Drainage pump, drainage system and air conditioner

Abstract

A drainage pump, a drainage system and an air conditioner, relating to the technical field of electrical devices. The drainage pump is mounted inside a housing (700) of an air conditioner, and comprises a pump housing (100), an impeller (150), a drainage portion (200) and a mounting portion (300). The pump housing (100) has a first mounting cavity (140), a water inlet (132) is formed at the bottom of the pump housing (100), and the water inlet (132) is in communication with the first mounting cavity (140); the impeller (150) is rotatably arranged in the first mounting cavity (140); the mounting portion (300) is arranged on the peripheral wall of the pump housing (100), and the mounting portion (300) is connected to the housing (700); and the drainage portion (200) is arranged on the peripheral wall of the pump housing (100), the drainage portion (200) is provided with a drainage channel (230), the drainage channel (230) is in communication with the first mounting cavity (140), and the drainage portion (200) is located on the side of the pump housing (100) facing the housing (700).

Description

Drain pumps, drainage systems and air conditioners Technical Field

[0001] This application claims priority to Chinese patent applications with application number 202311438179.4 filed on October 31, 2023, entitled “Drainage pump and air conditioner”, application number 202322945059.5 filed on October 31, 2023, entitled “Drainage pump and air conditioner”, application number 202410541921.2 filed on April 30, 2024, entitled “Drainage pump, drainage system and air conditioner”, and application number 202420945488.4 filed on April 30, 2024, entitled “Drainage pump, drainage system and air conditioner”. The entire contents of the above patent applications are incorporated into this application by reference.

[0002] Technical Field

[0003] The present application relates to the technical field of electrical equipment, and in particular to a drainage pump and an air conditioner. Background Art

[0004] The drain pump is a crucial component of the air conditioner's indoor unit, draining condensed water from the unit to the outside through the drain pipe. For easy maintenance, the drain pump is usually mounted on the indoor unit's casing or on the drain pan.

[0005] Existing drain pump mounting structures are typically located on top of the drain pump. Installation requires a bracket connected to the mounting structure on the side panel of the indoor unit's casing, making the installation complex. Furthermore, to avoid interference between the drain pump's drainage structure and the indoor unit's water pan within the limited height space, the drainage structure's outlet must be installed facing away from the side panel of the casing. Consequently, a long hose must be connected between the drainage structure's outlet and the connector on the casing's side panel, occupying a large installation space and hindering the layout of other piping within the indoor unit. Furthermore, existing drain pumps require numerous mounting parts, resulting in low installation efficiency and high costs.

[0006] Furthermore, due to the limited space inside the air conditioner's indoor unit, the drain pump is relatively short. The drain pump's outlet is located at the bottom of the pump casing, placing it below the sidewall of the water tray. This requires a connecting structure, such as a rubber hose, to connect to the outlet to divert water out of the water tray. This external rubber hose solution increases the space occupied by the drain pump, hindering the routing of piping and wiring within the air conditioner.

[0007] Summary of the Invention

[0008] The present application aims to at least partially solve one of the technical problems existing in the prior art. To this end, the present application proposes a drainage pump, a drainage system and an air conditioner.

[0009] According to the first embodiment of the present application, the drainage pump is installed inside the casing of the air conditioner, and the drainage pump includes:

[0010] A pump housing is provided with a first installation cavity, and a water inlet is provided at the bottom of the pump housing, and the water inlet is communicated with the first installation cavity;

[0011] an impeller rotatably disposed in the first mounting cavity;

[0012] A mounting portion is provided on a peripheral wall of the pump housing, and the mounting portion is connected to the housing;

[0013] The drainage portion is provided on the peripheral wall of the pump housing. The drainage portion is provided with a drainage channel. The drainage channel is communicated with the first installation cavity. The drainage portion is located on a side of the pump housing facing the casing.

[0014] According to some embodiments of the present application, the drainage portion includes a first drainage section, which is connected to the peripheral wall of the pump casing and extends in a direction away from the pump casing, and the first drainage section is located on the side of the mounting portion facing the water inlet.

[0015] According to some embodiments of the present application, a water outlet is provided on the peripheral wall of the pump casing, and the water outlet is located on the side of the mounting portion facing the water inlet and is connected to the first mounting cavity and the drainage channel. Along the axial direction of the impeller, the maximum distance from the center line of the water inlet to the water outlet is H1, satisfying: H1 ≥ 30 mm.

[0016] According to some embodiments of the present application, the drainage portion further includes a second drainage segment, which is connected to an end of the first drainage segment away from the pump casing, and the second drainage segment extends in a direction away from the water inlet.

[0017] According to some embodiments of the present application, the first drainage segment is perpendicular to the rotation axis of the impeller, and the second drainage segment is perpendicular to the first drainage segment.

[0018] According to some embodiments of the present application, a water outlet is provided on the peripheral wall of the pump casing, and the water outlet is located on the side of the mounting portion facing the water inlet and is connected to the first mounting cavity and the drainage channel. Along the axial direction of the impeller, the maximum distance from the center line of the water inlet to the water outlet is H2, satisfying: H2<30mm.

[0019] According to some embodiments of the present application, the mounting portion is extended in a direction away from the pump casing, and in a projection plane perpendicular to the axial direction of the impeller, the angle between the mounting portion and the center line corresponding to the projection of the first drainage section is θ, satisfying: 0<θ≤45°.

[0020] According to some embodiments of the present application, the mounting portion includes a flange portion, and the flange portion is located at an end of the mounting portion facing away from the pump casing.

[0021] According to some embodiments of the present application, the flange portion includes a connecting portion, and the connecting portion is used to fix the flange portion.

[0022] According to some embodiments of the present application, the flange portion includes a positioning portion, and the positioning portion is used to locate the installation position of the flange portion.

[0023] According to some embodiments of the present application, the drainage pump further includes a pipe joint, which is connected to the drainage portion and is used to dock with a drainage pipe.

[0024] According to some embodiments of the present application, the drainage pump further includes a control unit and a driving unit, the driving unit is connected to the impeller and is used to drive the impeller to rotate, and the control unit is electrically connected to the driving unit.

[0025] The air conditioner according to the second embodiment of the present application includes: a casing and the drainage pump according to the first embodiment, wherein the mounting portion is mounted on the casing.

[0026] According to the third aspect of the present application, the drainage pump includes: a pump casing, which is provided with a water inlet, a first installation cavity and a first water channel, the water inlet is located at one end of the pump body casing, the first installation cavity is located at the other end of the pump body casing, and the first water channel is connected to the first installation cavity; an impeller is installed in the first installation cavity; an upper shell body is connected to the pump body casing, and a second installation cavity and a third installation cavity located near one end of the first installation cavity are provided in the upper shell body, and the outer wall of the upper shell body is provided with a water outlet connected to the third installation cavity; a motor is installed in the second installation cavity, and the motor is configured to drive the impeller to rotate; a lifting mechanism is configured to guide the water flow of the first water channel to the water outlet, the lifting mechanism is installed in the third installation cavity, the lifting mechanism is provided with a second water channel, and the second water channel is connected to the first water channel and the water outlet.

[0027] According to some embodiments of the present application, at least part of the outer wall of the lifting mechanism is in contact with the side wall of the third installation cavity, and the second water channel is a second groove formed on the outer wall of the lifting mechanism, one end of the second groove is connected to the first water channel, and the other end of the second groove is connected to the water outlet.

[0028] According to some embodiments of the present application, the second groove includes a first groove segment and a second groove segment, and the first groove segment and the second groove segment form an angle with each other and are transitionally connected.

[0029] According to some embodiments of the present application, the first trough section is located on a side close to the first water channel, the second trough section is located on a side close to the water outlet, and the width of the outlet of the second trough section is greater than the width of the inlet of the first trough section.

[0030] According to some embodiments of the present application, the second groove includes a plurality of connected groove segments, and the plurality of groove segments are connected by arc transitions.

[0031] According to some embodiments of the present application, a shaft portion is provided in the upper shell body, and the lifting mechanism is sleeve-shaped and sleeved on the shaft portion.

[0032] According to some embodiments of the present application, the outer side wall of the lifting mechanism is provided with a first limiting portion, and the side wall of the third installation cavity is provided with a second limiting portion, and the second limiting portion cooperates with the first limiting portion to limit the relative rotation of the lifting mechanism and the upper shell.

[0033] According to some embodiments of the present application, the first water channel is a first groove formed between the inner wall surface of the first installation cavity and the outer wall surface of the pump body shell, the inner wall surface of the first installation cavity is provided with a communication port, and the first groove is connected to the first installation cavity through the communication port;

[0034] The outlet of the first water channel is located on the end surface of the pump shell close to the lifting mechanism.

[0035] According to some embodiments of the present application, projected along the rotation axis of the impeller, the inner wall surface of the first mounting cavity forms a first contour line, the first contour line is circular, the wall surface of the first groove close to the outside of the pump body shell is a second contour line, and the first contour line is tangent to the second contour line.

[0036] According to some embodiments of the present application, the inner diameter of the water inlet gradually increases along the water suction direction of the drainage pump.

[0037] According to some embodiments of the present application, the impeller includes a water inlet blade located at the water inlet, the water inlet blade includes a tapered portion, and the width of the tapered portion gradually increases along the water suction direction.

[0038] According to some embodiments of the present application, the outer side surface of the conical portion is configured to be inclined toward the rotation axis of the impeller, and the inclination angle is α, satisfying: 0°<α≤60°.

[0039] According to some embodiments of the present application, the minimum distance between the inner wall of the water inlet and the outer side surface of the tapered portion is d, which satisfies: 2mm≤d≤5mm.

[0040] According to some embodiments of the present application, the drain pump includes a drain pipe, which is fixedly connected to the outer wall of the upper shell, and the inner hole of the drain pipe is connected to the water outlet.

[0041] According to some embodiments of the present application, the drainage pump further includes a fixing sleeve for installing the drainage pump, the fixing sleeve is arranged around the outside of the drainage pipe, and a mounting flange is provided at the end of the fixing sleeve.

[0042] According to the fourth embodiment of the present application, the drainage system includes a water receiving tray and the drainage pump described in the above embodiment, and the lowest point of the water outlet of the drainage pump is higher than the side wall of the water receiving tray.

[0043] The air conditioner according to the fifth embodiment of the present application includes the drainage pump and / or drainage system described in the above embodiments.

[0044] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The present application is further described below with reference to the accompanying drawings and embodiments, wherein:

[0046] FIG1 is a schematic structural diagram of a drainage pump according to an embodiment of the present application;

[0047] FIG2 is a top view of the drainage pump in FIG1 ;

[0048] FIG3 is a cross-sectional view of the section AA in FIG2 ;

[0049] FIG4 is a partial schematic diagram of the drainage pump in FIG1 installed in the indoor unit;

[0050] FIG5 is a schematic structural diagram of a drainage pump according to another embodiment of the present application;

[0051] FIG6 is a top view of the drainage pump in FIG5 ;

[0052] FIG7 is a rotational sectional view at BB in FIG6;

[0053] FIG8 is a partial schematic diagram of the drainage pump in FIG5 installed in the indoor unit;

[0054] FIG9 is a schematic structural diagram of a drainage pump according to an embodiment of the present application and a common water pump in related art;

[0055] FIG10 is a schematic structural diagram of a drainage pump according to an embodiment of the present application and a common water pump in related art installed on a mounting plate;

[0056] FIG11 is a cross-sectional view of a drainage pump according to an embodiment of the present application;

[0057] FIG12 is an exploded view of a drainage pump according to an embodiment of the present application;

[0058] FIG13 is a partial structural cross-sectional view of a drainage pump according to an embodiment of the present application;

[0059] FIG14 is a schematic structural diagram of a pump casing according to an embodiment of the present application;

[0060] FIG15 is a top view of a pump housing according to an embodiment of the present application;

[0061] FIG16 is a schematic structural diagram of a lifting mechanism according to an embodiment of the present application;

[0062] FIG17 is a schematic structural diagram of an upper housing according to an embodiment of the present application;

[0063] FIG18 is a side view of an impeller according to an embodiment of the present application;

[0064] FIG19 is a schematic structural diagram of a drainage pump according to another embodiment of the present application;

[0065] FIG20 is a bottom view of a drainage pump according to an embodiment of the present application; and

[0066] FIG21 is a bottom view of a drainage pump according to another embodiment of the present application.

[0067] Reference numerals:

[0068] Drain pump 1000;

[0069] Ordinary water pump 2000; rubber hose 2100;

[0070] Pump housing 100; upper housing 110; intermediate housing 120; partition 121; third mounting cavity 123; water outlet 124; second limiting portion 125; drain pipe 126; shaft 127; lower housing 130; water inlet 131; water inlet 132; water outlet 133; first mounting cavity 140; communication port 141; first contour line 142; inner wall surface 143; first water channel 160; first groove 161; second contour line 162; outer wall surface 170;

[0071] Impeller 150; water inlet blade 151; tapered portion 152;

[0072] Drain portion 200; first drainage section 210; second drainage section 220; drainage channel 230;

[0073] Mounting portion 300; flange portion 310; connecting portion 320; positioning portion 330; fixing sleeve 340; mounting flange 341; adapter 370; connecting pipe 371;

[0074] Pipe joint 400;

[0075] Lifting mechanism 500; second water channel 510; second groove 511; first groove section 512; second groove section 513; first limiting portion 520;

[0076] Drive unit / motor 600; rotor 610; stator 620; rotating shaft 630; control unit 640;

[0077] Chassis 700;

[0078] Water receiving tray 800; water collecting chamber 810;

[0079] Water receiving tray 900; mounting plate 910; through hole 911. DETAILED DESCRIPTION

[0080] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0081] In the description of this application, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0082] In the description of this application, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly specifying the number or order of the technical features indicated.

[0083] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, assembling, and matching should be understood in a broad sense. Technical personnel in the relevant technical field can reasonably determine the specific meaning of the above terms in this application based on the specific content of the technical solution.

[0084] The usage rate of air conditioners is increasing. The drain pump, as an important component of the indoor unit of the air conditioner, plays the role of draining the condensed water of the indoor unit to the outside through the drainage pipe. In order to facilitate maintenance, the drain pump is usually installed on the side panel of the indoor unit's casing. The existing drain pump's fixed structure is generally set on the top of the drain pump. During installation, it is necessary to set a bracket connected to the fixed structure of the drain pump on the side panel of the indoor unit's casing. The installation structure is complicated. In addition, in the limited height space inside the indoor unit, in order to avoid interference between the drainage structure of the drain pump and the side wall of the water receiving pan of the indoor unit, the water outlet of the drainage structure needs to be installed with the back of the side panel of the casing. Therefore, it is necessary to connect a long drain pipe between the water outlet of the drainage structure and the joint at the side panel of the casing, and fix the drain pipe with components such as clamps and bolts. The installation space occupied by the entire drain pump is large, which is not conducive to the layout of other pipelines inside the indoor unit. At the same time, the drainage pump of the prior art requires many installation parts, low installation efficiency and high cost.

[0085] To this end, referring to Figures 1 to 8 , a first embodiment of the present application provides a drainage pump, which is mainly used in the indoor unit of an air conditioner to discharge condensed water generated in the indoor unit to the outside.

[0086] The following describes the structure of the drain pump in detail, taking the example of the drain pump being installed in the casing of the indoor unit.

[0087] As shown in FIG1 , it can be understood that the drainage pump includes a pump housing 100, which is generally a columnar structure. Specifically, the pump housing 100 includes an upper housing 110, an intermediate housing 120, and a lower housing 130. The upper housing 110 is mounted on the upper end of the intermediate housing 120, and the lower housing 130 is mounted on the lower end of the intermediate housing 120. The upper housing 110 and the intermediate housing 120, as well as the lower housing 130 and the intermediate housing 120, can be connected and fixed by snaps, screws, threads, etc.

[0088] 1 and 3 , it can be understood that the lower housing 130 is generally funnel-shaped. A water inlet 131 is provided at the bottom of the lower housing 130. The water inlet 131 is cylindrical and extends downwardly so that water can be drawn into the water receiving pan 800 through the water inlet 131, thereby preventing interference between the drain pump and the water receiving pan 800. The interior of the lower housing 130 is hollow and extends vertically through the lower housing 130. A partition 121 is provided at the bottom of the intermediate housing 120. A first mounting cavity 140 is defined between the partition 121 and the lower housing 130. The first mounting cavity 140 is also generally funnel-shaped. A water inlet 132 is provided at the lower end of the water inlet 131, which communicates with the first mounting cavity 140.

[0089] As shown in FIG3 , it can be understood that an impeller 150 is also mounted within the pump housing 100. Specifically, the impeller 150 is rotatably mounted within the first mounting cavity 140, with the rotation axis of the impeller 150 arranged in the vertical direction. The impeller 150 is driven to rotate by a drive unit 600, which is mounted on the upper housing 110. Specifically, the drive unit 600 is configured as a motor, that is, the drive unit 600 includes a rotor 610 and a stator 620 arranged around the rotor 610. The stator 620 is fixedly mounted on the upper housing 110. The rotor 610 has a rotating shaft 630, which extends through the intermediate housing 120 and passes through a through hole provided in the partition 121. The lower end of the rotating shaft 630 extends into the first mounting cavity 140 and is fixedly connected to the impeller 150. Thus, the impeller 150 can be driven to rotate by the drive unit 600, thereby achieving water inlet at the water inlet 132.

[0090] As shown in Figures 1 and 3, it can be understood that the drainage pump is further provided with a drainage portion 200. The drainage portion 200 is disposed on the peripheral wall of the pump housing 100. Specifically, the drainage portion 200 is a generally cylindrical structure and is connected to the outer peripheral wall of the lower housing 130. The drainage portion 200 and the lower housing 130 can be integrally formed to facilitate production. The drainage portion 200 can also be connected to the lower housing 130 by means of a threaded connection, a snap-on connection, or the like. The drainage portion 200 is provided with a drainage channel 230 that extends along the length of the drainage portion 200 and communicates with the first mounting cavity 140. Specifically, the peripheral wall of the lower housing 130 is provided with a water outlet 133 located radially to one side of the impeller 150. The water outlet 133 communicates with the first mounting cavity 140, and the drainage portion 200 is disposed at the water outlet 133 so that the drainage channel 230 is connected to the water outlet 133. Therefore, when the driving unit 600 drives the impeller 150 to rotate, water can be taken in at the water inlet 132, enter the first installation cavity 140 and be discharged from the drainage channel 230, thereby draining the condensed water in the water receiving tray 800.

[0091] 1 and 4 , it can be understood that the drain portion 200 is connected to a pipe joint 400 to enable the drain portion 200 to connect with the drain pipe outside the indoor unit. Typically, the pipe joint 400 is mounted on a side panel of the housing 700 to facilitate positioning of the pipe joint 400. The pipe joint 400 can be connected to the drain portion 200 by bonding, clamping, threading, or the like.

[0092] 1 and 3 , it can be understood that the drain pump is further provided with a mounting portion 300, which is used to securely mount the drain pump on the side panel of the casing 700. Specifically, the mounting portion 300 is provided on the outer peripheral wall of the intermediate casing 120, that is, the mounting portion 300 is located on the upper side of the water outlet 133. The mounting portion 300 is extended toward the outside of the intermediate casing 120, and the extension direction of the mounting portion 300 may be perpendicular to the rotation axis of the impeller 150, or the angle between the extension direction of the mounting portion 300 and the rotation axis of the impeller 150 is less than 90°. The cross-section of the mounting portion 300 may be rectangular, circular, etc., and the mounting portion 300 and the intermediate casing 120 may be an integrally formed structure for ease of production, or the mounting portion 300 may be connected to the intermediate casing 120 as a whole by threaded connection, screw fixation, snap connection, etc.

[0093] As shown in Figures 1 and 2, it can be understood that when the drain pump is fixedly mounted to the side panel of the housing 700 via the mounting portion 300, the drain portion 200 is located on the side of the pump housing 100 facing the side panel of the housing 700. In other words, the mounting portion 300 and the drain portion 200 are located on the same side of a reference plane, which is a plane passing through the rotation axis of the impeller 150 and parallel to the side panel of the housing 700. In the axial projection plane of the impeller 150, the projections of the mounting portion 300 and the drain portion 200 on the impeller 150 may completely overlap, partially overlap, or not overlap at all. Because the mounting portion 300 is located on the peripheral wall of the pump housing 100 rather than the top, the overall height of the drain pump is reduced, thereby reducing the installation space occupied by the drain pump. The drain pump's installation position can also be moved upward, allowing the drain portion 200 to clear the side wall of the water receiving tray 800, thereby preventing interference between the drain portion 200 and the water receiving tray 800.

[0094] When installing the drain pump, the drain pump is located above the water receiving pan 800, with the water inlet 131 close to the side wall of the water receiving pan 800. Since the mounting portion 300 is located on the circumference of the pump housing 100, the mounting portion 300 can be directly fixed to the side panel of the indoor unit's casing 700 without the need for additional components such as brackets. The drain portion 200 is oriented toward the side panel of the casing 700, allowing the pipe joint 400 connected to the drain portion 200 to be directly clipped into the opening in the side panel of the casing 700. This eliminates the need for additional components such as a hose or a clamp for securing the hose between the pipe joint 400 and the drain portion 200. This reduces the number of components required for installation and the overall installation space occupied by the drain pump, facilitating the layout of other piping within the indoor unit. The drain pump has a simple installation structure, which improves installation efficiency and reduces costs.

[0095] As shown in Figures 1 to 4 , it can be understood that the drain portion 200 includes only the first drain section 210, with the pipe joint 400 directly connected to the end of the first drain section 210 facing away from the pump housing 100. The first drain section 210 is connected to the peripheral wall of the lower housing 130 and is located directly below the mounting portion 300. Specifically, the first drain section 210 is located on the side of the mounting portion 300 facing the water inlet 132, and the pipe joint 400 is also located below the mounting portion 300. The first drain section 210 extends away from the pump housing 100, extending toward the outside of the pump housing 100. Specifically, the first drain section 210 extends perpendicular to the rotation axis of the impeller 150, extending radially in the direction of the impeller 150. The first drain section 210 extends in the same direction as the mounting portion 300, i.e., both are perpendicular to the rotation axis of the impeller 150. Therefore, when the drain pump is mounted on the side panel of the housing 700, the mounting portion 300, the drain portion 200, and the pipe connector 400 all face the side panel of the housing 700. This allows the mounting portion 300 to be directly fixed to the side panel of the housing 700, and the pipe connector 400 to be snapped into the opening in the side panel of the housing 700. This facilitates installation and occupies a small amount of installation space. Of course, the first drain section 210 can also extend obliquely upward or downward.

[0096] Because the drain portion 200 is connected to the lower housing 130, and both the drain portion 200 and the pipe connector 400 are located below the mounting portion 300, when installing the drain pump, the drain pump's mounting position is moved upward, positioning the drain portion 200 and the pipe connector 400 above the sidewall of the water receiving pan 800 to prevent interference between the drain portion 200 and the pipe connector 400 and the sidewall of the water receiving pan 800. This also causes the water inlet 132 to move upward, increasing the distance between the water inlet 132 and the water collection chamber 810 of the water receiving pan 800, making it difficult to effectively drain the condensed water in the water receiving pan 800.

[0097] As shown in Figures 3 and 4 , it can be understood that, for this purpose, the maximum distance between the centerlines of the water inlet 132 and the water outlet 133 along the axial direction of the impeller 150 is defined as H1. The water outlet 133 can be rectangular or circular, for example. A reference line passing through the center of the water outlet 133 and perpendicular to the rotation axis of the impeller 150 is the centerline of the water outlet 133. H1 satisfies the following requirement: H1 ≥ 30 mm. In other words, the distance between the centerlines of the water inlet 132 and the water outlet 133 is guaranteed to be at least 30 mm. This ensures that the distance between the drain portion 200 or the pipe joint 400 and the water inlet 132 is sufficiently large. This prevents interference between the drain portion 200 and the pipe joint 400 and the sidewalls of the water receiving tray 800 when the drain pump is installed, while also ensuring that the water inlet 132 can be positioned within the water collection chamber 810 of the water receiving tray 800, effectively draining condensed water from the water receiving tray 800. Of course, it is easy to understand that the maximum value of H1 cannot be infinite. The maximum value of H1 can be set according to the maximum installation height of the drainage pump in the indoor unit to ensure that the water inlet 132 can be placed in the water collection chamber 810 of the water receiving tray 800. It will not be repeated here.

[0098] Referring to Figures 5 to 7 , in other embodiments, it can be understood that the drain portion 200 includes a first drain section 210 and a second drain section 220. Specifically, one end of the first drain section 210 is connected to the outer peripheral wall of the lower housing 130 and to the water outlet 133. The first drain section 210 extends away from the pump housing 100, that is, it extends toward the outside of the pump housing 100. Specifically, the extension direction of the first drain section 210 is perpendicular to the rotation axis of the impeller 150, that is, the first drain section 210 extends radially from the impeller 150. One end of the second drain section 220 is connected to the other end of the first drain section 210. The other end of the second drain section 220 extends away from the water inlet 132. Specifically, the second drain section 220 extends upward along the rotation axis of the impeller 150. Therefore, the first drain section 210 is perpendicular to the rotation axis of the impeller 150, and the second drain section 220 is perpendicular to the first drain section 210. To avoid interference between the second drainage section 220 and the mounting portion 300 , the projections of the first drainage section 210 and the mounting portion 300 in the axial direction of the impeller 150 do not overlap.

[0099] Of course, the first drainage segment 210 may also extend obliquely upward or downward, and the second drainage segment 220 may also extend obliquely upward relative to the rotation axis of the impeller 150, so the first drainage segment 210 and the second drainage segment 220 may not be perpendicular.

[0100] Referring to Figures 5 to 8 , it can be understood that the pipe joint 400 is connected to the other end (i.e., the upper end) of the second drain section 220, and is located above the mounting portion 300. To ensure that the pipe joint 400 and the mounting portion 300 face the same direction, the pipe joint 400 is provided with a 90° elbow, which is connected to the upper end of the second drain section 220. Therefore, when the drain pump is mounted on the side panel of the housing 700, both the mounting portion 300 and the pipe joint 400 face the side panel, allowing the mounting portion 300 to be directly secured to the side panel of the housing 700, while the pipe joint 400 is clipped into the opening in the side panel of the housing 700. This facilitates installation and minimizes installation space. Moreover, since the pipe joint 400 is arranged on the upper side of the mounting portion 300, under the premise that the extension length of the first drainage section 210 is short and will not interfere with the side wall of the water receiving tray 800, the distance between the mounting portion 300 and the water inlet 132 is large. Even if the installation position of the drainage pump is moved downward so that the water inlet 132 is placed in the water collecting chamber 810 of the water receiving tray 800, the mounting portion 300 will not interfere with the side wall of the water receiving tray 800, and the installation structure is reasonable.

[0101] It can be understood that, based on the fact that the pipe joint 400 is located on the upper side of the mounting portion 300, since the distance between the mounting portion 300 and the water inlet 132 is large enough, when the maximum distance from the center line of the water inlet 132 to the water outlet 133 is too large, the installation height of the drain pump will be higher, and the installation space occupied by the drain pump will be large, affecting the layout of other pipelines inside the indoor unit.

[0102] As shown in Figures 7 and 8 , it can be understood that, to achieve this, the maximum distance between the centerlines of the water inlet 132 and the water outlet 133 along the axial direction of the impeller 150 is defined as H2, satisfying the following: H2 < 30 mm. In other words, by ensuring that the maximum distance between the centerlines of the water inlet 132 and the water outlet 133 is less than 30 mm, the drain pump can be installed downward to position the water inlet 132 within the water collection chamber 810 of the water receiving tray 800. This reduces the distance between the mounting portion 300 and the sidewalls of the water receiving tray 800 without interfering with them, thereby reducing the height space occupied by the drain pump. This reduces the installation space occupied by the drain pump, facilitating the layout of other piping within the indoor unit. Of course, it is readily understood that the minimum value of H2 should be set to ensure that the mounting portion 300 does not interfere with the sidewalls of the water receiving tray 800, and this will not be further elaborated here.

[0103] As shown in Figure 6 , it can be understood that, given that the drain portion 200 includes a first drain section 210 and a second drain section 220, and the pipe joint 400 is located above the mounting portion 300, the angle θ between the centerlines corresponding to the projections of the mounting portion 300 and the first drain section 210, within the axial projection plane of the impeller 150, satisfies the following: 0 < θ ≤ 45°. The centerline here is a reference line passing through the center of the corresponding projection and coplanar with the rotational axis of the impeller 150. Since both the mounting portion 300 and the first drain section 210 extend radially along the pump housing 100, the angle θ between the mounting portion 300 and the extension direction of the first drain section 210 is also defined as θ. Consequently, the mounting portion 300, drain portion 200, and pipe joint 400 occupy a narrower area circumferentially around the pump housing 100, thereby reducing the radial space occupied by the drain pump as a whole within the pump housing 100. This reduces the installation space occupied by the drain pump within the indoor unit, facilitating the layout of other piping within the indoor unit.

[0104] 6 and 8 , it can be understood that, specifically, θ = 45°. That is, when viewed from above, the angle between the extension direction of the mounting portion 300 and the extension direction of the first drain section 210 is 45°. Generally speaking, when the drain pump is mounted on the side panel of the housing 700, the extension direction of the mounting portion 300 is perpendicular to the side panel of the housing 700, and the drain pump is positioned as close as possible to two adjacent side walls of the water tray 800, which are typically perpendicular to each other. Therefore, when the drain pump is fixed to the side panel of the casing 700 through the mounting portion 300, the first drain section 210 can be aligned with the connection between the two adjacent side walls of the water receiving tray 800, that is, the corner position of the water receiving tray 800. The space at this corner position is larger than the space between the side wall of the water receiving tray 800 and the pump casing 100, so that the drain pump can be closer to the side wall of the water receiving tray 800, that is, the drain pump is closer to the side panel of the casing 700, which is beneficial to reducing the installation space occupied by the drain pump in the indoor unit.

[0105] As shown in Figures 1 and 5, it can be understood that the mounting portion 300 includes a flange portion 310, which is located at the end of the mounting portion 300 facing away from the pump housing 100. The flange portion 310 is configured as a flange plate, which is perpendicular to the extension direction of the mounting portion 300, that is, the flange plate is parallel to the rotation axis of the impeller 150. Therefore, the flange plate can be fixed to the side plate of the housing 700 using screws, bolts, and other components to achieve the installation of the drain pump on the side plate of the housing 700. This prevents the drain pump from tilting relative to the side plate of the housing 700. When the side plate of the housing 700 is perpendicular to the horizontal plane, the centerline of the impeller 150 in the drain pump is also perpendicular to the horizontal plane, which facilitates drainage and provides a stable and reliable connection for the drain pump.

[0106] 1 and 5 , it can be understood that the flange portion 310 includes a connecting portion 320, which can be a screw hole, a screw, or a bolt. For example, the connecting portion 320 is configured as a screw hole, and the flange portion 310 is provided with two screw holes, which are arranged symmetrically about the centerline of the flange portion 310, and the openings of the two screw holes are both arranged away from the pump housing 100. Therefore, screws or bolts can be used to cooperate with the screw holes to fix the flange portion 310 to the side panel of the housing 700, and the connection is stable and reliable.

[0107] 1 and 5 , it can be understood that the flange portion 310 includes a positioning portion 330, and the positioning portion 330 can be a recessed portion or a convex portion. For example, the positioning portion 330 is configured as a convex portion, such as a positioning column, which is located on the side of the flange portion 310 facing away from the pump housing 100. The flange portion 310 is provided with two positioning columns, which are arranged symmetrically about the center line of the flange portion 310. Correspondingly, the side panel of the housing 700 is provided with two positioning holes through which the two positioning columns can pass. Therefore, when installing the drain pump, the two positioning columns can be respectively inserted into the two positioning holes on the side panel of the housing 700 to locate the installation position of the drain pump, so that the screws or bolts on the side panel of the housing 700 can be accurately screwed into the screw holes on the flange portion 310, reducing the difficulty of installation.

[0108] Of course, it is understandable that when the positioning portion 330 is configured as a concave portion, the side panel of the housing 700 is configured as a corresponding convex portion.

[0109] As shown in Figure 3, it can be understood that the drain pump is also equipped with a control unit 640, which can be a control circuit board, controller, or other structure. The control unit 640 is electrically connected to the motor (i.e., the drive unit 600). Generally speaking, the control unit 640 is connected to a power cord and a control line, which are electrically connected to the air conditioner's control system. Therefore, the control unit 640 can power the motor and issue control commands, thereby achieving closed-loop control of the drive unit 600. For example, the control unit 640 can control the speed of the motor (i.e., the drive unit 600) based on control signals such as manually issued commands or commands obtained by sensors, thereby adjusting the speed of the impeller 150 and adjusting the drainage pump's head, thereby helping to control noise and energy consumption. For example, when the liquid level sensor detects a low water level in the water tray 800, it transmits a signal to the control unit 640, which then reduces the motor speed and the drainage pump's head, thereby reducing noise and energy consumption.

[0110] 4 and 8 , a second embodiment of the present application provides an air conditioner, comprising a housing 700 and a drain pump according to any of the above embodiments, wherein the mounting portion 300 is fixedly connected to a side panel of the housing 700. In this case, the drain portion 200 is located on a side of the pump housing 100 facing the side panel of the housing 700.

[0111] Since the air conditioner adopts all the technical solutions of the drainage pump of the above embodiment, it has at least all the beneficial effects brought about by the technical solutions of the above embodiment.

[0112] When the air conditioner is cooling, the indoor air exchanges heat with the heat exchanger, producing condensed water, which collects in the water tray. To ensure that the condensed water does not leak out of the water tray and cause leakage, some air conditioners typically use a water pump to drain the condensed water. Because the water pump's installation space is limited, the pump is relatively short. For example, as shown in FIG9 , for ease of subsequent distinction, the existing water pump will be referred to as a standard water pump 2000, and the improved water pump will be referred to as a drainage pump 1000. The water outlet 124 of the standard water pump 2000 is located on the lower housing 130, resulting in the height of the water outlet 124 being lower than the sidewall of the water tray 900. To achieve this, a rubber hose 2100 is required. As shown in FIG10 , one end of the rubber hose 2100 is connected to the water outlet 124, and the other end is connected to the mounting plate 910. This increases the space occupied by the standard water pump 2000, hindering the routing of pipes and cables for the motor 600.

[0113] In order to increase the height of the water outlet 124, as shown in Figures 11, 12 and 13, a drainage pump 1000 provided in an embodiment of the third aspect of the present application includes a lower housing 130, an impeller 150, a motor 600, an intermediate housing 120 and a lifting mechanism 500. The interior of the lower housing 130 is provided with a water inlet 132, a first installation cavity 140 and a first water channel 160. The water inlet 132 is located at the lower end of the lower housing 130. The first installation cavity 140 is located at the upper end of the lower housing 130 and is connected to the water inlet 132. The impeller 150 is installed in the first installation cavity 140. As shown in Figure 6, the first installation cavity 140 is provided with a communication port 141, and the first water channel 160 is connected to the first installation cavity 140 through the communication port 141. For example, the communication port 141 is located on the side wall of the first installation cavity 140. When the impeller 150 draws water from the water inlet 132 into the first installation cavity 140 , the impeller 150 can throw the water out to the sidewall of the first installation cavity 140 , which helps the water flow into the first water channel 160 through the communication port 141 .

[0114] As shown in Figure 11, the intermediate housing 120 is connected to the upper end of the lower housing 130, and the connection method can be a snap connection, a fastener connection, a threaded connection, etc. A second installation cavity 122 and a third installation cavity 123 are provided in the intermediate housing 120, and the second installation cavity 122 and the third installation cavity 123 are located at one end close to the first installation cavity 140. As shown in Figure 12, the outer wall of the intermediate housing 120 is provided with a water outlet 124 connected to the third installation cavity 123. For example, the outer wall of the intermediate housing 120 is provided with a drain pipe 126, and the drain pipe 126 is formed with a water outlet 124 connected to the third installation cavity 123. The motor 600 is installed in the second installation cavity 122, and the motor 600 is configured to drive the impeller 150 to rotate. For example, the motor 600 includes a rotating shaft 630, and the rotating shaft 630 is fixedly connected to the main shaft of the impeller 150. Lifting mechanism 500 is mounted within third mounting cavity 123 and includes a second water channel 510. The two ends of second water channel 510 connect to first water channel 160 and water outlet 124, respectively. Referring to FIG. 13 , the dotted line with arrows in FIG. 13 indicates the direction of water flow. Driven by impeller 150, second water channel 510 directs water from first water channel 160 to water outlet 124.

[0115] By adopting the above solution, when the impeller 150 rotates under the drive of the motor 600, water flows into the first installation cavity 140 through the water inlet 132, then enters the first water channel 160 and the second water channel 510 in sequence, and finally flows out of the water outlet 124. Because the water outlet 124 is located in the intermediate housing 120 rather than in the lower housing 130, and a lifting mechanism 500 is provided inside the intermediate housing 120 to guide the water to the water outlet 124, the height of the water outlet 124 of the drain pump 1000 can be increased, reducing or eliminating the need for the rubber hose 2100, thereby reducing the space occupied by the drain pump 1000 and facilitating the routing of pipes and wires, such as the wiring of the motor 600 cables and the arrangement of the refrigerant pipes.

[0116] As shown in Figure 14 , in the embodiment of the present application, the first water channel 160 is a first groove 161 formed between the inner wall 143 of the first mounting cavity 140 and the outer wall 170 of the lower housing 130. A communication port 141 is provided on the inner wall 143 of the first mounting cavity 140. The outlet of the first water channel 160 is located on the end face of the lower housing 130 facing the lifting mechanism 500. Therefore, when the lifting mechanism 500 and the end faces of the lower housing 130 abut, they can seal the perimeter of the outlet of the first groove 161, forming a first flow path. The sealing engagement between the lifting mechanism 500 and the lower housing 130 can reduce or prevent water from seeping from the outlet of the first groove 161 to other locations. In another embodiment of the present application, the first water channel 160 can also be a water pipe, with one end connected to the communication port 141 and the other end connected to the second water channel 510. The appropriate solution will be selected based on actual circumstances. For ease of explanation, the following description will use the first water channel 160 as the first groove 161 as an example.

[0117] As shown in FIG15 , in the embodiment of the present application, on a projection plane perpendicular to the rotation axis of the impeller 150, the inner wall surface 143 of the first mounting cavity 140 forms a first contour line 142. The first contour line 142 is circular, and the wall surface of the first groove 161 near the outer side of the lower housing 130 forms a second contour line 162. The first contour line 142 and the second contour line 162 are tangent to each other. With this solution, water flows in a tangential direction, which can reduce water resistance, minimize flow losses, and improve the smoothness of water flow.

[0118] 11 and 12 , in an embodiment of the present application, the second water channel 510 is a second groove 511 formed on the outer wall of the lifting mechanism 500, and at least a portion of the outer wall of the lifting mechanism 500 is in contact with the side wall of the third mounting cavity 123, thereby closing a portion of the opening of the second groove 511 to form a sealed second flow path, reducing or avoiding water seepage. One end of the second groove 511 is connected to the first groove 161, and the other end is connected to the water outlet 124, thereby directing the water flow from the first groove 161 to the water outlet 124. In another embodiment, the second water channel 510 can also be a water pipe, one end of the water pipe is connected to the first groove 161, and the other end is connected to the water outlet 124. The form of the second water channel 510 is selected according to actual conditions. For the sake of convenience, the following description will take the second water channel 510 as the second groove 511 as an example.

[0119] Continuing with reference to Figures 11 and 12, in an embodiment of the present application, the second groove 511 includes a first groove section 512 and a second groove section 513, and the first groove section 512 and the second groove section 513 are connected, and the connection is at an angle transition. The transition connection can reduce the pressure loss caused by the direct impact of the water flow to improve the drainage efficiency. The first groove section 512 extends upward and obliquely, and the inclination angle of the second groove section 513 relative to the axis of the drainage pump 1000 is greater than the inclination angle of the first groove section 512. Therefore, the inclination angle between the second groove section 513 and the horizontal plane is smaller, which is conducive to the upward flow of water and improves the smoothness of drainage of the drainage pump 1000.

[0120] As shown in Figure 12, in the embodiment of the present application, the first slot section 512 is located on the side close to the first groove 161, the second slot section 513 is located on the side close to the water outlet 124, and the width of the outlet of the second slot section 513 is greater than the width of the inlet of the first slot section 512. The width of each slot section here refers to: the arc length between the two end points of the slot section along the outer circumference of the lifting mechanism 500. It can be understood that the outlet width of the second slot section 513 is large, which improves the smoothness of water outlet; and the position of the water outlet 124 can be adjusted according to actual needs, for example, the water outlet 124 can be offset to the middle position of the intermediate shell 120. In addition, the position accuracy requirements for the water outlet 124 are also lower, which reduces the requirements for processing accuracy and assembly accuracy.

[0121] In another embodiment of the present application, the second groove 511 may further include multiple groove segments, with the number of groove segments being three or more. The multiple groove segments are connected by arc transitions to reduce pressure loss and improve drainage efficiency. The appropriate solution may be selected based on actual conditions.

[0122] 11 and 17 , in an embodiment of the present application, a shaft portion 127 is provided in the intermediate housing 120, and the shaft portion 127 and the inner wall of the intermediate housing 120 are spaced apart so that an annular third installation cavity 123 is formed between the outer wall of the shaft portion 127 and the inner wall of the intermediate housing 120. The lifting mechanism 500 is sleeve-shaped and sleeved on the shaft portion 127, which can simplify the installation process and improve installation efficiency. Part of the second installation cavity 122 is formed inside the shaft portion 127, which facilitates the rotation shaft 630 of the motor 600 to pass through the second installation cavity 122 and connect with the impeller 150. Therefore, the structural design of the drainage pump 1000 is reasonable and compact, which is conducive to the miniaturization of the drainage pump 1000.

[0123] As shown in Figures 16 and 17 , in an embodiment of the present application, a first stopper 520 is provided on the outer wall of the lifting mechanism 500, and a second stopper 125 is provided on the sidewall of the third mounting cavity 123. The first stopper 520 and the second stopper 125 cooperate to restrict rotation of the lifting mechanism 500 relative to the intermediate housing 120, ensuring constant communication between the first groove 161 and the second groove 511. For example, the first stopper 520 is a first flat position, and the second stopper 125 is a second flat position. The first flat position is formed by cutting away a portion of the outer wall of the lifting mechanism 500, while the second flat position is formed by adding a protrusion to the sidewall of the third mounting cavity 123. The cooperation of the first and second flat positions prevents rotation of the lifting mechanism 500 relative to the intermediate housing 120, resulting in a simple and reliable structure. In another embodiment, in addition to the first and second flat positions, a snap-fit ​​and slot arrangement can also be employed. The appropriate arrangement can be selected based on practical needs.

[0124] When the impeller 150 is not installed in place, an eccentricity problem will occur. The eccentricity can easily cause the impeller 150 to hit the inner wall of the water inlet 132 during rotation, thereby generating abnormal noise and affecting the smooth operation of the impeller 150. Among them, the inner diameter of the water inlet 132 is determined by the air discharge capacity of the impeller 150. Blindly increasing the inner diameter of the water inlet 132 will make the speed of the incoming air less than the emptying capacity of the impeller 150, thereby causing the drainage pump 1000 to be unable to drain. Therefore, increasing the inner diameter of the water inlet 132 means that the diameter of the impeller 150 needs to be increased simultaneously, but this will cause the volume of the drainage pump 1000 to increase. In other words, the problem of the impeller 150 hitting the wall cannot be solved directly by increasing the inner diameter of the water inlet 132. To this end, referring to Figure 3, in an embodiment of the present application, the inner diameter of the water inlet 132 gradually increases along the water suction direction of the drainage pump 1000. For example, the inner diameter of the water inlet 132 gradually increases from bottom to top, while the inner diameter of the lower end of the water inlet 132 remains basically unchanged. Therefore, the overall performance of the drainage pump 1000 is less affected, and the impeller 150 can effectively reduce or avoid the collision with the inner wall of the water inlet 132, reduce the occurrence of abnormal noise, and improve the stability of the operation of the impeller 150.

[0125] Referring to Figures 11 and 18 , in an embodiment of the present application, the impeller 150 includes an inlet blade 151 located at the water inlet 132. The inlet blade 151 includes a tapered portion 152, and the width of the tapered portion 152 gradually increases along the water absorption direction. For example, the width of the tapered portion 152 gradually increases from bottom to top. It should be noted that the width of the tapered portion 152 refers to the width of the tapered portion 152 along the radial direction of the impeller 150. The use of the tapered portion 152 is equivalent to increasing the width of the inlet blade 151, which can improve the water absorption capacity. Under the same displacement, the drainage pump 1000 of the embodiment of the present application requires a lower speed, thereby reducing vibration, reducing noise, and improving the user experience. At the same speed, the drainage pump 1000 of the embodiment of the present application has a larger displacement and higher drainage efficiency.

[0126] Referring to Figure 18 , the dotted line in Figure 18 represents the rotation axis of the impeller 150. In an embodiment of the present application, the outer side surface of the tapered portion 152 is configured to be inclined toward the rotation axis of the impeller 150, and the inclination angle is α, satisfying the following: 0°<α≤60°. For example, a can be 15°, 30°, 45°, 55°, etc. When a=0°, the impeller 150 does not have the effect of increasing the drainage capacity. When a>60°, the inner diameter of the water inlet 132 needs to be increased simultaneously. Since the bottom wall of the water receiving tray 900 is usually provided with a sink, and the water inlet 132 needs to be inserted into the sink, if the inner diameter of the water inlet 132 is increased too much, the lower housing 130 will not be able to be installed in the sink, resulting in a reduction in drainage capacity. Therefore, by rationally designing the size of a, it is possible to improve the drainage capacity of the drainage pump 1000 while ensuring that the drainage pump 1000 can be smoothly installed in the sink.

[0127] As shown in Figure 11 , in the embodiment of the present application, the minimum distance d between the inner wall of the water inlet 132 and the outer surface of the tapered portion 152 satisfies the following: 2mm ≤ d ≤ 5mm. For example, d is 2.3mm, 3mm, 3.5mm, 4mm, 4.5mm, etc., and the inner wall of the water inlet 132 can be parallel to the outer surface of the tapered portion 152. When d is less than 2mm, the water inlet blades 151 are prone to contact and wear against the inner wall of the water inlet 132, generating noise and reducing the smooth operation of the impeller 150. When d is greater than 5mm, the width of the tapered portion 152 decreases, resulting in a decrease in water suction capacity and poor performance of the drainage pump 1000. Therefore, properly designing the size of d can reduce contact between the water inlet blades 151 and improve the performance and reliability of the drainage pump 1000.

[0128] Referring to Figure 20 , the dotted arrowed line in Figure 20 indicates the direction of water flow. In this embodiment of the present application, the central axis of the drain pipe 126 intersects the rotational axis of the impeller 150, meaning that the drain pipe 126 is located in the middle of the intermediate housing 120. Referring to Figure 2 , in this embodiment of the present application, a mounting base is provided on the outer wall of the intermediate housing 120, through which the drain pump 1000 is fixedly connected to the mounting plate 910, while the drain pipe 126 is connected to the mounting plate 910 via other structures. To further simplify the structure of the drain pump 1000, as shown in Figure 19 , in another embodiment of the present application, the drain pump 1000 further includes a fixing sleeve 340. The fixing sleeve 340 is disposed around the outer side of the drain pipe 126 and is fixedly connected to the intermediate housing 120. The end of the fixing sleeve 340 facing away from the intermediate housing 120 is provided with a mounting flange 341. The mounting flange 341 is configured to be fixedly connected to the mounting plate 910, thereby fixing the position of the drain pump 1000 relative to the water receiving tray 900. It is understandable that by adopting the above solution, the original mounting base solution can be eliminated and the connection can be made directly through the mounting flange 341 and the mounting plate 910, which can further simplify the structure of the drainage pump 1000, reduce the volume of the drainage pump 1000, and make its structure more compact.

[0129] Referring to Figure 21 , the dotted arrowed line in Figure 21 indicates the direction of water flow. In another embodiment of the present application, the central axis of the drain pipe 126 does not intersect the rotational axis of the impeller 150, meaning that the drain pipe 126 is offset relative to the center of the intermediate housing 120. For example, the drain pipe 126 is located tangentially to the outer wall of the intermediate housing 120, allowing water from the outlet of the second water channel 510 to flow directly into the drain pipe 126 tangentially to the lifting mechanism 500, thereby reducing water flow resistance. By arranging the drain pipe 126 in different locations, installation requirements in different situations can be met.

[0130] 11 and 12 , in the embodiment of the present application, the drain pump 1000 further includes an upper housing 110 , which is connected to the end of the intermediate housing 120 facing away from the lower housing 130 . The connection may be a snap-fit ​​connection, a fastener connection, a threaded connection, etc. The upper housing 110 is used to close the opening of the second mounting cavity 122 , thereby protecting the motor 600 from water, dust, etc.

[0131] A drainage system according to one embodiment of the present application includes a water receiving tray 900 and the drainage pump 1000 of the above embodiment. The lowest point of the water outlet 124 of the drainage pump 1000 is higher than the side wall of the water receiving tray 900. The drainage system according to the embodiment of the present application utilizes the drainage pump 1000 of the above embodiment. The lower housing 130 is provided with a water inlet 132, a first mounting cavity 140, and a first water channel 160 within the lower housing 130. The water inlet 132 communicates with the first mounting cavity 140, and the first mounting cavity 140 is equipped with an impeller 150. The intermediate housing 120 is connected to the lower housing 130. The motor 600 and the lifting mechanism 500 are respectively disposed in the second mounting cavity 122 and the third mounting cavity 123 of the intermediate housing 120. The motor 600 and the impeller 150 are drivingly connected. The lifting mechanism 500 is provided with a second water channel 510 that communicates with the first water channel 160. The second water channel 510 communicates with the water outlet 124 on the outer wall of the intermediate housing 120. When the impeller 150 rotates under the drive of the motor 600, water flows into the first installation cavity 140 through the water inlet 132, then enters the first water channel 160 and the second water channel 510 in sequence, and finally flows out of the water outlet 124. In this embodiment, by arranging the water outlet 124 in the intermediate housing 120 and providing a lifting mechanism 500 inside the intermediate housing 120 to guide water to the water outlet 124, compared with the related art in which the water outlet 124 is arranged in the lower housing 130, the height of the water outlet 124 of the drainage pump 1000 can be increased, and the use of the rubber hose 2100 can be reduced or even eliminated, thereby reducing the space occupied by the drainage pump 1000 and facilitating wiring and piping.

[0132] As shown in Figure 19 , in the embodiment of the present application, the drainage system further includes a mounting plate 910 and an adapter 370. The mounting plate 910 is provided with a through-hole 911. The adapter 370 is disposed on the side of the mounting plate 910 facing away from the mounting flange 341. The adapter 370 includes a connecting pipe 371, which is inserted into the drain pipe 126 through the through-hole 911. The adapter 370 is made of rubber, silicone, or the like. The adapter 370 facilitates the connection of an external pipe to divert condensed water away from the air conditioner, for example, directly to the outdoors.

[0133] Since the drainage system of the embodiment of the present application adopts all the technical solutions of the drainage pump 1000 of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here.

[0134] An air conditioner according to one embodiment of the present application includes the drainage system of the above embodiment. The drainage pump 1000 of the drainage system comprises a water inlet 132, a first mounting cavity 140, and a first water channel 160 disposed within a lower housing 130. The water inlet 132 communicates with the first mounting cavity 140, and an impeller 150 is mounted in the first mounting cavity 140. The intermediate housing 120 is connected to the lower housing 130. A motor 600 and a lifting mechanism 500 are disposed within the second mounting cavity 122 and the third mounting cavity 123 of the intermediate housing 120, respectively. The motor 600 is drivingly coupled to the impeller 150. The lifting mechanism 500 includes a second water channel 510 that communicates with the first water channel 160. The second water channel 510 communicates with the water outlet 124 on the outer wall of the intermediate housing 120. When the impeller 150 rotates, driven by the motor 600, water flows through the water inlet 132 into the first mounting cavity 140, then sequentially into the first and second water channels 160 and 510, before exiting through the water outlet 124. In this embodiment, the water outlet 124 is arranged in the middle shell 120, and a lifting mechanism 500 is provided inside the middle shell 120 to guide water to the water outlet 124. Therefore, compared with the related art in which the water outlet 124 is arranged in the lower shell 130, the height of the water outlet 124 of the drainage pump 1000 can be increased, and the use of the rubber hose 2100 can be reduced or even eliminated, so as to reduce the space occupied by the drainage pump 1000 and facilitate wiring and piping.

[0135] Since the air conditioner of the embodiment of the present invention adopts all the technical solutions of the drainage system of the above embodiment, it has at least all the beneficial effects brought about by the technical solutions of the above embodiment, which will not be described in detail here.

[0136] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present application.

Claims

1. Drain pump, installed inside the air conditioner casing, including: A pump housing is provided with a first installation cavity, a water inlet is provided at the bottom of the pump housing, and the water inlet is communicated with the first installation cavity; An impeller rotatably disposed in the first mounting cavity; A mounting portion, disposed on a peripheral wall of the pump housing, the mounting portion being connected to the housing; as well as The drainage part is arranged on the peripheral wall of the pump housing, the drainage part is provided with a drainage channel, the drainage channel is communicated with the first installation cavity, and the drainage part is located on the side of the pump housing facing the casing.

2. The drainage pump according to claim 1, wherein: The drainage portion includes a first drainage section, which is connected to the peripheral wall of the pump housing and extends in a direction away from the pump housing, and is located on a side of the mounting portion facing the water inlet.

3. The drainage pump according to claim 2, wherein: A water outlet is provided on the peripheral wall of the pump housing, and the water outlet is located on the side of the mounting portion facing the water inlet and is connected with the first mounting cavity and the drainage channel. Along the axial direction of the impeller, the maximum distance from the center line of the water inlet to the water outlet is H1, satisfying: H1≥30mm.

4. The drainage pump according to claim 2 or 3, wherein: The drainage portion further includes a second drainage section, which is connected to an end of the first drainage section away from the pump housing, and the second drainage section is extended in a direction away from the water inlet.

5. The drainage pump according to claim 4, wherein: The first drainage section is perpendicular to the rotation axis of the impeller, and the second drainage section is perpendicular to the first drainage section.

6. The drainage pump according to claim 4 or 5, wherein: A water outlet is provided on the peripheral wall of the pump housing, and the water outlet is located on the side of the mounting portion facing the water inlet and is connected with the first mounting cavity and the drainage channel. Along the axial direction of the impeller, the maximum distance from the center line of the water inlet to the water outlet is H2, satisfying: H2<30mm.

7. The drainage pump according to any one of claims 4 to 6, wherein: The mounting portion is extended in a direction away from the pump casing. In a projection plane perpendicular to the axial direction of the impeller, an angle θ between the mounting portion and a center line corresponding to the projection of the first drainage section satisfies: 0<θ≤45°.

8. The drainage pump according to any one of claims 1 to 7, wherein: The mounting portion comprises a flange portion, and the flange portion is located at an end of the mounting portion away from the pump housing.

9. The drainage pump according to claim 8, wherein: The flange portion includes a connecting portion, and the connecting portion is used to fix the flange portion.

10. The drainage pump according to claim 8 or 9, wherein: The flange portion includes a positioning portion, and the positioning portion is used to position the installation position of the flange portion. 11 . The drainage pump according to claim 1 , further comprising a pipe joint, wherein the pipe joint is connected to the drainage portion and is used for docking with a drainage pipe. 12 . The drainage pump according to claim 1 , further comprising a control unit and a driving unit, wherein the driving unit is connected to the impeller and is used to drive the impeller to rotate, and the control unit is electrically connected to the driving unit.

13. An air conditioner, characterized in that include: A casing and the drain pump according to any one of claims 1 to 12, wherein the mounting portion is mounted on the casing.

14. Drain pump, including: A pump housing, wherein a water inlet, a first installation cavity and a first water channel are provided inside, wherein the water inlet is located at one end of the pump housing, the first installation cavity is located at the other end of the pump housing, and the first water channel is connected to the first installation cavity; An impeller is installed in the first installation cavity; An upper housing connected to the pump housing, wherein a second installation cavity and a third installation cavity located near one end of the first installation cavity are provided in the pump housing, and an outer side wall of the pump housing is provided with a water outlet communicating with the third installation cavity; a motor, installed in the second installation cavity, wherein the motor is configured to drive the impeller to rotate; and A lifting mechanism is configured to guide the water flow of the first water channel to the water outlet, and the lifting mechanism is installed on the third installation In the cavity, the lifting mechanism is provided with a second water channel, and the second water channel is connected with the first water channel and the water outlet.

15. The drainage pump according to claim 14, wherein: At least part of the outer wall of the lifting mechanism is in contact with the side wall of the third installation cavity. The second water channel is a second groove formed on the outer wall of the lifting mechanism. One end of the second groove is connected to the first water channel, and the other end of the second groove is connected to the water outlet.

16. The drainage pump according to claim 15, wherein: The second groove includes a first groove section and a second groove section, wherein the first groove section and the second groove section form an angle with each other and are transitionally connected.

17. The drainage pump according to claim 16, wherein: The first trough section is located on a side close to the first water channel, the second trough section is located on a side close to the water outlet, and the width of the outlet of the second trough section is greater than the width of the inlet of the first trough section.

18. The drainage pump according to any one of claims 15 to 17, wherein: The second groove includes a plurality of connected groove segments, and the plurality of groove segments are connected by arc transition.

19. The drainage pump according to any one of claims 14 to 18, wherein: A shaft portion is arranged in the upper shell body, and the lifting mechanism is sleeve-shaped and sleeved on the shaft portion.

20. The drainage pump according to any one of claims 15 to 19, wherein: The outer side wall of the lifting mechanism is provided with a first limiting portion, and the side wall of the third installation cavity is provided with a second limiting portion, and the second limiting portion cooperates with the first limiting portion to limit the relative rotation of the lifting mechanism and the upper shell.

21. The drainage pump according to any one of claims 14 to 20, wherein: The first water channel is a first groove formed between the inner wall surface of the first installation cavity and the outer wall surface of the pump housing, the inner wall surface of the first installation cavity is provided with a communication port, and the first groove is connected to the first installation cavity through the communication port; The outlet of the first water channel is located at the end surface of the pump housing close to the lifting mechanism.

22. The drainage pump according to claim 21, wherein Projected along the rotation axis of the impeller, the inner wall surface of the first installation cavity forms a first contour line, the first contour line is circular, the wall surface of the first groove close to the outer side of the pump shell is a second contour line, and the first contour line is tangent to the second contour line.

23. The drainage pump according to any one of claims 14 to 22, wherein: The inner diameter of the water inlet gradually increases along the water suction direction of the drainage pump.

24. The drainage pump according to claim 23, wherein: The impeller comprises a water inlet blade located at the water inlet, the water inlet blade comprises a tapered portion, and the width of the tapered portion gradually increases along the water suction direction.

25. The drain pump according to claim 24, wherein: The outer side surface of the tapered portion is configured to be inclined toward the rotation axis of the impeller, and the inclination angle is α, satisfying: 0°<α≤60°.

26. The drainage pump according to claim 24 or 25, wherein: The minimum distance between the inner wall of the water inlet and the outer side surface of the tapered portion is d, which satisfies: 2mm≤d≤5mm.

27. The drain pump according to any one of claims 124 to 26, further comprising a drain pipe, wherein the drain pipe is fixedly connected to the outer side wall of the upper shell, and an inner hole of the drain pipe is connected to the water outlet.

28. The drainage pump according to claim 27, further comprising a fixing sleeve for mounting the drainage pump, wherein the fixing sleeve is disposed around the outside of the drainage pipe, and a mounting flange is disposed at an end of the fixing sleeve.

29. Drainage system, including: Drain tray; as well as The drainage pump according to any one of claims 14 to 28, wherein the lowest point of the water outlet of the drainage pump is higher than the side wall of the water receiving tray.

30. An air conditioner comprising the drainage system according to claim 29.

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