WO2021171991A1 - 排水ポンプ - Google Patents

排水ポンプ Download PDF

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Publication number
WO2021171991A1
WO2021171991A1 PCT/JP2021/004663 JP2021004663W WO2021171991A1 WO 2021171991 A1 WO2021171991 A1 WO 2021171991A1 JP 2021004663 W JP2021004663 W JP 2021004663W WO 2021171991 A1 WO2021171991 A1 WO 2021171991A1
Authority
WO
WIPO (PCT)
Prior art keywords
discharge port
convex portion
drainage pump
housing
drainage
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.)
Ceased
Application number
PCT/JP2021/004663
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
克司 佐藤
友也 加藤
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
Priority to CN202180016794.9A priority Critical patent/CN115151729B/zh
Publication of WO2021171991A1 publication Critical patent/WO2021171991A1/ja
Anticipated expiration legal-status Critical
Ceased 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
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/14—Pumps raising fluids by centrifugal force within a conical rotary bowl with vertical axis
    • 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

Definitions

  • the present disclosure relates to a drainage pump, and particularly to a drainage pump suitable for draining drainage water in a drain pan that receives condensed water in an indoor heat exchanger of an air conditioner to the outside.
  • an air conditioner embedded in the ceiling of a room is equipped with a drain pan that receives drain water condensed on the surface of the indoor heat exchanger of the air conditioner. ing.
  • a drainage pump (drain pump) is used to drain the drain water in the drain pan to the outside.
  • the drainage pump has a motor, a motor case that supports the motor, and a pump body that is arranged below the motor case.
  • the pump body is provided with a suction port at the lower end of the housing and a discharge port at the side.
  • rotary blades rotated by a motor are housed inside the pump chamber provided in the housing.
  • the rotary blade has a shaft portion connected to the drive shaft of the motor, and a plurality of flat plate-shaped large-diameter blades extending in the radial direction from the outer peripheral portion of the shaft portion.
  • a through hole through which the drive shaft of the motor penetrates is formed in the upper part of the housing.
  • the drain water collected in the drain pan is sucked up from the suction port and flows into the pump chamber, and the drain water in the pump chamber obtains centrifugal force by the rotating rotary blades and the discharge port. Is discharged more. Then, the drain water discharged from the discharge port is discharged to the outside of the room via the pipe.
  • the object of the present disclosure is to provide a drainage pump capable of reducing noise caused by return water when stopped.
  • the drainage pump includes a motor, a housing having an upper portion open and a suction port provided at a lower end portion, and a discharge port provided at a side portion for connecting a drain pipe. It has a rotary vane connected to a motor and a pump body having a through hole in the center and a cover attached to the upper end of the housing, and the housing and the cover define a pump chamber.
  • the drainage pump is characterized in that a convex portion is provided at the end of the discharge port outlet at the discharge port to prevent the return water from the drain pipe from flowing into the discharge port outlet.
  • the convex portion may be provided in an annular shape.
  • convex portion and the radial outer portion may be formed in a stepped shape.
  • the convex portion may be formed in a tapered shape in which the diameter is reduced as it protrudes from the radial outer portion.
  • a concave portion recessed from the radial outer portion on the side opposite to the protruding direction of the convex portion may be formed.
  • FIG. 5 is an enlarged cross-sectional view showing a modified example 3 of a convex portion at a discharge port outlet.
  • FIG. 5 is an enlarged cross-sectional view showing a modified example 4 of a convex portion at a discharge port outlet.
  • FIG. 5 is an enlarged cross-sectional view showing a state in which the inflow of return water from the drain pipe to the outlet of the discharge port is obstructed by a convex portion.
  • the drainage pump 10 has a motor 12 and a pump main body 20.
  • the motor 12 is provided above the pump main body 20, and a motor case 30 for supporting the motor 12 is provided between the motor 12 and the pump main body 20.
  • the pump body 20 is made of synthetic resin as an example, and includes a housing 40, a rotary blade 50, and a cover 32.
  • the housing 40 has an upper portion open and a suction port 42 is provided at the lower end portion, and a discharge port 46 for connecting the drain pipe 26 is provided at the side portion.
  • the suction port 42 is formed in a pipe shape having an opening 43 at the lower end.
  • the discharge port 46 includes a discharge port inlet 48 that opens into the pump chamber 44 and a discharge port outlet 68, and projects laterally.
  • the discharge port outlet 68 is located at the tip of the discharge port 46 on the protruding side.
  • the protruding side of the discharge port 46 is the downstream side of the drain water drained from the pump chamber 44 when the drainage pump 10 is operated.
  • the discharge port 46 is arranged on the radial side of the rotary shaft 50CL of the rotary blade 50, which will be described later.
  • the axis 46CL of the discharge port 46 is arranged in the horizontal direction.
  • a shaft portion 52 located at the center of the rotary blade 50, which will be described later, is located on the shaft line 46CL of the discharge
  • a drain pipe 26 for draining the drain water discharged from the discharge port 46 to the outside of the pump main body 20 to an external drainage facility or the like is attached to the discharge port 46.
  • the housing 40 is provided with, for example, a pair of claws (not shown) for fixing the motor case 30.
  • the discharge port 46 is not limited to the one integrally molded with the housing 40, and may be formed separately from the housing 40 and assembled to the housing 40.
  • a convex portion 70 is provided at the end of the discharge port outlet 68 in the discharge port 46 to prevent the return water from the drain pipe 26 from flowing into the discharge port outlet 68.
  • "obstructing” means disturbing the flow of the return water flowing into the discharge port outlet 68 and reducing the flow velocity, and does not mean blocking the inflow of the return water to the discharge port outlet 68. ..
  • the convex portion 70 is provided, for example, in an annular shape on the radial inner portion 68A at the end of the discharge port outlet 68, and protrudes from the radial outer portion 68B of the end to the downstream side when draining from the pump chamber 44.
  • the convex portion 70 projects in the direction farther from the pump chamber 44. ..
  • the convex portion 70 may be formed intermittently in the circumferential direction.
  • the convex portion 70 and the radial outer portion 68B are formed in a stepped shape, for example.
  • the radial outer portion 68B is formed as an end face perpendicular to the axis 46CL of the discharge port 46.
  • the convex portion 70 projects to the downstream side at the time of drainage from the pump chamber 44 from the radial outer portion 68B.
  • the corner portion 70A on the outer peripheral side of the convex portion 70 is chamfered, for example, in a flat cross section. This chamfer is the so-called C surface.
  • the shape of the convex portion 70 is not limited to this.
  • the convex portion 70 is formed in a tapered shape in which the diameter is reduced as it protrudes from the radial outer portion 68B.
  • the outer peripheral surface between the radial inner portion 68A and the radial outer portion 68B is composed of the tapered surface 72.
  • the corner portion 70A on the outer peripheral side of the convex portion 70 is chamfered in an arc shape in cross section.
  • This chamfer is the so-called R surface.
  • "chamfering" refers to the case where a cornered protruding corner is processed to form an R surface or a C surface in the protruding corner, and the R surface is formed by casting, injection molding, or the like. Also includes the case of molding a protruding corner portion having the shape of a C surface or a C surface. In the latter case as well, for convenience of explanation, an expression such as "chamfered corners" may be used.
  • a concave portion 74 recessed from the radial outer portion 68B to the side opposite to the protruding direction of the convex portion 70 is formed between the convex portion 70 and the radial outer portion 68B.
  • the recess 74 is formed in an annular shape, for example. Further, the depth of the recess 74 corresponds to, for example, the position of the protrusion 66 in the direction of the axis 46CL of the discharge port 46, and as an example, the bottom of the recess 74 corresponds to the position of the maximum diameter of the protrusion 66.
  • the recess 74 may be formed intermittently in the circumferential direction.
  • the recess 74 is formed deeper than in the example of FIG. Specifically, the depth of the recess 74 exceeds, for example, the position of the protrusion 66 in the direction of the axis 46CL of the discharge port 46. In other words, the bottom of the recess 74 is located at a position farther than the protrusion 66 when viewed from the discharge port outlet 68. Further, in the modified example 4, the width of the recess 74 in the radial direction is formed to be smaller than that of the modified example 3. The width of the recess 74 in the modified example 4 may be the same as that of the modified example 3.
  • a hook-shaped protrusion 66 is provided on the outer periphery of the radial outer portion 68B at the end of the discharge port outlet 68.
  • the protrusion 66 bites into the inner surface of the drain pipe 26 and has a role of suppressing the drainage from leaking from the gap between the drain pipe 26 and the discharge port outlet 68. doing.
  • a step portion 18 is formed on the upper edge of the inner surface 40A of the housing 40.
  • the step portion 18 extends radially outward from the position of the inner surface 40A of the housing 40.
  • a seal member 34 which will be described later, is arranged on the step portion 18.
  • the rotary vane 50 is connected to the motor 12 and housed in the pump chamber 44.
  • the rotary blade 50 is made of synthetic resin as an example, and has a plurality of flat plate-shaped large plates extending from the shaft portion 52 and the outer peripheral portion of the shaft portion 52 in the radial direction (in other words, radially outside) of the rotary shaft 50CL. It has a diameter blade 60 and a plurality of flat plate-shaped small diameter blades 61 connected to the lower end edge of each large diameter blade 60 and inserted into the suction port 42.
  • the large-diameter blades 60 are provided, for example, at equal angles in the circumferential direction.
  • each large-diameter blade 60 is formed in a tapered shape that inclines downward toward the inner diameter side.
  • Each lower end edge is connected to a disk-shaped annular member 62 having a plurality of fan-shaped openings 58 in the center.
  • the large-diameter blade 60 is provided on the shaft portion 52 so that the large-diameter blade 60 of the rotary blade 50 is located in front of the discharge port 46, that is, on the axis 46CL of the discharge port 46. Further, the outer peripheral edge of the annular member 62 is located above the lower end of the inner surface 56 of the discharge port 46 and below the axis 46CL of the discharge port 46.
  • the shaft portion 52 penetrates the through hole 36 having the role of an air hole formed in the center of the cover 32 and projects toward the motor 12.
  • the drive shaft of the motor 12 is inserted and fixed in the hole provided along the central shaft of the shaft portion 52.
  • a gap is provided between the through hole 36 and the shaft portion 52.
  • a drainage disk 14 is attached to the upper surface of the shaft portion 52.
  • the drainage disk 14 has a role of preventing the drained water from being directly scattered to the motor 12 even if the drained water is blown out from the through hole 36 of the cover 32.
  • the motor case 30 includes a tubular portion 22 that can be divided into upper and lower parts, and the motor 12 is housed in the upper portion of the tubular portion 22. Further, a vertically long slit-shaped drainage hole (in other words, an opening for drainage) (in other words, an opening for drainage) is formed on the side portion of the tubular portion 22.
  • the cover 32 has a through hole 36 in the central portion and is attached to the upper end portion of the housing 40. Specifically, the cover 32 is integrally formed at the lower end of the tubular portion 22 of the motor case 30, for example. Further, the cover 32 is fitted into the housing 40 with the seal member 34 sandwiched between the cover 32 and the stepped portion 18 of the housing 40. The cover 32 is fixed to the housing 40 by fitting the claw portion (not shown) into the motor case 30. In the pump body 20, the pump chamber 44 is defined by the housing 40 and the cover 32.
  • a drain pan 80 for temporarily storing the drain water discharged from the air conditioner or the like is arranged below the suction port 42.
  • FIG. 1 This embodiment is configured as described above, and its operation will be described below.
  • the drainage pump 10 according to the present embodiment is appropriately installed so that the lower end of the suction port 42 is below the surface Ws of the drain water collected in the drain pan 80. Then, when the motor 12 is driven to rotate the rotary blade 50 at high speed, the drain water collected in the drain pan 80 is sucked up from the suction port 42 and discharged from the discharge port 46 via the pump chamber 44. The drain water discharged from the discharge port 46 is discharged to an external drainage facility or the like via the drain pipe 26.
  • a part of the drain water remaining in the drain pipe 26 enters the discharge port 46 from the discharge port outlet 68, and further, the discharge port Enter the pump chamber 44 from the inlet 48. That is, a part of the drain water becomes return water and flows back to the drainage pump 10.
  • a convex portion 70 is provided at the end of the discharge port outlet 68 in the discharge port 46 to prevent the return water from the drain pipe 26 from flowing into the discharge port outlet 68.
  • the flow of the return water is disturbed by a part of the return water entering this space, and the return water is discharged.
  • a pressure loss occurs and the flow velocity decreases.
  • the return water flows into the discharge port 46 from the discharge port outlet 68 in a state where the kinetic energy is reduced as compared with the case where the convex portion 70 is not provided at the discharge port outlet 68.
  • the convex portion 70 is formed in a tapered shape in which the diameter is reduced as it protrudes from the radial outer portion 68B, and the convex portion 70 and the radial outer portion 68B are formed in a stepped shape.
  • the decrease in the kinetic energy of the return water is less than that of the configuration of FIG.
  • the decrease in the kinetic energy of the return water is larger than that in the configuration of FIG. Comparing the modified example 3 and the modified example 4, since the concave portion 74 is deeper and the width of the concave portion 74 in the radial direction is smaller in the modified example 4, the decrease in the kinetic energy of the return water is larger.
  • the noise generated when the return water flows back to the drainage pump 10 can be reduced.
  • the convex portion 70 is provided at the radial inner portion 68A of the discharge port outlet 68, but the radial position of the convex portion 70 is not limited to this, and the return water flows into the discharge port outlet 68. Any configuration may be used as long as it can prevent the above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
PCT/JP2021/004663 2020-02-26 2021-02-08 排水ポンプ Ceased WO2021171991A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202180016794.9A CN115151729B (zh) 2020-02-26 2021-02-08 排水泵

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020-030956 2020-02-26
JP2020030956A JP7357356B2 (ja) 2020-02-26 2020-02-26 排水ポンプ

Publications (1)

Publication Number Publication Date
WO2021171991A1 true WO2021171991A1 (ja) 2021-09-02

Family

ID=77490460

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/004663 Ceased WO2021171991A1 (ja) 2020-02-26 2021-02-08 排水ポンプ

Country Status (3)

Country Link
JP (1) JP7357356B2 (https=)
CN (1) CN115151729B (https=)
WO (1) WO2021171991A1 (https=)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114810640B (zh) * 2022-06-06 2024-01-23 山东省章丘鼓风机股份有限公司 一种径向剖分结构的高速直驱风机

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49100091U (https=) * 1972-12-19 1974-08-28
JP2000213770A (ja) * 1999-01-27 2000-08-02 Fuji Koki Corp 排水ポンプ
JP2001336489A (ja) * 2000-05-29 2001-12-07 Nissan Motor Co Ltd 燃料電池用リショルム圧縮機
JP2002242873A (ja) * 2001-02-16 2002-08-28 Saginomiya Seisakusho Inc 空気調和機用排水ポンプ
JP2006112335A (ja) * 2004-10-15 2006-04-27 Fuji Koki Corp 排水ポンプ
US20140110127A1 (en) * 2012-10-22 2014-04-24 Halliburton Energy Services, Inc. Autonomous fluid control system having a fluid diode

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2907243B2 (ja) * 1991-07-19 1999-06-21 トキコ株式会社 空気圧縮機
CN205877392U (zh) * 2016-07-12 2017-01-11 玉环云达阀门有限公司 一种消音水嘴
KR102184879B1 (ko) 2016-11-22 2020-12-01 가부시기가이샤 후지고오키 배수 펌프
JP6826465B2 (ja) 2017-03-03 2021-02-03 未来工業株式会社 管継手、排水構造及び排水管接続部構造

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49100091U (https=) * 1972-12-19 1974-08-28
JP2000213770A (ja) * 1999-01-27 2000-08-02 Fuji Koki Corp 排水ポンプ
JP2001336489A (ja) * 2000-05-29 2001-12-07 Nissan Motor Co Ltd 燃料電池用リショルム圧縮機
JP2002242873A (ja) * 2001-02-16 2002-08-28 Saginomiya Seisakusho Inc 空気調和機用排水ポンプ
JP2006112335A (ja) * 2004-10-15 2006-04-27 Fuji Koki Corp 排水ポンプ
US20140110127A1 (en) * 2012-10-22 2014-04-24 Halliburton Energy Services, Inc. Autonomous fluid control system having a fluid diode

Also Published As

Publication number Publication date
CN115151729A (zh) 2022-10-04
CN115151729B (zh) 2025-03-04
JP7357356B2 (ja) 2023-10-06
JP2021134711A (ja) 2021-09-13

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