JP4841763B2

JP4841763B2 - Drainage method

Info

Publication number: JP4841763B2
Application number: JP2001217793A
Authority: JP
Inventors: 俊彦中尾; 隆中邨; 康久奥山
Original assignee: Panasonic Ecology Systems Co Ltd
Current assignee: Panasonic Ecology Systems Co Ltd
Priority date: 2001-07-18
Filing date: 2001-07-18
Publication date: 2011-12-21
Anticipated expiration: 2021-07-18
Also published as: JP2003028088A

Description

【０００１】
【発明の属する技術分野】
本発明は、水槽と給排水機構を備えた水関連装置に関する。
【０００２】
【従来の技術】
近年、家庭やビルのオフィスなどの住環境において、有害な化学物質が人体に与える影響の問題が取り沙汰される中、様々な空気清浄技術が開発され、その除去対象が従来の粉塵や埃だけでなく、空中に浮遊している様々な化学物質や菌なども含まれるようになり総合的空気浄化能力が求められている。空気清浄機は産業分野において、公害問題を背景として工場排ガスの処理を目的に発達してきたが、この技術を家庭や住環境、あるいは半導体工場の超高清浄度空間の実現に応用されてきているが、中でも水を用いた湿式空気清浄機が最近注目されている。湿式の空気清浄機は水を空気と接触させ粉塵、ガス成分、菌等の空気中の不純物を水側へ移行して空気を清浄化する。除去された不純物は水中に蓄積されていき一定量の濃度になったとき水を交換すれば性能を維持できるため、他の空気清浄化方法のようにフィルター交換などのメンテナンスが容易であり水質の管理をすることにより空気清浄能力の状態を把握することができる利点もある。このように水式の空気清浄機は定期的に水の入換え動作を行うことが重要である。ここで水の入換えは装置を運転したまま連続的に水を供給しつづけるオーバーフロー式、一度運転を止め排水した後清浄な水を供給するバッチ式等があるが、省エネルギー、省資源の観点から通常はバッチ式が用いられる。水式空気清浄機は大型のものが工業用に用いられているが、最近では室内に設置して使用する小型のタイプも登場してきている。従来の水槽を用いた水式空気清浄機としては例えば特開昭６２−６９０３２に公開されているタイプが知られている。図５は一般的な水式空気清浄機を模式的に示している。まず空気が送風機１０１によって水洗塔１０２に送りこまれる。水槽１０３の水はポンプ１０４によって噴射部１０５ａと噴射部１０５ｂから噴射され水洗塔１０２中で空気と激しく接触し空気中の汚れ成分は水側へと移行してエリミネータ−１０６で余分な水滴を除去し水洗塔１０２に接続されたサイクロンセパレータ１０７でさらに水滴が除去され清浄な空気が吹出し口１０８より送出される。汚れ成分が移行した水滴は水洗塔１０２内で落下して水槽１０３へ回収される。また、噴射部１０５ａと噴射部１０５ｂを繋ぐ経路には噴射弁１０９がそれぞれ取りつけられており、噴射水圧や水量を調整できるようになっており、片側だけの噴射も行えるようになっている。また、給水管１１０が給水弁１１１を介して水槽１０３の水面上方に設けられた給水口１１２に接続されており、給水弁１１１を開くことにより給水される。また、水槽１０３には排水弁１１３を備えた排水口１１４が水槽の内壁に開口しており排水弁１１３を開くことで水槽１０３内の水を排出する。排水は通常水位の高低差を利用した重力式が用いられるが、排水管がうまく引き回せない時や室内に設置して排水可能な場所が容易に得られない場合は排水口の後段に排水ポンプを接続して強制的に排水を行う。
【０００３】
【発明が解決しようとする課題】
しかしながら、このような従来の排水方法で排水が進み水槽の水位が０に近づくと、排水口の水封が破れポンプ中に空気が混入して空気と水が撹拌され空気噛み音が発生し居室で使う時に問題となる課題があり、排水ポンプに空気が混入することによる音が発生しない排水方法が要求されている。
【０００４】
また、ポンプ停止時に排水口から排水ポンプまでの経路の水が水槽内へ逆流するという課題があり、排水が水槽へ逆流しない排水方法が要求されている。
【０００５】
また、排水ポンプを用い高速で水を送出するとキャビテーションによる音が発生するという課題があり、キャビテーションによる音の発生が無い排水方法が要求されている。
【０００６】
また、排水が進み水槽底面の排水口の水封が解け、空気が排水口内に混入するして音が発生するという課題があり、排水口での水封が解けるときに生じる音がしない排水方法が要求されている。
【０００７】
本発明は、このような従来の課題を解決するものであり、排水ポンプに空気が混入することによる音が発生しないで排水でき、ポンプまでの経路の排水が水槽へ逆流せず、キャビテーションによる音の発生が無く、排水口での水封が解けるときに生じる音がしない排水方法を提供することである。
【０００８】
【課題を解決するための手段】
本発明の排水方法は、水槽と前記水槽から水を排水するポンプを備え、前記水槽と前記ポンプの間に水溜まり部を配置し、前記水槽は底面に排水口を有し、前記水溜まり部は前記水槽の下部に水平方向に配置され、前記水溜り部の底面から前記水溜り部の下部に配置された前記排水ポンプへと接続され、前記水槽の底面附近から前記水槽壁面の上端を経由して前記水溜り部上面に接続された配管を配置し、前記排水口の水封が解ける前に、前記配管内の水が前記水槽内に落下し前記配管の水封が解け、前記水溜り部内の水を大気に接触させ前記配管内の空気も吸引することにより前記水槽からの排水速度を落すとしたものである。
【０００９】
本発明によれば、排水ポンプに空気が混入することによる音が発生しない排水方法が得られる。また、排水口での水封が解けるときに生じる音がしない排水方法が得られる。
【００１０】
また他の手段は、水位検知手段を有し、水位を判断してポンプに空気が混入する前にポンプを停止するとしたものである。
【００１１】
本発明によれば、排水ポンプに空気が混入することによる音が発生しない排水方法が得られる。
【００１４】
また他の手段は、水槽と水溜り部の間に水の流れる方向を排水方向のみとする排水方向手段を設けるとしたものである。
【００１５】
本発明によれば、ポンプまでの経路の排水が水槽へ逆流しない排水方法が得られる。
【００１６】
また他の手段は、ポンプの後段に流量調整手段を配置するとしたものである。
【００１７】
本発明によれば、キャビテーションによる音の発生が無い排水方法が得られる。
【００２６】
【発明の実施の形態】
請求項１の発明において、水槽と前記水槽から水を排水するポンプを備え、前記水槽と前記ポンプの間に水溜まり部を配置し、前記水槽は底面に排水口を有し、前記水溜まり部は前記水槽の下部に水平方向に配置され、前記水溜り部の底面から前記水溜り部の下部に配置された前記排水ポンプへと接続され、前記水槽の底面附近から前記水槽壁面の上端を経由して前記水溜り部上面に接続された配管を配置し、前記排水口の水封が解ける前に、前記配管内の水が前記水槽内に落下し前記配管の水封が解け、前記水溜り部内の水を大気に接触させ前記配管内の空気も吸引することにより前記水槽からの排水速度を落すとしたものであり、ポンプに空気が混入しないため空気噛み音が発生しない作用を有する。また、配管中の水は水槽の水位と共に下がり、水位が０に近づき配管が大気に開放される水溜り部内に空気が入ることにより、水溜り部に接続された排水ポンプは大気と排水の両方を引くため排水速度が減少し排水口の水封が解けるときに生じる音を緩和する作用を有する。
【００２７】
請求項２の発明において、水位検知手段を有し、水位を判断してポンプに空気が混入する前にポンプを停止するとしたものであり、水位検知手段により水位が０に近づいたことを判断し、空気が混入する前にポンプを停止することにより、ポンプに空気が混入しないため空気噛み音が発生しない作用を有する。
【００２９】
請求項３の発明において、水槽と水溜り部の間に水の流れる方向を排水方向のみとする排水方向手段を設けるとしたものであり、ポンプが停止中において水溜り部からの排水が水槽へ逆流することを防止する作用を有する。
【００３０】
請求項４の発明において、ポンプの後段に流量調整手段を配置するとしたものであり、ポンプ後段に接続された排水管に流れる水の流量を調整することにより、ポンプの排水速度を抑えキャビテーションによる音の発生を防止する作用を有する。
【００３５】
【実施例】
（実施例１）
以下に本発明の実施例を図によって説明する。図１は水槽及び給排水機構を備えた水式空気清浄機を模式的に示している。吸いこみ口１からファン２によって吸引された空気は送風箱３を経由して空気清浄筒４へ送られる。また水槽５の底面の吸水口６に接続されたポンプ７によって送られた水は空気清浄筒４の中央に配置された水噴射塔８に取りつけられたノズル９によって噴射され空気と激しく接触する。このとき空気中の埃やガス等の不純物は水側へ移行し、空気清浄筒４に接続された水滴分離板１０により余分な水滴が遠心分離され清浄な空気が吹出し口１１より送出される。一方不純物を含んだ水滴は空気清浄筒４内を落下して水槽５へ回収される。送風箱３から気水分離板１０までの経路は図のようにａ、ｂ同じ構成で並んで配置されている。装置を運転し除去された空気中の不純物が水槽５の水に蓄積されていくにつれ空気清浄機の不純物の除去能力が低下していく。水槽５には給水管１２が給水弁１３を介して接続され水槽５の上面に配置された給水口１４より給水する。ここで図２を用いて排水機構を詳細に説明する。排水口１５は水槽５の底面に配置され逆止弁１６ａを介して水溜り部１７と接続されている。水溜まり部１７は水槽５の下部に水平方向に配置されており、水溜り部１７の底面から水溜り部１７の下部に配置された排水ポンプ１８へと接続されている。排水ポンプ１８の後段には排水弁１９、続いて逆止弁１６ｂが設置され、さらにその後段に流量調整弁２０が配置されている。水槽５には水位センサー２１が配置されており、水位のレベルに応じて各排水機構を制御できる。
【００３６】
排水を行う時は排水弁１９を開いて排水ポンプ１８を動作させる。水が水槽より排出され水槽５の水位が０になった時点で排水ポンプ１８を停止させることにより、排水ポンプ１８に空気が混入して生じる空気噛み音が発生することなく水槽５の水を完全に排水することができる。ところで水位センサー２１には検知誤差があり、水位が０で排水ポンプ１８を止めても停止が遅れ、空気が排水ポンプ１８に浸入してしまうことを避けるため、水溜り部１７の水量を用いて水位センサー２１の検知誤差を吸収する。よって水溜り部１７の水量は、水位センサー２１の検知誤差を吸収できる量より多く確保する必要がある。水溜り部１７のマージンにより水位センサー２１に誤差があっても確実に排水ポンプ１８への空気の混入を防止できる。また、排水口１５と排水ポンプ１８の間に配置された逆止弁１６ａにより、水の入換え後に排水ポンプ１８が停止しているとき水溜り部１７内の排水が逆流し水槽５の水を汚染することを防止している。すなわち水槽５の容量としては逆止弁１６ａまでとなり、それ以降の経路は排水となる。
【００３７】
また、水槽５の水位が減少し排水口１５の水封が解けて空気が排水口１５に浸入したとき空気が排水口１５の内部で反響する音が発生する。この音は排水速度が早いほど大きくなるため、排水速度を遅くすればこの音を緩和することができる。ここで、本発明の排水方法では前出の水溜り部１７の上面から水槽５の上面より水槽５の底面まで導いた空気抜き管２２を配置する。満水の状態では、空気抜き管２２内も水槽５と同じ水位で水が満たされており排水と共に水位が下がると空気抜き管内２２の水位も共に減少する。ここで水位がさらに減少し、空気抜き管２２の水が完全に水槽５内に落下し水封が解けると水溜り部１７の水も大気圧に降れることになる。この時排水ポンプ１８は水槽５からの水だけでなく水溜り部１７の上面の空気も吸引する負荷が加わるため、水槽５の水を排水する速度が減少する。この空気抜き管２２の水封が解ける時期を排水口１５の水封が解ける直前になるように調整することにより、排水口１５の水封が解けるとき発生する共鳴音を緩和することができる。
【００３９】
また、排水ポンプ１８の流量が大きい場合、いわゆるキャビテーションが生じて音が発生する。キャビテーションの発生は流速すなわち流量に依存し、流量が小さければキャビテーションの発生を防止できる。排水ポンプの後段は排水管２３が接続されており、排水管２３に揚程差があり逆方向に圧力が生じる場合がある。この水圧が高い場合は排水ポンプ１８に負荷がかかるため流量は少ないが、低い場合は流量が大きくなりキャビテーションが発生する恐れがある。本発明の排水方法は流量調整弁２０を調整して流量をキャビテーションの生じない最大流量に設定することができる。
【００４０】
尚、本実施例では圧力調整弁２０を排水ポンプ１８の後段に配置したが、排水ポンプ１８の流量を調節できる手段であれば、例えば直接排水ポンプ１８の流量を調整する制御を行っても同様の効果が期待できる。
【００４１】
尚、今回は実施例１、実施例２について水式の空気清浄機を例に説明したが、給排水機構を有した水槽５を備えた装置であれば同様の効果が期待できる。
【００４２】
【発明の効果】
以上のように本発明によれば、排水口の下段に水溜り部を設け水位が０の時ポンプを停止することにより、水位センサーに検知誤差があっても確実にポンプへの空気の混入を防止して空気噛み音の発生を防止できる効果が得られる。
【００４３】
また、本発明によれば、水溜り部の上面から水槽の底面まで導かれた空気抜き弁を配置して水位が０になった時、排水口の排水速度を遅くすることによりにより、排水口の水封が解ける時に空気が混入して生じる音を緩和する効果が得られる。
【００４４】
また、本発明によれば、排水ポンプの後段に圧力調整弁を配置して、排水管内の圧力に応じて排水流量をキャビテーションが発生しない量に調節することにより、キャビテーションによる音の発生を防止できる効果が得られる。
【図面の簡単な説明】
【図１】水式の空気清浄機を模式的に示す図
【図２】本発明の排水方法による排水回路の一例を模式的に示す図
【図３】従来の排水方法を備えた水式空気清浄機を模式的に示す図
【符号の説明】
５水槽
１５排水口
１６逆止弁
１８排水ポンプ
１９排水弁
２０流量調整弁
２１水位センサー
２２空気抜き管
２３排水管[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water-related device provided with a water tank and a water supply / drainage mechanism.
[0002]
[Prior art]
In recent years, in the living environment such as homes and office buildings, while the problem of the effects of harmful chemical substances on the human body has been addressed, various air purification technologies have been developed, and the removal targets are only conventional dust and dust. In addition, various chemical substances and fungi floating in the air are included, and a comprehensive air purification capability is required. Air purifiers have been developed in the industrial field for the purpose of treating factory exhaust gas against the background of pollution problems, but this technology has been applied to the realization of ultra-high cleanliness spaces in homes and living environments or semiconductor factories. However, wet air cleaners using water have recently attracted attention. The wet air purifier cleans the air by bringing water into contact with the air and transferring impurities in the air such as dust, gas components and bacteria to the water side. The removed impurities are accumulated in the water, and when the water reaches a certain concentration, the performance can be maintained if the water is replaced. There is also an advantage that the state of the air cleaning ability can be grasped by managing. As described above, it is important for the water-type air purifier to periodically perform a water replacement operation. The replacement of water includes an overflow type that continues to supply water while the device is in operation, and a batch type that supplies clean water after stopping operation once, but from the viewpoint of energy and resource saving. Usually, a batch type is used. Large water-type air purifiers are used for industrial purposes, but recently, small types that are installed indoors and used have also appeared. As a conventional water type air cleaner using a water tank, for example, a type disclosed in JP-A-62-69032 is known. FIG. 5 schematically shows a general water-type air cleaner. First, air is sent to the washing tower 102 by the blower 101. The water in the water tank 103 is jetted from the jetting unit 105a and the jetting unit 105b by the pump 104, and comes into violent contact with the air in the washing tower 102. The dirt component in the air moves to the water side, and the eliminator 106 removes excess water droplets. Water droplets are further removed by a cyclone separator 107 connected to the washing tower 102, and clean air is sent out from the outlet 108. The water droplets to which the dirt component has transferred fall in the water washing tower 102 and are collected in the water tank 103. Moreover, the injection valve 109 is each attached to the path | route which connects the injection part 105a and the injection part 105b, and it can adjust now an injection water pressure and water quantity, and can also inject only one side. A water supply pipe 110 is connected to a water supply port 112 provided above the water surface of the water tank 103 via a water supply valve 111, and water is supplied by opening the water supply valve 111. In addition, a drain port 114 having a drain valve 113 is opened in the inner wall of the water tank 103 and the water in the water tank 103 is discharged by opening the drain valve 113. Drainage usually uses a gravity method that uses the difference in level of the water level, but if the drain pipe cannot be routed well, or if it is not easy to obtain a place where it can be drained by installing it indoors, a drain pump is placed after the drain outlet. Connect to forcibly drain.
[0003]
[Problems to be solved by the invention]
However, when drainage proceeds by such a conventional drainage method and the water level of the water tank approaches 0, the water seal of the drainage port is broken and air is mixed in the pump, and air and water are agitated to generate an air chewing sound. There is a problem that becomes a problem when using in a drainage system, and there is a demand for a drainage method that does not generate sound due to air entering the drainage pump.
[0004]
In addition, there is a problem that water in the path from the drain port to the drain pump flows back into the aquarium when the pump is stopped, and a drainage method that prevents the drainage from flowing back into the aquarium is required.
[0005]
In addition, there is a problem that sound generated by cavitation is generated when water is discharged at high speed using a drain pump, and a drainage method that does not generate sound due to cavitation is required.
[0006]
In addition, there is a problem that sound is generated when the drainage proceeds and the water outlet at the bottom of the tank is unsealed, and air enters the water outlet and the water seal at the water outlet is released. Is required.
[0007]
The present invention solves such a conventional problem, and can discharge without generating sound due to air mixing into the drainage pump, and the drainage of the route to the pump does not flow back to the aquarium, and the sound due to cavitation It is an object of the present invention to provide a drainage method that does not generate sound and does not generate sound when the water seal at the drain outlet is released.
[0008]
[Means for Solving the Problems]
The drainage method of the present invention includes a water tank and a pump for draining water from the water tank, a water reservoir is disposed between the water tank and the pump, the water tank has a drain outlet, and the water reservoir is It is arranged horizontally in the lower part of the water tank, connected from the bottom surface of the water reservoir part to the drainage pump disposed in the lower part of the water reservoir part, and from the vicinity of the bottom surface of the water tank via the upper end of the water tank wall surface A pipe connected to the upper surface of the water reservoir is disposed, and before the water seal of the drain outlet is unsealed, the water in the pipe falls into the water tank and the water seal of the pipe is unraveled, The rate of drainage from the water tank is reduced by bringing water into contact with the air and sucking air in the pipe .
[0009]
ADVANTAGE OF THE INVENTION According to this invention, the drainage method which does not generate | occur | produce the sound by air mixing in a drainage pump is obtained. Moreover, the drainage method which does not make the sound which is generated when the water seal at the drain outlet is released is obtained.
[0010]
Another means has a water level detection means, and judges the water level and stops the pump before air enters the pump.
[0011]
ADVANTAGE OF THE INVENTION According to this invention, the drainage method which does not generate | occur | produce the sound by air mixing in a drainage pump is obtained.
[0014]
Another means is that a drainage direction means is provided between the water tank and the water reservoir so that water flows only in the drainage direction.
[0015]
ADVANTAGE OF THE INVENTION According to this invention, the drainage method in which the waste_water | drain of the path | route to a pump does not flow backward to a water tank is obtained.
[0016]
Another means is that the flow rate adjusting means is arranged at the rear stage of the pump.
[0017]
According to the present invention, it is possible to obtain a drainage method that does not generate sound due to cavitation.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
In the invention of claim 1, a water tank and a pump for draining water from the water tank are provided, a water reservoir is disposed between the water tank and the pump, the water tank has a drain outlet on the bottom surface, and the water reservoir is It is arranged horizontally in the lower part of the water tank, connected from the bottom surface of the water reservoir part to the drainage pump disposed in the lower part of the water reservoir part, and from the vicinity of the bottom surface of the water tank via the upper end of the water tank wall surface A pipe connected to the upper surface of the water reservoir is disposed, and before the water seal of the drain outlet is unsealed, the water in the pipe falls into the water tank and the water seal of the pipe is unraveled, The water is brought into contact with the atmosphere and the air in the pipe is also sucked to reduce the drainage speed from the water tank , and since air does not enter the pump, there is an effect that no air-engaging noise is generated. Also, the water in the pipe falls with the water level in the tank, and when the water level approaches zero and the air enters the water pool where the pipe is open to the atmosphere, the drain pump connected to the water pool is both air and waste water. Therefore, the drainage speed is reduced and the sound generated when the drainage port is unsealed is alleviated.
[0027]
In the invention of claim 2, it has a water level detection means, the water level is judged and the pump is stopped before air enters the pump, and the water level detection means judges that the water level has approached zero. By stopping the pump before air is mixed in, the air does not mix into the pump, so that there is no effect of generating an air chewing sound.
[0029]
In the invention of claim 3 , a drainage direction means is provided between the aquarium and the water reservoir so that the direction of water flow is only the drainage direction, and the drainage from the reservoir is directed to the aquarium while the pump is stopped. It has the effect of preventing backflow.
[0030]
In the invention of claim 4 , the flow rate adjusting means is arranged in the latter stage of the pump, and the drainage speed of the pump is suppressed by adjusting the flow rate of the water flowing through the drain pipe connected to the latter stage of the pump. It has the effect | action which prevents generation | occurrence | production of.
[0035]
【Example】
Example 1
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 schematically shows a water-type air purifier equipped with a water tank and a water supply / drainage mechanism. The air sucked by the fan 2 from the suction port 1 is sent to the air cleaning cylinder 4 via the blower box 3. Further, the water sent by the pump 7 connected to the water inlet 6 on the bottom surface of the water tank 5 is jetted by the nozzle 9 attached to the water jet tower 8 disposed at the center of the air cleaning cylinder 4 and comes into violent contact with the air. At this time, impurities such as dust and gas in the air move to the water side, and excess water droplets are centrifuged by the water droplet separating plate 10 connected to the air cleaning cylinder 4, and clean air is sent out from the outlet 11. On the other hand, water droplets containing impurities fall inside the air cleaning cylinder 4 and are collected in the water tank 5. The path from the blower box 3 to the steam / water separator plate 10 is arranged side by side in the same configuration as shown in FIG. As impurities in the air removed by operating the apparatus accumulate in the water in the water tank 5, the ability of the air purifier to remove impurities decreases. A water supply pipe 12 is connected to the water tank 5 via a water supply valve 13 to supply water from a water supply port 14 disposed on the upper surface of the water tank 5. Here, the drainage mechanism will be described in detail with reference to FIG. The drain port 15 is disposed on the bottom surface of the water tank 5 and is connected to the water reservoir 17 via a check valve 16a. The water reservoir 17 is disposed horizontally in the lower part of the water tank 5, and is connected from the bottom surface of the water reservoir 17 to a drainage pump 18 disposed in the lower part of the water reservoir 17. A drain valve 19 and then a check valve 16b are installed at the subsequent stage of the drain pump 18, and a flow rate adjusting valve 20 is disposed at the subsequent stage. A water level sensor 21 is disposed in the water tank 5, and each drainage mechanism can be controlled according to the level of the water level.
[0036]
When draining, the drain valve 19 is opened and the drain pump 18 is operated. When the water is discharged from the water tank and the water level of the water tank 5 becomes 0, the drain pump 18 is stopped, so that the water in the water tank 5 is completely discharged without generating an air-engagement sound caused by air mixing into the drain pump 18. Can be drained. By the way, the water level sensor 21 has a detection error. Even if the water level is 0 and the drainage pump 18 is stopped, the stoppage is delayed, and the amount of water in the water reservoir 17 is used to prevent air from entering the drainage pump 18. Absorbs the detection error of the water level sensor 21. Therefore, the amount of water in the water reservoir 17 needs to be secured more than the amount that can absorb the detection error of the water level sensor 21. Even if there is an error in the water level sensor 21 due to the margin of the water reservoir 17, it is possible to reliably prevent air from entering the drain pump 18. In addition, the check valve 16a disposed between the drain port 15 and the drain pump 18 causes the drainage in the water reservoir 17 to flow backward when the drain pump 18 is stopped after the water is replaced, so that the water in the water tank 5 is drained. Prevents contamination. That is, the capacity of the water tank 5 is up to the check valve 16a, and the subsequent path is drained.
[0037]
Further, when the water level of the water tank 5 decreases, the water seal of the drain port 15 is broken and air enters the drain port 15, a sound is generated in which the air echoes inside the drain port 15. Since this sound increases as the drainage speed increases, this sound can be mitigated if the drainage speed is decreased. Here, in the drainage method of the present invention, the air vent pipe 22 led from the upper surface of the water reservoir 17 to the bottom surface of the water tank 5 from the upper surface of the water tank 5 is disposed. In a full water state, the air vent pipe 22 is also filled with water at the same water level as the water tank 5, and the water level in the air vent pipe 22 decreases when the water level drops together with the drainage. Here the water level is further reduced, water vent line 22 also would be descending to the atmospheric pressure of water falling water seal is a solution Celtic water reservoir 17 completely into the water tank 5. At this time, the drain pump 18 is loaded with not only the water from the water tank 5 but also the air on the upper surface of the water reservoir 17, so the speed of draining the water in the water tank 5 decreases. By adjusting the time when the water seal of the air vent tube 22 is unsealed so that it is just before the water seal of the drain port 15 is unsealed, the resonance sound generated when the water seal of the drain port 15 is unraveled can be mitigated.
[0039]
Further, when the flow rate of the drainage pump 18 is large, so-called cavitation occurs and a sound is generated. The occurrence of cavitation depends on the flow rate, that is, the flow rate. If the flow rate is small, the occurrence of cavitation can be prevented. The drainage pipe 23 is connected to the subsequent stage of the drainage pump, and there is a case where the drainage pipe 23 has a head difference and pressure is generated in the opposite direction. When the water pressure is high, the drain pump 18 is loaded and the flow rate is small. However, when the water pressure is low, the flow rate becomes large and cavitation may occur. In the drainage method of the present invention, the flow rate adjustment valve 20 can be adjusted to set the flow rate to the maximum flow rate that does not cause cavitation.
[0040]
In this embodiment, the pressure regulating valve 20 is arranged at the rear stage of the drainage pump 18. However, as long as it is a means capable of adjusting the flow rate of the drainage pump 18, for example, control for directly adjusting the flow rate of the drainage pump 18 is the same. Can be expected.
[0041]
In addition, although the water-type air cleaner was demonstrated to the Example about Example 1 and Example 2 this time, the same effect can be anticipated if it is an apparatus provided with the water tank 5 which has a water supply / drainage mechanism.
[0042]
【The invention's effect】
As described above, according to the present invention, a water reservoir is provided at the lower stage of the drain outlet, and the pump is stopped when the water level is 0, so that air can be reliably mixed into the pump even if there is a detection error in the water level sensor. The effect which can prevent and generation | occurrence | production of an air chewing sound is acquired.
[0043]
Further, according to the present invention, when the air vent valve led from the upper surface of the water reservoir portion to the bottom surface of the water tank is arranged and the water level becomes 0, the drainage rate of the drainage port is reduced, thereby reducing the drainage port. The effect of alleviating the sound that occurs when air enters when the water seal is released is obtained.
[0044]
In addition, according to the present invention, the pressure regulating valve is disposed at the rear stage of the drainage pump, and by adjusting the drainage flow rate to an amount that does not cause cavitation according to the pressure in the drainage pipe, the generation of sound due to cavitation can be prevented An effect is obtained.
[Brief description of the drawings]
FIG. 1 is a diagram schematically showing a water-type air purifier. FIG. 2 is a diagram schematically showing an example of a drain circuit according to the drainage method of the present invention. FIG. 3 is a diagram of water-type air equipped with a conventional drainage method. Schematic diagram of the cleaner [Explanation of symbols]
5 Water tank 15 Drain port 16 Check valve 18 Drain pump 19 Drain valve 20 Flow control valve 21 Water level sensor 22 Air vent pipe 23 Drain pipe

Claims

A water tank and a pump for draining water from the water tank are provided, a water reservoir is disposed between the water tank and the pump, the water tank has a drain outlet on a bottom surface, and the water reservoir is horizontally disposed at a lower portion of the water tank. Arranged, connected from the bottom surface of the water reservoir to the drainage pump disposed at the bottom of the water reservoir, and connected to the upper surface of the water reservoir via the upper end of the water tank wall surface from near the bottom of the water tank has been arranged a pipe, before the water seal of the drain port can be solved, the water in the pipe is dropped into the water tank to melt the water sealing of the pipe, the water in the water reservoir is brought into contact with the atmosphere A drainage method, wherein the drainage speed from the water tank is reduced by sucking air in the pipe .

The drainage method according to claim 1, further comprising a water level detecting means, wherein the pump is stopped before air is mixed into the pump by judging the water level of the water tank .

The drainage method according to claim 2 , wherein a drainage direction means is provided between the water tank and the water reservoir so that the water flows only in the drainage direction.

The drainage method according to claim 1, wherein a flow rate adjusting means is arranged at the rear stage of the pump.