WO2022099845A1 - 叶轮、排水泵及空调室内机 - Google Patents

叶轮、排水泵及空调室内机 Download PDF

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Publication number
WO2022099845A1
WO2022099845A1 PCT/CN2020/136024 CN2020136024W WO2022099845A1 WO 2022099845 A1 WO2022099845 A1 WO 2022099845A1 CN 2020136024 W CN2020136024 W CN 2020136024W WO 2022099845 A1 WO2022099845 A1 WO 2022099845A1
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WO
WIPO (PCT)
Prior art keywords
impeller
plate
hole
balance
long
Prior art date
Application number
PCT/CN2020/136024
Other languages
English (en)
French (fr)
Inventor
顾文海
高振刚
Original Assignee
威灵（芜湖）电机制造有限公司
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
Priority claimed from CN202022619235.2U external-priority patent/CN213511344U/zh
Priority claimed from CN202011262086.7A external-priority patent/CN114483639A/zh
Application filed by 威灵（芜湖）电机制造有限公司 filed Critical 威灵（芜湖）电机制造有限公司
Priority to EP20961399.1A priority Critical patent/EP4206478A4/en
Publication of WO2022099845A1 publication Critical patent/WO2022099845A1/zh
Priority to US18/135,478 priority patent/US20230250830A1/en

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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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2261—Rotors specially for centrifugal pumps with special measures
    • F04D29/2266—Rotors specially for centrifugal pumps with special measures for sealing or thrust balance
    • 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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/24—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
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid 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
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type

Definitions

  • the present application relates to the technical field of refrigeration equipment, in particular to an impeller, a drainage pump and an air conditioner indoor unit.
  • a drain pump is generally installed on the condensed water pan of the indoor unit of the air conditioner. Under the premise of meeting the specified flow and head, such drainage pumps also need to ensure that the working noise is limited within the specified range to meet the strict requirements of the air conditioning system for noise.
  • the impeller is an important part of the drainage pump. During operation, the impeller is driven by the motor to rotate, so that a vacuum is generated in the middle of the impeller, water is sucked into the impeller, and then the water is discharged through high-speed rotation.
  • the existing drainage pump when the water level of the condensate pan is low, water and air are sucked into the drainage pump at the same time, and a water-vapor mixed state of half water and half steam is formed in the impeller, and the amount of water distributed in the impeller is uneven, resulting in unbalanced vibration. , which makes the working noise of the drainage pump louder, which brings great trouble to the user. With the increasing demands of people on the quality of life, how to reduce the working noise of the drainage pump has become an urgent problem to be solved.
  • One of the purposes of the embodiments of the present application is to provide an impeller, a drainage pump and an indoor unit of an air conditioner, which can solve the problem of high noise when the drainage pump works in the prior art.
  • a first aspect provides an impeller, the impeller comprising: an impeller shaft; long blades fixedly connected to the impeller shaft and extending radially outward of the impeller shaft; a disk comprising a plate-like structure , the plate-shaped structure is sleeved on the outer circumference of the impeller shaft, and at least one balance through hole connecting the front side and the rear side of the plate-shaped structure is opened on the plate-shaped structure.
  • At least one balance through hole is formed in the plate-like structure, so that when water and air are sucked into the impeller cavity together, the air can be discharged out of the cavity through the balance through hole, thereby balancing the inner cavity of the impeller and the cavity of the impeller.
  • the pressure difference in the outer cavity reduces the axial force, thus reducing the vibration of the impeller caused by the pressure difference during operation, thereby reducing the noise generated by the impeller during operation.
  • the balance through hole of the present application is opened on the plate-like structure, and the bottom of the long blade is fixed on the plate-like structure, so that the water throwing direction of the long blade and the axis direction of the balance through hole are perpendicular to each other, and are thrown out by the long blade.
  • the water can not directly enter the balance through hole, so that the whistling sound caused by the gas-liquid mixture passing through the small hole or slit quickly will not be produced, which is beneficial to further reduce the noise generated by the impeller during operation.
  • a connection hole may be provided at the top end of the impeller shaft, thereby facilitating the fixed connection between the impeller and the motor output shaft.
  • the impeller shaft and the motor output shaft can be splined.
  • an inner spline can be arranged in the connecting hole
  • an outer spline can be arranged on the outer wall of the motor output shaft
  • the motor output shaft extends into the connecting hole so that the inner spline and the outer spline are fixedly connected, thereby making the motor output shaft and the blade
  • a plurality of long blades can be provided and evenly surround the outer peripheral wall of the impeller shaft.
  • the long blades are arranged in number and evenly surround the outer peripheral wall of the impeller shaft, and the included angle formed between two adjacent long blades is both 90 degrees.
  • the four long leaves are in a "cross" shape.
  • more or less long blades may also be provided, which is not limited in this application.
  • a plurality of the balanced through holes are provided, and are evenly distributed at the outer edge of the plate-like structure.
  • the air bubbles in the impeller cavity move with the water flow. Under the action of the long blades, the water flow near the outer edge is faster and the air bubbles are more easily discharged. Therefore, arranging the balance through hole at the outer edge of the plate-like structure can Improve the air discharge efficiency, which is beneficial to reduce the noise generated by the impeller during operation.
  • the balance through hole may be opened between two adjacent blades.
  • the balanced through hole may be a circular hole with a diameter of 1.0-3.0 mm, for example, may be 1.5 mm, 1.8 mm, 2.0 mm, 2.3 mm, 2.5 mm, 2.8 mm, etc.
  • the diameter of the balance through hole is too large or too small. It is not suitable for the hole diameter to be too large. It is easy to reduce the suction of the impeller, which in turn will reduce the lift and displacement of the drainage pump. If the aperture is too small, the air discharge effect (ie the air pressure balance effect) will not be obvious.
  • the aperture of the balance through hole can be set according to the water flow speed. The larger the flow rate, the larger the aperture can be set.
  • the balance through hole is set at the outer edge of the plate-like structure, and the selection range of the aperture can be 1.0 ⁇ 3.0 mm.
  • the cross-sectional shape of the balance through hole may be an ellipse, a rectangle, a triangle, a rhombus, a trapezoid, or a waist, etc., which is not limited in this application.
  • each balanced through hole may be the same or different, which is not limited in this application.
  • the diameter of each balancing through hole in the axial direction may be the same or different, which is not limited in this application.
  • the diameter of the balance through hole in the axial direction becomes gradually larger or smaller in the direction toward the front side of the plate-like structure.
  • a plurality of balanced through holes may also be provided at other positions (eg, the middle) of the plate-like structure, and arranged in other ways (eg, may be non-uniformly arranged), this application Not limited.
  • the disc further includes an annular structure fixedly connected with the outer edge of the plate-like structure, the annular structure is disposed on the outer circumference of the long blade, and is connected with the long blade gaps are formed between them.
  • the annular structure surrounds the long blades, which makes the water discharged from the impeller (that is, the water thrown out by the blades) be blocked by the annular structure to reduce the flow rate before hitting the inner wall of the pump casing to generate noise, thereby helping to reduce the impact of the impeller during operation. noise.
  • a gap is formed between the annular structure and the outer end of the long blade.
  • the gap may be 1-2 mm.
  • it may be 1.2 mm, 1.5 mm or 1.8 mm.
  • the size of the gap formed between the plurality of long blades and the annular structure may be the same or different, which is not limited in this application.
  • the height of the annular structure is higher than the height of the long blades.
  • the upper end of the annular structure is higher than the upper end of the long blade, so as to ensure that the impeller has sufficient suction, thereby ensuring that the drainage pump has sufficient drainage capacity.
  • At least one short blade is arranged on the plate-like structure and located between two adjacent long blades.
  • the balance through hole is arranged between two adjacent blades, and a gap is formed between the balance through hole and the annular structure.
  • a gap is formed between the outer end of the short blade and the annular structure.
  • the size of the gap formed between the plurality of short blades and the annular structure may be the same or different, which is not limited in this application.
  • the size of the gap formed between the short blade, the long blade and the annular structure may be the same or different, which is not limited in this application.
  • a plurality of short blades may be arranged between two adjacent long blades, the plurality of short blades are plate-shaped, and the lengths may be the same or different.
  • the short blades are the same height as the long blades.
  • the tips of the short blades can also be higher or lower than the tips of the long blades.
  • the plate-like structure in the direction toward the long blade, is gradually inclined and raised from the center to the outer direction.
  • the plate-like structure forms a "funnel"-like structure as a whole, which can better push and guide the water flow, avoid the water flow from falling back after being lifted, and the water flow is lifted smoothly, which is conducive to reducing noise.
  • the plate-like structure is fixedly connected to the bottom of the long blade.
  • the end of the impeller shaft facing away from the long blade is further provided with a diversion blade, the diversion blade is connected with the long blade in a one-to-one correspondence, and the long blade is located on the impeller shaft
  • the length in the radial direction is greater than the length of the guide vane.
  • the number of the guide vanes and the long vanes is the same, and both can be four, and the whole is in a "cross"-shaped structure.
  • the diversion vanes are immersed in the water together with the water suction port of the drainage pump, and the agitation of the diversion vanes to the water lifts the water into the inner cavity of the impeller.
  • the width of the drainage vanes along the water flow direction can be gradually increased, and the overall smooth transition.
  • the impeller is integrally formed by an injection molding process. In turn, it is beneficial to improve the overall mechanical strength of the impeller.
  • the impeller can also be made by other integral molding.
  • the impeller can be a metal piece, and in this case, an integrated structure can be formed by a process such as forging.
  • a drainage pump including a pump casing, a motor, and the impeller provided in any of the possible designs of the foregoing first aspect, the impeller is movably accommodated in the pump casing, and the motor has an impeller.
  • the output shaft is fixedly connected with the impeller shaft.
  • a suction port and a drain port are respectively provided on the pump casing, the motor drives the impeller to rotate, and under the action of centrifugal force, water is sucked into the pump casing through the suction port, and then discharged through the drain port.
  • the drain pump further includes a power cord connected to the motor to supply power to the motor.
  • the motor may be a single-phase permanent magnet synchronous motor.
  • the motor may include a stator, a rotor, and a motor output shaft.
  • the stator drives the rotor to rotate, and drives the impeller to rotate through the motor output shaft and the impeller shaft. Because the structure of the impeller is optimized in the present application, the pressure difference between the inside and outside of the impeller is balanced, the vibration of the impeller during operation is reduced, and the noise generated by the impeller during operation can be reduced.
  • the pump casing can be made of plastic material, which is beneficial to reduce the overall weight of the drainage pump.
  • the pump housing may include an upper pump housing and a lower pump housing, and the upper pump housing and the lower pump housing may be detachably connected by screws, snaps, etc. to form an integral structure, thereby defining the accommodating cavity of the drainage pump, The impeller is accommodated in the accommodating cavity.
  • the motor is also arranged in the accommodating cavity.
  • the motor may also be disposed outside the accommodating cavity, and the motor output shaft extends into the accommodating cavity from the outside of the pump casing and is fixedly connected with the impeller shaft.
  • the drainage pump adopts the impeller provided in the above embodiment, the drainage pump also has the technical effect corresponding to the aforementioned impeller, which will not be repeated here.
  • an air conditioner indoor unit including a condensate water pan and the drain pump provided in the second aspect, wherein a water suction port of the drain pump is communicated with the condensate water pan, so that the drain pump can The condensate water accumulated by the condensate pump is discharged.
  • the air conditioner indoor unit adopts the impeller provided in the above embodiment, the air conditioner indoor unit also has the technical effect corresponding to the aforementioned impeller, which will not be repeated here.
  • the impeller provided by the present application has at least one balance through hole in the plate-like structure, so that when water and air are sucked into the impeller cavity together, The air can be discharged to the outside of the cavity through the balance through hole, which can balance the pressure difference between the inner cavity and the outer cavity of the impeller, reduce the axial force, and thus reduce the vibration of the impeller caused by the pressure difference during operation, thereby reducing the impeller. noise during work.
  • the balance through hole of the present application is opened on the plate-like structure, and the bottom of the long blade is fixed on the plate-like structure, so that the water throwing direction of the long blade and the axis direction of the balance through hole are perpendicular to each other, and are thrown out by the long blade.
  • the water can not directly enter the balance through hole, so that the whistling sound caused by the gas-liquid mixture passing through the small hole or slit quickly will not be produced, which is beneficial to further reduce the noise generated by the impeller during operation.
  • the drainage pump adopts the impeller provided in the above embodiment, the drainage pump also has the technical effect corresponding to the aforementioned impeller, which will not be repeated here.
  • the air conditioner indoor unit adopts the impeller provided in the above embodiment, the air conditioner indoor unit also has the technical effect corresponding to the aforementioned impeller, which will not be repeated here.
  • FIG. 1 is a schematic diagram of the overall structure of an impeller provided in an embodiment of the present application from a perspective;
  • FIG. 2 is a schematic diagram of the overall structure of the impeller provided by the embodiment of the present application from another perspective;
  • FIG. 3 is a top view of an impeller provided in an embodiment of the present application.
  • FIG. 5 is a schematic diagram of the overall structure of the drainage pump provided by the embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of an air conditioner indoor unit provided by an embodiment of the present application.
  • the terms “installed”, “connected” and “connected” should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be mechanical connection, electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction of two elements relation.
  • installed should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be mechanical connection, electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction of two elements relation.
  • orientation or positional relationship indicated by the terms “upper”, “lower”, “side”, “inner”, “outer”, “top”, “bottom”, etc. is based on the installation
  • the orientation or positional relationship is only for the convenience of describing the application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the application .
  • FIG. 1 is a schematic diagram of the overall structure of an impeller 10 provided in an embodiment of the present application from a perspective.
  • FIG. 2 is a schematic diagram of the overall structure of the impeller 10 provided by the embodiment of the present application from another perspective.
  • FIG. 3 is a top view of the impeller 10 provided by the embodiment of the present application.
  • FIG. 4 is a partial cross-sectional view of the impeller 10 provided by the embodiment of the present application.
  • the impeller 10 provided in the embodiment of the present application includes: an impeller shaft 11 , a long blade 12 and a disk 13 .
  • the impeller shaft 11 is used for fixed connection with the motor output shaft of the drainage pump, and the entire impeller 10 is driven to rotate by the motor through the impeller shaft 11 , and then the water can be sucked into the drainage pump.
  • a connection hole 111 may be opened at the top end of the impeller shaft 11 , thereby facilitating the fixed connection between the impeller 10 and the motor output shaft.
  • the impeller shaft 11 and the motor output shaft may be connected by splines.
  • an inner spline can be arranged in the connecting hole 111
  • an outer spline can be arranged on the outer wall of the motor output shaft
  • the motor output shaft extends into the connecting hole 111 so that the inner spline and the outer spline are fixedly connected, thereby making the motor output shaft
  • the transmission connection with the impeller shaft 11 is realized.
  • the motor output shaft may also be drive-connected to the impeller shaft 11 in other ways, and the motor output shaft and the impeller shaft 11 may be directly connected or indirectly connected through an intermediate medium, which is not discussed in this application. Do limit.
  • the long blade 12 has a plate shape, one end is fixedly connected to the impeller shaft 11 , and the other end extends radially from the impeller shaft 11 . That is, the long vanes 12 extend outward in the radial direction of the impeller shaft 11 , and the long vanes 12 are radially arranged around the axis of the impeller shaft 11 . Driven by the impeller shaft 11 , the long blades 12 rotate to generate suction, so that the water can be sucked into the inner cavity of the drainage pump, and the water can be further thrown out from the inner cavity of the impeller 10 .
  • a plurality of long blades 12 may be provided, and evenly surround the outer peripheral wall of the impeller shaft 11, and the included angle formed between two adjacent long blades 12 may be the same. As shown in FIGS. 1 and 3 , in the embodiment of the present application, four long blades 12 are set, which are evenly surrounded on the outer peripheral wall of the impeller shaft 11 , and the included angle formed between two adjacent long blades 12 is 90 degrees. At this time, the four long blades 12 have a "cross"-shaped structure.
  • more or less long blades 12 may also be provided, which is not limited in this application.
  • the long blades 12 may be provided in 3, 5 or 6 pieces.
  • the plurality of long blades 12 are evenly surrounded on the outer peripheral wall of the impeller shaft 11, and the included angle formed between two adjacent long blades 12 will be 120 degrees, 72 degrees or 60 degrees.
  • the disk 13 is sleeved on the outer circumference of the impeller shaft 11 , the disk 13 includes a plate-like structure 131 , and the plate-like structure 131 is fixedly connected to the bottom of the long blade 12 .
  • the long blades 12 can be vertically arranged on the plate-like structure 131, and the plate-like structure 131 can provide a supporting force to the long blades 12, thereby improving the mechanical strength of the impeller.
  • the plate-like structure 131 is sleeved on the outer circumference of the impeller shaft 11 , the plate-like structure 131 and the long blades 12 are arranged in sequence along the axial direction of the impeller shaft, and each long blade 12 is fixedly connected to the plate-like structure 131 .
  • the plate-like structure 131 is provided with at least one balance through hole 16 connecting the inner side and the outer side of the disk 13 .
  • at least one balance through hole 16 may be provided, or a plurality of them, such as 2, 3, 6, 8 or more, may be provided.
  • the balance through hole 16 can communicate with the front side and the rear side of the plate structure 131 , in other words, the balance through hole 16 can communicate with the inner side and the outer side of the impeller 10 , so that the air pressure inside and outside the impeller 10 can be balanced.
  • At least one balance through hole 16 is formed in the plate-like structure 131, so that when water and air are sucked into the impeller cavity together (for example, from the water inlet through hole 17 to be described below) Inhalation), the air can be discharged to the outside of the cavity through the balance through hole 16, which can balance the pressure difference between the inner cavity and the outer cavity of the impeller 10, reduce the axial force, and thus reduce the vibration of the impeller 10 due to the pressure difference during operation. , thereby further reducing the noise generated by the impeller 10 during operation.
  • the balance through hole 16 of the present application is opened in the plate-like structure 131, and the bottom of the long blade 12 is fixed on the plate-like structure 131, so that the water throwing direction of the long blade 12 and the axis direction of the balance through hole 16 are perpendicular to each other, The water thrown out by the long blades 12 cannot directly enter the balance through hole 16, so that the whistling sound caused by the gas-liquid mixture passing through the small holes or slits quickly will not be produced, which is beneficial to further reduce the generation of the impeller 10 during operation. noise.
  • balancing through holes 16 are arranged between the long blades 12 . That is to say, the opening position of the balance through hole 16 should avoid the long blade 12, and not intersect or penetrate the long blade 12, so that the air discharge efficiency can be improved, the noise generated by the impeller 10 during operation can be reduced, and the user's safety can be improved. Use experience.
  • a plurality of balanced through holes 16 are provided, and are evenly arranged at the outer edge of the plate-like structure 131 .
  • the air bubbles in the cavity of the impeller 10 move with the water flow. Under the action of the long blades 12, the water flow speed near the outer edge is faster, and the air bubbles are more easily discharged. Therefore, the balance through hole 16 is arranged in the plate structure 131. At the outer edge, the air discharge efficiency can be improved, thereby helping to reduce the noise generated by the impeller 10 during operation.
  • the balance through hole 16 may be a circular hole with a diameter of 1.0-3.0 mm, for example, may be 1.5 mm, 1.8 mm, 2.0 mm, 2.3 mm, 2.5 mm or 2.8 mm, etc. Too large or too small a diameter of the balance through hole 16 is unsuitable. Too large a diameter will easily reduce the suction force of the impeller 10, thereby reducing the lift and displacement of the drainage pump. If the aperture is too small, the air discharge effect (ie the air pressure balance effect) will not be obvious. In the embodiment of the present application, the aperture of the balance through hole 16 can be set according to the water flow speed. The larger the flow rate, the larger the aperture can be set.
  • the balance through hole 16 is arranged at the outer edge of the plate-like structure 131, and the selection range of the aperture It can be 1.0 ⁇ 3.0 mm.
  • the cross-sectional shape of the balance through hole 16 may be an ellipse, a rectangle, a triangle, a rhombus, a trapezoid, or a waist shape, etc., which is not limited in this application.
  • each balance through hole 16 may be the same or different, which is not limited in this application.
  • each balance through hole 16 in the axial direction may be the same or different, which is not limited in this application.
  • the diameter of the balance through hole 16 becomes gradually larger or smaller in the axial direction along the direction toward the front side of the plate-like structure.
  • the plurality of balance through holes 16 may also be disposed at other positions (eg, the middle) of the plate-like structure 131 and arranged in other ways (eg, non-uniformly arranged). This is not limited.
  • the disk 13 further includes an annular structure 132 fixedly connected to the outer edge of the plate-like structure 131 .
  • the annular structure 132 is disposed on the outer circumference of the long blade 12 and is connected to A gap S is formed between the outer ends of the long blades 12 .
  • the annular structure 132 surrounds the long blades 12 , which makes the water discharged from the impeller 10 (that is, the water thrown out by the blades) be blocked by the annular structure 132 to reduce the flow velocity before hitting the inner wall of the pump casing to generate noise, thereby helping to reduce the impeller 10 . noise during work.
  • a gap S is formed between the annular structure 132 and the outer end of the long blade 12.
  • the gap S may be 1-2 mm.
  • it may be 1.2 mm, 1.5 mm or 1.8 mm.
  • the size of the gap formed between the plurality of long blades 12 and the annular structure 132 may be the same or different, which is not limited in this application.
  • the upper end of the annular structure 132 is higher than the upper end of the long blade 12 , so as to ensure that the impeller 10 has sufficient suction, Thus, it can be ensured that the drainage pump has sufficient drainage capacity.
  • At least one short blade 14 is disposed on the plate-like structure 131 and located between the two adjacent long blades 12 .
  • the outer end of the short blade 14 ie the end away from the impeller shaft 14 ) is A gap is formed between the annular structures 132 .
  • the length of the short blades 14 is smaller than that of the long blades 12, the short blades 14 are arranged radially, extend outward along the radial direction of the impeller shaft 11, and the bottom is fixedly connected with the plate-like structure 131, and the short blades 14 can be perpendicular to the plate-like structure. 131. Similar to the long blades 12 , a gap is also formed between the outer ends of the short blades 14 and the annular structure 132 , so that the noise generated by the impeller 10 during operation can be further reduced.
  • each short blade 14 is disposed between two adjacent long blades 12 , and the lengths of each short blade 14 may be the same or different, which is not limited in this application.
  • the size of the gap formed between the plurality of short blades 14 and the annular structure 132 may be the same or different, which is not limited in this application.
  • the size of the gap formed between the short blade 14, the long blade 12 and the annular structure 132 may be the same or different, which is not limited in this application.
  • more or less short blades 14 may be disposed between two adjacent long blades 12 , for example, one, two, or four short blades 14 may be disposed, which is not limited in this application.
  • the balance through hole 16 may be opened between two adjacent blades. For example, it is opened between adjacent long blades 12 and short blades 14 , and between two adjacent short blades 14 .
  • the opening position of the balance through hole 16 should avoid the long blade 12 , the short blade 14 and the annular structure 132 , and not intersect with or penetrate the long blade 12 , the short blade 14 and the annular structure 132 , that is, the balance of the through hole 16
  • a gap is formed between the hole wall and the inner wall of the annular structure 132. While improving the air discharge efficiency, it can ensure that the air will not be discharged from the side of the impeller 10, which is beneficial to reduce the noise generated by the impeller 10 during operation, and can improve the user experience. user experience.
  • the upper end of the annular structure 132 is higher than the upper end of the short blade 14, so as to ensure that the impeller 10 has sufficient suction force, and thus can ensure that the drainage pump has sufficient drainage capacity.
  • the short blades 14 are the same height as the long blades 12 .
  • the tips of the short blades 14 may also be higher or lower than the tips of the long blades 12 .
  • a water inlet through hole 17 is formed in the middle of the plate-like structure 131 , and the impeller shaft 11 is penetrated in the water inlet through hole 17 .
  • the diameter of the water inlet through hole 17 is larger than the shaft diameter of the impeller shaft 11 . .
  • the diameter of the water inlet through hole 17 is larger than the shaft diameter of the impeller shaft 11 , so that the water flow can pass through the gap formed between the hole wall of the water inlet through hole 17 and the outer wall of the impeller shaft 11 and enter the inner cavity of the impeller 10 .
  • the bottom of the impeller shaft 11 is also fixedly connected with guide vanes 15 .
  • the end of the impeller shaft 11 facing away from the long blades 12 is also provided with a number of guide vanes 15 . connect.
  • the diversion blade 15 is immersed in the water together with the water suction port of the drainage pump, and the agitation of the diversion blade 15 to the water lifts the water into the inner cavity of the impeller 10 .
  • the width of the drainage vane 15 in the direction of the water flow can be gradually increased, and the overall smooth transition.
  • each guide vanes 15 is also provided correspondingly, and each is fixedly connected with one long vane 12 . At this time, the four guide vanes 15 also have a "cross"-shaped structure as a whole.
  • the plate-like structure 131 in the direction toward the long blade 12 , the plate-like structure 131 is gradually inclined and raised from the center to the outer direction. At this time, the whole of the plate-like structure 131 is a smooth circular arc slope. That is, in the direction toward the long blade 12 , the plate-like structure 131 extends obliquely from the center outward toward the axis of the impeller shaft 11 .
  • the plate-like structure is formed into a "funnel"-like structure as a whole, which can better push and guide the water flow, avoid the water flow from falling back after being lifted, and the water flow is lifted smoothly, which is conducive to reducing noise.
  • the impeller 10 in order to improve the mechanical strength of the impeller 10 , the impeller 10 may be formed into an integral structure through an integral molding process.
  • the impeller 10 may be a plastic part and integrally formed by an injection molding process.
  • the impeller can also be made by other integral molding.
  • the impeller can be a metal piece, and in this case, an integrated structure can be formed by a process such as forging.
  • the embodiment of the present application further provides a drainage pump 100 .
  • the drainage pump 100 can be applied to electric appliances that have drainage requirements, such as an air conditioner indoor unit, a washing machine, a dishwasher, etc., which is not limited in this application.
  • FIG. 5 is a schematic diagram of the overall structure of the drainage pump 100 provided by the embodiment of the present application.
  • the drainage pump 100 provided by the embodiment of the present application includes the impeller 10 , the pump casing 20 and the motor 30 provided by the foregoing embodiments. in,
  • An accommodating cavity is formed inside the pump casing 20 , and the impeller 10 and the motor 30 are arranged in the accommodating cavity.
  • the impeller 10 is movably accommodated in the pump casing 20 , and the output shaft of the motor 30 is fixedly connected to the impeller shaft 11 , thereby driving the impeller 10 to rotate to generate suction.
  • the pump casing 20 can be made of plastic material, which is beneficial to reduce the overall weight of the drainage pump.
  • the pump housing 20 may include an upper pump housing and a lower pump housing, and the upper pump housing and the lower pump housing may be detachably connected by screws, snaps, etc. to form an integral structure, thereby defining the accommodating cavity.
  • the motor 30 is also disposed in the accommodating cavity.
  • the motor 30 may also be disposed outside the accommodating cavity, and the motor output shaft extends into the accommodating cavity from the outside of the pump casing and is fixedly connected with the impeller shaft 11 .
  • the pump casing 20 is provided with a water suction port 40 and a water discharge port 50 respectively.
  • the motor 30 drives the impeller 10 to rotate. Under the action of centrifugal force, water is sucked into the pump casing 20 through the suction port 40 and then discharged through the water discharge port 50 .
  • the drainage pump 100 further includes a power cord 60 , and the power cord 60 is connected to the motor 30 to supply power to the motor 30 .
  • the motor 30 may be a single-phase permanent magnet synchronous motor.
  • the motor 30 may include a stator, a rotor, and a motor output shaft.
  • the stator drives the rotor to rotate, and drives the impeller 10 to rotate through the motor output shaft and the impeller shaft 12 . Because the structure of the impeller 10 is optimized in the present application, the pressure difference between the inside and outside of the impeller 10 is balanced, the vibration of the impeller 10 during operation is reduced, and the noise generated by the impeller 10 during operation can be reduced.
  • the drainage pump 100 adopts the impeller 10 provided in the above embodiment, the drainage pump 100 also has the technical effect corresponding to the aforementioned impeller 10 , which is not repeated here.
  • FIG. 6 is a schematic structural diagram of an air conditioner indoor unit 1000 provided by an embodiment of the present application.
  • the air conditioner indoor unit 1000 provided by the embodiment of the present application includes the drain pump 100 and the condensate pan 200 provided by the foregoing embodiments.
  • the water suction port 40 of the drain pump 100 communicates with the condensed water pan 200 , so that the condensed water accumulated in the condensed water pan 200 can be discharged.
  • the air conditioner indoor unit 1000 further includes an evaporator 300 , and a condensate water pan 200 is disposed below the evaporator 300 for collecting condensed water condensed and dropped on the surface of the evaporator 300 .
  • the condensate pan may also be commonly referred to as a sump pan, a sump pan, or the like.
  • an indoor fan 400 is correspondingly provided on one side of the evaporator 300 .
  • the indoor fan 400 may be an EC fan.
  • the EC fan has the advantages of energy saving, high efficiency, low vibration and low noise.
  • the air conditioner indoor unit 1000 adopts the impeller 10 provided in the above embodiment, the air conditioner indoor unit 1000 also has the technical effect corresponding to the aforementioned impeller 10 , which will not be repeated here.

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Abstract

一种叶轮、排水泵及空调室内机，所述叶轮（10）包括：叶轮轴（11）；长叶片（12），固定连接于叶轮轴（11）上，并且沿叶轮轴（11）的径向向外延伸；圆盘（13），包括板状结构（131），所述板状结构（131）套接于所述叶轮轴（11）的外周，所述板状结构（131）上开设有至少一个连通所述板状结构（131）前侧和后侧的平衡通孔（16）。通过在板状结构（131）上开设至少一个平衡通孔（16），当水和空气一同被吸入叶轮腔内时，空气可以通过该平衡通孔（16）排出到腔外，能够减小叶轮（10）在工作时由于压力差引起的振动，从而能够减小叶轮（10）在工作时产生的噪音。

Description

叶轮、排水泵及空调室内机
本申请要求于2020年11月12日在中国专利局提交的、申请号为202011262086.7、发明名称为“叶轮、排水泵及空调室内机”的中国专利申请的优先权，以及要求于2020年11月12日在中国专利局提交的、申请号为202022619235.2、发明名称为“叶轮、排水泵及空调室内机”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及制冷设备技术领域，特别涉及一种叶轮、排水泵及空调室内机。
 背景技术
空调室内机在进行制冷作业时，空气中的水分遇冷会在热交换器的表面凝结成冷凝水，然后滴落在设于热交换器下方的冷凝水盘中。为了将积蓄在冷凝水盘中的冷凝水排掉，一般会在空调室内机的冷凝水盘处装配排水泵。此类排水泵在满足规定的流量和扬程的前提下，还需要保证将工作噪音限制在规定的范围内，以满足空调***对噪声的严格要求。
叶轮是排水泵的重要组成部分，工作时叶轮通过电机带动旋转，使叶轮中间产生真空，将水吸入叶轮，再通过高速旋转将水排出。现有的排水泵，当冷凝水盘的水位较低时，水和空气被同时吸入排水泵中，叶轮内形成半水半汽的水汽混合状态，叶轮内分布的水量不均匀，产生不平衡振动，进而使得排水泵的工作噪音较大，给用户带来了较大的困扰。随着人们对生活品质的要求日益提高，如何降低排水泵的工作噪音，成为急需解决的问题。
 技术问题
本申请实施例的目的之一在于：提供一种叶轮、排水泵及空调室内机，能够解决现有技术中排水泵工作时噪音较大的问题。
 技术解决方案
为解决上述技术问题，本申请实施例采用的技术方案是：
第一方面，提供了一种叶轮，所述叶轮包括：叶轮轴；长叶片，固定连接于所述叶轮轴上，并且沿所述叶轮轴的径向向外延伸；圆盘，包括板状结构，所述板状结构套接于所述叶轮轴的外周，所述板状结构上开设有至少一个连通所述板状结构前侧和后侧的平衡通孔。
本申请提供的叶轮通过在板状结构开设至少一个平衡通孔，这样，当水和空气一同被吸入叶轮腔内时，空气可以通过该平衡通孔排出到腔外，进而能够平衡叶轮内腔和外腔的压力差，减少了轴向力，因此减小叶轮在工作时由于压力差引起的振动，从而减小了叶轮在工作时产生的噪音。
此外，本申请的平衡通孔开设于板状结构上，长叶片的底部被固定于该板状结构上，使得长叶片的甩水方向与平衡通孔的轴线方向相互垂直，被长叶片甩出的水无法直接进入平衡通孔内，进而不会产生由于气液混合物快速穿过小孔或狭缝产生的口哨音，从而有利于进一步减小叶轮在工作时产生的噪音。
可选地，可以在叶轮轴的顶端开设连接孔，进而能够方便叶轮与电机输出轴的固定连接。
例如，叶轮轴与电机输出轴可以通过花键连接。此时，可以在连接孔内设置内花键，电机输出轴的外壁上设置外花键，电机输出轴伸入连接孔内使得内花键与外花键固定连接，进而使得电机输出轴与叶轮轴的实现传动连接。
可选地，长叶片可以设置多个，并且均匀环绕于叶轮轴的外周壁上。在本申请实施例中，长叶片被设置为个，均匀环绕于叶轮轴的外周壁上，相邻两个长叶片之间形成的夹角均为90度。此时，4个长叶片呈“十”字型结构。
可选地，长叶片也可以被设置更多个或者更少个，本申请对此不做限定。
在一种可能的设计中，所述平衡通孔设置有多个，并且均匀布设于所述板状结构的外侧边缘处。叶轮腔体内的气泡是随着水流移动的，在长叶片的作用下，临近外侧边缘处的水流速度更快，气泡更容易排出，因此，将平衡通孔设置于板状结构的外侧边缘处能够提高空气排出效率，进而有利于降低叶轮在工作时产生的噪音。
可选地，平衡通孔可以开设于相邻两个叶片之间。
在一种可能的设计中，平衡通孔可以为圆孔，并且孔径为1.0~3.0毫米，例如可以为1.5毫米、1.8毫米、2.0毫米、2.3毫米、2.5毫米、2.8毫米等。平衡通孔的孔径太大和太小均不合适，孔径太大容易降低叶轮的吸力，进而会降低排水泵的扬程和排水量。而孔径太小会使得空气排出效果（即气压平衡效果）不明显。在本申请中，可以根据水流速度设置平衡通孔的孔径，流速越大，孔径可以设置的越大，将平衡通孔设置于板状结构的外侧边缘处，孔径的选取范围可以为1.0~3.0毫米。
可选地，在其他实施方式中，平衡通孔的截面形状可以为椭圆形、矩形、三角形、菱形、梯形或者腰形等，本申请对此不作限定。
可选地，各个平衡通孔的大小、形状可以相同，也可以不同，本申请对此不做限定。
可选地，每个平衡通孔在轴向上的孔径可以相同，也可以不同，本申请对此不作限定。例如，平衡通孔在轴向上沿着朝向所述板状结构前侧的方向孔径逐渐变大，或者逐渐变小。
可选地，在其他实施方式中，多个平衡通孔也可以设置于板状结构的其他位置（例如中部），并且按照其他方式进行排布（例如可以非均匀排布），本申请对此不做限定。
在一种可能的设计中，所述圆盘还包括与所述板状结构的外侧边缘固定连接的环状结构，所述环状结构设置于所述长叶片的外周，并且与所述长叶片之间形成间隙。
环状结构包围长叶片，这使得叶轮排出的水（即被叶片甩出的水）在撞击泵壳内壁产生噪音之前先一步被环状结构阻挡降低流速，从而有利于降低叶轮在工作时产生的噪音。并且，环状结构与长叶片外端部之间形成间隙，通过以上结构上的改进，能够对水流进行进一步干预，使得更多的水要首先经过环状结构的阻挡降速，而不是直接被甩到泵壳内壁上，从而有利于进一步降低叶轮在工作时产生的噪音，使得本申请提供的叶轮降噪效果十分明显。
可选地，该间隙可以为1~2毫米。例如可以为1.2毫米、1.5毫米或者1.8毫米。
可选地，多个长叶片与环状结构之间形成的间隙的大小可以相同，也可以不同，本申请对此不做限定。
在一种可能的设计中，沿着所述叶轮轴的轴向方向，所述环状结构的高度高于所述长叶片的高度。环状结构的上端部要高于长叶片的上端部，从而能够保证叶轮具有足够的吸力，进而能够保证排水泵具有足够的排水能力。
在一种可能的设计中，所述板状结构上并且位于相邻两个所述长叶片之间设置有至少一个短叶片。
在一种可能的设计中，所述平衡通孔布置于相邻两个叶片之间，并且所述平衡通孔与所述环状结构之间形成间隙。通过以上设置，在提高空气排出效率的同时，能够保证空气不会从叶轮的侧部排出，有利于降低叶轮在工作时产生的噪音，能够提高用户的使用体验。
在一种可能的设计中，所述短叶片的外端部与所述环状结构之间形成间隙。
可选地，多个短叶片与环状结构之间形成的间隙的大小可以相同，也可以不同，本申请对此不做限定。
可选地，短叶片、长叶片分别与环状结构之间形成的间隙的大小可以相同，也可以不同，本申请对此不做限定。
例如，相邻两个所述长叶片之间可以设置多个短叶片，该多个短叶片呈板状，长度可以相同，也可以不同。
可选地，短叶片与长叶片的高度相同。
可选地，短叶片的顶端也可以高于或者低于长叶片的顶端。
在一种可能的设计中，在朝向所述长叶片的方向上，所述板状结构自中心向外侧方向逐渐倾斜提高。通过以上设置，使得所述板状结构整体形成“漏斗”状结构，能够对水流起到更好的推送引导作用，避免了水流提升后回落，并且水流提升平稳，有利于降低噪音。
在一种可能的设计中，所述板状结构与所述长叶片的底部固定连接。
在一种可能的设计中，所述叶轮轴背向所述长叶片的端部还设置有引流叶片，所述引流叶片与所述长叶片一一对应连接，所述长叶片在所述叶轮轴的径向方向上的长度大于所述引流叶片的长度。
可选地，所述引流叶片与所述长叶片的数量相同，可以均为4个，整体呈“十”字形结构。
使用过程中，引流叶片随排水泵的吸水口一同浸入水中，引流叶片对水的搅动将水提升吸入叶轮的内腔中。为了提高引流效果，引流叶片在沿着水流方向上的宽度可以逐渐变大，并且整体平滑过渡。
在一种可能的设计中，所述叶轮通过注塑工艺一体成型制成。进而有利于提高叶轮的整体机械强度。
可选地，叶轮也可以通过其他一体成型制成。例如，叶轮可以为金属件，此时可以通过锻造等工艺形成一体结构。
第二方面，提供了一种排水泵，包括泵壳、电机以及前述第一方面中任一种可能设计中提供的叶轮，所述叶轮可活动的容纳于所述泵壳内，所述电机的输出轴与所述叶轮轴固定连接。
在一种可能的设计中，泵壳上分别开设有吸水口和排水口，电机带动叶轮进行旋转，在离心力的作用下，将水通过吸入口吸入泵壳内，之后通过排水口排出。
在一种可能的设计中，排水泵还包括电源线，电源线与电机相连接，以向电机进行供电。
可选地，电机可以为单相永磁同步电机。此时，电机可以包括定子、转子和电机输出轴。
排水泵运行过程中，定子驱动转子转动，并通过电机输出轴、叶轮轴带动叶轮转动，通过吸水口将水吸入泵壳内，最后由排水口排出。由于本申请对叶轮的结构进行优化，平衡了叶轮的内外压力差，减小了叶轮运行时的振动，从而能够降低叶轮在工作时产生的噪音。
可选地，泵壳可以由塑料材质构成，从而有利于减轻排水泵的整体重量。
可选地，泵壳可以包括上泵壳和下泵壳，上泵壳和下泵壳可以通过螺钉、卡扣等形成可拆卸的连接为一个整体结构，进而限定出该排水泵的容纳腔，叶轮被容纳于该容纳腔内。
进一步地，电机也被设置于该容纳腔内。
可选地，在其他实施方式中，电机也可以被设置于该容纳腔外部，电机输出轴从泵壳外侧伸入该容纳腔内并且与叶轮轴固定连接。
由于排水泵采用了上述实施例提供的叶轮，因此使得排水泵也具有与前述叶轮相应的技术效果，在此不再赘述。
第三方面，提供了一种空调室内机，包括冷凝水盘以及前述第二方面中所提供的排水泵，所述排水泵的吸水口与所述冷凝水盘相连通，进而使得排水泵能够将冷凝水泵集聚的冷凝水排出。
由于空调室内机采用了上述实施例提供的叶轮，因此使得空调室内机也具有与前述叶轮相应的技术效果，在此不再赘述。
 有益效果
本申请实施例提供的叶轮、排水泵及空调室内机的有益效果在于：本申请提供的叶轮通过在板状结构开设至少一个平衡通孔，这样，当水和空气一同被吸入叶轮腔内时，空气可以通过该平衡通孔排出到腔外，进而能够平衡叶轮内腔和外腔的压力差，减少了轴向力，因此减小叶轮在工作时由于压力差引起的振动，从而减小了叶轮在工作时产生的噪音。
此外，本申请的平衡通孔开设于板状结构上，长叶片的底部被固定于该板状结构上，使得长叶片的甩水方向与平衡通孔的轴线方向相互垂直，被长叶片甩出的水无法直接进入平衡通孔内，进而不会产生由于气液混合物快速穿过小孔或狭缝产生的口哨音，从而有利于进一步减小叶轮在工作时产生的噪音。
由于排水泵采用了上述实施例提供的叶轮，因此使得排水泵也具有与前述叶轮相应的技术效果，在此不再赘述。
由于空调室内机采用了上述实施例提供的叶轮，因此使得空调室内机也具有与前述叶轮相应的技术效果，在此不再赘述。
 附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例或示范性技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图。
图1是本申请实施例提供的叶轮的一个视角的整体结构示意图；
图2是本申请实施例提供的叶轮的另一个视角的整体结构示意图；
图3是本申请实施例提供的叶轮的俯视图；
图4是本申请实施例提供的叶轮的部分剖视图；
图5是本申请实施例提供的排水泵的整体结构示意图；
图6是本申请实施例提供的空调室内机的结构示意图。
附图标记：10、叶轮；11、叶轮轴；111、连接孔；12、长叶片；13、圆盘；131、板状结构；132、环状结构；14、短叶片；15、引流叶片；16、平衡通孔；17、进水通孔；20、泵壳；30、电机； 40、吸水口；50、排水口；60、电源线；100、排水泵；200、冷凝水盘；1000、空调室内机。
 本发明的实施方式
下面将结合附图，对本申请中的技术方案进行描述。显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“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，或一体地连接；可以是机械连接，也可以是电连接或可以相互通讯；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或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
在本申请的描述中，需要理解的是，术语“上”、“下”、“侧”、“内”、“外”、“顶”、“底”等指示的方位或位置关系为基于安装的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的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申请的限制。
还需说明的是，本申请实施例中以同一附图标记表示同一组成部分或同一零部件，对于本申请实施例中相同的零部件，图中可能仅以其中一个零件或部件为例标注了附图标记，应理解的是，对于其他相同的零件或部件，附图标记同样适用。
第一方面，本申请实施例首先提供一种叶轮10，该叶轮10能够被应用于排水泵中。图1是本申请实施例提供的叶轮10的一个视角的整体结构示意图。图2是本申请实施例提供的叶轮10的另一个视角的整体结构示意图。图3是本申请实施例提供的叶轮10的俯视图。图4是本申请实施例提供的叶轮10的部分剖视图。
如图1-4所示，本申请实施例提供的叶轮10包括：叶轮轴11、长叶片12以及圆盘13。
其中，叶轮轴11用于与排水泵的电机输出轴固定连接，由电机通过叶轮轴11驱动整个叶轮10进行旋转，进而能够将水吸入排水泵内。
可选地，如图1所示，可以在叶轮轴11的顶端开设连接孔111，进而能够方便叶轮10与电机输出轴的固定连接。
例如，叶轮轴11与电机输出轴可以通过花键连接。此时，可以在连接孔111内设置内花键，电机输出轴的外壁上设置外花键，电机输出轴伸入连接孔111内使得内花键与外花键固定连接，进而使得电机输出轴与叶轮轴11的实现传动连接。
可选地，在其他实施方式中，电机输出轴也可以通过其他方式与叶轮轴11传动连接，并且电机输出轴与叶轮轴11可以直接连接，也可以通过中间媒介间接连接，本申请对此不做限定。
长叶片12呈板状，一端被固定连接于叶轮轴11上，另一端自叶轮轴11向放射方向延伸。即，长叶片12沿叶轮轴11的径向向外延伸，长叶片12以叶轮轴11的轴线为中心，呈放射状设置。在叶轮轴11的带动下，长叶片12进行旋转，以产生吸力，从而能够将水吸入排水泵的内腔，以及进一步将水从叶轮10的内腔中甩出。
长叶片12可以设置多个，并且均匀环绕于叶轮轴11的外周壁上，相邻两个长叶片12之间形成的夹角可以相同。如图1、3所示，在本申请实施例中，长叶片12被设置为4个，均匀环绕于叶轮轴11的外周壁上，相邻两个长叶片12之间形成的夹角均为90度。此时，4个长叶片12呈“十”字型结构。
在其他实施例中，长叶片12也可以被设置更多个或者更少个，本申请对此不做限定。例如，长叶片12可以被设置为3个、5个或者6个。此时将该多个长叶片12均匀环绕于叶轮轴11的外周壁上，相邻两个长叶片12之间形成的夹角将为120度、72度或者60度。
圆盘13被套接于叶轮轴11的外周，圆盘13包括板状结构131，板状结构131与长叶片12的底部固定连接。长叶片12可以垂直设置于板状结构131之上，板状结构131能够对长叶片12提供支撑力，从而能够提高叶轮的机械强度。
板状结构131套接于叶轮轴11的外周，板状结构131和长叶片12沿叶轮轴的轴线方向依次设置，各长叶片12均与板状结构131固定连接。
板状结构131上开设有至少一个连通圆盘13内侧和外侧的平衡通孔16。例如，该平衡通孔16可以仅设置一个，也可以设置多个，例如2个、3个、6个、8个或者更多个等。
平衡通孔16能够连通板状结构131的前侧和后侧，换句话说，平衡通孔16能够连通叶轮10的内侧和外侧，进而使得叶轮10的内侧和外侧的气压能够趋于平衡。
本申请实施例提供的叶轮10，通过在板状结构131开设至少一个平衡通孔16，这样，当水和空气一同被吸入叶轮腔内时（例如从下文中即将介绍的进水通孔17中吸入），空气可以通过该平衡通孔16排出到腔外，进而能够平衡叶轮10内腔和外腔的压力差，减少了轴向力，因此减小叶轮10在工作时由于压力差引起的振动，从而进一步减小叶轮10在工作时产生的噪音。
此外，本申请的平衡通孔16开设于板状结构131，长叶片12的底部被固定于该板状结构131上，使得长叶片12的甩水方向与平衡通孔16的轴线方向相互垂直，被长叶片12甩出的水无法直接进入平衡通孔16内，进而不会产生由于气液混合物快速穿过小孔或狭缝产生的口哨音，从而有利于进一步减小叶轮10在工作时产生的噪音。
可选地，平衡通孔16被布置于长叶片12之间。也就是说，平衡通孔16的开设位置应当避开长叶片12，不与长叶片12相交或者贯穿，从而能够提高空气排出效率，有利于降低叶轮10在工作时产生的噪音，能够提高用户的使用体验。
可选地，平衡通孔16设置有多个，并且均匀布设于板状结构131的外侧边缘处。叶轮10腔体内的气泡是随着水流移动的，在长叶片12的作用下，临近外侧边缘处的水流速度更快，气泡更容易排出，因此，将平衡通孔16设置于板状结构131的外侧边缘处能够提高空气排出效率，进而有利于降低叶轮10在工作时产生的噪音。
进一步地，如图2-4所示，平衡通孔16可以为圆孔，并且孔径为1.0~3.0毫米，例如可以为1.5毫米、1.8毫米、2.0毫米、2.3毫米、2.5毫米或者2.8毫米等。平衡通孔16的孔径太大和太小均不合适，孔径太大容易降低叶轮10的吸力，进而会降低排水泵的扬程和排水量。而孔径太小会使得空气排出效果（即气压平衡效果）不明显。在本申请实施例中，可以根据水流速度设置平衡通孔16的孔径，流速越大，孔径可以设置的越大，将平衡通孔16设置于板状结构131的外侧边缘处，孔径的选取范围可以为1.0~3.0毫米。
可选地，在其他实施方式中，平衡通孔16的截面形状可以为椭圆形、矩形、三角形、菱形、梯形或者腰形等，本申请对此不作限定。
可选地，各个平衡通孔16的大小、形状可以相同，也可以不同，本申请对此不做限定。
可选地，每个平衡通孔16在轴向上的孔径可以相同，也可以不同，本申请对此不作限定。例如，平衡通孔16在轴向上沿着朝向所述板状结构前侧的方向孔径逐渐变大，或者逐渐变小。
可选地，在其他实施方式中，多个平衡通孔16也可以设置于板状结构131的其他位置（例如中部），并且按照其他方式进行排布（例如非均匀排布），本申请对此不做限定。
如图1-4所示，在本申请实施例中，圆盘13还包括与板状结构131的外侧边缘固定连接的环状结构132，环状结构132设置于长叶片12的外周，并且与长叶片12外端部之间形成间隙S。
环状结构132包围长叶片12，这使得叶轮10排出的水（即被叶片甩出的水）在撞击泵壳内壁产生噪音之前先一步被环状结构132阻挡降低流速，从而有利于降低叶轮10在工作时产生的噪音。并且，环状结构132与长叶片12外端部之间形成间隙S，通过以上结构上的改进，能够对水流进行进一步干预，使得更多的水要首先经过环状结构132的阻挡降速，而不是直接被甩到泵壳内壁上，从而有利于进一步降低叶轮10在工作时产生的噪音，使得本申请提供的叶轮10降噪效果十分明显。
可选地，该间隙S可以为1~2毫米。例如可以为1.2毫米、1.5毫米或者1.8毫米。
可选地，多个长叶片12与环状结构132之间形成的间隙的大小可以相同，也可以不同，本申请对此不做限定。
如图4所示，在本申请实施例中，沿着叶轮轴11的轴向方向，环状结构132的上端部要高于长叶片12的上端部，从而能够保证叶轮10具有足够的吸力，进而能够保证排水泵具有足够的排水能力。
如图1、3所示，板状结构131上并且位于相邻两个长叶片12之间设置有至少一个短叶片14，短叶片14的外端部（即远离叶轮轴14的端部）与环状结构132之间形成间隙。
短叶片14的长度要小于长叶片12，短叶片14呈放射状设置，沿着叶轮轴11的径向方向向外延伸，并且底部与板状结构131固定连接，短叶片14可以垂直于板状结构131。类似于长叶片12，短叶片14的外端部与环状结构132之间也形成间隙，从而能够进一步降低叶轮10在工作时产生的噪音。
在本申请实施例中，相邻两个长叶片12之间设置有3个短叶片14，各个短叶片14的长度可以相同，也可以不同，本申请对此不做限定。
可选地，多个短叶片14与环状结构132之间形成的间隙的大小可以相同，也可以不同，本申请对此不做限定。
可选地，短叶片14、长叶片12分别与环状结构132之间形成的间隙的大小可以相同，也可以不同，本申请对此不做限定。
在其他实施例中，相邻两个长叶片12之间可以设置更多或者更少个短叶片14，例如可以设置1个、2个、4个短叶片14，本申请对此不做限定。
在本申请实施例中，平衡通孔16可以开设于相邻两个叶片之间。例如开设于相邻的长叶片12和短叶片14之间，以及开设于相邻的两个短叶片14之间。
此时，平衡通孔16的开设位置应当避开长叶片12、短叶片14以及环状结构132，不与长叶片12、短叶片14以及环状结构132相交或者贯穿，即平衡通孔16的孔壁与环状结构132的内壁之间形成间隙，在提高空气排出效率的同时，能够保证空气不会从叶轮10的侧部排出，有利于降低叶轮10在工作时产生的噪音，能够提高用户的使用体验。
类似地，在本申请实施例中，环状结构132的上端部高于短叶片14的上端部，从而能够保证叶轮10具有足够的吸力，进而能够保证排水泵具有足够的排水能力。
可选地，短叶片14与长叶片12的高度相同。
可选地，短叶片14的顶端也可以高于或者低于长叶片12的顶端。
如图2、3所示，板状结构131中部开设有进水通孔17，叶轮轴11穿设于进水通孔17内，所述进水通孔17的孔径大于叶轮轴11的轴径。
进水通孔17的孔径大于叶轮轴11的轴径，使得水流可以从进水通孔17的孔壁与叶轮轴11的外侧壁之间形成的间隙通过并且进入到叶轮10的内腔中。
如图1、2、4所示，叶轮轴11的底部还固定连接有引流叶片15，引流叶片15与长叶片12同向对应连接，长叶片12在放射方向上长度大于引流叶片15。
也就是说，叶轮轴11背向长叶片12的端部还设置有若干个引流叶片15，各引流叶片15沿叶轮轴11的圆周方向间隔设置，各引流叶片15与各长叶片12一一对应连接。
使用过程中，引流叶片15随排水泵的吸水口一同浸入水中，引流叶片15对水的搅动将水提升吸入叶轮10的内腔中。为了提高引流效果，引流叶片15在沿着水流方向上的宽度可以逐渐变大，并且整体平滑过渡。
在本申请实施例中，引流叶片15也相对应的设置4个，并且各自和一个长叶片12固定连接。此时，4个引流叶片15也整体呈“十”字形结构。
如图2、4所示，在本申请实施例中，在朝向长叶片12的方向上，板状结构131自中心向外侧方向逐渐倾斜提高。此时，板状结构131的整体呈平滑的圆弧斜面。也就是说，在朝向长叶片12的方向上，板状结构131自中心向外朝向叶轮轴11的轴线倾斜延伸。
通过以上设置，使得板状结构整体形成“漏斗”状结构，能够对水流起到更好的推送引导作用，避免了水流提升后回落，并且水流提升平稳，有利于降低噪音。
在本申请实施例中，为了提高叶轮10的机械强度，可以通过一体成型工艺将叶轮10形成一体结构。例如，叶轮10可以为塑料件，并且通过注塑工艺一体成型制成。
可选地，叶轮也可以通过其他一体成型制成。例如，叶轮可以为金属件，此时可以通过锻造等工艺形成一体结构。
另一方面，本申请实施例还提供了一种排水泵100。该排水泵100可以被应用于空调室内机、洗衣机、洗碗机等有排水需求的电器中，本申请对此不做限定。图5是本申请实施例提供的排水泵100的整体结构示意图。
如图5所示，本申请实施例提供的排水泵100包括前述实施例提供的叶轮10、泵壳20以及电机30。其中，
泵壳20内部形成容纳腔，叶轮10以及电机30被设置于该容纳腔内。叶轮10可活动的容纳于泵壳20内，电机30的输出轴与叶轮轴11固定连接，进而能够带动叶轮10进行旋转以产生吸力。
可选地，泵壳20可以由塑料材质构成，从而有利于减轻排水泵的整体重量。
可选地，泵壳20可以包括上泵壳和下泵壳，上泵壳和下泵壳可以通过螺钉、卡扣等形成可拆卸的连接为一个整体结构，进而限定出该容纳腔。
在本申请实施例中，电机30也被设置于该容纳腔内。
可选地，在其他实施方式中，电机30也可以被设置于该容纳腔外部，电机输出轴从泵壳外侧伸入该容纳腔内并且与叶轮轴11固定连接。
泵壳20上分别开设有吸水口40和排水口50，电机30带动叶轮10进行旋转，在离心力的作用下，将水通过吸入口40吸入泵壳20内，之后通过排水口50排出。
如图5所示，排水泵100还包括电源线60，电源线60与电机30相连接，以向电机30进行供电。
可选地，电机30可以为单相永磁同步电机。此时，电机30可以包括定子、转子和电机输出轴。
排水泵100运行过程中，定子驱动转子转动，并通过电机输出轴、叶轮轴12带动叶轮10转动，通过吸水口40将水吸入泵壳20内，最后由排水口50排出。由于本申请对叶轮10的结构进行优化，平衡了叶轮10的内外压力差，减小了叶轮10运行时的振动，从而能够降低叶轮10在工作时产生的噪音。
由于排水泵100采用了上述实施例提供的叶轮10，因此使得排水泵100也具有与前述叶轮10相应的技术效果，在此不再赘述。
再一方面，本申请实施例还提供了一种空调室内机1000。图6是本申请实施例提供的空调室内机1000的结构示意图。
如图6所示，本申请实施例提供的空调室内机1000包括前述实施例提供的排水泵100以及冷凝水盘200。其中，排水泵100的吸水口40与冷凝水盘200相连通，从而能够将冷凝水盘200集聚的冷凝水排出。
该空调室内机1000还包括蒸发器300，冷凝水盘200被设置于蒸发器300的下方，用于收集蒸发器300表面凝结滴落的冷凝水。该冷凝水盘通常也可以被称作积水盘、集水盘等。
为了提高对流换热效果，蒸发器300的一侧还对应设置有室内风机400。
可选地，室内风机400可以为EC风机。该EC风机具有节能高效、振动小、噪声低等优点。
由于空调室内机1000采用了上述实施例提供的叶轮10，因此使得空调室内机1000也具有与前述叶轮10相应的技术效果，在此不再赘述。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (14)

  1. 一种叶轮，其特征在于，包括：
    叶轮轴（11）；
    长叶片（12），固定连接于所述叶轮轴（11）上，并且沿所述叶轮轴（11）的径向向外延伸；
    圆盘（13），包括板状结构（131），所述板状结构（131）套接于所述叶轮轴（11）的外周，所述板状结构（131）上开设有至少一个连通所述板状结构（131）前侧和后侧的平衡通孔（16）。
  2. 根据权利要求1所述的叶轮，其特征在于，所述平衡通孔（16）设置有多个，并且均匀布设于所述板状结构（131）的外侧边缘处。
  3. 根据权利要求2所述的叶轮，其特征在于，所述圆盘（13）还包括与所述板状结构（131）的外侧边缘固定连接的环状结构（132），所述环状结构（132）设置于所述长叶片（12）的外周，并且与所述长叶片（12）之间形成间隙。
  4. 根据权利要求3所述的叶轮，其特征在于，所述板状结构（131）上并且位于相邻两个所述长叶片（12）之间设置有至少一个短叶片（14）。
  5. 根据权利要求4所述的叶轮，其特征在于，所述平衡通孔（16）布置于相邻两个叶片之间，并且所述平衡通孔（16）与所述环状结构（132）之间形成间隙。
  6. 根据权利要求4所述的叶轮，其特征在于，所述短叶片（14）的外端部与所述环状结构（132）之间形成间隙。
  7. 根据权利要求3-6中任一项所述的叶轮，其特征在于，沿着所述叶轮轴（11）的轴向方向，所述环状结构（132）的高度高于所述长叶片（12）的高度。
  8. 根据权利要求1-6中任一项所述的叶轮，其特征在于，在朝向所述长叶片（12）的方向上，所述板状结构（131）自中心向外侧方向逐渐倾斜提高。
  9. 根据权利要求1-6中任一项所述的叶轮，其特征在于，所述板状结构（131）与所述长叶片（12）的底部固定连接。
  10. 根据权利要求1-6中任一项所述的叶轮，其特征在于，所述叶轮轴（11）背向所述长叶片（12）的端部还设置有引流叶片（15），所述引流叶片（15）与所述长叶片（12）一一对应连接，所述长叶片（12）在所述叶轮轴（11）的径向方向上的长度大于所述引流叶片（15）的长度。
  11. 根据权利要求1-6中任一项所述的叶轮，其特征在于，所述叶轮通过注塑工艺一体成型制成。
  12. 根据权利要求1-6中任一项所述的叶轮，其特征在于，所述平衡通孔（16）为圆孔，并且孔径为1.0~3.0毫米。
  13. 一种排水泵，其特征在于，包括泵壳（20）、电机（30）以及如权利要求1-12中任一项所述的叶轮，所述叶轮可活动的容纳于所述泵壳（20）内，所述电机（30）的输出轴与所述叶轮轴（11）固定连接。
  14. 一种空调室内机，其特征在于，包括冷凝水盘（200）以及如权利要求13所述的排水泵，所述排水泵的吸水口（40）与所述冷凝水盘（200）相连通。
PCT/CN2020/136024 2020-11-12 2020-12-14 叶轮、排水泵及空调室内机 WO2022099845A1 (zh)

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