Drain pumps and air conditioners

Abstract

This invention discloses a drainage pump and an air conditioner. The drainage pump includes a pump casing, an impeller, and a rotor. The pump casing has a pump cavity, and the impeller is rotatably installed in the pump cavity. The rotor includes a shaft connected to the impeller. The pump casing also has a bearing chamber located on the side of the pump cavity facing the rotor. A bearing is installed in the bearing chamber and fitted onto the shaft. During installation, the pump casing can be used as a positioning reference. By providing a bearing chamber on the side of the pump cavity facing the rotor, and installing a bearing in the bearing chamber, the shaft of the rotor passes through the bearing and connects to the impeller. This ensures the concentricity of the rotor and the impeller, improves the stability of the drainage pump operation, and reduces the vibration and noise generated during the operation of the drainage pump.

Description

Technical Field

[0001] This invention relates to the field of drainage pump technology, and particularly to a drainage pump and an air conditioner. Background Technology

[0002] In related technologies, when an air conditioner is cooling, condensation forms on the surface of the heat exchanger. This condensation drips down the heat exchanger surface into a condensate drain pan below. To drain the condensation to a position higher than the outlet of the condensate drain pan, an air conditioner typically has a drain pump installed at the condensate drain pan. However, existing drain pumps often have difficulty ensuring the concentricity of the impeller and rotor during installation, resulting in increased vibration and noise during operation. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a drainage pump that can reduce vibration and noise during operation.

[0004] The present invention also provides an air conditioner having the above-mentioned drain pump.

[0005] A drainage pump according to a first aspect of the present invention includes:

[0006] Pump housing, wherein the pump housing is provided with a pump chamber;

[0007] An impeller, which is rotatably mounted inside the pump chamber;

[0008] The rotor section includes a shaft connected to the impeller;

[0009] The pump casing is further provided with a bearing chamber, which is located on the side of the pump cavity facing the rotor. A bearing is installed in the bearing chamber and is sleeved on the rotating shaft.

[0010] The drainage pump according to the first aspect of the present invention has at least the following beneficial effects:

[0011] During installation, the pump casing can be used as a positioning reference. The pump casing has a bearing chamber on the side of the pump cavity facing the rotor. The bearing chamber contains a bearing, and the rotor shaft passes through the bearing and connects to the impeller. This ensures the concentricity of the rotor and the impeller, improves the stability of the drainage pump operation, and reduces the vibration and noise generated during the operation of the drainage pump.

[0012] According to some embodiments of the present invention, the pump housing is further provided with an annular support wall surrounding the outer periphery of the bearing chamber, the inner wall of the annular support wall abutting against the outer wall of the bearing chamber.

[0013] According to some embodiments of the present invention, the annular support wall includes a first annular portion and a second annular portion, the first annular portion is disposed around the outer periphery of the second annular portion, a first rib plate is disposed on the inner side of the second annular portion abutting against the outer wall of the bearing chamber, and a second rib plate is disposed on the outer side of the second annular portion abutting against the inner wall of the first annular portion.

[0014] According to some embodiments of the present invention, a plurality of first ribs are provided, and the plurality of first ribs are evenly spaced along the circumferential direction.

[0015] According to some embodiments of the present invention, the drainage pump further includes a stator portion sleeved around the outer periphery of the rotor portion, the end of the first annular portion extending into the stop of the stator portion, and the outer wall of the first annular portion abutting against the inner wall of the stop.

[0016] According to some embodiments of the present invention, the drainage pump further includes a mounting bracket connected to the pump housing.

[0017] According to some embodiments of the present invention, the mounting bracket is provided with a first support position, and the end of the rotating shaft abuts against the bottom wall of the first support position.

[0018] According to some embodiments of the present invention, the mounting bracket is further provided with a second support position for supporting the stator portion.

[0019] According to some embodiments of the present invention, the pump housing includes a first pump housing and a second pump housing, the first pump housing and the second pump housing being connected and enclosing to form the pump cavity.

[0020] According to some embodiments of the present invention, the bearing chamber is disposed inside the second pump housing.

[0021] According to some embodiments of the present invention, the bearing housing has a mounting port facing away from the first pump housing.

[0022] An air conditioner according to a second aspect of the present invention includes a drain pump according to a first aspect of the present invention.

[0023] The air conditioner according to the second aspect embodiment of the present invention has at least the following beneficial effects:

[0024] Because the air conditioner uses the aforementioned drain pump, the pump casing can be used as a positioning reference during installation. The pump casing has a bearing chamber on the side of the pump cavity facing the rotor, and a bearing is installed in the bearing chamber. The rotor shaft passes through the bearing and is connected to the impeller. This ensures the concentricity of the rotor and the impeller, improves the stability of the drain pump operation, reduces the vibration and noise generated during the operation of the drain pump, and improves the comfort of using the air conditioner.

[0025] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural schematic diagram of a drainage pump according to some embodiments of the present invention;

[0027] Figure 2 yes Figure 1 Enlarged view of point A in the image;

[0028] Figure 3 This is a cross-sectional structural schematic diagram of a drainage pump according to some embodiments of the present invention;

[0029] Figure 4 This is a three-dimensional structural schematic diagram of the first pump casing according to some embodiments of the present invention;

[0030] Figure 5 yes Figure 4 Enlarged view of point B in the image;

[0031] Figure 6 This is a three-dimensional structural schematic diagram of the second pump housing according to some embodiments of the present invention;

[0032] Figure 7 This is a three-dimensional structural schematic diagram of the second pump casing from another perspective of some embodiments of the present invention;

[0033] Figure 8 This is a three-dimensional structural diagram of the mounting bracket according to some embodiments of the present invention.

[0034] Figure label:

[0035] First pump housing 100; First rotary fastener 110; Inlet end 111;

[0036] Second pump housing 200; second rotating fastener 210; notch 220; first limiting plate 230; second limiting plate 240; stop plate 250; bearing chamber 260; first annular portion 270; second annular portion 280; first rib 281; second rib 282;

[0037] Mounting bracket 300; third swivel fastener 310; mounting foot 320; first support position 330; second support position 340;

[0038] Impeller 400; Pump chamber 410;

[0039] Bearing 500;

[0040] Rotor section 600; Shaft 610;

[0041] Stator section 700. Detailed Implementation

[0042] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying 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 accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0043] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0044] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0045] In the description of this invention, unless otherwise explicitly defined, terms such as setting, installing, connecting, assembling, and cooperating should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0046] In related technologies, when an air conditioner is cooling, condensation forms on the surface of the heat exchanger. This condensation drips down the heat exchanger surface into a condensate drain pan below. To drain the condensation to a position higher than the outlet of the condensate drain pan, an air conditioner typically has a drain pump installed at the condensate drain pan. However, existing drain pumps often have difficulty ensuring the concentricity of the impeller and rotor during installation, resulting in increased vibration and noise during operation.

[0047] To address at least one of the aforementioned technical problems, the present invention proposes a drainage pump that can reduce vibration and noise during operation.

[0048] Reference Figures 1 to 3 A drainage pump provided in a first aspect embodiment of the present invention includes a pump casing, an impeller 400, and a rotor 600. The pump casing has a pump chamber 410, and the impeller 400 is rotatably mounted within the pump chamber 410. The rotor 600 includes a shaft 610 connected to the impeller 400. The shaft 610 drives the impeller 400 to rotate within the pump chamber 410, thereby generating a negative pressure at the suction port, enabling the drainage pump to draw in condensate through the suction port and then discharge it from the drain port.

[0049] Reference Figure 3 Specifically, the pump casing is also provided with a bearing chamber 260, which is located on the side of the pump cavity 410 facing the rotor 600. A bearing 500 is installed in the bearing chamber 260 and is sleeved on the rotating shaft 610, thereby providing rotational support for the rotating shaft 610.

[0050] When the drainage pump is installed, the pump casing can be used as a positioning reference. The pump casing has a bearing chamber 260 on the side of the pump cavity 410 facing the rotor 600. The bearing chamber 260 is equipped with a bearing 500. The rotating shaft 610 of the rotor 600 passes through the bearing 500 and is connected to the impeller 400. This can ensure the concentricity of the rotor 600 and the impeller 400, improve the stability of the drainage pump operation, and reduce the vibration and noise generated during the operation of the drainage pump.

[0051] Reference Figure 7 It is understood that when the drainage pump is working, the bearing 500 provides rotational support for the shaft 610. The force exerted on the bearing 500 by the shaft 610 is transmitted to the inner wall of the bearing chamber 260. To prevent the inner wall of the bearing chamber 260 from deforming due to excessive force, thus affecting the assembly accuracy of the shaft 610, in some embodiments of the present invention, the pump casing is also provided with an annular support wall surrounding the outer periphery of the bearing chamber 260, with the inner wall of the annular support wall abutting against the outer wall of the bearing chamber 260. Because of the annular support wall and its inner wall abutting against the outer wall of the bearing chamber 260, the force exerted by the shaft 610 on the inner wall of the bearing chamber 260 can be partially transmitted to the annular support wall. This reduces the deformation of the inner wall of the bearing chamber 260 due to excessive force, helps maintain the assembly accuracy of the shaft 610, and improves the stability of the drainage pump operation.

[0052] It should be noted that, in some embodiments of the present invention, the annular support wall includes a first annular portion 270 and a second annular portion 280. The first annular portion 270 is arranged around the outer periphery of the second annular portion 280. The inner side of the second annular portion 280 is provided with a first rib 281 that abuts against the outer wall of the bearing chamber 260, and the outer side of the second annular portion 280 is provided with a second rib 282 that abuts against the inner wall of the first annular portion 270. This allows the annular support wall to better distribute the applied force to the pump casing, thereby further reducing the deformation caused by the force.

[0053] Specifically, multiple first ribs 281 are provided, and the multiple first ribs 281 are evenly spaced along the circumference. Multiple second ribs 282 are also provided, and the multiple second ribs 282 are evenly spaced along the circumference. This makes the force distribution between the first annular portion 270 and the second annular portion 280, as well as between the second annular portion 280 and the outer wall of the bearing chamber 260, more uniform.

[0054] Reference Figure 3 It should be noted that, in some embodiments of the present invention, the drainage pump further includes a stator portion 700 sleeved around the outer periphery of the rotor portion 600. The end of the first annular portion 270 extends into the stop of the stator portion 700, and the outer wall of the first annular portion 270 abuts against the inner wall of the stop, so that the stator portion 700 can be sleeved on the outer wall of the first annular portion 270 through the stop, preventing the stator portion 700 from wobbling in the axial direction, thereby improving the concentricity of the assembly between the stator portion 700 and the rotor portion 600.

[0055] Reference Figure 1 It is understood that, in order to facilitate the installation of the drain pump inside the air conditioner, in some embodiments of the present invention, the drain pump further includes a mounting bracket 300, which is connected to the pump housing, thereby enabling the drain pump to be fixed to the corresponding mounting component. Specifically, the drain pump is provided with a plurality of mounting feet 320, each with bolt holes, and the mounting feet 320 are fixedly connected to the mounting component of the air conditioner by bolts passing through the bolt holes.

[0056] Reference Figure 3 It should be noted that in some embodiments of the present invention, the bottom wall of the mounting bracket 300 is recessed to form a first support position 330, and the end of the rotating shaft 610 abuts against the bottom wall of the first support position 330, so that the mounting bracket 300 can provide axial support for the rotating shaft 610, thereby further improving the smoothness of the rotation of the rotating shaft 610 and reducing the vibration and noise of the drainage pump operation.

[0057] Reference Figure 3 It is understood that, in some embodiments of the present invention, the mounting bracket 300 is further provided with a second support position 340 for supporting the stator portion 700. Specifically, the bottom wall of the mounting bracket 300 is provided with two concentric annular plates, and the second support position 340 is formed between the two annular plates. The end of the stator portion 700 is inserted into the second support position 340, thereby enabling the mounting bracket 300 to support the stator portion 700 and reducing the shaking of the stator portion 700. It should be noted that the second support position 340 has an annular structure and is arranged around the outer periphery of the first support position 330.

[0058] Reference Figure 1 and Figure 3It is understood that, in some embodiments of the present invention, the pump housing includes a first pump housing 100 and a second pump housing, which are connected and enclose to form a pump cavity 410. The first pump housing 100 and the second pump housing are connected by a snap-fit ​​structure, which is convenient for installation and disassembly. Specifically, a bearing chamber 260 is disposed inside the second pump housing, and the bearing chamber 260 has a mounting port facing away from the first pump housing 100, through which the bearing 500 can be installed into the bearing chamber 260.

[0059] Reference Figure 1 , Figure 4 and Figure 6 In some embodiments of the present invention, a first pump housing 100 is provided with a plurality of first screw fasteners 110, and a second pump housing 200 is located at one end of the first pump housing 100 along the axial direction, and the second pump housing 200 is provided with a plurality of second screw fasteners 210. The second screw fasteners 210 are capable of screwing and engaging with at least a portion of the first screw fasteners 110, so that the second pump housing 200 is detachably connected to the first pump housing 100.

[0060] During installation, the first pump housing 100 is rotated relative to the second pump housing 200 in the locking direction, allowing all the second locking parts 210 to simultaneously engage with their corresponding first locking parts 110, thus enabling a quick connection between the first pump housing 100 and the second pump housing 200. During disassembly, the first pump housing 100 is rotated relative to the second pump housing 200 in the loosening direction, allowing all the second locking parts 210 to separate from their corresponding first locking parts 110, thus enabling a quick separation between the first pump housing 100 and the second pump housing 200. Therefore, the installation and disassembly procedures for the first pump housing 100 and the second pump housing 200 are relatively simple and convenient, improving the maintainability of the drainage pump.

[0061] It should be noted that in the prior art, when the housing components are connected by snap-fit, the snap-fit ​​needs to deform under force to complete the snap-fit ​​fixation, so the snap-fit ​​is prone to breakage. However, the present invention uses a swivel structure for connection, which is not only more convenient to disassemble and assemble, but also does not rely on the deformation of parts for installation and fixation. Therefore, the overall strength of the swivel structure is higher and it is not easy to break, further improving the maintainability of the drainage pump.

[0062] Reference Figure 1 and Figure 8It should be noted that, in order to securely connect the mounting bracket 300 to the first pump housing 100, the mounting bracket 300 is provided with multiple third screw fasteners 310. The sum of the number of third screw fasteners 310 and the number of second screw fasteners 210 equals the number of first screw fasteners 110. Therefore, when a second screw fastener 210 is screwed into part of the first screw fasteners 110, a third screw fastener 310 can be screwed into the remaining first screw fasteners 110, allowing the mounting bracket 300 to be detachably connected to the first pump housing 100. Specifically, during installation, by rotating the first pump housing 100, the first screw fasteners 110 are screwed into the corresponding second screw fasteners 210 or third screw fasteners 310, thereby simultaneously connecting and securing the first pump housing 100, the second pump housing 200, and the mounting bracket 300, making operation more convenient. It should be noted that the number of third screw fasteners 310 and the number of second screw fasteners 210 can be the same or different, depending on actual needs.

[0063] Reference Figure 1 It is understood that in some embodiments of the present invention, the number of second fasteners 210 and third fasteners 310 is the same, and the two are alternately arranged along the circumference of the drain pump, so that the force distribution of the connection between the first fastener 110 and the second fastener 210, and the connection between the second fastener 210 and the third fastener 310 is more uniform, which is beneficial to improving the stability of the connection.

[0064] Reference Figure 1 , Figure 2 and Figure 6 It is understandable that the drain pump is installed inside the air conditioner, and the internal space of the air conditioner is relatively small. Therefore, in order to reduce the external size of the housing assembly and thus reduce the space occupied by the drain pump, in some embodiments of the present invention, the mounting bracket 300 is located at the end of the second pump housing 200 away from the first pump housing 100. The outer wall of the second pump housing 200 is provided with a notch 220. During installation, the third screw fastener 310 is inserted through the notch 220 and screwed to the first screw fastener 110, thereby reducing the space occupied by the third screw fastener 310 extending outward, and thus reducing the overall space occupied by the drain pump.

[0065] Reference Figure 2 and Figure 6It is understood that in some embodiments of the present invention, the second pump housing 200 is provided with a first limiting plate 230, which is located on both sides of the notch 220 in the circumferential direction, and is used to restrict the rotation of the third rotary fastener 310 in the circumferential direction. During installation, the mounting bracket 300 is placed at the end of the second pump housing 200 away from the first pump housing 100, and then the third rotary fastener 310 is inserted into the notch 220 on the outer wall of the second pump housing 200, so that the third rotary fastener 310 can be screwed and engaged with the first rotary fastener 110. When the third swivel fastener 310 is inserted into the notch 220, the first limiting plate 230 is provided on both sides of the notch 220 in the circumferential direction, which can restrict the rotation of the third swivel fastener 310 within the notch 220. This allows the mounting bracket 300 to be initially positioned on the second pump housing 200, preventing the mounting bracket 300 from shaking relative to the second pump housing 200. This facilitates the simultaneous screwing of the first swivel fastener 110 to the corresponding second swivel fastener 210 and the third swivel fastener 310 during subsequent installation operations, greatly improving the convenience of operation.

[0066] Reference Figure 2 It should be noted that the third screw fastener 310 and the first screw fastener 110 achieve screw-on engagement through surface contact friction. When the third screw fastener 310 is subjected to external force and moves radially away from the first screw fastener 110, the third screw fastener 310 will loosen relative to the first screw fastener 110, causing the screw-on engagement to fail. Therefore, in some embodiments of the present invention, the second pump housing 200 is also provided with a second limiting plate 240. The second limiting plate 240 is used to restrict the movement of the third screw fastener 310 in the direction away from the first screw fastener 110. Therefore, after the third screw fastener 310 is screwed onto the first screw fastener 110, even when affected by external forces such as vibration, the third screw fastener 310 is not easy to loosen from the first screw fastener 110, thereby making the connection between the third screw fastener 310 and the first screw fastener 110 more reliable, improving the stability of the housing assembly, and thus improving the reliability of the drainage pump operation.

[0067] It is understood that the position of the second limiting plate 240 can be specifically set according to actual needs. For example, the second limiting plate 240 and the first limiting plate 230 can be set vertically at an interval, so that the second limiting plate 240 can restrict the movement of the third rotating fastener 310 in the radial direction. Of course, the second limiting plate 240 can also be set in other positions. For example, in some embodiments of the present invention, the second limiting plate 240 is connected to the end of the first limiting plate 230 away from the outer wall. In this case, the second limiting plate 240 and the first limiting plate 230 are integrated, which is more convenient for processing. At this time, the second limiting plate 240 closes the side of the notch 220 away from the inner wall, thereby preventing the third rotating fastener 310 from moving away from the first rotating fastener 110 in the radial direction, and avoiding the third rotating fastener 310 from easily detaching from the first rotating fastener 110, which would cause the connection between the mounting bracket 300 and the first pump housing 100 to fail.

[0068] It should be noted that the number of second limiting plates 240 corresponds one-to-one with the number of notches 220, so that each third swivel fastener 310 passing through the notch 220 can be limited by the second limiting plate 240, which helps to improve the reliability of the connection between the mounting bracket 300 and the first pump housing 100.

[0069] Reference Figure 2 It is understood that the first rotary fastener 110 has a locked position. When the first pump housing 100 is rotated relative to the second pump housing 200 by a certain angle, the first rotary fastener 110 can rotate with the first pump housing 100 to the locked position, thereby engaging with the corresponding second rotary fastener 210 or third rotary fastener 310. If the first pump housing 100 continues to rotate, the first rotary fastener 110 will continue to rotate and disengage from the corresponding second rotary fastener 210 and third rotary fastener 310. Therefore, in some embodiments of the present invention, the second pump housing 200 is also provided with a stop plate 250, which is used to limit the rotation of the first rotary fastener 110. Specifically, when the first rotary fastener 110 rotates to the locked position, the stop plate 250 is located in the direction in which the first rotary fastener 110 continues to move forward. Therefore, the stop plate 250 can prevent the first rotary fastener 110 from continuing to rotate and disengaging from the corresponding second rotary fastener 210 or third rotary fastener 310. Because the second pump housing 200 is equipped with a stop plate 250, when the user rotates the first pump housing 100 so that the first locking member 110 abuts against the stop plate 250, the user can immediately know that the first locking member 110 has been rotated to the locked position without needing to continue rotating the first pump housing 100. This avoids the user having difficulty accurately rotating the first locking member 110 to the locked position, thereby improving the convenience of user operation. In addition, because the second pump housing 200 is equipped with a stop plate 250, when it is necessary to detach the first locking member 110 from the corresponding second locking member 210 or third locking member 310, it can only be achieved by rotating the first locking member 110 in a direction away from the stop plate 250. Therefore, the locking direction and the detaching direction are two opposite directions, so corresponding locking direction markings and detaching direction markings can be marked on the first pump housing 100 or the second pump housing 200, thereby further improving the convenience of use.

[0070] It should be noted that the position of the stop plate 250 can be specifically set according to actual needs. For example, the stop plate 250 can be set at the end of the outer wall of the second pump housing 200. The stop plate 250 and the first limiting plate 230 are spaced apart in the circumferential direction of the second pump housing 200. At the same time, the stop plate 250 has a stop portion extending toward the first fastener 110, which can block the first fastener 110. Of course, the stop plate 250 can also be set in other positions. For example, in some embodiments of the present invention, the stop plate 250 is set at the end of one of the first limiting plates 230. In this case, the stop plate 250 can be integral with the first limiting plate 230. For example, the stop plate 250 is a structural member formed by extending vertically from the end of the first limiting plate 230. Of course, the stop plate 250 can also be manufactured separately and then fixed to the end of the first limiting plate 230 by welding or other means, thereby playing a role in stopping the first fastener 110.

[0071] Reference Figures 4 to 8 It is understood that in some embodiments of the present invention, the first swivel fastener 110 has an L-shaped structure, and the second swivel fastener 210 and the third swivel fastener 310 both have an inverted L-shaped structure. That is, the first swivel fastener 110, the second swivel fastener 210, and the third swivel fastener 310 all include a base plate extending in the vertical direction and a connecting plate extending in the horizontal direction. Their structures are relatively simple, easy to manufacture, and the swivel operation is also relatively convenient. (Refer to...) Figure 3 Specifically, the connecting plate of the first swivel fastener 110 is connected to the end of the base plate and extends radially outward, thus making the first swivel fastener 110 have an L-shaped structure. The connecting plates of the second swivel fastener 210 and the third swivel fastener 310 are both connected to the end of the base plate and extend radially inward, thus making the second swivel fastener 210 and the third swivel fastener 310 have an inverted L-shaped structure. During installation, the two mating connecting plates are brought into contact with each other through friction, thereby achieving the swivel engagement of the first swivel fastener 110 with the corresponding second swivel fastener 210 or third swivel fastener 310.

[0072] Reference Figure 5 Specifically, the end of the rotating plate of the first rotating fastener 110 may also be provided with an inlet end 111. The thickness of the inlet end 111 gradually decreases along the locking direction, so that during installation, the first rotating fastener 110 can be smoothly rotated and engaged with the corresponding second rotating fastener 210 or third rotating fastener 310 through the inlet end 111, which is beneficial to improving the convenience of operation.

[0073] An air conditioner according to a second aspect of the present invention includes a drain pump according to a first aspect of the present invention. The drain pump is installed inside the air conditioner housing and is used to extract condensate from the condensate drain pan and discharge it to the outside.

[0074] Because the air conditioner uses the aforementioned drain pump, the pump casing can be used as a positioning reference during installation. The pump casing has a bearing chamber 260 on the side of the pump cavity 410 facing the rotor 600. A bearing 500 is installed in the bearing chamber 260. The rotating shaft 610 of the rotor 600 passes through the bearing 500 and is connected to the impeller 400. This ensures the concentricity of the rotor 600 and the impeller 400, improves the stability of the drain pump operation, reduces the vibration and noise generated during the operation of the drain pump, and improves the comfort of using the air conditioner.

[0075] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A drainage pump, characterized in that, include: Pump housing, wherein the pump housing is provided with a pump chamber; An impeller, which is rotatably mounted inside the pump chamber; The rotor section includes a shaft connected to the impeller; Mounting bracket, the mounting bracket being connected to the pump housing; The pump casing is further provided with a bearing chamber, which is located on the side of the pump cavity facing the rotor. A bearing is installed in the bearing chamber, and the bearing chamber and the bearing are sleeved in the middle region of the rotating shaft. The mounting bracket is provided with a first support position, and the end of the rotating shaft abuts against the bottom wall of the first support position. The end of the rotating shaft is not provided with a bearing. When the drainage pump is installed, the pump casing is used as the positioning reference, and the rotating shaft passes through the bearing and is connected to the impeller. The pump casing is also provided with an annular support wall surrounding the outer periphery of the bearing chamber. The inner wall of the annular support wall abuts against the outer wall of the bearing chamber. The drainage pump also includes a stator portion sleeved around the outer periphery of the rotor portion. The end of the annular support wall extends into the stop of the stator portion, and the outer wall of the annular support wall abuts against the inner wall of the stop.

2. The drainage pump according to claim 1, characterized in that: The annular support wall includes a first annular portion and a second annular portion. The first annular portion is arranged around the outer periphery of the second annular portion. A first rib plate is provided on the inner side of the second annular portion, abutting against the outer wall of the bearing chamber. A second rib plate is provided on the outer side of the second annular portion, abutting against the inner wall of the first annular portion.

3. The drainage pump according to claim 2, characterized in that: The first rib is provided in multiple ways, and the multiple first ribs are evenly spaced along the circumference.

4. The drainage pump according to claim 2, characterized in that: The end of the first annular portion extends into the stop of the stator portion, and the outer wall of the first annular portion abuts against the inner wall of the stop.

5. The drainage pump according to claim 1, characterized in that, The mounting bracket is also provided with a second support position for supporting the stator section.

6. The drainage pump according to any one of claims 1 to 5, characterized in that, The pump casing includes a first pump casing and a second pump casing, which are connected and enclose the pump cavity.

7. The drainage pump according to claim 6, characterized in that, The bearing chamber is located inside the second pump casing.

8. The drainage pump according to claim 7, characterized in that: The bearing housing has an installation port facing away from the first pump casing.

9. An air conditioner, characterized in that, Includes the drainage pump as described in any one of claims 1 to 8.

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