Drainage pump, drainage system and air conditioner

Abstract

The invention discloses a drainage pump, a drainage system and an air conditioner, and relates to the technical field of air conditioning equipment, the drainage pump comprises a pump body shell, an impeller, a machine shell, a motor and a lifting mechanism, the pump body shell is internally provided with a water suction port, a first mounting cavity and a first water channel, and the first mounting cavity is provided with the impeller. The machine shell is connected with the pump body shell, and the motor and the lifting mechanism are arranged in a second installation cavity and a third installation cavity of the machine shell respectively. The lifting mechanism is provided with a second water channel communicating with the first water channel, and the second water channel communicates with a water outlet in the outer side wall of the machine shell. When the impeller is driven by the motor to rotate, water flow enters the first mounting cavity through the water suction opening, then sequentially enters the first water channel and the second water channel and finally flows out of the water outlet. The water outlet is formed in the machine shell, the lifting mechanism is arranged in the machine shell to guide water to the water outlet, the height of the water outlet of the drainage pump can be increased, rubber hoses are reduced or even not needed, the occupied space of the drainage pump is reduced, and wiring and pipe arrangement are facilitated.

Description

Technical Field

[0001] This invention relates to the field of air conditioning equipment technology, and in particular to a drain pump, a drain system, and an air conditioner. Background Technology

[0002] As a crucial component of air conditioners, the drain pump is commonly used for draining condensate from indoor units or packaged air conditioners. The drain pump's function is to discharge the condensate from the indoor unit through drain pipes to the outside of the air conditioner. In related technologies, air conditioners, such as indoor units, typically mount the drain pump on a drip tray. Due to the limited internal space of the indoor unit, the drain pump's overall structure is relatively compact, and the outlet is located at the bottom of the pump housing, placing it below the side wall of the drip tray. Therefore, a hose or other connecting pipe structure is needed to connect to the outlet to guide the water outside the drip tray; however, using an external hose increases the overall space occupied by the drain pump, which is inconvenient for piping and wiring within the air conditioner. 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 increase the height of the drainage pump outlet, reduce or even eliminate the need for rubber hoses, thereby reducing the space occupied by the drainage pump and facilitating pipe and cable routing.

[0004] The present invention also proposes a drainage system having the above-mentioned drainage pump.

[0005] According to a first aspect of the present invention, a drainage pump includes: a pump housing having an internal suction port, a first mounting cavity, and a first water channel, the suction port being located at one end of the pump housing, the first mounting cavity being located at the other end of the pump housing, and the first water channel communicating with the first mounting cavity; an impeller mounted in the first mounting cavity; a housing connected to the pump housing, the housing having a second mounting cavity and a third mounting cavity located near one end of the first mounting cavity, the outer wall of the housing having an outlet communicating with the third mounting cavity; a motor mounted in the second mounting cavity, the motor being configured to drive the impeller to rotate; and a lifting mechanism configured to guide water flow from the first water channel to the outlet, the lifting mechanism being mounted in the third mounting cavity, the lifting mechanism having a second water channel communicating with the first water channel and the outlet.

[0006] The drainage pump according to embodiments of the present invention has at least the following beneficial effects:

[0007] By setting a suction port, a first mounting cavity, and a first water channel inside the pump casing, the suction port and the first mounting cavity are connected, and an impeller is installed in the first mounting cavity. The casing and the pump body are connected, and the motor and the lifting mechanism are respectively located in the second and third mounting cavities of the casing. The motor and the impeller are driven together, and the lifting mechanism has a second water channel connected to the first water channel, which is connected to the outlet on the outer wall of the casing. When the impeller rotates under the drive of the motor, water flows through the suction port into the first mounting cavity, then sequentially into the first and second water channels, and finally out of the outlet. In this embodiment, by setting the outlet in the casing and setting the lifting mechanism inside the casing to guide the water to the outlet, compared with the related technology where the outlet is set in the pump body casing, the height of the outlet of the drainage pump can be increased, reducing or even eliminating the need for rubber hoses, thereby reducing the space occupied by the drainage pump and facilitating wiring and piping.

[0008] According to some embodiments of the present invention, at least a portion of the outer sidewall of the lifting mechanism is fitted with the sidewall of the third mounting cavity, the second water channel is a second groove formed on the outer sidewall of the lifting mechanism, one end of the second groove is connected to the first water channel, and the other end of the second groove is connected to the outlet.

[0009] According to some embodiments of the present invention, the second groove includes a first groove segment and a second groove segment, wherein the first groove segment and the second groove segment form an angle with each other and are connected in a transitional manner.

[0010] According to some embodiments of the present invention, the first trough section is located on the side closer to the first waterway, the second trough section is located on the side closer to the outlet, and the width of the outlet of the second trough section is greater than the width of the inlet of the first trough section.

[0011] According to some embodiments of the present invention, the second groove includes a plurality of interconnected groove segments, and the plurality of groove segments are connected by an arc transition.

[0012] According to some embodiments of the present invention, the housing is provided with a shaft portion, and the lifting mechanism is sleeve-shaped and sleeved on the shaft portion.

[0013] According to some embodiments of the present invention, the outer side wall of the lifting mechanism is provided with a first limiting part, and the side wall of the third mounting cavity is provided with a second limiting part. The second limiting part cooperates with the first limiting part to restrict the relative rotation of the lifting mechanism and the housing.

[0014] According to some embodiments of the present invention, the first water channel is a first groove formed between the inner wall surface of the first mounting cavity and the outer wall surface of the pump housing, the inner wall surface of the first mounting cavity is provided with a communication port, and the first groove communicates with the first mounting cavity through the communication port;

[0015] The outlet of the first waterway is located on the end face of the pump housing near the lifting mechanism.

[0016] According to some embodiments of the present invention, the inner wall surface of the first mounting cavity forms a first contour line when projected along the rotation axis of the impeller. The first contour line is circular, and the wall surface of the first groove near the outer side of the pump housing forms a second contour line. The first contour line is tangent to the second contour line.

[0017] According to some embodiments of the present invention, the inner diameter of the water inlet gradually increases along the water suction direction of the drainage pump.

[0018] According to some embodiments of the present invention, the impeller includes an inlet blade located at the water inlet, the inlet blade including a conical portion, the width of the conical portion gradually increasing along the water suction direction.

[0019] According to some embodiments of the present invention, the outer surface of the tapered portion is configured to be inclined toward the rotation axis of the impeller, and the inclination angle is α, satisfying: 0°<α≤60°.

[0020] According to some embodiments of the present invention, the minimum distance between the inner wall of the water inlet and the outer side of the conical part is d, which satisfies: 2mm≤d≤5mm.

[0021] According to some embodiments of the present invention, the drainage pump includes a drainage pipe, which is fixedly connected to the outer wall of the housing, and the inner hole of the drainage pipe communicates with the water outlet.

[0022] According to some embodiments of the present invention, the drain pump further includes a fixing sleeve for mounting the drain pump, the fixing sleeve being disposed around the outside of the drain pipe, and the end of the fixing sleeve being provided with a mounting flange.

[0023] According to a second aspect of the present invention, a drainage system includes a water receiving tray and a drainage pump as described in the above embodiments, wherein the lowest point of the outlet of the drainage pump is higher than the side wall of the water receiving tray.

[0024] The drainage system according to embodiments of the present invention has at least the following beneficial effects:

[0025] The drainage pump of the first embodiment comprises a suction port, a first mounting cavity, and a first water channel inside the pump casing. The suction port and the first mounting cavity are connected, and an impeller is mounted in the first mounting cavity. A casing and a pump body are connected. A motor and a lifting mechanism are respectively located in a second mounting cavity and a third mounting cavity of the casing. The motor and impeller are driven together. The lifting mechanism has a second water channel connected to the first water channel, and the second water channel is connected to an outlet on the outer wall of the casing. When the impeller rotates under the drive of the motor, water flows through the suction port into the first mounting cavity, then sequentially into the first and second water channels, and finally exits from the outlet. This embodiment, by placing the outlet in the casing and using a lifting mechanism inside the casing to guide water to the outlet, increases the height of the drainage pump's outlet compared to related technologies where the outlet is located in the pump body casing. This reduces or eliminates the need for rubber hoses, thereby reducing the space occupied by the drainage pump and facilitating wiring and piping.

[0026] An air conditioner according to a third aspect of the present invention includes the drainage system described in the above embodiments.

[0027] The drainage system according to embodiments of the present invention has at least the following beneficial effects:

[0028] The drainage system of the second embodiment includes a drainage pump with a suction port, a first mounting cavity, and a first water channel inside the pump housing. The suction port and the first mounting cavity are connected, and an impeller is installed in the first mounting cavity. A casing and a pump housing are connected, and a motor and a lifting mechanism are respectively located in a second and third mounting cavity of the casing. The motor and impeller are driven together. The lifting mechanism has a second water channel connected to the first water channel, and the second water channel is connected to an outlet on the outer wall of the casing. When the impeller rotates under the drive of the motor, water flows through the suction port into the first mounting cavity, then sequentially into the first and second water channels, and finally exits from the outlet. This embodiment, by placing the outlet in the casing and using a lifting mechanism inside the casing to guide water to the outlet, increases the height of the drainage pump's outlet compared to related technologies where the outlet is located in the pump housing. This reduces or eliminates the need for rubber hoses, thereby reducing the space occupied by the drainage pump and facilitating wiring and piping.

[0029] 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

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0031] Figure 1 This is a schematic diagram of the structure of a drainage pump according to an embodiment of the present invention and a common water pump in the related art;

[0032] Figure 2 This is a schematic diagram of a drainage pump according to an embodiment of the present invention and a conventional water pump in related technologies mounted on a mounting plate;

[0033] Figure 3 This is a cross-sectional view of a drainage pump according to an embodiment of the present invention;

[0034] Figure 4 This is an exploded view of a drainage pump according to an embodiment of the present invention;

[0035] Figure 5 This is a partial structural cross-sectional view of a drainage pump according to an embodiment of the present invention;

[0036] Figure 6 This is a schematic diagram of the pump housing structure according to an embodiment of the present invention;

[0037] Figure 7 This is a top view of the pump housing according to an embodiment of the present invention;

[0038] Figure 8 This is a structural schematic diagram of a lifting mechanism according to an embodiment of the present invention;

[0039] Figure 9 This is a schematic diagram of the casing structure according to an embodiment of the present invention;

[0040] Figure 10 This is a side view of an impeller according to an embodiment of the present invention;

[0041] Figure 11 This is a schematic diagram of the structure of a drainage pump according to another embodiment of the present invention;

[0042] Figure 12 This is a bottom view of a drainage pump according to an embodiment of the present invention;

[0043] Figure 13 This is a bottom view of a drainage pump according to another embodiment of the present invention.

[0044] Icon labels:

[0045] 1000 drain pumps;

[0046] Pump body shell 100; suction port 110; first mounting cavity 120; connecting port 121; first outline 122; inner wall surface 123; first water channel 130; first groove 131; second outline 132; outer wall surface 140;

[0047] Impeller 200; Inlet blades 210; Conical section 211;

[0048] Housing 300; Second mounting cavity 310; Third mounting cavity 320; Water outlet 321; Second limiting part 322; Drain pipe 323; Shaft part 330; Fixing sleeve 340; Mounting flange 341; End cover 350; Mounting base 360; Adapter 370; Connecting pipe 371;

[0049] Motor 400; Drive shaft 410;

[0050] Lifting mechanism 500; second waterway 510; second groove 511; first groove section 512; second groove section 513; first limiting part 520;

[0051] Water receiving tray 600; mounting plate 610; through hole 611;

[0052] Ordinary water pump 2000; rubber hose 2100. Detailed Implementation

[0053] 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.

[0054] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0055] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0056] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" 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.

[0057] When an air conditioner is cooling, the indoor air exchanges heat with the heat exchanger, producing condensate, which collects in a drip tray. To prevent condensate from leaking out of the drip tray, some air conditioners use a water pump to drain the condensate. Because of the limited installation space, water pumps are relatively small. For example... Figure 1As shown, for ease of distinction later, the existing water pump is referred to as ordinary water pump 2000, and the improved water pump is referred to as drainage pump 1000. The outlet 321 of the ordinary water pump 2000 is located on the pump housing 100, resulting in the outlet 321 being lower than the side wall of the water receiving tray 600. Therefore, a rubber hose 2100 is required, as shown in the diagram. Figure 2 As shown, one end of the rubber hose 2100 is connected to the water outlet 321, and the other end is connected to the mounting plate 610. This will increase the space occupied by the ordinary water pump 2000, which is not conducive to the routing of pipes and the wiring of the motor 400.

[0058] In order to increase the height of outlet 321, refer to Figure 3 , Figure 4 and Figure 5 As shown, a drainage pump 1000 according to an embodiment of the present invention includes a pump housing 100, an impeller 200, a motor 400, a casing 300, and a lifting mechanism 500. The pump housing 100 has an internal suction port 110, a first mounting cavity 120, and a first water channel 130. The suction port 110 is located at the lower end of the pump housing 100, and the first mounting cavity 120 is located at the upper end of the pump housing 100 and communicates with the suction port 110. The impeller 200 is mounted within the first mounting cavity 120. (Refer to...) Figure 6 As shown, the first mounting cavity 120 is provided with a connecting port 121, and the first water channel 130 is connected to the first mounting cavity 120 through the connecting port 121. For example, the connecting port 121 is located on the side wall of the first mounting cavity 120. When the impeller 200 draws water from the suction port 110 into the first mounting cavity 120, the impeller 200 can throw the water out to the side wall of the first mounting cavity 120, which facilitates the water flow through the connecting port 121 into the first water channel 130.

[0059] Reference Figure 3 As shown, the housing 300 is connected to the upper end of the pump body housing 100, and the connection method can be a snap-fit ​​connection, a fastener connection, a threaded connection, etc. The housing 300 has a second mounting cavity 310 and a third mounting cavity 320, which are located at the end closest to the first mounting cavity 120. (Refer to...) Figure 4 As shown, the outer wall of the housing 300 is provided with an outlet 321 communicating with the third mounting cavity 320. For example, the outer wall of the housing 300 is provided with a drain pipe 323, and the outlet 321 communicating with the third mounting cavity 320 is formed within the drain pipe 323. A motor 400 is installed in the second mounting cavity 310, and the motor 400 is configured to drive the impeller 200 to rotate. For example, the motor 400 includes a drive shaft 410, and the drive shaft 410 is fixedly connected to the main shaft of the impeller 200. A lifting mechanism 500 is installed in the third mounting cavity 320, and the lifting mechanism 500 is provided with a second water channel 510, the two ends of which are respectively connected to the first water channel 130 and the outlet 321. (Refer to...) Figure 5 As shown, Figure 5 The dotted line with arrows indicates the direction of water flow. Driven by the impeller 200, the second water channel 510 can guide the water flow from the first water channel 130 to the outlet 321.

[0060] By adopting the above scheme, when the impeller 200 rotates under the drive of the motor 400, the water flows into the first mounting cavity 120 through the suction port 110, then sequentially into the first water channel 130 and the second water channel 510, and finally exits from the outlet 321. Since the outlet 321 is located in the casing 300 instead of the pump body casing 100, and a lifting mechanism 500 is set inside the casing 300 to guide the water to the outlet 321, the height of the outlet 321 of the drain pump 1000 can be increased, reducing or eliminating the need for the rubber hose 2100, thereby reducing the space occupied by the drain pump 1000, and facilitating pipe and cable routing, such as facilitating the routing of the motor 400's cables and the arrangement of refrigerant pipes.

[0061] Reference Figure 6 As shown, in an embodiment of the present invention, the first water channel 130 is a first groove 131, which is formed between the inner wall surface 123 of the first mounting cavity 120 and the outer wall surface 140 of the pump housing 100. The inner wall surface 123 of the first mounting cavity 120 is provided with a connecting port 121. The outlet of the first water channel 130 is located on the end face of the pump housing 100 facing the lifting mechanism 500. Therefore, when the end faces of the lifting mechanism 500 and the pump housing 100 abut, they can seal the perimeter of the outlet of the first groove 131 and form a first flow path. Through the sealing cooperation between the lifting mechanism 500 and the pump housing 100, water can be reduced or prevented from seeping from the outlet of the first groove 131 to other locations. In another embodiment of the present invention, the first water channel 130 can also be a water pipe, with one end connected to the connecting port 121 and the other end connected to the second water channel 510. The appropriate solution is selected according to the actual situation. For ease of explanation, the following description will use the first groove 131 as the first water channel 130.

[0062] Reference Figure 7 As shown in the embodiment of the present invention, on the projection plane perpendicular to the rotation axis of the impeller 200, the inner wall surface 123 of the first mounting cavity 120 forms a first contour line 122, which is circular. The wall surface of the first groove 131 near the outer side of the pump housing 100 forms a second contour line 132, and the first contour line 122 and the second contour line 132 are tangent to each other. Using the above scheme, the water flows along the tangential direction, which can reduce the resistance of the water flow, reduce flow loss, and improve the smoothness of the water flow.

[0063] Refer to 3 and Figure 4As shown, in an embodiment of the present invention, the second water channel 510 is a second groove 511 formed on the outer side wall of the lifting mechanism 500, and at least a portion of the outer side wall of the lifting mechanism 500 is in contact with the side wall of the third mounting cavity 320, thereby sealing a portion of the opening of the second groove 511 to form a sealed second flow path, reducing or avoiding water leakage. One end of the second groove 511 is connected to the first groove 131, and the other end is connected to the outlet 321, thereby guiding the water flow from the first groove 131 to the outlet 321. In another embodiment, the second water channel 510 can also be a water pipe, with one end connected to the first groove 131 and the other end connected to the outlet 321. The specific form of the second water channel 510 is selected according to the actual situation. For ease of explanation, the second groove 511 will be used as an example for the following description.

[0064] Continue to refer to Figure 3 and Figure 4 As shown in the embodiment of the present invention, the second groove 511 includes a first groove segment 512 and a second groove segment 513. The first groove segment 512 and the second groove segment 513 are connected, and the connection point is an angled transition between each other. The transition connection can reduce the pressure loss caused by the direct impact of water flow, thereby improving drainage efficiency. The first groove segment 512 extends upward and at an inclination. The inclination angle of the second groove segment 513 relative to the axis of the drainage pump 1000 is greater than the inclination angle of the first groove segment 512. Therefore, the inclination angle between the second groove segment 513 and the horizontal plane is smaller, which is conducive to the upward flow of water and improves the smoothness of drainage by the drainage pump 1000.

[0065] Reference Figure 4 As shown, in this embodiment of the invention, the first groove segment 512 is located on the side near the first groove 131, and the second groove segment 513 is located on the side near the outlet 321. The width of the outlet of the second groove segment 513 is greater than the width of the inlet of the first groove segment 512. Here, the width of each groove segment refers to the arc length between the two endpoints of the groove segment along the outer circumference of the lifting mechanism 500. It can be understood that the larger outlet width of the second groove segment 513 improves the smoothness of water discharge; moreover, the position of the outlet 321 can be adjusted according to actual needs, for example, the outlet 321 can be offset to the middle of the housing 300. In addition, the positional accuracy requirement for the outlet 321 is also lower, reducing the requirements for processing accuracy and assembly accuracy.

[0066] In another embodiment of the present invention, the second groove 511 may further include multiple groove segments, with three or more segments. The multiple groove segments are connected by a circular arc transition to reduce pressure loss and improve drainage efficiency. A suitable solution may be selected based on the specific circumstances.

[0067] Reference Figure 3 and Figure 9As shown in the embodiment of the present invention, a shaft portion 330 is provided inside the housing 300, and the shaft portion 330 and the inner wall of the housing 300 are spaced apart, so that an annular third mounting cavity 320 is formed between the outer wall of the shaft portion 330 and the inner wall of the housing 300. The lifting mechanism 500 is sleeve-shaped and sleeved on the shaft portion 330, which can simplify the installation process and improve installation efficiency. A partial second mounting cavity 310 is formed inside the shaft portion 330, which facilitates the drive shaft 410 of the motor 400 to pass through the second mounting cavity 310 and connect with the impeller 200. Therefore, the drainage pump 1000 has a reasonable and compact structural design, which is conducive to the miniaturization of the drainage pump 1000.

[0068] Reference Figure 8 and Figure 9 As shown, in an embodiment of the present invention, the outer wall of the lifting mechanism 500 is provided with a first limiting part 520, and the side wall of the third mounting cavity 320 is provided with a second limiting part 322. The first limiting part 520 and the second limiting part 322 cooperate to limit the rotation of the lifting mechanism 500 relative to the housing 300, so as to ensure that the first groove 131 and the second groove 511 are always in a connected state. For example, the first limiting part 520 is a first flat part, and the second limiting part 322 is a second flat part. The first flat part is formed by cutting off a portion of the outer wall of the lifting mechanism 500, while the second flat part is formed by adding a protrusion to the side wall of the third mounting cavity 320. Through the cooperation of the first flat part and the second flat part, the rotation of the lifting mechanism 500 relative to the housing 300 can be avoided, and the structure is simple and reliable. In another embodiment, in addition to the first flat part and the second flat part scheme, a snap-fit ​​and slot scheme can also be used. The appropriate scheme can be selected according to the actual situation.

[0069] When the impeller 200 is not installed correctly, an eccentricity problem will occur. This eccentricity can cause the impeller 200 to collide with the inner wall of the suction port 110 during rotation, resulting in abnormal noise and affecting the smoothness of its operation. The inner diameter of the suction port 110 is determined by the air discharge capacity of the impeller 200. Blindly increasing the inner diameter of the suction port 110 will cause the air intake velocity to be less than the impeller 200's discharge capacity, thus preventing the drainage pump 1000 from draining water. Therefore, increasing the inner diameter of the suction port 110 means simultaneously increasing the diameter of the impeller 200, but this will increase the volume of the drainage pump 1000. In other words, the problem of the impeller 200 colliding cannot be solved directly by increasing the inner diameter of the suction port 110. Therefore, referring to... Figure 3As shown in the embodiment of the present invention, the inner diameter of the suction port 110 gradually increases along the suction direction of the drainage pump 1000. For example, the inner diameter of the suction port 110 gradually increases from bottom to top, while the lower inner diameter of the suction port 110 remains basically unchanged. Therefore, it has little impact on the overall performance of the drainage pump 1000 and can effectively reduce or avoid the impeller 200 from hitting the inner wall of the suction port 110, reduce the occurrence of abnormal noise, and improve the stability of the impeller 200 operation.

[0070] Reference Figure 3 and Figure 10 As shown, in an embodiment of the present invention, the impeller 200 includes an inlet blade 210 located at the suction port 110. The inlet blade 210 includes a conical portion 211, the width of which gradually increases along the suction direction. For example, the width of the conical portion 211 gradually increases from bottom to top. It should be noted that the width of the conical portion 211 refers to its radial width along the impeller 200. Using the conical portion 211 effectively increases the width of the inlet blade 210, thereby improving the suction capacity. With the same displacement, the drainage pump 1000 of this embodiment requires a lower rotational speed, thus reducing vibration, noise, and improving the user experience. At the same rotational speed, the drainage pump 1000 of this embodiment has a larger displacement and higher drainage efficiency.

[0071] Reference Figure 10 As shown, Figure 10 The dashed line in the figure represents the rotation axis of the impeller 200. In embodiments of the present invention, the outer surface of the tapered portion 211 is configured to be inclined toward the rotation axis of the impeller 200, and the inclination angle is α, satisfying: 0°<α≤60°, for example, α can be 15°, 30°, 45°, 55°, etc. When α=0°, the impeller 200 does not have the effect of increasing drainage capacity. When α>60°, the inner diameter of the suction port 110 needs to be increased accordingly. Since the bottom wall of the water receiving tray 600 is usually provided with a settling groove, and the suction port 110 needs to be inserted into the settling groove; therefore, if the inner diameter of the suction port 110 increases too much, the pump body shell 100 will not be able to be installed in the settling groove, resulting in a reduction in drainage capacity. Therefore, by reasonably designing the size of α, it is possible to improve the drainage capacity of the drainage pump 1000 while ensuring that the drainage pump 1000 can be smoothly installed in the settling groove.

[0072] Reference Figure 3As shown in the embodiment of the present invention, the minimum distance between the inner wall of the suction port 110 and the outer surface of the conical portion 211 is d, which satisfies the condition: 2mm ≤ d ≤ 5mm. For example, d can be 2.3mm, 3mm, 3.5mm, 4mm, 4.5mm, etc., and the inner wall of the suction port 110 can be parallel to the outer surface of the conical portion 211. When d < 2mm, the inlet blade 210 is prone to contact with the inner wall of the suction port 110, resulting in collisions and wear, generating noise and causing a decrease in the smoothness of the impeller 200's operation. When d > 5mm, the width of the conical portion 211 decreases, leading to a decrease in suction capacity and a deterioration in the performance of the drainage pump 1000. Therefore, by rationally designing the size of d, the collisions of the inlet blade 210 can be reduced, while also improving the performance and reliability of the drainage pump 1000.

[0073] Reference Figure 12 As shown, Figure 12 The dashed line with an arrow indicates the direction of water flow. In an embodiment of the invention, the central axis of the drain pipe 323 intersects the rotation axis of the impeller 200, meaning the drain pipe 323 is located in the middle of the housing 300. (Refer to...) Figure 2 As shown, in an embodiment of the present invention, the outer wall of the housing 300 is provided with a mounting base 360, the drain pump 1000 is fixedly connected to the mounting plate 610 via the mounting base 360, and the drain pipe 323 is connected to the mounting plate 610 via other structures. To further simplify the structure of the drain pump 1000, refer to... Figure 11 As shown, in another embodiment of the present invention, the drain pump 1000 further includes a fixing sleeve 340. The fixing sleeve 340 is disposed around the outside of the drain pipe 323 and fixedly connected to the housing 300. A mounting flange 341 is provided at the end of the fixing sleeve 340 facing away from the housing 300. The mounting flange 341 is used to fixably connect to the mounting plate 610, thereby fixing the position of the drain pump 1000 relative to the water receiving tray 600. It is understood that by adopting the above solution, the original mounting base 360 ​​can be eliminated, and the connection between the mounting flange 341 and the mounting plate 610 can be directly made, further simplifying the structure of the drain pump 1000, reducing its volume, and making its structure more compact.

[0074] Reference Figure 13 As shown, Figure 13 The dashed line with an arrow indicates the direction of water flow. In another embodiment of the invention, the central axis of the drain pipe 323 does not intersect the rotation axis of the impeller 200, that is, the drain pipe 323 is offset relative to the center of the housing 300. For example, the drain pipe 323 is located tangentially to the outer wall of the housing 300, so that the water flow from the outlet of the second water channel 510 can flow directly into the drain pipe 323 from the tangential direction of the lifting mechanism 500, reducing water flow resistance. By setting the drain pipe 323 in different positions, installation requirements under different conditions can be met.

[0075] Reference Figure 3 and Figure 4 As shown in the embodiment of the present invention, the drainage pump 1000 further includes an end cover 350, which is connected to the end of the housing 300 away from the pump body housing 100. The connection method can be a snap-fit ​​connection, a fastener connection, a threaded connection, etc. The end cover 350 is used to close the opening of the second mounting cavity 310 to protect the motor 400 and prevent water, dust, etc. from entering the motor 400.

[0076] A drainage system according to one embodiment of the present invention includes a water receiving tray 600 and a drainage pump 1000 as described in the above embodiments. The lowest point of the outlet 321 of the drainage pump 1000 is higher than the side wall of the water receiving tray 600. The drainage system of this embodiment uses the drainage pump 1000 described in the above embodiments. The pump housing 100 has a suction port 110, a first mounting cavity 120, and a first water channel 130 disposed inside the pump housing 100. The suction port 110 and the first mounting cavity 120 are connected, and an impeller 200 is mounted in the first mounting cavity 120. A casing 300 is connected to the pump housing 100. A motor 400 and a lifting mechanism 500 are respectively disposed in a second mounting cavity 310 and a third mounting cavity 320 of the casing 300. The motor 400 and the impeller 200 are drivenly connected. The lifting mechanism 500 has a second water channel 510 that communicates with the first water channel 130. The second water channel 510 is connected to the outlet 321 on the outer wall of the casing 300. When the impeller 200 rotates under the drive of the motor 400, water flows through the suction port 110 into the first mounting cavity 120, then sequentially into the first water channel 130 and the second water channel 510, and finally exits from the outlet 321. In this embodiment, by setting the outlet 321 in the housing 300 and providing a lifting mechanism 500 inside the housing 300 to guide the water to the outlet 321, compared with the related technology where the outlet 321 is set in the pump body housing 100, the height of the outlet 321 of the drainage pump 1000 can be increased, reducing or even eliminating the need for the rubber hose 2100, thereby reducing the space occupied by the drainage pump 1000 and facilitating wiring and piping.

[0077] Reference Figure 11 As shown, in an embodiment of the present invention, the drainage system further includes a mounting plate 610 and an adapter 370. The mounting plate 610 has a through hole 611, and the adapter 370 is located on the side of the mounting plate 610 away from the mounting flange 341. The adapter 370 includes a connecting pipe 371, which is inserted into the drain pipe 323 through the through hole 611. The adapter 370 is made of rubber, silicone, or the like. By providing the adapter 370, it is convenient to guide condensate water to the outside of the air conditioner through an external pipe, for example, directly to the outdoors.

[0078] Since the drainage system of this invention adopts all the technical solutions of the drainage pump 1000 of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0079] An air conditioner according to one embodiment of the present invention includes the drainage system of the above embodiments. The drainage pump 1000 of the drainage system has a suction port 110, a first mounting cavity 120, and a first water channel 130 provided inside the pump housing 100. The suction port 110 and the first mounting cavity 120 are connected, and an impeller 200 is installed in the first mounting cavity 120. The housing 300 is connected to the pump housing 100. The motor 400 and the lifting mechanism 500 are respectively disposed in the second mounting cavity 310 and the third mounting cavity 320 of the housing 300. The motor 400 and the impeller 200 are drivenly connected. The lifting mechanism 500 has a second water channel 510 that communicates with the first water channel 130. The second water channel 510 communicates with the outlet 321 on the outer wall of the housing 300. When the impeller 200 rotates under the drive of the motor 400, water flows through the suction port 110 into the first mounting cavity 120, then sequentially into the first water channel 130 and the second water channel 510, and finally exits from the outlet 321. In this embodiment, by setting the outlet 321 in the housing 300 and providing a lifting mechanism 500 inside the housing 300 to guide the water to the outlet 321, compared with the related technology where the outlet 321 is set in the pump body housing 100, the height of the outlet 321 of the drainage pump 1000 can be increased, reducing or even eliminating the need for the rubber hose 2100, thereby reducing the space occupied by the drainage pump 1000 and facilitating wiring and piping.

[0080] The air conditioner of this invention adopts all the technical solutions of the drainage system of the above embodiments, and therefore has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0081] 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: The pump housing has an internal suction port, a first mounting cavity, and a first water channel. The suction port is located at one end of the pump housing, the first mounting cavity is located at the other end of the pump housing, and the first water channel communicates with the first mounting cavity. The impeller is installed inside the first mounting cavity; A housing is connected to the pump body housing. The housing has a second mounting cavity and a third mounting cavity located near one end of the first mounting cavity. The outer wall of the housing has an outlet that communicates with the third mounting cavity. A motor is installed in the second mounting cavity, and the motor is configured to drive the impeller to rotate. A lifting mechanism is configured to guide the water flow from the first water channel to the outlet. The lifting mechanism is installed in the third mounting cavity and has a second water channel that connects the first water channel and the outlet.

2. The drainage pump according to claim 1, characterized in that: At least a portion of the outer sidewall of the lifting mechanism is in contact with the sidewall of the third mounting cavity. The second water channel is a second groove formed on the outer sidewall of the lifting mechanism. One end of the second groove is connected to the first water channel, and the other end of the second groove is connected to the water outlet.

3. The drainage pump according to claim 2, characterized in that: The second groove includes a first groove segment and a second groove segment, which are at an angle to each other and are connected in a transitional manner.

4. The drainage pump according to claim 3, characterized in that: The first trough section is located on the side closer to the first waterway, and the second trough section is located on the side closer to the outlet. The width of the outlet of the second trough section is greater than the width of the inlet of the first trough section.

5. The drainage pump according to claim 2, characterized in that: The second groove includes multiple interconnected groove segments, which are connected by a circular arc transition.

6. The drainage pump according to claim 1, characterized in that: The housing has a shaft, and the lifting mechanism is sleeve-shaped and sleeved on the shaft.

7. The drainage pump according to claim 2, characterized in that: The outer side wall of the lifting mechanism is provided with a first limiting part, and the side wall of the third mounting cavity is provided with a second limiting part. The second limiting part cooperates with the first limiting part to restrict the relative rotation of the lifting mechanism and the housing.

8. The drainage pump according to claim 1, characterized in that: The first water channel is a first groove formed between the inner wall surface of the first mounting cavity and the outer wall surface of the pump body shell. The inner wall surface of the first mounting cavity is provided with a communication port, and the first groove is connected to the first mounting cavity through the communication port. The outlet of the first waterway is located on the end face of the pump housing near the lifting mechanism.

9. The drainage pump according to claim 8, characterized in that: Projecting along the rotation axis of the impeller, the inner wall surface of the first mounting cavity forms a first contour line, which is circular, and the wall surface of the first groove near the outer side of the pump housing forms a second contour line, with the first contour line and the second contour line being tangent.

10. The drainage pump according to claim 1, characterized in that: The inner diameter of the water inlet gradually increases along the water suction direction of the drainage pump.

11. The drainage pump according to claim 10, characterized in that: The impeller includes inlet blades located at the water inlet, and the inlet blades include a conical portion, the width of which gradually increases along the water intake direction.

12. The drainage pump according to claim 11, characterized in that: The outer surface of the tapered portion is configured to be inclined toward the rotation axis of the impeller, and the inclination angle is α, satisfying: 0°<α≤60°.

13. The drainage pump according to claim 11 or 12, characterized in that: The minimum distance between the inner wall of the water inlet and the outer side of the conical part is d, which satisfies: 2mm≤d≤5mm.

14. The drainage pump according to claim 1, characterized in that: The drainage pump includes a drainage pipe, which is fixedly connected to the outer wall of the housing, and the inner hole of the drainage pipe is connected to the water outlet.

15. The drainage pump according to claim 14, characterized in that: The drain pump also includes a fixing sleeve for mounting the drain pump, the fixing sleeve being disposed around the outside of the drain pipe, and the end of the fixing sleeve being provided with a mounting flange.

16. A drainage system, characterized in that, include: Water tray; The drainage pump according to any one of claims 1 to 15, wherein the lowest point of the outlet of the drainage pump is higher than the side wall of the receiving pan.

17. An air conditioner, characterized in that: Includes the drainage system as described in claim 16.

Images