Draining pump and air conditioner

Abstract

The utility model discloses a drainage pump and an air conditioner, and relates to the technical field of air conditioning equipment, the drainage pump comprises a shell, an impeller, a motor and a drainage structure, a first mounting cavity and a second mounting cavity are arranged in the shell, a water inlet part of the shell is connected to one end of the first mounting cavity, and an inner cavity of the water inlet part is communicated with the first mounting cavity. The impeller is mounted in the first mounting cavity, and the motor is mounted in the second mounting cavity and used for driving the impeller to rotate. A drainage channel of the drainage structure is arranged in the vertical direction, and the two ends of the drainage channel communicate with the drainage part and a water outlet located in the peripheral wall of the first installation cavity correspondingly. Due to the fact that the drainage channel is arranged in the vertical direction, water directly flows upwards when the drainage pump drains water, the distance of the water flowing out of the drainage pump is short, and therefore on-way loss can be reduced, the drainage pump can obtain higher lift, and the performance of the drainage pump is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning equipment, and particularly relates to a drainage pump and an air conditioner. Background Art

[0002] In the related art, in the refrigeration mode of an air conditioner, the air in the indoor environment exchanges heat with the heat exchanger to generate condensed water, and the condensed water accumulates in the water receiving tray; in order to prevent the condensed water from accumulating too much and overflowing the water receiving tray, some air conditioners use a drainage pump to drain the condensed water. The drainage channel of the existing drainage pump is relatively long, the movement resistance of the water flow is large, and the head loss along the way increases, resulting in a lower head of the drainage pump. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a drainage pump capable of increasing the head of the drainage pump.

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

[0005] The drainage pump according to the first aspect embodiment of the utility model includes: a housing internally provided with a first installation cavity and a second installation cavity, the housing including a water inlet part and a drainage part, the water inlet part being located at one end of the housing close to the first installation cavity, and the inner cavity of the water inlet part communicating with the first installation cavity;

[0006] An impeller including a large-diameter blade part and a small-diameter blade part connected along the rotation axis of the impeller, the large-diameter blade part being located in the first installation cavity, and the small-diameter blade part being located in the inner cavity of the water inlet part;

[0007] A motor installed in the second installation cavity, the motor being configured to be able to drive the impeller to rotate;

[0008] A drainage structure connected to the housing and internally provided with a vertically arranged drainage channel, the drainage channel being spaced apart from the second installation cavity;

[0009] Wherein, a water outlet is provided on the peripheral wall of the first installation cavity, one end of the drainage channel communicates with the first installation cavity through the water outlet, and the other end communicates with the inner cavity of the drainage part.

[0010] The drainage pump according to the embodiment of the utility model has at least the following beneficial effects:

[0011] By providing a first installation cavity and a second installation cavity inside the housing, the water inlet part of the housing is connected to one end of the first installation cavity, and the inner cavity of the water inlet part communicates with the first installation cavity. The impeller is installed in the first installation cavity, and the motor is installed in the second installation cavity and is used to drive the impeller to rotate. The drainage channel of the drainage structure is arranged in the vertical direction, and both ends of the drainage channel communicate with the drainage part and the water outlet on the peripheral wall of the first installation cavity respectively. When the motor drives the impeller to rotate, a negative pressure is generated in the first installation cavity, so that water is sucked from the water inlet part into the first installation cavity. Then the water flow enters the water inlet channel through the water outlet, and finally is discharged from the drainage pump through the drainage part. Since the drainage channel is arranged in the vertical direction, the water directly flows upward when the drainage pump discharges water, and the distance that the water flow travels when discharging from the drainage pump is shorter. Therefore, the frictional loss can be reduced, the drainage pump can obtain a higher head, and the performance of the drainage pump can be improved.

[0012] According to some embodiments of the present invention, the minimum distance between the outer peripheral wall of the large-diameter blade part and the peripheral wall of the first installation cavity is a, satisfying: 1mm ≤ a ≤ 3mm; and / or,

[0013] The minimum height of the water outlet in the direction of the rotation axis is b, satisfying: 5mm ≤ b ≤ 10mm.

[0014] According to some embodiments of the present invention, the minimum height of the water outlet in the direction of the rotation axis is b, the maximum outer diameter of the impeller is D1, and the maximum inner diameter of the first installation cavity is D2, satisfying: 。

[0015] According to some embodiments of the present invention, the drainage structure is arranged inside the second installation cavity, and the drainage channel is arranged parallel to the rotation axis.

[0016] According to some embodiments of the present invention, the large-diameter blade part includes a surrounding edge arranged around the rotation axis, and the top wall of the surrounding edge is inclined downward in the direction close to the rotation axis.

[0017] According to some embodiments of the present invention, the bottom wall of the large-diameter blade part is configured as a circular ring and has a non-porous structure.

[0018] According to some embodiments of the present invention, in the projection plane perpendicular to the rotation axis, the distance between the projections of the two side walls of the water outlet opposite to each other in the circumferential direction of the rotation axis gradually increases from the inside to the outside.

[0019] According to some embodiments of the present invention, the bottom wall of the water outlet is arc-shaped; and / or,

[0020] The top wall of the drainage channel is arc-shaped, and the plane where the inlet of the drainage channel is located is perpendicular to the plane where the outlet of the drainage channel is located.

[0021] According to some embodiments of the present utility model, the drainage part is located on the side wall of the housing. The inner cavity of the drainage part includes a first drainage section provided at the outlet of the drainage channel, and the cross-sectional area of the first drainage section gradually increases along the drainage direction.

[0022] According to some embodiments of the present utility model, the inner cavity of the drainage part further includes a second drainage section connected to the end of the first drainage section away from the drainage channel, and the cross-sectional area of the second drainage section is larger than the maximum cross-sectional area of the first drainage section.

[0023] According to some embodiments of the present utility model, the housing includes:

[0024] An impeller housing, including the water inlet part and a support part located at one end away from the water inlet part. The water outlet is provided at the support part, and a positioning groove is arranged circumferentially along the rotation axis in the impeller housing;

[0025] A water pump bracket, including a protruding part protruding towards the impeller housing. The drainage structure is fixedly connected inside the protruding part and fits against the end face of the support part; the protruding part and the drainage structure together form a positioning protrusion that cooperates with the positioning groove, and a sealing ring is provided between the positioning groove and the positioning protrusion.

[0026] According to some embodiments of the present utility model, a sealing structure is provided at the connection between the drainage structure and the support part.

[0027] According to some embodiments of the present utility model, a boss is provided at the end of the protruding part, and the boss is snap-connected to the inner wall of the first installation cavity.

[0028] An air conditioner according to the second aspect embodiment of the present utility model includes the drainage pump described in the above embodiments.

[0029] The air conditioner according to the embodiments of the present utility model has at least the following beneficial effects:

[0030] The drainage pump of the first embodiment is adopted. The drainage pump is provided with a first installation cavity and a second installation cavity inside the housing. The water inlet of the housing is connected to one end of the first installation cavity, and the inner cavity of the water inlet is connected to the first installation cavity. The impeller is installed in the first installation cavity, and the motor is installed in the second installation cavity and is used to drive the impeller to rotate. The drainage channel of the drainage structure is arranged in the vertical direction, and the two ends of the drainage channel are respectively connected to the drainage portion and the water outlet located on the peripheral wall of the first installation cavity. When the motor drives the impeller to rotate, a negative pressure is generated in the first installation cavity, so that water is sucked from the water inlet into the first installation cavity, and then the water flows into the water inlet channel through the water outlet, and finally discharged from the drainage pump through the drainage portion. Since the drainage channel is arranged in the vertical direction, the water flows directly upward when the drainage pump is drained, and the distance traveled by the water flow when it is discharged from the drainage pump is shorter, so that the loss along the way can be reduced, so that the drainage pump obtains a higher head and improves the performance of the drainage pump.

[0031] According to some embodiments of the utility model, the air conditioner also includes a casing, the drain pump also includes a fixing member and a buffer member, the casing includes a mounting seat, the buffer member is arranged between the mounting seat and the casing, the fixing member is arranged on a side of the mounting seat away from the buffer member, and the casing, the buffer member, the mounting seat and the fixing member are connected and fixed by fasteners.

[0032] 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

[0033] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0034] Figure 1 It is a cross-sectional schematic diagram of a drainage pump according to an embodiment of the utility model;

[0035] Figure 2 An exploded view of a drainage pump according to an embodiment of the utility model;

[0036] Figure 3 for Figure 1 The enlarged view of point A in the middle;

[0037] Figure 4 This is a schematic diagram of an impeller installed inside an impeller housing according to an embodiment of the utility model;

[0038] Figure 5 This is a top view of an impeller installed inside an impeller housing according to an embodiment of the utility model;

[0039] Figure 6 This is a schematic diagram of the structure of an impeller in one embodiment of the utility model;

[0040] Figure 7 Structural schematic diagram of an impeller of an embodiment of the present utility model from another perspective;

[0041] Figure 8 Exploded view of a partial structure of a drainage pump of an embodiment of the present utility model;

[0042] Figure 9 Structural schematic diagram of a housing of an embodiment of the present utility model;

[0043] Figure 10 Structural schematic diagram of a water pump bracket of an embodiment of the present utility model.

[0044] Reference numerals in the drawings:

[0045] Drainage pump 1000;

[0046] Housing 100; Impeller housing 110; First installation cavity 111; Water inlet part 112; Support part 113; Water outlet 114; First side wall 1141; Second side wall 1142; Drainage part 115; First drainage section 1151; Second drainage section 1152; Sealing ring 116; Positioning groove 117; First clamping part 118; Water storage cavity 119; Water pump bracket 120; Second installation cavity 121; Protruding part 122; Positioning protrusion 123; Second clamping part 124; Boss 125; Pump cover 130; Fixing part 140; Bending part 141; Buffer part 150; Positioning column 151; Guide hole 152; First card slot 153; Mounting seat 160; Positioning hole 161; Guide post 162; Second card slot 163; Third card slot 164; Card hole 165;

[0047] Impeller 200; Large-diameter blade part 210; Perimeter 211; Inclined surface 2111; Long blade 212; Short blade 213; Small-diameter blade part 220; Rotating shaft 230; Annular plate 240; Water inlet hole 250;

[0048] Motor 300; Output shaft 310;

[0049] Drainage structure 400; Drainage channel 410. Detailed implementation manners

[0050] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein 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 with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0051] In the description of the present utility model, it should be understood that for the orientation descriptions, such as upper and lower, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. This 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.

[0052] In the description of the present utility model, "a plurality of" refers to more than two. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features, and should not be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features or implicitly specifying the sequence relationship of the indicated technical features.

[0053] In the description of the present utility model, unless otherwise clearly defined, terms such as "set", "installed", "connected", etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0054] Referring to Figure 1 and Figure 2 As shown, a drainage pump 1000 of an embodiment of the present utility model is applied to air conditioning equipment such as air conditioners and dehumidifiers. The drainage pump 1000 is used to drain condensed water out of the air conditioning equipment. The drainage pump 1000 of the embodiment of the present utility model includes a housing 100, an impeller 200, a motor 300, and a drainage structure 400. A first installation cavity 111 and a second installation cavity 121 are provided in the housing 100. The housing 100 includes a water inlet portion 112 and a drainage portion 115. The water inlet portion 112 is located at one end of the housing 100 close to the first installation cavity 111, and the inner cavity of the water inlet portion 112 communicates with the first installation cavity 111.

[0055] For example, the air conditioning equipment includes a water receiving tray (not shown in the figure), and a water receiving groove is formed by the depression at the bottom of the water receiving tray; the housing 100 includes a pump cover 130, an impeller housing 110, and a water pump bracket 120. The water pump bracket 120 is connected to the upper end of the impeller housing 110. A first installation cavity 111 is provided in the impeller housing 110, and a second installation cavity 121 is provided in the water pump bracket 120. The pump cover 130 is connected to the upper end of the water pump bracket 120 to close the upper end of the second installation cavity 121, playing a protective role to reduce the entry of water vapor, dust, insects, etc. into the second installation cavity 121. The water inlet portion 112 is located at the lower end of the impeller housing 110. The water inlet portion 112 is a structure protruding from the lower end of the impeller housing 110 and extends into the water receiving groove, which can improve the water inlet efficiency. The drainage portion 115 is a protruding portion 122 of the peripheral wall of the housing 100 and is used to extend out of the side wall of the water receiving tray, so as to drain water out of the water receiving tray.

[0056] Referring to Figure 1As shown, the impeller 200 includes a large-diameter blade portion 210 and a small-diameter blade portion 220. The large-diameter blade portion 210 and the small-diameter blade portion 220 are connected along the rotation axis direction of the impeller 200. For example, the small-diameter blade portion 220 is connected to the lower end of the large-diameter blade portion 210. The large-diameter blade portion 210 is located in the first installation cavity 111, and the small-diameter blade portion 220 is located in the inner cavity of the water inlet portion 112. It should be noted that the "large" and "small" in the large-diameter blade portion 210 and the small-diameter blade portion 220 refer to the fact that the maximum outer diameter of the large-diameter blade portion 210 is larger than the maximum outer diameter of the small-diameter blade portion 220. The motor 300 is installed in the second installation cavity 121, and the motor 300 is configured to drive the impeller 200 to rotate. For example, the output shaft 310 of the motor 300 and the impeller 200 are fixedly connected, so that a negative pressure is generated in the first installation cavity 111, thereby sucking water flow into the first installation cavity 111 through the water inlet portion 112.

[0057] Referring to Figure 1 As shown, the drainage structure 400 is connected to the housing 100. For example, the drainage structure 400 is formed in the water pump bracket 120. A vertically arranged drainage channel 410 is provided inside the drainage structure 400, and the drainage channel 410 is spaced from the second installation cavity 121. It should be noted that the vertically arranged should be interpreted as the outlet of the drainage channel 410 being higher than the inlet, and the drainage channel 410 generally extends along a direction parallel to the rotation axis; however, due to the structural layout and manufacturing requirements of the drainage pump 1000, the drainage channel can also be arranged to extend offset and upward relative to the rotation axis. For example, the drainage channel 410 can extend vertically upward (i.e., parallel to the rotation axis), obliquely upward (including being inclined in the circumferential direction of the rotation axis, or being inclined in the direction perpendicular to the rotation axis (radial direction)), or being inclined in both of the above two directions), or extending in an arc upward, etc. Among them, the peripheral wall of the first installation cavity 111 is provided with a water outlet 114, and the bottom wall of the water outlet 114 is higher than the bottom wall of the large-diameter blade portion 210. One end of the drainage channel 410 communicates with the first installation cavity 111 through the water outlet 114, and the other end communicates with the inner cavity of the drainage portion 115. Therefore, under the action of the impeller 200, the drainage channel 410 is used to guide the water flow from the water inlet portion 112 to the drainage portion 115.

[0058] When the motor 300 drives the impeller 200 to rotate, a negative pressure is generated in the first installation cavity 111, thereby sucking water from the water inlet part 112 into the first installation cavity 111. Then the water flow enters the water inlet channel through the water outlet 114 and finally is discharged from the drainage pump 1000 through the drainage part 115. Since the drainage channel 410 is arranged in the vertical direction, the water directly flows upward when the drainage pump 1000 drains water, and the distance that the water flow travels when discharging from the drainage pump 1000 is shorter. Therefore, the frictional loss can be reduced, enabling the drainage pump 1000 to obtain a higher lift and improving the performance of the drainage pump 1000. It should be noted that the lift refers to the height that the drainage pump 1000 can lift the water.

[0059] Refer to Figure 3 as shown, Figure 3 the dotted arrows in represent the water flow direction. In the embodiment of the present invention, the minimum distance between the outer peripheral wall of the large-diameter blade part 210 and the peripheral wall of the first installation cavity 111 is a, satisfying: 1 mm ≤ a ≤ 3 mm. For example, the value of a can be 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, etc. When a is less than 1 mm, the distance between the large-diameter blade part 210 and the peripheral wall of the first installation cavity 111 is relatively close, and there may be situations such as jitter and yaw during the rotation of the impeller 200. Therefore, it is easy to cause wear and noise between the large-diameter blade part 210 and the peripheral wall of the first installation cavity 111, reducing the service life of the impeller 200. When a is greater than 3 mm, the outer diameter of the large-diameter blade part 210 is smaller, which easily leads to a decrease in the water absorption capacity of the drainage pump 1000. Therefore, restricting the value of a between 1 mm and 3 mm can ensure that the drainage pump 1000 has an appropriate water absorption capacity while effectively avoiding the wear caused by the contact between the large-diameter blade part 210 and the inner wall of the first installation cavity 111.

[0060] Continue to refer to Figure 3 as shown, in the embodiment of the present invention, the minimum height of the water outlet 114 in the direction of the rotation axis is b, satisfying: 5 mm ≤ b ≤ 10 mm. For example, the value of b can be 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, etc. It should be noted that the minimum height of the water outlet 114 in the direction of the rotation axis refers to the height after being blocked. For example Figure 3The water pump bracket 120 in it is provided with a boss 125, and the boss 125 blocks a part of the water outlet 114. The minimum height of the water outlet 114 refers to the height of the slot on the impeller housing 110 minus the height blocked by the boss 125. When b is less than 5 mm, the water outlet area of the water outlet 114 is too small, and the drainage is not smooth, which easily leads to waterway blockage. When b is greater than 10 mm, it is necessary to additionally increase the height of the impeller housing 110, resulting in an increase in the overall size of the drainage pump 1000; if the circumferential length of the water outlet 114 is increased, it is easy to cause an increase in the distance traveled by the water flow and an increase in the frictional loss along the way. Therefore, by reasonably designing the size of b between 5 mm and 10 mm, the drainage of the drainage pump 1000 is relatively smooth, which is beneficial to the miniaturization of the drainage pump 1000 and shortens the distance traveled by the water flow.

[0061] It should be noted that according to Figure 3 the arrow in it, under the action of the impeller 200, a centrifugal force will be generated, which throws the water to the surroundings, making the water flow from the high-pressure side to the low-pressure side. The low-pressure side is the position where the water outlet 114 is located. At the water outlet 114, a part of the water flow enters the drainage channel 410 through the water outlet 114, and the other part of the water will overflow to the water storage cavity 119 between the bottom wall of the large-diameter blade part 210 and the bottom wall of the first installation cavity 111. The water flow will flow downward to the water storage cavity 119 only at the water outlet 114. The water in the water storage cavity 119 will give an upward thrust to the impeller 200, while the water flowing in the impeller 200 in the direction of the water outlet 114 will give a downward pressure to the impeller 200. When the pressure and the thrust are unbalanced, it will cause the impeller 200 to tilt, which is not conducive to the rotation of the impeller 200, increases the frictional loss, and is easy to generate noise.

[0062] To balance the magnitudes of the pressure and the thrust, referring to Figure 4 and Figure 5 as shown, in the embodiment of the present utility model, the maximum outer diameter of the impeller 200 is D1, and the maximum inner diameter of the first installation cavity 111 is D2, satisfying: . For example, the values of the above formula can be 3, 3.5, 4, 4.5, 5, etc. It should be noted that the above formula is equivalent to . Among them, along the circumferential direction of the rotation axis, the arc length of the inlet of the water outlet 114 is L, and the flow-through area of the inlet of the water outlet 114 is b * L. represents the minimum flow-through area between the impeller 200 and the first installation cavity 111, represents the proportion of the overflow area of the part facing the inlet of the water outlet 114: the product of the two represents the overflow area of the part facing the inlet of the water outlet 114. The ratio of the flow-through area of the inlet of the water outlet 114 to the overflow area of the part facing the inlet of the water outlet 114 is between 3:1 and 5:1. After simplifying the formula, we get By reasonably designing the ratio of the flow-through area of the inlet of the water outlet 114 to the overflow area of the corresponding part at the water outlet 114 to be between 3:1 and 5:1, the impeller 200 can achieve balance under the interaction of thrust and pressure, reducing the wear of the impeller 200, lowering the drainage noise, increasing the drainage head, and extending the service life of the impeller 200.

[0063] Referring to Figure 1 and Figure 10 As shown, in the embodiment of the present utility model, the drainage structure 400 is arranged inside the second installation cavity 121, and the drainage channel 410 is arranged parallel to the rotation axis. It can be understood that arranging the drainage structure 400 inside the second installation cavity 121 can reduce the outer diameter size of the drainage pump 1000, which is beneficial to the miniaturized design of the drainage pump 1000. When the drainage channel 410 is parallel to the rotation axis, the distance traveled by the water flow is shorter, reducing the frictional loss along the way, enabling the drainage pump 1000 to obtain a higher head and improving the performance of the drainage pump 1000.

[0064] Referring to Figure 3 and Figure 6 As shown, in the embodiment of the present utility model, the large-diameter blade part 210 includes a surrounding edge 211 arranged around the rotation axis. The top wall of the surrounding edge 211 is an inclined surface 2111, and the inclined surface 2111 is inclined downward in the direction close to the rotation axis. It can be understood that the inclined surface 2111 is beneficial for guiding the water flow towards the drainage channel 410, reducing the discharge resistance of the water flow, and thus improving the drainage efficiency.

[0065] Referring to Figure 6 and Figure 7 As shown, in the embodiment of the present utility model, the large-diameter blade part 210 further includes an annular plate 240, a rotating shaft 230, long blades 212, and short blades 213. The "long" and "short" in the long blades 212 and short blades 213 refer to: along the radial direction of the impeller 200, the maximum length of the long blades 212 is greater than the maximum length of the short blades 213. The edge of the annular plate 240 is connected with an upwardly extending surrounding edge 211. The middle part of the annular plate 240 is provided with a water inlet hole 250. The rotating shaft 230 passes through the water inlet hole 250, and the lower end of the rotating shaft 230 is connected with a small-diameter blade part 220. When the impeller 200 rotates, the small-diameter blade part 220 plays a guiding role, sucking water from the water receiving tray into the water inlet part 112, then entering the inside of the impeller 200 through the water inlet hole 250, and finally being thrown out to the side wall of the first installation cavity 111. The long blades 212 and short blades 213 are radially and alternately distributed. The long blades 212 are connected to the rotating shaft 230 and the annular plate 240, thus determining the relative position between the rotating shaft 230 and the annular plate 240. The short blades 213 are arranged at intervals with the rotating shaft 230 to reduce the blockage of the water inlet hole 250 and improve the water inlet efficiency.

[0066] Continuing to refer toFigure 6 As shown, in the embodiment of the present utility model, the bottom wall of the large-diameter blade portion 210 is an annular plate 240. The annular plate 240 is circular and has a non-porous structure. The non-porous structure means that there are no through holes on the surface of the annular plate 240, and the water inlet hole 250 belongs to the hole formed by the enclosure of the annular plate 240. It can be understood that when there are other through holes in the annular plate 240, the water inside the impeller 200 may enter the water storage cavity 119 through the through holes, resulting in a decrease in the water absorption efficiency of the impeller 200, disturbing the balance of the impeller 200 under thrust and pressure, possibly causing cavitation problems and increasing noise. Therefore, when the annular plate 240 has a non-porous structure, it can improve the water absorption efficiency of the impeller 200, ensure the stability of the impeller 200 during rotation, improve the cavitation problem, and reduce noise.

[0067] Referring to Figure 4 and Figure 5 As shown, in the embodiment of the present utility model, the water outlet 114 extends directly upward in the height direction and is connected to the drainage channel 410 to shorten the path of the water flow and reduce the frictional loss along the way. In the projection plane perpendicular to the rotation axis, the distance between the projections of the two side walls of the water outlet 114 opposite to each other in the circumferential direction of the rotation axis gradually increases from the inside to the outside. For example, the two side walls of the water outlet 114 opposite to each other in the circumferential direction of the rotation axis are respectively the first side wall 1141 and the second side wall 1142, and the distance between the first side wall 1141 and the second side wall 1142 gradually increases in the direction away from the rotation axis. Therefore, it is possible to reduce the eddy current resistance of the water flow at the water outlet 114, so as to reduce the local resistance of the water flow at the water outlet 114, enable the water flow to pass smoothly, and improve the drainage efficiency.

[0068] Referring to Figure 3 As shown, in the embodiment of the present utility model, the bottom wall of the water outlet 114 is arc-shaped, and / or the top wall of the drainage channel 410 is arc-shaped, and the plane where the inlet of the drainage channel 410 is located is perpendicular to the plane where the outlet of the drainage channel 410 is located. For example, the bottom wall of the water outlet 114 and the top wall of the drainage channel 410 are both arc-shaped; or the bottom wall of the water outlet 114 is arc-shaped and the top wall of the drainage channel 410 is planar; or the bottom wall of the water outlet 114 is planar and the top wall of the drainage channel 410 is arc-shaped. Taking the example where the bottom wall of the water outlet 114 and the top wall of the drainage channel 410 are both arc-shaped, adopting this solution can reduce the movement resistance of the water flow, reduce the situation where the direction of the water flow suddenly changes during movement, so as to reduce the energy loss, improve the stability of the water flow during movement, and increase the head of the drainage pump 1000.

[0069] For example, the drainage pump 1000 is connected to the drainage pipe, and the drainage pipe needs to be inclined to connect multiple indoor units of the multi-split air conditioner. When the position of the water outlet 114 of the drainage pump 1000 is relatively high, the required height of the drainage pipe increases, resulting in the need to thicken the ceiling during the installation of the multi-split air conditioner. Therefore, by setting the plane where the inlet of the drainage channel 410 is located and the plane where the outlet of the drainage channel 410 is located to be perpendicular to each other, the position of the outlet of the drainage channel 410 can be reduced, so as to reduce the required height of the drainage pipe and the thickness of the ceiling.

[0070] Referring to Figure 1 As shown, in the embodiment of the present invention, the drainage part 115 is located on the side wall of the housing 100. The inner cavity of the drainage part 115 includes a first drainage section 1151 provided at the outlet of the drainage channel 410, and the cross-sectional area of the first drainage section 1151 gradually increases along the drainage direction. It can be understood that since the plane where the inlet of the drainage channel 410 is located and the plane where the outlet of the drainage channel 410 is located are perpendicular to each other, phenomena such as eddy current and turbulence may occur during the turning of the water flow, increasing the energy loss of the water flow. By designing the cross-sectional area of the first drainage section 1151 to gradually increase along the drainage direction, phenomena such as eddy current and turbulence can be reduced, the drainage resistance can be lowered, and the energy loss of the water flow can be reduced.

[0071] Continuing to refer to Figure 1 As shown, in the embodiment of the present invention, the inner cavity of the drainage part 115 further includes a second drainage section 1152. The second drainage section 1152 is far from the end of the first drainage channel 410 away from the drainage channel 410, and the minimum cross-sectional area of the second drainage section 1152 is larger than the maximum cross-sectional area of the first drainage section 1151. It should be noted that the drainage part 115 can be manufactured by injection molding. By setting the minimum cross-sectional area of the second drainage section 1152 to be larger than the maximum cross-sectional area of the first drainage section 1151, it is convenient for the drainage part 115 to be demolded, so as to ensure product quality and improve production efficiency.

[0072] Referring to Figure 2 and Figure 3As shown, in an embodiment of the utility model, the impeller housing 110 includes a water inlet portion 112 and a support portion 113. The water inlet portion 112 is located at the lower end of the impeller housing 110, and the support portion 113 is located at one end of the impeller housing 110 away from the water inlet portion 112. The support portion 113 is formed with a first installation cavity 111, and a water outlet 114 is provided at the support portion 113. A positioning groove 117 arranged circumferentially along the axis of rotation is provided in the impeller housing 110. The water pump bracket 120 includes a protrusion 122, which is a hollow structure and protrudes toward the impeller housing 110, and a partial structure of the second installation cavity 121 is formed in the protrusion 122. The drainage structure 400 is fixedly connected to the protrusion 122 and one end is attached to the end surface of the support portion 113. The protrusion 122 and the drainage structure 400 can be an integral structure to improve the stability of the connection and facilitate assembly. For example Figure 10 As shown, the drainage structure 400 is formed on the inner side of the protrusion 122. Alternatively, the drainage structure 400 may be formed on a part of the side wall of the protrusion 122. The protrusion 122 and the drainage structure 400 may also be separate structures, for example, the drainage structure 400 is fixed to the protrusion 122 by bonding, clamping, or fastener connection. Among them, the protrusion 122 and the drainage structure 400 are jointly formed with a positioning protrusion 123 that cooperates with the positioning groove 117, and a sealing ring 116 is provided between the positioning groove 117 and the positioning protrusion 123 to prevent the water in the first installation cavity 111 from seeping out of the housing 100 through the gap between the impeller housing 110 and the water pump bracket 120, thereby improving the sealing effect.

[0073] It should be noted that, in other embodiments, the drainage structure 400 may also be connected to the impeller housing 110, for example, the drainage structure 400 extends upward in a direction away from the impeller housing 110; the drainage structure 400 extends in a horizontal direction, etc., and a suitable solution is selected according to actual conditions.

[0074] In the embodiment of the utility model, a sealing structure (not shown in the figure) is provided at the connection between the drainage structure 400 and the support portion 113. The sealing structure is arranged around the inlet of the drainage channel 410 to reduce water leakage and water seepage at the inlet of the drainage channel 410. It should be noted that there may be no sealing structure at the connection between the drainage structure 400 and the support portion 113. Even if water leakage or water seepage occurs, the amount of water leakage is small, and the leaked water will flow back into the first installation cavity 111 and will not penetrate outside the housing 100. Therefore, the drainage performance of the drainage pump 1000 is less affected. Reducing the use of sealing structures can reduce production costs, reduce assembly steps, and improve production efficiency.

[0075] Reference Figure 2As shown in the figure, in the embodiment of the present utility model, a plurality of first clamping portions 118 are arranged at intervals on the outer side of the impeller housing 110, for example, three are arranged. A plurality of second clamping portions 124 are arranged at intervals on the outer side of the water pump bracket 120. Each of the first clamping portions 118 and each of the second clamping portions 124 are clamped in one-to-one correspondence, which can improve the assembly efficiency and the connection is stable and reliable.

[0076] An air conditioner according to an embodiment of the present utility model can be a multi-connected air conditioner, a split air conditioner, a mobile air conditioner or a central air conditioner, etc. The air conditioner includes the drainage pump 1000 of the above embodiment. By arranging a first installation cavity 111 and a second installation cavity 121 inside the housing 100 of the drainage pump 1000, the water inlet portion 112 of the housing 100 is connected to one end of the first installation cavity 111, and the inner cavity of the water inlet portion 112 communicates with the first installation cavity 111. The impeller 200 is installed in the first installation cavity 111, and the motor 300 is installed in the second installation cavity 121 and is used to drive the impeller 200 to rotate. The drainage channel 410 of the drainage structure 400 is arranged in the vertical direction, and both ends of the drainage channel 410 communicate with the drainage portion 115 and the water outlet 114 located on the peripheral wall of the first installation cavity 111 respectively. When the motor 300 drives the impeller 200 to rotate, a negative pressure is generated in the first installation cavity 111, so that water is sucked from the water inlet portion 112 into the first installation cavity 111. Then the water flow enters the water inlet channel through the water outlet 114, and finally is discharged from the drainage pump 1000 through the drainage portion 115. Since the drainage channel 410 is arranged in the vertical direction, the water directly flows upward when the drainage pump 1000 drains water, and the distance that the water flow travels when discharging from the drainage pump 1000 is shorter. Therefore, the along-way loss can be reduced, so that the drainage pump 1000 obtains a higher lift and the performance of the drainage pump 1000 is improved.

[0077] Since the air conditioner of the embodiment of the present utility model adopts all the technical solutions of the drainage pump 1000 of the above embodiment, it at least has all the beneficial effects brought by the technical solutions of the above embodiment, which will not be elaborated here.

[0078] Refer to Figure 8As shown, in the embodiment of the utility model, the air conditioner further includes a box body (not shown in the figure), the drain pump 1000 further includes a fixing member 140 and a buffer member 150, and the housing 100 further includes a mounting seat 160, and the mounting seat 160 is fixedly connected to the side wall of the water pump bracket 120. The buffer member 150 is arranged between the mounting seat 160 and the box body, and the fixing member 140 is arranged on the side of the mounting seat 160 away from the buffer member 150, and the box body, the buffer member 150, the mounting seat 160 and the fixing member 140 are fixedly connected by fasteners. The fastener can be a bolt, a screw, a pin, a pin and the like. For example, when the fastener is a bolt, the bolt is passed through the box body, the buffer member 150, the mounting seat 160 and the fixing member 140, and then connected and fixed by nuts and bolts. The buffer 150 is elastic, for example, the buffer 150 is made of materials such as silicone or rubber. Since the drainage pump 1000 will inevitably vibrate during operation, the buffer 150 is arranged between the mounting seat 160 and the box body to absorb vibration and reduce the vibration of the drainage pump 1000 transmitted to the box body to increase noise. The fixing member 140 is equivalent to a gasket, which is used to increase the stability of the fastener connection and effectively reduce the loosening and falling of the fastener.

[0079] Reference Figure 8 and Figure 9 As shown, in the embodiment of the utility model, the buffer 150 is provided with a positioning column 151, and the mounting seat 160 is provided with a positioning hole 161 that cooperates with the positioning column 151. The mounting seat 160 is provided with a guide column 162, and the buffer 150 is provided with a guide hole 152 that cooperates with the guide column 162, so that the relative position between the buffer 150 and the mounting seat 160 can be quickly determined, thereby improving the assembly efficiency. The bottom of the buffer 150 is provided with a first card slot 153, and the bottom of the mounting seat 160 is plate-shaped and can be inserted into the first card slot 153, so as to improve the stability of the connection between the buffer 150 and the mounting seat 160 and reduce the situation of loosening and falling off. The fixing member 140 is sheet-shaped, and the mounting seat 160 is provided with a second card slot 163 and a third card slot 164, and the middle part of the fixing member 140 is inserted into the second card slot 163, and the bottom of the fixing member 140 is inserted into the third card slot 164, so as to improve the stability and reliability of the connection between the fixing member 140 and the mounting seat 160. The fixing member 140 is provided with bending portions 141 capable of bending and deforming on both sides, and the mounting seat 160 is provided with a clamping hole 165 for the bending portion 141 to be clamped and fixed. During installation, the bending portion 141 is bent into the clamping hole 165 by external force, thereby further fixing the positions of the mounting seat 160 and the fixing member 140, and effectively reducing the risk of the fixing member 140 loosening and falling off.

[0080] 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. Drainage pump, characterized in that, include: A shell, wherein a first installation cavity and a second installation cavity are provided inside the shell, the shell comprises a water inlet portion and a water discharge portion, the water inlet portion is located at one end of the shell close to the first installation cavity, and the inner cavity of the water inlet portion is communicated with the first installation cavity; An impeller, comprising a large-diameter blade portion and a small-diameter blade portion connected along the rotation axis of the impeller, the large-diameter blade portion is located in the first mounting cavity, and the small-diameter blade portion is located in the inner cavity of the water inlet portion; a motor, installed in the second installation cavity, wherein the motor is configured to drive the impeller to rotate; a drainage structure connected to the housing and provided with a vertically arranged drainage channel therein, wherein the drainage channel is spaced apart from the second mounting cavity; Wherein, a water outlet is arranged on the peripheral wall of the first installation cavity, one end of the drainage channel is connected to the first installation cavity through the water outlet, and the other end is connected to the inner cavity of the drainage part.

2. The drainage pump according to claim 1, characterized in that: The minimum distance between the outer peripheral wall of the large-diameter blade portion and the peripheral wall of the first mounting cavity is a, which satisfies: 1mm≤a≤3mm; and / or, The minimum height of the water outlet along the direction of the rotation axis is b, which satisfies: 5mm≤b≤10mm.

3. The drainage pump according to claim 1 or 2, characterized in that: The minimum height of the water outlet along the direction of the rotation axis is b, the maximum outer diameter of the impeller is D1, and the maximum inner diameter of the first installation cavity is D2, satisfying: .

4. The drainage pump according to claim 1, characterized in that: The drainage structure is arranged at the inner side of the second installation cavity, and the drainage channel is arranged parallel to the rotation axis.

5. The drainage pump according to claim 1, characterized in that: The large-diameter blade portion includes a peripheral edge arranged around the rotation axis, and a top wall of the peripheral edge is arranged to be inclined downward in a direction close to the rotation axis.

6. The drainage pump according to claim 1, characterized in that: The bottom wall of the large-diameter blade portion is configured in an annular shape and has a non-porous structure.

7. The drainage pump according to claim 1, characterized in that: In a projection plane perpendicular to the rotation axis, the distance between projections of two side walls of the water outlet that are opposite to each other along the circumference of the rotation axis gradually increases from inside to outside.

8. The drainage pump according to claim 1, characterized in that: The bottom wall of the water outlet is arc-shaped; and / or, The top wall of the drainage channel is in an arc shape, and the plane where the inlet of the drainage channel is located is perpendicular to the plane where the outlet of the drainage channel is located.

9. The drainage pump according to claim 1, characterized in that: The drainage portion is located on the side wall of the shell, and the inner cavity of the drainage portion includes a first drainage section arranged at the outlet of the drainage channel, and the cross-sectional area of the first drainage section gradually increases along the drainage direction.

10. The drainage pump according to claim 9, characterized in that: The inner cavity of the drainage portion further includes a second drainage segment connected to an end of the first drainage segment away from the drainage channel, and the cross-sectional area of the second drainage segment is greater than the maximum cross-sectional area of the first drainage segment.

11. The drainage pump according to claim 1, characterized in that, The housing comprises: An impeller housing, comprising the water inlet and a support portion at one end away from the water inlet, the water outlet being arranged at the support portion, and a positioning groove arranged along the circumference of the rotation axis being arranged in the impeller housing; The water pump bracket includes a protrusion protruding toward the impeller housing, and the drainage structure is fixedly connected to the protrusion and fits the end surface of the support portion; the protrusion and the drainage structure together form a positioning protrusion that cooperates with the positioning groove, and a sealing ring is provided between the positioning groove and the positioning protrusion.

12. The drainage pump according to claim 11, wherein: A sealing structure is provided at the connection between the drainage structure and the support portion.

13. The drainage pump according to claim 11, characterized in that: A boss is provided at the end of the protruding portion, and the boss is clamped on the inner wall of the first mounting cavity.

14. Air conditioner, characterized in that: A drainage pump comprising the drainage pump according to any one of claims 1 to 13.

15. The air conditioner according to claim 14, characterized in that: The air conditioner also includes a casing, the drain pump also includes a fixing part and a buffer part, the casing includes a mounting seat, the buffer part is arranged between the mounting seat and the casing, the fixing part is arranged on a side of the mounting seat away from the buffer part, and the casing, the buffer part, the mounting seat and the fixing part are connected and fixed by fasteners.

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