JP6771784B1

JP6771784B1 - Drainage impeller with balance hole

Info

Publication number: JP6771784B1
Application number: JP2019098512A
Authority: JP
Inventors: 蕭裕明
Original assignee: 合利美股▲分▼有限公司
Priority date: 2019-04-22
Filing date: 2019-05-27
Publication date: 2020-10-21
Anticipated expiration: 2039-05-27
Also published as: TWI704289B; JP2020176623A; TW202040012A

Abstract

【課題】バランスホールを有する排水羽根車を提供する。【解決手段】バランスホールを有する排水羽根車は軸心、環状底板および環状壁面を備える。軸心は径方向に沿って外部へ伸びていく複数のメインブレードを有する。環状底板は複数のメインブレードの底部に配置され、底面が環状底板の外円周に沿って起伏して波状を呈する。環状壁面は底部が環状底板の外周辺縁部に位置し、波状の環状底板に伴って起伏する。環状底板は環状底板を貫通する複数のバランスホールを有する。複数のバランスホールは環状壁面に隣接し、複数のメインブレードの下方または旋転方向の後方に位置付けられ、複数のメインブレードの後方の空間に繋がる。【選択図】図２PROBLEM TO BE SOLVED: To provide a drainage impeller having a balance hole. A drainage impeller with a balance hole comprises an axle, an annular bottom plate and an annular wall surface. The axis has a plurality of main blades extending outward along the radial direction. The annular bottom plate is arranged at the bottom of a plurality of main blades, and the bottom surface undulates along the outer circumference of the annular bottom plate to exhibit a wavy shape. The bottom of the annular wall surface is located at the outer peripheral edge of the annular bottom plate, and undulates along with the wavy annular bottom plate. The annular bottom plate has a plurality of balance holes penetrating the annular bottom plate. The plurality of balance holes are adjacent to the annular wall surface, are positioned below the plurality of main blades or behind the plurality of main blades, and are connected to the space behind the plurality of main blades. [Selection diagram] Fig. 2

Description

本発明は、排水装置に関し、詳しくは排水ポンプ内のバランスホールを有する排水用羽根車に関するものである。 The present invention relates to a drainage device, and more particularly to a drainage impeller having a balance hole in the drainage pump.

エアコンの排水ポンプに生じる騒音の一部分は水中の気泡が排水羽根車のブレードに衝突して生じる破裂音、或いは衝撃を受けた気泡が抵抗の変化によって生じる振動である。従って、羽根車のブレードが水を切って気泡に衝突する際の衝撃力または状況を改善すれば騒音を効果的に低減することができる。 A part of the noise generated in the drainage pump of the air conditioner is the plosive sound generated by the bubbles in the water colliding with the blade of the drainage impeller, or the vibration generated by the changed resistance of the impacted bubbles. Therefore, noise can be effectively reduced by improving the impact force or situation when the blade of the impeller cuts water and collides with air bubbles.

特許文献１により掲示された排水ポンプにおいて、大直径の羽根車は内側ブレードおよび外側ブレードから構成される。内側ブレードおよび外側ブレードは交互に配置されるため、スワールが発生する際、気泡を回転方向の下方へ逃してブレードとの衝突を抑制し、気泡が破裂して生じる騒音と、気体および液体が合流して相互に衝突して生じる振動とを減少させることができる。
しかしながら、羽根車が回転する際、羽根車の上方に位置する気泡はブレードの旋転方向の後方へ移動してブレードに付着し、かつ遠心力が原因でブレードの末端かつ外周に近い位置に残留する。つまり、特許文献１は気泡を誘導できるが、誘導流路が長い過ぎるため、気泡を下方へ効果的かつ迅速に拡散させることができない。 In the drainage pump posted by Patent Document 1, the large-diameter impeller is composed of an inner blade and an outer blade. Since the inner and outer blades are arranged alternately, when a swirl is generated, bubbles are released downward in the direction of rotation to suppress collision with the blades, and the noise generated by the bursting of bubbles merges with gas and liquid. It is possible to reduce the vibration generated by collision with each other.
However, when the impeller rotates, air bubbles located above the impeller move backward in the direction of rotation of the blade and adhere to the blade, and remain at the end and near the outer circumference of the blade due to centrifugal force. .. That is, Patent Document 1 can induce bubbles, but the induction flow path is too long, so that the bubbles cannot be effectively and quickly diffused downward.

特許文献２により掲示された排水ポンプにおいて、羽根車は複数の流路孔（符号２５０）を有する。複数の流路孔はメインプレートおよび補助ブレードの間、かつこれらのブレードの間の中点に均等に配置される。複数の流路孔は水流をブレードの下方から上方へ流動させるか、水流をブレードの上方から下方へ流動させることが役割であるため、水流は中央の貫通孔（符号２５２）を流れることがない。つまり、特許文献２はブレードの上下の水圧を平衡状態に維持したうえで水流が複数の流路孔を流れる、即ち水圧を平衡状態に維持する方式を採用する。
しかしながら、特許文献２は複数の流路孔によって水圧を平衡状態に維持でき、空気中に油分を含有する環境においても良好な排水効果を発揮できるが、水中の気泡を処理する技術について何も掲示していない。一方、羽根車が旋転する際、水中の気泡は通常ブレードの旋転方向の後方へ移動してブレードに付着する。従って、特許文献２における流路孔は気泡を効果的に排出できる排出流路にならない。
つまり、上述した先行技術の記載からは、現在の排水ポンプの排水羽根車が気泡を効果的に排出できる機能を持たないことがわかる。 In the drainage pump posted by Patent Document 2, the impeller has a plurality of flow path holes (reference numeral 250). The plurality of flow holes are evenly distributed between the main plate and the auxiliary blades and at the midpoint between these blades. The water flow does not flow through the central through hole (reference numeral 252) because the role of the plurality of flow holes is to flow the water flow from the bottom to the top of the blade or to flow the water flow from the top to the bottom of the blade. .. That is, Patent Document 2 employs a method in which the water pressures above and below the blade are maintained in an equilibrium state, and then the water flow flows through a plurality of flow path holes, that is, the water pressure is maintained in an equilibrium state.
However, Patent Document 2 can maintain the water pressure in an equilibrium state by a plurality of flow path holes and can exert a good drainage effect even in an environment containing oil in the air, but does not post anything about a technique for treating bubbles in water. Not done. On the other hand, when the impeller rotates, air bubbles in the water usually move backward in the rotation direction of the blade and adhere to the blade. Therefore, the flow path hole in Patent Document 2 does not become a discharge flow path capable of effectively discharging air bubbles.
That is, from the above description of the prior art, it can be seen that the drainage impeller of the current drainage pump does not have a function of effectively discharging air bubbles.

台湾特許Ｉ４９９７２４号公報Taiwan Patent I499724 日本特許５７０７０８６号公報Japanese Patent No. 5707086

本発明は複数のバランスホールによって水中の気泡をブレードの後方に移動させず効果的に排出し、騒音および振動を大幅に低減することができる排水羽根車を提供することを主な目的とする。 An object of the present invention is to provide a drainage impeller capable of effectively discharging air bubbles in water without moving them to the rear of the blade by a plurality of balance holes and significantly reducing noise and vibration.

上述した課題を解決するためのバランスホールを有する排水羽根車は、軸心、環状底板および環状壁面を備える。軸心は連結溝および複数のメインブレードを有する。
連結溝は軸心の先端部に形成される。駆動軸は連結溝に嵌まり込んで軸心を旋転させる。複数のメインブレードは軸心の径方向に沿って外部へ伸びて形成され、延伸方向に沿って形成した仮想線が仮想延長線と定義される。環状底板は複数のメインブレードの底部に配置され、軸心に一定の距離を置いて軸心、複数のメインブレードおよび環状底板の間に複数の空洞部を形成する。環状底板の底面は環状底板の外円周に沿って起伏して波状を呈する。環状壁面は底部が環状底板の外周辺縁部に位置し、波状の環状底板に伴って起伏し、頂部が起伏して波状を呈する。つまり、環状壁面において、底部が高ければ頂部も高い。底部が低ければ頂部も低い。環状底板は環状底板を貫通する複数のバランスホールを有する。複数のバランスホールは環状壁面の近くに配置され、孔辺縁部と環状壁面との間の距離が１ｍｍ以下である。上述した構造により、軸心は複数のメインブレードとともに旋転する。複数のバランスホールは複数のメインブレードの下方または仮想延長線の旋転方向の後方に位置付けられ、かつ複数のメインブレードの後方の空間に繋がる。つまり、複数のバランスホールは複数のメインブレードの仮想延長線の旋転方向の前方に配置されない。複数のバランスホールが一つずつメインブレードの後方に配置される際、バランスホールの孔辺縁部とメインブレードとの間の距離は１ｍｍ以下である。

A drainage impeller having a balance hole for solving the above-mentioned problems includes a shaft center, an annular bottom plate, and an annular wall surface. The axis has a connecting groove and a plurality of main blades.
The connecting groove is formed at the tip of the shaft center. The drive shaft fits into the connecting groove and rotates the shaft center. The plurality of main blades are formed extending to the outside along the radial direction of the axis, an imaginary line formed along the extending direction is defined as a virtual extension line. The annular bottom plate is arranged at the bottom of the plurality of main blades, and forms a plurality of cavities between the axis, the plurality of main blades, and the annular bottom plate at a certain distance from the axis. The bottom surface of the annular bottom plate has an undulating shape along the outer circumference of the annular bottom plate. The bottom of the annular wall surface is located at the outer peripheral edge of the annular bottom plate, and is undulating along with the wavy annular bottom plate, and the top is undulating and wavy. That is, on the annular wall surface, the higher the bottom, the higher the top. The lower the bottom, the lower the top. The annular bottom plate has a plurality of balance holes penetrating the annular bottom plate. The plurality of balance holes are arranged near the annular wall surface, and the distance between the hole edge portion and the annular wall surface is 1 mm or less. Due to the structure described above, the axis rotates with the plurality of main blades. The plurality of balance holes are located below the plurality of main blades or behind the virtual extension lines in the rotational direction, and are connected to the space behind the plurality of main blades. That is, a plurality of balance holes are not disposed in front of the flipping direction of the virtual extension line of the plurality of main blades. When a plurality of balance holes are arranged one by one behind the main blade, the distance between the hole edge portion of the balance hole and the main blade is 1 mm or less.

上述した構造の特徴により、本発明によるバランスホールを有する排水羽根車が作動する際、複数のバランスホールは気泡をブレードの後方に移動させず、外部へ排出するため、気泡が原因で騒音および振動を引き起こすという問題を解決することができる。 Due to the above-mentioned structural features, when the drainage impeller having the balance holes according to the present invention is operated, the plurality of balance holes do not move the air bubbles behind the blades but discharge them to the outside, so that the air bubbles cause noise and vibration. Can solve the problem of causing.

本発明の第１実施形態によるバランスホールを有する排水羽根車を示す斜視図である。It is a perspective view which shows the drainage impeller having the balance hole by 1st Embodiment of this invention. 本発明の第１実施形態によるバランスホールを有する排水羽根車を示す平面図である。It is a top view which shows the drainage impeller having the balance hole by 1st Embodiment of this invention. 図２中の３−３線に沿った断面図である。It is sectional drawing along the 3-3 line in FIG. 本発明の第１実施形態によるバランスホールを有する排水羽根車の作動状態を示す断面図である。It is sectional drawing which shows the operating state of the drainage impeller having the balance hole by 1st Embodiment of this invention. 本発明の第２実施形態によるバランスホールを有する排水羽根車を示す平面図である。It is a top view which shows the drainage impeller having the balance hole by 2nd Embodiment of this invention. 図５中の６−６線に沿った断面図である。It is sectional drawing along the line 6-6 in FIG. 本発明の第３実施形態によるバランスホールを有する排水羽根車を示す平面図である。It is a top view which shows the drainage impeller having the balance hole by 3rd Embodiment of this invention. 図７中の８−８線に沿った断面図である。It is sectional drawing along the line 8-8 in FIG. 本発明の第３実施形態によるバランスホールを有する別の一つの排水羽根車を示す平面図である。It is a top view which shows another drainage impeller which has the balance hole by 3rd Embodiment of this invention. 本発明の第４実施形態によるバランスホールを有する排水羽根車を示す平面図である。It is a top view which shows the drainage impeller having the balance hole by 4th Embodiment of this invention. 図１０中の１１−１１線に沿った断面図である。It is sectional drawing along the line 11-11 in FIG. 本発明の第５実施形態によるバランスホールを有する排水羽根車を示す平面図である。It is a top view which shows the drainage impeller having the balance hole by 5th Embodiment of this invention. 図１２中の１３−１３線に沿った断面図である。It is sectional drawing which follows the line 13-13 in FIG. 本発明の第６実施形態によるバランスホールを有する排水羽根車を示す平面図である。It is a top view which shows the drainage impeller having the balance hole by 6th Embodiment of this invention. 図１４中の１５−１５線に沿った断面図である。It is sectional drawing along the line 15-15 in FIG. 本発明の第３実施形態によるバランスホールを有する別の一つの排水羽根車を示す斜視図である。It is a perspective view which shows another drainage impeller which has the balance hole by 3rd Embodiment of this invention. 図１６の右側面図である。It is a right side view of FIG.

以下、本発明によるバランスホールを有する排水用羽根車を図面に基づいて説明する。 Hereinafter, a drainage impeller having a balance hole according to the present invention will be described with reference to the drawings.

（第１実施形態）
図１から図３に示すように、本発明の第１実施形態によるバランスホールを有する排水羽根車１０は、軸心１１、環状底板１５、および環状壁面１７から構成される。 (First Embodiment)
As shown in FIGS. 1 to 3, the drainage impeller 10 having the balance hole according to the first embodiment of the present invention is composed of a shaft center 11, an annular bottom plate 15, and an annular wall surface 17.

軸心１１は、連結溝１１１および複数のメインブレード１２を有する。連結溝１１１は軸心１１の先端部に形成される。モーター９２は駆動軸９２によって軸心１１の連結溝１１１に嵌まり込んで軸心１１を旋転させる。複数のメインブレード１２は軸心１１の径方向に沿って外部へ伸びて形成され、延伸方向に沿って形成した仮想線が仮想延長線ＶＬと定義される。 The axis 11 has a connecting groove 111 and a plurality of main blades 12. The connecting groove 111 is formed at the tip of the shaft center 11. The motor 92 is fitted into the connecting groove 111 of the shaft center 11 by the drive shaft 92 to rotate the shaft center 11. The plurality of main blades 12 are formed so as to extend outward along the radial direction of the axis 11, and the virtual line formed along the extending direction is defined as the virtual extension line VL.

環状底板１５は、複数のメインブレード１２の底部に配置され、軸心１１に一定の距離を置いて軸心１１、複数のメインブレード１２および環状底板１５の間に複数の空洞部１６を形成する。環状底板１５の底面は環状底板１５の外円周に沿って起伏して波状を呈する。 The annular bottom plate 15 is arranged at the bottoms of the plurality of main blades 12, and forms a plurality of cavity portions 16 between the axis 11, the plurality of main blades 12, and the annular bottom plate 15 at a certain distance from the axis 11. .. The bottom surface of the annular bottom plate 15 undulates along the outer circumference of the annular bottom plate 15 and exhibits a wavy shape.

環状壁面１７は、底部が環状底板１５の外周辺縁部に位置し、波状の環状底板１５に伴って起伏し、頂部が起伏して波状を呈する。つまり、環状壁面１７において、底部が高ければ頂部も高い。底部が低ければ頂部も低い。 The bottom of the annular wall surface 17 is located at the outer peripheral edge of the annular bottom plate 15, and is undulating along with the wavy annular bottom plate 15, and the top is undulating and wavy. That is, in the annular wall surface 17, the higher the bottom, the higher the top. The lower the bottom, the lower the top.

環状底板１５は、環状底板１５を貫通する複数のバランスホール１５１を有する。複数のバランスホール１５１は環状壁面１７の近くに配置され、孔辺縁部と環状壁面１７との間の距離が１ｍｍ以下である。比較的好ましい場合、複数のバランスホール１５１が環状壁面１７に隣接すればバランスホール１５１の孔辺縁部と環状壁面１７の内壁面との間の距離がなくなる。詳しく言えば、軸心１１は複数のメインブレード１２とともに旋転する。
複数のバランスホール１５１は複数のメインブレード１２の旋転方向の後方に位置付けられ、かつ複数のメインブレード１２の後方の空間に繋がる。バランスホール１５１の孔辺縁部とメインブレード１２との間の距離は１ｍｍ以下である。距離が小さければ小さいほどよい。比較的好ましい場合、バランスホール１５１の孔辺縁部がメインブレード１２の後側面に隣接すれば、バランスホール１５１の孔辺縁部とメインブレード１２との間の距離がなくなる、即ちバランスホール１５１の孔辺縁部がメインブレード１２の後方に密接する。またバランスホール１５１を配置する際、配置位置を考慮する必要がある。詳しく言えば、一つのメインブレード１２から遠く離れて別の一つのメインブレード１２に近い位置にバランスホール１５１を配置すれば、バランスホール１５１に近いメインブレード１２の後方の気泡に良好な排出流路を形成できる。 The annular bottom plate 15 has a plurality of balance holes 151 penetrating the annular bottom plate 15. The plurality of balance holes 151 are arranged near the annular wall surface 17, and the distance between the hole edge portion and the annular wall surface 17 is 1 mm or less. In a relatively preferable case, if the plurality of balance holes 151 are adjacent to the annular wall surface 17, the distance between the hole edge portion of the balance hole 151 and the inner wall surface of the annular wall surface 17 is eliminated. More specifically, the axis 11 rotates together with the plurality of main blades 12.
The plurality of balance holes 151 are positioned behind the plurality of main blades 12 in the rotational direction, and are connected to the space behind the plurality of main blades 12. The distance between the edge of the balance hole 151 and the main blade 12 is 1 mm or less. The smaller the distance, the better. In a relatively preferable case, if the hole edge portion of the balance hole 151 is adjacent to the rear side surface of the main blade 12, the distance between the hole edge portion of the balance hole 151 and the main blade 12 is eliminated, that is, the balance hole 151 The edge of the hole is in close contact with the rear of the main blade 12. Further, when arranging the balance hole 151, it is necessary to consider the arrangement position. More specifically, if the balance hole 151 is arranged at a position far from one main blade 12 and close to another main blade 12, a good discharge flow path for air bubbles behind the main blade 12 near the balance hole 151. Can be formed.

第１実施形態において、複数のメインブレード１２は環状壁面１７に連結され、連結箇所が波状の環状壁面１７の頂部の起伏構造の山部にある。複数のメインブレード１２の頂部はメインブレード１２と連結した環状壁面１７の頂部より低い。複数のメインブレード１２は直接環状壁面１７に連結され、連結位置が仮想延長線ＶＬと環状壁面１７との交差位置にある。 In the first embodiment, the plurality of main blades 12 are connected to the annular wall surface 17, and the connecting portion is located at the mountain portion of the undulating structure at the top of the wavy annular wall surface 17. The tops of the plurality of main blades 12 are lower than the tops of the annular wall surface 17 connected to the main blades 12. The plurality of main blades 12 are directly connected to the annular wall surface 17, and the connection position is at the intersection of the virtual extension line VL and the annular wall surface 17.

以上は第１実施形態の構築についての説明である。続いて作動状況を説明する。 The above is the description of the construction of the first embodiment. Next, the operating state will be described.

図４に示すように、本発明の第１実施形態によるバランスホールを有する排水羽根車１０を作動させる際、軸心１１の先端部とモーター９１の駆動軸９２を嵌め合わせ、排水羽根車１０を集水溝９５に格納する。集水槽９５に水が溜まったうえでモーター９１が排水羽根車１０を駆動して旋転させる際、集水溝９５の中の水は波状の環状底板１５の底面の起伏構造および頂面の複数のメインブレード１２によって掻き回され、スワールを生じさせ、続いて排水口９６から外部へ排出される。一方、波状の環状底板１５の底面の起伏構造および波状の環状壁面１７の起伏構造は撥水効果を生じ、気泡発生を抑制することができる。
撥水過程において気泡が発生する際、環状底板１５の頂面の気泡は排水羽根車１０の旋転に伴って生じた遠心力によって環状壁面１７へ移動し、環状壁面１７の内面に衝突すると同時に複数のメインブレード１２の旋転方向の後方空間へ移動して複数のメインブレード１２に付着する。このとき複数のバランスホール１５１は複数のメインブレード１２の後方の空間に繋がるため、気泡を逃して複数のバランスホール１５１の下方へ排出することができる。水は複数のバランスホール１５１によって流入したり流出したりすることによって環状底板１５の下方および上方の水圧を平衡状態に維持し、同時にスワールとともに排水口９６から外部へ流出することができる。一方、複数のバランスホール１５１は複数のメインブレード１２の後方、即ち気泡が存在する位置に隣接するため、気泡を残留させず排出することが容易である。
上述した構造特徴により、気泡が潰れて騒音を発生する、気泡が抵抗の変化によって振動を発生するという問題を抑制できる。つまり、本発明による技術は騒音および振動を大幅に低減できる。 As shown in FIG. 4, when operating the drainage impeller 10 having the balance hole according to the first embodiment of the present invention, the tip of the shaft center 11 and the drive shaft 92 of the motor 91 are fitted to fit the drainage impeller 10. It is stored in the catchment groove 95. When the motor 91 drives the drainage impeller 10 to rotate the water in the water collecting tank 95 after the water is collected, the water in the water collecting groove 95 has an undulating structure on the bottom surface of the wavy annular bottom plate 15 and a plurality of top surfaces. It is agitated by the main blade 12 to generate a swirl, which is subsequently discharged from the drain port 96 to the outside. On the other hand, the undulating structure of the bottom surface of the wavy annular bottom plate 15 and the undulating structure of the wavy annular wall surface 17 produce a water-repellent effect and can suppress the generation of bubbles.
When bubbles are generated in the water repellent process, the bubbles on the top surface of the annular bottom plate 15 move to the annular wall surface 17 due to the centrifugal force generated by the rotation of the drainage impeller 10, collide with the inner surface of the annular wall surface 17, and at the same time, a plurality. The main blade 12 moves to the rear space in the rotational direction and adheres to the plurality of main blades 12. At this time, since the plurality of balance holes 151 are connected to the space behind the plurality of main blades 12, air bubbles can escape and be discharged below the plurality of balance holes 151. Water can maintain the water pressures below and above the annular bottom plate 15 in an equilibrium state by flowing in and out through the plurality of balance holes 151, and at the same time, can flow out from the drain port 96 together with the swirl. On the other hand, since the plurality of balance holes 151 are adjacent to the rear of the plurality of main blades 12, that is, the positions where the air bubbles exist, it is easy to discharge the air bubbles without leaving them.
Due to the structural features described above, it is possible to suppress the problem that the bubbles are crushed to generate noise and the bubbles generate vibration due to the change in resistance. That is, the technique according to the present invention can significantly reduce noise and vibration.

（第２実施形態）
図５および図６に示したのは本発明の第２実施形態によるバランスホールを有する排水羽根車２０である。第１実施形態との違いは次のとおりである。 (Second Embodiment)
5 and 6 show a drainage impeller 20 having a balance hole according to the second embodiment of the present invention. The differences from the first embodiment are as follows.

第２実施形態はさらに複数のサブブレード２３を備える。複数のサブブレード２３は環状底板２５の頂面に配置され、軸心２１の径方向に沿って放射状に広がり、軸心２１に接触せず一定の距離を置く。複数のサブブレード２３は複数の空洞部２６まで伸びず、環状壁面２７に連結され、延伸方向に沿って形成した仮想線が仮想延長線ＶＬと定義される。 The second embodiment further includes a plurality of sub blades 23. The plurality of sub blades 23 are arranged on the top surface of the annular bottom plate 25, spread radially along the radial direction of the axial center 21, and keep a certain distance without contacting the axial center 21. The plurality of sub blades 23 do not extend to the plurality of cavity portions 26, are connected to the annular wall surface 27, and a virtual line formed along the extending direction is defined as a virtual extension line VL.

第２実施形態において、複数のバランスホール２５１は、複数のメインブレード２２および複数のサブブレード２３の下方に位置付けられ、かつ複数のメインブレード２２および複数のサブブレード２３の後方の空間に繋がる。 In the second embodiment, the plurality of balance holes 251 are located below the plurality of main blades 22 and the plurality of sub blades 23, and are connected to the space behind the plurality of main blades 22 and the plurality of sub blades 23.

第２実施形態において、複数のメインブレード２２および複数のサブブレード２３は頂部の高さが同じである。複数のメインブレード２２および複数のサブブレード２３は連結箇所が波状の環状壁面２７の頂部の起伏構造の山部にある。複数のメインブレード２２および複数のサブブレード２３の頂部はメインブレード２２およびサブブレード２３と連結した環状壁面２７の頂部より低い。波状の環状壁面２７の頂部の起伏構造の谷部に応じて複数のメインブレード２２および複数のサブブレード２３を環状壁面２７より低く設計する方式は回転中の複数のメインブレード２２および複数のサブブレード２３が水を掻き回し、環状壁面２７の頂部から外部へ飛ばす事態を抑制できる。また複数のサブブレード２３は直接環状壁面２７に連結され、連結位置が仮想延長線ＶＬと環状壁面２７との交差位置にある。 In the second embodiment, the plurality of main blades 22 and the plurality of sub blades 23 have the same height at the top. The plurality of main blades 22 and the plurality of sub blades 23 are connected at a mountain portion of an undulating structure at the top of a wavy annular wall surface 27. The tops of the plurality of main blades 22 and the plurality of sub blades 23 are lower than the tops of the annular wall surface 27 connected to the main blade 22 and the sub blades 23. A method of designing the plurality of main blades 22 and the plurality of sub blades 23 lower than the annular wall surface 27 according to the valley portion of the undulating structure at the top of the wavy annular wall surface 27 is a method of designing the plurality of main blades 22 and the plurality of sub blades during rotation. It is possible to prevent the 23 from stirring the water and flying it from the top of the annular wall surface 27 to the outside. Further, the plurality of sub blades 23 are directly connected to the annular wall surface 27, and the connection position is at the intersection of the virtual extension line VL and the annular wall surface 27.

第２実施形態によるバランスホールを有する排水羽根車２０を作動させる際、複数のバランスホール２５１は複数のメインブレード２２および複数のサブブレード２３の後方に分布せず、これらの下方に位置付けられる、かつ複数のメインブレード２２および複数のサブブレード２３の後方の空間に繋がるため、回転中の排水羽根車２０は複数のバランスホール２５１によって気泡を下方へ排出することができる。一方、増設した複数のサブブレード２３は複数のメインブレード２２とともに撥水効果を向上させることができる。
図５および図６に示すように、第２実施形態は第１実施形態における部分のメインブレードの一部をサブブレードに入れ替えるため、撥水ブレードの数は変わらない。以上は本発明を説明するための一例に過ぎないため、本発明を限定できない。つまり、本発明は第１実施形態においてメインブレードのほかにサブブレードを増設することができる。 When operating the drainage impeller 20 having the balance holes according to the second embodiment, the plurality of balance holes 251 are not distributed behind the plurality of main blades 22 and the plurality of sub blades 23, and are positioned below them. Since it is connected to the space behind the plurality of main blades 22 and the plurality of sub blades 23, the rotating drainage impeller 20 can discharge air bubbles downward by the plurality of balance holes 251. On the other hand, the added plurality of sub blades 23 can improve the water repellent effect together with the plurality of main blades 22.
As shown in FIGS. 5 and 6, in the second embodiment, a part of the main blade of the portion in the first embodiment is replaced with the sub blade, so that the number of water repellent blades does not change. Since the above is only an example for explaining the present invention, the present invention cannot be limited. That is, in the first embodiment, the present invention can add a sub blade in addition to the main blade.

第２実施形態において、複数のメインブレード２２および複数のサブブレード２３は波状の環状壁面２７の頂部の起伏構造の山部に位置付けられるため、波状の環状壁面の頂部の起伏構造に伴って水を掻き回して最良の撥水効果を発揮することができる。言い換えれば、複数のメインブレード２２および複数のサブブレード２３の配置位置が環状壁面２７の頂部の起伏構造の山部または谷部でなければ、撥水効果を向上させることができない。 In the second embodiment, since the plurality of main blades 22 and the plurality of sub blades 23 are positioned at the peaks of the undulating structure at the top of the wavy annular wall surface 27, water is supplied along with the undulating structure at the top of the wavy annular wall surface 27. It can be stirred to achieve the best water repellent effect. In other words, the water repellent effect cannot be improved unless the positions of the plurality of main blades 22 and the plurality of sub blades 23 are the peaks or valleys of the undulating structure at the top of the annular wall surface 27.

第２実施形態において、複数のバランスホール２５１は複数のサブブレード２３の下方に配置されるが、これに限らず、複数のサブブレード２３の後方に配置されてもよい。複数のバランスホール２５１の配置方式は第１実施形態においてメインブレードを配置する方式と同じであり、一つのサブブレード２３に隣接する位置が配置位置である。 In the second embodiment, the plurality of balance holes 251 are arranged below the plurality of sub blades 23, but the present invention is not limited to this, and the plurality of balance holes 251 may be arranged behind the plurality of sub blades 23. The arrangement method of the plurality of balance holes 251 is the same as the method of arranging the main blade in the first embodiment, and the position adjacent to one sub blade 23 is the arrangement position.

第２実施形態のほかの構造および達成できる効果は第１実施形態と同じであるため、詳細な説明を省略する。 Since the other structures of the second embodiment and the effects that can be achieved are the same as those of the first embodiment, detailed description thereof will be omitted.

（第３実施形態）
図７および図８に示したのは本発明の第３実施形態によるバランスホールを有する排水羽根車３０である。第２実施形態との違いは次のとおりである。 (Third Embodiment)
7 and 8 show a drainage impeller 30 having a balance hole according to the third embodiment of the present invention. The differences from the second embodiment are as follows.

第３実施形態はさらに補助ブレード３４を備える。複数の補助ブレード３４は複数のサブブレード３３より短く、環状底板３５の頂面に配置される。複数の補助ブレード３４は軸心３１に接触せず一定の距離を置いて軸心３１の径方向に沿って放射状に広がる。複数の補助ブレード３４は複数の空洞部３６まで伸びず、環状壁面３７に連結され、延伸方向に沿って形成した仮想線が仮想延長線ＶＬと定義される。環状底板３５の複数のバランスホール３５１は複数の補助ブレード３４の下方にも配置され、かつ複数の補助ブレード３４の後方の空間に繋がる。 The third embodiment further includes an auxiliary blade 34. The plurality of auxiliary blades 34 are shorter than the plurality of sub blades 33 and are arranged on the top surface of the annular bottom plate 35. The plurality of auxiliary blades 34 do not come into contact with the axial center 31 and spread radially along the radial direction of the axial center 31 at a certain distance. The plurality of auxiliary blades 34 do not extend to the plurality of cavity portions 36, are connected to the annular wall surface 37, and a virtual line formed along the extending direction is defined as a virtual extension line VL. The plurality of balance holes 351 of the annular bottom plate 35 are also arranged below the plurality of auxiliary blades 34, and are connected to the space behind the plurality of auxiliary blades 34.

第３実施形態において、複数のメインブレード３２、複数のサブブレード３３および複数の補助ブレード３４は頂部の高さが同じである。複数のメインブレード３２および複数のサブブレード３３の連結位置は波状の環状壁面３７の頂部の起伏構造の谷部にある。複数のメインブレード３２および複数のサブブレード３３の頂部の高さは波状の環状壁面３７の頂部の高さが同じである。複数の補助ブレード３４の連結位置は波状の環状壁面３７の頂部の起伏構造の山部にある。一方、複数のサブブレード３３は直接環状壁面３７に連結され、連結位置が仮想延長線ＶＬと環状壁面３７との交差位置にある。
複数のメインブレード３２および複数のサブブレード３３は波状の環状壁面３７の頂部の起伏構造の谷部に位置付けられ、複数の補助ブレード３４は波状の環状壁面３７の頂部の起伏構造の山部に位置付けられるため、波状の環状壁面３７の頂部の起伏構造に伴って水を掻き回して最良の撥水効果を発揮することができる。言い換えれば、複数のメインブレード３２、複数のサブブレード３３および複数の補助ブレード３４の配置位置が環状壁面３７の頂部の起伏構造の山部または谷部でなければ、撥水効果を向上させることができない。 In the third embodiment, the plurality of main blades 32, the plurality of sub blades 33, and the plurality of auxiliary blades 34 have the same height at the top. The connection position of the plurality of main blades 32 and the plurality of sub blades 33 is at the valley of the undulating structure at the top of the wavy annular wall surface 37. The height of the tops of the plurality of main blades 32 and the plurality of sub blades 33 is the same as the height of the tops of the wavy annular wall surface 37. The connection position of the plurality of auxiliary blades 34 is located at the mountain portion of the undulating structure at the top of the wavy annular wall surface 37. On the other hand, the plurality of sub blades 33 are directly connected to the annular wall surface 37, and the connection position is at the intersection of the virtual extension line VL and the annular wall surface 37.
The plurality of main blades 32 and the plurality of sub blades 33 are positioned at the valleys of the undulating structure at the top of the wavy annular wall surface 37, and the plurality of auxiliary blades 34 are positioned at the peaks of the undulating structure at the top of the wavy annular wall surface 37. Therefore, the best water-repellent effect can be exhibited by stirring the water along with the undulating structure of the top of the wavy annular wall surface 37. In other words, if the arrangement positions of the plurality of main blades 32, the plurality of sub blades 33, and the plurality of auxiliary blades 34 are not the peaks or valleys of the undulating structure at the top of the annular wall surface 37, the water repellent effect can be improved. Can not.

第３実施形態によるバランスホールを有する排水羽根車３０を作動させる際、複数の補助ブレード３４は撥水効果を生じる。複数のバランスホール３５１は複数の補助ブレード３４の下方にも配置されるため、気泡を効果的に排出することができる。 When operating the drainage impeller 30 having the balance hole according to the third embodiment, the plurality of auxiliary blades 34 produce a water-repellent effect. Since the plurality of balance holes 351 are also arranged below the plurality of auxiliary blades 34, air bubbles can be effectively discharged.

図９に示すように、第３実施形態において、複数のバランスホール３５１’は複数の補助ブレード３４’の下方に配置されず、複数のメインブレード３２’および複数のサブブレード３３’の下方に配置されるため、複数の補助ブレード３４’の後方の気泡は複数のメインブレード３２’および複数のサブブレード３３’の下方の複数のバランスホール３５１’によって流出するしかない。詳しく言えば、全体構造は効果が落ちても気泡排出効果を維持できる。 As shown in FIG. 9, in the third embodiment, the plurality of balance holes 351'are not arranged below the plurality of auxiliary blades 34', but are arranged below the plurality of main blades 32'and the plurality of sub blades 33'. Therefore, the air bubbles behind the plurality of auxiliary blades 34'have only flow out through the plurality of balance holes 351'below the plurality of main blades 32' and the plurality of sub blades 33'. More specifically, the overall structure can maintain the bubble discharge effect even if the effect is reduced.

第３実施形態のほかの構造および達成できる効果は第２実施形態と同じであるため、詳細な説明を省略する。 Since the other structures of the third embodiment and the effects that can be achieved are the same as those of the second embodiment, detailed description thereof will be omitted.

（第４実施形態）
図１０および図１１に示したのは本発明の第４実施形態によるバランスホールを有する排水羽根車４０である。第３実施形態との違いは次のとおりである。 (Fourth Embodiment)
10 and 11 show a drainage impeller 40 having a balance hole according to the fourth embodiment of the present invention. The differences from the third embodiment are as follows.

複数の補助ブレード４４は環状壁面４７と一定の距離を保ち、下方または後方にバランスホール４５１が配置されない。 The plurality of auxiliary blades 44 keep a certain distance from the annular wall surface 47, and the balance hole 451 is not arranged below or behind.

第４実施形態によるバランスホールを有する排水羽根車４０を作動させる際、複数の補助ブレード４４は環状壁面４７と一定の距離を保つため、水中の気泡は複数の補助ブレード４４の後方に残留せず、遠心力によって環状壁面４７の内壁面に沿って移動する。つまり、複数の補助ブレード４４は気泡を残留させず、撥水効果を発揮することができる。一方、複数の補助ブレード４４は下方または後方にバランスホール４５１が配置されないため、水中の気泡は複数のメインブレード４２および複数のサブブレード４３の下方の複数のバランスホール４５１によって排出される。 When operating the drainage impeller 40 having the balance hole according to the fourth embodiment, since the plurality of auxiliary blades 44 maintain a certain distance from the annular wall surface 47, air bubbles in the water do not remain behind the plurality of auxiliary blades 44. , Moves along the inner wall surface of the annular wall surface 47 by centrifugal force. That is, the plurality of auxiliary blades 44 do not leave air bubbles and can exhibit a water-repellent effect. On the other hand, since the balance holes 451 are not arranged below or behind the plurality of auxiliary blades 44, air bubbles in the water are discharged by the plurality of balance holes 451 below the plurality of main blades 42 and the plurality of sub blades 43.

第４実施形態のほかの構造および達成できる効果は第３実施形態と同じであるため、詳細な説明を省略する。 Since the other structures of the fourth embodiment and the achievable effects are the same as those of the third embodiment, detailed description thereof will be omitted.

（第５実施形態）
図１２および図１３に示したのは本発明の第５実施形態によるバランスホールを有する排水羽根車５０である。第４実施形態との違いは次のとおりである。 (Fifth Embodiment)
12 and 13 show a drainage impeller 50 having a balance hole according to the fifth embodiment of the present invention. The differences from the fourth embodiment are as follows.

第５実施形態において、複数のメインブレード５２および複数のサブブレード５３の連結位置は波状の環状壁面５７の頂部の起伏構造の山部にある。複数の補助ブレード５４の仮想延長線ＶＬは波状の環状壁面５７の頂部の起伏構造の谷部と交差する。複数のメインブレード５２および複数のサブブレード５３は頂部の高さが同じである。複数の補助ブレード５４の頂部は複数のメインブレード５２および複数のサブブレード５３の頂部より低い。つまり、複数の補助ブレード５４の高さは複数のメインブレード５２および複数のサブブレード５３の高さとは異なる。波状の環状壁面５７の頂部の起伏構造の山部および谷部に応じて複数の補助ブレード５４の高さを複数のメインブレード５２および複数のサブブレード５３の高さと一致させないように設計する方式によって、回転中の排水羽根車５０に良好な撥水効果を発揮させることができる。 In the fifth embodiment, the connecting positions of the plurality of main blades 52 and the plurality of sub blades 53 are located at the peaks of the undulating structure at the top of the wavy annular wall surface 57. The virtual extension lines VL of the plurality of auxiliary blades 54 intersect the valleys of the undulating structure at the top of the wavy annular wall surface 57. The plurality of main blades 52 and the plurality of sub blades 53 have the same height at the top. The tops of the plurality of auxiliary blades 54 are lower than the tops of the plurality of main blades 52 and the plurality of sub blades 53. That is, the height of the plurality of auxiliary blades 54 is different from the height of the plurality of main blades 52 and the plurality of sub blades 53. By a method designed so that the heights of the plurality of auxiliary blades 54 do not match the heights of the plurality of main blades 52 and the plurality of sub blades 53 according to the peaks and valleys of the undulating structure at the top of the wavy annular wall surface 57. , The rotating drainage impeller 50 can exert a good water-repellent effect.

第５実施形態のほかの構造および達成できる効果は第４実施形態と同じであるため、詳細な説明を省略する。 Since the other structures of the fifth embodiment and the achievable effects are the same as those of the fourth embodiment, detailed description thereof will be omitted.

（第６実施形態）
図１４および図１５に示したのは本発明の第６実施形態によるバランスホールを有する排水羽根車６０である。第５実施形態との違いは次のとおりである。 (Sixth Embodiment)
14 and 15 show a drainage impeller 60 having a balance hole according to a sixth embodiment of the present invention. The differences from the fifth embodiment are as follows.

第６実施形態において、複数のメインブレード６２は環状壁面６７に一定の距離を置いて間隙６２１を形成する。複数のサブブレード６３は環状壁面６７に一定の距離を置いて間隙６３１を形成する。環状底板６５は複数の間隙６２１内に位置するバランスホール６５１と、複数の間隙６３１内に位置するバランスホール６５１とを有する。複数の間隙６２１内のバランスホール６５１はそれぞれメインブレード６２の仮想延長線ＶＬの下方に位置付けられる。複数の間隙６３１内のバランスホール６５１はそれぞれサブブレード６３の仮想延長線ＶＬの下方に位置付けられる。 In the sixth embodiment, the plurality of main blades 62 form a gap 621 at a certain distance from the annular wall surface 67. The plurality of sub blades 63 form a gap 631 at a certain distance from the annular wall surface 67. The annular bottom plate 65 has a balance hole 651 located in the plurality of gaps 621 and a balance hole 651 located in the plurality of gaps 631. Each of the balance holes 651 in the plurality of gaps 621 is positioned below the virtual extension line VL of the main blade 62. Each of the balance holes 651 in the plurality of gaps 631 is positioned below the virtual extension line VL of the sub blade 63.

第６実施形態によるバランスホールを有する排水羽根車６０を作動させる際、複数のメインブレード６２、複数のサブブレード６３および複数の補助ブレード６４は環状壁面６７と一定の距離を保つため、水中の気泡はメインブレード６２、サブブレード６３および補助ブレード６４の後方に残留せず、遠心力によって環状壁面６７の内壁面に沿って複数のバランスホール６５１の上方まで移動する。続いて複数のバランスホール６５１の上方まで移動した水中の気泡は水圧によって複数のバランスホール６５１から下方へ排出される。 When operating the drainage impeller 60 having the balance hole according to the sixth embodiment, the plurality of main blades 62, the plurality of sub blades 63, and the plurality of auxiliary blades 64 maintain a constant distance from the annular wall surface 67, so that air bubbles in the water are generated. Does not remain behind the main blade 62, the sub blade 63, and the auxiliary blade 64, and moves above the plurality of balance holes 651 along the inner wall surface of the annular wall surface 67 by centrifugal force. Subsequently, air bubbles in the water that have moved above the plurality of balance holes 651 are discharged downward from the plurality of balance holes 651 by water pressure.

第６実施形態のほかの構造および達成できる効果は第５実施形態と同じであるため、詳細な説明を省略する。 Since the other structures of the sixth embodiment and the achievable effects are the same as those of the fifth embodiment, detailed description thereof will be omitted.

上述した実施形態において、環状壁面は起伏して波状を呈するが、これに限らず、水平を保つように配置されてもよい。図１６および図１７に示すように、排水羽根車７０において、環状壁面７７の底部および頂部は起伏せず水平を保つように形成され、波状の起伏構造によって撥水効果を向上させるような設計とは異なるが、撥水効果に影響を与えることはあまりない。
詳しく言えば、排水羽根車７０を作動させる際、撥水効果は波状の起伏構造でなく、複数のメインブレード７２、複数のサブブレード７３および複数の補助ブレード７４によって生じるものであるため、環状壁面７７の底部および頂部は水平を保つように形成されても、撥水効果を降下させることはあまりない。気泡は複数のバランスホール７５１から排出される。 In the above-described embodiment, the annular wall surface is undulating and wavy, but the present invention is not limited to this, and the annular wall surface may be arranged so as to be horizontal. As shown in FIGS. 16 and 17, in the drainage impeller 70, the bottom and top of the annular wall surface 77 are formed so as to be horizontal without undulations, and the design is such that the water-repellent effect is improved by the wavy undulation structure. Is different, but it does not significantly affect the water repellent effect.
More specifically, when operating the drainage impeller 70, the water-repellent effect is caused by a plurality of main blades 72, a plurality of sub blades 73, and a plurality of auxiliary blades 74 rather than a wavy undulating structure. Even if the bottom and top of 77 are formed to remain horizontal, they do not significantly reduce the water repellent effect. Bubbles are discharged from a plurality of balance holes 751.

１０、２０、３０、４０、５０、６０、７０バランスホールを有する排水羽根車
１１、２１、３１軸心
１１１連結溝
１２、２２、３２、３２’、４２、５２、６２、７２メインブレード
２３、３３、３３’、４３、５３、６３、７３サブブレード
３４、３４’、４４、５４、６４、７４補助ブレード
６２１、６３１間隙
１５、２５、３５、６５環状底板
１５１、２５１、３５１、３５１’、４５１、６５１、７５１バランスホール
１６、２６、３６空洞部
１７、２７、３７、４７、５７、６７、７７環状壁面
９１モーター
９２駆動軸
９５集水槽
９６排水口
ＶＬ仮想延長線 10, 20, 30, 40, 50, 60, 70 Drainage impellers with balance holes 11, 21, 31 Axial center 111 Connecting grooves 12, 22, 32, 32', 42, 52, 62, 72 Main blades 23, 33, 33', 43, 53, 63, 73 Sub blades 34, 34', 44, 54, 64, 74 Auxiliary blades 621, 631 Gap 15, 25, 35, 65 Circular bottom plate 151, 251, 351, 351', 451, 651, 751 Balance holes 16, 26, 36 Cavities 17, 27, 37, 47, 57, 67, 77 Circular wall surface 91 Motor 92 Drive shaft 95 Water collection tank 96 Drain port VL Virtual extension line

Claims

Equipped with a shaft center, annular bottom plate and annular wall surface,
The axis has a connecting groove and a plurality of main blades.
The connecting groove is formed at the tip of the shaft center, and the drive shaft is fitted into the connecting groove to rotate the shaft center.
A plurality of said main blade is formed to extend to the outside along the radial direction of the axis, an imaginary line formed along the stretching direction is defined as a virtual prolongation line,
The annular bottom plate is arranged at the bottoms of the plurality of main blades, and forms a plurality of cavities between the axis, the plurality of main blades, and the annular bottom plate at a certain distance from the axis.
The bottom of the annular wall surface is located at the outer peripheral edge of the annular bottom plate.
The annular bottom plate has a plurality of balance holes penetrating the annular bottom plate.
The plurality of balance holes are arranged near the annular wall surface, and the distance between the hole edge portion and the annular wall surface is 1 mm or less.
The axis rotates with the plurality of main blades,
The plurality of balance holes are not disposed in front of flipping direction of the virtual prolongation line of the plurality of the main blades, positioned flipping direction of the rear of the lower or the virtual extension line of the plurality of the main blades, and Connected to the space behind the multiple main blades,
When the plurality of balance holes are arranged one by one behind the main blade, the distance between the hole edge portion of the balance hole and the main blade is 1 mm or less.
The central portion of the balance hole is far from one main blade and close to another main blade.
A drainage impeller with a balance hole.

The drainage impeller having a balance hole according to claim 1, wherein the plurality of main blades are connected to the annular wall surface.

The first aspect of the present invention, wherein the plurality of main blades form a plurality of gaps at a certain distance between the end portion and the annular wall surface, and the plurality of the balance holes are respectively located in the gaps. Drainage impeller with a balance hole.

The bottom surface of the annular bottom plate is undulating along the outer circumference of the annular bottom plate to be wavy, and the annular wall surface is undulating along with the annular bottom plate having a wavy bottom, and the top is undulating and wavy. The drainage impeller having a balance hole according to claim 1, wherein if the bottom portion is high, the top portion is also high, and if the bottom portion is low, the top portion is also low.

The drainage impeller having a balance hole according to claim 4, wherein the virtual extension lines of the plurality of main blades intersect with a mountain portion of the undulating structure of the top of the annular wall surface in a wavy shape.

The drainage impeller having a balance hole according to claim 4, wherein the virtual extension lines of the plurality of main blades intersect with a valley portion of an undulating structure at the top of the annular wall surface in a wavy shape.

Wherein said bottom and top of the annular wall, the drainage impeller with balance holes according to claim 1, characterized in that it is formed so as to keep the horizontal without undulations.

The balance hole according to claim 1, wherein the height of the tops of the plurality of main blades is the same as the height of the tops of the annular wall surface intersecting the virtual extension line of the main blades. Drainage impeller.

The drainage impeller having a balance hole according to claim 1, wherein the tops of the plurality of main blades are lower than the tops of the annular wall surface intersecting the virtual extension line of the main blade.

The balance according to claim 1, wherein when the plurality of balance holes are arranged one by one behind the main blade, the hole edge portion of the balance hole comes into contact with the rear side surface of the main blade. Drainage impeller with holes.

Further, a plurality of sub blades are provided, and the plurality of the sub blades are arranged on the top surface of the annular bottom plate, extend radially along the radial direction of the axis, and maintain a constant distance without contacting the axis. The plurality of the sub-blades do not extend to the plurality of the cavities, the virtual line formed along the extending direction is defined as a virtual extension line, the axis is rotated together with the plurality of the sub-blades, and the plurality of the above The sub blade has a plurality of balance holes downward or behind the virtual extension line in the rotation direction, and the plurality of balance holes are not arranged in front of the plurality of sub blades in the rotation direction of the virtual extension line. When a plurality of the balance holes are arranged one by one behind the sub blades connected to the space behind the sub blades, the distance between the hole edge of the balance holes and the sub blades is 1 mm. The balance hole according to claim 1, wherein the central portion of the balance hole is far away from one sub-blade or one main blade and close to another sub-blade. Drain impeller.

The drainage impeller having a balance hole according to claim 11, wherein the plurality of sub blades are connected to the annular wall surface.

The drainage impeller having a balance hole according to claim 11, wherein the plurality of main blades are connected to the annular wall surface.

The eleventh aspect of claim 11, wherein the plurality of sub-blades form a plurality of gaps at a certain distance from the annular wall surface, and the annular bottom plate has the balance holes at a portion located in the plurality of gaps. Drainage impeller with the described balance hole.

The eleventh aspect of claim 11, wherein the plurality of main blades form a plurality of gaps at a certain distance between the end portion and the annular wall surface, and the plurality of the balance holes are respectively located in the gaps. Drainage impeller with a balance hole.

The bottom surface of the annular bottom plate is undulating along the outer circumference of the annular bottom plate to be wavy, and the annular wall surface is undulating along with the annular bottom plate having a wavy bottom, and the top is undulating and wavy. The drainage impeller having a balance hole according to claim 11, wherein if the bottom portion is high, the top portion is also high, and if the bottom portion is low, the top portion is also low.

The drainage impeller having a balance hole according to claim 16, wherein the virtual extension lines of the plurality of main blades intersect with a mountain portion of the undulating structure of the top of the annular wall surface in a wavy shape.

The drainage impeller having a balance hole according to claim 16, wherein the virtual extension lines of the plurality of sub blades intersect with a mountain portion of the undulating structure of the top of the annular wall surface in a wavy shape.

The drainage impeller having a balance hole according to claim 16, wherein the virtual extension line of the plurality of main blades intersects a valley portion of the undulating structure of the top of the annular wall surface in a wavy shape.

The drainage impeller having a balance hole according to claim 16, wherein the virtual extension line of the plurality of sub blades intersects a valley portion of the undulating structure of the top of the annular wall surface in a wavy shape.

Wherein said bottom and top of the annular wall, the drainage impeller with balance holes according to claim 11, characterized in that it is formed so as to keep the horizontal without undulations.

The balance hole according to claim 11, wherein the height of the tops of the plurality of main blades is the same as the height of the tops of the annular wall surface intersecting the virtual extension line of the main blades. Drainage impeller.

The balance hole according to claim 11, wherein the height of the tops of the plurality of sub-blades is the same as the height of the tops of the annular wall surface intersecting the virtual extension line of the sub-blades. Drainage impeller.

The drainage impeller having a balance hole according to claim 11, wherein the tops of the plurality of main blades are lower than the tops of the annular wall surface that intersects the virtual extension line of the main blade.

The drainage impeller having a balance hole according to claim 11, wherein the tops of the plurality of sub-blades are lower than the tops of the annular wall surface intersecting the virtual extension line of the sub-blades.

11. The balance according to claim 11, wherein when the plurality of balance holes are arranged one by one behind the sub blade, the hole edge portion of the balance hole comes into contact with the rear side surface of the sub blade. Drainage impeller with holes.

11. The balance according to claim 11, wherein when the plurality of balance holes are arranged one by one behind the main blade, the hole edge portion of the balance hole contacts the rear side surface of the main blade. Drainage impeller with holes.

The drainage impeller having a balance hole according to claim 11, wherein the plurality of main blades and the plurality of sub blades have the same height at the top.

Further, a plurality of auxiliary blades are provided, the plurality of the auxiliary blades are shorter than the plurality of the sub-blades, are arranged on the top surface of the annular bottom plate, and are not in contact with the axis and are kept at a certain distance from the axis. 11. A feature of claim 11, wherein the plurality of auxiliary blades extend radially along the radial direction, the plurality of auxiliary blades do not extend to the plurality of the cavity portions, and a virtual line formed along the extending direction is defined as a virtual extension line. Drainage impeller with the described balance hole.

The drainage impeller having a balance hole according to claim 29, wherein the plurality of auxiliary blades are connected to the annular wall surface.

The drainage impeller having a balance hole according to claim 29, wherein the plurality of auxiliary blades are placed at a certain distance from the annular wall surface.

The axis rotates with the plurality of auxiliary blades, the plurality of the auxiliary blades have a plurality of balance holes downward or rearward, and the plurality of the balance holes are not arranged in front of the plurality of the auxiliary blades, and the plurality of balance holes When a plurality of the balance holes are arranged one by one behind the auxiliary blades connected to the space behind the auxiliary blades, the distance between the hole edge portion of the balance holes and the auxiliary blades is 1 mm. The drainage impeller having a balance hole according to claim 29, wherein the drainage impeller has the following.

29. The plurality of main blades and the plurality of sub blades have the same top height, and the plurality of auxiliary blades and the plurality of main blades have the same top height. Drainage impeller with the described balance hole.

29. The aspect 29, wherein the plurality of main blades and the plurality of sub blades have the same top height, and the plurality of auxiliary blades and the plurality of main blades do not have the same top height. Drainage impeller with a balance hole.

The virtual extension lines of the plurality of main blades and the virtual extension lines of the plurality of sub blades intersect the mountainous portion of the undulating structure at the top of the corrugated annular wall surface, and the virtual extension lines of the plurality of auxiliary blades. The drainage impeller having a balance hole according to claim 29, wherein the line intersects a valley portion of the undulating structure of the top of the annular wall surface in a wavy shape.

The virtual extension lines of the plurality of main blades and the virtual extension lines of the plurality of sub blades intersect the valleys of the undulating structure at the top of the corrugated annular wall surface, and the virtual extensions of the plurality of auxiliary blades. The drainage impeller having a balance hole according to claim 29, wherein the line intersects a mountain portion of the undulating structure of the top of the annular wall surface in a wavy shape.