JP4724142B2 - Water supply valve device - Google Patents

Water supply valve device Download PDF

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JP4724142B2
JP4724142B2 JP2007076489A JP2007076489A JP4724142B2 JP 4724142 B2 JP4724142 B2 JP 4724142B2 JP 2007076489 A JP2007076489 A JP 2007076489A JP 2007076489 A JP2007076489 A JP 2007076489A JP 4724142 B2 JP4724142 B2 JP 4724142B2
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valve
solenoid
water supply
solenoid valve
water
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JP2008232384A (en
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誠治 森口
一幸 雨宮
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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。   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 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 electromagnetic valve and the second electromagnetic 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, the solenoid of the second solenoid valve cannot be reduced in size to reduce power consumption.

そこで、本願出願人は、先に特願2006−176431で、パイロット式電磁弁から成る上流側の第1電磁弁と直動式電磁弁から成る下流側の第2電磁弁とを備えると共に、第2電磁弁に並列に、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る第3電磁弁を設けた給水弁装置を提案している。   In view of this, the applicant of the present application previously described in Japanese Patent Application No. 2006-176431 includes an upstream first solenoid valve composed of a pilot solenoid valve and a downstream second solenoid valve composed of a direct acting solenoid valve. In parallel with the two solenoid valves, a third solenoid valve configured by a direct acting solenoid valve having 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 drives the valve body to open and close is provided. Proposed water supply valve device.

この先願の給水弁装置によれば、給水開始時に、第1電磁弁のソレノイドへの通電に先行して第2電磁弁と第3電磁弁のソレノイドに通電することにより第2電磁弁を確実に開弁させることができる。即ち、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、第1電磁弁の開弁前に第3電磁弁をそのソレノイドへの通電で開弁させれば、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 water supply valve device of this prior application, at the start of water supply, the second solenoid valve is securely connected by energizing the solenoids of the second and third solenoid valves prior to energization of the solenoid of the first solenoid valve. The valve can be opened. That is, even if the water pressure in the communication path between the first and second solenoid valves rises while the water supply is stopped, the third solenoid valve is opened by energizing the solenoid before the first solenoid valve is opened. Then, the communication path is depressurized via the third electromagnetic valve, and the second electromagnetic 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.

然し、先願の給水弁装置においても、以下の不具合を生ずることが判明した。即ち、第1乃至第3の全ての電磁弁が閉弁される給水停止状態でも上記の如くウォータハンマーにより第1電磁弁と第2電磁弁との間の連通路の水圧が上昇して、第2電磁弁の弁体が弁座に圧接されるため、給水停止状態が長時間継続すると、第2電磁弁の弁体が弁座に貼り付いてしまう可能性がある。その結果、給水開始時に第1電磁弁のソレノイドへの通電に先行して第2電磁弁と第3電磁弁のソレノイドに通電しても、第2電磁弁が開弁せず、給水不能になることがある。
特開2000−139808号公報
However, it has been found that the prior art water supply valve device also has the following problems. That is, even when all the first to third solenoid valves are closed, the water pressure in the communication path between the first solenoid valve and the second solenoid valve is increased by the water hammer as described above, Since the valve body of the 2 solenoid valve is pressed against the valve seat, the valve body of the second solenoid valve may stick to the valve seat if the water supply stop state continues for a long time. As a result, even when the solenoids of the second solenoid valve and the third solenoid valve are energized prior to energization of the solenoid of the first solenoid valve at the start of water supply, the second solenoid valve does not open and water supply becomes impossible. Sometimes.
JP 2000-139808 A

本発明は、以上の点に鑑み、給水停止状態が長時間継続することで第2電磁弁の弁体が弁座に貼り付くことを確実に防止できるように上記先願のものを改良した給水弁装置を提供することをその課題としている。   In view of the above, the present invention is an improved water supply of the above-mentioned prior application so that the valve body of the second solenoid valve can be reliably prevented from sticking to the valve seat when the water supply stop state continues for a long time. The problem is to provide a valve device.

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電磁弁と第2電磁弁に並列の第3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、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第2電磁弁の弁体より小径の弁体と、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1乃至第3の全ての電磁弁が閉弁される給水停止状態の継続時間を計測する計時手段を備え、第1乃至第3電磁弁を開閉制御する制御手段は、計時手段により計測される給水停止状態の継続時間が所定時間に達したときに、第3電磁弁のみを一時的に開弁させる制御を実行するように構成されてい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 channel 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. And a third solenoid valve in parallel with the second solenoid valve, the first solenoid valve is defined on the back side of the main valve, a main valve comprising a diaphragm that opens and closes the main valve hole opened in the valve seat, A back pressure chamber communicating with an inflow chamber formed around the valve seat via an orifice hole, a pilot valve for opening and closing a pilot valve hole communicating with the back pressure chamber and the main valve hole, and a solenoid for driving the pilot valve to open and close The second solenoid valve includes a valve body that opens and closes a valve hole located on the downstream side of the first solenoid valve, and a direct acting solenoid that includes a solenoid that opens and closes the valve body. Consists of valves, the third solenoid valve opens and closes a valve hole with a smaller diameter than the valve hole of the second solenoid valve A small diameter of the valve body from the valve element of the second solenoid valve, in what is consists of direct acting solenoid valve and a solenoid for opening and closing the valve body, first to third all the electromagnetic valves are closed that Provided with time measuring means for measuring the duration of the water supply stop state, and the control means for controlling the opening and closing of the first to third electromagnetic valves when the duration of the water supply stop state measured by the time measuring means has reached a predetermined time In addition, it is configured to execute control for temporarily opening only the third electromagnetic valve.

本発明によれば、第1乃至第3の全ての電磁弁が閉弁される給水停止状態において第1と第2の両電磁弁間の連通路の水圧が上昇しても、給水停止状態が所定時間継続したところで第3電磁弁が一時的に開弁されて、連通路が圧抜きされる。そして、この圧抜きにより、第2電磁弁の弁体の弁座に対する圧接が解除される。従って、第2電磁弁の弁体が弁座に長時間圧接して貼り付くことを確実に防止できる。その結果、給水開始時に第1電磁弁のソレノイドへの通電に先行して第2電磁弁と第3電磁弁のソレノイドに通電することにより、第2電磁弁が確実に開弁し、その後の第1電磁弁の開弁で確実に給水が行われる。   According to the present invention, even if the water pressure in the communication path between the first and second solenoid valves increases in the water supply stop state in which all the first to third solenoid valves are closed, the water supply stop state is maintained. When continuing for a predetermined time, the third electromagnetic valve is temporarily opened, and the communication passage is depressurized. And the pressure contact with respect to the valve seat of the valve body of a 2nd solenoid valve is cancelled | released by this pressure relief. Accordingly, it is possible to reliably prevent the valve body of the second electromagnetic valve from sticking to the valve seat after being pressed against the valve seat for a long time. As a result, by energizing the solenoids of the second solenoid valve and the third solenoid valve prior to energization of the solenoid of the first solenoid valve at the start of water supply, the second solenoid valve is surely opened, and then the second solenoid valve is opened. 1 Water supply is reliably performed by opening the solenoid valve.

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 washing 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とから成る常閉型の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 normally closed type comprising a back pressure chamber 125 communicating with each other, a pilot valve 126 for opening and closing a pilot valve hole 126a communicating with the back pressure chamber 125 and the main valve hole 122a, and a solenoid 127 for driving the pilot valve 126 to open and close. The pilot type solenoid 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 closed 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とを備える常閉型の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. And a normally-closed direct acting solenoid valve that includes a solenoid 134 that 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とを備える常閉型の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 electromagnetic 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 provided in the valve seat 141, and a solenoid 144 that drives the valve body 143 to open and close. It consists of a type of direct acting 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 axially forward, 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制御手段たるコントローラ15により開閉制御される。コントローラ15には、洗浄槽2の底部に連通する連通槽16aに設けたフロートスイッチで構成される水位スイッチ16からの信号が入力される。水位スイッチ16は、食器洗浄機への給水量が所定水量に達して、洗浄槽2内の水位が所定の規定水位に上昇したときにオンする。   The first to third electromagnetic valves 12, 13, and 14 are controlled to be opened and closed by a controller 15 that is a control means provided in the dishwasher. The controller 15 receives a signal from a water level switch 16 configured by a float switch provided in a communication tank 16 a communicating with the bottom of the cleaning tank 2. The water level switch 16 is turned on when the amount of water supplied to the dishwasher reaches a predetermined water amount and the water level in the cleaning tank 2 rises to a predetermined specified water level.

コントローラ15による制御の詳細は、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に、S2のステップでコントローラ15に内蔵する計時手段たるタイマをリセットすると共に、S3のステップで給水開始制御を実行する。   The details of the control by the controller 15 are as shown in FIG. 3. First, it is determined whether or not a water supply start command is issued in step S1. Then, when a water supply start command is issued, the timer which is a time measuring means built in the controller 15 is reset in step S2, and water supply start control is executed in step S3.

給水開始制御の詳細は図4に示す通りであり、先ず、S31のステップで第3電磁弁14のソレノイド144(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、S32のステップで第3電磁弁14のソレノイド144への通電開始から所定の待ち時間(例えば、0.5秒)が経過したか否かを判別し、待ち時間が経過したときに、S33のステップで第2電磁弁13のソレノイド134(電磁コイル134a)に通電して第2電磁弁13を開弁させる。次に、S34のステップで第2電磁弁13のソレノイド134への通電開始から所定の待ち時間(例えば、0.5秒)が経過したか否かを判別し、待ち時間が経過したときに、S35のステップで第1電磁弁12のソレノイド127(電磁コイル127a)に通電して第1電磁弁12を開弁させる。次に、S36のステップで第1電磁弁12のソレノイド127への通電開始から所定の待ち時間(例えば、0.5秒)が経過したか否かを判別し、待ち時間が経過したときに、S37のステップで第3電磁弁14のソレノイド144への通電を停止して第3電磁弁14を閉弁させる。   The details of the water supply start control are as shown in FIG. 4. First, in step S31, the solenoid 144 (electromagnetic coil 144a) of the third electromagnetic valve 14 is energized to open the third electromagnetic valve 14. Next, in step S32, it is determined whether or not a predetermined waiting time (for example, 0.5 seconds) has elapsed since the start of energization of the solenoid 144 of the third solenoid valve 14, and when the waiting time has elapsed, In step S33, the solenoid 134 (electromagnetic coil 134a) of the second electromagnetic valve 13 is energized to open the second electromagnetic valve 13. Next, in step S34, it is determined whether or not a predetermined waiting time (for example, 0.5 seconds) has elapsed since the start of energization of the solenoid 134 of the second electromagnetic valve 13, and when the waiting time has elapsed, In step S35, the solenoid 127 (electromagnetic coil 127a) of the first solenoid valve 12 is energized to open the first solenoid valve 12. Next, it is determined whether or not a predetermined waiting time (for example, 0.5 seconds) has elapsed from the start of energization of the solenoid 127 of the first solenoid valve 12 in step S36, and when the waiting time has elapsed, In step S37, energization to the solenoid 144 of the third electromagnetic valve 14 is stopped and the third electromagnetic valve 14 is closed.

以上の給水開始制御を実行すると、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。   When the above water supply start control is executed, water flows from the inlet 111 to the outlet 112 through the main valve hole 122a of the first solenoid valve 12, the communication passage 113, and the valve hole 132 of the second solenoid valve 13, and is washed. Water supply to the tank 2 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、ソレノイド134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 with the water pressure in the communication passage 113 being high, it is necessary to considerably increase the exciting force of the solenoid 134, 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のソレノイド134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 solenoid 134 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、上記給水開始制御では、第1電磁弁12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、その後の第2電磁弁13のソレノイド134への通電により第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のソレノイド134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 the water supply start control, in order to open the third solenoid valve 14 prior to the first solenoid valve 12, the communication passage 113 is depressurized via the third solenoid valve 14, and then the second solenoid valve 14 is opened. By energizing the solenoid 134 of the solenoid valve 13, the second solenoid valve 13 is opened without receiving water pressure. Therefore, even if the exciting force of the solenoid 134 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、本実施形態の給水開始制御では、第3電磁弁14のソレノイド144への通電開始後に第2電磁弁13のソレノイド134への通電を開始しているが、第3電磁弁14のソレノイド144への通電開始と同時に第2電磁弁13のソレノイド134への通電を開始しても良い。この場合、第3電磁弁14を介しての圧抜きで連通路113の水圧が低下した時点において第2電磁弁13が開弁する。   In the water supply start control of the present embodiment, the energization of the solenoid 134 of the second solenoid valve 13 is started after the energization of the solenoid 144 of the third solenoid valve 14 is started, but the solenoid 144 of the third solenoid valve 14 is started. The energization to the solenoid 134 of the second electromagnetic valve 13 may be started simultaneously with the start of energization to. In this case, the second solenoid valve 13 is opened when the water pressure in the communication passage 113 is reduced by the pressure relief through the third solenoid valve 14.

ここで、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143及び可動鉄心144cも小径になり、ソレノイド144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1電磁弁12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のソレノイド144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。尚、第3電磁弁14は第1電磁弁12の開弁と同時に閉弁させても良い。   Here, the third electromagnetic valve 14 is opened in a state where it receives the water pressure of the communication passage 113, but the valve hole 142 of the third electromagnetic valve 14 can be made as small as possible within a depressurizable range. The valve body 143 and the movable iron core 144c also have a small diameter, and even if the excitation force of the solenoid 144 is small, the valve 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 solenoid valve 14 is closed after the first solenoid valve 12 is opened, it is not necessary to energize the solenoid 144 of the third solenoid valve 14 during water supply, and the first to third solenoid valves 12 and 13 are not supplied. , 14 is further reduced. The third electromagnetic valve 14 may be closed simultaneously with the opening of the first electromagnetic valve 12.

給水開始制御の完了後は、図3に示す如く、S4のステップで水位スイッチ16がオンしたか否かを判別する。そして、水位スイッチ16がオンしたときに、S5のステップで給水停止制御を実行する。   After completion of the water supply start control, as shown in FIG. 3, it is determined whether or not the water level switch 16 is turned on in step S4. Then, when the water level switch 16 is turned on, the water supply stop control is executed in step S5.

給水停止制御の詳細は図5に示す通りであり、先ず、S51のステップで第1電磁弁12のソレノイド127への通電を停止して第1電磁弁12を閉弁させる。次に、S52のステップで第1電磁弁12のソレノイド127への通電停止から所定の待ち時間(例えば、1秒)が経過したか否かを判別し、待ち時間が経過したときに、S53のステップで第3電磁弁14のソレノイド144に通電して第3電磁弁14を開弁させる。次に、S54のステップで第3電磁弁14のソレノイド144への通電開始から所定の待ち時間(例えば、1秒)が経過したか否かを判別し、待ち時間が経過したときに、S55のステップで第2電磁弁13のソレノイド134への通電を停止して第2電磁弁13を閉弁させる。次に、S56のステップで第2電磁弁13のソレノイド134への通電停止から所定の待ち時間時間(例えば、0.5秒)経過したか否かを判別し、待ち時間が経過したときに、S57のステップで第3電磁弁14のソレノイド144への通電を停止して第3電磁弁14を閉弁させる。   The details of the water supply stop control are as shown in FIG. 5. First, in step S51, the energization to the solenoid 127 of the first electromagnetic valve 12 is stopped and the first electromagnetic valve 12 is closed. Next, in step S52, it is determined whether or not a predetermined waiting time (for example, 1 second) has elapsed since the energization stop of the solenoid 127 of the first solenoid valve 12. When the waiting time has elapsed, In step, the solenoid 144 of the third solenoid valve 14 is energized to open the third solenoid valve 14. Next, in step S54, it is determined whether or not a predetermined waiting time (for example, 1 second) has elapsed since the start of energization of the solenoid 144 of the third solenoid valve 14. When the waiting time has elapsed, In step, the energization to the solenoid 134 of the second electromagnetic valve 13 is stopped and the second electromagnetic valve 13 is closed. Next, in step S56, it is determined whether or not a predetermined waiting time (for example, 0.5 seconds) has elapsed since the energization stop of the solenoid 134 of the second solenoid valve 13, and when the waiting time has elapsed, In step S57, energization of the solenoid 144 of the third electromagnetic valve 14 is stopped and the third electromagnetic valve 14 is closed.

ここで、第1電磁弁12のソレノイド127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1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 to the solenoid 127 of the first solenoid valve 12 is stopped, the pilot valve 126 is closed, the water pressure in the back pressure chamber 125 is increased, and the pressing force acting on the back surface and the front surface of the main valve 122 is increased. The main valve 122 closes due to the difference between the two, 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, which may cause poor water stoppage due to the biting of foreign matter. is there. 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 first solenoid valve 12, the 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.

また、第1電磁弁12の閉弁後に、第2電磁弁13を閉弁させると共に第3電磁弁14を一定期間開弁させているため、連通路113内の水を排水できる。従って、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。   In addition, since the second electromagnetic valve 13 is closed and the third electromagnetic valve 14 is opened for a certain period after the first electromagnetic valve 12 is closed, the water in the communication passage 113 can be drained. Therefore, it is possible to prevent the valve housing 11 from being damaged due to freezing of water remaining in the communication passage 113.

ところで、第1乃至第3の全ての電磁弁12,13,14が閉弁される給水停止状態でも、上記の如くウォータハンマーによる連通路113の水圧上昇で第2電磁弁13の弁体133が弁座131に圧接される。そのため、給水停止状態が長時間継続すると、第2電磁弁13の弁体133が弁座131に貼り付いてしまうがある。かくするときは、給水開始制御を実行しても第2電磁弁13が開弁せず、給水不能になる。   By the way, even in the water supply stop state in which all the first to third solenoid valves 12, 13, and 14 are closed, the valve body 133 of the second solenoid valve 13 is caused by the water pressure increase in the communication passage 113 by the water hammer as described above. The valve seat 131 is in pressure contact. Therefore, if the water supply stop state continues for a long time, the valve body 133 of the second electromagnetic valve 13 may stick to the valve seat 131. In this case, even if the water supply start control is executed, the second electromagnetic valve 13 does not open and water supply becomes impossible.

そこで、本実施形態では、図3に示す如く、給水停止制御の完了後に、S6のステップでタイマの計時動作を開始して、S1のステップに戻り、給水開始指令が出されていないときは、S7のステップでタイマの計時時間TMが所定時間YTM(例えば、24時間)以上になったか否かを判別するようにしている。このタイマは給水開始指令が出されたときにS2のステップでリセットされるため、その計時時間TMは給水停止状態の継続時間になる。   Therefore, in the present embodiment, as shown in FIG. 3, after completion of the water supply stop control, the timer starts the time counting operation in the step S6, returns to the step S1, and when the water supply start command is not issued, In step S7, it is determined whether or not the time count TM of the timer has exceeded a predetermined time YTM (for example, 24 hours). Since this timer is reset in step S2 when a water supply start command is issued, the time count TM is the duration of the water supply stop state.

そして、TM≧YTMになったとき、即ち、給水停止状態の継続時間が所定時間YTMに達したとき、S8のステップに進み、第3電磁弁14のソレノイド144に通電して第3電磁弁14を一定時間(例えば、1秒)だけ一時的に開弁させる。次に、S9のステップでタイマをリセットして再度計時動作を開始し、S1のステップに戻る。   When TM ≧ YTM, that is, when the duration of the water supply stop state reaches the predetermined time YTM, the process proceeds to step S8, and the solenoid 144 of the third solenoid valve 14 is energized to supply power to the third solenoid valve 14. Is temporarily opened for a certain time (for example, 1 second). Next, in step S9, the timer is reset and the time counting operation is started again, and the process returns to step S1.

これによれば、給水停止状態の継続時間が所定時間YTMに達する度に第3電磁弁14が一時的に開弁されることになる。そして、第3電磁弁14の一時的な開弁により、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の弁体133の弁座131に対する圧接が解除される。従って、第2電磁弁13の弁体133が弁座131に長時間圧接したままにならず、弁座131への弁体133の貼り付きが確実に防止される。その結果、給水開始制御により第1電磁弁12に先行して第2電磁弁13が確実に開弁し、その後の第1電磁弁12の開弁で確実に給水が行われる。   According to this, the third electromagnetic valve 14 is temporarily opened every time the duration of the water supply stop state reaches the predetermined time YTM. Then, by temporarily opening the third electromagnetic valve 14, the communication path 113 is depressurized via the third electromagnetic valve 14, and the pressure contact of the valve body 133 of the second electromagnetic valve 13 with respect to the valve seat 131 is released. . Therefore, the valve body 133 of the second electromagnetic valve 13 does not remain in pressure contact with the valve seat 131 for a long time, and the sticking of the valve body 133 to the valve seat 131 is reliably prevented. As a result, the second electromagnetic valve 13 is reliably opened prior to the first electromagnetic valve 12 by the water supply start control, and water is reliably supplied by the subsequent opening of the first electromagnetic valve 12.

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. 図3のS3のステップで実行する給水開始制御の詳細を示すフロー図。The flowchart which shows the detail of the water supply start control performed by the step of S3 of FIG. 図3のS5のステップで実行する給水停止制御の詳細を示すフロー図。The flowchart which shows the detail of the water supply stop control performed by the step of S5 of FIG.

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、15…コントローラ(制御手段)。   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, 15 ... controller (control means).

Claims (1)

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電磁弁と第2電磁弁に並列の第3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、
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第2電磁弁の弁体より小径の弁体と、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1乃至第3の全ての電磁弁が閉弁される給水停止状態の継続時間を計測する計時手段を備え、
第1乃至第3電磁弁を開閉制御する制御手段は、計時手段により計測される給水停止状態の継続時間が所定時間に達したときに、第3電磁弁のみを一時的に開弁させる制御を実行するように構成されていることを特徴とする給水弁装置。
A water supply valve device provided in a water supply channel of a device that uses water,
A first solenoid valve on the upstream side connected in series, a second solenoid valve on the downstream side, and a third solenoid valve in parallel with the second solenoid valve;
The first 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 pilot pressure solenoid valve including 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.
The second 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 drives the valve body to open and close,
The third solenoid valve is a direct acting solenoid valve including a valve body having a smaller diameter than the valve body of the second solenoid valve that opens and closes a valve hole having a smaller diameter than the valve hole of the second solenoid valve, and a solenoid that opens and closes the valve body. In what consists of:
Comprising time measuring means for measuring the duration of the water supply stop state in which all of the first to third solenoid valves are closed;
The control means for controlling the opening and closing of the first to third electromagnetic valves performs control to temporarily open only the third electromagnetic valve when the duration of the water supply stop state measured by the time measuring means reaches a predetermined time. A water supply valve device configured to execute.
JP2007076489A 2007-03-23 2007-03-23 Water supply valve device Expired - Fee Related JP4724142B2 (en)

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DE2805810A1 (en) * 1977-03-07 1978-09-14 Gen Electric COATING OF SILICON IRON MATERIAL
JPS5411522A (en) * 1977-06-27 1979-01-27 Matsushita Electric Ind Co Ltd Water feed valve device
JPS56127480A (en) * 1980-03-13 1981-10-06 Nec Corp Ink ribbon cartridge
JPS57124667A (en) * 1981-01-26 1982-08-03 Teruo Kawai Refrigerator
JPS59166075A (en) * 1983-03-10 1984-09-19 Youmeishiyu Seizo Kk Brewed liquor having low alcoholic content
JPS6369914A (en) * 1986-09-11 1988-03-30 Kawasaki Steel Corp Production of bar and wire rod having excellent wear resistance
JP3087514B2 (en) * 1993-05-20 2000-09-11 松下電器産業株式会社 Hot water mixing equipment
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JP2000139808A (en) * 1998-11-04 2000-05-23 Osaka Gas Co Ltd Dishwasher
JP2003194408A (en) * 2001-12-27 2003-07-09 Noritz Corp Negative pressure break device
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