HEPA (High Efficiency Particulate Air) filtering structure and filter

Abstract

The utility model discloses an HEPA filtering structure and filter, wherein the HEPA filtering structure comprises a base, an upper shell and at least one first filtering unit, the base is provided with a filtering groove, the upper shell covers the base, the first filtering unit is arranged in the filtering groove, and the first filtering unit is arranged in the filtering groove. At least one second through hole is formed in the bottom wall of the filter tank, at least one third through hole is formed in the upper shell, one end of the first filter unit is communicated with the second through hole, and the other end of the first filter unit is communicated with the third through hole. During cleaning, the cleaning fluid passes through the second through holes and then intensively acts on the first through holes, so that garbage attached to the inner wall of the first filtering unit falls off and is taken away by the cleaning fluid, and a better self-cleaning effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a HEPA filtering structure and a filter. Background Art

[0002] The working principle of a vacuum cleaner is to use an electric motor to drive the blades to rotate at high speed, generating negative air pressure in a sealed shell to absorb dusty surfaces such as carpets, floors, walls, etc. The dust is sucked into the dust-gas separation component along with the air, where it is filtered by the HEPA in the dust-gas separation component and collected by the dust collecting bucket. The clean air after filtration is then discharged from the vacuum cleaner body.

[0003] During the dirt removal process of the vacuum cleaner, no matter it is dust-type filtration or cyclone filtration, dust will adhere to the surface of the air inlet side of the filter HEPA. The longer it is used, the more dust will accumulate on the surface of the filter HEPA, which will gradually weaken the air permeability of the filter HEPA, causing the wind force to drop, thereby reducing the dust removal performance of the vacuum cleaner.

[0004] In the prior art, some vacuum cleaners are capable of self-cleaning. After using the vacuum cleaner, it is placed on a base to clean the filter hepa, so that dust falls off and enters the dust cup on the base. However, the existing filter hepa is a large whole. When the vacuum cleaner is vacuuming, a large amount of dust gathers on the outer wall of the filter hepa. The self-cleaning mode makes it difficult for the dust on the filter hepa to fall off and enter the dust cup on the base, which leads to poor cleaning effect of the vacuum cleaner's self-cleaning mode. Utility Model Content

[0005] The purpose of the utility model is to provide a HEPA filter structure and filter to solve the technical problem that the HEPA filter of the prior art is a large whole, a large amount of dust is gathered on the outer wall of the HEPA filter when the vacuum cleaner is vacuuming, resulting in poor cleaning effect of the self-cleaning mode of the vacuum cleaner.

[0006] The utility model provides a HEPA filter structure, including a base, an upper shell and at least one first filter unit, the base is provided with a filter groove, the upper shell cover is arranged on the base, the first filter unit is arranged in the filter groove, the bottom wall of the filter groove is provided with at least one second through hole, the upper shell is provided with at least one third through hole, one end of the first filter unit is connected with the second through hole, and the other end is connected with the third through hole.

[0007] As described above in the HEPA filter structure, the first filter unit is provided with a first through hole, the first through hole is respectively connected to the second through hole and the third through hole, the inner wall surface of the first filter unit is used for air intake, and the outer wall surface of the first filter unit is used for air outlet.

[0008] As described above, in the HEPA filter structure, at least one first mounting column extending upward is provided on the bottom wall of the filter tank, the second through hole is provided on the first mounting column, and the second through hole passes through the bottom wall of the base, at least one second mounting column extending downward is provided on the bottom wall of the upper shell body, the third through hole is provided on the second mounting column, and the second mounting column passes through the top wall of the upper shell body, and one end of the first filter unit is sleeved on one of the first mounting columns, and the other end is sleeved on one of the second mounting columns.

[0009] In the HEPA filter structure as described above, the first filter unit is a straight-cylinder structure.

[0010] As described above in the HEPA filter structure, when there are multiple first filter units, the multiple first filter units are distributed in the filter tank in a ring shape.

[0011] In the HEPA filter structure as described above, the upper shell is sealed and connected to the base to form a cavity, and the first filter unit is disposed in the cavity.

[0012] In the HEPA filter structure as described above, the upper shell is provided with an exhaust hole, and the exhaust hole is communicated with the cavity.

[0013] In the HEPA filter structure as described above, two ends of the first filter unit are sealed and connected to the upper shell and the base respectively.

[0014] In the HEPA filter structure as described above, the first filter unit is formed by enclosing filter paper, and the cross-section of the first through hole is circular or elliptical.

[0015] The utility model also provides a filter for a vacuum cleaner, comprising a filter housing and the HEPA filter structure as described above, wherein an installation cavity is provided inside the filter housing, the HEPA filter structure is installed in the installation cavity, and the side wall of the installation cavity is a breathable structure.

[0016] Implementing the embodiments of the present utility model will have the following beneficial effects:

[0017] In the utility model, a filter tank is provided on the base, an upper shell cover is provided on the base, the first filter unit is provided in the filter tank, the bottom wall of the filter tank is provided with at least one second through hole, the upper shell is provided with at least one third through hole, one end of the first filter unit is connected with the second through hole, and the other end is connected with the third through hole. When cleaning, the cleaning fluid passes through the second through hole and acts on the first filter unit in a concentrated manner, so that the garbage attached to the first filter unit falls off, and a better self-cleaning effect is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 is a structural schematic diagram of a HEPA filter structure according to an exemplary embodiment;

[0020] Figure 2 is an exploded view of a HEPA filter structure according to an exemplary embodiment;

[0021] Figure 3 is a cross-sectional view of a HEPA filter structure according to an exemplary embodiment;

[0022] Figure 4 is a schematic structural diagram of a filter according to an exemplary embodiment;

[0023] Figure 5 is a cross-sectional view of a filter according to an exemplary embodiment;

[0024] Figure 6 is an exploded view of a filter according to an exemplary embodiment.

[0025] Among them: 1. base; 11. filter tank; 12. second through hole; 13. first mounting column; 2. upper shell; 21. third through hole; 22. second mounting column; 23. exhaust hole; 3. first filter unit; 31. first through hole; 4. second filter unit; 41. fourth through hole; 5. filter shell; 51. mounting cavity. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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 or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0031] It should be noted that "HEPA" stands for "High efficiency particulate air Filter", and its full Chinese name is high-efficiency air filter.

[0032] See also Figure 1-Figure 3The utility model provides a HEPA filter structure, including a base 1, an upper shell 2 and at least one first filter unit 3. The base 1 is provided with a filter slot 11, the upper shell 2 is covered on the base 1, the first filter unit 3 is arranged in the filter slot 11, the bottom wall of the filter slot 11 is provided with at least one second through hole 12, the upper shell 2 is provided with at least one third through hole 21, one end of the first filter unit 3 is connected with the second through hole 12, and the other end is connected with the third through hole 21. During cleaning, the cleaning fluid passes through the second through hole 12 and then acts on the first filter unit 3, so that the garbage attached to the first filter unit 3 falls off and is taken away by the cleaning fluid, achieving a better self-cleaning effect, improving the self-cleaning efficiency, and having a simple production process. It should be noted that the cleaning fluid can be gas, water or other fluid that can drive the garbage to fall off through flow, and it can be a single substance or a mixture of multiple substances.

[0033] Furthermore, the first filter unit 3 is provided with a first through hole 31, which is connected to the second through hole 12 and the third through hole 21 respectively. The inner wall surface of the first filter unit 3 is used for air intake, and the outer wall surface of the first filter unit 3 is used for air exhaust. That is, when vacuuming, air is taken in from the inner wall surface of the first filter unit 3, and then the air is exhausted from the outer wall surface of the first filter unit 3. Garbage, dust, etc. will be blocked by the inner wall surface of the first filter unit 3, thereby achieving a filtering effect. When cleaning, the cleaning fluid passes through the second through hole 12 and then acts on the first through hole 31, so that the garbage attached to the hole wall of the first through hole 31 falls off and is taken away by the cleaning fluid, thereby achieving a better self-cleaning effect.

[0034] Furthermore, at least one first mounting column 13 extending upward is provided on the bottom wall of the filter tank 11, the second through hole 12 is arranged on the first mounting column 13, and the second through hole 12 passes through the bottom wall of the base 1, at least one second mounting column 22 extending downward is provided on the bottom wall of the upper shell 2, the third through hole 21 is arranged on the second mounting column 22, and the second mounting column 22 passes through the top wall of the upper shell 2, one end of the first filter unit 3 is sleeved on a first mounting column 13, and the other end is sleeved on a second mounting column 22.

[0035] Furthermore, the first filter unit 3 is a straight-cylinder structure. During cleaning, the cleaning fluid directly passes through the straight-cylinder structure, making it easier for dust attached to the surface to separate from the inner wall of the first filter unit 3. It should be understood that the inner wall of the first filter unit 3 is the hole wall of the first through hole 31.

[0036] Furthermore, when there are multiple first filter units 3 , the multiple first filter units 3 are distributed in the filter tank 11 in a ring shape, which can improve the filtering efficiency.

[0037] Furthermore, the upper shell 2 is sealed and connected to the base 1 to form a cavity, and the first filter unit 3 is disposed in the cavity. When vacuuming, the airflow enters the first through hole 31 from the third through hole 21, enters the first filter unit 3 from the hole wall of the first through hole 31, is filtered, and is discharged from the outer wall of the first filter unit 3, and then enters the cavity between the filter tank 11 and the upper shell 2.

[0038] Furthermore, the upper shell is provided with an exhaust hole 23, and the air flow enters the first through hole 31 from the third through hole 21, enters the first filter unit 3 from the hole wall of the first through hole 31, and is discharged from the outer wall surface of the first filter unit 3 after filtration, and then enters the cavity between the filter tank 11 and the upper shell 2, and is finally discharged from the exhaust hole 23, and the garbage will adhere to the hole wall of the first through hole 31.

[0039] Furthermore, both ends of the first filter unit 3 are sealedly connected to the upper shell 2 and the base 1 respectively, so that garbage in the first filter unit 3 will not enter the cavity through the connection gap with the upper shell 2 or the connection gap with the base 1.

[0040] Furthermore, the bottom wall of the base 1 is an inverted cone structure, which is conducive to the airflow to quickly enter the third through hole 21.

[0041] Furthermore, the HEPA filter structure also includes at least one second filter unit 4, a fourth through hole 41 is provided on the second filter unit 4, at least two first mounting columns 13 extending upward are provided on the bottom wall of the filter tank 11, and at least two second mounting columns 22 extending downward are provided on the bottom wall of the upper shell 2. One end of the second filter unit 4 is sleeved on a first mounting column 13, and the other end is sleeved on a second mounting column 22. The fourth through hole 41 is respectively connected to a second through hole 12 and a third through hole 21.

[0042] Specifically, each first mounting column 13 is provided with a second through hole 12 , each second mounting column 22 is provided with a third through hole 21 , and the number of first mounting columns 13 is equal to the number of second mounting columns 22 , and is the sum of the number of first filter units 3 and the number of second filter units 4 .

[0043] Further, when there are multiple second filter units 4 , the multiple second filter units 4 are distributed in a ring shape in the filter tank 11 , the second filter unit 4 is located inside the first filter unit 3 , and the length of the second filter unit 4 is greater than that of the first filter unit 3 .

[0044] Further, the first filter unit 3 and the second filter unit 4 are both formed by enclosing filter paper, and the cross-sections of the first through hole 31 and the fourth through hole 41 are circular or elliptical. It is understandable that the cross-sections of the first through hole 31 and the fourth through hole 41 can be the same shape or different shapes. Preferably, the cross-sections of the first through hole 31 and the fourth through hole 41 are circular, and the first through hole 31 and the fourth through hole 41 are not easy to get stuck with garbage, and garbage on the hole walls of the first through hole 31 and the fourth through hole 41 can be easily removed during cleaning.

[0045] Preferably, the diameters of the first through hole 31 and the fourth through hole 41 are greater than or equal to 4 mm to prevent dust from being stuck in the first through hole 31 and the fourth through hole 41 .

[0046] It should be understood that the first filter unit 3 and the second filter unit 4 have the same structure or a similar structure.

[0047] See also Figure 4-Figure 6 The utility model also provides a filter for a vacuum cleaner, including a filter housing 5 and the above HEPA filter structure, wherein a mounting cavity 51 is provided inside the filter housing 5, the HEPA filter structure is mounted in the mounting cavity 51, and the side wall of the mounting cavity 51 is a breathable structure.

[0048] Furthermore, the filter housing 5 includes a filter bracket and a filter screen installed on the filter bracket, the filter bracket includes a first section, a second section and a third section arranged in sequence from top to bottom, the outer diameter of the first section is larger than the outer diameter of the second section and the outer diameter of the third section, the filter bracket is a coarse-at-top and fine-at-bottom structure, the filter screen is arranged on the outer wall of the second section, the third section is an inverted cone shape, and is provided with ribs arranged radially, the outer wall of the first section protrudes radially outward to form a spiral air guide groove extending downward in a spiral direction, and the spiral air guide groove is used to supply air flow into the outer side of the inverted filter screen in the dust suction mode.

[0049] In the dust collection mode, the airflow enters the outer side of the filter along the spiral air guide groove and then passes through the filter, enters from the third through hole 21 and then enters the first through hole 31 or the fourth through hole 41. Under the obstruction of the hole wall of the first through hole 31 or the fourth through hole 41, dust accumulates on the hole wall of the first through hole 31 or the fourth through hole 41, and the clean airflow passes through the hole wall of the first through hole 31 or the fourth through hole 41 and then enters the filter tank 11, and finally is discharged from the exhaust hole 23 on the upper shell 2. Preferably, the exhaust hole 23 is arranged in the middle of the upper shell 2, so that the airflow is discharged from the exhaust hole 23 after passing through the first filter unit 3 and the second filter unit 4 which are distributed in an annular manner.

[0050] The above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model.

Claims

1. A HEPA filter structure, characterized in that: It includes a base, an upper shell and at least one first filter unit, the base is provided with a filter groove, the upper shell cover is arranged on the base, the first filter unit is arranged in the filter groove, the bottom wall of the filter groove is provided with at least one second through hole, the upper shell is provided with at least one third through hole, one end of the first filter unit is connected with the second through hole, and the other end is connected with the third through hole.

2. The HEPA filter structure according to claim 1, characterized in that: The first filter unit is provided with a first through hole, which is communicated with the second through hole and the third through hole respectively. The inner wall surface of the first filter unit is used for air intake, and the outer wall surface of the first filter unit is used for air outlet.

3. The HEPA filter structure according to claim 2, characterized in that: At least one first mounting column extending upward is provided on the bottom wall of the filter tank, the second through hole is provided on the first mounting column, and the second through hole passes through the bottom wall of the base, at least one second mounting column extending downward is provided on the bottom wall of the upper shell body, the third through hole is provided on the second mounting column, and the second mounting column passes through the top wall of the upper shell body, one end of the first filter unit is sleeved on one of the first mounting columns, and the other end is sleeved on one of the second mounting columns.

4. The HEPA filter structure according to claim 2, characterized in that: The first filter unit is a straight-cylinder structure.

5. The HEPA filter structure according to claim 4, characterized in that: When there are multiple first filter units, the multiple first filter units are distributed in the filter tank in a ring shape.

6. The HEPA filter structure according to claim 2, characterized in that: The upper shell is sealed and connected to the base to form a cavity, and the first filter unit is disposed in the cavity.

7. The HEPA filter structure according to claim 6, characterized in that: The upper shell is provided with an exhaust hole, and the exhaust hole is communicated with the cavity.

8. The HEPA filter structure according to claim 3, characterized in that: Two ends of the first filter unit are sealed and connected to the upper shell and the base respectively.

9. The HEPA filter structure according to claim 2, characterized in that: The first filter unit is formed by enclosing filter paper, and the cross section of the first through hole is circular or elliptical.

10. A filter for a vacuum cleaner, characterized in that: It comprises a filter housing and a HEPA filter structure as described in any one of claims 1 to 9, wherein a mounting cavity is provided inside the filter housing, the HEPA filter structure is mounted in the mounting cavity, and a side wall of the mounting cavity is a breathable structure.

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