Air filtering device

Abstract

The utility model discloses an air filtering device. The air filtering device comprises a dust collection box, an exhaust pipe, a filtering structure and an upper cover, the filtering structure comprises a filtering assembly and an air inlet cover; the filtering assembly comprises a mounting platform and an upper air pipe, and a plurality of lower air pipes are arranged on the mounting platform; wherein a spiral flow guide part is arranged on the outer circumference of the upper air pipe, and the upper air pipe is inserted and fixed in the lower air pipe. Through the unique design of the upper air pipe and the lower air pipe, the assembly process is simplified, and the filtering effect is enhanced. A spiral flow guide part is arranged on the outer circumference of the upper air pipe and is directly inserted into the lower air pipe to ensure stable installation and improve the filtering efficiency.

Description

Technical Field

[0001] The utility model relates to the field of air filtration, in particular to an air filtration device used for pneumatic machinery and internal combustion machinery. Background Art

[0002] Air filters are mainly used in pneumatic machinery, internal combustion machinery and other fields. Their function is to provide clean air for these mechanical equipment to prevent them from inhaling air with impurities and particles during operation, which increases the probability of abrasion and damage. The main components of an air filter are the filter element and the housing. The filter element is the main filtering part and is responsible for filtering the gas, while the housing is the external structure that provides necessary protection for the filter element. The working requirements of an air filter are to be able to undertake high-efficiency air filtering work, not to add too much resistance to air flow, and to be able to work continuously for a long time.

[0003] Chinese patent document CN214437253U discloses a gas separation device, characterized in that it includes a separation chamber, a gas collecting chamber and an exhaust pipe, the clean gas outlet of the separation chamber is connected to the gas collecting chamber, the gas collecting chamber is connected to the exhaust pipe, a fan is arranged in the gas collecting chamber, the gas purified by the separation chamber flows into the gas collecting chamber from the clean gas outlet, the fan can be driven to rotate, and the gas in the gas collecting chamber is discharged from the exhaust pipe. The utility model adopts an air intake system with air intake from four sides to increase the air intake volume, meet the air load required by large vehicles, and perform double filtration at the same time, so the filtering effect is better. The separation chamber adopts a cyclone dust removal to remove large and small particles of dust, and the optimized bottom structure can better prevent dust backflow, thereby increasing the life of the filter device. However, the prior art has a complex structure and cumbersome assembly steps, which can easily lead to poor filtering effect. Utility Model Content

[0004] In order to solve the problem of complicated air filter structure and cumbersome assembly in the prior art, the utility model provides an air filtering device, including a dust box, an exhaust duct, a filtering structure and an upper cover; the filtering structure includes a filtering assembly and an air inlet cover; the filtering assembly includes a mounting platform and an upper air duct, and a plurality of lower air ducts are arranged on the mounting platform; wherein a spiral guide portion is integrally formed on the outer circumference of the upper air duct, and the upper air duct is inserted into and fixed in the lower air duct.

[0005] In the prior art, gas separation is performed by combining a cyclone device, a downwind duct and an upwind duct. During assembly, the cyclone device needs to be installed on the upwind duct first, and then the upwind duct with the cyclone device installed is inserted into the downwind duct. The structure is complex and the assembly is cumbersome. Furthermore, in order to ensure the normal operation of the separation device, the cyclone device must be firmly installed on the upwind duct.

[0006] Compared with the prior art, in the present solution, the spiral guide part is directly arranged on the upper air duct. This method not only eliminates the step of installing the spiral guide part on the upper air duct, but also ensures the stable installation of the spiral guide part on the upper air duct. During assembly, it is only necessary to directly insert the upper air duct into the lower air duct to complete the installation of the filtering structure. The structure is simpler and the assembly process is also simplified.

[0007] Preferably, a plug-in groove is provided in the axial direction on the upper part of the outer circumference of the lower air duct, and a plug-in part extending axially is provided on the upper part of the spiral guide part, and the top of the plug-in groove is flush with the top of the plug-in part and is lower than the length of the upper air duct. In this solution, the assembly of the lower air duct and the upper air duct is realized by plugging, which also facilitates the installation of the air inlet cover, has a simple structure, and further simplifies the assembly process.

[0008] Preferably, a support portion is provided at the bottom of the plug slot to press the plug portion against the side of the plug slot. This solution can ensure the stable installation of the upper air duct in the lower air duct and has a simple structure.

[0009] Preferably, the upper air duct is located at the upper part of the lower air duct, and the lower part of the lower air duct is arranged to converge inwards. This solution can enhance the separation effect of impurities and has a simple structure.

[0010] Preferably, the top surface of the air inlet cover is provided with a mounting hole matching the upper air duct. This solution facilitates the installation of the air inlet cover.

[0011] Preferably, the side wall of the air inlet cover is provided with a grille, and the bars of the grille are arranged upwardly and tilted from the outside to the inside. The arrangement of the grille in this solution can filter larger particles of impurities in the air, improve the filtering effect, and also guide the air, and the structure is simple.

[0012] Preferably, the dust collecting box is provided with a plurality of dust collecting parts, and the dust collecting parts are provided with dust discharge ports inclined downward. This solution can ensure the collection effect of impurities.

[0013] Preferably, the dust outlet is provided with a detachable cover. This solution facilitates the cleaning of impurities.

[0014] Preferably, it also includes a filter sleeve assembly, the air inlet of the filter sleeve assembly is connected to the air outlet of the exhaust pipe, the side wall of the filter sleeve assembly is provided with an air outlet, and the air duct between the air inlet and the air outlet is provided with multiple layers of filter elements. This solution can achieve multi-stage filtration, further enhancing the filtration effect.

[0015] Preferably, the filter sleeve assembly includes an air duct and a sleeve disposed on the air duct, the air inlet is located at the upper part of the air duct, the lower part of the air duct is provided with an outlet, the filter is disposed inside the sleeve, and the filter is provided with a through hole for the air duct to pass through. This solution further enhances the filtering effect and has a simple structure.

[0016] Preferably, the sleeve comprises a plurality of removable and spliced ​​cylinders, and the air outlet is arranged on the side wall of the uppermost cylinder. This solution further enhances the filtering effect and has a simple structure.

[0017] Preferably, a filter cover opposite to the outlet is provided at the bottom of the bottommost cylinder. This solution further enhances the filtering effect and has a simple structure.

[0018] Preferably, the air outlet is provided with a mounting portion. This solution facilitates the connection of the air filter with other devices and has a simple structure.

[0019] Preferably, a fan is provided between the upper cover and the top surface of the air inlet cover, and the fan is arranged opposite to the air inlet of the exhaust pipe. This solution can ensure the flow of air inside, thereby ensuring the normal filtering operation, and has a simple structure.

[0020] Preferably, the dust box is provided with supporting feet. In this solution, the stable supporting function of the dust box on the air filter device can be enhanced, and the mold opening cost of the dust box can be convenient, which can reduce the production cost of the air filter device.

[0021] The utility model has the following beneficial effects:

[0022] 1. The step of installing the spiral guide part on the upper air duct is eliminated, which also ensures the stable installation of the spiral guide part on the upper air duct; during assembly, the installation of the filter structure can be completed by directly inserting the upper air duct into the lower air duct, which has a simpler structure and simplifies the assembly process.

[0023] 2. It can realize multi-stage filtration and enhance the separation effect of impurities.

[0024] 3. Ensure the flow of air inside to ensure the normal filtering operation, with a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of Example 1 of the air filter device of the utility model;

[0026] Figure 2 for Figure 1 Middle AA section view;

[0027] Figure 3 for Figure 1 The structural diagram of the installation platform;

[0028] Figure 4 for Figure 3 Cross-sectional view of the middle BB;

[0029] Figure 5 It is a structural schematic diagram of the upper air duct;

[0030] Figure 6 This is an exploded view of the filter structure;

[0031] Figure 7 is a schematic diagram of the filtering structure;

[0032] Figure 8 for Figure 7 Middle CC section view;

[0033] Fig. 9 It is a structural schematic diagram of the air inlet cover;

[0034] Fig.10 for Fig. 9 Bottom view of

[0035] Fig.11 It is a schematic diagram of the structure of the dust collection box;

[0036] Fig.12 for Fig.11 A top view of

[0037] Fig.13 for Fig.11 Middle DD section view;

[0038] Fig.14 This is a schematic diagram of Example 2 of the air filter device of the utility model;

[0039] Fig.15 for Fig.14 Sectional view of the EE part;

[0040] Fig.16 This is a schematic diagram of the dust box in Example 3 of the air filter device of the utility model. DETAILED DESCRIPTION

[0041] The following is further described in detail through specific implementation methods:

[0042] 1. Definition

[0043] Converging inwards: refers to the diameter gradually becoming smaller.

[0044] Grille: It is composed of parallel bars and vertical connecting bars in a grid shape.

[0045] Buckle: An item that fastens two items together.

[0046] 2. The reference numerals in the drawings of the specification include: upper cover 1, exhaust duct 10, air inlet cover 2, mounting hole 21, mounting platform 3, lower air duct 31, supporting portion 32, dust collecting box 4, sealing cover 41, supporting foot 42, filter sleeve assembly 5, sleeve 50, filter element 51, filter cover 52, air guide duct 53, buckle 6, mounting portion 7, upper air duct 8, spiral guide portion 81, plug-in portion 82, fan 9.

[0047] Example 1

[0048] Basically as attached Figure 1-Figure 13 As shown: an air filtering device, including a dust collecting box 4, an exhaust pipe 10, a filtering structure, an upper cover 1 and a filtering sleeve assembly 5.

[0049] The filter structure includes a filter assembly and an air inlet cover 2; the filter assembly includes a mounting platform 3 and an upper air duct 8, and a plurality of lower air ducts 31 are arranged on the mounting platform 3. The upper air duct 8 is located at the upper part of the lower air duct 31, and the lower part of the lower air duct 31 is arranged to converge inwards.

[0050] The upper air duct 8 is provided with a spiral guide portion 81 on its outer circumference, and the upper air duct 8 is inserted and fixed in the lower air duct 31. Specifically, a plug-in groove is provided in the axial direction on the upper part of the outer circumference of the lower air duct 31, and an axially extending plug-in portion 82 is provided on the upper part of the spiral guide portion 81. The top of the plug-in groove is flush with the top of the plug-in portion 82 and is lower than the length of the upper air duct 8. The bottom of the plug-in groove is provided with a support portion 32 that can press the plug-in portion 82 against the side of the plug-in groove. The mounting platform 3 is as shown in FIG. Figure 3 and Figure 4 As shown, the upper air duct 8 is as Figure 5 As shown, the upper air duct 8 is located on the upper part of the lower air duct 31 and is firmly connected through the spiral guide part 81. This design simplifies the installation steps and improves the filtering efficiency.

[0051] The top surface of the air inlet cover 2 is provided with a mounting hole 21 matching the upper air duct. The side wall of the air inlet cover 2 is provided with a grille, and the bars of the grille are arranged upwardly from the outside to the inside.

[0052] The dust box 4 is provided with a plurality of dust collecting parts, each of which is provided with a dust discharge port inclined downward, and the dust discharge port is provided with a detachable cover 41. In this solution, the cover 41 can be inserted into the dust discharge port and can also be pulled out from the dust discharge port. In this embodiment, the dust box 4 is provided with four dust collecting parts, and the four dust collecting parts are evenly spaced on the dust box 4.

[0053] The filter sleeve assembly 5 includes an air duct 53 and a sleeve 50 which is sleeved on the air duct 53. The air inlet is located at the upper part of the air duct 53, and the lower part of the air duct 53 is provided with an outlet. The filter element 51 is arranged inside the sleeve 50, and the filter element 51 is provided with a through hole for the air duct 53 to pass through. The sleeve 50 includes multiple layers of detachable and spliced ​​cylinders, and the air outlet is arranged on the side wall of the cylinder of the uppermost layer. In this embodiment, the filter element 51 is a filter baffle with a filter screen arranged inside the cylinder, and the sleeve 50 includes two layers of cylinders, which are connected by buckles 6. The bottom of the cylinder of the lowermost layer is provided with a filter cover 52 opposite to the outlet, and the air outlet is provided with a mounting portion 7. This design can enhance the filtering effect of the air filter device.

[0054] The specific implementation process is as follows: When working, the air filter device is installed on the terminal through the mounting portion 7. When the terminal is in use, under the action of the terminal, air enters the interior from the air inlet hood 2, and then enters along the upper air duct 8 and flows into the lower air duct 31. Under the action of the spiral guide portion 81, impurities are separated and fall into the dust box 4 below. The air flows from bottom to top into the upper air duct 8 and is discharged, and then enters the exhaust duct 10, flows downward along the exhaust duct 10 and enters the air guide duct 53, and flows out from the bottom of the air guide duct 53. Then it flows upward in the sleeve 50, passes through the filter element 51, and finally flows out from the mounting portion 7. The flow of air in the filter assembly is shown in the figure. Figure 8 shown.

[0055] Example 2

[0056] like Fig.14 and Fig.15 As shown, the difference from the embodiment is that, in this embodiment, a fan 9 is provided between the upper cover 1 and the top surface of the air inlet cover 2, and the fan 9 is arranged opposite to the air inlet of the exhaust pipe 10.

[0057] Example 3

[0058] The difference from Embodiment 1 and Embodiment 2 is that, in this embodiment, the dust collecting box 4 includes two dust collecting parts and two supporting feet 42. The two dust collecting parts and the two supporting feet 42 are symmetrically arranged, and the dust collecting parts and the supporting feet 42 are arranged at intervals. This design can enhance the stable supporting effect of the dust collecting box on the air filter device, and facilitate the mold opening cost of the dust collecting box, which can reduce the production cost of the air filter device.

[0059] The above is only an embodiment of the utility model. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the utility model before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for the technicians in this field, without departing from the structure of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, which will not affect the effect of the implementation of the utility model and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to explain the content of the claims.

Claims

1. An air filter device, comprising a dust box, an exhaust pipe, a filter structure and an upper cover; the filter structure comprises a filter assembly and an air inlet cover; the filter assembly comprises a mounting platform and an upper air pipe, and a plurality of lower air pipes are arranged on the mounting platform; characterized in that: The upper air duct is integrally formed with a spiral guide portion on the outer circumference, and the upper air duct is inserted into and fixed in the lower air duct; an insert groove is axially provided on the upper portion of the outer circumference of the lower air duct, and an axially extending insert portion is provided on the upper portion of the spiral guide portion, and the top end of the insert groove is flush with the top end of the insert portion and is set lower than the length of the upper air duct.

2. The air filter device according to claim 1, characterized in that: A supporting portion capable of pressing the plugging portion against the side of the plugging slot is provided at the bottom of the plugging slot.

3. The air filter device according to claim 1 or 2, characterized in that: The upper air duct is located at the upper part of the lower air duct, and the lower part of the lower air duct is convergent inwardly.

4. The air filter device according to claim 3, characterized in that: The top surface of the air inlet cover is provided with a mounting hole matching the upper air duct.

5. The air filter device according to claim 4, characterized in that: The side wall of the air inlet cover is provided with a grille, and the bars of the grille are arranged to be inclined upward from the outside to the inside.

6. The air filter device according to claim 5, characterized in that: The dust collecting box is provided with a plurality of dust collecting parts, and the dust collecting parts are provided with dust discharge ports inclined downward.

7. The air filter device according to claim 6, characterized in that: The dust exhaust port is provided with a detachable cover.

8. The air filter device according to claim 7, characterized in that: It also includes a filter sleeve assembly, the air inlet of the filter sleeve assembly is connected to the air outlet of the exhaust pipe, the side wall of the filter sleeve assembly is provided with an air outlet, and the air duct between the air inlet and the air outlet is provided with multiple layers of filters.

9. The air filter device according to claim 8, characterized in that: The filter sleeve assembly includes an air duct and a sleeve disposed on the air duct, the air inlet is located at the upper portion of the air duct, an outlet is provided at the lower portion of the air duct, the filter element is disposed inside the sleeve, and the filter element is provided with a through hole for the air duct to pass through.

10. The air filter device according to claim 9, characterized in that: The sleeve comprises a plurality of removable and spliced ​​cylinders, and the air outlet is arranged on the side wall of the uppermost cylinder.

11. The air filter device according to claim 10, characterized in that: The bottom of the lowest cylinder is provided with a filter cover opposite to the outlet.

12. The air filter device according to claim 11, characterized in that: The air outlet is provided with a mounting portion.

13. The air filter device according to claim 12, characterized in that: A fan is arranged between the upper cover and the top surface of the air inlet cover, and the fan is arranged opposite to the air inlet of the exhaust pipe.

14. The air filter device according to claim 13, characterized in that: The dust collecting box is provided with supporting feet.

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