【発明の詳細な説明】
産業上の利用分野
本発明は湯と水の混合比率を調整し最適な混合湯温を得
る湯水混合制御装置に関するものである．従来の技術
従来この種の湯水混合装置は第４図に示すようなものが
あった．
第４図において、１は湯流路、２は水流路であり、各流
路に関連して自動調圧弁３が設けられている．自動調圧
弁３は、湯流路ｌの１次圧力ＰＨ１を減圧する湯側弁体
４、湯側弁座５と、水流路２の１次圧力Ｐｃｔを減圧す
る水側弁体６、水側弁座７と、湯側弁体４と水側弁体６
を連結する弁軸８と、湯と水の減圧後の１次圧ＰＨＩ，
Ｐｃｔの圧力差で動作するピストン９とで構威されてお
り、湯または水の圧力がｔ変してもその圧力で自動調圧
弁３が移動し、湯と水の２次圧ＰＨ２とＰＣ２とが常に
等しく保たれるように作用する．湯と水の混合比はモー
タ１１によって付勢される温調弁１２を左右に移動させ
て可変し、混合温度を変える， １３は湯と水との混合
部であり、混合後は流量調節開閉弁ｌ４を介して出湯さ
れるが、その温度は混合湯温検出手段（例えばサーミス
タ）ｌ５によって、またその流量は流量検出手段１６に
よって検知され、設定手段１７の値に一敗させるべく制
御手段ｌ８がモータ１ｌと流量調節開閉弁１４を付勢す
る．発明が解決しようとする課題
しかしながら上記のような構或では、圧力条件や温度条
件により自動調圧弁が振動を生じることがある．
また、モータにより温調弁Ｉ２を付勢しているため応答
が遅く、混合湯温検出手段からの信号のみでモータを制
御する混合湯温検出手段の時間遅れなどによりハンチン
グ現象を起こすことがある．本発明はかかる従来のｔＷ
！題を解消するもので、振動検出手段により混合弁の振
動を検出すると駆動信号の位相を切り替え振動点を変化
することにより振動を抑え安定した混合湯温を供給する
ことを目的とする．
課題を解決するための手段
上記課題を解決するために本発明の湯水混合制御装置は
、渦流路および水流路と、前記渦流路および水流路の流
量を調節する混合弁と、前記混合弁を駆動する混合弁駆
動手段と、前記混合弁の振動を検出する振動検出手段と
、前記混合弁駆動手段の駆動量を制御する制御手段とか
らなり、前記制御手段は前記振動検出手段の信号により
駆動信号の位相を変化する構戒としたものである．作用
以上のｆ！戒により、振動検出手段の信号によりより駆
動信号の位相を切り替えて混合弁の振動を抑える．
実施例
以下、本発明の一実施例を図面を用いて説明する．なお
、第１図は湯水混合装置の断面図で第４図と同一部品に
ついては同一番号を付している．ｌ９は付勢手段で、自
動調圧弁３と付勢手段ｌ９で混合弁２０を形或する．
２１は前記付勢手段１９の力と対向して可変バイアスカ
を付与する駆動手段である．！＄１！動手段２１は、磁
性体からなるブランジャ２２と、前記プランジャ２２の
周りに防水および絶縁されたコイル２３を有し、前記コ
イル２３は制御手段１８に接続されている．流量は流量
検出手段１６で検出する．２４は制御手段１８の出力で
ある駆動信号を検出し、駆動信号の乱れから混合弁の振
動を検出する振動検出手段である．
第２図は制御手段１８の例である．２５は主制御手段で
、２６は駆動量設定手段で、２７は交流信号発生手段で
、２８は比較手段である．
次に本発明の構成の動作を説明する．
制御手段１８からコイル２３に電流を流すと、磁性体か
らなるブランジ中２２はフレ果ングの法則により弁軸８
にバイアス力を付与する。このバイアス力と付勢手段１
９の付勢力がつりあったところで自動調圧弁はバランス
する．
したがって、コイル２３に流す電流を変化することによ
り自動調圧弁３のバランス点を移動することができる．
例えば、電流の小さい場合は付勢手段１９の力の方が強
いため湯側弁体４より水側弁体６の方が大きく開き、出
湯温度が低くなる．
電流を大きくすると付勢手段！９の力に対向してブラン
ジ中２２を押し出すことにより湯側弁体４が開きだし結
果的に出湯温度が高くなる．このようにして、制御手段
１８は混合湯温検出手段１５の信号と設定手段ｌ７の信
号を入力することにより出湯温度が設定温度になるよう
にコイル２３に流す電流を調節する．
この際、コイル２３に流す電流が直流電流では、磁気回
路からなる駆動手段２１のヒステリシス特性や駆動開始
時の摺動抵抗により弁軸８を早く動かし混合湯温の温度
調節を行なうことが難しい．したがって上記の現象を防
ぐため、交流信号発生千段２７は主制御手段２５からの
制御信号により交流信号を発生する．この信号を駆動量
設定手段２Ｇに送りコイルに流す電流には交流信号を重
畳する．これにより、磁気回路からなる駆動手段２１の
ヒステリシス特性や駆動開始時の摺動抵抗を少なくする
ことができる．
しかし、外乱（湯流路１または水流路２の上流からのポ
ンプなどによる脈動）により弁軸８が振動することがあ
る．これらの現象を止める手段を以下に説明する．
通常、駆動量設定手段２６からの駆動信号は交流信号発
生手段２７の交流信号と位相が合っている．したがって
振動検出手段２４の信号と交流信号発生手段２７の信号
を比較手段２８に入力して位相差をとるとほとんど無い
．しかし、何らかの原因でハンチングや振動が生じた場
合、弁軸８が振動しブランジャ２２もそれにあわせてコ
イル２３のなかを出入りする。このためコイルの逆起電
力が発生し、この影響で駆動信号の波形が歪んでくる。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a hot water mixing control device that adjusts the mixing ratio of hot water and water to obtain an optimal mixed water temperature. Prior Art Conventionally, there was a hot water mixing device of this type as shown in Fig. 4. In FIG. 4, 1 is a hot water flow path, 2 is a water flow path, and an automatic pressure regulating valve 3 is provided in relation to each flow path. The automatic pressure regulating valve 3 includes a hot water side valve body 4 that reduces the primary pressure PH1 of the hot water flow path 1, a hot water side valve seat 5, a water side valve body 6 that reduces the pressure of the primary pressure Pct of the water flow path 2, and a water side valve body 4 that reduces the primary pressure PH1 of the hot water flow path 1. Valve seat 7, hot water side valve body 4, and water side valve body 6
and the primary pressure PHI after depressurizing the hot water and water,
The piston 9 operates with a pressure difference of Pct, and even if the pressure of hot water or water changes by t, the automatic pressure regulating valve 3 moves with that pressure, and the secondary pressures PH2 and PC2 of the hot water and water change. acts so that they are always kept equal. The mixing ratio of hot water and water is varied by moving the temperature control valve 12 energized by the motor 11 from side to side to change the mixing temperature. 13 is a mixing part for hot water and water, and after mixing, the flow rate is adjusted by opening and closing. Hot water is dispensed through a valve l4, and its temperature is detected by a mixed hot water temperature detection means (for example, a thermistor) l5, and its flow rate is detected by a flow rate detection means 16, and a control means l8 is used to set the temperature to the value of the setting means 17. energizes the motor 1l and the flow control valve 14. Problems to be Solved by the Invention However, in the above structure, the automatic pressure regulating valve may vibrate depending on pressure and temperature conditions. In addition, since the temperature control valve I2 is energized by the motor, the response is slow, and a hunting phenomenon may occur due to a time delay in the mixed water temperature detection means that controls the motor only with the signal from the mixed water temperature detection means. ．． The present invention provides such conventional tW
! The purpose of this system is to suppress the vibration and supply a stable mixed water temperature by changing the vibration point by changing the phase of the drive signal when vibration of the mixing valve is detected by the vibration detection means. Means for Solving the Problems In order to solve the above problems, the hot water mixing control device of the present invention includes a vortex flow path and a water flow path, a mixing valve that adjusts the flow rates of the vortex flow path and the water flow path, and a mixing valve that drives the mixing valve. vibration detection means for detecting vibrations of the mixing valve; and control means for controlling the amount of drive of the mixing valve drive means; This is a system that changes the phase of . f more than action! Accordingly, the vibration of the mixing valve is suppressed by switching the phase of the drive signal based on the signal from the vibration detection means. EXAMPLE An example of the present invention will be described below with reference to the drawings. Note that Figure 1 is a cross-sectional view of the hot water mixing device, and the same parts as in Figure 4 are given the same numbers. Reference numeral 19 denotes an urging means, and the automatic pressure regulating valve 3 and the urging means 19 form a mixing valve 20.
Reference numeral 21 denotes a driving means that opposes the force of the urging means 19 and applies a variable bias force. ! $1! The moving means 21 has a plunger 22 made of a magnetic material, and a waterproof and insulated coil 23 surrounding the plunger 22, and the coil 23 is connected to the control means 18. The flow rate is detected by flow rate detection means 16. 24 is a vibration detection means that detects a drive signal that is the output of the control means 18 and detects vibration of the mixing valve from disturbances in the drive signal. FIG. 2 shows an example of the control means 18. 25 is main control means, 26 is drive amount setting means, 27 is AC signal generation means, and 28 is comparison means. Next, the operation of the configuration of the present invention will be explained. When a current is applied to the coil 23 from the control means 18, the flange member 22 made of a magnetic material moves to the valve shaft 8 according to Fletcher's law.
imparts bias force to. This bias force and biasing means 1
The automatic pressure regulating valve will be balanced when the biasing forces 9 are balanced. Therefore, by changing the current flowing through the coil 23, the balance point of the automatic pressure regulating valve 3 can be moved. For example, when the current is small, the force of the biasing means 19 is stronger, so the water side valve body 6 opens more than the hot water side valve body 4, and the outlet temperature of the hot water becomes lower. When the current is increased, it becomes an energizing means! By pushing out the bunging medium 22 against the force 9, the hot water side valve body 4 begins to open, and as a result, the temperature of the hot water rises. In this manner, the control means 18 receives the signal from the mixed hot water temperature detection means 15 and the signal from the setting means 17, and thereby adjusts the current flowing through the coil 23 so that the outlet temperature of the hot water becomes the set temperature. At this time, if the current flowing through the coil 23 is a direct current, it is difficult to quickly move the valve shaft 8 and adjust the temperature of the mixed water due to the hysteresis characteristics of the drive means 21 consisting of a magnetic circuit and the sliding resistance at the start of the drive. Therefore, in order to prevent the above phenomenon, the AC signal generation stage 27 generates an AC signal in response to a control signal from the main control means 25. This signal is sent to the drive amount setting means 2G and an alternating current signal is superimposed on the current flowing through the coil. Thereby, the hysteresis characteristic of the drive means 21 consisting of a magnetic circuit and the sliding resistance at the start of drive can be reduced. However, the valve shaft 8 may vibrate due to disturbance (pulsation caused by a pump or the like from upstream of the hot water flow path 1 or the water flow path 2). The means to stop these phenomena are explained below. Normally, the drive signal from the drive amount setting means 26 is in phase with the AC signal from the AC signal generation means 27. Therefore, when the signal from the vibration detection means 24 and the signal from the AC signal generation means 27 are input to the comparison means 28 and the phase difference is taken, there is almost no difference. However, if hunting or vibration occurs for some reason, the valve shaft 8 will vibrate and the plunger 22 will move in and out of the coil 23 accordingly. For this reason, a back electromotive force is generated in the coil, and the waveform of the drive signal is distorted due to this influence.
（第３図（ａ））Ｌたがって振動検出手段２４の信号と
交流信号発生千段２７の信号を比較手段２８に入力して
位相差をとると差が生じる。比較手段２８は位相差を検
出するとそれを主制御手段２５に伝え、主制御手段２５
は振動発生を検出できる．
振動を検出すると主制御千段２５はそれを抑えるため駆
動信号と逆位相の信号を出力する（第３図（ｂＪＸ点）
よる駆動量制１１１手段２６に信号を出す．駆動信号の
位相がコイル２３の逆起電力と１８０度異なる（第３図
（ロ））ことによりコイル２３に振動と反対の力がはた
らきその結果振動がおさまり混合湯温は設定温度に等し
くなり安定する．
上記実施例においては、交流信号発生手段２７と振動検
出手段２４の信号を比較手段２８に入力して位相差を検
出したが、ヒステリシス特性の少ない駆動千段２ｌを用
いた場合等は交流信号発生手段２７が無くても良い．こ
の場合は、主制御手段２５の信号と振動検出手段２４の
信号を比較手段に入力し位相差をとって振動を検出する
ことができる．上記実施例では振動検出手段として駆動
信号そのものの変化を調べることにより検出手段を別に
設けることなく構成できる．
通常の使用状態においては水圧変動時には従来と同様に
自動調圧弁３が動作し、湯側弁体４、水側弁体６とピス
トン９との受圧面積を等しくしておけばその２次圧ＰＩ
−１２とＰＣ２とは付勢手段ｌ９と可変バイアス手段２
０によるバランス点での状態を保つ．
さらに、調圧弁と温調弁とを１つにできるため形を小さ
く構威することができる．
発明の効果
以上のように本発明の湯水混合制御装置は、湯流路およ
び水流路と、前記湯流路および水流路の流量を調節する
混合弁と、前記混合弁を駆動する混合弁駆動手段と、前
記混合弁の振動を検出する振動検出手段と、前記混合弁
駆動手段の駆動量を制御する制御手段とからなり、前記
制御手段は前記振動検出手段の信号により駆動信号の位
相を変化する構或を備えたので、外乱などにより弁軸が
振動を生しても、それを検出し抑えることができ安定な
湯温を供給することができる。(FIG. 3(a)) Therefore, when the signal from the vibration detection means 24 and the signal from the AC signal generation stage 27 are input to the comparison means 28 and a phase difference is taken, a difference occurs. When the comparison means 28 detects a phase difference, it transmits it to the main control means 25, and the main control means 25
can detect vibration occurrence. When vibration is detected, the main control stage 25 outputs a signal with the opposite phase to the drive signal in order to suppress it (Fig. 3 (point bJX)
A signal is sent to the drive amount control means 26 according to the drive amount control 111. Since the phase of the drive signal is 180 degrees different from the counter electromotive force of the coil 23 (Figure 3 (b)), a force opposite to the vibration acts on the coil 23, and as a result, the vibration subsides and the mixed water temperature becomes equal to the set temperature and stabilizes. do. In the above embodiment, the signals from the AC signal generating means 27 and the vibration detecting means 24 are input to the comparing means 28 to detect the phase difference. However, when a 1,000-stage drive 2L with less hysteresis characteristics is used, etc., the AC signal can be generated. Means 27 may not be provided. In this case, vibration can be detected by inputting the signal from the main control means 25 and the signal from the vibration detection means 24 to the comparison means and taking the phase difference. In the above embodiment, the vibration detection means can be constructed without providing a separate detection means by examining changes in the drive signal itself. In normal use, when the water pressure fluctuates, the automatic pressure regulating valve 3 operates as before, and if the pressure receiving areas of the hot water side valve body 4, water side valve body 6, and piston 9 are made equal, the secondary pressure PI
-12 and PC2 are biasing means l9 and variable bias means 2
Maintain the state at the balance point due to 0. Furthermore, since the pressure regulating valve and temperature regulating valve can be combined into one, the size can be made smaller. Effects of the Invention As described above, the hot water mixing control device of the present invention includes a hot water flow path, a water flow path, a mixing valve that adjusts the flow rates of the hot water flow path and the water flow path, and a mixing valve driving means that drives the mixing valve. , vibration detection means for detecting vibration of the mixing valve, and control means for controlling the driving amount of the mixing valve driving means, and the control means changes the phase of the drive signal according to the signal of the vibration detection means. With this structure, even if the valve shaft vibrates due to external disturbances, it can be detected and suppressed, and a stable water temperature can be supplied.
【図面の簡単な説明】[Brief explanation of drawings]
第１図は本発明の一実施例の湯水混合制御装置の断面図
、第２図は同湯水混合装置の制御プロ・冫ク図、第３図
は同装置の駆動信号の特性図、第４図は従来の湯水混合
制御装置の断面図である。
１・・・・・・湯流路、２・・・・・・水流路、ｌ８・
・・・・・制御手段、２１・・・・・・駆動手段、２５
・・・・・・振動検出手段。FIG. 1 is a cross-sectional view of a hot water mixing control device according to an embodiment of the present invention, FIG. 2 is a control diagram of the hot water mixing device, FIG. The figure is a sectional view of a conventional hot water mixing control device. 1...Hot water flow path, 2...Water flow path, l8.
... Control means, 21 ... Drive means, 25
...Vibration detection means.