Filter

Abstract

The utility model relates to a filter which comprises a filter body, a front shell and a rear shell, the front shell is separably attracted to the front side of the filter body, and the rear shell is separably attracted to the rear side of the filter body. According to the filter disclosed by the invention, the filter is convenient to assemble, disassemble, install, disassemble, use, overhaul and the like, and the user experience feeling of the filter is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of filtering devices, in particular to a filter. BACKGROUND

[0002] Filters are widely used for filtering water, wherein a filter installed at the front end of a pipeline is used for rough filtering of water, and thus, can also be commonly referred to as a front filter. The filter is provided with a water inlet and a water outlet on the left and right sides respectively, the water inlet is used for connecting with a water inlet pipe, and the water outlet is used for connecting with a water outlet pipe. In operation, water enters the inside of the front filter from the water inlet pipe, and the water filtered by the front filter flows out through the water outlet pipe, thereby achieving the filtering of water. The filter in the related art has the problems of inconvenience in assembly, disassembly, installation, dismounting, use and maintenance, which affects the user experience. CONTENT OF THE UTILITY MODEL

[0003] The present disclosure provides a filter to improve the convenience of assembly, disassembly, installation, dismounting, use and maintenance of the filter.

[0004] The filter of the present disclosure comprises a filter body, a front shell and a rear shell, the front shell is separably attracted to the front side of the filter body, and the rear shell is separably attracted to the rear side of the filter body.

[0005] Optionally, the front shell and the rear shell are attracted to each other.

[0006] Optionally, the front shell and the rear shell are in abutment.

[0007] Optionally, the outer peripheral contour of the front shell and the outer peripheral contour of the rear shell are symmetrical along the front-rear direction of the filter.

[0008] Optionally, the filter body is provided with a water inlet and a water outlet, the water inlet and the water outlet are oppositely arranged; the front shell and the rear shell form a water inlet hole and a water outlet hole therebetween, the water inlet is provided corresponding to the water inlet hole, and the water outlet is provided corresponding to the water outlet hole.

[0009] Optionally, the diameter of the water inlet hole and the water outlet hole is 30.5mm-32.5mm.

[0010] Optionally, the front shell is provided with an observation hole, and the filter comprises a transparent piece, the transparent piece is connected with the front shell and arranged in the observation hole.

[0011] Optionally, the front shell and the rear shell are magnetically attracted.

[0012] Optionally, the front shell is provided with a front magnetic attraction part, and the rear shell is provided with a rear magnetic attraction part, and the front magnetic attraction part is magnetically attracted to the rear magnetic attraction part.

[0013] Optionally, the front magnetic attraction part comprises a front magnetic member, and the rear magnetic attraction part comprises a rear magnetic member.

[0014] Optionally, the filter further comprises a lower shell, which is arranged outside the filter body and at the lower side of the front shell and the rear shell, and is provided with an operation panel, and the lower shell is rotatable around the circumference of the filter body to adjust the orientation of the operation panel.

[0015] Optionally, the height of the front shell and the height of the rear shell are both 145mm-150mm.

[0016] The filter of the present disclosure, by attracting the front shell to the front side of the filter body and attracting the rear shell to the rear side of the filter body, only needs to attract the front shell to the front side of the filter body and attract the rear shell to the rear side of the filter body during assembly and installation of the filter, without the need for buckle connection and fastener connection operations; during disassembly and removal of the filter, only needs to overcome the attraction force and remove the front shell and the rear shell from the filter body, without the need for buckle connection and fastener connection operations. In addition, when the user needs to observe and maintain the filter body, only needs to overcome the attraction force to remove the front shell from the filter body, and can observe and maintain the filter body. Thus, the assembly, disassembly, installation, removal, use and maintenance of the filter are facilitated, and the user experience of the filter is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a perspective view of a pre-filter of an embodiment of the present disclosure.

[0018] Figure 2 is an exploded structural schematic view of a pre-filter of an embodiment of the present disclosure.

[0019] Figure 3 is an exploded view of a pre-filter of an embodiment of the present disclosure.

[0020] Figure 4 is a front view of a pre-filter of an embodiment of the present disclosure with the front shell and the rear shell hidden.

[0021] Figure 5 is a perspective view of a pre-filter of an embodiment of the present disclosure in a first installation state from a first viewing angle.

[0022] Figure 6 is a perspective view of a pre-filter of an embodiment of the present disclosure in a second installation state.

[0023] Figure 7 is a perspective view of the pre-filter in the first installation state in the related art.

[0024] Figure 8 is a perspective view of the pre-filter in the second installation state in the related art.

[0025] Reference Signs:

[0026] 10, filter;

[0027] 1, filter body; 11, water inlet; 12, water outlet;

[0028] 2, front housing; 21, front magnetic attraction part; 22, front magnetic part; 23, observation hole; 24, water inlet perforation; 241, first groove;

[0029] 3, rear housing; 31, rear magnetic attraction part; 32, rear magnetic part; 33, rear installation slot; 341, third groove; 342, fourth groove;

[0030] 4, transparent part;

[0031] 5, lower housing; 51, operation panel;

[0032] 20, water inlet pipe;

[0033] 30, water outlet pipe;

[0034] 100, front housing;

[0035] 200, rear housing;

[0036] 300, water inlet pipe;

[0037] 400, water outlet pipe. DETAILED DESCRIPTION

[0038] Embodiments of the present disclosure are described in detail below with reference to the attached drawings. Examples of the embodiments described below are exemplary and are intended to explain the present disclosure, and are not to be understood as limiting the present disclosure.

[0039] As shown in Figures 1 to 4 , the filter 10 of the embodiment of the present disclosure includes a filter body 1, a front housing 2, and a rear housing 3, the front housing 2 being separably attracted to the front side of the filter body 1, and the rear housing 3 being separably attracted to the rear side of the filter body 1.

[0040] The filter 10 of the embodiments of the present disclosure, by attracting the front shell 2 to the front side of the filter body 1 and attracting the rear shell 3 to the rear side of the filter body 1, so that when assembling and installing the filter 10, only the front shell 2 needs to be attracted to the front side of the filter body 1 and the rear shell 3 needs to be attracted to the rear side of the filter body 1, without the need for buckle connection and fastener connection and other operations; when disassembling and removing the filter 10, only the front shell 2 and the rear shell 3 need to be removed from the filter body 1 by overcoming the attraction force, without the need for buckle disconnection and fastener disconnection and other operations. In addition, when the user needs to observe and maintain the filter body 1, only the front shell 2 needs to be removed from the filter body 1 by overcoming the attraction force, and the filter body 1 can be observed and maintained. Thus, the assembly, disassembly, installation, removal, use and maintenance of the filter 10 are facilitated, and the user experience of the filter 10 is improved.

[0041] Optionally, the front shell 2 and the rear shell 3 are attracted to each other.

[0042] By attracting the front shell 2 and the rear shell 3 to each other, when the front shell 2 and the rear shell 3 are separated by overcoming the attraction force, the front shell 2 and the rear shell 3 can be removed from the filter body 1 at the same time, without the need for separate separation operations between the front shell 2 and the filter body 1 and between the rear shell 3 and the filter body 1; and after the front shell 2 and the rear shell 3 are attracted to each other, the front shell 2 and the rear shell 3 can be fixed to the outside of the filter body 1 at the same time, without the need for separate connection operations between the front shell 2 and the filter body 1 and between the rear shell 3 and the filter body 1. Thus, the assembly, disassembly, installation and removal of the filter 10 are further facilitated.

[0043] Of course, in other embodiments, the front shell 2 and the filter body 1 can also be attracted to each other, and the rear shell 3 and the filter body 1 can also be attracted to each other.

[0044] Optionally, the front shell 2 and the rear shell 3 are magnetically attracted to each other.

[0045] By magnetically attracting the front shell 2 and the rear shell 3 to each other, only the magnetic force between the front shell 2 and the rear shell 3 needs to be overcome, and the front shell 2 and the rear shell 3 can be removed from the filter body 1; and only the front shell 2 and the rear shell 3 need to be close to each other, and the front shell 2 and the rear shell 3 can be attracted. Further facilitate the assembly, disassembly, installation and removal of the filter 10.

[0046] Of course, in other embodiments, the front shell 2 and the rear shell 3 can also be attracted by air suction, for example, the front shell 2 and the rear shell 3 are provided with suction cups, and the front shell 2 and the rear shell 3 are attracted by the suction cups.

[0047] Optionally, as shown in Figure 2 The front shell 2 is provided with a front magnetic attraction part 21, and the rear shell 3 is provided with a rear magnetic attraction part 31. The front magnetic attraction part 21 and the rear magnetic attraction part 31 are magnetically attracted.

[0048] By providing the front magnetic attraction part 21 on the front shell 2 and the rear magnetic attraction part 31 on the rear shell 3, and magnetically attracting the front magnetic attraction part 21 and the rear magnetic attraction part 31, the magnetic attraction of the front shell 2 and the rear shell 3 is realized. Compared with the case that the front shell 2 and the rear shell 3 are made of a magnetic material as a whole, the front shell 2 and the rear shell 3 can avoid being attracted to the internal components of the filter 10, which affects the normal work of other internal components of the filter 10, and is conducive to improving the reliability of the filter 10.

[0049] In addition, by providing the front magnetic attraction part 21 on the front shell 2 and the rear magnetic attraction part 31 on the rear shell 3, and magnetically attracting the front magnetic attraction part 21 and the rear magnetic attraction part 31, the cost of the front shell 2 and the rear shell 3 can be reduced, thereby reducing the cost of the filter 10.

[0050] Of course, in other embodiments, the front shell 2 and the rear shell 3 can be made of a magnetic material as a whole, and the magnetism of the front shell 2 and the rear shell 3 is opposite, so that the front shell 2 and the rear shell 3 are magnetically attracted.

[0051] Optionally, the front magnetic attraction part 21 includes a front magnetic part 22, and the rear magnetic attraction part 31 includes a rear magnetic part 32.

[0052] The front magnetic part 22 and the rear magnetic part 32 can be magnetic blocks.

[0053] By magnetically attracting the front magnetic part 22 and the rear magnetic part 32, the magnetic attraction of the front shell 2 and the rear shell 3 is realized, which can improve the connection stability of the front shell 2 and the rear shell 3, thereby improving the reliability of the filter 10.

[0054] Of course, in other embodiments, a magnetic part can be arranged only on the front magnetic attraction part 21, and the rear magnetic attraction part 31 can be made of a magnetic conductive material; or a magnetic part can be arranged only on the rear magnetic attraction part 31, and the front magnetic attraction part 21 can be made of a magnetic conductive material. The magnetic part can be a magnetic block, and the magnetic conductive material can be iron or the like.

[0055] Optionally, the number of front magnetic parts 22 is a plurality, and the plurality of front magnetic parts 22 form a plurality of groups. The plurality of groups of front magnetic parts 22 are arranged in a spaced manner along the up-down direction.

[0056] For example, the number of front magnetic pieces 22 is five, and the five front magnetic pieces 22 form three groups, and the three groups of front magnetic pieces 22 are arranged in the up-down direction.

[0057] Optionally, as shown in Figure 3 the number of rear magnetic pieces 32 is a plurality, and the plurality of rear magnetic pieces 32 form a plurality of groups, and the plurality of groups of rear magnetic pieces 32 are arranged in the up-down direction.

[0058] For example, the number of rear magnetic pieces 32 is five, and the five rear magnetic pieces 32 form three groups, and the three groups of rear magnetic pieces 32 are arranged in the up-down direction. Among them, the number of rear magnetic pieces 32 in the uppermost group and the lowermost group is two, and the two rear magnetic pieces 32 in the same group are arranged on the left and right sides of the rear shell 3; the number of rear magnetic pieces 32 in the middle group is one.

[0059] Optionally, the front shell 2 is provided with a front mounting groove, and the front magnetic piece 22 is arranged in the front mounting groove.

[0060] Among them, the front magnetic piece 22 can be strongly installed in the front mounting groove, and the front magnetic piece 22 can also be integrally injection molded with the front shell 2.

[0061] By arranging the front magnetic piece 22 in the front mounting groove, not only can the connection stability between the front magnetic piece 22 and the front shell 2 be improved, and the reliability of the filter 10 can be improved; but also the front magnetic piece 22 can be avoided to be exposed, and the appearance beauty of the filter 10 can be improved.

[0062] Optionally, the front magnetic piece 22 corresponds to the front mounting groove one by one, and each front magnetic piece 22 is arranged in the corresponding front mounting groove.

[0063] Optionally, as shown in Figure 3 the rear shell 3 is provided with a rear mounting groove 33, and the rear magnetic piece 32 is arranged in the rear mounting groove 33.

[0064] Among them, the rear magnetic piece 32 can be strongly installed in the rear mounting groove 33, and the rear magnetic piece 32 can also be integrally injection molded with the rear shell 3.

[0065] By arranging the rear magnetic piece 32 in the rear mounting groove 33, not only can the connection stability between the rear magnetic piece 32 and the rear shell 3 be improved, and the reliability of the filter 10 can be improved; but also the rear magnetic piece 32 can be avoided to be exposed, and the appearance beauty of the filter 10 can be improved.

[0066] Optionally, the rear magnetic piece 32 corresponds to the rear mounting groove 33 one by one, and each rear magnetic piece 32 is arranged in the corresponding rear mounting groove 33.

[0067] Optionally, as shown in Figure 1 , Figure 5 and Figure 6 , the front shell 2 is butted against the rear shell 3.

[0068] By butting the front shell 2 against the rear shell 3, the shell of the filter 10 can be simplified, which is conducive to reducing the cost of the filter 10.

[0069] Of course, in other embodiments, a middle shell can also be arranged between the front shell 2 and the rear shell 3, wherein the middle shell is clamped between the front shell 2 and the rear shell 3.

[0070] Since the water inlet and outlet directions are different in different user's homes, for example, as shown in Figure 7 and Figure 8 , in some user's homes, the water inlet pipe 300 is arranged on the left side of the water outlet pipe 400, at this time, the front shell 100 faces the user, and the rear shell 200 faces away from the user. In some user's homes, the water inlet pipe 300 is arranged on the right side of the water outlet pipe 400, at this time, the filter needs to be installed by rotating 180°, resulting in that the front shell 100 faces away from the user, and the rear shell 200 faces the user, which is not convenient for the user to use and observe the filter.

[0071] Optionally, as shown in Figure 2 and Figure 3 , the outer peripheral contour of the front shell 2 and the outer peripheral contour of the rear shell 3 are symmetrically arranged, so that the front shell 2 and the rear shell 3 are interchangeable.

[0072] For example, the outer peripheral contour of the front shell 2 and the outer peripheral contour of the rear shell 3 are both semicylindrical and symmetrically arranged in the front-rear direction. Wherein, the front can be understood as the side facing the user, and the rear can be understood as the side facing away from the user.

[0073] By arranging the outer peripheral contour of the front shell 2 and the outer peripheral contour of the rear shell 3 to be symmetrical, the front shell 2 and the rear shell 3 can be interchangeable, so that the user can use and observe the filter 10. For example, as shown in Figure 5 and Figure 6 , no matter whether the water inlet pipe 20 is on the left side or the water outlet pipe 30 is on the left side, the front shell 2 can always face the user by installing the front shell 2 on the front side of the rear shell 3.

[0074] Wherein, the front shell 2 can be provided with product identification and the like, and the rear shell 3 is not provided with product identification.

[0075] Optionally, the filter body 1 is provided with a water inlet 11 and a water outlet 12, and the water inlet 11 and the water outlet 12 are oppositely arranged in the left-right direction of the filter 10. The front shell 2 and the rear shell 3 surround a water inlet hole 24 and a water outlet hole, and the water inlet 11 is arranged corresponding to the water inlet hole 24, and the water outlet 12 is arranged corresponding to the water outlet hole.

[0076] By forming the water inlet hole 24 and the water outlet hole between the front shell 2 and the rear shell 3, the filter body 1 can be arranged more inside the front shell 2 and the rear shell 3, which is beneficial to simplify the shell structure of the filter 10 and improve the appearance of the filter 10.

[0077] Of course, in other embodiments, the front shell 2 and the rear shell 3 can also be located on the lower side of the water inlet 11 and the water outlet 12.

[0078] Optionally, as shown in Figure 3 and Figure 4 , the front shell 2 is provided with a first groove 241 and a second groove, and the rear shell 3 is provided with a third groove 341 and a fourth groove 342, the first groove 241 and the third groove 341 are matched to form the water inlet hole 24, and the second groove and the fourth groove 342 are matched to form the water outlet hole.

[0079] Optionally, the diameters of the water inlet hole 24 and the water outlet hole are 30.5mm-32.5mm.

[0080] If the diameters of the water inlet hole 24 and the water outlet hole are too small, it will be difficult for the water inlet 11 and the water outlet 12 to pass through the corresponding holes, which is not conducive to the assembly of the front shell 2 and the rear shell 3; if the diameters of the water inlet hole 24 and the water outlet hole are too large, the structure inside the filter body 1 will be exposed through the hole, which will affect the appearance of the filter 10.

[0081] By setting the diameters of the water inlet hole 24 and the water outlet hole to be 30.5mm-32.5mm, on the one hand, it can ensure that the water inlet 11 and the water outlet 12 can pass through the corresponding holes, so that the front shell 2 and the rear shell 3 can be installed on the filter body 1; on the other hand, it can avoid the structure inside the filter body 1 being exposed through the hole, so as to improve the appearance of the filter 10. Optionally, as shown in Figures 2 to 6 , the front shell 2 is provided with an observation hole 23, and the filter 10 comprises a transparent piece 4 which is connected with the front shell 2 and arranged in the observation hole 23.

[0082] The observation hole 23 is arranged corresponding to the filter core of the filter body 1, and is used for observing the internal condition of the filter body 1, for example, the impurity condition inside the filter core.

[0083] By arranging the observation hole 23 on the front shell 2 and arranging the transparent piece 4 in the observation hole 23, the user can observe part of the filter body 1 through the transparent piece 4 without disassembling the front shell 2, which further facilitates the user to use the filter 10.

[0084] In addition, by arranging the front shell 2 and the rear shell 3 to be interchangeable, it can be ensured that the observation hole 23 is always directed to the user, so that the user can use the filter 10.

[0085] Optionally, the filter 10 further comprises a lower shell 5, which is arranged on the outer side of the filter body 1 and is located on the lower side of the front shell 2 and the rear shell 3. The lower shell 5 is provided with an operation panel 51, and the lower shell 5 is rotatable around the circumference of the filter body 1 to adjust the orientation of the operation panel 51.

[0086] As shown in Figure 5 and Figure 6 , by arranging the lower shell 5 to be rotatable around the circumference of the filter body 1, the water inlet 11 can be oriented towards the user by rotating the lower shell 5, regardless of whether the water outlet 12 is located on the left side or the right side of the water inlet 11. For example, as shown in Figures 2 to 6 , the operation panel 51 is the front face of the lower shell 5, and the operation panel 51 is always oriented towards the user by rotating the lower shell 5, so that the user can use the filter 10.

[0087] Optionally, the height of the front shell 2 and the height of the rear shell 3 are both 145mm-150mm.

[0088] For example, the height of the front shell 2 and the height of the rear shell 3 are both 146mm.

[0089] The front shell 2 and the rear shell 3 are mainly used to shield the structure of the filter core of the filter body 1, the water inlet 11, and the water outlet 12. If the height of the front shell 2 and the height of the rear shell 3 are too large, the height of the lower shell 5 will be small, which will affect the size of the operation panel 51. If the size of the front shell 2 and the size of the rear shell 3 are too small, the structure inside the filter body 1 will not be completely shielded, which will affect the appearance of the filter 10.

[0090] By arranging the height of the front shell 2 and the height of the rear shell 3 to be 145mm-150mm, the overall appearance of the filter 10 can be ensured to be aesthetically pleasing while ensuring that the size of the operation panel 51 is appropriate.

[0091] Optionally, the filter 10 is a pre-filter.

[0092] By arranging the filter 10 to be a pre-filter, the filter can be used to filter large particulate matter such as silt and iron filings from tap water, thereby improving the user experience of the pre-filter.

[0093] The filter 10 of the embodiments of the present disclosure, by setting the front shell 2 and the rear shell 3 to be separably suctioned on the front side and the rear side of the filter body 1, and setting the front shell 2 and the rear shell 3 to be symmetrical structures, so that the front shell 2 and the rear shell 3 can be interchanged. In addition, the lower shell 5 is set to be rotatable relative to the filter body 1, so that the water flow direction of the user's home is either from left to right or from right to left, so that the front shell 2 is always facing the user, and the front of the lower shell 5 is always facing the user, facilitating the use and observation of the filter 10 by the user, and being conducive to improving the user experience. In addition, it is also convenient for the assembly, disassembly, installation, dismounting and maintenance of the filter 10 and the like.

[0094] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0095] In addition, the terms "front shell" and "rear shell" are only for description purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "front shell" and "rear shell" can explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0096] In the present disclosure, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected or can communicate with each other; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances.

[0097] In the present disclosure, unless explicitly specified and limited, the front shell feature is "on" or "under" the rear shell feature can be that the front shell and rear shell features are in direct contact, or the front shell and rear shell features are in indirect contact through an intermediate medium. Moreover, the front shell feature is "above", "over" and "on top of" the rear shell feature can be that the front shell feature is directly above or obliquely above the rear shell feature, or just means that the front shell feature is higher in horizontal height than the rear shell feature. The front shell feature is "under", "below" and "underneath" the rear shell feature can be that the front shell feature is directly below or obliquely below the rear shell feature, or just means that the front shell feature is lower in horizontal height than the rear shell feature.

[0098] In the present disclosure, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. mean that the particular feature, structure, material or characteristic being described is included in at least one embodiment or example of the present disclosure. The illustrative appearances of the above terms in various places in the specification are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Also, the terminology used has the meaning provided by the location and the context, and the intention of the terminology is not to be limited to only related terms. In addition, those skilled in the art will further appreciate that the various embodiments or examples described herein can be implemented in any of a variety of ways.

[0099] Although the embodiments of the present disclosure have been shown and described above, it is to be understood that the above-described embodiments are exemplary, and are not to be construed as limiting the present disclosure, and the changes, modifications, replacements and variations of the above-described embodiments made by those skilled in the art are within the protection scope of the present disclosure.

Claims

1. A filter, characterized by, The filter comprises: a filter body; a front shell and a rear shell, the front shell being separably attracted to the front side of the filter body, and the rear shell being separably attracted to the rear side of the filter body.

2. The filter of claim 1, wherein, The front shell and the rear shell are attracted to each other.

3. The filter of claim 2, wherein, The outer peripheral contour of the front shell and the outer peripheral contour of the rear shell are symmetrically arranged so that the front shell and the rear shell are interchangeable.

4. The filter of claim 3, wherein, The filter body is provided with a water inlet and a water outlet, and the water inlet and the water outlet are oppositely arranged. The front shell and the rear shell form water inlet perforations and water outlet perforations therebetween, the water inlet corresponds to the water inlet perforations, and the water outlet corresponds to the water outlet perforations.

5. The filter of claim 4, wherein, The diameter of the water inlet perforations and the water outlet perforations is 30.5mm-32.5mm.

6. The filter of claim 4, wherein, The front shell is provided with an observation hole, and the filter comprises a transparent piece, which is connected to the front shell and arranged in the observation hole.

7. The filter of claim 2, wherein, The front shell and the rear shell are magnetically attracted to each other.

8. The filter of claim 7, wherein, The front shell is provided with a front magnetic attraction part, and the rear shell is provided with a rear magnetic attraction part, and the front magnetic attraction part and the rear magnetic attraction part are magnetically attracted to each other.

9. The filter of any one of claims 1-8, wherein, The filter further comprises a lower shell, which is arranged outside the filter body and below the front shell and the rear shell, and the lower shell is provided with an operation panel, and the lower shell is rotatable around the circumference of the filter body to adjust the orientation of the operation panel.

10. The filter of claim 9, wherein, The height of the front shell and the rear shell is 145mm-150mm.

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