WO2020233471A1 - 离心风机和干衣机 - Google Patents

离心风机和干衣机 Download PDF

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Publication number
WO2020233471A1
WO2020233471A1 PCT/CN2020/090029 CN2020090029W WO2020233471A1 WO 2020233471 A1 WO2020233471 A1 WO 2020233471A1 CN 2020090029 W CN2020090029 W CN 2020090029W WO 2020233471 A1 WO2020233471 A1 WO 2020233471A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
impeller
centrifugal fan
air inlet
volute tongue
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/CN2020/090029
Other languages
English (en)
French (fr)
Inventor
吕佩师
李涛
邴进东
成荣锋
杨龙
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.)
Qingdao Haier Drum Washing Machine Co Ltd
Haier Smart Home Co Ltd
Original Assignee
Qingdao Haier Drum Washing Machine Co Ltd
Haier Smart Home 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 Qingdao Haier Drum Washing Machine Co Ltd, Haier Smart Home Co Ltd filed Critical Qingdao Haier Drum Washing Machine Co Ltd
Priority to US17/613,635 priority Critical patent/US11808280B2/en
Priority to EP20809669.3A priority patent/EP3974653A4/en
Publication of WO2020233471A1 publication Critical patent/WO2020233471A1/zh
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
    • 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
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • 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
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • 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
    • F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
    • F04D25/166—Combinations of two or more pumps ; Producing two or more separate gas flows using fans
    • 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
    • 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
    • F04D29/26—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
    • F04D29/422—Discharge tongues
    • 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
    • F04D29/424—Double entry casings
    • 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
    • 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
    • F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
    • F04D29/48—Fluid-guiding means, e.g. diffusers adjustable for unidirectional fluid flow in reversible pumps
    • F04D29/483—Fluid-guiding means, e.g. diffusers adjustable for unidirectional fluid flow in reversible pumps especially adapted for elastic fluid pumps

Definitions

  • the invention belongs to the technical field of fans, and specifically provides a centrifugal fan and a clothes dryer.
  • the centrifugal fan is based on the principle of converting kinetic energy into potential energy, using a high-speed rotating impeller to accelerate the gas, then decelerate, change the flow direction, and convert kinetic energy into potential energy.
  • the centrifugal fan includes a motor, a casing, and an impeller arranged in the casing.
  • the motor can drive the impeller to rotate at a high speed to accelerate the gas.
  • a volute tongue is provided at the air outlet of the casing. The worm tongue can cut the airflow drawn by the impeller to make the airflow Exhaust from the air outlet.
  • the centrifugal fan needs to be able to achieve forward and reverse rotation.
  • clothes dryers Take clothes dryers as an example.
  • existing clothes dryers usually use a motor to simultaneously drive the drying drum and the impeller of the centrifugal fan to rotate.
  • the problem of entanglement in the drying drum During the working process of the dryer, the drying drum needs to be reversed.
  • the impeller rotates in the forward direction of the drying drum (the design direction of the centrifugal fan)
  • the worm tongue can cut the impeller driven
  • the airflow causes the airflow to be discharged from the air outlet.
  • the present invention provides a centrifugal fan.
  • the centrifugal fan includes a casing and an impeller and a volute tongue arranged in the casing.
  • the casing is provided with an air inlet and an air outlet
  • the volute tongue includes stacked and The first volute tongue and the second volute tongue are arranged offset from each other, the impeller is arranged to be able to suck air into the housing through the air inlet when rotating, and the first volute tongue is arranged to be in the forward direction of the impeller.
  • the air blown from the impeller can be cut and the air is directed to the air outlet, and the second volute tongue is configured to cut the air blown from the impeller when the impeller rotates in the reverse direction.
  • the air is guided to the air outlet.
  • the impeller is a double-layer impeller
  • the double-layer impeller includes a first-layer impeller part corresponding to the first volute tongue and a first-layer impeller part corresponding to the second volute tongue.
  • the second layer impeller part, the axis of the first layer impeller part coincides with the axis of the second layer impeller part.
  • the first-layer impeller portion includes a plurality of first blades arranged in an annular shape, and the plurality of first blades are collectively arranged to be configured to rotate when the first-layer impeller portion rotates in the forward direction.
  • the air entering the housing from the air inlet can be guided to the first volute tongue
  • the second-layer impeller portion includes a plurality of second blades arranged in an annular shape, and the plurality of second blades are collectively arranged as When the second-layer impeller part rotates in the reverse direction, the air entering the housing from the air inlet can be guided to the second volute tongue.
  • the first blade and the second blade are both arc-shaped blades, and the inclination direction of the first blade and the inclination direction of the second blade are different.
  • the first blade and the second blade are both straight blades, and the inclination direction of the first blade and the inclination direction of the second blade are the same or different.
  • the impeller is a single-layer impeller
  • the single-layer impeller includes an impeller part corresponding to the first volute tongue and the second volute tongue
  • the impeller part includes an annular
  • a plurality of blades are provided, and the plurality of blades are collectively set to be able to guide the air entering the housing from the air inlet to the first volute tongue and the first volute tongue when the impeller portion rotates in the forward or reverse direction.
  • the second volute tongue is a single-layer impeller
  • the single-layer impeller includes an impeller part corresponding to the first volute tongue and the second volute tongue
  • the impeller part includes an annular
  • a plurality of blades are provided, and the plurality of blades are collectively set to be able to guide the air entering the housing from the air inlet to the first volute tongue and the first volute tongue when the impeller portion rotates in the forward or reverse direction.
  • the second volute tongue is a single-layer impeller, the single-layer impeller includes an impeller
  • the plurality of blades are all straight blades and are arranged along the radial direction of the single-layer impeller.
  • the number of the air inlet is one, and the air inlet is arranged on one side of the casing.
  • an air guiding structure is provided in the impeller, and the air guiding structure is configured to be able to guide the air entering the casing.
  • the air guiding structure is an air guiding frustum, and the cone end of the air guiding frustum is arranged close to the air inlet.
  • the number of the air inlet is two, the air inlet includes a first air inlet and a second air inlet, and the first air inlet and the second air inlet are respectively provided On both sides of the housing.
  • an air guiding structure is provided in the impeller, and the air guiding structure is configured to be able to guide the air entering the casing.
  • the air guiding structure includes a first air guiding cone and a second air guiding cone that are connected, and the cone end of the first air guiding cone is close to the first air inlet
  • the cone end of the second air guide frustum is arranged close to the second air inlet.
  • the present invention also provides a clothes dryer, which includes the above-mentioned centrifugal fan.
  • two volute tongue structures are provided in the casing of the centrifugal fan: a first volute tongue and a second volute tongue, and the first volute tongue and the second volute tongue
  • the two volute tongues are arranged in stacks and dislocations.
  • the first volute tongue is arranged on the left side plate of the housing and close to the top plate of the housing
  • the second volute tongue is arranged on the right side plate of the housing and close to the top plate of the housing.
  • the bottom plate is set.
  • the second worm tongue can move the lower half of the impeller The blown air cuts and guides the air to the air outlet.
  • the centrifugal fan can blow out a large amount of air when the impeller rotates in the forward and reverse directions.
  • the impeller is a double-layer impeller
  • the double-layer impeller includes a first-layer impeller part and a second-layer impeller part
  • the first-layer impeller part corresponds to the first volute tongue
  • the second-layer impeller part corresponds to the second worm tongue .
  • the impeller part of the first layer rotates in the forward direction
  • the first blade can guide the air entering the housing from the air inlet to the first volute tongue, thereby increasing the air output of the centrifugal fan.
  • the impeller part of the second layer is reversed.
  • the second blade can guide the air entering the casing from the air inlet to the second volute tongue, which can increase the air output of the centrifugal fan. That is, when the impeller rotates in the forward and reverse directions, the air output of the centrifugal fan can be increased. .
  • the impeller is a single-layer impeller, and the single-layer impeller includes an impeller part corresponding to the first volute tongue and the second volute tongue, and the impeller part includes a plurality of annularly arranged blades.
  • the plurality of blades are all straight blades and arranged along the radial direction of the single-layer impeller. Through this arrangement, the centrifugal fan can blow out the same amount of wind when the impeller rotates forward and backward.
  • an air guiding structure is provided in the impeller.
  • the wind guide structure guides the air entering the shell, which is beneficial to the flow of air.
  • the air inlet includes a first air inlet and a second air inlet, and the first air inlet and the second air inlet are respectively arranged on both sides of the housing.
  • the air guiding structure includes a first air guiding cone and a second air guiding cone that are connected, and the cone end of the first air guiding cone is arranged close to the first air inlet, The cone end of the second air guide cone is arranged close to the second air inlet.
  • the first air guide cone guides the air entering from the first air inlet, and the second air guide cone guides the air entering from the second air inlet, which can avoid air collision and turbulence in the impeller.
  • the first air guide frustum guides the air that enters from the first air inlet to the first impeller part
  • the second air guide frustum guides the air that enters from the second air inlet.
  • the first air guide cone guides the air entering from the first air inlet to the upper half of the impeller part
  • the second The air guide frustum guides the air entering from the second air inlet to the lower half of the impeller part, so as to avoid collision of air in the impeller.
  • the clothes dryer provided by the present invention on the basis of the above technical solution adopts the above-mentioned centrifugal fan and thus has the technical effects of the above-mentioned centrifugal fan.
  • the dryer of the present invention The clothes machine can provide sufficient air volume when the drying drum rotates forward and backward, thereby improving the drying effect of clothes.
  • Fig. 1 is a structural schematic diagram of the first embodiment of the centrifugal fan of the present invention
  • FIG. 2 is a schematic diagram of the second embodiment of the centrifugal fan of the present invention.
  • Fig. 3 is a structural diagram 1 of the impeller of the first embodiment of the centrifugal fan of the present invention.
  • FIG. 4 is a schematic diagram of the third embodiment of the centrifugal fan of the present invention.
  • Fig. 5 is a second structural diagram of the impeller of the first embodiment of the centrifugal fan of the present invention.
  • FIG. 6 is a schematic structural diagram of the housing of the second embodiment of the centrifugal fan of the present invention.
  • Fig. 7 is a structural schematic diagram of the second embodiment of the centrifugal fan of the present invention.
  • Fig. 8 is a second structural diagram of the second embodiment of the centrifugal fan of the present invention.
  • FIG. 9 is a schematic diagram of the third embodiment of the centrifugal fan of the present invention.
  • FIG. 10 is a schematic structural view of the impeller of the second embodiment of the centrifugal fan of the present invention.
  • Figure 11 is a cross-sectional view of Figure 10
  • Fig. 12 is a structural diagram 1 of Embodiment 3 of the centrifugal fan of the present invention.
  • FIG. 13 is a schematic diagram of the second embodiment of the centrifugal fan of the present invention.
  • FIG. 14 is a structural schematic diagram 1 of the impeller of the third embodiment of the centrifugal fan of the present invention.
  • Fig. 15 is a second structural diagram of the impeller of the third embodiment of the centrifugal fan of the present invention.
  • Fig. 16 is a structural schematic diagram 1 of the fourth embodiment of the centrifugal fan of the present invention.
  • Figure 17 is a schematic diagram of the second embodiment of the centrifugal fan of the present invention.
  • Fig. 19 is a cross-sectional view of Fig. 18.
  • connection can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be a connection between two components.
  • connection can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be a connection between two components.
  • the volute tongue of the existing centrifugal fan cannot cut the air flow drawn by the impeller when the rotation direction of the impeller is opposite to the design direction, which leads to the problem that the air output of the centrifugal fan is sharply reduced.
  • the invention provides a centrifugal fan and a clothes dryer, aiming to enable the volute tongue of the centrifugal fan to cut the air flow induced by the impeller when the impeller rotates in the forward and reverse directions, and to ensure the demand for air volume.
  • the centrifugal fan of the present invention includes a casing and an impeller and a volute tongue arranged in the casing.
  • the casing is provided with an air inlet and an air outlet.
  • the volute tongue includes a first volute tongue and a second volute tongue that are stacked and displaced from each other.
  • the volute tongue, the impeller is set to suck air into the housing from the air inlet when it is rotating, the first volute tongue is set to cut the air blown from the impeller when the impeller rotates forward, and guide the air to the air outlet.
  • the tongue is set to cut the air blown from the impeller and guide the air to the air outlet when the impeller rotates in the reverse direction.
  • two volute tongue structures are arranged in the casing of the centrifugal fan: a first volute tongue and a second volute tongue, and the first volute tongue and the second volute tongue are arranged in a stacked and staggered manner, for example, the first volute tongue is arranged It is arranged on the left side plate of the housing and close to the top plate of the housing, and the second volute tongue is arranged on the right side plate of the housing and close to the bottom plate of the housing.
  • the impeller rotates forward, the first worm tongue can The air blown from the upper half of the impeller cuts and guides the air to the air outlet.
  • the second volute tongue can cut the air blown from the lower half of the impeller and guide the air to the air outlet.
  • the setting enables the centrifugal fan to blow out a large amount of air when the impeller rotates in the forward and reverse directions.
  • Fig. 1 is a schematic structural diagram of the first embodiment of the centrifugal fan of the present invention
  • Fig. 2 is the first embodiment of the centrifugal fan of the present invention
  • Fig. 3 is a schematic structural diagram of the impeller of the first embodiment of the centrifugal fan of the present invention
  • Fig. 4 is a schematic structural diagram of the third embodiment of the centrifugal fan of the present invention
  • Fig. 5 is a schematic diagram of the centrifugal fan of the present invention
  • the structure diagram of the impeller of the first embodiment is the second.
  • the centrifugal fan of this embodiment includes a housing 1 and an impeller 2 and a volute tongue 3 arranged in the housing 1.
  • the housing 1 is provided with an air inlet 4 and an air outlet 5, and the worm tongue 3 includes a first volute tongue 31 and a second volute tongue 32 that are stacked and offset from each other.
  • the impeller 2 is a double-layer impeller.
  • the double-layer impeller includes a first-layer impeller part 21 and a second volute part 21 corresponding to the first worm tongue 31.
  • the two volute tongues 32 correspond to the second-layer impeller portion 22, and the axis of the first-layer impeller portion 21 coincides with the axis of the second-layer impeller portion 22.
  • the number of the air inlet 4 is one and it is arranged on the top plate 11 of the housing 1.
  • the air inlet 4 can also be arranged on the bottom plate 12 of the housing 1, and the first volute tongue 31 is arranged on the left side of the housing 1.
  • the upper part of the side plate 13 is located close to the top plate 11, and the second volute tongue 32 is located at the lower part of the right side plate 14 of the housing 1, which is located close to the bottom plate 12.
  • the impeller 2 rotates in the forward direction (clockwise rotation as seen from the figure). ), the first volute tongue 31 can cut the air blown from the first layer of the impeller part 21 and guide the air to the air outlet 5.
  • the second The worm tongue 32 can cut the air blown from the second-layer impeller part 22 and guide the air to the air outlet 5.
  • the first-layer impeller part 21 includes a plurality of first blades 211 arranged in a ring shape, and the plurality of first blades 211 are collectively arranged to be configured when the first-layer impeller part 21 rotates forward.
  • the air entering the housing 1 from the air inlet 4 can be guided to the first volute tongue 31.
  • the second-layer impeller portion 22 includes a plurality of second blades 221 arranged in a ring shape, and the plurality of second blades 221 are collectively arranged on the second layer.
  • the impeller part 22 rotates in the reverse direction, the air entering the housing 1 from the air inlet 4 can be guided to the second volute tongue 32.
  • the first blade 211 and the second blade 221 are both arc-shaped blades, and the first-layer impeller portion 21 rotates in the forward direction (clockwise rotation as seen from the figure). ), because the first blade 211 is inclined clockwise, the first blade 211 can guide the air entering the housing 1 from the air inlet 4 to the first volute tongue 31. Similarly, the second layer of impeller part 22 rotates in the reverse direction (from When the figure shows counterclockwise rotation), since the second blade 221 is inclined counterclockwise, the second blade 221 can guide the air entering the housing 1 from the air inlet 4 to the second volute tongue 32, the tilt direction of the first blade 211 It is different from the inclination direction of the second blade 221. In another preferred situation, as shown in FIGS.
  • the first blade 211 and the second blade 221 are both straight blades, and the first-layer impeller portion 21 rotates in the forward direction (clockwise rotation as seen from the figure). ), since the first blade 211 is inclined clockwise, the first blade 211 can guide the air entering the housing 1 from the air inlet 4 to the first volute tongue 31. Similarly, the second layer of impeller part 22 rotates in the reverse direction (from When the figure shows counterclockwise rotation), since the second blade 221 is inclined counterclockwise, the second blade 221 can guide the air entering the housing 1 from the air inlet 4 to the second volute tongue 32, the tilt direction of the first blade 211 It is different from the inclination direction of the second blade 221.
  • first blade 211 and the second blade 221 are both straight blades, and both the first blade 211 and the second blade 221 are arranged along the radial direction of the impeller 2.
  • the inclination directions of the first blade 211 and the second blade 221 are the same.
  • the first blade 211 and the second blade 221 can also be set in other shapes.
  • both the first blade 211 and the second blade 221 can be set to " V"-shaped blades or "L"-shaped blades, etc., such flexible adjustments and changes do not deviate from the principle and scope of the present invention, and should be limited within the protection scope of the present invention.
  • an air guiding structure 6 is provided in the impeller 2, and the air guiding structure 6 is arranged to be able to guide the air entering the housing 1.
  • the air guiding structure 6 is an air guiding frustum 6, and the cone end 61 of the air guiding frustum 6 is arranged close to the air inlet 4, and the air enters from the air inlet 4 and flows to the first layer of the impeller under the guidance of the air guiding cone 6 21 and the second layer impeller part 22.
  • the wind guide structure 6 can also be set as other wind guide structures 6 such as triangular pyramids. This adjustment and change of the specific structure of the wind guide structure 6 does not deviate from the principle and scope of the present invention, and should be limited to this Within the scope of protection of the invention.
  • FIG. 6 is a structural diagram of the housing of the second embodiment of the centrifugal fan of the present invention
  • Fig. 7 is the implementation of the centrifugal fan of the present invention
  • Fig. 8 is a schematic structural diagram of the second embodiment of the centrifugal fan of the present invention.
  • Fig. 9 is a schematic structural diagram of the second embodiment of the centrifugal fan of the present invention.
  • Fig. 10 is a schematic view of the centrifugal fan of the present invention.
  • the structure diagram of the impeller of the second embodiment, FIG. 11 is a cross-sectional view of FIG. 10.
  • the centrifugal fan of this embodiment includes a housing 1 and an impeller 2 and a volute tongue 3 arranged in the housing 1.
  • the housing 1 is provided with an air inlet 4 and an air outlet 5, and the worm tongue 3 includes a first volute tongue 31 and a second volute tongue 32 that are stacked and offset from each other.
  • the impeller 2 is a double-layer impeller.
  • the double-layer impeller includes a first-layer impeller part 21 and a second volute part 21 corresponding to the first worm tongue 31.
  • the two volute tongues 32 correspond to the second-layer impeller portion 22, and the axis of the first-layer impeller portion 21 coincides with the axis of the second-layer impeller portion 22.
  • the number of the air inlet 4 is two, and the air inlet 4 includes a first air inlet 41 and a second air inlet 42.
  • the first air inlet 41 and the second air inlet 42 are respectively provided on both sides of the housing 1, which can be
  • the first air inlet 41 is provided on the top plate 11 of the housing 1
  • the second air inlet 42 is provided on the bottom plate 12 of the housing 1
  • the first volute tongue 31 is provided on the upper part of the left side plate 13 of the housing 1, namely close to
  • the top plate 11 is provided
  • the second volute tongue 32 is provided at the lower part of the right side plate 14 of the housing 1, that is, it is set close to the bottom plate 12.
  • the first volute tongue 31 It can cut the air blown from the impeller part 21 of the first layer and guide the air to the air outlet 5.
  • the second volute tongue 32 can cut the second layer The air blown from the impeller part 22 cuts and guides the air to the air outlet 5.
  • the output shaft of a drive motor (not shown in the figure) for driving the impeller 2 to rotate may extend from the first air inlet 41 or the second air inlet 42 If the output shaft of the drive motor extends from the first air inlet 41, it is necessary to make a gap between the drive motor and the first air inlet 41 to avoid affecting the air entering the shell from the first air inlet 41. Body 1, in the same way, if the output shaft of the drive motor extends from the second air inlet 42, there is a gap between the drive motor and the second air inlet 42 to avoid affecting the air from entering the housing from the second air inlet 42 1.
  • the first-layer impeller part 21 includes a plurality of first blades 211 arranged in a ring shape, and the plurality of first blades 211 share a common shape.
  • the second-layer impeller portion 22 includes a plurality of second blades 221 arranged in a ring shape. The plurality of second blades 221 are collectively arranged to be able to guide the air entering the housing 1 from the air inlet 4 to the second volute tongue 32 when the second-layer impeller portion 22 rotates in the reverse direction.
  • the first blade 211 and the second blade 221 are both arc-shaped blades, and when the first-layer impeller portion 21 rotates in the forward direction (clockwise rotation as seen from the figure), Since the first blade 211 is inclined clockwise, the first blade 211 can guide the air entering the housing 1 from the air inlet 4 to the first volute tongue 31.
  • the second-layer impeller part 22 rotates in the opposite direction (as seen from the figure)
  • the second blade 221 can guide the air entering the housing 1 from the air inlet 4 to the second volute tongue 32, the inclination direction of the first blade 211 and the second The inclination directions of the blades 221 are different.
  • the first blade 211 and the second blade 221 are both straight blades, and the first-layer impeller part 21 rotates in the forward direction (clockwise rotation as seen from the figure), Since the first blade 211 is inclined clockwise, the first blade 211 can guide the air entering the housing 1 from the air inlet 4 to the first volute tongue 31.
  • the second-layer impeller part 22 rotates in the opposite direction (as seen from the figure)
  • the second blade 221 can guide the air entering the housing 1 from the air inlet 4 to the second volute tongue 32, the inclination direction of the first blade 211 and the second The inclination directions of the blades 221 are different.
  • the first blade 211 and the second blade 221 are both straight blades, and the first blade 211 and the second blade 221 are both arranged along the radial direction of the impeller 2.
  • the inclination directions of the first blade 211 and the second blade 221 are the same.
  • first blade 211 and the second blade 221 can also be set in other shapes.
  • both the first blade 211 and the second blade 221 can be set to " V"-shaped blades or "L"-shaped blades, etc., such flexible adjustments and changes do not deviate from the principle and scope of the present invention, and should be limited within the protection scope of the present invention.
  • an air guiding structure 6 is provided in the impeller 2, and the air guiding structure 6 is configured to be able to guide the air entering the housing 1.
  • the air guiding structure 6 includes a first air guiding frustum 6A and a second air guiding frustum 6B that are connected, the conical end 6A1 of the first air guiding frustum 6A is arranged close to the first air inlet 41, and the second air guiding frustum The tapered end 6B1 of 6B is set close to the second air inlet 42. The air enters from the first air inlet 41 and flows to the first layer of impeller 21 under the guidance of the first air guide cone 6A.
  • the air enters from the second air inlet 42. It flows to the second stage impeller part 22 under the guidance of the second air guide frustum 6B.
  • the wind guide structure 6 can also be set as two connected triangular pyramids and other wind guide structures. This adjustment and change of the specific structure of the wind guide structure 6 does not deviate from the principle and scope of the present invention, and should It is limited within the protection scope of the present invention.
  • Fig. 12 is a structural schematic diagram of the third embodiment of the centrifugal fan of the present invention
  • Fig. 13 is the third embodiment of the centrifugal fan of the present invention
  • Fig. 14 is the first structural schematic diagram of the impeller of the third embodiment of the centrifugal fan of the present invention
  • Fig. 15 is the second structural schematic diagram of the impeller of the third embodiment of the centrifugal fan of the present invention.
  • the centrifugal fan of this embodiment includes a housing 1 and an impeller 2 and a volute tongue 3 arranged in the housing 1.
  • the housing 1 is provided with an air inlet 4 and an air outlet 5, and the worm tongue 3 includes a first volute tongue 31 and a second volute tongue 32 that are stacked and offset from each other.
  • the impeller 2 is a single-layer impeller, and the single-layer impeller includes an impeller portion 23 corresponding to the first worm tongue 31 and the second worm tongue 32.
  • the impeller part 23 includes a plurality of annular blades 231, and the plurality of blades 231 are collectively arranged to guide the air entering the housing 1 from the air inlet 4 to the first volute tongue 31 when the impeller part 23 rotates in a forward or reverse direction. And the second volute tongue 32.
  • the air inlet 4 is provided on the top plate 11 of the housing 1.
  • the air inlet 4 can also be provided on the bottom plate 12 of the housing 1, and the first volute tongue 31 is provided on the upper part of the left side plate 13 of the housing 1. , That is, set close to the top plate 11, the second volute tongue 32 is set on the lower part of the right side plate 14 of the housing 1, that is, set close to the bottom plate 12.
  • the first The worm tongue 31 can cut the air blown from the upper half of the impeller part 23 and guide the air to the air outlet 5.
  • the second worm tongue 32 can The air blown from the lower half of the impeller part 23 cuts and guides the air to the air outlet 5.
  • the plurality of blades 231 are all straight blades and arranged along the radial direction of the single-layer impeller. With this arrangement, when the impeller 2 rotates in the forward and reverse directions, the centrifugal fan can blow out the same amount of wind.
  • the blades 231 can also be set at a specific angle to the radial direction of the single-layer impeller, or the blades 231 can be set in other shapes.
  • the blades 231 can be set as arc-shaped blades (the one shown in Figure 15 is exactly the arc Such flexible adjustments and changes do not deviate from the principle and scope of the present invention, and should be limited to the protection scope of the present invention.
  • an air guiding structure 6 is provided in the impeller 2, and the air guiding structure 6 is arranged to be able to guide the air entering the housing 1.
  • the air guiding structure 6 is an air guiding frustum 6, the tapered end 61 of the air guiding frustum 6 is arranged close to the air inlet 4, and the air enters from the air inlet 4 and flows to the impeller part 23 under the guidance of the air guiding cone 6.
  • the wind guide structure 6 can also be set to other wind guide structures such as triangular pyramids. This adjustment and change of the specific structure of the wind guide structure 6 does not deviate from the principle and scope of the present invention, and should be limited to the present invention. Within the scope of protection.
  • FIG. 16 is a structural schematic diagram of the fourth embodiment of the centrifugal fan of the present invention
  • FIG. 17 is the fourth embodiment of the centrifugal fan of the present invention
  • Fig. 18 is a schematic structural diagram of the impeller of the fourth embodiment of the centrifugal fan of the present invention
  • Fig. 19 is a sectional view of Fig. 18.
  • the centrifugal fan of this embodiment includes a casing 1 and an impeller 2 and a volute tongue 3 arranged in the casing 1.
  • the casing 1 is provided with an air inlet 4 and an air outlet 5, and the worm tongue 3 includes a first volute tongue 31 and a second volute tongue 32 that are stacked and offset from each other.
  • the impeller 2 is a single-layer impeller, and the single-layer impeller includes an impeller portion 23 corresponding to the first worm tongue 31 and the second worm tongue 32.
  • the impeller part 23 includes a plurality of annular blades 231, and the plurality of blades 231 are collectively arranged to guide the air entering the housing 1 from the air inlet 4 to the first volute tongue 31 when the impeller part 23 rotates in a forward or reverse direction. And the second volute tongue 32.
  • the number of the air inlet 4 is two, the air inlet 4 includes a first air inlet 41 and a second air inlet (but not shown in the figure), and the first air inlet 41 and the second air inlet are respectively provided in the housing 1
  • the first air inlet 41 is provided on the top plate 11 of the housing 1
  • the second air inlet is provided on the bottom plate 12 of the housing 1
  • the first volute tongue 31 is provided on the left side plate 13 of the housing 1.
  • the second volute tongue 32 is located at the lower part of the right side plate 14 of the housing 1, that is, near the bottom plate 12, and the impeller 2 rotates in the forward direction (clockwise rotation as seen from the figure),
  • the first worm tongue 31 can cut the air blown from the upper half of the impeller part 23 and guide the air to the air outlet 5.
  • the second worm tongue 32 The air blown from the lower half of the impeller part 23 can be cut and the air can be guided to the air outlet 5.
  • the output shaft of a driving motor (not shown in the figure) for driving the impeller 2 to rotate may extend into the first air inlet 41 or the second air inlet Therefore, it is connected with the impeller 2. If the output shaft of the drive motor extends from the first air inlet 41, it is necessary to set a gap between the drive motor and the first air inlet 41 to avoid affecting the air entering the housing from the first air inlet 41 1. In the same way, if the output shaft of the driving motor extends from the second air inlet, it is necessary to make a gap between the driving motor and the second air inlet to avoid affecting the air entering the housing 1 from the second air inlet.
  • the plurality of blades 231 are all straight blades and are arranged along the radial direction of the single-layer impeller. With this arrangement, when the impeller 2 rotates in the forward and reverse directions, the centrifugal fan can blow out the same amount of wind.
  • the blades 231 can also be set at a specific angle to the radial direction of the single-layer impeller, or the blades 231 can be set in other shapes.
  • the blades 231 can be set as arc-shaped blades, "V"-shaped blades or "L".
  • Such flexible adjustments and changes do not deviate from the principle and scope of the present invention, and should be limited to the protection scope of the present invention.
  • an air guiding structure 6 is provided in the impeller 2, and the air guiding structure 6 is arranged to be able to guide the air entering the housing 1.
  • the air guiding structure 6 includes a first air guiding frustum 6A and a second air guiding frustum 6B that are connected, the conical end 6A1 of the first air guiding frustum 6A is arranged close to the first air inlet 41, and the second air guiding frustum The tapered end 6B1 of 6B is set close to the second air inlet. The air enters from the first air inlet 41 and flows to the upper half of the impeller part 23 under the guidance of the first air guide cone 6A.
  • the second air guide frustum 6B flows downward to the lower half of the impeller portion 23.
  • the wind guide structure 6 can also be set as two connected triangular pyramids and other wind guide structures. This adjustment and change of the specific structure of the wind guide structure 6 does not deviate from the principle and scope of the present invention, and should It is limited within the protection scope of the present invention.
  • the present invention also provides a clothes dryer, which includes the centrifugal fan of the first embodiment, the second embodiment, the third embodiment or the fourth embodiment.

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Abstract

一种离心风机和干衣机，离心风机包括壳体（1）以及设置在壳体（1）中的叶轮（2）和蜗舌（3），壳体（1）上设置有进风口（4）和出风口（5），蜗舌（3）包括层叠且彼此错位设置的第一蜗舌（31）和第二蜗舌（32），第一蜗舌（31）设置为在叶轮（2）正向转动时能够将叶轮（2）吹过来的空气切割并将空气引向出风口（5），第二蜗舌（32）设置为在叶轮（2）反向转动时能够将叶轮（2）吹过来的空气切割并将空气引向出风口（5）。在叶轮（2）正向或反向转动时，第一蜗舌（31）或第二蜗舌（32）能够将叶轮（2）吹过来的空气切割并将空气引向出风口（5），使得离心风机能够在叶轮（2）正向和反向转动时均吹出大量的空气。

Description

离心风机和干衣机 技术领域
本发明属于风机技术领域，具体提供一种离心风机和干衣机。
背景技术
离心风机是根据动能转换为势能的原理，利用高速旋转的叶轮将气体加速，然后减速、改变流向，使动能转换成势能。离心风机包括电机、壳体以及设置在壳体内的叶轮，电机能够驱动叶轮高速转动，以将气体加速，在壳体的出风口处设置有蜗舌，蜗舌可以切割叶轮引动的气流，使气流从出风口排出。
在一些场合中，需要离心风机能够实现正反转，以干衣机为例，为了降低成本，现有的干衣机通常采用一个电机同时驱动烘干筒和离心风机的叶轮旋转，为了解决衣物在烘干筒内缠绕的问题，在干衣机工作过程中，烘干筒需要正反转，叶轮随着烘干筒正向(离心风机的设计方向)转动时，蜗舌可以切割叶轮引动的气流，使气流从出风口排出，然而，当叶轮随着烘干筒反向(与设计方向相反)转动时，蜗舌无法切割叶轮引动的气流，导致从出风口处排出的风量急剧减小，从而影响对衣物的烘干效果。
因此，本领域需要一种新的离心风机和干衣机来解决上述问题。
发明内容
为了解决现有技术中的上述问题，即为了解决现有离心风机的蜗舌在叶轮的转动方向与设计方向相反时无法切割叶轮引动的气流，从而导致离心风机的出风量急剧减小的问题，本发明提供了一种离心风机，所述离心风机包括壳体以及设置在所述壳体中的叶轮和蜗舌，所述壳体上设置有进风口和出风口，所述蜗舌包括层叠且彼此错位设置的第一蜗舌和第二蜗舌，所述叶轮设置为在转动时能够将空气由所述进风口 吸入所述壳体，所述第一蜗舌设置为在所述叶轮正向转动时能够将所述叶轮吹过来的空气切割并将空气引向所述出风口，所述第二蜗舌设置为在所述叶轮反向转动时能够将所述叶轮吹过来的空气切割并将空气引向所述出风口。
在上述离心风机的优选技术方案中，所述叶轮为双层叶轮，所述双层叶轮包括与所述第一蜗舌对应设置的第一层叶轮部和与所述第二蜗舌对应设置的第二层叶轮部，所述第一层叶轮部的轴线与所述第二层叶轮部的轴线重合。
在上述离心风机的优选技术方案中，所述第一层叶轮部包括呈环形设置的多个第一叶片，所述多个第一叶片共同设置为在所述第一层叶轮部正向转动时能够将所述进风口进入所述壳体的空气引向所述第一蜗舌，所述第二层叶轮部包括呈环形设置的多个第二叶片，所述多个第二叶片共同设置为在所述第二层叶轮部反向转动时能够将所述进风口进入所述壳体的空气引向所述第二蜗舌。
在上述离心风机的优选技术方案中，所述第一叶片和所述第二叶片均为弧形叶片，且所述第一叶片的倾斜方向和所述第二叶片的倾斜方向不同。
在上述离心风机的优选技术方案中，所述第一叶片和所述第二叶片均为直叶片，且所述第一叶片的倾斜方向和所述第二叶片的倾斜方向相同或者不同。
在上述离心风机的优选技术方案中，所述叶轮为单层叶轮，所述单层叶轮包括与所述第一蜗舌以及所述第二蜗舌对应设置的叶轮部，所述叶轮部包括环形设置的多个叶片，所述多个叶片共同设置为在所述叶轮部正向或反向转动时都能够将所述进风口进入所述壳体的空气引向所述第一蜗舌以及所述第二蜗舌。
在上述离心风机的优选技术方案中，所述多个叶片均为直叶片且沿所述单层叶轮的径向设置。
在上述离心风机的优选技术方案中，所述进风口的数量为一个，所述进风口设置在所述壳体的一侧。
在上述离心风机的优选技术方案中，所述叶轮中设置有导风结构，所述导风结构设置为能够对进入到所述壳体中的空气进行导向。
在上述离心风机的优选技术方案中，所述导风结构为导风锥台，所述导风锥台的锥端靠近所述进风口设置。
在上述离心风机的优选技术方案中，所述进风口的数量为两个，所述进风口包括第一进风口和第二进风口，所述第一进风口和所述第二进风口分别设置在所述壳体的两侧。
在上述离心风机的优选技术方案中，所述叶轮中设置有导风结构，所述导风结构设置为能够对进入到所述壳体中的空气进行导向。
在上述离心风机的优选技术方案中，所述导风结构包括相连的第一导风锥台和第二导风锥台，所述第一导风锥台的锥端靠近所述第一进风口设置，所述第二导风锥台的锥端靠近所述第二进风口设置。
在另一方面，本发明还提供了一种干衣机，该干衣机包括上述的离心风机。
本领域技术人员能够理解的是，在本发明的优选技术方案中，通过在离心风机的壳体内设置两个蜗舌结构：第一蜗舌和第二蜗舌，且使第一蜗舌和第二蜗舌呈层叠错位设置，例如，将第一蜗舌设置在壳体的左侧板上且靠近壳体的顶板设置，第二蜗舌设置在壳体的右侧板上且靠近壳体的底板设置，在叶轮正向转动时，第一蜗舌能够将叶轮上半部分吹过来的空气切割并将空气引向出风口，在叶轮反向转动时，第二蜗舌能够将叶轮下半部分吹过来的空气切割并将空气引向出风口，通过这样的设置，使得离心风机能够在叶轮正向和反向转动时均吹出大量的空气。
进一步地，叶轮为双层叶轮，双层叶轮包括第一层叶轮部和第二层叶轮部，第一层叶轮部与第一蜗舌相对应，第二层叶轮部与第二蜗舌相对应。通过这样的设置，在实际应中可以根据实际需求灵活地设置第一层叶轮部的叶片的具体形式以及第二层叶轮部的叶片的具体形式，设计更加灵活、多样化，从而能够使离心风机满足更多不同的需求。
进一步地，第一层叶轮部正向转动时，第一叶片能够将进风口进入壳体的空气引向第一蜗舌，从而能够提高离心风机的出风量，同理，第二层叶轮部反向转动时，第二叶片能够将进风口进入壳体的空气引向第二蜗舌，从而能够提高离心风机的出风量，即叶轮正向和反向转动时，均能够提高离心风机的出风量。
进一步地，叶轮为单层叶轮，单层叶轮包括与第一蜗舌以及第二蜗舌对应设置的叶轮部，叶轮部包括环形设置的多个叶片。通过将叶轮设置为单层叶轮，能够降低设计难度，便于加工，从而降低成本。
进一步地，多个叶片均为直叶片且沿单层叶轮的径向设置。通过这样的设置，使得离心风机能够在叶轮正向和反向转动时吹出等量的风。
进一步地，叶轮中设置有导风结构。通过导风结构对进入壳体中的空气进行引导，有利于空气的流动。
进一步地，进风口包括第一进风口和第二进风口，第一进风口和第二进风口分别设置在壳体的两侧。通过设置两个进风口，使空气可以从壳体的两侧同时进入，从而能够提高离心风机的出风量。
进一步地，在进风口数量为两个的情形下，导风结构包括相连的第一导风锥台和第二导风锥台，第一导风锥台的锥端靠近第一进风口设置，第二导风锥台的锥端靠近第二进风口设置。通过第一导风锥台对从第一进风口进入的空气进行引导，通过第二导风锥台对从第二进风口进入的空气进行引导，能够避免空气在叶轮内发生碰撞而发生紊乱，具体而言，在双层叶轮的结构中，第一导风锥台将从第一进风口进入的空气引导至第一叶轮部，第二导风锥台将从第二进风口进入的空气引导至第二叶轮部，从而能够避免空气在叶轮内发生碰撞；在单层叶轮的结构中，第一导风锥台将从第一进风口进入的空气引导至叶轮部的上半部分，第二导风锥台将从第二进风口进入的空气引导至叶轮部的下半部分，从而能够避免空气在叶轮内发生碰撞。
此外，本发明在上述技术方案的基础上进一步提供的干衣机由于采用了上述离心风机，进而具备了上述离心风机所具备的技术效果，相比于改进前的干衣机，本发明的干衣机能够在烘干筒正向和反向转动时均提供足够的风量，从而能够提高对衣物的烘干效果。
附图说明
下面参照附图来描述本发明的优选实施方式，附图中：
图1是本发明的离心风机的实施例一的结构示意图一；
图2是本发明的离心风机的实施例一的结构示意图二；
图3是本发明的离心风机的实施例一的叶轮的结构示意图一；
图4是本发明的离心风机的实施例一的结构示意图三；
图5是本发明的离心风机的实施例一的叶轮的结构示意图二；
图6是本发明的离心风机的实施例二的壳体的结构示意图；
图7是本发明的离心风机的实施例二的结构示意图一；
图8是本发明的离心风机的实施例二的结构示意图二；
图9是本发明的离心风机的实施例二的结构示意图三；
图10是本发明的离心风机的实施例二的叶轮的结构示意图；
图11是图10的剖视图；
图12是本发明的离心风机的实施例三的结构示意图一；
图13是本发明的离心风机的实施例三的结构示意图二；
图14是本发明的离心风机的实施例三的叶轮的结构示意图一；
图15是本发明的离心风机的实施例三的叶轮的结构示意图二；
图16是本发明的离心风机的实施例四的结构示意图一；
图17是本发明的离心风机的实施例四的结构示意图二；
图18是本发明的离心风机的实施例四的叶轮的结构示意图；
图19是图18的剖视图。
具体实施方式
首先，本领域技术人员应当理解的是，下面描述的实施方式仅仅用于解释本发明的技术原理，并非旨在限制本发明的保护范围。
需要说明的是，在本发明的描述中，术语“上”、“下”、“左”、“右”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”等指示方向或位置关系的术语是基于附图所示的方向或位置关系，这仅仅是为了便于描述，而不是指示或暗示所述装置或元件必须具有特 定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性。
此外，还需要说明的是，在本发明的描述中，除非另有明确的规定和限定，术语“安装”、“设置”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域技术人员而言，可根据具体情况理解上述术语在本发明中的具体含义。
基于背景技术指出的现有离心风机的蜗舌在叶轮的转动方向与设计方向相反时无法切割叶轮引动的气流，从而导致离心风机的出风量急剧减小的问题。本发明提供了一种离心风机及干衣机，旨在使离心风机的蜗舌在叶轮正向和反向转动时均能够切割叶轮引动的气流，保证对风量的需求。
具体地，本发明的离心风机包括壳体以及设置在壳体中的叶轮和蜗舌，壳体上设置有进风口和出风口，蜗舌包括层叠且彼此错位设置的第一蜗舌和第二蜗舌，叶轮设置为在转动时能够将空气由进风口吸入壳体，第一蜗舌设置为在叶轮正向转动时能够将叶轮吹过来的空气切割并将空气引向出风口，第二蜗舌设置为在叶轮反向转动时能够将叶轮吹过来的空气切割并将空气引向出风口。即本发明在离心风机的壳体内设置了两个蜗舌结构：第一蜗舌和第二蜗舌，且使第一蜗舌和第二蜗舌呈层叠错位设置，例如将第一蜗舌设置在壳体的左侧板上且靠近壳体的顶板设置，第二蜗舌设置在壳体的右侧板上且靠近壳体的底板设置，在叶轮正向转动时，第一蜗舌能够将叶轮上半部分吹过来的空气切割并将空气引向出风口，在叶轮反向转动时，第二蜗舌能够将叶轮下半部分吹过来的空气切割并将空气引向出风口，通过这样的设置，使得离心风机能够在叶轮正向和反向转动时均吹出大量的空气。下面结合具体实施例来详细地阐述本发明的技术方案。
实施例一
下面结合图1至图5来阐述本发明的实施例一的技术方案，其中，图1是本发明的离心风机的实施例一的结构示意图一，图2是本 发明的离心风机的实施例一的结构示意图二，图3是本发明的离心风机的实施例一的叶轮的结构示意图一，图4是本发明的离心风机的实施例一的结构示意图三，图5是本发明的离心风机的实施例一的叶轮的结构示意图二。
如图1和图2所示，本实施例的离心风机包括壳体1以及设置在壳体1中的叶轮2和蜗舌3，壳体1上设置有进风口4和出风口5，蜗舌3包括叠层且彼此错位设置的第一蜗舌31和第二蜗舌32，叶轮2为双层叶轮，双层叶轮包括与第一蜗舌31对应设置的第一层叶轮部21和与第二蜗舌32对应设置的第二层叶轮部22，第一层叶轮部21的轴线与第二层叶轮部22的轴线重合。其中，进风口4的数量为一个且设置在壳体1的顶板11上，当然，也可以将进风口4设置在壳体1的底板12上，第一蜗舌31设置在壳体1的左侧板13的上部，即靠近顶板11设置，第二蜗舌32设置在壳体1的右侧板14的下部，即靠近底板12设置，叶轮2正向转动(从图上看为顺时针转动)时，第一蜗舌31能够将第一层叶轮部21吹过来的空气切割并将空气引向出风口5，在叶轮2反向转动(从图上看为逆时针转动)时，第二蜗舌32能够将第二层叶轮部22吹过来的空气切割并将空气引向出风口5。
优选地，如图2至图5所示，第一层叶轮部21包括呈环形设置的多个第一叶片211，多个第一叶片211共同设置为在第一层叶轮部21正向转动时能够将进风口4进入壳体1的空气引向第一蜗舌31，第二层叶轮部22包括呈环形设置的多个第二叶片221，多个第二叶片221共同设置为在第二层叶轮部22反向转动时能够将进风口4进入壳体1的空气引向第二蜗舌32。在一种优选的情形中，如图2和图3所示，第一叶片211和第二叶片221均为弧形叶片，第一层叶轮部21正向转动(从图上看为顺时针转动)时，由于第一叶片211顺时针倾斜，所以第一叶片211能够将进风口4进入壳体1的空气引向第一蜗舌31，同理，第二层叶轮部22反向转动(从图上看为逆时针转动)时，由于第二叶片221逆时针倾斜，所以第二叶片221能够将进风口4进入壳体1的空气引向第二蜗舌32，第一叶片211的倾斜方向和第二叶片221的倾斜方向不同。在另一种优选的情形中，如图4和图5所示，第一叶片211和第二叶片221均为直叶片，第一层叶轮部21正向转动(从图上看为顺时针转动) 时，由于第一叶片211顺时针倾斜，所以第一叶片211能够将进风口4进入壳体1的空气引向第一蜗舌31，同理，第二层叶轮部22反向转动(从图上看为逆时针转动)时，由于第二叶片221逆时针倾斜，所以第二叶片221能够将进风口4进入壳体1的空气引向第二蜗舌32，第一叶片211的倾斜方向和第二叶片221的倾斜方向不同。在另一种特殊的优选情形中，第一叶片211和第二叶片221均为直叶片，且第一叶片211和第二叶片221均沿叶轮2的径向设置，在这种特殊的情形下，第一叶片211和第二叶片221的倾斜方向相同。需要说明的是，上述的几种情形仅是优选的情形，第一叶片211和第二叶片221还可以设置为其他的形状，例如，可以将第一叶片211和第二叶片221均设置为“V”形叶片或者“L”形叶片等等，这种灵活地调整和改变并不偏离本发明的原理和范围，均应限定在本发明的保护范围之内。
优选地，如图1和图2所示，叶轮2中设置有导风结构6，导风结构6设置为能够对进入到壳体1中的空气进行导向。其中，导风结构6为导风锥台6，导风锥台6的锥端61靠近进风口4设置，空气从进风口4进入后在导风锥台6的引导下流向第一层叶轮部21和第二层叶轮部22。当然，导风结构6还可以设置为三角锥体等其他导风结构6，这种对导风结构6的具体结构形式的调整和改变并不偏离本发明的原理和范围，均应限定在本发明的保护范围之内。
实施例二
下面结合图6至图11来阐述本发明的实施例二的技术方案，其中，图6是本发明的离心风机的实施例二的壳体的结构示意图，图7是本发明的离心风机的实施例二的结构示意图一，图8是本发明的离心风机的实施例二的结构示意图二，图9是本发明的离心风机的实施例二的结构示意图三，图10是本发明的离心风机的实施例二的叶轮的结构示意图，图11是图10的剖视图。
如图6至图9所示，本实施例的离心风机包括壳体1以及设置在壳体1中的叶轮2和蜗舌3，壳体1上设置有进风口4和出风口5，蜗舌3包括叠层且彼此错位设置的第一蜗舌31和第二蜗舌32，叶轮2为双层叶轮，双层叶轮包括与第一蜗舌31对应设置的第一层叶轮部21和与第二蜗舌32对应设置的第二层叶轮部22，第一层叶轮部21的轴线与 第二层叶轮部22的轴线重合。其中，进风口4的数量为两个，进风口4包括第一进风口41和第二进风口42，第一进风口41和第二进风口42分别设置在壳体1的两侧，可以将第一进风口41设置在壳体1的顶板11上，第二进风口42设置在壳体1的底板12上，第一蜗舌31设置在壳体1的左侧板13的上部，即靠近顶板11设置，第二蜗舌32设置在壳体1的右侧板14的下部，即靠近底板12设置，叶轮2正向转动(从图上看为顺时针转动)时，第一蜗舌31能够将第一层叶轮部21吹过来的空气切割并将空气引向出风口5，在叶轮2反向转动(从图上看为逆时针转动)时，第二蜗舌32能够将第二层叶轮部22吹过来的空气切割并将空气引向出风口5。
需要说明的是，在设置有两个进风口4的情形下，用于驱动叶轮2转动的驱动电机(图中未示出)的输出轴可以从第一进风口41或第二进风口42伸入从而与叶轮2连接，如果驱动电机的输出轴从第一进风口41伸入，需要使驱动电机与第一进风口41之间呈间隙设置，以避免影响空气从第一进风口41进入壳体1，同理，如果驱动电机的输出轴从第二进风口42伸入，需要使驱动电机与第二进风口42之间呈间隙设置，以避免影响空气从第二进风口42进入壳体1。
优选地，如图7至图9所示，与实施例一类似地，在本实施例中，第一层叶轮部21包括呈环形设置的多个第一叶片211，多个第一叶片211共同设置为在第一层叶轮部21正向转动时能够将进风口4进入壳体1的空气引向第一蜗舌31，第二层叶轮部22包括呈环形设置的多个第二叶片221，多个第二叶片221共同设置为在第二层叶轮部22反向转动时能够将进风口4进入壳体1的空气引向第二蜗舌32。在一种优选的情形中，如图7所示，第一叶片211和第二叶片221均为弧形叶片，第一层叶轮部21正向转动(从图上看为顺时针转动)时，由于第一叶片211顺时针倾斜，所以第一叶片211能够将进风口4进入壳体1的空气引向第一蜗舌31，同理，第二层叶轮部22反向转动(从图上看为逆时针转动)时，由于第二叶片221逆时针倾斜，所以第二叶片221能够将进风口4进入壳体1的空气引向第二蜗舌32，第一叶片211的倾斜方向和第二叶片221的倾斜方向不同。在另一种优选的情形中，如图8所示，第一叶片211和第二叶片221均为直叶片，第一层叶轮部21正向转动(从图上 看为顺时针转动)时，由于第一叶片211顺时针倾斜，所以第一叶片211能够将进风口4进入壳体1的空气引向第一蜗舌31，同理，第二层叶轮部22反向转动(从图上看为逆时针转动)时，由于第二叶片221逆时针倾斜，所以第二叶片221能够将进风口4进入壳体1的空气引向第二蜗舌32，第一叶片211的倾斜方向和第二叶片221的倾斜方向不同。在另一种特殊的优选情形中，如图9所示，第一叶片211和第二叶片221均为直叶片，且第一叶片211和第二叶片221均沿叶轮2的径向设置，在这种特殊的情形下，第一叶片211和第二叶片221的倾斜方向相同。需要说明的是，上述的几种情形仅是优选的情形，第一叶片211和第二叶片221还可以设置为其他的形状，例如，可以将第一叶片211和第二叶片221均设置为“V”形叶片或者“L”形叶片等等，这种灵活地调整和改变并不偏离本发明的原理和范围，均应限定在本发明的保护范围之内。
优选地，如图6至图11所示，叶轮2中设置有导风结构6，导风结构6设置为能够对进入到壳体1中的空气进行导向。其中，导风结构6包括相连的第一导风锥台6A和第二导风锥台6B，第一导风锥台6A的锥端6A1靠近第一进风口41设置，第二导风锥台6B的锥端6B1靠近第二进风口42设置，空气从第一进风口41进入后在第一导风锥台6A的引导下流向第一层叶轮部21，空气从第二进风口42进入后在第二导风锥台6B的引导下流向第二层叶轮部22。当然，导风结构6还可以设置为相连的两个三角锥体等其他导风结构，这种对导风结构6的具体结构形式的调整和改变并不偏离本发明的原理和范围，均应限定在本发明的保护范围之内。
实施例三
下面结合图12至图15来阐述本发明的实施例三的技术方案，其中，图12是本发明的离心风机的实施例三的结构示意图一，图13是本发明的离心风机的实施例三的结构示意图二，图14是本发明的离心风机的实施例三的叶轮的结构示意图一，图15是本发明的离心风机的实施例三的叶轮的结构示意图二。
如图12至图14所示，本实施例的离心风机包括壳体1以及设置在壳体1中的叶轮2和蜗舌3，壳体1上设置有进风口4和出风口5，蜗舌3包括叠层且彼此错位设置的第一蜗舌31和第二蜗舌32，叶轮2为 单层叶轮，单层叶轮包括与第一蜗舌31以及第二蜗舌32对应设置的叶轮部23，叶轮部23包括环形设置的多个叶片231，多个叶片231共同设置为在叶轮部23正向或反向转动时都能够将进风口4进入壳体1的空气引向第一蜗舌31以及第二蜗舌32。其中，进风口4设置在壳体1的顶板11上，当然，也可以将进风口4设置在壳体1的底板12上，第一蜗舌31设置在壳体1的左侧板13的上部，即靠近顶板11设置，第二蜗舌32设置在壳体1的右侧板14的下部，即靠近底板12设置，叶轮2正向转动(从图上看为顺时针转动)时，第一蜗舌31能够将叶轮部23上半部分吹过来的空气切割并将空气引向出风口5，在叶轮2反向转动(从图上看为逆时针转动)时，第二蜗舌32能够将叶轮部23下半部分吹过来的空气切割并将空气引向出风口5。
优选地，如图13和图14所示，多个叶片231均为直叶片且沿单层叶轮的径向设置。通过这样的设置，在叶轮2在正向和反向转动时，离心风机能够吹出等量的风。当然，也可以使叶片231与单层叶轮的径向呈特定的角度设置，或者将叶片231设置为其他的形状，例如，可以将叶片231设置为弧形叶片(图15所示的正是弧形叶片)、“V”形叶片、“L”形叶片等等，这种灵活地调整和改变并不偏离本发明的原理和范围，均应限定在本发明的保护范围之内。
优选地，如图12和图13所示，叶轮2中设置有导风结构6，导风结构6设置为能够对进入到壳体1中的空气进行导向。其中，导风结构6为导风锥台6，导风锥台6的锥端61靠近进风口4设置，空气从进风口4进入后在导风锥台6的引导下流向叶轮部23。当然，导风结构6还可以设置为三角锥体等其他导风结构，这种对导风结构6的具体结构形式的调整和改变并不偏离本发明的原理和范围，均应限定在本发明的保护范围之内。
实施例四
下面结合图16至图19来阐述本发明的实施例四的技术方案，其中，图16是本发明的离心风机的实施例四的结构示意图一，图17是本发明的离心风机的实施例四的结构示意图二，图18是本发明的离心风机的实施例四的叶轮的结构示意图，图19是图18的剖视图。
如图16和图17所示，本实施例的离心风机包括壳体1以及设置在壳体1中的叶轮2和蜗舌3，壳体1上设置有进风口4和出风口5，蜗舌3包括叠层且彼此错位设置的第一蜗舌31和第二蜗舌32，叶轮2为单层叶轮，单层叶轮包括与第一蜗舌31以及第二蜗舌32对应设置的叶轮部23，叶轮部23包括环形设置的多个叶片231，多个叶片231共同设置为在叶轮部23正向或反向转动时都能够将进风口4进入壳体1的空气引向第一蜗舌31以及第二蜗舌32。其中，进风口4的数量为两个，进风口4包括第一进风口41和第二进风口(但图中未示出)，第一进风口41和第二进风口分别设置在壳体1的两侧，可以将第一进风口41设置在壳体1的顶板11上，第二进风口设置在壳体1的底板12上，第一蜗舌31设置在壳体1的左侧板13的上部，即靠近顶板11设置，第二蜗舌32设置在壳体1的右侧板14的下部，即靠近底板12设置，叶轮2正向转动(从图上看为顺时针转动)时，第一蜗舌31能够将叶轮部23上半部分吹过来的空气切割并将空气引向出风口5，在叶轮2反向转动(从图上看为逆时针转动)时，第二蜗舌32能够将叶轮部23下半部分吹过来的空气切割并将空气引向出风口5。
需要说明的是，在设置有两个进风口4的情形下，用于驱动叶轮2转动的驱动电机(图中未示出)的输出轴可以从第一进风口41或第二进风口伸入从而与叶轮2连接，如果驱动电机的输出轴从第一进风口41伸入，需要使驱动电机与第一进风口41之间呈间隙设置，以避免影响空气从第一进风口41进入壳体1，同理，如果驱动电机的输出轴从第二进风口伸入，需要使驱动电机与第二进风口之间呈间隙设置，以避免影响空气从第二进风口进入壳体1。
优选地，如图17所示，多个叶片231均为直叶片且沿单层叶轮的径向设置。通过这样的设置，在叶轮2在正向和反向转动时，离心风机能够吹出等量的风。当然，也可以使叶片231与单层叶轮的径向呈特定的角度设置，或者将叶片231设置为其他的形状，例如，可以将叶片231设置为弧形叶片、“V”形叶片或“L”形叶片等等，这种灵活地调整和改变并不偏离本发明的原理和范围，均应限定在本发明的保护范围之内。
优选地，如图16至图19所示，叶轮2中设置有导风结构6，导风结构6设置为能够对进入到壳体1中的空气进行导向。其中，导风结构6包括相连的第一导风锥台6A和第二导风锥台6B，第一导风锥台6A的锥端6A1靠近第一进风口41设置，第二导风锥台6B的锥端6B1靠近第二进风口设置，空气从第一进风口41进入后在第一导风锥台6A的引导下流向叶轮部23的上半部分，空气从第二进风口进入后在第二导风锥台6B的引导下流向叶轮部23的下半部分。当然，导风结构6还可以设置为相连的两个三角锥体等其他导风结构，这种对导风结构6的具体结构形式的调整和改变并不偏离本发明的原理和范围，均应限定在本发明的保护范围之内。
最后，本发明还提供了一种干衣机，该干衣机包括实施例一、实施例二、实施例三或实施例四的离心风机。
至此，已经结合附图所示的优选实施方式描述了本发明的技术方案，但是，本领域技术人员容易理解的是，本发明的保护范围显然不局限于这些具体实施方式。在不偏离本发明的原理的前提下，本领域技术人员可以对相关技术特征作出等同的更改或替换，这些更改或替换之后的技术方案都将落入本发明的保护范围之内。

Claims (14)

  1. 一种离心风机，其特征在于，所述离心风机包括壳体以及设置在所述壳体中的叶轮和蜗舌，所述壳体上设置有进风口和出风口，所述蜗舌包括层叠且彼此错位设置的第一蜗舌和第二蜗舌，所述叶轮设置为在转动时能够将空气由所述进风口吸入所述壳体，所述第一蜗舌设置为在所述叶轮正向转动时能够将所述叶轮吹过来的空气切割并将空气引向所述出风口，所述第二蜗舌设置为在所述叶轮反向转动时能够将所述叶轮吹过来的空气切割并将空气引向所述出风口。
  2. 根据权利要求1所述的离心风机，其特征在于，所述叶轮为双层叶轮，所述双层叶轮包括与所述第一蜗舌对应设置的第一层叶轮部和与所述第二蜗舌对应设置的第二层叶轮部，所述第一层叶轮部的轴线与所述第二层叶轮部的轴线重合。
  3. 根据权利要求2所述的离心风机，其特征在于，所述第一层叶轮部包括呈环形设置的多个第一叶片，所述多个第一叶片共同设置为在所述第一层叶轮部正向转动时能够将所述进风口进入所述壳体的空气引向所述第一蜗舌，所述第二层叶轮部包括呈环形设置的多个第二叶片，所述多个第二叶片共同设置为在所述第二层叶轮部反向转动时能够将所述进风口进入所述壳体的空气引向所述第二蜗舌。
  4. 根据权利要求3所述的离心风机，其特征在于，所述第一叶片和所述第二叶片均为弧形叶片，且所述第一叶片的倾斜方向和所述第二叶片的倾斜方向不同。
  5. 根据权利要求3所述的离心风机，其特征在于，所述第一叶片和所述第二叶片均为直叶片，且所述第一叶片的倾斜方向和所述第二叶片的倾斜方向相同或者不同。
  6. 根据权利要求1所述的离心风机，其特征在于，所述叶轮为单层叶轮，所述单层叶轮包括与所述第一蜗舌以及所述第二蜗舌对应设置的叶轮部，所述叶轮部包括环形设置的多个叶片，所述多个叶片共同设置为在所述叶轮部正向或反向转动时都能够将所述进风口进入所述壳体的空气引向所述第一蜗舌以及所述第二蜗舌。
  7. 根据权利要求6所述的离心风机，其特征在于，所述多个叶片均为直叶片且沿所述单层叶轮的径向设置。
  8. 根据权利要求1至7中任一项所述的离心风机，其特征在于，所述进风口的数量为一个，所述进风口设置在所述壳体的一侧。
  9. 根据权利要求8所述的离心风机，其特征在于，所述叶轮中设置有导风结构，所述导风结构设置为能够对进入到所述壳体中的空气进行导向。
  10. 根据权利要求9所述的离心风机，其特征在于，所述导风结构为导风锥台，所述导风锥台的锥端靠近所述进风口设置。
  11. 根据权利要求1至7中任一项所述的离心风机，其特征在于，所述进风口的数量为两个，所述进风口包括第一进风口和第二进风口，所述第一进风口和所述第二进风口分别设置在所述壳体的两侧。
  12. 根据权利要求11所述的离心风机，其特征在于，所述叶轮中设置有导风结构，所述导风结构设置为能够对进入到所述壳体中的空气进行导向。
  13. 根据权利要求12所述的离心风机，其特征在于，所述导风结构包括相连的第一导风锥台和第二导风锥台，所述第一导风锥台的锥端靠近所述第一进风口设置，所述第二导风锥台的锥端靠近所述第二进风口设置。
  14. 一种干衣机，其特征在于，所述干衣机包括权利要求1至13中任一项所述的离心风机。
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