EP1030063A2 - Entleerungspumpe - Google Patents

Entleerungspumpe Download PDF

Info

Publication number
EP1030063A2
EP1030063A2 EP99125699A EP99125699A EP1030063A2 EP 1030063 A2 EP1030063 A2 EP 1030063A2 EP 99125699 A EP99125699 A EP 99125699A EP 99125699 A EP99125699 A EP 99125699A EP 1030063 A2 EP1030063 A2 EP 1030063A2
Authority
EP
European Patent Office
Prior art keywords
motor
driving shaft
rotary vane
flange
housing
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
EP99125699A
Other languages
English (en)
French (fr)
Other versions
EP1030063A3 (de
EP1030063B1 (de
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 EP1030063A2 publication Critical patent/EP1030063A2/de
Publication of EP1030063A3 publication Critical patent/EP1030063A3/de
Application granted granted Critical
Publication of EP1030063B1 publication Critical patent/EP1030063B1/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
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D11/00—Other rotary non-positive-displacement 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
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/106—Shaft sealings especially adapted for liquid pumps
    • 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
    • F05B2240/00—Components
    • F05B2240/70—Slinger plates or washers

Definitions

  • the present invention relates to a drain pump, and specifically, to a drain pump equipped in an air conditioner.
  • a drain pump is used to discharge the drain water collected in the drain pan.
  • the drain pump comprises a housing having a suction opening formed to the lower area thereof, an opening formed to the upper area thereof, and a discharge opening formed to the side portion thereof, and a vane rotatably equipped 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 driving shaft of the motor is rotatably penetrated through a hole formed to the cover and connected to the shaft of the vane.
  • the deflector board of the conventional drain pump is moved towards the motor, and thereby, the deflector board comes into contact with the bracket of the motor, which causes the peripheral portion of the board to vibrate and generate noise.
  • the present invention provides a drain pump with a deflector board which is prevented from contacting the motor, and also with a bearing of the driving shaft in the motor having improved lubrication.
  • the present invention provides a drain pump including a deflector board mounted to a driving shaft of a motor for driving a rotary vane which rotates inside a pump housing, wherein said deflector board is placed between said rotary vane and a collar equipped to said driving shaft comprising a disk-shaped flange and a cylindrical portion.
  • the drain pump characterizes in that an end surface of said cylindrical portion of said collar, on the other end of which is positioned said flange, forms a surface for receiving a lubricant oil for lubricating a bearing of said motor.
  • the deflector disk of the pump is prevented from moving towards the motor, and at the same time, the structure enables to effectively lubricate the bearing of the driving shaft of the motor.
  • FIG. 1 is a side view showing a portion of the drain pump according to the invention in cross-section
  • FIG. 2 is an enlarged view of the main portion of FIG. 1.
  • a pump body of the drain pump according to the present invention which is denoted as a whole by reference number 10, comprises a pump housing constituted of a housing 20 and a lid 22, and a rotary vane 30 stored inside the pump housing.
  • the housing 20 comprises a suction opening 21a and a discharge opening 21b of the drain water, which are communicated to a pump chamber 21c.
  • a penetrating hole 24 is formed to the center of the lid 22 mounted to the upper portion of the housing 20.
  • a driving shaft 60 of the motor penetrates through the hole 24, and the shaft is inserted to a hole 34 with a bottom formed to a shaft unit 32 equipped to a rotary vane 30.
  • a motor 50 is equipped with a stator 51 mounted outside the motor.
  • a rotor 54 is further equipped inside upper and lower bracket 52 of the motor 51, which rotates the driving shaft 60 of the motor.
  • the driving shaft 60 is supported by two bearings 70 and 80 positioned in an upper area and a lower area of the upper and lower motor brackets 52.
  • the bearings 70 and 80 are formed, for example, of a sintered alloy of the iron or copper system which has a porous structure, so that the bearing will have a good oil retaining character.
  • Oil impregnated members 72 and 82 formed of felt and the like are inserted to the outside of the bearings 70 and 80, which are supported by ring-shaped springs 74 and 84 against the upper and lower brackets 52.
  • the driving shaft 60 of the motor protrudes from the bracket 52 of the motor and is press-fitted to the hole 34 with a bottom formed to the shaft 32 of the rotary vane 30, and drives the rotary vane 30.
  • the hole 34 with a bottom formed to the shaft 32 may also be formed as a penetrating hole.
  • a deflector disk 40 formed of a thin plastic film is mounted to the upper surface of the shaft 32, through which the driving shaft 60 of the motor penetrates.
  • a plastic collar 100 is press-fitted to the driving shaft 60 of the motor.
  • the collar 100 is formed as one unit, so the mounting of the collar to the driving shaft 60 may be performed easily.
  • the collar 100 comprises a cylindrical portion 105 and a disk-shaped flange 110, and the flange 110 is positioned above the deflector disk 40.
  • the deflector disk 40 prevents the drain water returning from the discharge pipe (not shown) and leaking out through the penetrating hole 24 of the lid 22 from splashing onto the motor.
  • the flange 110 prevents the deflector disk 40 from being pushed up towards the motor, for example when the operation of the drain pump is stopped. In other words, even if the deflector disk 40 is moved, it will contact the flange 110, which prevents the dusk 40 from moving any closer to the motor.
  • the diameter of the deflector disk 40 is larger than that of the flange 110, only the center area of the deflector disk 40 will come into contact with the flange 110, and therefore, no vibration of the peripheral area of the disk 40 will occur.
  • the flange 110 and the cylindrical portion 105 are formed as an integral unit, the flange is positioned so that it crosses the axis of the motor driving shaft 60 at right angles. Therefore, only minimum noise is generated when the vane is rotated, and the flange is prevented from contacting the lid 22 or the motor bracket 52.
  • an oil collect area 130 where the lubricant gathers is formed between the bearing 80 and the upper end surface 120 of the collar 100, which prevents the lubricant (lubricating oil) from leaking.
  • the upper end surface 120 of the collar which functions as the oil receive surface is opposed to the bearing 80 in an approximate position, and the space between the surface and the bearing is set to approximately 0.5 mm.
  • the temperature of the oil is increased and the viscosity is decreased, which causes the oil to leak along the shaft.
  • the oil having decreased viscosity travels to the upper end surface 120 of the cylindrical portion 105, but stays on the surface 120 by surface tension, and forms the oil collect area 130.
  • the bearing 80 formed of a porous material absorbs the oil collected to the upper end surface 120 of the cylindrical portion by capillary phenomenon, and the oil collect area 130 disappears.
  • Such function of the cylindrical portion prevents the oil for lubricating the motor bearing from leaking.
  • the drain pump characterizes in that a collar comprising a disk-shaped flange and a cylindrical portion is formed to the outer circumference of the driving shaft penetrating through the lid of the pump housing.
  • the collar effectively prevents the deflector disk from being moved towards the motor, and also prevents water from splashing on the motor.
  • the upper end surface of the collar acts as a receive surface of the lubricant oil of the motor bearing, and forms an oil collect area between the surface and the bearing.
  • the oil is held in position by the surface tension of the oil.
  • the bearing is formed of a porous sintered alloy and the like, and the oil gathered on the oil receive surface is absorbed using the capillary phenomenon of the bearing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Rotary Pumps (AREA)
  • Motor Or Generator Frames (AREA)
EP99125699A 1999-02-19 1999-12-23 Entleerungspumpe Expired - Lifetime EP1030063B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP4114699 1999-02-19
JP04114699A JP4294143B2 (ja) 1999-02-19 1999-02-19 排水ポンプ

Publications (3)

Publication Number Publication Date
EP1030063A2 true EP1030063A2 (de) 2000-08-23
EP1030063A3 EP1030063A3 (de) 2000-10-04
EP1030063B1 EP1030063B1 (de) 2002-03-06

Family

ID=12600290

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99125699A Expired - Lifetime EP1030063B1 (de) 1999-02-19 1999-12-23 Entleerungspumpe

Country Status (7)

Country Link
EP (1) EP1030063B1 (de)
JP (1) JP4294143B2 (de)
KR (1) KR20000057773A (de)
CN (1) CN1120938C (de)
DE (1) DE69900973T2 (de)
ES (1) ES2173699T3 (de)
TW (1) TW445349B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2113669A3 (de) * 2008-04-28 2013-07-10 Fujikoki Corporation Entwässerungspumpe
JP2014107893A (ja) * 2012-11-26 2014-06-09 Fuji Koki Corp 排水ポンプ用モータ

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4737701B2 (ja) * 2001-06-18 2011-08-03 株式会社鷺宮製作所 空気調和機用排水ポンプ
JP3711998B2 (ja) 2003-12-05 2005-11-02 ダイキン工業株式会社 ドレンポンプ及びそれを備えた空気調和装置
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
CN105464995B (zh) * 2014-09-26 2019-01-11 株式会社不二工机 排水泵
JP6771768B2 (ja) * 2017-03-27 2020-10-21 株式会社不二工機 排水ポンプ

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB562907A (en) * 1943-02-10 1944-07-20 Thompson Prod Inc Improvements in or relating to fuel-pumping systems
US3614272A (en) * 1970-02-02 1971-10-19 Hpe Inc Pump assembly
US3655295A (en) * 1970-10-01 1972-04-11 Eco Pump Corp Mechanical seal for centrifugal pumps
EP0760428A1 (de) * 1995-08-29 1997-03-05 Fujikoki Corporation Abflusspumpe

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB562907A (en) * 1943-02-10 1944-07-20 Thompson Prod Inc Improvements in or relating to fuel-pumping systems
US3614272A (en) * 1970-02-02 1971-10-19 Hpe Inc Pump assembly
US3655295A (en) * 1970-10-01 1972-04-11 Eco Pump Corp Mechanical seal for centrifugal pumps
EP0760428A1 (de) * 1995-08-29 1997-03-05 Fujikoki Corporation Abflusspumpe

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2113669A3 (de) * 2008-04-28 2013-07-10 Fujikoki Corporation Entwässerungspumpe
JP2014107893A (ja) * 2012-11-26 2014-06-09 Fuji Koki Corp 排水ポンプ用モータ

Also Published As

Publication number Publication date
EP1030063A3 (de) 2000-10-04
DE69900973D1 (de) 2002-04-11
DE69900973T2 (de) 2002-11-21
CN1120938C (zh) 2003-09-10
TW445349B (en) 2001-07-11
ES2173699T3 (es) 2002-10-16
KR20000057773A (ko) 2000-09-25
CN1263996A (zh) 2000-08-23
JP4294143B2 (ja) 2009-07-08
EP1030063B1 (de) 2002-03-06
JP2000240581A (ja) 2000-09-05

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