JP5004673B2 - Mixing valve - Google Patents

Mixing valve Download PDF

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JP5004673B2
JP5004673B2 JP2007144494A JP2007144494A JP5004673B2 JP 5004673 B2 JP5004673 B2 JP 5004673B2 JP 2007144494 A JP2007144494 A JP 2007144494A JP 2007144494 A JP2007144494 A JP 2007144494A JP 5004673 B2 JP5004673 B2 JP 5004673B2
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water inlet
hot water
valve body
opening
valve
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JP2008298164A (en
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雅也 佐藤
史宏 鈴木
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Fujikoki Corp
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Description

本発明は、混合弁に係り、特に、水と湯を混合して所望の混合比率の温水を得るための給湯装置等に使用するのに好適な混合弁に関する。   The present invention relates to a mixing valve, and more particularly to a mixing valve suitable for use in a hot water supply apparatus or the like for mixing hot water and hot water to obtain hot water having a desired mixing ratio.

この種の混合弁として、従来より、弁本体と、該弁本体内に回動可能に嵌挿された概略円筒状の弁体と、該弁体を回動させる駆動手段とを備え、前記弁本体に水導入口（継手）及び湯導入口（継手）を設けるとともに、前記弁体の周壁部に、前記水導入口及び湯導入口の開口面積を連続的に変化させるべく水用の第１開口部及び湯用の第２開口部を設け、もって、前記弁体を回動させることにより水と湯の混合比率を調整するようにした混合弁が知られている。   Conventionally, this type of mixing valve includes a valve body, a substantially cylindrical valve body that is rotatably fitted in the valve body, and a drive unit that rotates the valve body. A water introduction port (joint) and a hot water introduction port (joint) are provided in the main body, and a first water-use inlet is provided on the peripheral wall portion of the valve body to continuously change the opening area of the water introduction port and the hot water introduction port. There is known a mixing valve that is provided with an opening and a second opening for hot water, so that the mixing ratio of water and hot water is adjusted by rotating the valve body.

このような混合弁が用いられる給湯装置においては、通常、水道水等を分岐させて一方をそのまま水導入口へ、他方を熱交換器（加熱器）で加熱して、つまり水から湯に変えて湯導入口に導くようにされるが、その構成上、次のような考慮すべき課題がある。   In a hot water supply apparatus using such a mixing valve, tap water is usually branched and one is directly heated to a water inlet, and the other is heated by a heat exchanger (heater), that is, water is changed to hot water. However, due to its configuration, there are the following issues to consider.

すなわち、例えば、使用される水が極めて低温である寒冷時においては、湯導入口を全開、水導入口を全閉として、熱交換器により加熱された湯のみを導出口から送り出すようにしても、熱交換器による加熱力に限界があることから、得られる温水が所望温度にならないことがある。また、それとは別に、例えば、深夜電力を利用して加熱した温水をタンク内に貯留しておくようにされた給湯システムにおいて、タンク内に温水が残っていないとき等には、瞬間湯沸かし器のように水を迅速に昇温させたい場合がある。   That is, for example, in cold weather when the water used is extremely low, the hot water inlet is fully open, the water inlet is fully closed, and only the hot water heated by the heat exchanger is sent out from the outlet. Since the heating power by the heat exchanger is limited, the obtained hot water may not reach the desired temperature. In addition, for example, in a hot water supply system in which hot water heated using midnight power is stored in a tank, when there is no hot water remaining in the tank, a hot water heater is used. Sometimes it is desirable to quickly raise the temperature of water.

かかる場合、所望温度の温水を得るには、熱交換器を通る水量を少なくすればよいが、これには熱交換器を通る水量調整用の流量調整弁等が必要となり、装置コストが上昇する等の問題がある。   In such a case, in order to obtain hot water at a desired temperature, the amount of water passing through the heat exchanger may be reduced. However, this requires a flow rate adjustment valve for adjusting the amount of water passing through the heat exchanger, and the cost of the apparatus increases. There are problems such as.

そこで、下記特許文献１、２には、前記した如くの、水と湯の混合比率を調整する混合弁に、水導入口を全閉状態にしたもとで、湯の流量（混合弁から送り出される湯量）のみを調整（絞ることが）できるようにしたものが開示されている。   Therefore, in Patent Documents 1 and 2 below, the mixing valve for adjusting the mixing ratio of water and hot water as described above, with the water introduction port fully closed, The amount of water that can be adjusted (squeezed) is disclosed.

特開2002-22039号公報Japanese Patent Laid-Open No. 2002-22039 特開平11-287337号公報Japanese Patent Laid-Open No. 11-287337

しかしながら、前記特許文献１に所載の混合弁では、弁本体の水導入口と湯導入口並びに弁体の第１開口部と第２開口部は、それぞれ湯水流下方向（弁体の回転軸線）に沿って段違いとなるように配置されているので、弁が縦方向に長くなり、大型化（配管系を含めた占有スペースの増大）、重量増等を招くとともに、弁本体や弁体等の成形精度が低下し、弁本体と弁体の表面積（接触面積）の増加や偏接触等による弁体を回転させる際の負荷（トルク）の増大、異物による悪影響（詰まり等による作動不良）の増加、クリアランスが大きくなることによる締め切り時の漏れ量の増大等を招来するおそれがあった。   However, in the mixing valve described in Patent Document 1, the water inlet and the hot water inlet of the valve main body, and the first opening and the second opening of the valve body are respectively in the hot water flow downward direction (rotating axis of the valve body). The valve is lengthened in the vertical direction, leading to an increase in size (an increase in occupied space including the piping system), an increase in weight, etc., as well as the valve body and valve body, etc. Reduced molding accuracy, increased surface area (contact area) between valve body and valve body, increased load (torque) when rotating the valve body due to uneven contact, etc., increased adverse effects due to foreign matter (operation failure due to clogging etc.) Further, there is a risk of increasing the leakage amount at the deadline due to an increase in clearance.

また、前記特許文献２に所載の混合弁は、弁本体及び弁体に弁座や弁体部等を増設する必要があるので、混合弁（弁本体や弁体）の構造が複雑なものとなり、加工組立等に手間がかかり、装置コストが上昇する等の問題がある。   In addition, the mixing valve described in Patent Document 2 has a complicated structure of the mixing valve (valve body and valve body) because it is necessary to add a valve seat and a valve body part to the valve body and the valve body. Thus, there is a problem that it takes time and labor for processing and assembly, and the cost of the apparatus increases.

そこで、本願の発明者等は、大型化、重量増等を招くことなく、前記提案の混合弁と同様な機能（水と湯の混合機能及び湯量（のみの）絞り機能）が得られるように、水導入口及び湯導入口並び第１開口部及び第２開口部を同一平面上に設けることを検討している。   Therefore, the inventors of the present application can obtain the same functions (mixing function of water and hot water and the function of restricting the amount of hot water) without causing an increase in size, an increase in weight, or the like. It is considered to provide the water inlet and the hot water inlet, the first opening and the second opening on the same plane.

しかしながら、例えば、図１０に例示される如くに、弁本体１０に水導入口１１及び湯導入口１２を、また、円筒状の弁体２０の周壁部２２に、例えば前記水導入口１１と湯導入口１２の口径Ｌと略等しい横幅（周方向長）を有する側面視矩形の第１開口部３１及び第２開口部３２を、それぞれ同一平面上に設ける場合、普通の方策では、水と湯の混合調量は可能であるが、湯量のみを絞ること、つまり、弁体２０により水導入口１１を全閉にした状態で、湯導入口１２の開口面積を弁体２０の回転角度に従いつつ最大から最小まで連続的に変化させることはできない。   However, for example, as illustrated in FIG. 10, the water inlet 11 and the hot water inlet 12 are provided in the valve main body 10, and the water inlet 11 and the hot water are provided in the peripheral wall portion 22 of the cylindrical valve body 20, for example. When the first opening portion 31 and the second opening portion 32 having a lateral width (circumferential length) substantially equal to the diameter L of the introduction port 12 are provided on the same plane, water and hot water are used in a normal manner. However, only the amount of hot water is squeezed, that is, while the water inlet 11 is fully closed by the valve body 20, the opening area of the hot water inlet 12 is adjusted according to the rotation angle of the valve body 20. It cannot be changed continuously from maximum to minimum.

詳細には、図１０（Ａ）に示される如くに、水導入口１１の開口面積が最大、かつ、湯導入口１２の開口面積が最小（０＝全閉）となる弁体２０の位置を初期位置として、該初期位置から弁体２０を一方向に回転させた場合、その回転角度に従って、水導入口の開口面積（流量）が減少するとともに、湯導入口の開口面積（流量）が増大し、（Ｂ）に示される如くに、水導入口１１と湯導入口１２の開口面積（流量）が同じとなって混合比率が５０％：５０％となり、さらに、弁体２０を同じ方向に回転させると、（Ｃ）に示される如くに、水導入口の開口面積（流量）が漸減して０（全閉）となるとともに、湯導入口の開口面積（流量）が漸増して最大となる。   Specifically, as shown in FIG. 10A, the position of the valve body 20 where the opening area of the water inlet 11 is the maximum and the opening area of the hot water inlet 12 is the minimum (0 = fully closed). When the valve body 20 is rotated in one direction from the initial position as the initial position, the opening area (flow rate) of the water inlet decreases and the opening area (flow rate) of the hot water inlet increases according to the rotation angle. As shown in (B), the opening area (flow rate) of the water inlet 11 and the hot water inlet 12 is the same, the mixing ratio is 50%: 50%, and the valve body 20 is placed in the same direction. When rotated, the opening area (flow rate) of the water inlet gradually decreases to 0 (fully closed) and the opening area (flow rate) of the hot water inlet gradually increases as shown in (C). Become.

ところが、この状態から、さらに、弁体２０を同じ方向に回転させても、（Ｄ）、（Ｅ）、（Ｆ）に示される如くに、水導入口１１を全閉状態にしたまま、湯導入口１２の開口面積を弁体２０の回転角度に従いつつ最大から最小まで連続的に変化させることはできない。   However, from this state, even when the valve body 20 is further rotated in the same direction, as shown in (D), (E), and (F), the water inlet 11 is kept fully closed, as shown in FIGS. The opening area of the inlet 12 cannot be continuously changed from the maximum to the minimum while following the rotation angle of the valve body 20.

そこで、本願の発明者等は、図９に例示される如くに、弁体２０に一つだけ開口部３０を設けることを検討している。   Therefore, the inventors of the present application are considering providing only one opening 30 in the valve body 20 as illustrated in FIG. 9.

しかしながら、このように弁体２０に一つだけ開口部３０を設ける場合においても、普通の方策では、次のような理由から、水と湯の混合機能に加えて湯量絞り機能を付加することはできない。   However, even when only one opening 30 is provided in the valve body 20 as described above, it is not possible to add a hot water amount throttling function in addition to a water / hot water mixing function for the following reasons. Can not.

すなわち、水導入口１１、湯導入口１２が同一平面上で対向配置されているとき、当該混合弁の特性は、弁体２０の外径ｄ、弁本体１０の内径Ｄ（ｄとＤは略等しい）、開口部３０の開口幅ｈ、水導入口１１の開口幅Ｈ、及び、湯導入口１２の開口幅Ｈ’により決定される。   That is, when the water inlet 11 and the hot water inlet 12 are arranged opposite to each other on the same plane, the characteristics of the mixing valve are that the outer diameter d of the valve body 20 and the inner diameter D of the valve body 10 (d and D are substantially omitted). Equal), the opening width h of the opening 30, the opening width H of the water inlet 11, and the opening width H ′ of the hot water inlet 12.

いま、水導入口１１及び湯導入口１２の一端側の端縁部をＰ、Ｑ、他端側の端縁部をＲ、Ｓ、弁体２０の回転方向に沿ったＰ−Ｑ間の角度（閉塞幅）をＡ、弁体２０の回転方向に沿ったＲ−Ｓ間の角度（閉塞幅）をＢとすれば、混合機能を得るためには、前記角度Ｂは、前記開口幅ｈに相当する角度Ｃより小さいことが必要である。   Now, one end side edge of the water inlet 11 and the hot water inlet 12 is P, Q, the other end is R, S, and the angle between PQ along the rotation direction of the valve body 20. If the (occlusion width) is A and the angle between RS along the rotation direction of the valve body 20 (occlusion width) is B, the angle B is set to the opening width h to obtain a mixing function. It is necessary to be smaller than the corresponding angle C.

条件（１）・・・Ｂ＜Ｃ   Condition (1) ... B <C

また、湯量絞り機能を付加するには、前記角度Ａは、前記開口幅ｈに相当する角度Ｃより大きいことが必要である。   In addition, in order to add the hot water amount drawing function, the angle A needs to be larger than the angle C corresponding to the opening width h.

条件（２）・・・Ａ＞Ｃ   Condition (2) ... A> C

しかし、図示例のように、水導入口１１、湯導入口１２が同一平面上で対向配置されている場合、Ａ＝Ｂとなる。そのため、上記条件（１）、（２）を同時に満たすことはできず、したがって、水と湯の混合機能に加えて湯量絞り機能を付加することはできない。   However, when the water inlet 11 and the hot water inlet 12 are opposed to each other on the same plane as in the illustrated example, A = B. Therefore, the above conditions (1) and (2) cannot be satisfied at the same time. Therefore, in addition to the mixing function of water and hot water, the hot water amount throttling function cannot be added.

本発明は、上記事情に鑑みてなされたもので、その目的とするところは、大型化、重量増、成形精度の低下等を招くことなく、また、回転負荷の増大、作動不良の増加、漏れ量の増大等も招来することなく、水と湯を混合して迅速かつ正確に所望温度及び流量の温水を得ることができるとともに、水導入口を全閉にした状態で、湯量（のみ）を合理的に絞ることのできる、コンパクトで安価で有用な混合弁を提供することにある。   The present invention has been made in view of the above circumstances, and the object thereof is not to increase the size, increase the weight, decrease the molding accuracy, etc., and increase the rotational load, increase the malfunction, and leak. Water and hot water can be mixed quickly and accurately without causing an increase in volume, etc., and hot water (only) can be obtained with the water inlet fully closed. The object is to provide a compact, inexpensive and useful mixing valve that can be reasonably throttled.

前記の目的を達成すべく、本発明に係る混合弁は、基本的には、水導入口が形成された水入口継手及び湯導入口が形成された湯入口継手が実質的に同一平面上に設けられるとともに、該水導入口及び湯導入口の下流側に導出口が設けられた弁本体と、該弁本体内に回動可能に嵌挿され、その周壁部に前記水導入口及び湯導入口の開口面積を回転角度に従って連続的に変化させるべく水用開口部及び湯用開口部が設けられた概略円筒状の弁体とを備える。   In order to achieve the above object, the mixing valve according to the present invention basically has a water inlet joint formed with a water inlet and a hot water inlet joint formed with a hot water inlet on substantially the same plane. A valve main body provided with a outlet port on the downstream side of the water inlet port and the hot water inlet port, and is rotatably inserted into the valve main body, and the water inlet port and the hot water inlet port are inserted into the peripheral wall portion thereof. A substantially cylindrical valve body provided with an opening for water and an opening for hot water to continuously change the opening area of the mouth according to the rotation angle.

そして、前記水入口継手及び湯入口継手が断面円形とされ、前記水導入口及び湯導入口が半月ないし三日月状とされており、前記弁体により前記水導入口を全閉にした状態で、前記湯導入口の開口面積を前記弁体の回転角度に従いつつ最大から最小まで連続的に変化させるべく、前記水導入口及び湯導入口並びに前記水用開口部及び湯用開口部が、前記弁体の回転軸線に沿って段違いとなるように配在されている。
And, the water inlet joint and the hot water inlet joint are circular in cross section, the water inlet and the hot water inlet are in a half-moon or crescent shape, and the water inlet is fully closed by the valve body, In order to continuously change the opening area of the hot water inlet from the maximum to the minimum while following the rotation angle of the valve body, the water inlet, the hot water inlet, the water opening, and the hot water opening are the valve. are Zaisa distribution such that staggered along the body axis of rotation.

さらに、前記水導入口の開口面積が最大、かつ、前記湯導入口の開口面積が最小となる前記弁体の位置を初期位置として、該初期位置から前記弁体を一方向に所定角度回転させると、前記水導入口の開口面積が漸減して０となるとともに、前記湯導入口の開口面積が漸増して最大となり、この状態から前記弁体をさらに同じ方向に所定角度回転させると、前記水導入口が全閉状態のまま、前記湯導入口の開口面積が漸減して最小となるように構成されることを特徴としている。
 Further, the position of the valve body where the opening area of the water introduction port is the maximum and the opening area of the hot water introduction port is the minimum is set as the initial position, and the valve body is rotated in a direction by a predetermined angle from the initial position. And the opening area of the water inlet gradually decreases to 0, and the opening area of the hot water inlet gradually increases to the maximum, and when the valve body is further rotated by a predetermined angle in the same direction, It is characterized in that the opening area of the hot water inlet is gradually reduced to a minimum while the water inlet is fully closed .

本発明に係る混合弁では、弁体には水用開口部及び湯用開口部が、また、水入口継手及び湯入口継手には水導入口及び湯導入口が、それぞれ前記弁体の回転軸線に沿って段違いとなるように配在されているので、大型化、重量増、成形精度の低下等を招くことなく、また、回転負荷の増大、作動不良の増加、漏れ量の増大等も招来することなく、水と湯を混合して迅速かつ正確に所望温度及び流量の温水を得ることができるとともに、水導入口を全閉にした状態で、湯量（のみ）を合理的に絞ることができ、その結果、コンパクトで安価で有用な混合弁を提供することが可能となる。   In the mixing valve according to the present invention, the valve body has a water opening and a hot water opening, and the water inlet joint and the hot water inlet joint have a water inlet and a hot water inlet, respectively. Are arranged so as to be stepped along each other, so that there is no increase in size, weight increase, reduction in molding accuracy, etc., and also an increase in rotational load, an increase in malfunction, an increase in leakage, etc. Without mixing, water and hot water can be mixed quickly and accurately to obtain hot water at the desired temperature and flow rate, and the amount of hot water (only) can be rationally reduced with the water inlet fully closed. As a result, it is possible to provide a compact, inexpensive and useful mixing valve.

以下、本発明の混合弁の実施形態を図面を参照しながら説明する。   Hereinafter, embodiments of the mixing valve of the present invention will be described with reference to the drawings.

図１は、本発明に係る混合弁の一実施形態を示す部分切欠縦断面図である。   FIG. 1 is a partially cutaway longitudinal sectional view showing an embodiment of a mixing valve according to the present invention.

図示実施形態の混合弁１は、例えば、水と湯を混合して所望温度の温水を得るための給湯装置等に使用されるもので、断面円形の弁室１４を有し、該弁室１４の側部に連なって水入口継手１１Ａ及び湯入口継手１２Ａが設けられるとともに、弁室１４の下部に連なって導出口（継手）１３が設けられた弁本体１０と、該弁本体１０の弁室１４内に嵌挿されて回転軸線Ｏ回り回動可能とされた弁体２０と、該弁体２０を回動させる駆動手段としてのステッピングモータ（図示省略）を備えている。   The mixing valve 1 of the illustrated embodiment is used in, for example, a hot water supply device for mixing hot water and hot water to obtain hot water having a desired temperature, and has a valve chamber 14 having a circular cross section. The valve body 10 is provided with a water inlet joint 11 </ b> A and a hot water inlet joint 12 </ b> A connected to the side of the valve body 10, and provided with a lead-out port (joint) 13 connected to the lower part of the valve chamber 14, and the valve chamber of the valve body 10. 14 is provided with a valve body 20 that is fitted in 14 and is rotatable about a rotation axis O, and a stepping motor (not shown) as a drive means for rotating the valve body 20.

前記水入口継手１１Ａと湯入口継手１２Ａは、同一平面上で１８０度の角度間隔をあけて対向配置され、この水入口継手１１Ａ内の上半部に断面半月状（半円より小）の水導入口１１［図２の（Ｂ）参照］が、また、湯入口継手１２Ａの下半部に断面半月状（半円より小）の湯導入口１２［図２の（Ａ）参照］がそれぞれ弁体２０の回転軸線Ｏに沿って段違いとなるように形成されている。   The water inlet joint 11A and the hot water inlet joint 12A are arranged to face each other at an angular interval of 180 degrees on the same plane, and water having a half-moon cross section (smaller than a semicircle) is formed in the upper half of the water inlet joint 11A. The inlet 11 [see FIG. 2 (B)], and the hot water inlet 12 [see (A) of FIG. 2] having a half-moon cross section (smaller than a semicircle) in the lower half of the hot water inlet joint 12A. It is formed so as to be stepped along the rotation axis O of the valve body 20.

また、弁本体１０内における前記水入口継手１１Ａ及び湯入口継手１Ａの中心線Ｃａより下側（弁室１４下部及び導出口１３上部）には、湯と水の混合を促進するための攪拌部４０が一体に設けられている。この攪拌部４０は、図１に加えて図３（弁本体１０の水平断面図）を参照すればよくわかるように、前記弁室１４の中心線（前記回転軸線Ｏ）上に配置された円柱状部４２、この円柱状部４２の下部と導入口１３の内壁とを連結する、１２０度間隔で配在された３個の矩形状の連結板部４３、及び、前記円柱状部４２の外周で前記連結板部４３の上部に連設された３枚の突出板部４４を有している。この３枚の突出板部４４は、１２０度の角度間隔をあけて前記円柱状部４２から半径方向に放射状に突出せしめられ、その半径方向の突出長が下方程長い側面視直角三角形状とされ、その底辺が前記弁室１４の内周面に達するようになっている。また、前記円柱状部４２には、後述する弁体支軸３８の下部が嵌挿される穴４６が形成されている。   A stirring portion for promoting mixing of hot water and water is provided below the center line Ca of the water inlet joint 11A and the hot water inlet joint 1A in the valve body 10 (lower part of the valve chamber 14 and upper part of the outlet 13). 40 is provided integrally. As can be understood by referring to FIG. 3 (horizontal sectional view of the valve body 10) in addition to FIG. 1, the stirring unit 40 is a circle disposed on the center line (the rotation axis O) of the valve chamber 14. The columnar part 42, three rectangular connecting plate parts 43 arranged at intervals of 120 degrees that connect the lower part of the cylindrical part 42 and the inner wall of the inlet 13, and the outer periphery of the cylindrical part 42 The three protruding plate portions 44 connected to the upper portion of the connecting plate portion 43 are provided. The three projecting plate portions 44 are projected radially from the cylindrical portion 42 at an angular interval of 120 degrees, and the projecting length in the radial direction is a triangular shape in a right-angled view as viewed from the side. The bottom side reaches the inner peripheral surface of the valve chamber 14. The columnar portion 42 is formed with a hole 46 into which a lower portion of a valve body support shaft 38 to be described later is fitted.

一方、前記弁体２０は、図５に示される如くに、概略天井部付き円筒状とされ、その周壁部２２が、前記水導入口１１及び湯導入口１２を閉塞するシール面部として機能するようにされ、かつ、前記周壁部２２に、水導入口１１及び湯導入口１２の開口面積を弁体２０の回転角度に従って連続的に変化させるべく、その上部側に側面視矩形の水用開口部３１が、また、その下部側に側面視矩形の湯用開口部３２が設けられている。この水用開口部３１及び湯用開口部３２は、図４に加えて図６の簡略図を参照すればよくわかるように、回転方向に沿って角度Ｃ、Ｃ’分開口せしめられるとともに、回転方向に沿って相互に角度ｋ（開口中心線ａ−ｂ間の角度間隔で、例えば６０度〜８０度）分ずらされている。   On the other hand, as shown in FIG. 5, the valve body 20 has a substantially cylindrical shape with a ceiling portion, and the peripheral wall portion 22 functions as a seal surface portion that closes the water inlet 11 and the hot water inlet 12. In addition, in order to continuously change the opening area of the water inlet 11 and the hot water inlet 12 in accordance with the rotation angle of the valve body 20 in the peripheral wall portion 22, a rectangular water opening is formed on the upper side thereof. 31 is provided with a rectangular hot water opening 32 in a side view. The water opening 31 and the hot water opening 32 are opened by an angle C and C ′ along the rotation direction, as can be understood by referring to the simplified diagram of FIG. 6 in addition to FIG. They are shifted from each other by an angle k (an angular interval between the opening center lines ab, for example, 60 degrees to 80 degrees) along the direction.

また、弁体２０の天井部２３の上面中央には、回転連結軸２５が突設されている。この回転連結軸２５の下部には、Ｏリング２９、２９（図１）が装着される、３段の鍔状部２８からなる溝が設けられ、その上部には、ステッピングモータと一体回転可能に連結するためのスプライン軸部２６及び非円形断面（Ｄカット形状等）の凸部２７が設けられている。また、弁体２０の下部には、弁室１４の内周面との間をシールするためのリング状弾性シール部材３９（図１）が装着される溝３６が設けられている。また、弁体２０における水用開口部３１と湯用開口部３２との間にも、弁室１４の内周面と（水用開口部３１と湯用開口部３２と）の間をシールするためのリング状弾性シール部材３９’（図１）が装着される溝３６’が設けられている。   In addition, a rotary connecting shaft 25 projects from the center of the upper surface of the ceiling portion 23 of the valve body 20. In the lower part of the rotary connecting shaft 25, a groove comprising a three-stage bowl-shaped part 28 to which O-rings 29 and 29 (FIG. 1) are attached is provided, and an upper part thereof can be rotated integrally with the stepping motor. A spline shaft portion 26 for connection and a convex portion 27 having a non-circular cross section (D cut shape or the like) are provided. In addition, a groove 36 in which a ring-shaped elastic seal member 39 (FIG. 1) for sealing between the inner periphery of the valve chamber 14 is mounted is provided in the lower part of the valve body 20. Further, the space between the inner peripheral surface of the valve chamber 14 and the water opening 31 and the hot water opening 32 is also sealed between the water opening 31 and the hot water opening 32 in the valve body 20. A groove 36 ′ is provided in which a ring-shaped elastic seal member 39 ′ (FIG. 1) is mounted.

弁本体１０の上部には、弁体２０の天井部２３と回転連結軸２５の下部（Ｏリング２９、２９が装着されている部分）を回転自在に支持する軸受１６が固定され、この軸受１６上に取付板を介して前記ステッピングモータが取り付けられる。   A bearing 16 that rotatably supports the ceiling portion 23 of the valve body 20 and the lower portion of the rotary connecting shaft 25 (portions where the O-rings 29 and 29 are mounted) is fixed to the upper portion of the valve body 10. The stepping motor is mounted on the top via a mounting plate.

また、前記回転連結軸２５を含む弁体２０の上部中央には、弁体支軸３８の上部が圧入固定される穴３７が設けられ、前記弁体支軸３８の下部は前記円柱状部４２に設けられた穴４６に回転自在に嵌挿されている。   In addition, a hole 37 in which the upper portion of the valve body support shaft 38 is press-fitted and fixed is provided in the upper center of the valve body 20 including the rotary connecting shaft 25, and the lower portion of the valve body support shaft 38 is formed in the cylindrical portion 42. Is rotatably inserted in a hole 46 provided in.

ここで、本実施形態の混合弁１では、弁体２０には水用開口部３１及び湯用開口部３２が、また、水入口継手１１Ａ及び湯入口継手１２Ａには水導入口１１及び湯導入口１２が、それぞれ前記弁体２０の回転軸線Ｏに沿って段違いとなるように配在されているので、水と湯の混合機能に加えて湯量絞り機能を付加することができる。   Here, in the mixing valve 1 of the present embodiment, the valve body 20 has a water opening 31 and a hot water opening 32, and the water inlet joint 11A and the hot water inlet joint 12A have a water inlet 11 and hot water introduction. Since the mouths 12 are arranged so as to be stepped along the rotation axis O of the valve body 20, a hot water amount throttling function can be added in addition to the water and hot water mixing function.

すなわち、前述した図９に示されるものと同様に、本実施形態の混合弁１においても、図６に簡略図で示されているように、弁体２０の外径ｄ、弁本体１０の内径Ｄ（ｄとＤは略等しい）、水用開口部３１の開口幅ｈ、湯用開口部３２の開口幅ｈ’、水導入口１１の開口幅Ｈ、及び、湯導入口１２の開口幅Ｈ’とし、また、水導入口１１及び湯導入口１２の一端側の端縁部をＰ、Ｑ、他端側の端縁部をＲ、Ｓ、弁体２０の回転方向に沿ったＰ−Ｑ間の角度（閉塞幅）をＡ、弁体２０の回転方向に沿ったＲ−Ｓ間の角度（閉塞幅）をＢ、水用開口部３１及び湯用開口部３２の開口幅ｈ、ｈ’に相当する角度をＣ、Ｃ’、水用開口部３１及び湯用開口部３２の回転方向に沿ったずれ角度をｋ（開口中心線ａ−ｂ間の角度間隔）とすれば、水と湯の混合機能を得るためには、前記角度ｋと、前記角度Ｃの１／２と、前記角度Ｃ’の１／２との合計角度、つまり、開口部３１、３２の回転方向における総開口角度（総開口幅）が前記角度Ｂ（閉塞幅）より大きいことが必要とされる。   That is, as shown in FIG. 9 as described above, also in the mixing valve 1 of the present embodiment, the outer diameter d of the valve body 20 and the inner diameter of the valve body 10 are shown in a simplified diagram in FIG. D (d and D are substantially equal), opening width h of the water opening 31, opening width h ′ of the hot water opening 32, opening width H of the water inlet 11, and opening width H of the hot water inlet 12 In addition, the edge portions on one end side of the water introduction port 11 and the hot water introduction port 12 are P and Q, the edge portions on the other end side are R and S, and PQ along the rotation direction of the valve body 20 The angle between them (blocking width) is A, the angle between RS along the rotation direction of the valve body 20 (blocking width) is B, the opening widths h and h ′ of the water opening 31 and the hot water opening 32. And C ′, and the deviation angle along the rotation direction of the water opening 31 and the hot water opening 32 is k (an angular interval between the opening center lines ab). of In order to obtain a combined function, the total angle of the angle k, ½ of the angle C, and ½ of the angle C ′, that is, the total opening angle in the rotation direction of the openings 31 and 32 ( The total opening width) needs to be larger than the angle B (blocking width).

条件（１’）・・・（ｋ＋Ｃ／２＋Ｃ’／２）＞Ｂ   Condition (1 ') ... (k + C / 2 + C' / 2)> B

この条件（１’）は、図９に示される一つの開口部３０が設けられているものを用いて先に説明した条件（１）に対応している。   This condition (1 ') corresponds to the condition (1) described above using the one provided with one opening 30 shown in FIG.

また、湯量絞り機能を得るには、水導入口１１の閉塞が湯導入口１２の閉塞より早く行われることが要求されるため、前記ｋと前記角度Ｃの１／２、前記角度Ｃ’の１／２との合計角度が角度Ｅより小さいことが必要とされる。   Further, in order to obtain the hot water amount throttling function, it is required that the water inlet 11 is closed earlier than the hot water inlet 12 is closed. Therefore, k and ½ of the angle C and the angle C ′ The total angle with 1/2 is required to be smaller than the angle E.

条件（２’）・・・（ｋ＋Ｃ／２）＋Ｃ’／２＜Ｅ   Condition (2 ') ... (k + C / 2) + C' / 2 <E

本実施形態の混合弁１においては、弁体２０に水用開口部３１及び湯用開口部３２を、また、水入口継手１１Ａ及び湯入口継手１２Ａには水導入口１１及び湯導入口１２を、それぞれ前記弁体２０の回転軸線Ｏに沿って段違いとなるように配在しているので、前記した条件（１’）及び条件（２’）を同時に満足させることができ、その結果、水と湯の混合機能と湯量絞り機能の双方を併せ持つことができる。   In the mixing valve 1 of this embodiment, the water opening 31 and the hot water opening 32 are provided in the valve body 20, and the water inlet 11 and the hot water inlet 12 are provided in the water inlet joint 11A and the hot water inlet joint 12A. , Each of the valve bodies 20 are arranged so as to be stepped along the rotational axis O of the valve body 20, so that the above-described condition (1 ′) and condition (2 ′) can be satisfied at the same time. It can have both a mixing function of hot water and hot water and a function of squeezing hot water.

実際に、かかる構成のもとで、例えば、図７（１）に示される如くに、水導入口１１の開口面積が最大（全開）、かつ、湯導入口１２の開口面積が最小（０＝全閉）となる前記弁体２０の位置を初期位置として、該初期位置から前記弁体２０を一方向（時計回り）に回転させた場合、水導入口１１の開口面積（流量）及び湯導入口１２の開口面積（流量）は図８の模式図に示される如くに変化する。すなわち、初期位置からの回転角度に従って、水導入口１１の開口面積（流量）が減少するとともに、湯導入口１２の開口面積（流量）が増大し、図７（２）に示される如くに、回転角度が所定角度Ｕａになると水と湯の流量が同じとなって混合比率が５０％：５０％となり、さらに、弁体２０を所定角度Ｕｂまで回転させると、図７（３）に示される如くに、水導入口１１の開口面積（流量）が漸減して０（全閉）となるとともに、湯導入口１２の開口面積（流量）が漸増して最大となる。   Actually, under such a configuration, for example, as shown in FIG. 7 (1), the opening area of the water inlet 11 is maximum (fully open) and the opening area of the hot water inlet 12 is minimum (0 = When the position of the valve body 20 that is fully closed) is the initial position and the valve body 20 is rotated in one direction (clockwise) from the initial position, the opening area (flow rate) of the water inlet 11 and hot water introduction The opening area (flow rate) of the mouth 12 changes as shown in the schematic diagram of FIG. That is, according to the rotation angle from the initial position, the opening area (flow rate) of the water inlet 11 decreases and the opening area (flow rate) of the hot water inlet 12 increases, as shown in FIG. When the rotation angle reaches the predetermined angle Ua, the flow rates of water and hot water are the same, and the mixing ratio becomes 50%: 50%. Further, when the valve body 20 is rotated to the predetermined angle Ub, FIG. As described above, the opening area (flow rate) of the water inlet 11 gradually decreases to 0 (fully closed), and the opening area (flow rate) of the hot water inlet 12 gradually increases to a maximum.

この状態から、さらに、前記弁体２０を前記所定角度Ｕｂを越えて所定角度Ｕｃまで回転させると、図７（４）、（５）に示される如くに、水導入口１１を全閉にした状態で、湯導入口１２の開口面積（流量）が、弁体２０の回転角度に従いつつ最大から最小まで連続的に変化する。   From this state, when the valve body 20 is further rotated beyond the predetermined angle Ub to the predetermined angle Uc, the water inlet 11 is fully closed as shown in FIGS. 7 (4) and (5). In the state, the opening area (flow rate) of the hot water inlet 12 continuously changes from the maximum to the minimum while following the rotation angle of the valve body 20.

したがって、本実施形態の混合弁１においては、水導入口１１の開口面積が最大、かつ、湯導入口１２の開口面積が０となる弁体２０の位置を初期位置として、弁体２０を所定角度Ｕｂ〜所定角度Ｕｃの範囲内で回動させることにより、水導入口１１を全閉にした状態で、湯量（のみ）を絞ることができる。   Therefore, in the mixing valve 1 of the present embodiment, the valve body 20 is set to a predetermined position with the position of the valve body 20 where the opening area of the water introduction port 11 is maximum and the opening area of the hot water introduction port 12 is 0 as an initial position. By rotating within the range of the angle Ub to the predetermined angle Uc, the amount (only) of hot water can be reduced with the water inlet 11 fully closed.

このように、本実施形態の混合弁１では、弁体２０に水用開口部３１及び湯用開口部３２を、また、水入口継手１１Ａ及び湯入口継手１２Ａには水導入口１１及び湯導入口１２を、それぞれ前記弁体２０の回転軸線Ｏに沿って段違いとなるように配在しているので、大型化、重量増、成形精度の低下等を招くことなく、また、回転負荷の増大、作動不良の増加、漏れ量の増大等も招来することなく、水と湯を混合して迅速かつ正確に所望温度及び流量の温水を得ることができるとともに、水導入口１１を全閉にした状態で、湯量（のみ）を合理的に絞ることができ、その結果、コンパクトで安価で有用な混合弁を提供することが可能となる。   Thus, in the mixing valve 1 of the present embodiment, the water opening 31 and the hot water opening 32 are provided in the valve body 20, and the water inlet 11 and the hot water introduction are provided in the water inlet joint 11A and the hot water inlet joint 12A. Since the ports 12 are arranged so as to be stepped along the rotation axis O of the valve body 20, respectively, without increasing the size, increasing the weight, lowering the molding accuracy, etc., and increasing the rotational load. In addition, water and hot water can be mixed quickly and accurately to obtain hot water at a desired temperature and flow rate without causing an increase in malfunctions, an increase in leakage, and the water inlet 11 is fully closed. In the state, the amount of hot water (only) can be rationally reduced, and as a result, a compact, inexpensive and useful mixing valve can be provided.

本発明に係る混合弁の一実施形態を示す部分切欠縦断面図。The partial notch longitudinal cross-sectional view which shows one Embodiment of the mixing valve which concerns on this invention. （Ａ）は図１のＡ−Ａ矢視断面図、（Ｂ）は図１のＢ−Ｂ矢視断面図。(A) is AA arrow sectional drawing of FIG. 1, (B) is BB arrow sectional drawing of FIG. 図１に示される混合弁の弁本体を示す水平断面図。The horizontal sectional view which shows the valve body of the mixing valve shown by FIG. （Ａ）は図１のＸ−Ｘ矢視断面図、（Ｂ）は図１のＹ−Ｙ矢視断面図。(A) is a sectional view taken along the line XX in FIG. 1, and (B) is a sectional view taken along the line YY in FIG. 図１に示される混合弁の弁体を示し、（Ａ）は斜視図、（Ｂ）は側面図。The valve body of the mixing valve shown by FIG. 1 is shown, (A) is a perspective view, (B) is a side view. 図１に示される混合弁の構成の説明に供される図であり、（Ａ）は水導入口側を示す、図１のＸ−Ｘ矢視断面図に相当する簡略図、（Ｂ）は湯導入口側を示す、図１のＹ−Ｙ矢視断面図に相当する簡略図、（Ｃ）は（Ａ）と（Ｂ）の複合図。It is a figure with which it uses for description of the structure of the mixing valve shown by FIG. 1, (A) is the simplified figure equivalent to the XX arrow sectional drawing of FIG. The simplified view equivalent to the YY arrow sectional drawing of FIG. 1 which shows the hot water inlet side, (C) is the compound figure of (A) and (B). 図１に示される混合弁の動作説明に供される図。The figure which is provided for operation | movement description of the mixing valve shown by FIG. 図１に示される混合弁の特性を示すグラフ。The graph which shows the characteristic of the mixing valve shown by FIG. 本発明が解決しようとする課題の説明に供される混合弁の水平断面図。The horizontal sectional view of the mixing valve used for description of the subject which this invention tends to solve. 本発明が解決しようとする課題の説明に供される図。The figure which is provided for description of the subject which this invention tends to solve.

符号の説明Explanation of symbols

１ 混合弁
１０ 弁本体
１１ 水導入口
１１Ａ 水入口継手
１２ 湯導入口
１２Ａ 湯入口継手
１３ 導出口
１４ 弁室
２０ 弁体
２２ 周壁部
３１ 水用開口部
３２ 湯用開口部 DESCRIPTION OF SYMBOLS 1 Mixing valve 10 Valve body 11 Water inlet 11A Water inlet joint 12 Hot water inlet 12A Hot water inlet joint 13 Outlet 14 Valve chamber 20 Valve body 22 Circumferential wall 31 Water opening 32 Hot water opening

Claims (1)

水導入口が形成された水入口継手及び湯導入口が形成された湯入口継手が実質的に同一平面上に設けられるとともに、該水導入口及び湯導入口の下流側に導出口が設けられた弁本体と、該弁本体内に回動可能に嵌挿され、その周壁部に前記水導入口及び湯導入口の開口面積を回転角度に従って連続的に変化させるべく水用開口部及び湯用開口部が設けられた概略円筒状の弁体とを備えた混合弁であって、
前記水入口継手及び湯入口継手が断面円形とされ、前記水導入口及び湯導入口が半月ないし三日月状とされており、
前記弁体により前記水導入口を全閉にした状態で、前記湯導入口の開口面積を前記弁体の回転角度に従いつつ最大から最小まで連続的に変化させるべく、前記水導入口及び湯導入口並びに前記水用開口部及び湯用開口部が、前記弁体の回転軸線に沿って段違いとなるように配在されており、
前記水導入口の開口面積が最大、かつ、前記湯導入口の開口面積が最小となる前記弁体の位置を初期位置として、該初期位置から前記弁体を一方向に所定角度回転させると、前記水導入口の開口面積が漸減して０となるとともに、前記湯導入口の開口面積が漸増して最大となり、この状態から前記弁体をさらに同じ方向に所定角度回転させると、前記水導入口が全閉状態のまま、前記湯導入口の開口面積が漸減して最小となるように構成されていることを特徴とする混合弁。 The water inlet joint formed with the water inlet and the hot water inlet joint formed with the hot water inlet are provided on substantially the same plane, and the outlet is provided downstream of the water inlet and the hot water inlet. A valve main body, and a water opening and a hot water fitting that are rotatably inserted in the valve main body and continuously change the opening area of the water inlet and the hot water inlet in accordance with the rotation angle. A mixing valve comprising a generally cylindrical valve body provided with an opening,
The water inlet joint and the hot water inlet joint have a circular cross section, and the water inlet and the hot water inlet have a half-moon or crescent shape,
In order to continuously change the opening area of the hot water inlet from the maximum to the minimum while following the rotation angle of the valve body in a state where the water inlet is fully closed by the valve body, The mouth, the water opening and the hot water opening are arranged so as to be stepped along the rotation axis of the valve body ,
When the opening area of the water inlet is the maximum and the position of the valve body where the opening area of the hot water inlet is the minimum is the initial position, the valve body is rotated from the initial position by a predetermined angle, The opening area of the water inlet gradually decreases to zero, and the opening area of the hot water inlet gradually increases to a maximum. From this state, when the valve body is further rotated by a predetermined angle in the same direction, the water introduction A mixing valve characterized in that the opening area of the hot water inlet is gradually reduced to a minimum while the mouth is fully closed .
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