JPH09141251A - Detector for water level of water purifier - Google Patents
Detector for water level of water purifierInfo
- Publication number
- JPH09141251A JPH09141251A JP8278214A JP27821496A JPH09141251A JP H09141251 A JPH09141251 A JP H09141251A JP 8278214 A JP8278214 A JP 8278214A JP 27821496 A JP27821496 A JP 27821496A JP H09141251 A JPH09141251 A JP H09141251A
- Authority
- JP
- Japan
- Prior art keywords
- water
- water level
- voltage
- level sensing
- square wave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/42—Liquid level
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Filtration Of Liquid (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、水道水等の源水に
含まれた有害汚染物質を除去して浄水を行う冷温浄水器
に係り、より詳しくは、浄水量を感知する水位感知装置
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cold / hot water purifier for removing harmful pollutants contained in source water such as tap water to purify water, and more particularly to a water level sensing device for sensing the amount of purified water. .
【０００２】[0002]
【従来の技術】従来、一般に使われているこの種の浄水
器は、水道水等の源水に含まれた有害発癌物質を除去し
た浄水を供給するものであって、その浄水のし方により
自然濾過式、直結濾過式、イオン交換樹脂式および逆浸
透圧式などに大別される。前記浄水方式のうち、とりわ
け、逆浸透圧式は源水に所定圧を加えて人工的な浸透膜
のメンブレン（逆浸透膜）を通させて浄水を行うもので
あって、源水に含有されている重金属、バクテリア、発
癌物質等を分離除去するとともに、純粋水と溶存酸素等
だけが通過された清浄水が供給できるため、最先端科学
産業や超精密電子部品の洗浄用または医療用に使われて
おり、最近では飲用水のための家庭向けの浄水器にも汎
用されている。2. Description of the Related Art Conventionally, this type of water purifier generally used supplies purified water from which harmful carcinogens contained in source water such as tap water have been removed. It is roughly classified into a natural filtration type, a direct coupling type, an ion exchange resin type and a reverse osmosis type. Among the above-mentioned water purification methods, the reverse osmosis pressure method is a method of performing a water purification by applying a predetermined pressure to the source water and passing it through an artificial osmosis membrane (reverse osmosis membrane). Since it can separate and remove heavy metals, bacteria, carcinogens, etc. that exist, and can supply clean water that has passed only pure water and dissolved oxygen, it is used for cutting-edge scientific industries and for the cleaning of ultra-precision electronic parts or medical applications. Recently, it has been widely used in household water purifiers for drinking water.
【０００３】かような従来の逆浸透式浄水器は、水道栓
１に連結されたアダップター２を通して給水管３内に供
給される水道水等の源水は本体４の背面側に設けられた
先処理フィルタ５を通りつつ監素成分等の各種の有害有
機化合物質が除去され、前記先処理フィルタ５を通過さ
れた源水は図示のない給水弁により給水量が調整される
とともに、加圧ポンプの駆動により所定圧に昇圧されて
メンブレン６に流入される。この際、前記メンブレン６
に流入された源水はメンブレン６内の図示のない複数の
メンブレン膜を透過しつつ源水に含有された各種の重金
属、バクテリア、発癌物質等の細菌が除去され、前記メ
ンブレン６を通された源水は再度後処理フィルタ７を通
りつつ有毒ガス等の臭いが除去される。In such a conventional reverse osmosis water purifier, the source water such as tap water supplied into the water supply pipe 3 through the adapter 2 connected to the water tap 1 is provided at the rear side of the main body 4. Various harmful organic compounds such as monitoring components are removed while passing through the treatment filter 5, and the amount of the source water that has passed through the pretreatment filter 5 is adjusted by a water supply valve (not shown) and a pressurizing pump is also used. Is driven to increase the pressure to a predetermined pressure and flow into the membrane 6. At this time, the membrane 6
The source water that has flowed into the membrane 6 passes through a plurality of membrane membranes (not shown) in the membrane 6 while various heavy metals, bacteria, carcinogens, and other bacteria contained in the source water are removed, and the source water is passed through the membrane 6. The source water passes through the post-treatment filter 7 again, and the odor of toxic gas or the like is removed.
【０００４】前記後処理フィルタ７を通りつつ有毒ガス
等が除臭されて水味の良好な浄水は給水穴８を通り浄水
タンク９内に供給される。前記浄水タンク９に浄水が供
給されると、浄水タンク９に供給される浄水量が満水位
（浄水タンクに供給される浄水を遮断するための最大浄
水量）か、または渇水位（浄水タンクに浄水を供給開始
するための最小浄水量）かを水位センサで感知する。While passing through the post-processing filter 7, detoxified toxic gases and the like and purified water having a good taste are supplied into the water purification tank 9 through the water supply hole 8. When the purified water is supplied to the purified water tank 9, the purified water amount supplied to the purified water tank 9 is at a full level (the maximum purified water amount for shutting off the purified water supplied to the purified water tank) or a drought level (to the purified water tank). The water level sensor detects whether it is the minimum amount of purified water required to start supplying purified water.
【０００５】前記浄水タンクに供給された浄水量が満水
位のときには浄水タンク９内への浄水の供給を遮断し、
浄水タンク９に供給された浄水量が渇水位のときには浄
水タンク９内に浄水が供給されるようにして浄水タンク
９内に常時所定量の浄水が貯蔵されるようにする。さら
に、前記浄水タンク９内の貯蔵浄水は取水レバー１０の
作動にしたがって取水口１１を通り排出されるとともに
取水が可能となる。When the amount of purified water supplied to the purified water tank is full, the supply of purified water into the purified water tank 9 is cut off,
When the amount of purified water supplied to the purified water tank 9 is at a drought level, purified water is supplied into the purified water tank 9 so that a predetermined amount of purified water is always stored in the purified water tank 9. Further, the stored purified water in the purified water tank 9 is discharged through the water intake 11 according to the operation of the water intake lever 10, and the water can be taken in.
【０００６】かような従来の浄水器において、浄水タン
ク９に供給された浄水量を感知する水位感知回路は図２
のごとしである。図２のごとく、電源部１５から出力さ
れる直流電圧が水位センサ１６の感知電極１６ａに印加
され、浄水タンク９に供給された浄水が前記水位センサ
１６の他の感知電極１６ｂに接触すると、水により水位
センサ１６の抵抗値が分圧抵抗Ｒ１により分圧されてバ
ッファ１７を通して水位センサ１６の出力電圧（Ｃ点の
電位）が制御部１８の入力端子Ａ／Ｄに入力される。し
たがって、前記制御部で１８は入力端子Ａ／Ｄを通して
入力される水位センサ１６の出力電圧を既設定された基
準電圧と比較して前記浄水タンク９に供給された浄水量
が満水位か、または渇水位かを判断しつつ浄水タンク９
に所定量の浄水が貯蔵されるように制御する。In such a conventional water purifier, the water level sensing circuit for sensing the amount of purified water supplied to the water purification tank 9 is shown in FIG.
It is a good thing. As shown in FIG. 2, when the DC voltage output from the power supply unit 15 is applied to the sensing electrode 16a of the water level sensor 16 and the purified water supplied to the purified water tank 9 contacts the other sensing electrode 16b of the water level sensor 16, Thus, the resistance value of the water level sensor 16 is divided by the voltage dividing resistor R1 and the output voltage (potential at point C) of the water level sensor 16 is input to the input terminal A / D of the control unit 18 through the buffer 17. Therefore, the controller 18 compares the output voltage of the water level sensor 16 input through the input terminal A / D with a preset reference voltage to determine whether the amount of purified water supplied to the water purification tank 9 is at the full level or Water purification tank 9 while judging whether the water level is low
It controls to store a predetermined amount of purified water.
【０００７】[0007]
【発明が解決しようとする課題】ところで、かような従
来の水位感知回路においては、水位センサ１６に印加さ
れる電圧が直流であり、分圧抵抗Ｒ１により分圧された
前記水位センサ１６の出力電圧なるＣ点の電位が水位セ
ンサ１６の感知電極１６ａのａ点の電位より低いため、
水位センサ１６の両端に電圧差が生じて電気分解が起こ
る。そこで、長時間が経過すると、水位センサ１６が腐
食されて浄水タンク９の水位感知が不可能になるため、
浄水タンク９が溢水されてオーバフローが起こるなどの
解決すべき課題があった。By the way, in such a conventional water level sensing circuit, the voltage applied to the water level sensor 16 is direct current, and the output of the water level sensor 16 is divided by the voltage dividing resistor R1. Since the potential of the voltage C point is lower than the potential of the point a of the sensing electrode 16a of the water level sensor 16,
A voltage difference is generated across the water level sensor 16 to cause electrolysis. Therefore, after a long time has passed, the water level sensor 16 is corroded and the water level of the water purification tank 9 cannot be sensed.
There was a problem to be solved such as overflow of the water purification tank 9 and overflow.
【０００８】そこで、本発明は、上記のごとき種々の問
題点を解決するためになされたものであって、本発明の
目的は、交流型の方形波を水位センサに供給してセンサ
の両端間の電圧差をなくすことにより前記分解によるセ
ンサの腐食を防止でき、浄水タンクの水位を的確に感知
してオーバフローを防止可能な浄水器の水位感知装置を
提供することにある。Therefore, the present invention has been made in order to solve various problems as described above, and an object of the present invention is to supply an AC type square wave to a water level sensor so as to connect between both ends of the sensor. It is an object of the present invention to provide a water level sensing device for a water purifier, which can prevent the sensor from being corroded due to the decomposition by eliminating the voltage difference, and can accurately detect the water level in the water purification tank to prevent overflow.
【０００９】[0009]
【課題を解決するための手段】上記のごとき目的を達成
するために、本発明による浄水器の水位感知装置は、先
処理フィルタ、メンブレンおよび後処理フィルタを通過
させつつ浄水を貯蔵するよう浄水タンクを備えられた浄
水器において、前記浄水タンクの水位を感知する水位感
知手段と、該水位感知手段により感知された水位感知信
号にしたがって前記浄水タンクの水位を制御する制御手
段とからなることを特徴とする。In order to achieve the above object, a water level sensing device of a water purifier according to the present invention is a water purification tank for storing purified water while passing through a pretreatment filter, a membrane and a posttreatment filter. A water purifier provided with: a water level sensing means for sensing the water level of the water purification tank; and a control means for controlling the water level of the water purification tank according to the water level sensing signal sensed by the water level sensing means. And
【００１０】[0010]
【発明の実施の形態】以下、本発明による一実施形態に
ついて添付図面に沿って詳述する。図３のごとく、符号
２０は浄水器の本体であり、該本体２０の前面にはカッ
プ等の取水容器を収納するための収納部２１が形成され
ている。前記本体２０の背面側には水道栓２２に結合さ
れた継手２３に給水管２５の一端が接続され、該給水管
２５の他端には前記水道栓２２から継手２３を通して源
水が給水されることにより監素成分などの各種の有害有
機化合物質を除去する先処理フィルタ２７が接続されて
いる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below in detail with reference to the accompanying drawings. As shown in FIG. 3, reference numeral 20 is a main body of the water purifier, and a storage portion 21 for storing a water intake container such as a cup is formed on the front surface of the main body 20. On the back side of the main body 20, one end of a water supply pipe 25 is connected to a joint 23 connected to a water tap 22, and the other end of the water supply pipe 25 is supplied with source water from the water tap 22 through the joint 23. As a result, a pretreatment filter 27 for removing various harmful organic compounds such as monitor components is connected.
【００１１】さらに、前記先処理フィルタ２７の一側に
は前記先処理フィルタ２７を通過して源水に含まれた各
種の重金属や発癌物質、バクテリアなどの細菌を除去す
るよう内側に図示のない複数のメンブレン膜を形成され
たメンブレン２９が設けられ、前記メンブレン２９の一
側には前記メンブレン２９を通過して源水に含まれた有
毒ガスなどの臭い成分を除去する後処理フィルタ３１が
設けられている。また、前記本体２０の上側には前記後
処理フィルタ３１を通過させた浄水が貯蔵されるよう一
側に給水穴を穿設された浄水タンク３５が着脱可能に安
着され、前記浄水タンク３５内の後面には前記浄水タン
ク３５内に貯蔵された浄水量を感知する満水位および渇
水位センサ３７、３９が装着されている。Further, one side of the pretreatment filter 27 is not shown inside so as to remove various heavy metals, carcinogens and bacteria such as bacteria contained in the source water passing through the pretreatment filter 27. A membrane 29 having a plurality of membrane films is provided, and a post-treatment filter 31 for removing odorous components such as toxic gas contained in the source water passing through the membrane 29 is provided on one side of the membrane 29. Has been. In addition, a water purification tank 35 having a water supply hole on one side is detachably seated on the upper side of the main body 20 so that the water purified by the post-treatment filter 31 is stored therein. On the rear surface, full-water level and dry-water level sensors 37 and 39 for detecting the amount of purified water stored in the purified water tank 35 are mounted.
【００１２】また、前記浄水タンク３５の前面には図示
のない取水口を通して前記浄水タンク３５内の浄水が排
されるよう取水レバー４３が結合され、前記本体２０の
上側には上部覆い４５、４７が結合され、前記本体２０
の背面側には背面覆い４９が結合される。一方、未説明
符号４１は、前記満水位および渇水位センサ３７、３９
の感知電極である。A water intake lever 43 is connected to the front surface of the water purification tank 35 so that the purified water in the water purification tank 35 is discharged through a water intake (not shown), and the upper covers 45 and 47 are provided on the upper side of the main body 20. And the main body 20
A back cover 49 is coupled to the back side of the. On the other hand, the unexplained reference numeral 41 is the above-mentioned full water level and dry water level sensors 37, 39.
Is the sensing electrode of.
【００１３】図４のごとく、前記先処理フィルタ２７、
メンブレン２９、後処理フィルタ３１の上端一側には前
記先処理フィルタ２７、メンブレン２９、後処理フィル
タ３１の交換時にそれぞれのフィルタの使用時間をリセ
ットさせるリプルスイッチ５１、５３、５５が装着され
ている。さらに、前記後処理フィルタ３１の下端には前
記浄水タンク３５内の浄水量、つまり、前記浄水タンク
３５の水位にしたがって開閉動される給水弁５７が装着
され、該給水弁５７の後端には前記先処理フィルタ２７
を通過して前記メンブレン２９に流入される源水が所定
圧をもって前記メンブレン２９で逆浸透圧による浄水可
能に前記メンブレン２９に流入される源水圧を所定圧に
昇圧させる加圧ポンプ５９が装着されている。As shown in FIG. 4, the preprocessing filter 27,
Ripple switches 51, 53 and 55 for resetting the use time of each of the pretreatment filter 27, the membrane 29 and the posttreatment filter 31 are attached to one side of the upper ends of the membrane 29 and the posttreatment filter 31. . Further, a water supply valve 57 that is opened and closed according to the amount of purified water in the water purification tank 35, that is, the water level of the water purification tank 35 is attached to the lower end of the post-treatment filter 31, and at the rear end of the water supply valve 57. The preprocessing filter 27
A pressure pump 59 is installed to raise the pressure of the source water flowing into the membrane 29 to a predetermined pressure so that the source water flowing into the membrane 29 after passing through the membrane 29 can be purified at a predetermined pressure by the membrane 29 by reverse osmotic pressure. ing.
【００１４】上記のごとく構成された浄水器の水位感知
動作を制御するブロック図（図５〜７）に沿って詳述す
る。図５〜７のごとく、直流電源手段１００は、図示の
ない交流電源端から供給される商用交流電圧を前記浄水
器の動作に要する所定の直流電圧に変換して出力する。
さらに、水位感知手段１１０は、前記浄水タンク３５内
に供給されて貯蔵される浄水量、つまり、前記浄水タン
ク３５の水位を感知するものであって、該水位感知手段
１１０は図６、７のごとく交流型の方形波を発生する波
形発生部１１１と、前記波形発生部１１１から発生され
る方形波を印加されて前記浄水タンク３５内に供給され
る浄水量に伴って変化する水位を感知するよう水位セン
サ３７、３９とから構成された水位感知部１１２と、該
水位感知部１１２により感知された水位感知信号の方形
波電圧を増幅して水位センサ３７、３９の両端の電圧差
を所定に保持するようキャパシタＣ１およびインピーダ
ンス増幅器１１５とから構成され、出力端をドライブす
るバッファ１１３と、該バッファ１１３から出力される
方形波信号を平滑して前記制御手段１２５に出力する整
流部１１４とから構成されている。Detailed description will be given with reference to block diagrams (FIGS. 5 to 7) for controlling the water level sensing operation of the water purifier configured as described above. As shown in FIGS. 5 to 7, the DC power supply means 100 converts a commercial AC voltage supplied from an AC power supply end (not shown) into a predetermined DC voltage required for the operation of the water purifier and outputs it.
Further, the water level sensing means 110 senses the amount of purified water supplied and stored in the purified water tank 35, that is, the water level of the purified water tank 35, and the water level sensing means 110 is shown in FIGS. As described above, a waveform generating unit 111 that generates an AC type square wave and a water level that changes with the amount of purified water supplied to the water purification tank 35 by applying the square wave generated from the waveform generating unit 111 are sensed. And a square wave voltage of the water level sensing signal sensed by the water level sensing section 112 to amplify the square wave voltage of the water level sensor 37, 39 so that the voltage difference across the water level sensors 37, 39 is predetermined. A buffer 113 configured to hold the capacitor C1 and an impedance amplifier 115 and driving an output end, and a square wave signal output from the buffer 113 are smoothed. And a rectifier 114 for outputting to the control unit 125 Te.
【００１５】キー入力手段１２０は、前記先処理フィル
タ２７、メンブレン２９、後処理フィルタ３１の使用時
間をクリアするようキー信号を入力するリセットスイッ
チ５１、５３、５５である。また、制御手段１２５は、
前記直流電源手段１００から出力される直流電圧を印加
されて前記浄水器を初期化させるのはもとより、前記水
位感知手段１１０により感知された水位感知信号を入力
されて前記浄水器の全体の浄水動作を制御するマイクロ
コンピュータであって、該制御手段１２５は前記先処理
フィルタ２７、メンブレン２９、後処理フィルタ３１の
使用時間をカウントするタイマを内装され、フィルタ使
用時間によるそれぞれのフィルタの交換時期をロムテー
ブル上に既貯蔵されている。The key input means 120 is reset switches 51, 53 and 55 for inputting a key signal to clear the use time of the pretreatment filter 27, the membrane 29 and the posttreatment filter 31. Further, the control means 125
The DC voltage output from the DC power supply unit 100 is applied to initialize the water purifier, and the water level detection signal sensed by the water level sensing unit 110 is input to the entire water purifier. The control means 125 is equipped with a timer for counting the use time of the pretreatment filter 27, the membrane 29, and the posttreatment filter 31, and controls the replacement time of each filter according to the use time of the filter. It is already stored on the table.
【００１６】ポンプ駆動手段１３０は、前記水位感知手
段１１０により感知された前記浄水タンク３５の水位に
したがって前記浄水タンク内に浄水供給をするよう前記
制御手段１２５から出力される制御信号を受信して加圧
ポンプ５９を駆動制御させ、給水弁駆動手段１３５は前
記水位感知手段１１０により感知された前記浄水タンク
３５の水位にしたがって前記水道栓２２から給水される
源水を供給または遮断するよう前記制御手段１２５から
出力される制御信号を受信して給水弁５７を駆動制御す
る。また、メモリ手段１４０は、前記浄水器の浄水動作
時に前記給水弁５７の開閉（オン、オフ）時間にしたが
って前記制御手段１２５でカウントした先処理フィルタ
２７、メンブレン２９、後処理フィルタ３１の使用時間
を記憶するよう電気によりメモリの内容が消去される
か、記録されるＥＰ−ＲＯＭである。The pump driving means 130 receives a control signal output from the control means 125 to supply purified water into the purified water tank according to the water level of the purified water tank 35 sensed by the water level sensing means 110. The pressurizing pump 59 is driven and controlled, and the water supply valve driving means 135 is controlled to supply or cut off the source water supplied from the tap 22 according to the water level of the water purification tank 35 sensed by the water level sensing means 110. The control signal output from the means 125 is received and the water supply valve 57 is drive-controlled. In addition, the memory means 140 uses the pretreatment filter 27, the membrane 29, and the posttreatment filter 31 which are counted by the control means 125 according to the opening / closing (ON / OFF) time of the water supply valve 57 during the water purification operation of the water purifier. Is an EP-ROM in which the contents of the memory are erased or recorded electrically to store.
【００１７】表示手段１４５は、前記メモリ手段１４０
に記憶された総フィルタ使用時間にしたがって前記制御
手段１２５から出力される制御信号を受信して前記先処
理フィルタ２７、メンブレン２９、後処理フィルタ３１
の交換時間を表示するとともに、前記浄水器の動作状態
の表示する。また図において、前記水位感知手段１１０
の整流部１１４は図７のごとく、前記バッファ１１３の
インピーダンス増幅器１１５から出力される方形波信号
を入力されて所定の遅延時間を有する電圧パルスを出力
するキャパシタＣ２と、該キャパシタＣ２から出力され
る電圧パルスを反転端子から入力されて増幅する演算増
幅器１１６と、該演算増幅器１１６から出力される増幅
電圧を半波整流するダイオードＤ１、Ｄ２と、前記ダイ
オードＤ２により半波整流された電圧信号をフィードバ
ックさせる抵抗Ｒ２と、前記ダイオードＤ２に一側が接
続され他側が接地された負荷抵抗Ｒ３と、前記ダイオー
ドＤ２により半波整流された電圧信号に含まれたリプル
成分をフィルタリングする平滑用キャパシタＣ３とから
構成されている。The display means 145 is the memory means 140.
The control signal output from the control means 125 is received according to the total filter use time stored in the pre-processing filter 27, the membrane 29, and the post-processing filter 31.
The replacement time and the operating state of the water purifier are displayed. In the figure, the water level sensing means 110
As shown in FIG. 7, the rectifier 114 of the capacitor C2 receives the square wave signal output from the impedance amplifier 115 of the buffer 113 and outputs a voltage pulse having a predetermined delay time, and the capacitor C2 outputs the voltage pulse. An operational amplifier 116 that amplifies a voltage pulse input from an inverting terminal, diodes D1 and D2 that half-wave rectify the amplified voltage output from the operational amplifier 116, and a voltage signal half-wave rectified by the diode D2 are fed back. A resistor R2, a load resistor R3 having one side connected to the diode D2 and the other side grounded, and a smoothing capacitor C3 for filtering the ripple component included in the voltage signal half-wave rectified by the diode D2. Has been done.
【００１８】さらに、前記水位感知手段１１０の整流部
１１４は、前記波形発生部１１１から発生される波形が
サイン波の場合には、図８のごとく、キャパシタＣ４、
Ｃ５、抵抗Ｒ４〜Ｒ８、ダイオードＡ３、Ａ４、演算増
幅器ＯＰＡ１、ＯＰＡ２とからなる全波整流回路を構成
して前記インピーダンス増幅器１１５から出力される方
形波信号を平滑化させる。Further, when the waveform generated by the waveform generator 111 is a sine wave, the rectifier 114 of the water level sensing means 110 has a capacitor C4, as shown in FIG.
A full-wave rectifier circuit including C5, resistors R4 to R8, diodes A3 and A4, and operational amplifiers OPA1 and OPA2 is configured to smooth the square wave signal output from the impedance amplifier 115.
【００１９】以下、上記のごとく構成された浄水器の水
位感知装置の作用、効果について述べる。まず、浄水器
に電源が印加されると、直流電源手段１００では図示の
ない交流電源入力端から供給される商用交流電源の交流
電圧を前記浄水器の駆動に要する所定の直流電圧に変換
してそれぞれ駆動回路および制御手段１２５に出力す
る。したがって、制御手段１２５では前記直流電源手段
１００から出力される直流電圧を入力されて浄水器を初
期化させる。この際、浄水を貯蔵する浄水タンク３５の
浄水量、つまり、浄水タンク３５の水位を水位感知手段
１１０で感知してその感知された水位データを制御手段
１２５に出力する。The operation and effect of the water level sensing device of the water purifier constructed as described above will be described below. First, when power is applied to the water purifier, the DC power supply means 100 converts an AC voltage of a commercial AC power supply supplied from an AC power supply input terminal (not shown) into a predetermined DC voltage required for driving the water purifier. It outputs to the drive circuit and the control means 125, respectively. Therefore, the control means 125 receives the DC voltage output from the DC power supply means 100 to initialize the water purifier. At this time, the purified water amount of the purified water tank 35 that stores purified water, that is, the water level of the purified water tank 35 is sensed by the water level sensing means 110, and the sensed water level data is output to the control means 125.
【００２０】前記水位感知手段１１０で浄水タンク３５
の水位感知する動作を述べると、まず、波形発生部１１
１から図９Ａの波形で表示される交流型の方形波信号が
発生され満水位および渇水位センサ３７、３９（水位セ
ンサという）の感知電極４１に印加される。この際、前
記浄水タンク３５内浄水が水位センサ３７、３９の他の
感知電極４２に接続されると、水の自体抵抗を通して水
位センサ３７、３９の感知電極４２にも図９Ａに示す方
形波信号が伝達されて電圧降下された図９Ｂの波形で表
示される方形波が出力される。したがって、前記水位セ
ンサ３７、３９の感知電極４１、４２両端間の電圧差に
より水位センサ３７、３９が電気分解を起こすため、図
９Ｂの波形で表示される方形波電圧をキャパシタＣ１と
インピーダンス増幅器１１５とから構成されたバッファ
１１３を通して増幅され図９Ｃの波形で表示される方形
波信号を出力する。The water level detecting means 110 is used for the water purification tank 35.
The operation of sensing the water level of the waveform generator 11 will be described first.
An AC type square wave signal represented by waveforms 1 to 9A is generated and applied to the sensing electrodes 41 of the full water level and the water level sensors 37 and 39 (referred to as water level sensors). At this time, if the purified water in the purified water tank 35 is connected to the other sensing electrodes 42 of the water level sensors 37 and 39, the square wave signal shown in FIG. Is transmitted and the voltage is dropped, and the square wave displayed in the waveform of FIG. 9B is output. Therefore, the water level sensors 37 and 39 are electrolyzed by the voltage difference between the sensing electrodes 41 and 42 of the water level sensors 37 and 39, so that the square wave voltage displayed in the waveform of FIG. 9B is applied to the capacitor C1 and the impedance amplifier 115. It outputs a square wave signal which is amplified through the buffer 113 composed of and and is displayed in the waveform of FIG. 9C.
【００２１】これにより、前記水位センサ３７、３９の
両端間の電圧差が所定に保持され、前記インピーダンス
増幅器１１５から出力される方形波信号（図９Ｃの波
形）はキャパシタＣ２を通して所定の遅延時間を有する
図９Ｄの波形で表示される電圧パルスを出力する。前記
キャパシタＣ２を通過した電圧パルス（図９Ｄの波形）
は演算増幅器１１６を通して増幅され、その増幅された
電圧がローレベルの場合には、ダイオードＤ１が順方向
となり、演算増幅器１１６を通して増幅された演算増幅
器１１６の反転端子にフィードバックされる。As a result, the voltage difference between both ends of the water level sensors 37 and 39 is maintained at a predetermined value, and the square wave signal (waveform in FIG. 9C) output from the impedance amplifier 115 has a predetermined delay time through the capacitor C2. The voltage pulse shown in the waveform of FIG. 9D is output. Voltage pulse passing through the capacitor C2 (waveform in FIG. 9D)
Is amplified through the operational amplifier 116, and when the amplified voltage is low level, the diode D1 is in the forward direction and is fed back to the inverting terminal of the operational amplifier 116 amplified through the operational amplifier 116.
【００２２】一方、前記演算増幅器１１６を通して増幅
された電圧がハイレベルの場合には、ダイオードＤ２が
順方向となり、演算増幅器１１６を通して増幅された電
圧に含まれたリプル成分は平滑用キャパシタＣ３を通し
てフィルタリングされて平滑用キャパシタＣ３の両端に
水位感知電圧がかかるとともに、制御手段１２５の入力
端子Ａ／Ｄに入力される。したがって、前記制御手段１
２５では入力端子Ａ／Ｄを通して入力される水位センサ
３７、３９の出力電圧の水位感知電圧を既設定された基
準電圧と比較して前記浄水タンク３５に供給された浄水
量が渇水位かを判断しつつ浄水タンク３５に所定量の浄
水が貯蔵されるよう制御する。もし、前記制御手段１２
５で浄水タンク３５の水位が渇水位以上と判断される
と、浄水タンク３５に浄水を供給しなくてもいいので、
浄水タンク３５の水位が渇水位に下がる時まで浄水動作
を控える。On the other hand, when the voltage amplified by the operational amplifier 116 is at a high level, the diode D2 is in the forward direction, and the ripple component contained in the voltage amplified by the operational amplifier 116 is filtered by the smoothing capacitor C3. Then, the water level detection voltage is applied to both ends of the smoothing capacitor C3, and is input to the input terminal A / D of the control means 125. Therefore, the control means 1
In 25, the water level sensing voltage of the output voltage of the water level sensors 37 and 39 input through the input terminal A / D is compared with a preset reference voltage to determine whether the amount of purified water supplied to the water purification tank 35 is a dry water level. At the same time, control is performed so that a predetermined amount of purified water is stored in the purified water tank 35. If the control means 12
When it is determined that the water level of the water purification tank 35 is not less than the dry water level in 5, it is not necessary to supply the water purification tank 35 with the water purification.
The water purification operation is refrained from until the water level of the water purification tank 35 drops to the dry water level.
【００２３】ところで、前記浄水タンク３５の水位が渇
水位以下と判断されると、制御手段１２５は浄水タンク
３５内に浄水を供給するための浄水動作を行うよう給水
弁駆動手段１３５に制御信号を出力する。これにより、
前記給水弁駆動手段１３５では、前記制御手段１２５の
制御により給水弁５７に印加される電源電圧を供給して
給水弁５７を開放させる。前記給水弁５７が開放される
と、水道栓２２から継手２３を通して給水管２５内に水
道水などの源水が給水され初まるが、制御手段１２５は
給水管２５内に給水されてメンブレン２９に流入される
源水を所定圧に昇圧させるよう加圧ポンプ５９を駆動す
るための制御信号をポンプ駆動手段１３０に出力する。
したがって、前記ポンプ駆動手段１３０では前記制御手
段１２５から出力される制御信号を受信して加圧ポンプ
５９に印加される電源電圧を供給して加圧ポンプ５９を
駆動させる。When the water level in the water purification tank 35 is judged to be below the water level, the control means 125 sends a control signal to the water supply valve driving means 135 to perform the water purification operation for supplying the purified water into the water purification tank 35. Output. This allows
The water supply valve drive means 135 supplies the power supply voltage applied to the water supply valve 57 under the control of the control means 125 to open the water supply valve 57. When the water supply valve 57 is opened, the source water such as tap water is supplied from the tap 22 through the joint 23 into the water supply pipe 25 for the first time, but the control means 125 is supplied into the water supply pipe 25 to the membrane 29. A control signal for driving the pressurizing pump 59 so as to raise the inflowing source water to a predetermined pressure is output to the pump driving means 130.
Therefore, the pump driving means 130 receives the control signal output from the control means 125 and supplies the power supply voltage applied to the pressurizing pump 59 to drive the pressurizing pump 59.
【００２４】前記加圧ポンプ５９が駆動されると、給水
弁５７の開放にしたがって水道栓２２から給水管２５内
に給水される源水が先処理フィルタ２７を通過しつつ監
素成分などの各種の有害有機化合物質が除去され、前記
先処理フィルタ２７を通過した源水は給水弁５７を通し
てメンブレン２９に流入される。前記メンブレン２９に
流入された源水は加圧ポンプ５９の駆動にしたがって所
定圧に昇圧されてメンブレン２９を通過するのである
が、メンブレン２９に流入された源水はメンブレン２９
内に形成された複数のメンブレン膜を透過しつつ源水に
含まれた各種の重金属、発癌物質、バクテリアなどの細
菌を除去する。前記メンブレン２９を通過した源水は再
度後処理フィルタ３１を通過しつつ有毒ガスが除臭され
てから、給水穴３３を通して浄水タンク３５内に供給さ
れる浄水動作を行う。When the pressurizing pump 59 is driven, the source water supplied from the tap 22 into the water supply pipe 25 according to the opening of the water supply valve 57 passes through the pretreatment filter 27 and various components such as monitor components. The harmful organic compounds are removed, and the source water that has passed through the pretreatment filter 27 flows into the membrane 29 through the water supply valve 57. The source water flowing into the membrane 29 is pressurized to a predetermined pressure by the driving of the pressurizing pump 59 and passes through the membrane 29. The source water flowing into the membrane 29 is the membrane 29.
It removes various heavy metals, carcinogens, bacteria and other bacteria contained in the source water while permeating through a plurality of membrane membranes formed inside. The source water that has passed through the membrane 29 again passes through the post-treatment filter 31 to be deodorized of the toxic gas, and then is supplied to the water purification tank 35 through the water supply hole 33 to perform the water purification operation.
【００２５】この際、給水穴３３を通して浄水タンク３
５内に供給される浄水量、つまり、前記浄水タンク３５
の水位を水位感知手段１１０で感知してその感知された
水位データを制御手段１２５に出力させる。したがっ
て、波形発生部１１１から図９Ａの波形で表示される交
流型の方形波信号が発生されて水位センサ３７、３９の
感知電極４１に印加され、浄水タンク３５内への浄水の
供給により漸次水位が高まり浄水が水位センサ３７、３
９の他の感知電極４２に接触されると、水の自体抵抗を
通して水位センサ３７、３９の感知電極４２にも図９Ａ
のごとき方形波信号が伝達されて電圧降下された図９Ｂ
の波形で表示される方形波が出力される。At this time, the water purification tank 3 passes through the water supply hole 33.
5, the purified water amount, ie, the purified water tank 35
The water level sensing means 110 senses the water level and the sensed water level data is output to the control means 125. Therefore, the AC type square wave signal displayed by the waveform of FIG. 9A is generated from the waveform generation unit 111 and applied to the sensing electrodes 41 of the water level sensors 37 and 39, and the purified water is gradually supplied to the water purification tank 35 by supplying the purified water. Water level sensor 37, 3
When the other sensing electrodes 42 of 9 are contacted, the sensing electrodes 42 of the water level sensors 37, 39 also pass through the resistance of the water themselves.
A square wave signal such as that shown in FIG.
The square wave displayed with the waveform of is output.
【００２６】したがって、前記水位センサ３７、３９の
感知電極４１、４２に伝達された方形波電圧（図９Ｂの
波形）をキャパシタＣ１とインピーダンス増幅器１１５
とから構成されたバッファ１１３を通して増幅され図９
Ｃの波形で表示される方形波信号を出力する。これによ
り、前記インピーダンス増幅器１１５から出力される方
形波信号（図９Ｃの波形）はキャパシタＣ２を通して図
９Ｄの波形で表示される電圧パルスを出力する。Therefore, the square wave voltage (waveform of FIG. 9B) transmitted to the sensing electrodes 41 and 42 of the water level sensors 37 and 39 is applied to the capacitor C1 and the impedance amplifier 115.
It is amplified through a buffer 113 composed of
The square wave signal displayed by the waveform of C is output. As a result, the square wave signal (waveform of FIG. 9C) output from the impedance amplifier 115 outputs the voltage pulse having the waveform of FIG. 9D through the capacitor C2.
【００２７】前記キャパシタＣ２を通過した電圧パルス
（図９Ｄの波形）は演算増幅器１１６を通して増幅さ
れ、その増幅された電圧がローレベルの場合には、ダイ
オードＤ１が順方向となり、演算増幅器１１６を通して
増幅された電圧あ演算増幅器１１６の反転端子にフィー
ドバックされる。一方、前記演算増幅器１１６を通して
増幅された電圧がハイレベルの場合には、ダイオードＤ
２が順方向となり、演算増幅器１１６を通して増幅され
た電圧に含まれたリプル成分は平滑用キャパシタＣ３を
通してフィルタリングされて平滑用キャパシタＣ３の両
端に水位感知電圧がかかるとともに、制御手段１２５の
入力端子Ａ／Ｄに入力される。The voltage pulse (waveform in FIG. 9D) passing through the capacitor C2 is amplified through the operational amplifier 116, and when the amplified voltage is at the low level, the diode D1 is in the forward direction and amplified through the operational amplifier 116. The generated voltage is fed back to the inverting terminal of the operational amplifier 116. On the other hand, when the voltage amplified through the operational amplifier 116 is at high level, the diode D
2 becomes the forward direction, and the ripple component included in the voltage amplified by the operational amplifier 116 is filtered by the smoothing capacitor C3 to apply the water level sensing voltage across the smoothing capacitor C3 and the input terminal A of the control means 125. Input to / D.
【００２８】したがって、前記制御手段１２５では入力
端子Ａ／Ｄを通して入力される水位センサ３７、３９の
出力電圧の水位感知電圧を既設定された基準電圧と比較
して前記浄水タンク３５に供給された浄水量が満水位か
を判断する。もし、前記浄水タンク３５の水位が満水位
と判断されると、浄水タンク３５への浄水供給を中止す
るよう給水弁駆動手段１３５に制御信号を出力する。こ
れにより、前記給水弁駆動手段１３５では、制御手段１
２５の制御により給水弁５７に印加される電源電圧を遮
断して給水弁５７を閉じる。前記給水弁５７が閉じる
と、制御手段１２５は加圧ポンプ５９の停止のための制
御信号をポンプ駆動手段１３０に出力する。Therefore, in the control means 125, the water level sensing voltage of the output voltage of the water level sensors 37, 39 inputted through the input terminal A / D is compared with the preset reference voltage and supplied to the water purification tank 35. Judge whether the amount of purified water is full. If the water level in the water purification tank 35 is determined to be full, a control signal is output to the water supply valve driving means 135 to stop the water purification supply to the water purification tank 35. As a result, in the water supply valve drive means 135, the control means 1
The power supply voltage applied to the water supply valve 57 is shut off by the control of 25 to close the water supply valve 57. When the water supply valve 57 is closed, the control means 125 outputs a control signal for stopping the pressurizing pump 59 to the pump driving means 130.
【００２９】したがって、前記ポンプ駆動手段１３０で
は制御手段１２５の制御にしたがって加圧ポンプ５９に
印加される電源電圧を遮断して加圧ポンプ５９を停止さ
せる。前記給水弁５７が閉じられ加圧ポンプ５９が停止
されると、水道栓２２から給水管２５内に給水される源
水供給が遮断されて浄水タンク３５内には浄水がそれ以
上には供給されない。かように、制御手段１２５では、
前記水位感知手段１１０により感知された浄水タンク３
５の水位に伴って給水弁５７の開閉動作を制御して浄水
タンク３５内に常時所定量の浄水が貯蔵させるようにす
る。さらに、ユーザーは前記浄水タンク３５の前面に結
合された取水レバー４３を作動させて取水を行うように
なる。Therefore, in the pump driving means 130, the power supply voltage applied to the pressurizing pump 59 is shut off and the pressurizing pump 59 is stopped under the control of the control means 125. When the water supply valve 57 is closed and the pressurizing pump 59 is stopped, the supply of the source water supplied from the water tap 22 into the water supply pipe 25 is cut off, and the purified water is not further supplied into the purified water tank 35. . Thus, in the control means 125,
Water purification tank 3 sensed by the water level sensing means 110
The opening / closing operation of the water supply valve 57 is controlled according to the water level of 5 so that a predetermined amount of purified water is always stored in the purified water tank 35. Further, the user operates the water intake lever 43 connected to the front surface of the water purification tank 35 to take water.
【００３０】一方、本発明の一実施例では浄水タンク３
５の水位を感知する水位感知回路において波形発生部１
１１から発生される波形が方形波の場合、センサ出力信
号を半波整流回路を通して平滑されるのを挙例して述べ
たが、本発明はこれに限定されず、前記波形発生部１１
１から発生される波形がサイン波の場合には、センサ出
力信号を図８のごとく、全波整流回路を通して平滑させ
ても本発明と同一の目的と効果が達成可能となることは
言うまでもない。On the other hand, in one embodiment of the present invention, the water purification tank 3
In the water level sensing circuit for sensing the water level of 5, the waveform generator 1
When the waveform generated from 11 is a square wave, the sensor output signal is smoothed through the half-wave rectifier circuit, but the present invention is not limited to this and the waveform generator 11
When the waveform generated from 1 is a sine wave, it goes without saying that the same object and effect as the present invention can be achieved even if the sensor output signal is smoothed through a full-wave rectifier circuit as shown in FIG.
【００３１】[0031]
【発明の効果】上述のように、本発明による浄水器の水
位感知装置によれば、交流型の方形波を水位センサに供
給してセンサの両端間の電圧差をなくすため、電気分解
によるセンサの腐食が防止可能で、浄水タンクの水位を
的確に感知してオーバブローが防止可能となる優れる効
果を有する。As described above, according to the water level sensing device of the water purifier of the present invention, the AC type square wave is supplied to the water level sensor to eliminate the voltage difference between both ends of the sensor. It has an excellent effect that it can prevent the corrosion of the water, and can accurately detect the water level in the water purification tank to prevent overblowing.
【図１】 従来の浄水器を示す全体斜視図FIG. 1 is an overall perspective view showing a conventional water purifier
【図２】 従来による水位感知回路図[Fig. 2] Conventional water level sensing circuit diagram
【図３】 本発明の一実施例による浄水器を示す分解斜
視図FIG. 3 is an exploded perspective view showing a water purifier according to an embodiment of the present invention.
【図４】 本発明の一実施例による浄水器の背面斜視図FIG. 4 is a rear perspective view of a water purifier according to an embodiment of the present invention.
【図５】 本発明の一実施例による浄水器の全体制御ブ
ロック図FIG. 5 is an overall control block diagram of a water purifier according to an embodiment of the present invention.
【図６】 本発明の一実施例による浄水器の水位感知装
置の詳細ブロック図FIG. 6 is a detailed block diagram of a water level sensing device of a water purifier according to an embodiment of the present invention.
【図７】 本発明の一実施例による浄水器の水位感知装
置の詳細回路図FIG. 7 is a detailed circuit diagram of a water level sensing device for a water purifier according to an embodiment of the present invention.
【図８】 本発明の他実施例による浄水器の水位感知装
置の詳細回路図。FIG. 8 is a detailed circuit diagram of a water level sensing device of a water purifier according to another embodiment of the present invention.
【図９】 図７のそれぞれの部分の出力波形図であっ
て、Ａは図７のａ点の電圧波形図、Ｂは図７のｂ点の電
圧波形図、Ｃは図７のｃ点の電圧波形図、Ｄは図７のｄ
点の電圧波形図である。9 is an output waveform diagram of each part of FIG. 7, where A is a voltage waveform diagram at point a in FIG. 7, B is a voltage waveform diagram at point b in FIG. 7, and C is a waveform diagram at point c in FIG. Voltage waveform diagram, D is d in FIG.
It is a voltage waveform diagram of a point.
２５…給水管 ２７…先処理フィルタ ２
９…メンブレン ３１…後処理フィルタ ３５…浄水タンク ３
７…満水位センサ ３９…渇水位センサ ５７…給水弁 ５
９…加圧ポンプ １００…直流電源手段 １１０…水位感知手段 １
１１…波形発生部 １１２…水位感知部 １１３…バッファ １
１４…整流部 １２０…キー入力手段 １２５…制御手段 １
３０…ポンプ駆動手段 １３５…給水弁駆動手段 １４０…メモリ手段 １
４５…表示手段25 ... Water supply pipe 27 ... Pretreatment filter 2
9 ... Membrane 31 ... Post-treatment filter 35 ... Water purification tank 3
7 ... Full water level sensor 39 ... Drought level sensor 57 ... Water supply valve 5
9 ... Pressurizing pump 100 ... DC power supply means 110 ... Water level sensing means 1
11 ... Waveform generator 112 ... Water level detector 113 ... Buffer 1
14 ... Rectifier 120 ... Key input means 125 ... Control means 1
30 ... Pump driving means 135 ... Water supply valve driving means 140 ... Memory means 1
45 ... Display means
Claims (4)
理フィルタを通過させつつ浄水を貯蔵するよう浄水タン
クが備えられた浄水器において前記浄水タンクの水位を
感知する水位感知手段と、該水位感知手段により感知さ
れた水位感知信号にしたがって前記浄水タンクの水位を
制御する制御手段とからなることを特徴とする浄水器の
水位感知装置。1. A water level sensing means for sensing the water level of the water purification tank in a water purifier equipped with a water purification tank for storing purified water while passing through a pretreatment filter, a membrane and a posttreatment filter, and the water level sensing means. A water level sensing device for a water purifier, comprising: a control means for controlling the water level of the water purification tank according to the sensed water level sensing signal.
波形発生部と、該波形発生部から発生される方形波を印
加されて前記浄水タンクの水位を感知する水位感知部
と、該水位感知部により感知された水位信号の方形波電
圧を増幅するバッファと、該バッファから出力される方
形波信号を平滑させて前記制御手段に出力させる整流部
とから構成されることを特徴とする請求項１に記載の浄
水器の水位感知装置。2. The water level sensing means includes a waveform generating section that generates a square wave, a water level sensing section that senses the water level of the water purification tank by applying a square wave generated from the waveform generating section, and the water level. A buffer for amplifying a square wave voltage of the water level signal sensed by the sensing unit, and a rectifying unit for smoothing the square wave signal output from the buffer and outputting the smoothed square wave signal to the control means. Item 1. A water level sensing device for a water purifier according to Item 1.
電圧差を所定に保持するようキャパシタＣ１およびイン
ピーダンス増幅器とから構成されることを特徴とする請
求項２に記載の浄水器の水位感知装置。3. The water level sensing device of a water purifier according to claim 2, wherein the buffer is composed of a capacitor C1 and an impedance amplifier so as to maintain a predetermined voltage difference across the water level sensor. .
れる方形波信号を入力されて電圧パルスを出力するキャ
パシタＣ２と、該キャパシタＣ２から出力される電圧パ
ルスを増幅する演算増幅器と、該演算増幅器から出力さ
れる増幅電圧を半波整流するダイオードＤ１、Ｄ２と、
前記ダイオードＤ２により半波整流された電圧信号をフ
ィードバックさせる抵抗Ｒ２と、前記ダイオードＤ２に
一側が接続され他側が接地された負荷抵抗Ｒ３と、前記
ダイオードＤ２により半波整流された電圧信号に含まれ
たリプル成分をフィルタリングする平滑用キャパシタＣ
３とから構成させることを特徴とする請求項２に記載の
浄水器の水位感知装置。4. The rectification unit includes a capacitor C2 that receives the square wave signal output from the buffer and outputs a voltage pulse, an operational amplifier that amplifies the voltage pulse output from the capacitor C2, and the operation. Diodes D1 and D2 for half-wave rectifying the amplified voltage output from the amplifier,
A resistor R2 for feeding back the voltage signal half-wave rectified by the diode D2, a load resistor R3 having one side connected to the diode D2 and the other side grounded, and a voltage signal half-wave rectified by the diode D2 are included. Smoothing capacitor C for filtering the ripple component
3. The water level sensing device for a water purifier according to claim 2, characterized in that
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950036371A KR0175882B1 (en) | 1995-10-20 | 1995-10-20 | Water level sensor of water purifier |
| KR199536371 | 1995-10-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09141251A true JPH09141251A (en) | 1997-06-03 |
Family
ID=19430805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8278214A Pending JPH09141251A (en) | 1995-10-20 | 1996-10-21 | Detector for water level of water purifier |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH09141251A (en) |
| KR (1) | KR0175882B1 (en) |
| CN (1) | CN1158986A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100817833B1 (en) * | 2007-02-22 | 2008-03-31 | 웅진코웨이주식회사 | Control system for sensing water overflow |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3742454B2 (en) * | 1996-03-07 | 2006-02-01 | サンデン株式会社 | Clean water supply device |
| JPH09248552A (en) * | 1996-03-13 | 1997-09-22 | Sanden Corp | Purified water supplier |
| CN102458599B (en) * | 2009-06-08 | 2014-09-10 | 熊津豪威株式会社 | Water purifier |
| JP5804468B2 (en) * | 2010-08-17 | 2015-11-04 | ジョプラックス株式会社 | Water purification cartridge, manufacturing method thereof, and water purifier |
| EP2434591A3 (en) * | 2010-09-28 | 2012-05-02 | Tyco Electronics France SAS | Electrical connector with corrosion prevention |
| CN102324859A (en) * | 2011-08-09 | 2012-01-18 | 中环天仪股份有限公司 | Circuit applied to full-wave rectification circuit of ultrasonic wave liquidometer |
| US10926548B2 (en) | 2016-04-29 | 2021-02-23 | Hewlett-Packard Development Company, L.P. | Printing apparatus and methods for detecting fluid levels |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5998790A (en) * | 1982-11-30 | 1984-06-07 | Yamaha Motor Co Ltd | Water purifier |
| JPH04227098A (en) * | 1990-08-03 | 1992-08-17 | Bruce D Burrows | Reverse osmosis water purification system including unit type header manifold |
| JPH0664787U (en) * | 1992-11-14 | 1994-09-13 | 熊津コウエイ株式会社 | Directly connected water purifier |
-
1995
- 1995-10-20 KR KR1019950036371A patent/KR0175882B1/en not_active IP Right Cessation
-
1996
- 1996-10-20 CN CN96121035A patent/CN1158986A/en active Pending
- 1996-10-21 JP JP8278214A patent/JPH09141251A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5998790A (en) * | 1982-11-30 | 1984-06-07 | Yamaha Motor Co Ltd | Water purifier |
| JPH04227098A (en) * | 1990-08-03 | 1992-08-17 | Bruce D Burrows | Reverse osmosis water purification system including unit type header manifold |
| JPH0664787U (en) * | 1992-11-14 | 1994-09-13 | 熊津コウエイ株式会社 | Directly connected water purifier |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100817833B1 (en) * | 2007-02-22 | 2008-03-31 | 웅진코웨이주식회사 | Control system for sensing water overflow |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1158986A (en) | 1997-09-10 |
| KR970020957A (en) | 1997-05-28 |
| KR0175882B1 (en) | 1999-04-01 |
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