Water purification module and washing machine

Abstract

The present invention discloses a water purification module and a washing machine, wherein the water purification module comprises: a shell, one end of which is mounted with an end cap connected by a thread; a telescopically movable limiting column is provided on the shell, the telescopic end of the limiting column is in limiting contact with the end cap, and the relative position of the end cap is adjusted by utilizing the telescopic movement of the limiting column. Through the above arrangement, the end cap of the water purification module can be tightened in different positions to achieve the purpose of adjusting the size of the internal space of the water purification module, thereby achieving the effect of correspondingly adjusting the flow rate of the water flowing through the water purification module. More particularly, the length of the extending limiting column can be adjusted according to the usage time of the filter element in the water purification module, thereby achieving the purpose of adjusting the position of the end cap, thereby achieving the purpose of correspondingly adjusting the flow rate of the water flowing through the water purification module and improving the filtration efficiency of the water purification module.

Description

Technical Field

[0001] The present invention belongs to the field of clothing processing equipment and relates to a washing machine, in particular to a washing machine capable of purifying incoming water, and also relates to a water purification module for purifying water. Background Art

[0002] In the prior art, the water used in washing machines is mostly untreated tap water, but there are many alkaline ions (such as calcium, magnesium, etc.) in tap water. These ions will inevitably produce chemical reactions when encountering the alkaline detergent in the washing machine to generate insoluble particles that are easy to precipitate and adsorb. These solid substances may precipitate at the bottom of the washing machine, accumulate in the gaps between the washing machine components, and bring hidden dangers to the normal operation of the washing machine; or be adsorbed on the surface of clothes, causing clothing stones and affecting the quality of clothes. On the other hand, there are also a large number of bacteria in tap water. As people's requirements for quality of life increase, users pay more and more attention to the cleanliness of the clothing washing environment, especially for children and patients who are very sensitive to bacteria. Washing water purification is essential, which shows the necessity of washing water treatment.

[0003] However, existing water purification modules can experience reduced filter performance during use, even when filtering the washing machine's incoming water. If the washing machine continues to operate normally and continues to receive water, the reduced filter performance will prevent it from fully filtering the incoming water. This can lead to water accumulation within the module and reduced filtration effectiveness.

[0004] Therefore, providing a water purification module that can be adjusted according to the usage time of the filter element and is suitable for purifying the water entering the washing machine has become a research and development hotspot.

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

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide a water purification module to adjust the internal space of the chamber, thereby achieving the purpose of improving the filtration efficiency of the water purification module. The present invention also provides a washing machine to achieve the purpose of purifying the water entering the washing machine and adjusting the water pressure accordingly.

[0007] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0008] The present invention provides a water purification module, which includes: an outer shell, one end of which is installed with an end cover connected by a thread; a telescopic limit column is provided on the outer shell, and the telescopic end of the limit column is in limiting contact with the end cover, so that the relative position of the end cover can be adjusted and the locking position of the end cover can be changed by utilizing the telescopic movement of the limit column, thereby achieving the purpose of adjusting the size of the internal space of the water purification module.

[0009] Furthermore, the outer periphery of the upper end of the shell is provided with an external thread, and the lower end of the end cover is provided with an internal thread, and the internal thread and the external thread are correspondingly engaged; the outer periphery of the upper end of the shell is provided with a limit column that can be telescopically moved up and down, and the upper end of the limit column is in limiting contact with the outer periphery of the end cover.

[0010] Further preferably, a downwardly protruding mounting sleeve is provided at the lower end of the end cover, an internal thread is provided on the inner peripheral wall of the mounting sleeve, and the upper end of the limiting column is in limiting contact with the lower end of the mounting sleeve.

[0011] Furthermore, the limiting column is a columnar structure extending vertically up and down; the outer periphery of the housing is provided with a mounting seat protruding outward, and the mounting seat is provided with a guide hole vertically penetrating the mounting seat up and down; the limiting column can be rotatably inserted into the corresponding guide hole;

[0012] Preferably, the upper and lower ends of the limiting column respectively have radially protruding limiting portions, and the distance between at least a portion of the limiting portion and the axis of the limiting column is greater than the aperture of the guide hole;

[0013] Further preferably, at least a portion of the guide hole is located below the end cover, so that the guide post inserted into the guide hole can be in limiting contact with the end cover after telescopic movement up and down.

[0014] Furthermore, radially protruding limiting ribs are provided at different height sections of the limiting column; the distance between the end of the limiting rib and the axis of the limiting column is greater than the diameter of the guide hole;

[0015] Preferably, each limiting rib extends horizontally along the radial direction of the limiting column;

[0016] Preferably, the distances between the ends of the limiting ribs and the axis of the limiting column are set equal, and the limiting ribs extend in different directions.

[0017] Furthermore, the limiting column is cylindrical, the guide hole is a circular hole with the same diameter as the limiting column, and one side of the circular hole is connected to a radially extending long strip notch, and the extension length of the notch is greater than or equal to the extension length of the limiting rib.

[0018] Furthermore, the height of the limiting column is greater than the distance between the top of the external thread and the mounting seat, and the mounting seat is lower than the lowest point of the external thread;

[0019] The distance between each limiting rib and the top of the limiting column is smaller than the distance between the top of the mounting seat and the top of the external thread, and larger than the distance between the top of the mounting seat and the bottom of the external thread.

[0020] Furthermore, an outwardly protruding indicator protrusion extending in a direction parallel to the axis of the end cover is provided on the outer peripheral side wall of the end cover;

[0021] The outer peripheral side wall of the housing is provided with a plurality of auxiliary indicating protrusions which are arranged at intervals, protrude outwards, extend in a direction parallel to the axis of the end cover, and are located below the external thread;

[0022] When the end cover is in limiting contact with the limiting columns extending at different heights, the indicating convex and the corresponding auxiliary indicating convex are aligned up and down.

[0023] Furthermore, a chamber is provided inside the shell, and a water inlet connected to the chamber inside the shell is provided at the center of the end cover; the other end of the shell is sealed and provided with a water outlet; a filter element is provided in the chamber to filter the water flowing through.

[0024] Furthermore, a sealing strip is correspondingly sandwiched between the upper end surface of the housing and the lower end surface of the end cover;

[0025] Preferably, the upper end surface of the shell is provided with multiple circles of sealing strips protruding downward, at least one circle of sealing strips corresponds to the upper end surface of the shell and is in sealing contact, and the outer periphery of at least one circle of sealing strips is in sealing contact with the inner wall of the chamber of the shell.

[0026] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0027] Through the above arrangement, the end cap of the water purification module can be tightened in different positions to adjust the size of the internal space of the water purification module, thereby achieving the effect of correspondingly adjusting the flow rate of water flowing through the water purification module. More specifically, the length of the limit post can be adjusted according to the service life of the filter element in the water purification module, thereby adjusting the position of the end cap to achieve the purpose of correspondingly adjusting the flow rate of water flowing through the water purification module and improving the filtration efficiency of the water purification module.

[0028] Furthermore, in this application, an outwardly protruding indicator protrusion extending parallel to the axis of the end cap is provided on the mounting sleeve of the end cap; a plurality of spaced-apart, outwardly protruding auxiliary indicator protrusions extending parallel to the axis of the end cap and located below the external threads are provided on the outer periphery of the housing; when the end cap is rotated to different relative thread locking positions, the indicator protrusion and the corresponding auxiliary indicator protrusion overlap vertically. This arrangement achieves the purpose of precisely positioning the end cap at different locking positions, thereby achieving a significant technical advancement in facilitating user control and enabling blind operation of the water purification module end cap.

[0029] At the same time, the present invention has a simple structure, significant effects, and is suitable for popularization and use.

[0030] The present invention further provides a washing machine, comprising: the above-mentioned water purification module is arranged in the water inlet water channel of the washing machine.

[0031] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive effort. In the accompanying drawings:

[0033] Figure 1 Schematic diagram of the exploded structure of the water purification module in an embodiment of the present invention;

[0034] Figure 2 1 is a schematic diagram of the top view of the water purification module in an embodiment of the present invention;

[0035] Figure 3 In the embodiment of the present invention Figure 2 AA cross-sectional structural diagram;

[0036] Figure 4 and Figure 5 In the embodiment of the present invention Figure 3 A schematic diagram of the enlarged structure of the limit column at B at different heights;

[0037] Figure 6 2 is a schematic diagram of the installation cross-sectional structure of the limiting column in an embodiment of the present invention.

[0038] Description of the main components in the figure:

[0039] 1. Housing; 2. End cover; 3. Limiting column; 4. Chamber; 5. Water inlet; 6. Water outlet; 7. External thread; 8. Internal thread; 9. Filter element; 10. Indicating cam; 11. Auxiliary indicating cam; 12. Mounting seat; 13. Guide hole; 14. Notch; 21. Mounting sleeve; 31. Limiting part; 32. Limiting rib.

[0040] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0041] In order to make the purpose, 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 in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0042] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0043] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0044] like Figures 1 to 6 As shown, an embodiment of the present invention introduces a water purification module, which includes: an outer shell 1, and an end cover 2 connected by a thread is installed at one end of the outer shell 1; a limiting column 3 that can be telescopically moved toward the end cover is provided on the outer shell 1, and the telescopic end of the limiting column 3 is in contact with the end cover 2. The telescopic limiting column 3 is used to adjust the number of threaded engagement circles between the end cover 2 and the outer shell 1, thereby changing the relative position of the end cover, so as to achieve the effect of adjusting the size of the internal chamber space of the outer shell 1 of the water purification module.

[0045] Through the above arrangement, the end cap of the water purification module can be tightened in different positions to adjust the size of the internal space of the water purification module, thereby achieving the effect of correspondingly adjusting the flow rate of water flowing through the water purification module. More specifically, the length of the limit post can be adjusted according to the service life of the filter element in the water purification module, thereby adjusting the position of the end cap to achieve the purpose of correspondingly adjusting the flow rate of water flowing through the water purification module and improving the filtration efficiency of the water purification module.

[0046] In this embodiment, the outer periphery of the upper end of the shell 1 of the water purification module is provided with an external thread 7, and the outer periphery of the end cover 2 is provided with a downwardly protruding mounting sleeve 21, and the mounting sleeve 21 is composed of a circle of ribs provided on the lower end surface of the end cover 2 and protruding downward. The mounting sleeve 21 is coaxially arranged with the upper end of the shell 1 and correspondingly plugged into the upper end of the shell 1; the inner periphery of the mounting sleeve 21 is provided with an internal thread 8, and the internal thread 8 and the external thread 7 are correspondingly engaged to realize the threaded connection corresponding to the upper end of the shell 1 after the end cover 2 is rotated, so as to achieve the effect of adjusting the relative position of the end cover 2 by utilizing the threaded rotation of the end cover 2, and then achieving the effect of adjusting the space size of the internal chamber 4 of the water purification module shell 2.

[0047] In this embodiment, the outer periphery of the upper end of the housing 1 is provided with a limit column 3 that can be telescopically moved up and down. The upper end of the limit column 3 is provided at the corresponding lower part of the mounting sleeve 21 of the end cover 2, so that the limit column 3 can be moved up and down accordingly, so that the upper end of the limit column 3 can be extended to different height positions. After the threaded end cover 2 is rotated to a set position, the lower end of the end cover 2 is in contact with the upper end of the limit column 3 that is extended to the corresponding height, so that the end cover 2 cannot continue to rotate. After the end cover 2 is rotated to the set position, it is stopped by the limit column that is extended to the corresponding height and the tightening position is changed, thereby achieving the purpose of changing the tightening position of the end cover and adjusting the space size of the internal chamber 4 of the water purification module.

[0048] In this embodiment, the limiting post 3 is a columnar structure extending vertically up and down. The outer periphery of the housing 1 is provided with an outwardly protruding mounting seat 12, and the mounting seat 12 is provided with a guide hole 13 extending vertically through the mounting seat 12. The limiting post 3 is rotatably inserted into the corresponding guide hole 13. This arrangement achieves the effect of the limiting post 3 being able to move vertically and telescopically and being plug-mounted to the housing 1.

[0049] In this embodiment, the upper and lower ends of the limiting column 3 respectively have radially protruding limiting portions 31, and the distance between at least a portion of the limiting portion 31 and the axis of the limiting column 3 is greater than the aperture of the guide hole 13. Under the action of the limiting portions 31 provided at the upper and lower ends of the limiting column 3, the limiting column 3 will not be separated from the mounting seat 12 due to excessive up and down movement, thereby achieving the purpose of the matching assembly of the limiting column 3 and the mounting seat 12. Preferably, in order to enhance the limiting force of the limiting column 3 on the end cover 2, the limiting portion 31 at the upper end of the limiting column 3 can be set as a horizontally extending flat plate structure, so that the contact between the limiting portion 31 at the upper end of the limiting column 3 and the lower end of the mounting sleeve 21 of the end cover 2 is surface contact.

[0050] In this embodiment, at least a portion of the guide hole 13 is located below the mounting sleeve 21 of the end cover 2 to ensure that after the limit column 3 is extended, at least a portion of the upper end portion of the limit column 3 can contact the end cover 2, thereby achieving the effect of the limit column 3 limiting and locking the end cover 2 and changing the locking position of the end cover 2.

[0051] like Figures 3 to 6 As shown, in this embodiment, radially protruding limiting ribs 32 are provided at cross sections at different heights of the limiting post 3. The distance between the end of the limiting rib 32 and the axis of the limiting post 3 is greater than the diameter of the guide hole 13. By providing multiple limiting ribs at different heights on the limiting post, when the limiting post moves to a corresponding height, the limiting ribs contact the upper end of the mounting seat, ensuring that the limiting post does not move downward under the action of its own weight and the downward pressure of the end cover, thereby achieving the effect of locking the limiting post at the corresponding set height.

[0052] Preferably, in this embodiment, each limiting rib 32 extends horizontally along the radial direction of the limiting column 3 to ensure that each limiting rib 32 is at a different height to avoid mutual interference; at the same time, a surface contact is formed between the limiting rib 32 and the upper end surface of the mounting seat 12 to improve the support stability and firmness of the limiting column 3.

[0053] Preferably, in this embodiment, the ends of each limiting rib 32 are set at equal distances from the axis of the limiting column 3, and each limiting rib 32 extends in different radial directions (not indicated in the accompanying drawings). By setting the extension lengths of the limiting ribs to be equal, only one notch of corresponding shape is required on the mounting seat to ensure that each limiting rib passes through the mounting seat and slides up and down. At the same time, by extending the limiting ribs in different directions, the user can determine the movement position of the limiting rib based on the orientation, and improve the convenience of the user in moving the limiting column and controlling the limiting column to rotate and lock to the corresponding set height.

[0054] Of course, in order to avoid interference between adjacent limiting ribs 32 , the height difference between adjacent limiting ribs 32 must be greater than the height of the mounting seat 12 .

[0055] like Figures 3 to 6 As shown, in this embodiment, the limiting post 3 is cylindrical, and the guide hole 13 is a circular hole with the same diameter as the limiting post 3. One side of the circular hole is connected to a radially extending long strip notch 14, and the extension length of the notch 14 is greater than or equal to the extension length of the limiting rib 32. By providing the notch 14 on the mounting base 12, which is connected to one side of the circular guide hole 13, the limiting rib 32 and the notch 14 can be aligned after the limiting post 3 rotates about its axis. This allows the limiting rib 32 of the limiting post 3 to pass through the mounting base 12, allowing the limiting post 3 to move up and down smoothly.

[0056] In this embodiment, the height of the limiting post 3 is greater than the distance between the top of the external thread 7 and the mounting seat 12, and the mounting seat 12 is lower than the lowest point of the external thread 7. The distance between each limiting rib 32 and the top of the limiting post 3 is less than the distance between the top of the mounting seat 12 and the top of the external thread 7, and greater than the distance between the top of the mounting seat 12 and the bottom of the external thread 7. This ensures that when each limiting rib 32 of the limiting post 3 contacts the top surface of the mounting seat 12, the top of the limiting post 3 is within the height range of the external thread 7 at the upper end of the housing 1, achieving the effect of the limiting post 3 contacting and limiting the end cap 2.

[0057] like Figure 1As shown, in this embodiment, an outwardly protruding indicator protrusion 10 is provided on the outer peripheral wall of the mounting sleeve 21 of the end cover 2, extending in a direction parallel to the axis of the end cover 2; a plurality of spaced-apart, outwardly protruding, extending in a direction parallel to the axis of the end cover 2, and located below the external thread 7 are provided on the outer peripheral wall of the housing 1; when the end cover 2 is in limiting contact with the limiting columns extending at different heights and rotated to different locking positions, the indicating protrusion 10 and the corresponding auxiliary indicating protrusion 11 overlap each other up and down.

[0058] Through the above arrangement, the purpose of accurately positioning the end cover 2 at different set positions is achieved, thereby achieving significant technical progress in facilitating user control and achieving blind operation of the end cover 2 of the water purification module.

[0059] In this embodiment, the auxiliary indicator projections 11 provided on the outer peripheral wall of the housing 1 have different tactile characteristics, such as different vertical extension lengths, circumferential widths, cross-sectional shapes, or any combination thereof. This allows the user to determine the gear position corresponding to the rotational position of the end cap simply by feel, thereby improving the ease of operation of the water purifier.

[0060] Furthermore, each auxiliary indicator protrusion 11 is provided in a one-to-one correspondence with each limiting rib 32 provided on the limiting column 3. Thus, when each auxiliary indicator protrusion 11 corresponds to each indicator protrusion 10, the limiting column 32 is at the corresponding gear height, the corresponding limiting rib 32 is supported on the top of the mounting seat 12, and the lower end of the end cover 2 contacts the upper end of the limiting post 32, so that the end cover 32 can be adjusted and raised between the various gear heights, thereby facilitating the user to adjust the height of the end cover 32.

[0061] like Figures 1 to 6 As shown, in this embodiment, a chamber 4 is provided inside the shell 1, and a water inlet 5 connected to the internal chamber 4 of the shell 1 is provided at the center of the end cover 2; the other end of the shell 1 is sealed and provided with a water outlet 6; a filter element 9 for filtering the water flowing through is provided in the chamber 4, and the filter element 9 is installed on the shell 1 and / or the end cover 2.

[0062] In this embodiment, the filter element 9 is located in the middle of the chamber 4, and there is a certain height difference between the upper end of the filter element 9 and the lower end surface of the end cover 2. The filter element 9 is fixed on the outer shell 1, so that the user can rotate and turn the end cover 2 to different set height positions, thereby achieving the effect of adjusting the size of the water inlet chamber between the filter element 9 and the end cover 2, and then adjusting the water inlet rate of the water purification module.

[0063] Or, as Figures 1 to 6As shown, the filter element 9 is installed on the end cover 2, and the filter element 9 moves up and down with the end cover 2, so that the user can rotate and turn the end cover 2 to different set height positions, thereby adjusting the size of the water outlet chamber between the filter element 9 and the lower end of the shell 1, and also achieving the effect of adjusting the pressure and water rate in the water purification module chamber 4.

[0064] In this embodiment, a sealing strip is sandwiched between the upper end surface of the housing 1 and the lower end surface of the end cap 2. Preferably, the upper end surface of the housing 1 is provided with multiple rings of sealing strips that protrude downward, with at least one ring of sealing strips corresponding to and sealingly contacting the upper end surface of the housing 1, and the outer periphery of at least one ring of sealing strips is in sealing contact with the inner wall of the inner chamber 4 of the housing 1. This ensures that when the end cap 2 contacts the limiting pillar 3 at any set height, the upper end opening of the inner chamber 4 of the housing 1 can be sealed.

[0065] In this embodiment, the water purification module is used as follows:

[0066] Status 1: Figure 4 As shown, when the filter element 9 in the water purification module has the best permeability, the limit column 3 is moved to the lowest position and the end cover 2 is rotated to the lowest position; at this time, the space in the internal chamber 4 of the water purification module is the smallest and the pressure in the chamber 4 is the highest, so that water flows through the water purification module at the maximum rate and the filtration effect of the water purification module is the best;

[0067] Status 2: Figure 5 As shown, when the filter element 9 in the water purification module has been used for a period of time and the permeability of the filter element 9 has deteriorated, the limit column 3 is moved upward to the middle position and the end cover 2 is rotated to the middle position; at this time, the space of the internal chamber 4 of the water purification module is increased, and the water inlet flow rate is slowed down, so that the water purification module is fed with water at a smaller water inlet rate, thereby avoiding water accumulation in the internal chamber 4 of the water purification module and improving the filtering effect of the water purification module.

[0068] A washing machine is described in an embodiment of the present invention, comprising: a shell, an outer drum provided in the shell, the outer drum connected to the shell via a shock absorber, and a drive motor installed on the outside of the outer drum; a water inlet channel provided in the shell, the water inlet of the water inlet channel connected to an external water source, and the water outlet connected to the outer drum, for guiding external water flow into the outer drum.

[0069] In this application, the above-mentioned water purification module is set in the water inlet water channel of the washing machine. The water purification module filters the incoming water and adjusts the water quality so that the water entering the outer drum of the washing machine meets the washing standards, thereby improving the washing effect of the washing machine.

[0070] In addition, in this application, the above-mentioned water purification module is set in the water inlet water channel of the washing machine, and the locking position of the end cover of the water purification module is designed to be adjustable to adjust the size of the internal space of the water purification module, thereby achieving the effect of correspondingly adjusting the flow rate of water flowing through the water purification module of the washing machine.

[0071] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make slight changes or modifications to equivalent embodiments using the above technical content without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A washing machine, characterized in that: A water purification module is provided in the water inlet channel of the washing machine; The water purification module comprises: a housing, one end of which is mounted with an end cap connected by a thread; a telescopically movable limiting column is provided on the housing, and the telescopic end of the limiting column is in limited contact with the end cap; The limiting column is a columnar structure extending vertically up and down; the outer periphery of the housing is provided with a mounting seat protruding outward, and the mounting seat is provided with a guide hole vertically penetrating the mounting seat up and down; the limiting column can be rotatably inserted into the corresponding guide hole; Radially protruding limiting ribs are provided at different heights of the limiting column; the distance between the end of the limiting rib and the axis of the limiting column is greater than the diameter of the guide hole; each limiting rib extends horizontally along the radial direction of the limiting column; the distance between the end of each limiting rib and the axis of the limiting column is equal, and each limiting rib extends in a different direction; the height difference between adjacent limiting ribs is greater than the height of the mounting seat; The limiting column is cylindrical, the guide hole is a circular hole with the same diameter as the limiting column, one side of the circular hole is connected to a radially extending long strip notch, and the extension length of the notch is greater than or equal to the extension length of the limiting rib.

2. A washing machine according to claim 1, characterized in that: The outer periphery of the upper end of the shell is provided with an external thread, and the lower end of the end cover is provided with an internal thread, and the internal thread and the external thread are meshed with each other.

3. A washing machine according to claim 2, characterized in that: The outer periphery of the upper end of the shell is provided with a limit column that can be telescopically moved up and down, and the upper end of the limit column is in limited contact with the outer periphery of the end cover; The lower end of the end cover is provided with a downwardly protruding mounting sleeve, the internal thread is provided on the inner peripheral wall of the mounting sleeve, and the upper end of the limiting column is in limiting contact with the lower end of the mounting sleeve.

4. The washing machine according to claim 1, wherein: The upper and lower ends of the limiting column respectively have radially protruding limiting parts, and the distance between at least part of the limiting part and the axis of the limiting column is greater than the aperture of the guide hole.

5. A washing machine according to claim 4, characterized in that: At least a portion of the guide hole is located below the end cover.

6. A washing machine according to any one of claims 1 to 5, characterized in that: The height of the limiting column is greater than the distance between the top of the external thread and the mounting seat, and the mounting seat is lower than the lowest point of the external thread; The distance between each limiting rib and the top of the limiting column is smaller than the distance between the top of the mounting seat and the top of the external thread, and larger than the distance between the top of the mounting seat and the bottom of the external thread.

7. A washing machine according to any one of claims 1 to 5, characterized in that: An outwardly protruding indicator protrusion extending in a direction parallel to the axis of the end cover is provided on the outer peripheral side wall of the end cover; The outer peripheral side wall of the housing is provided with a plurality of auxiliary indicating protrusions which are arranged at intervals, protrude outwards, extend in a direction parallel to the axis of the end cover, and are located below the external thread; When the end cover is in limiting contact with the limiting columns extending at different heights, the indicating convex and the corresponding auxiliary indicating convex are aligned up and down.

8. A washing machine according to any one of claims 1 to 5, characterized in that: A chamber is provided inside the shell, a water inlet connected to the chamber inside the shell is provided at the center of the end cover; a water outlet is provided at the other end of the shell; and a filter element for filtering the water flowing through is provided in the chamber.

9. A washing machine according to any one of claims 1 to 5, characterized in that: A sealing strip is correspondingly clamped between the upper end surface of the shell and the lower end surface of the end cover.

10. The washing machine according to claim 9, characterized in that: The upper end surface of the shell is provided with multiple circles of sealing strips protruding downwards, at least one circle of sealing strips corresponds to the upper end surface of the shell and is in sealing contact, and the outer periphery of at least one circle of sealing strips is in sealing contact with the inner wall of the chamber of the shell.

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