JPS6066716A - Hot water feeder of bevarage extractor - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 〔発明の属する技術分野〕 本発明はコーヒーや紅茶或いは緑茶等を抽出する飲料抽
出装置の給湯装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical field to which the invention pertains] The present invention relates to a hot water supply device for a beverage extraction device for extracting coffee, black tea, green tea, etc.

コーヒー等の飲料は湯と簡単な濾し器があれば抽出は可
能であるが、おいしく抽出するためには熟練と手間を要
する。この熟練と手間を省いて常においしく抽出するた
めコーヒー等の飲料抽出装置が使用されてきた。ところ
でおいしいコーヒー等を抽出するためには、ｌ）抽出に
使用する湯の温度が適当であること。２）給湯量がコー
ヒー粉末等の原料の量に適合していること即ち正確な計
ｉ−給湯をすること。３）抽出時間が適当であること。Beverages such as coffee can be extracted using hot water and a simple strainer, but it requires skill and effort to extract deliciously. Beverage brewing devices for coffee and other beverages have been used in order to save the skill and effort and always brew delicious beverages. By the way, in order to extract delicious coffee etc., l) the temperature of the hot water used for extraction must be appropriate. 2) The amount of hot water supplied must match the amount of raw materials such as coffee powder, that is, the amount of hot water must be supplied accurately. 3) The extraction time is appropriate.

４）コーヒー粉末等の原料が新しいこと。５）コーヒー
粉末等の挽き万が抽出方法に合っていること。等が重要
である。4) Raw materials such as coffee powder are new. 5) The grind of coffee powder, etc. must match the extraction method. etc. are important.

〔従来技術〕[Prior art]

これらの事項のうち４）項および５）項は飲料抽出装置
とは直接関係はなく１）項ないし３）項が抽出装置にと
って重要である。従来のコーヒー抽出装置等においても
湯温はサーモスタット等により適温に制御されているが
、計を給湯については、密閉湯沸しタンクの給水管路に
流量制御弁を設は給水時間をタイマ制御して給水量を計
量しこれと同量の湯を押しあげて注出する方式や、湯沸
しタンク内の湯を耐熱性ポンプにより給湯しその給湯時
間をタイマで制御する方式及び特公昭５２−１４６７１
号公報に示されているような湯沸槽の上部に計量槽を設
け、計量槽にて容積計量した水を落差により湯沸槽の底
部へ導入して湯を計量注出する方式がある。Among these items, items 4) and 5) are not directly related to the beverage brewing device, but items 1) to 3) are important for the brewing device. Even in conventional coffee brewing equipment, the water temperature is controlled to an appropriate temperature using a thermostat, etc., but when it comes to water supply using a meter, a flow control valve is installed in the water supply pipe of the closed water boiling tank, and water is supplied by controlling the water supply time with a timer. There is a method in which the amount of hot water is measured and the same amount of hot water is pumped up and poured out, a method in which hot water in a water boiling tank is supplied with a heat-resistant pump and the hot water supply time is controlled by a timer, and a method in which the hot water supply time is controlled by a timer.
There is a method, as shown in the above publication, in which a measuring tank is provided at the top of the water boiling tank, and the volume of water measured in the measuring tank is introduced into the bottom of the water boiling tank by a drop, and the hot water is then metered out.

第１の方式は水道水圧が略０　、５　Ｋｇ　／ｃｒＩＬ
２　から略１０Ｋｆ／ｉまでと地域によってまちまちで
あり、かつ時間帯によっても大巾に変化するため流量制
御弁で流量を一定に保つことは困難である。第２の方式
は湯温が沸騰点近くの（３）度以上であるため、ポンプ
に吸い込む除虫ずる負圧によりポンプ室内で沸騰現象を
生じ、ポンプ吐出量が非常に不安定になって給湯量が変
動する。このように正確な計量給湯ができないと抽出ご
とにコーヒー液等の味と量が変化することとなり、また
抽出時間は給湯量と密接な関係を有しているため、給湯
量の変動によって抽出時間も変化し最適抽出条件から外
れ飲料の味を落していた。第３の方式は計量槽で容積計
量するので給水水圧に影響されず正確な計量、給湯がで
きるが計を槽を湯沸槽より上に設けなければならず、大
容量抽出装置の場合１回の給湯量は１０１以上になり計
量槽の寸法が非常に大きくなり、そのため装置の高さが
非常に高くなり店舗設備として設置寸法上の支障を生ず
るほか、安定性、操作性も悪く、又湯沸槽内の湯沸しに
よる水の膨張分を計量槽の底部に吸収するため、計量槽
の底（３） 部と湯沸槽は待機時には連通状態にしておかなければな
らず、抽出の都度計量槽は全量を計量することとなり給
湯量が大量になると計量時間も長くかかり、飲料を抽出
するまでの待時間が長くなる欠点があった。さらに−回
の抽出量が多い大形の飲料抽出装置は多人数に飲料を提
供するには便利であるが、少人数に提供する場合特にコ
ーヒー液の場合は長く保温貯液すると酸化して味が劣化
するので、−回の抽出量を少くとも大小２段階或いはそ
れ以上に切り替えることのできるものが望まれている。In the first method, the tap water pressure is approximately 0.5 Kg/crIL.
The flow rate varies from region to region, ranging from 2 to approximately 10 Kf/i, and also varies widely depending on the time of day, making it difficult to maintain a constant flow rate with a flow rate control valve. In the second method, since the water temperature is above (3) degrees, near the boiling point, the negative pressure sucked into the pump causes a boiling phenomenon in the pump chamber, making the pump discharge amount extremely unstable and causing hot water supply. The amount fluctuates. If accurate metered hot water supply is not possible in this way, the taste and amount of coffee liquid etc. will change with each extraction.Furthermore, the brewing time is closely related to the amount of hot water supplied, so the extraction time may vary depending on the amount of hot water supplied. The extraction conditions also changed, deviating from the optimal extraction conditions and reducing the taste of the beverage. The third method uses a measuring tank to measure the volume, so it is possible to accurately measure and supply hot water without being affected by the water supply pressure, but the meter must be installed above the water tank, and in the case of a large-capacity extraction device, it can be done once. The amount of hot water supplied is 101 or more, and the dimensions of the measuring tank are very large.As a result, the height of the device is very high, which causes problems in terms of installation dimensions as store equipment, and the stability and operability are poor. In order to absorb the expansion of water caused by boiling water in the boiling tank into the bottom of the measuring tank, the bottom (3) of the measuring tank and the water boiling tank must be kept in communication during standby, and the measuring tank must be opened each time when brewing. Since the entire amount of hot water is measured, it takes a long time to measure the amount of hot water that is supplied, which has the drawback of increasing the waiting time before brewing the beverage. Furthermore, large-sized beverage brewing devices that can extract a large amount of water each time are convenient for serving drinks to a large number of people, but when serving a small number of people, especially coffee liquid, if it is kept warm for a long time, it will oxidize and taste bad. Therefore, there is a need for something that can switch the amount of extraction in at least two stages, large and small, or more.

従来装置でも給湯量の変更は可能であるが、この変更に
見合った最適抽出時間を確保するための給湯流量の変更
ができず抽出飲料の味を犠牲にすることとなる。Although it is possible to change the amount of hot water supplied using conventional devices, the flow rate of hot water supply cannot be changed to ensure an optimal brewing time commensurate with this change, and the taste of the brewed beverage will be sacrificed.

〔発明の目的〕[Purpose of the invention]

本発明はこのような欠点を除去したものでその目的は、
飲料の原料に安定した量の湯を所定の散湯時間でふりか
けることＫより最良の飲料を得ると共に、装置の高さ寸
法を低くして且つ大容量抽出を可能とするほか計量時間
を短縮してスビーデ（４） イな抽出を可能とし、更に又−回の抽出量を客数等に応
じて容易に変更し得る構成の飲料抽出装置の給湯装置を
提供することにある。The present invention eliminates these drawbacks, and its purpose is to:
By sprinkling a stable amount of hot water onto the beverage ingredients at a predetermined sprinkling time, we can obtain the best possible beverage, reduce the height of the device, enable large-capacity extraction, and shorten measuring time. (4) It is an object of the present invention to provide a hot water supply device for a beverage brewing device having a configuration that enables efficient brewing and also allows the amount of brewing times to be easily changed depending on the number of customers.

〔発明の要点〕[Key points of the invention]

本発明における飲料抽出装置の給湯装置は、水位検知器
を内装した計量槽と、同計量槽へ給水源の水を導びく給
水管と、同給水管の途中に設けられ前記水位検知器によ
り開閉を制御される給水電磁弁と、温度制御装置で制御
されるヒーターを備えた湯沸槽と、前記計量槽から前記
湯沸槽の底部へ送水するポンプと、同ポンプＶＣｉ列に
接続された水用電磁弁及び流量制御弁と、一端を湯沸槽
の上面に接続しその中間な湯沸槽上面より高くかつ他端
の吐出口を下向にした出湯管と、湯沸槽の上面に内部を
連通して立設されかつその上面を外気に連通した貯湯筒
と、一端を湯沸槽の底面に接続し中間に連通電磁弁を設
けると共に他端が計量槽内で湯沸槽上面より高く出湯管
の吐出口より低い位置に開口した連通管とからなり、水
位検知器は計′Ｉｋ檜内の水位が上位の所定レベルに達
すると給水電磁弁を閉じると共にポンプの運転を開始し
、同水位が下位の所定レベルに低下した時停止し、且つ
同ポンプの運転中は水用ｔｉ弁を開き、連通電磁弁を閉
じるように構成されたことを特徴とする。The water supply device for a beverage brewing device according to the present invention includes a measuring tank equipped with a water level detector, a water supply pipe that leads water from a water supply source to the measuring tank, and a water supply pipe provided in the middle of the water supply pipe that is opened and closed by the water level detector. a water supply solenoid valve that is controlled by a water supply solenoid valve, a water boiler tank that is equipped with a heater that is controlled by a temperature control device, a pump that feeds water from the metering tank to the bottom of the water boiler tank, and a water tank that is connected to the pump VCi row. A solenoid valve and a flow rate control valve, a hot water outlet pipe whose one end is connected to the top surface of the water boiling tank and whose outlet is higher than the top surface of the water boiler in the middle and whose discharge port at the other end is directed downward; A hot water storage cylinder that is erected in communication with the water tank and whose top surface is connected to the outside air, one end of which is connected to the bottom of the water boiling tank, a communication solenoid valve is provided in the middle, and the other end is located within the metering tank and is higher than the top surface of the water boiler tank. It consists of a communicating pipe that opens at a position lower than the discharge port of the hot water tap, and the water level detector closes the water supply solenoid valve and starts operating the pump when the water level in the water pipe reaches a predetermined upper level. The pump is characterized in that it is configured to stop when the water level drops to a lower predetermined level, and to open the water TI valve and close the communication solenoid valve while the pump is in operation.

〔発明の実施例〕[Embodiments of the invention]

以下本発明忙ついて一実施例を示した図によりコーヒー
を例にして説明する。第１図において、ケース（図示せ
ず）の内部には計量槽１】と湯沸槽１２が収納されてお
り、計量槽１】内には上から上限水位ＬＶ１と待機水位
Ｌｖ２そして下限水位ＬＶ３が設定され、この水位を検
知するためフロート１３を有する水位検知器１４が設け
である。また計量槽１１の上面には元端を水道等の給水
源（図示せず）Ｋ接続され、中間に給水電磁弁１５を設
けた給水管１６の一端が開口し、この一端は給水源が負
圧になったとき計量槽１】内の水が逆流しないように計
を槽１】内の水面に対し一定距離を保って開口している
。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below using coffee as an example, with reference to figures showing one embodiment of the present invention. In Fig. 1, a measuring tank 1] and a hot water tank 12 are housed inside a case (not shown), and inside the measuring tank 1, from the top, there is an upper limit water level LV1, a standby water level Lv2, and a lower limit water level LV3. is set, and a water level detector 14 having a float 13 is provided to detect this water level. In addition, one end of a water supply pipe 16 is connected to the upper surface of the measuring tank 11 at its base end to a water supply source (not shown) such as tap water, and a water supply solenoid valve 15 is provided in the middle. The meter is opened at a certain distance from the water surface in the measuring tank 1 to prevent the water in the measuring tank from flowing back when pressure is reached.

計量Ｗ１１】の底部にはポンプ１７の吸込側が接続され
、ポンプ１７の吐出側は２分されそれぞれは水用電磁弁
１８および１９と流量調整弁２ｏおよび２１とが谷々直
列に接続された後再び合流し、立上り管ρとして湯沸槽
１２内を貫通し湯沸槽１２から計量槽ｌ】への逆流を防
ぐため湯沸槽１２の上方で開口している。The suction side of the pump 17 is connected to the bottom of the meter W11, and the discharge side of the pump 17 is divided into two parts, each of which has water solenoid valves 18 and 19 and flow rate adjustment valves 2o and 21 connected in series. The rising pipe ρ passes through the water boiling tank 12 and opens above the water boiling tank 12 to prevent backflow from the water boiling tank 12 to the metering tank 1.

立上り管ηから流出した水は、一端を閉じ他端を湯沸槽
１２の底面近くまで伸ばした外管羽の上端に当った後外
管乙内を伝わって湯沸槽１２の底部に流入する。湯沸槽
１２の下方には温度制倶装に２４によりｗ＋＋　（ｉｌ
ｌされるヒータδが設けてあり、上面には湯沸槽１２内
の湯を抽出器部内にフィルタｎを介して入れられたコー
ヒー粉末四へ散湯するための出湯管器の一端が取付けら
れ、出湯管器の中間は前記した一端より高く位置しかつ
他端には多数の小孔を有する散水器側が取付けである。The water flowing out from the riser pipe η hits the upper end of the outer pipe blade, which has one end closed and the other end extends close to the bottom of the water boiling tank 12, and then flows through the outer pipe O and flows into the bottom of the water boiling tank 12. . Below the water boiling tank 12, a temperature control device 24 is installed with w++ (il
A heater δ is provided for heating, and one end of a hot water pipe for sprinkling the hot water in the water boiling tank 12 onto the coffee powder 4 introduced into the extractor section through a filter n is attached to the top surface. The middle of the hot water pipe is located higher than the one end mentioned above, and the other end is attached to the water sprinkler side, which has a large number of small holes.

湯沸槽１２の上面には出湯時に出湯管器より湯面を高く
保つため、比較的内径が大きくかつ上端を大気に開放し
た貯湯筒３１が取付けである。この貯湯筒３１の上部に
はポンプ１７による給水量が過剰になって貯湯筒３１内
の液面が上昇し過ぎたときのため、計量槽１］の上面に
一端を開口したオーバフロー管３２の他端が取付けられ
ている。また湯沸槽１２の底面にはポンプ１７の通電時
には閉になる×連通′Ｗ１１ｉＩｉ弁３３を有する連通
管あの一端が取付けられ、連通管あの他端は計ｉ′槽１
】内を貫通しかっ湯沸槽１２の上面より高く散水器側よ
り低い位置に開口している。これにより一回の抽出が終
了する毎に湯沸槽１２内の待機水位を一定にすると共に
待機中の湯沸しＫよる体積膨張分を計量槽１】内に吸収
して湯沸槽１２の湯の水位が変化することを防ぎ抽出各
回におけるコーヒー粉末あへの散湯量を一定にしている
。貯湯筒３１の上方開口部には元端を給水源に接続し中
間に給水電磁弁あを設けた給水管間の一端が開口し、貯
湯筒３１の壁面近くには給水管３６からの給水量を制御
するフロートスイッチ３７が設けである。また計量槽ｌ
】および湯沸槽１２の底面には排水管あおよび３９が設
けである。A hot water storage cylinder 31 with a relatively large inner diameter and an upper end open to the atmosphere is attached to the top surface of the hot water tank 12 in order to keep the hot water level higher than the hot water tap when hot water is tapped. In the upper part of this hot water storage cylinder 31, there is an overflow pipe 32 with one end opened on the top surface of the measuring tank 1, in case the amount of water supplied by the pump 17 becomes excessive and the liquid level in the hot water storage cylinder 31 rises too much. The ends are attached. Further, one end of a communication pipe having a x communication 'W11iIi valve 33 which is closed when the pump 17 is energized is attached to the bottom of the water boiling tank 12, and that other end of the communication pipe is connected to the tank i'.
] It penetrates inside and opens at a position higher than the top surface of the water boiling tank 12 and lower than the sprinkler side. As a result, each time one extraction is completed, the standby water level in the water boiler 12 is kept constant, and the volumetric expansion caused by the water boiler K on standby is absorbed into the measuring tank 1], and the hot water in the water boiler 12 is increased. This prevents the water level from changing and keeps the amount of water sprinkled on the coffee powder constant each time it is extracted. At the upper opening of the hot water storage cylinder 31, one end between the water supply pipes whose base end is connected to a water supply source and a water supply solenoid valve is provided in the middle is opened, and near the wall of the hot water storage cylinder 31, the amount of water supplied from the water supply pipe 36 is opened. A float switch 37 is provided to control this. Also, measuring tank l
] A drain pipe and 39 are provided on the bottom of the water boiling tank 12.

次に前述した実施例の動作について第２図を参照しなが
ら説明する。先づ本装置を電源につなぐとフロートスイ
ッチ３７の接点Ｒ８Ｏは閉じているのでリレーＩＲは励
磁され、その接点ＩＲＩが閉じ（９） 給水電磁弁あのソレノイドＷＶＩに通電されることによ
り給水管路あから湯沸槽１２に給水され、その後水位が
一定位置まで上昇するとフロートスイッチ３７の接点Ｒ
１９０は開いて給水は停止する。給水中は１Ｊｌｚ−Ｉ
ＲのＢ接点ＩＲ２は開いているのでヒータＨ（第１図の
ヒータ２５）には通電されず空焚きは防止されており、
給水が停止し湯沸槽１２に所定量の水が貯えられるとＢ
接点ＩＲ２は閉じ温度制御装置別の接点ＴＨを介してリ
レー５Ｒが励磁され、その人接点５Ｒ１が閉じてヒータ
Ｈに通電されることにより湯沸槽１２内の冷水は所定の
温度に加熱制御される。Next, the operation of the embodiment described above will be explained with reference to FIG. First, when this device is connected to the power supply, the contact R8O of the float switch 37 is closed, so the relay IR is energized, and its contact IRI is closed (9).The water supply solenoid valve solenoid WVI is energized to open the water supply pipe. Water is supplied to the water boiling tank 12 from
190 is opened and water supply is stopped. 1Jlz-I during water supply
Since R's B contact IR2 is open, heater H (heater 25 in Figure 1) is not energized and dry heating is prevented.
When the water supply is stopped and a predetermined amount of water is stored in the hot water tank 12, B
The contact IR2 is closed, and the relay 5R is energized via the contact TH of the temperature control device, and the contact 5R1 is closed and the heater H is energized, so that the cold water in the water boiling tank 12 is heated to a predetermined temperature. Ru.

この初期湯沸時において冷水が加熱されて生ずる体積膨
張分の大部分は、湯沸槽１２の底部と計量槽１】の上部
を連通ずる連通管３４を通って計量槽１】に排出される
。なおこのとき連通管３４の中間に設けた連通電磁弁３
３はポンプ１７が運転されていないので開いている。こ
のようにして湯沸槽１２の湯の液位は計量槽１１内の連
通管あの開口部と同一レベルに保たれ常に一定である。Most of the volume expansion that occurs when the cold water is heated during this initial water boiling is discharged into the measuring tank 1 through the communication pipe 34 that communicates the bottom of the water boiling tank 12 with the top of the measuring tank 1. . At this time, the communication solenoid valve 3 provided in the middle of the communication pipe 34
3 is open because the pump 17 is not in operation. In this way, the liquid level of the hot water in the hot water tank 12 is kept at the same level as the opening of the communicating pipe in the metering tank 11, and is always constant.

（１０） −万計量檜１１については最初下限水位検知素子Ｒ８３
！よび待機水位検知素子Ｒ８２は閉じているので、リレ
ー４Ｒおよび３Ｒは励磁されておりそのＡ接点４Ｒ２お
よび３Ｒ２を閉じてリレー８Ｒを励磁してその人接点８
Ｒ１を閉じると共ＩＣ１他のＡ接点８Ｒ２を閉じて給水
電磁弁１５のソレノイドＷＶ２を励磁して開弁すること
により管路■６から計量Ｗ１１】へ給水する。給水が進
むと水位は上昇して下限水位検知素子Ｒ８３は開き、Ａ
接点４Ｒ２は開くが並列のＡ接点８Ｒ１は閉じているの
で給水は継続する。さらに水位が上昇して待機水位検知
素子Ｒ８２が開くとＡ接点３Ｒ２が開いてリレー８Ｒは
非励磁になり、その結果Ａ接点８Ｒ２は開いてソレノイ
ｒｗｖ２も非励磁になるので給水１！磁弁１５は閉じて
待機状態になる。(10) - For 11,000 metering hinoki 11, first lower limit water level detection element R83
! and standby water level detection element R82 are closed, relays 4R and 3R are energized, and their A contacts 4R2 and 3R2 are closed to energize relay 8R and the person contact 8 is energized.
When R1 is closed, IC1 and other A contacts 8R2 are closed, and the solenoid WV2 of the water supply solenoid valve 15 is energized and opened, thereby supplying water from the conduit 6 to the metering W11. As the water supply progresses, the water level rises and the lower limit water level detection element R83 opens, and A
Contact 4R2 is open, but parallel A contact 8R1 is closed, so water supply continues. When the water level further rises and the standby water level detection element R82 opens, the A contact 3R2 opens and the relay 8R becomes de-energized.As a result, the A contact 8R2 opens and the solenoid rwv2 also becomes de-energized, so water supply 1! The magnetic valve 15 closes and enters a standby state.

続いて大容量抽出について説明する。抽出に際しては先
づ選択スイッチ８Ｗ１を大容量側に合せた後（第２図に
おいて図示の位置）、コーヒー粉末あおよびイーノソー
フィルタｎを収納した抽出器部を散水器間の真下にセッ
トしてから押釦Ｐ　Ｂ’を押す。押釦ＰＢの操作により
リレー６Ｒは励磁されてＡ接点６Ｒ１により自己保持さ
れ、Ａ接点６Ｒ２によりソレノイドＷＶ２を励磁して給
水電磁弁１５を開いて計量槽１１へ給水する。水位が上
昇して上限水位検知素子Ｒ８１を閉じるとリレー２Ｒは
励磁されそのＢ接点２Ｒ１を開いて、リレー６Ｒを非励
磁とし給水電磁弁１５を閉じて給水を停止する。Next, large-capacity extraction will be explained. When brewing, first set the selection switch 8W1 to the large capacity side (the position shown in Figure 2), and then set the extractor section containing the coffee powder and Enoso filter n directly below between the water sprinklers. Then press push button P B'. By operating the push button PB, the relay 6R is energized and self-held by the A contact 6R1, and the A contact 6R2 energizes the solenoid WV2 to open the water supply solenoid valve 15 and supply water to the measuring tank 11. When the water level rises and closes the upper limit water level detection element R81, the relay 2R is energized and its B contact 2R1 is opened, the relay 6R is de-energized, the water supply solenoid valve 15 is closed, and the water supply is stopped.

リレー２Ｒの励磁によりそのＡ接点２Ｒ２は閉じてリレ
ー７Ｒを励磁しその人接点７Ｒ４を閉じてソレノイドＷ
Ｖ３を作動させて、連通電磁弁３３を閉じて連通管３４
を非連通にすると同時に、ソレノイＦ″ＷＶ４を作動さ
せて水用電磁弁１８を開くと共にポンプ１７の電動機Ｐ
Ｍを回転させる。ポンプ１７を出た水はｆｌｒＦ、量調
整弁Δ】Ｋより大容量抽出に適した流量になって、立上
り管ηから外管乙の内側を伝わって湯沸槽重２の底部に
流入し上方の比重の軽い湯を貯湯筒３１へ押しあげ、そ
の湯面が出湯管器の頂部を超えると湯は散水器間からコ
ーヒー粉末あに散湯されコーヒー液になって容器４１に
流下（１］） する。When relay 2R is energized, its A contact 2R2 closes, energizing relay 7R, which closes its contact 7R4 and solenoid W.
Activate V3, close the communication solenoid valve 33, and open the communication pipe 34.
At the same time, the solenoid F''WV4 is activated to open the water solenoid valve 18 and the electric motor P of the pump 17 is disconnected.
Rotate M. The water exiting the pump 17 has a flow rate suitable for large-volume extraction from the flrF and volume adjustment valve Δ]K, flows from the riser pipe η to the inside of the outer pipe O, flows into the bottom of the water heater tank 2, and flows upward. Hot water with a light specific gravity is pushed up to the hot water storage cylinder 31, and when the hot water level exceeds the top of the hot water pipe, the hot water is sprinkled with coffee powder from between the water sprinklers, becomes coffee liquid, and flows down into the container 41 (1) ) do.

さらに湯沸槽１２内の湯面は貯湯筒３１内を上昇し続け
やがて出湯前回を流れる流量と、Ｉンプエ７から流量調
整弁間を通って湯沸［１２に送り込まれる流量が一致す
る水位まで上昇して安定する。その結果、散水器（資）
と、貯湯筒３１の液位とのヘッド差はほぼ一定の値とな
り散水器間から所要の流量で安定した散湯がなされる。Furthermore, the level of hot water in the hot water tank 12 continues to rise in the hot water storage cylinder 31 until it reaches a water level where the flow rate before hot water discharge and the flow rate from the input 7 through the flow rate adjustment valve to the hot water boiler [12] match. rise and stabilize. As a result, water sprinkler (equipment)
The head difference between the water level and the liquid level in the hot water storage cylinder 31 becomes a substantially constant value, and hot water is stably sprayed from between the water sprinklers at the required flow rate.

一方計量槽１】においてはポンプ１７により湯沸槽１２
へ送水されるため水位が低下してゆき、散水器側からコ
ーヒー粉末列に散湯する出湯量に相当する冷水量を送り
出すと下限水位となり下限水位検知素子Ｒ８３が閉じ、
＋７レー４Ｒが励磁されそのＢ接点４Ｒ１が開放されリ
レー７Ｒが非励磁となる。これによりポンプ７のモータ
ＰＭは停止し、かつ水用電磁弁１８が閉じ、同時忙連通
管あの中途に設けられた連通電磁弁おが開き湯沸［１２
内の湯の一部は計量槽１１に流入する。On the other hand, in the metering tank 1, the water boiling tank 12 is
As the water is sent to the coffee powder row, the water level decreases, and when the water sprinkler side sends out an amount of cold water equivalent to the amount of hot water to be sprayed on the coffee powder row, the lower limit water level is reached, and the lower limit water level detection element R83 closes.
+7 relay 4R is energized, its B contact 4R1 is opened, and relay 7R is de-energized. As a result, the motor PM of the pump 7 is stopped, the water solenoid valve 18 is closed, and at the same time the communication solenoid valve installed in the middle of the busy communication pipe opens.
A part of the hot water inside flows into the measuring tank 11.

これにより貯湯筒３１内の液位は速かに散水器間のレベ
ルより低下し、散水器Ｊ）からの用湯は停止される。As a result, the liquid level in the hot water storage cylinder 31 quickly drops below the level between the water sprinklers, and hot water from the water sprinkler J) is stopped.

（１２） 計量槽１１において下限水位検知素子Ｒ８３が閉じたこ
とによりリレー８Ｒも励磁され、ソレノイドＷＶ２を作
動させて給水電磁弁１５を開き、給水管路１６から計量
槽ｌ】へ給水が行なわれ、同権１１の水位を上昇させや
がて待機水位検知素子Ｒ８２が開き、リレー３Ｒを非励
磁としその人接点３Ｒ２が開きリレー８Ｒが非励磁とな
り、給水電磁弁１５を閉じ給水を停止させ待機状態とな
る。(12) When the lower limit water level detection element R83 closes in the measuring tank 11, the relay 8R is also excited, and the solenoid WV2 is activated to open the water supply solenoid valve 15, and water is supplied from the water supply pipe 16 to the measuring tank 1. , the water level of the same authority 11 is raised, the standby water level detection element R82 is opened, the relay 3R is de-energized, its human contact 3R2 is opened, the relay 8R is de-energized, the water supply solenoid valve 15 is closed, the water supply is stopped and the standby state is established. Become.

前記の抽出において湯沸槽１２内は計量槽１】から冷水
をポンプ１７により送り込まれるため湯沸槽１２内に取
付けられた温度制御装置別の感温部は湯温の低下を感知
し、ヒータδへの通電を開始し湯温を所定の温度まで上
昇させる。この加熱により湯沸槽１２内にて体積膨張し
た増分は連通管あを通り湯沸槽１２の上面より高くかつ
散水器間より低い位置の開口部より計量槽１］へ流入す
るようになっており、湯沸槽１２の液面レベルは一定に
保たれる。In the above-mentioned extraction, cold water is pumped into the water boiling tank 12 from the metering tank 1 by the pump 17, so a temperature sensing section separate from the temperature control device installed inside the water boiling tank 12 senses a drop in the water temperature and turns the heater on. Start energizing δ and raise the water temperature to a predetermined temperature. The incremental volume expansion in the water boiling tank 12 due to this heating flows into the measuring tank 1 through the communication pipe A and an opening located higher than the top surface of the water boiling tank 12 and lower than between the water sprinklers. Therefore, the liquid level in the water boiling tank 12 is kept constant.

次に小容量コーヒー抽出時について説明する。Next, the case of brewing a small amount of coffee will be explained.

選択スイッチＳＷＩを小容量側に切換えた後抽出器間を
設置し押ボタンＰＢを押す。その胛渾ナツ茫÷Ｉｅ−ｍ
−Ｆ。この押ボタンＰＢの操作によりリレー６Ｒが励磁
されソレノイｒｗｖ２を作動させて給水電磁弁１５を開
く。そこで給水管路１６から計量槽１１へ給水が行なわ
れ、四槽１】の水位を上昇させやがて上限水位検知素子
Ｒ８Ｉを閉じる。そこでリレー２Ｒが励磁され、そのｂ
接点２Ｒ１が開いてリレー６Ｒを非励磁とし給水電磁弁
１５を閉じ給水を停止させる。同時にリレー７Ｒが励磁
され、ソレノイドＷＶ３を作動させて連通ｔＷＢ弁３３
を閉じ、連通管讃を塞ぐと共に、ソレノイドＷＶ５を作
動させて水用電磁弁１９を開き、ポンプ１７のモータＰ
Ｍを回転させる。この結果ポンプ１７を出た水は流ｔ？
ｌ！１．制御弁２】により小容量抽出に適した流量にな
って、立上り管ηおよび外管おを介して湯沸槽１２の底
部に流入し、前述した大容量抽出時とほぼ同様に湯沸槽
１２内の湯を散水器（９）からコーヒー粉末路に散布す
る。ただし、この小容量抽出時には、大容量抽出時の流
量制御伸側と設定流量が異なる流量制御弁２１を介して
湯沸槽１２へ給水を行なうため、出湯時に該給水と散水
器間からの出湯量がバランスする貯湯筒３１内の液位は
大容量抽出時と異なり、小容量抽出に適したＲ量割合で
出湯し、良好なコーヒー液を抽出する。After switching the selection switch SWI to the small capacity side, install the extractor and press the push button PB. That victory is Natsu ÷ Ie-m
-F. By operating this push button PB, the relay 6R is energized and the solenoid rwv2 is operated to open the water supply solenoid valve 15. Then, water is supplied from the water supply pipe 16 to the measuring tank 11, raising the water level in the four tanks 1 and eventually closing the upper limit water level detection element R8I. So relay 2R is energized and its b
Contact 2R1 opens, de-energizes relay 6R, closes water supply solenoid valve 15, and stops water supply. At the same time, relay 7R is energized, operating solenoid WV3 and communicating tWB valve 33.
closes the communication pipe, and operates the solenoid WV5 to open the water solenoid valve 19, and the motor P of the pump 17
Rotate M. As a result, the water coming out of the pump 17 is a flow t?
l! 1. control valve 2], the flow becomes suitable for small-volume extraction, and flows into the bottom of the water boiling tank 12 via the riser pipe η and the outer pipe O, and the water boiling tank 12 is heated in almost the same manner as in the case of large-volume extraction described above. The hot water inside is sprinkled from the sprinkler (9) onto the coffee powder path. However, during this small volume extraction, water is supplied to the water boiling tank 12 via the flow rate control valve 21 whose set flow rate is different from the flow rate control extension side during large volume extraction, so when hot water is dispensed, the water is supplied from between the water supply and the sprinkler. The liquid level in the hot water storage cylinder 31 where the amount of hot water is balanced is different from that during large-capacity extraction, and hot water is dispensed at an R amount ratio suitable for small-volume extraction to extract a good coffee liquid.

一万計量槽１１においてはポンプ１７により湯沸槽１２
へ送水されるため水位が低下してゆき、小容量抽出時散
水器閏よりコーヒー粉末路に散湯する出湯量に相当する
冷水量を送り出すと待機水位となり待機水位検知素子Ｒ
８２が閉じ、リレー３Ｒを励磁しそのＢ接点３Ｒ１が開
放されリレー７Ｒが非励磁となる。これによりポンプ１
７のモータＰＭは停止し、水用１！磁弁１９が閉じ、連
通管あの中途に設けられた連通を磁弁３３は開く。これ
により湯沸槽１２の上部の貯湯筒３１内の液位は速かに
散水器３００レベルより低下し、散水器間よりの出湯は
停止される。In the 10,000 metering tank 11, the pump 17
As the water is sent to the coffee powder path, the water level decreases, and when the amount of cold water equivalent to the amount of hot water sprinkled onto the coffee powder path is sent out from the water sprinkler during small-capacity brewing, the water level becomes the standby water level and the standby water level detection element R
82 is closed, the relay 3R is energized, its B contact 3R1 is opened, and the relay 7R is de-energized. This allows pump 1
Motor PM 7 stops and water 1! The magnetic valve 19 closes, and the magnetic valve 33 opens the communication provided in the middle of the communication pipe. As a result, the liquid level in the hot water storage cylinder 31 at the top of the water boiling tank 12 quickly drops below the water sprinkler 300 level, and hot water from between the water sprinklers is stopped.

本装置においては湯沸槽１２内の湯温は温度制御装置別
により所定の温度域にて制御されている。In this device, the temperature of the water in the water boiling tank 12 is controlled within a predetermined temperature range by a separate temperature control device.

すなわち湯沸槽１２内の湯温は四槽１２内のヒータ５の
通電終了直後に最高設定温度となり、時間経過とともに
湯沸槽１２の壁面からの放熱により湯温は（１５） 低下してゆき、やがて最低設定温度となり、再度ヒータ
５が通電を開始し、湯温を上昇させる。待機時において
はこの動作をくりかえしている。In other words, the water temperature in the water boiling tank 12 reaches the maximum set temperature immediately after the heaters 5 in the four tanks 12 are energized, and as time passes, the water temperature decreases by (15) due to heat radiation from the walls of the water boiling tank 12. Eventually, the lowest set temperature is reached, and the heater 5 starts energizing again to raise the water temperature. This operation is repeated during standby.

小容量コーヒー抽出において湯沸槽１２内のヒータ５が
通電終了＠後、すなわち湯沸槽１２内の湯温が最高設定
温度の状態から抽出を開始した場合、温度制御装置別が
湯沸槽１２内の湯温の低下を感知するまでには、計量槽
１】よりポンプ１７にて湯沸槽１２の底部へ送り込まれ
る冷水量が少ないため長い時間を必要とする。このため
出湯中にヒータ５が通電されることはなく、出湯後しば
らくしてからヒータ５が通電を開始するが、ヒータ５が
通電を開始する直前に抽出を開始すると湯沸槽１２から
の出湯中に四槽１２内のヒータ５が通電を開始し、湯沸
槽１２内に給水された冷水が加熱されたことにより体積
膨張する。さらにヒータ２５の表面より発生する気泡に
より気泡の体積分だけ貯湯量が増加したことになり、出
湯中にヒータ５が通電しない場合に比較して前述の体積
膨張分が増加して出湯する。このため小容量抽出時にお
いては出湯筒器か（１６） ら出湯中すなわち計量槽ｌ】からポンプ１７にて冷水な
湯沸槽１２の底部へ給水中は、電気回路上から湯沸槽１
２内に設けられた温度制御装置別の感温部が四槽１２内
の湯温低下を感知してもヒータ５への通電を行なわない
ように制御し、出湯後に湯沸槽へ給水された冷水を加熱
するようにしである。即ちヒータ２５（第２図において
はＨ）の通電を制御するリレー５Ｒの励磁回路にはポン
プ１７のモータＰＭの運転制御を行うリレー７ＲのＢ接
点７Ｒ１が入っているのでポンプ１７の運転中はヒータ
５に通電されることはない。When brewing small-capacity coffee, after the heater 5 in the water boiling tank 12 has finished energizing, that is, when extraction is started from a state where the water temperature in the water boiling tank 12 is at the highest set temperature, the temperature control device is different from the water boiling tank 12. It takes a long time to detect a drop in the water temperature in the boiling water tank because the amount of cold water sent from the measuring tank 1 to the bottom of the water boiling tank 12 by the pump 17 is small. For this reason, the heater 5 is not energized during hot water dispensing, and the heater 5 starts energizing a while after hot water is dispensed, but if extraction is started immediately before the heater 5 starts energizing, hot water is dispensed from the water boiling tank 12. Inside, the heaters 5 in the four tanks 12 start energizing, and the cold water supplied into the water boiling tank 12 is heated and expands in volume. Furthermore, due to the bubbles generated from the surface of the heater 25, the amount of stored hot water increases by the volume of the bubbles, and the volumetric expansion described above increases compared to when the heater 5 is not energized during hot water dispensing. For this reason, when brewing a small volume of water, when water is being dispensed from the hot water dispenser (16), that is, from the measuring tank 1 to the bottom of the hot water tank 12, where cold water is supplied by the pump 17, the electric circuit is connected to the hot water tank 1.
Even if the temperature sensing part of the temperature control device installed in the four tanks 12 detects a drop in the water temperature, the heater 5 is controlled not to be energized, and water is supplied to the water boiling tank after hot water is dispensed. It is designed to heat cold water. That is, the B contact 7R1 of the relay 7R, which controls the operation of the motor PM of the pump 17, is included in the excitation circuit of the relay 5R, which controls the energization of the heater 25 (H in FIG. 2). The heater 5 is not energized.

ヒータ５をこのように制御することにより小容量抽出に
おいては常に出湯中にはヒータ５が通電されないため、
ヒータｚ５の冷水加熱による体積膨張およびヒータ５の
表面から発生する気泡による体積増加をさけることがで
き、きわめて安定した出湯量を得ることができる。尚大
容量抽出の場合は給水する冷水量が多いので毎回出湯中
に湯沸し工程が入るので湯沸し工程が入るので湯沸によ
る影響は毎回同一となり出湯量の変化はほとんど生じた
い。また湯沸槽１２内の貯湯量は給水される冷水量に比
較して多いため湯沸槽１２より出湯される湯温はほとん
ど低下しない。By controlling the heater 5 in this way, the heater 5 is not energized during hot water dispensing in small volume extraction.
It is possible to avoid volumetric expansion due to heating of cold water by the heater z5 and volumetric increase due to bubbles generated from the surface of the heater 5, and it is possible to obtain an extremely stable amount of hot water. In addition, in the case of large-capacity extraction, the amount of cold water to be supplied is large, so a boiling process is included during each tap, so the effect of boiling the water is the same each time, and the amount of hot water dispensed should hardly change. Further, since the amount of hot water stored in the water boiling tank 12 is larger than the amount of cold water supplied, the temperature of the hot water discharged from the water boiling tank 12 hardly decreases.

以上の説明では出湯量を大小２段切り替えとして説明し
たが計量槽内の水位検知器が検知する下限水位を複数段
げてこれを選択スイッチにより切り替えるようにすれば
出湯量は多段に変化させることができる。又ポンプによ
る冷水送り出し流量を制御する流量調整弁も本実施例の
如く固定調整弁を複数個設けて前記選択スイッチと連動
して切り替える方式のほか１個の可変調整弁を設けて前
記選択スイッチと連動してこの弁の絞り加減を変える方
式をとることもできる。In the above explanation, the amount of hot water dispensed was explained as switching between large and small steps, but if the lower limit water level detected by the water level detector in the metering tank is increased in multiple steps and this is switched by a selection switch, the amount of hot water delivered can be changed in multiple steps. I can do it. Furthermore, the flow rate regulating valve for controlling the flow rate of cold water delivered by the pump may be a system in which a plurality of fixed regulating valves are provided and switched in conjunction with the selection switch as in this embodiment, or a variable regulating valve is provided and switched in conjunction with the selection switch. It is also possible to adopt a system in which the degree of throttling of this valve is changed in conjunction with each other.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明は下記の特長を有するもので
ある。即ち （１）　コーヒー粉末に散布する湯を湯沸槽より出湯、
するのに一旦計量槽にて冷水として正確に容積計量し、
これを流量調整弁により制御された流量で湯沸槽の底部
へ送り込むことにより前記冷水と！きかえる形で湯沸槽
の上部から適温の正確な量の湯水を取り出し抽出器内の
コーヒー粉末等へ所定の散湯時間にて散布することがで
きるため常に最良の味と香りのコーヒー液等を得ること
ができる。As explained above, the present invention has the following features. Namely, (1) the hot water to be sprinkled on the coffee powder is drawn from the water boiling tank;
To do this, accurately measure the volume of cold water in a measuring tank,
By sending this to the bottom of the hot water tank at a flow rate controlled by a flow rate adjustment valve, the cold water and! This feature allows you to take a precise amount of hot water at the appropriate temperature from the top of the water boiler and spray it on the coffee powder, etc. in the extractor at a predetermined sprinkling time, so the coffee liquid, etc. always has the best taste and aroma. can be obtained.

（２１計量槽における冷水計量は容積計量で給水圧力の
影響を受けず正確で、また冷水計量以後の行程は水道等
の水源より絶縁されているため湯沸槽よりの出湯につい
ては水道等の給水圧力の変動の影響を受けず、正確な量
の湯水を所定の出湯時間にて散布することができる。(21) The measurement of cold water in the measuring tank is volumetric and is accurate as it is not affected by the water supply pressure, and since the process after cold water measurement is insulated from the water source such as tap water, the hot water from the water boiling tank is not affected by water supply pressure. It is not affected by pressure fluctuations and can spray an accurate amount of hot water in a predetermined hot water supply time.

（３）計量槽から湯沸槽への給水はポンプを使用してお
り、ポンプの吐出圧は流量が決ると一定となるので、給
湯流量は流量調整弁の調整によりコーヒー液等の抽出量
に応じた最適の流ｉ［設定して一定に保たれるので、常
に最適の抽出時間で抽出ができ抽出量の多少にかかわら
ず最良の品質のコーヒー液等を得ることができる。(3) A pump is used to supply water from the metering tank to the hot water tank, and the discharge pressure of the pump remains constant once the flow rate is determined, so the flow rate of hot water supply can be adjusted to the amount of coffee liquid, etc. extracted by adjusting the flow rate adjustment valve. Since the optimal flow rate is set and kept constant, extraction can always be performed at the optimal extraction time, and coffee liquid, etc. of the best quality can be obtained regardless of the amount of extraction.

（４）待機時に湯沸槽内での湯沸しによる湯の昇温体積
膨張分は計量槽に吸収されかつ、計量槽は（１９） 計量すべき量より成程度少い冷水を予備計量して待機し
抽出操作時に所定計量値までの不足分を追加計量する方
式となっているので、湯の体積膨張吸収分は追加計量分
の一部に充当されることになり冷水計量値に全く影響を
及ぼさず、また抽出操作をしてから給湯を開始するまで
の時間も短かくすむ利点がある。(4) During standby, the heating and volumetric expansion of hot water due to boiling in the hot water tank is absorbed by the measuring tank, and the measuring tank (19) pre-measures cold water with a degree less than the amount to be measured and stands by. However, during the extraction operation, the amount that is insufficient to reach the predetermined measured value is additionally measured, so the volumetric expansion and absorption of the hot water is applied to part of the additional measured value, so it does not affect the cold water measured value at all. Furthermore, it has the advantage that the time from the extraction operation to the start of hot water supply can be shortened.

＋５１　Ｍ湯は計量槽において正確に計量された冷水を
ポンプで湯沸槽へ送り込み、この冷水とおきかえる形で
行なわれるので使用するポンプは従来の如く耐熱性を必
要とせず、また従来の如く高温水移送時にポンプの吸込
側に生ずる負圧により？ンプハウジング内で沸とう、発
泡し流量が大幅に変動するという欠点も解消できる。+51 M hot water is produced by pumping accurately measured cold water in a measuring tank and replacing it with this cold water, so the pump used does not need to be as heat resistant as in the past, and it does not require high temperature resistance as in the past. Due to the negative pressure generated on the suction side of the pump during water transfer? This also eliminates the drawbacks of boiling and foaming inside the pump housing, which causes large fluctuations in flow rate.

（６）　計量槽から湯沸槽への水の送り込みはポンプに
よっているので計量槽は湯沸槽と同一の高さに並べて設
けることができ、従って計量槽の容積を大きくとっても
装置の高さ寸法は低く押えられ背が低くて安定性、操作
性のよい大容量の飲料抽出装置の提供が可能となる。(6) Water is sent from the measuring tank to the water boiling tank using a pump, so the measuring tank can be installed at the same height as the water boiling tank. Therefore, even if the volume of the measuring tank is large, the height of the device will remain the same. It is possible to provide a large-capacity beverage brewing device with a low profile and good stability and operability.

（２ｏ）(2o)

【図面の簡単な説明】[Brief explanation of the drawing]

図は何れも本発明の一実施例を示し第１図は機構図、第
２図は電気配線図である。 １１・・・計量槽、１２・・・湯沸槽、１４・・・水位
検知器、１５・・・給水電磁弁、１６・・・給水管、１
７・・・ポンプ、１８．１９・・・水用電磁弁、加、２
１・・・流量１ｌ１１整弁、ツ・・・温度制御装置、５
・・・ヒータ、加・・・出湯管、３１・・・貯湯筒、３
３・・・連通電磁弁、あ・・・連通管。 出願人　東芝機械株式会社Each figure shows an embodiment of the present invention, and FIG. 1 is a mechanical diagram, and FIG. 2 is an electrical wiring diagram. 11... Measuring tank, 12... Water boiler tank, 14... Water level detector, 15... Water supply solenoid valve, 16... Water supply pipe, 1
7...Pump, 18.19...Water solenoid valve, addition, 2
1...Flow rate 1l11 valve control, 2...Temperature control device, 5
...Heater, addition...Hot water pipe, 31...Hot water storage cylinder, 3
3...Communication solenoid valve, ah...communication pipe. Applicant: Toshiba Machine Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] 水位検知器を内装した計量槽と、同計量槽へ給水源の水
を導びく給水管と、同給水管の途中に設けられ前記水位
検知器により開閉な′ＭＪ（Ｉｌｌされる給水電磁弁と
、温度制御装置で制御されるヒーターを備えた湯沸槽と
、前記計量槽から前記湯沸槽の底部へ送水するポンプと
、同ポンプに直列に接続された水用電磁弁及び流量制御
弁と、一端を前記湯沸槽の上面に接続しその中間を前記
湯沸槽上面より高くかつ他端の吐出口を下向にした出湯
管と、前記湯沸槽の上面に内部を連通して立設されかつ
その上面を外気に連通した貯湯筒と、一端を前記湯沸槽
の底面に接続し中間に連通電磁弁を設けると共に他端が
前記計量槽内で前記湯沸槽上面より高く前記出湯管の吐
出口より低い位置に開口した連通管とからなり、前記水
位検知器は前記計量槽内の水位が上位の所定レベルに達
すると前記給水電磁弁を閉じると共に前記ポンプの運転
を開始し、同水位が下位の所定レベルに低下した時停止
し且同ポンプの運転中は前記水用電磁弁を開き、前記連
通電磁弁を閉じるように構成された飲料抽出装置の給湯
装置。A measuring tank equipped with a water level detector, a water supply pipe that leads water from the water supply source to the measuring tank, and a water supply solenoid valve that is installed in the middle of the water supply pipe and is opened and closed by the water level detector. , a water boiling tank equipped with a heater controlled by a temperature control device, a pump for feeding water from the metering tank to the bottom of the water boiling tank, and a water electromagnetic valve and a flow rate control valve connected in series to the pump. , a hot water outlet pipe having one end connected to the top surface of the water boiling tank, an intermediate portion thereof being higher than the top surface of the water boiling tank, and a discharge port at the other end facing downward; a hot water storage cylinder whose top surface is connected to the outside air; one end connected to the bottom surface of the hot water tank; a communication solenoid valve provided in the middle; and a communication pipe opened at a position lower than the discharge port of the pipe, and the water level detector closes the water supply solenoid valve and starts operation of the pump when the water level in the measuring tank reaches a predetermined upper level, A hot water supply device for a beverage brewing device, which is configured to stop when the water level drops to a lower predetermined level, and to open the water solenoid valve and close the communication solenoid valve while the pump is in operation.