JPH0820120B2 - Backflow prevention device - Google Patents
Backflow prevention deviceInfo
- Publication number
- JPH0820120B2 JPH0820120B2 JP2081779A JP8177990A JPH0820120B2 JP H0820120 B2 JPH0820120 B2 JP H0820120B2 JP 2081779 A JP2081779 A JP 2081779A JP 8177990 A JP8177990 A JP 8177990A JP H0820120 B2 JPH0820120 B2 JP H0820120B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- water
- atmosphere
- atmosphere opening
- port
- 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
- Control For Baths (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、主に２階等の高所に設けられた浴槽等内の
水が上水道へ逆流しないように、給湯器から浴槽への水
路中に設けられる逆流防止装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention mainly relates to a water passage from a water heater to a bathtub so that water in a bathtub or the like provided at a high place such as the second floor does not flow back into the water supply. The present invention relates to a backflow prevention device provided therein.
［従来の技術］ 水路の逆流防止装置としては、例えば特開平２−3722
6号公報の発明のように、直列に配した２つの逆止弁の
間の水路に、水路を大気と開放するための大気開放弁を
設けたものがある。[Prior Art] As a backflow prevention device for a water channel, for example, JP-A-2-3722
As in the invention of Japanese Patent No. 6, there is a water channel provided between two check valves arranged in series with an air release valve for opening the water channel to the atmosphere.
この発明では、給湯器から供給される温水は、上流側
の逆止弁を開いて逆止弁間の水路を満たし、この給湯器
から供給される温水の圧力が一定圧力以上になると大気
開放弁は空気口を閉じ、また、その水圧によって下流側
の逆止弁を開き、浴槽へ温水が供給される。In the present invention, the hot water supplied from the water heater opens the check valve on the upstream side to fill the water passage between the check valves, and when the pressure of the hot water supplied from the water heater becomes equal to or higher than a certain pressure, the atmosphere release valve is opened. Closes the air port and opens the check valve on the downstream side by the water pressure to supply hot water to the bath.
［発明が解決しようとする課題］ しかし、上記の発明では、給湯器から供給される温水
の圧力が一定圧力以上になり、空気口から流出する温水
量より多くの流量が大気開放弁の弁室（空気室）内に供
給されて、弁室内が十分な水量で満たされて水が溢れる
ようにならなければ大気開放弁が空気口を閉じないた
め、給湯の開始時において、供給される温水量に対する
応答性が悪いとともに、空気口から流出する温水が多い
という問題がある。[Problems to be Solved by the Invention] However, in the above-mentioned invention, the pressure of the hot water supplied from the water heater becomes equal to or higher than a certain pressure, and a flow rate larger than the amount of hot water flowing out from the air port is the valve chamber of the atmosphere release valve. The amount of hot water supplied at the start of hot water supply because the atmosphere opening valve does not close the air port unless it is supplied into the (air chamber) and the valve chamber is filled with a sufficient amount of water and the water overflows. There is a problem that the responsiveness to is poor and a large amount of hot water flows out from the air port.
本発明は、供給される水の流量に対して敏感に反応し
て空気口を閉じ、空気口から溢れる水量を少なくするこ
とができる逆流防止装置を提供することを目的とする。It is an object of the present invention to provide a backflow prevention device that is sensitive to the flow rate of supplied water and closes the air port to reduce the amount of water overflowing from the air port.
［課題を解決するための手段］ 本発明は、請求項１では、第１の逆止弁と第２の逆止
弁とが水路に対して順方向に直列に設けられ、前記第１
の逆止弁と前記第２の逆止弁との間に大気と通じるため
の大気開放口が形成された逆流防止装置において、前記
大気開放口を前記第１の逆止弁の弁体が配された弁室に
形成し、前記大気開放口を開閉する大気開放弁を前記弁
体と一体に設けて、前記第１の逆止弁と前記大気開放口
とを可逆的に開閉させるとともに、前記弁体が開閉する
弁口および前記大気開放弁より大きく設定され前記弁口
から流入する水の水圧を受ける受水圧部を前記弁口に関
与しないように前記弁体の周囲に備えたことを技術的手
段とする。[Means for Solving the Problem] In the present invention, in the first aspect, the first check valve and the second check valve are provided in series in the forward direction with respect to the water channel, and the first check valve is provided.
In the backflow prevention device, in which an atmosphere opening port for communicating with the atmosphere is formed between the check valve and the second check valve, the atmosphere opening port is arranged by the valve body of the first check valve. An atmosphere release valve that is formed in the valve chamber and opens and closes the atmosphere release port integrally with the valve body to reversibly open and close the first check valve and the atmosphere release port, and A valve opening for opening and closing of the valve body and a water pressure receiving portion that is set larger than the atmosphere opening valve and receives the water pressure of water flowing in from the valve opening are provided around the valve body so as not to be involved in the valve opening. As a means.
また、請求項２では、前記受水圧部に貫通口を設けた
ことを技術的手段とする。Moreover, in Claim 2, it is a technical means to provide a through-hole in the water pressure receiving portion.
また、請求項３では、前記大気開放口の周囲に、前記
大気開放弁との間に間隙を有する包囲壁を設けたことを
技術的手段とする。Further, in a third aspect of the present invention, the technical means is to provide a surrounding wall around the atmosphere opening port with a gap between the atmosphere opening valve and the surrounding wall.
［作用］ 本発明では、第１の逆止弁へ水圧が加わると、弁体が
移動して弁室内へ水が流入する。[Operation] In the present invention, when water pressure is applied to the first check valve, the valve body moves and water flows into the valve chamber.
このとき、水は、弁体が開閉する弁口に対して十分大
きく弁口に関与しないように弁体に備えられた受水圧部
に受け止められるため、弁体は、弁口を開く側へ容易に
移動して、第１の逆止弁の弁口を速やかに開く。また、
大気開放弁は受水圧部に対して十分小さく、弁体と大気
開放弁とは一体に設けられ、互いに可逆的に開閉するた
め、弁体が弁口を開くように作動すると、大気開放弁は
大気開放口を容易に閉じるように作動する。At this time, the water is received by the water pressure receiving portion provided in the valve body so that the water is sufficiently large with respect to the valve opening and closing the valve body, so that the valve body can be easily opened to the side where the valve body opens. To quickly open the valve opening of the first check valve. Also,
The atmosphere release valve is sufficiently small with respect to the water pressure receiving part, and the valve body and the atmosphere release valve are integrally provided and open and close reversibly with each other, so when the valve body operates to open the valve opening, the atmosphere release valve Operates to easily close the air vent.
また請求項２では、受水圧部に貫通口が設けられてい
るため、第１の逆止弁の弁口から流入する水に対する受
水圧は確保でき、同時に第１の逆止弁を通過する水量が
少なくならないようにすることができる。Further, in claim 2, since the water receiving pressure portion is provided with the through port, the water receiving pressure for the water flowing in from the valve opening of the first check valve can be secured, and at the same time, the amount of water passing through the first check valve. Can be kept low.
また請求項３では、第１の逆止弁の弁室内に流入した
水が大気開放口から流出するとき、水流は包囲壁に案内
されて効率良く大気開放口に向かって大気開閉弁をより
早く閉じるように作用するため、小さな水量でも、大気
開閉弁を容易に閉じることができる。Further, in claim 3, when the water flowing into the valve chamber of the first check valve flows out from the atmosphere opening port, the water flow is guided by the surrounding wall to efficiently move the atmosphere opening / closing valve toward the atmosphere opening port earlier. Since it acts so as to close, the atmosphere opening / closing valve can be easily closed even with a small amount of water.
［発明の効果］ 本発明では、第１の逆止弁へ水の流入が始まると、水
流によって大気開放弁が閉じる力を受けるため、速やか
に大気開放口を閉じることができる。[Effects of the Invention] In the present invention, when the flow of water into the first check valve starts, the water flow receives a force to close the atmosphere release valve, so that the atmosphere release port can be quickly closed.
従って、応答性が良くなるとともに、大気開放口から
外部へ流出する水を少なくすることができる。Therefore, the responsiveness is improved, and the amount of water flowing out from the atmosphere opening port can be reduced.
また、請求項２では、受水圧部に貫通口を設けたた
め、受水圧部が水路における抵抗となりにくくなり、受
水圧部によって第１の逆止弁を通過する水量を低下させ
ることなく、容易に大気開放弁を閉じることができる。Further, according to the second aspect, since the through-hole is provided in the water receiving pressure portion, the water receiving pressure portion is unlikely to become a resistance in the water channel, and the water receiving pressure portion does not reduce the amount of water passing through the first check valve, and can be easily The atmosphere release valve can be closed.
また、請求項３では、大気開放口の周囲に包囲壁を設
けたため、大気開放弁が大気開放口から離れた状態にあ
っても、大気開放弁を容易に閉じるように作用する。Further, according to the third aspect, since the surrounding wall is provided around the atmosphere opening port, the atmosphere opening valve acts to easily close the atmosphere opening valve even when the atmosphere opening valve is apart from the atmosphere opening port.
［実施例］ 次に本発明の逆流防止装置１を図面に示す実施例に基
づいて説明する。[Embodiment] Next, a backflow prevention device 1 of the present invention will be described based on an embodiment shown in the drawings.
第１図に示す第１実施例の逆流防止装置１は、第１逆
止弁10およびホッパ20が設けられた略円筒状の本体部２
と、本体部２に付設された第２逆止弁30とからなり、例
えば、第２図に示すような自動湯張りシステム100に用
いられる。The backflow prevention device 1 of the first embodiment shown in FIG. 1 is a substantially cylindrical main body portion 2 provided with a first check valve 10 and a hopper 20.
And a second check valve 30 attached to the main body 2, and is used, for example, in an automatic water filling system 100 as shown in FIG.
逆流防止装置１は、本体部２の上方端には、第１逆止
弁10に対して直角に折れ曲がって配された導入管３が本
体部２と一体に設けられ、導入管３の上流端は湯張り給
湯器101から温水を供給するための温水供給管102が接続
される。In the backflow prevention device 1, an introduction pipe 3 bent and arranged at a right angle to the first check valve 10 is provided integrally with the main body 2 at an upper end of the main body 2, and an upstream end of the introduction pipe 3 is provided. A hot water supply pipe 102 for supplying hot water from the hot water heater 101 is connected.
第１逆止弁10は、本体部２内を二分するようにして設
けられた弁室壁11と本体部２の上部とによって形成され
た上部弁室12内に、仕切り板13を備えたプランジャ14を
配したもので、プランジャ14の上部には、導入管３との
接続部となる流入口４を開閉するためのシール部材15が
備えられ、また、仕切り板13には、流入口４から流入す
る水を通過させる開口13aが形成されている。The first check valve 10 is a plunger provided with a partition plate 13 in an upper valve chamber 12 formed by a valve chamber wall 11 provided so as to divide the inside of the main body portion 2 and an upper portion of the main body portion 2. 14 is provided, and a seal member 15 for opening and closing the inflow port 4 serving as a connecting portion with the introduction pipe 3 is provided on the upper portion of the plunger 14, and the partition plate 13 is provided with An opening 13a is formed through which the inflowing water passes.
ここでは、プランジャ14に備えられたシール部材15に
よって開閉される流入口４の面積に対して、仕切り板13
の面積を十分に大きくするとともに、仕切り板13の外周
に流入口４側へ折り曲げた水受け部13bが形成されてい
るため、流入する水に対するプランジャ14の応答性を良
くすることができる。Here, with respect to the area of the inflow port 4 opened and closed by the seal member 15 provided in the plunger 14, the partition plate 13
In addition to sufficiently increasing the area, the water receiving portion 13b bent to the inflow port 4 side is formed on the outer periphery of the partition plate 13, so that the responsiveness of the plunger 14 to the inflowing water can be improved.
上部弁室12を形成する弁室壁11には、大気と連通する
ための大気開放口11Aが形成されていて、本体部２下部
には、大気開放口11Aから流出する水を溜めるホッパ20
が、弁室壁11によって形成されている。The valve chamber wall 11 forming the upper valve chamber 12 is formed with an atmosphere opening port 11A for communicating with the atmosphere, and a hopper 20 for collecting water flowing out from the atmosphere opening port 11A is formed in the lower portion of the main body 2.
Is formed by the valve chamber wall 11.
大気開放口11Aは、プランジャ14の下端に備えられた
大気開放弁16によって開閉される。The atmosphere opening port 11A is opened and closed by an atmosphere opening valve 16 provided at the lower end of the plunger 14.
ここでは、大気開放弁16は、プランジャ14に備えられ
た仕切り板13に比較して十分小さく設定されている。Here, the atmosphere release valve 16 is set sufficiently smaller than the partition plate 13 provided in the plunger 14.
弁室壁11には、大気開放弁16を取り囲むとともに、上
端にプランジャ14を摺動支持するための包囲壁17が上部
弁室12内に向かって設けられ、包囲壁17にはプランジャ
支持部17aが備えられ、プランジャ支持部17aには、上部
弁室12と大気開放口11Aとを連通する連通部17bが形成さ
れている。The valve chamber wall 11 is provided with an envelope wall 17 surrounding the atmosphere release valve 16 and for slidingly supporting the plunger 14 at the upper end toward the upper valve chamber 12, and the envelope wall 17 has a plunger support portion 17a. The plunger support portion 17a is provided with a communication portion 17b that connects the upper valve chamber 12 and the atmosphere opening port 11A.
プランジャ14は、プランジャ支持部17aとの間にばね1
8が配され、プランジャ14は流入口４へ向かって付勢さ
れていて、流入口４から水の供給がない場合には、シー
ル部材15によって流入口４を閉塞する。The plunger 14 is connected to the plunger support portion 17a by the spring 1
8 is provided, the plunger 14 is biased toward the inflow port 4, and when there is no water supply from the inflow port 4, the seal member 15 closes the inflow port 4.
また、ここでは、大気開放弁16がプランジャ14の下端
に備えられていて、流入口４が閉塞されるときには、大
気開放口11Aが開放される。Further, here, the atmosphere opening valve 16 is provided at the lower end of the plunger 14, and when the inflow port 4 is closed, the atmosphere opening port 11A is opened.
逆に、流入口４から水が流入して、プランジャ14が下
方端へ移動した場合には、大気開放口11Aが閉塞され
る。On the contrary, when water flows in through the inflow port 4 and the plunger 14 moves to the lower end, the atmosphere opening port 11A is closed.
このように、流入口４と大気開放口11Aとは、互いに
可逆的に閉塞し、一方が閉塞している場合には、他方は
必ず開放状態になるが、流入口４から流入する水の流量
が少ない場合、例えば３／分以下の場合には、プラン
ジャ14は必ずしも下端まで移動するとは限らず、その場
合には、流入口４と大気開放口11Aがともに開放状態と
なりうる。As described above, the inlet 4 and the atmosphere opening 11A are reversibly closed, and when one is closed, the other is always open, but the flow rate of water flowing from the inlet 4 When the amount is small, for example, 3 / min or less, the plunger 14 does not always move to the lower end, and in that case, both the inflow port 4 and the atmosphere opening port 11A can be opened.
以上の構成において、流入口４から水の流入が始まっ
たときに、上部弁室12内に流入した水は、大気開放口11
Aからホッパ20へ向かって噴出するが、ここでは、水が
大気開放口11Aから噴出する際に生じる水流によって大
気開放弁16を大気開放口11A方向へ押し付ける力が発生
する。In the above configuration, when the water starts to flow from the inlet 4, the water flowing into the upper valve chamber 12 is
Although it spouts from A toward the hopper 20, here, a force that presses the air release valve 16 toward the air release port 11A is generated by the water flow generated when water spouts from the air release port 11A.
この場合、大気開放口11Aを開閉する大気開放弁16が
包囲壁17内に配されているため、包囲壁17内の水流の向
きが、大気開放口11A方向になりやすい。In this case, since the atmosphere opening valve 16 that opens and closes the atmosphere opening port 11A is arranged in the surrounding wall 17, the direction of the water flow in the surrounding wall 17 tends to be toward the atmosphere opening port 11A.
この結果、プランジャ14には、上記の仕切り板13によ
って流入口４を開こうとする力と、大気開放弁16によっ
て大気開放口11Aを閉じようとする力とが、同時に同じ
方向に働くため、プランジャ14を速やかに下端まで移動
させることができる。As a result, the force of opening the inflow port 4 by the partition plate 13 and the force of closing the atmosphere opening port 11A by the atmosphere opening valve 16 act on the plunger 14 in the same direction at the same time. The plunger 14 can be quickly moved to the lower end.
また、大気開放弁16が小さいため、上部弁室12内の水
に対する大気開放弁16の抵抗が小さくなる。従って、流
入口４から上部弁室12内への水の流入が停止したとき、
上部弁室12内の水によって大気開放弁16が抵抗を受け難
くなり、第１逆止弁10を閉じ易くすることができる。Further, since the atmosphere release valve 16 is small, the resistance of the atmosphere release valve 16 to water in the upper valve chamber 12 becomes small. Therefore, when the inflow of water from the inflow port 4 into the upper valve chamber 12 is stopped,
Water in the upper valve chamber 12 makes it difficult for the atmosphere release valve 16 to receive resistance, so that the first check valve 10 can be easily closed.
上部弁室12の側壁12aには、上部弁室12内に流入した
水が流出する流出管12bが形成されていて、流出管12bの
下流には、第２逆止弁30が接続されている。The side wall 12a of the upper valve chamber 12 is formed with an outflow pipe 12b through which water that has flowed into the upper valve chamber 12 flows out, and a second check valve 30 is connected downstream of the outflow pipe 12b. .
本実施例では、逆流防止装置１の導入管３の上流に
は、湯張り給湯器101からの温水の供給を停止するため
に湯張り弁103が設けられ、また、本体部２内に残った
水の連結によって、その後の給湯ができなくなることが
ないようにするために、湯張り弁103が閉じられた後に
は、浴槽Ｂ内の温水の再加熱を行うために第２逆止弁30
の下流側に設けられる浴槽循環用のポンプ104を利用し
て、上部弁室12内に残った水がすべて外部へ吸い出され
る。In this embodiment, a water filling valve 103 for stopping the supply of hot water from the water filling water heater 101 is provided upstream of the introduction pipe 3 of the backflow prevention device 1, and is left in the main body 2. In order to prevent the hot water supply from becoming impossible due to the water connection, after the water filling valve 103 is closed, the second check valve 30 is provided to reheat the hot water in the bathtub B.
All of the water remaining in the upper valve chamber 12 is sucked out to the outside by using the bathtub circulation pump 104 provided on the downstream side of the.
このとき、上部弁室12内の水を、確実にポンプ104で
吸い出すために、本実施例の逆流防止装置１は、第１図
のとおり、本体部２の第１逆止弁10がホッパ20の上方に
位置するように、設置されることを前提に設計されてい
て、さらに、弁室壁11の上部弁室12側の弁室面11aを、
流出管12bの反対側に当たる上流部11bを高くして、流出
管12b側に当たる弁室壁11の下流部11cを上流部11bより
低くすることによって、上部弁室12内に残った水が容易
に外部へ流出できるようにしている。At this time, in order to ensure that the water in the upper valve chamber 12 is sucked out by the pump 104, the check valve 1 of the present embodiment is configured so that the first check valve 10 of the main body 2 has the hopper 20 as shown in FIG. It is designed on the assumption that it is installed so as to be located above the valve chamber surface 11a of the valve chamber wall 11 on the upper valve chamber 12 side.
By increasing the upstream portion 11b that is on the opposite side of the outflow pipe 12b and making the downstream portion 11c of the valve chamber wall 11 that is on the outflow pipe 12b side lower than the upstream portion 11b, the water remaining in the upper valve chamber 12 can be easily It is designed to be leaked to the outside.
ここでは、弁室面11aが、上流部11bから下流部11cに
向かって次第に低くなるように傾斜させてあるが、必ず
しも流出管12bの反対側を最も高くする必要はなく、最
も高い面から下流部11cに向かって一様な傾斜となって
いて、下流部11cが最も低くなるようにしてあればよ
い。Here, the valve chamber surface 11a is inclined so as to gradually lower from the upstream portion 11b toward the downstream portion 11c, but it is not always necessary to make the opposite side of the outflow pipe 12b the highest, and the downstream from the highest surface. It suffices that the inclination be uniform toward the portion 11c so that the downstream portion 11c has the lowest height.
ホッパ20は、大気開放口11Aを介して上部弁室12から
流出する水を一時的に溜めるとともに、大気と連通した
空気室20aを形成している。The hopper 20 temporarily stores the water flowing out from the upper valve chamber 12 through the atmosphere opening port 11A and forms an air chamber 20a communicating with the atmosphere.
ここでは、ホッパ20の高さ方向の中間に、ホッパ20内
の水を、外部下方へ薄く外部誘導管21が接続され、外部
誘導管21の先端部は、大気中に開放された外部開放口21
aとなっている。Here, in the middle of the height direction of the hopper 20, the water in the hopper 20 is thinly connected to the outside by an external guide tube 21, and the tip of the external guide tube 21 has an external opening that is open to the atmosphere. twenty one
It is a.
この結果、大気開放弁16が大気開放口11Aを開いてい
る場合には、上部弁室12は大気と連通される。As a result, when the atmosphere opening valve 16 opens the atmosphere opening port 11A, the upper valve chamber 12 communicates with the atmosphere.
ホッパ20の下端には、ホッパ20内の水を排出するため
の排出口22が設けられ、さらに排出口22には、電磁弁23
を備えた排出管24が接続されている。A discharge port 22 for discharging the water in the hopper 20 is provided at the lower end of the hopper 20, and the discharge port 22 further includes a solenoid valve 23.
A discharge pipe 24 equipped with is connected.
排出管24は、第２逆止弁30の下流側とともに浴槽循環
用のポンプ104の吸入側に接続され、湯張り給湯器101か
らの温水の供給が停止した後に、電磁弁23を開いてホッ
パ20内の水が吸い出される。The discharge pipe 24 is connected to the suction side of the bathtub circulation pump 104 together with the downstream side of the second check valve 30. After the hot water supply from the hot water heater 101 is stopped, the solenoid valve 23 is opened to open the hopper. Water in 20 is sucked out.
電磁弁23は、上部弁室12および第２逆止弁30内の水を
ポンプ104によって吸い出す際に、大気と連通したホッ
パ20を介して、空気が吸い込まれてしまうことがないよ
うにするために、ホッパ20とポンプ104との連通をなく
すためのものであり、周知のとおり、電磁コイル、ば
ね、プランジャ等からなる。The solenoid valve 23 prevents air from being sucked through the hopper 20 communicating with the atmosphere when the water in the upper valve chamber 12 and the second check valve 30 is sucked by the pump 104. In addition, it is for eliminating the communication between the hopper 20 and the pump 104, and is composed of an electromagnetic coil, a spring, a plunger, etc., as is well known.
第２逆止弁30は、流出管12bから下方へ向かって弁室3
1が形成され、弁室31内には、ばね32によって上流側へ
押圧支持された弁体33が配され、弁体33のシール部材34
によって弁座35を開閉する。The second check valve 30 is provided in the valve chamber 3 downward from the outflow pipe 12b.
1 is formed, and the valve body 33, which is pressed and supported by the spring 32 toward the upstream side, is arranged in the valve chamber 31, and the seal member 34 of the valve body 33 is formed.
The valve seat 35 is opened and closed by.
ここでは、第２逆止弁30では、流入口４から第１逆止
弁10へ水が流入しても、第１逆止弁10のプランジャ14が
下端へ移動するまで、すなわち大気開放口11Aが閉塞さ
れないで流出管12b内の圧力が低く、弁体33への荷重が
小さい間は弁座35が閉じられていて、大気開放口11Aが
閉塞されて流出管12b内の圧力が高くなったときに初め
て弁座35が開かれるように、弁体33への荷重に対するば
ね32の弾性特性が設定されている。Here, in the second check valve 30, even if water flows from the inlet 4 to the first check valve 10, the plunger 14 of the first check valve 10 moves to the lower end, that is, the atmosphere opening port 11A. Is not blocked, the pressure in the outflow pipe 12b is low, the valve seat 35 is closed while the load on the valve element 33 is small, the atmosphere opening port 11A is blocked, and the pressure in the outflow pipe 12b becomes high. The elastic characteristic of the spring 32 with respect to the load on the valve element 33 is set so that the valve seat 35 is opened only for the first time.
なお、第２図において、105は追焚き用の風呂給湯
器、106は浴槽Ｂ内の水位を検知する水位センサ、107、
108は、湯張りと追焚きとの切り替えや、水位検出のた
めに必要に応じて開閉される二方弁である。In FIG. 2, 105 is a bath water heater for additional heating, 106 is a water level sensor for detecting the water level in bathtub B, 107,
Reference numeral 108 is a two-way valve that is opened / closed as necessary for switching between hot water filling and reheating and water level detection.
以上の構成からなる本実施例の逆流防止装置１は、湯
張り弁103が開いて湯張りが始まると、第１逆止弁10で
は流入口４から上部弁室12内へ温水が流入し、その一部
は大気開放口11Aからホッパ20へ流出、噴出する。In the backflow prevention device 1 of the present embodiment configured as described above, when the water filling valve 103 is opened and water filling starts, hot water flows from the inflow port 4 into the upper valve chamber 12 in the first check valve 10. A part of the gas flows out from the atmosphere opening port 11A to the hopper 20 and gushes out.
このとき、包囲壁17内では、大気開放口11Aから流出
する温水の勢いによって大気開放弁16がプランジャ14を
下方へ移動させるため、流入口４からの通水圧、すなわ
ち流入流量が少なく流出管12b内に温水が充満しないう
ちに大気開放弁16によって大気開放口11Aを閉塞するこ
とができる。At this time, in the surrounding wall 17, since the atmosphere opening valve 16 moves the plunger 14 downward by the momentum of the hot water flowing out from the atmosphere opening port 11A, the water pressure from the inflow port 4, that is, the inflow flow rate is small and the outflow pipe 12b. The atmosphere opening valve 16 can close the atmosphere opening port 11A before hot water is filled therein.
大気開放口11Aが閉塞されて、流出管12b内の圧力が高
くなると、第２逆止弁30が開き、温水を浴槽Ｂへ供給す
ることができる。When the atmosphere opening port 11A is closed and the pressure in the outflow pipe 12b increases, the second check valve 30 opens and hot water can be supplied to the bath B.
また、湯張り給湯器101へ水を供給する上水道におい
て、断水が発生して、浴槽Ｂから水が逆流した場合に
は、逆流防止装置１において、第２逆止弁30で逆流が防
止される。In addition, when water is cut off in the water supply that supplies water to the hot water heater 101 and water flows back from the bathtub B, the backflow is prevented by the second check valve 30 in the backflow prevention device 1. .
このとき、万一、第２逆止弁30に異常があった場合に
は、逆流した水は、大気開放口11Aからホッパ20を介し
て外部開放口21aから外部に排出される。At this time, in the unlikely event that the second check valve 30 is abnormal, the backflow water is discharged from the atmosphere opening port 11A to the outside through the hopper 20 and the external opening port 21a.
以上のとおり、本発明では、大気開放弁16は、仕切り
板13に対して十分に小さいため、流入する水に敏感に反
応して、反応性良く速やかに大気開放口11Aを閉じるこ
とができる。As described above, in the present invention, since the atmosphere opening valve 16 is sufficiently small with respect to the partition plate 13, it is possible to react sensitively to inflowing water, and to close the atmosphere opening port 11A quickly with good reactivity.
従って、ホッパ20を介して外部へ流出する水を少なく
することができる。Therefore, the amount of water flowing out to the outside through the hopper 20 can be reduced.
第３図に本発明の第２実施例を示す。 FIG. 3 shows a second embodiment of the present invention.
第２実施例では、大気開放弁16に対応する部分の弁室
壁11をホッパ20の空気室20a内に突出させて包囲壁17を
形成し、大気開放口11Aを弁室面11aの下流部11cよりさ
らに低くしている。In the second embodiment, the valve chamber wall 11 corresponding to the atmosphere opening valve 16 is projected into the air chamber 20a of the hopper 20 to form the surrounding wall 17, and the atmosphere opening port 11A is located downstream of the valve chamber surface 11a. It is lower than 11c.
また、包囲壁17には、上部弁室12内の流出管12b側
に、スリット17cを設けている。Further, the surrounding wall 17 is provided with a slit 17c on the outflow pipe 12b side in the upper valve chamber 12.
さらに、上部弁室12に通じる流出管12bが弁室面11aよ
り下がるように傾斜して形成され、第２逆止弁30の下流
側の流出部36と排出管24とが合流した流出管42が形成さ
れている。Further, the outflow pipe 12b communicating with the upper valve chamber 12 is formed to be inclined so as to be lower than the valve chamber surface 11a, and the outflow pipe 42 where the outflow portion 36 on the downstream side of the second check valve 30 and the exhaust pipe 24 join together. Are formed.
なお、第２実施例では、外部開放口21aへ通じる外部
誘導管21は、ホッパ20の底を突き抜けていて、空気室20
a内に外部誘導口21bが設けられている。In the second embodiment, the external guide pipe 21 leading to the external opening 21a penetrates the bottom of the hopper 20 and the air chamber 20
An external guide port 21b is provided in a.
上記の実施例では、ホッパの排出管に電磁弁を備えた
ものを示したが、逆止弁にしてもよい。In the above embodiment, the discharge pipe of the hopper is provided with the electromagnetic valve, but a check valve may be used.
第１図は本発明の第１実施例を示す逆流防止装置を示す
断面図、第２図は本実施例の逆流防止装置を用いた自動
湯張りシステムを示す概略図、第３図は本発明の第２実
施例を示す逆流防止装置の断面図である。 図中、１……逆流防止装置、10……第１逆止弁（第１の
逆止弁）、11A……大気開放口、12……上部弁室（弁
室）、13……仕切り板（弁対）、14……プランジャ（弁
体）、16……大気開放弁、30……第２逆止弁（第２の逆
止弁）、102……温水供給管（水路）。FIG. 1 is a sectional view showing a backflow prevention device showing a first embodiment of the present invention, FIG. 2 is a schematic view showing an automatic water filling system using the backflow prevention device of this embodiment, and FIG. 3 is a view showing the present invention. It is sectional drawing of the backflow prevention apparatus which shows 2nd Example of this. In the figure, 1 ... Backflow prevention device, 10 ... First check valve (first check valve), 11A ... Atmosphere opening port, 12 ... Upper valve chamber (valve chamber), 13 ... Partition plate (Valve pair), 14 ... Plunger (valve body), 16 ... Atmosphere release valve, 30 ... Second check valve (second check valve), 102 ... Hot water supply pipe (water channel).
Claims (3)
して順方向に直列に設けられ、前記第１の逆止弁と前記
第２の逆止弁との間に大気と通じるための大気開放口が
形成されて逆流防止装置において、 前記大気開放口を前記第１の逆止弁の弁体が配された弁
室に形成し、前記大気開放口を開閉する大気開放弁を前
記弁体と一体に設けて、前記第１の逆止弁と前記大気開
放口とを可逆的に開閉させるとともに、前記弁体が開閉
する弁口および前記大気開閉弁より大きく設定され前記
弁口から流入する水の水圧を受る受水圧部を前記弁口に
関与しないように前記弁体の周囲に備えたことを特徴と
する逆流防止装置。1. A first check valve and a second check valve are provided in series in a forward direction with respect to a water channel, and between the first check valve and the second check valve. In the backflow prevention device, wherein an atmosphere opening port for communicating with the atmosphere is formed, the atmosphere opening port is formed in a valve chamber in which the valve body of the first check valve is arranged, and the atmosphere opening port is opened and closed. An atmosphere opening valve is provided integrally with the valve body to reversibly open and close the first check valve and the atmosphere opening port, and is set larger than the valve opening and the atmosphere opening and closing valve of the valve body. A backflow prevention device, comprising: a water pressure receiving portion, which receives a water pressure of water flowing in from the valve opening, around the valve body so as not to participate in the valve opening.
とする請求項１記載の逆流防止装置。2. The backflow prevention device according to claim 1, wherein the water pressure receiving portion is provided with a through hole.
との間に間隙を有する包囲壁を設けたことを特徴とする
請求項１記載の逆流防止装置。3. The backflow prevention device according to claim 1, wherein an enclosing wall having a gap with the atmosphere opening valve is provided around the atmosphere opening port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2081779A JPH0820120B2 (en) | 1990-03-29 | 1990-03-29 | Backflow prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2081779A JPH0820120B2 (en) | 1990-03-29 | 1990-03-29 | Backflow prevention device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03282154A JPH03282154A (en) | 1991-12-12 |
| JPH0820120B2 true JPH0820120B2 (en) | 1996-03-04 |
Family
ID=13755966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2081779A Expired - Fee Related JPH0820120B2 (en) | 1990-03-29 | 1990-03-29 | Backflow prevention device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0820120B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002168365A (en) | 2000-12-01 | 2002-06-14 | Aisan Ind Co Ltd | Pilot type passage opening/closing valve provided with backflow protective function |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0620425B2 (en) * | 1987-12-24 | 1994-03-23 | 株式会社ノーリツ | Waterway backflow prevention device |
| JPH0447553Y2 (en) * | 1988-06-09 | 1992-11-10 |
-
1990
- 1990-03-29 JP JP2081779A patent/JPH0820120B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03282154A (en) | 1991-12-12 |
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