Drain pump and air conditioner

Abstract

The utility model provides a kind of drainage pump and air conditioner, and drainage pump includes: pump body, pump body is equipped with pump cavity, water inlet passage and drainage passage, water inlet passage and drainage passage are communicated with pump cavity respectively;Impeller, is located in pump cavity;Motor assembly, is located in pump body, and the side of motor assembly towards impeller is equipped with waterproof hole;Shaft, one end of shaft passes through waterproof hole, and is connected with motor assembly, and the other end of shaft is connected impeller;Water baffle, is sleeved in the outer circumferential wall of shaft, and at least part is located at waterproof hole, water baffle is sealingly connected with shaft, and extend along the radial direction of shaft, so that it can effectively block condensate water along shaft into the inside of motor assembly, avoid the case that motor assembly rusts, even burns out due to water in the inside of motor assembly, improve the reliability of drainage pump, conducive to prolonging the service life of drainage pump.

Description

Technical Field

[0001] This utility model relates to the field of drainage pump technology, and more specifically, to a drainage pump and an air conditioner. Background Technology

[0002] Air conditioners produce a large amount of condensate during operation, which needs to be drained by a drain pump. Currently, in related technologies, the pump chamber and motor chamber of the drain pump are generally connected. When the drain pump stops running, water accumulated in the drain pipe can backflow into the pump chamber and flow out along the motor shaft, posing a risk of water intrusion into the motor chamber. If water enters the motor chamber, it can cause motor corrosion, decreased motor performance, and in severe cases, even motor burnout, significantly reducing the reliability and lifespan of the drain pump. Utility Model Content

[0003] The embodiments of this utility model are intended to solve at least one of the technical problems existing in the prior art.

[0004] Therefore, a first aspect of the embodiments of this utility model provides a drainage pump.

[0005] A second aspect of the present invention provides an air conditioner.

[0006] In view of the above, according to a first aspect of the present invention, a drainage pump is provided, comprising: a pump body having a pump chamber, an inlet channel, and a drainage channel, the inlet channel and the drainage channel being respectively connected to the pump chamber; an impeller disposed within the pump chamber; a motor assembly disposed within the pump body, the motor assembly having a waterproof hole on the side facing the impeller; a rotating shaft having one end passing through the waterproof hole and connected to the motor assembly, the other end of the rotating shaft being connected to the impeller; and a water-blocking member fitted onto the outer peripheral wall of the rotating shaft and at least partially located at the waterproof hole, the water-blocking member being sealed to the rotating shaft and extending radially along the rotating shaft.

[0007] The drain pump provided in this embodiment includes a pump body, an impeller, a motor assembly, a rotating shaft, and a water baffle. Specifically, the pump body is provided with a pump chamber, an inlet channel, and a drain channel, and the pump chamber is connected to either the inlet channel or the drain channel. It is understood that the inlet channel is connected to the air conditioner's drip tray, which is used to collect condensate. Specifically, during the operation of the drain pump, the motor assembly drives the rotating shaft to rotate, and the rotating shaft drives the impeller to rotate within the pump chamber, thereby discharging the condensate generated during the operation of the air conditioner.

[0008] It is understandable that when the drain pump malfunctions or stops running, there is a risk that condensate may enter the motor assembly along the shaft. If condensate enters the motor assembly, it will reduce the reliability and lifespan of the motor assembly.

[0009] The water baffle is fitted onto the outer circumferential wall of the rotating shaft, and at least part of the water baffle is located at the waterproof hole. Since the water baffle extends radially and is sealed to the rotating shaft, it can effectively prevent condensate from entering the motor assembly along the rotating shaft, thus avoiding corrosion or even burnout of the motor assembly due to water ingress. This improves the reliability of the drainage pump and helps extend its service life.

[0010] In some technical solutions, the water-blocking component may optionally have a mounting hole for fitting with the rotating shaft, the inner diameter of which is smaller than the outer diameter of the rotating shaft.

[0011] In this technical solution, the water-blocking component includes a mounting hole, and the water-blocking component is fitted onto the outer peripheral wall of the rotating shaft through the mounting hole. Since the inner diameter of the mounting hole is smaller than the outer diameter of the rotating shaft, a certain pressure needs to be applied to the water-blocking component during installation to ensure that it fits tightly against the rotating shaft. That is, the inner wall of the water-blocking component and the outer peripheral wall of the rotating shaft are interference-fitted, thereby achieving a sealed connection between the water-blocking component and the rotating shaft. When the drainage pump malfunctions or stops, it can effectively prevent condensate from entering the motor assembly along the rotating shaft, avoiding damage to the motor assembly due to water ingress, and thus improving the reliability of the drainage pump.

[0012] In some technical solutions, optionally, the water-blocking component has a mounting hole for fitting with the rotating shaft. The wall of the mounting hole is provided with multiple ribs, which are arranged along the axial direction of the rotating shaft and abut against the rotating shaft respectively.

[0013] In this technical solution, the water-blocking component includes a mounting hole, and the water-blocking component is fitted onto the outer peripheral wall of the rotating shaft through the mounting hole. The wall of the mounting hole is provided with multiple ribs, specifically, the multiple ribs are arranged along the axial direction of the rotating shaft, that is, multiple ribs are provided on the inner wall of the water-blocking component. Since the multiple ribs abut against the rotating shaft, the contact area and friction between the water-blocking component and the rotating shaft can be increased, thereby improving the firmness of the fixation between the rotating shaft and the water-blocking component, and thus improving the sealing effect between the rotating shaft and the water-blocking component.

[0014] In some technical solutions, optionally, at least one rib is constructed as a ring rib.

[0015] In this technical solution, since at least one rib is an annular rib, that is, the entire circumference of the rotating shaft abuts and seals with the water baffle, it is beneficial to further improve the sealing effect between the rotating shaft and the water baffle. When the drainage pump malfunctions or stops, it can effectively prevent condensate from entering the motor assembly along the rotating shaft, avoid damage to the motor assembly due to water ingress, and improve the reliability of the drainage pump.

[0016] In some technical solutions, optionally, a gap exists between the outer peripheral wall of the water-blocking component and the wall of the waterproof hole along the radial direction of the rotating shaft.

[0017] In this technical solution, since the water-blocking component is sealed to the rotating shaft, when the rotating shaft drives the impeller to rotate, the rotating shaft will also cause the water-blocking component to rotate relative to the motor assembly. By maintaining a certain gap between the outer peripheral wall of the water-blocking component and the wall of the waterproof hole, it is possible to prevent the water-blocking component from scraping against the motor assembly during rotation, reducing wear on both the water-blocking component and the motor assembly. This ensures that the water-blocking component can effectively prevent condensate from entering the motor assembly, while also extending the service life of the water-blocking component.

[0018] In some technical solutions, optionally, the width of the gap W along the radial direction of the shaft satisfies W≤0.5mm.

[0019] In this technical solution, the radial width of the gap is limited to less than or equal to 0.5mm. That is, the gap between the outer peripheral wall of the water-blocking component and the wall of the waterproof hole is set to be small, i.e., the gap is a slit. When the drainage pump malfunctions or stops, and condensate comes into contact with the slit, atmospheric pressure and the surface tension of the water itself can form a seal between the outer peripheral wall of the water-blocking component and the wall of the waterproof hole. This effectively prevents condensate from entering the motor assembly through the gap between the water-blocking component and the wall of the waterproof hole, further blocking the condensate and reducing the possibility of water intrusion into the motor assembly. This completely avoids condensate intrusion into the motor assembly, further preventing the motor assembly from being corroded or burned out, and improving the reliability of the drainage pump.

[0020] In some technical solutions, optionally, the side of the motor assembly facing the impeller includes an outer bottom wall, and a waterproof hole is provided on the outer bottom wall; wherein, the side of the water-blocking component facing the impeller is flush with the outer bottom wall.

[0021] In this technical solution, the side of the motor assembly facing the impeller includes an outer bottom wall. Specifically, a waterproof hole is located on the outer bottom wall. Since the side of the water-blocking component facing the impeller is flush with the outer bottom wall, that is, the bottom surface of the water-blocking component is flush with the lower edge of the motor assembly, the installation position of the water-blocking component is designed so that water is blocked as soon as it comes into contact with the water-blocking component and the lower edge of the motor assembly, preventing the water from rising further, improving the water-blocking effect of the water-blocking component, further preventing condensate from entering the motor assembly, preventing the motor assembly from being corroded or burned out, and further improving the reliability of the drainage pump.

[0022] In some technical solutions, optionally, the outer peripheral wall of the water-blocking component includes multiple arc-shaped surfaces arranged along the axis of rotation. The multiple arc-shaped surfaces include at least an adjacent first arc-shaped surface and a second arc-shaped surface. The first arc-shaped surface is recessed on the side where the axis of rotation is located, and the second arc-shaped surface protrudes on the side away from the axis of rotation.

[0023] In this technical solution, the outer peripheral wall of the water-blocking component is defined to include multiple arc-shaped surfaces arranged along the axis of rotation. Specifically, the multiple arc-shaped surfaces include at least an adjacent first arc-shaped surface and a second arc-shaped surface. The first arc-shaped surface is concave on the side where the axis of rotation is located, and the second arc-shaped surface is convex on the side away from the axis of rotation. In other words, the outer edge of the water-blocking component is wavy, which can increase the effective area of ​​the water-blocking component and at the same time reduce the surface tension effect of water, thereby further improving the waterproof effect.

[0024] In some technical solutions, optionally, the water-blocking component includes a first water-blocking part and a second water-blocking part. Along the radial direction of the rotating shaft, the first water-blocking part is located between the rotating shaft and the second water-blocking part, and the first water-blocking part is sealed to the rotating shaft; wherein, the hardness of the first water-blocking part is greater than the hardness of the second water-blocking part.

[0025] In this technical solution, the water-blocking component is defined to include a first water-blocking part and a second water-blocking part. Specifically, along the radial direction of the rotating shaft, the first water-blocking part is located between the rotating shaft and the second water-blocking part, that is, the first water-blocking part is located radially inside the second water-blocking part.

[0026] Since the hardness of the first water-blocking part is greater than that of the second water-blocking part, meaning that the first water-blocking part, which is sealed to the rotating shaft, has a higher hardness, it provides good support and positioning functions. Meanwhile, the second water-blocking part, which maintains a certain gap with the wall of the waterproof hole, has a lower hardness. Therefore, the gap between the water-blocking part and the wall of the waterproof hole can be further reduced, improving the sealing effect between the water-blocking part and the wall of the waterproof hole. This helps to completely prevent condensate from entering the motor assembly, further avoiding corrosion or burnout of the motor assembly and improving the reliability of the drainage pump.

[0027] In some technical solutions, optionally, along the axial direction of the rotating shaft, the water-blocking member includes a first end and a second end facing away from each other, the first end being farther away from the impeller than the second end; wherein, along the radial direction of the rotating shaft, the width of the first end is greater than the width of the second end.

[0028] In this technical solution, the water-blocking component is defined to include a first end and a second end that are opposite to each other along the axis of rotation. Specifically, the first end is farther away from the impeller than the second end, that is, the first end is the top end and the second end is the bottom end.

[0029] Because the radial width at the top is greater than that at the bottom, meaning that the outer edge of the water baffle is an inclined conical structure, it can prevent condensate from entering the motor assembly along the shaft, while also guiding the water flow that comes into contact with the water baffle downwards, reducing the possibility of water flowing upwards, and further preventing water from intruding into the motor assembly.

[0030] In some technical solutions, the water-blocking component may optionally include a first water-blocking portion and a second water-blocking portion, which are arranged along the axial direction of the rotating shaft. The first water-blocking portion is farther away from the impeller than the second water-blocking portion. The first water-blocking portion extends radially along the rotating shaft, and along the radial direction of the rotating shaft, the width of the side of the second water-blocking portion closer to the first water-blocking portion is greater than the width of the side of the second water-blocking portion farther away from the first water-blocking portion.

[0031] In this technical solution, the water-blocking component is defined as including a first water-blocking part and a second water-blocking part. Specifically, the first water-blocking part and the second water-blocking part are arranged along the axial direction of the rotating shaft, and the first water-blocking part is farther away from the impeller than the second water-blocking part. That is to say, the first water-blocking part is located at the top layer and the second water-blocking part is located at the bottom layer.

[0032] Because the first water-blocking part extends radially and the upper width of the second water-blocking part is greater than the lower width of the second water-blocking part, that is, the first water-blocking part at the top extends horizontally and the outer edge of the second water-blocking part at the bottom is an inclined conical structure, the water-blocking part is formed in a shape similar to an "umbrella". This prevents water from entering the motor assembly when the drainage pump stops or malfunctions, avoiding corrosion or even burnout of the motor assembly due to water ingress. This improves the reliability of the drainage pump and guides the water away from the shaft, reducing the possibility of water flowing upward and further preventing water from entering the motor assembly.

[0033] In some technical solutions, the water-blocking component may optionally include an elastic component; and / or the water-blocking component may include a waterproof component.

[0034] In this technical solution, because the water-blocking component is an elastic element, meaning it possesses a certain degree of elasticity, it allows for a tighter fit against the rotating shaft. This improves the sealing performance between the water-blocking component and the shaft, resulting in better waterproofing. Furthermore, the elasticity of the water-blocking component further reduces the gap between it and the wall of the waterproofing hole, further enhancing the sealing effect. This effectively prevents condensate from entering the motor assembly, further avoiding corrosion or burnout of the motor assembly and improving the reliability of the drainage pump.

[0035] The water baffle is a waterproof component, meaning it has excellent water resistance. While preventing condensate from entering the motor assembly, it also helps extend the service life of the water baffle.

[0036] In some technical solutions, the water-blocking element is optionally constructed as an annular water-blocking element.

[0037] In this technical solution, since the water-blocking component is an annular water-blocking component, that is, it blocks the condensate on the outer circumference of the rotating shaft, it is beneficial to improve the water-blocking effect, prevent the condensate from entering the motor assembly along the rotating shaft, improve the reliability of the drainage pump, and extend the service life of the drainage pump.

[0038] In addition, the annular water baffle has a simple structure and is easy to process and manufacture, which helps to reduce the production cost of drainage pumps.

[0039] In some technical solutions, the motor assembly optionally includes a motor and a bearing component, wherein the motor, the bearing component and the impeller are arranged axially along the shaft, and the bearing component is located between the motor and the impeller. The bearing component has a waterproof hole on the side facing the impeller, and one end of the shaft passes through the waterproof hole through the bearing component.

[0040] In this technical solution, the motor assembly is defined to include a motor and a bearing component. Specifically, the motor, bearing component and impeller are arranged along the axial direction of the rotating shaft, and the bearing component is located between the motor and the impeller. By setting the bearing component, the rotating shaft can be supported.

[0041] The bearing component has a waterproof hole on the side facing the impeller. Optionally, the bearing component includes a housing and a bearing, with the bearing located inside the housing and the waterproof hole located on the housing.

[0042] According to a second aspect of the present invention, an air conditioner is provided, which includes a drain pump as provided in any of the above technical solutions, and thus possesses all the beneficial technical effects of the drain pump, which will not be repeated here.

[0043] Additional aspects and advantages of the present invention will be set forth in the description which follows, in part will be obvious from the description, or may be learned by practice of the present invention. Attached Figure Description

[0044] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0045] Figure 1 A schematic diagram of a drainage pump according to an embodiment of the present invention is shown;

[0046] Figure 2 It shows Figure 1 An enlarged view of the drainage pump at point A in the illustrated embodiment;

[0047] Figure 3 A partial structural schematic diagram of a drainage pump according to an embodiment of the present invention is shown;

[0048] Figure 4 A schematic diagram of the structure of a water-blocking component according to an embodiment of the present invention is shown;

[0049] Figure 5 A schematic diagram of the structure of a water-blocking component according to another embodiment of the present invention is shown;

[0050] Figure 6 A schematic diagram of the structure of a water-blocking component according to another embodiment of the present invention is shown;

[0051] Figure 7 A schematic diagram of the structure of a water-blocking component according to another embodiment of the present invention is shown.

[0052] in, Figures 1 to 7 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0053] 100 Drain pump, 110 Pump body, 111 Pump chamber, 112 Inlet channel, 113 Drain channel, 120 Impeller, 130 Motor assembly, 131 Waterproof hole, 132 Motor, 133 Bearing component, 134 Outer bottom wall, 140 Rotary shaft, 150 Water baffle, 151 Rib, 152 Arc surface, 153 First arc surface, 154 Second arc surface, 155 First water baffle, 156 Second water baffle, 157 First end, 158 Second end, 159 Mounting hole, 160 Clearance. Detailed Implementation

[0054] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0055] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0056] The following reference Figures 1 to 7 This invention describes a drain pump 100 and an air conditioner provided according to some embodiments of the present invention.

[0057] In one embodiment according to this application, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, a drainage pump 100 is proposed, comprising: a pump body 110, the pump body 110 having a pump chamber 111, a water inlet channel 112 and a drainage channel 113, the water inlet channel 112 and the drainage channel 113 respectively communicating with the pump chamber 111; an impeller 120 disposed in the pump chamber 111; a motor assembly 130 disposed in the pump body 110, the motor assembly 130 having a waterproof hole 131 on the side facing the impeller 120; a rotating shaft 140, one end of the rotating shaft 140 passing through the waterproof hole 131 and connected to the motor assembly 130, the other end of the rotating shaft 140 being connected to the impeller 120; and a water baffle 150 fitted onto the outer peripheral wall of the rotating shaft 140 and at least partially located at the waterproof hole 131, the water baffle 150 being sealed to the rotating shaft 140 and extending radially along the rotating shaft 140.

[0058] The drain pump 100 provided in this embodiment includes a pump body 110, an impeller 120, a motor assembly 130, a rotating shaft 140, and a water baffle 150. Specifically, the pump body 110 is provided with a pump chamber 111, a water inlet channel 112, and a drain channel 113, and the pump chamber 111 is connected to either the water inlet channel 112 or the drain channel 113. It is understood that the water inlet channel 112 is connected to the air conditioner's drip tray, which is used to collect condensate. Specifically, during the operation of the drain pump 100, the motor assembly 130 drives the rotating shaft 140 to rotate, and the rotating shaft 140 drives the impeller 120 to rotate within the pump chamber 111, thereby discharging the condensate generated during the operation of the air conditioner.

[0059] It is understandable that when the drain pump 100 malfunctions or stops running, there is a risk that condensate will enter the motor assembly 130 through the shaft 140. If condensate enters the motor assembly 130, it will reduce the reliability and service life of the motor assembly 130.

[0060] The water baffle 150 is fitted onto the outer peripheral wall of the rotating shaft 140, and at least part of the water baffle 150 is located at the waterproof hole 131. Since the water baffle 150 extends radially and is sealed to the rotating shaft 140, it can effectively prevent condensate from entering the motor assembly 130 along the rotating shaft 140, thus avoiding corrosion or even burnout of the motor assembly 130 due to water ingress. This improves the reliability of the drain pump 100 and helps extend its service life.

[0061] Optionally, the water-blocking component 150 and the rotating shaft 140 are interference-fitted. Alternatively, the water-blocking component 150 and the rotating shaft 140 are sealed together by an adhesive component. Alternatively, the water-blocking component 150 and the rotating shaft 140 are threaded together. The specific configuration can be adjusted according to actual needs.

[0062] like Figure 2 and Figure 3As shown, in some embodiments, optionally, the water-blocking member 150 has a mounting hole 159 that fits with the rotating shaft 140, the inner diameter of the mounting hole 159 being smaller than the outer diameter of the rotating shaft 140.

[0063] In this embodiment, the water-blocking component 150 includes a mounting hole 159, and the water-blocking component 150 is fitted onto the outer peripheral wall of the rotating shaft 140 through the mounting hole 159. Since the inner diameter of the mounting hole 159 is smaller than the outer diameter of the rotating shaft 140, a certain pressure needs to be applied to the water-blocking component 150 during installation to make it fit tightly against the rotating shaft 140. That is, the inner wall of the water-blocking component 150 and the outer peripheral wall of the rotating shaft 140 are interference-fitted, thereby achieving a sealed connection between the water-blocking component 150 and the rotating shaft 140. When the drain pump 100 malfunctions or stops, it can effectively prevent condensate from entering the motor assembly 130 along the rotating shaft 140, avoiding damage to the motor assembly 130 due to water ingress, which is beneficial to improving the reliability of the drain pump 100.

[0064] It is understandable that, since the water-blocking component 150 extends radially, that is, the outer diameter of the water-blocking component 150 is larger than the outer diameter of the rotating shaft 140.

[0065] like Figure 5 As shown, in some embodiments, optionally, the water-blocking member 150 has a mounting hole 159 that is fitted with the rotating shaft 140. The wall of the mounting hole 159 is provided with a plurality of ribs 151, which are arranged along the axial direction of the rotating shaft 140 and abut against the rotating shaft 140 respectively.

[0066] In this embodiment, the water-blocking component 150 includes a mounting hole 159, and the water-blocking component 150 is fitted onto the outer peripheral wall of the rotating shaft 140 through the mounting hole 159. The wall of the mounting hole 159 is provided with multiple ribs 151. Specifically, the multiple ribs 151 are arranged along the axial direction of the rotating shaft 140, that is, multiple ribs 151 are provided on the inner wall of the water-blocking component 150. Since the multiple ribs 151 abut against the rotating shaft 140, the contact area and friction between the water-blocking component 150 and the rotating shaft 140 can be increased, thereby improving the firmness of the fixation between the rotating shaft 140 and the water-blocking component 150, and thus improving the sealing effect between the rotating shaft 140 and the water-blocking component 150.

[0067] In some embodiments, at least one rib 151 may be configured as a ring rib.

[0068] In this embodiment, since at least one rib 151 is an annular rib, that is, a full circle around the outer periphery of the rotating shaft 140 abuts and seals with the water baffle 150, it is beneficial to further improve the sealing effect between the rotating shaft 140 and the water baffle 150. When the drain pump 100 malfunctions or stops, it can effectively prevent condensate from entering the motor assembly 130 along the rotating shaft 140, avoiding damage to the motor assembly 130 due to water ingress, and thus improving the reliability of the drain pump 100.

[0069] like Figure 2 As shown, in some embodiments, optionally, a gap 160 is formed between the outer peripheral wall of the water-blocking member 150 and the wall of the waterproof hole 131 along the radial direction of the pivot 140.

[0070] In this embodiment, since the water-blocking component 150 is sealed to the rotating shaft 140, when the rotating shaft 140 drives the impeller 120 to rotate, the rotating shaft 140 will also drive the water-blocking component 150 to rotate relative to the motor assembly 130. By maintaining a certain gap 160 between the outer peripheral wall of the water-blocking component 150 and the wall of the waterproof hole 131, it is possible to prevent the water-blocking component 150 from scraping against the motor assembly 130 during rotation, thereby reducing wear on both the water-blocking component 150 and the motor assembly 130. This ensures that the water-blocking component 150 can effectively prevent condensate from entering the interior of the motor assembly 130, while also extending the service life of the water-blocking component 150.

[0071] like Figure 2 As shown, in some embodiments, optionally, the width of the gap W along the radial direction of the shaft 140 satisfies W≤0.5mm.

[0072] In this embodiment, the radial width of the gap 160 is limited to less than or equal to 0.5 mm. That is, the gap 160 between the outer peripheral wall of the water-blocking member 150 and the wall of the waterproof hole 131 is set to be small, i.e., the gap 160 is a slit. When the drainage pump 100 malfunctions or stops, and condensate comes into contact with the slit, atmospheric pressure and the tension of the water itself can form a seal between the outer peripheral wall of the water-blocking member 150 and the wall of the waterproof hole 131. This effectively prevents condensate from entering the motor assembly 130 through the gap 160 between the water-blocking member 150 and the wall of the waterproof hole 131, further blocking the condensate and reducing the possibility of water intrusion into the motor assembly 130. This can completely avoid the intrusion of condensate into the motor assembly 130, further preventing the motor assembly 130 from being corroded or burned, and improving the reliability of the drainage pump 100.

[0073] Optionally, the radial width of the gap 160 is any one of 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm and 0.5 mm.

[0074] like Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, optionally, the side of the motor assembly 130 facing the impeller 120 includes an outer bottom wall 134, and a waterproof hole 131 is provided on the outer bottom wall 134; wherein, the side of the water baffle 150 facing the impeller 120 is flush with the outer bottom wall 134.

[0075] In this embodiment, the side of the motor assembly 130 facing the impeller 120 includes an outer bottom wall 134. Specifically, a waterproof hole 131 is provided on the outer bottom wall 134. Since the side of the water baffle 150 facing the impeller 120 is flush with the outer bottom wall 134, that is, the bottom surface of the water baffle 150 is flush with the lower edge of the motor assembly 130, the installation position of the water baffle 150 is designed so that when water just comes into contact with the water baffle 150 and the lower edge of the motor assembly 130, it is blocked, preventing the water from rising further, improving the water baffle 150's water-blocking effect, further preventing condensate from entering the motor assembly 130, preventing the motor assembly 130 from being corroded or burned, and further improving the reliability of the drainage pump 100.

[0076] like Figure 4 As shown, in some embodiments, optionally, the outer peripheral wall of the water-blocking member 150 includes a plurality of arcuate surfaces 152 arranged along the axial direction of the rotating shaft 140. The plurality of arcuate surfaces 152 include at least an adjacent first arcuate surface 153 and a second arcuate surface 154. The first arcuate surface 153 is recessed toward the side where the rotating shaft 140 is located, and the second arcuate surface 154 protrudes toward the side away from the rotating shaft 140.

[0077] In this embodiment, the outer peripheral wall of the water-blocking member 150 is defined to include a plurality of arc-shaped surfaces 152 arranged along the axial direction of the rotating shaft 140. Specifically, the plurality of arc-shaped surfaces 152 include at least an adjacent first arc-shaped surface 153 and a second arc-shaped surface 154. The first arc-shaped surface 153 is recessed toward the side where the rotating shaft 140 is located, and the second arc-shaped surface 154 protrudes toward the side away from the rotating shaft 140. In other words, the outer edge of the water-blocking member 150 is wavy, which can increase the effective area of ​​the water-blocking member 150 and at the same time reduce the surface tension effect of water, further improving the waterproof effect.

[0078] like Figure 4 As shown, in some embodiments, optionally, the water-blocking member 150 includes a first water-blocking portion 155 and a second water-blocking portion 156. Along the radial direction of the rotating shaft 140, the first water-blocking portion 155 is located between the rotating shaft 140 and the second water-blocking portion 156, and the first water-blocking portion 155 is sealed to the rotating shaft 140; wherein, the hardness of the first water-blocking portion 155 is greater than the hardness of the second water-blocking portion 156.

[0079] In this embodiment, the water-blocking member 150 is defined to include a first water-blocking portion 155 and a second water-blocking portion 156. Specifically, along the radial direction of the rotating shaft 140, the first water-blocking portion 155 is located between the rotating shaft 140 and the second water-blocking portion 156, that is, the first water-blocking portion 155 is located radially inside the second water-blocking portion 156.

[0080] Since the hardness of the first water-blocking part 155 is greater than that of the second water-blocking part 156, that is, the first water-blocking part 155, which is sealed to the rotating shaft 140, has a higher hardness, thus providing good support and positioning functions. On the other hand, the second water-blocking part 156, which maintains a certain gap 160 between itself and the wall of the waterproof hole 131, has a lower hardness. Therefore, the gap 160 between the water-blocking part 150 and the wall of the waterproof hole 131 can be further reduced, improving the sealing effect between the water-blocking part 150 and the wall of the waterproof hole 131. This is beneficial for completely preventing condensate from entering the motor assembly 130, further avoiding the motor assembly 130 from being corroded or burned, and improving the reliability of the drain pump 100.

[0081] Optionally, the first water-blocking part 155 is a rigid engineering plastic part, and the second water-blocking part 156 is a rubber part.

[0082] like Figure 6 As shown, in some embodiments, optionally, along the axial direction of the rotating shaft 140, the water baffle 150 includes a first end 157 and a second end 158 facing away from each other, the first end 157 being farther away from the impeller 120 than the second end 158; wherein, along the radial direction of the rotating shaft 140, the width of the first end 157 is greater than the width of the second end 158.

[0083] In this embodiment, the water baffle 150 is defined to include a first end 157 and a second end 158 that are axially opposite to each other along the rotating shaft 140. Specifically, the first end 157 is farther away from the impeller 120 than the second end 158. That is, the first end 157 is the top end and the second end 158 is the bottom end.

[0084] Since the radial width at the top is greater than that at the bottom, meaning that the outer edge of the water baffle 150 is an inclined conical structure, it can prevent condensate from entering the motor assembly 130 along the rotating shaft 140, while also guiding the water flow that comes into contact with the water baffle 150 downwards, reducing the possibility of water flowing upwards, and further preventing water from intruding into the motor assembly 130.

[0085] like Figure 5As shown, in some embodiments, optionally, the water-blocking member 150 includes a first water-blocking portion 155 and a second water-blocking portion 156, the first water-blocking portion 155 and the second water-blocking portion 156 are arranged along the axial direction of the rotating shaft 140, the first water-blocking portion 155 is farther away from the impeller 120 than the second water-blocking portion 156; wherein, the first water-blocking portion 155 extends radially along the rotating shaft 140, and along the radial direction of the rotating shaft 140, the width of the side of the second water-blocking portion 156 close to the first water-blocking portion 155 is greater than the width of the side of the second water-blocking portion 156 away from the first water-blocking portion 155.

[0086] In this embodiment, the water-blocking member 150 is defined to include a first water-blocking part 155 and a second water-blocking part 156. Specifically, the first water-blocking part 155 and the second water-blocking part 156 are arranged along the axial direction of the rotating shaft 140, and the first water-blocking part 155 is farther away from the impeller 120 than the second water-blocking part 156. That is, the first water-blocking part 155 is located at the top layer and the second water-blocking part 156 is located at the bottom layer.

[0087] Since the first water-blocking part 155 extends radially and the upper width of the second water-blocking part 156 is greater than the lower width of the second water-blocking part 156, that is, the first water-blocking part 155 at the top extends horizontally and the outer edge of the second water-blocking part 156 at the bottom is an inclined conical structure, the water-blocking part 150 is formed into a shape similar to an "umbrella". In this way, when the drainage pump 100 stops or works abnormally, it blocks water from entering the motor assembly 130, avoiding corrosion or even burnout of the motor assembly 130 due to water ingress. This improves the reliability of the drainage pump 100 and guides the water away from the rotating shaft 140, reducing the possibility of water flowing upward and further preventing water from intruding into the motor assembly 130.

[0088] In some embodiments, the water-blocking member 150 may optionally include an elastic member; and / or the water-blocking member 150 may include a waterproof member.

[0089] In this embodiment, since the water-blocking component 150 is an elastic component, meaning it has a certain degree of elasticity, it can fit more tightly against the rotating shaft 140. This improves the sealing performance between the water-blocking component 150 and the rotating shaft 140, resulting in better waterproofing. Furthermore, because the water-blocking component 150 has a certain degree of elasticity, the gap 160 between the water-blocking component 150 and the wall of the waterproof hole 131 can be further reduced, further improving the sealing effect between them. This helps to completely prevent condensate from entering the motor assembly 130, further avoiding corrosion or burnout of the motor assembly 130 and improving the reliability of the drain pump 100.

[0090] The water-blocking component 150 is a waterproof component, meaning that the water-blocking component 150 has good water resistance. While preventing condensate from entering the motor assembly 130, it also helps to extend the service life of the water-blocking component 150.

[0091] Optionally, the water-blocking component 150 may include silicone, rubber, or special engineering plastic components.

[0092] like Figure 7 As shown, in some embodiments, the water-blocking member 150 is optionally configured as an annular water-blocking member.

[0093] In this embodiment, since the water-blocking component 150 is an annular water-blocking component, that is, it blocks the condensate on the outer periphery of the rotating shaft 140, it is beneficial to improve the water-blocking effect, prevent the condensate from entering the motor assembly 130 along the rotating shaft 140, improve the reliability of the drain pump 100, and extend the service life of the drain pump 100.

[0094] In addition, the annular water baffle has a simple structure and is easy to process and manufacture, which helps to reduce the production cost of the drainage pump 100.

[0095] like Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, optionally, the motor assembly 130 includes a motor 132 and a bearing component 133, wherein the motor 132, the bearing component 133 and the impeller 120 are arranged along the axial direction of the shaft 140, and the bearing component 133 is located between the motor 132 and the impeller 120. The bearing component 133 is provided with a waterproof hole 131 on the side facing the impeller 120, and one end of the shaft 140 passes through the bearing component 133 through the waterproof hole 131.

[0096] In this embodiment, the motor assembly 130 is defined to include a motor 132 and a bearing component 133. Specifically, the motor 132, the bearing component 133 and the impeller 120 are arranged along the axial direction of the shaft 140, and the bearing component 133 is located between the motor 132 and the impeller 120. By providing the bearing component 133, the shaft 140 can be supported.

[0097] The bearing component 133 is provided with a waterproof hole 131 on the side facing the impeller 120. Optionally, the bearing component 133 includes a housing and a bearing, the bearing is disposed inside the housing, the outer wall of the housing includes an outer bottom wall 134, and the waterproof hole 131 is disposed on the outer bottom wall 134.

[0098] Example 1

[0099] like Figure 1 , Figure 2 , Figure 3 and Figure 7As shown, this embodiment provides a solution for preventing water from entering the drain pump motor (motor assembly 130) of an air conditioner drain pump (drain pump 100). Air conditioners generate a large amount of condensate during operation, which needs to be discharged through the drain pump 100. However, in the drain pump structures of related technologies, water easily enters the motor along the motor shaft, severely affecting the service life of the drain pump and the normal operation of the air conditioner.

[0100] To address the aforementioned issues, this embodiment proposes installing an annular water-blocking ring (water-blocking component 150) on the motor shaft (rotating shaft 140) of the drainage pump 100. This water-blocking ring is made of water-resistant and corrosion-resistant material, effectively preventing water from flowing along the motor shaft (rotating shaft 140) into the motor (motor assembly 130).

[0101] Specifically, the air conditioning drain pump (drain pump 100) includes a pump body 110, a motor cavity, a motor shaft (rotating shaft 140), and an annular water baffle (water baffle 150). The pump body 110 is used to contain and guide condensate. A drive motor (motor 132) is installed in the motor cavity, and the motor shaft (rotating shaft 140) is connected to the drive motor to drive the impeller 120 to rotate and discharge condensate. A bearing chamber (bearing component 133) is provided at the lower part of the motor cavity for installing the bearing that supports the motor shaft.

[0102] The core of this embodiment lies in the installation of an annular water-blocking ring (water-blocking component 150) on the motor shaft (rotating shaft 140). This water-blocking ring is mounted on the motor shaft, located below the bearing, and is used to prevent water from flowing upwards along the motor shaft (rotating shaft 140) and entering the motor interior. The water-blocking ring is annular in shape, with its inner diameter slightly smaller than the outer diameter of the motor shaft (rotating shaft 140), and its outer diameter larger than the outer diameter of the motor shaft, forming an outwardly extending water-blocking structure.

[0103] The water-retaining ring (water-retaining component 150) and the motor shaft (rotating shaft 140) are fixed by an interference fit. An interference fit means that the inner diameter of the water-retaining ring is slightly smaller than the outer diameter of the motor shaft. During installation, a certain amount of pressure needs to be applied to the water-retaining ring to ensure it fits tightly against the motor shaft. This fixing method ensures that there are no gaps between the water-retaining ring and the motor shaft, effectively preventing water from seeping in through any gaps.

[0104] The placement of the water baffle ring (water baffle 150) is also crucial; it is installed flush with the lower edge of the bearing housing in the motor cavity. This placement allows the water baffle ring to block water before it even touches the bearing housing, preventing further water rise.

[0105] During assembly, the single-sided gap 160 between the lower edge of the motor cavity bearing housing and the water-blocking ring (water-blocking component 150) is controlled to be no more than 0.5mm. This precise gap control further improves the waterproof effect, because the smaller gap 160 can effectively reduce the possibility of water passing through, while not affecting the normal rotation of the motor shaft.

[0106] The choice of material for the water-retaining ring (water-retaining component 150) is also important. Water-resistant and corrosion-resistant materials are typically used, such as rubber, silicone, or special engineering plastics. These materials have good elasticity and sealing properties, maintaining good waterproofing performance over long-term use.

[0107] Optionally, when the air conditioner produces condensate, the condensate is collected in the pump body 110 of the drain pump 100. After the drain pump 100 starts, the motor 132 drives the impeller 120 to rotate, discharging the water. During this process, some water may flow upward along the motor shaft (rotating shaft 140), but when the water encounters the baffle ring (water baffle 150), because the baffle ring is tightly fitted to the motor shaft and the gap 160 between the baffle ring and the lower edge of the bearing housing is very small, the water cannot continue to flow upward, thus protecting the motor 132 from water intrusion.

[0108] The waterproof solution for the air conditioning drain pump (drain pump 100) in this embodiment has advantages such as simple structure, convenient installation, and good waterproof effect. By setting an annular water-blocking ring (water-blocking component 150) on the motor shaft (rotating shaft 140) and using an interference fit, while controlling the position and gap of the water-blocking ring, the problem of water easily entering the drain pump in related technologies is effectively solved, the service life of the drain pump 100 is extended, and the reliability of the air conditioning system is improved.

[0109] Example 2

[0110] like Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, this embodiment provides an improved solution for preventing water from entering the drain pump motor (motor assembly 130) of an air conditioning drain pump (drain pump 100). Compared with Embodiment 1, this embodiment changes the material selection and structural design of the water-blocking ring (water-blocking component 150).

[0111] In this embodiment, a circular water-blocking ring (water-blocking component 150) is also provided on the motor shaft (rotating shaft 140) of the drainage pump 100. This water-blocking ring is made of silicone material, which has better elasticity and sealing performance, can fit more tightly to the motor shaft, and provides better waterproofing.

[0112] The water baffle ring (water baffle 150) and the motor shaft (rotating shaft 140) are also fixed by interference fit to ensure a tight fit between the water baffle ring and the motor shaft.

[0113] The water-blocking ring (water-blocking component 150) is positioned flush with the lower edge of the motor cavity bearing chamber (bearing component 133), which is the same as in Embodiment 1. However, in this embodiment, the outer edge of the water-blocking ring is designed as a downwardly sloping conical structure. This design can more effectively guide the water flow downward and reduce the possibility of water flowing upward.

[0114] During assembly, the single-sided gap 160 between the lower edge of the motor cavity bearing housing and the water baffle ring is controlled at 0.3mm. This gap is smaller than the upper limit value in Embodiment 1, providing better waterproofing. At the same time, this gap 160 is also large enough to prevent friction between the water baffle ring (water baffle 150) and the lower edge of the bearing housing (bearing component 133) due to thermal expansion and contraction or vibration.

[0115] The waterproofing solution for the air conditioner drain pump (drain pump 100) in this embodiment further improves the waterproofing effect by changing the material, structure and installation parameters of the water-blocking ring (water-blocking component 150), while maintaining the characteristics of simple structure and convenient installation.

[0116] Example 3

[0117] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, this embodiment provides another improved solution for preventing water from entering the drain pump motor (motor assembly 130) of an air conditioning drain pump (drain pump 100). Compared with the previous two embodiments, this embodiment changes the shape and installation method of the water baffle ring (water baffle 150).

[0118] In this embodiment, a circular water-retaining ring (water-retaining component 150) is also provided on the motor shaft (rotating shaft 140) of the drainage pump 100. The water-retaining ring is made of special engineering plastic and has good water resistance, corrosion resistance and mechanical strength.

[0119] The water baffle ring (water baffle 150) and the motor shaft (rotating shaft 140) are also fixed by interference fit. To enhance the fixing effect, the inner wall of the water baffle ring is designed with multiple annular protrusions (ribs 151). These protrusions can increase the contact area and friction with the motor shaft, and improve the fixing firmness.

[0120] The water-blocking ring (water-blocking component 150) is positioned flush with the lower edge of the motor cavity bearing chamber (bearing component 133), as in the previous two embodiments. However, in this embodiment, the outer edge of the water-blocking ring is designed with a double-layer structure. The upper layer (first water-blocking part 155) extends horizontally, while the lower layer (second water-blocking part 156) slopes downward, forming a shape similar to an "umbrella." This design not only prevents water from flowing upward but also guides the water away from the motor shaft (rotating shaft 140).

[0121] During assembly, the single-sided gap 160 between the lower edge of the motor cavity bearing chamber (bearing component 133) and the water baffle ring (water baffle 150) is controlled at 0.4mm. This gap 160 ensures waterproofing while also taking into account the convenience of assembly and the normal operation of the motor shaft (rotating shaft 140).

[0122] The waterproofing solution for the air conditioner drain pump (drain pump 100) in this embodiment improves the waterproofing effect by changing the shape and structure of the water-blocking ring (water-blocking component 150), while maintaining the characteristics of simple structure and convenient installation.

[0123] Example 4

[0124] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this embodiment provides another solution for preventing water from entering the drain pump motor (motor assembly 130) of an air conditioning drain pump (drain pump 100). Compared with the previous three embodiments, this embodiment changes the material combination and installation precision of the water-blocking ring (water-blocking component 150).

[0125] In this embodiment, a circular water-retaining ring (water-retaining component 150) is also provided on the motor shaft (rotating shaft 140) of the drainage pump 100. This water-retaining ring adopts a dual-material structure: the inner layer (first water-retaining part 155) is made of rigid engineering plastic, providing good support and positioning; the outer layer (second water-retaining part 156) is made of soft rubber, providing excellent sealing performance. This dual-material structure combines the advantages of both materials, providing both good rigid support and excellent sealing effect.

[0126] The water-blocking ring (water-blocking component 150) and the motor shaft (rotating shaft 140) are also fixed by interference fit. The inner layer (first water-blocking part 155) of hard plastic ensures the stable positioning of the water-blocking ring (water-blocking component 150) on the motor shaft (rotating shaft 140), while the outer layer (second water-blocking part 156) of soft rubber provides a better sealing effect.

[0127] The water-retaining ring (water-retaining component 150) is positioned flush with the lower edge of the motor cavity bearing chamber (bearing component 133), which is the same as in the previous three embodiments. However, in this embodiment, the outer edge of the water-retaining ring is designed in a wavy shape. This design increases the effective area of ​​the water-retaining ring and also reduces the surface tension effect of water, further improving the waterproof effect.

[0128] During assembly, the single-sided gap 160 between the lower edge of the motor cavity bearing housing (bearing component 133) and the water-retaining ring (water-retaining component 150) is controlled at 0.2mm. This smaller gap 160 provides better waterproofing. To ensure this precise gap 160, specialized assembly tools and testing equipment can be used during assembly to ensure that the gap 160 is controlled within the specified range.

[0129] The waterproofing solution for the air conditioner drain pump (drain pump 100) in this embodiment further improves the waterproofing effect by changing the material combination of the water-blocking ring (water-blocking component 150) and improving the assembly precision, while maintaining the characteristics of simple structure and convenient installation.

[0130] It should be noted that Embodiment 1, Embodiment 2, Embodiment 3, and Embodiment 4 are all solutions for preventing water from entering the drain pump motor (motor assembly 130) of the air conditioning drain pump (drain pump 100).

[0131] By installing an annular water-blocking ring (water-blocking component 150) on the motor shaft (rotating shaft 140) of the drainage pump 100, and ensuring that the water-blocking ring is interference-fitted to the motor shaft (rotating shaft 140), while simultaneously aligning the water-blocking ring with the lower edge of the motor cavity bearing chamber (bearing component 133), and controlling the single-sided gap between the lower edge of the motor cavity bearing chamber and the water-blocking ring to ≤0.5mm after assembly, effective control of the external gap 160 of the motor cavity is achieved. When water backflows, it cannot enter the motor cavity along the motor shaft. When water comes into contact with the slit (gap 160) between the water-blocking ring and the bearing chamber, atmospheric pressure and the surface tension of the water effectively prevent water from entering the motor cavity, thereby significantly improving the reliability of the water pump (drainage pump 100) and solving the problem of water backflow into the motor cavity in related technologies. Compared with related technologies, this invention not only guides the flow of water but also completely prevents water from entering the motor cavity through a precisely controlled structural design, fundamentally improving the waterproof performance and service life of the air conditioning drainage pump (drainage pump 100).

[0132] According to a second aspect of the present invention, an air conditioner is provided, including a drain pump 100 as provided in any of the above embodiments, and thus possessing all the beneficial technical effects of the drain pump 100, which will not be repeated here.

[0133] In the description of this specification, the terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0134] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0135] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A drainage pump, characterized in that, include: The pump body is provided with a pump chamber, a water inlet channel and a drainage channel, wherein the water inlet channel and the drainage channel are respectively connected to the pump chamber; An impeller is disposed within the pump chamber; A motor assembly is disposed within the pump body, and the side of the motor assembly facing the impeller has a waterproof hole; A rotating shaft, one end of which passes through the waterproof hole and is connected to the motor assembly, and the other end of which is connected to the impeller; A water-blocking component is fitted onto the outer peripheral wall of the rotating shaft and is at least partially located at the waterproof hole. The water-blocking component is sealed to the rotating shaft and extends radially along the rotating shaft.

2. The drainage pump according to claim 1, characterized in that, The water-blocking component has a mounting hole for fitting with the rotating shaft, the inner diameter of which is smaller than the outer diameter of the rotating shaft.

3. The drainage pump according to claim 1, characterized in that, The water-blocking component has a mounting hole for fitting with the rotating shaft. The wall of the mounting hole is provided with multiple ribs, which are arranged along the axial direction of the rotating shaft and abut against the rotating shaft respectively.

4. The drainage pump according to claim 3, characterized in that, At least one of the ribs is configured as a ring rib.

5. The drainage pump according to any one of claims 1 to 4, characterized in that, Along the radial direction of the rotating shaft, there is a gap between the outer peripheral wall of the water-blocking member and the wall of the waterproof hole.

6. The drainage pump according to claim 5, characterized in that, Along the radial direction of the rotating shaft, the width of the gap W satisfies that W≤0.5mm.

7. The drainage pump according to any one of claims 1 to 4, characterized in that, The motor assembly includes an outer bottom wall on the side facing the impeller, and the waterproof hole is provided on the outer bottom wall; The side of the water-blocking component facing the impeller is flush with the outer bottom wall.

8. The drainage pump according to any one of claims 1 to 4, characterized in that, The outer peripheral wall of the water-blocking component includes a plurality of arc-shaped surfaces arranged along the axial direction of the rotating shaft. The plurality of arc-shaped surfaces include at least an adjacent first arc-shaped surface and a second arc-shaped surface. The first arc-shaped surface is recessed on the side where the rotating shaft is located, and the second arc-shaped surface protrudes on the side away from the rotating shaft.

9. The drainage pump according to any one of claims 1 to 4, characterized in that, The water-blocking component includes a first water-blocking part and a second water-blocking part. Along the radial direction of the rotating shaft, the first water-blocking part is located between the rotating shaft and the second water-blocking part, and the first water-blocking part is sealed to the rotating shaft. The hardness of the first water-blocking part is greater than that of the second water-blocking part.

10. The drainage pump according to any one of claims 1 to 4, characterized in that, Along the axial direction of the rotating shaft, the water-blocking member includes a first end and a second end facing away from each other, the first end being farther away from the impeller than the second end; Wherein, along the radial direction of the rotating shaft, the width of the first end is greater than the width of the second end.

11. The drainage pump according to any one of claims 1 to 4, characterized in that, The water-blocking component includes a first water-blocking portion and a second water-blocking portion, which are arranged along the axial direction of the rotating shaft. The first water-blocking portion is farther away from the impeller than the second water-blocking portion. The first water-blocking portion extends radially along the rotating shaft, and along the radial direction of the rotating shaft, the width of the second water-blocking portion on the side closer to the first water-blocking portion is greater than the width of the second water-blocking portion on the side farther away from the first water-blocking portion.

12. The drainage pump according to any one of claims 1 to 4, characterized in that, The water-blocking component includes an elastic element; and / or the water-blocking component includes a waterproof element.

13. The drainage pump according to any one of claims 1 to 4, characterized in that, The water-blocking component is constructed as a ring-shaped water-blocking component.

14. The drainage pump according to any one of claims 1 to 4, characterized in that, The motor assembly includes: Electric motor; The bearing assembly, the motor, the bearing assembly and the impeller are arranged axially along the shaft, and the bearing assembly is located between the motor and the impeller. The bearing assembly has a waterproof hole on the side facing the impeller, and one end of the shaft passes through the waterproof hole through the bearing assembly.

15. An air conditioner, characterized in that, Includes the drainage pump as described in any one of claims 1 to 14.

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