HEPA (High Efficiency Particulate Air) filter screen sealing and fixing assembly of air purifier

Abstract

The utility model relates to the field of air purifiers, and discloses an HEPA filter screen sealing and fixing assembly of an air purifier, the HEPA filter screen sealing and fixing assembly of the air purifier comprises a purification inner cylinder fixedly installed in the air purifier and an HEPA filter screen arranged in the purification inner cylinder, the HEPA filter screen comprises an outer frame and an HEPA filter element, the HEPA filter element is fixedly installed in the outer frame, and the HEPA filter element is fixedly installed in the outer frame. A bearing ring located below the HEPA filter screen is fixedly installed in the purification inner cylinder, and a lower sealing ring is fixedly installed at the top of the bearing ring. Compared with the prior art, the air purifier has the following advantages and effects that the HEPA filter screen can be conveniently installed and fixed and disassembled, taken out and replaced, operation is convenient and labor-saving, double sealing of the upper end and the lower end of the HEPA filter screen can be achieved when the HEPA filter screen is well installed and fixed and used, unfiltered air is effectively prevented from penetrating through a gap between the HEPA filter screen and the purification inner cylinder, and the air purifier is convenient to use. The sealing performance of the HEPA filter screen in the mounting, fixing and using period is improved, and the filtering effect of the air purifier is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air purifiers, in particular to a HEPA filter screen sealing and fixing assembly of an air purifier. BACKGROUND

[0002] The HEPA filter screen plays a core role in the air purifier and can effectively filter and remove tiny particulate matters in the air. The HEPA filter screen is interwoven by very fine fibers and is usually made of polypropylene (PP) or other composite materials, has a small pore size, a large adsorption capacity and a high purification efficiency.

[0003] In the related art, the sealing mode of the HEPA filter screen installed in the traditional air purifier mostly only uses a single sealing ring for sealing. With the increase of use time, the sealing performance is reduced, which easily causes the unfiltered air to pass through the gap beside the filter screen and directly enter the purified air flow, thereby affecting the air purification effect and reducing the purification efficiency and air quality guaranteeing capability of the air purifier. Moreover, the traditional HEPA filter screen installation and fixing mode is complicated to operate. When the HEPA filter screen is installed and replaced, professional tools are often needed, a lot of time and effort are consumed, and great inconvenience is brought to the user.

[0004] Therefore, the present application provides a HEPA filter screen sealing and fixing assembly of an air purifier to solve the above problems. CONTENT OF THE INVENTION

[0005] The present application aims to provide a HEPA filter screen sealing and fixing assembly of an air purifier, which can realize convenient installation, fixing, disassembly, removal and replacement of the HEPA filter screen, is convenient and labor-saving to operate, can realize double sealing of the upper and lower ends of the HEPA filter screen, effectively prevents the unfiltered air from passing through the gap between the HEPA filter screen and the purification inner cylinder, and improves the sealing performance effect of the HEPA filter screen during installation, fixing and use.

[0006] The above technical purpose of the present application is achieved by the following technical scheme: a HEPA filter screen sealing and fixing assembly of an air purifier, comprising a purification inner cylinder fixedly installed in the air purifier and a HEPA filter screen arranged in the purification inner cylinder, the HEPA filter screen comprises an outer frame and a HEPA filter core, the HEPA filter core is fixedly installed in the outer frame, a bearing ring is fixedly installed below the HEPA filter screen in the purification inner cylinder, a lower sealing ring is fixedly installed on the top of the bearing ring, the top of the lower sealing ring abuts against the bottom of the outer frame, a pressing mechanism for pressing and fixing the HEPA filter screen is arranged in the purification inner cylinder, the pressing mechanism comprises a pressing cover, a plurality of pressing columns and an upper sealing ring, an internal thread groove is formed in the top of the purification inner cylinder, the pressing cover is threadedly installed in the internal thread groove, the plurality of pressing columns are fixedly installed on the bottom of the pressing cover and are uniformly distributed, the bottom ends of the plurality of pressing columns abut against the top of the outer frame, and the upper sealing ring is arranged on the bottom of the pressing cover and abuts against the top of the outer frame.

[0007] Further, the top of the bearing ring is fixedly installed with a plurality of evenly distributed positioning pins, the bottom of the outer frame is provided with a plurality of evenly distributed positioning grooves, and the top ends of the plurality of positioning pins are slidably installed in the corresponding positioning grooves.

[0008] Further, the top of the pressing cover is provided with a ventilation hole, and the top of the pressing cover is fixedly installed with a plurality of evenly distributed protruding block handles.

[0009] Further, the top outer side of the pressing cover is provided with an external thread, and the external thread is matched with the internal thread groove.

[0010] Further, the bottom of the pressing cover is provided with an annular assembly groove, a movable ring is slidably installed in the annular assembly groove, the bottom of the movable ring extends out of the annular assembly groove, the upper sealing ring is fixedly installed on the bottom of the movable ring, the top of the movable ring is fixedly installed with a spring, and the top end of the spring is fixedly connected with the top inner wall of the annular assembly groove.

[0011] Further, the number of the spring is set to be a plurality, and the plurality of springs are evenly distributed.

[0012] Further, the top of the movable ring is provided with a plurality of evenly distributed guide grooves, a plurality of evenly distributed guide columns are fixedly installed on the top inner wall of the annular assembly groove, and the bottom ends of the plurality of guide columns are slidably installed in the corresponding guide grooves.

[0013] Further, the inner annular wall of the annular assembly groove and the outer surface of the movable ring are both smooth surface structures, and the movable ring and the inner annular wall of the annular assembly groove are slidably and sealingly fitted.

[0014] The present application has at least one of the following beneficial technical effects:

[0015] 1、The application can realize convenient installation, fixation, disassembly, removal and replacement of the HEPA filter screen through the cooperation of the bearing ring, the lower sealing ring and the pressing mechanism, which is convenient and labor-saving to operate, and can realize double sealing of the upper and lower ends of the HEPA filter screen during installation and fixation of the HEPA filter screen, effectively preventing unfiltered air from passing through the gap between the HEPA filter screen and the purification inner cylinder, improving the sealing performance during installation and fixation of the HEPA filter screen, and greatly improving the filtering effect of the air purifier.

[0016] 2、The application can make the upper sealing ring adapt to the shape and position change of the top of the outer frame through the cooperation of the movable ring and the plurality of springs, so that the upper sealing ring and the top surface of the outer frame maintain good sealing, improve the sealing guarantee, and even if the outer frame has certain manufacturing errors or deformation and the upper sealing ring is worn after long-term use, the sealing state can be maintained. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a front view of the embodiment.

[0018] Figure 2 is a front view of the embodiment.

[0019] Figure 3 is a front view of the embodiment.

[0020] Figure 4 is an enlarged structure diagram of part A in Figure 2

[0021] Figure 5 is a three-dimensional structure diagram of the bearing ring and the lower sealing ring.

[0022] Figure 6 is a three-dimensional structure diagram of the pressing mechanism.

[0023] Figure 7 is a partial three-dimensional structure diagram of the pressing mechanism.

[0024] In the figure, 1, purification inner cylinder; 2, HEPA filter screen; 201, outer frame; 202, HEPA filter core; 203, positioning groove; 3, bearing ring; 301, positioning bolt; 4, lower sealing ring; 5, internal thread groove; 6, gland; 7, pressing column; 8, upper sealing ring; 9, annular assembly groove; 10, movable ring; 11, spring; 12, guide groove; 13, guide column; 14, air hole; 15, protruding block handle. DETAILED DESCRIPTION

[0025] ​The technical solutions of the present application will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0026] Referring to Figures 1-7 The present application provides a HEPA filter screen sealing and fixing assembly of an air purifier, comprising a purification inner cylinder 1 fixedly installed in the air purifier and a HEPA filter screen 2 arranged in the purification inner cylinder 1, the HEPA filter screen 2 comprising an outer frame 201 and a HEPA filter core 202, the HEPA filter core 202 being fixedly installed in the outer frame 201, and a bearing ring 3 being fixedly installed in the purification inner cylinder 1 below the HEPA filter screen 2, the top of the bearing ring 3 being fixedly installed with a lower sealing ring 4, and the top of the lower sealing ring 4 abutting against the bottom of the outer frame 201.

[0027] In the embodiment, a pressing mechanism for pressing and fixing the HEPA filter screen 2 is arranged in the purification inner cylinder 1, the pressing mechanism comprising a pressing cover 6, a plurality of pressing columns 7 and an upper sealing ring 8, the top of the purification inner cylinder 1 being provided with an internal thread groove 5, the pressing cover 6 being threadedly installed in the internal thread groove 5, the plurality of pressing columns 7 being fixedly installed at the bottom of the pressing cover 6 and being uniformly distributed, the bottom ends of the plurality of pressing columns 7 abutting against the top of the outer frame 201, the top outer side of the pressing cover 6 being provided with an external thread, the external thread being matched with the internal thread groove 5, the pressing cover 6 being threadedly installed in the internal thread groove 5, the operation being simple and convenient, the pressing and fixing of the HEPA filter screen 2 being realized only by rotating the pressing cover 6, the pressing cover 6 being conveniently screwed out, the HEPA filter screen 2 being taken out, and the effect of conveniently replacing the HEPA filter screen 2 being realized, the plurality of pressing columns 7 being uniformly distributed at the bottom of the pressing cover 6, a uniform pressure being formed on the outer frame 201 of the HEPA filter screen 2, the stability of the HEPA filter screen 2 during use being ensured, and damage of the filter screen due to uneven local stress being avoided, the upper sealing ring 8 being arranged at the bottom of the pressing cover 6, the upper sealing ring 8 abutting against the top of the outer frame 201, the lower sealing ring 4 abutting against the bottom of the outer frame 201 and the upper sealing ring 8 abutting against the top of the outer frame 201, double sealing of the upper and lower ends of the HEPA filter screen 2 being realized, the unfiltered air being effectively prevented from passing through the gap between the HEPA filter screen 2 and the purification inner cylinder 1, the sealing performance during installation, fixation and use of the HEPA filter screen 2 being improved, and the filtering effect of the air purifier being greatly improved.

[0028] In this embodiment, the top of the bearing ring 3 is fixedly provided with a plurality of positioning pins 301 uniformly distributed, the bottom of the outer frame 201 is provided with a plurality of positioning grooves 203 uniformly distributed, the top of each of the plurality of positioning pins 301 is slidingly installed in the corresponding positioning groove 203, and the sliding insertion cooperation of the positioning pins 301 and the positioning grooves 203 not only plays a positioning role during installation, but also prevents the HEPA filter screen 2 from being displaced during use.

[0029] In this embodiment, the top of the gland 6 is provided with a ventilation hole 14, the design of the ventilation hole 14 ensures that the uncleaned air can smoothly pass through the gland 6, so that the air purification process is smooth, and the top of the gland 6 is fixedly provided with a plurality of protruding knob handles 15 uniformly distributed, the design of the protruding knob handles 15 provides convenience for rotating the gland 6, and improves the efficiency of installation and disassembly.

[0030] In this embodiment, the bottom of the gland 6 is provided with an annular assembly groove 9, and a movable ring 10 is slidingly installed in the annular assembly groove 9, the bottom of the movable ring 10 extends out of the annular assembly groove 9, the upper sealing ring 8 is fixedly installed at the bottom of the movable ring 10, the top of the movable ring 10 is fixedly provided with a spring 11, the top of the spring 11 is fixedly connected with the inner wall of the top of the annular assembly groove 9, and the design of the spring 11 and the movable ring 10 can make the upper sealing ring 8 adapt to the surface condition of the top of the outer frame 201, so that the upper sealing ring 8 is more closely attached to the top surface of the outer frame 201, and the sealing effect is further enhanced, even if there is a manufacturing error or deformation of the outer frame 201 or the upper sealing ring 8 is worn after long-term use, the sealing state can also be maintained well, and the number of the spring 11 is set to be multiple, the multiple springs 11 are uniformly distributed, and the multiple springs 11 are cooperated to make the force applied to the upper sealing ring 8 by the spring 11 more balanced, so that the upper sealing ring 8 is closely attached to the top surface of the outer frame 201.

[0031] In this embodiment, the top of the movable ring 10 is provided with a plurality of guide grooves 12 uniformly distributed, a plurality of guide columns 13 are fixedly installed on the inner wall of the top of the annular assembly groove 9, the bottom of each of the plurality of guide columns 13 is slidingly installed in the corresponding guide groove 12, and the cooperation of the spring 11 and the guide column 13 and the guide groove 12 not only realizes the self-adaptive adjustment of the upper sealing ring 8, but also limits the movement track of the movable ring 10 to prevent it from being deviated during use, so as to ensure the stability of the structure and prolong the service life of the assembly.

[0032] In this embodiment, the inner ring wall of the annular assembly groove 9 and the outer surface of the movable ring 10 are both smooth surface structures, and the movable ring 10 is in sliding sealing fit with the inner ring wall of the annular assembly groove 9, which can ensure that the uncleaned air cannot enter the annular assembly groove 9, and further improve the sealing performance during the installation and use of the HEPA filter screen 2.

[0033] Through the above structure, the HEPA filter screen sealing and fixing assembly of the air purifier provided by the present application has the following advantages when in use:

[0034] When installing the HEPA filter screen 2, the positioning slot 203 at the bottom of the outer frame 201 is aligned with the positioning pin 301 at the top of the bearing ring 3, so that the positioning pin 301 slides into the corresponding positioning slot 203, providing precise positioning for the installation of the HEPA filter screen 2 and guiding the HEPA filter screen 2 to be installed to the correct position. Then, the gland 6 with the lug handle 15 is rotated, and because the outer threads at the top of the gland 6 are adapted to the inner thread grooves 5 at the top of the purification inner cylinder 1, the upper sealing ring 8 at the bottom of the gland 6 tightly abuts against the top of the outer frame 201 during the rotation of the gland 6 into the inner thread grooves 5. Until the multiple pressing columns 7 at the bottom of the gland 6 gradually come into contact with the top of the outer frame 201 and exert downward pressure, the pressing and fixing operation of the HEPA filter screen 2 is completed, and the air filtering use can be performed.

[0035] During the air filtering use after the HEPA filter screen 2 is fixed, the lower sealing ring 4 tightly contacts the bottom of the outer frame 201, and the upper sealing ring 8 tightly abuts against the top of the outer frame 201, thereby achieving double sealing of the upper and lower ends of the HEPA filter screen 2 and effectively preventing the unfiltered air from passing through the gap between the HEPA filter screen 2 and the purification inner cylinder 1, which improves the sealing performance during the installation and use of the HEPA filter screen 2 and greatly improves the filtering effect of the air purifier. At the same time, the movable ring 10 can adapt to the shape and position changes of the top of the outer frame 201 under the elastic force of the multiple springs 11, so that the upper sealing ring 8 can maintain good abutment and sealing with the top surface of the outer frame 201, thereby improving the sealing guarantee.

[0036] When the HEPA filter screen 2 needs to be disassembled and replaced, the gland 6 is only needed to be rotated out of the inner thread grooves 5, so that the pressing and fixing of the HEPA filter screen 2 are released, the HEPA filter screen 2 can be taken out of the purification inner cylinder 1, and then the above operation steps are performed to install a new HEPA filter screen 2, thereby achieving convenient disassembly and replacement of the HEPA filter screen 2, which is convenient and labor-saving.

Claims

1. A HEPA filter screen sealing and fixing assembly of an air cleaner, characterized in that, The application relates to an air purifier, which comprises a purifying inner cylinder (1) fixedly installed in the air purifier and a HEPA filter screen (2) arranged in the purifying inner cylinder (1), wherein the HEPA filter screen (2) comprises an outer frame (201) and a HEPA filter core (202) fixedly installed in the outer frame (201), a bearing ring (3) is fixedly installed below the HEPA filter screen (2) in the purifying inner cylinder (1), a lower sealing ring (4) is fixedly installed on the top of the bearing ring (3), the top of the lower sealing ring (4) abuts against the bottom of the outer frame (201), a pressing mechanism for pressing and fixing the HEPA filter screen (2) is arranged in the purifying inner cylinder (1), the pressing mechanism comprises a pressing cover (6), a plurality of pressing columns (7) and an upper sealing ring (8), an inner thread groove (5) is formed in the top of the purifying inner cylinder (1), the pressing cover (6) is threadedly installed in the inner thread groove (5), the plurality of pressing columns (7) are fixedly installed on the bottom of the pressing cover (6) and are uniformly distributed, the bottom ends of the plurality of pressing columns (7) abut against the top of the outer frame (201), and the upper sealing ring (8) is arranged on the bottom of the pressing cover (6) and abuts against the top of the outer frame (201).

2. The HEPA filter sealing and fixing assembly of the air cleaner according to claim 1, wherein: A plurality of positioning pins (301) are fixedly installed on the top of the bearing ring (3) and are uniformly distributed, a plurality of positioning grooves (203) are formed in the bottom of the outer frame (201) and are uniformly distributed, and the top ends of the plurality of positioning pins (301) are slidably installed in the corresponding positioning grooves (203).

3. The HEPA filter sealing and fixing assembly of the air cleaner according to claim 1, wherein: Ventilation holes (14) are formed in the top of the pressing cover (6), and a plurality of convex block handles (15) are fixedly installed on the top of the pressing cover (6) and are uniformly distributed.

4. The HEPA filter sealing and fixing assembly of the air cleaner according to claim 1, wherein: An outer thread is formed on the top outer side of the pressing cover (6) and is matched with the inner thread groove (5).

5. The HEPA filter sealing and fixing assembly of the air cleaner according to claim 1, wherein: An annular assembly groove (9) is formed in the bottom of the pressing cover (6), a movable ring (10) is slidably installed in the annular assembly groove (9), the bottom of the movable ring (10) extends out of the annular assembly groove (9), the upper sealing ring (8) is fixedly installed on the bottom of the movable ring (10), a spring (11) is fixedly installed on the top of the movable ring (10), and the top end of the spring (11) is fixedly connected with the inner wall of the top of the annular assembly groove (9).

6. The HEPA filter sealing and fixing assembly of the air cleaner according to claim 5, wherein: The number of the springs (11) is multiple, and the multiple springs (11) are uniformly distributed.

7. The HEPA filter sealing and fixing assembly of the air cleaner according to claim 5, wherein: A plurality of guide grooves (12) are formed in the top of the movable ring (10) and are uniformly distributed, a plurality of guide columns (13) are fixedly installed on the inner wall of the top of the annular assembly groove (9) and are uniformly distributed, and the bottom ends of the plurality of guide columns (13) are slidably installed in the corresponding guide grooves (12).

8. The HEPA filter sealing and fixing assembly of the air cleaner according to claim 5, wherein: The inner ring wall of the annular assembly groove (9) and the outer surface of the movable ring (10) are both smooth surfaces, and the movable ring (10) is slidably and sealingly matched with the inner ring wall of the annular assembly groove (9).

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