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, the rear end and the front end of the filter material are connected with the first fixing part and the second fixing part respectively, and the outer diameter of the rear end of the filter material is smaller than the diameter of the front end of the filter material; the inner wall of the through hole is further provided with a grabbing plate extending in the axis direction of the through hole. According to the utility model, the filtering efficiency is improved, and the filter element is convenient to disassemble.

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 car vacuum cleaner requires a filter element to filter the dust. Since the size of the car vacuum cleaner is relatively small, the filtering area of ​​the filter element is not very large. For example, the patent application number is 202020981211.9, and the patent name is “Filtering device for car vacuum cleaner”. It has a cylindrical structure and a relatively small filtering area. With a small filtering area, it is easy to be clogged by a little adsorption. During a vacuuming process, it is necessary to stop the machine for cleaning multiple times, which will also affect the adsorption force of the vacuum cleaner. At the same time, after it is installed in the vacuum cleaner, it is not convenient to disassemble it. Therefore, how to solve the above technical problems is the direction that those skilled in the art need to work hard on. 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 and is convenient for taking out, placing and cleaning the filter element.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a filter element, comprising a coaxially arranged filter material, a first fixing part and a second fixing part, the second fixing part is an annular structure, and a through hole is provided in the middle of the second fixing part, the inner diameter of the through hole is larger than the outer diameter of the first fixing part; the middle part of the filter material is provided with a cavity connected with the front and rear ends, the through hole is connected to the cavity, the rear end and the front end of the filter material are respectively connected to the first fixing part and the second fixing part, and the outer diameter of the rear end of the filter material is smaller than the diameter of the front end of the filter material; the inner wall of the through hole is also provided with a grab plate extending toward the axis direction of the through hole.

[0006] In the above technical solution, both ends of the filter material are bonded to the first fixing portion and the second fixing portion respectively.

[0007] In the above technical solution, a first columnar groove is coaxially provided at the front end of the first fixing portion, 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.

[0008] 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.

[0009] In the above technical solution, the grab plate is an arc-shaped structure, and the distance between the inner end surface of the grab plate and the through hole is smaller than the radius of the through hole.

[0010] In the above technical solution, the grab plate is arranged close to the rear end of the through hole.

[0011] 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;

[0012] 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.

[0013] In the above technical solution, a second annular groove is coaxially provided on the front end surface of the second fixing portion.

[0014] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0015] 1. In the present invention, the filter material is configured as a conical structure, with both ends connected to the first fixing portion and the second fixing portion, respectively. The conical filter material has a larger filtration area and a better filtration effect.

[0016] 2. The present invention also provides a gripping plate. After the filter element is installed in the vacuum cleaner, it can be clamped in the vacuum cleaner through the second fixing portion. The filter element can be grabbed and removed by the gripping plate, which improves the convenience of disassembly.

[0017] 3. In the utility model, inner and outer strip grooves are respectively provided on the inner and outer surfaces of the filter material, which can effectively increase the filtration area and also increase the strength of the filter material to prevent deformation during the filtration process;

[0018] 4. 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

[0019] Figure 1 This is a schematic structural diagram of the first embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of another viewing angle in the first embodiment of the present utility model;

[0021] Figure 3 This is a schematic cross-sectional view of the first embodiment of the present invention;

[0022] Figure 4 This is a schematic structural diagram of the cross section of the filter material end portion in the first embodiment of the present invention;

[0023] Figure 5 This is a structural diagram of the filter element in the first embodiment of the present invention in use state.

[0024] Wherein: 1. filter material; 2. first fixing portion; 3. second fixing portion; 4. through hole; 5. cavity; 6. gripping plate; 7. dust hopper; 8. first cylindrical groove; 9. annular protrusion; 10. annular groove; 11. outer strip groove; 12. inner strip groove; 13. second annular groove; DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0026] Example 1: See Figure 1-5 As shown, a filter element includes a coaxially arranged filter material 1, a first fixing part 2 and a second fixing part 3, the second fixing part 3 is an annular structure, a through hole 4 is provided in the middle of the second fixing part 3, the inner diameter of the through hole 4 is larger than the outer diameter of the first fixing part 2; the middle of the filter material 1 is provided with a cavity 5 connected with the front and rear ends, the through hole 4 is connected to the cavity, the rear end and the front end of the filter material 1 are respectively connected to the first fixing part 2 and the second fixing part 3, and the outer diameter of the rear end of the filter material 1 is smaller than the diameter of the front end of the filter material 1; the inner wall of the through hole 4 is also provided with a grab plate 6 extending toward the axial direction of the through hole 4.

[0027] In this embodiment, the filter element is used in a vehicle-mounted handheld vacuum cleaner. It is installed on the suction port side (intake port) of the vacuum cleaner fan and is located in a dust hopper 7. During installation, the outer surface of the second fixed portion contacts the inner wall of the dust hopper, the second fixed portion faces the vacuum cleaner fan, and the first fixed portion faces the dust hopper's suction port. When the vacuum cleaner is operating, the fan draws air into the dust hopper to generate negative pressure, which 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 adsorbed between the filter element and the dust suction port at the dust hopper. The debris is then filtered out by the filter element and prevented from entering the fan through the filter material and through the through-holes. In this embodiment, the outer diameter of the first fixed portion is smaller than the outer diameter of the second fixed portion. Therefore, the airflow can smoothly flow from the outside of the first fixed portion through the filter material and the dust hopper, and after passing through the filter material, it is sucked away by the fan through the cavity and through-holes. Since 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 the circle. Therefore, the filtration efficiency is better, which can reduce the frequency of cleaning during the vacuuming process.

[0028] At the same time, since the outer surface of the second fixing part needs to contact the inner wall of the dust hopper, it is particularly inconvenient to remove the filter element from the dust hopper for cleaning (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 part lacks a fulcrum, resulting in inconvenient disassembly). Therefore, a grab plate is provided on the inner wall of the through hole. When disassembling, the user only needs to insert one finger into the through hole, and by sensing and hooking the grab plate, the filter element can be taken out of the dust hopper, realizing quick and convenient removal of the filter element. Of course, other tools can also be used to insert the finger into the through hole and hook the grab plate to remove the filter element.

[0029] In the present invention, both ends of the filter material are bonded and connected to the first fixing portion and the second fixing portion respectively.

[0030] In the present invention, the hardness of the filter material is relatively large, the first positioning part and the second positioning part are made of plastic, and the filter material is made of a material with relatively high strength, such as hard filter paper or hard non-woven fabric, so that the filter material can support the first positioning part and the second positioning part, and can also resist the suction force of the fan, preventing the filter material from being deformed and causing the first positioning part to be close to the second positioning plate part.

[0031] See also Figure 3 As shown, the front end of the first fixing portion 2 is coaxially provided with a first columnar groove 8, the rear end of the filter material 1 is connected to the rear end surface of the first columnar groove 8, and the rear end outer surface of the filter material 1 is connected to the inner wall of the first columnar groove 8.

[0032] In this embodiment, the provision of the first cylindrical groove increases the contact area between the filter material and the first fixing portion. Furthermore, when assembling the filter material and the first fixing portion, it also facilitates quick positioning, making assembly more convenient. Simply applying glue to the first cylindrical groove, or applying glue to the end of the filter material, and then quickly inserting the filter material into the first cylindrical groove allows for rapid bonding and fixation. This increases the contact area between the filter material and the first fixing portion, resulting in greater strength.

[0033] See also Figure 1-3 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.

[0034] 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.

[0035] See also Figure 2 As shown, the grab plate is an arc-shaped structure, and the distance between the inner end surface of the grab plate and the through hole is smaller than the radius of the through hole.

[0036] The grab plate is arranged close to the rear end of the through hole.

[0037] The arc-shaped structure is adopted, so when the operator inserts his fingers into the through hole to hook the filter element outward from the dust hopper, the arc-shaped structure will not scratch his fingers, which is safer.

[0038] See also Figure 1 、 2 As shown in FIG. 4 , a plurality of outer strip grooves 11 are arranged on the outer surface of the filter material 1, 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;

[0039] The inner surface of the filter material 1 is circumferentially arranged 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 11 .

[0040] In this embodiment, the raw material of the filter material is a sheet material, which is folded in advance into a wavy shape, and then the folded sheet material is cut into a fan-shaped structure, and then the two ends of the fan-shaped structure are bonded to form a molded filter material, and the gaps between the waves constitute the inner strip grooves and the outer strip grooves. In this structure, the filter material with a conical structure has a stronger ability to resist deformation in the axial direction.

[0041] Moreover, it is folded into a wave shape, and the outer strip grooves are formed on the outside of the conical structure filter material, and the inner strip grooves are formed on the inside. The filtering surface area is larger and the filtering efficiency is better, thereby reducing the frequency of cleaning.

[0042] See also Figure 2 、 3 As shown, a second annular groove 13 is coaxially provided on the front end surface of the second fixing portion 3. In this way, while ensuring the strength of the second fixing portion, the material used is reduced as much as possible, making the second fixing portion thinner.

Claims

1. A filter element, characterized in that: It includes a coaxially arranged filter material, a first fixing part and a second fixing part, the second fixing part is an annular structure, a through hole is provided in the middle of the second fixing part, the inner diameter of the through hole is larger than the outer diameter of the first fixing part; the middle of the filter material is provided with a cavity connected with the front and rear ends, the through hole is connected to the cavity, the rear end and the front end of the filter material are respectively connected to the first fixing part and the second fixing part, and the outer diameter of the rear end of the filter material is smaller than the diameter of the front end of the filter material; the inner wall of the through hole is also provided with a grab plate extending toward the axis direction of the through hole.

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 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: The grab plate is an arc-shaped structure, and the distance between the inner end surface of the grab plate and the through hole is smaller than the radius of the through hole.

6. The filter element according to claim 1, characterized in that: The grab plate is arranged close to the rear end of the through hole.

7. 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.

8. The filter element according to claim 1, characterized in that: A second annular groove is coaxially provided on the front end surface of the second fixing portion.

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