Filtering device
By designing a filter device including the first, second and third filter parts, and using gas negative pressure to drive the liquid to filtration multiple times, the problems of poor filtration and high cost in the prior art are solved, and efficient and low-cost filtration effect is achieved.
Patent Information
- Application Number
- CN202422024757.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-08-20
AI Technical Summary
The existing organic belt filter cannot effectively filter fine powder, resulting in poor filtration or high cost.
A filter device is designed, including the first, second and third filter members, which generates negative pressure through the intake pipe, so that the liquid is filtered through these filter members in turn for multiple times, and the liquid is driven to filter by the negative pressure of gas, and the filtered liquid is discharged from the third filter member.
The impurities in the fine filtering liquid are achieved, the filtration effect is improved, and the filtration cost is reduced.
Smart Images
Figure CN223144256U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of filtering devices, in particular to a filtering device for filtering impurities in a liquid. Background Art
[0002] At present, in the machining field, fine powders are generated during machining. Mixing the fine powders into the cutting fluid or cutting oil will cause problems such as reduced cooling and lubrication effects and shortened tool life. Moreover, when the fine powders enter the precision parts of the machine tool along with the cutting oil and cutting fluid, it will also cause a larger error in the fixture accuracy and increased wear of the precision parts, thus unable to guarantee the machining quality of the product. Currently, it is usually filtered by a machine-mounted filter screen, but the machine-mounted filter screen cannot filter fine powders, easily causing the fine powders to block the machine-mounted filter screen and making the machine-mounted filter screen lose its filtering effect, or replacing the cutting oil, but the replacement cost is relatively high. Summary of the Utility Model
[0003] In view of the above situation, it is necessary to provide a filtering device to improve the filtering effect of impurities in the liquid and reduce the cost of filtering impurities in the liquid.
[0004] An embodiment of the utility model provides a filtering device for filtering a liquid, including: a box body; a filtering assembly, including a first filtering member, a second filtering member, and a third filtering member, the first filtering member, the second filtering member, and the third filtering member are spaced in the box body and are all used for filtering impurities in the liquid, the first filtering member has opposite first and second ends, the second filtering member has opposite third and fourth ends, the third filtering member has opposite fifth and sixth ends, the first end, the third end, and the fifth end are located on the same side of the first filtering member, the second filtering member, and the third filtering member, the second end is communicated with the third end, and the fourth end is communicated with the fifth end; a liquid inlet pipe, one end of the liquid inlet pipe is communicated with the first end, and the end of the liquid inlet pipe away from the first end is used for communicating with the liquid; a liquid outlet pipe, one end of the liquid outlet pipe is communicated with the sixth end; an air inlet pipe, the air inlet pipe is respectively communicated with the first end, the third end, and the fifth end, air is introduced into the first filtering member, the second filtering member, and the third filtering member through the air inlet pipe, negative pressure can be generated in the first filtering member, the second filtering member, and the third filtering member, and the liquid communicated with the liquid inlet pipe sequentially enters the first filtering member, the second filtering member, and the third filtering member for filtering, and the filtered liquid is discharged from the liquid outlet pipe communicated with the third filtering member.
[0005] In some possible embodiments, there are a plurality of the second filter elements, and the plurality of second filter elements are arranged side by side. The two second filter elements located on both sides are respectively arranged close to the first filter element and the third filter element. The fourth end of each second filter element communicates with the third end of the adjacent second filter element. The third end of the second filter element close to the first filter element communicates with the second end of the first filter element. The fourth end of the second filter element close to the third filter element communicates with the fifth end of the third filter element.
[0006] In some possible embodiments, the filter assembly further includes: a plurality of ventilation pipes, which are respectively arranged corresponding to the first filter element, the plurality of second filter elements, and the third filter element. One end of each ventilation pipe communicates with the intake pipe, and the other end of each ventilation pipe communicates with the first filter element or the second filter element or the third filter element.
[0007] In some possible embodiments, the filter assembly further includes: a first connecting pipe, with both ends of the first connecting pipe communicating with the second end and the third end of the second filter element close to the first filter element respectively, and the liquid inlet pipe communicates with the first connecting pipe; a plurality of second connecting pipes, with both ends of the second connecting pipes communicating with the fourth end and the third end of the adjacent second filter element respectively; a third connecting pipe, with both ends of the third connecting pipe communicating with the fourth end of the second filter element close to the third filter element and the fifth end of the third filter element respectively.
[0008] In some possible embodiments, the intake pipe includes: a main air pipe, with one end of the main air pipe for communicating with the outside; a plurality of branch air pipes, which are respectively arranged corresponding to the first filter element, the plurality of second filter elements, and the third filter element. One ends of the plurality of branch air pipes communicate with the other end of the main air pipe, and the ends of the plurality of branch air pipes far from the main air pipe communicate with the plurality of ventilation pipes respectively.
[0009] In some possible embodiments, each branch air pipe includes: a first pipeline, which is perpendicular to the main air pipe, and one end of the first pipeline communicates with the main air pipe; a second pipeline, which is parallel to the main air pipe, and both ends of the second pipeline communicate with the end of the first pipeline far from the main air pipe and the corresponding ventilation pipe respectively.
[0010] In some possible embodiments, the filter device further includes: a fixing member, which is arranged in the box body. One ends of the plurality of second pipelines, one ends of the plurality of ventilation pipes, one end of the first connecting pipe, one end of the second connecting pipe, one end of the third connecting pipe, and one end of the liquid inlet pipe all extend into the fixing member.
[0011] In some possible embodiments, the first filter element, the second filter element, and the third filter element each include: a filter housing that communicates with the corresponding ventilation pipe, and a receiving cavity that communicates with the ventilation pipe is provided inside the filter housing; a filter element frame that is disposed inside the receiving cavity, and a filtering space that communicates with the corresponding ventilation pipe is provided inside the filter element frame; a filtering portion that is disposed on the outer periphery of the filter element frame to filter impurities in the liquid.
[0012] In some possible embodiments, the first filter element, the second filter element, and the third filter element each include: a filter housing that communicates with the ventilation pipe, and a receiving cavity that communicates with the ventilation pipe is provided inside the filter housing; a filter element frame that is detachably disposed inside the receiving cavity, and the space inside the filter element frame communicates with the ventilation pipe; a filtering portion that is disposed on the outer periphery of the filter element frame to filter impurities in the liquid.
[0013] In some possible embodiments, the filter housing is snap-connected to the filter element frame.
[0014] In some possible embodiments, the filter housing includes a filter cover, a bottom plate, and a locking member. The filter cover communicates with the corresponding ventilation pipe. The filter cover is rotatably connected to the filter cover and seals the opening of the filter cover. The locking member is fixedly connected to the bottom plate and is used to rotate the bottom plate into the filter cover and seal the opening of the filter cover when a force is applied; the filtering portion includes a screen and a dust-absorbing cloth. The screen is sleeved on the outer periphery of the filter element frame, and the dust-absorbing cloth is sleeved on the outer periphery of the screen.
[0015] For the above-mentioned filtering device, air is introduced into the first filter element, the second filter element, and the third filter element through an air inlet pipe. Negative pressure can be generated inside the first filter element, the second filter element, and the third filter element, and the liquid communicated with the liquid inlet pipe sequentially enters the first filter element, the second filter element, and the third filter element for filtering. The filtered liquid is discharged from the liquid outlet pipe communicated with the third filter element. Since negative pressure generated by the gas drives the liquid to be filtered multiple times, impurities in the liquid can be finely filtered, the filtering effect is better, the energy consumption is lower, and the cost is effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a schematic perspective view of a filtering device according to an embodiment of the present invention.
[0017] Figure 2 is Figure 1 a schematic cross-sectional view of the shown filtering device along the A-A direction.
[0018] Figure 3 is Figure 1 a schematic perspective view of the filter assembly, the air inlet pipe, the liquid inlet pipe, and the liquid outlet pipe in the shown filtering device.
[0019] Figure 4 Is Figure 3 The schematic cross-sectional structure diagram of the first filter element in the shown filter assembly along the B-B direction.
[0020] Description of main component symbols
[0021] Filter device 100
[0022] Box body 10
[0023] Outer shell 11
[0024] Accommodation cavity 112
[0025] Opening 114
[0026] Opening and closing door 12
[0027] Filter assembly 20
[0028] First filter element 21
[0029] First end 211
[0030] Second end 212
[0031] Filter housing 213
[0032] Receiving cavity 2131
[0033] Filter cover 2132
[0034] Bottom plate 2133
[0035] Locking member 2134
[0036] Filter element frame 214
[0037] Filter part 215
[0038] Screen 2151
[0039] Dust-absorbing cloth 2152
[0040] Second filter element 22
[0041] Third end 221
[0042] Fourth end 222
[0043] Third filter element 23
[0044] Fifth end 231
[0045] Sixth end 232
[0046] Vent pipe 24
[0047] First connecting pipe 25
[0048] The second connecting pipe 26
[0049] The third connecting pipe 27
[0050] The intake pipe 30
[0051] The main air pipe 31
[0052] The bronchus pipe 32
[0053] The first pipeline 321
[0054] The second pipeline 322
[0055] The liquid inlet pipe 40
[0056] The liquid outlet pipe 50
[0057] The fixing part 60 Specific implementation manners
[0058] The following is a detailed description of the implementation manners of the present utility model. The examples of the implementation manners are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The implementation manners described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.
[0059] In the description of the present application, it should be understood that the terms indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application. In addition, in the description of the present application, it should be noted that the meaning of "a plurality of" is two or more, unless otherwise specifically defined.
[0060] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the term "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, an electrical connection, or a connection that can communicate with each other. It can be directly connected, or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to specific circumstances.
[0061] The following further describes the embodiments of the present utility model in conjunction with the accompanying drawings of the specification.
[0062] Please refer to Figure 1 、 Figure 2 andFigure 3 , in an embodiment of the present utility model, a filtering device 100 is proposed, which is used to filter impurities in a liquid. The impurities can be fine powders, and the liquid can be at least one of cutting fluid and cutting oil. The filtering device 100 includes a box body 10, a filtering component 20, an air inlet pipe 30, a liquid inlet pipe 40 and a liquid outlet pipe 50.
[0063] The filtering component 20 includes a first filtering element 21, a second filtering element 22 and a third filtering element 23. The first filtering element 21, the second filtering element 22 and the third filtering element 23 are arranged at intervals on the box body 10 and are all used to filter impurities in the liquid. The first filtering element 21 has opposite first end 211 and second end 212. The second filtering element 22 has opposite third end 221 and fourth end 222. The third filtering element 23 has opposite fifth end 231 and sixth end 232. The first end 211, the third end 221 and the fifth end 231 are located on the same side of the first filtering element 21, the second filtering element 22 and the third filtering element 23. The second end 212 is communicated with the third end 221, and the fourth end 222 is communicated with the fifth end 231. The air inlet pipe 30 is respectively communicated with the first end 211, the third end 221 and the fifth end 231. One end of the liquid inlet pipe 40 is communicated with the first end 211, and the other end of the liquid inlet pipe 40 away from the first end 211 is used to be communicated with the liquid. One end of the liquid outlet pipe 50 is communicated with the sixth end 232, and the other end of the liquid outlet pipe 50 is used to be communicated with a storage device (not shown in the figure). Wherein, air is introduced into the first filtering element 21, the second filtering element 22 and the third filtering element 23 through the air inlet pipe 30, negative pressure can be generated in the first filtering element 21, the second filtering element 22 and the third filtering element 23, and the liquid communicated with the liquid inlet pipe 40 sequentially enters the first filtering element 21, the second filtering element 22 and the third filtering element 23 for filtering, and the filtered liquid is discharged from the liquid outlet pipe 50 communicated with the third filtering element 23.
[0064] Please refer to Figure 1 and Figure 2 , the box body 10 includes a housing 11 and an opening and closing door 12. The housing 11 is generally in the shape of a cuboid. The housing 11 has a receiving cavity 112 and an opening 114 communicated with the receiving cavity 112. Please refer to Figure 3 , the air inlet pipe 30, the liquid inlet pipe 40 and the liquid outlet pipe 50 are all located in the receiving cavity 112, and one end of the air inlet pipe 30 penetrates through the housing 11; the opening and closing door 12 is arranged at the opening 114 to open or close the opening 114. By providing the housing 11 and the opening and closing door 12, the filtering component 20 can be installed and protection for the filtering component 20 can be formed.
[0065] Please refer to Figure 3, there are multiple second filters 22. In this embodiment, there are 6 second filters 22. It can be understood that in other embodiments, the number of second filters 22 can be 1 or 7, but is not limited thereto. The multiple second filters 22 are arranged side by side. Among them, the first filter 21, the multiple second filters 22 and the third filter 23 are arranged in a circular pattern. The two second filters 22 located on both sides are respectively arranged close to the first filter 21 and the third filter 23. The fourth end 222 of each second filter 22 communicates with the third end 221 of the adjacent second filter 22. The third end 221 of the second filter 22 close to the first filter 21 communicates with the second end 212 of the first filter 21. The fourth end 222 of the second filter 22 close to the third filter 23 communicates with the fifth end 231 of the third filter 23. By providing multiple second filters 22, multiple filtrations of the liquid can be achieved, and the filtration effect is better. By arranging the first filter 21, the multiple second filters 22 and the third filter 23 in a circular pattern, the occupied space of the filtration assembly 20 can be reduced, and the arrangement is relatively compact.
[0066] The filtration assembly 20 further includes multiple air vent pipes 24. The multiple air vent pipes 24 are respectively arranged corresponding to the first filter 21, the multiple second filters 22 and the third filter 23. One end of each air vent pipe 24 communicates with the intake pipe 30, and the other end of each air vent pipe 24 communicates with the first filter 21 or the second filter 22 or the third filter 23. By providing multiple air vent pipes 24, the gas introduced into the intake pipe 30 can flow evenly into the multiple air vent pipes 24 and generate negative pressure, so that the liquid flows into the first filter 21, the multiple second filters 22 and the third filter 23 in sequence under the action of the negative pressure for filtration.
[0067] The filtration assembly 20 further includes a first connecting pipe 25, multiple second connecting pipes 26 and a third connecting pipe 27. The two ends of the first connecting pipe 25 respectively communicate with the second end 212 and the third end 221 of the second filter 22 close to the first filter 21. The liquid inlet pipe 40 communicates with the first connecting pipe 25. The two ends of the second connecting pipe 26 respectively communicate with the fourth end 222 of the second filter 22 and the third end 221 of the adjacent second filter 22. The two ends of the third connecting pipe 27 respectively communicate with the fourth end 222 of the second filter 22 close to the third filter 23 and the fifth end 231 of the third filter 23. By providing the first connecting pipe 25, the multiple second connecting pipes 26 and the third connecting pipe 27, the connection between the first filter 21, the multiple second filters 22 and the third filter 23 can be realized, as well as the connection between the first filter 21 and the liquid inlet pipe 40, and the connection between the third filter 23 and the liquid outlet pipe 50.
[0068] The intake pipe 30 includes a main pipe 31 and a plurality of branch pipes 32. One end of the main pipe 31 is used for communicating with the outside; the plurality of branch pipes 32 are respectively arranged corresponding to the first filter element 21, the plurality of second filter elements 22 and the third filter element 23. One ends of the plurality of branch pipes 32 are communicated with the other end of the main pipe 31, and the ends of the plurality of branch pipes 32 far from the main pipe 31 are respectively communicated with the plurality of ventilation pipes 24. By providing the main pipe 31 and the plurality of branch pipes 32, the gas entering the main pipe 31 can uniformly flow into the plurality of ventilation pipes 24 through the plurality of branch pipes 32 and generate negative pressure, so that the liquid flows into the first filter element 21, the plurality of second filter elements 22 and the third filter element 23 in sequence under the action of the negative pressure for filtration.
[0069] Each branch pipe 32 includes a first pipeline 321 and a second pipeline 322. The first pipeline 321 is arranged perpendicular to the main pipe 31, and one end of the first pipeline 321 is communicated with the main pipe 31; the second pipeline 322 is arranged parallel to the main pipe 31, and both ends of the second pipeline 322 are respectively communicated with the end of the first pipeline 321 far from the main pipe 31 and the corresponding ventilation pipe 24. By providing the first pipeline 321 perpendicular to the main pipe 31 and the second pipeline 322 parallel to the main pipe 31, the occupied space of the branch pipe 32 can be reduced, and the layout of the intake pipe 30 can be made compact.
[0070] The filtering device 100 further includes a fixing member 60. The fixing member 60 is a cylindrical barrel-shaped structure. The fixing member 60 is arranged in the box body 10. One ends of the plurality of second pipelines 322, one ends of the plurality of ventilation pipes 24, one end of the first connecting pipe 25, one end of the second connecting pipe 26, one end of the third connecting pipe 27, and one end of the liquid inlet pipe 40 all extend into the fixing member 60. By providing the fixing member 60, parts of the plurality of second pipelines 322, parts of the plurality of ventilation pipes 24, parts of the first connecting pipe 25, parts of the second connecting pipe 26, parts of the third connecting pipe 27, and parts of the liquid inlet pipe 40 can be accommodated, and the connection stability can be improved.
[0071] The structures of the first filter element 21, the second filter element 22 and the third filter element 23 are the same. Here, the first filter element 21 is taken as an example for detailed description. Please refer to Figure 4 , the first filter element 21 includes a filter housing 213, a filter element frame 214 and a filtering part 215. The filter housing 213 is communicated with the corresponding ventilation pipe 24, and a receiving cavity 2131 communicated with the ventilation pipe 24 is provided in the filter housing 213; the filter element frame 214 is arranged in the receiving cavity 2131, and the space in the filter element frame 214 is communicated with the corresponding ventilation pipe 24; the filtering part 215 is arranged on the outer periphery of the filter element frame 214 to filter fine powder in the liquid. Among them, the filter element frame 214 is a cylindrical frame-shaped structure.
[0072] Specifically, the filter housing 213 includes a filter cover 2132, a bottom plate 2133, and a locking member 2134. The bottom plate 2133 is rotatably connected to the filter cover 2132 and seals the opening of the filter cover 2132. The filter cover 2132 communicates with the corresponding air vent pipe 24. The locking member 2134 is fixedly connected to the bottom plate 2133 and is used to rotate the bottom plate 2133 into the filter cover 2132 and seal the opening of the filter cover 2132 when a force is applied. Among them, the locking member 2134 can be a hexagonal bolt integrated with the bottom plate 2133.
[0073] The filtering part 215 includes a screen 2151 and a dust suction cloth 2152. The screen 2151 is sleeved on the outer periphery of the filter element frame 214, and the dust suction cloth 2152 is sleeved on the outer periphery of the screen 2151. It can be understood that the dust suction cloth 2152 can be one layer or three layers, and the specific number of layers can be set according to actual needs. During use, the liquid entering the filter element frame 214 through the air vent pipe 24 can flow into the receiving cavity 2131 after being filtered by the filtering part 215, and is discharged into the second filter element 22 through the first connecting pipe 25 for further filtering.
[0074] During disassembly, first tighten and rotate the locking member 2134 with a hexagonal wrench to remove the bottom plate 2133 from the filter cover 2132. Then, take out the filter element frame 214 from the filter housing 213. Next, remove the filtering part 215, that is, the screen 2151 and the dust suction cloth 2152, from the filter element frame 214, clean the filter element frame 214, and install the clean screen 2151 and dust suction cloth 2152 on the filter element frame 214. Then, install the filter element frame 214 into the filter housing 213, and finally install the bottom plate 2133 on the filter cover 2132 with a hexagonal wrench.
[0075] The filter housing 213 is snap-connected to the filter element frame 214. In this way, the disassembly of the filter housing 213 and the filter element frame 214 can be facilitated, which is convenient for cleaning the filter element frame 214. It can be understood that in other embodiments, the filter housing 213 and the filter element frame 214 can also be fixedly connected, such as by welding. However, it is not limited thereto.
[0076] The implementation process of the filtering device 100 in the embodiment of the present application is as follows:
[0077] Connect the intake pipe 30 to the ventilation device, connect the liquid inlet pipe 40 to the liquid, and connect the liquid outlet pipe 50 to the reservoir; pass high-pressure gas into the intake pipe 30 through the ventilation device, and the gas entering the main pipe 31 of the intake pipe 30 flows evenly into a plurality of ventilation pipes 24 through a plurality of branch pipes 32 and generates negative pressure. Under the action of the negative pressure, the liquid first flows into the filter element frame 214 of the first filter element 21 through the liquid inlet pipe 40. The liquid in the filter element frame 214 can flow into the receiving cavity 2131 after being filtered by the filtering part 215, and is discharged to the second filter element 22 through the first connecting pipe 25. After being filtered by the second filter element 22, it flows into other second filter elements 22 and the third filter element 23 in sequence for filtration, and then flows into the reservoir through the liquid outlet pipe 50 after filtration.
[0078] For the above-mentioned filtering device 100, air is passed into the first filter element 21, the second filter element 22 and the third filter element 23 through the intake pipe 30. Negative pressure can be generated in the first filter element 21, the second filter element 22 and the third filter element 23, and the liquid communicated with the liquid inlet pipe 40 enters the first filter element 21, the second filter element 22 and the third filter element 23 in sequence for filtration. The filtered liquid is discharged from the liquid outlet pipe 50 communicated with the third filter element 23. Since negative pressure is generated by the gas to drive the liquid to be filtered multiple times, fine dust in the liquid can be filtered finely, the filtering effect is better, and the energy consumption is lower, effectively reducing the cost.
[0079] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to cover all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention.
[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and not to limit them. Although the present application has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present application.
Claims
1. A filtering device for filtering impurities in a liquid, characterized in that, Comprising: A box body; A filtering component, including a first filter element, a second filter element and a third filter element. The first filter element, the second filter element and the third filter element are spaced in the box body and are all used for filtering impurities in the liquid. The first filter element has opposite first and second ends. The second filter element has opposite third and fourth ends. The third filter element has opposite fifth and sixth ends. The first end, the third end and the fifth end are located on the same side of the first filter element, the second filter element and the third filter element. The second end is communicated with the third end, and the fourth end is communicated with the fifth end; A liquid inlet pipe, one end of which is communicated with the first end, and the other end of the liquid inlet pipe away from the first end is used for communicating with the liquid; A liquid outlet pipe, one end of which is communicated with the sixth end; An air inlet pipe, which is respectively communicated with the first end, the third end and the fifth end. Air is introduced into the first filter element, the second filter element and the third filter element through the air inlet pipe. Negative pressure can be generated in the first filter element, the second filter element and the third filter element, and the liquid communicated with the liquid inlet pipe sequentially enters the first filter element, the second filter element and the third filter element for filtering, and the filtered liquid is discharged from the liquid outlet pipe communicated with the third filter element.
2. The filtering device according to claim 1, wherein There are multiple second filter elements, and the multiple second filter elements are arranged side by side. The two second filter elements on both sides are respectively arranged close to the first filter element and the third filter element. The fourth end of each second filter element is communicated with the third end of the adjacent second filter element. The third end of the second filter element close to the first filter element is communicated with the second end of the first filter element. The fourth end of the second filter element close to the third filter element is communicated with the fifth end of the third filter element.
3. The filtering device according to claim 2, characterized in that, The filtering component further includes: Multiple air vent pipes, which are respectively arranged corresponding to the first filter element, the multiple second filter elements and the third filter element. One end of each air vent pipe is communicated with the air inlet pipe, and the other end of each air vent pipe is communicated with the first filter element or the second filter element or the third filter element.
4. The filtering device according to claim 3, characterized in that, The filtering component further includes: A first connecting pipe, both ends of which are respectively communicated with the second end and the third end of the second filter element close to the first filter element, and the liquid inlet pipe is communicated with the first connecting pipe; Multiple second connecting pipes, both ends of which are respectively communicated with the fourth end of the second filter element and the third end of the adjacent second filter element; A third connecting pipe, both ends of which are respectively communicated with the fourth end of the second filter element close to the third filter element and the fifth end of the third filter element.
5. The filtering device according to claim 4, wherein The air inlet pipe includes: A main air pipe, one end of which is used for communicating with the outside; Multiple bronchi are respectively arranged corresponding to the first filter element, multiple second filter elements and the third filter element. One ends of the multiple bronchi are communicated with the other end of the main trachea, and the other ends of the multiple bronchi far away from the main trachea are respectively communicated with the multiple ventilation pipes.
6. The filtering device according to claim 5, wherein Each of the bronchi includes: A first pipeline, which is arranged perpendicular to the main trachea, and one end of the first pipeline is communicated with the main trachea; A second pipeline, which is arranged parallel to the main trachea, and both ends of the second pipeline are respectively communicated with the end of the first pipeline far away from the main trachea and the corresponding ventilation pipe.
7. The filtering device according to claim 6, characterized in that, The filtering device further includes: A fixing member, which is arranged in the box body. One ends of the multiple second pipelines, one ends of the multiple ventilation pipes, one end of the first communication pipe, one end of the second communication pipe, one end of the third communication pipe, and one end of the liquid inlet pipe all extend into the fixing member.
8. The filtering device according to claim 7, wherein The first filter element, the second filter element and the third filter element all include: A filter shell, which is communicated with the corresponding ventilation pipe, and a receiving cavity communicated with the ventilation pipe is arranged in the filter shell; A filter element frame, which is arranged in the receiving cavity, and the space in the filter element frame is communicated with the corresponding ventilation pipe; A filtering part, which is arranged on the outer periphery of the filter element frame to filter liquid.
9. The filtering device according to claim 8, characterized in that The filter shell is snap-connected with the filter element frame.
10. The filtering device according to claim 8, characterized in that The filter shell includes a filter cover, a bottom plate and a locking member. The filter cover is communicated with the corresponding ventilation pipe, the filter cover is rotatably connected with the filter cover and blocks the opening of the filter cover. The locking member is fixedly connected with the bottom plate and is used for rotating the bottom plate into the filter cover and blocking the opening of the filter cover when being stressed; the filtering part includes a screen and a dust-absorbing cloth. The screen is sleeved on the outer periphery of the filter element frame, and the dust-absorbing cloth is sleeved on the outer periphery of the screen.