Impeller, drainage pump with impeller and air conditioner

Abstract

The utility model provides an impeller, a drainage pump with the impeller and an air conditioner. The impeller disc is arranged on the periphery of the impeller shaft in a sleeving manner; the multiple first blades are connected with the impeller disc and distributed in the circumferential direction of the impeller shaft at intervals, one end of each first blade is connected with the impeller shaft, and the other end of each first blade extends outwards in the radial direction of the impeller shaft; the second blades are connected with the impeller disc and extend in the radial direction of the impeller shaft, and the second blades are arranged in the circumferential direction of the impeller shaft at intervals; the impeller disc is provided with a plurality of through holes, the through holes correspond to the second blades one to one, and the through holes are formed in the radial outer sides of the corresponding second blades and are opposite to the second blades in the radial direction of the impeller shaft. According to the impeller, the through holes are formed in the radial outer sides of the corresponding second blades and are opposite to the second blades in the radial direction of the impeller shaft, so that turbulent flow and vortex can be reduced, and noise of the drainage pump can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to air conditioner manufacturing technical field especially is related to a kind of impeller and the drainage pump and air conditioner with it. BACKGROUND

[0002] The impeller in prior art, liquid flows to the process of through hole from water inlet, due to the unreasonable setting position of through hole, liquid cannot flow to through hole stably, turbulent flow and vortex phenomenon are prone to, to cause the noise of drainage pump too large. SUMMARY

[0003] The utility model aims at at least one of the technical problems existing in prior art is solved.For this purpose, the utility model provides an impeller, which can reduce the noise of the drainage pump.

[0004] The utility model further provides a drainage pump with the above-mentioned impeller.

[0005] The utility model further provides an air conditioner with the above-mentioned drainage pump.

[0006] According to the impeller of the utility model embodiment, including: impeller shaft;Impeller disc, the impeller disc is sleeved on the outer periphery of the impeller shaft, and the water inlet of the impeller is defined between the impeller disc and the impeller shaft cooperation;Multiple first blades, multiple the first blade is connected with the impeller disc and is arranged at the circumference of the impeller shaft, and one end of the first blade is connected with the impeller shaft, and the other end extends outward along the radial direction of the impeller shaft;Multiple second blades, the second blade is connected with the impeller disc, and extends along the radial direction of the impeller shaft, multiple the second blade is arranged at the circumference of the impeller shaft, the first blade and the second blade are arranged on the same side of the impeller disc in the axial direction, and in the radial direction of the impeller shaft, the radial outer end of the first blade exceeds the radial outer end of the second blade;Wherein, the impeller disc is provided with multiple through holes, multiple the through hole and multiple the second blade one-to-one correspondence, the through hole is arranged at the radial outer side of corresponding the second blade, and is opposite to the second blade in the radial direction of the impeller shaft.

[0007] According to the impeller of the utility model, the through hole is arranged at the radial outer side of corresponding second blade and opposite to second blade in the radial direction of impeller shaft, and water in impeller can only flow to through hole along the edge of second blade, so that the formation of turbulent flow and vortex can be reduced, and the noise of drainage pump can be reduced.

[0008] According to some embodiments of the utility model, in the radial direction of the impeller shaft, the spacing between the through hole and the second blade is less than or equal to 2mm.

[0009] According to some optional embodiments of the present application, the through hole is a circular hole, and the through hole is tangent to the radial outer end surface of the second blade.

[0010] According to some embodiments of the present application, the second blade has a median vertical plane parallel to the radial direction of the impeller shaft, and the median vertical plane of the second blade passes through the central axis of the corresponding through hole.

[0011] According to some embodiments of the present application, in the circumferential direction of the impeller shaft, the end surface of the second blade away from the impeller shaft is formed as an arc surface protruding away from the impeller shaft.

[0012] According to some embodiments of the present application, the through hole is a circular hole, and the diameter of the through hole is greater than or equal to the thickness of the second blade in the circumferential direction of the impeller shaft.

[0013] According to some embodiments of the present application, the length of the second blade in the radial direction of the impeller shaft is greater than or equal to 1 / 2 of the length of the first blade.

[0014] According to some embodiments of the present application, the impeller comprises a ring plate connected with the radial outer periphery of the impeller disc and extending in the circumferential direction of the impeller disc to form a ring shape, and the ring plate, the impeller disc and the impeller shaft cooperatively define a cavity of the impeller, and the first blade and the second blade are both located in the cavity.

[0015] According to some optional embodiments of the present application, the height of the first blade and the second blade in the axial direction of the impeller shaft is lower than the ring plate.

[0016] According to the drainage pump of the second aspect of the present application, the pump shell, the motor, and the impeller according to the first aspect of the present application are provided, the impeller is arranged in the pump shell, and the output shaft of the motor is fixedly connected with the impeller shaft.

[0017] According to the drainage pump of the present application, by arranging the impeller of the first aspect of the present application, the through hole is arranged on the radial outer side of the corresponding second blade and opposite to the second blade in the radial direction of the impeller shaft, and the water in the impeller can only flow to the through hole along the edge of the second blade, so that the formation of turbulent flow and vortex flow can be reduced, and the noise of the drainage pump can be reduced.

[0018] According to the air conditioner of the third aspect of the present application, the air conditioner comprises the drainage pump according to the second aspect of the present application.

[0019] According to the air conditioner of the utility model, through setting the drainage pump of the second aspect embodiment, the impeller of the first aspect is arranged on the drainage pump, the through hole is arranged at the radial outside of the corresponding second blade and opposite to the second blade in the radial direction of the impeller shaft, and the water in the impeller can only flow to the through hole along the edge of the second blade, so that the formation of turbulent flow and vortex can be reduced, and the noise of the drainage pump can be reduced.

[0020] Additional aspects and advantages of the utility model will be in part given in the following description, some will become apparent from the following description, or be understood by practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic view of the impeller shown in the figure.

[0022] Figure 2 is Figure 1 a schematic view of one angle of the impeller shown in the figure.

[0023] Figure 3 is Figure 1 a schematic view of another angle of the impeller shown in the figure.

[0024] Figure 4 is Figure 1 a schematic view of still another angle of the impeller shown in the figure.

[0025] Figure 5 is Figure 1 a schematic view of still another angle of the impeller shown in the figure.

[0026] REFERENCE NUMERALS:

[0027] 100, impeller;

[0028] 10, impeller shaft;

[0029] 20, impeller disc; 21, water inlet; 22, through hole;

[0030] 30, first blade;

[0031] 40, second blade;

[0032] 50, ring plate;

[0033] 200, pump shell; 210, water outlet;

[0034] 300, motor;

[0035] 1000, drainage pump. DETAILED DESCRIPTION

[0036] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0037] The following description of embodiments of the present application is made with reference to the accompanying drawings, in which Figures 1-5 A description is made of an impeller 100 according to an embodiment of the present application.

[0038] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the impeller 100 according to an embodiment of the present application comprises: an impeller shaft 10; an impeller disc 20, the impeller disc 20 being sleeved on the outer periphery of the impeller shaft 10, and the impeller disc 20 and the impeller shaft 10 cooperatively defining a water inlet 21 of the impeller 100; a plurality of first blades 30, that is, the number of the first blades 30 can be two, three or four or more, the plurality of first blades 30 being connected to the impeller disc 20 and arranged at intervals in the circumferential direction of the impeller shaft 10, one end of the first blade 30 being connected to the impeller shaft 10 and the other end extending outward in the radial direction of the impeller shaft 10; a plurality of second blades 40, that is, the number of the second blades 40 can be two, three or four or more, the second blades 40 being connected to the impeller disc 20 and extending in the radial direction of the impeller shaft 10, the plurality of second blades 40 being arranged at intervals in the circumferential direction of the impeller shaft 10, the first blades 30 and the second blades 40 being arranged on the same side of the impeller disc 20 in the axial direction (as shown in the upper side of the impeller shaft 10), and in the radial direction of the impeller shaft 10, the radial outer end of the first blade 30 exceeding the radial outer end of the second blade 40. Figure 2

[0039] Among them, the impeller disc 20 is provided with a plurality of through holes 22, that is, the impeller disc 20 can be provided with two, three or four or more numbers of through holes 22, the plurality of through holes 22 corresponding to the plurality of second blades 40 one by one, the through hole 22 being arranged on the radial outer side of the corresponding second blade 40 and being opposite to the second blade 40 in the radial direction of the impeller shaft 10, and the radial outer end of the first blade 30 not being provided with a through hole 22. The through hole 22 is mainly used to reduce the axial force, that is, the force along the direction of the impeller shaft 10, the through hole 22 allowing the liquid to flow from the high pressure side of the impeller disc 20 to the low pressure side, thereby reducing the axial thrust acting on the impeller 100, the reduction of the axial thrust can reduce the load of the impeller shaft 10, and further can reduce the noise caused by mechanical vibration.

[0040] For example, as Figure 1 , Figure 2 , Figure 3 and Figure 4 ​As shown, the impeller shaft 10 extends in the up-down direction, the impeller disc 20 is sleeved on the outer periphery of the impeller shaft 10, the radially inner end of the first blade 30 is connected with the impeller shaft 10, the radially outer end of the first blade 30 extends outward in the radial direction of the impeller shaft 10, and the lower side of the radially outer end of the first blade 30 is connected with the impeller disc 20, the lower end of the second blade 40 is connected with the impeller disc 20, the second blade 40 extends outward in the radial direction of the impeller shaft 10, the first blade 30 and the second blade 40 are arranged on the upper side of the impeller disc 20, and the first blade 30 and the second blade 40 are alternately arranged in the circumferential direction of the impeller disc 20, the impeller disc 20 is provided with a plurality of through holes 22 penetrating the impeller disc 20 in the up-down direction, the through hole 22 is located at the radially outer end of the second blade 40, and in the radial direction of the impeller shaft 10, the through hole 22 can be tangent to the end of the second blade 40, or the through hole 22 can be arranged in a spaced manner with the second blade 40.

[0041] When the impeller 100 is running, the impeller shaft 10 rotates to drive the impeller disc 20 to rotate, liquid flows from the water inlet 21 to the radially outer end of the second blade 40 through the gap between the first blade 30 and the second blade 40, and then the liquid flows out of the impeller 100 from the through hole 22, at this time, the drain pump 1000 completes the work of draining the condensed water.

[0042] The impeller 100 of the utility model, the through hole 22 is arranged on the radially outer side of the corresponding second blade 40 and opposite to the second blade 40 in the radial direction of the impeller shaft 10, therefore, liquid can flow stably to the through hole 22 along the edge of the second blade 40, compared with the prior art that the through hole 22 does not correspond to the second blade 40, which causes liquid to be unable to flow stably to the through hole 22, the water in the impeller 100 of the present application can only flow to the through hole 22 along the edge of the second blade 40, so that the stability of liquid flow can be ensured, the formation of turbulent flow and vortex flow is reduced, and then the noise of the drain pump 1000 can be reduced, simultaneously, in the running process of the drain pump 1000, the drain pump 1000 will produce resonance, when liquid stably flows out of the drain pump 1000 through the through hole 22 along the second blade 40, the pressure distribution inside the impeller 100 can be changed, so that the generation of resonance condition can be avoided, and then the noise of the drain pump 1000 in the range of low lift can be effectively reduced, and the noise requirement of the main scene of the air conditioner can be met.

[0043] Further, in the rotating process of the impeller 100, the through hole 22 can help to alleviate the problem of asymmetric pressure distribution by homogenizing the pressure on both sides of the impeller disc 20, so that the pressure pulsation of the impeller disc 20 is more gentle, and thus the noise can be further reduced.

[0044] According to the impeller 100 of the embodiment of the utility model, the through hole 22 is arranged at the radial outer side of the corresponding second blade 40 and opposite to the second blade 40 in the radial direction of the impeller shaft 10, and the water in the impeller 100 can only flow to the through hole 22 along the edge of the second blade 40, so that the formation of turbulent flow and vortex can be reduced, and the noise of the drainage pump 1000 can be reduced.

[0045] According to some embodiments of the utility model, referring to Figure 2 and Figure 3 , the spacing between the through hole 22 and the second blade 40 in the radial direction of the impeller shaft 10 is less than or equal to 2mm. Thus, limiting the spacing between the through hole 22 and the second blade 40 helps to ensure that the fluid can flow smoothly through the through hole 22, reducing the formation of unnecessary turbulent flow or vortex, so that the generation of noise can be reduced, and at the same time, the mechanical strength and stiffness of the impeller disc 20 can be guaranteed, which can effectively prevent material fatigue or fracture caused by stress concentration.

[0046] For example, as shown in Figure 2 and Figure 3 , the spacing between the through hole 22 and the second blade 40 can be 0mm, 0.2mm, 0.4mm, 0.6mm, 0.8mm, 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm or 2mm.

[0047] According to some optional embodiments of the utility model, referring to Figure 2 and Figure 3 , the through hole 22 is a circular hole, and the through hole 22 is tangent to the radial outer end face of the second blade 40. Thus, the circular hole can reduce the edge effect, realize more uniform fluid flow, so that the noise can be reduced, and at the same time, the process of liquid flowing from the high pressure side to the low pressure side of the impeller disc 20 can realize a smoother transition, reducing the formation of unnecessary turbulent flow and vortex, so that the generation of noise can be reduced, and the liquid transmission efficiency can be improved.

[0048] According to some embodiments of the utility model, referring to Figure 2 and Figure 3 , the second blade 40 has a median plane parallel to the radial direction of the impeller shaft 10, the median plane of the second blade 40 passes through the central axis of the corresponding through hole 22, and the median plane is a plane passing through the midpoint of a line segment and perpendicular to the line segment. Thus, it helps to ensure that the pressure distribution of the liquid when passing through the through hole 22 is more uniform, reducing the formation of local high or low pressure area, so that the generation of noise can be reduced, and the pumping efficiency can be improved.

[0049] According to some embodiments of the utility model, referring to Figure 2 and Figure 3In the circumferential direction of the impeller shaft 10, the second blade 40 is formed with an arc surface away from the end face of the impeller shaft 10, which protrudes away from the impeller shaft 10. Thus, the arc surface can provide a smoother flow path, reduce the possibility of liquid separation at the radial outer end of the second blade 40, thereby reducing the formation of turbulence and vortex, which can effectively improve the pumping efficiency.

[0050] According to some embodiments of the present application, referring to Figure 2 and Figure 3 The through hole 22 is a circular hole, and the hole diameter of the through hole 22 is greater than or equal to the thickness of the second blade 40 in the circumferential direction of the impeller shaft 10. Thus, it can be ensured that the through hole 22 has a sufficient flow cross section, so as to ensure the pumping efficiency of the drainage pump 1000, and at the same time, the defined hole diameter enables the fluid to flow more smoothly from the high pressure side of the impeller disc 20 to the low pressure side, reducing the generation of turbulence and vortex, thereby reducing noise and vibration caused by irregular flow.

[0051] According to some embodiments of the present application, referring to Figure 4 and Figure 5 The length of the second blade 40 in the radial direction of the impeller shaft 10 is greater than or equal to 1 / 2 of the length of the first blade 30. Thus, the length of the second blade 40 can better participate in the process of guiding and accelerating the liquid, so that the pressure distribution is more uniform, reducing the formation of local high or low pressure area, improving the pumping efficiency, and at the same time, by providing a longer effective working length, the second blade 40 can help maintain a relatively smooth fluid path, reducing the generation of turbulence and vortex, thereby reducing energy loss.

[0052] According to some embodiments of the present application, referring to Figure 4 and Figure 5 The impeller 100 comprises a ring plate 50 connected with the radial outer periphery of the impeller disc 20 and extending in the circumferential direction of the impeller disc 20 to form a ring shape, the ring plate 50, the impeller disc 20 and the impeller shaft 10 cooperatively define a cavity of the impeller 100, and the first blade 30 and the second blade 40 are both located in the cavity. Thus, the ring plate 50 can prevent the liquid from flowing back into the water inlet 21, avoiding unnecessary energy consumption, which helps to improve the overall efficiency of the drainage pump 1000, and at the same time, the first blade 30 and the second blade 40 jointly act, so as to guide the liquid to flow to the through hole 22 in the space defined by the first blade 30 and the second blade 40, thereby ensuring that the drainage pump 1000 can work normally.

[0053] For example, as Figure 2 and Figure 3As shown, the ring plate 50 is provided with the upper side of the impeller disk 20, and the lower end of the ring plate 50 is connected to the outer periphery of the impeller disk 20. The ring plate 50 extends in a ring shape along the circumference of the impeller disk 20. The ring plate 50, the impeller disk 20 and the impeller shaft 10 cooperate to define the upper open cavity.

[0054] According to some embodiments of this utility model, refer to Figure 1 and Figure 1 The first blade 30 and the second blade 40 are in the axial direction of the impeller shaft 10 (e.g., Figure 2 The height of the impeller shaft 10 (in the vertical direction) is lower than that of the annular plate 50. This ensures that the first blade 30 and the second blade 40 are both located within the cavity, thus avoiding the first blade 30 and the second blade 40 from protruding above the cavity and causing the impeller 100 to occupy too much volume, thereby facilitating the installation of the impeller 100 within the pump casing 200.

[0055] According to the drainage pump 1000 of the second aspect of this utility model, refer to Figure 1 and Figure 2 The pump includes a pump housing 200, a motor 300, and an impeller 100 according to the first aspect of the present invention. The impeller 100 is disposed inside the pump housing 200, and the output shaft of the motor 300 is fixedly connected to the impeller shaft 10.

[0056] For example, such as Figure 1 and Figure 2 As shown, the motor 300 and impeller 100 are both located inside the pump casing 200. The output shaft of the motor 300 is connected to the impeller 100. The rotation of the output shaft of the motor 300 drives the impeller 100 to rotate. The rotation of the impeller 100 drives the liquid to enter the cavity from the inlet 21. Then the liquid flows along the edge of the second blade 40 to the through hole 22. After that, the liquid flows out of the drain pump 1000 through the pump casing 200.

[0057] According to the present invention, the drainage pump 1000 is provided with an impeller 100 according to the first aspect of the present invention, and a through hole 22 is arranged on the radial outer side of the corresponding second blade 40 and opposite to the second blade 40 in the radial direction of the impeller shaft 10. Water in the impeller 100 can only flow along the edge of the second blade 40 to the through hole 22, thereby reducing the formation of turbulence and eddies, and thus reducing the noise of the drainage pump 1000.

[0058] According to the air conditioner of the third aspect of this utility model, referring to... Figures 1-5 and Figure 1 This includes the drainage pump 1000 according to the second aspect of the present invention.

[0059] According to the air conditioner of the utility model, through setting up the drainage pump 1000 according to the second aspect of the utility model, the impeller 100 is arranged on the drainage pump 1000, the through hole 22 is arranged on the radial outer side of the corresponding second blade 40 and is opposite to the second blade 40 in the radial direction of the impeller shaft 10, and the water in the impeller 100 can only flow to the through hole 22 along the edge of the second blade 40, so that the formation of turbulent flow and vortex can be reduced, and the noise of the drainage pump 1000 can be reduced.

[0060] The air conditioner according to the utility model will be described below. ​ The air conditioner according to the utility model will be described below.

[0061] The air conditioner according to the utility model will be described below. ​ The air conditioner according to the utility model will be described below.

[0062] The drainage pump 1000 comprises a pump shell 200, a motor 300 and an impeller 100, the impeller 100 and the motor 300 are arranged in the pump shell 200, the output shaft of the motor 300 is fixedly connected with the impeller shaft 10, and a water outlet 210 is arranged on the pump shell 200.

[0063] The impeller 100 comprises an impeller shaft 10, an impeller disc 20, first blades 30, second blades 40 and a ring plate 50.

[0064] The number of the first blades 30 is multiple, the multiple first blades 30 are connected with the impeller disc 20 and are arranged at intervals in the circumferential direction of the impeller shaft 10, the radial inner end of the first blade 30 is connected with the impeller shaft 10, and the radial outer end extends outward in the radial direction of the impeller shaft 10, the lower side of the radial outer end of the first blade 30 is connected with the impeller disc 20, the lower end of the second blade 40 is connected with the impeller disc 20 and extends in the radial direction of the impeller shaft 10, the number of the second blades 40 is multiple, the multiple second blades 40 are arranged at intervals in the circumferential direction of the impeller shaft 10, the first blades 30 and the second blades 40 are arranged on the upper side of the impeller disc 20, and in the radial direction of the impeller shaft 10, the radial outer end of the first blade 30 exceeds the radial outer end of the second blade 40, and the length of the second blade 40 in the radial direction of the impeller shaft 10 is greater than or equal to 1 / 2 of the length of the first blade 30.

[0065] The impeller disc 20 is provided with a plurality of through holes 22 corresponding to the plurality of second blades 40, the through holes 22 are arranged at the radial outer side of the corresponding second blades 40 and opposite to the second blades 40 in the radial direction of the impeller shaft 10, and the through holes 22 are communicated with the cavity and the water outlet 210.

[0066] The through holes 22 are circular holes, and the through holes 22 are tangent to the radial outer end faces of the second blades 40. The second blades 40 have a median plane parallel to the radial direction of the impeller shaft 10, and the median plane of the second blades 40 passes through the central axis of the corresponding through holes 22. In the circumferential direction of the impeller shaft 10, the end face of the second blade 40 away from the impeller shaft 10 is formed as an arc surface protruding away from the impeller shaft 10.

[0067] When the drainage pump 1000 is running, the output shaft of the motor 300 drives the impeller shaft 10 of the impeller 100 to rotate, the impeller shaft 10 drives the impeller disc 20 to rotate through the first blades 30, and the liquid in the condensate tray flows to the cavity through the water inlet 21, then the liquid flows along the edge of the second blades 40 towards the through holes 22 in the space defined by the first blades 30 and the second blades 40, and then the liquid flows out of the pump shell 200 through the water outlet 210, at this time, the work of discharging the liquid in the condensate tray out of the air conditioner is completed.

[0068] According to the air conditioner of the utility model, through setting the drainage pump 1000 according to the second aspect of the utility model, the impeller 100 of the first aspect is arranged on the drainage pump 1000, the through holes 22 are arranged at the radial outer side of the corresponding second blades 40 and opposite to the second blades 40 in the radial direction of the impeller shaft 10, and the water in the impeller 100 can only flow to the through holes 22 along the edge of the second blades 40, so that the formation of turbulent flow and vortex can be reduced, and the noise of the drainage pump 1000 can be reduced.

[0069] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0070] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and do not connote or imply any relative importance or order of magnitude. Thus, features with "first", "second", "third" designations can include one or more of the features implicitly or explicitly. In the description of the present application, the meaning of "a plurality" is two or more, unless specifically defined otherwise.

[0071] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0072] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0073] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An impeller (100), characterized in that Comprising: a impeller shaft (10); a impeller disc (20), the impeller disc (20) is sleeved on the outer periphery of the impeller shaft (10), and the cooperation between the impeller disc (20) and the impeller shaft (10) defines a water inlet (21) of the impeller (100); a plurality of first blades (30), the plurality of first blades (30) are connected with the impeller disc (20) and are arranged in a circumferential direction of the impeller shaft (10), one end of the first blade (30) is connected with the impeller shaft (10), and the other end extends outward in a radial direction of the impeller shaft (10); a plurality of second blades (40), the second blades (40) are connected with the impeller disc (20) and extend in the radial direction of the impeller shaft (10), the plurality of second blades (40) are arranged in the circumferential direction of the impeller shaft (10), the first blades (30) and the second blades (40) are arranged on the same side of the impeller disc (20) in an axial direction, and in the radial direction of the impeller shaft (10), the radial outer end of the first blade (30) is beyond the radial outer end of the second blade (40); wherein, a plurality of through holes (22) are arranged on the impeller disc (20), the plurality of through holes (22) correspond to the plurality of second blades (40) one by one, the through hole (22) is arranged on the radial outer side of the corresponding second blade (40) and opposite to the second blade (40) in the radial direction of the impeller shaft (10).

2. The impeller (100) according to claim 1, characterized in that In the radial direction of the impeller shaft (10), the distance between the through hole (22) and the second blade (40) is less than or equal to 2mm.

3. The impeller (100) according to claim 2, characterized in that The through hole (22) is a circular hole, and the through hole (22) is tangent to the end face of the radial outer end of the second blade (40).

4. The impeller (100) according to any one of claims 1-3, characterized in that The second blade (40) has a median plane parallel to the radial direction of the impeller shaft (10), and the median plane of the second blade (40) passes through the central axis of the corresponding through hole (22).

5. The impeller (100) according to any one of claims 1-3, characterized in that In the circumferential direction of the impeller shaft (10), the end face of the one end of the second blade (40) away from the impeller shaft (10) is formed as an arc surface protruding away from the impeller shaft (10).

6. The impeller (100) according to any one of claims 1-3, characterized in that The through hole (22) is a circular hole, and the hole diameter of the through hole (22) is greater than or equal to the thickness of the second blade (40) in the circumferential direction of the impeller shaft (10).

7. The impeller (100) of claim 1, wherein The length of the second blade (40) in the radial direction of the impeller shaft (10) is greater than or equal to 1 / 2 of the length of the first blade (30).

8. The impeller (100) of claim 1, wherein Comprising: a ring plate (50), the ring plate (50) is connected with the radial outer periphery of the impeller disc (20) and extends in a ring shape in the circumferential direction of the impeller disc (20), the ring plate (50), the impeller disc (20) and the impeller shaft (10) cooperate to define a cavity of the impeller (100), and the first blade (30) and the second blade (40) are located in the cavity.

9. The impeller (100) according to claim 8, characterized in that The height of the first blade (30) and the second blade (40) in the axial direction of the impeller shaft (10) is lower than the ring plate (50).

10. A drainage pump (1000) characterized in that, Comprising: a pump shell (200); A motor (300); The impeller (100) according to any one of claims 1-9, wherein the impeller (100) is arranged in the pump housing (200), and an output shaft of the motor (300) is fixedly connected with the impeller shaft (10).

11. An air conditioner characterized by comprising: A drainage pump (1000) comprising the impeller (100) according to claim 10.

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