Impeller, draining pump and air conditioner

Abstract

The utility model discloses an impeller, a drainage pump and an air conditioner, and belongs to the technical field of drainage pumps. The impeller comprises a rotating disc, a main shaft, a water inlet blade, a flow guide ring and a plurality of main blades, the rotating disc is provided with a first surface and a second surface opposite to each other, and a water passing hole is formed in the center of the rotating disc; the water inlet blade is arranged on the water inlet side of the water passing hole and connected with the main shaft. The multiple main blades are connected to the first surface and are radially arranged in the circumferential direction of the main shaft, and the ends, away from the main shaft, of the main blades and the flow guide ring are arranged at intervals; protruding parts are arranged on the end faces of the main blades and / or the water inlet blades, the protruding parts are arranged in the length direction of the end faces, at least one protruding part is arranged in the width direction of the end faces, and the contour lines of the protruding parts are at least partially in an arc shape. Water or gas can flow through at least one of the main blade and the water inlet blade more stably, friction and collision between the impeller and the water and the gas are reduced, and noise is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of drainage pumps, in particular to an impeller, a drainage pump and an air conditioner. Background Art

[0002] When the air conditioner is running, condensed water will be generated when the indoor air exchanges heat with the internal parts of the air conditioner. In order to drain the accumulated condensed water, a drainage pump is generally installed at the condensate tray of the indoor unit of the air conditioner. Among them, the impeller is an important part of the drainage pump. The impeller is driven by the motor to rotate, and the impeller creates a vacuum to suck in water, and then discharges the water through high-speed rotation. Because the impeller is often in an unstable water-gas mixture state, the irregular movement of water and gas will cause violent friction and collision with the impeller blades, resulting in noise. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides an impeller, which can reduce the friction and collision between the impeller and water and gas, thereby reducing the generation of noise.

[0004] The utility model also provides a drainage pump and an air conditioner comprising the impeller.

[0005] The impeller according to the first aspect of the present invention comprises: a turntable, a main shaft, water inlet blades, a guide ring and a plurality of main blades, the turntable having a first surface and a second surface facing each other, a water hole being arranged at the center of the turntable; the main shaft passing through the water hole and being arranged coaxially with the turntable; the water inlet blades being arranged at the water inlet side of the water hole and being connected to the main shaft; the guide ring being arranged around the outer periphery of the turntable; a plurality of the main blades being connected to the first surface, the plurality of the main blades being arranged radially along the circumference of the main shaft, the ends of the main blades away from the main shaft being arranged at intervals from the guide ring; wherein the end faces of the main blades and / or the water inlet blades are provided with convex portions, the convex portions being arranged along the length direction of the end faces, and at least one of the convex portions being arranged along the width direction of the end faces, and the contour line of the convex portions being at least partially arc-shaped.

[0006] The impeller according to the embodiment of the utility model has at least the following beneficial effects:

[0007] The impeller of the utility model embodiment is provided with a plurality of main blades on the first surface of the turntable, and the plurality of main blades are arranged radially along the circumference of the main shaft. Water entering the impeller from the water hole can be discharged from the impeller under the guidance of the main blades, wherein the end faces of the main blades and / or the water inlet blades are provided with convex portions, and at least one convex portion is arranged along the width direction of the end faces, and the contour line of the convex portion is at least partially arc-shaped. Compared with the flat end faces of the main blades and the water inlet blades, the provision of the convex portions can play a role in guiding flow, allowing water or gas to flow more smoothly, thereby reducing the friction and collision between the impeller and the water and gas, reducing the possibility of generating turbulence or eddy currents during operation, and thereby reducing the generation of noise. It is suitable for drainage pumps to effectively reduce the vibration of the drainage pump and reduce the noise level of the drainage pump.

[0008] According to some embodiments of the utility model, the end surface is provided with a convex portion, and along the width direction of the end surface, two ends of the convex portion are respectively provided with a first rounded corner, and two ends of the end surface are respectively provided with a second rounded corner.

[0009] According to some embodiments of the utility model, the end surface is provided with a plurality of the convex portions, and two adjacent convex portions are transitionally connected by an arc-shaped surface, and the outer contour of each convex portion is an arc-shaped surface.

[0010] According to some embodiments of the utility model, the main blade is a first blade, the first blade is connected to the main shaft, the end face of the first blade includes a first end face facing the guide ring, a second end face away from the first surface, and a third end face facing the water hole, and the convex portion is formed on at least one of the first end face, the second end face and the third end face.

[0011] According to some embodiments of the utility model, a part of the multiple main blades are first blades, and another part are second blades. The multiple first blades and the multiple second blades are arranged alternately along the circumference of the main shaft. Along the radial direction of the main shaft, the length of the first blade is greater than the length of the second blade. The first blade is connected to the main shaft, and the second blade is spaced apart from the main shaft. At least one of the first blade and the second blade is provided with the convex portion.

[0012] According to some embodiments of the utility model, the end surface of the first blade includes a first end surface facing the guide ring, a second end surface away from the first surface, and a third end surface facing the water hole, the end surface of the second blade includes a fourth end surface facing the guide ring, a fifth end surface away from the first surface, and a sixth end surface facing the main axis, and the convex portion is formed on at least one of the first end surface, the second end surface, the third end surface, the fourth end surface, the fifth end surface, and the sixth end surface.

[0013] According to some embodiments of the utility model, the water inlet blade is coaxially arranged with the main shaft, and the water inlet blade includes a plurality of third blades arranged circumferentially along the main shaft, and the convex portion is formed on at least one of the end surface of the third blade away from the central axis of the main shaft and the end surface of the third blade away from the second surface.

[0014] According to some embodiments of the present invention, the height of the protrusion protruding from the end face is 0.2 to 3 times the width of the end face, and along the width direction of the end face, the width of the protrusion is less than or equal to the width of the end face.

[0015] According to some embodiments of the utility model, a plurality of the protrusions form a guide portion, the height of the guide portion protruding from the end face is 0.2 to 3 times the width of the end face, and along the width direction of the end face, the width of the guide portion is less than or equal to the width of the end face.

[0016] According to some embodiments of the present invention, the convex portion is provided on the end surface of the guide ring away from the turntable.

[0017] According to the second embodiment of the utility model, the drainage pump comprises a rotor core and the impeller as described in the first embodiment, wherein the rotor core is rotatably disposed in the rotor hole.

[0018] According to the drainage pump of the second aspect embodiment of the utility model, it includes a shell, a pump cover, a motor and the impeller described in the first aspect embodiment, the shell is provided with a mounting cavity; the pump cover is connected to the shell and forms a drainage cavity with the shell, the pump cover is provided with a water inlet and a water outlet connected to the drainage cavity; the motor is arranged in the mounting cavity, and the rotating shaft of the motor extends from the mounting cavity into the drainage cavity; the impeller is arranged in the drainage cavity, the main shaft is connected to the rotating shaft, and the water inlet blades are arranged toward the water inlet.

[0019] The drainage pump according to the embodiment of the utility model has at least the following beneficial effects:

[0020] The drainage pump adopts the impeller of the first aspect embodiment. By optimizing the structure of the impeller, the end faces of the main blades and / or the water inlet blades are provided with convex portions, and at least one convex portion is arranged along the width direction of the end faces. The contour line of the convex portion is at least partially arc-shaped. Compared with the flat end faces of the main blades and the water inlet blades, the setting of the convex portion can play a role in guiding flow, allowing water or gas to flow more smoothly, thereby reducing the friction and collision between the impeller and the water and gas, and reducing the possibility of turbulence or eddy currents in the impeller during the operation of the drainage pump, thereby reducing the generation of noise, which not only effectively reduces the vibration of the drainage pump, but also can reduce the noise level of the drainage pump.

[0021] An air conditioner according to an embodiment of the third aspect of the utility model comprises the drainage pump described in the embodiment of the second aspect.

[0022] The air conditioner according to the embodiment of the utility model has at least the following beneficial effects:

[0023] The air conditioner adopts the drainage pump of the second aspect of the embodiment. Since the impeller in the drainage pump is structurally optimized, not only the vibration of the drainage pump is reduced, but also the noise generated by the drainage pump is reduced, thereby improving the stability of the air conditioner and reducing the overall noise level of the air conditioner, providing users with a better user experience.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0026] Figure 1 A cross-sectional view of a drainage pump according to an embodiment of the present utility model;

[0027] Figure 2 This is a schematic diagram of the overall structure of an impeller according to an embodiment of the utility model;

[0028] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0029] Figure 4 It is a partial structural schematic diagram of an impeller of an embodiment of the utility model;

[0030] Figure 5 A schematic top view of an impeller according to an embodiment of the utility model;

[0031] Figure 6 for Figure 5 A partial enlarged view of point B in the middle;

[0032] Figure 7 This is a schematic diagram of the overall structure of an impeller in another embodiment of the utility model;

[0033] Figure 8 for Figure 7 A partial enlarged view of point C in the middle;

[0034] Fig. 9 A schematic top view of an impeller according to another embodiment of the present invention;

[0035] Fig.10 for Fig. 9 A partial enlarged view of point D in the middle;

[0036] Fig.11 A schematic top view of an impeller according to another embodiment of the present invention;

[0037] Fig.12 It is a partial schematic diagram of the end surface of a main blade or a water inlet blade in one embodiment of the utility model.

[0038] Figure Number:

[0039] Impeller 10;

[0040] Rotating disk 100; first surface 110; second surface 120; water hole 130; through hole 140;

[0041] Spindle 200;

[0042] Inlet blade 300; third blade 310; seventh end surface 311; eighth end surface 312;

[0043] Guide ring 400; ninth end surface 410;

[0044] main blade 500; first blade 510; first end surface 511; second end surface 512; third end surface 513; second blade 520; fourth end surface 521; fifth end surface 522; sixth end surface 523;

[0045] Protrusion 600; first rounded corner 610; second rounded corner 620; guide portion 630;

[0046] Drain pump 1000;

[0047] Housing 101 ; installation cavity 1011 ; pump cover 102 ; drainage cavity 1021 ; water inlet 1022 ; water outlet 1023 ; motor 103 ; rotating shaft 1031 . DETAILED DESCRIPTION

[0048] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0049] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0050] In the description of the utility model, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0051] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0052] Some embodiments of the present invention provide an impeller 10 suitable for a drainage pump 1000, specifically referring to Figures 1 to 12 The impeller 10 is shown for illustration.

[0053] Reference Figure 1 As shown, in an embodiment of the utility model, the impeller 10 is arranged in the drainage chamber 1021 near the water inlet 1022, and the drainage pump 1000 also includes a motor 103, which is transmission-connected to the impeller 10, thereby driving the entire impeller 10 to rotate, thereby being able to suck water into the drainage pump 1000.

[0054] Specifically, refer to Figure 2 , Figure 4 and Figure 7 As shown, in the embodiment of the utility model, the impeller 10 comprises: a rotating disk 100, a main shaft 200, a water inlet blade 300, a guide ring 400 and a plurality of main blades 500, wherein the rotating disk 100 has a first surface 110 and a second surface 120 which are arranged opposite to each other, and a water hole 130 is arranged at the center of the rotating disk 100, and the water hole 130 passes through the rotating disk 100. The two ends of the inner wall of the water hole 130 are respectively connected to the first surface 110 and the second surface 120, specifically, the first surface 110 faces the water outlet side of the water hole 130, and the second surface 120 faces the water inlet side of the water hole 130. In the embodiment, the main shaft 200 is arranged through the water hole 130 and is coaxially arranged with the rotating disk 100, wherein the aperture of the water hole 130 is larger than the shaft diameter of the main shaft 200, and therefore, the gap formed between the inner wall of the water hole 130 and the outer peripheral wall of the main shaft 200 can allow water to pass through.

[0055] Reference Figure 3As shown, in the embodiment of the utility model, the water inlet blade 300 is connected to the end of the main shaft 200. Specifically, the water inlet blade 300 is arranged on the water inlet side of the water hole 130, that is, it is located on the same side of the rotating disk 100 as the second surface 120. During use, the water inlet blade 300 is immersed in water together with the water inlet 1022 of the drainage pump 1000, and the water inlet blade 300 lifts and sucks water into the water hole 130 by stirring the water. In this embodiment, the cross section of the water inlet blade 300 is a "cross" structure, and can also be a spiral structure, which is not limited in this embodiment.

[0056] Reference Figure 2 and Figure 7 As shown, in the embodiment of the utility model, the main blade 500 is protruded from the first surface 110, and the main blade 500 is connected to the first surface 110. Specifically, the main blade 500 is integrally formed with the turntable 100, and the main blade 500 is plate-shaped, extending along the radial direction of the turntable 100, that is, a plurality of main blades 500 are radially arranged along the circumference of the main shaft 200. Driven by the main shaft 200, the main blade 500 rotates and generates suction, so that water can be sucked into the inner cavity of the drainage pump 1000, and further thrown out of the impeller 10. In this embodiment, the main blade 500 can be set to three, four or more, and the angle formed between two adjacent long blades can be the same or different, which is not limited in this embodiment.

[0057] Reference Figure 2 and Figure 7 As shown, in the embodiment of the utility model, the guide ring 400 is arranged around the outer periphery of the rotating disk 100, and the guide ring 400 is fixedly connected to the peripheral wall of the rotating disk 100. Specifically, the guide ring 400 is integrally formed with the rotating disk 100. In this embodiment, the guide ring 400 is arranged on the outer side of the main blade 500, and is spaced apart from the end of the main blade 500 away from the main shaft 200, so that the water discharged from the impeller 10 (that is, the water thrown out by the main blade 500) is blocked by the guide ring 400 to reduce the flow rate before hitting the inner wall of the drainage pump 1000 and generating noise, thereby helping to reduce the noise generated by the impeller 10 during operation.

[0058] It can be understood that in the embodiment of the utility model, the gap formed between the main blade 500 and the guide ring 400 can further intervene in the water flow, so that more water is first blocked and decelerated by the guide ring 400, rather than being directly thrown onto the inner wall of the drainage pump 1000, which is beneficial to further reduce the noise generated by the impeller 10 during operation, making the noise reduction effect of the impeller 10 very obvious.

[0059] In an embodiment of the utility model, water flows into the water hole 130 along the water inlet blade 300 under the stirring action of the water inlet blade 300, and the water that flows into the first surface 110 through the water hole 130 flows toward the guide ring 400 along the main blade 500; the water that flows to the surface of the guide ring 400 flows along the axial direction of the main shaft 200 and in a direction away from the first surface 110, and is finally discharged from the impeller 10.

[0060] It is understandable that when the impeller 10 rotates, water or gas will continuously flow through the water inlet blades 300 and the main blades 500, and the friction and collision between the water inlet blades 300 and the main blades 500 and the water and gas will cause noise. Figure 2 , Figure 3 and Figure 4 As shown, in an embodiment of the utility model, the end faces of the main blade 500 and / or the water inlet blade 300 are provided with a convex portion 600. It can be understood that the main blade 500 has at least an end face facing the guide ring 400, an end face away from the first surface 110, and an end face exposed to the water hole 130 and facing the water hole 130; the water inlet blade 300 has at least an end face away from the second surface 120 and an end face in the radial direction of the water inlet blade 300. In one example, at least one of the end faces of the main blade 500 is provided with a convex portion 600; in another example, at least one of the end faces of the water inlet blade 300 is provided with a convex portion 600; in another example, at least one of the end faces of the main blade 500 and at least one of the end faces of the water inlet blade 300 are respectively provided with a convex portion 600. It should be noted that Figure 4 The convex portion 600 of the water inlet blade 300 is not shown in the figure. The convex portion 600 of the water inlet blade 300 can be seen in FIG. Figure 3 The main blade 500 is provided with a convex portion 600 .

[0061] Reference Figure 3 and Figure 6 As shown, in the embodiment of the utility model, the end surface is provided with at least one convex portion 600, and the at least one convex portion 600 is arranged along the width direction of the end surface. Specifically, the convex portion 600 can be provided with one, two, three or more, and this embodiment does not limit this. In this embodiment, the convex portion 600 protrudes from the end surface along the length direction of the end surface, wherein the contour line of the convex portion 600 is at least partially arc-shaped, which can be understood as the surface of the convex portion 600 is at least partially an arc surface.

[0062] It should be noted that in the prior art, the end faces of the main blade 500 and the water inlet blade 300 are planes, and their corners are non-rounded. When water or gas flows through a plane with non-rounded corners, the flow rate of the water or air flow will change suddenly, causing the water or gas to vibrate violently, generating turbulence or eddies, and then generating greater noise.

[0063] Compared with the prior art, the surface of the convex portion 600 of this embodiment is at least partially an arc surface, which can play a guiding role, allowing water or gas to flow through the main blades 500 or the water inlet blades 300 more smoothly, avoiding sudden changes in the flow rate of the water flow or air flow, thereby reducing the friction and collision between the impeller 10 and the water and gas, reducing the possibility of generating turbulence or eddies during operation, and thereby reducing the generation of noise.

[0064] Reference Figure 3 and Figure 6 As shown, in the embodiment of the utility model, the end surface is protruded to form a convex portion 600, and the convex portion 600 can be arranged at one end of the end surface along its width direction, or at the center position of the end surface along its width direction, which is not limited in this embodiment. In this embodiment, the convex portion 600 is provided with a first fillet 610 at both ends along the width direction of the end surface, and in addition, the end surface is provided with a second fillet 620 at both ends along the width direction. It can be understood that compared with the non-rounded end surface corners of the main blade 500 and the water inlet blade 300, the first fillet 610 and the second fillet 620 can play a role in guiding flow.

[0065] Specifically, when water or gas flows through the main blades 500 or the water inlet blades 300, the setting of the first rounded corners 610 and the second rounded corners 620 can avoid sudden changes in the flow rate of the water flow or air flow, allowing the water or gas to flow through the main blades 500 or the water inlet blades 300 more smoothly, thereby reducing the friction and collision between the impeller 10 and the water and gas, reducing the possibility of generating turbulence or eddies during operation, and thereby reducing the generation of noise.

[0066] Reference Figure 6 As shown, in the embodiment of the utility model, the convex portion 600 and the end face are transitionally connected by an arc surface. When water or gas flows through the connection between the convex portion 600 and the end face, the setting of the arc surface can make the water or gas flow more smoothly, avoiding the connection between the convex portion 600 and the end face being non-rounded so as to cause a sudden change in the flow rate of the water flow or air flow, thereby reducing the possibility of noise generated at the connection between the convex portion 600 and the end face.

[0067] Reference Figure 8 , Fig. 9 and Fig.10As shown, in the embodiment of the utility model, the end surface is protruded to form a plurality of convex parts 600, and the plurality of convex parts 600 are arranged side by side along the width direction of the end surface. The convex parts 600 may be provided in three, four, six or more numbers, which is not limited in the present embodiment. In the present embodiment, the outer contour of the top of each convex part 600 is an arc surface. Specifically, the contour line of the top of the convex part 600 may be an irregular arc line, a superior arc or an inferior arc, or a semicircle, which is not limited in the present embodiment. An arc surface is provided between two adjacent convex parts 600, and the two ends of the arc surface are respectively connected to two adjacent convex parts 600. Based on this, the contour line formed by the plurality of convex parts 600 may be wavy.

[0068] It can be understood that when water or gas flows through the main blades 500 or the water inlet blades 300, the continuous curved surface can avoid sudden changes in the flow rate of the water flow or air flow, allowing the water or gas to flow through the main blades 500 or the water inlet blades 300 more smoothly, reducing the possibility of generating eddies and turbulence, thereby reducing the friction and collision between the impeller 10 and the water and gas, reducing the possibility of generating turbulence or eddies during operation, and thus reducing the generation of noise.

[0069] Reference Figure 2 and Figure 5 As shown, in the embodiment of the utility model, all the main blades 500 are first blades 510 of uniform specifications, each first blade 510 is connected to the main shaft 200, and the gap between each first blade 510 and the guide ring 400 is the same in size. Each first blade 510 is extended in different directions along the radial direction of the rotating disk 100 to present a radial arrangement. Figure 1 As shown, the end surface of the first blade 510 includes a first end surface 511 facing the guide ring 400, and the first end surface 511 is located at an end of the first blade 510 away from the main axis 200; the end surface of the first blade 510 also includes a second end surface 512 away from the first surface 110, and the second end surface 512 is located at the top of the first blade 510 and faces the water outlet side of the water hole 130 like the first surface 110.

[0070] Reference Figure 4 As shown, in the embodiment of the utility model, the end surface of the first blade 510 also includes a third end surface 513 facing the water hole 130. It can be understood that since the water hole 130 is provided at the center of the rotating disk 100, part of the first blade 510 will be suspended from the water hole 130. Based on this, the part of the first blade 510 exposed in the water hole 130 has the third end surface 513 facing the water hole 130.

[0071] In the embodiment of the present invention, the convex portion 600 is formed on at least one of the first end surface 511, the second end surface 512 and the third end surface 513. Specifically, in one example, the convex portion 600 is formed on the first end surface 511, the second end surface 512 or the third end surface 513. For example, referring to Figure 3 and Figure 6 As shown, the protrusion 600 is formed on the first end face 511; in another example, the protrusion 600 is formed on the first end face 511 and the second end face 512, the first end face 511 and the third end face 513, or the second end face 512 and the third end face 513; in another example, the protrusion 600 is formed on the first end face 511, the second end face 512 and the third end face 513.

[0072] Reference Figure 2 and Figure 7 As shown, in the embodiment of the utility model, a part of the plurality of main blades 500 is a first blade 510, and another part is a second blade 520, and the plurality of first blades 510 and the plurality of second blades 520 are arranged alternately along the circumferential direction of the main shaft 200. It should be noted that at least one second blade 520 is arranged between two adjacent first blades 510, and the end of the second blade 520 close to the main shaft 200 is spaced from the main shaft 200, and the end away from the main shaft 200 is spaced from the guide ring 400. Along the radial direction of the main shaft 200, the length of the first blade 510 is greater than the length of the second blade 520, so that the noise generated by the impeller 10 during operation can be further reduced.

[0073] In the embodiment of the utility model, at least one of the first blade 510 and the second blade 520 is provided with a convex portion 600, wherein the second blade 520 has at least an end face facing the guide ring 400, an end face away from the first surface 110, and an end face facing the main shaft 200. Specifically, in one example, at least one of the end faces of the first blade 510 is provided with a convex portion 600; in another example, at least one of the end faces of the second blade 520 is provided with a convex portion 600; in another example, at least one of the end faces of the first blade 510 and at least one of the end faces of the second blade 520 are respectively provided with a convex portion 600.

[0074] Specifically, refer to Figure 2 and Figure 7As shown, in an embodiment of the utility model, the end face of the second blade 520 includes a fourth end face 521 facing the guide ring 400, and the fourth end face 521 is located at an end of the second blade 520 away from the main shaft 200; the end face of the second blade 520 also includes a fifth end face 522 away from the first surface 110, and the fifth end face 522 is located at the top of the second blade 520 and faces the water outlet side of the water hole 130 like the first surface 110; the end face of the second blade 520 also includes a sixth end face 523 facing the main shaft 200, and the sixth end face 523 is located at an end of the second blade 520 close to the main shaft 200.

[0075] In the embodiment of the utility model, the convex portion 600 is formed on at least one of the first end surface 511, the second end surface 512, the third end surface 513, the fourth end surface 521, the fifth end surface 522 and the sixth end surface 523. Specifically, taking the second blade 520 provided with the convex portion 600 as an example, in one example, the convex portion 600 is formed on the fourth end surface 521, the fifth end surface 522 or the sixth end surface 523; in another example, the convex portion 600 is formed on the fourth end surface 521 and the fifth end surface 522, on the fourth end surface 521 and the sixth end surface 523, or on the fifth end surface 522 and the sixth end surface 523; in another example, the convex portion 600 is formed on the fourth end surface 521, the fifth end surface 522 and the sixth end surface 523.

[0076] In the embodiment of the utility model, the gap formed between the first blade 510 and the guide ring 400 and the gap formed between the second blade 520 and the guide ring 400 may be the same or different. Specifically, the gap formed between the first blade 510 and the guide ring 400 is a, and the gap formed between the second blade 520 and the guide ring 400 is b. Fig.11 As shown, in one example, it satisfies: a=b; refer to Figure 5 As shown, in another example, a<b is satisfied.

[0077] It should be noted that due to considerations on the structure of the drain pump 1000, its interior is usually in a two-phase state where gas and water coexist, and there is a relatively obvious dividing line between water and gas. When the drain pump 1000 cannot draw water from the air conditioner water tray, that is, the water level in the water tray is lower than the inhalable water level of the drain pump 1000, and the pump continues to work, due to the rotation of the pump, the drain pipe connected to the drain pump 1000 continues to maintain a certain drainage height but cannot discharge water. At this time, the water and gas inside the pump reach a relatively balanced state, which is referred to as "critical". In the critical state, when the drainage height is low, peak noise will appear at a certain drainage height, and this peak noise has become an industry pain point. Specifically, in the critical state, the interface between water and gas is roughly located at the outer edge of the turntable 100.

[0078] To this end, in the embodiment of the utility model, the first end face 511 and the fourth end face 521 are respectively provided with a convex portion 600. It can be understood that the first end face 511 and the fourth end face 521 are the parts of the first blade 510 and the second blade 520 that are mainly in contact with the interface between water and air. The first end face 511 and the fourth end face 521 are respectively provided with the convex portion 600, which can make the water and gas flow through the first blade 510 and the second blade 520 more smoothly, avoiding sudden changes in the flow rate of the water flow or air flow, and thereby reducing the generation of noise at the interface between water and air.

[0079] Reference Figure 4 , Figure 5 and Fig. 9 As shown, in the embodiment of the utility model, the turntable 100 is provided with a plurality of through holes 140, and the size and shape of each through hole 140 can be the same or different, and the present application does not limit this. Along the circumference of the turntable 100, the plurality of through holes 140 are arranged alternately with the plurality of first blades 510 and the plurality of second blades 520. Specifically, at least one through hole 140 is provided between adjacent first blades 510 and second blades 520. It can be understood that the through hole 140 passes through the turntable 100 along the axial direction of the main shaft 200. When the impeller 10 is assembled on the drainage pump 1000, the through hole 140 can connect the inner side and the outer side of the drainage pump 1000, so that the air pressure inside and outside can be balanced.

[0080] Specifically, when water and air are sucked into the impeller 10 together, the air can be discharged through the through hole 140, thereby balancing the pressure difference between the inside and outside of the impeller 10, reducing the axial force, and further reducing the vibration of the impeller 10 caused by the pressure difference during operation, and further reducing the noise generated by the impeller 10 during operation.

[0081] In addition, the through hole 140 of the present embodiment is opened on the turntable 100, and the bottom of the first blade 510 and the second blade 520 are fixed to the turntable 100, so that the water throwing direction of the first blade 510 and the second blade 520 is perpendicular to the axial direction of the through hole 140. It is difficult for the water thrown out by the first blade 510 to directly enter the through hole 140, so that the whistling sound caused by the rapid passage of the gas-liquid mixture through the small hole or slit will not be generated, which is beneficial to further reduce the noise generated by the impeller 10 during operation.

[0082] Reference Figure 4 , Figure 5 and Fig. 9As shown, in the embodiment of the utility model, the through hole 140 is arranged at the outer edge of the turntable 100, that is, the position of the turntable 100 near the guide ring 400. It can be understood that the bubbles in the impeller 10 move with the water flow. Under the action of the first blade 510, the water flow speed at the outer edge of the turntable 100 is faster, and the bubbles are easier to discharge. Therefore, setting the through hole 140 at the outer edge of the turntable 100 can improve the air discharge efficiency, which is conducive to reducing the noise generated by the impeller 10 during operation. In this embodiment, the aperture of the through hole 140 can be set according to the water flow speed. Specifically, the larger the water flow speed, the larger the aperture can be set. The cross-sectional shape of the through hole 140 can be elliptical, rectangular, triangular, rhombus, trapezoidal or waist-shaped, etc., and this application is not limited to this.

[0083] Reference Figure 2 , Figure 4 and Figure 7 As shown, in the embodiment of the utility model, the water inlet blade 300 is fixedly connected to the main shaft 200 and is coaxially arranged with the main shaft 200. The water inlet blade 300 includes a plurality of third blades 310 arranged along the circumference of the main shaft 200. During use, the plurality of third blades 310 are immersed in water together with the water suction port of the drainage pump 1000, and the plurality of third blades 310 lift and suck the water into the water hole 130 by stirring the water. In this embodiment, the end surface of the third blade 310 includes a seventh end surface 311 away from the second surface 120 and an eighth end surface 312 away from the central axis of the main shaft 200.

[0084] It can be understood that the seventh end face 311 and the eighth end face 312 are the parts of the third blade 310 that are mainly in contact with water or gas. The seventh end face 311 and the eighth end face 312 are respectively provided with convex portions 600, which can make water and gas flow through the third blade 310 more smoothly, avoid sudden changes in the flow rate of the water flow or air flow, thereby reducing the friction and collision between the water inlet blade 300 and the water or gas, reducing the possibility of generating turbulence or eddy currents during operation, and thereby reducing the generation of noise.

[0085] In the embodiment of the utility model, the convex portion 600 is formed on at least one of the eighth end surface 312 of the third blade 310 away from the central axis of the main shaft 200 and the seventh end surface 311 of the third blade 310 away from the second surface 120. Specifically, in one example, the seventh end surface 311 or the eighth end surface 312 is provided with the convex portion 600; in another example, the seventh end surface 311 and the eighth end surface 312 are respectively provided with the convex portion 600.

[0086] Reference Figure 6As shown, in the embodiment of the present invention, the height of the protrusion 600 protruding from the end surface is h, and the width of the end surface is L. It is understandable that the inventors learned during the experiment that if the height of the protrusion 600 protruding from the end surface is too large or too small, the flow guiding effect of the protrusion 600 will decrease. Therefore, in this embodiment, h=(0.2~3)L is satisfied. Figure 6 It can be understood that the height h of the protrusion 600 protruding from the end surface can be 0.2-3 times the width L of the end surface. For example, the height h of the protrusion 600 protruding from the end surface is 1.5 times the width L of the end surface. In addition, the width of the protrusion 600 is w, and in this embodiment, w≤L is satisfied.

[0087] Reference Fig.12 As shown, in the embodiment of the utility model, the guide part 630 includes a plurality of mutually connected protrusions 600. It is understandable that the inventors learned during the experiment that if the height of the guide part 630 protruding from the end surface is too large or too small, the guide effect of the guide part 630 will decrease. Therefore, in the embodiment, the height of the guide part 630 protruding from the end surface is H, which satisfies: H = (0.2~3) L. Fig.12 It can be understood that the height H of the guide portion 630 protruding from the end surface can be 0.2-3 times the width L of the end surface. For example, the height H of the guide portion 630 protruding from the end surface is 1.5 times the width L of the end surface. In addition, the width of the guide portion 630 is W. In this embodiment, W≤L is satisfied.

[0088] Reference Figure 2 and Figure 7 As shown, in the embodiment of the utility model, the end face of the guide ring 400 away from the turntable 100 is the ninth end face 410. In this embodiment, the ninth end face 410 is provided with a convex portion 600. It can be understood that the convex portion 600 provided on the ninth end face 410 can play a guiding role, so that water or gas flows through the guide ring 400 more stably, avoiding a sudden change in the flow rate of the water flow or air flow passing through the guide ring 400, thereby reducing the friction and collision between the guide ring 400 and the water or gas, and further reducing the noise generated by the guide ring 400.

[0089] The embodiment of the utility model also proposes a drainage pump 1000, which can be used in electrical appliances with drainage requirements such as air conditioner indoor units, washing machines, dishwashers, etc., and the present application does not limit this. In this embodiment, the drainage pump 1000 includes a housing 101, a pump cover 102, a motor 103 and an impeller 10 of the above embodiment, wherein the housing 101 is provided with an installation cavity 1011; the pump cover 102 is connected to the housing 101 and forms a drainage cavity 1021 with the housing 101, and the pump cover 102 is provided with a water inlet 1022 and a water outlet 1023 connected to the drainage cavity 1021; the motor 103 is arranged in the installation cavity 1011, and the rotating shaft 1031 of the motor 103 extends from the installation cavity 1011 into the drainage cavity 1021; the impeller 10 is arranged in the drainage cavity 1021, the main shaft 200 is connected to the rotating shaft 1031, and the water inlet blade 300 is arranged toward the water inlet 1022.

[0090] The drainage pump 1000 of this embodiment adopts the impeller 10 of the above-mentioned embodiment. By optimizing the structure of the impeller 10, the end face of at least one of the main blades 500 and the water inlet blades 300 is provided with a convex portion 600. The convex portion 600 is provided with at least one and is arranged along the width direction of the end face. The contour line of the convex portion 600 is at least partially arc-shaped. Compared with the flat end faces of the main blades 500 and the water inlet blades 300, the setting of the convex portion 600 can play a role in guiding flow, allowing water or gas to flow more smoothly, thereby reducing the friction and collision between the impeller 10 and the water and gas, and reducing the possibility of turbulence or eddy currents in the impeller 10 during the operation of the drainage pump 1000, thereby reducing the generation of noise, which not only effectively reduces the vibration of the drainage pump 1000, but also can reduce the noise level of the drainage pump 1000.

[0091] Since the drainage pump 1000 adopts all the technical solutions of the impeller 10 of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here.

[0092] The embodiment of the utility model further provides an air conditioner, comprising a water receiving pan and the drainage pump 1000 of the above embodiment, wherein the water receiving pan is used to collect condensed water, and the water inlet 1022 of the drainage pump 1000 is connected to the water receiving pan, so that the condensed water in the water receiving pan can be discharged. Specifically, the air conditioner in this embodiment can be a mobile air conditioner, or an air conditioning device such as an air conditioner indoor unit, which is not limited in this embodiment.

[0093] The air conditioner of this embodiment adopts the drain pump 1000 of the above embodiment. Since the impeller 10 in the drain pump 1000 is structurally optimized, not only the vibration of the drain pump 1000 is reduced, but also the noise generated by the drain pump 1000 is reduced, thereby improving the stability of the air conditioner and reducing the overall noise level of the air conditioner, providing users with a better user experience.

[0094] Since the air conditioner adopts all the technical solutions of the drainage pump 1000 of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here.

[0095] Of course, the present invention is not limited to the above-mentioned embodiments, and technicians familiar with the field may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An impeller, characterized in that: include: A rotating disk having a first surface and a second surface disposed opposite to each other, and a water hole is provided at the center of the rotating disk; A main shaft, passing through the water hole and coaxially arranged with the rotating disk; A water inlet blade, arranged at the water inlet side of the water hole and connected to the main shaft; A guide ring, arranged around the outer periphery of the rotating disk; A plurality of main blades are connected to the first surface, the plurality of main blades are radially arranged along the circumference of the main shaft, and ends of the main blades away from the main shaft are spaced apart from the guide ring; Wherein, the end surface of the main blade and / or the water inlet blade is provided with a convex portion, the convex portion is arranged along the length direction of the end surface, and at least one convex portion is arranged along the width direction of the end surface, and the contour line of the convex portion is at least partially arc-shaped.

2. The impeller according to claim 1, characterized in that: The end surface is provided with a convex portion, and along the width direction of the end surface, two ends of the convex portion are respectively provided with first rounded corners, and two ends of the end surface are respectively provided with second rounded corners.

3. The impeller according to claim 1, characterized in that: The end surface is provided with a plurality of the convex parts, and two adjacent convex parts are connected by an arc-shaped transition surface, and the outer contour of each convex part is an arc-shaped surface.

4. The impeller according to claim 1, characterized in that: The main blade is a first blade, which is connected to the main shaft. The end face of the first blade includes a first end face facing the guide ring, a second end face away from the first surface, and a third end face facing the water hole. The convex portion is formed on at least one of the first end face, the second end face, and the third end face.

5. The impeller according to claim 1, characterized in that: A portion of the plurality of main blades are first blades, and another portion are second blades. The plurality of first blades and the plurality of second blades are staggeredly arranged along the circumferential direction of the main shaft. Along the radial direction of the main shaft, the length of the first blade is greater than the length of the second blade. The first blade is connected to the main shaft, and the second blade is spaced apart from the main shaft. At least one of the first blade and the second blade is provided with the convex portion.

6. The impeller according to claim 5, characterized in that The end surface of the first blade includes a first end surface facing the guide ring, a second end surface away from the first surface, and a third end surface facing the water hole; the end surface of the second blade includes a fourth end surface facing the guide ring, a fifth end surface away from the first surface, and a sixth end surface facing the main axis; the convex portion is formed on at least one of the first end surface, the second end surface, the third end surface, the fourth end surface, the fifth end surface, and the sixth end surface.

7. The impeller according to claim 1, characterized in that The water inlet blade is coaxially arranged with the main shaft, and the water inlet blade includes a plurality of third blades arranged circumferentially along the main shaft, and the convex portion is formed on at least one of the end surface of the third blade away from the central axis of the main shaft and the end surface of the third blade away from the second surface.

8. The impeller according to claim 2, characterized in that: The height of the convex portion protruding from the end surface is 0.2 to 3 times the width of the end surface, and along the width direction of the end surface, the width of the convex portion is less than or equal to the width of the end surface.

9. The impeller according to claim 3, characterized in that: A plurality of the protrusions form a guide portion, the height of the guide portion protruding from the end face is 0.2 to 3 times the width of the end face, and along the width direction of the end face, the width of the guide portion is less than or equal to the width of the end face.

10. The impeller according to claim 1, characterized in that The convex portion is provided on the end surface of the guide ring away from the rotating disk.

11. A drainage pump, characterized in that: include: A housing having a mounting cavity therein; A pump cover connected to the housing and forming a drainage cavity with the housing, wherein the pump cover is provided with a water inlet and a water outlet communicating with the drainage cavity; A motor is disposed in the installation cavity, and a rotating shaft of the motor extends from the installation cavity into the drainage cavity; The impeller according to any one of claims 1 to 10, wherein the impeller is arranged in the drainage chamber, the main shaft is connected to the rotating shaft, and the water inlet blades are arranged toward the water inlet.

12. An air conditioner, characterized in that: Includes the drainage pump as claimed in claim 11.

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