Drain pump of a washing apparatus and washing apparatus

Abstract

This invention belongs to the technical field of washing equipment, and discloses a drain pump and washing equipment for a washing device. The drain pump has a filter chamber, a connecting port, and a drain chamber connected in sequence. The filter chamber is provided with a water inlet. The drain pump is provided with a water guiding mechanism, the outlet of which is located between the water inlet and the connecting port. During the drainage process, part of the water discharged by the drain pump is introduced into the filter chamber, agitating the water inside. In this invention, by guiding part of the water discharged by the drain pump back into the filter chamber through the water guiding mechanism, water flow disturbance can be increased in the filter chamber during the drainage process, making it impossible for small lint to accumulate stably and allowing it to be smoothly discharged with the drainage water flow. This reduces the frequency of drain pump clogging by lint, extends the interval between manual cleaning by the user, and thus improves the user experience.

Description

Technical Field

[0001] This invention belongs to the field of washing equipment, and more specifically, relates to a drain pump and washing equipment for washing equipment. Background Technology

[0002] Washing machines and other laundry appliances are common household appliances. One way these machines drain water is by using a drain pump. However, lint is inevitably generated during the washing process, and clothes may also contain foreign objects that the user forgets to remove. These lint or foreign objects can enter the drain pump with the water flow during drainage, potentially tangling with the impeller or causing it to jam. This can reduce drainage efficiency or interrupt the drainage process, and in more serious cases, damage the drain motor, preventing the user from completing the wash and incurring additional repair costs.

[0003] To address the aforementioned issues, existing technologies incorporate filters within the drainage pumps. These filters intercept larger pieces of lint and other debris upstream of the impeller, preventing them from interfering with the pump's operation. However, with prolonged use, lint accumulates, leading to a significant decrease in drainage efficiency. When drainage requirements are not met, the pump stops operating and notifies the user via a display screen, speaker, or other hardware. The filter cleaning process is typically complex, requiring opening the cover, removing the flow tube, unplugging the pipe, locating the water container, draining any remaining water, removing the filter element, cleaning it, and then reassembling the process. Furthermore, users may encounter lint that has accumulated over time, turning black and even developing an odor, on the filter element during cleaning, resulting in a poor user experience.

[0004] The key to improving the user experience is to slow down the rate at which the filter gets clogged by lint, thereby reducing the frequency of cleaning by the user.

[0005] In view of this, the present invention is hereby proposed. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art. On the one hand, it provides a drain pump for a washing device that can prevent the drain pump from being blocked by lint too quickly, thereby extending the time interval for manual cleaning by the user.

[0007] In another aspect, the present invention provides a washing device having the above-described drain pump.

[0008] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0009] A drain pump for a washing device has a filter chamber, a connecting port, and a drain chamber connected in sequence, wherein the filter chamber is provided with a water inlet;

[0010] The drainage pump is equipped with a water intake mechanism, and the outlet of the water intake mechanism is located between the water inlet and the connecting port. During the drainage process, part of the water discharged by the drainage pump is introduced into the filter chamber to agitate the water in the filter chamber.

[0011] Furthermore, the water outlet and the water inlet of the water-guiding mechanism are respectively disposed on the side wall of the filter chamber, and the water outlet and the water inlet of the water-guiding mechanism are staggered along the axial direction of the filter chamber.

[0012] Preferably, the water flow entering the filter chamber along the water inlet mechanism agitates the water flowing from the inlet to the connecting port;

[0013] Preferably, during the drainage process, a portion of the water discharged by the drainage pump is driven by the pressure difference and enters the filter chamber along the water intake mechanism.

[0014] Furthermore, the communication port is located at one end of the filter cavity;

[0015] The filter chamber is provided with a filter assembly having a filter structure, which is located in the area near the communication port; the water outlet of the water intake mechanism is located near the filter structure.

[0016] Preferably, the side wall of the filter chamber is provided with a flushing port; the water intake mechanism includes a water intake pipe with one end connected to the outlet of the drain pump and the other end connected to the flushing port;

[0017] The opening direction of the flushing port is perpendicular to the side wall of the filter chamber, or at a certain angle to the normal of the side wall of the filter chamber.

[0018] Furthermore, the filter structure includes a tapered portion extending from the communication port into the filter chamber with a gradually decreasing inner diameter, and a first water inlet connected to the communication port at the extended end of the tapered portion;

[0019] The flushing outlet is disposed toward the side wall of the conical portion, or near the extended end of the conical portion;

[0020] Preferably, the filter assembly has a central column extending along the axis of the filter chamber, one end of the central column being inserted into the extended end of the conical portion with a gap, and the first water inlet is formed between the outer periphery of the central column and the inner wall of the conical portion;

[0021] At least two flush outlets are arranged at intervals around the central column.

[0022] Furthermore, the water inlet pipe extends a certain length into the filter chamber through the flushing port;

[0023] Preferably, the water inlet pipe passes through the flushing port and extends toward the filter assembly;

[0024] More preferably, the water inlet pipe extends toward the sidewall of the tapered portion of the filter assembly.

[0025] Furthermore, the portion of the water inlet pipe that extends into the filter chamber is made of a flexible material;

[0026] Preferably, the filter assembly and the flushing port are spaced apart; the length of the water pipe extending into the filter chamber is greater than the distance between the flushing port and the filter assembly.

[0027] Furthermore, the flushing port is located between the water inlet and the filter structure, and the outlet end of the water pipe is connected to the flushing port;

[0028] Preferably, the opening direction of the flushing port is set along the tangential direction of the side wall of the filter chamber.

[0029] Furthermore, the filter assembly has a tapered portion extending from the communication port into the filter chamber with a gradually decreasing inner diameter, and a first water inlet is provided at the extended end of the tapered portion;

[0030] The first water inlet and the water inlet are spaced apart along the axial direction of the filter chamber, and the flushing outlet is located between the water inlet and the first water inlet along the axial direction of the filter chamber.

[0031] Furthermore, at least two flushing ports are provided at circumferential intervals along the filter chamber, and the opening direction of each flushing port is either clockwise or counterclockwise.

[0032] At least two water inlet pipes are provided, each corresponding to one of the flushing outlets; or, the water inlet pipe has at least two outlet ends that are corresponding to one of the flushing outlets.

[0033] A washing device, comprising a drain pump as described above;

[0034] Preferably, during the drainage process, the drainage water flows sequentially through the filter chamber, the connecting port, and the drainage chamber before being discharged from the drainage pump. A portion of the water discharged by the drainage pump flows back to the filter chamber along the water intake mechanism.

[0035] The amount of water flowing back along the water intake mechanism is less than the amount of water discharged by the drainage pump.

[0036] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0037] In this invention, a water-guiding mechanism is provided to guide a portion of the water discharged from the drainage pump back into the filter chamber. By placing the outlet of the water-guiding mechanism between the inlet of the filter chamber and the connecting port for connecting the drainage chamber, during the drainage process, the water flow entering the filter chamber along the water-guiding mechanism can increase the water flow disturbance within the filter chamber. In particular, it can agitate the water flowing from the inlet to the connecting port, preventing small lint from accumulating stably and allowing it to be smoothly discharged with the drainage water flow. This reduces the frequency of the drainage pump being blocked by lint, extends the interval between manual cleaning by the user, and thus improves the user experience.

[0038] In this invention, the water outlet of the water inlet mechanism is located close to the filter structure of the filter assembly inside the filter chamber. This can impact large pieces of lint or foreign objects that remain near the filter structure, or increase the disturbance of the water flow near the filter structure, so that large pieces of lint or foreign objects cannot remain stably near the filter structure. This avoids the problem of drainage pump blockage caused by small pieces of lint accumulating around large pieces of lint or foreign objects.

[0039] In this invention, the water inlet pipe extends into the filter chamber, getting closer to the filter assembly, which can provide a greater impact force. On the other hand, the part of the water inlet pipe that extends into the filter chamber is made of flexible material. When the water flow along the water inlet pipe is rapid, the outlet end of the water inlet pipe can swing irregularly, further disturbing the water flow from the inlet to the connecting port. When the part of the water inlet pipe that extends into the filter chamber is long enough, it can also strike the filter assembly when swinging, causing the filter assembly to vibrate to a certain amplitude, so that coarse lint or foreign objects cannot stay stably.

[0040] In this invention, the direction of the flushing outlet is set to have a certain angle with the normal of the filter chamber sidewall, preferably set to the tangent direction of the filter chamber sidewall. This can drive the water flowing from the inlet to the connecting outlet to rotate around the filter chamber axis, thereby preventing large lint or foreign objects from staying stably and achieving the purpose of preventing the drain pump from being blocked.

[0041] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0042] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0043] Figure 1 This is a schematic diagram of the washing equipment in an embodiment of the present invention;

[0044] Figure 2This is a schematic diagram of a specific structure of the drainage pump in Embodiment 1 of the present invention;

[0045] Figure 3 yes Figure 2 The diagram shows a cross-sectional view of the drainage pump along section AA.

[0046] Figure 4 This is a schematic diagram of a specific structure of the drainage pump in Embodiment 2 of the present invention;

[0047] Figure 5 yes Figure 4 The diagram shows a sectional view of the drainage unit along section BB.

[0048] Figure 6 This is a comparison chart of the drainage resistance variation curve over time in the embodiment of the present invention and the existing drainage structure.

[0049] In the diagram: 100, casing; 210, outer cylinder; 220, inner cylinder; 300, machine door; 400, drain pump; 401, filter chamber; 402, drain chamber; 410, end cap; 420, shell; 421, water inlet; 422, connecting port; 423, water outlet; 4231, water outlet connector; 4232, water inlet connector; 424, flushing port; 430, filter assembly; 431, connecting part; 432, central column; 433, conical part; 434, edge part; 435, water inlet; 4351, first water inlet; 4352, second water inlet; 440, drain motor; 450, impeller; 500, drain pipe; 600, drive motor; 700, water inlet pipe.

[0050] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0052] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0053] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to 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 invention based on the specific circumstances.

[0054] like Figures 1 to 5 As shown, an embodiment of the present invention provides a drain pump 400 for a washing device, and a washing device having the drain pump 400. The washing device can be a household appliance with a clothing washing function, such as a washing machine or a washer-dryer combo.

[0055] Specifically, in an embodiment of the present invention, the washing device includes a housing 100, within which an outer drum 210 and an inner drum 220 are coaxially arranged. The inner drum 220 is rotatably disposed inside the outer drum 210. A drive motor 600 is provided on the outer side of the bottom of the outer drum 210. The drive motor 600 is connected to the inner drum 220 via a shaft passing through the bottom of the outer drum 210, thereby driving the inner drum 220 to rotate during the operation of the washing device. The outer drum 210, the inner drum 220, the drive motor 600, and counterweights constitute an integral assembly, which is suspended inside the housing 100 by a suspension device (not shown in the figure).

[0056] In one specific embodiment, the washing equipment is a drum washing machine, with the axes of the outer drum 210 and the inner drum 220 arranged horizontally or substantially horizontally. A closable door 300 is installed on the front side of the casing 100. During operation, the outer drum 210 is filled with water and fixed in place, while the door 300 is closed to seal the opening of the outer drum 210. A drive motor 600 drives the inner drum 220 to rotate, thereby lifting the clothes inside the drum to a certain height before they fall, using the tumbling action of the falling clothes to achieve washing.

[0057] The washing equipment is equipped with a drain pipe 500. The inlet 421 of the drain pump 400 is connected to the outer drum 210. One end of the drain pipe 500 is connected to the outlet 423 of the drain pump 400, and the other end extends to the outside of the casing 100. When the drain pump 400 is running, the water in the outer drum 210 can be discharged from the washing equipment along the drain pipe 500.

[0058] Specifically, a portion of the drain pipe 500 extends upwards to a height higher than the highest water level inside the outer tub 210, and then extends downwards to ensure that the outer tub 210 can hold water normally. During normal washing, the water level cannot exceed the highest point of the drain pipe 500, so the water inside the outer tub 210 will not be drained away along the drain pipe 500. After the drain pump 400 is started, the water in the outer tub 210 flows towards the drain pipe 500 under the power of the drain pump 400, thus exceeding the highest point of the drain pipe 500 and emptying the water inside the outer tub 210.

[0059] Furthermore, the drain pump 400 includes a housing 420, inside which are a filter chamber 401, a connecting port 422, and a drain chamber 402 connected in sequence. The inlet 421 is located on the filter chamber 401, and the outlet 423 is located on the drain chamber 402. A filter assembly 430 is provided inside the filter chamber 401, and a rotatable impeller 450 is provided inside the drain chamber 402. The impeller 450 is connected to a drain motor 440 located outside the housing 420.

[0060] The aforementioned "sequential connection" refers to the process by which the drainage water flows into the drainage pump 400 and sequentially passes through the filter chamber 401, the connecting port 422, and the drainage chamber 402.

[0061] In one specific embodiment, the housing 420 has a certain extension length, and the filter chamber 401, the connecting port 422, and the drain chamber 402 are distributed along the length direction of the housing 420. The rotation axis of the impeller 450 is parallel to the axial direction of the housing 420, and the drain motor 440 is located on the outer side of the end wall of the housing 420 at the end where the drain chamber 402 is located. The inlet 421 is located on the side wall of the filter chamber 401, specifically in the middle region along the length direction of the filter chamber 401. The outlet 423 is located on the side wall of the drain chamber 402 and extends radially for a certain length to form an outlet connector 4231, which facilitates connection with the drain pipe 500.

[0062] When the drainage pump 400 is running, the drainage motor 440 drives the impeller 450 to rotate, drawing water from the filter chamber 401 to the drainage chamber 402. A negative pressure is generated in the filter chamber 401, drawing water from the outer cylinder 210 into the filter chamber 401 through the inlet 421. The water flow mixed with lint entering through the inlet 421 impacts the filter assembly 430 and then enters the drainage chamber 402. Due to the centrifugal force of the rotating impeller 450, it is thrown out through the outlet 423 and enters the drain pipe 500. During the process of water flowing from the filter chamber 401 to the drainage chamber 402, larger lint and foreign objects are intercepted by the filter assembly 430 and do not enter the drainage chamber 402. This prevents coarse lint and foreign objects from contacting the impeller 450, thus preventing problems that could affect the operation of the drainage pump 400.

[0063] More specifically, the end of the filter chamber 401 furthest from the drain chamber 402 is open and closed by an end cap 410. The filter assembly 430 is detachably installed inside the filter chamber 401. When a large amount of lint accumulates in the filter chamber 401 and affects the drainage efficiency, the user can open the end cap 410 to remove the filter assembly 430 from the open end of the filter chamber 401 for cleaning.

[0064] As a specific structure, the filter assembly 430 is connected to the end cap 410. When the user removes the end cap 410, the filter assembly 430 can be pulled out at the same time, making the operation more convenient.

[0065] During normal use of the washing equipment, coarse and long lint is produced in relatively small quantities; the water flow carries mostly short, small lint, which usually does not affect the rotation of the impeller 450. Therefore, the purpose of installing the filter assembly 430 in the filter chamber 401 is primarily to prevent coarse lint or other foreign objects from entering the drain chamber 402, while the aforementioned small lint is allowed to enter the drain chamber 402 and be discharged with the water flow.

[0066] In one specific embodiment, the filter assembly 430 has a water inlet 435 connected to the communication port 422, through which water flows from the filter chamber 401 to the drain chamber 402. The water inlet 435 has a small area, allowing water and small lint to pass through, but large lint and other foreign objects will be blocked and will not enter the drain chamber 402.

[0067] However, during normal drainage, water in filter chamber 401 is drawn into drainage chamber 402, creating a certain negative pressure within filter chamber 401. If large pieces of lint or other foreign objects are intercepted by the inlet 435, the impeller 450's rotation causes the intercepted lint or other foreign objects to be adsorbed at the inlet 435 and difficult to remove. Consequently, small pieces of lint in the water flow quickly accumulate around the large pieces, clogging the gap between the large pieces and the inlet 435. This prevents the small pieces of lint that should be discharged normally with the water flow from being discharged smoothly, leading to severe blockage of the entire drainage pump 400 and affecting drainage efficiency.

[0068] For washing machines with fault detection functions, if the drain pump 400 becomes clogged, it will cause a change in the power of the drain motor 440. The main control module of the washing machine will monitor the power of the drain motor 440 and, upon determining that a blockage has occurred, will stop the operation of the drain motor 440 and issue an alarm, thus affecting the normal washing process.

[0069] Specifically, during normal drainage, due to ample water volume, the impeller 450 needs to move a large volume of water, resulting in high rotational resistance and high power consumption of the drainage motor 440. However, when a blockage occurs, less water enters the drainage chamber 402, meaning the impeller 450 moves less water, reducing its rotational resistance and consequently lowering the power consumption of the drainage motor 440. Since the input voltage remains constant, the input current of the drainage motor 440 actually decreases. The main control module of the washing equipment can determine whether a blockage has occurred based on the changes in the operating parameters of the drainage motor 440.

[0070] During the operation of the drainage pump 400, the more severe the blockage, the greater the drainage resistance. Testing revealed that in practical applications, the drainage resistance F changes with time T as follows: Figure 6 As shown by curve c, the drainage resistance does not continuously increase over time, but may increase normally for a period of time before decreasing again. This initial increase followed by a decrease in drainage resistance may be due to the initial blockage of large lint particles, followed by the accumulation of smaller lint particles, causing an increase in drainage resistance. Later, vibrations in the washing equipment or changes in the type of laundry may cause some of the smaller lint particles to be dissipated, thus reducing the drainage resistance again. However, this decrease in drainage resistance is random and may quickly become blocked again, causing the drainage resistance to rise rapidly again as shown by curve c, reaching the drainage resistance threshold f1 that triggers an alarm. At this point, the user must manually clean the filter assembly 430 for the washing equipment to operate normally.

[0071] To address the aforementioned problems, embodiments of the present invention incorporate turbulent water flow within the filter chamber 401. This prevents coarse lint that could cause blockages from being stably adsorbed, thus preventing the accumulation of small lint around it. Small lint can then be carried away and discharged by the water flow at any time. The filter assembly 430 only intercepts coarse lint or other larger foreign objects. In this way, the drainage resistance F can be reduced as follows: Figure 6 As shown by curve d, the temperature fluctuates at a low level and is unlikely to rise to a level that triggers an alarm. This avoids the washing equipment malfunctioning due to an alarm, and also extends the interval between manual cleaning of the filter assembly 430 by the user.

[0072] Example 1

[0073] like Figures 1 to 3 As shown, this embodiment provides a drain pump 400 for a washing device and a washing device having the drain pump 400, based on the above, to solve the problem that the drain pump 400 is easily clogged and requires frequent cleaning by the user.

[0074] In this embodiment, the drainage pump 400 is equipped with a water-priming mechanism. During the drainage process, a portion of the water discharged from the outlet 423 of the drainage pump 400 can be introduced into the filter chamber 401 through the water-priming mechanism. This portion of water introduced into the filter chamber 401 acts as an agitator, preventing coarse lint from being stably sucked in. Consequently, small lint cannot accumulate around the coarse lint, effectively avoiding the problem of the drainage pump 400 being blocked too quickly.

[0075] Specifically, the outlet of the water-guiding mechanism is located between the inlet 421 and the connecting port 422, and during the drainage process, water continuously flows into the filter chamber 401 along the water-guiding mechanism. In this way, water flow disturbance can be formed between the inlet 421 and the connecting port 422, preventing large pieces of wire or foreign objects from remaining stably near the water inlet 435.

[0076] When the drain pump 400 is running, the impeller 450 rotates to draw water from the filter chamber 401 to the drain chamber 402, and sends the water in the drain chamber 402 into the drain pipe 500. Therefore, the outlet 423, the outlet connector 4231, and the drain pipe 500 are all under positive pressure, while the filter chamber 401 is under negative pressure.

[0077] In one specific implementation, the inlet end of the water-guiding mechanism is connected to the drain pipe. During the drainage process, the pressure difference between the drain pipe and the filter chamber drives a portion of the water in the drain pipe to flow into the filter chamber along the water-guiding mechanism.

[0078] In another specific embodiment, the inlet end of the water-guiding mechanism is connected to the outlet 423. In one specific structure, a protruding water-guiding connector 4232 is provided on the side wall of the outlet connector 4231, and the inlet end of the water-guiding mechanism is connected to the water-guiding connector 4232. During the drainage process, the pressure difference between the outlet connector 4231 and the filter chamber 401 drives a portion of the water flowing through the outlet connector 4231 into the filter chamber 401 along the water-guiding mechanism, while the majority of the remaining water flows along the outlet connector 4231 into the drain pipe 500, thereby being discharged from the washing equipment.

[0079] In the above scheme, the drain pipe 500 or the outlet connector 4231 and the filter chamber 401 are connected by the water diversion mechanism. Due to the pressure difference between the drain pipe 500 or the outlet connector 4231 and the filter chamber 401 during the drainage process, some water will flow back to the filter chamber 401 along the water diversion mechanism. No additional device is needed to provide power. The structure is simple and the modification cost is low.

[0080] During the drainage process, the aforementioned pressure difference persists, resulting in a continuous flow of water into the filter chamber 401 along the water inlet mechanism. This continuously agitates the water flow inside the filter chamber 401, preventing coarse lint from being absorbed. Consequently, it effectively prevents the accumulation of small lint around the coarse lint, thus extending the time required for cleaning by the user.

[0081] Furthermore, in this embodiment, the outlet end of the water-guiding mechanism and the inlet 421 of the drainage pump 400 are respectively disposed on the side wall of the filter chamber 401, and the two are staggered along the axial direction of the filter chamber 401. During the drainage process, the water flow entering the filter chamber 401 along the water-guiding mechanism can agitate the water flowing from the inlet 421 to the connecting port 422, avoiding the formation of a steady flow of water, thereby preventing coarse lint from lingering near the permeable port 435.

[0082] In a further embodiment, the communication port 422 is located at one end of the filter cavity 401 (i.e., Figure 2 (at the right end of the filter chamber 401), the outlet end of the water intake mechanism is located between the inlet 421 and the connecting port 422 along the axial direction of the filter chamber 401.

[0083] In one specific embodiment, a flushing port 424 for connecting the water-drawing mechanism is provided on the side wall of the filter chamber 401. The water-drawing mechanism includes a water-drawing pipe 700, one end of which is connected to a water-drawing connector 4232 on the side wall of the water outlet connector 4231, and the other end is connected to the flushing port 424.

[0084] In this embodiment, the flushing port 424 is disposed on the side wall of the filter chamber 401, located between the inlet 421 and the connecting port 422 along the axial direction of the filter chamber 401. Specifically, the coverage areas of the flushing port 424 and the inlet 421 in the axial direction of the filter chamber 401 do not overlap. The water flow entering the filter chamber 401 along the water inlet pipe 700 can agitate the water near the connecting port 422, thus better preventing coarse lint from remaining and small lint from accumulating.

[0085] The projection positions of the flushing port 424 and the inlet port 421 onto the same cross-section of the filter chamber 401 can coincide or fall at different positions on the outer periphery of the cross-section. Both can achieve the purpose of agitating the water flow and preventing the lint from staying and accumulating.

[0086] In a further embodiment, the filter structure of the filter assembly 430 is located in the filter chamber 401 near the connection port 422, and the water outlet of the water inlet mechanism, which is also the water outlet of the water inlet pipe 700, is located near the filter structure.

[0087] In the above scheme, during normal drainage, the filter structure of the filter assembly 430 intercepts coarse lint and other foreign objects in the water flow. Therefore, the coarse lint and foreign objects are relatively concentrated near the filter structure. By placing the outlet end of the water inlet pipe 700 close to the filter structure, when the water flows out of the water inlet pipe 700, it can directly impact the coarse lint or create a turbulent water flow around the coarse lint, preventing the coarse lint from being stably sucked in, thereby avoiding the problem of the filter structure being blocked.

[0088] In one specific implementation, the opening direction of the flushing port 424 is perpendicular to the side wall of the filter chamber 401, and the outlet end of the water inlet pipe 700 is installed at the flushing port 424, so that the water flowing into the filter chamber 401 along the water inlet pipe 700 is also basically perpendicular to the side wall of the filter chamber 401, which can directly flush the water flowing from the inlet port 421 to the filter structure and the connecting port 422, with a large impact force and good agitation effect.

[0089] It should be noted that, in the embodiments of the present invention, the "opening direction of the flushing port 424" refers to the opening direction of the flushing port 424 on one side of the inner wall of the filter chamber 401.

[0090] In one specific structure of this embodiment, the housing 420 of the drain pump 400 has a cylindrical structure, and the sidewall of the filter chamber 401 has a cylindrical surface structure. The opening direction of the flushing port 424 is radially directed towards the axis of the filter chamber 401, and the water outlet area of ​​the water inlet pipe 700 is inserted radially into the flushing port 424 along the filter chamber 401.

[0091] In another specific implementation, the opening direction of the flushing port can also be set at a certain angle to the normal of the filter chamber sidewall. In one specific structure, when the sidewall of the filter chamber is a cylindrical surface, the opening direction of the flushing port is perpendicular to the axial direction of the filter chamber and at a certain angle to the radial direction of the filter chamber. The water outlet area of ​​the water inlet pipe is inserted into the flushing port, so that the water outlet direction of the water inlet pipe is basically consistent with the opening direction of the flushing port.

[0092] In the preferred configuration, the opening direction of the flushing port is basically along the circumferential tangent direction of the side wall of the filter chamber, and the water outlet area of ​​the water inlet pipe is inserted into the flushing port along the tangent direction.

[0093] With the above structure, the water flowing from the inlet to the connecting port flows almost along the axial direction of the filter chamber in the area near the connecting port. The water entering the filter chamber along the water inlet pipe can drive the water flow to generate a certain rotational tendency, so that coarse lint cannot stay stably and prevent blockage.

[0094] In one specific embodiment of this example, the filter structure of the filter assembly 430 includes a conical portion 433, which extends from the connecting port 422 into the filter cavity 401 and gradually decreases in inner diameter. A water inlet 435 for water passage is included in the filter structure, formed at the extended end of the conical portion 433 (i.e., Figure 2 The first permeable outlet 4351 at the left end of the middle.

[0095] In a more specific structure, the filter assembly 430 is provided with a central column 432 extending along the axis of the filter chamber 401. One end of the central column 432 is inserted into the extended end of the conical portion 433 with a gap. At the extended end of the conical portion 433, the gap between the outer periphery of the central column 432 and the inner wall of the conical portion 433 forms a first water inlet 4351.

[0096] In one detailed structure, the other end of the central post 432 is connected to the end cap 410. The large-diameter end of the tapered portion 433 (i.e. Figure 2 The outer periphery of the right end of the filter chamber 401 is provided with an outwardly extending edge portion 434, which supports the tapered portion 433 at the left end of the communication port 422. The edge portion 434 is connected to the end cap 410 through a connecting portion 431 extending axially along the filter chamber 401, so that the filter assembly 430 is connected to the end cap 410 as a whole, and can be removed from the filter chamber 401 along with the end cap 410.

[0097] Among them, two or more connecting parts 431 are arranged at intervals along the circumference, so as not to affect the flow of drainage water entering through the inlet 421 to the central axis area of ​​the filter chamber 401, and to enter the connecting port 422 through the first water inlet 4351.

[0098] As a specific structure, such as Figure 2 and Figure 3 As shown, two connecting parts 431 are symmetrically arranged.

[0099] With the above structure, during drainage, water in the filter chamber 401 enters the connecting port 422 through the first perforation port 4351, and then enters the drainage chamber 402. Under the action of the impeller 450 rotating, it is discharged from the outlet 423. Small lint carried in the water can pass through the first perforation port 4351 and be discharged with the drainage water. Larger lint and other possible foreign objects in the water cannot pass through the first perforation port 4351 and are thus intercepted in the filter chamber 401.

[0100] During drainage, the suction force generated by the rotation of the impeller 450 will attract large lint to the left end face of the conical part 433, causing small lint to accumulate on the left side of the large lint, gradually clogging the drainage pump 400. By setting up the water inlet pipe 700, water flow can be generated in the filter chamber 401 to agitate the water, preventing the large lint from being stably attracted, thus ensuring that the small lint can pass smoothly through the first water inlet 4351, reducing the frequency of clogging of the drainage pump 400.

[0101] In the embodiment where the opening direction of the flushing port 424 is basically perpendicular to the side wall of the filter chamber 401, the flushing port 424 is positioned facing the side wall of the conical portion 433, and the water inlet pipe 700 is inserted into the flushing port 424, with the water outlet direction also facing the side wall of the conical portion 433. In this way, the water flowing out from the water inlet pipe 700 can impact the side wall of the conical portion 433 and flow along the side wall of the conical portion 433 to its left end, thus flushing away the coarse lint remaining at the first permeable port 4351 and preventing blockage.

[0102] In another specific implementation, the flushing port is located near the left end of the conical part, and the water inlet pipe is inserted into the flushing hole, so that water can flow out towards the left end of the conical part, directly impacting the coarse lint adsorbed at the first water inlet, so that the coarse lint cannot stay stably, thereby achieving the purpose of preventing blockage.

[0103] In a more specific structure, two or more flushing inlets can be set, distributed at intervals around the central column on the side wall of the filter chamber. Multiple water streams simultaneously impact the central axis, making the water flow near the first flushing inlet more irregular, preventing coarse lint from accumulating and obstructing the first flushing inlet.

[0104] Furthermore, the water inlet 435 on the filter assembly 430 also includes a second water inlet 4352 disposed on the outer periphery of the conical portion 433. Specifically, the right end of the filter assembly 430 is inserted into the connecting port 422, the edge portion 434 is substantially in contact with the inner wall of the connecting port 422, and a plurality of second water inlets 4352 are provided circumferentially between the edge portion 434 and the outer wall of the conical portion 433.

[0105] To accommodate the installation of the filter assembly 430, the inner diameter of the connection port 422 is smaller than the inner diameter of the filter chamber 401.

[0106] During drainage, water and small wire debris can also enter the connecting port 422 from the second permeable port 4352, while large wire debris and other foreign objects are intercepted on the left side of the second permeable port 4352. The suction force generated by the rotation of the impeller 450 will also attract large wire debris near the second permeable port 4352, especially in the area where the connecting part 431 is located. Since the distance between the connecting part 431 and the outer wall of the conical part 433 gradually decreases towards the second permeable port 4352, it is easier for large wire debris to accumulate and get stuck.

[0107] To address the aforementioned issues, this embodiment employs a structure where the flushing inlet 424 faces the sidewall of the conical portion 433. The water flow entering the filter chamber 401 via the water inlet pipe 700 impacts the sidewall of the conical portion 433, generating water agitation in the outer peripheral region of the conical portion 433. Consequently, coarse lint accumulating near the first and second permeable inlets 4351 and 4352 is affected by the agitated water flow, preventing it from remaining stably and causing blockages in both inlet 4351 and 4352.

[0108] In a further embodiment, the water inlet pipe 700 extends a certain length into the filter chamber 401 through the flushing port 424. This places the outlet of the water inlet pipe 700 closer to the filter assembly 430 inside the filter chamber 401, resulting in greater impact force when the water flowing from the water inlet pipe 700 contacts the filter assembly 430. This more effectively disperses accumulated lint and improves the clogging prevention effect on the drain pump 400.

[0109] In one specific embodiment, the water inlet pipe 700 is a rigid pipe that extends into the filter assembly 430 after passing through the flush port 424. In a preferred embodiment, the water inlet pipe 700 extends into the side wall of the tapered portion 433 after passing through the flush port 424.

[0110] Using the above scheme, the water flows out of the water inlet pipe 700 and directly hits the conical part 433 of the filter component 430, resulting in a greater impact force. This can generate a strong water flow agitation in the outer peripheral area of ​​the conical part 433, effectively preventing the drain pump 400 from becoming clogged.

[0111] As another specific implementation, the water inlet pipe 700 is a flexible hose, or at least the portion of it extending into the filter chamber 401 is made of a flexible material.

[0112] Using the above scheme, when water flows into the filter chamber 401 along the water inlet pipe 700, especially when there is a relatively rapid water flow in the water inlet pipe 700, the part of the water inlet pipe 700 located inside the filter chamber 401 will also produce irregular oscillation while spraying water outward. In turn, the oscillation of the water inlet pipe 700 will further enhance the stirring effect on the water flow in the filter chamber 401, so that the water flow from the inlet 421 to the connecting port 422 flows in an irregular shape, reducing the probability that coarse lint will be adsorbed and remain at the water inlet 435.

[0113] In a preferred embodiment, there is a certain gap between the filter assembly 430 and the flushing port 424, and the length of the water pipe 700 extending into the filter chamber 401 is greater than the gap between the flushing port 424 and the filter assembly 430.

[0114] In the detailed structure, the flushing port 424 is positioned facing one of the connection portions 431 of the filter assembly 430, and the length of the water pipe 700 extending into the filter chamber 401 is greater than the distance from the outer surface of the connection portion 431 to the inner wall of the filter chamber 401 where the flushing port 424 is located.

[0115] When water flows into the filter chamber 401 along the water inlet pipe 700, the part of the water inlet pipe 700 located inside the filter chamber 401 is driven by the water flow to produce irregular swings, which will randomly hit the filter assembly 430, causing the filter assembly 430 to be hit and produce a certain amplitude of vibration, so that the coarse lint cannot stay stably near the first water inlet 4351 and the second water inlet 4352.

[0116] In one specific embodiment, the outer wall of the filter chamber 401 has a boss structure on the outer periphery of the flushing port 424, and the side wall of the water inlet pipe 700 is provided with a stop portion protruding outward. When the water inlet pipe 700 passes through the flushing port 424, the stop portion abuts against the boss structure, thereby fixing the length of the water inlet pipe 700 extending into the filter chamber 401 and preventing the water inlet pipe 700 from extending too far and getting tangled on the filter assembly 430 when it swings irregularly due to the water flow.

[0117] The washing equipment provided in this embodiment has the drain pump 400 described above. During the drainage process, the drain motor 440 is started, which drives the impeller 450 to rotate in the drain chamber 402, thereby drawing water from the outer drum 210 into the drain pump 400, and then the water is discharged into the drain pipe 500 by the drain pump 400, and finally discharged from the washing equipment along the drain pipe 500.

[0118] During drainage, coarse lint and any foreign objects carried in the water cannot pass through the first water inlet 4351 and the second water inlet 4352 of the filter assembly 430, while small lint can pass through the first water inlet 4351 and the second water inlet 4352. Thus, coarse lint and foreign objects can be collected in the filter assembly 430, and small lint can be discharged with the water flow under normal circumstances.

[0119] As the impeller 450 rotates, it draws water from the filter chamber 401 to the drain chamber 402 and sends the drain water through the outlet connector 4231 into the drain pipe 500, creating a pressure difference between the filter chamber 401 and the outlet connector 4231. One end of the water inlet pipe 700 is connected to the water inlet connector 4232, and the other end extends into the filter chamber 401 through the flushing port 424 on the side wall of the filter chamber 401. This creates a different water pressure environment at both ends of the water inlet pipe 700, and under the drive of the pressure difference, some of the water discharged along the outlet connector 4231 will enter the water inlet pipe 700 and flow back into the filter chamber 401.

[0120] The water flowing back along the water inlet pipe 700 can agitate the water flow from the inlet 421 to the connecting port 422 within the filter chamber 401, preventing coarse lint from adhering near the first and second permeable ports 4351 and 4352, thus preventing the accumulation of small lint and clogging of the drain pump 400. When the water inlet pipe 700 is a flexible hose, the water flow spraying out from the water inlet pipe 700 can also cause the water inlet pipe 700 to swing irregularly, further enhancing the agitation effect on the water flow. When the portion of the water inlet pipe 700 extending into the filter chamber 401 is long enough, it can also vibrate the filter assembly 430, further preventing coarse lint from remaining stably.

[0121] The above solution effectively avoids the problem of large lint accumulating and blocking small lint, which could lead to rapid blockage of the drain pump 400. Large lint cannot remain stably in place and will not obstruct the first and second inlets 4351 and 4352, thus ensuring that small lint can be smoothly discharged with the water flow. This ensures that the filter assembly 430 primarily collects only large lint and other potentially present foreign objects.

[0122] Furthermore, in this embodiment, the diameter of the water inlet pipe 700 is much smaller than the cross-sectional diameter of the water outlet connector 4231, ensuring that the amount of water flowing back along the water inlet pipe 700 is less than the total amount of water discharged by the drainage pump 400 through the outlet 423. Thus, most of the drainage water can enter the drainage pipe 500 and be discharged normally, with only a small portion flowing back to the filter chamber 401 to agitate the water in the filter chamber 401, essentially not affecting the normal drainage efficiency. Moreover, during long-term use, because the drainage pump 400 in this embodiment can maintain unobstructed drainage for extended periods, the frequency of clogging of the drainage pump 400 is reduced, and the overall drainage efficiency throughout its lifespan is improved.

[0123] The drainage resistance F of the drainage pump 400 in this embodiment changes over time during use as shown in the curve below. Figure 6 As shown by curve d, the level can fluctuate at a low level over a longer period of use, and it is unlikely to rise to a level that would trigger a blockage alarm. By extending the time that the drain pump 400 is blocked, the frequency of manual cleaning by the user is reduced, thus improving the user experience.

[0124] Example 2

[0125] like Figure 1 , Figure 4 and Figure 5 As shown, this embodiment provides a drain pump 400 for a washing device, and a washing device having the drain pump 400. Specifically, the difference between this embodiment and the first embodiment described above is that the outlet end of the water inlet pipe 700 is connected to the flushing port 424 and does not extend into the filter chamber 401.

[0126] In one specific embodiment, a protruding connector is provided on the outer wall of the filter chamber 401 corresponding to the flushing port 424, and the outlet end of the water inlet pipe 700 is sleeved on the connector. Water flowing back along the water inlet pipe 700 enters the connector and flows into the filter chamber 401 along the flushing port 424.

[0127] In another specific implementation, the water outlet of the water inlet pipe 700 is inserted into the flushing port 424, with its end face flush with the inner wall of the filter chamber 401 or located inside the flushing port 424.

[0128] In this embodiment, the spray direction of water entering the filter chamber 401 is controlled by adjusting the opening direction of the flushing port 424, thereby achieving the purpose of agitating the water flow inside the filter chamber 401.

[0129] Specifically, in this embodiment, the flushing port 424 is disposed between the water inlet 421 and the filter structure of the filter assembly 430, and the opening direction of the flushing port 424 is at a certain angle to the normal of the side wall of the filter chamber 401.

[0130] More specifically, for the structure where the sidewall of the filter chamber 401 is cylindrical, the opening direction of the flushing port 424 is perpendicular to the axial direction of the filter chamber 401 and forms a certain angle with the radial direction of the filter chamber 401.

[0131] With the above structure, when the water flows back to the filter chamber 401 along the water inlet pipe 700, it will adhere to the inner wall of the filter chamber 401, or enter the filter chamber 401 at a certain angle to the inner wall of the filter chamber 401. This can cause the water flowing from the water inlet 421 to the filter structure of the filter assembly 430 in the filter chamber 401 to have a flow tendency to rotate around the axis of the filter chamber 401, thereby preventing large lint or foreign objects from staying stably near the water inlet 435 on the filter structure and avoiding blockage of the drain pump 400.

[0132] In the preferred configuration, the opening direction of the flushing port 424 is along the tangent direction of the inner surface of the side wall of the filter chamber 401, that is, along the circumferential direction of the cross-section of the filter chamber 401. In this way, after the water flow in the water inlet pipe 700 passes through the flushing port 424, it will enter the filter chamber 401 in a direction that basically fits the inner wall of the filter chamber 401, thus improving the effect of rotating the water flow.

[0133] In a preferred embodiment, two or more flushing ports 424 are spaced apart circumferentially along the same cross-section of the filter chamber 401. The opening direction of each flushing port 424 is simultaneously arranged clockwise or counterclockwise relative to its cross-section. During drainage, water can simultaneously enter the filter chamber 401 through each flushing port 424, and the water flow entering through each flushing port 424 can drive the water in the filter chamber 401 to rotate in the same direction. This results in a stronger rotational force and a more pronounced agitation effect, thus better preventing the retention of coarse lint.

[0134] To enable simultaneous water intake into the filter chamber 401 from two or more flushing outlets 424, in one specific embodiment, two or more water inlet pipes 700 are provided according to the number of flushing outlets 424, thus connecting to each flushing outlet 424 in a one-to-one correspondence. Correspondingly, a corresponding number of water inlet connectors 4232 are provided on the water outlet connector 4231 for connecting to each water inlet pipe 700 in a one-to-one correspondence.

[0135] In another specific implementation, the water inlet pipe 700 has a diversion structure, through which one water inlet end is simultaneously connected to two or more water outlet ends. Specifically, the water inlet pipe 700 is provided with two or more parallel water outlet ends according to the number of flushing ports 424, and each water outlet end is connected to a flushing port 424 in a one-to-one correspondence. In the above structure, only one water inlet connector 4232 needs to be provided on the water outlet connector 4231.

[0136] In this embodiment, the specific structure of the filter component 430 is the same as that in Embodiment 1 above, and will not be described again here.

[0137] In a further embodiment, the first water inlet 4351 and the water inlet 421 are spaced apart along the axial direction of the filter chamber 401, and the flushing outlet 424 is arranged along the axial direction of the filter chamber 401 between the water inlet 421 and the first water inlet 4351.

[0138] More specifically, two or more flushing inlets 424 are provided, and are distributed at intervals around the central column 432 in the area on the side wall of the filter chamber 401 relative to the left of the first water inlet 4351.

[0139] In the above scheme, the water flowing along the water inlet pipe 700 enters the filter chamber 401 through the flushing port 424, which can form a significant rotating water flow in the left end area of ​​the cone-shaped part 433. This prevents the coarse lint adsorbed at the first water inlet 4351 from staying stably, thus keeping the first water inlet 4351 unobstructed. Small lint can pass through and be discharged smoothly without accumulating and causing the drain pump 400 to become blocked.

[0140] In another further embodiment, the flushing inlet can be positioned corresponding to the side wall of the conical section. This creates a rotating water flow around the outer periphery of the conical section, agitating the water flow near the second perforator and dispersing any large pieces of lint adhering to it, thus preventing blockage.

[0141] In a preferred embodiment, at least two rings of flushing nozzles can be spaced at intervals along the axial direction of the filter chamber in the area between the inlet and the connecting port, with each ring of flushing nozzles driving the water flow in the same direction. This creates multiple rotating water flows within the length of the conical section, effectively preventing the accumulation of coarse lint.

[0142] In this embodiment, the diameter of the water inlet pipe 700 can be much smaller than the cross-sectional diameter of the outlet connector 4231, ensuring that the amount of water flowing back along the water inlet pipe 700 is less than the total amount of water discharged by the drainage pump 400 through the outlet 423, thus avoiding affecting normal drainage efficiency. It should be noted that for a scheme where multiple water inlet pipes 700 are connected one-to-one to the flushing outlet 424, the aforementioned "diameter of the water inlet pipe 700 is much smaller than the cross-sectional diameter of the outlet connector 4231" requires ensuring that the total cross-sectional area of ​​the multiple water inlet pipes 700 is less than or equal to the cross-sectional area of ​​the outlet connector 4231.

[0143] The washing equipment provided in this embodiment has the drain pump 400 described above. During the drainage process, the drain motor 440 is started, which drives the impeller 450 to rotate in the drain chamber 402, thereby drawing water from the outer drum 210 into the drain pump 400, and then the water is discharged into the drain pipe 500 by the drain pump 400, and finally discharged from the washing equipment along the drain pipe 500.

[0144] During drainage, coarse lint and any foreign objects carried in the water cannot pass through the first water inlet 4351 and the second water inlet 4352 of the filter assembly 430, while small lint can pass through the first water inlet 4351 and the second water inlet 4352. Thus, coarse lint and foreign objects can be collected in the filter assembly 430, and small lint can be discharged with the water flow under normal circumstances.

[0145] As the impeller 450 rotates, it draws water from the filter chamber 401 to the drain chamber 402, and sends the drained water through the outlet connector 4231 into the drain pipe 500, creating a pressure difference between the filter chamber 401 and the outlet connector 4231. One end of the water inlet pipe 700 is connected to the water inlet connector 4232, which is connected to the flushing port 424 on the side wall of the filter chamber 401. This creates a difference in water pressure at both ends of the water inlet pipe 700, and under the drive of the pressure difference, some of the water discharged along the outlet connector 4231 will enter the water inlet pipe 700 and flow back into the filter chamber 401.

[0146] The opening direction of the flushing port 424 is basically tangential to the circumference of the inner surface of the side wall of the filter chamber 401. Water flowing back along the water inlet pipe 700 passes through the flushing port 424 and enters the filter chamber 401 close to the inner surface of the side wall. In particular, when multiple flushing ports 424 are arranged circumferentially, it can effectively drive the water flowing from the inlet 421 to the connecting port 422 to rotate around the axis of the filter chamber 401, achieving a stirring effect. This can further cause coarse lint intercepted by the first and second permeable ports 4351 to rotate with the water flow, instead of remaining stably at the first and second permeable ports 4351 and 4352.

[0147] The above solution effectively avoids the problem of large lint accumulating and blocking small lint, which could lead to rapid blockage of the drain pump 400. The large lint rotates with the water flow instead of remaining stationary, thus preventing it from blocking the first and second inlets 4351 and 4352. This ensures that small lint can be smoothly discharged with the water flow, so that the filter assembly 430 primarily collects only large lint and other potentially present foreign objects.

[0148] The drainage resistance F of the drainage pump 400 in this embodiment changes over time during use as shown in the curve below. Figure 6 As shown by curve d, the level can fluctuate at a low level over a longer period of use, and it is unlikely to rise to a level that would trigger a blockage alarm. By extending the time that the drain pump 400 is blocked, the frequency of manual cleaning by the user is reduced, thus improving the user experience.

[0149] In a further embodiment, the structure of the drainage pump 400 can also be used in combination with the scheme of Embodiment 1.

[0150] In one specific embodiment, a first flushing port is provided along the axial direction of the filter chamber, between the inlet and the first permeable port, with its opening direction substantially tangential to the sidewall of the filter chamber. A water inlet pipe is provided directly connected to the first flushing port. Simultaneously, a second flushing hole is provided facing the sidewall of the conical portion. The opening direction of the second flushing hole is substantially perpendicular to the sidewall of the filter chamber, and a water inlet pipe is provided extending into the filter chamber through the second flushing hole.

[0151] When the washing equipment drains, the water flowing into the first flush inlet creates a rotating and agitated flow around the first perforation, dispersing large lint particles near the first perforation and preventing it from becoming clogged. The water inlet pipe passing through the second flush inlet guides the water flow to impact the sidewall of the conical section. Simultaneously, its irregular oscillation agitates the water around the outer edge of the conical section, or vibrates the filter assembly, thus agitating the water flow near both the first and second perforations, preventing large lint particles from easily accumulating near them.

[0152] In this way, neither the first nor the second water inlet will be blocked by large pieces of lint, and small pieces of lint will not accumulate near the first and second water inlets. Instead, they can pass smoothly through the first and second water inlets with the water flow and be discharged from the drainage pump. This solution effectively extends the cycle of the drainage pump becoming clogged and reduces the frequency of manual cleaning by the user.

[0153] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A drain pump for a washing machine, characterized in that, It has a filter chamber (401), a connecting port (422) and a drain chamber (402) connected in sequence, and the filter chamber (401) is provided with a water inlet (421); The drainage pump (400) is equipped with a water intake mechanism. The water outlet of the water intake mechanism is located between the water inlet (421) and the connecting port (422). During the drainage process, part of the water discharged by the drainage pump (400) is introduced into the filter chamber (401) to agitate the water in the filter chamber (401).

2. The drain pump of the washing equipment according to claim 1, characterized in that, The water outlet and the water inlet (421) of the water-guiding mechanism are respectively disposed on the side wall of the filter chamber (401), and the water outlet and the water inlet (421) of the water-guiding mechanism are staggered along the axial direction of the filter chamber (401). Preferably, the water flow entering the filter chamber (401) along the water guiding mechanism agitates the water flowing from the inlet (421) to the connecting port (422); Preferably, during the drainage process, a portion of the water discharged by the drainage pump (400) driven by the pressure difference enters the filter chamber (401) along the water intake mechanism.

3. The drain pump of the washing equipment according to claim 2, characterized in that, The communication port (422) is located at one end of the filter chamber (401); The filter chamber (401) is provided with a filter assembly (430) having a filter structure, and the filter structure is located in the area near the communication port (422); the water outlet of the water intake mechanism is located near the filter structure. Preferably, the filter chamber (401) is provided with a flushing port (424) on its side wall; the water intake mechanism includes a water intake pipe (700) with one end connected to the outlet (423) of the drain pump (400) and the other end connected to the flushing port (424); The opening direction of the flushing port (424) is perpendicular to the side wall of the filter chamber (401), or at a certain angle to the normal of the side wall of the filter chamber (401).

4. The drain pump of the washing equipment according to claim 3, characterized in that, The filter structure includes a tapered portion (433) extending from the communication port (422) into the filter chamber (401) with a gradually decreasing inner diameter, and a first water inlet (4351) communicating with the communication port (422) at the extended end of the tapered portion (433). The flushing port (424) is disposed facing the side wall of the conical portion (433) or near the extended end of the conical portion (433); Preferably, the filter assembly (430) is provided with a central column (432) extending along the axis of the filter chamber (401), one end of the central column (432) being inserted into the extended end of the conical portion (433) with a gap, and the first water inlet (4351) is formed between the outer periphery of the central column (432) and the inner wall of the conical portion (433); At least two flushing inlets (424) are arranged at intervals around the central column (432).

5. The drain pump of the washing equipment according to claim 3 or 4, characterized in that, The water inlet pipe (700) passes through the flushing port (424) and extends a certain length into the filter chamber (401); Preferably, the water inlet pipe (700) passes through the flushing port (424) and extends toward the filter assembly (430); More preferably, the water inlet pipe (700) extends toward the sidewall of the tapered portion (433) of the filter assembly (430).

6. The drain pump of the washing equipment according to claim 5, characterized in that, The portion of the water inlet pipe (700) that extends into the filter chamber (401) is made of a flexible material; Preferably, the filter assembly (430) and the flushing port (424) are spaced apart; the length of the water pipe (700) extending into the filter chamber (401) is greater than the distance between the flushing port (424) and the filter assembly (430).

7. The drain pump of the washing equipment according to claim 3 or 4, characterized in that, The flushing port (424) is located between the water inlet (421) and the filter structure, and the outlet end of the water pipe (700) is connected to the flushing port (424); Preferably, the opening direction of the flushing port (424) is arranged along the tangential direction of the side wall of the filter chamber (401).

8. The drain pump of the washing equipment according to claim 7, characterized in that, The filter assembly (430) has a tapered portion (433) extending from the communication port (422) into the filter chamber (401) with a gradually decreasing inner diameter, and a first water inlet (4351) is provided at the extended end of the tapered portion (433). The first water inlet (4351) and the water inlet (421) are spaced apart along the axial direction of the filter chamber (401), and the flushing inlet (424) is located between the water inlet (421) and the first water inlet (4351) along the axial direction of the filter chamber (401).

9. The drain pump of the washing equipment according to claim 7 or 8, characterized in that, At least two flushing ports (424) are arranged at circumferential intervals along the filter chamber (401), and the opening direction of each flushing port (424) is either clockwise or counterclockwise. At least two water inlet pipes (700) are provided, each corresponding to one of the flushing outlets (424); or, the water inlet pipes (700) have at least two outlet ends that are corresponding to one of the flushing outlets (424).

10. A washing device, characterized in that, It has a drain pump for the washing equipment as described in any one of claims 1-9; Preferably, during the drainage process, the drainage water flows sequentially through the filter chamber (401), the connecting port (422), and the drainage chamber (402) before being discharged from the drainage pump (400). Part of the water discharged by the drainage pump (400) flows back to the filter chamber (401) along the water diversion mechanism. The amount of water flowing back along the water intake mechanism is less than the amount of water discharged by the drainage pump (400).

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