JP4597918B2 - Water supply valve device - Google Patents

Water supply valve device Download PDF

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JP4597918B2
JP4597918B2 JP2006176431A JP2006176431A JP4597918B2 JP 4597918 B2 JP4597918 B2 JP 4597918B2 JP 2006176431 A JP2006176431 A JP 2006176431A JP 2006176431 A JP2006176431 A JP 2006176431A JP 4597918 B2 JP4597918 B2 JP 4597918B2
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valve
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water supply
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JP2008008319A (en
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一幸 雨宮
秋仁 蜂矢
昭男 中道
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Rinnai Corp
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Description

本発明は、食器洗浄機といった水を使用する機器の給水路に設けられる給水弁装置に関する。   The present invention relates to a water supply valve device provided in a water supply channel of a device that uses water such as a dishwasher.

食器洗浄機は、洗浄槽に給水路を介して水を供給するように構成されており、この給水路に電磁弁から成る給水弁を介設している。ここで、給水弁が故障や異物の噛み込み等で止水不良を生ずると、洗浄槽への給水が継続して、洗浄槽から水が溢れ出る漏水事故を生ずることがある。   The dishwasher is configured to supply water to the washing tank through a water supply channel, and a water supply valve including an electromagnetic valve is provided in the water supply channel. Here, if the water supply valve fails to stop water due to a failure or biting of foreign matter, water supply to the cleaning tank may continue and a water leakage accident may occur in which water overflows from the cleaning tank.

そのため、従来、給水路に設けられる給水弁装置として、直列に接続された上流側の第１電磁弁と下流側の第２電磁弁とを備えものが知られている(例えば、特許文献１参照)。これによれば、第１と第２の両電磁弁の一方の電磁弁の止水不良を生じても他方の電磁弁により給水を停止でき、漏水事故が発生する可能性を可及的に低減できる。   Therefore, conventionally, as a water supply valve device provided in a water supply channel, one having an upstream first electromagnetic valve and a downstream second electromagnetic valve connected in series is known (see, for example, Patent Document 1). ). According to this, even if the water stop failure of one of the first and second solenoid valves occurs, water supply can be stopped by the other solenoid valve, and the possibility of a water leakage accident is reduced as much as possible. it can.

ここで、両電磁弁が同時に止水不良を生じないようにするには、第１電磁弁と第２電磁弁とを互いに異なる型式のものにすること、例えば、第１と第２の両電磁弁の一方をパイロット式電磁弁で構成し、他方の電磁弁を直動式電磁弁で構成することが望まれる。   Here, in order to prevent both solenoid valves from causing a water stop failure at the same time, the first solenoid valve and the second solenoid valve are of different types, for example, both the first and second solenoid valves. It is desired that one of the valves is constituted by a pilot solenoid valve and the other solenoid valve is constituted by a direct acting solenoid valve.

パイロット式電磁弁は、弁座に開設した主弁孔を開閉するダイヤフラムから成る主弁と、主弁の背面側に画成され、弁座の周囲に形成した流入室にオリフィス孔を介して連通する背圧室と、背圧室と主弁孔とを連通するパイロット弁孔を開閉するパイロット弁と、パイロット弁を開閉駆動するソレノイドとを備える電磁弁である。パイロット弁を閉弁させると、流入室からオリフィス孔を介して背圧室に流入する水が背圧室に封じ込められ、主弁の背面に作用する背圧室の水圧による押圧力が主弁の前面に作用する流入室の水圧による押圧力を上回って主弁が閉弁され、パイロット弁を開弁させると、背圧室内の水がパイロット弁孔を介して流出し、主弁の背面に作用する押圧力が主弁の前面に作用する押圧力を下回って主弁が開弁され、流入室から主弁孔に水が流れる。パイロット式電磁弁は、小型のパイロット弁の開弁で主弁を開弁させて大流量の水を流すことができる。そのため、ソレノイドを小型化して消費電力を少なくできる利点がある。反面、給水圧が低い場合には、パイロット弁を閉弁させても、主弁の閉じ側への押圧力が不足して、異物の噛み込みによる止水不良を生じやすくなる。また、オリフィス孔が目詰まりしやすく、この目詰まりにより背圧室に水が流入しにくくなって、止水不良を生ずることもある。   The pilot type solenoid valve is defined on the back side of the main valve, which is a diaphragm that opens and closes the main valve hole established in the valve seat, and communicates with the inflow chamber formed around the valve seat via the orifice hole. A back pressure chamber, a pilot valve that opens and closes a pilot valve hole that communicates the back pressure chamber and the main valve hole, and a solenoid that opens and closes the pilot valve. When the pilot valve is closed, the water flowing into the back pressure chamber from the inflow chamber through the orifice hole is contained in the back pressure chamber, and the pressure due to the water pressure of the back pressure chamber acting on the back of the main valve is When the main valve closes and the pilot valve is opened, the water pressure in the back pressure chamber flows out through the pilot valve hole and acts on the back of the main valve. When the pressing force is lower than the pressing force acting on the front surface of the main valve, the main valve is opened, and water flows from the inflow chamber to the main valve hole. A pilot type solenoid valve can open a main valve by opening a small pilot valve to flow a large flow of water. Therefore, there is an advantage that the solenoid can be downsized to reduce power consumption. On the other hand, when the water supply pressure is low, even if the pilot valve is closed, the pressing force toward the closing side of the main valve is insufficient, and water stoppage failure due to the biting of foreign matter is likely to occur. In addition, the orifice hole is likely to be clogged, and this clogging may make it difficult for water to flow into the back pressure chamber, resulting in poor water stoppage.

また、直動式電磁弁は、弁孔を開閉する弁体と、弁体を開閉駆動するソレノイドとを備える電磁弁であり、給水圧が低い場合でも止水不良を生じない。然し、所要の流量の水を流すには弁孔の孔径を大きくする必要があって、弁体も大径になるため、弁体に作用する給水圧による閉じ側への押圧力が大きくなり、給水圧が高い場合に開弁不良を生じやすくなる。開弁不良を防止するには、ソレノイドを大型化する必要があり、消費電力が増大する。   Further, the direct acting solenoid valve is a solenoid valve including a valve body that opens and closes a valve hole and a solenoid that drives the valve body to open and close, and does not cause a water stop failure even when the supply water pressure is low. However, it is necessary to increase the hole diameter of the valve hole in order to flow the required flow of water, and the valve body also has a large diameter, so the pressing force to the closing side due to the feed water pressure acting on the valve body increases, When the feed water pressure is high, valve opening failure is likely to occur. In order to prevent the valve opening failure, it is necessary to enlarge the solenoid, which increases power consumption.

ここで、上流側の第１電磁弁をパイロット式電磁弁、下流側の第２電磁弁を直動式電磁弁で構成すると共に、第２電磁弁を給水圧を受けない状態で開弁できるように、給水開始時に第１と第２の両電磁弁を第２電磁弁、第１電磁弁の順で時間差を存して開弁することが考えられる。然し、両電磁弁が閉弁されている給水停止中に、給水路の上流端を接続する家屋の水道配管でウォータハンマーが発生すると、第１電磁弁たるパイロット式電磁弁の主弁がウォータハンマーによる水圧変化で一時的に開弁して、第１電磁弁と第２電磁弁との間の連通路に水が流入し、連通路の水圧が上昇する。そのため、第２電磁弁のソレノイドが小型であると、連通路の水圧の影響で第２電磁弁の開弁不良を生ずる可能性がある。従って、第２電磁弁のソレノイドを小型化して消費電力の低減を図ることはできない。
特開２０００−１３９８０８号公報 Here, the upstream first solenoid valve is a pilot solenoid valve, the downstream second solenoid valve is a direct acting solenoid valve, and the second solenoid valve can be opened without receiving a feed water pressure. In addition, it is conceivable that both the first and second solenoid valves are opened with a time difference in the order of the second solenoid valve and the first solenoid valve at the start of water supply. However, if a water hammer occurs in the water supply pipe of a house that connects the upstream end of the water supply channel while the water supply is stopped while both solenoid valves are closed, the main valve of the pilot solenoid valve that is the first solenoid valve is the water hammer. The valve is temporarily opened due to a change in water pressure due to the water, and water flows into the communication path between the first solenoid valve and the second solenoid valve, and the water pressure in the communication path rises. Therefore, if the solenoid of the second solenoid valve is small, there is a possibility that the opening failure of the second solenoid valve may occur due to the influence of the water pressure in the communication path. Therefore, it is impossible to reduce the power consumption by reducing the size of the solenoid of the second solenoid valve.
JP 2000-139808 A

本発明は、以上の点に鑑み、上流側の第１電磁弁をパイロット式電磁弁、下流側の第２電磁弁を直動式電磁弁で構成する給水弁装置において、第２電磁弁を水圧を受けない状態で開弁させられるようにして、第２電磁弁のソレノイドの小型化による消費電力の低減を図れるようにすることをその課題としている。   In view of the above, the present invention provides a water supply valve device in which a first solenoid valve on the upstream side is a pilot solenoid valve, and a second solenoid valve on the downstream side is a direct acting solenoid valve. An object of the present invention is to reduce the power consumption by reducing the size of the solenoid of the second solenoid valve so that the valve can be opened in a state in which the valve is not subjected to the above.

上記課題を解決するために、本発明は、水を使用する機器の給水路に設けられる給水弁装置であって、直列に接続された上流側の第１電磁弁と下流側の第２電磁弁とを備え、第１電磁弁は、弁座に開設した主弁孔を開閉するダイヤフラムから成る主弁と、主弁の背面側に画成され、弁座の周囲に形成した流入室にオリフィス孔を介して連通する背圧室と、背圧室と主弁孔とを連通するパイロット弁孔を開閉するパイロット弁と、パイロット弁を開閉駆動するソレノイドとを備えるパイロット式電磁弁で構成され、第２電磁弁は、第１電磁弁の下流側に位置する弁孔を開閉する弁体と、弁体を開閉駆動するソレノイドとを備える直動式電磁弁で構成されるものにおいて、第２電磁弁に並列の第３電磁弁を備え、第３電磁弁は、第２電磁弁の弁孔より小径の弁孔を開閉する弁体と、弁体を開閉駆動するソレノイドとを備える直動式電磁弁で構成され、給水開始時に、第１乃至第３電磁弁を第３電磁弁、第２電磁弁、第１電磁弁の順で時間差を存して開弁させることを特徴とする。   In order to solve the above-described problems, the present invention provides a water supply valve device provided in a water supply path of a device that uses water, the first electromagnetic valve on the upstream side and the second electromagnetic valve on the downstream side connected in series. The first solenoid valve includes a main valve comprising a diaphragm that opens and closes the main valve hole that is opened in the valve seat, and an orifice hole that is defined on the back side of the main valve and is formed in the inflow chamber formed around the valve seat. A pilot pressure solenoid valve comprising: a back pressure chamber that communicates with the pilot valve; a pilot valve that opens and closes a pilot valve hole that communicates the back pressure chamber and the main valve hole; and a solenoid that opens and closes the pilot valve. The 2 solenoid valve is composed of a direct acting solenoid valve including a valve body that opens and closes a valve hole located on the downstream side of the first solenoid valve and a solenoid that opens and closes the valve body. A third solenoid valve in parallel with the third solenoid valve, the third solenoid valve being a valve hole of the second solenoid valve. A direct acting solenoid valve having a valve body that opens and closes a small-diameter valve hole and a solenoid that opens and closes the valve body, and at the start of water supply, the first to third solenoid valves are the third solenoid valve and the second solenoid valve. The valve is opened in the order of the solenoid valve and the first solenoid valve with a time difference.

本発明によれば、給水停止中に第１と第２の両電磁弁間の連通路の水圧が上昇しても、給水開始時に先ず第３電磁弁が開弁されるため、連通路が第３電磁弁を介して圧抜きされ、第２電磁弁は水圧を受けずに開弁されることになる。従って、直動式電磁弁から成る第２電磁弁のソレノイドを小型化して、消費電力を大幅に低減できる。   According to the present invention, even if the water pressure in the communication path between the first and second solenoid valves increases during the stoppage of water supply, the third solenoid valve is first opened at the start of water supply. The pressure is released through the three solenoid valves, and the second solenoid valve is opened without receiving water pressure. Therefore, the solenoid of the second solenoid valve composed of a direct acting solenoid valve can be reduced in size, and the power consumption can be greatly reduced.

尚、第３電磁弁は水圧を受けた状態で開弁されることになる。ここで、給水時の流量は第２電磁弁の弁孔を大きくすることで確保できるため、第２電磁弁に並列の第３電磁弁の弁孔は圧抜き可能な範囲で可及的に小さく形成でき、第３電磁弁の弁体も小径になる。従って、第３電磁弁のソレノイドが小型であっても、第３電磁弁の開弁不良は生じない。その結果、第３電磁弁の付加による消費電力の増加量は僅かになり、第２電磁弁のソレノイドの小型化による消費電力の大幅な低減で、トータルの消費電力も低減される。   Note that the third solenoid valve is opened in a state of receiving water pressure. Here, since the flow rate at the time of water supply can be secured by enlarging the valve hole of the second solenoid valve, the valve hole of the third solenoid valve parallel to the second solenoid valve is as small as possible within the range where pressure can be released. It can be formed, and the valve body of the third solenoid valve also has a small diameter. Therefore, even if the solenoid of the third solenoid valve is small, the opening failure of the third solenoid valve does not occur. As a result, the amount of increase in power consumption due to the addition of the third solenoid valve is small, and the total power consumption is also reduced by a significant reduction in power consumption due to the miniaturization of the solenoid of the second solenoid valve.

また、第３電磁弁は第２電磁弁の開弁前に連通路を圧抜きするための弁であるから、第２電磁弁の開弁後は第３電磁弁を閉弁させても良い。これによれば、給水中は第３電磁弁のソレノイドに通電せずに済むため、消費電力を一層低減できる。   Further, since the third solenoid valve is a valve for releasing the pressure of the communication path before the second solenoid valve is opened, the third solenoid valve may be closed after the second solenoid valve is opened. According to this, since it is not necessary to energize the solenoid of the third solenoid valve during water supply, power consumption can be further reduced.

ところで、給水路に第１乃至第３電磁弁を個別に配管接続することも可能であるが、これでは電磁弁の接続作業が面倒になる。そのため、第１乃至第３電磁弁を共通のバルブハウジングに配置することが望ましい。この場合、給水停止時に第１と第２の両電磁弁間の連通路に残留する水が凍結すると、バルブハウジングの破損を生ずる虞がある。ここで、第３電磁弁の弁孔を第２電磁弁の弁孔より鉛直方向下方に設け、給水停止時に、第１電磁弁と第２電磁弁との閉弁後所定時間経過するまで第３電磁弁を開弁させるようにすれば、連通路に残留する水が第３電磁弁の閉弁前に該弁を介して排水される。これにより、残留水の凍結によるバルブハウジングの破損を防止できる。   By the way, although it is possible to individually connect the first to third solenoid valves to the water supply channel, this makes the work of connecting the solenoid valves troublesome. Therefore, it is desirable to arrange the first to third electromagnetic valves in a common valve housing. In this case, when water remaining in the communication path between the first and second solenoid valves freezes when the water supply is stopped, the valve housing may be damaged. Here, the valve hole of the third solenoid valve is provided vertically below the valve hole of the second solenoid valve, and when the water supply is stopped, the third solenoid valve is closed until a predetermined time elapses after the first solenoid valve and the second solenoid valve are closed. If the solenoid valve is opened, the water remaining in the communication path is drained through the valve before the third solenoid valve is closed. Thereby, damage to the valve housing due to freezing of residual water can be prevented.

図１は、本発明の実施形態の給水弁装置を具備する食器洗浄機を示している。この食器洗浄機は、外装ケース１と、外装ケース１内の洗浄槽２とを備えており、この洗浄槽２内に給水路３を介して水が供給される。洗浄槽２には、食器類Ｗを載置する食器カゴ２ａと、食器カゴ２ａに向けて洗浄水を噴射する洗浄ノズル４と、ヒータ５とが設けられており、また、洗浄槽１の下側には、洗浄槽２の底部に残菜フィルタ６を介して接続される洗浄・排水ポンプ７が設けられている。そして、洗浄・排水ポンプ７を正転させることにより洗浄水を洗浄ノズル４を介して洗浄槽２内に循環させ、洗浄・排水ポンプ７を逆転させることにより洗浄槽２内の洗浄水を排水路８を介して排水するようにしている。排水路８には、逆流防止のための逆Ｕ字状の立上り部８ａと、エア抜き部８ｂと、排水トラップ部８ｃと、逆止弁８ｄとが設けられている。また、外装ケース１内には、洗浄槽２内に乾燥用の空気を送風する乾燥ファン９が設けられている。   FIG. 1: has shown the dishwasher which comprises the water supply valve apparatus of embodiment of this invention. The dishwasher includes an outer case 1 and a cleaning tank 2 in the outer case 1, and water is supplied into the cleaning tank 2 through a water supply path 3. The washing tub 2 is provided with a tableware basket 2 a on which the tableware W is placed, a washing nozzle 4 for injecting washing water toward the tableware basket 2 a, and a heater 5. On the side, a cleaning / drainage pump 7 connected to the bottom of the cleaning tank 2 via a leftover filter 6 is provided. The cleaning water is circulated in the cleaning tank 2 through the cleaning nozzle 4 by rotating the cleaning / drainage pump 7 forward, and the cleaning water in the cleaning tank 2 is drained by reversing the cleaning / drainage pump 7. It drains through 8. The drainage channel 8 is provided with a reverse U-shaped rising portion 8a for preventing backflow, an air venting portion 8b, a drainage trap portion 8c, and a check valve 8d. In the exterior case 1, a drying fan 9 that blows drying air into the cleaning tank 2 is provided.

食器洗浄機の運転スイッチをオンすると、先ず、洗浄槽２に所定量の水が給水され、この水に図外の洗剤供給手段から洗剤が混入されて洗浄水が生成される。そして、給水停止後、ヒータ５に通電すると共に洗浄・排水ポンプ７を正転させて、洗浄水を加熱しつつ洗浄ノズル４から噴射させ、所定時間の洗浄運転を行う。洗浄運転完了後は、洗浄・排水ポンプ７を逆転させて洗浄槽２内の洗浄水を排水し、次に、洗浄槽２に所定量の水を給水した後、洗浄・排水ポンプ７を正転させて洗浄ノズル４から水を噴射させ、所定時間のすすぎ運転を行う。すすぎ運転完了後は、洗浄・排水ポンプ７を逆転させて洗浄槽２内の水を排水し、次に、ヒータ５に通電すると共に乾燥ファン９を駆動させて、所定時間の乾燥運転を行う。   When the operation switch of the dishwasher is turned on, first, a predetermined amount of water is supplied to the washing tub 2, and detergent is mixed into this water from a detergent supply means (not shown) to generate washing water. Then, after the water supply is stopped, the heater 5 is energized and the cleaning / drainage pump 7 is rotated forward so that the cleaning water is sprayed from the cleaning nozzle 4 while being heated, and a cleaning operation for a predetermined time is performed. After completion of the cleaning operation, the cleaning / drainage pump 7 is reversed to drain the cleaning water in the cleaning tank 2, and then a predetermined amount of water is supplied to the cleaning tank 2, and then the cleaning / drainage pump 7 is rotated forward. Then, water is jetted from the cleaning nozzle 4 to perform a rinsing operation for a predetermined time. After the rinsing operation is completed, the cleaning / drainage pump 7 is reversed to drain the water in the cleaning tank 2, and then the heater 5 is energized and the drying fan 9 is driven to perform a drying operation for a predetermined time.

ここで、給水路３には、洗浄運転前及びすすぎ運転前の洗浄槽２への給水を制御する給水弁装置１０が設けられている。以下、図２を参照して、給水弁装置１０について詳述する。尚、図２の上下は鉛直方向の上下に一致している。   Here, the water supply passage 3 is provided with a water supply valve device 10 for controlling water supply to the cleaning tank 2 before the cleaning operation and before the rinsing operation. Hereinafter, the water supply valve device 10 will be described in detail with reference to FIG. Note that the top and bottom in FIG. 2 coincide with the top and bottom in the vertical direction.

給水弁装置１０は、給水路３の上流側部分３ａに連なる流入口１１１と、給水路３の下流側部分３ｂに連なる流出口１１２とを有するバルブハウジング１１を備えている。そして、バルブハウジング１１に、上流側たる流入口１１１側の第１電磁弁１２と下流側たる流出口１１２側の第２電磁弁１３とが配置され、第１と第２の両電磁弁１２，１３がバルブハウジング１１内の連通路１１３を介して直列に接続されている。尚、流入口１１１と流出口１１２は何れも下向きに開口している。   The water supply valve device 10 includes a valve housing 11 having an inlet 111 connected to the upstream portion 3 a of the water supply path 3 and an outlet 112 connected to the downstream portion 3 b of the water supply path 3. The valve housing 11 is provided with a first solenoid valve 12 on the inlet 111 side on the upstream side and a second solenoid valve 13 on the outlet 112 side on the downstream side, and both the first and second solenoid valves 12, 13 are connected in series via a communication passage 113 in the valve housing 11. In addition, both the inflow port 111 and the outflow port 112 are opened downward.

第１電磁弁１２は、バルブハウジング１１に一体成形した弁座１２１と、弁座１２１に開設した、連通路１１３に連なる主弁孔１２２ａを開閉するダイヤフラムから成る主弁１２２と、弁座１２１の周囲に主弁１２２に対向するように形成した、流入口１１１に連なる流入室１２３と、ダイヤフラムの押えを兼ねるカバー１２４によって主弁１２２の背面側に画成され、流入室１２３にオリフィス孔１２３ａを介して連通する背圧室１２５と、背圧室１２５と主弁孔１２２ａとを連通するパイロット弁孔１２６ａを開閉するパイロット弁１２６と、パイロット弁１２６を開閉駆動するソレノイド１２７とから成るパイロット式電磁弁で構成されている。ソレノイド１２７は、電磁コイル１２７ａと、電磁コイル１２７ａに内挿されるカバー１２４に一体の筒状ガイド１２７ｂに収納した可動鉄心１２７ｃと、可動鉄心１２７ｃを軸方向先方に付勢するばね１２７ｄとを備えており、可動鉄心１２７ｃの先端にパイロット弁１２６を取付けている。そして、常時はパイロット弁１２６がパイロット弁孔１２６ａを閉塞する閉弁位置にばね１２７ｄにより付勢保持され、電磁コイル１２７ａに通電したとき、可動鉄心１２７ｃが軸方向尾方に磁気吸引され、パイロット弁１２６がパイロット弁孔１２６ａを開放する開弁位置に変位するようにしている。   The first solenoid valve 12 includes a valve seat 121 formed integrally with the valve housing 11, a main valve 122 formed in the valve seat 121, which is a diaphragm that opens and closes a main valve hole 122 a that communicates with the communication passage 113, and the valve seat 121. An inflow chamber 123 connected to the inflow port 111 formed so as to face the main valve 122 and a cover 124 also serving as a diaphragm presser are defined on the back side of the main valve 122. An orifice hole 123a is formed in the inflow chamber 123. A pilot pressure solenoid 125 comprising: a back pressure chamber 125 communicating with the pilot valve 126; a pilot valve 126 for opening and closing the pilot valve hole 126a communicating with the back pressure chamber 125 and the main valve hole 122a; and a solenoid 127 for opening and closing the pilot valve 126. It consists of a valve. The solenoid 127 includes an electromagnetic coil 127a, a movable iron core 127c housed in a cylindrical guide 127b integrated with a cover 124 inserted in the electromagnetic coil 127a, and a spring 127d that urges the movable iron core 127c forward in the axial direction. The pilot valve 126 is attached to the tip of the movable iron core 127c. And normally, when the pilot valve 126 is energized and held by the spring 127d at the valve closing position where the pilot valve hole 126a is closed, and when the electromagnetic coil 127a is energized, the movable iron core 127c is magnetically attracted in the axial direction. Is displaced to a valve opening position for opening the pilot valve hole 126a.

パイロット弁１２６を閉弁させると、流入室１２３からオリフィス孔１２３ａを介して背圧室１２５に流入する水が背圧室１２５に封じ込められ、主弁１２２の背面に作用する背圧室１２５の水圧による押圧力が主弁１２２の前面に作用する流入室１２３の水圧による押圧力を上回り、主弁１２２が閉弁される。また、パイロット弁１２６を開弁させると、背圧室１２５内の水がパイロット弁孔１２６ａを介して主弁孔１２２ａに流出して背圧室１２５の水圧が低下し、主弁１２２の背面に作用する押圧力が主弁１２２の前面に作用する押圧力を下回って主弁１２２が開弁され、流入室１２３から主弁孔１２２ａを介して連通路１１３に水が流れる。   When the pilot valve 126 is closed, water flowing into the back pressure chamber 125 from the inflow chamber 123 through the orifice hole 123a is contained in the back pressure chamber 125, and the water pressure of the back pressure chamber 125 acting on the back surface of the main valve 122 is sealed. The pressure by the pressure exceeds the pressure by the water pressure of the inflow chamber 123 acting on the front surface of the main valve 122, and the main valve 122 is closed. Further, when the pilot valve 126 is opened, the water in the back pressure chamber 125 flows out to the main valve hole 122a through the pilot valve hole 126a, and the water pressure in the back pressure chamber 125 is reduced. The operating pressure is lower than the pressure acting on the front surface of the main valve 122, the main valve 122 is opened, and water flows from the inflow chamber 123 to the communication passage 113 through the main valve hole 122a.

尚、本実施形態では、オリフィス孔１２３ａとパイロット弁孔１２６ａとを主弁１２２に形成しているが、バルブハウジング１１にオリフィス孔１２３ａとパイロット弁孔１２６ａとを形成することも可能である。   In the present embodiment, the orifice hole 123a and the pilot valve hole 126a are formed in the main valve 122, but the orifice hole 123a and the pilot valve hole 126a may be formed in the valve housing 11.

第２電磁弁１３は、連通路１１３の下流端部の底面に形成した弁座１３１と、弁座１３１に開設した、流出口１１２に連なる弁孔１３２を開閉する弁体１３３と、弁体１３３を開閉駆動するソレノイド１３４とを備える直動式電磁弁で構成されている。ソレノイド１３４は、電磁コイル１３４ａと、電磁コイル１３４ａに内挿されるバルブハウジング１１に一体の筒状ガイド１３４ｂに収納した可動鉄心１３４ｃと、可動鉄心１３４ｃを軸方向先方(下方)に付勢するばね１３４ｄとを備えており、可動鉄心１３４ｃの先端(下端)に弁体１３３を取り付けている。そして、常時は弁体１３３が弁孔１３２を閉塞する閉弁位置にばね１３４ｄにより付勢保持され、電磁コイル１３４ａに通電したとき、可動鉄心１３４ｃが軸方向尾方(上方)に磁気吸引され、弁体１３３が弁孔１３２を開放する開弁位置に変位して、連通路１１３から弁孔１３２を介して流出口１１２に水が流れる。   The second electromagnetic valve 13 includes a valve seat 131 formed on the bottom surface of the downstream end portion of the communication passage 113, a valve body 133 that opens in the valve seat 131 and opens and closes the valve hole 132 connected to the outlet 112, and the valve body 133. It is comprised with the direct-acting solenoid valve provided with the solenoid 134 which opens and closes. The solenoid 134 includes an electromagnetic coil 134a, a movable iron core 134c housed in a cylindrical guide 134b integrated with the valve housing 11 inserted in the electromagnetic coil 134a, and a spring 134d that urges the movable iron core 134c axially forward (downward). The valve body 133 is attached to the tip (lower end) of the movable iron core 134c. The valve body 133 is normally biased and held by the spring 134d at the valve closing position where the valve hole 132 is closed, and when the electromagnetic coil 134a is energized, the movable iron core 134c is magnetically attracted axially (upward), and the valve The body 133 is displaced to the valve opening position where the valve hole 132 is opened, and water flows from the communication path 113 to the outlet 112 through the valve hole 132.

また、バルブハウジング１１には、第２電磁弁１３に並列の第３電磁弁１４が配置されている。即ち、バルブハウジング１１に、連通路１１３と流出口１１２とを結ぶ第２電磁弁１３に並列のバイパス路１１４を形成し、このバイパス路１１４に第３電磁弁１４を介設している。第３電磁弁１４は、バイパス路１１４に設けられた弁座１４１と、弁座１４１に開設した弁孔１４２を開閉する弁体１４３と、弁体１４３を開閉駆動するソレノイド１４４とを備える直動式電磁弁で構成されている。ソレノイド１４４は、電磁コイル１４４ａと、電磁コイル１４４ａに内挿される筒状ガイド１４４ｂに収納した可動鉄心１４４ｃと、可動鉄心１４４ｃを軸方向先方に付勢するばね１４４ｄとを備えており、可動鉄心１４４ｃの先端に弁体１４３を取り付けている。そして、常時は弁体１４３が弁孔１４２を閉塞する閉弁位置にばね１４４ｄにより付勢保持され、電磁コイル１４４ａに通電したとき、可動鉄心１４４ｃが軸方向尾方に磁気吸引され、弁体１４３が弁孔１４２を開放する開弁位置に変位して、連通路１１３からバイパス路１１４を介して流出口１１２に水が流れる。   The valve housing 11 is provided with a third electromagnetic valve 14 in parallel with the second electromagnetic valve 13. That is, a bypass passage 114 is formed in the valve housing 11 in parallel with the second electromagnetic valve 13 connecting the communication passage 113 and the outlet 112, and the third electromagnetic valve 14 is interposed in the bypass passage 114. The third solenoid valve 14 includes a valve seat 141 provided in the bypass passage 114, a valve body 143 that opens and closes a valve hole 142 opened in the valve seat 141, and a solenoid 144 that drives the valve body 143 to open and close. It consists of a type solenoid valve. The solenoid 144 includes an electromagnetic coil 144a, a movable iron core 144c housed in a cylindrical guide 144b inserted in the electromagnetic coil 144a, and a spring 144d that urges the movable iron core 144c in the axial direction, and the movable iron core 144c. A valve body 143 is attached to the tip of the. Then, normally, the valve body 143 is biased and held by the spring 144d at the valve closing position where the valve hole 142 is closed, and when the electromagnetic coil 144a is energized, the movable iron core 144c is magnetically attracted in the axial direction, and the valve body 143 is The valve is moved to the valve opening position where the valve hole 142 is opened, and water flows from the communication path 113 to the outlet 112 through the bypass path 114.

尚、第３電磁弁１４の弁孔１４２は、第２電磁弁１３の弁孔１３２より小径であり、且つ、第２電磁弁１３の弁孔１３２より鉛直方向下方に設けられている。   The valve hole 142 of the third electromagnetic valve 14 has a smaller diameter than the valve hole 132 of the second electromagnetic valve 13 and is provided vertically below the valve hole 132 of the second electromagnetic valve 13.

第１乃至第３電磁弁１２，１３，１４は、食器洗浄機に設けられたコントローラ１５により開閉制御される。その詳細は、図３に示す通りであり、先ず、Ｓ１のステップで給水開始指令が出されたか否かを判別する。そして、給水開始指令が出されたときは、Ｓ２のステップで第３電磁弁１４の電磁コイル１４４ａに通電して第３電磁弁１４を開弁させた後、Ｓ３のステップで第２電磁弁１３の電磁コイル１３４ａに通電して第２電磁弁１３を開弁させ、次に、Ｓ４のステップで第１電磁弁１２の電磁コイル１２７ａに通電して第１電磁弁１２を開弁させると共に、第３電磁弁１４の電磁コイル１４４ａへの通電を停止して第３電磁弁１４を閉弁させる。これによれば、流入口１１１から流出口１１２に第１電磁弁１２の主弁孔１２２ａと連通路１１３と第２電磁弁１３の弁孔１３２とを介して水が流れ、洗浄槽２への給水が開始される。   The first to third electromagnetic valves 12, 13, and 14 are controlled to be opened and closed by a controller 15 provided in the dishwasher. The details are as shown in FIG. 3. First, it is determined whether or not a water supply start command is issued in step S1. When a water supply start command is issued, the electromagnetic valve 144a of the third electromagnetic valve 14 is energized in step S2 to open the third electromagnetic valve 14, and then the second electromagnetic valve 13 is opened in step S3. The electromagnetic coil 134a is energized to open the second electromagnetic valve 13, and then the electromagnetic coil 127a of the first electromagnetic valve 12 is energized to open the first electromagnetic valve 12 in step S4. The energization of the electromagnetic coil 144a of the third electromagnetic valve 14 is stopped and the third electromagnetic valve 14 is closed. According to this, water flows from the inlet 111 to the outlet 112 via the main valve hole 122 a of the first electromagnetic valve 12, the communication path 113, and the valve hole 132 of the second electromagnetic valve 13, and flows into the cleaning tank 2. Water supply is started.

ところで、第２電磁弁１３の弁孔１３２は所要の流量で給水できるように大きく形成する必要があり、弁体１３３及び可動鉄心１３４ｃも大径になる。そして、可動鉄心１３４ｃの軸方向尾端面には筒状ガイド１３４ｂ内を介して連通路１１３の水圧が作用する。そのため、連通路１１３の水圧が高い状態で第２電磁弁１３を開弁させるには、電磁コイル１３４ａの励磁力をかなり大きくすることが必要になり、ソレノイド１３４が大型化して消費電力が増大する。   By the way, the valve hole 132 of the second electromagnetic valve 13 needs to be formed large so that water can be supplied at a required flow rate, and the valve body 133 and the movable iron core 134c also have a large diameter. And the water pressure of the communication path 113 acts on the axial direction tail end surface of the movable iron core 134c via the inside of the cylindrical guide 134b. Therefore, in order to open the second electromagnetic valve 13 in a state where the water pressure in the communication passage 113 is high, it is necessary to considerably increase the exciting force of the electromagnetic coil 134a, and the solenoid 134 is increased in size and power consumption is increased. .

ここで、第１電磁弁１２が閉弁している状態で第２電磁弁１３を開弁させれば、連通路１１３の水圧が低い状態で第２電磁弁１３を開弁できると思われるが、実際には、給水停止中に家屋の水道配管で発生するウォータハンマーによる第１電磁弁１２の流入室１２３の水圧変化で第１電磁弁１２の主弁１２２が一時的に開弁して、連通路１１３の水圧が高くなってしまうことがある。そのため、このままでは、第２電磁弁１３の電磁コイル１３４ａの励磁力をかなり大きくしないと、第２電磁弁１３の開弁不良を生ずる。   Here, if the second solenoid valve 13 is opened while the first solenoid valve 12 is closed, the second solenoid valve 13 may be opened while the water pressure in the communication passage 113 is low. Actually, the main valve 122 of the first solenoid valve 12 is temporarily opened due to a change in the water pressure in the inflow chamber 123 of the first solenoid valve 12 due to a water hammer generated in the water pipe of the house while the water supply is stopped. The water pressure in the communication path 113 may increase. For this reason, if the exciting force of the electromagnetic coil 134a of the second electromagnetic valve 13 is not significantly increased, the opening failure of the second electromagnetic valve 13 occurs.

これに対し、本実施形態では、上記の如く第２電磁弁１３に先行して第３電磁弁１４を開弁させるため、連通路１１３が第３電磁弁１４を介して圧抜きされ、第２電磁弁１３は水圧を受けずに開弁される。従って、第２電磁弁１３の電磁コイル１３４ａの励磁力が小さくても、第２電磁弁１３の開弁不良は生じない。その結果、第２電磁弁１３のソレノイド１３４を小型化して消費電力を大幅に低減できる。   On the other hand, in this embodiment, in order to open the 3rd solenoid valve 14 ahead of the 2nd solenoid valve 13 as mentioned above, the communicating path 113 is depressurized via the 3rd solenoid valve 14, and the 2nd solenoid valve 14 is opened. The solenoid valve 13 is opened without receiving water pressure. Therefore, even if the exciting force of the electromagnetic coil 134a of the second electromagnetic valve 13 is small, the opening failure of the second electromagnetic valve 13 does not occur. As a result, the solenoid 134 of the second electromagnetic valve 13 can be downsized to greatly reduce power consumption.

尚、第３電磁弁１４は連通路１１３の水圧を受けた状態で開弁されるが、第３電磁弁１４の弁孔１４２は圧抜き可能な範囲で可及的に小さくでき、そのため、弁体１３３及び可動鉄心１３４ｃも小径になり、電磁コイル１４４ａの励磁力が小さくても第３電磁弁１４の開弁不良は生じない。従って、第３電磁弁１４の付加による消費電力の増加は僅かになり、第２電磁弁１３の消費電力の大幅な低減により、給水開始時の第１乃至第３電磁弁１２，１３，１４のトータルの消費電力を低減できる。また、第２電磁弁１３の開弁後に第３電磁弁１４を閉弁させるため、給水中は第３電磁弁１４の電磁コイル１４４ａに通電せずに済み、第１乃至第３電磁弁１２，１３，１４のトータルの消費電力が一層低減される。   Although the third electromagnetic valve 14 is opened in a state where it receives the water pressure of the communication passage 113, the valve hole 142 of the third electromagnetic valve 14 can be made as small as possible within the range where pressure can be released. The body 133 and the movable iron core 134c also have a small diameter, and even if the exciting force of the electromagnetic coil 144a is small, the opening failure of the third electromagnetic valve 14 does not occur. Therefore, the increase in power consumption due to the addition of the third solenoid valve 14 is slight, and the power consumption of the second solenoid valve 13 is greatly reduced, so that the first to third solenoid valves 12, 13, 14 at the start of water supply are reduced. Total power consumption can be reduced. Further, since the third electromagnetic valve 14 is closed after the second electromagnetic valve 13 is opened, it is not necessary to energize the electromagnetic coil 144a of the third electromagnetic valve 14 during water supply, and the first to third electromagnetic valves 12, The total power consumption of 13 and 14 is further reduced.

上記の如くして給水を開始すると、次に、Ｓ５のステップで給水停止指令が出されたか否かを判別する。尚、給水停止指令は、洗浄槽２内の水位が所定レベルになってこれを図外の水位スイッチが検出したときに出される。そして、給水停止指令が出されると、Ｓ６のステップで第１電磁弁１２の電磁コイル１２７ａへの通電を停止して第１電磁弁１２を閉弁させた後、Ｓ７のステップで第２電磁弁１３の電磁コイル１３４ａへの通電を停止して第２電磁弁１３を閉弁させると共に、第３電磁弁１４の電磁コイル１４４ａに通電して第３電磁弁１４を開弁させる。次に、Ｓ８のステップで第２電磁弁１３の閉弁から所定時間(例えば、数秒)経過したか否かを判別し、所定時間経過したときにＳ９のステップで第３電磁弁１４の電磁コイル１４４ａへの通電を停止して第３電磁弁１４を閉弁させる。   When water supply is started as described above, it is next determined in step S5 whether or not a water supply stop command has been issued. The water supply stop command is issued when the water level in the cleaning tank 2 reaches a predetermined level and is detected by a water level switch (not shown). When a water supply stop command is issued, the energization to the electromagnetic coil 127a of the first electromagnetic valve 12 is stopped in step S6 and the first electromagnetic valve 12 is closed, and then the second electromagnetic valve in step S7. Then, energization of the 13 electromagnetic coil 134 a is stopped to close the second electromagnetic valve 13, and the electromagnetic coil 144 a of the third electromagnetic valve 14 is energized to open the third electromagnetic valve 14. Next, it is determined whether or not a predetermined time (for example, several seconds) has elapsed since the closing of the second electromagnetic valve 13 in step S8. When the predetermined time has elapsed, the electromagnetic coil of the third electromagnetic valve 14 is determined in step S9. The energization to 144a is stopped and the third solenoid valve 14 is closed.

ここで、第１電磁弁１２の電磁コイル１２７ａへの通電を停止すると、パイロット弁１２６が閉弁し、背圧室１２５の水圧が上昇して、主弁１２２の背面と前面とに作用する押圧力の差で主弁１２２が閉弁するが、給水圧が低いと、主弁１２２の背面と前面とに作用する押圧力の差が小さくなり、異物の噛み込み等により止水不良を生ずることがある。また、オリフィス孔１２３ａの目詰まりで背圧室１２５の水圧上昇が妨げられて、止水不良を生ずることもある。然し、本実施形態では、第２電磁弁１２での止水不良を生じても、第２電磁弁１３の閉弁により給水を停止でき、洗浄槽２から水が溢れ出るといった漏水事故の発生を可及的に防止できる。   Here, when energization of the electromagnetic coil 127a of the first electromagnetic valve 12 is stopped, the pilot valve 126 is closed, the water pressure in the back pressure chamber 125 rises, and the pressure acting on the back surface and the front surface of the main valve 122 is increased. The main valve 122 closes due to the pressure difference, but if the feed water pressure is low, the difference in the pressing force acting on the back surface and the front surface of the main valve 122 becomes small, resulting in poor water stoppage due to foreign matter biting. There is. In addition, clogging of the orifice hole 123a may hinder an increase in water pressure in the back pressure chamber 125, resulting in poor water stoppage. However, in this embodiment, even if water stoppage failure occurs in the second solenoid valve 12, water supply can be stopped by closing the second solenoid valve 13, and the occurrence of a water leakage accident such that water overflows from the washing tank 2 is prevented. It can be prevented as much as possible.

ところで、第１と第２の両電磁弁１２,１３の閉弁後に連通路１１３に水が残留すると、残留水の凍結によりバルブブロック１１が破損する可能性がある。特に、新築家屋に食器洗浄機を設置し、試運転で洗浄槽２に給水した後、給水路３の上流側部分３ａからの排水を行っても、このままでは連通路１１３に水が残留するため、寒冷期においては新築家屋に人が入居するまでの間にバルブハウジング１１が破損してしまう可能性が高くなる。   By the way, if water remains in the communication passage 113 after the first and second electromagnetic valves 12 and 13 are closed, the valve block 11 may be damaged due to freezing of the residual water. In particular, after installing a dishwasher in a newly built house and supplying water to the washing tub 2 in a trial operation, water remains in the communication passage 113 as it is even if drainage from the upstream portion 3a of the water supply channel 3 is performed. In the cold season, there is a high possibility that the valve housing 11 will be damaged before a person moves into the new house.

そこで、本実施形態では、上記の如く第３電磁弁１４の弁孔１４２を第２電磁弁１３の弁孔１３２より鉛直方向下方に設けると共に、給水停止時に第１と第２の両電磁弁１２，１３の閉弁後所定時間経過するまで第３電磁弁１４を開弁させている。これによれば、第１と第２の両電磁弁１２，１３の閉弁後に連通路１１３に残留する水が、第３電磁弁１４を閉弁させるまでの間に、第３電磁弁１４の弁孔１４２を介して流出口１１２に排水される。従って、入居前に連通路１１３に残留する水の凍結でバルブハウジング１１の破損を生ずることを防止できる。   Therefore, in the present embodiment, as described above, the valve hole 142 of the third electromagnetic valve 14 is provided vertically below the valve hole 132 of the second electromagnetic valve 13 and both the first and second electromagnetic valves 12 are stopped when water supply is stopped. The third electromagnetic valve 14 is opened until a predetermined time elapses after the valve is closed. According to this, the water remaining in the communication passage 113 after the first and second electromagnetic valves 12 and 13 are closed until the third electromagnetic valve 14 is closed until the third electromagnetic valve 14 is closed. Water is drained to the outlet 112 through the valve hole 142. Therefore, it is possible to prevent the valve housing 11 from being damaged due to freezing of water remaining in the communication passage 113 before moving in.

尚、本実施形態では、給水停止時に第１電磁弁１２と第２電磁弁１３とを時間差を存して閉弁させているが、第１と第２の両電磁弁１２，１３を同時に閉弁させるようにしても良い。   In this embodiment, when the water supply is stopped, the first solenoid valve 12 and the second solenoid valve 13 are closed with a time difference, but both the first and second solenoid valves 12 and 13 are closed simultaneously. You may make it valve.

また、本実施形態では、第３電磁弁１４の可動鉄心１４４ｃの先端に水圧を受ける受圧面を比較的広く確保している。これによれば、ウォータハンマーにより第１電磁弁１２の主弁１２２が一時的に開弁すると、連通路１１３を介して伝播されるウォータハンマーを受けて第３電磁弁１４が一時的に開弁し、ウォータハンマーによる水道配管の過度の水圧上昇を防止する過圧逃がし機能が得られる。   Further, in the present embodiment, a relatively large pressure receiving surface for receiving water pressure is secured at the tip of the movable iron core 144c of the third electromagnetic valve 14. According to this, when the main valve 122 of the first electromagnetic valve 12 is temporarily opened by the water hammer, the third electromagnetic valve 14 is temporarily opened in response to the water hammer transmitted through the communication path 113. In addition, an overpressure relief function that prevents an excessive increase in water pressure in the water pipe due to the water hammer can be obtained.

以上、食器洗浄機の給水路に設ける給水弁装置１０に本発明を適用した実施形態について説明したが、食器洗浄機に限らず水を使用する機器の給水路に設ける給水弁装置として本発明は広く適用できる。   As mentioned above, although embodiment which applied this invention to the water supply valve apparatus 10 provided in the water supply path of a dishwasher was described, this invention is not only a dishwasher but a water supply valve apparatus provided in the water supply path of the apparatus which uses water. Widely applicable.

本発明の実施形態の給水弁装置を具備する食器洗浄機の構造を示す説明図。Explanatory drawing which shows the structure of the dishwasher which comprises the water supply valve apparatus of embodiment of this invention. 実施形態の給水弁装置の断面図。Sectional drawing of the water supply valve apparatus of embodiment. 実施形態の給水弁装置の制御内容を示すフロー図。The flowchart which shows the control content of the water supply valve apparatus of embodiment.

符号の説明Explanation of symbols

３…給水路、１０…給水弁装置、１１…バルブハウジング、１２…第１電磁弁、１２１…弁座、１２２…主弁、１２２ａ…主弁孔、１２３…流入室、１２３ａ…オリフィス孔、１２５…背圧室、１２６…パイロット弁、１２６ａ…パイロット弁孔、１２７…ソレノイド、１３…第２電磁弁、１３２…弁孔、１３３…弁体、１３４…ソレノイド、１４…第３電磁弁、１４２…弁孔、１４３…弁体、１４４…ソレノイド。   DESCRIPTION OF SYMBOLS 3 ... Water supply path, 10 ... Water supply valve apparatus, 11 ... Valve housing, 12 ... 1st solenoid valve, 121 ... Valve seat, 122 ... Main valve, 122a ... Main valve hole, 123 ... Inflow chamber, 123a ... Orifice hole, 125 ... back pressure chamber, 126 ... pilot valve, 126a ... pilot valve hole, 127 ... solenoid, 13 ... second solenoid valve, 132 ... valve hole, 133 ... valve body, 134 ... solenoid, 14 ... third solenoid valve, 142 ... Valve hole, 143 ... valve body, 144 ... solenoid.

Claims (3)

水を使用する機器の給水路に設けられる給水弁装置であって、直列に接続された上流側の第１電磁弁と下流側の第２電磁弁とを備え、第１電磁弁は、弁座に開設した主弁孔を開閉するダイヤフラムから成る主弁と、主弁の背面側に画成され、弁座の周囲に形成した流入室にオリフィス孔を介して連通する背圧室と、背圧室と主弁孔とを連通するパイロット弁孔を開閉するパイロット弁と、パイロット弁を開閉駆動するソレノイドとを備えるパイロット式電磁弁で構成され、第２電磁弁は、第１電磁弁の下流側に位置する弁孔を開閉する弁体と、弁体を開閉駆動するソレノイドとを備える直動式電磁弁で構成されるものにおいて、
第２電磁弁に並列の第３電磁弁を備え、第３電磁弁は、第２電磁弁の弁孔より小径の弁孔を開閉する弁体と、弁体を開閉駆動するソレノイドとを備える直動式電磁弁で構成され、
給水開始時に、第１乃至第３電磁弁を第３電磁弁、第２電磁弁、第１電磁弁の順で時間差を存して開弁させることを特徴とする給水弁装置。 A water supply valve device provided in a water supply path of a device that uses water, comprising an upstream first electromagnetic valve and a downstream second electromagnetic valve connected in series, wherein the first electromagnetic valve is a valve seat. A main valve comprising a diaphragm that opens and closes the main valve hole, a back pressure chamber that is defined on the back side of the main valve and communicates with an inflow chamber formed around the valve seat via an orifice hole, and a back pressure The pilot solenoid valve includes a pilot valve that opens and closes a pilot valve hole that communicates between the chamber and the main valve hole, and a solenoid that drives the pilot valve to open and close. The second solenoid valve is downstream of the first solenoid valve. Comprising a direct-acting solenoid valve comprising a valve body that opens and closes a valve hole located at a position and a solenoid that drives the valve body to open and close,
A third solenoid valve is provided in parallel with the second solenoid valve. The third solenoid valve includes a valve body that opens and closes a valve hole having a diameter smaller than that of the second solenoid valve, and a solenoid that opens and closes the valve body. It consists of a dynamic solenoid valve,
A water supply valve device, wherein at the start of water supply, the first to third electromagnetic valves are opened with a time difference in the order of the third electromagnetic valve, the second electromagnetic valve, and the first electromagnetic valve. 前記第２電磁弁の開弁後に前記第３電磁弁を閉弁させることを特徴とする請求項１記載の給水弁装置。   The water supply valve device according to claim 1, wherein the third solenoid valve is closed after the second solenoid valve is opened. 前記第１乃至第３電磁弁は共通のバルブハウジングに配置され、第３電磁弁の弁孔は第２電磁弁の弁孔より鉛直方向下方に設けられ、給水停止時に、第１電磁弁と第２電磁弁との閉弁後所定時間経過するまで第３電磁弁を開弁させることを特徴とする請求項１又は２記載の給水弁装置。   The first to third solenoid valves are disposed in a common valve housing, and the valve hole of the third solenoid valve is provided vertically below the valve hole of the second solenoid valve, and when the water supply is stopped, 3. The water supply valve device according to claim 1, wherein the third solenoid valve is opened until a predetermined time elapses after the two solenoid valves are closed.
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JP4724104B2 (en) * 2006-12-11 2011-07-13 リンナイ株式会社 Water supply valve device
JP4724142B2 (en) * 2007-03-23 2011-07-13 リンナイ株式会社 Water supply valve device
JP5010331B2 (en) * 2007-04-18 2012-08-29 株式会社東芝 Washing machine
JP6006565B2 (en) * 2012-07-19 2016-10-12 日立アプライアンス株式会社 Solenoid valve unit and water heater
JP6894394B2 (en) * 2018-03-26 2021-06-30 リンナイ株式会社 Cleaning liquid generator and bathtub cleaning device

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JP2000139808A (en) * 1998-11-04 2000-05-23 Osaka Gas Co Ltd Dishwasher
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JPS57124667U (en) * 1981-01-28 1982-08-03
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JP2007321937A (en) * 2006-06-05 2007-12-13 Rinnai Corp Water supply valve device

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