【発明の詳細な説明】
産業上の利用分野
本発明は、夫々個別に供給される湯と水を望み
の温度になるよう混合し、この混合湯水の温度を
自動的に維持制御し供給する、自動温度制御式湯
水混合栓に関するものである。
従来の技術
従来のこの種の湯水混合栓は、たとえば特公昭
58−40060号公報に示されたように、第３図のよ
うな構成になつていた。すなわち、本体１の略中
央の同軸線上につまみ２、スプライン軸３、作動
軸４、感熱部５、エレメント・ケース６、制御弁
体７などが、ばね材による押圧などで接触係合さ
れ、本体１の各隔壁とあいまつて、湯入口８、お
よび水入口９にはじまる湯流路１０、水流路１
１、混合水流路１２を形成しており、つまみ２を
回してスプライン軸３を回転させ、作動軸４を前
進（第３図の右から左へ）させると、感熱部５が
前方（第３図の左方）に押し出され、エレメント
ケース６を介して、制御弁体７が前方に移動し、
その結果、湯側制御弁１３の間隙がせばまると同
時に水側制御弁１４の間隙が拡がつて湯と水の流
入量の割合が変えられ、混合水の温度が低下側に
変わることになるし、また、つまみ２を反対方向
に回せば、逆の作用になり、混合水の温度が上昇
側に変わることになる。また、供給される湯また
は水の温度や圧力の変化で混合水の温度に変化が
生じた場合にも、感温部５の温度変化に応じた膨
張または収縮の変位により、エレメントケース６
を介して制御弁体７に変位を与えることにより、
混合水の温度が上昇気味の場合には湯側制御弁１
３の間隙をせばめると同時に水側制御弁１４の間
隙を拡げ、また混合水の温度が下降気味の場合に
は逆に作動することにより、湯と水の流量を加減
し、所望の温度の混合水を得るように成す。
発明が解決しようとする問題点
しかしながら、上記のような構成では、感温部
５の温度環境が、絶えず制御弁体７を制御してい
るこになり混合水の出湯の有無に拘らず、感温部
５の温度が変化すれば制御弁体７の位置も従属的
に変化し、そのために、設定指示した通りの温度
の混合水の供給を受けていても一たび出湯を停止
すれば、時間の経過とともに感温部５の温度が放
熱により低下し、制御弁体７は湯側制御弁１３の
間隙を拡げる方向に変位し、湯量の割合を増すよ
うになり、その結果、再使用の当初は、停止時間
が長い程、設定している温度よりも高い温度の混
合水が出湯することになり、場合によつては、や
けどの危険にもつながるという問題点を有してい
た。
本発明は、かかる従来の問題点を解消するもの
で、出湯停止後は、制御弁体７の設定位置を変化
させないようにして、再使用時にも、同じ状態で
出湯させ、かつ、再使用時初期の熱湯流出を防ぐ
ことを目的としている。
問題点を解決するための手段
上記問題点を解決するために、本発明の湯水混
合栓は本体と制御弁体と、この制御弁体に夫々接
触係合する正動感温素子と負動感温素子とを併有
する構成を備えたものである。
作 用
本発明は上記した構成により、混合水出湯中は
正動感温素子の接触係合による作動で、制御弁体
が変位して、設定指示した通りの温度が得られる
ような混合比になるよう、湯側制御弁と水側制御
弁の開口度合となるが、一たび出湯を停止すれ
ば、負動感温素子が、放熱による温度低下ととも
に正動感温素子の作動と逆方向に接触係合作動
し、制御弁体の変位を、零または微小にとどめる
ように作用するのである。
実施例
以下、本発明の実施例を添付図面にもとづいて
説明する。第１図、第２図において、本体１５に
湯入口１６、湯流路１７、水入口１８、水流路１
９、混合水流路２０、混合水出口２１が形成さ
れ、夫々、外部の給湯源及び給水源（いずれも図
示せず）や吐出具や開閉弁（いずれも図示せず）
と連結される。また本体１５の内部には、さら
に、湯流路１７と水流路１９とを隔てる隔壁Ａ２
２と、水流路１９と混合水流路２０とを隔てる隔
壁Ｂ２３とが形成され、かつ、隔壁Ａ２２の中央
は孔穿されて、中央が有心の円筒状の制御弁体２
４が挿入配設されており、前記制御弁体２４の湯
流路１７側の端部は本体１５の一部と関係して湯
側制御弁２５を、また、前記制御弁体２４の水流
路１９側の端部は本体１５の一部と関係して水側
制御弁２６を、夫々形成し、さらに、前記隔壁Ｂ
２３の混合水流路２０側には本体１５の略中央の
同軸心状に、内部にワツクスなどの感熱応動物質
を有した正動感温素子２７が、混合空間２８を介
してエレメントケースＡ２９に包覆された状態で
挿入配設され、そのエレメントケースＡ２９の制
御弁体２４側の端部には突起Ａ３０が配設されて
前記制御弁体２４の中心部に接触係合しており、
同時に前記制御弁体２４はその中心部とそれに相
対する前記本体１５の内壁との間に、ばねＡ３１
を介して押設されている。更に、正動感温素子２
７の他端部はエレメントケースＡ２９の他端と固
定係合し、他端部は更に伸びて摺動可能な突起Ｂ
３２となつている。更にエレメントケースＡ２９
は前記隔壁Ｂ２３と数カ所で摺動自在に内接して
いる。また隔壁Ｂ２３は、一カ所または数カ所、
適所に素子スペース３３が設けられ負動感熱素子
３４が挿入配設され、ブツシユ３５で螺錠されて
いる。前記負動感温素子３４は、第２図の拡大図
に示すように、中央に中空シヤフト３６をもつ感
熱ケース３７の中に、前記中空シヤフト３６を貫
通する接触杆３８と、この接触杆３８と内部で固
定係合し、前記中空シヤフト３６の摺動自在の状
態で被覆する摺動冠３９と、前記感熱ケース３７
に内接固定されて前記摺動冠３９をガイドする固
定冠４０と、摺動パツキン４１を帯持し前記中空
シヤフト３６に添つて摺動する摺動ブツシユ４２
と、前記摺動冠３９と固定冠４０の間に介在され
たばねＢ４３と摺動冠ストツパー４４とを有し、
かつ前記感熱ケース３７と摺動ブツシユ４２との
間には、ワツクス等の感熱応動物質を封入してあ
る。前記接触杆３８はその先端が接触係合に有利
なように、直角曲げ等の適宜形状をしており、位
置的には水側制御弁２６において、条件により制
御弁体２４と接触係合するように、配置される。
更に、本体１５の略中央の同軸線上に、つまみ
４５、スプライン軸４６、作動軸４７、および係
合冠４８が順次配設され、前記正動感温素子２７
の突起Ｂ３２と、ばね材による押圧で接触係合さ
れている。
次に、上記の構成における作用を説明する。
つまみ４５を回してスプライン軸４６を回転さ
せ、作動軸４７は前進（第１図の右から左へ）さ
せ、係合冠４８を介して突起Ｂ３２を押せば、正
動感温素子２７およびエレメントケースＡ２９を
押し、その結果、制御弁体２４が突起Ａ３０を介
してばねＡ３１に抗して湯側制御弁２５の方に押
されて移動し、湯側制御弁２５と水側制御弁２６
との開口度合が設定されることになる。この状態
で温水及び水を供給すれば過渡的な状態の後、指
示温度の混合水が出湯するよう、予め設定が行わ
れている。この場合、負動感温素子３４は正動感
温素子２７の変位方向と逆の方向への作動を行う
ので、その接触杆３８は、正動感温素子２７が前
進変位を行う場合は後進変位を、正動感温素子２
７が後進変位を行う場合は前進変位を、夫々行う
が、正動感温素子２７が全周を混合空間２８に曝
されているのに対し、負動感温素子３４は片側面
を水流路１９に接する隔壁Ｂ２３に配設されてい
るため、環境温度が低く、正動感温素子２７の作
動よりも小さくなり、従つて、混合出湯中は、制
御弁体２４の変位を妨げることはない。しかしな
がら、一たび使用を停止し、湯水と水の供給を断
つた場合は、正動感温素子２７の混合空間２８内
の混合水温度の放熱による温度低下による変位変
化よりも速く、負動感温素子３４は作動し、感熱
応動物質の収縮に伴い、ばねＢ４３の押圧で前進
作動する摺動冠３９に押されて変位する接触杆３
８の先端部が、水側制御弁２６の部分で制御弁体
２４と接触係合し、正動感温素子２７の変位で、
ばねＡ３１の付勢で後進しようとする制御弁体２
４の動きを阻止する。
上記のような負動感温素子３４の作動により、
混合水停止後も、湯側制御弁２５と水側制御弁２
６の開口度合を変化させることがなく、再使用時
もほぼ停止時と同じ状態の混合水を得ることがで
きるうえ、停止時には負動感温素子３４の接触杆
３８は、むしろ湯側制御弁２５を閉じる方向に働
いているので、再使用時のやけどの危険などは全
くない、などの効果がある。
発明の効果
以上のように、本発明の湯水混合栓によれば、
次のような効果が得られる。
(1) 混合栓停止時には、負動感温素子の作動で、
湯側制御弁の開閉度を変えないので、再使用時
にも、同じ状態の混合水が得られるという効果
がある。
(2) 負動感温素子は、湯側制御弁を閉じる方向に
働いているので、再使用時には、その前の使用
時より高い温度の混合水が出湯することはな
く、やけどの危険は全くない。 DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is a method of mixing separately supplied hot water and water to a desired temperature, and automatically maintaining and controlling the temperature of the mixed hot water and supplying the water. This invention relates to an automatic temperature-controlled hot water mixing faucet. Conventional technology This type of conventional hot water mixer faucet is, for example,
As shown in Publication No. 58-40060, it had a configuration as shown in FIG. That is, the knob 2, the spline shaft 3, the operating shaft 4, the heat sensitive part 5, the element case 6, the control valve body 7, etc. are brought into contact engagement on a coaxial line approximately in the center of the main body 1 by pressing with a spring material, etc. 1, a hot water flow path 10 and a water flow path 1 starting from a hot water inlet 8 and a water inlet 9.
1. It forms a mixed water flow path 12, and when the knob 2 is turned to rotate the spline shaft 3 and the operating shaft 4 is moved forward (from right to left in Fig. 3), the heat sensitive part 5 moves forward (from the third (to the left in the figure), the control valve body 7 moves forward via the element case 6,
As a result, the gap between the hot water side control valve 13 narrows and at the same time the gap between the water side control valve 14 widens, changing the ratio of the inflow amounts of hot water and water, and causing the temperature of the mixed water to decrease. Also, if you turn knob 2 in the opposite direction, the opposite effect will occur and the temperature of the mixed water will change to the rising side. Furthermore, even if the temperature of the mixed water changes due to a change in the temperature or pressure of the supplied hot water or water, the element case 6
By applying displacement to the control valve body 7 via
If the temperature of the mixed water is rising, hot water side control valve 1
By narrowing the gap 3 and widening the gap at the same time as the water side control valve 14, and by operating in the opposite direction when the temperature of the mixed water is on the decline, the flow rate of hot water and water can be adjusted to reach the desired temperature. Make to get mixed water. Problems to be Solved by the Invention However, with the above configuration, the temperature environment of the temperature sensing section 5 is constantly controlling the control valve body 7, and the temperature sensing unit 5 is constantly controlling the control valve body 7. When the temperature of the hot section 5 changes, the position of the control valve body 7 also changes accordingly, so even if mixed water is being supplied at the specified temperature, once the hot water supply is stopped, the time will change. With the passage of time, the temperature of the temperature sensing part 5 decreases due to heat radiation, and the control valve body 7 is displaced in the direction of widening the gap of the hot water side control valve 13, increasing the proportion of the amount of hot water. However, the longer the stop time is, the more mixed water will come out at a temperature higher than the set temperature, which may lead to a risk of burns. The present invention solves such conventional problems by preventing the setting position of the control valve body 7 from changing after the hot water tap is stopped, so that the hot water can be tapped in the same state even when reused, and when the hot water is reused. The purpose is to prevent hot water from flowing out in the early stages. Means for Solving the Problems In order to solve the above problems, the hot water mixer faucet of the present invention includes a main body, a control valve body, a positive temperature sensing element and a negative temperature sensing element that contact and engage the control valve body, respectively. It is equipped with a configuration that combines the following. Function The present invention has the above-described configuration, and when the mixed water is being dispensed, the control valve body is displaced by the contact engagement of the positive-acting temperature sensing element, and the mixture ratio is set such that the temperature as set and instructed is obtained. The opening degrees of the hot water side control valve and the water side control valve are as follows, but once the hot water supply is stopped, the negative temperature sensing element contacts and engages in the opposite direction to the operation of the positive temperature sensing element as the temperature decreases due to heat radiation. It acts to keep the displacement of the control valve body to zero or very small. Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings. 1 and 2, the main body 15 includes a hot water inlet 16, a hot water flow path 17, a water inlet 18, and a water flow path 1.
9. A mixed water flow path 20 and a mixed water outlet 21 are formed, and are connected to an external hot water source and water supply source (both not shown), a discharge device, and an on-off valve (both not shown), respectively.
is connected with. Furthermore, inside the main body 15, there is a partition wall A2 separating the hot water flow path 17 and the water flow path 19.
2 and a partition wall B23 that separates the water flow path 19 and the mixed water flow path 20 are formed, and the center of the partition wall A22 is perforated to form a cylindrical control valve body 2 with a center.
4 is inserted and disposed, and the end of the control valve body 24 on the hot water flow path 17 side connects with a part of the main body 15 to connect the hot water side control valve 25, and also connects the water flow path of the control valve body 24 with the hot water side control valve 25. The end portion on the 19 side forms a water side control valve 26 in relation to a part of the main body 15, and further, the partition wall B
On the mixed water flow path 20 side of No. 23, a positive-acting temperature-sensitive element 27 having a heat-sensitive substance such as wax inside is located coaxially at approximately the center of the main body 15 and is enclosed in an element case A29 via a mixing space 28. A protrusion A30 is disposed at the end of the element case A29 on the control valve body 24 side and is in contact with the center of the control valve body 24,
At the same time, the control valve body 24 has a spring A31 between its center and the inner wall of the main body 15 facing thereto.
It is pressed through. Furthermore, a positive temperature sensing element 2
The other end of 7 is fixedly engaged with the other end of element case A29, and the other end is a protrusion B that can further extend and slide.
32. Furthermore, element case A29
is slidably inscribed with the partition wall B23 at several locations. Moreover, the partition wall B23 is provided at one or several locations,
An element space 33 is provided at a proper location, a negative heat-sensitive element 34 is inserted therein, and the bush 35 is screwed into the element space 33. As shown in the enlarged view of FIG. 2, the negative temperature-sensitive element 34 includes a heat-sensitive case 37 having a hollow shaft 36 in the center, a contact rod 38 penetrating the hollow shaft 36, and a contact rod 38. a sliding crown 39 that is fixedly engaged with the inside and slidably covers the hollow shaft 36; and the thermal case 37.
a fixed crown 40 that is inwardly fixed to and guides the sliding crown 39; and a sliding bushing 42 that carries a sliding bushing 41 and slides along the hollow shaft 36.
and a spring B43 and a sliding crown stopper 44 interposed between the sliding crown 39 and the fixed crown 40,
A heat-sensitive substance such as wax is sealed between the heat-sensitive case 37 and the sliding bush 42. The tip of the contact rod 38 has an appropriate shape such as a right-angled bend so that it is advantageous for contact engagement, and is located at the water side control valve 26 and comes into contact engagement with the control valve body 24 depending on conditions. It is arranged as follows. Further, a knob 45, a spline shaft 46, an operating shaft 47, and an engagement crown 48 are sequentially disposed on a coaxial line approximately in the center of the main body 15, and the positive-acting temperature sensing element 27
It is brought into contact engagement with the protrusion B32 by pressure from a spring material. Next, the operation of the above configuration will be explained. Turn the knob 45 to rotate the spline shaft 46, move the operating shaft 47 forward (from right to left in FIG. 1), and push the protrusion B32 through the engagement crown 48 to remove the positive motion temperature sensing element 27 and the element case. A29 is pressed, and as a result, the control valve body 24 is pushed and moved toward the hot water side control valve 25 through the protrusion A30 against the spring A31, and the hot water side control valve 25 and the water side control valve 26 are pressed.
The opening degree will be set. Settings have been made in advance such that if hot water and cold water are supplied in this state, mixed water at the specified temperature will be dispensed after a transient state. In this case, the negative temperature sensing element 34 operates in the opposite direction to the direction of displacement of the positive temperature sensing element 27 , so that when the positive temperature sensing element 27 moves forward, its contact rod 38 moves backward when the positive temperature sensing element 27 moves forward. Positive motion temperature sensing element 2
7 performs forward displacement when performing backward displacement, but while the positive temperature sensing element 27 has its entire circumference exposed to the mixing space 28, the negative temperature sensing element 34 has one side exposed to the water flow path 19. Since it is disposed on the adjacent partition wall B23, the environmental temperature is low and the operation is lower than that of the positive temperature sensing element 27 , so that the displacement of the control valve body 24 is not hindered during mixing and tapping. However, once the use is stopped and the supply of hot water and water is cut off, the displacement changes faster than the displacement change due to the temperature drop due to heat radiation of the mixed water temperature in the mixing space 28 of the positive-acting temperature-sensing element 27 . 34 is a contact rod 3 that is activated and is displaced by a sliding crown 39 that moves forward under the pressure of a spring B43 as the heat-sensitive substance contracts.
8 comes into contact with the control valve body 24 at the water side control valve 26, and with the displacement of the positive temperature sensing element 27 ,
The control valve body 2 tries to move backward due to the bias of the spring A31.
Block the movement of 4. By the operation of the negative temperature sensing element 34 as described above,
Even after the mixed water is stopped, the hot water side control valve 25 and the water side control valve 2
6 does not change the degree of opening of the hot water side control valve 25 , and when the water is reused, it is possible to obtain mixed water in almost the same state as when the water is stopped. Since it works in the direction of closing, there is no risk of burns when reusing it. Effects of the Invention As described above, according to the hot water mixer faucet of the present invention,
The following effects can be obtained. (1) When the mixer faucet is stopped, the negative temperature sensing element is activated.
Since the opening/closing degree of the hot water side control valve is not changed, the mixed water in the same state can be obtained even when reused. (2) The negative temperature sensing element works in the direction of closing the hot water side control valve, so when it is reused, mixed water at a higher temperature than the previous use will not come out, and there is no risk of burns. .
【図面の簡単な説明】[Brief explanation of the drawing]
第１図は本発明の一実施例における湯水混合栓
の断面図、第２図は負動感温素子部分の拡大断面
図、第３図は従来の湯水混合栓の一例の断面図で
ある。
１５…本体、１６…湯入口、１８…水入口、２
１…混合水出口、２４…制御弁体、２５…湯側制
御弁、２６…水側制御弁、２７…正動感温素子、
３４…負動感温素子。
FIG. 1 is a cross-sectional view of a hot water mixer faucet according to an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view of a negative temperature sensing element portion, and FIG. 3 is a cross-sectional view of an example of a conventional hot water mixer faucet. 15...Main body, 16...Hot water inlet, 18...Water inlet, 2
1...Mixed water outlet, 24...Control valve body, 25...Hot water side control valve, 26...Water side control valve, 27 ...Positive temperature sensing element,
34...Negative temperature sensing element.