EP1024297A2 - Pompe de vidange - Google Patents

Pompe de vidange Download PDF

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Publication number
EP1024297A2
EP1024297A2 EP99118429A EP99118429A EP1024297A2 EP 1024297 A2 EP1024297 A2 EP 1024297A2 EP 99118429 A EP99118429 A EP 99118429A EP 99118429 A EP99118429 A EP 99118429A EP 1024297 A2 EP1024297 A2 EP 1024297A2
Authority
EP
European Patent Office
Prior art keywords
vanes
large radius
cylindrical wall
wall member
radius vanes
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
EP99118429A
Other languages
German (de)
English (en)
Other versions
EP1024297B1 (fr
EP1024297A3 (fr
Inventor
Tatushi c/o Fujikoki COrporation Ninomiya
Masayuki c/o Fujikoki Corporation Imai
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.)
Fujikoki Corp
Original Assignee
Fujikoki 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 Fujikoki Corp filed Critical Fujikoki Corp
Publication of EP1024297A2 publication Critical patent/EP1024297A2/fr
Publication of EP1024297A3 publication Critical patent/EP1024297A3/fr
Application granted granted Critical
Publication of EP1024297B1 publication Critical patent/EP1024297B1/fr
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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
    • 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
    • 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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2205—Conventional flow pattern
    • F04D29/2216—Shape, geometry
    • 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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/24—Vanes
    • F04D29/242—Geometry, shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/96—Preventing, counteracting or reducing vibration or noise

Definitions

  • the present invention relates to a drain pump, and in particular, to a drain pump equipped in an air conditioner.
  • a drain pump is equipped thereto in order to drain the water gathered in the drain vane.
  • the example of the prior art drain pump comprises a housing having a suction opening in the lower area, an opening in the upper area and a discharge opening in the side area, and a vane mounted rotatably inside the housing. The vane is rotated by a motor fixed through a cover to the upper area of the opening of the housing.
  • the rotary shaft of the motor is rotatably penetrated through the cover and connected to the shaft portion of the vane.
  • a penetrating hole communicating the housing and the atmospheric air is formed on the cover.
  • FIG. 12 is a partially cross-sectional front view showing the whole structure of the conventional drain pump.
  • the drain pump shown as a whole by the reference number 1 comprises a motor 10, and a pump body 30 mounted through a bracket 20 below the motor 10.
  • the bracket 20 is formed integrally with a cover 32 which constitutes the upper member of the pump housing.
  • the cover 32 is connected to a housing 40 through a seal member 34.
  • the housing 40 is made of plastic and comprises a suction opening 42, a pump chamber 44 and a discharge opening 46.
  • a rotary vane 50 equipped inside the housing 40 comprises a shaft portion 52, and a plurality of plate-shaped small radius vanes 54 protruded to the diametral direction with its center positioned at the center axis of the shaft portion 52.
  • the rotary vane comprises four small radius vanes 54.
  • the shaft portion 52 protrudes through a penetrating hole 36 formed in the center area of the cover 32 toward the motor 10.
  • a drive shaft 12 of the motor 10 is inserted to a hole formed on the shaft portion 52.
  • a cut-water disk plate 14 is mounted to the upper surface of the shaft portion 52, which prevents the drain water spouting out of the penetrating hole 36 from reaching the motor 10.
  • the small radius vanes 54 of the rotary vane 50 is inserted to a pipe-shaped suction opening 42 of the housing 40.
  • a suction end 43 of the suction opening 42 is formed to have a tapered surface which reduces the inner diameter of the opening toward the opening end.
  • the tip portion of the small radius vanes also include a tapered surface 56.
  • Large radius vanes 60 of the rotary vane 50 is stored inside the pump chamber 44 of the housing 40.
  • FIG. 13 is a side view of the rotary vane 50
  • FIG. 14 is a detailed view of portion B of FIG. 13
  • FIG. 15 is an upper view of the rotary vane 50
  • FIGS. 16 (A), (B) and (C) each show a portion of the cross-sectional view taken at lines A-A, B-B or C-C of FIG. 15.
  • the rotary vane 50 is equipped with a shaft portion 52, and plate-shaped large radius vanes 60 extending radially outward from the outer peripheral of the shaft portion 52.
  • the lower rim portions of the large radius vanes 60 are formed to have a tapered shape, and the lower rim portions are connected by a disk-shaped annular member 62 having a hollow portion 63.
  • Small radius vanes 54 are mounted under the large radius vanes 60.
  • the large radius vanes 60 and the small radius vanes 54 are integrally formed by resin, each having four plate-shaped vanes, but the number of vanes may be selected according to design.
  • Auxiliary vanes 68 are mounted between the large radius vanes 60.
  • the pump head may be raised by the auxiliary vanes.
  • a hole 53 for inserting the drive shaft of the motor is formed to the center of the shaft portion 52.
  • the tip portions of the small radius vanes 54 are formed to have a tapered surface 56.
  • the tilt angle of the tapered surface 56 is set, for example, to
  • a chamfer portion 57 having an arc shape toward the rotating direction is formed to the small radius vanes 54.
  • the arc-shaped chamfer portion 57 has a radius of curvature roughly equal to the thickness of the small radius vane.
  • the outer peripheral end of the auxiliary vanes 68 and the large radius vanes 60 are connected through a cylindrical wall member 64.
  • the cylindrical wall member 64 is formed so that its height is lower than the height to the upper rim portion of the large radius vanes 60 or the auxiliary vanes 68.
  • an arc-shaped chamfer 70 is formed to the inner side of the upper rim of the cylindrical wall member 64.
  • the drain pump when the drain pump is stopped, the water returning from the discharge opening 46 to the pump chamber 44 inside the casing bumps into the cylindrical wall member 64, and by the buffer action of the cylindrical wall member 64, the bubbles are diffused gradually, and the noise caused by the return water may also be reduced.
  • the arc-shaped chamfer portion 70 having a radius of curvature roughly equal to the thickness of the cylindrical wall member 64 is formed to the cylindrical wall member, the drain water provided of the energy to flow in the radial direction by the rotation of the large radius vanes 60 and the auxiliary vanes 68 will run smoothly over the upper rim portion of the cylindrical wall member 64, which also contributes to realizing low noise.
  • the lower end of the cylindrical wall member 64 is annually connected to an annular member 62 connecting the lower rim portions of the large radius vanes 60 and the auxiliary vanes 68.
  • annular member 62 connecting the lower rim portions of the large radius vanes 60 and the auxiliary vanes 68.
  • the cylindrical wall member 64 and the annular member 62 are integrally formed, but they may also be formed separately.
  • the inner peripheral side of the annular member 62 toward the center portion of the rotary vane is formed to have an opening 63.
  • the lower rim of the auxiliary vanes 68 and the large radius vanes 60 are formed to have an inclined shape toward the small radius vanes 64, and the annular member 62 is formed to have a dish-like shape corresponding to such inclination.
  • the noise generated when operating the drain pump may be reduced by setting the upper rim height of the cylindrical wall surface to be smaller than the upper rim height of the large radius vanes.
  • the noise generated when operating the drain pump may be reduced by setting the upper rim height of the cylindrical wall surface to be smaller than the upper rim height of the large radius vanes.
  • the drain pump comprises a rotary vane connected to a drive shaft of a motor, and a housing for storing said rotary vane, said rotary vane comprising a shaft portion connected to said drive shaft of the motor, a plurality of plate-shaped large radius vanes mounted on said shaft portion in the radial direction, a plurality of plate-shaped small radius vanes mounted under said large radius vanes in the axial direction, a disk-shaped annular member having a hollow portion connected to the lower rim portions of said large radius vanes, and a cylindrical wall member mounted to the outer rim portion of said disk-shaped annular member for connecting the outer peripheral rim portions of said large radius vanes, wherein the ratio of the height of said cylindrical wall member to the height of said large radius vanes is set in the range of 66% to 83%.
  • the drain pump according to the present invention further comprises an auxiliary vane formed on said disk-shaped annular member in the interior of said cylindrical wall member.
  • the drain pump according to the present invention sets the height of the cylindrical wall member to be in the range of 66% to 83% the height of the large radius vanes. This enables to effectively reduce the noise being generated when operating the drain pump.
  • FIG. 1 is a front view of one embodiment of the rotary vane of the drain pump
  • FIG. 2 is an upper view taken from the direction shown by arrow P of FIG. 1
  • FIG. 3 is a cross-sectional view taken at line A-A of FIG. 2
  • FIG. 4 is a cross-sectional view taken at line D-D of FIG. 2
  • FIG. 5 is a cross-sectional view taken at line G-G of FIG. 2
  • FIG. 6 is a cross-sectional view taken at line E-E of FIG. 4
  • FIG. 7 is a detailed view of area F shown in FIG. 1
  • FIG. 8 is a cross-sectional view taken at line H-H of FIG. 7.
  • the rotary vane 50 is formed by molding plastic, and includes a plural number of (for example, four) plate-shaped small radius vanes 410. The upper portion of the small radius vanes are connected through a tapered portion 411 to a plural number of (for example, four) large radius vanes 450.
  • a cylindrical shaft portion 420 is formed in the center area of the large radius vanes 450, and the shaft portion 420 comprises a hole 430 with a bottom in the center area thereof.
  • An output shaft of a motor (not shown in the drawing) is pressed into the hole 430 so as to transmit the rotary force of the motor to the rotary vane 50.
  • the lower rim portions of the large radius vanes 450 are covered by a disk-shaped annular member 460. At the center of the annular member 460 is formed an opening 462.
  • the outer peripheral rim of the disk-shaped annular member 460 is connected to a cylindrical wall member 470.
  • the wall member 470 is connected to the outer rim of the large radius vanes 450, and the upper rim 472 of the cylindrical wall member 470 is formed to be lower than the upper rim 451 of the large radius vanes 450.
  • auxiliary vanes 452 are mounted to the interior of the cylindrical wall member 470. Each auxiliary vane 452 is mounted between the four large radius vanes 450 so as to extend toward the direction of the opening 462 of the disk-shaped annular member 460. In the embodiment shown in FIG. 6, a rim portion 454 of the auxiliary vane facing the radially inward direction is formed to extend to a position near the opening 462 of the disk-shaped annular member 460.
  • the height position of the upper rim 453 of the auxiliary vanes 452 is set to correspond to the height position of the upper rim 451 of the large radius vanes 450.
  • the upper rim 451 of the large-radius vanes 450 and the upper rim 453 of the auxiliary vane 452 are positioned to be exposed above the upper rim 472 of the cylindrical wall member 470.
  • the exposed portion contributes to secure the maximum pump head of the rotary vane.
  • only either the large radius vanes or the auxiliary vanes may be positioned to expose its upper rim above the wall member 470.
  • FIGS. 7 and 8 show the shape of a tapered portion 412 formed on the bottom end of the small radius vane 410, and an arc-shaped chamfer 414 formed on the outer rim of the small radius vane 410.
  • vanes having the above-mentioned shape and structure which are rotatably mounted to the drain pump according to the present invention realize a light-weight rotating body. Accordingly, a drain pump having the minimum noise and vibration may be achieved.
  • FIG. 9 is an explanatory view showing one example of the size of the rotary vane 50.
  • the outer diameter of the rotary vane 50 may be selected to meet the required specifications of the drain pump.
  • the present embodiment utilizes a rotary vane having an outer diameter size of 35 mm.
  • the change in the noise level and the maximum pump head was examined when the height of the cylindrical wall member 470 was set to S, and the height of the large radius vanes 450 was set to T.
  • experiment on the noise and the maximum pump head characteristics was performed by fixing the height T of the large radius vanes 450 to 6.0/mm, and changing the height S of the cylindrical wall member 470 from 3.5 mm to 6.0 mm by a pitch of 0.5 mm.
  • FIG. 10 shows the experiment results performed under a rated voltage of 50 hertz
  • FIG. 11 shows the result under a rated voltage of 60 hertz.
  • the horizontal axis shows the S/T ratio
  • the vertical axis shows the noise (dB) and the no-discharge head (mm).
  • the noise characteristics measured at the time of discharge of the drain water maintaining a pump head of 700 mm (shown by a curve connecting the ⁇ mark in the drawing)and at the time the discharge of the drain water maintaining a pump head of 700 mm is terminated (shown by a curve connecting the ⁇ mark) is shown to be reduced when the S/T ratio is 4.0/6.0, while the no-discharge head characteristics shown by a curve connecting the X mark in the drawing is maintained at a high level.
  • Such noise characteristics is also maintained at a reduced level when the S/T ratio is 4.5/6.0 and 5.0/6.0, but the no-discharge head characteristics is lowered when the S/T ratio is 5.0/6.0.
  • FIG. 11 shows a similar chart as FIG. 10 where the no-discharge head characteristics and the noise characteristics are shown.
  • the experiment result shows that when the S/T ratio is 4.0/6.0, the no-discharge head (shown by the curve connecting the X mark in the drawing) maintains a high level, while the noise characteristics is reduced both at the time of discharge of the drain water maintaining a pump head of 700 mm (shown by the curve connecting the ⁇ mark in the drawing) and at the time the discharge is terminated (shown by the curve connecting the ⁇ mark).
  • the noise characteristics is maintained at such level when the S/T ratio is 4.5/6.0 and 5.0/6.0, but the no-discharge head is lowered when the S/T ratio is 5.0/6.0.
  • the noise characteristics of the drain pump may be improved without lowering the no-discharge head characteristics.
  • auxiliary vanes are formed to the rotary vane 50
  • the present invention may also be applied to the case where no auxiliary vanes are formed.
  • the present invention may be applied to the case where the upper rim portion of the large radius vanes or the auxiliary vanes explained above are not exposed from the upper rim of the cylindrical wall member.
  • the drain pump according to the present invention determines the range of the height of the cylindrical wall member against the height of the large radius vanes of the rotary vane, which effectively reduces the noise level while maintaining the no-discharge head.
  • the present drain pump capable of reducing noise effectively may be manufactured by a low cost.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)
EP99118429A 1999-01-27 1999-09-17 Pompe de vidange Expired - Lifetime EP1024297B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1809699 1999-01-27
JP01809699A JP4267118B2 (ja) 1999-01-27 1999-01-27 排水ポンプ

Publications (3)

Publication Number Publication Date
EP1024297A2 true EP1024297A2 (fr) 2000-08-02
EP1024297A3 EP1024297A3 (fr) 2000-10-11
EP1024297B1 EP1024297B1 (fr) 2002-03-06

Family

ID=11962109

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99118429A Expired - Lifetime EP1024297B1 (fr) 1999-01-27 1999-09-17 Pompe de vidange

Country Status (7)

Country Link
EP (1) EP1024297B1 (fr)
JP (1) JP4267118B2 (fr)
KR (1) KR100571591B1 (fr)
CN (1) CN1129717C (fr)
DE (1) DE69900972T2 (fr)
ES (1) ES2173693T3 (fr)
TW (1) TW405023B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1617084A1 (fr) * 2004-07-16 2006-01-18 Fujikoki Corporation Pompe de drainage
CN101614219B (zh) * 2008-06-23 2012-08-29 乐金电子(天津)电器有限公司 降低噪音的空调室内机的排水泵组件
EP2287470A3 (fr) * 2009-07-07 2015-08-19 Fujikoki Corporation Pompe de drainage

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002138992A (ja) * 2000-11-01 2002-05-17 Fuji Koki Corp 排水ポンプ
CN1788165B (zh) * 2003-12-05 2011-04-13 大金工业株式会社 排水泵及具有该排水泵的空气调节装置
JP2005282500A (ja) * 2004-03-30 2005-10-13 Toshiba Corp 流体ポンプ、冷却装置及電気機器
CN100363627C (zh) * 2004-11-17 2008-01-23 深圳市兴日生实业有限公司 一种自动按正确方向旋转的电动水泵
JP5658526B2 (ja) * 2010-10-08 2015-01-28 日本電産サンキョー株式会社 ドレンポンプ
JP6091066B2 (ja) * 2012-02-29 2017-03-08 日本電産サンキョー株式会社 ドレンポンプ
JP6001708B2 (ja) * 2015-02-26 2016-10-05 株式会社鷺宮製作所 ドレンポンプ
CN110056534B (zh) * 2019-05-14 2024-03-26 汉宇集团股份有限公司 一种叶轮及水泵
CN114087207A (zh) * 2020-08-24 2022-02-25 浙江三花商用制冷有限公司 一种流体排出装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0760428A1 (fr) * 1995-08-29 1997-03-05 Fujikoki Corporation Pompe de drainage

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4355954A (en) * 1980-07-18 1982-10-26 The Maytag Company Pump impeller
JPH1018999A (ja) * 1996-07-02 1998-01-20 Mitsubishi Heavy Ind Ltd ドレンポンプ
JP2846853B2 (ja) * 1996-07-16 1999-01-13 株式会社不二工機 液体排出ポンプ

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0760428A1 (fr) * 1995-08-29 1997-03-05 Fujikoki Corporation Pompe de drainage

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1617084A1 (fr) * 2004-07-16 2006-01-18 Fujikoki Corporation Pompe de drainage
CN101614219B (zh) * 2008-06-23 2012-08-29 乐金电子(天津)电器有限公司 降低噪音的空调室内机的排水泵组件
EP2287470A3 (fr) * 2009-07-07 2015-08-19 Fujikoki Corporation Pompe de drainage

Also Published As

Publication number Publication date
EP1024297B1 (fr) 2002-03-06
CN1129717C (zh) 2003-12-03
DE69900972T2 (de) 2002-11-21
KR100571591B1 (ko) 2006-04-17
TW405023B (en) 2000-09-11
JP4267118B2 (ja) 2009-05-27
KR20000052358A (ko) 2000-08-25
DE69900972D1 (de) 2002-04-11
ES2173693T3 (es) 2002-10-16
JP2000213769A (ja) 2000-08-02
CN1262393A (zh) 2000-08-09
EP1024297A3 (fr) 2000-10-11

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