JPS62123513A - Hot and cold water mixing tap - Google Patents

Abstract

PURPOSE:To secure the optimum response speed suited to a flow rate at all times by decreasing and increasing the speed gain when the flow rate is small and large respectively and setting the maximum speed when a temperature error exceeds a prescribed range. CONSTITUTION:A temperature detector 5 and a flow rate detector 6 are provided to a mixing path 4 between a hot water path 1 and a cold water path 2. The output signal of the detector 5 is supplied to a comparator 7 and compared with the output signal of a setter 8 where a desired temperature is set. Then the compared output signal is supplied to a control part 9. The part 9 drives the mixing valves 3a and 3b via a drive part 10 containing a motor, etc. In this case, the part 9 decides the speed gain, i.e., the ratio between a temperature error and the drive speeds of both valves 3a and 3b based on the output signal of the detector 6. At the same time, the valves 3a and 3b are driven based on the output signal of the comparator 7 and in response to said speed gain. While both valves 3a and 3b are driven at the maximum speed when the output signal of the comparator 7 exceeds a prescribed level.

Description

【発明の詳細な説明】 （産業上の利用分野） 未発明は湯と水とを混合させて所望温度の混合湯を得る
ための湯水混合栓の改良に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a hot water mixing faucet for mixing hot water and water to obtain mixed hot water at a desired temperature.

（従来の技術） 従来におけるこの種の混合栓を第３図に示す。(Conventional technology) A conventional mixing faucet of this type is shown in FIG.

図において（１０１）は湯通路、（１０２）は水通路。In the figure, (101) is a hot water passage, and (102) is a water passage.

（１０３ａ）　、　（＋０３ｂ）はこれら湯通路（１０
１）と水通路（１０２）の開度比を調節する混合弁、　
（１０４）は混合弁（１０３ａ）　、　（＋０３ｂ）を
介して流れた湯水を混合して混合湯を得る混合通路であ
る。混合通路（１０４）にはサーミスタ等からなる混合
湯の温度検出器（１０５）が設けられ、この出力信号で
ある温度信号は比較器（１０７）に入力される。この比
較器（１０７）には予じめ所望温度が設定されており、
この設定値と前記温度信号が比較されその差が出力され
る。この出力信号は増幅器（１０９）により増幅されて
モータ等からなる駆動部（２１０）に入力され、駆動部
（１１０）はこの入力信号に基づいて前記混合弁（１０
３ａ）　、　（１０３ｂ）を駆動する。(103a) and (+03b) are these hot water passages (10
1) and a mixing valve that adjusts the opening ratio of the water passage (102);
(104) is a mixing passage that mixes the hot water flowing through the mixing valves (103a) and (+03b) to obtain mixed hot water. The mixing passage (104) is provided with a mixed hot water temperature detector (105) consisting of a thermistor or the like, and the output signal of this temperature signal is input to a comparator (107). A desired temperature is set in advance in this comparator (107),
This set value and the temperature signal are compared and the difference is output. This output signal is amplified by an amplifier (109) and inputted to a drive unit (210) consisting of a motor etc., and the drive unit (110) drives the mixing valve (100) based on this input signal.
3a) and (103b).

第４図はかかる湯水混合栓における温度誤差とモータ駆
動速度の関係を示す図である。温度誤差に対するモータ
速度は略比例し、増幅器の電源電圧等で決まる最大出力
信号にて最高速度となる。FIG. 4 is a diagram showing the relationship between temperature error and motor drive speed in such a hot water mixing faucet. The motor speed is approximately proportional to the temperature error, and the maximum speed is reached at the maximum output signal determined by the power supply voltage of the amplifier.

この比例動作領域（ａ点からｂ点まで）における直線の
傾きが速度ゲインである。The slope of the straight line in this proportional operation region (from point a to point b) is the speed gain.

このように従来では一定の速度ゲインを定め、温度設定
値と検出値の差に比例した速度で駆動部、即ち混合弁の
開度比を調節するようにすることで応答速度を高めてい
る。In this way, in the past, response speed has been increased by setting a constant speed gain and adjusting the opening ratio of the driving section, that is, the mixing valve, at a speed proportional to the difference between the temperature set value and the detected value.

（発明が解決しようとする問題点） ところで、前記速度ゲインはその値が大きい程混合栓の
応答性が高められ、設定温度の混合湯が速く得られるこ
ととなるが、その反面流量によっては制御の安定性が悪
くなり、オーバーシュートやハンチングが生じ易くなる
。(Problem to be Solved by the Invention) By the way, the larger the value of the speed gain, the higher the responsiveness of the mixing faucet, and the faster the mixed water at the set temperature can be obtained, but on the other hand, depending on the flow rate, the control stability becomes worse, and overshoot and hunting are more likely to occur.

この安定性は一般に速度ゲインが一定の場合は流量が多
い程高められ、逆に流量が少ない程低下する。従って流
量が多い場合に安定性を考慮した上で応答性即ち速度ゲ
インを最適値に設定しておけば流星：が低下した場合に
安定性が悪くなり、逆に流量が少ない場合に安定性を考
慮して速度ゲインを最適値に設定しておけば流量が増加
した場合の応答性が前記の場合よりも低下することとな
る。In general, this stability increases as the flow rate increases when the speed gain is constant, and conversely decreases as the flow rate decreases. Therefore, if you take stability into account when the flow rate is high and set the responsiveness, that is, the speed gain, to the optimal value, the stability will worsen if the meteor: decreases, and conversely, the stability will decrease when the flow rate is low. If the speed gain is set to the optimum value in consideration of this, the response when the flow rate increases will be lower than in the above case.

そこで本発明はかかる従来の問題点を解決すべく成され
たものであり、流量に拘らず良好な応答特性と安定性を
得ることができる湯水混合栓を提供するにある。SUMMARY OF THE INVENTION The present invention has been made to solve these conventional problems, and its object is to provide a hot water mixer faucet that can provide good response characteristics and stability regardless of the flow rate.

（問題点を解決するための手段及び作用）この目的を達
成するため本発明は、湯通路（１）と水通路（２）の開
度比を調節する混合弁（３ａ）　。(Means and operations for solving the problem) To achieve this object, the present invention provides a mixing valve (3a) that adjusts the opening ratio of the hot water passage (1) and the water passage (2).

（３ｂ）と、この混合弁（３ａ）、（３ｂ）を駆動させ
る駆動部（１０）と、前記湯通路（１）と水通路（２）
とを合流して混合湯を得る混合通路（４）と、この混合
通路（４）に設けられ混合湯の温度を検出する温度検出
器（５）と、前記混合通路（０に設けられ混合湯の流量
を検出する流量検出器（６）と、混合湯の所望温度を設
定する温度設定器（８）と、この温度設定器（８）と前
記温度検出器（５）の検出信号により双方の温度差を検
出する比較器（７）と、この比較器（７）の出力信号に
基づいて前記駆動部（１０）を作動せしめ、前記温度差
が一定範囲内においては該温度差に比例した速度で前記
混合弁（３ａ）、（３ｂ）を駆動させるとともに、この
比例係数を前記流量検出器（６）の検出信号に応じて定
め、且つ前記温度差が一定範囲外においては前記混合弁
（３ａ）　、　（３ｂ）を瞬時にして最高速度で駆動さ
せる駆動制御部（９）とからなり、流量が小さい場合に
は速度ゲイン（温度誤差と混合弁の駆動速度の比）を小
さく、流量が大きい場合には速度ゲインを大きくすると
ともに、温度誤差が所定範囲外となったときにはその速
度を最高とすることで常時流量に適した最適な応答速度
を得ることができる。(3b), a drive unit (10) that drives the mixing valves (3a) and (3b), and the hot water passage (1) and the water passage (2).
a temperature sensor (5) provided in the mixing passage (4) to detect the temperature of the mixed hot water, and a temperature sensor (5) provided in the mixing passage (0) to obtain the mixed hot water a flow rate detector (6) that detects the flow rate of the mixed hot water; a temperature setting device (8) that sets the desired temperature of the mixed hot water; and a temperature setting device (8) that sets the desired temperature of the mixed hot water. A comparator (7) that detects a temperature difference, and a drive unit (10) that operates based on the output signal of the comparator (7), and operates at a speed proportional to the temperature difference when the temperature difference is within a certain range. The mixing valves (3a) and (3b) are driven at the same time as the proportional coefficient is determined according to the detection signal of the flow rate detector (6), and when the temperature difference is outside a certain range, the mixing valve (3a) ) and (3b) at the maximum speed instantly, and when the flow rate is small, the speed gain (ratio of temperature error and driving speed of the mixing valve) is small, and when the flow rate is large, the speed gain (ratio of temperature error and driving speed of the mixing valve) is small. In this case, the optimum response speed suitable for the constant flow rate can be obtained by increasing the speed gain and setting the speed to the maximum when the temperature error falls outside the predetermined range.

（実施例） 以下に本発明の好適実施例を添付図面に基づいて説明す
る。(Embodiments) Preferred embodiments of the present invention will be described below based on the accompanying drawings.

第１図は本発明に係る湯水混合栓を示す構成図である。FIG. 1 is a configuration diagram showing a hot water mixing faucet according to the present invention.

図において、（１）は不図示のボイラタンク等に連絡さ
れた湯通路、（２）は水道水等が供給される水通路、（
３ａ）、（３ｂ）はこれら湯通路（１）と水通路（２）
の開度比を調節する混合弁、（４）は混合弁（３ａ）、
（３ｂ）を介して流れた湯水を混合して混合湯を得る混
合通路である。この混合通路（４）にはサーミスタ等か
らなる温度検出ｋ（５）とともにこの流量を検出する流
量検出器（８）が設けられる。In the figure, (1) is a hot water passage connected to a boiler tank (not shown), (2) is a water passage through which tap water, etc. is supplied, (
3a) and (3b) are these hot water passage (1) and water passage (2)
A mixing valve (4) is a mixing valve (3a) that adjusts the opening ratio of
(3b) is a mixing passage that mixes hot water flowing through the passageway to obtain mixed hot water. This mixing passage (4) is provided with a temperature detector k (5) consisting of a thermistor or the like and a flow rate detector (8) for detecting this flow rate.

前記温度検出器（５）の出力信号は比較器（７）に入力
され、ここで所望温度が設定された設定器（８）の出力
信号と比較され、その出力信号は制御部（９）に入力せ
しめられる。この制御部（８）はモータ等からなる駆動
部（１０）を介して混合弁を駆動させるに際し、前記流
量検出器（６）による出力信号に基づきその速度ゲイン
を決定するとともに、前記比較器（７）の出力信号に基
づき該速度ゲインに応じた駆動速度で混合弁（３ａ）　
、　（３ｂ）を駆動させるとともに、比較器（７）の出
力信号の値が所定値以上となったときには混合弁（３ａ
）　、　（３ｂ）を最高速度にて駆動せしめるものであ
る。The output signal of the temperature detector (5) is input to a comparator (7), where it is compared with the output signal of the setting device (8), in which the desired temperature is set, and the output signal is sent to the control unit (9). You will be prompted to enter the information. When driving the mixing valve via a drive unit (10) consisting of a motor or the like, this control unit (8) determines its speed gain based on the output signal from the flow rate detector (6), and also determines the speed gain of the mixing valve based on the output signal from the flow rate detector (6). Based on the output signal of 7), the mixing valve (3a) is operated at a driving speed corresponding to the speed gain.
, (3b), and when the value of the output signal of the comparator (7) exceeds a predetermined value, the mixing valve (3a) is activated.
) and (3b) are driven at maximum speed.

第２図は本混合栓における温度誤差（設定値−実測値）
と駆動速度の関係を示したもので、温度誤差を横軸に駆
動速度を縦軸にとって示す。Figure 2 shows the temperature error in this mixing faucet (set value - actual measured value)
This graph shows the relationship between the temperature error and the driving speed, with the horizontal axis representing the temperature error and the driving speed representing the vertical axis.

温度誤差が零付近（Ｃ＋−Ｃ２間）においては混合弁（
３ａ）、（３ｂ）は駆動されないが、それ以上の値（ｃ
＋−ｄｔ聞及びｃｔ−ｄ２間）においてはそのときの流
量に応じて決定される速度ゲインにより駆動される。こ
の速度ゲインは流量に応じて２種の値が用意されており
、流量が所定値より大きい場合には大きい速度ゲイン（
１２）が、所定値より小さい場合には小さい速度ゲイン
（１３）が制御部（９）内で選択される。When the temperature error is near zero (between C+ and C2), the mixing valve (
3a) and (3b) are not driven, but a higher value (c
+-dt and ct-d2), it is driven by a speed gain determined according to the flow rate at that time. Two types of values are prepared for this speed gain depending on the flow rate, and when the flow rate is larger than a predetermined value, a larger speed gain (
12) is smaller than a predetermined value, a smaller speed gain (13) is selected in the control section (9).

そして温度誤差がさらに大きくなり、６２以上、あるい
はｄｌ以下となった場合は、駆動速度は瞬時に最大速度
となり、応答速度をより高めることができるように構成
される。If the temperature error becomes even larger and becomes 62 or more or dl or less, the drive speed instantly becomes the maximum speed, and the configuration is such that the response speed can be further increased.

こうして本実施例によれば、流量に応じて予じめ用意さ
れた２種の速度ゲインの内いずれかより適するものを選
択し、その速度ゲインにより温度誤差に基づいた混合弁
駆動速度を決定するようにしたため、従来に比し、応答
性及び安定性に優れた湯水混合栓を提供することができ
る。In this way, according to this embodiment, one of the two speed gains prepared in advance is selected depending on the flow rate, and the mixing valve drive speed based on the temperature error is determined by the speed gain. As a result, it is possible to provide a hot water mixing faucet with excellent responsiveness and stability compared to conventional ones.

尚、本発明は実施例に限定されることはなく、この発明
の技術的思想の範囲内において、各種の他の実施態様及
び実施態様が可能であり、例えば用意する速度ゲインの
値は２種に限る必要はなく、もっと多種の値を用意する
ようにしてもよい。Note that the present invention is not limited to the embodiments, and various other embodiments and embodiments are possible within the scope of the technical idea of the present invention. For example, two types of speed gain values may be prepared. It is not necessary to limit the value to , and a wider variety of values may be provided.

（発明の効果） 以上の説明より明らかな如く本発明によれば、流量が小
さい場合には速度ゲイン（温度誤差と混合弁の駆動速度
の比）を小さく、流量が大きい場合には速度ゲインを大
きくするとともに、温度誤差が所定範囲外となったとき
にはその速度を最高とすることで常時流量に適した最適
な応答速度を得ることができる。(Effects of the Invention) As is clear from the above explanation, according to the present invention, when the flow rate is small, the speed gain (ratio of temperature error and driving speed of the mixing valve) is reduced, and when the flow rate is large, the speed gain is reduced. By increasing the speed and increasing the speed to the maximum when the temperature error falls outside the predetermined range, an optimal response speed suitable for a constant flow rate can be obtained.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明に係る湯水混合栓を示す構成図、第２図
は混合栓における温度誤差と駆動速度の関係を示す図、
第３図、第４図は従来の技術を示す図である。 そして図面中、（１）は湯通路、（２）は水通路、（３
ａ）、（３ｂ）は混合弁、（４）は混合通路、（５）は
温度検出器、（６）は流量検出器、（７）は比較器、（
８）は設定器、（９）は制御部、（ｌＯ）は駆動部であ
る。FIG. 1 is a configuration diagram showing a hot water mixing faucet according to the present invention, and FIG. 2 is a diagram showing the relationship between temperature error and driving speed in the mixing faucet.
FIGS. 3 and 4 are diagrams showing conventional techniques. In the drawing, (1) is a hot water passage, (2) is a water passage, and (3) is a water passage.
a), (3b) are mixing valves, (4) are mixing passages, (5) are temperature detectors, (6) are flow rate detectors, (7) are comparators, (
8) is a setting device, (9) is a control section, and (lO) is a drive section.

Claims (1)

【特許請求の範囲】[Claims] 湯通路と水通路の開度比を調節する混合弁と、この混合
弁を駆動させる駆動部と、前記湯通路と水通路とを合流
して混合湯を得る混合通路と、この混合通路に設けられ
混合湯の温度を検出する温度検出器と、前記混合通路に
設けられ混合湯の流量を検出する流量検出器と、混合湯
の所望温度を設定する温度設定器と、この温度設定器と
前記温度検出器の検出信号により双方の温度差を検出す
る比較器と、この比較器の出力信号に基づいて前記駆動
部を作動せしめ、前記温度差が一定範囲内においては該
温度差に比例した速度で前記混合弁を駆動させるととも
に、この比例係数を前記流量検出器の検出信号に応じて
定め、且つ前記温度差が一定範囲外においては前記駆動
弁を瞬時にして最高速度で駆動させる駆動制御部とから
なることを特徴とする湯水混合栓。A mixing valve that adjusts the opening ratio of the hot water passage and the water passage, a drive unit that drives the mixing valve, a mixing passage that merges the hot water passage and the water passage to obtain mixed hot water, and a mixing passage provided in the mixing passage. a temperature detector for detecting the temperature of the mixed hot water; a flow rate detector provided in the mixing passage for detecting the flow rate of the mixed hot water; a temperature setting device for setting a desired temperature of the mixed hot water; a comparator that detects the temperature difference between the two sides using a detection signal from a temperature detector; and a comparator that operates the drive unit based on the output signal of the comparator, and operates at a speed proportional to the temperature difference when the temperature difference is within a certain range. a drive control unit that drives the mixing valve at a speed, determines the proportional coefficient according to a detection signal of the flow rate detector, and instantaneously drives the driving valve at a maximum speed when the temperature difference is outside a certain range; A hot water mixing faucet characterized by consisting of.