Filter element

Abstract

The utility model discloses a filter element which is characterized in that the filter element comprises a filter material, a first fixing part and a second fixing part which are coaxially arranged, the second fixing part is of an annular structure, a through hole is formed in the middle of the second fixing part, and the inner diameter of the through hole is larger than the outer diameter of the first fixing part; a cavity with the front end and the rear end communicated is formed in the middle of the filter material, the through hole is communicated with the cavity, and the rear end and the front end of the filter material are connected with the first fixing part and the second fixing part respectively; the filter material is made of non-woven fabric or filter paper; a supporting part is further arranged, the middle of the supporting part is inserted into the cavity, one end of the supporting part abuts against the first fixing part, and the other end of the supporting part is connected with the second fixing part. According to the utility model, the filtering efficiency of the filter element is improved, and the strength of the filter element is ensured.

Description

Technical Field

[0001] The utility model relates to the field of filtration, in particular to a filter element. Background Art

[0002] With the increasing popularity of cars, more and more attention is being paid to the sanitation inside cars. However, due to the special structure of the car, there are all kinds of dust, debris, fruit shells and other small debris in the gaps between the seats, on the car floor mats and other corners. It is very troublesome to clean them up by yourself, and it is difficult to clean them thoroughly. Usually, people go to the car wash regularly to wash the outside of the car and use a large vacuum cleaner to clean the inside. Going to the car wash to clean the dust inside the car is expensive and troublesome. Usually, you have to wait in line, and if you only need to clean the dust inside the car, there is no need to go to the car wash at all. The current large vacuum cleaners are also inconvenient to carry and use in the car. Therefore, a car-mounted vacuum cleaner is designed, which is compact and can provide a certain amount of suction for cleaning.

[0003] In the prior art, a vehicle-mounted vacuum cleaner requires a filter element to filter dust. Since the size of the vehicle-mounted vacuum cleaner is relatively small, the filtering area of ​​the filter element is not very large. For example, the application number is: 202020981211.9, and the patent name is "Filtering device for vehicle-mounted vacuum cleaner". It has a cylindrical structure and a relatively small filtering area. A small filtering area can easily cause clogging with a slight adsorption. During a vacuuming process, the machine needs to be stopped for cleaning multiple times, which will also affect the adsorption force of the vacuum cleaner. Summary of the Invention

[0004] The utility model aims to provide a filter element, which can effectively increase the filtering area by using the structure, while also ensuring the strength of the filter element and extending its service life.

[0005] To achieve the above-mentioned object, the technical solution adopted by the present invention is as follows: a filter element, comprising a coaxially arranged filter material, a first fixing portion, and a second fixing portion, wherein the second fixing portion is an annular structure, a through hole is provided in the middle of the second fixing portion, and the inner diameter of the through hole is larger than the outer diameter of the first fixing portion; a cavity is provided in the middle of the filter material with front and rear ends connected, the through hole is connected to the cavity, the rear end and the front end of the filter material are connected to the first fixing portion and the second fixing portion respectively, and the front end of the filter material is arranged outside the through hole;

[0006] The filter material is made of non-woven fabric or filter paper;

[0007] A supporting portion is also provided, the middle portion of which is inserted into the cavity, one end of which is against the first fixing portion, and the other end of which is connected to the second fixing portion.

[0008] In the above technical solution, both ends of the filter material are bonded to the first fixing portion and the second fixing portion respectively.

[0009] In the above technical solution, the rear end diameter of the filter material is smaller than the front end diameter of the filter material;

[0010] The front end of the first fixing portion is coaxially provided with a first columnar groove, the rear end of the filter material is connected to the rear end surface of the first columnar groove, and the rear end outer surface of the filter material is connected to the inner wall of the first columnar groove.

[0011] In the above technical solution, an annular protrusion is coaxially provided on the rear end face of the second fixed part, the inner surface of the annular protrusion is flush with the inner wall of the through hole, and an annular groove is provided on the rear end face of the annular protrusion. The front end of the filter material is inserted into the annular groove, the front end face of the filter material is connected to the front end face of the annular groove, and the inner surface and outer surface of the front end of the filter material are respectively connected to the inner walls on both sides of the annular groove.

[0012] In the above technical solution, a plurality of outer strip grooves are arranged on the outer surface of the filter material, and the two ends of the outer strip grooves are respectively connected to the front end surface and the rear end surface of the filter material;

[0013] A plurality of inner strip grooves are arranged on the inner surface of the filter material. Both ends of the inner strip grooves are respectively connected with the front end surface and the rear end surface of the filter material, and each inner strip groove is arranged between adjacent outer strip grooves.

[0014] In the above technical solution, the support part is a T-shaped structure, and the support part includes a first rod and a second rod perpendicular to each other, the front end of the first rod is vertically connected to the middle part of the second rod, the middle part of the first rod is coaxially inserted in the cavity, the rear end face of the first rod is against the front end face of the first fixing part, and the second rod is connected to the second fixing part.

[0015] In the above technical solution, two clamping grooves communicating with the through hole are symmetrically provided on the front end surface of the second fixing portion, and the two ends of the second rod are respectively inserted into the clamping grooves.

[0016] In the above technical solution, the card slot includes a first slot and a second slot that are connected to each other, the inner ends of the first slot and the second slot are connected to the through hole, the front end of the first slot is connected to the front end surface of the second fixing portion, the first end of the second slot is connected to the rear end of the first slot, and the second end of the second slot is arranged away from the first slot;

[0017] The end portion of the second rod is inserted into the second end of the second slot.

[0018] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0019] 1. The filter material of this utility model adopts a cone-shaped structure, and uses the outer surface of the filter material for dust collection and filtration, which can effectively increase the filtration area, improve the filtration effect, and reduce the cleaning frequency. The setting of the support part can also prevent the filter material from deforming and affecting the filtration effect;

[0020] 2. The support part of the utility model adopts a T-shaped structure, which is simple and easy to assemble;

[0021] 3. The filter element in the utility model is set to a conical structure with a small back and a large front, which can be directly installed into the columnar air inlet of the vacuum cleaner, which not only increases the filtering area but also ensures normal air duct unobstructed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of the first embodiment of the present invention;

[0023] Figure 2 This is a structural diagram of another perspective in the first embodiment of the present utility model;

[0024] Figure 3 yes Figure 2 A partial enlarged view of the connection between the middle support portion and the second fixing portion;

[0025] Figure 4 This is a schematic cross-sectional view of the first embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the end surface structure of the filter material in Example 1 of the present utility model;

[0027] Figure 6 This is a structural diagram of the filter element in the first embodiment of the present invention in use state.

[0028] Wherein: 1. filter material; 2. first fixing portion; 3. second fixing portion; 4. through hole; 5. cavity;

[0029] 6. Support part; 7. Dust hopper; 8. First columnar groove; 9. Annular protrusion; 10. Annular groove; 11. Outer strip groove; 12. Inner strip groove; 13. First rod; 14. Second rod; 15. Slot; 16. First groove; 17. Second groove. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0031] Example 1: See Figure 1-6As shown, a filter element includes a coaxially arranged filter material 1, a first fixing portion 2, and a second fixing portion 3, wherein the second fixing portion 3 is an annular structure, a through hole 4 is provided in the middle of the second fixing portion 3, and the inner diameter of the through hole 4 is larger than the outer diameter of the first fixing portion 2; a cavity 5 is provided in the middle of the filter material 1 with front and rear ends connected, the through hole 4 is connected to the cavity 5, and the rear end and front end of the filter material 1 are respectively connected to the first fixing portion 2 and the second fixing portion 3;

[0032] The filter material 1 is made of non-woven fabric or filter paper;

[0033] A supporting portion 6 is further provided, the middle portion of which is inserted into the cavity, one end of which is against the first fixing portion 2 , and the other end of which is connected to the second fixing portion 3 .

[0034] In this embodiment, the filter element is used in a vehicle-mounted handheld vacuum cleaner. It is installed on the suction side (intake port) of the vacuum cleaner's blower and within a dust hopper 7. During installation, the outer surface of the second fixing portion contacts the inner wall of the dust hopper, the second fixing portion faces the vacuum cleaner's blower, and the first fixing portion corresponds to the dust hopper's suction port. When the vacuum cleaner is operating, the blower draws air into the dust hopper, generating negative pressure. This pressure passes through the through-holes and filter material and acts on the dust hopper's suction port, causing the dust and other debris to be attracted between the filter element and the dust port. The debris is then filtered out by the filter element, preventing it from entering the blower through the filter material and through-holes. In this embodiment, the outer diameter of the first fixing portion is smaller than the outer diameter of the second fixing portion (the inner diameter of the through hole is larger than the outer diameter of the first fixing portion, and therefore, the outer diameter of the second fixing portion is larger than the outer diameter of the first fixing portion). Therefore, the airflow can smoothly flow from the outside of the first fixing portion through the filter material and the dust hopper, and after passing through the filter material, it passes through the cavity and through the through hole and is sucked away by the fan. Because the outer diameter of the rear end of the filter material is smaller than the outer diameter of the front end, it is equivalent to a conical structure, and its outer surface area is larger than that of a circular structure. Therefore, the filtration efficiency is better, which can reduce the frequency of cleaning during the dust collection process.

[0035] Furthermore, the filter material is made of non-woven fabric or filter paper, preferably non-woven fabric, which has a certain strength. However, after a period of use, the filter material may deform, causing the first fixing portion to approach the second fixing portion, thereby reducing the filter area of ​​the filter material, or even completely blocking the through hole, making it impossible to filter normally. Therefore, by providing a support portion, it is inserted into the cavity, one end of which is against the first fixing portion, and the other end is connected to the second fixing portion to maintain the distance between the first fixing portion and the second fixing portion, and the two ends of the filter material are respectively connected to the first fixing portion and the second fixing portion, so that the filter material can be tensioned by maintaining the first fixing portion and the second fixing portion at a fixed distance, preventing its deformation, ensuring the filtering effect, and extending the service life.

[0036] Wherein, both ends of the filter material are bonded to the first fixing portion and the second fixing portion respectively.

[0037] The rear end diameter of the filter material is smaller than the front end diameter of the filter material;

[0038] A first cylindrical groove 8 is coaxially provided at the front end of the first fixing portion 2 , the rear end of the filter material 1 is connected to the rear end surface of the first cylindrical groove 8 , and the rear end outer surface of the filter material 1 is connected to the inner wall of the first cylindrical groove 8 .

[0039] The provision of the first cylindrical groove increases the contact area between the filter material and the first fixing portion. It also facilitates quick positioning when assembling the filter material and the first fixing portion, making assembly more convenient. Simply apply glue to the first cylindrical groove, or apply glue to the end of the filter material, and then quickly insert the filter material into the first cylindrical groove to achieve rapid bonding and fixation. This increases the contact area between the filter material and the first fixing portion, resulting in greater strength.

[0040] See also Figure 1 、 4 As shown, an annular protrusion 9 is coaxially provided on the rear end face of the second fixing portion 3, and the inner surface of the annular protrusion 9 is flush with the inner wall of the through hole 4. An annular groove 10 is provided on the rear end face of the annular protrusion 9, and the front end of the filter material 1 is inserted into the annular groove 10. The front end face of the filter material 1 is connected to the front end face of the annular groove 10, and the inner surface and outer surface of the front end of the filter material 1 are respectively connected to the inner walls on both sides of the annular groove 10.

[0041] In this embodiment, since the second fixing portion needs to contact the inner wall of the dust hopper, an annular protrusion is provided to prevent deformation. This increases the strength of the second fixing portion. Furthermore, the provision of the annular groove facilitates the connection, positioning, and rapid installation of the filter material and the second fixing portion. During installation, the filter material and the second fixing portion can be quickly secured by applying glue to the annular groove or by directly inserting the end of the filter material into the annular groove after applying glue. Furthermore, the contact area between the filter material and the second fixing portion is increased, thereby enhancing the connection strength between the two.

[0042] The outer surface of the filter material 1 is provided with a plurality of outer strip grooves 11, and the two ends of the outer strip grooves 11 are respectively connected to the front end surface and the rear end surface of the filter material 1;

[0043] The inner surface of the filter material 1 is provided with a plurality of inner strip grooves 12 , the two ends of the inner strip grooves 12 are respectively connected to the front end surface and the rear end surface of the filter material 1 , and each inner strip groove 12 is arranged between adjacent outer strip grooves 12 .

[0044] In this embodiment, the filter material is made of sheet material, which is pre-folded into a wavy shape. The folded sheet is then cut into fan-shaped structures. The two ends of the fan-shaped structures are then bonded together to form a shaped filter material. The gaps between the waves form the inner and outer strip grooves. In this structure, the conical filter material has a stronger resistance to axial deformation. Furthermore, the folded wave shape, with the outer strip grooves on the outside of the conical filter material forming the outer strip grooves and the inner strip grooves on the inside, increases the filtering surface area and improves the filtration efficiency, thereby reducing the frequency of cleaning.

[0045] See also Figure 2-4 As shown, the support portion 6 is a T-shaped structure, and the support portion includes a first rod 13 and a second rod 14 that are perpendicular to each other. The front end of the first rod 13 is vertically connected to the middle part of the second rod 14. The middle part of the first rod 13 is coaxially inserted into the cavity 5. The rear end face of the first rod 13 is against the front end face of the first fixing portion 2, and the second rod 14 is connected to the second fixing portion 3.

[0046] Two slots 15 communicating with the through hole 4 are symmetrically provided on the front end surface of the second fixing portion 3 , and both ends of the second rod 14 are respectively inserted into the slots 15 .

[0047] In this embodiment, after the filter material and the first fixing part and the second fixing part are assembled, in order to facilitate the rapid assembly of the support part, the support part is set to a T-shaped structure, that is, the support part is set to a T-shaped rod, and the first rod is directly inserted into the cavity from the through hole, and the second rod is opposite the slot. After the second rod and the slot are clamped, the end of the first rod is against the first fixing part. Preferably, the rear end of the first rod is against the end face of the first columnar groove, so that the support part can be quickly fixed. At this time, the support part can be used to press the first fixing part and the second fixing part against each other to achieve reinforcement of the filter element, thereby ensuring stability and strength during subsequent use and extending the service life.

[0048] See also Figure 3 As shown, the card slot 15 includes a first slot 16 and a second slot 17 that are connected to each other. The inner ends of the first slot 16 and the second slot 17 are connected to the through hole 4. The front end of the first slot 16 is connected to the front end surface of the second fixing portion 3. The first end of the second slot 17 is connected to the rear end of the first slot 16, and the second end of the second slot 17 is arranged away from the first slot 16.

[0049] An end portion of the second rod 14 is inserted into the second end of the second slot 17 .

[0050] When assembling the support part, the first rod is inserted into the cavity through the through hole, the second rod is opposite the first groove, and then the support part is continued to move backward until the end of the second rod is against the second groove. At this time, the end of the first rod is against the first fixing part, and then the support part is rotated so that the second rod rotates away from the first groove, thereby achieving rapid fixation of the support part.

[0051] More preferably, since the outer surface of the second fixing portion needs to contact the inner wall of the dust hopper, when the filter element needs to be removed from the dust hopper for cleaning, it is particularly inconvenient to remove it (mainly because the size of the vehicle-mounted handheld vacuum cleaner is relatively small, and the dust hopper is also relatively small, basically only 1-2 fingers can be inserted, and the second fixing portion lacks a fulcrum, resulting in inconvenient disassembly). Therefore, the presence of the second rod allows the user to hook or grab the second rod with their fingers to remove the filter element from the dust hopper, thereby achieving quick and convenient disassembly of the filter element. Of course, the filter element can also be removed by hooking the second rod with other tools. In this way, the support portion not only plays a supporting and reinforcing role, but also serves to facilitate the disassembly of the filter element.

Claims

1. A filter element, characterized in that: The filter comprises a coaxially arranged filter material, a first fixing portion, and a second fixing portion, wherein the second fixing portion is an annular structure, a through hole is provided in the middle of the second fixing portion, and the inner diameter of the through hole is larger than the outer diameter of the first fixing portion; a cavity is provided in the middle of the filter material with front and rear ends connected, the through hole is connected to the cavity, and the rear end and front end of the filter material are connected to the first fixing portion and the second fixing portion respectively; The filter material is made of non-woven fabric or filter paper; A supporting portion is also provided, the middle portion of which is inserted into the cavity, one end of which is against the first fixing portion, and the other end of which is connected to the second fixing portion.

2. The filter element according to claim 1, characterized in that: Two ends of the filter material are bonded and connected to the first fixing portion and the second fixing portion respectively.

3. The filter element according to claim 1, characterized in that: The rear end diameter of the filter material is smaller than the front end diameter of the filter material; The front end of the first fixing portion is coaxially provided with a first columnar groove, the rear end of the filter material is connected to the rear end surface of the first columnar groove, and the rear end outer surface of the filter material is connected to the inner wall of the first columnar groove.

4. The filter element according to claim 1, characterized in that: An annular protrusion is coaxially provided on the rear end face of the second fixing portion, and the inner surface of the annular protrusion is flush with the inner wall of the through hole. An annular groove is provided on the rear end face of the annular protrusion, and the front end of the filter material is inserted into the annular groove. The front end face of the filter material is connected to the front end face of the annular groove, and the inner surface and outer surface of the front end of the filter material are respectively connected to the inner walls on both sides of the annular groove.

5. The filter element according to claim 1, characterized in that: A plurality of outer strip grooves are arranged on the outer surface of the filter material, and the two ends of the outer strip grooves are respectively connected to the front end surface and the rear end surface of the filter material; A plurality of inner strip grooves are arranged on the inner surface of the filter material. Both ends of the inner strip grooves are respectively connected with the front end surface and the rear end surface of the filter material, and each inner strip groove is arranged between adjacent outer strip grooves.

6. The filter element according to claim 1, characterized in that: The support portion is a T-shaped structure, and includes a first rod and a second rod perpendicular to each other. The front end of the first rod is vertically connected to the middle part of the second rod. The middle part of the first rod is coaxially inserted into the cavity. The rear end surface of the first rod is against the front end surface of the first fixing portion, and the second rod is connected to the second fixing portion.

7. The filter element according to claim 6, characterized in that: Two clamping grooves communicating with the through hole are symmetrically provided on the front end surface of the second fixing portion, and the two ends of the second rod are respectively inserted into the clamping grooves.

8. The filter element according to claim 7, characterized in that: The card slot includes a first slot and a second slot that are connected to each other, wherein the inner ends of the first slot and the second slot are connected to the through hole, the front end of the first slot is connected to the front end surface of the second fixing portion, the first end of the second slot is connected to the rear end of the first slot, and the second end of the second slot is disposed away from the first slot; The end portion of the second rod is inserted into the second end of the second slot.

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