JP2004283563A - Dishwasher - Google Patents

Dishwasher Download PDF

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JP2004283563A
JP2004283563A JP2003420855A JP2003420855A JP2004283563A JP 2004283563 A JP2004283563 A JP 2004283563A JP 2003420855 A JP2003420855 A JP 2003420855A JP 2003420855 A JP2003420855 A JP 2003420855A JP 2004283563 A JP2004283563 A JP 2004283563A
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water
water level
washing
cleaning
lever
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JP4154324B2 (en
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Kouji Sagou
幸司 佐郷
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Toshiba Corp
Toshiba Consumer Marketing Corp
Toshiba Lifestyle Products and Services Corp
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Toshiba Corp
Toshiba Consumer Marketing Corp
Toshiba Home Appliances Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To enable a dishwasher to detect two or more water levels. <P>SOLUTION: The dishwasher includes a float chamber 14 which is connected to a washing tub, a float 15 which is disposed in the float chamber 14 and can move vertically, a lever 16 which is associated with vertical movement of the float 15 and two or more switches 18 and 19, the operation elements 18a and 19a of which are actuated to detect different water levels in different operation positions of the lever 16 and which are disposed at the upper outside of the float chamber 14, as a water level detection means by which a low water level H2 lower than a standard water level H1 can be established. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、洗浄水の節水を図った食器洗浄機に関する。   The present invention relates to a dishwasher that saves water for washing.

一般に、食器洗浄機では洗浄槽内に給水された洗浄水を、洗浄ポンプにて加圧して噴射ノズルに送り、該噴射ノズルからの噴射洗浄水により食器類を洗浄するようにしている。この場合、洗浄水は洗浄槽から洗浄ポンプ及び噴射ノズルを経て循環せられ、従って洗浄中の水位は給水時の水位より低下する。この低下した水位となると、洗浄中に洗浄ポンプが空気を吸い込むおそれが生じ、ポンプ性能の効率低下に伴い所期の洗浄効果が得られなくなる憂いを有する。   In general, in a dishwasher, washing water supplied into a washing tank is pressurized by a washing pump and sent to an injection nozzle to wash dishes with the injection washing water from the injection nozzle. In this case, the washing water is circulated from the washing tank through the washing pump and the spray nozzle, and thus the water level during the washing is lower than the water level at the time of water supply. When the water level falls, there is a risk that the cleaning pump may draw in air during the cleaning, and there is a concern that the desired cleaning effect cannot be obtained due to a decrease in efficiency of the pump performance.

しかも、洗浄水は流動的でポンプ圧力の変動、あるいは洗浄槽内の水位の変動などの要因に基づき、急に多くの空気を取り込んだりする現象が不規則に断続して生じた場合には大きな騒音の発生をも伴うこととなる。
そこで、従来では洗浄槽内の給水量(水位)及び洗浄ポンプの性能等を考慮して、上記のような空気を吸い込むおそれのない所定水位を所謂標準水位として設定し、洗浄運転を円滑に行うようにしている。
In addition, the washing water is fluid, and when the phenomenon of suddenly taking in a large amount of air occurs irregularly and intermittently due to factors such as fluctuations in the pump pressure or fluctuations in the water level in the washing tank, it is large. It also involves the generation of noise.
Therefore, in the related art, in consideration of the water supply amount (water level) in the cleaning tank and the performance of the cleaning pump, the above-described predetermined water level at which there is no fear of sucking air is set as a so-called standard water level, and the cleaning operation is performed smoothly. Like that.

しかるに、昨今では省資源や環境保全等の観点から水資源をはじめ、洗剤や電力等の節約が強く望まれており、節水を図った食器洗浄機が提案されている。
その一例を挙げると、低水位における洗浄運転を円滑に行うべく、洗浄ポンプの吐出能力を低減して洗浄水の該ポンプへの吸水量を減らし、以って上記した空気の吸い込み現象を防止するようにしている(例えば、特許文献1参照)。
特開平6−121760号公報 (第3,4頁)
However, in recent years, from the viewpoints of resource saving and environmental conservation, saving of water resources, detergents, electric power, and the like has been strongly desired, and dishwashers for saving water have been proposed.
For example, in order to smoothly perform the cleaning operation at a low water level, the discharge capacity of the cleaning pump is reduced to reduce the amount of cleaning water absorbed by the pump, thereby preventing the above-described air suction phenomenon. (For example, see Patent Document 1).
JP-A-6-121760 (pages 3 and 4)

しかしながら、低水位のもとに洗浄するに際して、空気を吸い込まない程度まで洗浄ポンプの吐出能力を落とすことは、当然のことながら洗浄性能が低下することは否めないし、これを補おうとすると水位を加増して洗浄ポンプの吐出性能を若干上げるなどせねばならず、これでは所期の節水効果を十分に得ることは難しくなる。   However, when cleaning at a low water level, it is natural that reducing the discharge capacity of the cleaning pump to such an extent that air is not sucked in would degrade the cleaning performance. To compensate for this, it is necessary to increase the water level. In addition, the discharge performance of the cleaning pump must be slightly increased, which makes it difficult to sufficiently obtain the desired water saving effect.

本発明の食器洗浄機は、食器類を収容する洗浄槽と、この洗浄槽内に設けられた噴射ノズルとを備えたものにおいて、
前記洗浄槽に連通したフロート室と、
このフロート室に上下移動可能に配置されたフロートと、
このフロートの上下動に連動するレバーと、
前記フロート室上方外部に設けられ前記レバーの異なる動作位置で操作子が動作する水位検知用の複数のスイッチと
を有する構成としたことを特徴とする。
A dishwasher according to the present invention includes a washing tank for accommodating tableware and a spray nozzle provided in the washing tank.
A float chamber communicating with the washing tank,
A float arranged in the float chamber so as to be movable up and down,
A lever linked to the vertical movement of the float,
And a plurality of switches for detecting a water level, which are provided outside the float chamber and operated by operating members at different operating positions of the lever.

斯かる構成によれば、一つのフロート及びレバーと複数のスイッチとにより複数の水位を検知することができ、しかも、フロート室上方外部に設けられた複数のスイッチによりそれぞれ水位を検知できる。   According to such a configuration, a plurality of water levels can be detected by one float and lever and a plurality of switches, and the water level can be detected by a plurality of switches provided outside the float chamber.

(第1の実施の形態)
以下、本発明の第1実施例を示す図1ないし図5を参照して説明する。
まず、図1は食器洗浄機の概略構成を示す縦断面図で、図2は図1のA−A線に沿って切断して示す要部の拡大断面図にあって、これら図面に示すように食器洗浄機の外殻を形成する筐体1は、上部枠体1aと下部枠体1bとから構成され、内部に洗浄槽2を設けている。この洗浄槽2は、図示しない食器かごに収納した食器類を出し入れ可能に収容する矩形箱状をなし、やはり図示しないが前方のみ開口していて、この開口から上記食器かごを出し入れでき、通常は該開口を開閉する蓋で覆われた構成にある。
(First Embodiment)
Hereinafter, a description will be given with reference to FIGS. 1 to 5 showing a first embodiment of the present invention.
First, FIG. 1 is a longitudinal sectional view showing a schematic configuration of a dishwasher, and FIG. 2 is an enlarged sectional view of a main part taken along line AA in FIG. A casing 1 forming an outer shell of a dishwasher includes an upper frame 1a and a lower frame 1b, and a washing tank 2 is provided inside. The washing tank 2 is formed in a rectangular box shape for accommodating tableware stored in a tableware basket (not shown) so as to be able to be taken in and out, and also not shown but opened only at the front, so that the tableware basket can be taken in and out from this opening. It is configured to be covered with a lid that opens and closes the opening.

上記洗浄槽2の内底部には、更に下方に窪んだ凹所2aが形成され、これには例えば洗浄水加熱用のヒータ3を配設するとともに、その最低部位は開口していて通水口2bを形成している。また、洗浄槽2の内底部の例えば2個所には洗浄水を上方に噴射する噴射ノズル4を回転可能に設けていて、外底部側に配設された洗浄ポンプ5と吐出管6を介して連通接続されている。この洗浄ポンプ5は、モータ7にて駆動され、該ポンプ5のケーシング5aの吐出側が前記吐出管6を経て噴射ノズル4に連なり、一方吸い込み側は吸い込み口5bに対し前記通水口2aとの間に、洗浄ポンプ5への吸水路としての通水管8が連通接続された構成としている。   In the inner bottom of the washing tank 2, a recess 2a which is further depressed downward is formed. For example, a heater 3 for heating washing water is provided in the recess 2a. Is formed. In addition, an injection nozzle 4 for injecting washing water upward is rotatably provided at, for example, two places on the inner bottom of the washing tank 2, and is provided via a washing pump 5 and a discharge pipe 6 provided on the outer bottom side. Communication is established. The cleaning pump 5 is driven by a motor 7, and the discharge side of a casing 5a of the pump 5 is connected to the injection nozzle 4 via the discharge pipe 6, while the suction side is between the suction port 5b and the water passage port 2a. In addition, a water pipe 8 as a water suction path to the cleaning pump 5 is connected to be connected.

そして、上記通水管8には吸気用の通気管9が連通接続されている。この通気管9は、その下端部を通水管8の中間部位に連通接続し、要は洗浄ポンプ5の吸い込み側に連通していて、他端たる上端部の吸気口9aは後述する標準水位より上方に位置して、本実施例では洗浄槽2の上部側壁を介して連通接続されている。斯かる構成の通気管9は、洗浄ポンプ5が駆動され通水管8中の水の流れによる負圧現象により空気が取り込まれるようにしたもので、例えば直径2ミリメートル(mm)程度の細管を採用し、且つ一度に多量の空気が吸いこまれるのを防止している。   The water pipe 8 is connected to a ventilation pipe 9 for intake. The lower end of the ventilation pipe 9 is connected to an intermediate portion of the water pipe 8, which is connected to the suction side of the washing pump 5. The suction port 9 a at the upper end, which is the other end, is higher than a standard water level described later. In the present embodiment, the cleaning tank 2 is connected to the cleaning tank 2 via the upper side wall thereof. The ventilation pipe 9 having such a configuration is such that the cleaning pump 5 is driven to take in air by a negative pressure phenomenon caused by the flow of water in the water pipe 8, and for example, a thin pipe having a diameter of about 2 mm (mm) is used. In addition, a large amount of air is prevented from being sucked in at one time.

更に、上記通水管8には、上記通気管9の連結部位と洗浄ポンプ5の吸込口5bとの間に位置して、網状あるいは格子状の細孔部材10を水の流れに面して配設している。
また、洗浄槽2の下部には図2に示すように、洗浄槽2内に洗浄水を供給すべく給水手段として、一端が機外の水道蛇口(図示せず)に接続され、他端が洗浄槽2内に連通接続された給水管11が、途中に給水弁12を介して設けられている。
Further, the water pipe 8 is provided with a mesh-like or lattice-like pore member 10 facing the flow of water, located between the connection part of the ventilation pipe 9 and the suction port 5b of the washing pump 5. Has been established.
As shown in FIG. 2, one end of a lower end of the washing tank 2 is connected to a water tap (not shown) outside the machine as a water supply means for supplying washing water into the washing tank 2, and the other end is provided. A water supply pipe 11 communicatively connected to the inside of the cleaning tank 2 is provided on the way through a water supply valve 12.

このような給水手段による給水量を複数段階(本実施例では2段階)に制御すべく、給水制御装置13を洗浄槽2と連通状態に設けている。
以下、この給水制御装置13につき、その具体構成を示す図3も参照して説明すると、これは洗浄槽2の下部である凹所2a(或は通水管8でも可)に連通したフロート室14を設け、その内部に配したフロート15のフロート軸15aを上方外部に突出させ、この突出した端部にレバー16の一方の腕部16aが連結されている。上記フロート15は水に浮くものであり、従ってフロート室14内を上下移動可能である。前記レバー16は、固定板17に回動可能に軸支され、その他方に延出した腕部16bは複数のスイッチであるマイクロスイッチ18,19の各操作子18a,19aと接離可能に配設された構成としている。このマイクロスイッチ18,19は図3から分かるようにフロート室14の上方外部に位置する。
In order to control the amount of water supplied by such a water supply means in a plurality of stages (two stages in this embodiment), a water supply control device 13 is provided in communication with the washing tank 2.
Hereinafter, the water supply control device 13 will be described with reference to FIG. 3 showing a specific configuration thereof. The water supply control device 13 includes a float chamber 14 communicating with a recess 2 a (or a water pipe 8) at a lower portion of the washing tank 2. And a float shaft 15a of the float 15 disposed therein is protruded upward and outward. One arm 16a of the lever 16 is connected to the protruding end. The float 15 floats on water, and therefore can move up and down in the float chamber 14. The lever 16 is rotatably supported by a fixed plate 17, and an arm 16 b extending to the other side is disposed so as to be able to contact and separate from respective operators 18 a and 19 a of microswitches 18 and 19 which are a plurality of switches. It is configured to be installed. These micro switches 18 and 19 are located outside the upper part of the float chamber 14 as can be seen from FIG.

尚、このマイクロスイッチ18と19は、適宜離間して前記腕部16bの回動軌跡の範疇に位置して前記固定板17に取り付けられ、そのうちの一方のマイクロスイッチ18は開放型(ノーマルオープン)のスイッチ構成で、所謂操作子18aが内方に押圧された状態では断電し、解放されて外方に突出すると通電回路が形成される。これに対し、他方のマイクロスイッチ19は、逆に閉成型(ノーマルクローズ)のスイッチ構成で、操作子19aが内方に押圧された状態で通電回路が形成されるもので、このような通電回路には前記給水弁12を開閉する制御回路も含まれる。   The microswitches 18 and 19 are appropriately separated from each other and are attached to the fixed plate 17 in the category of the rotation locus of the arm portion 16b. One of the microswitches 18 is an open type (normally open). When the so-called operation element 18a is pressed inward, the power is cut off, and when the switch 18a is released and protrudes outward, an energizing circuit is formed. On the other hand, the other microswitch 19 has a switch configuration of a closed molding (normally closed), in which an energizing circuit is formed in a state where the operation element 19a is pressed inward. Includes a control circuit for opening and closing the water supply valve 12.

従って、レバー16の腕部16bがどちらの操作子18a,19aにも圧接しないで中間の離間した位置にある場合には、操作子18aが解放された状態にあるからマイクロスイッチ18による通電回路が形成されることになる。
また、図示右側のマイクロスイッチ19は、空気を吸い込むことなく通常の洗浄運転が円滑にできる所定の給水量を制御すべく、所謂標準水位(図2中に二点鎖線H1で示す)を制御するための水位センサとしての検知機能を有するもので、これに対しもう一方のマイクロスイッチ18は、この標準水位H1より低い低水位(図2中に実線H2で示す)を制御する水位センサとしての検知機能を有している。従って、マイクロスイッチ18,19は水位検知用のスイッチである。
Therefore, when the arm 16b of the lever 16 is located at an intermediate distance without being pressed against either of the operation elements 18a and 19a, the energization circuit by the microswitch 18 is not provided since the operation element 18a is released. Will be formed.
Further, the micro switch 19 on the right side in the figure controls a so-called standard water level (shown by a two-dot chain line H1 in FIG. 2) in order to control a predetermined water supply amount that allows a normal cleaning operation to be performed smoothly without sucking air. The other microswitch 18 has a detection function as a water level sensor for controlling a low water level (shown by a solid line H2 in FIG. 2) lower than the standard water level H1. Has a function. Therefore, the micro switches 18 and 19 are switches for detecting the water level.

ところで、筐体1の図示しない前面には、図4に示す操作パネル20が設けられ、これには各種の操作キーが設けられ、概述すると食器洗浄機の電源スイッチキー21、スタートスイッチキー22、運転コース選択キー23、及び表示部24等を備え、そのうち運転コース選択キー23では、例えば押圧操作するごとに一般的な「標準」コース、洗浄ポンプ5の圧力アップした「強力」コース、水量や洗剤を少量とした「節約」コース等を切換え選択できるようにしている。   By the way, an operation panel 20 shown in FIG. 4 is provided on a front surface (not shown) of the housing 1, and various operation keys are provided. In general, a power switch key 21, a start switch key 22, and a start switch key 22 of the dishwasher are provided. An operation course selection key 23, a display unit 24, and the like are provided. The operation course selection key 23 includes, for example, a general "standard" course, a "strong" course in which the pressure of the washing pump 5 is increased, a water amount, A "saving" course with a small amount of detergent can be switched and selected.

因みに図5には、「標準」コースと「節約」コースとの使用水量の一例を示しており、これは洗浄水を使用する「洗い」行程及び3回の「すすぎ」行程を通して必要とする使用水量を示している。従って、この実施例では「節約」コースにおける使用水量は、「標準」コースに対して合計で約2リットル(l)の節水が可能であり、且つ該「節約」コースでの洗剤使用量も図示しないが例えば半減した洗剤投入量としている。但し、洗浄ポンプ5のポンプ圧力は同じ能力で行うとともに、この「節約」コースにおける低水位制御は、前記した給水制御装置13のマイクロスイッチ18が有効化されて水位制御される(詳細は後述する)。   Incidentally, FIG. 5 shows an example of the amount of water used in the “standard” course and the “conserving” course, which are used during the “washing” step using washing water and the three “rinsing” steps. Shows the amount of water. Therefore, in this embodiment, the amount of water used in the “conserving” course can save about 2 liters (l) in total with respect to the “standard” course, and the amount of detergent used in the “conserving” course is also shown. However, the amount of detergent input is reduced by half, for example. However, the pump pressure of the washing pump 5 is performed with the same capacity, and the low water level control in this “saving” course is controlled by enabling the micro switch 18 of the water supply control device 13 described above (details will be described later). ).

このような、上記操作パネル20による操作入力や給水制御装置13からの検知信号等に基づき、図示しない制御装置により食器洗浄機の運転全般が制御される。
また、図示しないが通常食器洗浄機には、洗浄水を排水する手段としての排水用ポンプや、食器類の乾燥を行うべく外気を導入し加熱温風化する乾燥機構も備えている。
次に、上記構成とした食器洗浄機の洗浄作用について説明する。
The overall operation of the dishwasher is controlled by a control device (not shown) based on the operation input from the operation panel 20, the detection signal from the water supply control device 13, and the like.
Further, although not shown, the normal dishwasher is provided with a drainage pump as a means for draining the washing water, and a drying mechanism for introducing outside air to heat the tableware and to heat and warm the dishes.
Next, the cleaning operation of the dishwasher configured as described above will be described.

まず、運転コース選択キー23の操作により通常に利用する「標準」コースを選択設定した場合は、スタートスイッチキー22の操作にて運転スタートし、給水弁12から水道水が洗浄槽2内に供給される。この場合の給水量は、図2中に示した標準水位H1であることから、その給水過程で低水位H2で動作するマイクロスイッチ18は実質的に無効化されていて、給水弁12を閉塞する動作制御はされない。   First, when the "standard" course to be used normally is selected and set by operating the operation course selection key 23, the operation is started by operating the start switch key 22, and tap water is supplied from the water supply valve 12 into the washing tank 2. Is done. Since the water supply amount in this case is the standard water level H1 shown in FIG. 2, the microswitch 18 operating at the low water level H2 in the water supply process is substantially disabled, and closes the water supply valve 12. No operation control is performed.

しかして、所定水位たる標準水位H1に達すると、フロート15の上昇浮動(上方への移動)に応じてレバー16が回動し(動作し)マイクロスイッチ19の操作子19aがレバー16の腕部16bに押圧され、所定の水位に達したことを検知するとともに、通電回路が形成されて給水弁12を閉塞して給水動作を停止する一方、洗浄ポンプ5を駆動して「洗い」行程が実行される。即ち、洗浄ポンプ5にて加圧された洗浄水は、吐出管6から2個所の噴射ノズル4に分岐されて圧送される。   When the water level reaches the standard water level H1, which is the predetermined water level, the lever 16 rotates (operates) in accordance with the rising and floating (upward movement) of the float 15, and the operator 19a of the micro switch 19 is moved to the arm portion of the lever 16. 16b, it is detected that the water level has reached a predetermined level, and an energizing circuit is formed to close the water supply valve 12 to stop the water supply operation, while the cleaning pump 5 is driven to execute the "washing" step. Is done. That is, the cleaning water pressurized by the cleaning pump 5 is branched from the discharge pipe 6 to two injection nozzles 4 and fed under pressure.

噴射ノズル4は、圧送された洗浄水を上方に噴射し、且つその噴射反動により自ら回転しながら図示しない食器類をむらなく洗浄する。また、洗浄水はヒータ3にて加熱され所定温度に制御される。尚、洗剤は例えば予め洗浄槽2内の所定部位に供給しておき、これを給水または噴射洗浄水にて洗い流すようにして投入される。
このような洗浄運転(後段のすすぎも同様である)において、運転中の水位は変動して給水時の設定された標準水位H1より低下するが、十分な水頭もあることから、洗浄水は空気を吸い込むことなく洗浄槽2の凹所2a及び通水管8を経て洗浄ポンプ5に流入する。また、同様に通水管8に接続された通気管9からも空気が導入されるには至らない。以降、詳細な説明は省略するが上記同様の洗浄態様にて後続の「すすぎ」行程が実行され、更に図示しない「乾燥」行程が実行され、食器類の洗浄及び乾燥が行われる。
The spray nozzle 4 sprays the flushed cleaning water upward, and evenly cleans the dishes (not shown) while rotating by the reaction of the spray water. Further, the cleaning water is heated by the heater 3 and controlled to a predetermined temperature. The detergent is supplied to a predetermined portion in the cleaning tank 2 in advance, for example, and is supplied so as to be flushed with water or jet cleaning water.
In such a washing operation (the same applies to the subsequent rinsing), the water level during the operation fluctuates and falls below the standard water level H1 set at the time of water supply, but since there is a sufficient head, the washing water is air. Flows into the cleaning pump 5 through the recess 2a of the cleaning tank 2 and the water pipe 8 without being sucked. Similarly, air is not introduced from the ventilation pipe 9 connected to the water pipe 8. Hereinafter, although a detailed description is omitted, a subsequent “rinsing” step is executed in the same manner as described above, and a “drying” step (not shown) is executed to wash and dry tableware.

これに対し、「節約」コースを選択設定した場合には、以下特に「標準」コースと異なる点を中心に説明すると、例えば図4のキー操作に伴ない操作パネル20に「洗剤半分」の点灯表示がなされ、使用者は予め通常の半分の洗剤を所定部位に用意しておく。そして、洗浄水としての水道水の給水制御は、この場合はマイクロスイッチ18の動作が有効化されていて、給水量が低水位H2に達すると、フロート15の浮動(上方への移動)に基づきレバー16が回動して、その腕部16bがマイクロスイッチ18の操作子18aを押圧状態から解放する。これにより、低水位H2が検知され、給水弁12は閉塞されて給水は停止されるとともに、洗浄ポンプ5等を駆動する通電回路が形成されて、上記同様の噴射ノズル4による洗浄運転が実行される。   On the other hand, when the "saving" course is selected and set, the following description will focus on the points different from the "standard" course, for example. For example, the operation panel 20 shown in FIG. The display is made, and the user prepares half of the usual detergent at a predetermined site in advance. In this case, the water supply control of the tap water as the washing water is based on the floating (moving upward) of the float 15 when the operation of the microswitch 18 is enabled and the water supply amount reaches the low water level H2. The lever 16 rotates, and the arm 16b releases the operator 18a of the microswitch 18 from the pressed state. Thereby, the low water level H2 is detected, the water supply valve 12 is closed and the water supply is stopped, and an energizing circuit for driving the cleaning pump 5 and the like is formed, and the cleaning operation by the injection nozzle 4 similar to the above is performed. You.

ところが、斯かる運転中において、洗浄槽2内の水位は低いため十分な水頭が得られず、そのため図2中の凹所2a内では一点鎖線H3で示すように、全体に水位が低下し中央部分では水が渦巻状に吸引されるように流れ、このとき同時に中心部分から空気が取り込まれることになる。しかるに、この洗浄中の水位は、洗浄水が噴射されるなどして循環利用のため変動し易く、このため空気の取り込みも断続的に行われ且つ不規則となる。   However, during such an operation, the water level in the washing tank 2 is low, so that a sufficient head cannot be obtained. Therefore, as shown by the one-dot chain line H3 in the recess 2a in FIG. In the portion, water flows so as to be sucked in a spiral shape, and at the same time, air is taken in from the central portion. However, the water level during this washing is liable to fluctuate due to circulation use, for example, when the washing water is jetted, so that air is taken in intermittently and irregularly.

しかも、このように水中に吸引された空気の気泡が大きい場合には、洗浄ポンプ5の効率が低下し洗浄効果も低下することが懸念され、且つ大きな騒音を生ずる要因ともなる。
しかしながら、本実施例では洗浄ポンプ5への吸水路たる通水管8には、細い通気管9が連通接続され、所謂洗浄ポンプ5の吸入側に連通しているので、水位が低い場合には通水管8を流れる洗浄水に吸引されて空気が定常的に取り込まれる。
In addition, when the air bubbles sucked into the water are large, there is a concern that the efficiency of the cleaning pump 5 is reduced and the cleaning effect is also reduced, and this is also a factor of generating large noise.
However, in this embodiment, a thin ventilation pipe 9 is connected to the water pipe 8 serving as a water suction path to the washing pump 5 and communicates with the so-called suction side of the washing pump 5. The water is sucked into the washing water flowing through the water pipe 8 and air is constantly taken in.

これにより、洗浄ポンプ5への吸水側の圧力変動が安定して小さくなる傾向となり、洗浄槽2の凹所2a側から通水管8に一度に多量の空気が吸い込まれる現象は抑制され安定する。しかも、仮に大きな気泡となって通水管8に流入しても、洗浄ポンプ5に至る間に細孔部材10が介在されているので、当該気泡は細孔部材10にて細かく一様に分散される。   Thereby, the pressure fluctuation on the water suction side to the cleaning pump 5 tends to be stably reduced, and the phenomenon that a large amount of air is sucked into the water pipe 8 from the recess 2a side of the cleaning tank 2 at a time is suppressed and stabilized. Moreover, even if large bubbles flow into the water pipe 8, the pores 10 are interposed between the cleaning pump 5 and the bubbles are finely and uniformly dispersed in the pores 10. You.

従って、斯かる洗浄運転中には、通気管9及び細孔部材10の機能により空気は定常的に取り込まれ、また一度に多量の空気の取り込みは低減できるものの、仮に大きな気泡を生じても一様に細かく分散されて洗浄ポンプ5に流入し、しかる後、加圧されて噴射ノズル4より噴射される。このように、空気は細かく分散され水も整流作用を受けることから、所謂ポンプ効率の低下や大きな騒音の発生を有効に抑えることができ、しかも細かな気泡が食器類に衝突して砕ける際の超音波作用も得られるなどして効果的な洗浄作用が期待できる。   Therefore, during such a cleaning operation, air is steadily taken in by the functions of the ventilation pipe 9 and the pore member 10, and although a large amount of air can be reduced at one time, even if large bubbles are generated, it is still one time. The water is then finely dispersed and flows into the cleaning pump 5, after which it is pressurized and jetted from the jet nozzle 4. As described above, since the air is finely dispersed and the water is also subjected to the rectifying action, it is possible to effectively suppress the so-called reduction in pump efficiency and the generation of loud noise, and when fine bubbles collide with tableware and break. An effective cleaning action can be expected, for example, by obtaining an ultrasonic action.

斯くして、従来では通常の標準水位より低い水位による洗浄運転が円滑にできなかったが、本実施例によれば空気の吸い込みを許容しながら、その不具合を回避しつつ節水を図った洗浄運転が支障なく実施できる。また、この「節約」コースでは、図5に一例を開示したように節水できること以外に、この水量減少に伴い洗剤量の節約やヒータ3による温水化のための消費電力等も節約できる。   Thus, conventionally, the washing operation at a water level lower than the normal standard water level could not be performed smoothly, but according to the present embodiment, the washing operation is performed while saving the water while allowing the suction of air while avoiding the problem. Can be implemented without any problems. In addition, in this “conservation” course, in addition to water saving as disclosed in an example in FIG. 5, it is also possible to save the amount of detergent and the power consumption for warming water by the heater 3 with the decrease in the amount of water.

以上説明したように、本実施例によれば次の効果を有する。
洗浄槽2に連通するフロート室14を設けると共に、このフロート室14にフロート15を上下移動可能に設け、このフロート15の上下移動に連動するレバー16を設け、このレバー16の動作に基づいて水位を検知する二つのマイクロスイッチ18,19を設ける構成とした。これにより、一つのフロート15とレバー16と二つのマイクロスイッチ18,19により複数の水位(標準水位H1と低水位H2と)を検知することができる。しかも、フロート室14上方に設けられた複数のスイッチ18,19により水位を検知できる。
As described above, the present embodiment has the following effects.
A float chamber 14 communicating with the washing tank 2 is provided, and a float 15 is provided in the float chamber 14 so as to be movable up and down, and a lever 16 is provided in conjunction with the up and down movement of the float 15. Is provided with two micro switches 18 and 19 for detecting the pressure. Thus, a plurality of water levels (a standard water level H1 and a low water level H2) can be detected by one float 15, the lever 16, and the two microswitches 18 and 19. In addition, the water level can be detected by a plurality of switches 18 and 19 provided above the float chamber 14.

また、マイクロスイッチ19は、操作子19aが前記レバー16により押圧された状態から該レバー16の動作に応じて押圧解放されることにより水位を検知する形態であり、マイクロスイッチ18は、その操作子18aが押圧解除状態から該レバー16の動作に応じて押圧されることにより水位を検知する形態であるから、レバー16がマイクロスイッチ19から離れる方向に動作するときに低水位H2を検知でき、また、レバー16がマイクロスイッチ18に接近する方向に動作するときに標準水位H1を検知できる。   The micro switch 19 is configured to detect a water level by being released from the state in which the operating element 19a is pressed by the lever 16 in accordance with the operation of the lever 16, and the micro switch 18 is configured to operate the operating element 19a. Since the water level is detected by pressing the lever 18a in response to the operation of the lever 16 from the depressed state, the low water level H2 can be detected when the lever 16 moves away from the microswitch 19, and The standard water level H1 can be detected when the lever 16 operates in the direction approaching the microswitch 18.

洗浄運転時において、洗浄ポンプ5の駆動に伴い水中に空気が取り込まれるおそれがある低水位H2に対し、通気管9から定常的に安定して空気を吸い込むようにし、これにより洗浄槽2の凹所2a側からの断続的で一度に多量の空気を取り込む不規則な現象を抑え得るとともに、仮に大きな気泡が生じたとしても、洗浄ポンプ5に至る前段で細孔部材10により細かく分散されるようにした。   During the cleaning operation, air is constantly and stably sucked from the ventilation pipe 9 against the low water level H2 at which air may be taken into the water as the cleaning pump 5 is driven. It is possible to suppress intermittent and irregular phenomena of taking in a large amount of air at once from the place 2a side, and even if large bubbles are generated, they are finely dispersed by the pore members 10 in the stage before reaching the cleaning pump 5. I made it.

この結果、水流は整流作用を受けて安定することも相俟って大きな気泡や乱流によるポンプ効率の低下を極力抑え得、しかも細かい空気粒が噴射され食器類に衝突して砕ける際の超音波効果も期待できて、良好な洗浄効果が期待できる。
加えて、従来のようにポンプ圧力を低減することなく円滑に洗浄運転ができ、節水及び節洗剤、更には節電効果等を期待できるとともに、不規則で多量の空気を吸い込んだときの大きな騒音の発生を抑えるにも有効である。
As a result, combined with the fact that the water flow is stabilized by the rectifying action, the decrease in pump efficiency due to large bubbles and turbulent flow can be suppressed as much as possible. A sonic effect can be expected, and a good cleaning effect can be expected.
In addition, the washing operation can be performed smoothly without reducing the pump pressure as in the past, and water and detergent savings, as well as power saving effects, can be expected. It is also effective in suppressing the occurrence.

尚、本実施例では操作パネル20にて「節約」コースの選択により、低水位H2による運転コースが予め設定されているとして述べたが、これに代えて例えば「低水位」設定を専用とする操作キーを設けて、これを「標準」コースに組み合わせて実行するようにしても良い。また、通気管9の上端部の吸気口9aは洗浄槽2の上部に連通して設けたが、これは「乾燥」行程時に蒸気が該通気管9から筐体1内に放出されるのを防止するためで、従ってこれに限定されることなく要は通気管9の吸気口9aが標準水位H1より高位置に開口するようにしても良い。その他、吸気口9aを筐体1外に連通する構成としても良い。   In the present embodiment, the operation course using the low water level H2 is set in advance by selecting the "saving" course on the operation panel 20, but instead, for example, the "low water level" setting is dedicated. An operation key may be provided, and this may be executed in combination with the “standard” course. In addition, the intake port 9a at the upper end of the ventilation pipe 9 is provided so as to communicate with the upper part of the washing tank 2, which prevents the steam from being released from the ventilation pipe 9 into the housing 1 during the "drying" process. In order to prevent this, the intake port 9a of the ventilation pipe 9 may be opened at a position higher than the standard water level H1. In addition, a configuration in which the intake port 9a communicates with the outside of the housing 1 may be adopted.

その他、洗剤の投入手段としても上記した手動操作以外に、例えば「低水位」設定に応じて自動的に洗剤量が調整され投入可能とする洗剤投入機を採用しても良いし、あるいは、この低水位による洗浄運転の用途として、軽微な汚れに対する洗浄手段に用いたり予洗い手段として採用しても良いなど、実施に際して種々変更可能である。
(第2の実施の形態)
上記実施例に対し、図6は本発明の第2実施例を示す図1相当図で、上記第1実施例と同一部分には同一符号を付して説明を省略し、異なる部分についてのみ説明する。
In addition, besides the manual operation described above also as a detergent charging means, for example, a detergent dispensing machine that automatically adjusts the detergent amount according to the `` low water level '' setting and may be capable of dispensing may be adopted, or Various uses can be made in the implementation of the cleaning operation using the low water level, such as using as a cleaning means for small stains or adopting as a pre-washing means.
(Second embodiment)
FIG. 6 is a view corresponding to FIG. 1 showing a second embodiment of the present invention, in which the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Only different parts will be described. I do.

このものは、空気の取り込みを更に安定化したもので、即ち通気管9の上端部の吸気口9aにエアポンプ25を装備し、該通気管9から一定量の空気を送り込むようにしたものである。
これは、空気の取り込み態様が上記第1実施例にあっても、洗浄水の循環等による水位変動や圧力変動が低減されるも若干ではあるが影響を受けるのに対し、本実施例によれば低水位H2における洗浄運転中、エアポンプ24を駆動することでほぼ一定量の空気を通水管8に確実に送り込むことができる。
This is one in which the intake of air is further stabilized, that is, an air pump 25 is provided at an intake port 9a at the upper end of the ventilation pipe 9 so that a certain amount of air is sent from the ventilation pipe 9. .
This is because although the air intake mode is in the first embodiment, the water level fluctuation and the pressure fluctuation due to the circulation of the washing water and the like are reduced but slightly affected. For example, during the cleaning operation at the low water level H2, by driving the air pump 24, a substantially constant amount of air can be reliably sent to the water pipe 8.

従って、定常的に一様な空気を確実に取り込むことができ、上記第1実施例の作用効果に加え、安定した水の流れのもとに洗浄ポンプ5によるポンプ圧力も一層安定して、円滑な洗浄運転が可能となり、良好な洗浄作用及び騒音の低減効果が期待できる。
尚、本発明は上記し且つ図面に示した各実施例にのみ限定されるものではなく、本発明の要旨を逸脱しない範囲内で種々変更して実施し得る。
Therefore, it is possible to reliably take in uniform air constantly, and in addition to the operation and effect of the first embodiment, the pump pressure by the cleaning pump 5 is further stabilized under a stable flow of water, so that it is smooth. It is possible to perform a good cleaning operation, and a good cleaning action and a noise reduction effect can be expected.
It should be noted that the present invention is not limited to the embodiments described above and shown in the drawings, and can be implemented with various modifications without departing from the gist of the present invention.

本発明の第1実施例における全体構成の概略を示す縦断面図1 is a longitudinal sectional view schematically showing an overall configuration according to a first embodiment of the present invention. 図1のA−A線に沿って切断して示す拡大断面図FIG. 2 is an enlarged sectional view taken along line AA of FIG. 1. 給水制御装置の構成図Configuration diagram of water supply control device 操作パネルの正面図Front view of operation panel 運転コースと給水量との関係を示す図Diagram showing the relationship between driving course and water supply 本発明の第2実施例を示す図1相当図FIG. 1 corresponding to FIG. 1 showing a second embodiment of the present invention.

符号の説明Explanation of reference numerals

2は洗浄槽、4は噴射ノズル、5は洗浄ポンプ、8は通水管(吸水路)、9は通気管、9aは吸気口、10は細孔部材、12は給水弁、13は給水制御装置、23は運転コース選択キー、及び25はエアポンプを示す。

2 is a washing tank, 4 is an injection nozzle, 5 is a washing pump, 8 is a water pipe (water suction passage), 9 is a vent pipe, 9a is an intake port, 10 is a pore member, 12 is a water supply valve, and 13 is a water supply control device. , 23 indicate an operation course selection key, and 25 indicates an air pump.

Claims (2)

食器類を収容する洗浄槽と、この洗浄槽内に設けられた噴射ノズルとを備えたものにおいて、
前記洗浄槽に連通したフロート室と、
このフロート室に上下移動可能に配置されたフロートと、
このフロートの上下動に連動するレバーと、
前記フロート室上方外部に設けられ前記レバーの異なる動作位置で操作子が動作する水位検知用の複数のスイッチと
を有する構成としたことを特徴とする食器洗浄機。
In a washing tank containing tableware and a spray nozzle provided in the washing tank,
A float chamber communicating with the washing tank,
A float arranged in the float chamber so as to be movable up and down,
A lever linked to the vertical movement of the float,
And a plurality of switches for detecting a water level, which are provided at an upper outside of the float chamber and at which different operating positions of the lever are operated by operating elements.
複数のスイッチとして、操作子がレバーにより押圧された状態から押圧解放されることにより水位を検知するスイッチと、操作子がレバーにより押圧解除状態から押圧されることにより水位を検知するスイッチとが設けられていることを特徴とする請求項1記載の食器洗浄機。

As the plurality of switches, a switch that detects a water level when the operator is released from a state pressed by the lever and a switch that detects a water level when the operator is pressed from the released state by the lever are provided. The dishwasher according to claim 1, wherein the dishwasher is used.

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CN100431468C (en) * 2004-11-26 2008-11-12 乐金电子(天津)电器有限公司 Air brake of bowl washer
CN100413452C (en) * 2005-06-23 2008-08-27 乐金电子(天津)电器有限公司 Air brake structure of dish washer
KR100910803B1 (en) 2007-09-04 2009-08-04 엘지전자 주식회사 Water level sensing apparatus of dish washer
JP2010194016A (en) * 2009-02-24 2010-09-09 Panasonic Corp Dishwasher
CN103982410A (en) * 2014-06-02 2014-08-13 湖南科技学院 Air pump air pressure automatic controller
CN106073677A (en) * 2016-07-29 2016-11-09 芜湖广盈实业有限公司 A kind of dish-washing machine level control switch for water

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