Impeller, drainage pump and air conditioner

Abstract

The impeller comprises a rotating disc, a main shaft, a flow guide ring and a plurality of main blades, the rotating disc is provided with a first surface, and a water passing hole is formed in the center of the rotating disc; the main shaft penetrates through the water passing hole and is coaxial with the turntable; the flow guide ring is arranged around the peripheral edge of the turntable; the multiple main blades are arranged on the first surface and are radially distributed in the circumferential direction of the main shaft, the ends, away from the main shaft, of the main blades and the flow guide ring are arranged at intervals, and water passing grooves are formed in the ends, away from the main shaft, of the main blades and are formed from the tops of the main blades to the roots of the main blades. According to the impeller, the water passing grooves are formed in the ends, away from the main shaft, of the main blades, part of water flowing through the main blades can penetrate through the water passing grooves, part of the water and air are divided, and therefore the possibility that turbulent flow or vortex is generated at the ends of the main blades in the rotating process of the impeller can be reduced; and thus, the noise is reduced.

Description

Technical Field

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

[0002] When the air conditioner is running, the indoor air exchanges heat with the internal parts of the air conditioner, thereby generating condensed water, which is collected behind the water tray and discharged through the drain pump. Due to the structural characteristics of the drain pump, there will be both air and water in the impeller of the drain pump. When the impeller rotates, the water will flow along the wall of the main blade and gather in the guide ring under the action of centrifugal force. The end of the impeller main blade will collide with the gathered water and air and generate turbulence or vortex, which will generate loud 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 that can effectively reduce the possibility of turbulence or eddy currents generated at the ends of the main blades during the rotation of the impeller, thereby reducing 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, a guide ring and a plurality of main blades, the turntable having a first surface, a water hole being provided in the center of the turntable; the main shaft being passed through the water hole and being coaxially arranged with the turntable; the guide ring being arranged around the outer circumference of the turntable; a plurality of main blades being arranged on the first surface, the plurality of main blades being radially arranged along the circumference of the main shaft, the main blades being spaced apart from the guide ring and being provided with a water groove, the water groove being located at an end of the main blade away from the main shaft, and the water groove extending from the end face of the main blade away from the first surface toward the first surface.

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

[0007] The multiple main blades of the impeller are arranged radially along the circumference of the main shaft. When the impeller rotates, the main blades push the water to rotate. Under the action of centrifugal force, the water will flow along the wall of the main blade toward the guide ring and gather, and finally be discharged from the impeller. Since the main blades and the guide ring are arranged at intervals, water and gas can pass through the gap between the main blades and the guide ring and flow along the circumference of the guide ring. By providing a water groove at the end of the main blade away from the main shaft, part of the water and gas can pass through the water groove and divert part of the water and gas, thereby reducing the gathering of water and gas at the end of the main blade, reducing the possibility of turbulence or eddy current at the end of the main blade during the rotation of the impeller, and thereby reducing the generation of noise.

[0008] According to the impeller of the first aspect of the utility model, a part of the plurality of main blades are first blades, the plurality of first blades are connected to the main shaft, and the water groove is located at an end of the first blade away from the main shaft.

[0009] According to the impeller of the first aspect of the utility model, a part of the plurality of main blades are first blades, and another part are second blades. The plurality of first blades and the plurality of second blades are alternately arranged 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 water flow groove.

[0010] According to the impeller of the embodiment of the first aspect of the utility model, along the radial direction of the main shaft, the gap between the second blade and the guide ring is greater than or equal to the gap between the first blade and the guide ring.

[0011] According to the impeller of the first aspect of the utility model, along the axial direction of the main shaft, the height of the water groove is greater than or equal to 0.9 times the height of the main blade, and less than or equal to the height of the main blade.

[0012] According to the impeller of the embodiment of the first aspect of the utility model, the minimum distance between the wall surface of the water groove away from the main shaft and the end surface of the main blade away from the main shaft is 0.1mm to 3mm.

[0013] According to the impeller of the first aspect of the present invention, the width of the water channel is 0.1 mm to 3 mm along the radial direction of the rotating disk.

[0014] According to the impeller of the first aspect of the utility model, the turntable is provided with a plurality of through holes, and along the circumference of the turntable, the plurality of through holes are alternately arranged with the plurality of first blades and the plurality of second blades, and the plurality of through holes are arranged at the outer edge of the turntable.

[0015] The drainage pump according to the embodiment of the second aspect of the utility model comprises: a shell, a pump cover, a motor and an impeller as described in the embodiment of the first aspect of the utility model, wherein a mounting cavity is provided in the shell; the pump cover 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 communicated with 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, the main shaft is provided with water inlet blades, and the water inlet blades are arranged toward the water inlet.

[0016] The drainage pump according to the embodiment of the utility model has at least the following beneficial effects:

[0017] The drainage pump adopts the impeller of the first aspect embodiment, and a water groove is added on the end of the main blade of the impeller away from the main shaft. A part of the water flowing through the main blade can pass through the water groove, thereby realizing the diversion of the water, reducing the accumulation of water and gas at the end of the main blade, and reducing the possibility of turbulence or eddy current generated at the end of the main blade during the rotation of the impeller, thereby reducing the generation of noise and reducing the noise level of the drainage pump.

[0018] 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.

[0019] The air conditioner of the embodiment of the utility model has at least the following beneficial effects: by arranging a water groove on the impeller of the drainage pump and by arranging a water groove at the end of the main blade away from the main shaft, a part of the water flowing through the main blade can pass through the water groove, thereby realizing the diversion of the water body, reducing the accumulation of water and gas at the end of the main blade, reducing the possibility of turbulence or eddy current generated at the end of the main blade during the rotation of the impeller, and thus reducing the generation of noise, which is beneficial to reducing the noise generated during the operation of the air conditioner and improving the user 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 This is a schematic diagram of the structure of an impeller according to an embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of an impeller in another embodiment of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of an impeller in another embodiment of the utility model;

[0025] Figure 4 A top view of an impeller according to an embodiment of the present invention;

[0026] Figure 5 A side view of an impeller according to an embodiment of the present utility model;

[0027] Figure 6 This is a schematic diagram of the structure of the impeller and the water hole of an embodiment of the utility model;

[0028] Figure 7It is a cross-sectional view of a drainage pump according to an embodiment of the utility model.

[0029] Figure Number:

[0030] Impeller 100; rotating disk 110; first surface 111; water hole 112; second surface 113; main shaft 120; guide ring 130; main blade 140; water groove 141; first blade 142; second blade 143; gap 144; through hole 150; water inlet blade 160; third blade 161;

[0031] Drain pump 200 ; housing 210 ; mounting cavity 211 ; pump cover 220 ; water inlet 221 ; water outlet 222 ; drainage cavity 223 ; motor 230 ; rotating shaft 231 ; sealing element 240 . DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] The embodiment of the present utility model provides an impeller 100 applied to a drainage pump 200. The specific structure and function of the impeller 100 provided by the embodiment of the present utility model will be further described below in conjunction with text and drawings.

[0037] Reference Figure 1As shown, the impeller 100 according to the first embodiment of the utility model includes: a turntable 110, a main shaft 120, a guide ring 130 and a plurality of main blades 140. The turntable 110 serves as a basic component of the impeller 100 and has a first surface 111. A water hole 112 is provided at the center of the turntable 110. The first surface 111 is arranged toward the water outlet side of the water hole 112. The main shaft 120 is penetrated into the water hole 112. The aperture of the water hole 112 is larger than the shaft diameter of the main shaft 120. The main shaft 120 is connected to the inner wall of the water hole 112 by ribs. The gap formed between the inner wall of the water hole 112 and the outer peripheral wall of the main shaft 120 can allow water to pass through. The main shaft 120 and the turntable 110 are coaxially arranged. The main shaft 120 is used to be fixedly connected to the rotating shaft 231 of the motor 230 in the drainage pump 200. The motor 230 drives the entire impeller 100 to rotate through the main shaft 120, ensuring that the main shaft 120 can stably drive the impeller 100 to rotate, thereby being able to suck water into the drainage pump 200.

[0038] Reference Figure 1 and Figure 2 As shown, in the embodiment of the utility model, the guide ring 130 is arranged on the outer circumference of the turntable 110 and is integrally formed with the turntable 110. The guide ring 130 forms a full circle around the turntable 110, and a plurality of main blades 140 are arranged on the first surface 111 of the turntable 110 in a radial manner along the circumference of the main shaft 120. A gap 144 is formed between the end of the main blade 140 protruding from the first surface 111 and away from the main shaft 120 and the guide ring 130. When the impeller 100 rotates, the main blade 140 drives the water body to rotate. Under the action of centrifugal force, the water body moves toward the end of the main blade 140 away from the main shaft 120. At this time, the gap between the main blade 140 and the guide ring 130 can effectively divert and guide the water body, ensuring that the water body flows more smoothly in the turntable 110.

[0039] It can be understood that the main blades 140 can be set to three, four or more, and the specific number of the main blades 140 can be selected according to actual application requirements.

[0040] Reference Figure 1 As shown, in the embodiment of the utility model, a water groove 141 is provided at one end of the main blade 140 away from the main shaft 120, and the water groove 141 extends from the end surface of the main blade 140 away from the first surface 111 toward the first surface 111, specifically, the water groove 141 extends from the top of the main blade 140 toward the root. Along the circumference of the main shaft 120, the water groove 141 runs through both sides of the main blade 140. When the impeller 100 rotates, a part of the water pushed by the main blade 140 can pass through the water groove 141, so that the water can be diverted.

[0041] It should be noted that the water groove 141 is set from the top of the main blade 140 to the root of the main blade 140. Along the radial direction of the main shaft 120, the cross-section of the water groove 141 can be rectangular, arc-shaped, etc. The specific shape of the water groove 141 can be selected according to actual application requirements. Figure 5 Along the radial direction of the main shaft 120, the cross-section of the water channel 141 is in the shape of a rectangle.

[0042] It can be understood that according to the impeller 100 of the embodiment of the utility model, the plurality of main blades 140 of the impeller 100 are radially arranged along the circumference of the main shaft 120. When the impeller 100 rotates, the main blades 140 push the water body to rotate. Under the action of centrifugal force, the water body flows along the wall surface of the main blades 140 toward the guide ring 130 and gathers, and finally is discharged from the impeller 100. Since the main blades 140 and the guide ring 130 are arranged at intervals, water and gas can pass through the space between the main blades 140 and the guide ring 130. The air flows in the circumferential direction of the guide ring 130 through the gap 144. By providing a water groove 141 at the end of the main blade 140 away from the main shaft 120, part of the water and gas flowing through the main blade 140 can pass through the water groove 141, thereby realizing the diversion of part of the water and air, thereby reducing the gathering of water and gas at the end of the main blade 140 away from the main shaft 120, reducing the possibility of turbulence or eddy current generated at the end of the main blade 140 during the rotation of the impeller 100, and further reducing the generation of noise.

[0043] It should be noted that due to the structural characteristics of the drain pump 200, gas and water exist simultaneously inside it, forming a two-phase state, and there is a relatively obvious dividing line between water and gas. When the water level in the water receiving tray drops below the inhalable water level of the drain pump 200, if the drain pump 200 continues to work, due to the rotation of the drain pump 200, although a certain drainage height is maintained in the water receiving tray, water will not be discharged. At this time, the water and gas inside the drain pump 200 reach a relatively stable equilibrium state, which is called "critical". Specifically, in the critical state, the interface between water and gas is roughly located at the outer edge of the turntable. It is worth noting that when the drain pump 200 reaches a critical state and the drainage height is low, the impeller 100 of the drain pump 200 rotates so that the water and air gather at the end of the main blade 140 and cannot be discharged. The end of the main blade 140 is prone to turbulence or eddy currents, which will produce greater noise.

[0044] In the embodiment of the utility model, a water trough 141 is provided at one end of the main blade 140 away from the main shaft 120. When the drainage pump 200 reaches a critical state and the drainage height is low, the water trough 141 can divert the water and air gathered at the end of the main blade 140, greatly reducing the possibility of turbulence or eddy current generated at the end of the main blade 140 during the rotation of the impeller 100, and the impeller 100 can achieve a better noise reduction effect, which can significantly reduce noise.

[0045] Reference Figure 5 and Figure 6 As shown, it should be noted that the turntable 110 also has a second surface 113, the first surface 111 and the second surface 113 are arranged back to back with each other, the first surface 111 is arranged toward the water outlet side of the water hole 112, and the second surface 113 is arranged toward the water inlet side of the water hole 112, the water hole 112 runs through the first surface 111 and the second surface 113, and the main shaft 120 is located at one end of the water inlet side of the water hole 112. The water inlet blade 160 is provided, and the water inlet blade 160 includes a plurality of third blades 161 arranged along the circumference of the main shaft 120. During the operation of the drainage pump 200, the motor 230 drives the impeller 100 and the water inlet blade 160 to rotate, and the plurality of third blades 161 can stir the water body to facilitate the drainage pump 200 to suck the water body into the water hole 112.

[0046] It is understandable that the entire water inlet blade 160 can be formed by two plates arranged perpendicular to each other, or can be in a spiral structure, and the shape of the water inlet blade 160 is not limited here.

[0047] Reference Figure 1 As shown, in the embodiment of the utility model, a part of the plurality of main blades 140 is a first blade 142, the ends of the plurality of first blades 142 are connected to the main shaft 120, and the gap 144 between each first blade 142 and the guide ring 130 is the same in size, and each first blade 142 is extended in different directions along the radial direction of the rotating disk 110 to present a radial arrangement, and the angles formed between adjacent first blades 142 are the same. Figure 1 and Figure 2 As shown, the water channel 141 is located at an end of the first blade 142 away from the main shaft 120 .

[0048] Reference Figure 1 It can be understood that one end of the first blade 142 is connected to the main shaft 120, and the other end extends in a direction away from the main shaft 120. When the main shaft 120 drives the impeller 100 to rotate, the first blade 142 covers a larger area along the radial direction of the turntable 110, which can guide the water body to flow toward the guide ring 130, which is beneficial to improving the drainage efficiency.

[0049] Reference Figures 1 to 3As shown, in an embodiment of the utility model, a part of the multiple main blades 140 are first blades 142, and the other part are second blades 143. The multiple first blades 142 and the multiple second blades 143 are alternately arranged along the circumference of the main shaft 120, and along the radial direction of the main shaft 120, the length of the first blade 142 is greater than the length of the second blade 143. The first blade 142 is connected to the main shaft 120, and the second blade 143 is spaced apart from the main shaft 120. The longer first blade 142 and the shorter second blade 143 cooperate to improve the efficiency of the drainage pump 200.

[0050] It should be noted that at least one second blade 143 is disposed between two adjacent first blades 142, and the end of the second blade 143 close to the main shaft 120 is spaced apart from the main shaft 120, and the end away from the main shaft 120 is spaced apart from the guide ring 130. In the radial direction of the main shaft 120, the length of the first blade 142 is greater than the length of the second blade 143, and the cooperation of the longer first blade 142 and the shorter second blade 143 can improve the efficiency of the drainage pump 200.

[0051] Reference Figures 1 to 3 As shown, in an embodiment of the utility model, at least one of the first blade 142 and the second blade 143 is provided with a water groove 141. Specifically, in one embodiment, the end of the first blade 142 away from the main shaft 120 is provided with a water groove 141; in another embodiment, the end of the second blade 143 away from the main shaft 120 is provided with a water groove 141; in another embodiment, the first blade 142 and the second blade 143 are respectively provided with a water groove 141 at one end away from the main shaft 120. By simultaneously providing the water groove 141 on the first blade 142 and the second blade 143, the water grooves 141 on the first blade 142 and the second blade 143 can divert water and air, which can further reduce the possibility of turbulence or eddy current generated at the end of the main blade 140 during the rotation of the impeller 100, thereby reducing the noise generated during operation.

[0052] Reference Figure 3 and Figure 4As shown, in the embodiment of the present invention, along the radial direction of the main shaft 120 , the gap 144 between the second blade 143 and the guide ring 130 is greater than or equal to the gap 144 between the first blade 142 and the guide ring 130 . When the gap 144 between the second blade 143 and the guide ring 130 is equal to the gap 144 between the first blade 142 and the guide ring 130; when the impeller 100 rotates, the water pushed by the first blade 142 can pass through the first blade 142 and the second blade 143 smoothly; when the gap 144 between the second blade 143 and the guide ring 130 is larger than the gap 144 between the first blade 142 and the guide ring 130, when the impeller 100 rotates, the water pushed by the first blade 142 passes through the smaller gap 144 between the first blade 142 and the guide ring 130, and enters the larger gap 144 between the second blade 143 and the guide ring 130, and the water diffuses and flows in the gap 144 between the second blade 143 and the guide ring 130, thereby reducing the intensity of the collision and friction between the second blade 143 and the water and the air, thereby reducing the noise of the water flowing between the first blade 142 and the second blade 143.

[0053] Reference Figure 5 As shown, in the embodiment of the utility model, along the axial direction of the main shaft 120, the distance between the end surface of the main blade 140 away from the first surface 111 and the first surface 111 is H. Specifically, along the axial direction of the main shaft 120, the height of the top end of the main blade 140 protruding from the first surface 111 is H.

[0054] Reference Figure 5 As shown, in the embodiment of the utility model, the distance between the end surface of the main blade 140 away from the first surface 111 and the bottom wall of the water groove 141 is h, specifically, the depth of the water groove 141 along the axial direction of the main shaft 120 is h. Among them, h is greater than or equal to 0.9 times H and less than or equal to H, that is, 0.9H≤h≤H. At this time, the bottom wall of the water groove 141 is closer to the first surface 111, and the water in the impeller 100 can smoothly pass through the water groove 141, and the diversion effect of the water groove 141 is better.

[0055] It is understandable that the depth of the water channel 141 can also be 0.91H, 0.95H, etc., which can be selected according to actual application requirements.

[0056] Reference Figures 3 to 5 As shown, in an embodiment of the utility model, on the main blade 140, the water groove 141 is arranged with the top of the main and slave blades toward the root of the main blade 140, and the bottom wall of the water groove 141 is flush with the first surface 111, which is beneficial to reducing the resistance of the water body when passing through the water groove 141, and a part of the water body pushed by the main blade 140 can smoothly pass through the water groove 141.

[0057] It should be noted that, in some embodiments, the bottom wall of the water channel 141 may also be slightly higher than the first surface 111 , and it is only necessary to ensure that the water can pass through the water channel 141 relatively smoothly.

[0058] Reference Figure 5 As shown, in the embodiment of the utility model, the minimum distance between the wall surface of the water groove 141 away from the main shaft 120 and the end surface of the main blade 140 away from the main shaft 120 is L; wherein, the value of L cannot be too small, and if the value of L is too small, it is easy to cause the structural strength of the end of the main blade 140 away from the main shaft 120 to be poor, and the end of the main blade 140 away from the main shaft 120 is more likely to break when the impeller 100 rotates; in addition, the value of L cannot be too large, and if the value of L is too large, the distance between the water groove 141 and the water-gas interface is too large, Resulting in a weakened noise reduction effect; specifically, in some embodiments, the minimum distance L between the wall surface of the water trough 141 away from the main shaft 120 and the end surface of the main blade 140 away from the main shaft 120 satisfies: 0.1mm≤L≤3mm, and the value of the minimum distance L between the wall surface of the water trough 141 away from the main shaft 120 and the end surface of the main blade 140 away from the main shaft 120 is maintained within this range, which can not only ensure the structural strength of the end of the main blade 140 away from the main shaft 120, but also achieve a better noise reduction effect.

[0059] Reference Figure 5 As shown, in some embodiments, the wall of the water groove 141 away from the main shaft 120 is parallel to the axial direction of the main shaft 120, and the minimum distance between the wall of the water groove 141 away from the main shaft 120 and the end face of the main blade 140 away from the main shaft 120 is between 0.1 mm and 3 mm.

[0060] It can be understood that in some embodiments, the minimum distance L between the wall surface of the water groove 141 away from the main shaft 120 and the end surface of the main blade 140 away from the main shaft 120 can be 0.1mm, 0.15mm, 0.2mm, 1mm, 2mm, etc., which can be selected according to actual application requirements.

[0061] Reference Figure 5 As shown, in some embodiments, along the radial direction of the turntable 110, the width of the water channel 141 is a, wherein the value of a cannot be too small. If the value of a is too small, the resistance between the water body and the water channel 141 will be large when the water body passes through, which will easily affect the water flow efficiency; in addition, the value of a cannot be too large. If the value of a is too large, the efficiency of the drainage pump 200 will be reduced; specifically, the width of the water channel 141 a satisfies: 0.1mm≤a≤3mm, and the value of the width of the water channel 141 a is kept within this range, which can not only ensure that the water body can pass through the water channel 141 smoothly, but also ensure the efficiency of the drainage pump 200.

[0062] It can be understood that, in some embodiments, the width a of the water groove 141 can be 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 1 mm, 2 mm, etc., and can be selected according to actual application requirements.

[0063] Reference Figures 1 to 3 As shown, in some embodiments, the turntable 110 is provided with a plurality of through holes 150 penetrating the turntable 110 along the axial direction of the main shaft 120. Along the circumference of the turntable 110, the plurality of through holes 150 and the plurality of first blades 142 and the plurality of second blades 143 are alternately arranged. Specifically, at least one through hole 150 is provided between adjacent first blades 142 and second blades 143. When the impeller 100 is assembled on the drainage pump 200, the through hole 150 can connect the inner side and the outer side of the drainage pump 200, so that the air pressure inside and outside can tend to be balanced.

[0064] It should be noted that when water and air are sucked into the impeller 100 together, the air can be discharged through the through hole 150, thereby balancing the pressure difference between the inside and outside of the impeller 100, reducing the axial force, and further reducing the vibration of the impeller 100 caused by the pressure difference during operation, and further reducing the noise generated by the impeller 100 during operation.

[0065] In addition, the through hole 150 of the present embodiment passes through the first surface 111 and the second surface 113, and the roots of the first blade 142 and the second blade 143 are fixed to the turntable 110, so that the water-throwing direction of the first blade 142 and the second blade 143 is perpendicular to the axial direction of the through hole 150. It is difficult for the water thrown out by the first blade 142 to directly enter the through hole 150, 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 100 during operation.

[0066] Reference Figure 4 As shown, in the embodiment of the utility model, the through hole 150 is arranged at the outer edge of the turntable 110, that is, the position of the turntable 110 close to the guide ring 130. When the impeller 100 rotates, the bubbles in the impeller 100 move with the water flow. Under the action of the first blade 142, the water flow speed at the outer edge of the turntable 110 is faster, and the bubbles are easier to discharge. Therefore, setting the through hole 150 at the outer edge of the turntable 110 can improve the air exhaust efficiency, which is beneficial to reduce the noise generated by the impeller 100 during operation.

[0067] It should be noted that, during the application process, the aperture of the through hole 150 can be set according to demand. Specifically, the greater the flow rate of the water body in the impeller 100, the larger the aperture can be set.

[0068] It is understandable that the sizes and shapes of the through holes 150 may be the same or different; the cross-sectional shape of the through hole 150 may be elliptical, rectangular, triangular, rhombus, trapezoidal or waist-shaped, etc., which is not specifically limited here.

[0069] Reference Figure 7 According to the second embodiment of the present invention, the drainage pump 200 includes: a housing 210, a pump cover 220, a motor 230 and an impeller 100 as in the first embodiment of the present invention, wherein the housing 210 is provided with an installation cavity 211; the pump cover 220 is connected to the housing 210 and forms a drainage cavity 223 with the housing 210, and the pump cover 220 is provided with a water inlet 221 and a water outlet 222 communicated with the drainage cavity 223; the motor 230 is arranged in the installation cavity 211, and the rotating shaft 231 of the motor 230 extends from the installation cavity 211 into the drainage cavity 223; the impeller 100 is arranged in the drainage cavity 223, the main shaft 120 is connected to the rotating shaft 231, and the water inlet blades 160 are arranged toward the water inlet 221.

[0070] According to the drainage pump 200 of the embodiment of the utility model, a water groove 141 is added to the end of the main blade 140 on the impeller 100 away from the main shaft 120. The water groove 141 can allow part of the water to smoothly pass through the main blade 140, which not only helps to reduce the impact force of the water on the end of the main blade 140, but also effectively weakens the vibration generated by the main blade 140 when hitting the water and air, thereby reducing the possibility of turbulence or eddy currents generated at the end of the main blade 140 during the rotation of the impeller 100, thereby achieving the purpose of reducing noise.

[0071] It should be noted that a sealing element 240 may be further provided between the pump cover 220 and the housing 210 . The sealing element 240 may be a rubber ring or the like, which will not be described in detail herein.

[0072] The air conditioner according to the third aspect embodiment of the utility model comprises a water receiving pan and a drain pump 200 of the second aspect embodiment, wherein the water receiving pan is used to collect condensed water, and the water inlet 221 of the drain pump 200 is connected to the water receiving pan, so that the condensed water in the water receiving pan can be discharged.

[0073] The air conditioner of the embodiment of the utility model optimizes the structure of the impeller 100 of the drainage pump 200 by setting a water groove 141 on the impeller 100 of the drainage pump 200, which can effectively reduce the intensity of the oscillation generated when the impeller 100 hits the water and the air, and reduce the possibility of turbulence or eddy current generated at the end of the main blade 140 during the rotation of the impeller 100, thereby reducing the noise of the drainage pump 200, which is beneficial to reducing the noise generated during the operation of the air conditioner and improving the user experience.

[0074] 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 has a first surface, 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 guide ring, arranged around the outer periphery of the rotating disk; A plurality of main blades are arranged on the first surface, and the plurality of main blades are radially arranged along the circumference of the main shaft. The main blades are spaced apart from the guide ring and are provided with water grooves. The water grooves are located at one end of the main blades away from the main shaft, and the water grooves extend from the end surface of the main blade away from the first surface toward the first surface.

2. The impeller according to claim 1, characterized in that: A portion of the plurality of main blades are first blades, the plurality of first blades are connected to the main shaft, and the water channel is located at an end of the first blade away from the main shaft.

3. 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 alternately arranged 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 water flow groove.

4. The impeller according to claim 3, characterized in that: Along the radial direction of the main shaft, a gap between the second blade and the guide ring is greater than or equal to a gap between the first blade and the guide ring.

5. The impeller according to claim 1, characterized in that: Along the axial direction of the main shaft, the height of the water channel is greater than or equal to 0.9 times the height of the main blade, and less than or equal to the height of the main blade.

6. The impeller according to claim 1, characterized in that The minimum distance between the wall surface of the water channel away from the main shaft and the end surface of the main blade away from the main shaft is 0.1 mm to 3 mm.

7. The impeller according to claim 1 or 6, characterized in that: Along the radial direction of the rotating disk, the width of the water channel is 0.1 mm to 3 mm.

8. The impeller according to claim 3, characterized in that: The rotating disk is provided with a plurality of through holes. Along the circumference of the rotating disk, the plurality of through holes are arranged alternately with the plurality of first blades and the plurality of second blades. The plurality of through holes are arranged at the outer edge of the rotating disk.

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, the main shaft is provided with water inlet blades, and the water inlet blades are arranged toward the water inlet.

10. An air conditioner, characterized in that Comprising the drainage pump as claimed in claim 9.

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