Impeller, draining pump and air conditioner

Abstract

The impeller comprises a rotating disc, a main shaft, a flow guide ring, a water inlet blade and a plurality of main blades, the rotating disc is provided with a first surface and a second surface which are arranged back to back, and a water passing hole penetrating through the first surface and the second surface is formed in the center of the rotating disc. The main shaft penetrates through the water passing hole and is coaxial with the rotary disc, the flow guide ring surrounds the peripheral edge of the rotary disc, the multiple main blades are connected to the first surface and are distributed in a radial mode in the circumferential direction of the main shaft, multiple through holes penetrating through the first surface and the second surface are formed in the outer edge of the rotary disc, and the multiple through holes are distributed in the circumferential direction of the rotary disc at intervals. The axes of the through holes incline from the second surface to the first surface in the rotating direction of the rotating disc, when water flow passes through the through holes from the second surface to the first surface, the water flow enters the rotating disc along the inner walls of the through holes, the through holes have the flow guiding effect, the phenomenon that the water flow impacts the inner walls of the through holes can be improved, and therefore noise is 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. The condensed water will gather in the water collection pan and be discharged through the drain pump. There is water and gas inside the drain pump at the same time, and there is a relatively obvious water-gas boundary between the water and gas. When the water level in the water collection pan is lower than the inhalable water level of the drain pump, the drain pump cannot absorb the condensed water in the water collection pan. Since the drain pump continues to operate, the drain pipe connected to the drain pump will maintain a certain drainage height but will not discharge water. At this time, the water and gas inside the drain pump reach a relatively balanced state, which is referred to as the "critical state". When the water and gas inside the drain pump are in a critical state and the drainage height of the drain pipe is low, peak noise will appear at a certain drainage height, which has become a pain point in the industry.

[0003] In the related art, in order to reduce noise, through holes are arranged on the turntable of the impeller, and the through holes can discharge the bubbles in the drainage pump. However, when water flows through the through holes from bottom to top, the water flows will hit the inner wall of the through holes, thereby generating noise. Utility Model Content

[0004] 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 that can improve the problem of noise generated by water flow hitting the inner wall of the through hole.

[0005] The utility model also provides a drainage pump with the impeller.

[0006] The utility model also provides an air conditioner with the drainage pump.

[0007] The impeller according to the first aspect of the present invention comprises: a turntable having a first surface and a second surface arranged back to back, a water hole penetrating the first surface and the second surface being provided at the center of the turntable; a main shaft passing through the water hole and being coaxially arranged with the turntable; a guide ring arranged around the outer circumference of the turntable; water inlet blades arranged on the water inlet side of the water hole and connected to the main shaft; a plurality of main blades, all connected to the first surface, the plurality of main blades being radially arranged along the circumference of the main shaft; wherein the outer edge of the turntable is provided with a plurality of through holes penetrating the first surface and the second surface, the plurality of through holes being arranged at intervals along the circumference of the turntable, and the axis of the through hole is inclined from the second surface to the first surface along the rotation direction of the turntable.

[0008] The impeller according to the first embodiment of the utility model has at least the following beneficial effects: a plurality of main blades are arranged radially along the circumference of the main shaft, and the water entering the impeller from the water hole can be discharged from the impeller under the guidance of the main blades. By arranging through holes on the outer edge of the turntable, and setting the axis of the through holes to be inclined from the second surface to the first surface along the rotation direction of the turntable, the inner wall of the through hole can be roughly along the flow direction of the water flow. When the water flows through the through holes from bottom to top, the water flows along the inner wall of the through holes into the turntable. The through holes play a guiding effect, which can improve the phenomenon of water flow hitting the inner wall of the through holes, thereby reducing noise. In addition, the through holes can also discharge bubbles at the water-gas boundary position, so that the main blades are not easy to break the bubbles, further reducing noise.

[0009] According to some embodiments of the present invention, the angle between the axis of the through hole and the axis of the main shaft is greater than or equal to 5° and less than or equal to 60°.

[0010] According to some embodiments of the present invention, along the circumference of the rotating disk, the plurality of through holes and the plurality of main blades are arranged alternately.

[0011] According to some embodiments of the utility model, the plurality of main blades are divided into a plurality of first blades and a plurality of second blades, the plurality of first blades and the plurality of second blades are alternately arranged along the circumference of the turntable, 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, the second blade is spaced apart from the main shaft, and the position of the through hole in the circumferential direction of the turntable is between adjacent first blades and second blades.

[0012] According to some embodiments of the utility model, the end of the main blade away from the main shaft is spaced apart from the guide ring, and along the radial direction of the turntable, the through hole is arranged closer to the guide ring than the first blade.

[0013] According to some embodiments of the present invention, the minimum distance between the first blade and the guide ring is less than or equal to the minimum distance between the second blade and the guide ring.

[0014] According to some embodiments of the present invention, there are multiple water inlet blades, and the multiple water inlet blades are arranged along the circumferential direction of the main shaft and extend along the axial direction of the main shaft.

[0015] According to some embodiments of the present utility model, the end of the main blade away from the main shaft is spaced apart from the guide ring, and the end surface of the main blade facing the guide ring is constructed as a cambered surface.

[0016] According to the drainage pump of the second aspect embodiment of the utility model, it includes: a shell, which is provided with an installation cavity; a pump cover, which is connected to the shell and forms a drainage cavity with the shell, and the pump cover is provided with a water inlet and a water outlet connected to the drainage cavity; a motor, which is arranged in the installation cavity, and the rotating shaft of the motor extends from the installation cavity into the drainage cavity; the impeller of the first aspect embodiment, 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.

[0017] The drainage pump according to the embodiment of the second aspect of the utility model has at least the following beneficial effects: the drainage pump adopts the impeller of the embodiment of the first aspect, and the structure of the impeller is optimized so that the axis of the through hole is inclined from the second surface to the first surface along the rotation direction of the turntable. When water flows through the through hole from the second surface to the first surface, the water flows along the inner wall of the through hole into the turntable. The through hole has a diversion effect, which can improve the phenomenon of water flow hitting the inner wall of the through hole and reduce the noise generated by the drainage pump.

[0018] An air conditioner according to an embodiment of the third aspect of the utility model comprises the drainage pump of the embodiment of the second aspect.

[0019] The air conditioner according to the third aspect embodiment of the utility model has at least the following beneficial effects: since the impeller in the drainage pump is structurally optimized, the noise generated by the drainage pump is reduced, the stability of the air conditioner is improved, and the overall noise level of the air conditioner is reduced, providing users with a better usage experience.

[0020] 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

[0021] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 It is a schematic diagram of the structure of the impeller of some embodiments of the utility model;

[0023] Figure 2 It is a cross-sectional view of the impeller of some embodiments of the utility model;

[0024] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0025] Figure 4 It is a schematic diagram of the structure of the impeller of some embodiments of the utility model;

[0026] Figure 5 A top view of an impeller of some embodiments of the utility model;

[0027] Figure 6 A top view of an impeller of some embodiments of the utility model;

[0028] Figure 7 It is a schematic diagram of the structure of the impeller of some embodiments of the utility model;

[0029] Figure 8 It is a schematic diagram of the structure of the impeller of some embodiments of the utility model;

[0030] Fig. 9 It is a cross-sectional view of a drainage pump according to some embodiments of the present invention.

[0031] Reference numerals:

[0032] Drain pump 1000;

[0033] Impeller 100, rotating disk 110, first surface 111, second surface 112, water hole 113, through hole 114, main shaft 120, guide ring 130, outer peripheral surface 131, inner peripheral surface 132, main blade 140, first blade 141, second blade 142, arc surface 143, water inlet blade 150;

[0034] Housing 200, mounting cavity 210;

[0035] Pump cover 300, drainage cavity 310, water inlet 311, water outlet 312;

[0036] Motor 400 and rotating shaft 410 . DETAILED DESCRIPTION

[0037] 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.

[0038] In the description of the present invention, it should be understood that the descriptions involving orientations, such as upper, lower, circumferential, radial, 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.

[0039] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used 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.

[0040] 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.

[0041] Reference Figure 1 As shown, the impeller 100 of an embodiment of the utility model is mainly used in the drainage pump of the air conditioner, and the drainage pump is used to discharge the condensed water in the water receiving tray. The impeller 100 includes a turntable 110, a main shaft 120, a guide ring 130, a water inlet blade 150 and a plurality of main blades 140. The turntable 110 can be understood as a disc structure, and the turntable 110 has a first surface 111 and a second surface 112 that are arranged back to back to each other, the first surface 111 is arranged upward, and the second surface 112 is arranged downward. It can also be understood that the first surface 111 and the second surface 112 are arranged opposite to each other, and the first surface 111 and the second surface 112 can be planes, inclined surfaces or curved surfaces. The turntable 110 is provided with a water hole 113 which passes through the first surface 111 and the second surface 112. The water hole 113 is located at the center of the turntable 110. The water hole 113 has a water inlet side and a water outlet side. The water inlet side is located below the turntable 110, and the water outlet side is located above the turntable 110. The water hole 113 is used for water flow or air flow to pass from bottom to top.

[0042] Specifically, refer to Figure 1As shown, the main shaft 120 is used to connect with the output shaft of the motor. The main shaft 120 is vertically arranged and penetrates the water hole 113. The main shaft 120 is coaxially arranged with the turntable 110. It can be understood that the rotation axis of the main shaft 120 coincides with the rotation axis of the turntable 110. The aperture of the water hole 113 is larger than the shaft diameter of the main shaft 120. Therefore, the gap formed between the inner wall of the water hole 113 and the outer peripheral wall of the main shaft 120 can allow water to flow through. The water inlet blade 150 is arranged on the water inlet side of the water hole 113. The water inlet blade 150 is located below the turntable 110. The water inlet blade 150 is connected to the main shaft 120. The water inlet blade 150 extends along the axial direction of the main shaft 120. The water inlet blade 150 also extends along the radial direction of the main shaft 120. In actual use, the water inlet blade 150 will be immersed in the condensed water in the water receiving tray. The plurality of main blades 140 are all connected to the first surface 111, and the plurality of main blades 140 are radially arranged along the circumference of the main shaft 120, and the main blades 140 extend along the radial direction of the main shaft 120. The guide ring 130 is an annular structure, specifically a circular ring structure, and the guide ring 130 has an outer peripheral surface 131 and an inner peripheral surface 132. The guide ring 130 is arranged around the outer peripheral edge of the rotating disk 110, and the guide ring 130 extends upward. It can be understood that the guide ring 130 surrounds the plurality of main blades 140, and the height of the guide ring 130 is greater than the height of the main blades 140. There is a gap between the end of the main blade 140 away from the main shaft 120 and the guide ring 130.

[0043] When the impeller 100 is working, the motor drives the main shaft 120 to rotate, and the main shaft 120 drives the main blades 140, the water inlet blades 150 and the turntable 110 to rotate synchronously, and a negative pressure is generated on the water inlet side of the water hole 113. Since the water inlet blades 150 are immersed in the condensed water in the water receiving tray, the water flow or air flow will flow upward along the surface of the water inlet blades 150, and the water inlet blades 150 play a drainage role. The water flow or air flow passes through the water hole 113 from bottom to top, and flows out of the water outlet side of the water hole 113 and enters the turntable 110. Since the main blades 140 and the turntable 110 rotate synchronously, during the rotation process, the main blades 140 will guide the water flow or air flow in the turntable 110 from the center position of the turntable 110 to the edge position of the turntable 110, and the water flow or air flow It will flow to the position of the guide ring 130. It can also be understood that the main blade 140 throws the water flow or air flow on its surface to the guide ring 130. Since the guide ring 130 extends upward and has an inner circumferential surface 132, the inner circumferential surface 132 of the guide ring 130 will block the water flow, and the water flow follows the guide ring 130 to make a circular motion. Gradually, as the accumulated water flow increases, the water flow will gradually move upward along the inner circumferential surface 132 of the guide ring 130. When the position of the water flow is higher than the height of the guide ring 130, the water flow will eventually radially outwardly separate from the guide ring 130 and flow out of the impeller 100, thereby completing the drainage. The water flow first reduces its flow velocity at the guide ring 130 and then is discharged from the guide ring 130, which can prevent the water flow from directly hitting the inner wall of the drainage pump and generating noise.

[0044] It should be noted that there are both water and gas inside the impeller 100. When the turntable 110 rotates, due to the greater mass of water and the centrifugal force, the water is generally located near the edge of the turntable 110, and a water-gas boundary is formed between the water and the gas, and a water flow surface is formed at the water-gas boundary. When the water level in the water receiving tray is lower than the inhalable water level of the drainage pump, due to the continuous operation of the drainage pump, the drainage pipe connected to the drainage pump will maintain a certain drainage height but will not discharge water. At this time, the water and gas inside the impeller 100 reach a relatively balanced state, which is referred to as the "critical state".

[0045] Specifically, under the critical state, the water vapor boundary line will stabilize at the edge of the turntable 110. Since the main blade 140 and the guide ring 130 are arranged at intervals, it can be understood that the water vapor boundary line is located between the guide ring 130 and the main blade 140. Viewed from the side, the water vapor boundary line is a parabola. When the main blade 140 rotates, it will interact with the water vapor boundary line. It can be understood that the main blade 140 will stir the water vapor boundary line toward the end of the guide ring 130, and the main blade 140 will scrape the water flow surface at the water vapor boundary line, thereby forming bubbles. Alternatively, it can also be understood that a water-gas interface is formed between the water and gas inside the impeller 100, the water-gas interface is a roughly annular curved surface, the water-gas interface surrounds the rotating disk 110, and the cross-sectional contour line of the water-gas interface is the above-mentioned water-gas dividing line. It should be noted that the water-gas interface is not necessarily evenly distributed between the main blades 140 and the guide ring 130, and a part of the water-gas interface may intersect with a main blade 140. When the water and gas inside the drainage pump are in a critical state and the drainage height of the drainage pipe is low, peak noise will appear at a certain drainage height. The structure of the impeller 100 needs to be optimized for this working condition to reduce the noise of the drainage pump.

[0046] Based on this, refer to Figure 1 and Figure 3As shown, a through hole 114 penetrating the first surface 111 and the second surface 112 is provided at the outer edge or the edge of the rotating disk 110. It can be understood that the through hole 114 connects the upper side and the lower side of the rotating disk 110, and the aperture of the through hole 114 is smaller than the aperture of the water hole 113. The position of the through hole 114 corresponds to the position of the water vapor boundary line. It can be understood that the through hole 114 is located below the water vapor boundary line. The through hole 114 can discharge the bubbles at the water vapor boundary line and transfer the bubbles to the external impeller 100, so that the main blade 140 is not easy to break the bubbles, which can reduce noise. In addition, the through hole 114 can also allow water to pass through. The water flow can pass through the through hole 114 from bottom to top, and can also pass through the through hole 114 from top to bottom, so that the water pressure or air pressure acting on the first surface 111 and the second surface 112 are relatively close, which plays a role in balancing pressure, reducing the noise generated by the water flow or air flow hitting the impeller 100, and reducing the vibration of the impeller 100 caused by the pressure difference during operation. For example, when the water pressure acting on the first surface 111 or the second surface 112 is relatively large, water may flow through the through holes 114 due to the water pressure difference between the first surface 111 and the second surface 112 , thereby balancing the water pressure.

[0047] It should be noted that in the related art, the axis X1 of the through hole 114 is set vertically, and when water flows through the through hole 114, it will directly hit the inner wall of the through hole 114, thereby generating noise. The through hole 114 can be further optimized to improve the problem of noise generated by water flowing into the inner wall of the through hole 114.

[0048] Specifically, refer to Figure 2 and Figure 3 As shown, at the position of the through hole 114, the axis X1 of the through hole 114 is inclined from the second surface 112 to the first surface 111 along the rotation direction of the turntable 110. It can also be understood that the axis X1 of the through hole 114 is inclined from bottom to top along the rotation direction of the turntable 110. It can also be understood that at the position of the through hole 114, the axis X1 of the through hole 114 is inclined from the second surface 112 to the first surface 111 toward the rotation direction of the turntable 110 or the tangential speed of the turntable 110. The rotation direction of the turntable 110 can refer to Figure 2 The rotation direction indicated in the figure is located on the circumferential surface of the turntable 110. When the water flows from the second surface 112 to the first surface 111, it can also be understood that the water flows from the bottom to the top through the through hole 114, and the water flows along the inner wall of the through hole 114. It can also be understood that the axis X1 of the through hole 114 is inclined along the flow direction of the water flow, and the inner wall of the through hole 114 is along the flow direction of the water flow, which can play a role in guiding the flow, so that the water flow is not easy to directly hit the inner wall of the through hole 114, which can reduce noise. Specifically, refer to Figure 3As shown, a simple analysis is made on the flow velocity of the water flow below the turntable 110. Since the turntable 110 drives the water flow below to perform circular motion, the water flow has a component velocity Vx, Vx is toward the rotation direction of the turntable 110, and the direction of Vx is horizontal. Vx can be understood as the tangential velocity of the water flow. Since the water flow moves from bottom to top, the water flow has a component velocity Vy, and the direction of Vy is vertically upward. According to the parallelogram rule, Vx can be combined with Vy to form a combined velocity V, and the direction of V is the same or approximately the same as the axis X1 of the through hole 114, so that when the water flow passes through the through hole 114, the water flow flows along the inner wall of the through hole 114, and the water flow does not directly hit the inner wall of the through hole 114.

[0049] In addition, it should be noted that when the main blade 140 rotates, the water on its surface will be thrown out radially. Since the through hole 114 is located below the main blade 140, the water thrown out by the main blade 140 will not directly enter the through hole 114, and thus the water flow or air flow will not quickly pass through the through hole 114 to produce a sharp whistle sound, which is beneficial to further reduce the noise generated by the impeller 100 during operation.

[0050] It is understandable that, referring to Figure 1 As shown, in some embodiments, the number of through holes 114 is multiple, and the multiple through holes 114 are arranged at intervals along the circumference of the rotating disk 110. The multiple through holes 114 are located at the outer edge or edge, so that the through holes 114 can widely cover the above-mentioned water-gas interface, which is conducive to the discharge of bubbles at the water-gas interface. In addition, since the bubbles in the impeller 100 move with the water flow, under the stirring of the main blades 140, the water flow speed near the edge of the rotating disk 110 is faster, and the bubbles are easier to discharge. Therefore, arranging the through holes 114 at the outer edge or edge of the rotating disk 110 can improve the bubble discharge efficiency, and the bubbles can be discharged quickly, which is conducive to reducing the noise generated by the impeller 100 when working. Specifically, the multiple through holes 114 can be arranged equidistantly or unequally, and the apertures of the multiple through holes 114 can be the same or different. The cross-section of the through hole 114 can be circular, elliptical, quadrilateral or triangular.

[0051] It is understandable that, referring to Figure 2 As shown, in some embodiments, the angle between the axis X1 of the through hole 114 and the axis X2 of the main shaft 120 is greater than or equal to 5° and less than or equal to 60°. Figure 3 As shown, Figure 3 The axis X3 in Figure 2The axis X2 in the through hole 114 is parallel to each other, the angle between the axis X1 and the axis X3 is α, the angle between the axis X1 and the axis X2 is equal to α, and α satisfies: 5°≤α≤60°. α can also be understood as the angle between the axis X1 of the through hole 114 and the vertical direction. In some embodiments, preferably, α is 45°, which can make the axis X1 of the through hole 114 and the flow direction of the water flow in the through hole 114 roughly the same, and the diversion effect is better.

[0052] In some embodiments, there is a spacing between the main blade 140 and the guide ring 130, and the axis X1 of the through hole 114 can be set toward the spacing. It can also be understood that the through hole 114 is toward the spacing between the main blade 140 and the guide ring 130, and the through hole 114 is opposite to the position of the water-gas interface, which is beneficial for the through hole 114 to quickly discharge the bubbles at the water-gas interface and reduce noise.

[0053] It can be understood that, in some embodiments, when the impeller 100 rotates, the trajectory swept by a certain point on the axis X1 of the through hole 114 forms a trajectory circle, and the projection of the axis X1 of the through hole 114 on the plane where the trajectory circle is located is tangent to the trajectory circle. It can also be understood that the axis X1 of the through hole 114 is tangent to the trajectory circle, and it can also be understood that the projection has only one intersection with the trajectory circle, and it can also be understood that the shortest line segment between the axis X1 of the through hole 114 and the center of the trajectory circle is perpendicular to the axis X1 of the through hole 114. In some embodiments, when the impeller 100 rotates, the trajectory swept by a certain point on the axis X1 of the through hole 114 forms a trajectory circle, and the projection of the axis X1 of the through hole 114 on the plane where the trajectory circle is located has two intersections with the trajectory circle, and it can also be understood that the axis X1 of the through hole 114 is inclined toward the inside of the trajectory circle.

[0054] It is understandable that, referring to Figure 4 As shown, in some embodiments, the number of the water inlet blades 150 is multiple, and the multiple water inlet blades 150 are arranged at intervals along the circumference of the main shaft 120. In order to improve the drainage effect, the width of the water inlet blades 150 can gradually increase from bottom to top, and the overall transition is smooth. In some embodiments, the number of the water inlet blades 150 is four, and the four water inlet blades 150 are arranged at 90 degrees. It can be understood that the four water inlet blades 150 are arranged in a cross-shaped structure.

[0055] It is understandable that, referring to Figure 1 As shown, in some embodiments, at the circumferential position of the turntable 110, the through hole 114 is located between two adjacent main blades 140, and a plurality of through holes 114 and a plurality of main blades 140 are arranged alternately. It can also be understood that along the circumference of the turntable 110, they are arranged in sequence in the form of through hole 114-main blade 140-through hole 114-main blade 140.

[0056] It is understandable that, referring to Figure 1 As shown, in some embodiments, the plurality of main blades 140 are divided into a plurality of first blades 141 and a plurality of second blades 142, the plurality of first blades 141 and the plurality of second blades 142 are alternately arranged along the circumference of the rotating disk 110, the first blades 141 and the second blades 142 extend along the radial direction of the main shaft 120, along the radial direction of the main shaft 120, the length of the first blade 141 is greater than the length of the second blade 142, the first blade 141 is connected to the main shaft 120, the second blade 142 is spaced from the main shaft 120, and the through hole 114 is located between adjacent first blades 141 and second blades 142. It can also be understood that along the circumference of the rotating disk 110, the through hole 114-first blade 141-second blade 142-through hole 114 are arranged in sequence. Multiple first blades 141 are arranged radially, and multiple second blades 142 are also arranged radially. The first blades 141 are spaced apart from the guide ring 130, and the second blades 142 are spaced apart from the guide ring 130. It can be understood that there is a spacing between the end of the first blade 141 away from the main shaft 120 and the guide ring 130, and there is a spacing between the end of the second blade 142 away from the main shaft 120 and the guide ring 130.

[0057] It is understandable that, referring to Figure 6 As shown, in some embodiments, the spacing between the first blade 141 and the guide ring 130 is smaller than the spacing between the second blade 142 and the guide ring 130. It can also be understood that the minimum distance from the first blade 141 to the guide ring 130 is smaller than the minimum distance from the second blade 142 to the guide ring 130, that is, relative to the second blade 142, the first blade 141 is closer to the guide ring 130, the first blade 141 can better guide the water flow to the guide ring 130, and the second blade 142 not only has a guiding effect but also stays away from the water-gas interface, avoids interaction with the water-gas interface, and further reduces noise.

[0058] Reference Figure 5 As shown, in some other examples, the distance between the first blade 141 and the guide ring 130 may also be equal to the distance between the second blade 142 and the guide ring 130. It can also be understood that the minimum distance from the first blade 141 to the guide ring 130 is equal to the minimum distance from the second blade 142 to the guide ring 130.

[0059] It is understandable that, referring to Figure 5As shown, in some embodiments, along the radial direction of the turntable 110, the through hole 114 is closer to the guide ring 130 relative to the first blade 141. It can be understood that the minimum distance from the inner wall of the through hole 114 to the inner circumference 132 of the guide ring 130 is smaller than the minimum distance from the first blade 141 to the inner circumference 132 of the guide ring 130. This can make the position of the through hole 114 closer to the water-gas interface. Viewed from the side, the through hole 114 crosses the end face of the first blade 141. It can also be understood that the through hole 114 is directly opposite to the water-gas interface, shortening the path for the bubbles at the water-gas interface to reach the through hole 114, which is conducive to the rapid discharge of the bubbles.

[0060] In some embodiments, the through hole 114 is between the first blade 141 and the second blade 142. The through hole 114 can be closer to the first blade 141 and farther away from the second blade 142. It can be understood that the minimum distance between the inner wall of the through hole 114 and the first blade 141 is smaller than the minimum distance between the inner wall of the through hole 114 and the second blade 142. Since the first blade 141 is closer to the water-vapor interface than the second blade 142, the first blade 141 interacts with the water-vapor interface to produce more bubbles. The through hole 114 close to the first blade 141 can shorten the path from the bubbles to the through hole 114, thereby quickly discharging the bubbles and reducing noise.

[0061] It should be noted that when the impeller 100 rotates, the end surface of the main blade 140 close to the guide ring 130 interacts with the water-gas interface, and the main blade 140 will continuously cut into or leave the water or gas, thereby generating turbulence or eddy currents, causing the flow rate of the water or gas to change suddenly, and at the same time, the friction and collision between the main blade 140 and the water and gas will generate noise. In the related art, the end surface of the main blade 140 has a sharp edge, and the sharp edge will make the above phenomenon more serious when cutting into or leaving the water or gas, thereby generating a large noise.

[0062] Based on this, refer to Figure 7 and Figure 8As shown, in some embodiments of the utility model, the end surface of the main blade 140 close to the guide ring 130 is constructed as an arc surface 143. The arc surface 143 can allow the water flow or air flow to flow smoothly when cutting into or out of water or gas, avoiding a sudden change in the flow rate of the water flow or air flow, thereby reducing the friction and collision between the main blade 140 and the water and gas, reducing the possibility of turbulence or eddy current during operation, and thus reducing the generation of noise. It should be noted that the arc surface 143 can be a circular arc surface 143, an elliptical surface or other roughly smooth transition curved surface, and the arc surface 143 can be formed by rounding the end surface of the main blade 140 close to the guide ring 130. The arc surface 143 can be set separately on the end surface of the first blade 141 or the second blade 142 close to the guide ring 130, and can also be arranged on the end surfaces of the first blade 141 and the second blade 142 close to the guide ring 130 at the same time.

[0063] In some embodiments, in order to improve the structural strength of the impeller 100, the impeller 100 may be formed into an integral structure by an integral molding process. For example, the impeller 100 may be a plastic part, and is integrally formed by an injection molding process. Alternatively, the impeller 100 may also be formed by other integral molding processes. For example, the impeller 100 may be a metal part, and in this case, the integral structure may be formed by a process such as forging.

[0064] Reference Fig. 9 As shown, it is a drainage pump 1000 of an embodiment of the utility model, and the drainage pump 1000 includes a housing 200, a pump cover 300, a motor 400 and an impeller 100 of the above embodiment. Specifically, a mounting cavity 210 is provided in the housing 200, the pump cover 300 is connected to the housing 200, the pump cover 300 is located below the housing 200, a drainage cavity 310 is formed between the pump cover 300 and the housing 200, a water inlet 311 communicating with the drainage cavity 310 is provided at the bottom of the pump cover 300, a water outlet 312 communicating with the drainage cavity 310 is provided at the side of the pump cover 300, the motor 400 is provided in the mounting cavity 210, the rotating shaft 410 of the motor 400 extends from the mounting cavity 210 into the drainage cavity 310, the impeller 100 is provided in the drainage cavity 310, the main shaft 120 is connected to the rotating shaft 410, and the water inlet blade 150 is arranged toward the water inlet 311.

[0065] The drainage pump 1000 of this embodiment can be applied to electrical appliances with drainage requirements such as air conditioner indoor units, washing machines, dishwashers, etc. Since the drainage pump 1000 adopts all the technical solutions of the impeller 100 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.

[0066] The embodiment of the utility model also provides an air conditioner, which includes 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 311 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.

[0067] 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.

[0068] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An impeller, characterized in that: include: A rotating disk having a first surface and a second surface disposed opposite to each other, wherein a water hole penetrating through the first surface and the second surface 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 guide ring, arranged around the outer periphery of the rotating disk; A water inlet blade, arranged at the water inlet side of the water hole and connected to the main shaft; A plurality of main blades, all connected to the first surface, and the plurality of main blades are radially arranged along the circumference of the main shaft; The outer edge of the turntable is provided with a plurality of through holes penetrating the first surface and the second surface, the plurality of through holes are arranged at intervals along the circumference of the turntable, and the axis of the through holes is inclined from the second surface to the first surface along the rotation direction of the turntable.

2. The impeller according to claim 1, characterized in that: The angle between the axis of the through hole and the axis of the main shaft is greater than or equal to 5° and less than or equal to 60°.

3. The impeller according to claim 1, characterized in that: Along the circumference of the rotating disk, the plurality of through holes and the plurality of main blades are arranged alternately.

4. The impeller according to claim 3, characterized in that: The multiple main blades are divided into multiple first blades and multiple second blades. The multiple first blades and the multiple second blades are alternately arranged along the circumference of the turntable. 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. The position of the through hole in the circumferential direction of the turntable is between adjacent first blades and second blades.

5. The impeller according to claim 4, characterized in that: The end of the main blade away from the main shaft is spaced apart from the guide ring, and the through hole is arranged closer to the guide ring than the first blade.

6. The impeller according to claim 5, characterized in that Along the radial direction of the rotating disk, the minimum distance between the first blade and the guide ring is less than or equal to the minimum distance between the second blade and the guide ring.

7. The impeller according to claim 1, characterized in that There are multiple water inlet blades, and the multiple water inlet blades are arranged along the circumferential direction of the main shaft and extend along the axial direction of the main shaft.

8. The impeller according to claim 1, characterized in that The end of the main blade away from the main shaft is spaced apart from the guide ring, and the end surface of the main blade facing the guide ring is constructed as a cambered surface.

9. 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 8, 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.

10. An air conditioner, characterized in that Including the drainage pump as described in claim 9.

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