JP2003161520A - Abnormality diagnostic method of bath return temperature sensor - Google Patents
Abnormality diagnostic method of bath return temperature sensorInfo
- Publication number
- JP2003161520A JP2003161520A JP2001357376A JP2001357376A JP2003161520A JP 2003161520 A JP2003161520 A JP 2003161520A JP 2001357376 A JP2001357376 A JP 2001357376A JP 2001357376 A JP2001357376 A JP 2001357376A JP 2003161520 A JP2003161520 A JP 2003161520A
- Authority
- JP
- Japan
- Prior art keywords
- bath
- temperature
- temperature sensor
- return
- bath return
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
Landscapes
- Control For Baths (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、強制循環式風呂釜
装置の運転中に実施する風呂戻り温度センサの異常診断
方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for diagnosing an abnormality in a bath return temperature sensor, which is carried out during operation of a forced circulation type bath hook device.
【０００２】[0002]
【従来の技術】循環ポンプで吸い込んだ浴槽内の浴水を
風呂戻り経路を介して加熱手段に到達させて加熱し、加
熱した浴水を風呂往き経路を介して浴槽に吐き出すこと
が繰り返されて浴槽中の浴水を所定の温度まで加熱する
強制循環式風呂釜装置では、風呂戻り経路に風呂戻り温
度センサが、風呂往き経路に風呂往き温度センサがそれ
ぞれ設けられている。各温度センサからの出力信号は、
加熱手段の運転を制御する制御手段の温度制御部に入力
されており、各温度センサが、例えば、断線して出力信
号が温度制御部に入力されない状態になった場合は、温
度制御部は温度センサを異常と判断して強制循環式風呂
釜装置の運転操作盤に温度センサ異常を表示していた。2. Description of the Related Art It is repeated that bath water sucked by a circulation pump reaches a heating means through a bath return path to heat the bath water and the heated bath water is discharged into a bath through a bath outgoing path. In the forced circulation type bath hook device that heats the bath water in the bathtub to a predetermined temperature, a bath return temperature sensor is provided in the bath return path, and a bath leaving temperature sensor is provided in the bath going path. The output signal from each temperature sensor is
The temperature control unit is input to the temperature control unit of the control unit that controls the operation of the heating unit.For example, when each temperature sensor is disconnected and the output signal is not input to the temperature control unit, the temperature control unit controls the temperature. It was judged that the sensor was abnormal, and the temperature sensor abnormality was displayed on the operation panel of the forced circulation bath device.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、温度セ
ンサが劣化したり、ショートしたり、誤配線されたりし
た場合では、温度センサからは信号が出力されて温度制
御部に入力されるため、温度制御部では温度センサの異
常を検知できないことになる。特に風呂戻り温度センサ
の出力値が、浴水を加熱する際に設定される沸き上げ温
度以下で固定もしくはほとんど変化しない状態になった
場合、温度制御部では正確な浴水の温度の検出ができな
い状態となる。この場合、強制循環式風呂釜装置に設け
られた安全手段が作動して加熱手段の運転を停止させる
が、安全手段が作動するまで加熱手段による加熱が継続
されて浴水の温度は高温になってしまう。本発明はかか
る事情に鑑みてなされたもので、風呂戻り温度センサの
異常を浴水加熱中に検知して浴水が高温に加熱されるこ
とを防止できる風呂戻り温度センサの異常診断方法を提
供することを目的とする。However, when the temperature sensor is deteriorated, short-circuited, or is mis-wired, a signal is output from the temperature sensor and input to the temperature control unit. This means that the temperature sensor cannot detect any abnormality in the temperature sensor. Especially when the output value of the bath return temperature sensor is fixed or hardly changes below the boiling temperature set when heating the bath water, the temperature control unit cannot accurately detect the temperature of the bath water. It becomes a state. In this case, the safety means provided in the forced circulation bath cooker device operates to stop the operation of the heating means, but heating by the heating means is continued until the safety means operates and the temperature of the bath water becomes high. Will end up. The present invention has been made in view of such circumstances, and provides a method for diagnosing an abnormality in a bath return temperature sensor that can detect an abnormality in the bath return temperature sensor during heating of the bath water and prevent the bath water from being heated to a high temperature. The purpose is to do.
【０００４】[0004]
【課題を解決するための手段】前記目的に沿う第１の発
明に係る風呂戻り温度センサの異常診断方法は、循環ポ
ンプで浴槽の浴水を風呂戻り経路で加熱手段に輸送し、
加熱した前記浴水を風呂往き経路で前記浴槽に輸送する
強制循環式風呂釜装置の前記風呂戻り経路に設けられた
風呂戻り温度センサの異常診断方法において、前記強制
循環式風呂釜装置の運転中、予め設定した判定時間後に
前記風呂戻り温度センサで測定した前記浴水の温度の上
昇が所定温度未満である場合には前記加熱手段及び前記
循環ポンプの運転を中断し、予め設定した待ち時間経過
後に、前記風呂往き経路に設けられた風呂往き温度セン
サで測定した前記浴水の温度と前記風呂戻り温度センサ
で測定した前記浴水の温度との温度差を求めて、前記温
度差が予め設定した基準温度差を超えた場合は前記風呂
戻り温度センサを異常と診断して前記強制循環式風呂釜
装置の運転を終了させ、前記温度差が前記基準温度差以
下の場合は前記風呂戻り温度センサを正常と判断して前
記加熱手段及び前記循環ポンプの運転を再開する。According to a first aspect of the present invention, there is provided a bath return temperature sensor abnormality diagnosing method, wherein a circulating pump transports bath water from a bath to a heating means through a bath return route.
In a method for diagnosing an abnormality of a bath return temperature sensor provided in the bath return path of a forced circulation type bath kettle device that transports the heated bath water to the bathtub through a bath outward route, during the operation of the forced circulation type bath kettle device. If the temperature rise of the bath water measured by the bath return temperature sensor is below a predetermined temperature after a preset judgment time, the operation of the heating means and the circulation pump is interrupted, and a preset waiting time elapses. After that, the temperature difference is set in advance by obtaining the temperature difference between the temperature of the bath water measured by the bath-going temperature sensor provided in the bath-going path and the temperature of the bath water measured by the bath-return temperature sensor. If the temperature difference exceeds the reference temperature difference, the bath return temperature sensor is diagnosed as abnormal and the operation of the forced circulation type bath device is terminated, and if the temperature difference is less than the reference temperature difference, the wind Returning to determine the temperature sensor to be normal resume operation of the heating means and the circulation pump.
【０００５】強制循環式風呂釜装置の運転中は、循環ポ
ンプで吸い込まれた浴槽の浴水が風呂戻り経路を通って
加熱手段に到達して加熱され、高温になった（例えば、
浴槽から吸い込まれた際の浴水温度に対して２０〜３０
℃温度上昇した）浴水が風呂往き経路を通って浴槽に吐
き出されることが繰り返されて、浴槽中の浴水の平均温
度が上昇していく。このため、風呂戻り経路に設けられ
た風呂戻り温度センサにより測定される浴水の温度は、
強制循環式風呂釜装置の運転時間の経過と共に上昇して
いく。このときの単位時間当たりの温度上昇は、加熱手
段において単位時間に供給される発熱量、循環ポンプに
より循環させる単位時間当たりの浴水量、加熱手段に流
入する浴水温度、加熱手段における熱伝達率等から推定
することができるため、所定の時間経過後の浴水温度を
予測することができる。従って、浴水温度の上昇を確認
するために判定時間を設定して、この判定時間経過後に
風呂戻り温度センサで測定した浴水の温度と、予測した
判定時間経過後の浴水温度を比較することで、加熱手段
による加熱が正常に行われているかの判定を行うことが
できる。During operation of the forced circulation bath device, the bath water in the bathtub sucked by the circulation pump reaches the heating means through the bath return path and is heated to a high temperature (for example,
20 to 30 against the bath water temperature when sucked from the bathtub
Bath water having a temperature rise of ℃) is repeatedly discharged into the bathtub through the bathing path, and the average temperature of the bathwater in the bathtub rises. Therefore, the temperature of the bath water measured by the bath return temperature sensor provided in the bath return path is
It rises with the lapse of the operating time of the forced circulation bath device. The temperature rise per unit time at this time is the amount of heat generated by the heating means per unit time, the amount of bath water circulated by the circulation pump per unit time, the temperature of the bath water flowing into the heating means, and the heat transfer coefficient in the heating means. Since it can be estimated from the above, the bath water temperature after a predetermined time has elapsed can be predicted. Therefore, a judgment time is set in order to confirm the rise in the bath water temperature, and the temperature of the bath water measured by the bath return temperature sensor after the judgment time has passed is compared with the bath water temperature after the predicted judgment time has passed. Therefore, it is possible to determine whether the heating by the heating unit is normally performed.
【０００６】ここで、加熱手段において単位時間に供給
される発熱量、循環ポンプにより循環させる単位時間当
たりの浴水量の制御が正常に行われているとき、判定時
間後に風呂戻り温度センサで測定される浴水の温度が予
測温度よりも低い場合、すなわち、判定時間経過後の風
呂戻り温度センサで測定される浴水の温度の上昇が所定
温度（判定時間経過後の浴水の予測温度と判定時間の起
点となった時点での浴水の温度との差）未満であれば、
風呂戻り温度センサが異常である可能性が高いと判断で
きる。ここで、判定時間としては３分以上とすることが
でき、この判定時間に対応する所定温度としては０．６
〜１．４℃となる。判定時間を３分以上としたのは、３
分未満では浴水の温度上昇が小さく、判定時間経過後の
浴水の予測温度と判定時間の起点となった時点での浴水
の温度との間に常に明瞭な差が生じないためである。な
お、具体的な判定時間は、加熱手段の発熱量、浴槽の容
量により変わるので、個々に決定する必要がある。Here, when the amount of heat generated per unit time in the heating means and the amount of bath water per unit time circulated by the circulation pump are normally controlled, the temperature is measured by the bath return temperature sensor after the determination time. If the temperature of the bath water is lower than the predicted temperature, that is, the temperature of the bath water measured by the bath return temperature sensor after the elapse of the determination time has reached the predetermined temperature (determined as the predicted temperature of the bath water after the elapse of the determination time If it is less than the difference from the temperature of the bath water at the time of the starting point),
It can be determined that the bath return temperature sensor is highly likely to be abnormal. Here, the determination time can be 3 minutes or more, and the predetermined temperature corresponding to the determination time is 0.6.
It becomes ~ 1.4 ° C. The judgment time is 3 minutes or more is 3
This is because if the time is less than a minute, the temperature rise of the bath water is small, and there is not always a clear difference between the predicted temperature of the bath water after the judgment time has passed and the temperature of the bath water at the time when the judgment time has started. . The specific determination time depends on the amount of heat generated by the heating means and the capacity of the bath, so it must be individually determined.
【０００７】風呂戻り温度センサが異常である可能性が
高いと判断した場合、加熱手段及び循環ポンプの運転を
中断する。加熱手段及び循環ポンプが停止しても、加熱
手段の残熱で停止直後は浴水の加熱が生じるが、時間の
経過と共に加熱も少なくなる。そして、浴水は自然対流
で浴槽と加熱手段の間を循環するので、風呂往き経路に
設けられた風呂往き温度センサで測定された浴水の温度
と風呂戻り経路に設けられた風呂戻り温度センサで測定
された浴水の温度は徐々に接近してくる。そして、風呂
戻り経路、風呂往き経路、加熱手段の構造から、自然対
流の効果で風呂往き温度センサで測定された浴水の温度
と、風呂戻り温度センサで測定された浴水の温度がそれ
ぞれどのくらいの変化速度で変化するのかを推定するこ
とができる。従って、予め設定された待ち時間経過後、
風呂往き温度センサで測定された浴水の温度と、風呂戻
り温度センサで測定された浴水の温度がそれぞれ何度に
なるかの上限及び下限を予測できる。When it is determined that the bath return temperature sensor is likely to be abnormal, the operation of the heating means and the circulation pump is interrupted. Even if the heating means and the circulation pump are stopped, the heating of the bath water occurs immediately after the stop due to the residual heat of the heating means, but the heating also decreases with the passage of time. And since the bath water circulates between the bath and the heating means by natural convection, the temperature of the bath water measured by the bath-going temperature sensor provided in the bath-going route and the bath-return temperature sensor provided in the bath-going route. The temperature of the bath water measured in step 1 gradually approaches. And from the structure of the bath return path, the bath return path, and the heating means, how much the temperature of the bath water measured by the bath-going temperature sensor and the temperature of the bath water measured by the bath-return temperature sensor are measured by the effect of natural convection. It is possible to estimate whether it changes at the changing speed of. Therefore, after the preset waiting time,
It is possible to predict the upper limit and the lower limit of how many times the bath water temperature measured by the bath-going temperature sensor and the bath water temperature measured by the bath-return temperature sensor become, respectively.
【０００８】このため、待ち時間経過後における風呂往
き温度センサで測定された浴水の温度と風呂戻り温度セ
ンサで測定された浴水の温度との間の温度差は、各温度
の上限と下限から決まる温度差以下になる。ここで、各
温度の上限と下限から決まる最大の温度差を基準温度差
とすると、自然対流が正常に発生している場合では、実
際に得られる温度差は基準温度差以下となる。従って、
待ち時間経過後の風呂往き温度センサで測定された浴水
の温度と風呂戻り温度センサで測定された浴水の温度と
の間の温度差が基準温度差以下であれば、浴水の温度は
正常に測定されていると考えられ、風呂戻り温度センサ
は正常であると診断できる。このときは、加熱手段及び
循環ポンプの運転を再開する。一方、待ち時間経過後の
風呂往き温度センサで測定された浴水の温度と風呂戻り
温度センサで測定された浴水の温度との間の温度差が待
ち時間経過後に予測することができる基準温度差を超え
ていれば、浴水の温度は正常に測定されていないと考え
られ、風呂戻り温度センサは異常であると診断できる。
このときは、加熱手段で制御された加熱ができないた
め、強制循環式風呂釜装置の運転を終了させる。ここ
で、待ち時間は、例えば２０〜３０分とすることがで
き、２０〜３０分間の待ち時間に対応する基準温度差と
しては７〜３℃となる。待ち時間を２０分以上としたの
は、２０分未満では自然対流で加熱手段の残熱による影
響を除去することができないためである。また、待ち時
間を３０分以下としたのは、３０分を超えて待ち時間を
設けても風呂往き温度センサの温度と風呂戻り温度セン
サの温度の変化はいずれも小さくなって、温度差として
の変化に大きく影響しなくなるためである。Therefore, the temperature difference between the temperature of the bath water measured by the bath-outgoing temperature sensor and the temperature of the bath water measured by the bath-return temperature sensor after the waiting time elapses is the upper and lower limits of each temperature. It will be less than the temperature difference determined by. Here, assuming that the maximum temperature difference determined from the upper limit and the lower limit of each temperature is the reference temperature difference, when natural convection normally occurs, the actually obtained temperature difference is less than or equal to the reference temperature difference. Therefore,
If the temperature difference between the bath water temperature measured by the bath-going temperature sensor and the bath water temperature measured by the bath-return temperature sensor after the waiting time is less than the reference temperature difference, the bath water temperature will be The bath return temperature sensor can be diagnosed to be normal, as it is considered to be measured normally. At this time, the heating means and the circulation pump are restarted. On the other hand, the reference temperature that can be predicted after the waiting time is the temperature difference between the temperature of the bath water measured by the bath outgoing temperature sensor after the waiting time and the temperature of the bath water measured by the bath returning temperature sensor. If the difference is exceeded, it is considered that the temperature of the bath water is not normally measured, and the bath return temperature sensor can be diagnosed as abnormal.
At this time, since the controlled heating cannot be performed by the heating means, the operation of the forced circulation bath device is terminated. Here, the waiting time may be, for example, 20 to 30 minutes, and the reference temperature difference corresponding to the waiting time of 20 to 30 minutes is 7 to 3 ° C. The waiting time is set to 20 minutes or more because the effect of the residual heat of the heating means cannot be removed by the natural convection in less than 20 minutes. In addition, the reason why the waiting time is 30 minutes or less is that even if the waiting time is set to exceed 30 minutes, the change in the temperature of the bath-going temperature sensor and the temperature of the bath-returning temperature sensor are both small, and there is a difference in temperature. This is because it will not significantly affect the changes.
【０００９】前記目的に沿う第２の発明に係る風呂戻り
温度センサの異常診断方法は、循環ポンプで浴槽の浴水
を風呂戻り経路で加熱手段に輸送し、加熱した前記浴水
を風呂往き経路で前記浴槽に輸送する強制循環式風呂釜
装置の前記風呂戻り経路に設けられた風呂戻り温度セン
サの異常診断方法において、前記強制循環式風呂釜装置
の運転中、予め設定した判定時間後に前記風呂戻り温度
センサで測定した前記浴水の温度の上昇が所定温度未満
である場合には前記加熱手段の運転を中断し、前記循環
ポンプを予め設定したポンプ駆動時間運転しながら予め
設定した待ち時間経過後に、前記風呂往き経路に設けら
れた風呂往き温度センサで測定した前記浴水の温度と前
記風呂戻り温度センサで測定した前記浴水の温度との温
度差を求めて、前記温度差が予め設定した基準温度差を
超えた場合は前記風呂戻り温度センサを異常と診断して
前記強制循環式風呂釜装置の運転を終了させ、前記温度
差が前記基準温度差以下の場合は前記風呂戻り温度セン
サを正常と判断して前記加熱手段及び前記循環ポンプの
運転を再開する。A method for diagnosing a bath return temperature sensor according to a second aspect of the present invention, which is in accordance with the above object, transports bath water in a bathtub to a heating means through a bath return route by means of a circulation pump, and heats the bath water to leave the bath route. In the method for diagnosing an abnormality in the bath return temperature sensor provided in the bath return path of the forced circulation type bath kettle device that is transported to the bathtub, the bath is operated after the preset determination time during the operation of the forced circulation type bath kettle device. When the temperature rise of the bath water measured by the return temperature sensor is less than the predetermined temperature, the operation of the heating means is interrupted, and the preset waiting time elapses while the circulation pump is operating for the preset pump drive time. After that, the temperature difference between the temperature of the bath water measured by the bath-going temperature sensor provided in the bath-going route and the temperature of the bath water measured by the bath-return temperature sensor is calculated, and When the temperature difference exceeds a preset reference temperature difference, the bath return temperature sensor is diagnosed as abnormal, and the operation of the forced circulation type bath cooker device is terminated, and when the temperature difference is less than or equal to the reference temperature difference, When the bath return temperature sensor is judged to be normal, the operation of the heating means and the circulation pump is restarted.
【００１０】風呂戻り温度センサが異常である可能性が
高いと判断した場合、加熱手段の運転は中断し、循環ポ
ンプは予め設定した駆動時間、例えば３０秒運転した後
運転を中断する。循環ポンプを運転することにより、浴
水が浴槽と加熱手段の間を強制循環するので、加熱手段
の残熱を短時間に除去することができる。その結果、加
熱手段の運転を中断してから予め設定した待ち時間、例
えば３０秒〜１分経過すれば、風呂往き経路に設けられ
た風呂往き温度センサで測定された浴水の温度の時間変
化と、風呂戻り経路に設けられた風呂戻り温度センサで
測定された浴水の温度の時間変化はいずれも小さくな
る。このため、風呂往き温度センサで測定される浴水の
温度と、風呂戻り温度センサで測定される浴水の温度と
の温度差を求めると、その温度差の時間変化も小さくな
る。従って、この温度差と基準温度差を比較することに
より風呂戻り温度センサの異常を診断することができ
る。When it is determined that the bath return temperature sensor is likely to be abnormal, the operation of the heating means is interrupted, and the circulation pump is operated for a preset drive time, for example, 30 seconds, and then interrupted. By operating the circulation pump, the bath water is forcedly circulated between the bath and the heating means, so that the residual heat of the heating means can be removed in a short time. As a result, if a preset waiting time, for example, 30 seconds to 1 minute elapses after the operation of the heating means is interrupted, the temperature change of the bath water temperature measured by the bath-going temperature sensor provided on the bath-going route is changed with time. Then, the time change of the temperature of the bath water measured by the bath return temperature sensor provided in the bath return path becomes small. Therefore, when the temperature difference between the bath water temperature measured by the bath-outgoing temperature sensor and the bath water temperature measured by the bath-return temperature sensor is obtained, the time change of the temperature difference also becomes small. Therefore, the abnormality of the bath return temperature sensor can be diagnosed by comparing this temperature difference with the reference temperature difference.
【００１１】[0011]
【発明の実施の形態】続いて、添付した図面を参照しつ
つ、本発明を具体化した実施の形態につき説明し、本発
明の理解に供する。ここに、図１は本発明の第１及び第
２の実施の形態に係る風呂戻り温度センサの異常診断方
法を適用した風呂設備の全体構成ブロック図、図２は本
発明の第１の実施の形態に係る風呂戻り温度センサの異
常診断方法を説明するフロー図である。図１に示すよう
に、本発明の第１及び第２の実施の形態に係る風呂戻り
温度センサの異常診断方法を適用した風呂設備１０は、
浴槽１１と、浴槽１１の浴水１２を加熱する際に設定温
度の指令を行う浴室操作部１３と、浴室操作部１３から
の指令を受けて浴水１２を加熱する風呂釜装置１４を有
している。また、風呂釜装置１４は、浴槽１１の浴水１
２を加熱する強制循環式風呂釜１５と、浴室操作部１３
からの指令を記憶して強制循環式風呂釜１５の運転制御
を行う制御手段１６とを備えている。以下、これらにつ
いて詳細に説明する。BEST MODE FOR CARRYING OUT THE INVENTION Next, referring to the attached drawings, an embodiment in which the present invention is embodied will be described to provide an understanding of the present invention. FIG. 1 is a block diagram showing the overall configuration of bath equipment to which the abnormality diagnosing method for bath return temperature sensors according to the first and second embodiments of the present invention is applied, and FIG. 2 is the first embodiment of the present invention. It is a flowchart explaining the abnormality diagnostic method of the bath return temperature sensor which concerns on a form. As shown in FIG. 1, a bath facility 10 to which an abnormality diagnosis method for a bath return temperature sensor according to the first and second embodiments of the present invention is applied,
It has a bathtub 11, a bathroom operation unit 13 that issues a command for a set temperature when heating the bathwater 12 in the bathtub 11, and a bath kettle device 14 that heats the bathwater 12 in response to a command from the bathroom operation unit 13. ing. In addition, the bath kettle device 14 uses the bath water 1 of the bathtub 11.
Forced circulation type bath kettle 15 for heating 2 and bathroom operation part 13
And a control means 16 for controlling the operation of the forced circulation type bath kettle 15 by storing the command from. Hereinafter, these will be described in detail.
【００１２】強制循環式風呂釜１５は、図１に示すよう
に、浴槽１１の側壁に形成された浴水の吸込み口１７及
び吐出し口１８を接続する循環経路１９と、循環経路１
９に接続された加熱手段の一例である熱交換器２０を有
している。ここで、吸込み口１７と吐出し口１８は、例
えば、浴槽１１の同一側壁にそれぞれ形成され、吸込み
口１７は吐出し口１８よりも浴槽１１の底側に設けられ
ている。吸込み口１７と熱交換器２０の熱交換部２８の
入口側を接続する風呂戻り経路２１には循環ポンプ２２
が配設され、循環ポンプ２２の上流側の風呂戻り経路２
１には吸込み口１７から循環ポンプ２２により吸引され
た浴水１２の温度を測定する風呂戻り温度センサの一例
である風呂戻りサーミスタ２３と、熱交換器２０の熱交
換部２８の入口側に向かう浴水１２の流水を検知する水
流スイッチ２４が配設されている。ここで、循環ポンプ
２２としては、ボリュート式やカスケード式等のポンプ
が用いられる。また、水流スイッチ２４としては、パド
ル式、電磁式、超音波式、カルマン流式、サーミスタ
式、水車式、羽根車式、差圧式の検知器を使用すること
ができる。また、熱交換器２０の熱交換部２８の出口側
と吐出し口１８を接続する風呂往き経路２５には、熱交
換器２０で加熱された浴水１２の温度を測定する風呂往
き温度センサの一例である風呂往きサーミスタ２６が設
けられている。なお、風呂戻り及び風呂往きの各温度セ
ンサとしてはサーミスタ以外に測温抵抗体や熱電対が使
用できる。As shown in FIG. 1, the forced circulation type bath kettle 15 has a circulation passage 19 formed on the side wall of the bath 11 for connecting a suction inlet 17 and a discharge outlet 18 of the bath water, and a circulation passage 1
It has the heat exchanger 20 which is an example of the heating means connected to 9. Here, the suction port 17 and the discharge port 18 are respectively formed on the same side wall of the bathtub 11, for example, and the suction port 17 is provided on the bottom side of the bathtub 11 with respect to the discharge port 18. A circulation pump 22 is provided in the bath return path 21 that connects the suction port 17 and the inlet side of the heat exchange unit 28 of the heat exchanger 20.
Is provided, and the bath return path 2 on the upstream side of the circulation pump 22 is provided.
1, a bath return thermistor 23, which is an example of a bath return temperature sensor that measures the temperature of the bath water 12 sucked by the circulation pump 22 from the suction port 17, and goes to the inlet side of the heat exchange unit 28 of the heat exchanger 20. A water flow switch 24 for detecting the flowing water of the bath water 12 is provided. Here, as the circulation pump 22, a volute type pump or a cascade type pump is used. As the water flow switch 24, a paddle type, electromagnetic type, ultrasonic type, Kalman flow type, thermistor type, water wheel type, impeller type, or differential pressure type detector can be used. In addition, a bath-going temperature sensor that measures the temperature of the bath water 12 heated by the heat exchanger 20 is provided in the bath-going path 25 that connects the outlet side of the heat exchange unit 28 of the heat exchanger 20 and the discharge port 18. A bath-going thermistor 26, which is an example, is provided. In addition to the thermistor, a resistance temperature detector or a thermocouple can be used as each of the temperature sensors for returning to and from the bath.
【００１３】熱交換器２０は、加熱源の一例であるガス
燃焼機構２７と、ガス燃焼機構２７で発生した熱で浴水
１２を加熱する熱交換部２８を有している。そして、ガ
ス燃焼機構２７にはガス点火部２９を備えたガスバーナ
３０と、ガスバーナ３０に燃料ガスを供給する燃料供給
管３１が設けられている。更に、燃料供給管３１には、
燃料ガスの供給及び停止を行う開閉弁の一例である電磁
弁３２と、電磁弁３２から供給された燃料ガスの流量調
整を行うガス流量調整機構の一例である電磁比例弁３３
が配設されている。このような構成とすることにより、
浴槽１１に貯留されている浴水１２を循環ポンプ２２を
運転して吸込み口１７から吸引し風呂戻り経路２１を介
して熱交換器２０に導入し、風呂戻りサーミスタ２３の
測定結果に基づいて加熱することがでる。また、加熱さ
れた浴水１２を風呂往き経路２５内を流水させて、風呂
往きサーミスタ２６で温度を測定してから吐出し口１８
より浴槽１１内に排出させることができる。The heat exchanger 20 has a gas combustion mechanism 27 which is an example of a heat source, and a heat exchange section 28 which heats the bath water 12 with the heat generated by the gas combustion mechanism 27. The gas combustion mechanism 27 is provided with a gas burner 30 having a gas ignition unit 29, and a fuel supply pipe 31 for supplying a fuel gas to the gas burner 30. Further, in the fuel supply pipe 31,
A solenoid valve 32, which is an example of an on-off valve that supplies and stops the fuel gas, and a solenoid proportional valve 33, which is an example of a gas flow rate adjusting mechanism that adjusts the flow rate of the fuel gas supplied from the solenoid valve 32.
Is provided. With this configuration,
The bath water 12 stored in the bathtub 11 is driven by the circulation pump 22 to be sucked from the suction port 17 and introduced into the heat exchanger 20 via the bath return path 21, and heated based on the measurement result of the bath return thermistor 23. You can do it. Further, the heated bath water 12 is made to flow in the bath-going path 25, the temperature is measured by the bath-going thermistor 26, and then the discharge port 18 is provided.
It can be discharged into the bathtub 11 more.
【００１４】浴室操作部１３には、浴水１２を加熱する
際の設定温度を入力させたり、強制循環式風呂釜１５の
運転中に設定温度の変更のために新たに設定温度を入力
させて制御手段１６に伝える機能、制御手段１６との連
携動作を行うための通信信号のやり取りを行う通信機能
が設けられている。このような機能を有する浴室操作部
１３は、例えばマイクロコンピュータを用いて構成する
ことができる。制御手段１６には、浴室操作部１３との
連携動作のための通信を行う通信機能、浴室操作部１３
からの運転指令信号を受信して強制循環式風呂釜１５の
運転制御を行う運転制御部が設けられている。そして、
運転制御部には、浴水１２の加熱を行いながら風呂戻り
サーミスタ２３の異常を診断するサーミスタ異常診断機
能が設けられている。ここで、制御手段１６は、例えば
マイクロコンピュータから構成され、風呂戻りサーミス
タ２３、風呂往きサーミスタ２６、水流スイッチ２４の
各検知信号が入力されている。制御手段１６内には予め
設定された各種運転内容に応じて、循環ポンプ２２、ガ
ス点火部２９、電磁弁３２、電磁比例弁３３の運転及び
動作を制御するプログラムが格納されている。このた
め、浴室操作部１３から設定温度に関する運転指令信号
が制御手段１６に入力されると、運転指令信号と風呂戻
りサーミスタ２３、風呂往きサーミスタ２６及び水流ス
イッチ２４の検知信号に基づいて、循環ポンプ２２、ガ
ス点火部２９、電磁弁３２、電磁比例弁３３の運転及び
動作が行われて強制循環式風呂釜１５の運転が開始され
る。また、強制循環式風呂釜１５の運転が開始されると
共にサーミスタ異常診断機能の運転が開始され、強制循
環式風呂釜１５の運転制御中は常に風呂戻りサーミスタ
２３の異常診断が行われる。In the bathroom operation unit 13, a set temperature for heating the bath water 12 is inputted, or a new set temperature is inputted for changing the set temperature while the forced circulation type bath kettle 15 is in operation. A function for transmitting to the control means 16 and a communication function for exchanging communication signals for performing a cooperative operation with the control means 16 are provided. The bathroom operation unit 13 having such a function can be configured using, for example, a microcomputer. The control means 16 has a communication function for performing communication for cooperation with the bathroom operation unit 13, and the bathroom operation unit 13
An operation control unit is provided for receiving an operation command signal from the control unit and controlling the operation of the forced circulation type bath kettle 15. And
The operation control unit is provided with a thermistor abnormality diagnosis function for diagnosing an abnormality of the bath return thermistor 23 while heating the bath water 12. Here, the control means 16 is composed of, for example, a microcomputer, and each detection signal of the bath return thermistor 23, the bath leaving thermistor 26, and the water flow switch 24 is input. A program for controlling the operation and operation of the circulation pump 22, the gas ignition unit 29, the solenoid valve 32, and the solenoid proportional valve 33 is stored in the control means 16 in accordance with various preset operation contents. Therefore, when the operation command signal related to the set temperature is input from the bathroom operation unit 13 to the control means 16, the circulation pump is generated based on the operation command signal and the detection signals of the bath return thermistor 23, the bath going thermistor 26, and the water flow switch 24. 22, the gas ignition unit 29, the solenoid valve 32, and the solenoid proportional valve 33 are operated and operated to start the operation of the forced circulation bathtub 15. Further, the operation of the forced circulation type bath kettle 15 is started and the operation of the thermistor abnormality diagnosis function is started, and during the operation control of the forced circulation type bath kettle 15, the abnormality diagnosis of the bath return thermistor 23 is always performed.
【００１５】次に、本発明の第１の実施の形態に係る風
呂戻り温度センサの異常診断方法について、図１、図２
を用いて詳細に説明する。制御手段１６が浴室操作部１
３から浴水１２を加熱する際の設定温度の指示と運転指
令信号を受信して強制循環式風呂釜１５の運転を開始す
ると（Ｓ１）、制御手段１６ではサーミスタ異常診断機
能が起動して、風呂戻りサーミスタ２３で測定した浴水
１２の温度（以下、風呂戻り温度という）を風呂の基準
温度としてセットすると共に、制御手段１６内に予め格
納されている判定時間（例えば、５分間）の読み込みが
行われる（Ｓ２）。次いで、風呂戻り温度と浴室操作部
１３で設定した設定温度とを比較して風呂戻り温度が設
定温度以上の場合は（Ｓ３）、浴水１２の沸き上げが終
了したと判断して強制循環式風呂釜１５の沸き上げ運転
を終了（正常終了）する（Ｓ４）。一方、風呂戻り温度
が浴室操作部１３で設定された設定温度未満の場合は
（Ｓ３）、判定時間が経過するまで予めプログラムされ
た方法で強制循環式風呂釜１５の運転が継続される（Ｓ
５）。このとき、常時、風呂戻りサーミスタ２３で測定
した風呂戻り温度と設定温度との比較が行われて、風呂
戻り温度が設定温度以上になった場合は（Ｓ３）、強制
循環式風呂釜１５の沸き上げ運転を終了する（Ｓ４）。Next, a method for diagnosing an abnormality in the bath return temperature sensor according to the first embodiment of the present invention will be described with reference to FIGS.
Will be described in detail. The control means 16 is the bathroom operation unit 1.
When the instruction of the set temperature for heating the bath water 12 and the operation instruction signal are received from 3 to start the operation of the forced circulation type bath kettle 15 (S1), the control means 16 activates the thermistor abnormality diagnosis function, The temperature of the bath water 12 measured by the bath return thermistor 23 (hereinafter referred to as bath return temperature) is set as the reference temperature of the bath, and the determination time (for example, 5 minutes) stored in advance in the control means 16 is read. Is performed (S2). Next, the bath return temperature is compared with the set temperature set by the bathroom operation unit 13, and if the bath return temperature is equal to or higher than the set temperature (S3), it is determined that the boiling of the bath water 12 has ended, and the forced circulation system is used. The boiling operation of the bath kettle 15 is terminated (normal termination) (S4). On the other hand, when the bath return temperature is lower than the set temperature set by the bathroom operation unit 13 (S3), the operation of the forced circulation bath hook 15 is continued by a preprogrammed method until the determination time elapses (S3).
5). At this time, the bath return temperature measured by the bath return thermistor 23 is constantly compared with the set temperature, and when the bath return temperature is equal to or higher than the set temperature (S3), the forced circulation type bath kettle 15 is boiled. The raising operation is finished (S4).
【００１６】風呂戻り温度が設定温度未満の場合で、強
制循環式風呂釜１５の運転が判定時間経過すると（Ｓ
５）、風呂戻り温度と比較温度（風呂の基準温度＋１℃
の温度）との比較が行われる（Ｓ６）。ここで、比較温
度として風呂の基準温度より１℃高い温度を設定したの
は、使用している強制循環式風呂釜１５の能力から、強
制循環式風呂釜１５の運転が５分間継続された後の風呂
戻り温度は、強制循環式風呂釜１５の運転が開始された
ときの温度（風呂の基準温度）より１℃以上は必ず上昇
することが予め確認されているためである。従って、風
呂戻り温度が風呂の基準温度より１℃以上高い場合は、
風呂戻りサーミスタ２３で正常に風呂戻り温度が測定で
きた、すなわち、風呂戻りサーミスタ２３は正常である
と診断でき、第１段階の加熱が終了して第２段階の加熱
が行われる（Ｓ２）。When the bath return temperature is lower than the set temperature and the operation of the forced circulation type bath kettle 15 has passed the determination time (S
5) Bath return temperature and comparison temperature (bath reference temperature + 1 ° C
Temperature) is compared (S6). Here, the temperature that is 1 ° C. higher than the reference temperature of the bath is set as the comparison temperature after the operation of the forced circulation type bath kettle 15 is continued for 5 minutes because of the capacity of the forced circulation type bath kettle 15 used. This is because it has been confirmed in advance that the bath return temperature of 1 always rises by 1 ° C. or more from the temperature when the operation of the forced circulation bath kettle 15 is started (reference temperature of the bath). Therefore, if the bath return temperature is higher than the bath reference temperature by 1 ° C or more,
The bath return thermistor 23 can normally measure the bath return temperature, that is, the bath return thermistor 23 can be diagnosed as normal, and the first stage heating is completed and the second stage heating is performed (S2).
【００１７】第２段階の加熱が開始する前に、第１段階
の加熱の終了時に測定された風呂戻り温度が風呂の基準
温度としてセットされ、判定時間には制御手段１６内に
格納されている判定時間が読み込み込まれる（Ｓ２）。
第２段階の加熱では、風呂戻りサーミスタ２３が正常な
場合はＳ２、Ｓ３、Ｓ５の操作が行われて、風呂戻り温
度が設定温度以上になった時点で（Ｓ３）、強制循環式
風呂釜１５の沸き上げ運転を終了する（Ｓ４）。第２段
階の加熱を終了しても風呂戻り温度が設定温度未満の場
合は第３段階の加熱、第３段階の加熱を終了しても風呂
戻り温度が設定温度未満の場合は第４段階の加熱という
ように、風呂戻り温度が設定温度以上となるまで加熱が
繰り返される。Before the heating of the second stage is started, the bath return temperature measured at the end of the heating of the first stage is set as the reference temperature of the bath and stored in the control means 16 at the determination time. The judgment time is read (S2).
In the heating of the second stage, when the bath return thermistor 23 is normal, the operations of S2, S3, and S5 are performed, and when the bath return temperature becomes equal to or higher than the set temperature (S3), the forced circulation bathtub 15 The boiling operation of is finished (S4). If the bath return temperature is below the set temperature even after the second stage heating is completed, the third stage heating is performed. If the bath return temperature is below the set temperature even after the third stage heating is completed, the fourth stage heating is performed. Like heating, heating is repeated until the bath return temperature reaches or exceeds the set temperature.
【００１８】各段階の加熱で判定時間が経過しても、風
呂戻り温度＜風呂の基準温度＋１℃の場合は（Ｓ６）、
風呂戻りサーミスタ２３で正常に風呂戻り温度が測定さ
れていない可能性があると診断し、サーミスタ判定を行
う処理（Ｓ７）に移行する。先ず、熱交換機２０及び循
環ポンプ２２の運転が直ちに中断される。そして、熱交
換機２０及び循環ポンプ２２の運転停止後、制御手段１
６内に予め格納されている待ち時間（例えば２０分間）
が経過するまで待機が行われる。待機している間に、浴
水１２は自然対流により、浴槽１１→風呂戻り経路２１
→熱交換部２８→風呂往き経路２５→浴槽１１の経路を
循環する。その結果、風呂戻りサーミスタ２３、風呂往
きサーミスタ２６が共に正常であれば、風呂戻り温度と
風呂往きサーミスタ２６で測定した浴水の温度（以下、
風呂往き温度という）とは徐々に接近し、待ち時間経過
後にはそれぞれ所定温度に到達する。ここで各所定温度
は、強制循環式風呂釜１５の特性把握試験から予め求め
ることができる。従って、待ち時間経過後の風呂往き温
度と風呂戻り温度との温度差は、各所定温度の上限と下
限から決まる基準温度差以下になる。ここで、２０分の
待ち時間による自然対流条件下で各所定温度の上限と下
限から決まる基準温度差を、例えば５℃とする。風呂往
き温度と風呂戻り温度との温度差が５℃以下の場合、風
呂往き温度、風呂戻り温度はそれぞれ風呂戻りサーミス
タ２３、風呂往きサーミスタ２６で正常に温度が測定で
きた、すなわち、風呂戻りサーミスタ２３、風呂往きサ
ーミスタ２６は正常であると診断し（Ｓ８）、循環ポン
プ２２、熱交換器２０の運転を再開し、次の段階の加熱
に移行する（Ｓ２）。If the bath return temperature <bath reference temperature + 1 ° C. even after the judgment time elapses in heating at each stage (S6),
The bath return thermistor 23 diagnoses that the bath return temperature may not be normally measured, and shifts to the process (S7) of performing the thermistor determination. First, the operation of the heat exchanger 20 and the circulation pump 22 is immediately interrupted. Then, after stopping the operation of the heat exchanger 20 and the circulation pump 22, the control means 1
Wait time stored in advance in 6 (for example, 20 minutes)
Is waited for. While waiting, the bath water 12 is naturally convected to the bathtub 11 and the bath return path 21.
→ The heat exchanging section 28 → Bath going route 25 → Bath 11 is circulated. As a result, if both the bath return thermistor 23 and the bath leaving thermistor 26 are normal, the bath return temperature and the temperature of the bath water measured by the bath returning thermistor 26 (hereinafter,
The bath temperature) is gradually approached, and after reaching the waiting time, each reaches a predetermined temperature. Here, each predetermined temperature can be obtained in advance from a characteristic grasping test of the forced circulation type bath kettle 15. Therefore, the temperature difference between the bath-going temperature and the bath-returning temperature after the waiting time is equal to or less than the reference temperature difference determined by the upper limit and the lower limit of each predetermined temperature. Here, the reference temperature difference determined from the upper limit and the lower limit of each predetermined temperature under natural convection conditions with a waiting time of 20 minutes is, for example, 5 ° C. When the temperature difference between the bath-going temperature and the bath-going temperature is 5 ° C. or less, the bath-going temperature and the bath-going temperature could be measured normally by the bath-going thermistor 23 and the bath-going thermistor 26, that is, the bath-going thermistor. 23, the bath-out thermistor 26 is diagnosed to be normal (S8), the operation of the circulation pump 22 and the heat exchanger 20 is restarted, and the heating of the next stage is started (S2).
【００１９】２０分の待ち時間経過後、風呂往き温度と
風呂戻り温度との温度差が５℃を超える場合、風呂戻り
温度、風呂往き温度はそれぞれ風呂戻りサーミスタ２
３、風呂往きサーミスタ２６で正常に温度が測定されて
いない、すなわち、風呂戻りサーミスタ２３、風呂往き
サーミスタ２６の両者又は一方が異常であると推定でき
る。ここで、風呂往きサーミスタ２６は熱交換機２０の
過熱異常を検知するセンサとして使用しており、熱交換
機２０が運転可能であれば風呂往きサーミスタ２６は正
常に機能していると判定できる。このため、熱交換機２
０が運転可能なことを考慮すると、風呂往き温度と風呂
戻り温度との温度差が５℃を超える場合は（Ｓ８）、風
呂戻りサーミスタ２３で正常に温度が測定されていな
い、すなわち、風呂戻りサーミスタ２３が異常であると
診断する（Ｓ９）。この場合、風呂戻り温度の正確な測
定ができないので、強制循環式風呂釜１５の運転を強制
終了する（Ｓ１０）。After the waiting time of 20 minutes, if the temperature difference between the bath return temperature and the bath return temperature exceeds 5 ° C., the bath return temperature and the bath return temperature are respectively the bath return thermistor 2
3. It can be estimated that the temperature is not normally measured by the bath-going thermistor 26, that is, both or one of the bath-return thermistor 23 and the bath-going thermistor 26 is abnormal. Here, the bath-going thermistor 26 is used as a sensor for detecting an overheat abnormality of the heat exchanger 20, and if the heat-exchanger 20 is operable, it can be determined that the bath-going thermistor 26 is functioning normally. Therefore, the heat exchanger 2
Considering that 0 can be operated, when the temperature difference between the bath return temperature and the bath return temperature exceeds 5 ° C. (S8), the temperature is not normally measured by the bath return thermistor 23, that is, the bath return is performed. It is diagnosed that the thermistor 23 is abnormal (S9). In this case, since the bath return temperature cannot be accurately measured, the operation of the forced circulation bath kettle 15 is forcibly terminated (S10).
【００２０】本発明の第２の実施の形態に係る風呂戻り
温度センサの異常診断方法では、予め設定した判定時間
（例えば、５分間）後、風呂戻り温度＜風呂の基準温度
＋１℃となったときに、熱交換器２０の運転のみ中断
し、循環ポンプ２２は熱交換器２０の運転が中断してか
ら予め設定したポンプ駆動時間、例えば３０秒〜１分が
経過するまで運転を継続することが特徴となっており、
これ以外は前記した第１の実施の形態に係る風呂戻り温
度センサの異常診断方法と実質的に同一である。循環ポ
ンプ２２の運転を予め設定したポンプ駆動時間だけ運転
することにより、浴水１２は強制的に浴槽１１→風呂戻
り経路２１→熱交換部２８→風呂往き経路２５→浴槽１
１を循環し、熱交換部２８の残熱の影響が短時間で消失
する。その結果、風呂戻り温度と風呂往き温度とは素早
く接近し、短い待ち時間でそれぞれ所定温度に到達する
ことができる。従って、循環ポンプ２２を熱交換器２０
の運転が中断してから予め設定したポンプ駆動時間だけ
更に運転することは、サーミスタ判定における待ち時間
の短縮化が可能となる。しかし、サーミスタ判定の方法
が変わることにはならないので、第２の実施の形態に係
る風呂戻り温度センサの異常診断方法についての説明は
省略する。なお、循環ポンプ２２を熱交換器２０の運転
が中断してから更に３０秒〜１分運転することで、例え
ば、待ち時間を３０秒〜１分とすることができる。In the abnormality diagnosing method for the bath return temperature sensor according to the second embodiment of the present invention, the bath return temperature becomes less than the bath reference temperature + 1 ° C. after a preset determination time (for example, 5 minutes). Sometimes, only the operation of the heat exchanger 20 is interrupted, and the circulation pump 22 continues the operation until the preset pump drive time, for example, 30 seconds to 1 minute elapses after the operation of the heat exchanger 20 is interrupted. Is a feature,
Other than this, the method is substantially the same as the method for diagnosing an abnormality in the bath return temperature sensor according to the first embodiment described above. By operating the circulation pump 22 only for a preset pump drive time, the bath water 12 is forcibly forced into the bath water 12 → bath return path 21 → heat exchange section 28 → bath going path 25 → bath 1
1, the influence of the residual heat of the heat exchange section 28 disappears in a short time. As a result, the bath returning temperature and the bath leaving temperature can quickly approach each other and reach the respective predetermined temperatures with a short waiting time. Therefore, the circulation pump 22 is connected to the heat exchanger 20.
If the pump is further operated for the preset pump drive time after the operation is stopped, the waiting time in the thermistor determination can be shortened. However, since the method of determining the thermistor does not change, the description of the method for diagnosing the abnormality of the bath return temperature sensor according to the second embodiment will be omitted. By operating the circulation pump 22 for 30 seconds to 1 minute after the operation of the heat exchanger 20 is interrupted, the waiting time can be set to 30 seconds to 1 minute, for example.
【００２１】以上、本発明の実施の形態を説明したが、
本発明は、この実施の形態に限定されるものではなく、
例えば、判定時間を５分としたが３分以上の範囲で任意
に設定することができ、夏場や冬場等の季節に応じて判
定時間を変更するようにすることも可能である。また、
風呂戻りサーミスタの異常診断方法を風呂往きサーミス
タの異常診断にも適用することができる。The embodiment of the present invention has been described above.
The present invention is not limited to this embodiment,
For example, the determination time is set to 5 minutes, but it can be set arbitrarily within the range of 3 minutes or more, and the determination time can be changed according to the season such as summer or winter. Also,
The abnormality diagnosis method for the bath return thermistor can be applied to the abnormality diagnosis for the bath return thermistor.
【００２２】[0022]
【発明の効果】請求項１記載の風呂戻り温度センサの異
常診断方法においては、強制循環式風呂釜装置の運転
中、予め設定した判定時間後に風呂戻り温度センサで測
定した浴水の温度の上昇が所定温度未満である場合には
加熱手段及び循環ポンプの運転を中断し、予め設定した
待ち時間経過後に、風呂往き経路に設けられた風呂往き
温度センサで測定した浴水の温度と風呂戻り温度センサ
で測定した浴水の温度との温度差を求めて、温度差が予
め設定した基準温度差を超えた場合は風呂戻り温度セン
サを異常と診断して強制循環式風呂釜装置の運転を終了
させ、温度差が基準温度差以下の場合は風呂戻り温度セ
ンサを正常と判断して加熱手段及び循環ポンプの運転を
再開するので、強制循環式風呂釜装置の運転中に確実に
風呂戻り温度センサの異常を診断でき、浴槽の浴水が高
温になることを防止できる。In the abnormality diagnosing method for the bath return temperature sensor according to the first aspect of the present invention, the temperature of the bath water measured by the bath return temperature sensor rises after a preset judgment time during the operation of the forced circulation bath device. If the temperature is lower than the predetermined temperature, the operation of the heating means and the circulation pump is interrupted, and after the waiting time set in advance, the bath water temperature and the bath return temperature measured by the bath-going temperature sensor provided in the bath-going route. The temperature difference from the bath water temperature measured by the sensor is calculated, and if the temperature difference exceeds the preset reference temperature difference, the bath return temperature sensor is diagnosed as abnormal and the operation of the forced circulation bath kettle device is terminated. If the temperature difference is less than the reference temperature difference, the bath return temperature sensor is judged to be normal and the operation of the heating means and the circulation pump is restarted. Can diagnose abnormal, it is possible to prevent the tub bath water becomes hot.
【００２３】請求項２記載の風呂戻り温度センサの異常
診断方法においては、強制循環式風呂釜装置の運転中、
予め設定した判定時間後に風呂戻り温度センサで測定し
た浴水の温度の上昇が所定温度未満である場合には加熱
手段の運転を中断し、循環ポンプを予め設定したポンプ
駆動時間運転しながら予め設定した待ち時間経過後に、
風呂往き経路に設けられた風呂往き温度センサで測定し
た浴水の温度と風呂戻り温度センサで測定した浴水の温
度との温度差を求めて、温度差が予め設定した基準温度
差を超えた場合は風呂戻り温度センサを異常と診断して
強制循環式風呂釜装置の運転を終了させ、温度差が基準
温度差以下の場合は風呂戻り温度センサを正常と判断し
て加熱手段及び循環ポンプの運転を再開するので、強制
的に循環ポンプで浴水を循環することで素早く加熱手段
の残熱を除去して風呂往き温度センサで測定される浴水
の温度と風呂戻り温度センサで測定される浴水の温度の
均一化を図ることができ、風呂戻り温度センサの異常の
診断を短時間に行うことが可能となる。In the abnormality diagnosing method for the bath return temperature sensor according to the second aspect, during the operation of the forced circulation type bath cooker,
When the temperature of the bath water measured by the bath return temperature sensor is lower than the predetermined temperature after the preset judgment time, the operation of the heating means is interrupted, and the circulation pump is preset while operating for the preset pump drive time. After the waiting time
The temperature difference between the bath water temperature measured by the bath-going temperature sensor provided in the bath-going path and the bath water temperature measured by the bath-going temperature sensor was found, and the temperature difference exceeded the preset reference temperature difference. In this case, the bath return temperature sensor is diagnosed as abnormal and the operation of the forced circulation type bath heater device is terminated.If the temperature difference is less than the reference temperature difference, the bath return temperature sensor is judged to be normal and the heating means and circulation pump Since the operation is restarted, the residual water of the heating means is quickly removed by forcibly circulating the bath water with the circulation pump, and the bath water temperature measured by the bath-going temperature sensor and the bath return temperature sensor are measured. The temperature of the bath water can be made uniform, and the abnormality of the bath return temperature sensor can be diagnosed in a short time.
【図１】本発明の第１及び第２の実施の形態に係る風呂
戻り温度センサの異常診断方法を適用した風呂設備の全
体構成ブロック図である。FIG. 1 is an overall configuration block diagram of bath equipment to which a bath return temperature sensor abnormality diagnosis method according to first and second embodiments of the present invention is applied.
【図２】本発明の第１の実施の形態に係る風呂戻り温度
センサの異常診断方法を説明するフロー図である。FIG. 2 is a flowchart illustrating a method for diagnosing an abnormality in the bath return temperature sensor according to the first embodiment of the present invention.
１０：風呂設備、１１：浴槽、１２：浴水、１３：浴室
操作部、１４：風呂釜装置、１５：強制循環式風呂釜、
１６：制御手段、１７：吸込み口、１８：吐出し口、１
９：循環経路、２０：熱交換器、２１：風呂戻り経路、
２２：循環ポンプ、２３：風呂戻りサーミスタ、２４：
水流スイッチ、２５：風呂往き経路、２６：風呂往きサ
ーミスタ、２７：ガス燃焼機構、２８：熱交換部、２
９：ガス点火部、３０：ガスバーナ、３１：燃料供給
管、３２：電磁弁、３３：電磁比例弁10: Bath equipment, 11: Bathtub, 12: Bath water, 13: Bathroom operation unit, 14: Bath pot device, 15: Forced circulation bath pot,
16: control means, 17: suction port, 18: discharge port, 1
9: circulation path, 20: heat exchanger, 21: bath return path,
22: Circulation pump, 23: Bath return thermistor, 24:
Water flow switch, 25: bathing path, 26: bathing thermistor, 27: gas combustion mechanism, 28: heat exchange section, 2
9: Gas ignition part, 30: Gas burner, 31: Fuel supply pipe, 32: Solenoid valve, 33: Electromagnetic proportional valve
Claims (2)
で加熱手段に輸送し、加熱した前記浴水を風呂往き経路
で前記浴槽に輸送する強制循環式風呂釜装置の前記風呂
戻り経路に設けられた風呂戻り温度センサの異常診断方
法において、前記強制循環式風呂釜装置の運転中、予め
設定した判定時間後に前記風呂戻り温度センサで測定し
た前記浴水の温度の上昇が所定温度未満である場合には
前記加熱手段及び前記循環ポンプの運転を中断し、予め
設定した待ち時間経過後に、前記風呂往き経路に設けら
れた風呂往き温度センサで測定した前記浴水の温度と前
記風呂戻り温度センサで測定した前記浴水の温度との温
度差を求めて、前記温度差が予め設定した基準温度差を
超えた場合は前記風呂戻り温度センサを異常と診断して
前記強制循環式風呂釜装置の運転を終了させ、前記温度
差が前記基準温度差以下の場合は前記風呂戻り温度セン
サを正常と判断して前記加熱手段及び前記循環ポンプの
運転を再開することを特徴とする風呂戻り温度センサの
異常診断方法。1. The bath return path of a forced circulation type bath kettle device in which bath water in a bathtub is transported to a heating means in a bath return path by a circulation pump and the heated bathwater is transported to the bathtub in a bath trip path. In the method for diagnosing an abnormality in the provided bath return temperature sensor, during the operation of the forced circulation type bath heater device, if the temperature rise of the bath water measured by the bath return temperature sensor is less than a predetermined temperature after a preset determination time. In some cases, the operation of the heating means and the circulation pump is interrupted, and after a preset waiting time elapses, the bath water temperature and the bath return temperature measured by the bath-going temperature sensor provided in the bath-going route. The temperature difference from the temperature of the bath water measured by the sensor is obtained, and when the temperature difference exceeds a preset reference temperature difference, the bath return temperature sensor is diagnosed as abnormal and the forced circulation type bath. When the temperature difference is equal to or less than the reference temperature difference, the operation of the hook device is terminated, and the bath return temperature sensor is judged to be normal, and the operation of the heating means and the circulation pump is restarted. Abnormality diagnosis method for temperature sensor.
で加熱手段に輸送し、加熱した前記浴水を風呂往き経路
で前記浴槽に輸送する強制循環式風呂釜装置の前記風呂
戻り経路に設けられた風呂戻り温度センサの異常診断方
法において、前記強制循環式風呂釜装置の運転中、予め
設定した判定時間後に前記風呂戻り温度センサで測定し
た前記浴水の温度の上昇が所定温度未満である場合には
前記加熱手段の運転を中断し、前記循環ポンプを予め設
定したポンプ駆動時間運転しながら予め設定した待ち時
間経過後に、前記風呂往き経路に設けられた風呂往き温
度センサで測定した前記浴水の温度と前記風呂戻り温度
センサで測定した前記浴水の温度との温度差を求めて、
前記温度差が予め設定した基準温度差を超えた場合は前
記風呂戻り温度センサを異常と診断して前記強制循環式
風呂釜装置の運転を終了させ、前記温度差が前記基準温
度差以下の場合は前記風呂戻り温度センサを正常と判断
して前記加熱手段及び前記循環ポンプの運転を再開する
ことを特徴とする風呂戻り温度センサの異常診断方法。2. The bath return path of a forced circulation type bath kettle device, in which the bath water in the bathtub is transported to the heating means by the circulation pump in the bath return path and the heated bathwater is transported in the bath return path to the bathtub. In the method for diagnosing an abnormality in the provided bath return temperature sensor, during the operation of the forced circulation type bath heater device, if the temperature rise of the bath water measured by the bath return temperature sensor is less than a predetermined temperature after a preset determination time. In some cases, the operation of the heating means is interrupted, the circulating pump is operated for a preset pump drive time, and after a preset waiting time has elapsed, the temperature measured by a bath-going temperature sensor provided in the bath-going route is measured. Obtaining the temperature difference between the temperature of the bath water and the temperature of the bath water measured by the bath return temperature sensor,
When the temperature difference exceeds a preset reference temperature difference, the bath return temperature sensor is diagnosed as abnormal and the operation of the forced circulation bath cooker device is terminated, and the temperature difference is equal to or less than the reference temperature difference. Is deciding that the bath return temperature sensor is normal and restarts the operation of the heating means and the circulation pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001357376A JP3810306B2 (en) | 2001-11-22 | 2001-11-22 | Abnormality diagnosis method for bath return temperature sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001357376A JP3810306B2 (en) | 2001-11-22 | 2001-11-22 | Abnormality diagnosis method for bath return temperature sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003161520A true JP2003161520A (en) | 2003-06-06 |
| JP3810306B2 JP3810306B2 (en) | 2006-08-16 |
Family
ID=19168727
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001357376A Expired - Fee Related JP3810306B2 (en) | 2001-11-22 | 2001-11-22 | Abnormality diagnosis method for bath return temperature sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3810306B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013024503A (en) * | 2011-07-24 | 2013-02-04 | Rinnai Corp | Hot water heating device |
| JP2015177569A (en) * | 2014-03-13 | 2015-10-05 | トヨタ自動車株式会社 | electric vehicle |
| JP2016008770A (en) * | 2014-06-24 | 2016-01-18 | 株式会社ノーリツ | Hot water supply device |
-
2001
- 2001-11-22 JP JP2001357376A patent/JP3810306B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013024503A (en) * | 2011-07-24 | 2013-02-04 | Rinnai Corp | Hot water heating device |
| JP2015177569A (en) * | 2014-03-13 | 2015-10-05 | トヨタ自動車株式会社 | electric vehicle |
| JP2016008770A (en) * | 2014-06-24 | 2016-01-18 | 株式会社ノーリツ | Hot water supply device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3810306B2 (en) | 2006-08-16 |
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