JPH0760016B2 - Bath water heater - Google Patents
Bath water heaterInfo
- Publication number
- JPH0760016B2 JPH0760016B2 JP4163528A JP16352892A JPH0760016B2 JP H0760016 B2 JPH0760016 B2 JP H0760016B2 JP 4163528 A JP4163528 A JP 4163528A JP 16352892 A JP16352892 A JP 16352892A JP H0760016 B2 JPH0760016 B2 JP H0760016B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- water
- hot water
- flow rate
- mixing ratio
- 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.)
- Expired - Fee Related
Links
Landscapes
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
- Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
- Control For Baths (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明はバイパスミキシング方式
を採用する風呂給湯装置に係るものであり、特に浴槽へ
の落とし込み給湯時の他栓使用の判定を、確実に可能と
した風呂給湯装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bath water heater using a bypass mixing system, and more particularly to a bath water heater capable of reliably determining the use of another plug when dropping water into a bath. Is.
【0002】[0002]
【従来の技術】旧来、風呂給湯装置は、風呂の落とし込
み給湯や、風呂の追焚等の浴室内への給湯のみに使用さ
れる浴室専用の給湯器として設計され、使用されてき
た。2. Description of the Related Art Traditionally, a bath water heater has been designed and used as a water heater exclusively for a bathroom, which is used only for dropping a hot water supply in the bath or for heating the bath to heat the inside of the bath.
【0003】しかし近年では、設置スペース等の問題か
ら風呂給湯装置を単なる浴室専用として使用するのでは
なく、台所や洗面台等の他栓への一般給湯も可能とする
要求が強い。In recent years, however, there is a strong demand for general hot water supply to other taps such as the kitchen and washbasin, rather than using the bath hot water supply device only for the bathroom due to the problem of installation space and the like.
【0004】ところが風呂給湯装置を台所等の一般給湯
に併用する場合、例えば風呂の落とし込み給湯と台所へ
の給湯をそれぞれ別々の時間に行う場合は大きな問題は
ないが、風呂の落とし込み給湯の最中に台所への給湯要
求があった場合は、甚だ困難な問題がある。However, when the bath water heater is used together with general hot water for the kitchen, for example, when the bath hot water supply and the kitchen hot water supply are performed at different times, there is no big problem, but during the bath hot water supply. If there was a request for hot water to the kitchen, there would be a serious problem.
【0005】すなわち、一般に台所等で要求される湯の
温度と、風呂の落とし込み給湯で要求される湯の温度は
相違する。従って風呂の落とし込み給湯の最中に台所へ
の給湯要求があった場合は、いずれか一方が要求する湯
温に統一して給湯するか、あるいはいずれかの給湯を優
先して一方への給湯を一時的に停止する必要がある。That is, the temperature of hot water generally required in the kitchen and the like are different from the temperature of hot water required for dropping hot water in a bath. Therefore, if there is a request for hot water supply to the kitchen while hot water is being dropped into the bath, either one of the hot water sources should be standardized to supply hot water, or one of the hot water supplies should be prioritized. It is necessary to stop temporarily.
【0006】そこで風呂給湯装置を台所等の一般給湯に
併用する場合は、風呂の落とし込み給湯の最中に台所等
の他栓が開かれて、他栓使用がなされているかどうかの
判定を行う機能を有することが不可欠である。[0006] Therefore, when the bath water heater is used together with general hot water in the kitchen or the like, a function for determining whether or not the other plug is used by opening the other plug in the kitchen while dropping the bath It is essential to have
【0007】このような、風呂の落とし込み給湯の最中
に、台所等の他栓が開かれて他栓使用がなされているか
どうかの判定を行う最も単純な構成としては、風呂への
落とし込み回路が分岐された部分よりも下流に相当する
主水路内に、水流の有無を検知する水流スイッチを設
け、この水流スイッチの作動中は、台所等の他栓が使用
されているものと判断するものがある。[0007] As the simplest configuration for determining whether or not the other plug of the kitchen or the like is opened and the other plug is used during the hot water supply of the bath, the drop circuit for the bath is A water flow switch that detects the presence or absence of water flow is installed in the main waterway that is downstream of the branched portion, and it is judged that other plugs such as kitchen are used while the water flow switch is operating. is there.
【0008】図7は、上記した水流スイッチにより他栓
使用の判定をする従来技術の風呂給湯装置の構成図であ
る。なお、図7の水流スイッチを除く基本構成は特開平
4−76350号において本出願人が既に開示したもの
である。FIG. 7 is a block diagram of a bath water heater of the prior art which uses the above water flow switch to determine the use of the other plug. The basic configuration except the water flow switch shown in FIG. 7 has already been disclosed by the present applicant in JP-A-4-76350.
【0009】図7において、Bは従来技術の風呂給湯装
置であり、大きく分けると、熱交換器2を通る主水路1
と、熱交換器2と平行して主水路1に設けられたバイパ
ス水路3と、主水路1の湯水混合部以下、すなわち従来
例では流量可変手段9の下流から分岐された落とし込み
水路4より構成される。主水路1の入口側は市水から分
岐されており、一方主水路1の落とし込み水路4の分岐
点30以降は、台所や洗面所等の他栓に接続されてい
る。In FIG. 7, B is a prior art bath water heater, which is roughly divided into a main water channel 1 passing through a heat exchanger 2.
And a bypass water channel 3 provided in the main water channel 1 in parallel with the heat exchanger 2, and a hot water mixing section below the main water channel 1, that is, in the conventional example, a drop water channel 4 branched from the downstream of the flow rate changing means 9. To be done. The entrance side of the main waterway 1 is branched from city water, while the branching point 30 of the drop waterway 4 of the main waterway 1 is connected to other taps such as a kitchen and a washroom.
【0010】そして主水路1には、入水温度を検知する
入水温度検知手段5、熱交換器2を流れる水量を検知す
る高温湯流量センサ6、熱交換器2、熱交換器2によっ
て加熱された湯温TK を検知する高温湯温度検知手段2
2、出湯温度を検知する混合湯温度検知手段10、が配
管されている他、落とし込み水路4の分岐点30以降に
水流スイッチ12が配管されている。尚温度検知手段は
いずれもサーミスタである。The main water passage 1 is heated by the incoming water temperature detecting means 5 for detecting the incoming water temperature, the hot water flow rate sensor 6 for detecting the amount of water flowing through the heat exchanger 2, the heat exchanger 2, and the heat exchanger 2. hot water temperature detector 2 for detecting the water temperature T K
2. In addition to piping 2, the mixed hot water temperature detecting means 10 for detecting the hot water temperature, a water flow switch 12 is provided after the branch point 30 of the drop water channel 4. The temperature detecting means are all thermistors.
【0011】またバイパス水路3の末端、すなわち主水
路1との接続部には流量可変手段9が配管されている。
流量可変手段9は、混合弁本体にステッピングモータ等
のアクチェータが結合されたものであり、ステッピング
モータの作動位置を調節することにより混合弁の開度を
調節する事ができ、バイパス水路3を流れる流量を可変
制御して主水路1を流れる高温湯と、バイパス水路3を
流れる水を適当な割合で混合し、必要とする温度の混合
出湯を得るものである。つまり、ステッピングモータの
開度を調節することにより、バイパス水路を流れる水の
流量も可変制御されるのである。A flow rate varying means 9 is provided at the end of the bypass water channel 3, that is, at the connection with the main water channel 1.
The flow rate varying means 9 has an actuator such as a stepping motor coupled to the main body of the mixing valve, and the opening of the mixing valve can be adjusted by adjusting the operating position of the stepping motor to flow through the bypass channel 3. The hot water flowing through the main water channel 1 and the water flowing through the bypass water channel 3 are mixed at an appropriate ratio by variably controlling the flow rate to obtain a mixed hot water at a required temperature. That is, the flow rate of the water flowing through the bypass channel is variably controlled by adjusting the opening degree of the stepping motor.
【0012】主水路1から分岐された落とし込み水路4
には、落とし込み流量センサ11が配管され、この落と
し込み流量センサ11によりより落とし込み流量が測定
される。Drop-in channel 4 branched from the main channel 1.
The drop flow rate sensor 11 is connected to the pipe, and the drop flow rate sensor 11 measures the drop flow rate.
【0013】熱交換器2はガスバーナより成る熱源器8
によって加熱される。また熱源器8のガス配管には、比
例弁からなる熱量調節手段7が設けられ、この熱量調節
手段7の開度を調整することによりガス量を制御してい
る。The heat exchanger 2 is a heat source device 8 composed of a gas burner.
Heated by. Further, the gas pipe of the heat source device 8 is provided with a heat quantity adjusting means 7 composed of a proportional valve, and the gas quantity is controlled by adjusting the opening degree of the heat quantity adjusting means 7.
【0014】14は前述の熱量調節手段等に信号を送っ
て動作させるコントローラであり、図中一点鎖線で示す
配線により熱源器等の制御装置とコントローラは接続さ
れている。またリモコン15を接続し、リモコン15に
は浴槽自動湯張りボタン16が配されており、このボタ
ン16を押すことにより浴槽への湯の落とし込みが開始
される。Reference numeral 14 denotes a controller which operates by sending a signal to the above-mentioned heat amount adjusting means and the like, and a controller such as a heat source device and the controller are connected by wiring shown by a chain line in the figure. Further, the remote controller 15 is connected, and the remote controller 15 is provided with a bathtub automatic hot water filling button 16. By pushing this button 16, hot water is dropped into the bathtub.
【0015】従来技術の風呂給湯装置では、市水からの
入水は主水路1を通り、加熱、混合されて温度調節がさ
れ、落とし込み水路4や他栓へ出湯される。そして従来
技術の風呂給湯装置では、主水路1の落とし込み水路4
の分岐点30以降に水流スイッチ12が配管されている
から、もし落とし込み水路4の分岐点30以降に水流が
有れば水流スイッチ12により検知される。In the prior art bath water heater, water from city water passes through the main water channel 1, is heated and mixed to be temperature-controlled, and is discharged to the drop channel 4 and other taps. And in the bath water heater of the prior art, the main water channel 1 drop channel 4
Since the water flow switch 12 is piped after the branch point 30 of the above, if there is a water flow after the branch point 30 of the drop channel 4, it is detected by the water flow switch 12.
【0016】すなわち図7の従来技術においては、浴槽
へ落とし込み中であっても水流スイッチ12の検出によ
り台所等の他栓へ給湯中であると判定できるのである。That is, in the prior art shown in FIG. 7, it is possible to determine that the hot water is being supplied to another tap of the kitchen or the like by detecting the water flow switch 12 even while it is being dropped into the bathtub.
【0017】また、他栓使用がなされているかどうかの
判定を行う他の方法としては熱交換器を流れる高温湯の
流量とバイパス水路を流れる水の流量の総流量を流量計
で測定し、また同時に風呂の落とし込み水路を流れる湯
の流量を測定して両者を比較するものがある。すなわち
総流量が落とし込み水路の流量に比べて多量である時に
他栓が使用されていると判断する。As another method for determining whether or not the other plug is used, the total flow rate of the hot water flowing through the heat exchanger and the water flowing through the bypass channel is measured with a flow meter, and At the same time, there is a method of measuring the flow rate of hot water flowing through a drop channel of a bath and comparing the two. That is, it is determined that the other plug is used when the total flow rate is higher than the flow rate in the drop channel.
【0018】図8は、流量計を用いて他栓使用の判定を
する従来技術の風呂給湯装置の構成図である。図8の風
呂給湯装置Cの構成は、水流スイッチ12を用いず、代
わってバイパス水路3を流れる水の流量を測定するバイ
パス流量センサ13が配されており、その他の構成は図
7の風呂給湯装置Bと同一である。図8の構成では高温
湯流量センサ6の検出値QK とバイパス流量センサ13
の検出値QB の合計値(QK +QB ) と落とし込み流量
センサ11の検出値QF との差がコントローラ14内で
算出される。そしてこの値が誤差値を考慮した一定少水
量(例えば3リットル/分)未満であれば、浴槽落とし
込み時における台所等の他栓使用はないものとみなし、
逆に一定少水量以上であれば他栓使用がされていると判
断する。FIG. 8 is a block diagram of a conventional bath water heater for determining whether another plug is used by using a flow meter. The bath water heater C of FIG. 8 does not use the water flow switch 12, but instead has a bypass flow rate sensor 13 for measuring the flow rate of the water flowing through the bypass water channel 3, and the other configurations are the bath water heater of FIG. 7. Same as device B. In the configuration of FIG. 8, the detected value Q K of the high temperature hot water flow sensor 6 and the bypass flow sensor 13
The controller 14 calculates the difference between the total value (Q K + Q B ) of the detected values Q B and the detected value Q F of the drop flow rate sensor 11. If this value is less than a certain small amount of water considering the error value (for example, 3 liters / minute), it is considered that there is no other plug used in the kitchen when the bath is dropped,
On the contrary, if the amount of water exceeds a certain level, it is judged that the other plug is used.
【0019】[0019]
【発明が解決しようとする課題】従来技術の風呂給湯装
置に採用される他栓使用の判定のための構成は、動作原
理が簡単であり正確な他栓使用の判定ができる。The structure for determining the use of the other plug used in the bath water heater of the prior art has a simple operation principle and can accurately determine the use of the other plug.
【0020】しかしながら、従来技術の風呂給湯装置で
は、流量センサや、総流量を測定するための特別の水量
検知センサを設けることが必須であり、部品点数が増加
する問題点があった。However, in the bath hot water supply apparatus of the prior art, it is essential to provide a flow rate sensor and a special water amount detection sensor for measuring the total flow rate, and there is a problem that the number of parts increases.
【0021】そこで、部品点数を増加させないために、
高温湯の流量を測定する高温湯流量検知手段の検知量
と、流量可変手段9の弁開度から演算して総流量を求
め、この演算値と風呂の落とし込み水路を流れる湯の流
量とを比較して、この値が一定値を越えた場合には他栓
の使用がされたと判断する構成の採用が試みられた。Therefore, in order not to increase the number of parts,
The total flow rate is calculated by calculating from the detected amount of the hot water flow rate detecting means for measuring the flow rate of the hot water and the valve opening of the flow rate varying means 9, and the calculated value is compared with the flow rate of the hot water flowing through the drop channel of the bath. Then, when this value exceeds a certain value, it was attempted to adopt a configuration in which it was judged that the other plug was used.
【0022】しかしこのような、高温湯の流量と流量可
変手段9の弁開度から総流量を求めて他栓の使用の判定
を行う構成は、判定の精度が低く実用性の乏しいもので
あった。However, such a configuration for determining the use of the other plug by obtaining the total flow rate from the flow rate of the high temperature hot water and the valve opening of the flow rate varying means 9 has a low determination accuracy and is not practical. It was
【0023】その他の問題点として、従来の風呂給湯装
置は、熱交換器の表面が錆びたり穴が開いたりし易い事
実があった。すなわち前述の従来技術の風呂給湯装置で
は熱交換器本体の温度については何ら対策がなされてい
なかった。例えば、夏期のように市水からの入水温度が
30℃近くある場合に、入浴に適した40℃の湯を得よ
うとして、入水温度を考慮に入れずにバイパス流量比を
決定してしまうと、バイパス水路の流量が少流量とな
り、高温湯の流量が大流量となる。そのため熱交換器本
体の温度が下がり、熱交換器本体の表面にドレン等の水
滴が付着し、熱交換器表面にサビや穴あき等の腐食を引
き起こすこととなる問題点があった。As another problem, the conventional bath water heater has a fact that the surface of the heat exchanger is easily rusted or punctured. That is, in the above-described conventional bath hot water supply device, no measures were taken for the temperature of the heat exchanger body. For example, when the temperature of the incoming water from city water is close to 30 ° C, such as in summer, when trying to obtain hot water of 40 ° C suitable for bathing, if the bypass flow rate ratio is decided without considering the incoming water temperature. The flow rate of the bypass channel becomes small and the flow rate of high temperature hot water becomes large. As a result, the temperature of the heat exchanger body is lowered, and water droplets such as drain adhere to the surface of the heat exchanger body, causing corrosion such as rust and perforation on the surface of the heat exchanger.
【0024】本発明は従来技術の上記した欠点に着目
し、水流センサや総流量を測定するための特別な流量セ
ンサを特に必要とせず、通常の風呂給湯器が具備する構
成部品のみで、他栓使用の判定が可能であり、かつ正確
な判定を行うことができる風呂給湯装置を提案する事を
目的とする。Focusing on the above-mentioned drawbacks of the prior art, the present invention does not require a water flow sensor or a special flow rate sensor for measuring the total flow rate, and only the components that a normal bath water heater has are provided. It is an object of the present invention to propose a bath water heater that can determine whether or not a plug has been used and can make an accurate determination.
【0025】また本発明は、熱交換器の表面に錆等が発
生することを防止し、寿命の永い風呂給湯器を提案する
事を目的とする。Another object of the present invention is to propose a bath water heater having a long life by preventing rust or the like from being generated on the surface of the heat exchanger.
【0026】そして更に加えて、上記目的を達成するた
めに新たに生じる可能性のある安全性に関する問題点に
も検討を加え、不意に高温の湯が出湯されることを防止
して安心して使用できる風呂給湯器を提案する事を目的
とする。Furthermore, in addition to the above problems, safety problems that may newly arise in order to achieve the above-mentioned object are also examined to prevent the hot water from coming out unexpectedly and to be used with confidence. The purpose is to propose a bath water heater that can be used.
【0027】[0027]
【発明が解決しようとする課題】前記したように、高温
湯の流量と流量可変手段9の弁開度から総流量を求めて
他栓の使用の判定を行う構成は、判定の精度が低く実用
性の乏しいものであったが、この原因について、本発明
者らがさらに検討をした結果、主たる原因は次の通りで
あることが判明した。As described above, the configuration for determining the use of the other plug by obtaining the total flow rate from the flow rate of the high temperature hot water and the valve opening of the flow rate varying means 9 has a low determination accuracy and is practically used. However, as a result of further investigations by the present inventors regarding this cause, it was found that the main causes are as follows.
【0028】すなわち、バイパスミキシング方式の風呂
給湯器は混合出湯の温度を落とし込み設定温度と一致さ
せるため、流量可変手段9の弁開度が絶え間なく変化す
る。そのため、各瞬間の流量可変手段9の湯水混合比と
実際の出湯量とは大幅な差異があり、その結果他栓使用
の判定に誤りが出るものであった。In other words, in the bath water heater of the bypass mixing system, the temperature of the mixed hot water is dropped to match the set temperature, so that the valve opening of the flow rate changing means 9 constantly changes. For this reason, there is a large difference between the hot and cold water mixing ratio of the flow rate varying means 9 and the actual amount of hot water discharged at each moment, and as a result, the determination of the use of the other plug is erroneous.
【0029】この知見に基づき完成された本発明の風呂
給湯装置は、熱交換器を備えた主水路と、熱交換器と並
列に接続されたバイパス水路と、バイパス水路を流れる
水と熱交換器から出湯される高温湯を混合する湯水混合
部と、主水路から分岐された落とし込み水路と、バイパ
ス水路を流れる水と高温湯の混合比率を調節する流量可
変手段と、熱交換器を加熱する熱源器と、混合湯の温度
が出湯を希望する設定温度に等しくなるように流量可変
手段を制御する混合比率制御手段とを備えた風呂給湯装
置において、高温湯の流量あるいはバイパス水路を流れ
る水の流量を検知する混合前流量検知手段と、落とし込
み水路を流れる水量を検知する落とし込み水量検知手段
とを有し、所定の混合比率で流量可変手段を一旦固定
し、混合前流量検知手段の検出値および流量可変手段の
混合比率により算出される混合出湯の総流量と落とし込
み水量検知手段の検出値とを比較し、両者の差が一定量
以上であれば流量可変手段の混合比率の固定を解除する
他栓割り込み制御手段を有することを特徴とするもので
ある。The bath hot water supply apparatus of the present invention completed based on this finding is a main water channel having a heat exchanger, a bypass channel connected in parallel with the heat exchanger, water flowing through the bypass channel and the heat exchanger. Water mixing section for mixing high-temperature hot water discharged from the main water channel, a drop channel branched from the main channel, a flow rate changing means for adjusting the mixing ratio of water flowing through the bypass channel and the high-temperature hot water, and a heat source for heating the heat exchanger. In a bath water heater equipped with a water heater and a mixing ratio control means for controlling the flow rate varying means so that the temperature of the mixed hot water becomes equal to the desired set temperature for tapping hot water, the flow rate of high-temperature hot water or the flow rate of water flowing through the bypass channel. It has a pre-mixing flow rate detecting means for detecting the flow rate and a drop water amount detecting means for detecting the amount of water flowing through the drop water channel, and the flow rate varying means is temporarily fixed at a predetermined mixing ratio to detect the pre-mixing flow rate. The total flow rate of the mixed hot water calculated by the detection value of the stage and the mixing ratio of the flow rate varying means is compared with the detection value of the drop water amount detecting means. It is characterized in that it has another plug interrupt control means for releasing the fixation.
【0030】流量可変手段を固定する際の混合比率はた
だ一種類だけでも十分であるが、熱交換器の表面に水滴
が発生することを防止するためには、予め数種類の混合
比率を設定しておき、各種の状況に合わせて選択する構
成が望ましい。Although only one kind of mixing ratio is sufficient for fixing the flow rate varying means, several kinds of mixing ratios are preset in order to prevent water droplets from being generated on the surface of the heat exchanger. It is desirable that the configuration be selected according to various situations.
【0031】この様な観点から完成された本発明の特徴
は、流量可変手段の混合比率が予め複数設定されてお
り、熱交換器あるいはバイパス水路に入水される入水温
度、落とし込み設定温度、前記入水温度と落とし込み設
定温度の差のいずれかに基づいて流量可変手段の混合比
率が選択され、この選択された混合比率によって流量可
変手段が一旦固定される制御手段を有することを特徴と
する請求項1記載の風呂給湯装置である。A feature of the present invention completed from such a point of view is that a plurality of mixing ratios of the flow rate varying means are set in advance, the temperature of incoming water entering the heat exchanger or the bypass water channel, the preset temperature of dropping, The mixing ratio of the flow rate varying means is selected on the basis of either the difference between the water temperature and the drop set temperature, and the flow rate varying means is temporarily fixed according to the selected mixing ratio. The bath water heater according to 1.
【0032】また、同様に熱交換器の表面に水滴が発生
することを防止するとともに、上記した発明をより発展
させた発明の特徴は、湯水混合部から出湯される混合湯
の温度を検知する混合湯温度検知手段と、熱源器の発熱
量を調節する熱量調節手段と、高温湯の温度を検出する
高温湯温度検知手段とを有し、混合前流量検知手段の検
出値および流量可変手段の混合比率により算出される混
合出湯の総流量と落とし込み水量検知手段の検出値との
差が一定量未満であれば、湯水混合部から出湯される混
合湯の温度が落とし込み設定温度に等しくなるように熱
源器の発熱量を調節し、前記混合出湯の総流量と落とし
込み水量検知手段の検出値との差が一定量以上の場合は
流量可変手段の混合比率の固定を解除するとともに高温
湯の温度が所定の高温湯設定温度となるように熱源器の
発熱量を調節する制御手段を有することを特徴とする請
求項1または2のいずれかに記載の風呂給湯装置であ
る。Similarly, water droplets are prevented from being generated on the surface of the heat exchanger, and a feature of the invention which is a further development of the above invention is that the temperature of the mixed hot water discharged from the hot water mixing section is detected. It has a mixed hot water temperature detecting means, a heat quantity adjusting means for adjusting the heat generation amount of the heat source device, and a high temperature hot water temperature detecting means for detecting the temperature of the high temperature hot water. If the difference between the total flow rate of the mixed hot water calculated by the mixing ratio and the detection value of the drop water amount detecting means is less than a certain amount, the temperature of the mixed hot water discharged from the hot and cold water mixing unit is made equal to the drop set temperature. If the difference between the total flow rate of the mixed hot water and the detection value of the dropped water amount detection means is a certain amount or more, the mixing ratio of the flow rate varying means is released and the temperature of the hot water is adjusted. Predetermined A bath water heater according to claim 1 or 2, wherein the control means for adjusting the heating value of the heat source unit so that the hot water set temperature.
【0033】さらに、上記した発明の安全性を改善する
ための発明は、流量可変手段の混合比率の固定は、落と
し込み給湯指令の後、一定時間経過後に行われる事を特
徴とする請求項1乃至3のいずれかに記載の風呂給湯装
置である。Further, in the invention for improving the safety of the above-mentioned invention, the mixing ratio of the flow rate varying means is fixed after a lapse of a fixed time after the drop hot water supply command. The bath water heater according to any one of 3 above.
【0034】また同様の目的を達成するための他の発明
は、高温湯の温度を検出する高温湯温度検知手段と、高
温湯の温度が所定の高温湯設定温度となるように調節す
る制御手段を有し、落とし込み給湯指令の後、高温湯温
度検知手段により検知された温度と高温湯設定温度とを
比較し両者の差が一定温度以内であれば流量可変手段の
混合比率を固定する制御手段を有することを特徴とする
請求項1乃至4のいずれかに記載の風呂給湯装置であ
る。Another invention for achieving the same object is a hot water temperature detecting means for detecting the temperature of the hot water, and a control means for adjusting the temperature of the hot water to a predetermined hot water set temperature. And a control means for fixing the mixing ratio of the flow rate varying means if the temperature detected by the high-temperature hot-water temperature detecting means and the high-temperature hot-water set temperature are compared after the drop-in hot water supply command, and the difference between them is within a certain temperature. The bath water heater according to any one of claims 1 to 4, further comprising:
【0035】[0035]
【作用】本発明の風呂給湯装置は、基本的にバイパスミ
キシング方式を採用するものであり、熱交換器を備えた
主水路と、熱交換器と並列に接続されたバイパス水路と
を有し、バイパス水路を流れる常温水と熱交換器を通る
高温湯が湯水混合部で混合することができる。また混合
比率制御手段によって、混合湯の温度が出湯を希望する
設定温度に等しくなるように流量可変手段が調節され
る。従って従来技術の風呂給湯装置と同様に台所等の他
栓を開くと希望する設定温度の湯が出湯される。The bath water heater of the present invention basically adopts the bypass mixing system, and has a main water channel having a heat exchanger and a bypass water channel connected in parallel with the heat exchanger, The room temperature water flowing through the bypass channel and the hot water passing through the heat exchanger can be mixed in the hot water mixing section. Further, the mixing ratio control means adjusts the flow rate varying means so that the temperature of the mixed hot water becomes equal to the desired set temperature at which hot water is discharged. Therefore, similar to the bath water heater of the prior art, when the other tap of the kitchen or the like is opened, hot water of a desired set temperature is discharged.
【0036】本発明の風呂給湯装置は、風呂へ湯を落と
し込む際、所定の混合比率の状態で流量可変手段が一旦
固定される。そのためこの状態のときでは高温湯の流量
とバイパス水路を流れる水量の割合は全く変化しない。
またこの混合割合の具体的な数値は、予め制御装置内に
記憶しておく。そしてこの混合比率と、混合前流量検知
手段が検知する高温湯の流量あるいはバイパス水路を流
れる水量から混合出湯の総流量を演算する。この演算さ
れた混合出湯の総流量は、前記したように高温湯の流量
とバイパス水路を流れる水量の割合が全く変化しない状
態での混合割合の具体的な数値に基づくものであるから
信頼性が高い。In the bath water heater of the present invention, when the hot water is dropped into the bath, the flow rate varying means is temporarily fixed in a state of a predetermined mixing ratio. Therefore, in this state, the ratio between the flow rate of hot water and the amount of water flowing through the bypass channel does not change at all.
The specific numerical value of the mixing ratio is stored in advance in the control device. Then, the total flow rate of the mixed hot water is calculated from the mixing ratio and the flow rate of the hot water detected by the pre-mixing flow rate detection means or the amount of water flowing through the bypass water channel. Since the calculated total flow rate of the mixed hot water is based on the concrete numerical value of the mixing rate in the state where the flow rate of the high temperature hot water and the rate of the amount of water flowing through the bypass channel do not change at all as described above, the reliability is high. high.
【0037】そして、この混合出湯の総流量と落とし込
み水量検知手段の検出値とを比較し、両者の差が一定量
以上であれば、落とし込みされている出湯以外に、何処
かの栓が開放されて出湯されていることが確実であるか
ら、他栓使用がなされている判定ができる。また逆に両
者の差が一定量以下であれば、現在使用されているのは
落とし込み水路へ湯を給湯する栓だけであるから、他栓
使用がなされていないと判定できる。Then, the total flow rate of the mixed hot water is compared with the detection value of the dropped water amount detecting means, and if the difference between the two is more than a certain amount, some plugs are opened in addition to the dropped hot water. Since it is certain that the tap has been tapped, it can be determined that the other tap is used. On the other hand, if the difference between the two is less than a certain amount, it can be determined that the other plug is not used because only the plug for supplying hot water to the drop channel is currently used.
【0038】尚、他栓使用がなされていない場合は、理
論的には混合出湯の総流量と、落とし込み水量検知手段
の検出値は等しくなるはずであるが、本発明は演算によ
り総流量を求める以上、ある程度の誤差が生じる事は避
けられない。そこで両者の差が一定量以上であるばあい
に他栓使用がなされていると判断している。When the other plug is not used, theoretically the total flow rate of the mixed hot water should be equal to the detection value of the drop water amount detecting means, but in the present invention, the total flow rate is calculated. As mentioned above, it is unavoidable that some errors occur. Therefore, if the difference between the two is more than a certain amount, it is judged that the other plug is used.
【0039】他栓使用がされていることが判明すれば、
流量可変手段の混合比率の固定を解除し、機器の条件や
使用条件に合わせた具体的な対応を行う。尚本発明で混
合前流量検知手段は通常高温湯の流量を検知するものが
利用されるが、配管回路によってはバイパス水路を流れ
る水の流量を検知するものを利用しても差し支えない。If it is found that the other plug is used,
The fixation of the mixing ratio of the flow rate varying means is released, and specific measures are taken according to the conditions of the equipment and the usage conditions. In the present invention, as the pre-mixing flow rate detecting means, a means for detecting the flow rate of high-temperature hot water is usually used, but a means for detecting the flow rate of water flowing through the bypass water channel may be used depending on the piping circuit.
【0040】流量可変手段の固定は、前記したように湯
水の混合割合を安定させて総流量の演算の信頼性を向上
させることが目的であるから、どのような混合割合でも
可能であるが、少なくとも流量を検知する間はこの混合
割合で風呂への落とし込みがなされるので、この間に熱
交換器の表面に水滴が発生しない範囲であることが好ま
しい。Since the purpose of fixing the flow rate varying means is to stabilize the mixing ratio of hot and cold water and improve the reliability of the calculation of the total flow rate as described above, any mixing ratio is possible. Since the water is dropped into the bath at this mixing ratio at least while the flow rate is being detected, it is preferable that water drops are not generated on the surface of the heat exchanger during this period.
【0041】熱交換器の表面での水滴の発生は、熱交換
器表面の温度が低いときに発生する。従って、熱交換器
の表面での水滴が発生するかどうかは、熱交換器から出
湯される高温湯の温度の高低に左右される。本発明者等
の調査では、具体的には、高温湯の温度が50℃以下の
場合に熱交換器の表面に水滴が発生することが判明して
いる。また高温湯の温度が80℃を越えると、高温湯が
熱交換器内で沸騰するおそれがあり好ましくない。The generation of water droplets on the surface of the heat exchanger occurs when the temperature of the surface of the heat exchanger is low. Therefore, whether or not water drops are generated on the surface of the heat exchanger depends on the temperature of the hot water discharged from the heat exchanger. The investigation conducted by the present inventors has revealed that specifically, when the temperature of the high-temperature hot water is 50 ° C. or lower, water droplets are generated on the surface of the heat exchanger. If the temperature of the hot water exceeds 80 ° C, the hot water may boil in the heat exchanger, which is not preferable.
【0042】そして、高温湯の温度の高低に最も大きな
影響を与えるのは、バイパス水路に入水される入水温度
と落とし込み設定温度との差であることが経験的に判っ
ている。また、より簡便にはバイパス水路に入水される
入水温度単独や、落とし込み設定温度単独でも大まかな
高温湯の温度範囲は限定可能である事が判っている。It has been empirically known that it is the difference between the incoming water temperature entering the bypass water channel and the drop set temperature that has the greatest effect on the temperature of the hot water. Further, it has been found that the temperature range of the high-temperature hot water can be roughly limited by simply using the inlet water temperature to enter the bypass channel or the drop setting temperature alone.
【0043】請求項2の発明は、以上の知見に基づくも
ので、流量可変手段を固定するときの混合比率が予め複
数設定されている。すなわち、高温湯の割合が多い場合
と、少ない場合が決められている。この混合比率は、例
えばある範囲の入水温度の場合に高温湯の温度が50℃
から80℃内になる範囲が実験により求められて制御装
置内に記憶されたものである。The invention of claim 2 is based on the above knowledge, and a plurality of mixing ratios when the flow rate varying means is fixed are preset. That is, the case where the proportion of high-temperature hot water is high and the case where it is low are determined. This mixing ratio is, for example, when the temperature of the hot water is 50 ° C. when the water temperature is in a certain range.
The range from 80 ° C. to 80 ° C. is obtained by experiment and stored in the control device.
【0044】そして請求項2の発明では、最初に例えば
入水温度が検知され、制御装置内に記憶された複数の混
合比率の内から、当該入水温度で高温湯の温度が50℃
から80℃の範囲になる比率が選択される。そしてこの
選択された混合比率で流量可変手段の混合比率が固定さ
れる。流量可変手段の混合比率が固定されている間も風
呂への落とし込みは続けられ、熱交換器内には加熱され
る水が通過するが、少なくとも熱交換器の表面温度は、
水滴が発生しない温度以上に維持され続ける。In the second aspect of the invention, first, for example, the incoming water temperature is detected, and the temperature of the hot water is 50 ° C. at the incoming water temperature from a plurality of mixing ratios stored in the control device.
A ratio in the range from to 80 ° C is selected. Then, the mixing ratio of the flow rate varying means is fixed at the selected mixing ratio. While the mixing ratio of the flow rate varying means is fixed, the water is continuously dropped into the bath and the heated water passes through the heat exchanger, but at least the surface temperature of the heat exchanger is
Continue to maintain the temperature above the temperature at which water drops do not occur.
【0045】請求項3の発明では、前記した混合前流量
検知手段の検出値および流量可変手段の混合比率により
算出される混合出湯の総流量と、落とし込み水量検知手
段の検出値との差が一定量未満であれば、他栓使用がな
いと判断する。請求項3の発明において、他栓使用がな
いと判断された場合は、流量可変手段の混合比率の固定
をそのまま維持した状態で浴槽への落とし込みを続行す
る。According to the third aspect of the present invention, the difference between the total flow rate of the mixed tap water calculated by the detection value of the pre-mixing flow rate detecting means and the mixing ratio of the flow rate varying means and the detection value of the drop water amount detecting means is constant. If it is less than the amount, it is judged that no other plug is used. In the invention of claim 3, when it is judged that the other plug is not used, the dropping into the bath is continued while the fixed mixing ratio of the flow rate varying means is maintained as it is.
【0046】すなわち、混合湯温度検知手段により検知
される混合湯の温度と、使用者が希望する落とし込み設
定温度とを比較し、両者が等しくなるように熱源器の発
熱量を調節する。すると高温湯とバイパス水路を流れる
水との混合割合は変化しないが、高温湯の温度が落とし
込み設定温度と実際の混合出湯の温度に応じて変化し、
希望する落とし込み設定温度の湯が浴槽に落とし込まれ
る。That is, the temperature of the mixed hot water detected by the mixed hot water temperature detecting means is compared with the drop set temperature desired by the user, and the heat generation amount of the heat source device is adjusted so that both are equal. Then, the mixing ratio of the high-temperature hot water and the water flowing through the bypass channel does not change, but the temperature of the high-temperature hot water drops depending on the set temperature and the actual temperature of the mixed hot water,
Hot water at the desired dropping temperature is dropped into the bathtub.
【0047】また逆に、混合出湯の総流量と落とし込み
水量検知手段の検出値との差が一定量以上であれば、他
栓使用がされていると判断する。そして続いて流量可変
手段の混合比率の固定を解除する。混合比率の固定の解
除後は流量可変手段の混合比率は、湯水混合部から出湯
される混合湯の温度が使用者が希望する出湯温度と一致
するように自動調節される。On the contrary, if the difference between the total flow rate of the mixed hot water and the detection value of the dropped water amount detecting means is a certain amount or more, it is determined that the other plug is used. Then, subsequently, the fixation of the mixing ratio of the flow rate varying means is released. After the fixed mixing ratio is released, the mixing ratio of the flow rate varying means is automatically adjusted so that the temperature of the mixed hot water discharged from the hot water mixing unit matches the hot water temperature desired by the user.
【0048】加えて、高温湯の温度が所定の温度となる
ように熱源器の発熱量が調節され、高温湯の温度は安定
する。従って出湯の温度の変化は流量可変手段の混合比
率のみによって決まり、混合後の出湯温度は安定する。In addition, the calorific value of the heat source device is adjusted so that the temperature of the hot water becomes a predetermined temperature, and the temperature of the hot water becomes stable. Therefore, the change in the temperature of tapping water is determined only by the mixing ratio of the flow rate varying means, and the tapping temperature after mixing is stable.
【0049】尚請求項3の発明において、他栓の使用が
判明した後の出湯温度は、前記した落とし込み設定温度
とする構成も可能であるが、一般的には他栓、即ち台所
等の給湯を優先する事が多いため、台所等の他栓に出湯
させたい設定温度に統一する事が望ましい。またこの
時、他栓に出湯を希望する設定温度の湯を、浴槽にも同
時に落とし込む構成も可能であるが、多くの場合は、浴
槽への落とし込みは一時中断される。In the third aspect of the invention, the tap water temperature after the use of the other plug is found to be the above-mentioned dropping set temperature, but in general, the other plug, that is, hot water supply for kitchen etc. Since it is often prioritized, it is desirable to standardize the set temperature at which you want to tap hot water from other taps in the kitchen. At this time, it is possible to simultaneously drop hot water having a set temperature desired to be tapped into the other tap into the bathtub, but in many cases, the drop into the bathtub is temporarily suspended.
【0050】請求項4の発明は、請求項1乃至3の発明
を更に改良し、これらの発明の安全性を高めるものであ
る。The invention of claim 4 further improves the inventions of claims 1 to 3 and enhances the safety of these inventions.
【0051】すなわち、請求項1乃至3の発明による
と、浴槽への落とし込みを開始する信号が入力されたと
き、前記したように所定の混合比率で流量可変手段が固
定される。ところがもし、先に台所等の他栓が使用がさ
れており、それからしばらくの時間の後に、流量可変手
段が固定された場合を想定すると、時によって思いもか
けない温度の湯が浴槽へ落とし込まれることがある。That is, according to the first to third aspects of the invention, when the signal for starting dropping into the bath is input, the flow rate varying means is fixed at a predetermined mixing ratio as described above. However, if it is assumed that another plug such as a kitchen is being used first and then the flow rate varying means is fixed after a while, hot water with an unexpected temperature will drop into the bathtub from time to time. May be
【0052】具体的に説明すると、先に他栓が使用され
ていた時は、本発明の風呂給湯装置は、通常のバイパス
ミキシング方式により作動しており、通常は高温湯の温
度は一定以内の温度となるように何らかの制御がされて
いる。ところが、他栓の使用をおえて熱交換器内の水流
を停止すると、熱交換器内に滞留した湯が、熱交換器の
余熱によって後沸され、非常に高い温度になっているこ
とがある。More specifically, when the other plug was previously used, the bath water heater of the present invention operates by a normal bypass mixing system, and the temperature of the hot water is usually within a certain range. Some kind of control is performed so that the temperature is reached. However, when the water flow in the heat exchanger is stopped by using the other plug, the hot water staying in the heat exchanger may be post-boiling due to the residual heat of the heat exchanger, resulting in a very high temperature. .
【0053】ところがこのように高温湯の温度が相当に
高い温度の時に、浴槽への落とし込みを開始する信号が
入力されて、所定の混合比率で流量可変手段が固定さ
れ、さらにその固定された混合比率が高温湯の比率が高
いものであった場合浴槽への落とし込み当初に高温湯が
高い比率で出湯され、非常に熱い湯が出てくるおそれが
ある。However, when the temperature of the hot water is considerably high as described above, a signal for starting dropping into the bath is input, the flow rate varying means is fixed at a predetermined mixing ratio, and the fixed mixing is performed. When the ratio of the high-temperature hot water is high, the high-temperature hot water is discharged at a high ratio at the beginning when it is dropped into the bathtub, and there is a risk that very hot water will come out.
【0054】請求項4の発明では、落とし込み給湯指令
があると、最初に通常のバイパスミクキシング方式によ
って流量可変手段の混合比率が制御される。従って、た
とえ高温湯の温度が相当に高くなっていても、バイパス
水路を流れる水の量を増加することによって落とし込ま
れる湯の温度はある程度安定したものとなる。According to the fourth aspect of the invention, when the drop hot water supply command is issued, first, the mixing ratio of the flow rate varying means is controlled by the normal bypass mixing method. Therefore, even if the temperature of the hot water is considerably high, the temperature of the hot water dropped by increasing the amount of water flowing through the bypass can be stabilized to some extent.
【0055】また流量可変手段の混合比率を調整しつつ
給湯している間に、熱交換器の中に滞留していた高温の
湯の多くは入れ代わる。流量可変手段の混合比率の固定
は、落とし込み給湯指令の後、一定時間経過後に行われ
るので、混合比率の固定をおこなった時には既に熱交換
器の中の高温の湯の多くは入れ代わってしまっている。
そのため、落とし込み初期に熱い湯が出湯される事は未
然に防止される。Further, while hot water is being supplied while adjusting the mixing ratio of the flow rate varying means, most of the high temperature hot water staying in the heat exchanger is replaced. Since the mixing ratio of the flow rate varying means is fixed after a certain period of time has passed after the drop hot water supply command, most of the hot water in the heat exchanger has already been replaced when the mixing ratio was fixed. There is.
Therefore, it is possible to prevent hot water from being discharged at the beginning of dropping.
【0056】請求項5の発明では、落とし込み給湯指令
が有れば、落とし込み給湯側の弁を開く前に現実の高温
湯温度と高温湯設定温度が比較される。そして両者の差
が一定温度以内であれば、例え高温湯が高い比率で出湯
されても危険がないので、流量可変手段の混合比率を固
定し、他栓使用の判定を開始する。According to the fifth aspect of the present invention, if there is a drop hot water supply command, the actual hot water temperature is compared with the actual hot water set temperature before opening the drop hot water supply side valve. If the difference between the two is within a certain temperature, there is no danger even if hot water is discharged at a high ratio, so the mixing ratio of the flow rate varying means is fixed and the determination of the use of the other plug is started.
【0057】[0057]
【実施例】以下さらに本発明の具体的実施例について説
明する。尚従来技術と同一の部材に付いては同一の番号
を付してその説明を省略する。EXAMPLES Specific examples of the present invention will be described below. The same members as those of the conventional technique are designated by the same reference numerals and the description thereof will be omitted.
【0058】図1は、本発明の風呂給湯装置の構成図で
ある。図2は、流量可変手段の開度と実際の湯水の混合
比率の関係を示すグラフである。図3は、請求項1記載
の発明の風呂給湯装置のフローチャートである。FIG. 1 is a block diagram of a bath water heater according to the present invention. FIG. 2 is a graph showing the relationship between the opening degree of the flow rate varying means and the actual mixing ratio of hot and cold water. FIG. 3 is a flowchart of the bath water heater according to the first aspect of the invention.
【0059】図1において、Aは本発明の風呂給湯装置
を示す。図1の風呂給湯装置Aの配管系統は、図7によ
って説明した従来技術の風呂装置Bの構成と概ね同一で
ある。ただ図7の風呂装置Bは、水流スイッチ12が設
けられていたのに対して、風呂給湯装置Aには、この水
流スイッチに相当する部材が無い。In FIG. 1, A indicates a bath water heater according to the present invention. The piping system of the bath water heater A of FIG. 1 is almost the same as the configuration of the bath device B of the prior art described with reference to FIG. 7. However, while the bath device B of FIG. 7 is provided with the water flow switch 12, the bath water heater A does not have a member corresponding to this water flow switch.
【0060】コントローラ31は、発熱量フィードフォ
ワード(以下FFという)制御部17と、発熱量フィー
ドバック(以下、FBという)制御部18と、混合比率
FB制御部19、混合弁開度設定部20、給湯温度設定
器21とから構成されており、全体として他栓割り込み
制御手段として機能する。The controller 31 includes a heat generation amount feedforward (hereinafter referred to as FF) control unit 17, a heat generation amount feedback (hereinafter referred to as FB) control unit 18, a mixing ratio FB control unit 19, a mixing valve opening degree setting unit 20, It is composed of a hot water supply temperature setting device 21 and functions as the other plug interrupt control means as a whole.
【0061】発熱量FF制御部17には入水温度検知手
段5の検出値TC が入力される。そして送られた検出値
TC をもとにして、高温湯の温度が80℃になるのに必
要な熱量調節手段7の開度を演算し、熱量調節手段7を
開閉して、熱源器8に供給されるガス量を調節制御する
ものである。The detected value T C of the incoming water temperature detecting means 5 is input to the heat generation amount FF control unit 17. Then, based on the detected value T C sent, the opening degree of the heat quantity adjusting means 7 required for the temperature of the high-temperature hot water to reach 80 ° C. is calculated, and the heat quantity adjusting means 7 is opened / closed to generate the heat source device 8 It regulates and controls the amount of gas supplied to.
【0062】発熱量FB制御部18には、高温湯温度検
知手段22によって検知される高温湯の温度検出値TK
と、混合湯温度検知手段10によって検知される湯水混
合後の湯の温度の検出値TH と、落とし込み流量センサ
11によって検知される落とし込み水路の流量の検出値
QF がそれぞれ入力される。そして、これらの検出値を
選択的に使用して熱量調節手段7の開度を調整して熱源
器8に供給されるガス量をを制御するものである。The calorific value FB control unit 18 has a high temperature hot water temperature detection value T K detected by the high temperature hot water temperature detection means 22.
When a detection value T H of the temperature of the hot water after the hot and cold water mixing that is detected by the mixed water temperature detecting means 10, the detection value Q F of the flow rate of darken waterway is detected by the flow sensor 11 darken are input. Then, the detected values are selectively used to adjust the opening degree of the heat amount adjusting means 7 to control the amount of gas supplied to the heat source device 8.
【0063】混合比率FB制御部19は、発熱量FF制
御部17及び発熱量FB制御部18と一体をなし、前述
の混合湯温度検知手段10、流量センサ11の各データ
が一括して入力される。そして混合比率FB制御部19
は、混合湯温度検知手段10の信号を流量可変手段9に
フィードバックするもので、混合比率FB制御部19の
出力は流量可変手段9を構成するステッピングモータに
接続され、流量可変手段9の開度θを調節することがで
きる。また、混合比率FB制御部19は給湯温度設定器
21と接続されており、各温度検知手段や流量センサの
信号は、混合比率FB制御部19を経て給湯温度設定器
21に入力される。The mixing ratio FB control unit 19 is integrated with the heat generation amount FF control unit 17 and the heat generation amount FB control unit 18, and the respective data of the mixed hot water temperature detecting means 10 and the flow rate sensor 11 are collectively inputted. It Then, the mixing ratio FB control unit 19
Is for feeding back the signal of the mixed hot water temperature detecting means 10 to the flow rate varying means 9, the output of the mixing ratio FB control section 19 is connected to a stepping motor constituting the flow rate varying means 9, and the opening degree of the flow rate varying means 9 is θ can be adjusted. Further, the mixing ratio FB control unit 19 is connected to the hot water supply temperature setting device 21, and the signals of the temperature detecting means and the flow rate sensor are input to the hot water supply temperature setting device 21 via the mixing ratio FB control unit 19.
【0064】給湯温度設定器21は、熱交換器2の出口
側、すなわち高温湯の設定温度TKSと流量可変手段9か
ら出湯される混合後の湯の設定温度を設定可能としてお
り、混合弁開度設定部20に接続されている。なお本実
施例では流量可変手段9から出湯される混合湯の設定温
度には、落とし込み設定温度THSと、台所等の他栓への
出湯を希望する湯の設定温度TTSの2種類が設定され
る。そして2種類の設定温度は給湯温度設定器21内で
自動的に切り換えられる。The hot water supply temperature setting device 21 is capable of setting the set temperature of the outlet side of the heat exchanger 2, that is, the set temperature T KS of high temperature hot water and the hot water after mixing discharged from the flow rate varying means 9, and the mixing valve. It is connected to the opening degree setting unit 20. Note that the set temperature of the mixed hot water is tapped from the flow rate changing means 9 in this embodiment includes a darken the set temperature T HS, 2 kinds of set temperature T TS of the hot water to the desired hot water to other plug of the kitchen or the like is set To be done. Then, the two kinds of set temperatures are automatically switched in the hot water supply temperature setting device 21.
【0065】混合弁開度設定部20においては、混合比
率FB制御部19に送られた入水温TC と、給湯温度設
定器21で設定された落とし込み設定温度THSの偏差に
より流量可変手段9の開度θを選択し、この開度になる
ようにステッピングモータを調節するのである。混合弁
開度設定部20は、発熱量FB制御部18に接続されて
おり、両者が関連して動作することにより、高温湯の温
度TK を一定範囲(例えば50℃から80℃の範囲)に
制御可能とすると共に、流量可変手段9から出湯される
湯の温度TH の制御を可能としている。[0065] In the mixing valve opening setting unit 20, the mixing ratio FB control section 19 to the sent input temperature T C, darken set by the hot water temperature setting unit 21 sets the temperature T HS of the deviation by the flow rate varying means 9 The opening degree θ of is selected, and the stepping motor is adjusted so that this opening degree is obtained. The mixing valve opening degree setting unit 20 is connected to the calorific value FB control unit 18, and operates in association with each other to keep the temperature T K of the high-temperature hot water in a certain range (for example, in the range of 50 ° C. to 80 ° C.). It is possible to control the temperature T H of the hot water discharged from the flow rate changing means 9 while controlling the temperature.
【0066】図2は、流量可変手段9の開度と実際の湯
水の混合比率の関係を示すグラフである。グラフの横軸
は流量可変手段9の開度であり、この開度は混合弁を開
閉するステッピングモータのステップ数により正確に知
ることができる。縦軸は、高温湯とバイパス水路を流れ
る水を混合した後の流量可変手段9から出湯される総流
量であり、高温湯流量センサ6で検出される高温湯の流
量を1とした比率で表示されている。流量可変手段9の
開度θは、本発明の場合は0°から315°の間が可能
であり、0°においてはバイパス水路3を流れる流量は
最大であり、315°においてはバイパス路3を流れる
流量は最小である。FIG. 2 is a graph showing the relationship between the opening of the flow rate varying means 9 and the actual mixing ratio of hot and cold water. The horizontal axis of the graph is the opening of the flow rate varying means 9, and this opening can be accurately known by the number of steps of the stepping motor that opens and closes the mixing valve. The vertical axis represents the total flow rate of hot water discharged from the flow rate varying means 9 after mixing the high-temperature hot water and the water flowing through the bypass water channel, and is expressed as a ratio with the flow rate of the high-temperature hot water detected by the high-temperature hot water flow sensor 6 as 1. Has been done. In the case of the present invention, the opening degree θ of the flow rate varying means 9 can be between 0 ° and 315 °. At 0 °, the flow rate flowing through the bypass water channel 3 is the maximum, and at 315 °, the bypass channel 3 is opened. Flow rate is minimal.
【0067】図2において示した第1ポジションと第2
ポジションは、それぞれ流量可変手段9の開度、すなわ
ち高温湯とバイパス路を流れる水の混合比が異なる位置
であり、入水温度や設定温度に応じて選択されるもので
ある。The first position and the second position shown in FIG.
The position is a position where the opening degree of the flow rate varying means 9, that is, the mixing ratio of the high-temperature hot water and the water flowing through the bypass passage is different, and is selected according to the incoming water temperature and the set temperature.
【0068】すなわち、浴槽あるいは台所に一定温度の
湯を出湯させるためには、高温湯とバイパス水路を流れ
る水の混合比を変化させる方法と、ガス量を変化させて
高温湯の温度自体を変化させる方法がある。ここで一定
温度の湯を出湯させるために、バイパス流量を大流量に
すればする程熱交換器2を更に加熱して高温湯の温度を
上昇させる必要があるのは熱量保存則より明白である
が、一定限度を越えると高温湯が沸騰してしまう問題が
ある。逆にバイパス流量を下げれば下げる程加熱する熱
交換器2出口側温度、すなわち高温湯の温度TK は下が
り、一定温度以下になると、熱交換器2の本体温度が過
度に低下して、熱交換器2にドレン等の水滴が付着する
心配がある。That is, in order to discharge hot water at a constant temperature into the bathtub or the kitchen, a method of changing the mixing ratio of the high temperature hot water and the water flowing through the bypass water channel, and changing the gas amount to change the temperature itself of the high temperature hot water. There is a way to do it. In order to discharge hot water having a constant temperature, it is clear from the heat quantity conservation law that the larger the bypass flow rate, the more the heat exchanger 2 must be heated to raise the temperature of the hot water. However, if it exceeds a certain limit, there is a problem that high temperature hot water boils. On the contrary, as the bypass flow rate is lowered, the temperature at the outlet side of the heat exchanger 2 for heating, that is, the temperature T K of the hot water drops, and when the temperature falls below a certain temperature, the temperature of the main body of the heat exchanger 2 drops excessively and the heat Water droplets such as drain may be attached to the exchanger 2.
【0069】第1ポジションと第2ポジションは、ある
入水温度等の条件下で、高温湯が沸騰せず、かつ過度に
温度低下することなく、所定の温度の湯を出湯させるこ
とができるように選定されたものである。第1ポジショ
ンは第2ポジションよりバイパス流量が大である。In the first position and the second position, hot water of a predetermined temperature can be discharged under conditions such as a certain water inlet temperature without boiling of the high temperature hot water and excessive lowering of the temperature. It was selected. The first position has a larger bypass flow rate than the second position.
【0070】図3は、本発明の制御の内容を示すフロー
チャートである。ステップ1において浴槽への落とし込
み指令があれば、落とし込み水路4に設けられた電磁弁
(図示せず)が開かれ、落とし込み水路4に湯が流され
る。そしてステップ2へ進み、落とし込み設定温度THS
と入水温度検知手段5によって検知される入水温度TC
の差が25℃以上か否かが判定される。ここで落とし込
み設定温度THSと入水温度TC の差が25℃以上でなけ
ればステップ3へ進み、ステッピングモータを動作させ
て流量可変手段9の開度θを図2における第1ポジショ
ンに固定する。すなわち流量可変手段9の混合比を第1
ポジションの比率に固定する。FIG. 3 is a flow chart showing the contents of control of the present invention. If there is a drop command to the bathtub in step 1, an electromagnetic valve (not shown) provided in the drop water channel 4 is opened, and hot water is poured into the drop water channel 4. Then, the process proceeds to step 2, dropped into the set temperature T HS
And the incoming water temperature T C detected by the incoming water temperature detecting means 5
It is determined whether or not the difference is 25 ° C or more. Here darken proceeds to set the temperature T HS and incoming water temperature T unless the difference in C is 25 ° C. or higher Step 3, fixed by operating the stepping motor the opening θ of the flow rate changing means 9 to the first position in FIG. 2 . That is, the mixing ratio of the flow rate changing means 9 is set to the first
Fixed to the position ratio.
【0071】一方、THSとTC との差が25℃以上であ
ればステップ11に進み、流量可変手段9の開度θを図
2の第2ポジションに固定する。尚、前記したように第
1ポジションは第2ポジションよりバイパス流量が大で
ある。ステップ3あるいはステップ11において決定さ
れる流量可変手段9の開度θは、高温湯温度検知手段2
2で検出される高温湯の温度が一定範囲(例えば50℃
≦TK ≦80℃)になるように固定されるのである。On the other hand, if the difference between T HS and T C is 25 ° C. or more, the routine proceeds to step 11, where the opening θ of the flow rate varying means 9 is fixed at the second position in FIG. As described above, the first position has a larger bypass flow rate than the second position. The opening degree θ of the flow rate varying means 9 determined in step 3 or step 11 is the hot water temperature detecting means 2
The temperature of the hot water detected in 2 is in a certain range (eg
≦ T K ≦ 80 ° C.).
【0072】すなわち、出湯を希望する設定温度と、入
水温度との差が小さい場合はバイパス流量を大として熱
交換器2を通る水量をしぼる。この理由は熱交換器2に
入る水量をしぼることにより、高温湯の温度を上昇させ
て熱交換器2の表面温度を上昇させ、前述のドレン等の
付着を回避するためである。従って、落とし込み設定温
度THSと入水温度TC の差が大きい場合は図2における
第2ポジションに流量可変手段9開度θを固定する。That is, when the difference between the desired temperature for tapping hot water and the incoming water temperature is small, the bypass flow rate is increased and the amount of water passing through the heat exchanger 2 is reduced. The reason for this is that by squeezing the amount of water entering the heat exchanger 2, the temperature of the high-temperature hot water is raised and the surface temperature of the heat exchanger 2 is raised, and the aforementioned adhesion of drain etc. is avoided. Therefore, darken if the difference between the set temperature T HS and incoming water temperature T C is large to fix the flow rate varying means 9 opening θ to the second position in FIG.
【0073】尚、本実施例においては入水温度TC と落
とし込み設定温度THSの差により流量可変手段9の混合
比を固定しているが、制御を簡略化するためには入水温
度TC あるいは落とし込み設定温度THSのそれぞれ単独
により開度θを固定しても実質上大きな問題は生じな
い。また入水温度TC と落とし込み設定温度THSの差を
25℃に限定する必要はなく、更に入水温度TC と落と
し込み設定温度THSの差により固定する開度θを2段階
ではなく3段階以上の多段階に設定してもよく、また逆
にただ一つのポジションしかなくてもよい。[0073] Although securing the mixing ratio of the flow rate varying means 9 by difference between the set temperature T HS darken the incoming water temperature T C in the present embodiment, in order to simplify the control incoming water temperature T C or substantially larger problem be fixed opening θ by the respective set temperature T HS alone darken does not occur. The incoming water temperature T C and dropped into the set temperature T difference need not be limited to 25 ° C. the HS, further incoming water temperature T C and dropped into the set temperature T HS difference three or more steps instead of the opening for fixing θ in two stages by the May be set in multiple stages, and conversely there may be only one position.
【0074】つまり、高温湯温度検知手段22で検出さ
れる高温湯の温度TK は混合後の総流量の高温湯に対す
る割合をZとして熱量保存則によりThat is, the temperature T K of the high-temperature hot water detected by the high-temperature hot-water temperature detecting means 22 is Z as a ratio of the total flow rate after mixing to the high-temperature hot water according to the heat conservation law.
【0075】TK =Z×THS−(Z−1)×TC [0075] T K = Z × T HS - (Z-1) × T C
【0076】で算出されるのであるが、TK が例えば5
0℃以上80℃以下となるように流量可変手段9の混合
比を固定しておけば熱交換器2本体のドレン等の水滴を
防止し得るのである。[0076] than is being calculated but, T K, for example, 5
If the mixing ratio of the flow rate varying means 9 is fixed so as to be 0 ° C. or more and 80 ° C. or less, water droplets such as drain of the heat exchanger 2 main body can be prevented.
【0077】ステップ3及びステップ11終了後は、ス
テップ4へ進み、ここで他栓使用の有無が判定される。
具体的には流量可変手段9の開度θに基づく混合比と高
温湯の流量QK により算出される総流量QT (QT =Q
K ×Z)と浴槽落とし込み流量QF との差(QT −QF
=QK ×Z−QF )が3リットル/分以上か否かの判定
を行う。そしてこの値が3リットル/分以上であれば台
所等の他栓が使用中であると判定して後述するステップ
9へ進む。After completion of steps 3 and 11, the process proceeds to step 4 where it is determined whether or not another plug is used.
Specifically, the total flow rate Q T (Q T = Q T) calculated from the mixture ratio based on the opening degree θ of the flow rate changing means 9 and the flow rate Q K of the hot water.
K × Z) and the flow rate Q F dropped into the bath (Q T −Q F
= Q K × Z−Q F ) is 3 liters / minute or more. If this value is 3 liters / minute or more, it is determined that the other plug of the kitchen or the like is in use, and the process proceeds to step 9 described later.
【0078】一方、3リットル/分以上でなければ台所
等他栓が使用されていないとみなし、後述するステップ
5へ進む。尚、ステップ4においては3リットル/分と
しているが、これは落とし込み流量センサ11及び高温
湯流量センサ6の器差等による誤差と、流量可変手段9
の開度θにより算出される出湯総流量の実際の総出湯量
に対する誤差とを考慮した流量であって、必ずしも3リ
ットル/分に限定する必要はない。On the other hand, if it is not more than 3 liters / minute, it is considered that other plugs such as kitchen are not used, and the process proceeds to step 5 described later. In step 4, 3 liters / min is set, but this is due to an error due to instrumental error of the drop flow rate sensor 11 and the hot water flow rate sensor 6, and the flow rate varying means 9.
This is a flow rate that takes into consideration the error of the total hot water discharge amount calculated by the opening degree θ of the actual hot water discharge amount, and is not necessarily limited to 3 liters / minute.
【0079】ステップ5においては流量可変手段9の開
度を固定したままで、混合後の湯の温度が落とし込み設
定温度THSに一致するようにガス量を制御する。すなわ
ち、発熱量FF制御部17において、入水温度TC と熱
交換器2を流れる流量QK から混合後の湯の温度が落と
し込み設定温度THSに一致させるための熱量調節手段7
の開度を演算し、この開度になるように熱量調節手段7
を調節してガス量をFF制御する。[0079] while fixing the opening degree of the flow rate varying means 9 in step 5, the temperature of the hot water after mixing to control the amount of gas to match the darken set temperature T HS. That is, in the heat generation amount FF control unit 17, the heat amount adjusting means 7 for adjusting the temperature of the mixed hot water from the incoming water temperature T C and the flow rate Q K flowing through the heat exchanger 2 to match the set temperature T HS.
Of the heat quantity adjusting means 7
Is adjusted to FF control the gas amount.
【0080】これと平行して同時に、ステップ3あるい
はステップ11で固定された流量可変手段9の開度θの
ままで、混合湯温度検知手段10が検知する検出値
TH 、すなわち混合後の湯の温度が落とし込み設定温度
THSとなるように発熱量FB制御部18でガス量をFB
制御するのである。ステップ6で浴槽内へ所定の落とし
込みが終了したかどうかが判断され、まだ設定水量に満
たない場合はステップ4の他栓使用の判断工程にもど
る。In parallel with this, at the same time, with the opening θ of the flow rate varying means 9 fixed in step 3 or step 11, the detected value T H detected by the mixed hot water temperature detecting means 10, that is, the hot water after mixing. FB gas amount calorific value FB control unit 18 so that the temperature of the darken set temperature T HS
Control it. In step 6, it is judged whether or not the predetermined dropping into the bathtub is completed, and if it is still less than the set water amount, the process returns to step 4 in which the other plug is used.
【0081】従って、浴槽内に、設定水量の湯が出湯さ
れるまで、他栓の使用状態を監視しつつ、ステップ5の
制御が継続する。ステップ6で設定水量の湯が出湯さる
たことが確認されると、ステップ7で浴槽への落とし込
みを終了する。尚ステップ7以降は風呂給湯装置の運転
を停止してもよいし、またステップ1へもどって他栓の
使用を待つ構成としてもよい。Therefore, the control of step 5 is continued while monitoring the usage state of the other plug until the set amount of hot water is discharged into the bathtub. When it is confirmed in step 6 that the set amount of hot water has been discharged, in step 7 the dropping into the bathtub is completed. The operation of the bath water heater may be stopped after step 7, or the procedure may be returned to step 1 to wait for the use of another plug.
【0082】また、浴槽への落とし込みの最中に、ステ
ップ4で流量可変手段9の開度θに基づく混合比と高温
湯の流量QK により算出される総流量QT (QT =QK
×Z)と浴槽落とし込み流量QF との差(QT −QF =
QK ×Z−QF )が3リットル/分以上となった場合
は、台所等の他栓が使用中であると判定して後述するス
テップ9へ進む。During dropping into the bathtub, the total flow rate Q T (Q T = Q K) calculated by the mixing ratio based on the opening degree θ of the flow rate changing means 9 and the flow rate Q K of the hot water in step 4.
× Z) and the flow rate Q F dropped into the bath (Q T −Q F =
When Q K × Z−Q F ) is 3 liters / minute or more, it is determined that the other plug of the kitchen or the like is in use, and the process proceeds to step 9 described later.
【0083】本実施例では、台所等の他栓が使用中であ
ることが判明した場合は、他栓の使用を優先し、他栓の
使用が終了するまで浴槽への落とし込みを停止する。In this embodiment, when it is found that the other plug is being used, such as a kitchen, the use of the other plug is prioritized, and the dropping into the bathtub is stopped until the use of the other plug is completed.
【0084】すなわち、ステップ4で他栓の使用が判明
すると、ステップ9へ進む際に落とし込み水路の電磁弁
(図示せず)を遮断し、落とし込み水路4への出湯を停
止する。ステップ9においては、高温湯の温度を一定に
保ち、他栓に出湯を希望する設定温度TTSに混合後の出
湯温度が一致するように流量可変手段9の開度θが調節
される。すなわち、まず給湯温度設定器21内で混合湯
の設定温度が落とし込み設定温度THSから他栓に出湯を
希望する設定温度TTSへ切り換えられる。That is, when it is determined in step 4 that the other plug has been used, the electromagnetic valve (not shown) in the drop channel is shut off when proceeding to step 9, and the tapping into the drop channel 4 is stopped. In step 9, the temperature of the high-temperature hot water is kept constant, and the opening degree θ of the flow rate varying means 9 is adjusted so that the hot water after mixing is matched with the desired temperature T TS at which hot water is discharged to the other tap. That is, first, in the hot water supply temperature setting device 21, the set temperature of the mixed hot water is switched from the drop set temperature T HS to the set temperature T TS at which hot water is desired to be discharged to another tap.
【0085】そして高温湯の温度が例えば80℃の温度
に安定するようにガス量を制御する。すなわち、発熱量
FF制御部17において入水温度TC と熱交換器2を流
れる流量QK から、高温湯の温度を高温湯設定温度TKS
に一致させるための熱量調節手段7の開度を演算し、こ
の開度になるように熱量調節手段7を調節してガス量を
FF制御する。Then, the amount of gas is controlled so that the temperature of the hot water is stabilized at a temperature of 80 ° C., for example. That is, in the heat generation amount FF control unit 17, the temperature of the high-temperature hot water is set to the high-temperature hot water set temperature T KS from the incoming water temperature T C and the flow rate Q K flowing through the heat exchanger 2.
The opening amount of the heat amount adjusting means 7 is calculated so as to match with, and the heat amount adjusting means 7 is adjusted so as to reach this opening amount, and the gas amount is FF controlled.
【0086】これと平行して、高温湯温度検知手段22
が検知する検出値TH 、すなわち高温湯の温度が高温湯
設定温度TKSに一致するように発熱量FB制御部18で
ガス量をFB制御する。In parallel with this, the hot water temperature detecting means 22
FB control unit 18 controls the amount of gas by the heat generation amount FB control unit 18 so that the detected value T H detected by, ie, the temperature of the high temperature hot water, matches the high temperature hot water set temperature T KS .
【0087】また混合比率FB制御部19では、ステッ
プ3またはステップ11で行われた流量可変手段9の開
度の固定が解除される。そして混合湯温度検知手段10
の検出値TH 、すなわち混合後の湯の温度が他栓に出湯
を希望する設定温度TTSとなるように、混合比率FB制
御部で流量可変手段9の開度θをFB制御する。Further, in the mixing ratio FB control section 19, the fixation of the opening degree of the flow rate varying means 9 performed in step 3 or step 11 is released. And the mixed hot water temperature detecting means 10
The mixing ratio FB control section FB controls the opening degree θ of the flow rate varying means 9 so that the detected value T H of the above , that is, the temperature of the hot water after mixing becomes the set temperature T TS at which hot water is desired to be discharged to the other tap.
【0088】この制御は、他栓の使用中繰り返し継続さ
れ、他栓の使用がなくなればステップ1へもどり再び浴
槽への落とし込みが再開される。This control is continuously repeated during the use of the other stopper, and when the other stopper is no longer used, the process returns to step 1 and the dropping into the bath is restarted.
【0089】また、風呂給湯装置はスタートされたが、
落とし込み指令が無い場合は、ステップ8で他栓への給
湯が行われているかどうかを確認する。例えば、主水路
1に通水があり、他栓が給湯中であることが判明すれ
ば、前記したステップ8へ進み他栓に給湯が続行され
る。逆に他栓が使用されていなければ、ステップ1に戻
り落とし込み指令を待つ。Although the bath water heater was started,
If there is no drop command, it is confirmed in step 8 whether hot water is being supplied to the other plug. For example, if it is found that there is water in the main waterway 1 and the other tap is being supplied with hot water, the process proceeds to step 8 described above, and hot water is continued to be supplied to the other tap. On the contrary, if the other plug is not used, the process returns to step 1 and waits for a drop command.
【0090】つぎに請求項4の発明の実施例について説
明する。図3で説明した風呂給湯装置は浴槽落とし込み
指令があれば入水温度と落とし込み設定温度の差によ
り、流量可変手段9の開度θを固定するのであるが、図
2のグラフで浴槽落とし込み指令前に、固定された開度
θが315°近傍であれば、バイパス水路3流れる流量
はゼロに近い。よって風呂落とし込み指令が行われる前
に台所等の他栓が使用されて熱交換器2本体内に高温湯
が滞留している場合においては、バイパス水量が少ない
ために熱交換器2本体内の滞留して後沸された高温湯が
浴槽へ直接落とし込まれて、使用者に危険である場合が
ある。そこでこの問題を解決したのが以下に述べる実施
例である。Next, an embodiment of the invention of claim 4 will be described. If there is a bathtub drop command, the bath water heater explained in FIG. 3 fixes the opening degree θ of the flow rate changing means 9 by the difference between the incoming water temperature and the drop set temperature, but before the bathtub drop command in the graph of FIG. When the fixed opening degree θ is near 315 °, the flow rate of the bypass water channel 3 is close to zero. Therefore, when hot water stays in the main body of the heat exchanger 2 due to the use of another plug in the kitchen or the like before the bath drop command is issued, the amount of bypass water is small and the hot water remains in the main body of the heat exchanger 2. Then, the high-temperature hot water boiled after that is dropped directly into the bathtub, which may be dangerous to the user. Therefore, this problem is solved by the embodiment described below.
【0091】図4は、請求項4の本発明の実施例を示す
フローチャートである。尚、本実施例におけるステップ
4からステップ10は前記した図3と同一であり、説明
を省略する。また、ステップ23は、図3のステップ
2、ステップ3、ステップ11の一連の工程をルーチン
化したものであり、図3の破線で囲んだ部分に相当す
る。ステップ20において浴槽への落とし込み指令があ
れば、落とし込み水路4に設けられた電磁弁(図示せ
ず)が開かれ落とし込み水路4に湯が流される。そして
直ちにステップ21に進む。ステップ21ではステップ
20における落とし込み指令後の時間Tが一定時間TO
を経過したか否かが判断される。ステップ20の指令後
一定時間TO が経過していなければステップ22に進
む。FIG. 4 is a flow chart showing an embodiment of the present invention according to claim 4. Note that steps 4 to 10 in this embodiment are the same as those in FIG. 3 described above, and a description thereof will be omitted. Further, step 23 is a routine in which a series of steps of step 2, step 3, and step 11 in FIG. 3 are routineized, and corresponds to a portion surrounded by a broken line in FIG. If there is a drop command to the bathtub in step 20, a solenoid valve (not shown) provided in the drop water channel 4 is opened and hot water is poured into the drop water channel 4. Then immediately proceed to step 21. In step 21, the time T after the drop command in step 20 is the constant time T O
It is determined whether or not has passed. If the predetermined time T O has not elapsed after the command in step 20, the process proceeds to step 22.
【0092】ステップ22においては、高温湯の温度を
一定に保ち、落とし込み設定温度THSに混合後の出湯温
度が一致するように流量可変手段9の開度θが調節され
る。[0092] In step 22, keeping the temperature of the hot water constant, the opening θ of the flow rate varying means 9 as hot water temperature after mixing the darken set temperature T HS match is adjusted.
【0093】すなわち、発熱量FF制御部17において
入水温度TC と熱交換器2を流れる流量QK から高温湯
の温度を高温湯設定温度TKSに一致させるための熱量調
節手段7の開度を演算し、この開度になるように熱量調
節手段7を調節してガス量をFF制御する。That is, in the heat generation amount FF control unit 17, the opening degree of the heat amount adjusting means 7 for making the temperature of the high temperature hot water match the high temperature hot water set temperature T KS from the incoming water temperature T C and the flow rate Q K flowing through the heat exchanger 2. Is calculated, and the heat amount adjusting means 7 is adjusted so as to achieve this opening degree, and the gas amount is FF controlled.
【0094】これと平行して、高温湯温度検知手段22
が検知する検出値TK 、すなわち高温湯の温度が高温湯
設定温度TKSに一致するように発熱量FB制御部18で
ガス量をFB制御する。両者で高温湯の温度が例えば8
0℃の高温湯設定温度TKSに安定するようにガス量を制
御する。In parallel with this, the hot water temperature detecting means 22
The heat generation amount FB control unit 18 performs FB control of the gas amount so that the detected value T K detected by, that is, the temperature of the high temperature hot water matches the high temperature hot water set temperature T KS . The temperature of the hot water is 8
The amount of gas is controlled so as to stabilize at the high temperature hot water set temperature T KS of 0 ° C.
【0095】そして混合湯温度検知手段10の検出値T
H すなわち混合後の湯の温度が落とし込み設定温度THS
となるように、混合比率FB制御部19で検出値TH を
流量可変手段9の開度θにフィードバックする。Then, the detected value T of the mixed hot water temperature detecting means 10
H, that is, the temperature of the hot water after mixing falls and the set temperature THS
Therefore, the mixture ratio FB control unit 19 feeds back the detected value T H to the opening degree θ of the flow rate changing means 9.
【0096】ステップ22の制御は上記したように高温
湯の温度が高温湯設定温度TKSに一致するように熱量調
節手段7がFF制御とFB制御され、混合後の出湯温度
が設定温度に一致するように流量可変手段9の開度がF
B制御されると言う基本構成は前記したステップ9と同
一である。しかしここでステップ22がステップ9と異
なる点は、ステップ9では他栓に出湯を希望する設定温
度TTSに混合後の出湯温度が一致するように流量可変手
段9の開度θが調節されるのに対し、ステップ22で
は、落とし込み設定温度THSとなるように流量可変手段
9の開度θが調節される。In the control of step 22, as described above, the heat quantity adjusting means 7 is controlled by the FF control and the FB control so that the temperature of the hot water matches the hot water set temperature T KS , and the hot water temperature after mixing matches the set temperature. As described above, the opening degree of the flow rate changing means 9 is F
The basic configuration of B control is the same as in step 9 described above. However, the point that step 22 is different from step 9 here is that in step 9, the opening degree θ of the flow rate varying means 9 is adjusted so that the hot water temperature after mixing matches the set temperature T TS at which hot water is desired to be discharged to the other tap. whereas, in step 22, the opening degree θ of the flow rate varying means 9 so as to darken the set temperature T HS is adjusted.
【0097】こうして一定時間の間は、流量可変手段9
の開度θが調節されて浴槽に湯が落とし込まれる。その
結果、例え後沸によって熱交換器2内に非常に熱い湯が
滞留していても、一定時間の間に熱交換器2内の湯が入
れ代わり、高温湯設定温度TKSに安定する。Thus, the flow rate changing means 9 is operated for a certain period of time.
The opening degree θ of is adjusted and hot water is dropped into the bathtub. As a result, even if very hot water stays in the heat exchanger 2 due to post-boiling, the hot water in the heat exchanger 2 is replaced within a certain period of time, and the hot water set temperature T KS is stabilized.
【0098】ステップ22で流量可変手段9をFB制御
することによる湯の落とし込みが継続されて、一定時間
TO を経過すると、ステップ23に進み、流量可変手段
9の開度が固定される。以下の工程は図3の実施例と全
く同一である。In step 22, the hot water is continuously dropped by the FB control of the flow rate changing means 9, and when a certain time T O has passed, the process proceeds to step 23, and the opening degree of the flow rate changing means 9 is fixed. The following steps are exactly the same as in the embodiment of FIG.
【0099】次に本発明の他の実施例について説明す
る。図5は、本発明の変形実施例の風呂給湯装置のフロ
ーチャートである。Next, another embodiment of the present invention will be described. FIG. 5 is a flowchart of a bath water heater according to a modified embodiment of the present invention.
【0100】本実施例は、流量可変手段9を固定する前
に一旦高温湯の温度を確認し、この温度が高温湯設定温
度TKSに安定していることを確認して、より安全性の向
上を図るものである。すなわち、ステップ30で浴槽落
とし込み指令があると、先の実施例と同様に落とし込み
水路4に設けられた電磁弁(図示せず)が開かれ、落と
し込み水路4に湯が流される。In this embodiment, the temperature of the hot water is temporarily checked before fixing the flow rate changing means 9, and it is confirmed that this temperature is stable at the hot water set temperature T KS to improve the safety. It is intended to improve. That is, when the bathtub drop command is issued in step 30, the solenoid valve (not shown) provided in the drop water channel 4 is opened as in the previous embodiment, and hot water is flown into the drop water channel 4.
【0101】そしてその次にステップ31に進み、高温
湯温度検知手段22で検出される実際の高温湯の温度T
K と高温湯設定温度TKSを比較する。そして、実際の高
温湯の温度TK から高温湯設定温度TKSを引いた値が5
℃よりも大きい場合は、熱交換器2内に滞留する湯が高
温になっていると判断して前述のステップ22へ進み、
ステップ22で流量可変手段9をFB制御して落とし込
みを行い、熱交換器2内に滞留する湯を置換する。Then, in step 31, the actual temperature T of the hot water detected by the hot water temperature detecting means 22 is detected.
Compare K with the hot water set temperature T KS . The value obtained by subtracting the set temperature T KS of hot water from the actual temperature T K of hot water is 5
If the temperature is higher than 0 ° C, it is determined that the hot water staying in the heat exchanger 2 is at a high temperature, and the process proceeds to step 22 described above.
In step 22, the flow rate varying means 9 is FB controlled and dropped to replace the hot water retained in the heat exchanger 2.
【0102】そして、実際の高温湯の温度TK から高温
湯設定温度TKSを引いた値が5℃よりも小さくなるまで
流量可変手段9のFB制御を繰り返す。両者の差が5℃
よりも小さくなれば、熱交換器2内に滞留する湯が入れ
代わり、高温湯設定温度TKSに安定したと判断してステ
ップ23に移行する。以下の工程は前記した図3の実施
例と全く同一である。Then, the FB control of the flow rate varying means 9 is repeated until the value obtained by subtracting the set temperature T KS of the hot water from the actual temperature T K of the hot water becomes smaller than 5 ° C. The difference between the two is 5 ℃
If it becomes smaller than this, the hot water staying in the heat exchanger 2 is replaced, and it is judged that the hot water set temperature T KS has stabilized, and the routine proceeds to step 23. The following steps are exactly the same as those of the embodiment shown in FIG.
【0103】また、より安全性の確保を目指す場合は、
図4の実施例の構成と、図5の実施例の構成を複合した
構成を採用する事ももちろん可能である。In order to secure the safety,
Of course, it is also possible to adopt a configuration in which the configuration of the embodiment of FIG. 4 and the configuration of the embodiment of FIG. 5 are combined.
【0104】図6は、図4の実施例の構成と、図5の実
施例の構成を複合した場合の風呂給湯装置のフローチャ
ートである。本実施例の風呂給湯装置では、浴槽落とし
込み指令40の後、前記したステップ21に進み、ステ
ップ21ではステップ40における指令後の時間Tが一
定時間TO を経過したか否かが判断される。そしてステ
ップ40指令後一定時間TO が経過していなければステ
ップ22に進み流量可変手段9のFB制御と、高温湯の
FF制御、FB制御が行われる。FIG. 6 is a flow chart of a bath water heater when the configuration of the embodiment of FIG. 4 and the configuration of the embodiment of FIG. 5 are combined. In the bath water heater of the present embodiment, after the bathtub drop command 40, the process proceeds to step 21 described above, and in step 21, it is determined whether the time T after the command in step 40 has exceeded a certain time T o . If the fixed time T O has not elapsed after the command at step 40, the routine proceeds to step 22, where the FB control of the flow rate varying means 9 and the FF control and FB control of the hot water are performed.
【0105】そして、上記した流量可変手段9のFB制
御と、高温湯のFF制御、FB制御が一定時間繰り返さ
れた後、ステップ31に進み、今度は高温湯温度検知手
段22で検出される実際の高温湯の温度TK と高温湯設
定温度TKSを比較する。そして、実際の高温湯の温度T
K から高温湯設定温度TKSを引いた値が5℃よりも小さ
くなるまで流量可変手段9のFB制御を繰り返す。この
様に、高温湯の温度の安定を2回の工程で確認したの
ち、初めてステップ23に移行する。その後は図3の工
程と全く同じ工程を行う。After the FB control of the flow rate varying means 9 and the FF control and FB control of the high temperature hot water are repeated for a certain period of time, the routine proceeds to step 31, where the high temperature hot water temperature detecting means 22 detects the actual condition. The high temperature hot water temperature TK and the high temperature hot water set temperature TKS are compared. And the actual temperature T of the hot water
The FB control of the flow rate varying means 9 is repeated until the value obtained by subtracting the high temperature hot water set temperature T KS from K becomes smaller than 5 ° C. In this way, after confirming the stability of the temperature of the high-temperature hot water in the two processes, the process proceeds to step 23 for the first time. After that, the same steps as those of FIG. 3 are performed.
【0106】[0106]
【発明の効果】本発明の風呂給湯装置は、風呂へ湯を落
とし込む際、所定の混合比率の状態で流量可変手段を一
旦固定し、高温湯の流量とバイパス水路を流れる水量の
割合が全く変化しない状態を作り、この時の混合比率と
混合前流量検知手段が検知する高温湯等の水量から、混
合出湯の総流量を演算する。従って、混合出湯の総流量
の演算値は、信頼性が高い。そのため本発明の風呂給湯
装置は、正確な他栓使用の判定ができる効果がある。In the bath water heater of the present invention, when the hot water is dropped into the bath, the flow rate varying means is temporarily fixed in a state of a predetermined mixing ratio so that the flow rate of the high temperature hot water and the rate of the amount of water flowing through the bypass channel change at all. A state where no mixing is performed is made, and the total flow rate of the mixed hot water is calculated from the mixing ratio at this time and the amount of water such as high-temperature hot water detected by the pre-mixing flow rate detecting means. Therefore, the calculated value of the total flow rate of the mixed hot water is highly reliable. Therefore, the bath water heater of the present invention has an effect of being able to accurately determine the use of the other plug.
【0107】また、本発明の風呂給湯装置は、通常の風
呂給湯装置に具備される温度検知手段等以外の、特別な
部材を必要とせず、部品点数を増加させることなく正確
な他栓使用の判定を行うことができる効果がある。Further, the bath water heater according to the present invention does not require any special member other than the temperature detecting means or the like provided in the usual bath water heater, and the accurate use of another plug without increasing the number of parts. There is an effect that a judgment can be made.
【0108】請求項2の発明は、流量可変手段の混合比
率を予め複数設定しておき、熱交換器に入水される入水
温度等に基づいて流量可変手段の混合比率が選択して流
量可変手段を固定することにより、高温湯が沸騰せず、
かつ熱交換器の表面に水滴を発生させない範囲に高温湯
の温度を維持することができる。そのため、本発明の風
呂給湯装置は、熱交換器表面にサビが発生したり、穴あ
き等の腐食を引き起こすことがなく、丈夫で永く使用す
ることができる効果がある。According to the second aspect of the present invention, a plurality of mixing ratios of the flow rate changing means are set in advance, and the mixing ratio of the flow rate changing means is selected based on the temperature of the water entering the heat exchanger and the like. By fixing, hot water does not boil,
In addition, the temperature of the high-temperature hot water can be maintained in a range where water drops are not generated on the surface of the heat exchanger. Therefore, the bath water heater according to the present invention is strong and can be used for a long time without causing rust on the surface of the heat exchanger or causing corrosion such as perforation.
【0109】請求項3の発明は、他栓使用の判定を行
い、他栓使用が無いと判断されたときは、熱源器の発熱
量を調節して、所定の温度の湯を出湯させて落とし込み
を行い、他栓使用が有ると判断されたときは、高温湯の
温度を所定の高温湯設定温度に安定させるとともに流量
可変手段の混合比率を変化させる。このように、他栓の
使用状況に応じて制御手段を適切なものに切り換え、使
用者が希望する温度の湯を何時でも直ちに出湯させるこ
とができる効果がある。According to the third aspect of the present invention, it is determined whether the other plug is used, and when it is determined that the other plug is not used, the calorific value of the heat source device is adjusted, and hot water having a predetermined temperature is tapped out and dropped. When it is determined that the other plug is used, the temperature of the hot water is stabilized at a predetermined hot water set temperature and the mixing ratio of the flow rate varying means is changed. In this way, there is an effect that the control means can be switched to an appropriate one according to the usage status of the other plug, and hot water of the temperature desired by the user can be immediately discharged at any time.
【0110】また加えて、高温湯の温度も適切に制御さ
れ、熱交換器表面にサビが発生したり、穴あき等の腐食
を引き起こすことがなく、丈夫で永く使用することがで
きる効果がある。In addition, the temperature of the high-temperature hot water is appropriately controlled, and there is an effect that it does not cause rust on the surface of the heat exchanger and does not cause corrosion such as perforation, and is durable and can be used for a long time. .
【0111】請求項4の発明では、流量可変手段の混合
比率の固定が、落とし込み給湯指令の後、一定時間経過
後に行われるので、この時間の間に熱交換器の中に滞留
した高温の湯の多くが入れ代えられ、高温湯の温度が安
定する。そのため、落とし込み初期に熱い湯が出湯され
る事が未然に防止され、安全性が高い効果がある。According to the fourth aspect of the present invention, the mixing ratio of the flow rate varying means is fixed after a lapse of a certain time after the drop hot water supply command. Therefore, the high temperature hot water staying in the heat exchanger during this time is fixed. Many of them are replaced, and the temperature of the hot water stabilizes. Therefore, hot water is prevented from coming out in the early stage of dropping, and there is an effect of high safety.
【0112】請求項5の発明では、落とし込み給湯側の
弁を開く前に現実の高温湯の高温湯設定温度を比較し、
そして両者の差が一定温度以内の場合に、流量可変手段
の混合比率を固定する。すなわち、高温湯の温度が安定
していることを確認したのちに、流量可変手段の混合比
率を固定するので、後沸による高温の湯が出湯されるこ
とがなく、安全性が高い効果がある。According to the fifth aspect of the invention, the hot water set temperatures of the actual hot water are compared before opening the valve on the hot water supply side.
When the difference between the two is within a certain temperature, the mixing ratio of the flow rate varying means is fixed. That is, after confirming that the temperature of the high-temperature hot water is stable, the mixing ratio of the flow rate varying means is fixed, so that high-temperature hot water is not discharged due to post-boiling, and there is a high safety effect. .
【図1】本発明の風呂給湯装置の構成図である。FIG. 1 is a configuration diagram of a bath water heater according to the present invention.
【図2】流量可変手段の開度と実際の湯水の混合比率の
関係を示すグラフである。FIG. 2 is a graph showing the relationship between the opening degree of the flow rate varying means and the actual mixing ratio of hot and cold water.
【図3】請求項1記載の発明の実施例を示す風呂給湯装
置のフローチャートである。FIG. 3 is a flow chart of a bath water heater showing an embodiment of the invention according to claim 1.
【図4】請求項4記載の発明の実施例を示す風呂給湯装
置のフローチャートである。FIG. 4 is a flowchart of a bath water heater showing an embodiment of the invention according to claim 4;
【図5】請求項5記載の発明の変形実施例を示す風呂給
湯装置のフローチャートである。FIG. 5 is a flowchart of a bath water heater showing a modified embodiment of the invention according to claim 5;
【図6】図4の実施例の構成と、図5の実施例の構成を
複合した場合の風呂給湯装置のフローチャートである。6 is a flowchart of a bath water heater when the configuration of the embodiment of FIG. 4 and the configuration of the embodiment of FIG. 5 are combined.
【図7】上記した水流スイッチにより他栓使用の判定を
する従来技術の風呂給湯装置の構成図である。FIG. 7 is a configuration diagram of a conventional bath hot water supply device that determines whether or not another plug is used by the water flow switch described above.
【図8】流量計を用いて他栓使用の判定をする従来技術
の風呂給湯装置の構成図である。FIG. 8 is a configuration diagram of a bath water heater according to the related art which uses a flow meter to determine whether another plug is used.
1 主水路 2 熱交換器 3 バイパス水路 4 落とし込み水路 5 入水温度検知手段 6 高温湯流量センサ 7 熱量調節手段 8 熱源器 9 流量可変手段 10 混合湯温度検知手段 11 落とし込み流量センサ 17 発熱量フィードフォワード制御部 18 発熱量フィードバック制御部 19 混合比率フィードバック制御部 20 混合弁開度設定部 21 給湯温度設定器 22 高温湯温度検知手段 31 コントローラ 1 Main Water Channel 2 Heat Exchanger 3 Bypass Water Channel 4 Drop Water Channel 5 Inlet Water Temperature Detection Means 6 High Temperature Hot Water Flow Sensor 7 Heat Quantity Adjusting Means 8 Heat Source 9 Flow Rate Changing Means 10 Mixed Hot Water Temperature Detection Means 11 Drop Water Flow Sensor 17 Heat Generation Feedforward Control Part 18 Heat generation amount feedback control part 19 Mixing ratio feedback control part 20 Mixing valve opening setting part 21 Hot water supply temperature setting device 22 High temperature hot water temperature detecting means 31 Controller
Claims (5)
並列に接続されたバイパス水路と、バイパス水路を流れ
る水と熱交換器から出湯される高温湯を混合する湯水混
合部と、主水路から分岐された落とし込み水路と、バイ
パス水路を流れる水と高温湯の混合比率を調節する流量
可変手段と、熱交換器を加熱する熱源器と、混合湯の温
度が出湯を希望する設定温度に等しくなるように流量可
変手段を制御する混合比率制御手段とを備えた風呂給湯
装置において、高温湯の流量あるいはバイパス水路を流
れる水の流量を検知する混合前流量検知手段と、落とし
込み水路を流れる水量を検知する落とし込み水量検知手
段とを有し、所定の混合比率で流量可変手段を一旦固定
し、混合前流量検知手段の検出値および流量可変手段の
混合比率により算出される混合出湯の総流量と落とし込
み水量検知手段の検出値とを比較し、両者の差が一定量
以上であれば流量可変手段の混合比率の固定を解除する
他栓割り込み制御手段を有することを特徴とする風呂給
湯装置。1. A main water channel provided with a heat exchanger, a bypass water channel connected in parallel with the heat exchanger, and a hot and cold water mixing section for mixing water flowing through the bypass water channel with high-temperature hot water discharged from the heat exchanger. , Drop-in water channel branched from the main water channel, flow rate variable means for adjusting the mixing ratio of hot water and hot water flowing in the bypass water channel, heat source device for heating the heat exchanger, and the temperature of the mixed hot water is set to the desired hot water output. In a bath water heater provided with a mixing ratio control means for controlling the flow rate varying means so as to be equal to the temperature, a pre-mixing flow rate detecting means for detecting the flow rate of high-temperature hot water or the flow rate of water flowing in the bypass water channel, and a drop water channel are provided. It has drop water amount detecting means for detecting the amount of flowing water, temporarily fixes the flow rate varying means at a predetermined mixing ratio, and calculates it based on the detection value of the pre-mixing flow rate detecting means and the mixing ratio of the flow rate varying means. Comparing the total flow rate of the mixed hot water with the detection value of the dropped water amount detection means, and if the difference between the two is equal to or more than a certain amount, the other plug interrupt control means for releasing the fixation of the mixing ratio of the flow rate changing means is provided. Characteristic bath water heater.
されており、熱交換器あるいはバイパス水路に入水され
る入水温度、落とし込み設定温度、前記入水温度と落と
し込み設定温度の差のいずれかに基づいて流量可変手段
の混合比率が選択され、この選択された混合比率によっ
て流量可変手段が一旦固定される制御手段を有すること
を特徴とする請求項1記載の風呂給湯装置。2. A plurality of mixing ratios of the flow rate varying means are set in advance, and the mixing ratio is set to any one of the incoming water temperature entering the heat exchanger or the bypass water channel, the drop set temperature, and the difference between the incoming water temperature and the drop set temperature. 2. The bath water heater according to claim 1, further comprising control means for selecting a mixing ratio of the flow rate changing means based on the selected mixing ratio and temporarily fixing the flow rate changing means according to the selected mixing ratio.
を検知する混合湯温度検知手段と、熱源器の発熱量を調
節する熱量調節手段と、高温湯の温度を検出する高温湯
温度検知手段とを有し、混合前流量検知手段の検出値お
よび流量可変手段の混合比率により算出される混合出湯
の総流量と落とし込み水量検知手段の検出値との差が一
定量未満であれば、湯水混合部から出湯される混合湯の
温度が落とし込み設定温度に等しくなるように熱源器の
発熱量を調節し、前記混合出湯の総流量と落とし込み水
量検知手段の検出値との差が一定量以上の場合は流量可
変手段の混合比率の固定を解除するとともに高温湯の温
度が所定の高温湯設定温度となるように熱源器の発熱量
を調節する制御手段を有することを特徴とする請求項1
または2のいずれかに記載の風呂給湯装置。3. A mixed hot water temperature detecting means for detecting the temperature of the mixed hot water discharged from the hot and cold water mixing portion, a heat quantity adjusting means for adjusting the heat generation amount of the heat source device, and a high temperature hot water temperature detecting for detecting the temperature of the high temperature hot water. If the difference between the total flow rate of the mixed hot water calculated by the detection value of the pre-mixing flow rate detection means and the mixing ratio of the flow rate varying means and the detection value of the drop water amount detection means is less than a certain amount, The heating value of the heat source device is adjusted so that the temperature of the mixed hot water discharged from the mixing section becomes equal to the drop set temperature, and the difference between the total flow rate of the mixed hot water and the detected value of the dropped water amount detection means is a certain amount or more. In this case, there is provided control means for releasing the fixation of the mixing ratio of the flow rate varying means and adjusting the heat generation amount of the heat source device so that the temperature of the hot water reaches a predetermined hot water set temperature.
Alternatively, the bath water heater according to any one of 2 and 3.
し込み給湯指令の後、一定時間経過後に行われる事を特
徴とする請求項1乃至3のいずれかに記載の風呂給湯装
置。4. The bath water heater according to claim 1, wherein the mixing ratio of the flow rate varying means is fixed after a lapse of a fixed time after the drop hot water supply command.
段と、高温湯の温度が所定の高温湯設定温度となるよう
に調節する制御手段を有し、落とし込み給湯指令の後、
高温湯温度検知手段により検知された温度と高温湯設定
温度とを比較し両者の差が一定温度以内であれば流量可
変手段の混合比率を固定する制御手段を有することを特
徴とする請求項1乃至4のいずれかに記載の風呂給湯装
置。5. A hot-water temperature detecting means for detecting the temperature of the hot-water, and a control means for adjusting the temperature of the hot-water to a predetermined hot-water set temperature, and after the drop-in hot-water supply command,
The control means for comparing the temperature detected by the high-temperature hot water temperature detecting means with the high-temperature hot water set temperature, and fixing the mixing ratio of the flow rate varying means if the difference between them is within a certain temperature. 5. A bath water heater according to any one of 4 to 4.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4163528A JPH0760016B2 (en) | 1992-05-29 | 1992-05-29 | Bath water heater |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4163528A JPH0760016B2 (en) | 1992-05-29 | 1992-05-29 | Bath water heater |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH06288612A JPH06288612A (en) | 1994-10-18 |
JPH0760016B2 true JPH0760016B2 (en) | 1995-06-28 |
Family
ID=15775589
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4163528A Expired - Fee Related JPH0760016B2 (en) | 1992-05-29 | 1992-05-29 | Bath water heater |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0760016B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013050220A (en) * | 2011-08-30 | 2013-03-14 | Noritz Corp | Heat source machine |
JP2016205756A (en) * | 2015-04-27 | 2016-12-08 | 株式会社ノーリツ | Water heater |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9885497B2 (en) | 2015-04-22 | 2018-02-06 | Haier Us Appliance Solutions, Inc. | Method for operating a water heater appliance |
-
1992
- 1992-05-29 JP JP4163528A patent/JPH0760016B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013050220A (en) * | 2011-08-30 | 2013-03-14 | Noritz Corp | Heat source machine |
JP2016205756A (en) * | 2015-04-27 | 2016-12-08 | 株式会社ノーリツ | Water heater |
Also Published As
Publication number | Publication date |
---|---|
JPH06288612A (en) | 1994-10-18 |
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