EP2113669A2 - Entwässerungspumpe - Google Patents

Entwässerungspumpe Download PDF

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Publication number
EP2113669A2
EP2113669A2 EP09158883A EP09158883A EP2113669A2 EP 2113669 A2 EP2113669 A2 EP 2113669A2 EP 09158883 A EP09158883 A EP 09158883A EP 09158883 A EP09158883 A EP 09158883A EP 2113669 A2 EP2113669 A2 EP 2113669A2
Authority
EP
European Patent Office
Prior art keywords
motor
lid member
drainage pump
rotating blades
main body
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.)
Withdrawn
Application number
EP09158883A
Other languages
English (en)
French (fr)
Other versions
EP2113669A3 (de
Inventor
Yoshiyuki Kume
Yuya Kato
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 EP2113669A2 publication Critical patent/EP2113669A2/de
Publication of EP2113669A3 publication Critical patent/EP2113669A3/de
Withdrawn legal-status Critical Current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
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/106—Shaft sealings 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
    • 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
    • F04D5/00—Pumps with circumferential or transverse flow
    • F04D5/001—Shear force pumps

Definitions

  • the present invention relates to a drainage pump equipped in an air conditioner.
  • a water content in the air is condensed and attached to a heat exchanger at a time of a cooling operation, and drops as drain water into a drain pan provided in a lower side of the heat exchanger.
  • a drainage pump is used for discharging the drain water reserved in the drain pan.
  • the drainage pump is structured such that a suction port is formed in a lower portion, an upper portion is open, rotating blades are rotatably provided within a housing including a pump main body case having a discharge port in a side portion, and the rotating blades are rotated by a motor fixed to an upper portion above an opening of the housing via a cover.
  • a drive shaft of the motor rotatably passes through a through hole formed in the cover so as to be coupled to a shaft portion of the blades, and when the rotating blades are rotated by driving the motor, the drain water reserved within the drain pan is sucked from a lower end of the suction port, is pumped up on the basis of centrifugal force, and is discharged to an external portion from the discharge port.
  • Fig. 5 is an explanatory view of a conventional drainage pump as disclosed in Japanese Unexamined Patent Publication No. 9-53591 .
  • the drainage pump denoted by reference numeral 1 as a whole has an electric motor 10, and the electric motor 10 is fed with electricity via a lead wire 11.
  • the electric motor 10 is supported by a bracket 20, and a lower end portion of the bracket 20 is coupled to a lid member 30 attached to an upper portion of a case main body 50.
  • a housing of the drainage pump is constructed by the case main body 50 and the lid member 30.
  • the case main body 50 is formed by a plastic, and a pump chamber 52 is formed in an inner portion.
  • a suction port 60 and a discharge port 70 which communicate with the pump chamber 52 are integrally formed in the case main body 50.
  • a rotating blades 100 are arranged within the pump chamber 52, and an opening portion of the pump chamber 52 is covered by the lid member 30.
  • a seal member 40 is inserted between the case main body 50 and the lid member 30, and the drain water is prevented from leaking out of the pump chamber.
  • the rotating blades 100 have a shaft portion 110, and an output shaft 12 of the electric motor 10 is inserted to a closed-end hole of the shaft portion 110.
  • Plate-like large-diameter blades 120 extending in a radial direction from the shaft portion 110 are provided, and the large-diameter blades 120 are connected to small-diameter blades 140 via coupling portions 130.
  • the drain water from the suction port is fed toward the large-diameter blades 120 via the small-diameter blades 140 and the coupling portions 130.
  • a deflector board 14 is formed in a circular plate shape, has a hole in a center portion, and is pressure fitted to the output shaft 12. The deflector board 14 prevents the drain water (particularly backwater) spouting out of the through hole 36 of the lid member 30 from flying toward the motor 10.
  • the output shaft 12 which may be charged by breakage of a basic insulation, is handled as a charged portion in a safety standard, and IEC60335-1 and JIS C 9335-1 provides that "a conductive liquid which can be in contact or may be in contact by a normal use should not directly come into contact with a charged portion".
  • IEC60335-1 and JIS C 9335-1 provides that "a conductive liquid which can be in contact or may be in contact by a normal use should not directly come into contact with a charged portion".
  • the present invention is made by taking the problem mentioned above into consideration, and an object of the present invention is to provide a drainage pump in which safety is enhanced by preventing water from directly coming into contact with a metal output shaft of an electric motor, in the drainage pump equipped in an air conditioner.
  • a drainage pump comprising:
  • the deflector board is installed to an outer peripheral groove formed at a motor side end portion of the shaft portion, and a taper portion for facilitating installation of the deflector board is provided at the motor side end portion of the shaft portion.
  • a drainage pump comprising:
  • the lid member is divided into two pieces in a semicircular shape.
  • a drainage pump comprising:
  • the adhesive agent enters in such a manner as to fill a gap between the motor side end portion of the shaft portion and the deflector board.
  • the water does not come into contact with the metal output shaft of the electric motor, and safety is enhanced.
  • Fig. 1 is an explanatory view of a drainage pump in accordance with Embodiment 1.
  • Fig. 2 is an enlarged view of a substantial part of the drainage pump in accordance with Embodiment 1.
  • the same reference numerals are attached to the same portions as the conventional drainage pump explained in Figs. 5 and 6 , and a description will be given of different portions from the conventional drainage pump explained in Figs. 5 and 6 .
  • Rotating blades 200 have a shaft portion 210, and a metal output shaft 12 of an electric motor 10 is inserted to a closed-end hole 213 of the shaft portion 210.
  • a motor side end portion of the shaft portion 210 has an outer peripheral groove 212 around a whole periphery thereof, and an end thereof toward the electric motor 10 has a taper portion 211.
  • a deflector board 15 formed by a nonconductive resin or the like is formed in a circular plate shape and has a hole in a center portion thereof, and the hole is pressure fitted to the outer peripheral groove 212 of the shaft portion 210.
  • the deflector board 15 is pressure fitted to the shaft portion 210 from an upper portion thereof in a state that the shaft portion 210 passes through at least a through hole 36 of a lid member 30. At this time, the pressure fitting is made easier by the taper portion 211. Thus, the hole provided in the center portion of the deflector board 15 enters into the groove portion 212 in accordance with the pressure fitting, and assembly is achieved. Pressure fitting dimensions are secured even in a state that the deflector board 15 is assembled in the outer peripheral groove 212, and the shaft portion 210 and the deflector board 15 are securely installed in a tight contact state. Thereafter, the output shaft 12 of the electric motor 10 is inserted to the closed-end hole 213 of the shaft portion 210.
  • the case main body 50 may be assembled after insertion of the output shaft 12 to the shaft portion 210, or may be assembled before the insertion.
  • a backwater (a drain water) comes into contact with the deflector board 15 through the through hole 36 of the lid member 30. At this time, the water does not fly toward the electric motor 10 by the deflector board 15.
  • the deflector board 15 is structured such as to pressure fitted to the outer peripheral groove 212 in the tight contact state, the water does not directly touch the conductive metal output shaft 12, and it is possible to avoid a risk of an electric leakage or the like.
  • Fig. 3 is an enlarged view of a substantial part of a drainage pump in accordance with Embodiment 2.
  • the same reference numerals are attached to the same portions as the conventional drainage pump explained in Figs. 5 and 6 , and a description will be given of different portions from the conventional drainage pump explained in Figs. 5 and 6 .
  • Rotating blades 300 has a shaft portion 310, and the metal output shaft 12 of the electric motor 10 is inserted to a closed-end hole 313 of the shaft portion 310.
  • a circular deflector board 310a is integrally formed with the shaft portion 310, at an end portion toward the electric motor 10 of the shaft portion 310. They are formed by a nonconductive resin material or the like. Accordingly, they are formed in a state that a gap does not exist between the deflector board 310a and the shaft portion 310.
  • a lid member 30' is structured such as to be divided into two semicircular pieces. Accordingly, the lid member 30' can be attached even to the shaft portion 310 which is integrally formed with the deflector board 310a.
  • the backwater comes into contact with the deflector board 310a through the through hole 36 of the lid member 30. Since the deflector board 310a is integrally formed with the shaft portion 310, the water does not directly touch the metal output shaft 12, and it is possible to avoid a risk of an electric leakage or the like.
  • Fig. 4 is an enlarged view of a substantial part of a drainage pump in accordance with Embodiment 3.
  • the same reference numerals are attached to the same portions as the conventional drainage pump explained in Figs. 5 and 6 , and a description will be given of different portions from the conventional drainage pump explained in Figs. 5 and 6 .
  • a different point from the conventional drainage pump explained in Figs. 5 and 6 is that the deflector board 14 and the end portion of the shaft portion 110 are bonded by a nonconductive adhesive agent 410.
  • the deflector board 14 is formed in a circular shape, has a hole in a center portion thereof, and is structured such that the output shaft 12 passes through the hole.
  • the adhesive agent is applied to an outer periphery of the end portion of the shaft portion 110 and the lower surface of the deflector board 14 in a full circle, and bond them.
  • a part 411 of the adhesive agent enters into a gap between the deflector board 14 and the end portion 111 of the shaft portion 110, and covers in such a manner as to surround the output shaft 12 to achieve a secure bonding.
  • the backwater comes into contact with the deflector board 14 through the through hole 36 of the lid member 30. At this time, the water does not fly toward the electric motor 10, by the deflector board 14.
  • the deflector board 14 is bonded to the outer periphery of the end portion of the shaft portion 110 over the whole periphery by the adhesive agent 410, the water neither enter into the portion between the deflector board 14 and the end portion 111 of the shaft portion 110, nor directly touch the metal output shaft 12, and it is possible to avoid the risk of the electric leakage or the like.
  • the parts of the deflector board 14 and the rotating blades 100 of the conventional drainage pump explained in Figs. 5 and 6 can be used as they are.
  • Embodiments 1 to 3 since the structure is made such as to directly install or couple the deflector board to the shaft portion of the rotating blades, the flying water does not touch the output shaft of the motor, and it is possible to avoid the risk of the electric leakage or the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP09158883.0A 2008-04-28 2009-04-28 Entwässerungspumpe Withdrawn EP2113669A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008117040A JP2009264317A (ja) 2008-04-28 2008-04-28 排水ポンプ

Publications (2)

Publication Number Publication Date
EP2113669A2 true EP2113669A2 (de) 2009-11-04
EP2113669A3 EP2113669A3 (de) 2013-07-10

Family

ID=40823056

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09158883.0A Withdrawn EP2113669A3 (de) 2008-04-28 2009-04-28 Entwässerungspumpe

Country Status (2)

Country Link
EP (1) EP2113669A3 (de)
JP (1) JP2009264317A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113090535A (zh) * 2021-04-25 2021-07-09 中国科学院上海应用物理研究所 一种高温介质泵抗颗粒渣浆水力装置
WO2021228024A1 (zh) * 2020-07-03 2021-11-18 青岛海尔空调电子有限公司 空调器室内机

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5492695B2 (ja) 2010-07-23 2014-05-14 本田技研工業株式会社 ポンプ
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
JP6304990B2 (ja) * 2013-09-27 2018-04-04 株式会社不二工機 排水ポンプ

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0953591A (ja) 1995-08-11 1997-02-25 Fuji Koki:Kk 排水ポンプ

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE422024C (de) * 1924-05-13 1925-11-24 Giesserei Zentrifugalpumpe mit wagerechter Schleuderradwelle und Fluessigkeitsdichtung
FR1173652A (fr) * 1957-04-25 1959-02-27 Alsacienne Constr Meca Dispositif d'étanchéité entre un arbre et une paroi traversée par cet arbre
US3476396A (en) * 1964-04-14 1969-11-04 Daimler Benz Ag Shaft seal with return rifling
JPS5623516Y2 (de) * 1972-02-14 1981-06-02
WO1983000364A1 (en) * 1981-07-17 1983-02-03 John Trevor Rice A motor-pump assembly
FR2525699A1 (fr) * 1982-04-26 1983-10-28 Largeaud Paul Machine rotative - telle une pompe centrifuge - avec organe d'etancheite facilement demontable
US5308229A (en) * 1992-06-03 1994-05-03 Pmc Liquiflo Equipment Company Pump having an internal gas pump
JP4294143B2 (ja) * 1999-02-19 2009-07-08 株式会社不二工機 排水ポンプ
JP2006112335A (ja) * 2004-10-15 2006-04-27 Fuji Koki Corp 排水ポンプ

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0953591A (ja) 1995-08-11 1997-02-25 Fuji Koki:Kk 排水ポンプ

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021228024A1 (zh) * 2020-07-03 2021-11-18 青岛海尔空调电子有限公司 空调器室内机
CN113090535A (zh) * 2021-04-25 2021-07-09 中国科学院上海应用物理研究所 一种高温介质泵抗颗粒渣浆水力装置
CN113090535B (zh) * 2021-04-25 2022-09-27 中国科学院上海应用物理研究所 一种高温介质泵抗颗粒渣浆水力装置

Also Published As

Publication number Publication date
JP2009264317A (ja) 2009-11-12
EP2113669A3 (de) 2013-07-10

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