Publication number: JP6299482B2
Application number: JP2014129480A
Authority: JP
Inventors: 小西　大輔; 大輔小西
Original assignee: Noritz Corp
Current assignee: Noritz Corp
Priority date: 2014-06-24
Filing date: 2014-06-24
Publication date: 2018-03-28
Anticipated expiration: 2034-06-24
Also published as: JP2016008770A

Description

本発明は、缶体内において燃焼熱との熱交換加熱により給水を所定の高温度まで昇温させ、生成された高温湯を給湯栓等に至る一般給湯路と、浴槽に至る高温差し湯路との２方向に供給可能とされ、浴槽に対し高温差し湯路を通して高温湯の差し湯（以下「高温差し湯」という）をすることにより、湯張り後の浴槽内の湯水を昇温させて追い焚きと同等の役割を果たし得る高温差し湯機能付きの給湯装置に関し、特に、高温差し湯路を介して浴槽に至る経路内の温度を検出するための温度センサのシフト故障の発生を判定・検知するための技術に係る。ここで、シフト故障とは、断線，短絡又は検出温度の固着等に起因する検出温度値の異常とは異なり、温度センサのセンサ部品の不良又はその経年劣化に起因して、検出温度の値が実際の温度の値よりも高温側又は低温側にずれ（シフト）が生じる異常のことをいう。 The present invention increases the temperature of the water supply to a predetermined high temperature by heat exchange heating with the combustion heat in the can, and the generated hot water to the hot water tap and the like, and the hot water supply path to the bathtub It can be supplied in two directions, and the hot water in the bathtub after filling is heated to follow the hot water hot water through the hot water hot water passage (hereinafter referred to as “hot hot water hot water”). With regard to a hot water supply device with a high-temperature hot water supply function that can play a role equivalent to that of watering, in particular, it is judged and detected the occurrence of a shift failure of the temperature sensor for detecting the temperature in the path to the bathtub through the high-temperature hot water supply passage Related to technology. Here, the shift failure is different from the abnormality of the detected temperature value due to disconnection, short circuit, detection temperature fixation, etc., and the detected temperature value is caused by a defective sensor component of the temperature sensor or its aging deterioration. This is an abnormality in which a shift (shift) occurs on the high temperature side or the low temperature side from the actual temperature value.

特許文献１では、浴槽内に湯張りされた湯水を追い焚きする代わりに、高温の湯水を浴槽に差し湯（高温差し湯）することにより昇温させる高温差し湯機能付きの給湯装置が提案されている。又、特許文献２では、缶体から、給湯栓等に至る給湯路と、浴槽に至る追焚回路とが分岐され、缶体からの湯が２方向に供給可能とされた風呂釜において、缶体から分岐点に給湯される給湯温度センサによる検出温度と、追焚回路の経路に設置された追焚温度センサによる検出温度との間に所定値以上の温度差が生じれば、風呂釜の運転を停止させることが提案されている。 Patent Document 1 proposes a hot water supply device with a hot water hot water function that raises the temperature by pouring hot water into a bathtub (high temperature hot water) instead of chasing hot water filled in the bathtub. ing. Further, in Patent Document 2, a hot water supply path from a can body to a hot water tap or the like and a memorial circuit to a bathtub are branched so that hot water from the can body can be supplied in two directions. If a temperature difference of more than a predetermined value occurs between the temperature detected by the hot water temperature sensor supplied from the body to the branch point and the temperature detected by the memory temperature sensor installed in the path of the memory circuit, It has been proposed to stop operation.

特許第３９９４９２０号公報Japanese Patent No. 3994920 特開平１１−２７０９００号公報JP 11-270900 A

ところで、高温差し湯機能付きの給湯装置においては、例えばリモコンの差し湯スイッチのＯＮ操作により、高温差し湯路を通して浴槽に対し所定温度（例えば８０℃）に制御された高温湯を差し湯する差し湯運転が実行されるように構成される。ところが、浴槽が空の状態であるにも拘わらず、ユーザーが誤って差し湯スイッチをＯＮ操作してしまうと、空の浴槽に対し高温の湯が差し湯されてしまうことになる。この際、高温差し湯は浴槽に設置されたアダプタを通して浴槽に流入することになるが、このアダプタが、形状記憶合金を用いた自動閉止機構を内蔵し浴槽が空の状態で高温差し湯（例えば８０℃以上の湯）に接触すると弁が自動的に閉止状態に変形して流通を遮断（自動閉止）するというタイプのアダプタであると、前記の温度センサのシフト故障の発生に起因して次のような不都合発生が考えられる。すなわち、本来は、缶体からの出湯温度の検出に基づいて所定の設定差し湯温度になるように加熱制御された高温差し湯が浴槽に差し湯されるようになっているため、設定差し湯温度が例えば８０℃であれば、ユーザーの誤操作に基づき浴槽に高温差し湯が行われたとしても、その８０℃の高温差し湯と接触したアダプタの自動閉止機構が作動して空の浴槽への高温差し湯は回避可能となる。しかしながら、出湯温度が設定差し湯温度になるように制御するための温度センサ（例えば缶体温度センサ）にシフト故障が生じており、例えば実際には７０℃の湯であるにも拘わらず、８０℃と検出してしまい、これに基づいて７０℃の高温差し湯が浴槽のアダプタに供給されると、自動閉式機能は作動せず、７０℃の高温差し湯が空の浴槽にそのまま流入されてしまうことになる。 By the way, in a hot water supply apparatus with a hot water hot water function, for example, by hot water hot water switch on the remote control to be turned on, hot water controlled to a predetermined temperature (for example, 80 ° C.) is poured into the bathtub through the hot water hot water path. The hot water operation is configured to be executed. However, if the user accidentally turns on the hot water switch even though the bathtub is empty, hot water is poured into the empty bathtub. At this time, the hot water hot water flows into the bathtub through an adapter installed in the bathtub. However, this adapter incorporates an automatic closing mechanism using a shape memory alloy, and the hot water hot water (for example, in the state where the bathtub is empty) If the adapter is of a type in which the valve is automatically deformed into a closed state and shuts off the flow (automatically closed) when it comes into contact with hot water (80 ° C. or higher), the following occurs due to the occurrence of the shift failure of the temperature sensor. Such inconveniences can be considered. That is, since the hot water hot water that is heated and controlled so as to reach the predetermined hot water temperature based on the detection of the hot water temperature from the can body is originally poured into the bathtub, If the temperature is, for example, 80 ° C., even if a hot bath is performed on the bathtub based on an erroneous operation by the user, the automatic closing mechanism of the adapter that comes into contact with the hot bath of 80 ° C. Hot water can be avoided. However, a shift failure has occurred in a temperature sensor (for example, a can body temperature sensor) for controlling the tapping temperature to be the set hot water temperature. If a high temperature hot water of 70 ° C. is supplied to the adapter of the bathtub based on this, the automatic closing function does not operate, and the high temperature hot water of 70 ° C. flows into the empty bathtub as it is. Will end up.

かかる不都合発生に対処すべく、高温差し湯路を介して浴槽に至る経路に温度センサを設置し、前記経路内の湯の温度を検出可能とすることが考えられる。しかしながら、この温度センサにもシフト故障発生のおそれはあるため、双方の検出値が食い違った場合には、いずれが異常なのかの判別は困難となり、その結果、前述のユーザーの誤操作に起因する空の浴槽に対する高温差し湯の流入を回避することは不能となる。 In order to deal with such an inconvenience, it is conceivable that a temperature sensor is installed in a path leading to the bathtub through the high temperature hot water supply path so that the temperature of the hot water in the path can be detected. However, since there is a risk of a shift failure in this temperature sensor, it is difficult to determine which one is abnormal when the two detected values are different from each other. It is impossible to avoid the flow of hot water into the bathtub.

本発明は、このような事情に鑑みてなされたものであり、その目的とするところは、高温差し湯機能付きの給湯装置において、差し湯運転に係る温度センサのシフト故障の発生を確実に検知し得る給湯装置を提供することにある。 The present invention has been made in view of such circumstances, and an object thereof is to reliably detect the occurrence of a shift failure of a temperature sensor related to a hot water supply operation in a hot water supply device having a high temperature hot water supply function. It is in providing the hot water supply apparatus which can do.

前記目的を達成するために、第１の発明では、給水路からの給水を受けて加熱するための缶体の出湯側において、浴槽に差し湯するための高温差し湯路と、給湯栓に給湯するための一般給湯路とが分岐され、前記一般給湯路は、前記高温差し湯路との分岐位置よりも下流側位置において前記給水路から分岐したバイパス路の下流端が合流し、さらにこの合流位置よりも下流側位置から、浴槽に対し注湯して湯張りするための注湯路の上流端が分岐され、この注湯路の下流側において前記高温差し湯路の下流側とが互いに合流されている給湯装置を対象に、次の特定事項を備えることとした。すなわち、前記缶体から出湯される湯の温度を検出するための缶体温度センサと、前記バイパス路との合流位置よりも下流側位置において前記注湯路を通して注湯される湯の温度を検出するための給湯温度センサと、前記高温差し湯路と前記注湯路との合流位置よりも下流側位置を通る湯の温度を検出するふろ経路温度センサと、前記浴槽に対する差し湯に係る温度センサの異常を判定するための温度センサ異常判定処理手段とを備えることとする。そして、前記センサ異常判定処理手段として、前記注湯路を通して浴槽に注湯するための注湯運転中に、前記給湯温度センサにより検出された温度と、前記ふろ経路温度センサにより検出された温度の差の絶対値が所定の第１判定温度値以上になり、かつ、前記高温差し湯路を通して浴槽に差し湯するための差し湯運転中に、前記缶体温度センサにより検出された温度と、前記ふろ経路温度センサにより検出された温度の差が所定の第２判定温度値以上になることを条件にして、前記ふろ経路温度センサが異常であると判定する構成とする（請求項１）。 In order to achieve the above object, according to the first aspect of the present invention, a hot water supply passage for pouring hot water into a bathtub and hot water supply to a hot water tap on the hot water outlet side of the can body for receiving and heating water supplied from the water supply passage. A general hot water supply path is branched, and the downstream end of the bypass path branched from the water supply path joins the general hot water supply path at a position downstream of the branch position with the high temperature hot water supply path. The upstream end of the pouring passage for pouring and filling the bathtub is poured from a position downstream of the pouring position, and the downstream side of the hot water pouring passage joins with the downstream side of the pouring passage. The following specific items are to be provided for the hot water supply system. That is, the temperature of hot water poured through the pouring passage is detected at a position downstream of the joining position between the can body temperature sensor for detecting the temperature of hot water discharged from the can body and the bypass passage. A hot water supply temperature sensor for detecting the temperature of hot water passing through a position downstream of the joining position of the high temperature hot water supply channel and the pouring channel, and a temperature sensor related to the hot water for the bathtub Temperature sensor abnormality determination processing means for determining the abnormality. Then, as the sensor abnormality determination processing means, the temperature detected by the hot water supply temperature sensor during the pouring operation for pouring into the bathtub through the pouring channel and the temperature detected by the bath path temperature sensor The absolute value of the difference is equal to or higher than a predetermined first determination temperature value, and the temperature detected by the can body temperature sensor during hot water operation for hot water pouring into the bathtub through the high temperature hot water channel, and A configuration is adopted in which it is determined that the bath path temperature sensor is abnormal on the condition that the difference in temperature detected by the bath path temperature sensor is equal to or greater than a predetermined second determination temperature value.

本発明の場合、注湯運転中に、給湯温度センサにより検出された温度と、ふろ経路温度センサにより検出された温度の差の絶対値が所定の第１判定温度値以上になるという判定条件が成立すれば、本来は同じ注湯の温度を検出するものであるため、給湯温度センサか、ふろ経路温度センサかのいずれかに異常が発生しているものと判定することができる。一方、差し湯運転中に、缶体温度センサにより検出された温度と、前記ふろ経路温度センサにより検出された温度の差が所定の第２判定温度値以上になるという判定条件が成立すれば、本来は同じ差し湯の温度を検出するものであるため、缶体温度センサか、ふろ経路温度センサかのいずれかに異常が発生しているものと判定することができる。そして、これら注湯運転中の判定条件と、差し湯運転中の判定条件とのいずれもが成立することを確認することで、それら共通するふろ経路温度センサにシフト故障の異常が生じているものと確実に判定し得ることになる。 In the case of the present invention, during the pouring operation, there is a determination condition that the absolute value of the difference between the temperature detected by the hot water supply temperature sensor and the temperature detected by the bath path temperature sensor is equal to or greater than a predetermined first determination temperature value. If established, the temperature of the same pouring is originally detected, so that it can be determined that an abnormality has occurred in either the hot water supply temperature sensor or the bath path temperature sensor. On the other hand, if the determination condition that the difference between the temperature detected by the can body temperature sensor and the temperature detected by the bath path temperature sensor is equal to or greater than a predetermined second determination temperature value during the hot water operation, Originally, the temperature of the same hot water is detected, so that it can be determined that an abnormality has occurred in either the can body temperature sensor or the full path temperature sensor. Then, by confirming that both the determination conditions during the pouring operation and the determination conditions during the hot water operation are satisfied, an abnormality of shift failure has occurred in these common path temperature sensors. It can be determined with certainty.

又、第２の発明では、給水路からの給水を受けて加熱するための缶体の出湯側において、浴槽に対し設定差し湯温度の湯を差し湯するための高温差し湯路と、給湯栓に給湯するための一般給湯路とが分岐され、前記一般給湯路は、前記高温差し湯路との分岐位置よりも下流側位置において前記給水路から分岐したバイパス路の下流端が合流し、さらにこの合流位置よりも下流側位置から、浴槽に対し注湯して湯張りするための注湯路の上流端が分岐され、この注湯路の下流側において前記高温差し湯路の下流側とが互いに合流されている給湯装置を対象に、次の特定事項を備えることとした。すなわち、前記バイパス路との合流位置よりも下流側位置において前記注湯路を通して注湯される湯の温度を検出するための給湯温度センサと、前記高温差し湯路と前記注湯路との合流位置よりも下流側位置を通る湯の温度を検出するふろ経路温度センサと、前記浴槽に対する差し湯に係る温度センサの異常を判定するための温度センサ異常判定処理手段とを備えることとする。そして、前記センサ異常判定処理手段として、前記注湯路を通して浴槽に注湯するための注湯運転中に、前記給湯温度センサにより検出された温度と、前記ふろ経路温度センサにより検出された温度の差の絶対値が所定の第１判定温度値以上になり、かつ、前記高温差し湯路を通して浴槽に差し湯するための差し湯運転中に、前記高温差し湯路を通して差し湯を行う差し湯運転のために前記缶体での加熱制御により缶体から出湯されることになる湯の温度として設定される設定差し湯温度と、前記ふろ経路温度センサにより検出された温度の差が所定の第２判定温度値以上になることを条件にして、前記ふろ経路温度センサが異常であると判定する構成とする（請求項２）。 In the second aspect of the invention, a hot water supply passage for pouring hot water of a set hot water temperature into the bathtub and a hot water tap on the outlet side of the can body for receiving and heating the water supplied from the water supply passage A general hot water supply passage for supplying hot water to the hot water supply branch, and the general hot water supply passage joins the downstream end of the bypass passage branched from the water supply passage at a position downstream of the branch position with the high temperature hot water supply passage, An upstream end of a pouring passage for pouring and filling the bathtub is poured from a position downstream of the merging position, and a downstream side of the high-temperature hot water feeding passage is downstream of the pouring passage. The following specific items were provided for hot water supply devices joined together. That is, a hot water supply temperature sensor for detecting the temperature of hot water poured through the pouring channel at a position downstream of the merging position with the bypass channel, and the merging of the high temperature hot water channel and the pouring channel A bath path temperature sensor that detects the temperature of hot water passing through a position downstream of the position, and a temperature sensor abnormality determination processing means for determining abnormality of the temperature sensor related to the hot water with respect to the bathtub. Then, as the sensor abnormality determination processing means, the temperature detected by the hot water supply temperature sensor during the pouring operation for pouring into the bathtub through the pouring channel and the temperature detected by the bath path temperature sensor Hot water supply operation in which the absolute value of the difference is equal to or higher than a predetermined first determination temperature value and hot water is supplied through the high temperature hot water supply channel during the hot water supply operation for hot water supply to the bathtub through the high temperature hot water supply channel. Therefore, a difference between a set hot water temperature set as a temperature of hot water to be discharged from the can body by heating control in the can body and a temperature detected by the bath path temperature sensor is a predetermined second. On the condition that the temperature becomes equal to or higher than the determination temperature value, the bath path temperature sensor is determined to be abnormal (claim 2).

本発明の場合も、第１の発明と同様の作用が得られる。この第２の発明は、差し湯運転中の判定条件において、第１の発明における缶体温度センサにより検出される温度に代えて、設定差し湯温度を用いている点で、第１の発明と異なる。設定差し湯温度は、この設定差し湯温度に基づいて缶体での加熱制御が実行され、それにより缶体から出湯されることになる湯の温度として設定されるものであり、缶体温度センサにより検出される温度と同視することが可能である。このため、設定差し湯温度を用いた対比によっても、第１の発明と同様の作用が得られることになる。 In the case of the present invention as well, the same action as in the first invention can be obtained. This second invention is different from the first invention in that the set hot water temperature is used in place of the temperature detected by the can temperature sensor in the first invention in the judgment conditions during the hot water operation. Different. The set hot water temperature is set as the temperature of the hot water that is heated in the can body based on the set hot water temperature, and is thereby discharged from the can body. It is possible to equate with the temperature detected by. For this reason, the same operation as that of the first invention can be obtained by comparison using the set hot water temperature.

第１又は第２の発明の給湯装置におけるセンサ異常判定処理手段として、ふろ経路温度センサが異常であると判定するための注湯運転中の条件として、給湯温度センサにより検出された温度と、ふろ経路温度センサにより検出された温度の差の絶対値が所定の第１判定温度値以上になることに加えて、給湯温度センサにより検出された温度と、注湯運転のために缶体での加熱制御又はこれに加えて前記バイパス路からの水との混水制御を経て前記注湯路を通して注湯されることになる湯の温度として設定される設定注湯温度との差の絶対値が所定の注湯判定値以下になることを追加することができる（請求項３）。このようにすることにより、設定注湯温度は、例えば、この設定注湯温度に基づいて缶体での加熱制御が実行され、それにより缶体から出湯されることになる湯に対し、バイパス路からの水との混水制御が実行されて温調された上で注湯されることになる湯の温度として設定されるものであり、本来は給湯温度センサにより検出される温度と同等である筈であるため、注湯判定値以下で同等と見なせるか、あるいは、注湯判定値よりも大きくて同等とは見なせない、つまり給湯温度センサに異常が発生しているかもしれないと推測される状況にあるか、の見極めが可能となる。この見極めに基づき注湯運転中の給湯温度センサとふろ経路温度センサとについて所定の検出温度対比を行えば、異常が発生しているとすると、異常が発生しているのはいずれの温度センサである蓋然性が高いのかという判定がより容易かつ確実に行い得ることになる。 As a sensor abnormality determination processing means in the hot water supply apparatus of the first or second invention, as a condition during the pouring operation for determining that the bath path temperature sensor is abnormal, the temperature detected by the hot water temperature sensor, the bath In addition to the absolute value of the temperature difference detected by the path temperature sensor being equal to or greater than the predetermined first determination temperature value, the temperature detected by the hot water supply temperature sensor and the heating in the can for the pouring operation The absolute value of the difference from the set pouring temperature set as the temperature of hot water to be poured through the pouring channel through control or mixed water control with the water from the bypass channel in addition to the control is predetermined. It is possible to add that it is equal to or less than the pouring judgment value of (No. 3). By doing in this way, the set pouring temperature is, for example, a bypass path for the hot water to be discharged from the can body by performing heating control in the can body based on the set pouring temperature. It is set as the temperature of the hot water to be poured after the mixed water control with the water from the water is executed and the temperature is adjusted, and is originally equivalent to the temperature detected by the hot water temperature sensor Therefore, it is estimated that it may be considered to be equal or less than the pouring judgment value, or not to be regarded as equivalent because it is greater than the pouring judgment value, that is, an abnormality may have occurred in the hot water temperature sensor. It is possible to determine whether there is a situation. Based on this determination, if a predetermined detection temperature comparison is performed for the hot water supply temperature sensor and the bath path temperature sensor during the pouring operation, if an abnormality has occurred, any temperature sensor has an abnormality. It can be determined easily and reliably whether a certain probability is high.

第１又は第２の発明の給湯装置におけるセンサ異常判定処理手段として、ふろ経路温度センサが異常であると判定されれば、差し湯運転を強制的に終了させる処理を実行する構成とすることができる（請求項４）。このようにすることにより、より安全性が高く、より使い勝手のよい給湯装置を実現し得ることになる。 The sensor abnormality determination processing means in the hot water supply apparatus of the first or second invention may be configured to execute a process for forcibly terminating the hot water operation if the bath path temperature sensor is determined to be abnormal. (Claim 4). By doing so, it is possible to realize a hot water supply device that is safer and more user-friendly.

以上、説明したように、請求項１〜請求項４のいずれかの本発明の給湯装置によれば、注湯運転中に、給湯温度センサにより検出された温度と、ふろ経路温度センサにより検出された温度の差の絶対値が所定の第１判定温度値以上になるという判定条件と、差し湯運転中に、缶体温度センサにより検出された温度と、前記ふろ経路温度センサにより検出された温度の差が所定の第２判定温度値以上になるという判定条件との双方が成立することにより、ふろ経路温度センサにシフト故障の異常が発生しているものと確実に判定することができるようになる。 As described above, according to the hot water supply device of any one of the first to fourth aspects of the present invention, the temperature detected by the hot water supply temperature sensor and the bath path temperature sensor are detected during the pouring operation. A determination condition that the absolute value of the difference between the detected temperatures is equal to or greater than a predetermined first determination temperature value, a temperature detected by the can body temperature sensor during the hot water supply operation, and a temperature detected by the bath path temperature sensor By satisfying both of the determination conditions that the difference between the two is equal to or greater than a predetermined second determination temperature value, it is possible to reliably determine that the shift path temperature sensor has a shift fault abnormality. Become.

特に、請求項３の給湯装置によれば、センサ異常判定処理手段として、ふろ経路温度センサが異常であると判定するための注湯運転中の条件として、さらに、給湯温度センサにより検出された温度と、注湯運転のために缶体での加熱制御又はこれに加えて前記バイパス路からの水との混水制御により前記注湯路を通して注湯されることになる湯の温度として設定される設定注湯温度との差の絶対値が所定の注湯判定値以下になることを追加することにより、注湯判定値以下であれば、設定注湯温度と、給湯温度センサにより検出される温度とを同等と見なすことができる一方、注湯判定値よりも大きければ給湯温度センサに異常が発生しているかもしれないと推測することができる、というように見極めが可能となる。そして、この見極めに基づき注湯運転中の給湯温度センサとふろ経路温度センサとについて所定の検出温度対比を行えば、異常が発生しているとすると、異常が発生しているのはいずれの温度センサである蓋然性が高いのかという判定をより容易かつ確実に行うことができるようになる。これにより、差し湯運転中の第２判定温度値を用いた条件が成立するか否かの判定と相俟って最終の異常判定をより的確に行うことができるようになる。 In particular, according to the hot water supply apparatus of claim 3, as the sensor abnormality determination processing means, the temperature detected by the hot water supply temperature sensor as a condition during the pouring operation for determining that the bath path temperature sensor is abnormal is further provided. And the temperature of the hot water to be poured through the pouring channel by the heating control in the can for the pouring operation or the mixed water control with the water from the bypass channel in addition to this. By adding that the absolute value of the difference from the set pouring temperature is less than or equal to the predetermined pouring judgment value, if the pouring judgment value is less than or equal to the preset pouring temperature, the set pouring temperature and the temperature detected by the hot water temperature sensor Can be regarded as being equivalent, and if it is larger than the pouring determination value, it can be estimated that an abnormality may have occurred in the hot water supply temperature sensor. Then, based on this determination, if a predetermined detection temperature comparison is performed for the hot water supply temperature sensor and the bath path temperature sensor during the pouring operation, if an abnormality has occurred, the temperature at which the abnormality has occurred It is possible to more easily and reliably determine whether the probability of being a sensor is high. Thereby, it becomes possible to perform the final abnormality determination more accurately in combination with the determination whether or not the condition using the second determination temperature value during the hot water operation is satisfied.

又、請求項４の給湯装置によれば、センサ異常判定処理手段として、ふろ経路温度センサが異常であると判定されれば、差し湯運転を強制的に終了させる処理を実行する構成とすることにより、より安全性が高く、より使い勝手のよい給湯装置を実現することができるようになる。 According to the hot water supply apparatus of claim 4, the sensor abnormality determination processing means is configured to execute a process of forcibly terminating the hot water supply operation when it is determined that the bath path temperature sensor is abnormal. Thus, it is possible to realize a hot water supply device that is safer and more convenient to use.

本発明の実施形態に係る給湯装置の模式図である。It is a schematic diagram of the hot water supply apparatus which concerns on embodiment of this invention. 図１の給湯装置の作動制御を行うコントローラのブロック構成図である。It is a block block diagram of the controller which performs the operation control of the hot water supply apparatus of FIG. 図２の温度センサ異常判定処理部による異常判定処理の内、第１判定処理を示すフローチャートである。It is a flowchart which shows a 1st determination process among the abnormality determination processes by the temperature sensor abnormality determination process part of FIG. 図２の温度センサ異常判定処理部による異常判定処理の内、第２判定処理を示すフローチャートである。It is a flowchart which shows a 2nd determination process among the abnormality determination processes by the temperature sensor abnormality determination process part of FIG. 図２の温度センサ異常判定処理部による異常判定処理の内、第３判定処理を示すフローチャートである。It is a flowchart which shows a 3rd determination process among the abnormality determination processes by the temperature sensor abnormality determination process part of FIG.

以下、本発明の実施形態を図面に基づいて説明する。
図１は、本発明の給湯装置１を示したものである。この給湯装置１は、高温差し湯機能付きに構成されており、缶体２において給水路３からの水を所定の高温（高温差し湯の場合には例えば最高８０℃、給湯の場合には例えば最高７５℃）まで熱交換加熱した後に出湯路４に出湯された湯を、分岐点４０において、給湯栓５１等に至る一般給湯路５と、浴槽６に至る高温差し湯路７とに分岐させて供給可能となっている。一般給湯路５には、その途中の混合部８０位置にバイパス路８の下流端が合流するように接続されており、このバイパス路８を通して、バイパス流量調整弁８１により給水路３から分流させた所定流量の水が導入可能となっている。このバイパス流量調整弁８１の開度制御に基づく混合比制御により一般給湯路５の高温の湯に対し所定量混水し、給湯栓５１への給湯温度を所定の設定給湯温度（例えば４０℃）に温調し得るようにされている。又、このバイパス路８の合流位置より下流側の分岐位置５０の一般給湯路５から注湯路９の上流端が分岐され、この注湯路９の下流端は浴槽６に対し連通接続されており、設定注湯温度に温調された湯を浴槽６に注湯して湯張りし得るようになっている。前記の高温差し湯路７の下流端は後述の注湯電磁弁９１の下流側の合流点９０で注湯路９に連通接続され、これにより、高温差し湯路７に流入した高温差し湯が合流点９０から注湯路９を通して浴槽６まで供給されるようになっている。高温差し湯は、湯張り後の浴槽６内の湯水を昇温させて追い焚きと同等の役割を果たすようになっている。この以下、各構成要素について、詳細に説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a hot water supply apparatus 1 of the present invention. The hot water supply device 1 is configured with a high-temperature hot water hot water function, and in the can 2, water from the water supply passage 3 is supplied to a predetermined high temperature (for example, a maximum of 80 ° C. for hot water hot water, The hot water discharged to the hot water outlet 4 after heat exchange heating to a maximum of 75 ° C. is branched at a branch point 40 into a general hot water supply path 5 leading to the hot water tap 51 and the like, and a high temperature hot water supply path 7 leading to the bathtub 6. Can be supplied. The general hot water supply path 5 is connected so that the downstream end of the bypass path 8 joins at the position of the mixing section 80 in the middle of the general hot water path 5, and is branched from the water supply path 3 by the bypass flow rate adjustment valve 81 through the bypass path 8. A predetermined flow rate of water can be introduced. A predetermined amount of hot water in the general hot water supply passage 5 is mixed by the mixing ratio control based on the opening degree control of the bypass flow rate adjusting valve 81, and the hot water supply temperature to the hot water tap 51 is set to a predetermined set hot water temperature (for example, 40 ° C.). The temperature can be adjusted. Further, the upstream end of the pouring passage 9 is branched from the general hot water supply passage 5 at the branch position 50 downstream from the joining position of the bypass passage 8, and the downstream end of the pouring passage 9 is connected to the bathtub 6 in communication. The hot water adjusted to the set pouring temperature is poured into the bathtub 6 and can be refilled. The downstream end of the high temperature hot water supply passage 7 is connected to the pouring passage 9 at a junction 90 downstream of the hot water solenoid valve 91 to be described later. It is supplied from the junction 90 to the bathtub 6 through the pouring channel 9. The hot hot water plays a role equivalent to reheating by raising the temperature of hot water in the bathtub 6 after filling. Hereinafter, each component will be described in detail.

前記缶体２は、送風ファン２１からの燃焼用空気及び燃料供給系２２からの燃料ガスの供給を受けて燃焼する燃焼バーナ２３と、この燃焼バーナ２３の燃焼熱により熱交換加熱される熱交換器２４，２５とが内蔵されている。燃焼バーナ２３は、例えば３つの領域が互いに独立にあるいは任意に組み合わせて燃焼可能に構成され、又、熱交換器としては、燃焼ガスの顕熱により熱交換加熱するための主熱交換器２４と、主熱交換器２４通過後の燃焼排ガスの潜熱回収により予熱するための副熱交換器２５とで構成されている。そして、前記副熱交換器２５の入口には、水道管又は水道タンクに接続されて上水を給水する給水路３の下流端が接続され、副熱交換器を通過した後に主熱交換器２４を通過する間に熱交換加熱された湯が、主熱交換器２４の出口に接続された出湯路４の上流端に出湯されるようになっている。なお、熱交換器として２種類のもの２４，２５を備えている点や、燃焼バーナ２３が独立燃焼可能な３つの領域を備えている点などは、本発明において必須のものではなく、缶体としては給水を受けて加熱し得るものであれば本発明を適用することができる。 The can body 2 receives combustion air supplied from the blower fan 21 and fuel gas supplied from the fuel supply system 22 and burns, and heat exchange heat-heated by the combustion heat of the combustion burner 23. The devices 24 and 25 are built in. The combustion burner 23 is configured such that, for example, three regions can be burned independently or in any combination, and as a heat exchanger, a main heat exchanger 24 for heat exchange heating by sensible heat of combustion gas and The auxiliary heat exchanger 25 for preheating by recovering the latent heat of the combustion exhaust gas after passing through the main heat exchanger 24. The inlet of the auxiliary heat exchanger 25 is connected to the downstream end of the water supply channel 3 that is connected to a water pipe or a water tank and supplies clean water. After passing through the auxiliary heat exchanger, the main heat exchanger 24 is connected. The hot water heated and exchanged while passing through the hot water is discharged to the upstream end of the hot water outlet 4 connected to the outlet of the main heat exchanger 24. In addition, the point provided with two types of thing 24 and 25 as a heat exchanger, the point provided with three area | regions in which the combustion burner 23 can be independently burned, etc. are not essential in this invention. The present invention can be applied as long as it can be heated by receiving water.

前記給水路３には、バイパス路８の分岐位置よりも下流側（缶体２側）において缶体２に給水される水の給水流量を検出する缶体流量センサ３１と、その給水温度を検出する給水温度センサ３２とがそれぞれ介装されている。そして、缶体２で熱交換加熱されて昇温した高温湯の出湯温度を検出するための缶体温度センサ４１が出湯路４に介装されている。 In the water supply path 3, a can body flow rate sensor 31 for detecting a water supply flow rate of water supplied to the can body 2 on the downstream side (can body 2 side) from the branch position of the bypass path 8 and a water supply temperature thereof are detected. The feed water temperature sensor 32 is interposed. And the can body temperature sensor 41 for detecting the tapping temperature of the hot water heated by the heat exchange heat in the can body 2 is interposed in the tapping channel 4.

前記一般給湯路５には、バイパス路８が合流する混合部８０の上流側位置に逆止弁５２が介装される一方、混合部８０の下流側であって前記注湯路９の分岐位置５０よりも上流側に、過流出防止弁とも呼ばれる給湯流量調整弁５３と、給湯栓５１又は注湯路９に供給される給湯温度又は注湯温度を検出する給湯温度センサ５４と、給湯流量を検出する給湯流量センサ５５とがそれぞれ介装されている。 The general hot water supply path 5 is provided with a check valve 52 at an upstream position of the mixing section 80 where the bypass path 8 joins, while the branch position of the pouring path 9 is downstream of the mixing section 80. On the upstream side of 50, a hot water supply flow rate adjustment valve 53, which is also called an overflow prevention valve, a hot water supply temperature sensor 54 for detecting a hot water supply temperature or a hot water supply temperature supplied to the hot water tap 51 or the hot water supply passage 9, A hot water supply flow sensor 55 to be detected is interposed.

前記高温差し湯路７には、非通電状態で閉状態を維持し通電すると開切換する電磁開閉弁により構成され浴槽６に対し高温差し湯をするか停止するかの開閉切換可能な差し湯電磁弁７１と、開度調整による差し湯流量を変更調整可能な差し湯流量調整弁７２とがそれぞれ介装されている。このような差し湯電磁弁７１と、差し湯流量調整弁７２とを互いに独立して設置していることにより、例えば停電が発生したとしても、高温差し湯路７を確実に遮断して浴槽６側に高温湯が流れてしまうことを阻止することができる。すなわち、例えば閉止機能付きの流量調整弁を用いて、高温差し湯路７の開閉機能と流量調整機能との双方を１つの機器で実現させた場合、差し湯運転中に停電が万一発生すると、その開いた状態のままとなってしまうという不都合が考えられる。これに対し、前記の如く差し湯電磁弁７１と、差し湯流量調整弁７２とを互いに独立して設置することで、差し湯電磁弁７１がたとえ開状態に制御されて差し湯運転中であったとしても、停電が発生すれば、差し湯電磁弁７１を自動的に閉状態に戻すことができ、高温差し湯路７を確実に遮断状態に切換ることができるようになる。 The hot water supply passage 7 is constituted by an electromagnetic on-off valve that is kept in a closed state in a non-energized state and is switched to open when energized. A valve 71 and a hot water flow rate adjusting valve 72 capable of changing and adjusting the hot water flow rate by adjusting the opening degree are respectively provided. Since the hot water solenoid valve 71 and the hot water flow rate adjustment valve 72 are installed independently of each other, for example, even if a power failure occurs, the hot water hot water passage 7 is reliably blocked and the bathtub 6 It is possible to prevent the hot water from flowing to the side. That is, for example, when both the opening / closing function of the hot water supply passage 7 and the flow adjustment function are realized by one device using a flow rate adjusting valve with a closing function, a power failure should occur during the hot water operation. The inconvenience of being left open can be considered. On the other hand, the hot water solenoid valve 71 and the hot water flow rate adjustment valve 72 are installed independently of each other as described above, so that the hot water solenoid valve 71 is controlled to be in the open state and the hot water operation is in progress. Even if a power failure occurs, the hot water solenoid valve 71 can be automatically returned to the closed state, and the high temperature hot water channel 7 can be reliably switched to the shut-off state.

さらに、前記注湯路９には、その開閉により注湯して湯張りを行うか否かに切換える電磁開閉弁により構成された注湯電磁弁９１と、注湯流量を検出するための注湯流量センサ９２とが介装されている。さらに、前記注湯路９には、前記高温差し湯路７が合流する合流点９０よりも下流側に、負圧を破壊して逆流防止するためのバキュームブレーカ９３と、高温差し湯７又は注湯路９を通して浴槽６側に流れる経路内の湯の温度（ふろ経路温度）を検出するためのふろ経路温度センサ９４とが介装されている。 Further, the pouring passage 9 has a pouring electromagnetic valve 91 constituted by an electromagnetic on-off valve for switching whether or not the pouring is performed by pouring by opening and closing, and pouring for detecting the pouring flow rate. A flow sensor 92 is interposed. Further, the pouring channel 9 has a vacuum breaker 93 for destroying the negative pressure and preventing backflow downstream from the junction 90 where the high temperature pouring channel 7 joins, and the hot pouring bath 7 or pouring water. A bath path temperature sensor 94 for detecting the temperature of the hot water in the path flowing toward the bathtub 6 through the bath path 9 (the bath path temperature) is interposed.

なお、浴槽６には、撹拌のためのアダプタ６１が設置されており前記注湯路９の下流端が前記アダプタ６１に連通接続されている。このアダプタ６１は、形状記憶合金を用いて所定の上限設定高温（例えば８０℃）の湯と接触することで自動閉止する自動閉止機構６２を備えており、浴槽６が空の状態で高温差し湯路７側から８０℃以上の高温差し湯が供給されてくると、弁が自動閉止して流通を遮断するようになっている。つまり、８０℃の高温差し湯と接触することで、開状態の弁が閉止状態に変形するように予め形状記憶されたものである。なお、浴槽６に浴湯が存在する場合には、高温差し湯が供給されてきても、その高温差し湯は浴湯と撹拌混合されるため、アダプタ６１は開状態に維持されることになる。 In addition, the adapter 61 for stirring is installed in the bathtub 6, and the downstream end of the said pouring channel 9 is connected to the said adapter 61 in communication. This adapter 61 is provided with an automatic closing mechanism 62 that automatically closes by contact with hot water of a predetermined upper limit setting high temperature (for example, 80 ° C.) using a shape memory alloy, and the hot water supply hot water in a state where the bathtub 6 is empty. When hot hot water of 80 ° C. or higher is supplied from the path 7 side, the valve is automatically closed to block the flow. That is, the shape is preliminarily stored so that the valve in the open state is deformed to the closed state by contact with the hot hot water of 80 ° C. In the case where bath water is present in the bathtub 6, even if the hot water is supplied, the hot water is stirred and mixed with the bath water, so that the adapter 61 is kept open. .

以上の給湯装置において、給湯栓５１へ所定の設定給湯温度で給湯を実行する給湯運転制御と、浴槽６に対し湯張りのために注湯する注湯運転制御と、湯張り後の浴槽６内の湯水に対し高温湯を差し湯して追い焚きと同等機能を果たさせる差し湯運転制御とを含む種々の作動制御や、差し湯運転制御に係る種々の温度センサについての温度センサ異常判定処理が、例えば台所リモコン１０１や浴室リモコン１０２等の各種リモコンからの入力設定信号や操作信号の出力や、種々の温度センサ等からの検出信号の出力を受けて、コントローラ（制御手段）１０により実行されるようになっている。このために、コントローラ１０は、給湯運転制御を行う給湯制御部１０３（図２参照）、注湯運転制御を行う注湯制御部１０４、差し湯運転制御を行う差し湯制御部１０５や、温度センサ異常判定処理を行う温度センサ異常判定処理部１０６等を備えている。コントローラ１０は、ＣＰＵや書き換え可能メモリを備えるマイコンによって主構成されており、メモリに記憶されたプログラム及び各種データに基づいて前記の給湯制御や差し湯制御などを行うようになっている。 In the above hot water supply apparatus, hot water supply operation control for executing hot water supply to the hot water tap 51 at a predetermined set hot water supply temperature, pouring operation control for pouring the hot water into the bathtub 6 for hot water filling, and the inside of the bathtub 6 after hot water filling. Hot water hot water hot water hot water hot water hot water operation control, including hot water operation control that performs the equivalent function, and temperature sensor abnormality determination processing for various temperature sensors related to hot water operation control Are executed by the controller (control means) 10 in response to the output of input setting signals and operation signals from various remote controllers such as the kitchen remote controller 101 and the bathroom remote controller 102, and the output of detection signals from various temperature sensors. It has become so. For this purpose, the controller 10 includes a hot water supply control unit 103 (see FIG. 2) that performs hot water supply operation control, a pouring control unit 104 that performs hot water operation control, a hot water control unit 105 that performs hot water operation control, and a temperature sensor. A temperature sensor abnormality determination processing unit 106 that performs abnormality determination processing is provided. The controller 10 is mainly configured by a microcomputer including a CPU and a rewritable memory, and performs the hot water supply control and hot water control based on programs and various data stored in the memory.

前記給湯制御部１０３は、例えば差し湯制御が行われていない状態で給湯栓５１がユーザーにより開かれて給湯流量センサ５５が所定の最低作動流量を検出すると、燃焼バーナ２３及び燃料供給系２２からなる燃焼系を燃焼作動させて給湯用の所定の高温（例えば６０〜７５℃）の湯を出湯路４及び一般給湯路５に出湯させる一方、給水温度センサ３２による検出給水温度、缶体温度センサ４１による検出出湯温度、給湯温度センサ５４による検出給湯温度やリモコン１０１，１０２に入力設定された設定給湯温度に基づいてバイパス流量調整弁８１による混合比制御や、給湯流量調整弁５３の開度制御が行われる。この結果、給湯栓５１に対し所定の設定給湯温度（例えば４０℃）に温調された湯が給湯されることになる。 For example, when the hot-water tap 51 is opened by the user and the hot-water supply flow sensor 55 detects a predetermined minimum operating flow rate when the hot-water supply control is not performed, the hot-water supply control unit 103 detects from the combustion burner 23 and the fuel supply system 22. The combustion system is burned to discharge hot water at a predetermined high temperature (for example, 60 to 75 ° C.) for hot water supply to the hot water supply passage 4 and the general hot water supply passage 5, while the detected water supply temperature and can temperature sensor are detected by the water supply temperature sensor 32. 41, the mixing ratio control by the bypass flow rate adjustment valve 81, and the opening degree control of the hot water flow rate adjustment valve 53 based on the detected hot water temperature by the hot water supply temperature sensor 41, the hot water temperature detected by the hot water temperature sensor 54, and the set hot water temperature input to the remote controllers 101 and 102. Is done. As a result, hot water whose temperature is adjusted to a predetermined set hot water supply temperature (for example, 40 ° C.) is supplied to the hot-water tap 51.

前記注湯制御部１０４は、例えば浴室リモコン１０２の湯張りスイッチがユーザーによりＯＮ操作されると、注湯電磁弁９１を開き、前記給湯制御部１０３の給湯制御と同様に、燃焼系２２，２３の燃焼作動と、バイパス流量調整弁８１及び給湯流量調整弁５３の開度制御とを行い、前記浴室リモコン１０２に設定入力された設定注湯温度に温調された湯を浴槽６に対し注湯するようになっている。 When the hot water filling switch of the bathroom remote control 102 is turned ON by the user, for example, the hot water pouring control unit 104 opens the pouring electromagnetic valve 91, and the combustion systems 22, 23 are similar to the hot water supply control of the hot water supply control unit 103. And the opening control of the bypass flow rate adjustment valve 81 and the hot water supply flow rate adjustment valve 53, and hot water adjusted to the set pouring temperature set and input to the bathroom remote control 102 is poured into the bathtub 6. It is supposed to be.

前記差し湯制御部１０５は、湯張り後に例えば浴室リモコン１０２の差し湯スイッチ（熱くするためのスイッチ）がユーザーによりＯＮ操作されると、差し湯制御を開始することになる。すなわち、差し湯電磁弁７１を開き、給水温度センサ３２による検出給水温度と缶体温度センサ４１による検出出湯温度とに基づいて所定の設定差し湯温度になるように燃焼系２２，２３を作動させ、缶体２から出湯した高温湯を高温差し湯７及び合流点９０以降の注湯路９を通して浴槽に差し湯する。この際、差し湯流量調整弁７２が所定開度に調整されて、所定の差し湯流量の一定流量で差し湯されるように制御される。所定の差し湯流量とは、浴槽６内にチョロチョロと流入する程度の流量（例えば４Ｌ／ｍｉｎ）であり、このため、差し湯流量調整弁７２の開度をかなり絞り側に調整・設定する。前記の設定差し湯温度としては、例えば、差し湯運転開始初期の期間（例えば６０ｓｅｃ）は６０℃とし、その後、定常状態となれば８０℃とすることができる。そして、前記の差し湯スイッチがＯＦＦにされるか、缶体流量センサ３１による流量積算処理に基づき高温差し湯量が所定湯量（例えばユーザーがリモコン１０２に入力設定した湯量）に到達すれば、燃焼系２２，２３の燃焼作動を停止し差し湯電磁弁７１を閉切換して差し湯運転を終了させる。 The hot water control unit 105 starts hot water control when, for example, a hot water switch (a switch for heating) of the bathroom remote control 102 is turned on by the user after hot water filling. That is, the hot water solenoid valve 71 is opened, and the combustion systems 22 and 23 are operated so as to reach a predetermined hot water temperature based on the detected water temperature detected by the water temperature sensor 32 and the hot water temperature detected by the can body temperature sensor 41. The hot water discharged from the can body 2 is poured into the bathtub through the high-temperature hot water 7 and the pouring channel 9 after the junction 90. At this time, the hot water flow rate adjustment valve 72 is adjusted to a predetermined opening degree and controlled so as to be poured at a constant flow rate of a predetermined hot water flow rate. The predetermined hot water flow rate is a flow rate (for example, 4 L / min) at which the hot water flows into the bathtub 6, and therefore, the opening degree of the hot water flow rate adjustment valve 72 is adjusted and set to the throttle side considerably. The set hot water temperature can be set to 60 ° C. during the initial period (for example, 60 sec) of the hot water operation, and can be set to 80 ° C. after a steady state. If the hot water switch is turned off or the hot hot water amount reaches a predetermined hot water amount (for example, the amount of hot water input by the user set in the remote controller 102) based on the flow rate integration process by the can body flow sensor 31, the combustion system The combustion operation of 22 and 23 is stopped, and the hot water solenoid valve 71 is closed and closed to end the hot water operation.

前記温度センサ異常判定処理部１０６は、前記の注湯運転制御や差し湯運転制御等とは別に、それらと並行処理により処理が実行されるようになっている。つまり、注湯運転中や差し湯運転中において、注湯運転制御や差し湯運転制御等とは別の制御処理により併せて実行されるようになっている。温度センサ異常判定処理は、以下の第１〜第３判定処理を実行するようになっており、これらについて図３，図４，図５のフローチャートを参照しつつ、詳細に説明する。 The temperature sensor abnormality determination processing unit 106 is configured to perform processing by parallel processing with the pouring operation control, the hot water operation control, and the like. In other words, during the pouring operation or the hot water operation, it is executed together with a control process different from the pouring operation control or the hot water operation control. The temperature sensor abnormality determination process is configured to execute the following first to third determination processes, which will be described in detail with reference to the flowcharts of FIGS.

第１判定処理（図３参照）として，注湯運転中における判定処理を行う。まず、注湯運転中であることを、例えば注湯制御部１０４からの情報の出力を受けて確認した上で（ステップＳ１１でＹＥＳ）、注湯経路に関係する温度センサ５４，９４の検出温度等に基づく対比判定を行う（ステップＳ１２）。すなわち、給湯温度センサ５４による検出注湯温度Ｔｈと、設定注湯温度Ｓｈと、ふろ経路温度センサ９４による検出ふろ経路温度Ｔｂとに基づいて、次の３つの条件が成立するか否かを判定する。
（１）．検出注湯温度Ｔｈと設定注湯温度Ｓｈとの差の絶対値（｜Ｔｈ−Ｓｈ｜）が注湯判定値Ｊｓ（例えば３℃）以下であること。
（２）．検出ふろ経路温度Ｔｂと検出注湯温度Ｔｈとの差の絶対値（｜Ｔｂ−Ｔｈ｜）が第１判定値Ｊ１（例えば１０℃）以上であること。
（３）．（１）及び（２）の双方の条件の成立が所定の設定時間ｔ１だけ継続して発生すること。 As the first determination process (see FIG. 3), the determination process during the pouring operation is performed. First, for example, after receiving information output from the pouring control unit 104 and confirming that the pouring operation is in progress (YES in step S11), the detected temperatures of the temperature sensors 54 and 94 related to the pouring route are as follows. A comparison determination based on the above is performed (step S12). That is, it is determined whether or not the following three conditions are satisfied based on the detected pouring temperature Th by the hot water supply temperature sensor 54, the set pouring temperature Sh, and the detected bath path temperature Tb by the bath path temperature sensor 94. To do.
(1). The absolute value (| Th−Sh |) of the difference between the detected pouring temperature Th and the set pouring temperature Sh is equal to or less than the pouring determination value Js (for example, 3 ° C.).
(2). The absolute value (| Tb−Th |) of the difference between the detection bath path temperature Tb and the detection pouring temperature Th is equal to or higher than the first determination value J1 (for example, 10 ° C.).
(3). Satisfaction of both conditions (1) and (2) must occur continuously for a predetermined set time t1.

（１）の条件は、本来であれば、設定注湯温度に基づいて燃焼系２２，２３による燃焼作動制御やバイパス路８による混水制御が行われて、給湯温度センサ５４位置には設定注湯温度の湯が供給され、それを給湯温度センサ５４が検出するため、その検出給湯温度は設定注湯温度とほぼ同等になる筈であり、このことより、給湯温度センサ５４がシフト故障を生じていないことの信頼性を確認するためのものである。（２）の条件は、（１）の条件成立を前提としてふろ経路温度センサ９４についての信頼性を確認するためのものであり、例えば１０℃のシフト故障が生じていると、浴槽６のアダプタ６１の自動閉止機能が作動しないため発生する不都合の観点から判定値Ｊ１の値が設定されている。（３）の条件は、瞬時データに基づく瞬間的な条件成立を排除して（２）の条件が真に成立するといえる程度に確定的な条件成立を判定・確認するためのものである。より安定的な条件成立の判定・確認を図るために、設定時間ｔ１として例えば２５ｓｅｃ程度を設定することができる。 If the condition of (1) is originally, the combustion operation control by the combustion systems 22 and 23 and the mixed water control by the bypass 8 are performed based on the set pouring temperature, and the set pouring temperature is set at the hot water temperature sensor 54 position. Since hot water at a hot water temperature is supplied and detected by the hot water supply temperature sensor 54, the detected hot water supply temperature should be almost equal to the set hot water temperature, and this causes the hot water supply temperature sensor 54 to cause a shift failure. It is for confirming the reliability of not. The condition (2) is for confirming the reliability of the bath path temperature sensor 94 on the assumption that the condition (1) is satisfied. For example, when a shift failure of 10 ° C. occurs, the adapter of the bathtub 6 The judgment value J1 is set from the viewpoint of inconvenience that occurs because the automatic closing function 61 does not operate. The condition (3) is for determining and confirming that the deterministic condition is established to the extent that it can be said that the condition (2) is truly established, excluding the instantaneous condition establishment based on the instantaneous data. In order to determine and confirm the establishment of a more stable condition, for example, about 25 seconds can be set as the set time t1.

もしも、ステップＳ１２での３条件が全て成立すれば（ステップＳ１２でＹＥＳ）、ＮＧカウンターに「１」を加算し（ステップＳ１３）、このＮＧカウンターがα回（例えば５回）積算されたか否かを確認する処理を注湯運転が継続されている間繰り返す（ステップＳ１４でＮＯ，Ｓ１１〜Ｓ１４）。この判定でＮＧカウンターがα回に到達すれば（ステップＳ１４でＹＥＳ）、異常判定フラグＦ１を立て、これを記憶する（ステップＳ１５）。なお、前記の繰り返し過程において、注湯運転が終了すれば、図示を省略しているが、判定処理を停止する。なお、ＮＧカウンターが所定回数に達することを、異常判定フラグＦ１を立てる条件としたのは、判定についてより一層の確実を期すためであり、このＮＧカウンターが所定回数に達することの条件は外すこともできる。後述のステップＳ２３，Ｓ２４におけるＮＧカウンターについても、同様である。 If all three conditions in step S12 are satisfied (YES in step S12), “1” is added to the NG counter (step S13), and whether or not this NG counter is accumulated α times (for example, 5 times). Is repeated while the pouring operation is continued (NO in step S14, S11 to S14). If the NG counter reaches α times in this determination (YES in step S14), the abnormality determination flag F1 is set and stored (step S15). In addition, in the above repeating process, if the pouring operation is completed, the determination process is stopped although illustration is omitted. The reason that the NG counter reaches the predetermined number of times is set as a condition for setting the abnormality determination flag F1 to make the determination more reliable, and the condition that the NG counter reaches the predetermined number of times is removed. You can also. The same applies to NG counters in steps S23 and S24 described later.

次に、第２判定処理（図４参照）として，差し湯運転中における判定処理を行う。まず、差し湯運転中であることを、例えば差し湯制御部１０５からの情報の出力を受けて確認した上で（ステップＳ２１でＹＥＳ）、高温差し湯が通過する経路に関係する温度センサ４１，９４の検出温度等に基づく対比判定を行う（ステップＳ２２）。すなわち、缶体温度センサ４１による検出出湯温度Ｔｃと、ふろ経路温度センサ９４による検出ふろ経路温度Ｔｂとに基づいて、次の２つの条件が成立するか否かを判定する。
（４）．検出ふろ経路温度Ｔｂと検出出湯温度Ｔｃとの差の絶対値（｜Ｔｂ−Ｔｃ｜）が第２判定値Ｊ２（例えば１０℃）以上であること。
（５）．（４）の条件成立が所定の設定時間ｔ１だけ継続して発生すること。 Next, as a second determination process (see FIG. 4), a determination process during the hot water operation is performed. First, for example, after receiving information output from the hot water control unit 105 and confirming that the hot water operation is in progress (YES in step S21), the temperature sensors 41 related to the path through which the hot water hot water passes, A comparison determination based on the detected temperature 94 is performed (step S22). That is, based on the detected hot water temperature Tc detected by the can body temperature sensor 41 and the detected bath path temperature Tb detected by the bath path temperature sensor 94, it is determined whether or not the following two conditions are satisfied.
(4). The absolute value (| Tb−Tc |) of the difference between the detected bath path temperature Tb and the detected tapping temperature Tc is equal to or higher than the second determination value J2 (for example, 10 ° C.).
(5). Satisfaction of the condition (4) occurs for a predetermined set time t1.

（４）の条件は、本来であれば、缶体２から出湯された高温湯の温度である検出出湯温度Ｔｃと、その高温湯が高温差し湯路７を流れてふろ経路温度センサ９４位置で検出される検出ふろ経路温度Ｔｂとは、経路での放熱を考慮してもほぼ同等になる筈であり、このことより、缶体温度センサ４１とふろ経路温度センサ９４のいずれかにシフト故障が生じている可能性を判定するためのものである。（５）の条件は、前述した（３）の条件について説明したものと同じ性質のものである。 The condition (4) is originally the detected hot water temperature Tc, which is the temperature of the hot water discharged from the can 2, and the hot water flows through the hot water supply passage 7 at the position of the bath temperature sensor 94. The detected bath path temperature Tb to be detected should be substantially the same even when heat dissipation in the path is taken into account. Therefore, a shift failure occurs in either the can body temperature sensor 41 or the bath path temperature sensor 94. This is to determine the possibility of occurrence. The condition (5) has the same properties as those described for the condition (3) described above.

もしも、ステップＳ２２での２条件がいずれも成立すれば（ステップＳ２２でＹＥＳ）、ＮＧカウンターに「１」を加算し（ステップＳ２３）、このＮＧカウンターがα回（例えば５回）積算されたか否かを確認する処理を差し湯運転が継続されている間繰り返す（ステップＳ２４でＮＯ，Ｓ２１〜Ｓ２４）。この判定でＮＧカウンターがα回に到達すれば（ステップＳ２４でＹＥＳ）、異常判定フラグＦ２を立て、これを記憶する（ステップＳ２５）。なお、前記の繰り返し過程において、差し湯運転が終了すれば、図示を省略しているが、判定処理を停止する。 If the two conditions in step S22 are both satisfied (YES in step S22), “1” is added to the NG counter (step S23), and whether or not this NG counter is accumulated α times (for example, 5 times). This process is repeated while the hot water supply operation is continued (NO in step S24, S21 to S24). If the NG counter reaches α times in this determination (YES in step S24), the abnormality determination flag F2 is set and stored (step S25). In addition, in the above repeating process, if the hot water supply operation is completed, the determination process is stopped although illustration is omitted.

そして、第３判定処理（図５参照）として，記憶されている異常判定フラグの内容を確認する（ステップＳ３１）。異常判定フラグとして、Ｆ１＋Ｆ２の双方が既に立てられていれば、ふろ経路温度センサ９４がシフト故障に陥っていると判定し（ステップＳ３２）、ふろ経路温度センサ９４がシフト故障時の処理を行う（ステップＳ３３）。異常判定フラグＦ２だけでは、異常発生は有るものの、その異常発生が缶体温度センサ４１か、ふろ経路温度センサ９４かの区別が判然としないが、異常判定フラグＦ１が併せて成立していれば、その異常発生がふろ経路温度センサ９４であると判定することができるようになる。ステップＳ３３の処理としては、現在の差し湯運転を強制的に停止し、以後の差し湯運転の実行を禁止したり、例えばリモコン１０１，１０２に対し、ふろ経路温度センサ９４がシフト故障に陥っている旨を表示処理したりすることができる。なお、メンテナンス時にその旨の情報が読み出せるように情報の記憶設定処理を行うことができる。ステップＳ３１の確認において、異常判定フラグとして、Ｆ２のみ立てられていれば、缶体温度センサ４１がシフト故障に陥っていると判定し（ステップＳ３４）、缶体温度センサ４１がシフト故障時の処理を行う（ステップＳ３５）。この場合、異常判定フラグＦ２により、缶体温度センサ４１及びふろ経路温度センサ９４のいずれかに異常発生していると判定され、異常判定フラグＦ１が非成立であるため、ふろ経路温度センサ９４は正常であり、缶体温度センサ４１に異常発生していると判定することができる。ステップＳ３５の処理としては、例えばリモコン１０１，１０２に対し、缶体温度センサ４１がシフト故障に陥っている旨を表示処理したり、メンテナンス時にその旨の情報が読み出せるように情報の記憶設定処理をしたりすることができる。以上により、差し湯運転に係る温度センサ９４，４１のシフト故障の発生を確実に検知することができるようになる。 Then, as the third determination process (see FIG. 5), the contents of the stored abnormality determination flag are confirmed (step S31). If both F1 + F2 are already set as the abnormality determination flags, it is determined that the bath path temperature sensor 94 has suffered a shift failure (step S32), and the bath path temperature sensor 94 performs a process at the time of the shift fault ( Step S33). Although there is an abnormality only with the abnormality determination flag F2, it is not clear whether the abnormality is the can body temperature sensor 41 or the bottom path temperature sensor 94, but if the abnormality determination flag F1 is also established. Thus, it can be determined that the occurrence of the abnormality is the full path temperature sensor 94. As the processing in step S33, the current hot water supply operation is forcibly stopped, and the subsequent hot water supply operation is prohibited, or the remote path temperature sensor 94 falls into a shift failure with respect to the remote controllers 101 and 102, for example. Display processing can be performed. Information storage setting processing can be performed so that information to that effect can be read during maintenance. In the confirmation of step S31, if only F2 is set as the abnormality determination flag, it is determined that the can body temperature sensor 41 has fallen into a shift failure (step S34), and the can body temperature sensor 41 is processed at the time of the shift failure. Is performed (step S35). In this case, it is determined by the abnormality determination flag F2 that an abnormality has occurred in either the can body temperature sensor 41 or the bathroom path temperature sensor 94, and the abnormality determination flag F1 is not established. It can be determined that the can body temperature sensor 41 is normal and abnormal. As processing of step S35, for example, display processing that the can body temperature sensor 41 has a shift failure is displayed on the remote controllers 101 and 102, and information storage setting processing so that information can be read during maintenance. You can do it. As described above, the occurrence of the shift failure of the temperature sensors 94 and 41 related to the hot water operation can be reliably detected.

＜他の実施形態＞
なお、本発明は前記実施形態に限定されるものではなく、その他種々の実施形態を包含するものである。すなわち、第２判定処理（図４）において、缶体温度センサ４１の検出出湯温度Ｔｃに代えて設定差し湯温度Ｓｂを用いるようにすることができる。設定差し湯温度Ｓｂに基づいて燃焼系２２，２３が燃焼作動されて、設定差し湯温度Ｓｂの高温湯が缶体２から出湯されて、その高温湯が缶体温度センサ４１により検出される筈であり、設定差し湯温度Ｓｂを検出出湯温度Ｔｃと同視することができるからである。この場合には、条件（４）′として、検出ふろ経路温度Ｔｂと設定差し湯温度Ｓｂとの差の絶対値（｜Ｔｂ−Ｓｂ｜）が判定値Ｊ２（例えば１０℃）以上であること、が成立するか否かを判定することになる（図４のステップＳ２２）。又、この条件（４）′や前記実施形態の条件（４）を用いた第２判定処理のみで、現在の差し湯運転を強制的に停止し、以後の差し湯運転の実行を禁止するという安全処理を実行することができる。このようにすることにより、より安全側の制御の実現が図られることになる。 <Other embodiments>
In addition, this invention is not limited to the said embodiment, Other various embodiment is included. That is, in the second determination process (FIG. 4), the set hot water temperature Sb can be used instead of the detected hot water temperature Tc of the can body temperature sensor 41. The combustion systems 22 and 23 are combusted based on the set hot water temperature Sb, hot water having the set hot water temperature Sb is discharged from the can body 2, and the hot water is detected by the can body temperature sensor 41. This is because the set hot water temperature Sb can be equated with the detected hot water temperature Tc. In this case, as the condition (4) ′, the absolute value (| Tb−Sb |) of the difference between the detected bath path temperature Tb and the set hot water temperature Sb is not less than a determination value J2 (for example, 10 ° C.). Is determined (step S22 in FIG. 4). In addition, only the second determination process using the condition (4) ′ and the condition (4) of the above embodiment, the current hot water supply operation is forcibly stopped, and the subsequent hot water supply operation is prohibited. Safety processing can be performed. By doing so, more safe control can be realized.

又、図３の第１判定処理のステップＳ１２において、（１）．検出注湯温度Ｔｈと設定注湯温度Ｓｈとの差の絶対値（｜Ｔｈ−Ｓｈ｜）が判定値Ｊｓ（例えば３℃）以下であること、の条件が成立するか否かの判定を省略することができる。かかる（１）の条件成立を省略して（２）の条件成立に基づいて異常判定フラグＦ１を立てると、異常判定フラグＦ１が設定されたとき、給湯温度センサ５４あるいはふろ経路温度センサ９４のいずれかに異常が発生しているものの、いずれに異常が発生しているかの特定は不明になる。しかし、図５の第３判定処理において、異常判定フラグＦ１＋Ｆ２の双方が設定されていれば（ステップＳ３１，Ｓ３２）、シフト故障異常が発生しているのはふろ経路温度センサ９４であると推認することができる。すなわち、異常判定フラグＦ２が単独設定されたとき、缶体温度センサ４１あるいはふろ経路温度センサ９４のいずれかに異常が発生しているが、いずれに異常が発生しているかの特定は不明になるものの、異常判定フラグＦ１及びＦ２が共に設定されたということは、双方に共通しているふろ経路温度センサ９４に異常が発生しているためであると判定することが合理的な推認の結論とすることができる。一方、異常判定フラグＦ２だけが設定されているときには（ステップＳ３１，Ｓ３４）、給湯温度センサ５４とふろ経路温度センサ９４とについての所定の条件は非成立であり（異常判定フラグＦ１は非設定）、いずれも異常は発生していないということであり、異常判定フラグＦ２において残る缶体温度センサ４１に異常が発生していると判定することができる。 In step S12 of the first determination process of FIG. Determination of whether or not the condition that the absolute value (| Th−Sh |) of the difference between the detected pouring temperature Th and the set pouring temperature Sh is equal to or less than a determination value Js (for example, 3 ° C.) is omitted. can do. When the condition determination of (1) is omitted and the abnormality determination flag F1 is set based on the satisfaction of the condition (2), when the abnormality determination flag F1 is set, either the hot water supply temperature sensor 54 or the bath path temperature sensor 94 is set. Although an abnormality has occurred, it is unclear how the abnormality has occurred. However, if both of the abnormality determination flags F1 + F2 are set in the third determination process of FIG. 5 (steps S31 and S32), it is inferred that the shift fault abnormality has occurred in the bottom path temperature sensor 94. be able to. That is, when the abnormality determination flag F2 is set singly, an abnormality has occurred in either the can body temperature sensor 41 or the bottom path temperature sensor 94, but it is not clear which is abnormal. However, the fact that both of the abnormality determination flags F1 and F2 are set is a conclusion of rational reasoning to determine that an abnormality has occurred in the bath path temperature sensor 94 common to both. can do. On the other hand, when only the abnormality determination flag F2 is set (steps S31 and S34), the predetermined condition for the hot water supply temperature sensor 54 and the bath path temperature sensor 94 is not satisfied (the abnormality determination flag F1 is not set). In any case, no abnormality has occurred, and it can be determined that an abnormality has occurred in the can temperature sensor 41 remaining in the abnormality determination flag F2.

１給湯装置
２缶体
３給水路
４出湯路（缶体の出湯側）
５一般給湯路
６浴槽
７高温差し湯路
８バイパス路
４０高温差し湯路との分岐位置
４１缶体温度センサ
５１給湯栓
５４給湯温度センサ
８０混合部（バイパス路との合流位置）
９０高温差し湯路と注湯路との合流位置
９４ふろ経路温度センサ（温度センサ）
１０コントローラ（温度センサ異常判定処理手段）
１０６温度センサ異常判定処理部（温度センサ異常判定処理手段）
Ｊ１第１判定温度値
Ｊ２第２判定温度値
Ｊｓ注湯判定値 DESCRIPTION OF SYMBOLS 1 Hot-water supply apparatus 2 Can body 3 Water supply path 4 Hot-water supply path (The hot-water side of a can body)
5 General hot water supply path 6 Bathtub 7 High temperature hot water supply path 8 Bypass path 40 Branching position with high temperature hot water supply path 41 Can body temperature sensor 51 Hot water tap 54 Hot water supply temperature sensor 80 Mixing part (joining position with bypass path)
90 Junction position 94 between the hot water supply channel and the pouring channel 94 bath temperature sensor (temperature sensor)
10 Controller (Temperature sensor abnormality determination processing means)
106 Temperature sensor abnormality determination processing unit (temperature sensor abnormality determination processing means)
J1 first judgment temperature value J2 second judgment temperature value Js pouring judgment value

Claims

A hot water supply passage for pouring hot water into the bathtub and a general hot water supply passage for supplying hot water to the hot water tap are branched at the hot water outlet side of the can body for receiving and heating water from the water supply passage, The passage joins the downstream end of the bypass passage branched from the water supply passage at a position downstream of the branch position with the high-temperature hot water supply passage, and further pours hot water into the bathtub from a position downstream of the joining position. In the hot water supply apparatus in which the upstream end of the pouring channel for hot water filling is branched and the downstream side of the high temperature hot water feeding channel is joined to the downstream side of the pouring channel,
In order to detect the temperature of hot water poured through the pouring passage at a position downstream of the joining position between the can body temperature sensor and the bypass passage for detecting the temperature of hot water discharged from the can body Hot water supply temperature sensor, bathway temperature sensor for detecting the temperature of hot water passing through a position downstream of the joining position of the high temperature hot water supply channel and the pouring channel, and temperature sensor abnormality relating to the hot water for the bathtub Temperature sensor abnormality determination processing means for determining
The sensor abnormality determination processing means calculates a difference between a temperature detected by the hot water supply temperature sensor and a temperature detected by the bath path temperature sensor during a pouring operation for pouring into the bathtub through the pouring channel. The absolute value is equal to or higher than a predetermined first determination temperature value, and the temperature detected by the can body temperature sensor during the hot water operation for pouring into the bathtub through the high temperature hot water path, and the bath path It is configured to determine that the furrow path temperature sensor is abnormal on the condition that the difference in temperature detected by the temperature sensor is equal to or greater than a predetermined second determination temperature value.
A water heater characterized by that.

A hot water supply passage for supplying hot water at a set hot water temperature to the bathtub and a general hot water supply passage for supplying hot water to the hot water tap on the side of the hot water outlet of the can body for receiving and heating water supplied from the water supply passage The downstream end of the bypass passage branched from the water supply passage is joined at a position downstream of the branch position with the high-temperature hot water supply passage, and further downstream of the general hot water supply passage. From the hot water supply apparatus in which the upstream end of the pouring channel for pouring and filling the bathtub is branched, and the downstream side of the hot water pouring channel is joined to the downstream side of the pouring channel ,
From a hot water supply temperature sensor for detecting the temperature of hot water poured through the pouring channel at a position downstream from the merging position with the bypass channel, and from a merging position of the high temperature hot water channel and the pouring channel A bath path temperature sensor for detecting the temperature of hot water passing through the downstream position, and a temperature sensor abnormality determination processing means for determining abnormality of the temperature sensor related to the hot water with respect to the bathtub,
The sensor abnormality determination processing means calculates a difference between a temperature detected by the hot water supply temperature sensor and a temperature detected by the bath path temperature sensor during a pouring operation for pouring into the bathtub through the pouring channel. For a hot water operation in which the absolute value is equal to or higher than a predetermined first judgment temperature value and hot water is poured through the high temperature hot water channel during the hot water operation for pouring into the bathtub through the high temperature hot water channel. The difference between the set hot water temperature set as the temperature of hot water to be discharged from the can body by the heating control in the can body and the temperature detected by the bath path temperature sensor is a predetermined second determination temperature. It is configured to determine that the bathway temperature sensor is abnormal on condition that the value is equal to or greater than a value.
A water heater characterized by that.

The hot water supply device according to claim 1 or 2,
The sensor abnormality determination processing means detects the temperature detected by the hot water supply temperature sensor and the temperature detected by the bath path temperature sensor as conditions during the pouring operation for determining that the bath path temperature sensor is abnormal. In addition to the absolute value of the difference between the detected temperatures being equal to or higher than a predetermined first determination temperature value, the temperature detected by the hot water supply temperature sensor and the heating control in the can for the pouring operation Alternatively, the absolute value of the difference from the set pouring temperature set as the temperature of hot water to be poured through the pouring channel by the mixed water control with the water from the bypass channel is a predetermined pouring. A hot water supply device that has been added to be below the hot water determination value.

The hot water supply device according to any one of claims 1 to 3,
The hot water supply apparatus, wherein the sensor abnormality determination processing means is configured to execute a process of forcibly terminating the hot water supply operation when it is determined that the bathway temperature sensor is abnormal.