CN116717501A

CN116717501A - Impeller, drainage pump and air conditioner indoor unit

Info

Publication number: CN116717501A
Application number: CN202310868069.5A
Authority: CN
Inventors: 顾文海; 高振刚
Original assignee: Welling Wuhu Motor Manufacturing Co Ltd
Current assignee: Welling Wuhu Motor Manufacturing Co Ltd
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2023-09-08
Also published as: CN114483639A; CN116717502A

Abstract

The application discloses an impeller, a drainage pump and an air conditioner indoor unit. The impeller comprises: an impeller shaft; the disc comprises a plate-shaped structure and an annular structure, the plate-shaped structure is sleeved on the periphery of the impeller shaft, the annular structure is fixedly connected with the outer side edge of the plate-shaped structure, the plate-shaped structure is provided with at least one balance through hole which is communicated with the inner side and the outer side of the disc, and the balance through hole is arranged adjacent to the outer side edge of the plate-shaped structure; the long blade is fixedly connected to the impeller shaft, the long blade extends outwards along the radial direction of the impeller shaft, a gap is formed between the outer end portion of the long blade and the annular structure, the balance through holes are arranged at intervals with the long blade in the circumferential direction of the disc, and the balance through holes extend inwards to exceed the outer end portion of the long blade in the radial direction of the long blade. The application can reduce the noise generated by the impeller during working.

Description

Impeller, drainage pump and air conditioner indoor unit

The application has the application number as follows: CN202011262086.7, 20201112, impeller, drain pump and indoor unit of air conditioner

Technical Field

The application relates to the technical field of refrigeration equipment, in particular to an impeller, a drainage pump and an air conditioner indoor unit.

Background

When the indoor unit of the air conditioner performs refrigeration operation, moisture in the air can condense into condensed water on the surface of the heat exchanger when encountering cold, and then the condensed water drops into a condensed water tray arranged below the heat exchanger. In order to drain condensed water stored in the condensate water tray, a drain pump is generally installed at the condensate water tray of the indoor unit of the air conditioner. On the premise of meeting the specified flow and lift, the drainage pump also needs to ensure that the working noise is limited in a specified range so as to meet the strict requirements of an air conditioning system on the noise.

The impeller is an important component of the drainage pump, and the impeller is driven to rotate by the motor during operation, so that vacuum is generated in the middle of the impeller, water is sucked into the impeller, and the water is discharged through high-speed rotation. When the water level of the condensate water tray is lower, water and air are sucked into the drain pump simultaneously, a water-vapor mixing state of half water and half vapor is formed in the impeller, water distributed in the impeller is uneven, unbalanced vibration is generated, and further working noise of the drain pump is larger, and larger trouble is brought to users. With the increasing demands of people on life quality, how to reduce the working noise of a drain pump becomes a problem to be solved urgently.

Disclosure of Invention

The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides the impeller which can solve the problem of loud noise during the operation of the drainage pump in the prior art.

The application also provides a drainage pump with the impeller.

The application also provides an air conditioner indoor unit with the drainage pump.

An impeller according to an embodiment of the present application includes: an impeller shaft; the disc comprises a plate-shaped structure and an annular structure, the plate-shaped structure is sleeved on the periphery of the impeller shaft, the annular structure is fixedly connected with the outer side edge of the plate-shaped structure, the plate-shaped structure is provided with at least one balance through hole which is communicated with the inner side and the outer side of the disc, and the balance through hole is arranged adjacent to the outer side edge of the plate-shaped structure; the long blade is fixedly connected to the impeller shaft, the long blade extends outwards along the radial direction of the impeller shaft, a gap is formed between the outer end portion of the long blade and the annular structure, the balance through holes are arranged at intervals with the long blade in the circumferential direction of the disc, and the balance through holes extend inwards to exceed the outer end portion of the long blade in the radial direction of the long blade.

According to the impeller provided by the application, at least one balance through hole is formed in the plate-shaped 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, so that the pressure difference between the inner cavity and the outer cavity of the impeller can be balanced, the axial force is reduced, and the vibration of the impeller caused by the pressure difference during working is reduced, and the noise generated by the impeller during working is reduced.

In addition, the balance through hole is formed in the plate-shaped structure, the bottoms of the long blades are fixed on the plate-shaped structure, so that the water throwing direction of the long blades is perpendicular to the axis direction of the balance through hole, water thrown out by the long blades cannot directly enter the balance through hole, whistle generated by the fact that gas-liquid mixture rapidly passes through small holes or slits cannot be generated, and noise generated by the impeller during working is further reduced.

According to some embodiments of the application, the long blades are multiple and the balance through holes are multiple, and multiple balance through holes are arranged between adjacent long blades.

According to some embodiments of the application, at least one short vane is arranged on the plate-like structure and between two adjacent long vanes, the outer ends of the short vanes forming a gap with the ring-like structure.

According to some embodiments of the application, the gap between the short blades and the annular structure is of a different size than the gap between the long blades and the annular structure.

According to some embodiments of the application, the balancing through holes and the short blades are spaced apart in the circumferential direction of the disc.

According to some embodiments of the application, the balancing through hole extends inwardly beyond the outer end of the short blade in the radial direction of the long blade.

According to some embodiments of the application, the balance through hole is formed as a circular hole.

According to some embodiments of the application, the balancing through holes are a plurality of, and the diameters of the balancing through holes are the same.

According to some embodiments of the application, the impeller is integrally formed by an injection molding process.

According to an embodiment of the present application, a drain pump includes: a pump housing and a motor; the impeller is the impeller according to the above embodiment of the present application, the impeller is movably accommodated in the pump casing, and the output end of the motor is fixedly connected with the impeller shaft.

Because the impeller provided by the above embodiment is adopted in the drainage pump, the drainage pump also has the technical effects corresponding to the impeller, and the description thereof is omitted.

The indoor unit of the air conditioner comprises a condensate water disc and the drainage pump according to the embodiment of the application, wherein a water suction port of the drainage pump is communicated with the condensate water disc.

The impeller provided by the embodiment is adopted by the indoor unit of the air conditioner, so that the indoor unit of the air conditioner has the technical effects corresponding to the impeller, and the description is omitted.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

The foregoing and/or additional aspects and advantages of the application will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic view of the overall structure of an impeller according to an embodiment of the present application;

FIG. 2 is a schematic view of the overall structure of an impeller according to another aspect of the present application;

FIG. 3 is a top view of an impeller provided by an embodiment of the present application;

FIG. 4 is a partial cross-sectional view of an impeller provided by an embodiment of the present application;

FIG. 5 is a schematic view of the overall structure of a drain pump according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of an indoor unit of an air conditioner according to an embodiment of the present application.

Reference numerals: 10. an impeller; 11. an impeller shaft; 111. a connection hole; 12. a long blade; 13. a disc; 131. a plate-like structure; 132. a ring structure; 14. short leaves; 15. drainage blades; 16. balance through holes; 17. a water inlet through hole; 20. a pump housing; 30. a motor; 40. a water suction port; 50. a water outlet; 60. a power line; 100. a draining pump; 200. a condensate water tray; 1000. an air conditioner indoor unit.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

It should be further noted that, in the embodiments of the present application, the same reference numerals denote the same components or the same parts, and for the same parts in the embodiments of the present application, reference numerals may be given to only one of the parts or the parts in the drawings, and it should be understood that, for other same parts or parts, the reference numerals are equally applicable.

In a first aspect, embodiments of the present application first provide an impeller 10, which impeller 10 can be used in a drain pump. Fig. 1 is a schematic view of the overall structure of an impeller 10 according to an embodiment of the present application. Fig. 2 is a schematic view of the overall structure of another view of the impeller 10 according to the embodiment of the present application. Fig. 3 is a top view of an impeller 10 provided in an embodiment of the present application. Fig. 4 is a partial cross-sectional view of an impeller 10 provided in an embodiment of the present application.

As shown in fig. 1 to 4, an impeller 10 according to an embodiment of the present application includes: impeller shaft 11, long blades 12 and disk 13.

The impeller shaft 11 is fixedly connected with a motor output shaft of the drain pump, and the motor drives the whole impeller 10 to rotate through the impeller shaft 11, so that water can be sucked into the drain pump.

Alternatively, as shown in fig. 1, a connecting hole 111 may be formed at the top end of the impeller shaft 11, so as to facilitate the fixed connection between the impeller 10 and the output shaft of the motor.

For example, the impeller shaft 11 and the motor output shaft may be connected by a spline. At this time, an internal spline may be disposed in the connection hole 111, an external spline is disposed on an outer wall of the motor output shaft, and the motor output shaft stretches into the connection hole 111 to fixedly connect the internal spline and the external spline, so that the motor output shaft is in transmission connection with the impeller shaft 11.

Alternatively, in other embodiments, the motor output shaft may be in driving connection with the impeller shaft 11 in other manners, and the motor output shaft may be directly connected to the impeller shaft 11 or indirectly connected through an intermediate medium, which is not limited in the present application.

The long blade 12 has a plate shape, one end of which is fixedly connected to the impeller shaft 11, and the other end of which extends radially from the impeller shaft 11. That is, the long blades 12 extend outward in the radial direction of the impeller shaft 11, and the long blades 12 are radially provided around the axis of the impeller shaft 11. The long blades 12 are rotated by the impeller shaft 11 to generate suction force, thereby sucking water into the inner cavity of the drain pump and further throwing water out of the inner cavity of the impeller 10.

The long blades 12 may be provided in plurality and uniformly 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 fig. 1 and 3, in the embodiment of the present application, the number of the long blades 12 is 4, and the long blades 12 uniformly surround 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 4 long blades 12 have a cross-shaped structure.

In other embodiments, more or fewer long blades 12 may be provided, as the application is not limited in this regard. For example, the long blades 12 may be provided in 3, 5, or 6. At this time, the plurality of long blades 12 are uniformly wound around the outer peripheral wall of the impeller shaft 11, and the included angle formed between two adjacent long blades 12 is 120 degrees, 72 degrees or 60 degrees.

The disc 13 is sleeved on the periphery of the impeller shaft 11, and the disc 13 comprises a plate-shaped structure 131, wherein the plate-shaped structure 131 is fixedly connected with the bottom of the long blade 12. The long blades 12 may be vertically disposed above 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-shaped structure 131 is sleeved on the periphery of the impeller shaft 11, the plate-shaped structure 131 and the long blades 12 are sequentially arranged along the axis direction of the impeller shaft, and each long blade 12 is fixedly connected with the plate-shaped structure 131.

The plate-like structure 131 is provided with at least one balance through hole 16 communicating the inside and the outside of the disk 13. For example, only one or a plurality of the balance through holes 16 may be provided, for example, 2, 3, 6, 8, or more.

The balance through hole 16 can communicate the front side and the rear side of the plate-like structure 131, in other words, the balance through hole 16 can communicate the inside and the outside of the impeller 10, thereby enabling the air pressure of the inside and the outside of the impeller 10 to be balanced.

According to the impeller 10 provided by the embodiment of the application, at least one balancing through hole 16 is formed in the plate-shaped structure 131, so that when water and air are sucked into the impeller cavity together (for example, the water is sucked from the water inlet through hole 17 which will be described later), the air can be discharged out of the cavity through the balancing through hole 16, and further the pressure difference between the inner cavity and the outer cavity of the impeller 10 can be balanced, the axial force is reduced, and therefore vibration caused by the pressure difference when the impeller 10 works is reduced, and noise generated when the impeller 10 works is further reduced.

In addition, the balance through hole 16 is arranged on the plate-shaped structure 131, the bottom of the long blade 12 is fixed on the plate-shaped structure 131, so that the water throwing direction of the long blade 12 is mutually perpendicular to the axis direction of the balance through hole 16, and the water thrown out by the long blade 12 cannot directly enter the balance through hole 16, thereby generating no whistle sound generated by the fact that the gas-liquid mixture rapidly passes through small holes or slits, and further reducing the noise generated by the impeller 10 during working.

Optionally, balancing through holes 16 are arranged between the long blades 12. That is, the balancing through hole 16 should be opened at a position avoiding the long blade 12 and not intersecting or penetrating the long blade 12, so that the air discharging efficiency can be improved, the noise generated during the operation of the impeller 10 can be reduced, and the use experience of the user can be improved.

Alternatively, the balance through holes 16 are provided in plurality and uniformly distributed at the outer side edge of the plate-like structure 131. The bubbles in the cavity of the impeller 10 move along with the water flow, and under the action of the long blades 12, the water flow speed close to the outer edge is faster, and the bubbles are easier to discharge, so that the air discharge efficiency can be improved by arranging the balance through holes 16 at the outer edge of the plate-shaped structure 131, and the noise generated by the impeller 10 during working can be reduced.

Further, as shown in fig. 2-4, the balance through hole 16 may be a circular hole, and the aperture may be 1.0-3.0 mm, for example, 1.5 mm, 1.8 mm, 2.0 mm, 2.3 mm, 2.5 mm, 2.8 mm, or the like. The aperture of the balance through hole 16 is too large and too small, and the aperture is too large to easily reduce the suction force of the impeller 10, thereby reducing the lift and displacement of the drain pump. And too small a pore size may make the air discharge effect (i.e., the air pressure balancing effect) insignificant. In the embodiment of the present application, the aperture of the balance through hole 16 may be set according to the water flow speed, the larger the aperture may be set, the balance through hole 16 is set at the outer edge of the plate-shaped structure 131, and the aperture may be selected in a range of 1.0 to 3.0 mm.

Alternatively, in other embodiments, the cross-sectional shape of the balance through hole 16 may be elliptical, rectangular, triangular, diamond-shaped, trapezoidal, kidney-shaped, or the like, which is not limited by the present application.

Alternatively, the sizes and shapes of the balancing through holes 16 may be the same or different, which is not limited in the present application.

Alternatively, the aperture of each balance through hole 16 in the axial direction may be the same or may be different, which is not limited by the present application. For example, the balance through hole 16 gradually becomes larger in diameter or gradually becomes smaller in diameter in the axial direction toward the front side of the plate-like structure.

Alternatively, in other embodiments, the plurality of balance vias 16 may be disposed at other locations (e.g., the middle) of the plate-like structure 131 and arranged in other manners (e.g., non-uniform arrangement), which is not limited in the present application.

As shown in fig. 1 to 4, in the embodiment of the present application, the disc 13 further includes an annular structure 132 fixedly connected to the outer edge of the plate-shaped structure 131, and the annular structure 132 is disposed at the outer circumference of the long blade 12 and forms a gap S with the outer end of the long blade 12.

The annular structure 132 surrounds the long blades 12, which allows the water discharged from the impeller 10 (i.e., the water thrown by the blades) to be blocked by the annular structure 132 to reduce the flow rate before striking the inner wall of the pump casing to generate noise, thereby facilitating the reduction of noise generated by the impeller 10 during operation. Moreover, a gap S is formed between the annular structure 132 and the outer end part of the long blade 12, and through the improvement on the structure, water flow can be further interfered, so that more water is firstly blocked by the annular structure 132 to reduce speed, but is not directly thrown onto the inner wall of the pump shell, thereby being beneficial to further reducing noise generated by the impeller 10 during working, and the noise reduction effect of the impeller 10 provided by the application is very obvious.

Alternatively, the gap S may be 1 to 2 mm. For example, it may be 1.2 mm, 1.5 mm or 1.8 mm.

Alternatively, the gaps formed between the plurality of long blades 12 and the annular structure 132 may be the same or different in size, which is not limited by the present application.

As shown in fig. 4, in the embodiment of the present application, the upper end portion of the ring structure 132 is higher than the upper end portion of the long vane 12 along the axial direction of the impeller shaft 11, so that it is possible to ensure that the impeller 10 has a sufficient suction force and thus a sufficient drainage capacity of the drain pump.

As shown in fig. 1 and 3, at least one short vane 14 is provided on the plate-like structure 131 and between adjacent two long vanes 12, and a gap is formed between the outer end of the short vane 14 (i.e., the end remote from the impeller shaft 14) and the annular structure 132.

The short blades 14 are shorter than the long blades 12, the short blades 14 are radially arranged to extend outwardly in the radial direction of the impeller shaft 11, and the bottom is fixedly connected to the plate-like structure 131, and the short blades 14 may 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 noise generated by the impeller 10 during operation can be further reduced.

In the embodiment of the present application, 3 short blades 14 are disposed between two adjacent long blades 12, and the lengths of the short blades 14 may be the same or different, which is not limited in the present application.

Alternatively, the gaps formed between the plurality of short blades 14 and the annular structure 132 may be the same or different in size, which is not limited by the present application.

Alternatively, the gaps formed between the short vane 14 and the long vane 12 and the annular structure 132 may be the same or different, which is not limited by the present application.

In other embodiments, more or fewer short blades 14 may be disposed between two adjacent long blades 12, for example, 1, 2, 4 short blades 14 may be disposed, as the application is not limited in this regard.

In an embodiment of the present application, the balancing through hole 16 may be opened between two adjacent blades. For example between adjacent long blades 12 and short blades 14, and between adjacent short blades 14.

At this time, the opening position of the balancing through hole 16 should avoid the long blade 12, the short blade 14 and the annular structure 132, and does not intersect or penetrate the long blade 12, the short blade 14 and the annular structure 132, that is, a gap is formed between the hole wall of the balancing through hole 16 and the inner wall of the annular structure 132, so that the air discharge efficiency is improved, and meanwhile, air can be ensured not to be discharged from the side part of the impeller 10, which is favorable for reducing noise generated by the impeller 10 during working, and the use experience of a user can be improved.

Similarly, in the embodiment of the present application, the upper end portion of the ring structure 132 is higher than the upper end portion of the short vane 14, so that it is possible to secure sufficient suction force of the impeller 10 and thus sufficient drainage capacity of the drain pump.

Alternatively, the short blades 14 are the same height as the long blades 12.

Alternatively, the tips of the short blades 14 may be higher or lower than the tips of the long blades 12.

As shown in fig. 2 and 3, the middle part of the plate-shaped structure 131 is provided with a water inlet through hole 17, the impeller shaft 11 is penetrated into the water inlet through hole 17, and the aperture of the water inlet through hole 17 is larger than the shaft diameter of the impeller shaft 11.

The bore diameter of the water inlet through hole 17 is larger than the shaft diameter of the impeller shaft 11 so that water flow can pass through a gap formed between the wall of the water inlet through hole 17 and the outer side wall of the impeller shaft 11 and enter the inner cavity of the impeller 10.

As shown in fig. 1, 2 and 4, the bottom of the impeller shaft 11 is fixedly connected with a drainage blade 15, the drainage blade 15 is connected with a long blade 12 in the same direction correspondingly, and the length of the long blade 12 in the radial direction is greater than that of the drainage blade 15.

That is, the end of the impeller shaft 11 facing away from the long blades 12 is further provided with a plurality of drainage blades 15, each drainage blade 15 is disposed at intervals along the circumferential direction of the impeller shaft 11, and each drainage blade 15 is connected with each long blade 12 in a one-to-one correspondence.

In use, the drainage blades 15 are immersed in water together with the water intake of the drain pump, and the drainage blades 15 agitate the water to lift the water into the inner cavity of the impeller 10. In order to improve the drainage effect, the width of the drainage blade 15 in the water flow direction may be gradually increased, and the whole smoothly transits.

In the embodiment of the application, 4 drainage blades 15 are correspondingly arranged and are fixedly connected with one long blade 12 respectively. At this time, the 4 drainage blades 15 are also integrally formed in a cross-shaped structure.

As shown in fig. 2 and 4, in the embodiment of the present application, the plate-like structure 131 gradually slopes from the center to the outside in the direction toward the long blade 12. At this time, the plate-like structure 131 has a smooth circular arc slope as a whole. That is, the plate-like structure 131 extends obliquely from the center outwardly toward the axis of the impeller shaft 11 in the direction toward the long blades 12.

Through the setting for platelike structure wholly forms "funnel" form structure, can play better propelling movement guiding action to rivers, has avoided the rivers to promote the back whereabouts, and the rivers promotes steadily, is favorable to the noise reduction.

In the embodiment of the present application, 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. For example, the impeller 10 may be a plastic piece and be integrally formed by an injection molding process.

Alternatively, the impeller may be made by other integral molding. For example, the impeller may be a metal piece, in which case the integral structure may be formed by forging or the like.

In another aspect, an embodiment of the present application also provides a drain pump 100. The drain pump 100 may be applied to an electric appliance having a drain requirement such as an air conditioner indoor unit, a washing machine, a dish washer, etc., and the present application is not limited thereto. Fig. 5 is a schematic diagram illustrating an overall structure of a drain pump 100 according to an embodiment of the present application.

As shown in fig. 5, the drain pump 100 according to the embodiment of the present application includes the impeller 10, the pump case 20, and the motor 30 according to the previous embodiments. Wherein,,

the pump casing 20 has a housing chamber formed therein, and the impeller 10 and the motor 30 are disposed in the housing chamber. The impeller 10 is movably accommodated in the pump casing 20, and an output shaft of the motor 30 is fixedly connected with the impeller shaft 11, so that the impeller 10 can be driven to rotate to generate suction force.

Alternatively, the pump housing 20 may be constructed of a plastic material, thereby facilitating the overall weight of the drain pump.

Alternatively, the pump housing 20 may include an upper pump housing and a lower pump housing, which may be detachably coupled as a unitary structure by screws, snaps, etc., to define the receiving chamber.

In the embodiment of the present application, the motor 30 is also disposed in the accommodation chamber.

Alternatively, in other embodiments, the motor 30 can also be arranged outside the receiving space, into which the motor output shaft extends from the outside of the pump housing and is fixedly connected to the impeller shaft 11.

The pump case 20 is provided with a water suction port 40 and a water discharge port 50, respectively, and the motor 30 drives the impeller 10 to rotate, and water is sucked into the pump case 20 through the suction port 40 under the action of centrifugal force and then discharged through the water discharge port 50.

As shown in fig. 5, the drain pump 100 further includes a power line 60, and the power line 60 is connected to the motor 30 to supply power to the motor 30.

Alternatively, the motor 30 may be a single-phase permanent magnet synchronous motor. At this time, the motor 30 may include a stator, a rotor, and a motor output shaft.

In the operation process of the drainage pump 100, the stator drives the rotor to rotate, and drives the impeller 10 to rotate through the motor output shaft and the impeller shaft 12, water is sucked into the pump shell 20 through the water suction port 40, and finally is discharged through the drainage port 50. Because the structure of the impeller 10 is optimized, the internal and external pressure difference of the impeller 10 is balanced, and the vibration of the impeller 10 during operation is reduced, so that the noise generated by the impeller 10 during operation can be reduced.

Since the impeller 10 provided in the foregoing embodiment is adopted in the drain pump 100, the drain pump 100 also has the technical effects corresponding to the impeller 10 described above, and will not be described herein.

In yet another aspect, an embodiment of the present application further provides an air conditioner indoor unit 1000. Fig. 6 is a schematic structural diagram of an indoor unit 1000 of an air conditioner according to an embodiment of the present application.

As shown in fig. 6, an indoor unit 1000 of an air conditioner according to an embodiment of the present application includes a drain pump 100 and a condensate water tray 200 according to the previous embodiments. The water suction port 40 of the drain pump 100 communicates with the condensate water tray 200, so that condensate water collected in the condensate water tray 200 can be discharged.

The indoor unit 1000 further includes an evaporator 300, and the condensate water tray 200 is disposed below the evaporator 300 for collecting condensate water condensed on the surface of the evaporator 300. The condensate tray may also be generally referred to as a water accumulation tray, water collection tray, or the like.

In order to improve the convection heat transfer effect, one side of the evaporator 300 is also correspondingly provided with an indoor fan 400.

Alternatively, the indoor fan 400 may be an EC fan. The EC fan has the advantages of energy conservation, high efficiency, small vibration, low noise and the like.

Since the impeller 10 provided in the foregoing embodiment is adopted in the indoor unit 1000 of the air conditioner, the indoor unit 1000 of the air conditioner also has technical effects corresponding to the impeller 10 described above, and will not be described herein again.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. An impeller (10), characterized by comprising:

an impeller shaft (11);

the disc (13), the disc (13) comprises a plate-shaped structure (131) and an annular structure (132), the plate-shaped structure (131) is sleeved on the periphery of the impeller shaft (11), the annular structure (132) is fixedly connected with the outer side edge of the plate-shaped structure (131), the plate-shaped structure (131) is provided with at least one balance through hole (16) which is communicated with the inner side and the outer side of the disc (13), and the balance through hole (16) is arranged adjacent to the outer side edge of the plate-shaped structure (131);

the long blade (12), long blade (12) fixed connection in impeller shaft (11), long blade (12) are followed the radial outside extension of impeller shaft (11), long blade (12) outer tip with form the clearance between annular structure (132), in the circumference of disc (13), balance through-hole (16) with long blade (12) interval sets up, in the radial direction of long blade (12), balance through-hole (16) inwards extend beyond long blade (12) outer tip.

2. The impeller (10) of claim 1, wherein the plurality of long blades (12) and the plurality of balancing through holes (16) are provided, and a plurality of balancing through holes (16) are provided between adjacent long blades (12).

3. Impeller (10) according to claim 1, characterized in that at least one short vane (14) is provided on the plate-like structure (131) and between two adjacent long vanes (12), the outer ends of the short vanes (14) forming a gap with the ring-like structure (132).

4. The impeller (10) of claim 3, wherein a gap size formed between the short blades (14) and the annular structure (132) is different than a gap size formed between the long blades (12) and the annular structure (132).

5. An impeller (10) according to claim 3, characterized in that the balancing through holes (16) and the short blades (14) are arranged at intervals in the circumferential direction of the disc (13).

6. The impeller (10) of claim 5, wherein the balance through holes (16) extend inwardly beyond the outer ends of the short blades (14) in the radial direction of the long blades (12).

7. The impeller (10) of claim 1, wherein the balance through hole (16) is formed as a circular hole.

8. The impeller (10) of claim 7, wherein the balancing through holes (16) are plural, and the diameters of the plural balancing through holes (16) are the same.

9. The impeller (10) according to any one of claims 1-8, characterized in that the impeller (10) is manufactured in one piece by means of an injection molding process.

10. A drain pump, comprising:

a pump housing (20) and a motor (30);

the impeller (10), the impeller (10) is an impeller (10) according to any one of claims 1-9, the impeller (10) is movably accommodated in the pump casing (20), and the output end of the motor (30) is fixedly connected with the impeller shaft (11).

11. An indoor unit of an air conditioner, comprising a condensate pan (200) and a drain pump as claimed in claim 10, wherein a water suction port of the drain pump is in communication with the condensate pan (200).