Filter for drainage pump, drainage pump and clothes treatment equipment

Abstract

The utility model relates to the technical field of clothes processing equipment, and aims to solve the problem of poor filtering performance of the existing draining pump filter. The utility model provides a filter for a draining pump, the filter can be accommodated in a pump shell of the draining pump to form a filter cavity, the filter comprises two end parts and a side support connected with the two end parts, and the filter also comprises a plurality of spoilers connected to the side support, and the plurality of spoilers are arranged in a staggered manner along the axis direction of the filter, so that a flow channel which extends in a snake shape along the axis direction is constructed in the filter cavity. The filter provided by the utility model not only can successfully intercept hard foreign matters and avoid damage to an impeller, but also can smoothly discharge line scraps and other foreign matters without causing blockage, thereby ensuring that the performance curve of the drainage pump does not deviate, reducing the failure rate of the drainage pump, avoiding the trouble of frequent manual cleaning by a user, and improving the working efficiency of the drainage pump. And the user experience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of clothing processing equipment, and specifically provides a filter for a drainage pump, a drainage pump, and clothing processing equipment. Background Art

[0002] Washing machines have become one of the essential household appliances in every household. Taking drum washing machines as an example, many of them adopt an upper drainage structure, so dirty water needs to be discharged through a drainage pump during the washing process. In actual use, some foreign objects may remain in the clothes put into the drum, such as button batteries, coins, building blocks, etc. These hard foreign objects can easily damage the impeller when passing through the drainage pump, thus affecting the normal operation of the washing machine.

[0003] To avoid this problem, existing products often install filters at the water inlet of the drainage pump. Conventional filters have two main filtering methods: by setting cylinders and bosses, larger foreign objects can be blocked from passing through, but some small foreign objects cannot be filtered; the other is by setting small filter holes, which can block both large and small foreign objects. However, since each hole is too small, wire scraps, hair, etc. are easily trapped and accumulated on the surface of the filter hole, causing the filter hole to be blocked. Over time, the degree of blockage increases, resulting in increased flow resistance, which seriously affects the performance curve of the drainage pump and may even cause drainage failure.

[0004] Accordingly, the art needs a new filter to solve the above problems. Utility Model Content

[0005] The utility model aims to solve the above technical problem, that is, at least solve the problem of poor filtering performance of the existing drainage pump filter.

[0006] In a first aspect, the utility model provides a filter for a drainage pump, characterized in that the filter can be accommodated in a pump casing of the drainage pump and thus construct a filter chamber, the filter includes two ends, and a side support connecting the two ends, the filter also includes a plurality of spoilers connected to the side supports, the plurality of spoilers are staggeredly arranged along the axial direction of the filter to construct a flow channel extending serpentinely along the axial direction in the filter chamber.

[0007] In some feasible embodiments of the filter for a drainage pump, the spoiler has a first edge that is in contact with the inner wall of the filter cavity in an installed state, and a second edge that is separated from the inner wall, and a flow area is formed between the second edge and the inner wall of the filter cavity for fluid to pass through.

[0008] Wherein, the first edge is in the shape of a major arc or a semicircle; and / or

[0009] The second edge is a straight line or a curved line.

[0010] In some feasible embodiments of the above-mentioned filter for a drainage pump, one of the ends is provided with a filter outlet connected to the filter cavity, and a flow area of ​​the filter outlet is the same as or close to a flow area corresponding to the flow zone.

[0011] In some feasible implementations of the filter for a drainage pump, the plurality of spoilers have the same shape; or

[0012] At least two spoilers among the plurality of spoilers have different shapes.

[0013] In some feasible implementations of the above-mentioned filter for a drainage pump, the number of the spoilers is greater than or equal to two.

[0014] In some feasible implementations of the above-mentioned filter for a drainage pump, the surface of the spoiler used to construct the inlet section of the flow channel is a curved surface, so that the flow cross-sectional area of ​​the inlet section of the flow channel gradually decreases.

[0015] In some feasible implementations of the above-mentioned filter for a drainage pump, the filter further includes a side wall portion, and the side wall portion covers a portion of the side support and the spoiler.

[0016] In some feasible implementations of the above-mentioned filter for a drainage pump, the spoiler is plug-connected with the side support or is formed in one piece.

[0017] In a second aspect, the utility model further provides a drainage pump, which includes the filter for the drainage pump as described in any of the aforementioned technical solutions.

[0018] In a third aspect, the utility model further provides a clothing processing device, which includes the drainage pump described in any of the aforementioned technical solutions.

[0019] The filter provided by the utility model arranges multiple spoilers on the side supports of the filter in a staggered arrangement, so that after the filter is inserted into the pump casing of the drainage pump, it can construct a filter chamber with a serpentine flow channel with the help of the inner wall of the pump casing, and intercept larger and smaller foreign objects with the help of the bends in the flow channel, while the structure does not have the ability to intercept soft lint, hair, etc., so that lint, hair, etc. can pass through and be discharged smoothly. In this way, hard foreign objects are successfully intercepted to avoid damage to the impeller, and lint-like foreign objects can be discharged smoothly without causing blockage, thereby ensuring that the performance curve of the drainage pump will not be offset, reducing the failure rate of the drainage pump, and saving users the trouble of frequent manual cleaning, thereby improving user experience.

[0020] Those skilled in the art will appreciate that, since the drainage pump and clothing processing device are equipped with the filter described in any of the aforementioned technical solutions, they possess all the technical effects that can be obtained by the aforementioned filters, which will not be elaborated herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0022] Figure 1 A partial structural schematic diagram of a drainage pump provided in an embodiment of the utility model;

[0023] Figure 2 An isometric view of a filter element provided in Example 1 of the utility model;

[0024] Figure 3 A schematic longitudinal cross-sectional view of a filter element provided in Example 1 of the utility model;

[0025] Figure 4 An isometric view of a filter element provided in Example 2 of the utility model;

[0026] List of reference numerals:

[0027] 1. Drainage pump;

[0028] 10. Pump casing; 101. Pump casing mounting portion; 102. Housing portion; 103. Impeller mounting portion; 104. Water inlet; 105. First drain outlet; 106. Second drain outlet; 107. Inner wall;

[0029] 20. Filter; 201. Upper end; 202. Lower end; 203. Side support; 204. Spoiler group; 2041. First spoiler; 2042. Second spoiler; 2043. Third spoiler; 2044. First edge; 2045. Second edge; 205. Side wall; 206. Flow channel; 2061. Inlet section; 2062. Middle section; 2063. Outlet section; 2064. Flow zone; 207. Filter outlet; 208. Filter inlet. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not used to limit the protection scope of the present invention. Those skilled in the art can make adjustments as needed to adapt to specific applications. For example, although the following embodiments are described using a drum washing machine as an example, this is not restrictive. The technical solution of the present invention is also applicable to clothing processing equipment such as pulsator washing machines, integrated washing and drying machines, and shoe washing machines that require a drainage pump for drainage. Such changes in the application object do not deviate from the main purpose of the present invention and should be limited within the protection scope of the present invention.

[0031] In order to better illustrate the present invention, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present invention can also be implemented without certain specific details.

[0032] In the description of the present invention, the terms "upper", "lower", "inner", "outer" and other terms indicating directions or positional relationships are based on the directions or positional relationships shown in the figure. This is only for the convenience of description, and does not indicate or imply that the equipment to be protected must have a specific orientation, be constructed and operated in a specific orientation. For example, the filter in the present invention should be in a state or orientation with its axis horizontal when used. Therefore, the orientation in the following embodiments cannot be understood as a limitation of the present invention. In addition, ordinal numbers such as "first" and "second" are only for the convenience of description and are not used to indicate or imply relative importance.

[0033] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Combine the following Figures 1 to 4 The filter provided in the embodiment of the utility model and the drainage pump and the drum washing machine using the filter are described.

[0035] The drain pump provided in the embodiment of the utility model is used to discharge the sewage after washing or rinsing. In order to improve the drainage efficiency, most washing machines are currently equipped with a drain pump, especially the models with upper drainage, which need to use a drain pump to raise the water level.

[0036] like Figure 1As shown in , the drainage pump 1 provided by the embodiment of the utility model is a double drainage type drainage pump, and the drainage pump 1 includes a pump housing 10, and the pump housing 10 includes a tubular housing portion 102 located in the middle, a pump housing mounting portion 101 located at one end of the housing portion 102, and an impeller mounting portion 103 located at the opposite end of the pump housing mounting portion 101. The pump housing mounting portion 101 is flange-shaped, and fastener mounting holes are provided thereon, so that the pump housing 10 is fixedly mounted to the front plate of the washing machine with the help of fasteners such as screws, bolts, etc., and a through hole is formed on the front plate. When the installation is completed, the filter 20 inserted into the pump housing 10 is directly opposite to the through hole, so that the user can take out the filter 20 for cleaning. The impeller mounting portion 103 is used to install an impeller (not shown), and the impeller is driven by a motor. The shell portion 102 of the pump housing 10 is provided with a water inlet 104, and the impeller mounting portion 103 is provided with a first drain port 105 and a second drain port 106. The water inlet 104 is connected to the drain pipe of the washing machine, the first drain port 105 is connected to a water pipe connected to the sewer to discharge the sewage in the drum directly to the sewer, and the second drain port 106 is connected to the circulation pipe to realize self-circulation of water.

[0037] It should be noted that the structure of the pump housing 10 in this embodiment is merely exemplary, and the second drain port 106 may not be provided, or the second drain port 106 may be provided near the water inlet 104 to connect to the overflow pipe of the washing machine, in which case the port is no longer used for drainage but for water intake into the drain pump 1. The present invention does not specifically limit the pump housing structure of the drain pump 1, as long as it is applicable to the filter 20 of the present invention.

[0038] Example 1

[0039] This embodiment provides a first method that can be used with Figure 1 The filter 20 structure is adapted to the pump housing 10.

[0040] like Figure 2 and Figure 3 As shown, the filter 20 includes two ends, namely an upper end 201 and a lower end 202 (with Figure 2 The schematic direction in the figure shall prevail, and does not represent the actual use direction of the filter 20). The upper end 201 is a disc-shaped structure, which is connected to a sealing ring (not shown). After the filter 20 is installed in the pump housing 10, the sealing ring can play a sealing role. The lower end 202 is a stacked ring shape, and a through hole is opened in the middle, which serves as the filter outlet 207 of the filter 20. The upper end 201 and the lower end 202 are connected by a vertically extending side support 203, as shown in FIG. Figure 2As shown in the figure, the side support 203 is two vertical plates arranged opposite to each other, and the other side support 203 in the figure is in a blocked state. The two vertical plates and the two ends together construct a cylindrical space, and a plurality of spoilers are arranged in the space to form a spoiler group 204. By means of the arrangement of the spoiler group 204 in the filter chamber, the flow direction of the fluid entering the space can be guided, and a flow channel 206 extending in a serpentine shape along the axial direction is constructed in the filter chamber. By means of the drastic change in flow direction, smaller hard foreign objects in the fluid can be intercepted, but soft foreign objects such as wire scraps will not be hindered from passing through.

[0041] Specifically, Figure 2 and Figure 3 As shown, the filter 20 in this embodiment is provided with three spoilers, and the three spoilers are fixedly connected to the side support 203. The specific connection method can be plug-in, bonding or integrally formed with the side support 203. For example, a groove can be opened on the side support 203, and the thin plate-shaped spoiler is inserted into the groove to achieve axial limitation. After being installed in the pump housing 10, radial limitation is further achieved with the help of the constraint of the pump housing 10; or the spoiler and the side support 203 can be integrally formed by a mold, etc.

[0042] like Figure 3 As shown in FIG. 1 , three spoilers are arranged in a staggered manner along the axis direction of the filter 20, and the staggered arrangement is achieved by means of the structure of the spoiler itself. Specifically, as Figure 2 As shown in , the spoiler in this embodiment is formed by removing a portion of a circular plate. The spoiler close to the upper end 201 is defined as the first spoiler 2041, the spoiler close to the lower end 202 is defined as the second spoiler 2042, and the middle spoiler is defined as the third spoiler 2043. In this embodiment, the second spoiler 2042 and the third spoiler 2043 have the same shape, both are flat plate structures, and have a first edge 2044 and a second edge 2045 connected end to end. The contour of the first edge 2044 is a major arc shape, and the contour of the second edge 2045 is a straight line, so that the spoiler is in the shape of a major arc as a whole. In the installed state, the first edge 2044 is in contact with the inner wall 107 of the filter cavity, and the second edge 2045 is separated from the inner wall 107 of the filter cavity, forming a structure as shown in FIG. Figure 3 The flow area 2064 shown in FIG. 2064 is provided to allow fluid to pass through.

[0043] In this embodiment, the first spoiler 2041 also has a first edge 2044 and a second edge 2045 connected end to end. The difference between the first spoiler 2041 and the second spoiler 2042 and the third spoiler 2043 is that the surface of the first spoiler 2041 is a smooth curved surface. Figure 3As shown in the figure, with reference to the fluid flow direction indicated by the arrow in the figure, for the convenience of observation, the position of the inner wall 107 of the pump housing 10 is schematically indicated by a dotted line in the figure. The serpentine flow channel 206 in this embodiment includes: an inlet section 2061 formed by the upper surface of the first spoiler 2041, the lower surface of the upper end 201, and the inner wall 107 of the housing portion 102, and a middle section 2062 formed by the lower surface of the first spoiler 2041, the third spoiler 2043, the upper surface of the second spoiler 2042, and the inner wall 107 of the housing portion 102, and an outlet section 2063 formed by the lower surface of the second spoiler 2042, the upper surface of the lower end 202, and the inner wall 107 of the housing portion 102. As shown in the figure, the fluid flow direction indicated by the arrow in the figure is indicated by the dotted line in the figure. Figure 2 and Figure 3 As shown in FIG. 1 , the surface of the first spoiler 2041 used to construct the inlet section 2061 of the flow channel 206 is a curved surface, so that the flow cross-sectional area of ​​the inlet section 2061 is gradually reduced. Figure 3 The left side of the first spoiler 2041 (the side away from the filter inlet 208) gradually approaches the upper end 201, so that the flow cross-sectional area of ​​the inlet section 2061 gradually decreases, which can accelerate the movement of the fluid when filtering the fluid, thereby further promoting the smooth passage of foreign matter such as lint.

[0044] Alternatively, the second edge 2045 may also be a curve, such as a curve that is recessed toward the first edge 2044, so that the spoiler is crescent-shaped; or it may be a curve that protrudes away from the first edge 2044, such as an elliptical line; or it may be a wavy line, etc. As long as the edge shape can prevent larger and smaller hard objects from passing through but will not intercept foreign objects such as wire scraps, it should be within the protection scope of the present utility model.

[0045] In addition, although the first spoiler 2041 in the above embodiment is a curved plate, this is not restrictive and the plate may also be a flat plate, such as a flat plate structure that is the same as the second spoiler 2042 and the third spoiler 2043 .

[0046] Furthermore, in order to ensure that the performance curve of the drainage pump 1 does not deviate significantly, after calculation, the flow area of ​​the filter outlet 207 in the present invention is set to be the same as or close to the flow area corresponding to the flow area 2064 .

[0047] Combination Figure 1 and Figure 3After the filter 20 is installed into the pump casing 10, the upper end 201 of the filter 20 can be observed from the pump casing mounting portion 101, the filter outlet 207 of the lower end 202 of the filter 20 is opposite to the impeller at the impeller mounting portion 103, and the water inlet 104 on the casing portion 102 is opposite to the filter inlet 208 of the filter 20. When water with foreign matter enters the filter chamber from the water inlet 104, the water will flow and be filtered under the guidance of the serpentine flow channel 206, and finally flow from the filter outlet 207 to the impeller. The rotating impeller further prompts the filtered water to flow out from the first drain port 105 or the second drain port 106.

[0048] Example 2

[0049] The difference between this embodiment and embodiment 1 is that the number of spoilers in this embodiment is two, and the number of bends of the serpentine flow channel 206 is less than that in embodiment 1, but the structure is simpler and the manufacturing cost is lower.

[0050] Specifically, Figure 4 As shown in , the spoiler in this embodiment includes two flat plates with the same structure. The two spoilers are connected to the side support 203 in a parallel and staggered manner. Specifically, they can be constructed by plugging or integrally forming. Figure 3 In this embodiment, the serpentine flow channel 206 constructed by the filter 20 with two spoilers includes: an inlet section 2061 constructed by the lower surface of the upper end 201, the upper surface of the first spoiler 2041, and the inner wall 107 of the pump housing 10, and a middle section 2062 constructed by the lower surface of the first spoiler 2041, the upper surface of the second spoiler 2042, and the inner wall 107 of the pump housing 10, and an outlet section 2063 constructed by the lower surface of the second spoiler 2042, the upper surface of the lower end 202, and the inner wall 107 of the pump housing 10. The serpentine flow channel 206 includes two flow areas 2064, and the water flow makes two major bends, such as Figure 4 As shown by the solid and dotted arrows in , the dotted arrows indicate the flow direction at the location of the blocked flow area 2064. The filtering performance of this solution is lower than that of Example 1, but it is simpler in structure and lower in cost.

[0051] Furthermore, the filter 20 of Embodiment 1 and Embodiment 2 is also provided with a side wall portion 205, and the side wall portion 205 covers a part of the side support 203 and the spoiler to form a semi-cylindrical structure, which is conducive to enhancing the overall strength of the filter 20. The side wall portion 205 can be integrally formed with the side support 203, the spoiler, etc.

[0052] It should be noted that the number of spoilers is not limited to the two or three cases in the above embodiments, but may be more, such as 4, 5, etc. The specific number of spoilers may be selected according to the performance requirements of the drainage pump 1, and any suitable number of spoilers may be provided without significantly affecting the performance curve of the drainage pump 1. In addition, the spoiler structures in Embodiment 1 and Embodiment 2 are wholly or partially the same, and different shapes may be provided for each spoiler. Such a combination will be more conducive to blocking the passage of foreign objects of different types or shapes, increasing the probability of intercepting foreign objects, and preventing the impeller from being damaged.

[0053] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A filter for a drainage pump, characterized in that: The filter can be accommodated in the pump casing of the drainage pump and thus construct a filter chamber. The filter includes two ends and a side support connecting the two ends. The filter also includes a plurality of spoilers connected to the side supports. The plurality of spoilers are staggered along the axial direction of the filter to construct a flow channel extending in a serpentine shape along the axial direction in the filter chamber.

2. The filter for a drainage pump according to claim 1, characterized in that: The spoiler has a first edge that is in contact with the inner wall of the filter cavity in an installed state, and a second edge that is separated from the inner wall, and a flow area is formed between the second edge and the inner wall of the filter cavity for fluid to pass through. Wherein, the first edge is in the shape of a major arc or a semicircle; and / or The second edge is a straight line or a curved line.

3. The filter for a drainage pump according to claim 2, characterized in that: One of the ends is provided with a filter outlet communicated with the filter cavity, and a flow area of ​​the filter outlet is the same as or close to a flow area corresponding to the flow zone.

4. The filter for a drainage pump according to claim 1, characterized in that: The plurality of spoilers have the same shape; or At least two spoilers among the plurality of spoilers have different shapes.

5. The filter for a drainage pump according to claim 1, characterized in that: The number of the spoilers is greater than or equal to two.

6. The filter for a drainage pump according to claim 1, characterized in that: The surface of the spoiler used to construct the inlet section of the flow channel is a curved surface, so that the flow cross-sectional area of ​​the inlet section of the flow channel is gradually reduced.

7. The filter for a drainage pump according to claim 1, characterized in that: The filter further includes a side wall portion covering the side support and a portion of the spoiler.

8. The filter for a drainage pump according to claim 1, characterized in that: The spoiler is plug-connected with the side support or formed in one piece.

9. A drainage pump, characterized in that: The drain pump includes the filter for a drain pump according to any one of claims 1 to 8.

10. A clothes processing device, characterized in that: Including the drainage pump as described in claim 9.

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