EP4242465A1 - Gebläse - Google Patents

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Publication number
EP4242465A1
EP4242465A1 EP23160305.1A EP23160305A EP4242465A1 EP 4242465 A1 EP4242465 A1 EP 4242465A1 EP 23160305 A EP23160305 A EP 23160305A EP 4242465 A1 EP4242465 A1 EP 4242465A1
Authority
EP
European Patent Office
Prior art keywords
annular rib
air inlet
upper housing
inlet opening
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.)
Pending
Application number
EP23160305.1A
Other languages
English (en)
French (fr)
Inventor
Chin-Ni Lee
Neng Yu Pan
Ching-Liang Yu
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.)
Growtrend Biomedical Co Ltd
Original Assignee
Growtrend Biomedical Co Ltd
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 Growtrend Biomedical Co Ltd filed Critical Growtrend Biomedical Co Ltd
Publication of EP4242465A1 publication Critical patent/EP4242465A1/de
Pending 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid 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
    • F04D29/16—Sealings between pressure and suction sides
    • F04D29/161—Sealings between pressure and suction sides especially adapted for elastic fluid pumps
    • F04D29/162—Sealings between pressure and suction sides especially adapted for elastic fluid pumps of a centrifugal flow wheel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/10—Centrifugal pumps for compressing or evacuating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings

Definitions

  • the present utility model relates to an air delivery device, especially a blower with the noise reduction effect.
  • a blower is a device that uses the pressure difference to make the fluid flow for air delivery, as shown in Fig. 6 .
  • a conventional blower generally comprises a casing 50, which is composed of an upper part 51 and a lower part 52.
  • the casing 50 forms an inner space 53 inside.
  • the casing 50 has a cylindrical shape, and a center of the upper part 51 forms an air inlet opening 54 that communicates with the inner space 53.
  • An air outlet tube 55 extends along the peripheral side of the casing 50 and communicates with the inner space 53 at the end of the air outlet tube 55.
  • a motor 56 is mounted on the lower part 52 of the casing 50, and the driving shaft 561 of the motor 56 can output power and protrude into the inner space 53 of the casing.
  • a fan 57 is installed inside the casing 50, and a rotation center of the fan 57 is fixedly connected to the driving shaft 561 and corresponds to the position of the air inlet opening 54 of the upper part 51 in location.
  • an external fluid enters the inner part through the air inlet opening 54, passes through a central upper part of the fan 57, and is pressurized and pushed out by the fan 57, and then flows through the peripheral surface of the fan 57 and output through the air outlet tube 55.
  • the upper part 51 of the blower casing is formed by a plate with approximately the same thickness or by other current metalworking techniques, the upper and lower surfaces of the upper part 51 adjacent to the air inlet opening 54 are flat. Because the air inlet opening 54 is formed through the upper part 51, when the external fluid enters rapidly through the air inlet opening 54, most of the fluid enters the inner part through the central upper part of the fan 57 and is pressurized and pushed out. However, a portion of the fluid passes through the gap between the upper part 51 of the casing and a top surface of the fan 57, which will cause annoying noise problems and disadvantages.
  • the inventor has redesigned and improved the first annular rib and the second annular rib respectively protruding from the edge of the air inlet opening and the inner bottom surface of the upper housing, so that the fluid flows through the air inlet opening can be smoother to reduce noise and provide better noise reduction effect.
  • the technical means used in the present utility model is to provide a blower, which includes an upper housing, a lower housing, a fan, and a motor.
  • the upper housing is connected with the lower housing and thus composes a casing.
  • the casing is a hollow cylinder, inside forms an air flow space and an air outlet passage connected with the air flow space.
  • the upper housing has an air inlet opening formed through a center thereof.
  • the upper housing has a first annular rib on an edge of the air inlet opening.
  • the fan is located between the upper housing and the lower housing.
  • An air inlet hole is formed at an upper portion of the fan and multiple flow paths are formed in the fan. The air inlet hole corresponds to the air inlet opening of the upper housing in location.
  • Each one of the flow paths has one end connected to the air inlet hole and another end connected to the air flow space of the casing.
  • the motor is mounted out of the lower housing and includes a driving shaft.
  • the driving shaft has an end mounted through the lower housing and protrudes into the air flow space to be fixed with the fan.
  • the blower further has a second annular rib protruding from an inner bottom surface of the upper housing and adjacent to the air inlet opening.
  • the second annular rib has an outer peripheral surface and an inner peripheral surface.
  • the inner peripheral surface is adjacent to the first annular rib and a diameter of the first annular rib is smaller than that of the second annular rib.
  • the first annular rib and the second annular rib are arranged in concentric circles.
  • a portion of the upper housing located between the first annular rib and the second annular rib forms an annular recess on an inner and bottom surface thereof and concaved upward. An edge of the air inlet opening corresponds to the annular recess.
  • a cross-sectional shape of the first annular rib and a cross-sectional shape of the second annular rib are arc-shaped.
  • an angle (A) between the inner bottom surface of the upper housing and the outer peripheral surface of the second annular rib is preferably 70 to 90 degrees.
  • the fan has an upper plate and a lower plate. Multiple blades are located between the upper plate and the lower plate. The flow paths are formed between two of the blades.
  • An inner annular rib is formed on an edge of the air inlet hole and located above the upper plate.
  • An outer annular rib is formed on an outer peripheral surface.
  • a middle annular rib is formed between the inner annular rib and the outer annular rib. The inner annular rib, the middle annular rib, and the outer annular rib are arranged in concentric circles.
  • the upper housing and the lower housing of this utility model are combined as a casing and a fan is mounted inside.
  • a rotating center of the fan is connected with the driving shaft of the motor set at a bottom of the lower housing.
  • a first annular rib and a second annular rib respectively protrude from an edge of the air inlet opening and an inner bottom surface of the upper housing.
  • the cross-sectional shapes of the first annular rib and the second annular rib are both arc-shaped. With the arc-shaped the first annular rib and the second annular rib, when an external fluid is driven by the fan, passes the air inlet opening, and enters the upper housing and the lower housing, the fluid can pass smoothly and enter the air inlet hole of the fan.
  • the sound of wind cutting is reduced, and most of the airflow can be pressurized and then output from the air outlet duct.
  • a small part of the escaped air enters a gap between a top of the fan and an inner surface of the upper housing, and then is blocked by the second annular rib and changes the direction of flow downward, which forms an air curtain.
  • the blower can prevent the escaped airflow from continually escaping to the air inlet opening which generates wind noise. Therefore, the blower enhances the quietness effect.
  • the blower of the present utility model comprises an upper housing 10, a lower housing 20, a fan 30, and a motor 40.
  • the upper housing 10 and the lower housing 20 mutually abut and form a casing, which is a hollow cylinder that forms an air flow space 100 inside.
  • the fan 30 is disposed between the upper housing 10 and the lower housing 20.
  • the motor 40 is located out of the lower housing 20.
  • the motor 40 comprises a driving shaft 41 that penetrates the lower housing 20 and protrudes into the air flow space 100, and thus the driving shaft 41 is fixedly coupled with the rotating center of the fan 30.
  • the upper housing 10 has an air inlet opening 11 formed therethrough.
  • the upper housing 10 has a first annular rib 111 formed on an edge of the air inlet opening 11.
  • the first annular rib 111 has an arc-shaped profile.
  • the upper housing 10 has a second annular rib 112 protruding from an inner bottom surface of the upper housing 10 and adjacent to the air inlet opening 11.
  • the second annular rib 112 has an arc-shaped profile at a protruding end.
  • the second annular rib 112 includes an outer peripheral surface 1121 and an inner peripheral surface. The inner peripheral surface is adjacent to the first annular rib 111.
  • An angle A is formed between the inner bottom surface of the upper housing 10 and the outer peripheral surface 1121 of the second annular rib 112 with a preferable implementation angle of 70 to 90 degrees.
  • the cross-sectional shapes of the first annular rib 111 and the second annular rib 112 are both arc-shaped.
  • the first annular rib 111 is located higher than the second annular rib 112 to form a progressively increasing height configuration.
  • the diameter of the first annular rib 111 is smaller than that of the second annular rib 112, and the first annular rib 111 and the second annular rib 112 are arranged in concentric circles.
  • An annular recess 113 is formed on the inner bottom surface of the upper housing 10 between the first annular rib 111 and the second annular rib 112.
  • the upper housing 10 has a lower annular flow passage 12 and an upper air outlet passage 13.
  • the lower annular flow passage 12 is formed in the upper housing 10.
  • the upper air outlet passage 13 protrudes out of the upper housing 10.
  • the lower annular flow passage 12 and the upper air outlet passage 13 communicate with each other in space.
  • the thickness of the upper housing 10 adjacent to the air inlet opening 11 gradually decreases towards the air inlet opening 11 and then forms the first annular rib 111.
  • the lower housing 20 has a base 21.
  • the base 21 is concave on a bottom of the lower housing 20 and protrudes upwardly at a center of the lower housing 20.
  • the base 21 has a through hole formed through a center thereof.
  • the lower housing 20 forms a lower annular flow passage 22 inside and a lower air outlet passage 23 protruding at the periphery.
  • the lower annular flow passage 22 and the lower air outlet passage 23 communicate with each other. After the upper housing 10 and the lower housing 20 are stacked and combined with each other, the lower air outlet passage 23 and the upper air outlet passage 13 together form an air outlet passage that communicates with the air flow space 100 inside the casing.
  • the motor 40 is installed and assembled within the base 21 of the lower housing 20.
  • the driving shaft 41 of the motor 40 passes through the through hole of the base 21.
  • the fan 30 is a component of the current technique.
  • the fan 30 comprises an upper plate 32, a lower plate 34, and multiple blades 31 formed between the upper plate 32 and the lower plate 34.
  • the blades 31 are spaced apart and arranged radially, with flow paths for fluid (e.g., air) to pass through spaces formed between the blades 31.
  • the lower plate 34 which is a lower portion of the fan 30, forms a hole 33 at a center thereof.
  • the hole 33 is fitted and fixed to the driving shaft 41.
  • the upper plate 32 which is an upper portion of the fan 30, forms an air inlet hole 320 at a center thereof.
  • the air inlet hole 320 communicates with an interior of the fan 30 and corresponds to the air inlet opening 11 of the upper housing 10 in position.
  • An inner annular rib 321 is formed on an edge of the air inlet hole 320 on the upper plate 32 of the fan 30.
  • An outer annular rib 323 is formed on the outer peripheral edge of the upper plate 32.
  • a middle annular rib 322 is formed between the inner annular rib 321 and the outer annular rib 323.
  • the inner annular rib 321, the middle annular rib 322, and the outer annular rib 323 are arranged concentrically.
  • a fluid L enters the interior of the fan 30 through the air inlet opening 11 and the air inlet hole 320, passes through the flow paths between the blades 31, enters the air flow space 100 between the upper housing 10 and the lower housing 20, and can be outputted through the air outlet passage.
  • the edge of the air inlet hole 32 corresponds to the annular recess 113 between the first annular rib 111 and the second annular rib 112 in location.
  • the rotating fan 30 draws external fluid L into the casing through the air inlet opening 11, and then enters the interior of the fan 30 through the air inlet hole 320. Due to the arc-shaped design of the first annular rib 111 and the smaller diameter of the air inlet opening 11 compared to that of the air inlet hole 320, the fluid L can smoothly pass along a surface of the air inlet opening 11 and then enter the air inlet hole 320. The fluid L flows through spaces between the plurality of blades 31, and then is discharged through the space between the lower annular flow passage 12 and the lower annular flow passage 13, and the space between the upper air outlet passage 13 and the lower air outlet passage 23.
  • a branch fluid L1 (represented by solid arrow in Fig. 3 and Fig. 4 ). Due to the obstruction of the outer peripheral surface 1121 of the second annular rib 112, the airflow of the branch fluid L1 may change direction and turn into a flow that is perpendicular to the direction of the branching fluid L1. The flow of fluid L1 will continue to flow downward and form an air curtain.
  • the air curtain can prevent the airflow from continually escaping to the air inlet opening 11 and the air inlet hole 320 which generate wind noise. Therefore, the blower enhances the quietness effect.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP23160305.1A 2022-03-07 2023-03-06 Gebläse Pending EP4242465A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW111202238U TWM629128U (zh) 2022-03-07 2022-03-07 鼓風機

Publications (1)

Publication Number Publication Date
EP4242465A1 true EP4242465A1 (de) 2023-09-13

Family

ID=83437249

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23160305.1A Pending EP4242465A1 (de) 2022-03-07 2023-03-06 Gebläse

Country Status (4)

Country Link
US (1) US20230279870A1 (de)
EP (1) EP4242465A1 (de)
JP (1) JP2023130328A (de)
TW (1) TWM629128U (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1479917A1 (de) * 2003-05-22 2004-11-24 Nidec Shibaura Corporation Lüfter
US20130017078A1 (en) * 2011-07-14 2013-01-17 Black & Decker Inc. Impeller arrangement
US20160264028A1 (en) * 2013-10-21 2016-09-15 Denso Corporation Centrifugal blower
US20160290358A1 (en) * 2015-03-30 2016-10-06 Nidec Corporation Centrifugal fan
US20190055957A1 (en) * 2017-08-21 2019-02-21 Rinnai Corporation Centrifugal fan
US20190093665A1 (en) * 2016-02-24 2019-03-28 Denso Corporation Centrifugal blower

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1479917A1 (de) * 2003-05-22 2004-11-24 Nidec Shibaura Corporation Lüfter
US20130017078A1 (en) * 2011-07-14 2013-01-17 Black & Decker Inc. Impeller arrangement
US20160264028A1 (en) * 2013-10-21 2016-09-15 Denso Corporation Centrifugal blower
US20160290358A1 (en) * 2015-03-30 2016-10-06 Nidec Corporation Centrifugal fan
US20190093665A1 (en) * 2016-02-24 2019-03-28 Denso Corporation Centrifugal blower
US20190055957A1 (en) * 2017-08-21 2019-02-21 Rinnai Corporation Centrifugal fan

Also Published As

Publication number Publication date
TWM629128U (zh) 2022-07-01
JP2023130328A (ja) 2023-09-20
US20230279870A1 (en) 2023-09-07

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