WO2018040448A1 - 离心风机 - Google Patents

离心风机 Download PDF

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Publication number
WO2018040448A1
WO2018040448A1 PCT/CN2016/113936 CN2016113936W WO2018040448A1 WO 2018040448 A1 WO2018040448 A1 WO 2018040448A1 CN 2016113936 W CN2016113936 W CN 2016113936W WO 2018040448 A1 WO2018040448 A1 WO 2018040448A1
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WO
WIPO (PCT)
Prior art keywords
air
centrifugal fan
air outlet
motor
peripheral wall
Prior art date
Application number
PCT/CN2016/113936
Other languages
English (en)
French (fr)
Inventor
费斌
程学丽
李登强
朱小兵
李春阳
Original Assignee
青岛海尔股份有限公司
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 青岛海尔股份有限公司 filed Critical 青岛海尔股份有限公司
Publication of WO2018040448A1 publication Critical patent/WO2018040448A1/zh

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    • 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
    • F04D17/06—Helico-centrifugal 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
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F04D25/10—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provisions for automatically changing direction of output air
    • 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
    • F04D29/30—Vanes
    • 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
    • F04D29/4246—Fan casings comprising more than one outlet
    • 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
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears

Definitions

  • the invention relates to the technical field of fan air supply, in particular to a centrifugal fan.
  • the existing centrifugal fan is only provided with one air outlet.
  • the provision of external joints not only increases the cost but also greatly increases the air supply resistance, so that the air volume is reduced. The air supply efficiency is low.
  • a further object of the invention is to provide a centrifugal fan with a reasonable structural layout and a compact structure.
  • Another further object of the present invention is to provide a smooth flow of the centrifugal fan with low noise.
  • the present invention provides a centrifugal fan comprising:
  • a housing having a bottom shell portion, a peripheral wall portion and a cover portion, the cover portion is provided with an air inlet opening, and the peripheral wall portion is provided with a plurality of air outlets;
  • a wind wheel assembly having a wind turbine motor and a plurality of blades; the wind turbine motor being mounted to the bottom casing portion; the plurality of blades being located within the casing and along a circumference of the wind turbine motor Directionally arranged to cause airflow from the air inlet to the housing and out of the housing via one or more of the plurality of air outlets, driven by the wind turbine motor;
  • the air supply control device is rotatably disposed in the housing and has one or more shielding portions;
  • a transmission mechanism configured to transmit a rotational motion of the output of the adjustment motor to the air supply control device to rotate the one or more shielding portions to different rotational positions for each of the air outlets Fully shielded, partially obscured or fully exposed to adjust the respective plurality of air outlets The area of the wind.
  • each of the blades includes a first section and a second section sequentially disposed in a radial direction of the wind turbine motor, the first section and the second section being perpendicular to
  • the projections in the plane of the axis of rotation of the wind turbine motor are all circular arcs, and the arching directions of the first section and the second section are opposite.
  • the first segment and the second segment have a radius ratio of 0.18 to 0.3;
  • the central angle of the first section ranges from 15° to 22°;
  • the central angle of the second section ranges from 38° to 46°.
  • each of the blades gradually becomes thicker in a direction from the cover portion toward the bottom case portion.
  • the wind wheel assembly further includes a casing, and an annular bottom plate extending outward from the opening of the casing, an angle between a circumferential side of the casing and an axis of the casing 30° to 40°; and a stator of the wind turbine motor is mounted to the bottom casing portion, a rotor of the wind turbine motor is mounted in the casing; and each of the blades is from the annular bottom plate Extending toward the surface of the cover.
  • the housing further includes a motor receiving portion disposed outside the peripheral wall portion;
  • the adjustment motor is mounted to the motor housing.
  • the transmission mechanism comprises:
  • a ring gear meshing with the gear rotatably mounted to an end of the peripheral wall portion away from the bottom casing portion, or rotatably mounted to an inner side surface of the bottom casing portion;
  • the one or more shutters extend from the ring gear in a direction parallel to the axis of the ring gear.
  • the axis of rotation of the wind wheel assembly is parallel and spaced apart from the axis of the peripheral wall portion to bias the wind wheel assembly within the housing;
  • the centrifugal fan further includes a collecting plate disposed in the casing, the wind wheel assembly and the plurality of air outlets are located on the same side of the collecting plate, and the collecting plate faces away from the wind wheel The direction of the assembly is arched and configured to cause airflow exiting the rotor assembly to flow to the plurality of air outlets.
  • the centrifugal fan further includes a flow dividing device disposed in the housing, configured to guide the airflow flowing out of the wind wheel assembly, and to cause the airflow flowing out of the wind wheel assembly to flow to each of the air outlets at a predetermined ratio .
  • the air supply control device further includes at least one circulation portion, the shielding portion and the The circulation portion is sequentially disposed along a circumferential direction of the peripheral wall portion, and the one or more shielding portions and the at least one circulation portion enclose a cylindrical structure, and each of the circulation portions is provided with one or more Flow hole
  • the blower control device is further configured to cause airflow into the partially shielded or fully exposed air vent via the flow apertures in the at least one flow-through when it is rotated to a different rotational position.
  • the centrifugal fan of the present invention has a plurality of air outlets
  • the plurality of air outlets can be controllably shielded by the rotation of the air supply control device, so that air can be blown to multiple directions/multiple places at the same time, and can be aligned
  • the wind direction/air supply place is selected and the air volume of each air outlet is adjusted to achieve reasonable air supply.
  • the air supply can be made smoother, the air supply amount is larger, and the noise is lower.
  • the centrifugal fan has a reasonable structural layout, a compact structure and an beautiful appearance.
  • the centrifugal fan of the present invention has a collecting plate and a deflector, the air blowing smoothness can be improved, the air blowing noise can be reduced, and the air volume flowing to each air outlet can be pre-allocated to be more precise.
  • the amount of air leading to each air outlet is quantified and then adjusted by the air supply control device.
  • FIG. 1 is a schematic structural view of a centrifugal fan according to an embodiment of the present invention.
  • FIG. 2 is a schematic exploded view of a centrifugal fan in accordance with one embodiment of the present invention
  • Figure 3 is a schematic exploded view of a partial structure of a centrifugal fan in accordance with one embodiment of the present invention
  • FIG. 4 is a schematic structural view of a rotor assembly in a centrifugal fan according to an embodiment of the present invention.
  • FIG. 1 is a schematic structural view of a centrifugal fan according to an embodiment of the present invention
  • FIG. 2 and FIG. There are respectively a schematic exploded view of a centrifugal fan and a schematic exploded view of a partial structure according to an embodiment of the present invention.
  • an embodiment of the present invention provides a centrifugal fan.
  • the centrifugal fan may include a housing 20, a rotor assembly 30, a blower control device 40, an adjustment motor 50, and a transmission mechanism 60.
  • the housing 20 may have a bottom case portion 21, a peripheral wall portion 22, and a cover portion 23.
  • the bottom case portion 21 may have a plate shape
  • the peripheral wall portion 22 may have a cylindrical shape
  • the cover portion 23 may be a cover plate.
  • the peripheral wall portion 22 may be integrally formed with the bottom case portion 21, that is, the peripheral wall portion 22 extends from the bottom case portion 21 toward the cover plate.
  • the cover portion 23 is engageable in a card hole on the outer side surface of the peripheral wall portion 22 by a snap extending from the edge thereof toward the bottom case portion 21.
  • the peripheral wall portion 22 may be integrally formed with the cover portion 23, that is, the peripheral wall portion 22 extends from the cover plate toward the bottom casing portion 21.
  • the cover portion 23 is provided with an air inlet
  • the peripheral wall portion 22 is provided with a plurality of air outlets.
  • the plurality of air outlets may be three, such as the first air outlet 221, the second air outlet 222, and the third air outlet 223.
  • the plurality of air outlets It can also be 2, 4, 5, etc.
  • the wind wheel assembly 30 can have a wind turbine motor 31 and a plurality of blades 32.
  • the wind turbine motor 31 is attached to the bottom case portion 21.
  • a plurality of blades 32 are located in the casing 20 and are evenly disposed along the circumferential direction of the wind turbine motor 31 to cause airflow from the air inlet to the casing 20 and through the plurality of air outlets by the wind turbine motor 31.
  • the axis of rotation of the rotor assembly 30 is preferably disposed coaxially with the air inlet.
  • the air supply control device 40 is rotatably disposed within the housing 20 and may have one or more shielding portions.
  • the shielding portion is preferably a shielding plate that is disposed coaxially with the peripheral wall. When there are a plurality of shielding portions, they are sequentially spaced apart in the circumferential direction of the peripheral wall portion 22.
  • the air supply control device 40 is rotatably disposed in the housing 20 to cause the one or more shielding portions to be completely shielded, partially shielded or completely exposed to each of the air outlets at different rotational positions, thereby adjusting the plurality of outlets.
  • the outlet area of each outlet is rotatably disposed within the housing 20 and may have one or more shielding portions.
  • the shielding portion is preferably a shielding plate that is disposed coaxially with the peripheral wall. When there are a plurality of shielding portions, they are sequentially spaced apart in the circumferential direction of the peripheral wall portion 22.
  • the air supply control device 40 is rotatably disposed in the housing
  • the air supply control device 40 can be configured to be controlled to rotate about the axis of the peripheral wall portion 22 to different rotational positions to completely shield, partially shield or completely expose each of the air outlets, thereby adjusting a plurality of outlets.
  • the outlet area of each outlet can be configured to be controlled to rotate about the axis of the peripheral wall portion 22 to different rotational positions to completely shield, partially shield or completely expose each of the air outlets, thereby adjusting a plurality of outlets.
  • the adjustment motor 50 may be disposed radially outward of the peripheral wall portion 22.
  • the housing 20 further includes a motor housing portion 24 disposed outside the peripheral wall portion 22, and the adjustment motor 50 is mounted to the motor housing portion 24.
  • the transmission mechanism 60 can be configured to transmit the rotational motion of the output of the adjustment motor 50 to the air supply control device 40 to rotate the one or more shielding portions to different rotational positions, and completely shield and partially shield each air outlet. Or completely exposed.
  • the centrifugal fan in the embodiment of the present invention has a plurality of air outlets, it is possible to output airflow in a plurality of directions or a plurality of places.
  • the air supply control device 40 can controllably distribute the airflow flowing from the air inlet to the plurality of air outlets, and can control the opening and closing of the air outlet ducts connected to each air outlet and/or for each air outlet.
  • the air volume in the channel is adjusted.
  • it can be used to meet the cooling demand of different storage rooms, or the cooling demand at different locations of a storage room, or a storage room.
  • the cooling capacity of different storage spaces Adjusting the special setting position of the motor 50 and the transmission mechanism 60 can also make the layout of the centrifugal fan more reasonable and the structure more compact.
  • each of the blades 32 includes a first section 321 and a second section 322 which are sequentially disposed in the radial direction of the wind turbine motor 31, and the first section 321
  • the projections of the second section 322 in a plane perpendicular to the axis of rotation of the rotor motor 31 are all circular arcs, and the arching directions of the first section 321 and the second section 322 are opposite.
  • the radius ratio of the first section 321 and the second section 322 is 0.18 to 0.3.
  • the central angle of the first section 321 ranges from 15° to 22°.
  • the central angle of the second section 322 ranges from 38° to 46°.
  • each of the blades 32 may be designed to gradually become thicker in a direction directed from the cover portion 23 toward the bottom case portion 21.
  • the wind wheel assembly 30 may further include a casing 33 and an annular bottom plate 34 extending outwardly from the opening of the casing 33.
  • the angle between the circumferential side of the casing 33 and the axis of the casing 33 is 30 to 40.
  • the circumferential side surface of the casing 33 and the top end surface of the casing 33, and the annular bottom plate 34 are arc-shaped transition surfaces, and the length of the circumferential side surface is 3 to 5 times the radius of the circular arc-shaped transition surface.
  • the stator 311 of the wind turbine motor 31 is attached to the bottom casing portion 21, and the rotor 312 of the wind turbine motor 31 is mounted in the casing 33.
  • Each of the blades 32 extends from the surface of the annular bottom plate 34 toward the cover portion 23.
  • the wind wheel assembly 30 may further include a reinforcing ring 35 disposed on the outer side of the corners of the plurality of blades 32 adjacent to the cover portion 23 and the peripheral wall portion 22, and through a plurality of connecting plates It is integrally formed with a plurality of blades 32.
  • the thickness of the web is less than the thickness of the blade 32.
  • the transmission mechanism 60 can include a gear 61 and a ring gear 62 that meshes with the gear 61.
  • the gear 61 is mounted on the output shaft of the adjustment motor 50.
  • the ring gear 62 is rotatably attached to one end of the peripheral wall portion 22 away from the bottom case portion 21, or rotatably attached to the inner side surface of the bottom case portion 21.
  • one or more shields extend from the ring gear 62 in a direction parallel to the axis of the ring gear 62.
  • the ring gear 62 may include a turntable, an annular rib on one side of the turntable, and a plurality of teeth formed on the outer side of the annular rib.
  • One or more obscurations may be located on the other side of the turntable.
  • the inner side surface of the bottom case portion 21 may be formed with An annular groove, the annular rib being rotatably mounted in the annular groove.
  • the end portion of the peripheral wall portion 22 may be formed with a step to abut against the side of the turntable having the shielding portion, and the inner surface of the cover portion 23
  • An annular groove may also be provided to accommodate the annular rib.
  • the bottom casing portion 21 can also extend out of the clamping wall portion to form a guiding clip groove with the inner surface of the peripheral wall portion 22, in which one or more shielding portions can move.
  • a through hole that allows the gear 61 to mesh with the ring gear 62 is formed on the upper wall portion 22, the bottom case portion 21, or the cover portion 23.
  • the air supply control device 40 further includes a swivel portion having an annular shape or an arc shape, and the swivel portion is rotatably mounted to the housing 20, one or more The shielding portion extends from the rotating portion along the axis of the rotating portion.
  • the seat portion has an annular shape.
  • the ring gear 62 of the transmission mechanism 60 can be mounted to the swivel portion, and the ring gear 62 and the shielding portion are located on both sides of the swivel portion.
  • the adjustment motor 50 is disposed radially outward of the peripheral wall portion 22, that is, radially outward of the shielding portion.
  • the transmission mechanism 60 is configured to decelerately transmit the rotational motion of the output of the adjustment motor 50 to the air supply control device 40. That is, in this embodiment, the inventors have proposed to use the transmission mechanism 60 to weaken the sloshing effect of the output shaft of the adjustment motor 50 so that the indexing of the air supply control device 40 is accurate.
  • the deceleration and torsion function of the transmission mechanism 60 also eliminates the jamming phenomenon of the adjustment motor 50.
  • the special position of the adjusting motor 50 can reduce the overall thickness of the centrifugal fan and save space for use in the refrigerator.
  • the turntable of the swivel portion or the ring gear 62 also makes the movement of the blower control device 40 in the centrifugal adjustment motor 50 smoother.
  • the adjustment motor 50 that drives the blower control device 40 can be a stepper motor, particularly a DC stepper motor.
  • the predetermined reduction ratio may range from 5 to 10.
  • the reduction ratio is 8, and the angle at which the air supply control device 40 continues to rotate may be less than or equal to a preset value when the adjustment motor 50 is rotated to a predetermined position. (such as 0.2 °).
  • a predetermined position such as 0.2 °.
  • the upper gear 61 and the output shaft of the adjusting motor 50 can continue to rotate at an angle of less than or equal to 1°, and the motion is transmitted to the ring gear 62 under the action of the transmission mechanism 60 having a predetermined reduction ratio (such as a predetermined reduction ratio of 8).
  • a predetermined reduction ratio such as a predetermined reduction ratio of 8
  • the angle at which the ring gear 62 and the air supply control device 40 continue to rotate may be 0.125°, which greatly improves the rotation accuracy of the air supply control device 40.
  • the wind wheel assembly 30 The axis of rotation is parallel and spaced from the axis of the peripheral wall portion 22 to bias the rotor assembly 30 within the housing 20.
  • the centrifugal fan may further include a collecting plate (not shown).
  • the flow plate may be disposed within the housing 20.
  • the wind wheel assembly 30 and the plurality of air outlets are located on the same side of the flow collecting plate.
  • the flow plates are arched away from the wind wheel assembly 30 and are configured to cause airflow out of the wind wheel assembly 30 to flow to the plurality of air outlets.
  • the collecting plate may be a circular arc plate, an involute plate or a volute plate or the like.
  • the wind wheel assembly 30 and the adjustment motor 50 may be located on both sides of the collecting plate.
  • the centrifugal fan further includes a flow dividing device (not shown) disposed within the housing 20 configured to direct airflow exiting the rotor assembly 30 and to cause airflow out of the rotor assembly 30. Flow to each air outlet at a predetermined ratio.
  • the flow dividing device and the air supply control device 40 cooperatively control the branch air supply device to controllably shield the plurality of air outlets by the splitting action of the flow dividing device and the air supply control device 40. The function realizes the selection of the outlet air and the adjustment of the air volume of each air outlet, thereby adjusting the working state and the air volume of each air outlet.
  • the flow dividing device includes a plurality of baffles, each of which is configured to flow airflow from the wind turbine assembly 30 from both sides of the baffle to two adjacent air outlets.
  • Each of the baffles and the converging plates extend from the cover portion 23 toward the bottom casing portion 21, and optionally also from the bottom casing portion 21.
  • One end of each of the baffles adjacent to the peripheral wall portion 22 is spaced from the peripheral wall portion 22 to define a yielding passage that allows the blowing control device 40 to rotate.
  • Both ends of the collecting plate are spaced apart from the peripheral wall portion 22 to define a yielding passage that allows the blowing control device 40 to rotate to facilitate the rotation of the blower control device 40.
  • the number of air outlets is three, and the three air outlets are a first air outlet 221, a second air outlet 222, and a third air outlet 223, respectively, spaced apart in the circumferential direction of the peripheral wall portion 22.
  • Each of the air outlets forms a central angle of projection on the bottom casing portion 21 of about 35 to 55 degrees.
  • the rotation axis of the wind wheel assembly 30 and the two end edges of the plurality of air outlets (the side of the first air outlet 221 away from the second air outlet 222, the side of the third air outlet 223 away from the second air outlet 222)
  • the angle between the faces is between 110° and 140°.
  • the distance between the rotation axis of the wind wheel assembly 30 and one end edge of the plurality of air outlets (the side of the first air outlet 221 away from the second air outlet 222), and the rotation axis of the wind wheel assembly 30 are multiple
  • the ratio between the distances between the other end edges of the tuyere (the side of the third air outlet 223 that is away from the second air outlet 222) is 5/12 to 5/8.
  • the deflector can be provided with two, which are a first baffle and a second baffle, respectively.
  • the first baffle is configured to flow the first air outlet 221 and the first
  • the second air outlet 222 has a second air outlet 222 and a third air outlet 223.
  • the surface of the first baffle on the side of the first air outlet 221 is a plane, and the angle between the plane of the edge of the first air outlet 221 is 65° to 80°; the first baffle is located at the second
  • the surface on the side of the air outlet 222 is a curved surface at the inlet of the airflow, and the flow guiding surface is a plane; the angle between the two planes on both sides of the first deflector is 5° to 20°.
  • the surface of the second baffle on the side of the second air outlet 222 is a plane, and the surface of the second baffle on the side of the third air outlet 223 is also a plane, and the plane between the two planes of the second baffle The angle is 3° to 18°.
  • the angle between the plane of the first baffle on the side of the second air outlet 222 and the plane of the second baffle on the side of the second air outlet 222 is 15° to 35°, so that the channel flows along the airflow. Gradually.
  • the length of the second baffle may be 3.5 to 4 times the length of the first baffle.
  • the first baffle, the second baffle, the peripheral wall portion 22, and the collecting plate can limit the air volume ratio of the first air outlet 221, the second air outlet 222, and the third air outlet 223 to about 65%:25 %: 10%, which can accurately quantify the air outlet of each air outlet.
  • the air supply control device 40 further includes at least one flow portion, and the shielding portion and the flow portion are sequentially disposed in the circumferential direction of the peripheral wall portion 22, and one Or the plurality of shielding portions and the at least one circulation portion enclose a cylindrical structure, and each of the circulation portions is provided with one or more circulation holes.
  • the air supply control device 40 is also configured to cause airflow into the partially shielded or fully exposed air outlet via the flow apertures in the at least one flow-through when it is rotated to a different rotational position.
  • the boundary between the flow-through portion and the shield portion is understood to be the outermost two edge of the hole extending in the axial direction of the peripheral wall portion 22 of the flow-through hole on the flow-through portion (also referred to as vertical To the edge), or to the sides of the two holes to expand to the sides after about 3 to 10 mm.
  • the two vertical edges of the hole may be the boundary between the flow portion and the shield portion.
  • a plurality of flow holes are preferably arranged in the circumferential direction of the peripheral wall portion 22, and the plurality of flow holes are understood as a single body, and the two outer side vertical edges of the outermost two holes are The boundary between the circulation portion and the shielding portion.
  • each of the obscuring portions and the flow-through portion are preferentially disposed at a surface edge of the turntable.
  • the outer side surface of each of the shielding portions can be sealed and attached to the inner side surface of the peripheral wall portion 22 at all times, so that the shielding plate can be controlled to open or close at a different rotational position. Or multiple air outlets.
  • a gasket (not shown) may be provided at both ends of the outer side surface of each of the shielding portions in the rotational direction thereof.
  • a gasket may also be provided between every two adjacent flow holes on each flow portion.
  • the opening and closing of the plurality of air outlets and the shielding area can be simultaneously adjusted.
  • a part of the air outlets when one or more shielding portions of the air supply control device 40 are rotated, a part of the air outlets may be in a closed state, and a part of the air outlets may be in an open state for better selection and delivery.
  • the number of air outlets may be three, including the first air outlet 221, the second air outlet 222, and the third air outlet 223.
  • the first air outlet 221, the second air outlet 222, and the third air outlet 223 may be sequentially spaced in the circumferential direction of the peripheral wall portion 22 and may be sequentially reversed in the counterclockwise direction (counterclockwise from the cover portion 23 toward the bottom case portion 21).
  • the central angle of the spacing between the two air outlets may preferably be 5° to 20°.
  • the number of the shielding portion and the circulation portion are both two.
  • the two shielding portions include a first shielding portion and a second shielding portion.
  • the two flow passage portions include a first flow-through portion and a second flow-through portion, which are sequentially spaced apart in the circumferential direction of the peripheral wall portion 22 and in the clockwise direction.
  • the first obscuration portion is configured to allow it to completely obscure an air outlet.
  • the second shielding portion is configured to allow it to at least completely shield the two air outlets, for example, the second shielding portion can at least completely shield the three air outlets.
  • a flow hole is formed in the first flow portion, and three flow holes are sequentially disposed at intervals in the circumferential direction of the peripheral wall portion 22, and each of the flow holes is configured to allow it to completely expose an air outlet, and The three flow holes on the second flow portion are configured to allow them to completely expose the three air outlets.
  • the centrifugal fan when the centrifugal fan is in operation, when the first shielding portion and the second shielding portion are rotated to a certain position, the three circulation holes on the second circulation portion may make the first air outlet 221, the second air outlet 222 and the third outlet The tuyes 223 are all open.
  • the second shielding portion can completely shield the second air outlet 222 and the third air outlet 223, and the circulation hole on the second circulation portion can make the first out The tuyere 221 is in a fully exposed state.
  • the first shielding portion and the second shielding portion When the first shielding portion and the second shielding portion are rotated to a certain position, the first shielding portion can completely shield the third air outlet 223, and the second shielding portion can completely shield the first air outlet 221, the first flow portion The flow holes allow the second air outlet 222 to be fully exposed.
  • the second shielding portion When the first shielding portion and the second shielding portion are rotated to a certain position, the second shielding portion completely shields the first air outlet 221 and the second air outlet 222, and the flow hole on the first circulation portion can make the third air outlet 223 is fully exposed.
  • the second shielding portion When the first shielding portion and the second shielding portion are rotated to a certain position, the second shielding portion can completely shield the third air outlet 223, and the two flow holes on the second circulation portion can make the first air outlet 221 and the first air outlet Two The air outlet 222 is in a fully exposed state.
  • the first shielding portion and the second shielding portion are rotated to a certain position, the first shielding portion can completely shield only the first air outlet 221, and the two circulation holes on the second circulation portion can make the second air outlet 222 and The third air outlet 223 is in a fully exposed state.
  • the first shielding portion and the second shielding portion When the first shielding portion and the second shielding portion are rotated to a certain position, the first shielding portion can completely shield the second air outlet 222, and the circulation hole on the first circulation portion can make the first air outlet 221 completely In the exposed state, a flow hole in the second flow portion allows the third air outlet 223 to be in a fully exposed state.
  • the second shielding portion When the first shielding portion and the second shielding portion are rotated to a position, the second shielding portion can completely shield the first air outlet 221, the second air outlet 222, and the third air outlet 223.
  • the first shielding portion and the second shielding portion can also be rotated to other rotational positions to adjust the air passage and the air volume.
  • the number of air outlets is three, which are sequentially spaced apart in the circumferential direction of the peripheral wall portion 22.
  • the three air outlets include a first air outlet 221, a second air outlet 222, and a third air outlet 223, which are sequentially spaced apart in the circumferential direction of the peripheral wall portion 22 and in the counterclockwise direction.
  • the number of occlusions is two.
  • the two shielding portions are a first shielding portion and a second shielding portion, respectively.
  • the first obstruction can be configured to allow it to completely obscure an air outlet.
  • the second obstruction can be configured to allow it to completely obscure the two air outlets.
  • the small spacing between the first shielding portion and the second shielding portion may be configured to allow it to completely expose an air outlet, and the large spacing between the first shielding portion and the second shielding portion may be configured to allow it to completely expose the three air outlets .
  • the first shielding portion, the small interval, the second shielding portion, and the large interval may be sequentially disposed in the circumferential direction of the peripheral wall portion 22 and may be sequentially spaced in the counterclockwise direction.
  • the first air outlet 221, the second air outlet 222, and the third air outlet 223 are all in an open state, that is, a large interval between the two shielding portions is Leave the three air outlets open.
  • the small interval between the two shielding portions may cause the first air outlet 221 to be in a fully exposed state.
  • the first shielding portion can completely shield the first air outlet 221, the second shielding portion can completely shield the third air outlet 223, and the small interval between the two shielding portions can make the second air outlet 222 completely exposed.
  • the second shielding portion can completely shield the first air outlet 221 and the second air outlet 222
  • the large interval between the two shielding portions can make the third air outlet 223 completely exposed.
  • the first shielding portion can completely shield the third air outlet 223, the first air outlet is separated by a large interval between the two shielding portions.
  • the 221 and the second air outlet 222 are in a fully exposed state.
  • the second shielding portion can only completely shield the first air outlet 221, the large interval between the two shielding portions, the second air outlet 222 and the third air outlet 223 are in a completely exposed state.
  • the large interval between the two shielding portions can make the first air outlet 221 completely exposed, and the small interval between the two shielding portions can make the third out
  • the tuyere 223 is in a fully exposed state.
  • the centrifugal fan of the embodiment of the invention can be used in a refrigerator.
  • the refrigerator may have one or more storage compartments, each compartment being also partitioned into a plurality of storage spaces by a shelf/shelf.
  • the refrigerator is also provided with a duct assembly and a centrifugal fan in any of the above embodiments disposed in the duct assembly.
  • the duct assembly can have a cold air inlet and a plurality of sets of cold air outlets. The number of cold air outlets in each group of cold air outlets may be one or more.
  • the cold air inlet may be in communication with a cooling chamber of the refrigerator to receive the cooled airflow through the cooler in the cooling chamber.
  • the air inlet of the centrifugal fan is in communication with the cold air inlet, and each air outlet of the centrifugal fan is respectively connected to each of the cold air outlets of the group of cold air outlets so that the airflow from the cooling chamber is controlled/distributably into the corresponding cold air outlet .
  • Each set of cold air outlets is in communication with a storage compartment when multiple storage compartments of the refrigerator require controlled cooling.
  • each group of cold air outlets is in communication with a storage space when a plurality of storage spaces in a storage room need to be controlled to be cooled.
  • the centrifugal fan can control whether the cold air is flowing from the corresponding air outlet duct to the position according to whether the cold quantity at each position of the refrigerator storage compartment is sufficient, so that the cold air is reasonably distributed to the storage compartment.
  • the centrifugal fan can realize the adjustment of the wind direction and the air volume of the air outlet duct, and the cold air outlet of the refrigerator where the storage room needs cold air is turned on, and the cold air outlet is closed without cold air. Thereby controlling the constant temperature in the refrigerator, providing an optimal storage environment for the food in the refrigerator, reducing the nutrient loss of the food, and reducing the power consumption of the refrigerator and saving energy.

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Abstract

一种离心风机，该离心风机包括：壳体（20），盖部（23）上开设有进风口，周壁部（22）上开设有多个出风口（221,222,223）；风轮组件（30），其具有风轮电机（31）和多个扇叶（32）；送风控制装置（40），可转动地设置于壳体（20）内，且具有一个或多个遮挡部；调节电机（50），设置于周壁部（22）的径向外侧；和传动机构（60），配置成将调节电机（50）输出的旋转运动传递至送风控制装置（40），以使一个或多个遮挡部，转动到不同的转动位置处，对每个出风口（221,222,223）进行完全遮蔽、部分遮蔽或完全暴露，从而调整多个出风口各自的出风面积。该离心风机可通过送风控制装置（40）的转动对多个出风口（221,222,223）进行可控地遮蔽，以实现能够同时向多个方向送风，且能够对每个出风口的出风量进行调节，实现合理送风。

Description

离心风机 技术领域
本发明涉及风机送风技术领域，特别是涉及一种离心风机。
背景技术
现有离心风机只设置有一个出风口，当需要向两个或两个以上不同方向或多个位置送风时，需要设置多个风机或者增设与风机配套的外接头才能够满足向不同方向或多个位置送风的需求。这样就造成了成本的增加，并且有些特殊场合，由于空间的限制无法设置多个风机，则会影响生产或使用，另外，设置外接头不但增加成本也大大的增加送风阻力，使风量减小，送风效率低。
发明内容
本发明的一个目的旨在克服现有的离心风机的至少一个缺陷，提供一种新颖的离心风机，其不仅能够向多个地方或多个方向送风，特别地也能够调整每个出风口的送风量。
本发明的一个进一步的目的是要离心风机的结构布局合理，结构紧凑。
本发明的另一个进一步的目的是要使离心风机送风顺畅，噪音低。
为了实现上述至少一个目的，本发明提供了一种离心风机，其包括：
壳体，其具有底壳部、周壁部和盖部，所述盖部上开设有进风口，所述周壁部上开设有多个出风口；
风轮组件，其具有风轮电机和多个扇叶；所述风轮电机安装于所述底壳部；所述多个扇叶位于所述壳体内，且沿所述风轮电机的周向方向均布设置，以在所述风轮电机的带动下促使气流从所述进风口流入所述壳体并经由所述多个出风口中的一个或多个流出所述壳体；
送风控制装置，可转动地设置于所述壳体内，且具有一个或多个遮挡部；
调节电机，设置于所述周壁部的径向外侧；和
传动机构，配置成将所述调节电机输出的旋转运动传递至所述送风控制装置，以使所述一个或多个遮挡部，转动到不同的转动位置处，对每个所述出风口进行完全遮蔽、部分遮蔽或完全暴露，从而调整所述多个出风口各自 的出风面积。
可选地，每个所述扇叶包括沿所述风轮电机的径向方向依次设置的第一区段和第二区段，所述第一区段和所述第二区段在垂直于所述风轮电机的旋转轴线的平面内的投影均为圆弧形，且所述第一区段和所述第二区段的拱起方向相反。
可选地，所述第一区段和所述第二区段的半径比为0.18至0.3；
所述第一区段的圆心角的取值范围为15°至22°；
所述第二区段的圆心角的取值范围为38°至46°。
可选地，每个所述扇叶沿由所述盖部指向所述底壳部的方向逐渐变厚。
可选地，所述风轮组件还包括罩壳，以及从所述罩壳的开口处向外延伸出的环形底板，所述罩壳的周侧面与所述罩壳的轴线之间的夹角为30°至40°；且所述风轮电机的定子安装于所述底壳部，所述风轮电机的转子安装于所述罩壳内；每个所述扇叶从所述环形底板的朝向所述盖部的表面延伸出。
可选地，所述壳体还包括电机容纳部，设置于所述周壁部的外侧；且
所述调节电机安装于所述电机容纳部。
可选地，所述传动机构包括：
齿轮，安装于所述调节电机的输出轴上；和
与所述齿轮啮合的齿圈，可转动安装于所述周壁部的远离所述底壳部的一端，或可转动地安装于所述底壳部的内侧面；且
所述一个或多个遮挡部从所述齿圈沿平行于所述齿圈的轴线的方向延伸出。
可选地，所述风轮组件的旋转轴线与所述周壁部的轴线平行且间隔设置，以使所述风轮组件偏置于所述壳体内；
所述离心风机还包括聚流板，设置于所述壳体内，所述风轮组件和所述多个出风口位于所述聚流板的同侧，所述聚流板朝远离所述风轮组件的方向拱起，且配置成促使流出所述风轮组件的气流流向所述多个出风口。
可选地，离心风机还包括分流装置，设置于所述壳体内，配置成引导流出所述风轮组件的气流，且使流出所述风轮组件的气流以预定比例流向每个所述出风口。
可选地，所述送风控制装置还包括至少一个流通部，所述遮挡部和所述 流通部沿所述周壁部的周向方向依次设置，且所述一个或多个遮挡部与所述至少一个流通部围成一筒状结构，每个所述流通部上开设有一个或多个流通孔；
所述送风控制装置还配置成在其转动到不同的转动位置处时，使气流经由所述至少一个流通部上的流通孔进入被部分遮蔽或完全暴露的出风口。
本发明的离心风机因为具有多个出风口，可通过送风控制装置的转动对多个出风口进行可控地遮蔽，以实现能够同时向多个方向/多个地方送风，且能够对出风方向/送风地方进行选择以及对每个出风口的出风量进行调节，实现合理送风。
进一步地，由于本发明的离心风机中扇叶、罩壳的特殊结构可使送风更加顺畅，送风量更大，噪音更低。
进一步地，由于本发明的离心风机中风轮组件、带动送风控制装置运转的调节电机、送风控制装置和传动机构等的特殊设计，可使离心风机的结构布局合理、结构紧凑，且美观。
进一步地，由于本发明的离心风机中具有聚流板和导流板，不仅可以提高送风顺畅性，降低送风噪音，且能够对流向各个出风口的风量进行预分配，以较精确地先量化通向各个出风口的风量，然后再利用送风控制装置进行调节。
根据下文结合附图对本发明具体实施例的详细描述，本领域技术人员将会更加明了本发明的上述以及其他目的、优点和特征。
附图说明
后文将参照附图以示例性而非限制性的方式详细描述本发明的一些具体实施例。附图中相同的附图标记标示了相同或类似的部件或部分。本领域技术人员应该理解，这些附图未必是按比例绘制的。附图中：
图1是根据本发明一个实施例的离心风机的示意性结构图；
图2是根据本发明一个实施例的离心风机的示意性分解图；
图3是根据本发明一个实施例的离心风机中局部结构的示意性分解图；
图4是根据本发明一个实施例的离心风机中风轮组件的示意性结构图。
具体实施方式
图1是根据本发明一个实施例的离心风机的示意性结构图；图2和图3 分别是根据本发明一个实施例的离心风机的示意性分解图和局部结构的示意性分解图。如图1至图3所示，本发明实施例提供了一种离心风机。该离心风机可包括壳体20、风轮组件30、送风控制装置40、调节电机50和传动机构60。
壳体20可具有底壳部21、周壁部22和盖部23。具体地，底壳部21可呈板状，周壁部22可呈圆筒状，盖部23可为盖板。周壁部22可与底壳部21一体成型，也就是说，周壁部22是从底壳部21向盖板延伸出。盖部23可通过其边缘处向底壳部21延伸出的卡扣卡接于周壁部22外侧面上的卡孔内。在一些替代性实施例中，周壁部22可与盖部23一体成型，也就是说，周壁部22是从盖板向底壳部21延伸出。进一步地，盖部23上开设有进风口，周壁部22上开设有多个出风口。在图1所示的实施例中，多个出风口可为三个，如第一出风口221、第二出风口222和第三出风口223，在一些其他的实施例中，多个出风口也可为2个、4个、5个等。
风轮组件30可具有风轮电机31和多个扇叶32。风轮电机31安装于底壳部21。多个扇叶32位于壳体20内，且沿风轮电机31的周向方向均布设置，以在风轮电机31的带动下促使气流从进风口流入壳体20并经由多个出风口中的一个或多个流出壳体20。风轮组件30的旋转轴线优选地与进风口同轴设置。
送风控制装置40可转动地设置于壳体20内，且可具有一个或多个遮挡部。例如，遮挡部优选为与周壁同轴设置的遮挡板。当遮挡部为多个时，沿周壁部22的周向方向依次间隔设置。送风控制装置40可转动地设置于壳体20内，以在不同的转动位置处，使一个或多个遮挡部对每个出风口进行完全遮蔽、部分遮蔽或完全暴露，从而调整多个出风口各自的出风面积。也就是说，送风控制装置40可配置成受控地绕周壁部22的轴线转动到不同的转动位置处，以对每个出风口进行完全遮蔽、部分遮蔽或完全暴露，从而调整多个出风口各自的出风面积。
调节电机50可设置于周壁部22的径向外侧。例如，壳体20还包括电机容纳部24，设置于周壁部22的外侧，调节电机50安装于电机容纳部24。传动机构60可配置成将调节电机50输出的旋转运动传递至送风控制装置40，以使一个或多个遮挡部，转动到不同的转动位置处，对每个出风口进行完全遮蔽、部分遮蔽或完全暴露。
本发明实施例中的离心风机由于具有多个出风口，因此能够向多个方向或多个地方输出气流。而且，送风控制装置40能够将从进风口流入的气流可控地分配至多个出风口，可以实现控制与每个出风口连通的出风风道的开闭和/或对每个出风风道内的出风风量进行调节，当应用于冰箱时，可进而来满足不同储物间室的冷量需求，或者一个储物间室的不同的位置处的冷量需求，或者一个储物间室内不同的储物空间的冷量需求。调节电机50和传动机构60特殊的设置位置也可使离心风机的布局更加合理，结构更加紧凑。
在本发明的一些实施例中，如图4所示，每个扇叶32包括沿风轮电机31的径向方向依次设置的第一区段321和第二区段322，第一区段321和第二区段322在垂直于风轮电机31的旋转轴线的平面内的投影均为圆弧形，且第一区段321和第二区段322的拱起方向相反。进一步地，第一区段321和第二区段322的半径比为0.18至0.3。第一区段321的圆心角的取值范围为15°至22°。第二区段322的圆心角的取值范围为38°至46°。进一步地，每个扇叶32可被设计成沿由盖部23指向底壳部21的方向逐渐变厚。
在本发明的一些实施例中，风轮组件30还可包括罩壳33，以及从罩壳33的开口处向外延伸出的环形底板34。罩壳33的周侧面与罩壳33的轴线之间的夹角为30°至40°。例如，罩壳33的周侧面与罩壳33的顶端表面，以及与环形底板34之间均为圆弧形过渡面，周侧面的长度为圆弧形过渡面的半径的3至5倍。为了合理利用空间，风轮电机31的定子311安装于底壳部21，风轮电机31的转子312安装于罩壳33内。每个扇叶32从环形底板34的朝向盖部23的表面延伸出。为了保持风轮组件30工作的稳定性，风轮组件30还可包括加强环35，设置于多个扇叶32的临近盖部23和周壁部22的角部的外侧，且通过多个连接板与多个扇叶32一体成型。连接板的厚度小于扇叶32的厚度。
在本发明的一些实施例中，传动机构60可包括齿轮61以及与齿轮61啮合的齿圈62。齿轮61安装于调节电机50的输出轴上。齿圈62可转动安装于周壁部22的远离底壳部21的一端，或可转动地安装于底壳部21的内侧面。特别地，一个或多个遮挡部从齿圈62沿平行于齿圈62的轴线的方向延伸出。进一步地，齿圈62可包括转盘、位于转盘一侧的环状凸肋、形成在环状凸肋的外侧面上的多个齿牙。一个或多个遮挡部可位于转盘的另一侧。当齿圈62安装于底壳部21的内侧面时，底壳部21的内侧面可形成有 环形凹槽，环状凸肋可转动地安装于环形凹槽内。当齿圈62安装于周壁部22的远离底壳部21的一端时，周壁部22的端部可形成有台阶，以与转盘的具有遮挡部的一侧接触抵靠，盖部23的内表面也可开设有环形凹槽，以容纳环状凸肋。而且，底壳部21还可延伸出夹持壁部，其与周壁部22的内表面之间形成导向夹槽，一个或多个遮挡部可在该导向夹槽内运动。为了便于传动，周壁部22上、底壳部21上或盖部23上开设有允许齿轮61与齿圈62啮合的通孔。
在本发明的一些替代性实施例中，送风控制装置40还包括转座部，转座部呈圆环状或圆弧状，且转座部可转动地安装于壳体20，一个或多个遮挡部从转座部沿转座部的轴线延伸出。优选地，转座部呈圆环状。传动机构60的齿圈62可安装于转座部，且齿圈62和遮挡部位于转座部的两侧。
在本发明的该实施例中，调节电机50设置在周壁部22的径向外侧，即遮挡部的径向外侧。传动机构60配置成将调节电机50输出的旋转运动减速地传递至送风控制装置40。也就是说，在该实施例中，发明人提出了使用传动机构60来弱化调节电机50输出轴的晃动影响，以使送风控制装置40的转位精确。传动机构60的减速增扭功能也可消除调节电机50的卡顿现象。而且，调节电机50设置的特殊位置可使离心风机的整体厚度减薄，节省空间，以特别使用于冰箱。转座部或齿圈62的转盘也可使离心调节电机50中送风控制装置40的运动更加平稳。
在一些实施方式中，带动送风控制装置40转动的调节电机50可为步进电机，尤其是直流步进电机。预定减速比的取值范围可为5至10，例如，减速比为8，可在调节电机50转动到预定位置处停止时，使送风控制装置40继续转动的角度小于或等于一预设值(如0.2°)。当调节电机50转动到预定位置处停机时，调节电机50输出轴上的齿轮61以及调节电机50输出轴可能由于惯性的作用继续转动，带动送风控制装置40继续转动，假设调节电机50输出轴上的齿轮61以及调节电机50输出轴继续转动的角度可小于等于1°，则该运动在具有预定减速比(如预定减速比为8)的传动机构60的作用下，传递到齿圈62以及固定于齿圈62的送风控制装置40后，齿圈62及送风控制装置40继续转动的角度可能就为0.125°，大大提高了送风控制装置40的转动精度。
在本发明的一些实施例中，为了进一步提高送风效率，风轮组件30的 旋转轴线与周壁部22轴线平行且间隔设置，以使风轮组件30偏置于壳体20内。且离心风机还可包括聚流板(图中未示出)。聚流板可设置于壳体20内。风轮组件30和多个出风口位于聚流板的同侧。聚流板朝远离风轮组件30的方向拱起，且配置成促使流出风轮组件30的气流流向多个出风口。优选地，聚流板可为圆弧形板、渐开线型板或蜗壳型板等。为了使离心风机的运动更加平稳，风轮组件30和调节电机50可位于聚流板的两侧。
在本发明的一些实施例中，离心风机还包括分流装置(图中未示出)，设置于壳体20内，配置成引导流出风轮组件30的气流，且使流出风轮组件30的气流以预定比例流向每个出风口。在该实施例中，分流装置和送风控制装置40相配合地对分路送风装置进行控制，以利用分流装置的分流作用和送风控制装置40对多个出风口进行可控地遮蔽的功能，实现对出风进行选择以及每个出风口出风风量的调节，从而可调节每个出风口的工作状态和风量。
具体地，分流装置包括多个导流板，每个导流板配置成使流出风轮组件30的气流从该导流板的两侧流向两个相邻的出风口。每个导流板和聚流板均从盖部23向底壳部21延伸出，可选地，也可从底壳部21延伸出。每个导流板的靠近周壁部22的一端与周壁部22间隔设置，以限定出允许送风控制装置40转动的让位通道。聚流板的两端均与周壁部22间隔设置，以限定出允许送风控制装置40转动的让位通道，以便于送风控制装置40的转动。
在一些实施例中，出风口的数量为三个，三个出风口分别为第一出风口221、第二出风口222和第三出风口223，沿周壁部22的周向方向间隔设置。每个出风口在底壳部21上形成投影的圆心角约为35°至55°。风轮组件30的旋转轴线与多个出风口的两端边缘处(第一出风口221的远离第二出风口222的一侧，第三出风口223的远离第二出风口222的一侧)之间连面的夹角为110°至140°。风轮组件30的旋转轴线与多个出风口的一端边缘处(第一出风口221的远离第二出风口222的一侧)之间的距离，与风轮组件30的旋转轴线与多个出风口的另一端边缘处(第三出风口223的远离第二出风口222的一侧)之间的距离间的比例为5/12至5/8。
聚流板的一端可指向第三出风口223的远离第一出风口221的一侧，另一端靠近风轮组件30的远离多个出风口的一侧。导流板可设置有两个，分别为第一导流板和第二导流板。第一导流板配置成分流第一出风口221和第 二出风口222，第二导流板配置成分流第二出风口222和第三出风口223。且第一导流板的位于第一出风口221侧的面为平面，其与第一出风口221的口边缘所在平面间夹角为65°至80°；第一导流板的位于第二出风口222侧的面在气流入口处为弧形面，导流面为平面；第一导流板的两侧两个平面之间的夹角为5°至20°。第二导流板的位于第二出风口222侧的面为平面，第二导流板的位于第三出风口223侧的面也为平面，第二导流板的两个平面之间的夹角为3°至18°。第一导流板的位于第二出风口222侧的平面与第二导流板的位于第二出风口222侧的平面之间的夹角为15°至35°，以使该通道沿气流流向渐缩。第二导流板的长度可为第一导流板的长度的3.5至4倍。第一导流板、第二导流板、周壁部22以及聚流板可将第一出风口221、第二出风口222和第三出风口223的风量配比限定约为：65％：25％：10％，可精确量化每个出风口出风。
在本发明的一些进一步的实施例中，如图2和图3所示，送风控制装置40还包括至少一个流通部，遮挡部和流通部沿周壁部22的周向方向依次设置，且一个或多个遮挡部与至少一个流通部围成一筒状结构，每个流通部上开设有一个或多个流通孔。送风控制装置40还配置成在其转动到不同的转动位置处时，使气流经由至少一个流通部上的流通孔进入被部分遮蔽或完全暴露的出风口。在这里需要注意的是，流通部与遮挡部之间的界限应当理解为该流通部上流通孔的最外侧的两个沿周壁部22的轴向方向延伸的孔边缘(也可被称为竖向边缘)，或以这两个孔边缘再向两侧扩大约3至10mm后的区域。例如，当流通部上的流通孔只有一个时，该孔的两个竖向边缘可为流通部与遮挡部之间的边界。当流通部上的流通孔为多个时，多个优选沿周壁部22的周向方向排列，则多个流通孔理解为一个整体，最外侧的两个孔的两个外侧的竖向边缘为流通部与遮挡部之间的边界。
在本发明一些实施例中，每个遮挡部和流通部优先设置在转盘的表面边缘处。在齿圈62绕周壁部22的轴线转动时，每个遮挡部的外侧表面可始终密封贴附在周壁部22的内侧表面，这样遮挡板在不同的转动位置处能够受控地打开或关闭一个或多个出风口。在本发明的一些替代性实施例中，为了便于送风控制装置40的转动，可通过使每个遮挡部与周壁部22之间的距离稍稍变大来解决，然而在遮挡部与周壁部22之间的距离增大的情况下，不能起到完全有效的遮蔽，气流可通过遮挡部与周壁部22之间的缝隙从一个 出风口流向另一个出风口。因此，可在每个遮挡部外侧面的沿其转动方向的两端均设置一个密封垫(图中未示出)。在每个流通部上的每两个相邻的流通孔之间也可设置密封垫。
在本发明的一些实施例中，送风控制装置40的一个或多个遮挡部转动时，可同时能够对多个出风口的开闭以及遮蔽面积进行调整。
在本发明的一些优选的实施例中，送风控制装置40的一个或多个遮挡部转动时，可使部分出风口处于关闭状态，且使部分出风口处于打开状态，以更好地选择送风风路和送风方向。例如，出风口的数量可为三个，包括第一出风口221、第二出风口222和第三出风口223。第一出风口221、第二出风口222和第三出风口223可沿周壁部22的周向方向且可沿逆时针方向(从盖部23向底壳部21看呈逆时针方向)依次间隔设置。两个出风口之间的间距的圆心角优选可为5°至20°。遮挡部和流通部的数量均为两个。两个遮挡部包括第一遮挡部和第二遮挡部。两个流通部包括第一流通部和第二流通部，沿周壁部22的周向方向且可沿顺时针方向依次间隔设置。特别地，第一遮挡部配置成允许其完全遮蔽一个出风口。第二遮挡部配置成允许其至少完全遮蔽两个出风口，如第二遮挡部可至少完全遮蔽三个出风口。第一流通部上开设有一个流通孔，第二流通部上开设有沿周壁部22的周向方向依次间隔设置的三个流通孔，每个流通孔配置成允许其完全暴露一个出风口，且第二流通部上的三个流通孔配置成允许其完全暴露三个出风口。
离心风机工作时，当第一遮挡部和第二遮挡部转动到某一位置处时，第二流通部上的三个流通孔可使第一出风口221、第二出风口222和第三出风口223均处于打开状态。当第一遮挡部和第二遮挡部转动到某一位置处时，第二遮挡部可完全遮蔽第二出风口222和第三出风口223，第二流通部上的流通孔可使第一出风口221处于完全暴露状态。当第一遮挡部和第二遮挡部转动到某一位置处时，第一遮挡部可完全遮蔽第三出风口223，第二遮挡部可完全遮蔽第一出风口221，第一流通部上的流通孔可使第二出风口222处于完全暴露状态。当第一遮挡部和第二遮挡部转动到某一位置处时，第二遮挡部完全遮蔽第一出风口221和第二出风口222，第一流通部上的流通孔可使第三出风口223处于完全暴露状态。
当第一遮挡部和第二遮挡部转动到某一位置处时，第二遮挡部可完全遮蔽第三出风口223，第二流通部上的两个流通孔可使第一出风口221和第二 出风口222处于完全暴露状态。当第一遮挡部和第二遮挡部转动到某一位置处时，第一遮挡部可仅完全遮蔽第一出风口221，第二流通部上的两个流通孔可使第二出风口222和第三出风口223处于完全暴露状态。当第一遮挡部和第二遮挡部转动到某一位置处时，第一遮挡部可完全遮蔽第二出风口222，第一流通部上的流通孔可使可使第一出风口221处于完全暴露状态，第二流通部上的一个流通孔可使第三出风口223处于完全暴露状态。当第一遮挡部和第二遮挡部转动到如某一位置处时，第二遮挡部可完全遮蔽第一出风口221、第二出风口222和第三出风口223。当然，第一遮挡部和第二遮挡部也可转动到其他的转动位置处，以对风路和风量进行调节。
在本发明的另一些实施例中，送风控制装置40中没有流通部，当只有一个遮挡部的情况下，遮挡部的两侧均允许气流通过。当送风控制装置40有多个遮挡部的情况下，每两个相邻的遮挡部之间的间隔均可允许气流通过。
具体地，在一些优选地实施方式中，出风口的数量为三个，沿周壁部22的周向方向依次间隔设置。这三个出风口包括第一出风口221、第二出风口222和第三出风口223，沿周壁部22的周向方向且可沿逆时针方向依次间隔设置。遮挡部的数量为两个。两个遮挡部分别为第一遮挡部和第二遮挡部。第一遮挡部可配置成允许其完全遮蔽一个出风口。第二遮挡部可配置成允许其完全遮蔽两个出风口。第一遮挡部和第二遮挡部之间的小间隔可配置成允许其完全暴露一个出风口，第一遮挡部和第二遮挡部之间的大间隔可配置成允许其完全暴露三个出风口。第一遮挡部、小间隔、第二遮挡部、大间隔可沿周壁部22的周向方向且可沿逆时针方向依次间隔设置。
当第一遮挡部和第二遮挡部均不遮蔽出风口时，第一出风口221、第二出风口222和第三出风口223均处于打开状态，即两个遮挡部之间的大间隔可使三个出风口处于打开状态。当第二遮挡部完全遮蔽第二出风口222和第三出风口223时，两个遮挡部之间的小间隔可使第一出风口221处于完全暴露状态。当第一遮挡部可完全遮蔽第一出风口221时，第二遮挡部可完全遮蔽第三出风口223，两个遮挡部之间的小间隔可使第二出风口222处于完全暴露状态。当第二遮挡部可完全遮蔽第一出风口221和第二出风口222时，两个遮挡部之间的大间隔可使第三出风口223处于完全暴露状态。当第一遮挡部可完全遮蔽第三出风口223时，两个遮挡部之间的大间隔第一出风口 221和第二出风口222处于完全暴露状态。当第二遮挡部仅可完全遮蔽第一出风口221时，两个遮挡部之间的大间隔第二出风口222和第三出风口223处于完全暴露状态。当第一遮挡部可完全遮蔽第二出风口222时，两个遮挡部之间的大间隔可使第一出风口221处于完全暴露状态，两个遮挡部之间的小间隔可使第三出风口223处于完全暴露状态。
本发明实施例的离心风机可用于冰箱。例如，冰箱可具有一个或多个储物间室，每个储物间室也可被搁物板/搁物架分隔成多个储物空间。进一步地，该冰箱中也设置有风道组件和设置于风道组件内的、上述任一实施例中的离心风机。风道组件可具有冷风入口和多组冷风出口。每组冷风出口中冷风出口的数量可为一个或多个。冷风入口可与冰箱的冷却室连通，以接收经冷却室内的冷却器冷却后的气流。离心风机的进风口与冷风入口连通，离心风机的每个出风口分别连通一组冷风出口中的每个冷风出口，以使来自冷却室的气流受控地/可分配地进入相应的冷风出口处。当冰箱的多个储物间室需要受控地进行冷却时，每组冷风出口与一个储物间室连通。
此外，当一个储物间室内多个储物空间需要受控地进行冷却时，每组冷风出口与一个储物空间连通。该离心风机可使冰箱根据冰箱储物间室各个位置处的冷量是否充足，控制使冷风从相应的出风风道流入该位置处，以可使冷风被合理分配至储物间室不同的位置处，增强了冰箱的保鲜性能和运行效率。该离心风机能够实现对出风风道风向、风量的调节，冰箱的该储物间室内哪里需要冷风就开启那里的冷风出口，不需要冷风就关闭。从而控制冰箱内温度的恒定性，为冰箱内的食物提供最佳的储存环境，减少食物的营养流失，并且能够减小冰箱的耗电，节约能源。
至此，本领域技术人员应认识到，虽然本文已详尽示出和描述了本发明的多个示例性实施例，但是，在不脱离本发明精神和范围的情况下，仍可根据本发明公开的内容直接确定或推导出符合本发明原理的许多其他变型或修改。因此，本发明的范围应被理解和认定为覆盖了所有这些其他变型或修改。

Claims (10)

  1. 一种离心风机，其特征在于，包括：
    壳体，其具有底壳部、周壁部和盖部，所述盖部上开设有进风口，所述周壁部上开设有多个出风口；
    风轮组件，其具有风轮电机和多个扇叶；所述风轮电机安装于所述底壳部；所述多个扇叶位于所述壳体内，且沿所述风轮电机的周向方向均布设置，以在所述风轮电机的带动下促使气流从所述进风口流入所述壳体并经由所述多个出风口中的一个或多个流出所述壳体；
    送风控制装置，可转动地设置于所述壳体内，且具有一个或多个遮挡部；
    调节电机，设置于所述周壁部的径向外侧；和
    传动机构，配置成将所述调节电机输出的旋转运动传递至所述送风控制装置，以使所述一个或多个遮挡部，转动到不同的转动位置处，对每个所述出风口进行完全遮蔽、部分遮蔽或完全暴露，从而调整所述多个出风口各自的出风面积。
  2. 根据权利要求1所述的离心风机，其特征在于，
    每个所述扇叶包括沿所述风轮电机的径向方向依次设置的第一区段和第二区段，所述第一区段和所述第二区段在垂直于所述风轮电机的旋转轴线的平面内的投影均为圆弧形，且所述第一区段和所述第二区段的拱起方向相反。
  3. 根据权利要求2所述的离心风机，其特征在于，
    所述第一区段和所述第二区段的半径比为0.18至0.3；
    所述第一区段的圆心角的取值范围为15°至22°；
    所述第二区段的圆心角的取值范围为38°至46°。
  4. 根据权利要求1所述的离心风机，其特征在于，
    每个所述扇叶沿由所述盖部指向所述底壳部的方向逐渐变厚。
  5. 根据权利要求1所述的离心风机，其特征在于，
    所述风轮组件还包括罩壳，以及从所述罩壳的开口处向外延伸出的环形 底板，所述罩壳的周侧面与所述罩壳的轴线之间的夹角为30°至40°；且
    所述风轮电机的定子安装于所述底壳部，所述风轮电机的转子安装于所述罩壳内；
    每个所述扇叶从所述环形底板的朝向所述盖部的表面延伸出。
  6. 根据权利要求1所述的离心风机，其特征在于，
    所述壳体还包括电机容纳部，设置于所述周壁部的外侧；且
    所述调节电机安装于所述电机容纳部。
  7. 根据权利要求1所述的离心风机，其特征在于，所述传动机构包括：
    齿轮，安装于所述调节电机的输出轴上；和
    与所述齿轮啮合的齿圈，可转动安装于所述周壁部的远离所述底壳部的一端，或可转动地安装于所述底壳部的内侧面；且
    所述一个或多个遮挡部从所述齿圈沿平行于所述齿圈的轴线的方向延伸出。
  8. 根据权利要求1所述的离心风机，其特征在于，
    所述风轮组件的旋转轴线与所述周壁部的轴线平行且间隔设置，以使所述风轮组件偏置于所述壳体内；
    所述离心风机还包括聚流板，设置于所述壳体内，所述风轮组件和所述多个出风口位于所述聚流板的同侧，所述聚流板朝远离所述风轮组件的方向拱起，且配置成促使流出所述风轮组件的气流流向所述多个出风口。
  9. 根据权利要求8所述的离心风机，其特征在于，还包括：
    分流装置，设置于所述壳体内，配置成引导流出所述风轮组件的气流，且使流出所述风轮组件的气流以预定比例流向每个所述出风口。
  10. 根据权利要求1所述的离心风机，其特征在于，
    所述送风控制装置还包括至少一个流通部，所述遮挡部和所述流通部沿所述周壁部的周向方向依次设置，且所述一个或多个遮挡部与所述至少一个流通部围成一筒状结构，每个所述流通部上开设有一个或多个流通孔；
    所述送风控制装置还配置成在其转动到不同的转动位置处时，使气流经 由所述至少一个流通部上的流通孔进入被部分遮蔽或完全暴露的出风口。
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