EP1403521A1 - Pumpe mit einem Einlass und zwei Auslässen - Google Patents

Pumpe mit einem Einlass und zwei Auslässen Download PDF

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Publication number
EP1403521A1
EP1403521A1 EP20030021749 EP03021749A EP1403521A1 EP 1403521 A1 EP1403521 A1 EP 1403521A1 EP 20030021749 EP20030021749 EP 20030021749 EP 03021749 A EP03021749 A EP 03021749A EP 1403521 A1 EP1403521 A1 EP 1403521A1
Authority
EP
European Patent Office
Prior art keywords
outlets
impeller
pump
valve
switch valve
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.)
Granted
Application number
EP20030021749
Other languages
English (en)
French (fr)
Other versions
EP1403521B1 (de
Inventor
Kishimoto Hirokazu
Sadakane Kouichi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nidec Shibaura Corp
Original Assignee
Nidec Shibaura Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nidec Shibaura Corp filed Critical Nidec Shibaura Corp
Publication of EP1403521A1 publication Critical patent/EP1403521A1/de
Application granted granted Critical
Publication of EP1403521B1 publication Critical patent/EP1403521B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
    • F04D15/0016—Control, e.g. regulation, of pumps, pumping installations or systems by using valves mixing-reversing- or deviation valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
    • F04D29/48—Fluid-guiding means, e.g. diffusers adjustable for unidirectional fluid flow in reversible pumps
    • F04D29/486—Fluid-guiding means, e.g. diffusers adjustable for unidirectional fluid flow in reversible pumps especially adapted for liquid pumps

Definitions

  • the present invention relates to a pump that is used in a dishwasher or other machines handling liquid.
  • the present invention relates to a pump that has one inlet and two outlets communicating a pump chamber, and delivers fluid from one of the two outlets in accordance with a rotation direction of an impeller that is placed in the pump chamber.
  • a pump that is used in a dishwasher is required to have a function of supplying washing water into a dishwashing bath and a function of draining waste water after dishwashing.
  • a dishwasher having one pump that has the two functions, in which a pump motor is switched between forward rotation and reverse rotation, so that a transportation path of fluid using the pump is switched between a washing water supplying pipe and a waste water draining pipe.
  • This type of pump is disclosed in Japanese unexamined patent publication No. 10-43121, as shown in Fig. 7, for example.
  • This pump has two outlets 112, 114 including the washing water outlet and the waste water outlet in a pump casing 101 that houses an impeller 103 that is rotated by a motor 105.
  • the pump also has one inlet 106 that is common to the two outlets.
  • the pump further has a switching valve device 115 for opening and closing one of the washing water outlet and the waste water outlet selectively.
  • This switching valve device 115 includes a slidable valve plate 104 that closes the waste water outlet when opening the washing water outlet, while opens the waste water outlet when closing the washing water outlet.
  • This valve plate is provided with a forward flow pressure receiving surface 119 for receiving water flow when the motor rotates forwardly and a reverse flow pressure receiving surface 121 for receiving water flow when the motor rotates reversely.
  • the forward flow pressure receiving surface 119 of the valve plate 104 is pressed by water flow from the impeller so that the valve plate slides. Then, one of the washing water outlet and the waste water outlet is closed while the other is opened.
  • the action opposite to the above-explained action is performed.
  • An object of the present invention is to provide a pump that has one inlet and two outlets for delivering fluid from one of the two outlets in accordance with an operation direction of a pump motor, i.e., forward rotation or reverse rotation and that can switch one of the two outlets securely and smoothly.
  • Another object of the present invention is to provide a pump in which a structure of a switch valve for opening one of the two outlets and closing the other can be simplified.
  • Still another object of the present invention is to provide a pump having high reliability with a stable switching operation of the two outlets.
  • Figs. 1-4 are plan views showing a pump chamber 10 of a pump 1 according to this embodiment.
  • Fig. 1 shows a pump stop state.
  • Fig. 2 shows a start of a pump forward operation.
  • Fig. 3 shows a pump forward operation.
  • Fig. 4 shows a pump reverse operation.
  • the pump 1 includes a pump casing 11 that defines the pump chamber 10 and a reversible motor M that is placed below the pump casing 11.
  • the casing 11 comprises a circumference wall portion 11-1 having a cylindrical shape, a part of which is swelled in the circumferential direction, an upper wall portion (not shown) that closes an upper face opening of the circumference wall portion 11-1 and a lower wall portion 11-2 that closes an lower face opening of the circumference wall portion 11-1.
  • a rotation shaft 14 of the motor M passes through the lower wall portion 11-2 of the casing 11 substantially at the middle portion and is led into the pump chamber 10.
  • the pump chamber 10 houses an impeller 15 having a plurality of vanes 16 substantially in a radial manner.
  • the distal end of the rotation shaft 14 that is led into the pump chamber 10 is linked to the rotation center of the impeller 15, so that the motor M can rotate the impeller 15.
  • the impeller 15 is arranged coaxially with a cylindrical wall portion of the circumference wall portion 11-1. Between the impeller 15 and the swelled portion of the circumference wall portion 11-1, there is a space larger than that between the impeller 15 and the cylindrical wall portion.
  • the swelled portion of the circumference wall portion 11-1 of the casing 11 is provided with a first outlet 12 and a second outlet 13 arranged in parallel and opening to the pump chamber 10.
  • the position of the upper wall portion of the casing 11 corresponding to the impeller 15 is provided with an inlet 18 (shown by a dot-dashed line).
  • the rotation shaft 14 of the motor (M) is located on a pump center line (L) that passes the center of the two outlets 12 and 13 and the center of the pump chamber, and substantially at the center of the pump chamber 10.
  • a channel 40 is formed between the rim of the impeller 15 and the circumference wall of the casing 11.
  • a switch valve 2 for closing one of the first outlet 12 and the second outlet 13 and opening the other is provided between the rim of the impeller 15 and each of the two outlets 12 and 13 in the pump chamber 10, i.e., in the above-mentioned relatively large space.
  • This switch valve 2 includes a sector valve element 20 having an arc circumference surface 21 and valve lid portions 24 and 25 that are arranged at both end surfaces 22 and 23 of the arc circumference surface 21 of the valve element 20.
  • a pivot shaft 26 is provided at the cross line between two end surfaces of the sector and is disposed on the pump center line (L) in a rotative manner.
  • the sector valve element 20 can swing along with the arc circumference surface 21 facing the impeller 15. Regardless of a rotation position of the valve element 20, a distance (D) is constantly maintained between the arc circumference surface 21 and the rim of the impeller 15.
  • valve lid portion 24 disposed at the end surface 22 of the sector valve element 20 faces the first outlet 12, while the valve lid portion 25 disposed at the end surface 23 faces the second outlet 13.
  • the valve lid portion 24 and the valve lid portion 25 close the first outlet 12 and the second outlet 13, respectively.
  • the sector shape of the valve element 20 is set so that the valve lid portion 25 opens the second outlet 13 largely when the valve lid portion 24 closes the first outlet 12, while the valve lid portion 24 opens the first outlet 12 largely when the valve lid portion 25 closes the second outlet 13.
  • the pump 1 having the above-mentioned structure works as follows.
  • the impeller 15 is driven by the motor (M) and rotates, fluid is sucked into the pump chamber 10 through the inlet 18.
  • a spiral flow of the fluid is generated in the channel 40 in the forward or reverse rotation direction, when the fluid flows in the pump chamber 10.
  • the motor (M) rotates the impeller 15 in the clockwise direction as shown by the arrow al.
  • a part 42 of the fluid 41 flowing in the pump chamber 10 flows into the space between the circumference surface 21 of the switch valve 2 and the impeller 15.
  • the arc circumference surface 21 receives the fluid 42, and viscosity of the fluid 42 generates a torque, which is transmitted to the entire of the switch valve 2.
  • the switch valve 2 is swinged around the pivot shaft 26 as shown by the arrow b1 in the direction of closing the second outlet 13. In this operation, the channel 43 to the first outlet 12 is gradually opened, and it starts to deliver the fluid 41 through the outlet 12.
  • the switch valve 2 closes the second outlet 13 completely by the valve lid portion 25 as shown in Fig. 3.
  • the major portion 44 of the fluid 41 flowing in the pump chamber 10 is delivered from the pump chamber 10 through the first outlet 12. Since a partial flow 45 of the fluid 41 flows into the space between the circumference surface 21 of the switch valve and the impeller 15, the torque is generated continuously.
  • the switch valve 2 keeps the sate where the outlet 13 is closed, so that the delivering operation is performed only through the first outlet 12.
  • the distance (D) between the arc circumference surface 21 and the rim of the impeller 15 can be a small gap that is sufficient for the fluid turning in the pump chamber 10 to flow into the space between them so as to generate a torque of the fluid. Therefore, when the switch valve 2 closes the channel to the second outlet 13 almost completely in the forward operation, quantity of flow in the direction to the outlet 13 can be controlled to a minimum value necessary for generating the above-mentioned torque, so that quantity of delivering flow through the first outlet 12 can be secured and the delivering efficiency can be improved.
  • the switch valve 2 becomes the state leaning to the second outlet 13 side as shown in Fig. 3. In this case, it is possible to apply a force to the switch valve 2 to be always in the state as shown in Fig. 1.
  • the switch valve 2 will fall to the position as shown in Fig. 1 due to a weight thereof when the operation is stopped.
  • D certain distance
  • the switch valve 2 When the pump 1 is in the reverse operation, the switch valve 2 performs the action as shown in Fig. 4, in the direction opposite to the case of Fig. 2 or 3.
  • the switch valve 2 closes the first outlet 12, and fluid 46 in the pump chamber 10 is delivered only through the second outlet 13.
  • the above-explained switch valve 2 is made of a resin or a metal such as an aluminum alloy.
  • the valve lid portions 24 and 25 can be made of an elastomer material such as a rubber or a urethane, though they are preferably light to be easily moved by fluid.
  • a torque due to viscosity of fluid that is generated between the arc circumference surface 21 of the switch valve 2 and the impeller 16 is utilized for operating the switch valve 2 having a simple structure with a sector valve element 20. Accordingly, a pump can be realized that has little possibility of trouble such as a malfunction or an operational error of the switch valve 2.
  • one of the outlets is closed while fluid is delivered only through the other outlet, so that high reliability can be realized.
  • switch valve since the structure and the principle of operational of switch valve are simple, a complicated structure as the conventional one is not required. Since electric means such as a solenoid valve are not required, the structure of the pump itself can be simplified, so that cost reduction of the pump can be realized.
  • the arc circumference surface 21 of the switch valve 2 can be processed by machine on the surface, e.g., projections and depressions of a stripe pattern as shown in Fig. 5 can be formed.
  • This uneven portion 27 of the circumference surface 21 enhances friction with fluid so as to receive the fluid easily and to generate a torque easily due to viscosity of the fluid.
  • the operation of the switch valve 2 can be secured and performed smoothly.
  • This uneven portion 27 can be formed by a knurl process if the circumference surface 21 is made of a metal, for example.
  • the uneven portion 27 can be formed by injection modeling.
  • the uneven portion 28 is formed to have plural steps, it is preferable to form the uneven portion 28 like a hound's tooth check as shown in Fig. 6.
  • distribution of the viscosity torque of the fluid that is generated on the arc circumference surface 21 can be equalized, the operation of the switch valve 2 can be stabilized, and switching between opening and closing of the outlet can be performed more smoothly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP03021749A 2002-09-26 2003-09-25 Pumpe mit einem Einlass und zwei Auslässen Expired - Lifetime EP1403521B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002282002A JP4313557B2 (ja) 2002-09-26 2002-09-26 ポンプ
JP2002282002 2002-09-26

Publications (2)

Publication Number Publication Date
EP1403521A1 true EP1403521A1 (de) 2004-03-31
EP1403521B1 EP1403521B1 (de) 2006-04-19

Family

ID=31973323

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03021749A Expired - Lifetime EP1403521B1 (de) 2002-09-26 2003-09-25 Pumpe mit einem Einlass und zwei Auslässen

Country Status (3)

Country Link
EP (1) EP1403521B1 (de)
JP (1) JP4313557B2 (de)
DE (1) DE60304648D1 (de)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103277340A (zh) * 2013-05-09 2013-09-04 江苏大学 一种用于透平泵的双向蜗壳及其使用方法
CN106050681A (zh) * 2016-08-02 2016-10-26 台州凌霄泵业有限公司 双出水口水泵
EP3156662A1 (de) * 2015-10-12 2017-04-19 Grundfos Holding A/S Pumpenaggregat und hydraulisches system
CN106958124A (zh) * 2015-10-02 2017-07-18 Lg电子株式会社 洗衣机
CN107620739A (zh) * 2017-10-12 2018-01-23 广州奥姆特机电设备制造有限公司 一种可切换双向流道的水泵座
CN107795517A (zh) * 2017-10-30 2018-03-13 明达实业(厦门)有限公司 一种具有多通道结构的气泵
WO2018054238A1 (zh) * 2016-09-26 2018-03-29 青岛海尔洗衣机有限公司 一种干衣机用正反转风扇及干衣机
CN108138799A (zh) * 2015-10-12 2018-06-08 格兰富控股联合股份公司 泵机组和液压系统
EP3376037A1 (de) * 2017-03-14 2018-09-19 Grundfos Holding A/S Kreiselpumpenaggregat
WO2019219361A1 (en) 2018-05-18 2019-11-21 Arcelik Anonim Sirketi A dual outlet pump
CN111608792A (zh) * 2020-04-14 2020-09-01 广西玉柴机器股份有限公司 一种增压器的冷却润滑系统
WO2023146627A1 (en) * 2022-01-27 2023-08-03 Cooper-Standard Automotive Inc. Pump with rotary valve
EP4375512A1 (de) * 2022-11-23 2024-05-29 Miele & Cie. KG Pumpvorrichtung, haushaltsgerät mit pumpvorrichtung und verfahren zum betreiben einer pumpvorrichtung
CN119103147A (zh) * 2024-09-14 2024-12-10 安徽新沪屏蔽泵有限责任公司 一种双联泵

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011149591A (ja) * 2010-01-20 2011-08-04 Toshiba Corp 給水装置及びそれを備えた冷蔵庫
AU2016234990B2 (en) 2015-10-02 2018-12-06 Lg Electronics Inc. Washing machine and method for controlling the same
US20170096769A1 (en) 2015-10-02 2017-04-06 Lg Electronics Inc. Method for controlling washing machine
US10167589B2 (en) 2015-10-02 2019-01-01 Lg Electronics Inc. Method for controlling rinsing cycle of washing machine
KR101671171B1 (ko) * 2016-09-26 2016-11-02 주식회사 두크 수중펌프용 회전날개 스트레이너 및 이를 포함하는 수중펌프
JP7602805B2 (ja) 2022-01-25 2024-12-19 株式会社不二工機 ポンプ

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB817802A (en) * 1954-11-12 1959-08-06 Gen Electric Improvements relating to centrifugal pumps, particularly suitable for clothes washing machines
DE3442907A1 (de) * 1984-11-24 1986-06-05 Robert Bosch Gmbh, 7000 Stuttgart Foerderaggregat mit einem in beiden drehrichtungen betreibbaren, als synchronmotor ausgebildeten elektrischen antriebsmotor
US4679983A (en) * 1983-05-11 1987-07-14 Ford Motor Company Water pump for window washer unit
DE4330507C1 (de) * 1993-09-09 1994-10-06 Grundfos As Klappenumschaltvorrichtung für die Druckseite einer Doppelpumpe
DE19745737A1 (de) * 1996-10-28 1998-05-07 Daewoo Electronics Co Ltd Warmwasser-Umwälzpumpe zum Liefern von Warmwasser selektiv durch ein Paar von Rohren
WO1999027836A1 (en) * 1997-12-03 1999-06-10 Samsung Electronics Co., Ltd Dishwasher capable of jetting and discharging water stored in a sump case using a single motor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB817802A (en) * 1954-11-12 1959-08-06 Gen Electric Improvements relating to centrifugal pumps, particularly suitable for clothes washing machines
US4679983A (en) * 1983-05-11 1987-07-14 Ford Motor Company Water pump for window washer unit
DE3442907A1 (de) * 1984-11-24 1986-06-05 Robert Bosch Gmbh, 7000 Stuttgart Foerderaggregat mit einem in beiden drehrichtungen betreibbaren, als synchronmotor ausgebildeten elektrischen antriebsmotor
DE4330507C1 (de) * 1993-09-09 1994-10-06 Grundfos As Klappenumschaltvorrichtung für die Druckseite einer Doppelpumpe
DE19745737A1 (de) * 1996-10-28 1998-05-07 Daewoo Electronics Co Ltd Warmwasser-Umwälzpumpe zum Liefern von Warmwasser selektiv durch ein Paar von Rohren
WO1999027836A1 (en) * 1997-12-03 1999-06-10 Samsung Electronics Co., Ltd Dishwasher capable of jetting and discharging water stored in a sump case using a single motor

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103277340B (zh) * 2013-05-09 2015-11-18 江苏大学 一种用于透平泵的双向蜗壳及其使用方法
CN103277340A (zh) * 2013-05-09 2013-09-04 江苏大学 一种用于透平泵的双向蜗壳及其使用方法
CN106958124A (zh) * 2015-10-02 2017-07-18 Lg电子株式会社 洗衣机
CN108138800A (zh) * 2015-10-12 2018-06-08 格兰富控股联合股份公司 泵机组和液压系统
CN108138799A (zh) * 2015-10-12 2018-06-08 格兰富控股联合股份公司 泵机组和液压系统
EP3156662A1 (de) * 2015-10-12 2017-04-19 Grundfos Holding A/S Pumpenaggregat und hydraulisches system
WO2017063969A1 (de) * 2015-10-12 2017-04-20 Grundfos Holding A/S Pumpenaggregat und hydraulisches system
CN106050681A (zh) * 2016-08-02 2016-10-26 台州凌霄泵业有限公司 双出水口水泵
WO2018054238A1 (zh) * 2016-09-26 2018-03-29 青岛海尔洗衣机有限公司 一种干衣机用正反转风扇及干衣机
WO2018167031A1 (de) * 2017-03-14 2018-09-20 Grundfos Holding A/S Kreiselpumpenaggregat
US11073161B2 (en) 2017-03-14 2021-07-27 Grundfos Holding A/S Centrifugal pump assembly
EP3376037A1 (de) * 2017-03-14 2018-09-19 Grundfos Holding A/S Kreiselpumpenaggregat
CN110418893B (zh) * 2017-03-14 2021-10-22 格兰富控股联合股份公司 离心泵机组
CN110418893A (zh) * 2017-03-14 2019-11-05 格兰富控股联合股份公司 离心泵机组
CN107620739A (zh) * 2017-10-12 2018-01-23 广州奥姆特机电设备制造有限公司 一种可切换双向流道的水泵座
CN107620739B (zh) * 2017-10-12 2024-04-09 广州奥姆特机电设备制造有限公司 一种可切换双向流道的水泵座
CN107795517A (zh) * 2017-10-30 2018-03-13 明达实业(厦门)有限公司 一种具有多通道结构的气泵
WO2019219361A1 (en) 2018-05-18 2019-11-21 Arcelik Anonim Sirketi A dual outlet pump
CN111608792A (zh) * 2020-04-14 2020-09-01 广西玉柴机器股份有限公司 一种增压器的冷却润滑系统
WO2023146627A1 (en) * 2022-01-27 2023-08-03 Cooper-Standard Automotive Inc. Pump with rotary valve
US11982279B2 (en) 2022-01-27 2024-05-14 Cooper-Standard Automotive Inc. Pump with rotary valve
EP4375512A1 (de) * 2022-11-23 2024-05-29 Miele & Cie. KG Pumpvorrichtung, haushaltsgerät mit pumpvorrichtung und verfahren zum betreiben einer pumpvorrichtung
CN119103147A (zh) * 2024-09-14 2024-12-10 安徽新沪屏蔽泵有限责任公司 一种双联泵

Also Published As

Publication number Publication date
JP4313557B2 (ja) 2009-08-12
DE60304648D1 (de) 2006-05-24
EP1403521B1 (de) 2006-04-19
JP2004116425A (ja) 2004-04-15

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