WO2021241340A1 - Pompe de vidange - Google Patents

Pompe de vidange Download PDF

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Publication number
WO2021241340A1
WO2021241340A1 PCT/JP2021/018892 JP2021018892W WO2021241340A1 WO 2021241340 A1 WO2021241340 A1 WO 2021241340A1 JP 2021018892 W JP2021018892 W JP 2021018892W WO 2021241340 A1 WO2021241340 A1 WO 2021241340A1
Authority
WO
WIPO (PCT)
Prior art keywords
wall portion
motor
side wall
bottom wall
housing
Prior art date
Application number
PCT/JP2021/018892
Other languages
English (en)
Japanese (ja)
Inventor
克司 佐藤
良樹 渡邉
Original Assignee
株式会社不二工機
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 株式会社不二工機 filed Critical 株式会社不二工機
Priority to CN202180037456.3A priority Critical patent/CN115698510A/zh
Publication of WO2021241340A1 publication Critical patent/WO2021241340A1/fr

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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

Definitions

  • the present invention relates to, for example, a drainage pump used for discharging drain water of an air conditioner.
  • Patent Document 1 discloses an example of a conventional drainage pump.
  • the drainage pump of Patent Document 1 has a housing and a rotary blade housed in the housing.
  • a motor case is attached to the housing.
  • the rotary blades are rotated by the motor housed in the motor case.
  • the motor case has a lower case and an upper case.
  • FIGS. 8 and 9 show an example of the lower case of the conventional drainage pump.
  • FIG. 8 is a plan view of the lower case of the conventional drainage pump.
  • FIG. 9 is a cross-sectional view taken along the line IX-IX of FIG.
  • the lower case 950 shown in FIGS. 8 and 9 has a bottom wall portion 951, inner side wall portions 952, 953, an outer wall portion 954, and a motor support portion 956.
  • the bottom wall portion 951 has a disk shape.
  • the bottom wall portion 951 closes the upper opening of the housing (not shown).
  • the inner side wall portions 952 and 953 have an arc shape in a plan view.
  • the outer side wall portion 954 has a cylindrical shape.
  • the lower ends of the inner side wall portions 952 and 953 and the lower ends of the outer wall portion 954 are connected to the bottom wall portion 951.
  • the motor support portion 956 has an arc-shaped flat plate portion 956a and a side wall portion 956b connected to the outer edge of the flat plate portion 956a.
  • the inner edge of the flat plate portion 956a is connected to the upper end of the outer wall portion 954.
  • a motor (not shown) is in contact with the flat plate portion 956a and the side wall portion 956b of the motor support portion 956.
  • the motor also touches the upper ends of the inner side wall portions 952 and 953. Therefore, the vibration of the motor is transmitted to the inner side wall portions 952 and 953 and the outer wall portion 954, and the noise cannot be sufficiently reduced.
  • an object of the present invention is to provide a drainage pump capable of effectively reducing noise.
  • the drainage pump according to the present invention has a housing having a suction port and a discharge port, a rotary vane housed in the housing, and is arranged above the housing and connected to the rotary vane. It has a motor having a drive shaft and a motor case attached to the housing and accommodating the motor, and the motor case has a bottom wall portion and a cylindrical inner surface having a lower end connected to the bottom wall portion. On the wall portion, the outer wall portion having an arc shape in a plan view with the lower end connected to the bottom wall portion, or the cylindrical outer wall portion having the lower end connected to the bottom wall portion, and the upper end of the inner side wall portion. It has a connected motor support portion, and is characterized in that the outer wall portion is arranged at a distance from the inner side wall portion, the motor support portion, and the motor.
  • the motor support portion has an arc-shaped flat plate portion and a side wall portion connected to the outer edge of the flat plate portion, and only a part of the inner edge of the flat plate portion is the inner side wall portion. It is preferably connected to the upper end.
  • the motor case has a bottom wall portion, a cylindrical inner side wall portion in which the lower end is connected to the bottom wall portion, and an outer wall portion in a plan view arc shape in which the lower end is connected to the bottom wall portion.
  • it has a cylindrical outer wall portion to which the lower end is connected to the bottom wall portion, and a motor support portion connected to the upper end of the inner side wall portion.
  • the outer wall portion is arranged at a distance from the inner side wall portion, the motor support portion, and the motor. Since this is done, the vibration of the motor is directly transmitted only to the inner side wall portion. Therefore, even if the vibration of the motor is transmitted to the inner side wall portion to generate noise, the noise can be effectively shielded by the outer wall portion.
  • the inner wall surface is compared with the configuration in which the entire inner edge of the flat plate portion is connected to the upper end of the inner side wall portion. The vibration of the motor transmitted to the part can be reduced. This makes it possible to more effectively suppress the noise caused by the vibration of the motor.
  • FIG. 5 is a cross-sectional view taken along the line VI-VI of FIG. It is a graph which shows the relationship between the frequency and noise at the time of drainage operation of a drainage pump. It is a top view of the lower case of a conventional drainage pump. It is sectional drawing which follows the IX-IX line of FIG.
  • FIG. 1 is a front view of a drainage pump according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view of the drainage pump of FIG. In FIG. 2, only the housing and the motor case are shown in cross-sectional view.
  • 3 and 4 are perspective views and plan views of the lower case of the drainage pump of FIG. 1.
  • FIG. 5 is a cross-sectional view taken along the line VV of FIG.
  • FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG.
  • the drainage pump according to this embodiment is for, for example, draining the drain water collected in the drain pan of the indoor unit of the air conditioner to the outside.
  • the use of this drainage pump is not limited to the drainage of drain water.
  • the drainage pump can also be used for discharging and pumping various liquids in the container.
  • the drainage pump 1 of this embodiment has a housing 10, a rotary blade 20, a motor 30, and a motor case 40.
  • the housing 10, the rotary blade 20, and the motor case 40 are made of synthetic resin.
  • the housing 10 has a main body portion 11 having a substantially inverted truncated cone shape.
  • the main body 11 is provided with a suction pipe 12 extending downward.
  • the suction pipe 12 has a cylindrical shape extending linearly in the vertical direction.
  • the suction pipe 12 has a suction port 12a facing downward.
  • the main body 11 is provided with a discharge pipe 13 extending in the lateral direction.
  • the discharge pipe 13 has a discharge port 13a facing in the lateral direction.
  • the discharge pipe 13 has a cylindrical shape extending linearly in the lateral direction.
  • the discharge pipe 13 may have a substantially L-shape or an arc shape in which the discharge port 13a faces upward.
  • the suction pipe 12 and the discharge pipe 13 are connected to a pump chamber 14 provided inside the main body 11.
  • the rotary blade 20 has a shaft portion 21, a large diameter blade portion 22, and a small diameter blade portion 23.
  • the shaft portion 21 has a cylindrical shape.
  • the large-diameter blade portion 22 has a plurality of flat plate-shaped large-diameter blades (not shown) extending radially from the shaft portion 21.
  • the large-diameter blade portion 22 has a cylindrical ring 22a connecting the tips of a plurality of large-diameter blades, and an annular lower plate 22b having an outer peripheral edge connected to the lower end of the ring 22a.
  • the large-diameter blade portion 22 is arranged in the pump chamber 14.
  • the small diameter blade portion 23 has a plurality of flat plate-shaped small diameter blades 23a.
  • the plurality of small diameter blades 23a extend downward from the lower ends of the plurality of large diameter blades through the inside of the lower plate 22b.
  • the small diameter blade portion 23 is arranged inside the suction pipe 12.
  • the motor 30 is arranged above the housing 10.
  • the motor 30 has a motor body 31 and a drive shaft 32 extending downward from the motor body 31.
  • the drive shaft 32 is connected to the shaft portion 21 of the rotary blade 20.
  • the motor case 40 is attached to the housing 10 by the snap-fit mechanism 41.
  • the motor case 40 has a lower case 50 and an upper case 60.
  • the lower case 50 has a bottom wall portion 51, an inner side wall portion 52, outer wall portions 54 and 55, and a motor support portion 56.
  • the bottom wall portion 51 has a disk shape.
  • the bottom wall portion 51 closes the upper end opening of the main body portion 11 of the housing 10.
  • the bottom wall portion 51 defines the pump chamber 14 together with the main body portion 11.
  • a shaft hole 51a is provided in the center of the bottom wall portion 51.
  • the shaft portion 21 of the rotary blade 20 is arranged in the shaft hole 51a.
  • the inner side wall portion 52 has a cylindrical shape. The lower end of the inner side wall portion 52 is connected to the bottom wall portion 51. The inner side wall portion 52 extends upward from the bottom wall portion 51.
  • the outer wall portions 54 and 55 have a circular arc shape in a plan view.
  • the lower ends of the outer side wall portions 54 and 55 are connected to the bottom wall portion 51.
  • the outer side wall portions 54 and 55 extend upward from the bottom wall portion 51.
  • the outer side wall portions 54 and 55 are arranged outside the inner side wall portion 52.
  • the inner side wall portion 52 is arranged between the outer wall portion 54 and the outer wall portion 55.
  • the center of the inner side wall portion 52 and the center of the arcs of the outer wall portions 54 and 55 are at the same position.
  • the position of the upper end of the outer side wall portions 54 and 55 is lower than the position of the upper end of the inner side wall portion 52.
  • outer wall portions 54 and 55 having a plan view arc shape
  • one plan view arc shape outer wall portion or three or more plan view arc shape outer wall portions arranged outside the inner side wall portion 52. May be adopted.
  • a cylindrical outer wall portion arranged outside the inner side wall portion 52 may be adopted.
  • the motor support portion 56 has a flat plate portion 56a and a side wall portion 56b.
  • the flat plate portion 56a has an arc shape.
  • the lower end of the side wall portion 56b is connected to the outer edge of the flat plate portion 56a.
  • a part of the inner edge of the flat plate portion 56a (indicated by reference numeral k in FIG. 4) is connected to the upper end of the inner side wall portion 52.
  • the length of a part of the inner edge of the flat plate portion 56a is preferably 5% or more and 20% or less of the total length of the inner edge.
  • the motor 30 is in contact with the flat plate portion 56a and the side wall portion 56b.
  • the upper case 60 is attached to the side wall portion 56b of the motor support portion 56 of the lower case 50 by a snap-fit mechanism 42.
  • the upper case 60 covers the upper part of the motor 30.
  • the motor case 40 accommodates the motor 30 between the motor support portion 56 and the upper case 60.
  • a part of the wiring portion of the motor 30 and the like is arranged on the outside of the motor case 40.
  • the outer wall portions 54 and 55 of the motor case 40 are arranged at intervals from the inner side wall portion 52, the motor support portion 56, and the motor 30. That is, the outer wall portions 54 and 55 are connected only to the bottom wall portion 51 and are not in direct contact with other than the bottom wall portion 51.
  • the motor case 40 has a bottom wall portion 51, a cylindrical inner side wall portion 52 having a lower end connected to the bottom wall portion 51, and a lower end connected to the bottom wall portion 51. It has outer wall portions 54, 55 having a circular arc shape in a plan view, and a motor support portion 56 connected to the upper end of the inner side wall portion 52.
  • the outer wall portions 54 and 55 are arranged at intervals from the inner side wall portion 52, the motor support portion 56, and the motor 30. Since this is done, the vibration of the motor 30 is directly transmitted only to the inner side wall portion 52. Therefore, even if the vibration of the motor 30 is transmitted to the inner side wall portion 52 to generate noise, the noise can be effectively shielded by the outer wall portions 54 and 55. Therefore, the noise caused by the vibration of the motor 30 can be effectively suppressed.
  • the vibration of the motor 30 transmitted to the inner side wall portion 52 can be further reduced as compared with the configuration in which the entire inner edge of the flat plate portion 56a is connected to the upper end of the inner side wall portion 52.
  • the noise caused by the vibration of the motor 30 can be suppressed more effectively.
  • the length of a part of the inner edge of the flat plate portion 56a to be 5% or more and 20% or less of the total length of the inner edge, it is possible to achieve both the rigidity of the motor support portion 56 and the suppression of noise in a well-balanced manner.
  • the present invention is not limited to the configuration of the embodiment. As long as the gist of the present invention is provided, a person skilled in the art may appropriately add, delete, or change the design of the above-described embodiment, or combine the features of the embodiment as appropriate. Included in the scope of the invention.
  • the present inventors measured the noise during drainage operation using Example 1 and Comparative Example 1 of the drainage pump according to the present invention, and verified the effect of the present invention.
  • Example 1 has the configuration of the drainage pump 1 described above.
  • Comparative Example 1 has a configuration in which the lower case 950 of the conventional drainage pump shown in FIGS. 8 and 9 is adopted. Comparative Example 1 has the same configuration as that of Example 1 except for the lower case 950.
  • the present inventors installed a microphone at a position 1 m above Example 1 and Comparative Example 1, drained drain water from the drain pan using Example 1 and Comparative Example 1, and used Example 1 and Comparative Example 1.
  • the noise during drainage operation was measured.
  • FIG. 7 shows the measurement results.
  • FIG. 7 is a graph showing the relationship between frequency and noise during drainage operation of the drainage pump.
  • Example 1 and Comparative Example 1 waveforms in which noise increased at around 350 Hz and around 900 Hz were observed.
  • the noise level was a value exceeding 20 dB, whereas in Example 1, the noise level was suppressed to a value lower than 20 dB.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

Le problème à résoudre par la présente invention est de fournir une pompe de vidange qui peut efficacement réduire le bruit. La solution selon l'invention porte sur une pompe de vidange (1) qui comporte un carter (40) de moteur qui loge un moteur (30). Le carter (40) de moteur comprend : une partie paroi inférieure (51) ; une partie paroi interne cylindrique (52), dont l'extrémité inférieure est reliée à la partie paroi inférieure (51) ; des parties parois externes (54), (55) qui sont des arcs de cercle dans une vue en plan, et dont les extrémités inférieures sont reliées à la partie paroi inférieure (51) ; et une partie de support (56) de moteur reliée à une extrémité supérieure de la partie paroi interne (52). Les parties parois externes (54), (55) sont disposées de façon à être espacées de la partie paroi interne (52), de la partie de support (56) de moteur et du moteur (30).
PCT/JP2021/018892 2020-05-25 2021-05-19 Pompe de vidange WO2021241340A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202180037456.3A CN115698510A (zh) 2020-05-25 2021-05-19 排水泵

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020-090875 2020-05-25
JP2020090875A JP7442803B2 (ja) 2020-05-25 2020-05-25 排水ポンプ

Publications (1)

Publication Number Publication Date
WO2021241340A1 true WO2021241340A1 (fr) 2021-12-02

Family

ID=78744557

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/018892 WO2021241340A1 (fr) 2020-05-25 2021-05-19 Pompe de vidange

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JP (1) JP7442803B2 (fr)
CN (1) CN115698510A (fr)
WO (1) WO2021241340A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7485388B2 (ja) 2022-06-20 2024-05-16 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
JP2003262355A (ja) * 2002-03-08 2003-09-19 Saginomiya Seisakusho Inc 水位検知器付き空気調和機用排水ポンプ
JP2012127281A (ja) * 2010-12-16 2012-07-05 Saginomiya Seisakusho Inc 空気調和機用排水ポンプ
JP2013194671A (ja) * 2012-03-22 2013-09-30 Fuji Koki Corp 排水ポンプ
JP2020169639A (ja) * 2019-04-01 2020-10-15 合利美股▲分▼有限公司 遮音機能付き排水ポンプ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003262355A (ja) * 2002-03-08 2003-09-19 Saginomiya Seisakusho Inc 水位検知器付き空気調和機用排水ポンプ
JP2012127281A (ja) * 2010-12-16 2012-07-05 Saginomiya Seisakusho Inc 空気調和機用排水ポンプ
JP2013194671A (ja) * 2012-03-22 2013-09-30 Fuji Koki Corp 排水ポンプ
JP2020169639A (ja) * 2019-04-01 2020-10-15 合利美股▲分▼有限公司 遮音機能付き排水ポンプ

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Publication number Publication date
JP2021188515A (ja) 2021-12-13
CN115698510A (zh) 2023-02-03
JP7442803B2 (ja) 2024-03-05

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