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, a first water passing hole is formed in the center of the rotating disc, the main shaft penetrates through the first water passing hole and is coaxial with the rotating disc, and the water inlet blade is arranged on the water inlet side of the first water passing hole and is connected with the main shaft. The multiple main blades are connected to the side, back on to the water inlet blade, of the rotary disc, the multiple main blades are radially distributed in the circumferential direction of the main shaft, the flow guide ring surrounds the outer circumferential edge of the rotary disc, the flow guide ring is provided with an outer circumferential face and an inner circumferential face, the flow guide ring is provided with multiple second water passing holes penetrating through the outer circumferential face and the inner circumferential face, and the multiple second water passing holes are distributed in the circumferential direction of the rotary disc. According to the utility model, the water-gas boundary can deviate from the main blade, so that the interaction between the blade and the water-gas boundary is weakened, and the noise generated by the impeller 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 an air conditioner operates, condensed water is generated. The condensed water accumulates in a water receiving tray and is discharged through a drainage pump. There is both water and gas inside the drainage pump. When the water level in the water receiving tray is lower than the suctionable water level of the drainage pump, the drainage pump cannot suck the condensed water in the water receiving tray. Since the drainage pump keeps running, a certain drainage height is maintained in the drainage pipe connected to the drainage pump but no water is discharged. At this time, the water and gas inside the drainage pump reach a relatively balanced state, which is simply referred to as the "critical state". Moreover, there is a relatively obvious water-gas demarcation line between the water and gas inside the drainage pump. When the impeller of the drainage pump rotates, its blades will interact with the water-gas demarcation line, thus generating noise. Content of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides an impeller, which can make the water-gas demarcation line deviate from the main blades, thereby weakening the interaction between the blades and the water-gas demarcation line and reducing the noise generated by the impeller.

[0004] The utility model also provides a drainage pump with the above impeller.

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

[0006] The impeller according to the first aspect embodiment of the utility model includes: a turntable, a first water passing hole is provided at the center of the turntable; a main shaft, passing through the first water passing hole and coaxially arranged with the turntable; an inlet blade, arranged on the water inlet side of the first water passing hole and connected to the main shaft; a plurality of main blades, connected to the side of the turntable facing away from the inlet blade, and the plurality of main blades are radially arranged along the circumferential direction of the main shaft; a guide ring, surrounding the outer peripheral edge of the turntable, the guide ring is spaced from the main blades, the guide ring has an outer peripheral surface and an inner peripheral surface, and the guide ring is provided with a plurality of second water passing holes penetrating through the outer peripheral surface and the inner peripheral surface, and the plurality of second water passing holes are arranged along the circumferential direction of the turntable.

[0007] The impeller according to the embodiment of the first aspect of the present utility model has at least the following beneficial effects: By arranging the second water passing holes on the guide ring, when the impeller rotates, the water flow in the turntable can be discharged through the second water passing holes, so that the water-gas boundary line deviates from the end of the main blade close to the guide ring. It can also be understood that the water-gas boundary line is closer to the inner circumferential surface of the guide ring, and the water-gas boundary line is farther from the end of the main blade close to the guide ring, making it difficult for the main blade to interact with the water-gas boundary line, which can reduce noise. In addition, the second water passing holes can also reduce the pressure difference between the inner and outer ends of the guide ring, thereby reducing pressure pulsation and further reducing noise.

[0008] According to some embodiments of the present utility model, the main blade and the guide ring are arranged at intervals, and along the radial direction of the turntable, at least one of the second water passing holes is arranged opposite to the end of the main blade facing the guide ring.

[0009] According to some embodiments of the present utility model, the multiple main blades are divided into multiple first blades and multiple second blades, and the multiple first blades and the multiple second blades are arranged alternately along the circumferential direction 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 arranged at intervals with the main shaft. Along the radial direction of the turntable, the second water passing hole is arranged opposite to the end of the first blade facing the guide ring, or the second water passing hole is arranged opposite to the end of the second blade facing the guide ring.

[0010] According to some embodiments of the present utility model, the distance between the first blade and the guide ring is less than or equal to the distance between the second blade and the guide ring.

[0011] According to some embodiments of the present utility model, along the circumferential direction of the turntable, the multiple second water passing holes and the multiple main blades are arranged alternately along the circumferential direction of the turntable.

[0012] According to some embodiments of the present utility model, along the radial direction of the turntable, the axis of the second water passing hole intersects with the central axis of the turntable.

[0013] According to some embodiments of the present utility model, the cross-section of the second water passing hole is quadrilateral, and the cross-sectional contour line of the second water passing hole has a first side line, a second side line, a third side line and a fourth side line. The first side line and the second side line are spaced and parallel along the height direction of the guide ring, and the third side line and the fourth side line are spaced and parallel along the circumferential direction of the guide ring, and the third side line and the fourth side line are inclined from bottom to top along the rotation direction of the turntable.

[0014] According to some embodiments of the present utility model, the included angle between the third side line and the central axis of the turntable is greater than or equal to 5° and less than or equal to 85°.

[0015] The drainage pump according to the second aspect embodiment of the present utility model includes: a housing, provided with an installation cavity inside; a pump cover, connected to the housing and forming a drainage cavity with the housing, the pump cover being provided with a water inlet and a water outlet communicating with the drainage cavity; a motor, arranged in the installation cavity, the rotating shaft of the motor extending from the installation cavity into the drainage cavity; an impeller according to the first aspect embodiment, the impeller being arranged in the drainage cavity, the main shaft being connected to the rotating shaft, and the inlet vanes being arranged towards the water inlet.

[0016] The drainage pump according to the second aspect embodiment of the present utility model has at least the following beneficial effects: The drainage pump adopts the impeller of the first aspect embodiment. By optimizing the structure of the impeller, the water-gas demarcation line deviates from the end of the main vane close to the guide ring, which can also be understood as the water-gas demarcation line is closer to the inner circumferential surface of the guide ring and away from the end of the main vane. This makes it difficult for the main vane to stir the water-gas demarcation line, which can reduce noise. In addition, the second water passing hole can also reduce the pressure difference between the inner and outer ends of the guide ring, thereby reducing pressure pulsation and reducing the noise generated by the drainage pump.

[0017] The air conditioner according to the third aspect embodiment of the present utility model includes the drainage pump of the second aspect embodiment.

[0018] The air conditioner according to the third aspect embodiment of the present utility model has at least the following beneficial effects: Since the impeller in the drainage pump has been structurally optimized, the noise generated by the drainage pump is reduced, the stability of the air conditioner is improved, the overall noise level of the air conditioner is reduced, and a better user experience is provided for users.

[0019] The additional aspects and advantages of the present utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present utility model. Description of the Drawings

[0020] The following further describes the present utility model in conjunction with the drawings and embodiments, where:

[0021] Figure 1 It is a schematic structural diagram of an impeller according to some embodiments of the present utility model;

[0022] Figure 2 It is a schematic structural diagram of an impeller according to some embodiments of the present utility model;

[0023] Figure 3 It is a top view of an impeller according to some embodiments of the present utility model;

[0024] Figure 4 Top view of the impeller according to some embodiments of the present utility model;

[0025] Figure 5 Schematic structural diagram of the impeller according to some embodiments of the present utility model;

[0026] Figure 6 Schematic structural diagram of the impeller according to some embodiments of the present utility model;

[0027] Figure 7 Schematic structural diagram of the impeller according to some embodiments of the present utility model;

[0028] Figure 8 Schematic structural diagram of the impeller according to some embodiments of the present utility model;

[0029] Figure 9 Schematic structural diagram of the impeller according to some embodiments of the present utility model;

[0030] Figure 10 is Figure 9 Enlarged view of position A in

[0031] Figure 11 Cross-sectional view of the drainage pump according to some embodiments of the present utility model.

[0032] Reference numerals:

[0033] Drainage pump 1000;

[0034] Impeller 100, turntable 110, first surface 111, second surface 112, first water passage hole 113, main shaft 120, guide ring 130, outer peripheral surface 131, inner peripheral surface 132, second water passage hole 133, first side line 134, second side line 135, third side line 136, fourth side line 137, main blade 140, first blade 141, second blade 142, inlet blade 150;

[0035] Housing 200, installation cavity 210;

[0036] Pump cover 300, drainage cavity 310, water inlet 311, water outlet 312;

[0037] Motor 400, rotating shaft 410. Detailed implementation manners

[0038] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0039] In the description of the present utility model, it should be understood that for the orientation descriptions, such as the upper, lower, circumferential, radial, etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0040] In the description of the present utility model, the meaning of "several" is one or more, the meaning of "multiple" is two or more. Understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0041] In the description of the present utility model, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meaning of the above words in the present utility model in combination with the specific content of the technical solution.

[0042] Refer to Figure 1 As shown, the impeller 100 of the embodiment of the present utility model is mainly used in the drainage pump of an air conditioner, and the drainage pump is used to drain the condensed water in the water receiving tray. The impeller 100 includes a turntable 110, a main shaft 120, a guide ring 130, inlet vanes 150 and a plurality of main vanes 140. The turntable 110 can be understood as having a disc structure. The turntable 110 has a first surface 111 and a second surface 112 arranged back to back. 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 a plane, an inclined plane or a curved surface. The turntable 110 is provided with a first water passing hole 113 penetrating through the first surface 111 and the second surface 112. The first water passing hole 113 is located at the center position of the turntable 110. The first water passing 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 first water passing hole 113 is used for water flow or air flow to pass through from bottom to top.

[0043] Refer to Figure 1As shown, specifically, the main shaft 120 is used to connect to the output shaft of the motor. The main shaft 120 is vertically arranged and passes through the first water passage hole 113. The upper end of the main shaft 120 protrudes outside the turntable 110. 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 first water passage hole 113 is larger than the shaft diameter of the main shaft 120. Therefore, the gap formed between the inner wall of the first water passage hole 113 and the outer peripheral wall of the main shaft 120 can allow water flow to pass through. The water inlet blade 150 is arranged on the water inlet side of the first water passage 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 and also extends along the radial direction of the main shaft 120. During actual use, the water inlet blade 150 will be immersed in the condensed water in the water receiving tray. A plurality of main blades 140 are all connected to the first surface 111. The plurality of main blades 140 are arranged radially along the circumferential direction of the main shaft 120. The main blades 140 extend along the radial direction of the main shaft 120. The guide ring 130 is of an annular structure, specifically, it can be a circular ring structure. 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 turntable 110. And the guide ring 130 extends upward. It can be understood that the guide ring 130 surrounds the plurality of main blades 140. The height of the guide ring 130 is greater than the height of the main blades 140. There is a spacing between the end of the main blade 140 away from the main shaft 120 and the guide ring 130.

[0044] 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. A negative pressure is generated on the water inlet side of the first water passing 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. The water inlet blades 150 play a role in guiding the flow. The water flow or air flow passes through the first water passing hole 113 from bottom to top and flows out of the water outlet side of the first water passing 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 central position of the turntable 110 to the edge position of the turntable 110. The water flow or air flow will flow to the position of the guide ring 130. It can also be understood that the main blades 140 throw the water flow or air flow on their surfaces to the guide ring 130. Since the guide ring 130 extends upward and has an inner peripheral surface 132, the inner peripheral surface 132 of the guide ring 130 will block the water flow, and the water flow will move in a circular motion following the guide ring 130. Gradually, as the accumulated water flow increases, the water flow will gradually move upward along the inner peripheral surface 132 of the guide ring 130. When the position of the water flow is higher than the height of the guide ring 130, finally the water flow will radially move outward away from the guide ring 130 and flow out of the impeller 100, thus 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 1000 and generating noise.

[0045] It should be noted that there is both water and gas inside the impeller 100. When the turntable 110 rotates, due to the greater mass of water and the action of centrifugal force, the water is generally located near the edge of the turntable 110, and a water-gas boundary line will be formed between the water and the gas. A water flow surface will be formed at the water-gas boundary line. When the water level in the water receiving tray is lower than the suctionable water level of the drainage pump, due to the continuous operation of the drainage pump, a certain drainage height will be maintained in the drainage pipe connected to the outside of the drainage pump but no water will be discharged. At this time, the water and gas inside the impeller 100 reach a relatively balanced state, and this state is simply referred to as the "critical state".

[0046] 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 1000 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 1000.

[0047] It should be noted that when the impeller 100 rotates, the end surface of the main blade 140 close to the guide ring 130 will interact with the water-gas interface, and the main blade 140 will continuously cut into or separate from the water or gas, thereby generating turbulence or eddies, causing a sudden change in the flow rate of the water flow or air flow. At the same time, the friction and collision between the main blade 140 and the water and gas will generate noise.

[0048] Based on this, refer to Figure 1 As shown, the guide ring 130 is provided with a second water passage hole 133, and the second water passage hole 133 penetrates the outer circumference 131 and the inner circumference 132 of the guide ring 130. The second water passage hole 133 is used for air flow or water flow to pass through. When the impeller 100 rotates, due to the blocking effect of the guide ring 130, the water flow will accumulate on the inner circumference 132 of the guide ring 130, and the water flow at the position of the guide ring 130 can be directly discharged from the second water passage hole 133. It can be understood that the content of the water flow at the position of the guide ring 130 is reduced, and the water-gas boundary line moves toward the inner circumference 132 of the guide ring 130, or it can be understood that the water-gas boundary line expands toward the outer circle, and the distance between the main blade 140 and the water-gas boundary line increases. The main blade 140 is not easy to interact with the water-gas interface, and the main blade 140 is not easy to stir the water flow surface at the water-gas interface to generate bubbles, which can reduce the noise generated by the main blade 140. In this embodiment, by opening the second water hole 133 on the guide ring 130 , the water-gas interface can be deviated from the main blade 140 and close to the end surface of the guide ring 130 , thereby weakening the interaction between the main blade 140 and the water-gas interface.

[0049] In addition, since the second water passing hole 133 allows air flow or water flow to pass through, the second water passing hole 133 can reduce the pressure difference between the inner and outer sides of the flow guiding ring 130, thereby reducing pressure pulsation and further reducing noise. When the pressure difference between the inner and outer sides of the flow guiding ring 130 is large, the air flow or water flow can directly pass through the second water passing hole 133, thereby balancing the pressure difference between the inner and outer sides.

[0050] It can be understood that, with reference to Figure 1 and Figure 3 shown, in some embodiments, the main blade 140 is arranged at an interval from the flow guiding ring 130. It can also be understood that there is a spacing between the end of the main blade 140 away from the main shaft 120 and the flow guiding ring 130. The second water passing hole 133 is arranged at the spacing between the main blade 140 and the flow guiding ring 130. Specifically, along the radial direction of the turntable 110, at least one second water passing hole 133 is arranged opposite to the end of the main blade 140 facing the flow guiding ring 130. It can be understood that along the radial direction of the turntable 110, the second water passing hole 133 is on one side and the main blade 140 is on the other side. It can also be understood that at least one second water passing hole 133 is arranged directly opposite to or facing the end of the main blade 140 close to the flow guiding ring 130. When the impeller 100 rotates, the bubbles generated by the end of the main blade 140 facing the flow guiding ring 130 due to agitating the water-air interface can directly pass through the second water passing hole 133, so that the main blade 140 is not easy to break the bubbles, and the noise can be further reduced.

[0051] With reference to Figure 1 shown, in some embodiments, the number of the second water passing holes 133 is multiple, and the multiple second water passing holes 133 are arranged at intervals along the circumferential direction of the flow guiding ring 130, which can enable the second water passing holes 133 to widely cover the above-mentioned water-air interface. It can be understood that the multiple second water passing holes 133 surround the water-air interface for one week. Specifically, the multiple second water passing holes 133 can be arranged at equal or unequal distances, and the apertures of the multiple second water passing holes 133 can be the same or different. In some other embodiments, the cross-section of the second water passing hole 133 can be circular, elliptical, quadrilateral or triangular.

[0052] It should be noted that, in some embodiments, the multiple second water passing holes 133 are arranged in one-to-one correspondence with the multiple main blades 140, and each second water passing hole 133 is directly opposite to or faces the end of a main blade 140 close to the flow guiding ring 130.

[0053] It can be understood that, with reference to Figure 1As 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. It can be understood that a part of the plurality of main blades 140 are the first blades 141 and another part are the second blades 142. The plurality of first blades 141 and the plurality of second blades 142 are arranged alternately along the circumferential direction of the turntable 110. The first blades 141 and the second blades 142 extend radially along the main shaft 120. Radially along the main shaft 120, the length of the first blades 141 is greater than the length of the second blades 142. The first blades 141 are connected to the main shaft 120, and the second blades 142 are arranged at intervals from the main shaft 120. The plurality of first blades 141 are arranged radially, and the plurality of second blades 142 are also arranged radially. The first blades 141 are arranged at intervals from the guide ring 130, and the second blades 142 are arranged at intervals from the guide ring 130. It can be understood that there is a distance between the end of the first blade 141 away from the main shaft 120 and the guide ring 130, and there is a distance between the end of the second blade 142 away from the main shaft 120 and the guide ring 130.

[0054] It can be understood that, with reference to Figure 1 and Figure 3 As shown, in some embodiments, the distance between the first blade 141 and the guide ring 130 is less than the distance between the second blade 142 and the guide ring 130. It can also be understood that the distance from the first blade 141 to the guide ring 130 is less than the distance from the second blade 142 to the guide ring 130. That is to say, 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. While the second blade 142 plays a guiding role, it is also far from the water-gas interface and avoids interacting with the water-gas interface, further reducing noise.

[0055] With reference to Figure 4 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 distance from the first blade 141 to the guide ring 130 is equal to the distance from the second blade 142 to the guide ring 130. The first blade 141 and the second blade 142 have a good guiding effect on the water flow.

[0056] It should be noted that in some embodiments, multiple second water passing holes 133 are arranged in one-to-one correspondence with multiple first blades 141. Each second water passing hole 133 faces or is oriented towards the end of a first blade 141 close to the flow guiding ring 130. Since the first blade 141 is closer to the flow guiding ring 130 than the second blade 142, it can also be understood that the distance between the first blade 141 and the second water passing hole 133 is smaller, which is more conducive to the bubbles generated by the end of the first blade 141 close to the flow guiding ring 130 due to agitating the water-gas interface to directly discharge through the second water passing hole 133, so that the first blade 141 is not likely to break the bubbles, and the noise can be further reduced. In some other embodiments, multiple second water passing holes 133 can also be arranged in one-to-one correspondence with multiple second blades 142. Each second water passing hole 133 faces or is oriented towards the end of a second blade 142 close to the flow guiding ring 130.

[0057] It can be understood that, referring to Figure 2 As shown, in some embodiments, along the circumferential direction of the turntable 110, multiple second water passing holes 133 and multiple main blades 140 are arranged alternately along the circumferential direction of the turntable 110, that is, the second water passing holes 133 are located between two adjacent main blades 140. It can also be understood that along the circumferential direction of the turntable 110, they are arranged in the form of second water passing hole 133 - main blade 140 - second water passing hole 133 - main blade 140 in sequence. Specifically, the second water passing holes 133 are located between adjacent first blades 141 and second blades 142. Multiple second water passing holes 133, multiple first blades 141 and multiple second blades 142 are arranged alternately along the circumferential direction of the turntable 110. It can also be understood that along the circumferential direction of the turntable 110, they are arranged in the form of second water passing hole 133 - first blade 141 - second water passing hole 133 - second blade 142 - second water passing hole 133 in sequence.

[0058] It can be understood that, referring to Figure 2 and Figure 3As shown, in some embodiments, the central axis X2 of the turntable 110 extends in the up-and-down direction. Along the radial direction of the turntable 110, the axis X1 of the second water passage hole 133 intersects with the central axis X2 of the turntable 110. It can also be understood that the turntable 110 rotates around the central axis X2, the axis X1 of the second water passage hole 133 is perpendicular to the central axis X2 of the turntable 110, and at the same time, the axis X1 of the second water passage hole 133 is horizontally arranged and still intersects with the central axis X2 of the turntable 110, so the guiding effect on the water flow is better, and the water flow can directly flow out along the second water passage hole 133. In some other embodiments, the axis X1 of the second water passage hole 133 can also be inclined. Specifically, the axis X1 of the second water passage hole 133 is inclined from the outside to the inside along the rotation direction of the impeller 100. Since the rotation direction of the impeller 100 is substantially the same as the flow direction of the water flow inside the impeller 100, it can make the axis X1 of the second water passage hole 133 inclined along the flow direction of the water flow, which can play a role in guiding the water flow.

[0059] It can be understood that, referring to Figure 6 and Figure 7 As shown, in some embodiments, the cross-section of the second water passage hole 133 is quadrilateral. Specifically, referring to Figure 8 and Figure 9 As shown, the cross-section of the second water passage hole 133 is a parallelogram. Referring to Figure 10 As shown, the cross-sectional contour line of the second water passage hole 133 has a first side line 134, a second side line 135, a third side line 136 and a fourth side line 137. The first side line 134 and the second side line 135 are arranged at intervals in the height direction of the guide ring 130. The height direction of the guide ring 130 is the Figure 9 up-and-down direction in Figure 9The rotation direction shown can be understood as being located on the circumferential surface of the turntable 110. In this embodiment, since the flow guide ring 130 and the main blade 140 drive the water flow in the turntable 110 to rotate together, and the flow direction of the water flow is substantially the same as the rotation direction of the turntable 110, it can be understood that the third side line 136 and the fourth side line 137 are inclined along the flow direction of the water flow, guiding the water flow, so that the water flow is not likely to directly impact the inner wall of the second water passing hole 133, and the noise can be reduced.

[0060] It can be understood that, on the basis of the above embodiment, with reference to Figure 9 and Figure 10 as shown, the third side line 136 forms an angle with the central axis X2 of the turntable 110, and this angle is greater than or equal to 5° and less than or equal to 85°. Since the third side line 136 is parallel to the fourth side line 137, the angle formed by the third side line 136 and the central axis X2 is equal to the angle formed by the fourth side line 137 and the central axis X2. It can also be understood that, within the second water passing hole 133, the angle between the side wall corresponding to the fourth side line 137 and the vertical plane is greater than or equal to 5° and less than or equal to 85°, and the angle between the side wall corresponding to the third side line 136 and the vertical plane is greater than or equal to 5° and less than or equal to 85°, so that the side wall corresponding to the third side line 136 and the side wall corresponding to the fourth side line 137 can be inclined generally along the flow direction of the water flow within a specific inclination range. When the water flow passes through the second water passing hole 133, the water flow is not likely to directly impact the inner wall of the second water passing hole 133, and the noise reduction effect can be further improved. For easy understanding, reference can be made to Figure 9 and Figure 10 as shown, draw an auxiliary line X3. The auxiliary line X3 is parallel to the central axis X2, and the angle α formed between the third side line 136 and the auxiliary line X3 is equal to the angle formed between the third side line 136 and the central axis X2, and the angle α satisfies: 5° ≤ α ≤ 85°.

[0061] It can be understood that, with reference to Figure 5 and Figure 7 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 circumferential direction of the main shaft 120. In order to improve the water diversion effect, the width of the water inlet blades 150 can gradually increase from bottom to top and have a smooth overall transition. In some embodiments, the number of the water inlet blades 150 is four, and the four water inlet blades 150 are arranged at intervals of 90 degrees. It can be understood that the four water inlet blades 150 are arranged in a cross-shaped structure.

[0062] In some embodiments, to improve the structural strength of the impeller 100, the impeller 100 can be formed into an integral structure through an integral molding process. For example, the impeller 100 can be a plastic part and is integrally formed by an injection molding process. Optionally, the impeller 100 can also be integrally formed by other methods. For example, the impeller 100 can be a metal part, and in this case, an integral structure can be formed through processes such as forging.

[0063] Referring Figure 11 As shown, the drainage pump 1000 of the embodiment of the present utility model includes a housing 200, a pump cover 300, a motor 400, and the impeller 100 of the above embodiment. Specifically, an installation 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. An inlet 311 communicating with the drainage cavity 310 is provided at the bottom of the pump cover 300. An outlet 312 communicating with the drainage cavity 310 is provided at the side of the pump cover 300. The motor 400 is disposed in the installation cavity 210. The rotating shaft 410 of the motor 400 extends from the installation cavity 210 into the drainage cavity 310. The impeller 100 is disposed in the drainage cavity 310. The main shaft 120 is connected to the rotating shaft 410. The inlet blades 150 are arranged facing the inlet 311.

[0064] 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 elaborated here.

[0065] The embodiment of the present utility model also provides an air conditioner, which includes a water receiving tray and the drainage pump 1000 of the above embodiment. Among them, the water receiving tray is used to collect condensed water. The inlet 311 of the drainage pump 1000 is communicated with the water receiving tray, so as to drain the condensed water in the water receiving tray. Specifically, the air conditioner in this embodiment can be a mobile air conditioner or an air conditioner indoor unit and other air conditioning devices. This embodiment does not make any limitations in this regard.

[0066] 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 elaborated here.

[0067] The above has described the embodiments of the present utility model in detail with reference to the drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the purpose of the present utility model.

Claims

1. An impeller, characterized in that: include: A rotating disk, wherein a first water hole is provided at the center of the rotating disk; A main shaft, passing through the first water hole and coaxially arranged with the rotating disk; A water inlet blade, provided at the water inlet side of the first water hole and connected to the main shaft; A plurality of main blades are connected to a side of the rotating disk facing away from the water inlet blades, and the plurality of main blades are radially arranged along the circumference of the main shaft; A guide ring is arranged around the outer circumference of the turntable, the guide ring is spaced apart from the main blades, the guide ring has an outer circumferential surface and an inner circumferential surface, the guide ring is provided with a plurality of second water holes penetrating the outer circumferential surface and the inner circumferential surface, and the plurality of second water holes are arranged along the circumference of the turntable.

2. The impeller according to claim 1, characterized in that: Along the radial direction of the rotating disk, at least one of the second water passing holes is arranged opposite to the end of the main blade facing the guide ring.

3. The impeller according to claim 2, characterized in that: 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 rotating disk. 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. Along the radial direction of the rotating disk, the second water passing hole is arranged opposite to the end of the first blade facing the guide ring, or the second water passing hole is arranged opposite to the end of the second blade facing the guide ring.

4. The impeller according to claim 3, characterized in that: The distance between the first blade and the guide ring is less than or equal to the distance between the second blade and the guide ring.

5. The impeller according to claim 1, characterized in that: Along the circumference of the rotating disk, a plurality of the second water holes and a plurality of the main blades are alternately arranged along the circumference of the rotating disk.

6. The impeller according to claim 1, characterized in that: Along the radial direction of the rotating disk, the axis of the second water passage hole is arranged to intersect with the central axis of the rotating disk.

7. The impeller according to claim 1, characterized in that The cross section of the second water passing hole is a quadrilateral, and the cross-sectional contour line of the second water passing hole has a first side line, a second side line, a third side line and a fourth side line, the first side line and the second side line are spaced and parallel along the height direction of the guide ring, the third side line and the fourth side line are spaced and parallel to each other along the circumference of the guide ring, and the third side line and the fourth side line are inclined from bottom to top along the rotation direction of the turntable.

8. The impeller according to claim 7, characterized in that An included angle between the third side line and the central axis of the turntable is greater than or equal to 5° and less than or equal to 85°.

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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