Impeller, draining pump and air conditioner

Abstract

The utility model discloses an impeller, a drainage pump and an air conditioner, and relates to the technical field of drainage pumps. The main shaft penetrates through the water passing hole of the rotating disc, a water passing cavity is formed between the flow guide ring and the rotating disc, the water passing cavity communicates with the water passing hole, and the multiple main blades are arranged in the water passing cavity. When the impeller rotates, water is sucked into the water passing cavity through the water passing holes and then thrown out of the water passing cavity. As the ends, away from the main shaft, of the main blades disturb the water-air interface, the step structures are arranged at the ends, away from the main shaft, of the main blades, the contact area of the main blades and the water-air interface can be reduced, disturbance of the main blades to the water-air interface is reduced, and the stability of the water-air interface is improved; smooth flowing of water flow in the drainage pump is facilitated, energy loss is reduced, the working efficiency of the drainage pump is improved, and meanwhile noise can be lowered.

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, the indoor air exchanges heat with the internal parts of the air conditioner, generating condensed water, which is collected in the water tray and discharged through the drain pump. The drain pump is in a state where water and gas coexist, and there is a clear boundary between water and gas. When the impeller of the drain pump rotates, the tail end of the impeller blades will disturb the water-gas interface, breaking the balance of the water-gas interface, causing water flow turbulence, increasing energy loss, and reducing the working efficiency of the drain pump. 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 proposes an impeller that can reduce the stirring of the water-gas interface by the tail end of the blade, improve the stability of the water-gas interface, help the smooth flow of water in the drainage pump, reduce energy loss, and improve the working efficiency of the drainage pump.

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

[0005] The impeller according to the first aspect of the present invention comprises: a turntable provided with a water through hole; a main shaft passing through the water through hole; a guide ring arranged around the outer circumference of the turntable, a water through cavity connected to the water through hole being formed between the guide ring and the turntable; a plurality of main blades connected to the bottom wall of the water through cavity, the plurality of main blades being radially arranged along the circumference of the main shaft, the ends of the main blades away from the main shaft being spaced apart from the guide ring, and at least some of the ends of the main blades away from the main shaft being provided with at least one step structure extending toward the bottom wall.

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

[0007] By setting a water hole through which the main shaft passes through the turntable, a water cavity is formed between the guide ring and the turntable, the water cavity is connected to the water hole, and a plurality of main blades are arranged in the water cavity. When the impeller rotates, water is sucked into the water cavity through the water hole, and then thrown out from the water cavity. Since the end of the main blade away from the main shaft will cause disturbance to the water-gas interface, at least one step structure extending toward the bottom wall of the water cavity is arranged at the end of the main blade away from the main shaft, so that a notch is formed on the upper side of one end of the main blade, thereby reducing the contact area between the main blade and the water-gas interface, thereby reducing the disturbance of the water-gas interface by the main blade, improving the stability of the water-gas interface, and facilitating the smooth flow of water in the drainage pump, reducing energy loss, improving the working efficiency of the drainage pump, and reducing noise at the same time.

[0008] According to some embodiments of the utility model, at least two of the plurality of main blades are first blades, and one end of at least two of the first blades is connected to the main shaft, and the other end is provided with the step structure.

[0009] According to some embodiments of the present invention, along the axial direction of the main shaft, the height of the first blade is H 1 The shortest distance between the step surface of the step structure of the first blade and the bottom wall of the water passage cavity is h 1 , satisfying: 0<h 1 / H 1 ≤0.95.

[0010] According to some embodiments of the utility model, a part of the multiple main blades are the first blades, and the other part are the second blades. At least one second blade is provided between two adjacent first blades. The second blade is connected to the bottom wall of the water passage chamber and is spaced apart from the main shaft.

[0011] According to some embodiments of the present invention, the step structure is provided at one end of the second blade away from the main shaft.

[0012] According to some embodiments of the present invention, along the axial direction of the main shaft, the height of the second blade is H 2 The shortest distance between the step surface of the step structure of the second blade and the bottom wall of the water passage chamber is h 2 , satisfying: 0<h 2 / H 2 ≤0.95.

[0013] According to some embodiments of the utility model, along the radial direction of the main shaft, the end of the first blade away from the main shaft is a first end, the end of the second blade away from the main shaft is a second end, and the maximum distance between the first end and the outer wall of the main shaft is greater than or equal to the maximum distance between the second end and the outer wall of the main shaft.

[0014] According to some embodiments of the utility model, along the radial direction of the main shaft, the length of the step structure is L, satisfying: 0.1mm≤L≤10mm; and / or, along the axial direction of the main shaft, the depth of the step structure is M, satisfying: 0.1mm≤M≤4mm.

[0015] According to some embodiments of the present invention, the turntable is provided with a through hole, and the through hole is located between adjacent first blades and second blades.

[0016] According to some embodiments of the utility model, a plurality of water inlet blades are provided on the outer wall of the main shaft, and the plurality of water inlet blades are located at an end of the main shaft away from the water passage chamber.

[0017] According to the drainage pump of the second aspect embodiment of the utility model, it includes a shell, which is provided with a mounting 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 mounting cavity, and the rotating shaft of the motor extends from the mounting cavity into the drainage cavity; the impeller of the first aspect embodiment, the impeller is arranged in the drainage cavity, and the main shaft and the rotating shaft are connected.

[0018] The drainage pump according to the embodiment of the utility model has at least the following beneficial effects:

[0019] The drainage pump adopts the impeller of the first aspect, and the impeller is provided with a water hole through which the main shaft is passed through the turntable, and a water cavity is formed between the guide ring and the turntable, the water cavity is connected with the water hole, and a plurality of main blades are arranged in the water cavity. When the impeller rotates, water is sucked into the water cavity through the water hole, and then thrown out from the water cavity. Since the end of the main blade away from the main shaft will cause disturbance to the water-gas interface, a step structure is provided at the end of the main blade away from the main shaft, which can reduce the contact area between the main blade and the water-gas interface, thereby reducing the disturbance of the main blade to the water-gas interface, improving the stability of the water-gas interface, and facilitating the smooth flow of water in the drainage pump, reducing energy loss, improving the working efficiency of the drainage pump, and reducing noise at the same time.

[0020] The air conditioner according to the third embodiment of the utility model comprises the drainage pump of the above embodiment.

[0021] The air conditioner according to the embodiment of the utility model has at least the following beneficial effects:

[0022] By adopting the drainage pump of the second embodiment, the impeller of the drainage pump is provided with a water hole through which the main shaft is passed through the turntable, and a water cavity is formed between the guide ring and the turntable, the water cavity is connected to the water hole, and a plurality of main blades are provided in the water cavity. When the impeller rotates, water is sucked into the water cavity through the water hole, and then thrown out from the water cavity. Since the end of the main blade away from the main shaft will cause disturbance to the water-gas interface, a step structure is provided at the end of the main blade away from the main shaft, which can reduce the contact area between the main blade and the water-gas interface, thereby reducing the disturbance of the main blade to the water-gas interface, improving the stability of the water-gas interface, and facilitating the smooth flow of water in the drainage pump, reducing energy loss, improving the working efficiency of the drainage pump, and reducing noise at the same time.

[0023] 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

[0024] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0025] Figure 1 It is a cross-sectional view of a drainage pump according to an embodiment of the utility model;

[0026] Figure 2 This is a schematic diagram of the structure of an impeller in one embodiment of the utility model;

[0027] Figure 3 This is a schematic structural diagram of an impeller of an embodiment of the utility model from another perspective;

[0028] Figure 4 It is a structural schematic diagram of an impeller of another embodiment of the utility model;

[0029] Figure 5 It is a structural schematic diagram of an impeller of another embodiment of the utility model;

[0030] Figure 6 It is a top view schematic diagram of an impeller of an embodiment of the utility model;

[0031] Figure 7 yes Figure 6 Sectional view at AA in the middle;

[0032] Figure 8 yes Figure 6 Cross-sectional view at BB in the middle.

[0033] Reference numerals:

[0034] Impeller 1000;

[0035] Rotating disk 100; water hole 111; through hole 112; guide ring 120; water cavity 130;

[0036] Main shaft 200; water inlet blade 210;

[0037] Main blade 300; first blade 310; first end 311; first step structure 312; second blade 320; second end 321; second step structure 322; step structure 330; step surface 331; connecting surface 332;

[0038] Drain pump 2000;

[0039] Housing 2100; installation cavity 2110; pump cover 2120; water inlet 2121; water outlet 2122; drainage cavity 2130;

[0040] Motor 2200; Rotating shaft 2210;

[0041] Sealing ring 2300. DETAILED DESCRIPTION

[0042] 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.

[0043] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, 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.

[0044] 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.

[0045] 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.

[0046] Reference Figure 1 and Figure 2 As shown, an impeller 1000 of an embodiment of the utility model can be used in a drainage pump 2000, and the drainage pump 2000 can be used in household appliances such as air conditioners, dishwashers, washing machines, etc. to achieve the function of drainage. In the embodiment of the utility model, the impeller 1000 includes a turntable 100, a guide ring 120, a main shaft 200 and a plurality of main blades 300. The turntable 100 is provided with a water hole 111, and the water hole 111 can be set at the center of the turntable 100. The guide ring 120 is arranged around the outer circumference of the turntable 100 and is fixedly connected to the turntable 100. The connection method can be one-piece molding, fastener connection, bonding, etc. A water cavity 130 is formed between the guide ring 120 and the turntable 100, and the water cavity 130 is connected to the water hole 111. The main shaft 200 is inserted into the water hole 111, and the main shaft 200 and at least part of the inner wall of the water hole 111 are spaced apart so that a channel for water to pass through is formed between the main shaft 200 and the water hole 111. A plurality of main blades 300 are connected to the bottom wall of the water cavity 130 and are radially distributed along the circumference of the main shaft 200. The end of the main blade 300 away from the main shaft 200 is spaced apart from the guide ring 120. Among them, at least part of the main blades 300 are provided with at least one step structure 330 extending toward the bottom wall at one end away from the main shaft 200, that is, along the direction close to the guide ring 120, the step structure 330 is gradually reduced. For example, it can be a one-step structure 330, or a two-step structure 330, and all subsequent embodiments are explained by taking the one-step structure 330 as an example. The step structure 330 has a step surface 331 and a connecting surface 332 connected to each other. The step surface 331 is located below the top wall of the main blade 300 , and the connecting surface 332 is connected to the upper end surface of the main blade 300 and the step surface 331 .

[0047] It is understandable that, since the main blades 300 and the guide ring 120 are arranged at intervals, when the impeller 1000 sucks water into the water chamber 130 through the water holes 111 during rotation, a portion of the water in the water chamber 130 can rotate along the inner wall of the guide ring 120, thereby reducing the subsequent water directly hitting the inner wall of the guide ring 120 during the process of being thrown out of the water chamber 130, resulting in increased noise, and thus reducing the noise of the impeller 1000 during operation. When the impeller 1000 rotates, water is sucked into the water chamber 130 through the water holes 111, and then thrown out of the water chamber 130. Under the critical state, a water-gas interface will appear along the radial direction of the main shaft 200, and when the main blade 300 stirs the water-gas interface, it will cause increased noise. Therefore, a step structure 330 is set at the end of the main blade 300 away from the main shaft 200, so that a notch is formed on the upper side of one end of the main blade 300 to reduce the contact area between the main blade 300 and the water-gas interface, thereby reducing the disturbance of the water-gas interface by the main blade 300, improving the stability of the water-gas interface, and contributing to the smooth flow of water in the drainage pump 2000, reducing energy loss, and improving the working efficiency of the drainage pump 2000. At the same time, it can reduce the peak noise in the critical state and enhance the user experience.

[0048] Reference Figure 2 As shown, in the embodiment of the utility model, at least two of the plurality of main blades 300 are first blades 310, and one end of the first blade 310 is connected to the main shaft 200, and the connection method can be one-piece molding, bonding, fastener connection, etc. One end of the first blade 310 is connected to the main shaft 200, the purpose of which is to determine the relative position of the main shaft 200 and the water hole 111, and to play a role in fixing the main shaft 200. A step structure 330 is provided at one end of the first blade 310 away from the main shaft 200. For the convenience of explanation, the step structure 330 of the first blade 310 is referred to as the first step structure 312. Figure 6 and Figure 7 As shown, along the axial direction of the main shaft 200, the height of the first blade 310 is H 1 The shortest distance between the step surface 331 of the first step structure 312 and the bottom wall of the water chamber 130 is h 1 , satisfying: 0<h 1 / H 1 ≤0.95. It is understandable that h 1 It reflects the height of the connection surface 332, h 1 The larger the h is, the smaller the height of the connecting surface 332 is; 1 The larger the h is, the greater the height of the connecting surface 332 is. 1 / H 1 When it is greater than 0.95, it means that the height of the connecting surface 332 is too small to reduce the contact area between the first blade 310 and the water-air interface, resulting in increased noise.1 / H 1 The size of can effectively reduce the contact area between the first end 311 and the water-gas interface, and reduce the peak noise in the critical state.

[0049] Continue to refer to Figure 2 As shown, in an embodiment of the utility model, a part of the plurality of main blades 300 is a first blade 310, and another part is a second blade 320, and at least one second blade 320 is provided between two adjacent first blades 310. In one embodiment, a plurality of second blades 320 are provided, and the plurality of second blades 320 and the plurality of first blades 310 are alternately arranged along the circumference of the main shaft 200. The second blade 320 is connected to the bottom wall of the water passage chamber 130 and one end is spaced apart from the main shaft 200, and the other end is spaced apart from the guide ring 120. It can be understood that the second blade 320 is connected to one end of the water passage chamber 130 and is spaced apart from the main shaft 200, which can increase the water inlet area of ​​the water passage hole 111 and improve the water inlet efficiency. The first blade 310 and the second blade 320 are provided at the same time, which can increase the work area, improve the performance of the impeller 1000, and increase the water discharge.

[0050] Continue to refer to Figure 2 As shown, in the embodiment of the utility model, a step structure 330 is provided at one end of the second blade 320 away from the main shaft 200. For the convenience of explanation, the step structure 330 of the second blade 320 is referred to as a second step structure 322. It can be understood that the second step structure 322 can reduce the contact area between the second blade 320 and the water-gas interface, thereby reducing the disturbance of the second blade 320 on the water-gas interface, so as to reduce the peak noise in the critical state and improve the user experience.

[0051] Referring to FIG. 4 , in another embodiment of the present invention, the second blade 320 may not be provided with the second step structure 322, and only the first blade 310 may be provided with the first step structure 312; or, referring to FIG. Figure 5 As shown, the first blade 310 is not provided with the first step structure 312, and only the second blade 320 is provided with the second step structure 322. The appropriate solution is selected according to the actual situation. For the convenience of explanation, in all subsequent embodiments, the first blade 310 is provided with the first step structure 312 and the second blade 320 is provided with the second step structure 322 as an example for explanation.

[0052] Reference Figure 8 As shown, in the embodiment of the present invention, along the axial direction of the main shaft 200, the height of the second blade 320 is H 2 The shortest distance between the step surface 331 of the second step structure 322 and the bottom wall of the water chamber 130 is h 2 , satisfying: 0<h 2 / H 2≤0.95. It is understandable that h 2 It reflects the height of the connection surface 332, h 2 The larger the h is, the smaller the height of the connecting surface 332 is; 2 The larger the h is, the greater the height of the connecting surface 332 is. 2 / H 2 When it is greater than 0.95, it means that the height of the connecting surface 332 is too small to reduce the contact area between the second blade 320 and the water-air interface, resulting in increased noise. 2 / H 2 The size of can effectively reduce the contact area between the second blade 320 and the water-gas interface and reduce the peak noise in the critical state.

[0053] Reference Figure 6 As shown, in the embodiment of the utility model, along the radial direction of the main shaft 200, the end of the first blade 310 away from the main shaft 200 is the first end 311, and the end of the second blade 320 away from the main shaft 200 is the second end 321, and the maximum distance between the first end 311 and the outer wall of the main shaft 200 is greater than or equal to the maximum distance between the second end 321 and the outer wall of the main shaft 200. Assuming that the second end 321 protrudes from the first end 311 in the radial direction, since the blade is in a rotating state during operation, when water passes over the first end 311, it is easy to hit the second end 321, resulting in increased noise. Therefore, by reasonably designing the positions of the first end 311 and the second end 321, the situation of water hitting the second end 321 when passing over the first end 311 is reduced, which can reduce noise and improve the rationality of the structural design of the impeller 1000.

[0054] Reference Figure 7As shown, in the embodiment of the utility model, along the radial direction of the main shaft 200, the length of the step structure 330 is L, which satisfies: 0.1mm≤L≤10mm; along the axial direction of the main shaft 200, the depth of the step structure 330 is M, which satisfies: 0.1mm≤M≤4mm. It should be noted that the length and depth of the first step structure 312 and the second step structure 322 both meet the above range, and are suitable for drainage pumps 2000 with a head of 0.6m or less, which can improve the drainage efficiency of the drainage pump 2000. When L is less than 0.1mm, the contact area between the main blade 300 and the water-gas interface is large, and the noise increases; when L is greater than 10mm, the working area of ​​the main blade 300 and the water flow is small, and the performance loss is large. By reasonably designing the range of the length L of the step structure 330, it is possible to reduce the contact area with the water-gas interface while ensuring that the working area of ​​the main blade 300 and the water flow is within a suitable range to reduce performance loss. When M is less than 0.1 mm, the contact area between the main blade 300 and the water-gas interface is large, and the noise increases; when M is greater than 4 mm, the working area between the main blade 300 and the water flow is small, and the performance loss is large. By reasonably designing the range of the depth M of the step structure 330, it is possible to ensure that the main blade 300 has a certain working area while reducing the contact area with the water-gas interface to reduce noise.

[0055] Reference Figure 2 and Figure 3 As shown, in the embodiment of the utility model, the turntable 100 is provided with a through hole 112, and the through hole 112 is located between the adjacent first blade 310 and the second blade 320, for example, the through hole 112 is located at the position of the turntable 100 close to the guide ring 120. It can be understood that the through hole 112 connects the upper and lower ends of the turntable 100, and is used to balance the air pressure inside and outside the impeller 1000. When water and air are sucked into the water chamber 130 together, the air can be discharged to the outside of the water chamber 130 through the through hole 112, and the water is thrown out from the upper side of the water chamber 130. Therefore, the through hole 112 plays a role in balancing the pressure difference of the impeller 1000, reducing the axial force, and at the same time reducing the vibration caused by the pressure difference, thereby reducing the noise of the impeller 1000 when it is working. Since the water flow speed gradually increases along the radial direction of the first blade 310 and the second blade 320, the through hole 112 is arranged at a position of the turntable 100 close to the guide ring 120, that is, when the through hole 112 is located at the edge of the turntable 100, the gas is easier to discharge and the exhaust efficiency is higher.

[0056] Reference Figure 4As shown, in order to further improve the exhaust effect, in the embodiment of the utility model, a plurality of through holes 112 are provided, and the plurality of through holes 112 are arranged at intervals along the circumference of the rotating shaft, for example, one or more through holes 112 are arranged between each adjacent first blade 310 and second blade 320. A plurality of through holes 112 are provided to improve the exhaust efficiency and further reduce the noise. The axis of the through hole 112 is parallel to the axis of the main shaft 200, so the water throwing angle of the first blade 310 and the second blade 320 is arranged at an angle to the axis of the through hole 112, so that the thrown water cannot directly enter the through hole 112, and it is difficult to produce a whistling sound when the water-gas mixture quickly passes through the narrow through hole 112, further reducing the noise of the impeller 1000 when it is working.

[0057] In an embodiment of the utility model, the through hole 112 can be a circular hole with an aperture of 1mm-3mm, for example, it can be 1.2mm, 1.5mm, 1.8mm, 2mm, 2.5mm, etc. When the aperture of the through hole 112 is greater than 3mm, it is easy to reduce the suction of the impeller 1000, thereby reducing the head and drainage volume of the drainage pump 2000. When the aperture of the through hole 112 is less than 1mm, the gas discharge effect is not obvious, and it is difficult to balance the air pressure. Among them, the aperture size of the through hole 112 can be set according to the water flow velocity. The larger the water flow velocity, the larger the aperture of the through hole 112 is set; the smaller the water flow velocity, the smaller the aperture of the through hole 112 is set. Therefore, setting the aperture of the through hole 112 within the range of 1mm-3mm can ensure that the suction of the impeller 1000 is within a suitable range, and can also balance the air pressure inside and outside the impeller 1000. In another embodiment, the cross-section of the through hole 112 may also be in the shape of an ellipse, rectangle, triangle, rhombus, trapezoid, etc. The size and shape of each through hole 112 may be the same or different. The appropriate solution is selected according to the actual situation.

[0058] Reference Figure 3 As shown, in an embodiment of the utility model, the outer wall of the main shaft 200 is provided with a plurality of water inlet blades 210, and the plurality of water inlet blades 210 are located on the side of the main shaft 200 away from the water passage chamber 130. And the plurality of water inlet blades 210 are radially distributed along the circumference of the main shaft 200 and connected to the corresponding first blades 310, and the connection method can be integrally formed. Along the radial direction of the main shaft 200, the length of the water inlet blades 210 is less than the length of the first blades 310. It can be understood that during the operation of the impeller 1000, the water inlet blades 210 are inserted into the water, and when the impeller 1000 rotates, the water inlet blades 210 are driven to rotate synchronously, so that the water inlet blades 210 stir the water surface and suck water into the water passage chamber 130, so that the water inlet blades 210 play a role of drainage, which can improve the water absorption efficiency.

[0059] In order to improve the effect of drainage, continue to refer to Figure 3As shown, in the embodiment of the utility model, along the water flow direction, that is, from bottom to top, the radial length of the water inlet blade 210 along the main shaft 200 gradually increases, and is smoothly transitioned and connected with the first blade 310, so that the water sucked along the water inlet blade 210 is transferred to the first blade 310, and then thrown out of the water cavity 130 through the first blade 310. Therefore, the drainage effect can be improved and the water absorption efficiency can be improved.

[0060] Reference Figure 1 As shown, a drainage pump 2000 of an embodiment of the utility model can be used in home appliances such as air conditioners, washing machines, and dishwashers. The drainage pump 2000 includes a housing 2100, a pump cover 2120, a motor 2200, and the impeller 1000 of the above embodiment. The housing 2100 is provided with a mounting cavity 2110. The pump cover 2120 is connected to the lower end of the housing 2100 and forms a drainage cavity 2130 with the housing 2100. A sealing ring 2300 for sealing is provided between the pump cover 2120 and the housing 2100. The pump cover 2120 is provided with a water inlet 2121 and a water outlet 2122, and the water inlet 2121 and the water outlet 2122 are both connected to the drainage cavity 2130. The motor 2200 is arranged in the mounting cavity 2110, and the rotating shaft 2210 of the motor 2200 extends from the mounting cavity 2110 into the drainage cavity 2130. The impeller 1000 is installed in the drainage chamber 2130, the water inlet blade 210 of the impeller 1000 is arranged in the water inlet 2121, and the main shaft 200 of the impeller 1000 is connected to the rotating shaft 2210. When the motor 2200 drives the impeller 1000 to rotate through the rotating shaft 2210, water is sucked into the water passage chamber 130 of the impeller 1000 from the water inlet 2121, and then the water is thrown out into the drainage chamber 2130 through the first blade 310, and finally discharged from the water outlet 2122.

[0061] The housing 2100, the pump cover 2120 and the impeller 1000 can be made of plastic, which can reduce the production cost and the overall weight of the drainage pump 2000. The pump cover 2120 and the housing 2100 can be connected by clamping, screw connection, or bonding. The motor 2200 can be a single-phase permanent magnet synchronous motor 2200, an asynchronous motor 2200, etc.

[0062] The drainage pump 2000 of the present application adopts the impeller 1000 of the above embodiment, and the impeller 1000 is provided with a main shaft 200 penetrating the water hole 111 of the rotating disk 100, and a water cavity 130 is formed between the guide ring 120 and the rotating disk 100, the water cavity 130 is connected with the water hole 111, and a plurality of main blades 300 are provided in the water cavity 130. When the impeller 1000 rotates, water is sucked into the water cavity 130 through the water hole 111, and then thrown out from the water cavity 130. Under the critical state, a water-gas interface will appear along the radial direction of the main shaft 200, and when the main blade 300 stirs the water-gas interface, it will cause increased noise. Therefore, a step structure 330 is set at the end of the main blade 300 away from the main shaft 200 to reduce the contact area between the main blade 300 and the water-gas interface, thereby reducing the disturbance of the water-gas interface by the main blade 300, improving the stability of the water-gas interface, and facilitating the smooth flow of water in the drainage pump 2000, reducing energy loss, and improving the working efficiency of the drainage pump 2000. At the same time, it can reduce the peak noise in the critical state and enhance the user experience.

[0063] Since the drainage pump 2000 adopts all the technical solutions of the impeller 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.

[0064] An air conditioner of an embodiment of the utility model comprises a drainage pump 2000 of the above embodiment, wherein the drainage pump 2000 is provided with a main shaft 200 penetrating through the water hole 111 of the rotating disk 100, a water cavity 130 is formed between the guide ring 120 and the rotating disk 100, the water cavity 130 is connected with the water hole 111, and a plurality of main blades 300 are provided in the water cavity 130. When the impeller 1000 rotates, water is sucked into the water cavity 130 through the water hole 111, and then thrown out from the water cavity 130. Under the critical state, a water-gas interface will appear along the radial direction of the main shaft 200, and when the main blade 300 stirs the water-gas interface, it will cause increased noise. Therefore, a step structure 330 is set at the end of the main blade 300 away from the main shaft 200 to reduce the contact area between the main blade 300 and the water-gas interface, thereby reducing the disturbance of the water-gas interface by the main blade 300, improving the stability of the water-gas interface, and facilitating the smooth flow of water in the drainage pump 2000, reducing energy loss, and improving the working efficiency of the drainage pump 2000. At the same time, it can reduce the peak noise in the critical state and enhance the user experience.

[0065] Since the air conditioner adopts all the technical solutions of the drainage pump 2000 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 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. Impeller, characterized in that: include: The turntable is provided with a water hole; A main shaft is passed through the water hole; A guide ring is arranged around the outer circumference of the rotating disk, and a water passage cavity connected with the water passage hole is formed between the guide ring and the rotating disk; A plurality of main blades are connected to the bottom wall of the water passage chamber, the plurality of main blades are radially arranged along the circumference of the main shaft, the ends of the main blades away from the main shaft are spaced apart from the guide ring, and at least some of the ends of the main blades away from the main shaft are provided with at least one step structure extending toward the bottom wall.

2. The impeller according to claim 1, characterized in that: At least two of the plurality of main blades are first blades, and one end of at least two of the first blades is connected to the main shaft, and the other end is provided with the step structure.

3. The impeller according to claim 2, characterized in that: Along the axial direction of the main shaft, the height of the first blade is H1, and the shortest distance between the step surface of the step structure of the first blade and the bottom wall of the water passage chamber is h1, satisfying: 0<h1 / H1≤0.

95.

4. The impeller according to claim 2, characterized in that: A portion of the plurality of main blades are the first blades, and another portion are second blades. At least one second blade is arranged between two adjacent first blades. The second blade is connected to the bottom wall of the water passage cavity and is spaced apart from the main shaft.

5. The impeller according to claim 4, characterized in that: The step structure is disposed at one end of the second blade away from the main shaft.

6. The impeller according to claim 5, characterized in that: Along the axial direction of the main shaft, the height of the second blade is H2, and the shortest distance between the step surface of the step structure of the second blade and the bottom wall of the water passage chamber is h2, satisfying: 0<h2 / H2≤0.

95.

7. The impeller according to claim 4, characterized in that: Along the radial direction of the main shaft, the end of the first blade away from the main shaft is the first end, the end of the second blade away from the main shaft is the second end, and the maximum distance between the first end and the outer wall of the main shaft is greater than or equal to the maximum distance between the second end and the outer wall of the main shaft.

8. The impeller according to claim 1, characterized in that: Along the radial direction of the main shaft, the length of the step structure is L, satisfying: 0.1mm≤L≤10mm; and / or, along the axial direction of the main shaft, the depth of the step structure is M, satisfying: 0.1mm≤M≤4mm.

9. The impeller according to claim 4, characterized in that: The rotating disk is provided with a through hole, and the through hole is located between adjacent first blades and second blades.

10. The impeller according to claim 1, characterized in that: The outer wall of the main shaft is provided with a plurality of water inlet blades, and the plurality of water inlet blades are located at one end of the main shaft away from the water passage chamber.

11. A drainage pump, characterized in that: include: A housing having a mounting cavity; 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 disposed in the drainage chamber, and the main shaft is connected to the rotating shaft.

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

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