Air purifier with filter element convenient to replace

Abstract

The invention relates to the field of air purification equipment, in particular to an air purifier with a filter element convenient to replace, which comprises a purifier body, the purifier body comprises a filter element mounting shell, an air filter element is arranged in the filter element mounting shell, a base is arranged at the lower end of the filter element mounting shell, and a coaming extending into the filter element mounting shell is arranged at the base. A lifting mechanism mounting cavity is formed between the surrounding plate and the base, a lifting mechanism is arranged in the lifting mechanism mounting cavity, and a connecting mechanism used for connecting the base with the filter element mounting shell is further arranged in the lifting mechanism mounting cavity. According to the air filter, the limiting plate is connected with the limiting groove in a pluggable mode, the air filter element can be replaced conveniently, screws do not need to be disassembled when the air filter element is replaced and the filter element mounting shell is disassembled, the problems of shell deformation, screw hole loosening, screw hole damage and the like cannot be caused by repeated operation, the structural stability of equipment is not affected by the replacement frequency, and the service life of the equipment is prolonged. The service life of equipment is obviously prolonged.

Description

Technical Field

[0001] This invention relates to the field of air purification equipment, and more specifically, to an air purifier with a convenient filter replacement element. Background Technology

[0002] Air purifiers, as core equipment for improving indoor air quality, have been widely used in various places such as homes, offices, and medical facilities, and their market demand and technological research and development attention are both showing a rapid growth trend.

[0003] The core purification component of an air purifier is the air filter, which removes pollutants from the air through physical filtration, adsorption, or catalysis. However, over time, the filter's purification efficiency decreases due to pollutant buildup. Therefore, regular filter replacement is essential to ensure the stable operation of the air purifier. Currently, air purifiers on the market generally suffer from two major problems in filter design and installation structure that urgently need to be addressed, severely impacting user experience and device adaptability.

[0004] On the one hand, filter replacement is cumbersome and inconvenient to maintain. Most existing air purifier filters use a closed installation structure, with the filter typically fixed inside the purifier housing, which is then secured to the base or main frame with multiple screws. When filter replacement is needed, users must use screwdrivers or other specialized tools to remove each screw individually, open the housing, and then reposition and tighten the housing. This process is not only complex and time-consuming, but also particularly inconvenient for elderly users, women, and other groups with limited manual dexterity. Furthermore, repeated screw removal can lead to thread wear, housing deformation, reduced structural stability and lifespan, and may even cause sealing issues due to improper installation, affecting purification performance.

[0005] On the other hand, the equipment has poor adaptability to filter specifications and lacks versatility. Users have different needs for purification efficiency and air resistance performance in different usage scenarios, resulting in a variety of diameters and heights for air filters on the market. However, the filter installation cavity size of existing air purifiers is mostly a fixed structure, and the positions of its internal support and positioning components cannot be adjusted, allowing only a single filter specification to be used. If users need to replace the filter with a different specification to meet specific purification needs, or if they cannot obtain the same specification filter due to purchasing channel limitations, they can only replace the entire air purifier or modify the equipment casing. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution.

[0007] An air purifier with easy filter replacement includes a purifier body, which includes a filter mounting housing. An air filter is housed in the filter mounting housing, and multiple air inlets are provided at the filter mounting housing. A base is provided at the lower end of the filter mounting housing, and a surrounding plate extending into the filter mounting housing is provided at the base. A lifting mechanism mounting cavity is formed between the surrounding plate and the base. A lifting mechanism is provided in the lifting mechanism mounting cavity. The lifting mechanism includes a support plate for supporting the lower end of the air filter. The support plate is movable along the height direction of the filter mounting housing. A connecting mechanism for connecting the base and the filter mounting housing is also provided in the lifting mechanism mounting cavity. A fan mounting housing is provided at the upper end of the filter mounting housing. The lower end face of the fan mounting housing and the support plate together clamp the air filter. An air extraction mechanism for extracting air from the filter mounting housing is provided in the fan mounting housing.

[0008] As a preferred embodiment of the present invention, the lifting mechanism includes a mounting bracket disposed in the mounting cavity of the lifting mechanism, a support block slidably disposed at the mounting bracket, a connecting rod connected to a support plate disposed at the support block, a lead screw rotatably disposed at the mounting bracket passing through the support block, a lead screw nut cooperating with the lead screw disposed at the support block, a first bevel gear connected to the bottom end of the lead screw, a second bevel gear cooperating with the first bevel gear rotatably disposed at the mounting bracket, and a drive rod for driving the second bevel gear rotatably disposed in the mounting cavity of the lifting mechanism.

[0009] As a preferred embodiment of the present invention, the mounting bracket is provided with a slide rail arranged along its height direction, and the support block is provided with a slider that cooperates with the slide rail.

[0010] As a preferred embodiment of the present invention, one end of the drive rod extends out of the enclosure plate, and the filter element mounting housing is provided with a housing groove corresponding to the end of the drive rod extending out of the enclosure plate for the drive rod to pass through. The end of the drive rod passes through the housing groove, and a handwheel is provided at the end of the drive rod passing through the housing groove.

[0011] As a preferred embodiment of the present invention, the mounting bracket is provided with a bevel gear mounting through hole, the second bevel gear is provided with a connecting sleeve that is clearance-fitted with the bevel gear mounting through hole, the end of the connecting sleeve extends out of the bevel gear mounting through hole, and the end of the connecting sleeve extending out of the bevel gear mounting through hole is provided with an annular plate for limiting the rotation of the second bevel gear in the bevel gear mounting through hole.

[0012] As a preferred embodiment of the present invention, the second bevel gear is provided with a second bevel gear through hole for the drive rod to pass through, the middle part of the drive rod is provided with a strip groove arranged along its axial direction, and the inner wall of the second bevel gear through hole is provided with a protrusion that extends into the strip groove and is in clearance fit with the strip groove.

[0013] As a preferred embodiment of the present invention, an L-shaped plate is provided in the mounting cavity of the lifting mechanism and at the other end near the drive rod. The L-shaped plate has multiple slots at the end face of the drive rod, which are evenly distributed circumferentially along the central axis of the drive rod. The end of the drive rod near the L-shaped plate expands outward to form an expansion portion, and multiple locking teeth are provided at the expansion portion. The end of the drive rod near the handwheel expands outward to form a first shoulder. A first spring is sleeved on the drive rod between the surrounding plate and the first shoulder. The first spring is used to push the drive rod to move so that the locking teeth at the expansion portion abut into the slots.

[0014] In a preferred embodiment of the present invention, the end of the drive rod near the L-shaped plate expands outward to form a second shoulder. Inclined surfaces are provided at the adjacent points of the first shoulder and the drive rod, and at the adjacent points of the second shoulder and the drive rod. There are two sets of connecting mechanisms, each set including two mounting seats, symmetrically arranged at the first shoulder or the second shoulder. A cover plate is provided at each mounting seat, forming a strip-shaped through hole between the cover plate and the mounting seat. A limiting plate is slidably disposed in the strip-shaped through hole. A surrounding plate through hole is provided at the end corresponding to the limiting plate at the surrounding plate. The filter element mounting housing is corresponding to the surrounding plate through hole. The end of the plate through hole is provided with a limiting groove. The first shoulder and the second shoulder are used to squeeze the limiting plate so that the end of the limiting plate passes through the through hole of the surrounding plate and extends into the limiting groove to fix the filter element mounting housing. The mounting base is provided with a spring mounting cavity. The bottom end face of the limiting plate is provided with a spring mounting plate extending into the spring mounting cavity. A second spring is provided between the spring mounting plate and the inner wall of the spring mounting cavity. The second spring is used to pull the end of the limiting plate out of the limiting groove when the first shoulder and the second shoulder are misaligned with the limiting plate to release the fixation of the filter element mounting housing.

[0015] As a preferred embodiment of the present invention, rubber pads are provided on the lower end face of the fan mounting housing and the upper end face of the support plate.

[0016] As a preferred embodiment of the present invention, the fan mounting housing is provided with a housing exhaust port located at the upper end of the air filter element, and the air extraction mechanism includes an extraction fan disposed in the fan mounting housing and covering the housing exhaust port. The upper end of the fan mounting housing is provided with a sealing plate for sealing the fan mounting housing, and the sealing plate is provided with a sealing plate exhaust port. The bottom end face of the sealing plate is provided with a rubber sealing ring located between the extraction fan and the sealing plate.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. The present invention adopts a "plug-in" connection between the limiting plate and the limiting groove, which can facilitate the replacement of the air filter element. When replacing the air filter element, there is no need to remove the screws when disassembling and installing the filter element and the housing. Repeated operation will not cause problems such as housing deformation, loosening or damage of screw holes. The structural stability of the equipment is not affected by the number of replacements, and the service life of the equipment is significantly extended.

[0019] 2. The present invention, through the setting of the lifting mechanism structure, can realize stepless adjustment of the height of the support plate. When installing air filters of different heights, the support plate can be pushed up by turning the handwheel until it cooperates with the fan mounting housing to press the air filter tightly. There is no need to replace or modify the equipment parts, so it can be adapted to air filters of different heights, thus having better adaptability.

[0020] 3. When installing the air filter element, the present invention only requires that the inner diameter of the air filter element be larger than the diameter of the exhaust port of the housing. The interior of the housing for installing the filter element is an open adaptability space, without restricting the outer diameter of the air filter element, thereby improving the practicality and market adaptability of the equipment. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the air purifier with easy filter replacement shown in Example 1;

[0022] Figure 2 This is a cross-sectional view of the air purifier with easy filter replacement shown in Example 1;

[0023] Figure 3 This is a schematic diagram of the lifting mechanism and connecting mechanism in Example 1;

[0024] Figure 4 This is a schematic diagram of the filter element mounting housing in Example 1;

[0025] Figure 5 This is a schematic diagram of the mounting bracket in Example 1;

[0026] Figure 6 This is a schematic diagram of the structure of the second bevel gear in Example 1;

[0027] Figure 7 This is a schematic diagram of the drive rod structure in Example 1;

[0028] Figure 8 This is a schematic diagram of the L-shaped plate in Example 1;

[0029] Figure 9 This is a schematic diagram of the mounting base, cover plate, and limiting plate in Example 1;

[0030] Figure 10 This is a schematic diagram of the installation of the lifting mechanism and the connecting mechanism in Example 1;

[0031] Figure 11 This is an exploded view of the air extraction mechanism in Example 1.

[0032] The attached figures are labeled as follows:

[0033] 100. Purifier body; 110. Filter element mounting housing; 111. Air inlet; 120. Base; 130. Fan mounting housing; 140. Handwheel; 210. Air filter element; 220. Enclosure; 230. Lifting mechanism mounting cavity; 240. Support plate; 260. Drive rod; 270. Rubber pad; 250. Mounting bracket; 310. Support block; 320. Connecting rod; 330. Lead screw; 340. Lead screw nut; 350. First bevel gear; 360. Second bevel gear; 370. Slide rail; 380. Slider; 390. L-shaped plate; 3100. First spring; 3120. Cover plate; 3130. Limiting plate; 410. Housing groove ; 420, Limiting groove; 510, Bevel gear mounting through hole; 610, Connecting sleeve; 620, Annular plate; 630, Second bevel gear through hole; 640, Protrusion; 710, Strip groove; 720, Expansion part; 730, Gear; 740, First shoulder; 750, Second shoulder; 760, Inclined surface; 810, Slot; 910, Strip through hole; 920, Spring mounting cavity; 930, Spring mounting plate; 940, Second spring; 3110, Mounting base; 1010, Enclosure through hole; 1110, Housing exhaust port; 1120, Exhaust fan; 1130, Sealing plate; 1140, Sealing plate exhaust port; 1150, Rubber sealing ring. Detailed Implementation

[0034] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are merely illustrative and not limiting of the invention.

[0035] Example 1, as Figure 1-11 As shown, this embodiment provides an air purifier with convenient filter replacement, which includes a purifier body 100. The purifier body 100 includes a filter mounting housing 110, a base 120, a fan mounting housing 130, and a handwheel 140. The filter mounting housing 110 is provided with a plurality of air inlets 111 evenly distributed circumferentially. The side wall of the filter mounting housing 110 is provided with a housing groove 410 for the drive rod 260 to pass through at the end of the drive rod 260 extending out of the surrounding plate 220. The inner wall of the filter mounting housing 110 is provided with a groove 410 at the end of the limiting plate 3130. The limiting groove 420; the filter element mounting housing 110 is equipped with an air filter element 210, the lower end of the air filter element 210 is supported by a support plate 240, and the upper end of the air filter element 210 mates with the lower end face of the fan mounting housing 130 to clamp the air filter element 210; the upper end of the base 120 is fixedly provided with a surrounding plate 220 that extends into the filter element mounting housing 110, and the surrounding plate 220 and the base 120 enclose to form a lifting mechanism mounting cavity 230, and a surrounding plate through hole 1010 is opened at the end position of the limiting plate 3130 corresponding to the surrounding plate 220.

[0036] A mounting bracket 250 is fixedly installed inside the mounting cavity 230 of the lifting mechanism. A bevel gear mounting through hole 510 is provided at the mounting bracket 250, and a slide rail 370 is fixedly installed on the mounting bracket 250 along its height direction. A lead screw 330 rotatably passes through the support block 310 at the mounting bracket 250, and a first bevel gear 350 is connected to the bottom end of the lead screw 330. A support block 310 is slidably installed at the mounting bracket 250, and a lead screw nut 340 that cooperates with the lead screw 330 is fixedly installed at the support block 310. A slider 380 that cooperates with the slide rail 370 is also fixedly installed at the support block 310. A connecting rod 320 that connects to the support plate 240 is also provided at the support block 310, and the upper end of the connecting rod 320 is fixedly connected to the support plate 240. The frame 250 is rotatably fitted with a second bevel gear 360 through a bevel gear mounting through hole 510. The second bevel gear 360 meshes with the first bevel gear 350. A connecting sleeve 610 is provided at the second bevel gear 360, which is clearance-fitted with the bevel gear mounting through hole 510. The end of the connecting sleeve 610 extends out of the bevel gear mounting through hole 510. An annular plate 620 is provided at the end of the connecting sleeve 610 extending out of the bevel gear mounting through hole 510 to limit the rotation of the second bevel gear 360 within the bevel gear mounting through hole 510. A second bevel gear through hole 630 is provided at the second bevel gear 360 for the drive rod 260 to pass through. A protrusion 640 is provided in the inner wall of the second bevel gear through hole 630, which extends into the strip groove 710 and is clearance-fitted with the strip groove 710.

[0037] A drive rod 260 for driving the second bevel gear 360 is rotatably mounted in the lifting mechanism mounting cavity 230. A strip-shaped groove 710 is provided in the middle of the drive rod 260 along its axial direction. One end of the drive rod 260 extends out of the surrounding plate 220, and this end passes through the housing groove 410 and extends to the outside of the filter element mounting housing 110. A handwheel 140 is provided at the end of the drive rod 260 passing through the housing groove 410. The end of the drive rod 260 near the handwheel 140 expands outward to form a first shoulder 740, and the end of the drive rod 260 near the L-shaped plate 390 expands outward to form an expansion portion 720 and a second shoulder 750. Multiple locking teeth 73 are provided at the expansion portion 720. 0; Inclined surfaces 760 are provided at the adjacent positions of the first shoulder 740 and the drive rod 260, and at the adjacent positions of the second shoulder 750 and the drive rod 260; A first spring 3100 is sleeved on the drive rod 260, the first spring 3100 is located between the surrounding plate 220 and the first shoulder 740, and the first spring 3100 is used to push the drive rod 260 to move so that the locking teeth 730 at the expansion part 720 abut into the locking groove 810; An L-shaped plate 390 is provided in the lifting mechanism mounting cavity 230 and near the other end of the drive rod 260, and the L-shaped plate 390 is provided with multiple locking grooves 810 at the end face of the drive rod 260, and the multiple locking grooves 810 are evenly distributed circumferentially along the central axis of the drive rod 260.

[0038] The lifting mechanism mounting cavity 230 is provided with a connecting mechanism for connecting the base 120 and the filter element mounting housing 110. There are two sets of connecting mechanisms, each set including two mounting seats 3110, symmetrically arranged at the first shoulder 740 or the second shoulder 750. A cover plate 3120 is provided at each mounting seat 3110, forming a strip-shaped through hole 910 between the cover plate 3120 and the mounting seat 3110. A limiting plate 3130 is slidably disposed in the strip-shaped through hole 910. A spring mounting cavity 920 is provided at the mounting seat 3110, and a spring mounting cavity is provided on the bottom end face of the limiting plate 3130. A spring mounting plate 930 is provided in cavity 920. A second spring 940 is provided between the spring mounting plate 930 and the inner wall of the spring mounting cavity 920. The second spring 940 is used to pull the end of the limiting plate 3130 out of the limiting groove 420 to release the fixation of the filter element mounting housing 110 when the first shoulder 740 and the second shoulder 750 are misaligned with the limiting plate 3130. The first shoulder 740 and the second shoulder 750 are used to squeeze the limiting plate 3130 so that the end of the limiting plate 3130 passes through the surrounding plate through hole 1010 and extends into the limiting groove 420, thereby fixing the filter element mounting housing 110.

[0039] The upper end of the filter element mounting housing 110 is provided with a fan mounting housing 130. The lower end face of the fan mounting housing 130 and the support plate 240 together clamp the air filter element 210. Rubber pads 270 are provided on the lower end face of the fan mounting housing 130 and the upper end face of the support plate 240. The fan mounting housing 130 is provided with a housing exhaust port 1110 located at the upper end of the air filter element 210. The fan mounting housing 130 is provided with a cavity for the hollow filter element mounting housing 110. The air extraction mechanism includes an extraction fan 1120 disposed in the fan mounting housing 130 and covering the housing exhaust port 1110; the upper end of the fan mounting housing 130 is provided with a sealing plate 1130 for sealing the fan mounting housing 130, the sealing plate 1130 is provided with a sealing plate exhaust port 1140, and the bottom end face of the sealing plate 1130 is provided with a rubber sealing ring 1150 located between the extraction fan 1120 and the sealing plate 1130.

[0040] When the purifier body 110 is in use, the first spring 3100 is in a naturally extended state. Its elastic thrust pushes the drive rod 260 towards the L-shaped plate 390, causing the multiple teeth 730 at the expansion portion 720 of the drive rod 260 to precisely engage with the slots 810 of the L-shaped plate 390, achieving circumferential positioning of the drive rod 260 and preventing the drive rod 260 from rotating during equipment operation. At the same time, the first shoulder 740 and the second shoulder 750 of the drive rod 260 press against the limiting plate 3130 through their adjacent inclined surfaces 760. The limiting plate 3130 slides along the strip-shaped through hole 910 toward the filter element mounting housing 110. The end of the limiting plate 3130 passes through the surrounding plate through hole 1010 and extends into the limiting groove 420, thus achieving a firm connection between the base 120 and the filter element mounting housing 110. At this time, the support plate 240 and the lower end face of the fan mounting housing 130 jointly clamp the air filter element 210, and the rubber pad 270 is in a slightly compressed state, which not only provides buffer protection for the air filter element 210, but also fills the tiny gaps between the clamping surfaces, forming a preliminary seal.

[0041] When the air filter 210 needs to be replaced, the drive rod 260 is manually pulled towards the handwheel 140. The drive rod 260 moves along its own axis away from the L-shaped plate 390, and the first spring 3100 is compressed. As the drive rod 260 moves, on the one hand, the retaining teeth 730 of the expansion part 720 disengage from the retaining groove 810, releasing the circumferential positioning of the drive rod 260; on the other hand, the first shoulder 740 and the second shoulder 750 move synchronously with the drive rod 260. The first shoulder 740 and the second shoulder 750 are disengaged from the limiting plate 3130 (i.e., the first shoulder 740 and the second shoulder 750 are misaligned with the limiting plate 3130). The second spring 940 releases its elastic potential energy, pulling the spring mounting plate 930 along the spring mounting cavity 920 into the mounting base 3110. The spring mounting plate 930 drives the limiting plate 3130 to retract synchronously. The end of the limiting plate 3130 is pulled out from the limiting groove 420, completely releasing the fixed restriction between the base 120 and the filter element mounting housing 110.

[0042] Pull the filter element mounting housing 110 upwards, and the drive rod 260 slides relative to the housing groove 410, so that the filter element mounting housing 110 is separated from the base 120; after the filter element mounting housing 110 is removed, the old air filter 210 can be directly taken out from its inside, and the whole process does not require disassembling the screws.

[0043] When placing a new air filter 210, first select a suitable new air filter 210 (the inner diameter of the air filter 210 should be larger than the diameter of the housing exhaust port 1110 to ensure that the airflow can smoothly enter the housing exhaust port 1110). Place the new air filter 210 directly into the filter installation housing 110 to complete the initial placement of the filter.

[0044] Then, align the filter element mounting housing 110 with the surrounding plate 220 on the base 120 and slowly lower it so that the surrounding plate 220 smoothly extends into the filter element mounting housing 110 until the lower end face of the filter element mounting housing 110 is in contact with the upper end face of the base 120. At this time, the through hole 1010 of the surrounding plate and the limiting groove 420 are in a corresponding state, which prepares the positioning for the subsequent extension of the limiting plate 3130.

[0045] Loosen the handwheel 140 (at this time, the first spring 3100 is not fully extended, the locking teeth 730 and the locking groove 810 are not engaged, leaving room for the drive rod 260 to rotate). The first spring 3100 releases some elastic potential energy, pushing the drive rod 260 to move towards the L-shaped plate 390. The inclined surfaces 760 of the first shoulder 740 and the second shoulder 750 press the limiting plate 3130 again, causing the limiting plate 3130 to slide along the strip-shaped through hole 910 towards the filter element mounting housing 110. The end passes through the surrounding plate through hole 1010 and extends into the limiting groove 420, achieving the initial fixation of the filter element mounting housing 110 and the base 120, and preventing the housing from shifting when adjusting the height of the support plate later.

[0046] When the handwheel 140 is manually turned, the drive rod 260 can rotate freely around its own axis because the retaining tooth 730 is not engaged with the retaining groove 810. The drive rod 260 engages with the protrusion 640 on the inner wall of the second bevel gear through the central strip groove 710 (the strip groove 710 slides along the protrusion 640 without affecting the rotation of the drive rod 260), driving the second bevel gear 360 to rotate synchronously. The second bevel gear 360 meshes with the first bevel gear 350, thereby driving the first bevel gear 350 and the lead screw 330 to rotate. The lead screw 330 is threadedly engaged with the lead screw nut 340 on the support block 310, while the support block 310 is connected to the slider 38. The slide rail 370 of the mounting bracket 250 slides and engages with the screw 330, and the rotational motion of the screw 330 is converted into the vertical upward movement of the support block 310. The support block 310 drives the support plate 240 to move upward along the height direction of the filter element mounting housing 110 through the connecting rod 320. The handwheel 140 is continuously rotated until the rubber pad 270 at the upper end of the support plate 240 is tightly attached to the lower end face of the new air filter element 210, and the upper end face of the air filter element 210 is pressed against the rubber pad 270 at the lower end face of the fan mounting housing 130. The handwheel 140 can no longer be rotated (at this time, the air filter element 210 is stably clamped), thus completing the height adaptation and fixation of the filter element.

[0047] After the air filter element 210 is fixed, the drive rod 260 is further pushed to move towards the L-shaped plate 390, so that the locking teeth 730 of the expansion part 720 are re-embedded in the locking groove 810 of the L-shaped plate 390. At this time, the first spring 3100 is fully extended, and the circumferential positioning of the drive rod 260 is realized again, so as to avoid the support plate 240 from shifting due to the rotation of the lead screw 330 during the operation of the equipment, and ensure that the clamping state of the air filter element 210 is always stable.

[0048] When the exhaust fan 1120 is started, it generates negative pressure, causing outside air to enter the filter element mounting housing 110 evenly through multiple circumferential air inlets 111. As the air flows through the air filter 210, particulate matter, harmful gases, and other pollutants in the air are filtered and adsorbed by the air filter 210, achieving air purification. The purified air enters the fan mounting housing 130 through the exhaust port 1110, and then is discharged to the outside through the sealing plate exhaust port 1140 of the sealing plate 1130, completing one complete air purification cycle. After the rubber sealing ring 1150 on the bottom surface of the sealing plate 1130 is pressed, the inside of the fan mounting housing 130 is sealed, preventing the purified air from mixing with the unpurified air.

[0049] The slide rail 370 of the mounting bracket 250 cooperates with the slider 380 of the support block 310, strictly limiting the rotational freedom of the support block 310 and ensuring that the support block 310 can only move in the vertical direction. This ensures the horizontal lifting and lowering of the support plate 240 and prevents the air filter element 210 from having a filter gap due to the tilt of the support plate 240. The connecting sleeve 610 of the second bevel gear 360 is clearance-fitted with the bevel gear mounting through hole 510 of the mounting bracket 250, and axial limiting is achieved by the annular plate 620. This ensures that the second bevel gear 360 can only rotate around its own axis, avoiding axial displacement and ensuring precise meshing with the first bevel gear 350, thereby improving transmission efficiency and stability. The strip groove 710 of the drive rod 260 is clearance-fitted with the protrusion 640 of the second bevel gear, which not only enables the drive rod 260 to drive the second bevel gear 360, but also does not affect the axial movement of the drive rod 260, ensuring a smooth unlocking and fixing process.

[0050] The rubber pads 270 on the lower end face of the fan mounting housing 130 and the upper end face of the support plate 240 are elastic. When clamping the air filter element 210, they can not only buffer the clamping pressure and prevent the air filter element 210 from being damaged due to excessive pressure, but also fill the tiny gap between the air filter element 210 and the clamping surface, reducing the leakage of unfiltered air. After the rubber sealing ring 1150 between the sealing plate 1130 and the exhaust fan 1120 is pressed together, the inside of the fan mounting housing 130 is sealed, further ensuring the purification effect.

[0051] The two sets of mounting seats 3110 of the connecting mechanism are symmetrically arranged at the first shoulder 740 or the second shoulder 750, respectively, to ensure that the fixing force of the limiting plate 3130 on the filter element mounting housing 110 is evenly distributed; the second spring 940 is always in a pre-tight state, and can quickly pull the limiting plate 3130 to retract when the shoulder and the limiting plate 3130 are misaligned, ensuring convenient unlocking operation; the inclined surface 760 design of the shoulder allows the axial movement of the drive rod 260 to be smoothly converted into the radial movement of the limiting plate 3130, avoiding jamming.

[0052] The air purifier with easy filter replacement in this embodiment achieves the following beneficial effects through the above technical solution:

[0053] 1. The air purifier with easy filter replacement in this embodiment adopts a "plug-in" connection between the limiting plate 3130 and the limiting groove 420, which can easily replace the air filter 210. When replacing the air filter 210, there is no need to remove the screws when disassembling and installing the filter housing 110. Repeated operation will not cause problems such as housing deformation, loosening or damage of screw holes. The structural stability of the equipment is not affected by the number of replacements, and the service life of the equipment is significantly extended.

[0054] 2. In the air purifier with convenient filter replacement in this embodiment, the height of the support plate 240 can be infinitely adjusted by the setting of the lifting mechanism structure. When installing air filters 210 of different specifications, the support plate 240 can be pushed up by rotating the handwheel 140 until it cooperates with the fan mounting housing 130 to press the air filter 210 tightly (the handwheel 140 cannot be rotated). It can adapt to air filters 210 of different heights without replacing or modifying equipment parts, thus having better adaptability.

[0055] 3. In this embodiment, the air purifier with easy filter replacement only requires the inner diameter of the air filter 210 to be larger than the diameter of the exhaust port 1110 of the housing for installation. The interior of the filter housing 110 is an open fitting space, without restricting the outer diameter of the air filter 210 (as long as it can fit inside the filter housing 110). Users can choose air filters 210 with different outer diameters according to their purification needs (e.g., larger diameter filters can increase the filtration area and improve purification efficiency; smaller diameter filters can reduce wind resistance and save energy), or choose other diameter air filters 210 when it is not possible to obtain filters of the same diameter, without having to replace the entire air purifier, thus better improving the practicality and market adaptability of the equipment.

[0056] 4. In the air purifier with easy filter replacement in this embodiment, the rubber pads 270 on the lower end face of the fan mounting housing 130 and the upper end face of the support plate 240 have good elastic buffering performance, avoiding the compression damage to the air filter 210 caused by rigid clamping. This is especially suitable for air filters 210 made of easily damaged materials such as paper and fiber, effectively extending the service life of the air filter 210. At the same time, the elastic deformation of the rubber pads 270 can fill the tiny gaps between the air filter 210 and the clamping surface, further improving the sealing effect and realizing the dual functions of structural buffering and sealing.

[0057] In summary, the above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the present invention.

Claims

1. An air purifier with a convenient filter replacement element, characterized in that: The device includes a purifier body (100), which includes a filter element mounting housing (110). An air filter element (210) is provided in the filter element mounting housing (110). The filter element mounting housing (110) has multiple air inlets (111). A base (120) is provided at the lower end of the filter element mounting housing (110). A surrounding plate (220) extending into the filter element mounting housing (110) is provided at the base (120). A lifting mechanism mounting cavity (230) is formed between the surrounding plate (220) and the base (120). A lifting mechanism is provided in the lifting mechanism mounting cavity (230). The lifting mechanism includes a mechanism for adjusting the air filter element. (210) A support plate (240) is provided at the lower end. The support plate (240) can move along the height direction of the filter element mounting housing (110). The lifting mechanism mounting cavity (230) is also provided with a connecting mechanism for connecting the base (120) and the filter element mounting housing (110). The upper end of the filter element mounting housing (110) is provided with a fan mounting housing (130). The lower end face of the fan mounting housing (130) and the support plate (240) together clamp the air filter element (210). The fan mounting housing (130) is provided with an air extraction mechanism for extracting air from the filter element mounting housing (110).

2. An air purifier with a convenient filter replacement according to claim 1, characterized in that: The lifting mechanism includes a mounting bracket (250) disposed in the lifting mechanism mounting cavity (230), a support block (310) slidably disposed at the mounting bracket (250), a connecting rod (320) connected to the support plate (240) disposed at the support block (310), a lead screw (330) rotatably disposed at the mounting bracket (250) passing through the support block (310), a lead screw nut (340) cooperating with the lead screw (330) disposed at the support block (310), a first bevel gear (350) connected to the bottom end of the lead screw (330), a second bevel gear (360) rotatably disposed at the mounting bracket (250) cooperating with the first bevel gear (350), and a drive rod (260) rotatably disposed in the lifting mechanism mounting cavity (230) for driving the second bevel gear (360).

3. An air purifier with a convenient filter replacement according to claim 2, characterized in that: The mounting bracket (250) is provided with a slide rail (370) arranged along its height direction, and the support block (310) is provided with a slider (380) that cooperates with the slide rail (370).

4. An air purifier with a convenient filter replacement according to claim 2, characterized in that: One end of the drive rod (260) extends out of the enclosure plate (220). The filter element mounting housing (110) is provided with a housing groove (410) for the drive rod (260) to pass through the end of the drive rod (260) extending out of the enclosure plate (220). The end of the drive rod (260) passes through the housing groove (410). A handwheel (140) is provided at the end of the drive rod (260) passing through the housing groove (410).

5. An air purifier with a convenient filter replacement according to claim 2, characterized in that: The mounting bracket (250) is provided with a bevel gear mounting through hole (510), and the second bevel gear (360) is provided with a connecting sleeve (610) that is clearance-fitted with the bevel gear mounting through hole (510). The end of the connecting sleeve (610) extends out of the bevel gear mounting through hole (510), and the end of the connecting sleeve (610) extending out of the bevel gear mounting through hole (510) is provided with an annular plate (620) for limiting the rotation of the second bevel gear (360) in the bevel gear mounting through hole (510).

6. An air purifier with a convenient filter replacement according to claim 4, characterized in that: The second bevel gear (360) is provided with a second bevel gear through hole (630) through which the drive rod (260) passes. The middle part of the drive rod (260) is provided with a strip groove (710) arranged along its axial direction. The inner wall of the second bevel gear through hole (630) is provided with a protrusion (640) that extends into the strip groove (710) and is in clearance fit with the strip groove (710).

7. An air purifier with a convenient filter replacement according to claim 6, characterized in that: An L-shaped plate (390) is provided in the mounting cavity (230) of the lifting mechanism and at the other end near the drive rod (260). The L-shaped plate (390) is provided with multiple slots (810) at the end face of the drive rod (260). The multiple slots (810) are evenly distributed around the central axis of the drive rod (260). The end of the drive rod (260) near the L-shaped plate (390) expands outward to form an expansion portion (720). Multiple teeth (730) are provided at the expansion portion (720). The end of the drive rod (260) near the handwheel (140) expands outward to form a first shoulder (740). A first spring (3100) is sleeved on the drive rod (260) between the surrounding plate (220) and the first shoulder (740). The first spring (3100) is used to push the drive rod (260) to move so that the teeth (730) at the expansion portion (720) are abutted into the slots (810).

8. An air purifier with a convenient filter replacement according to claim 7, characterized in that: The end of the drive rod (260) near the L-shaped plate (390) expands outward to form a second shoulder (750). Inclined surfaces (760) are provided at the adjacent points of the first shoulder (740) and the drive rod (260), as well as at the adjacent points of the second shoulder (750) and the drive rod (260). There are two sets of connecting mechanisms, each set including two mounting seats (3110), which are symmetrically arranged on the first shoulder (390). At position 740) or at the second shoulder (750); a cover plate (3120) is provided at the mounting base (3110), and a strip-shaped through hole (910) is formed between the cover plate (3120) and the mounting base (3110). A limiting plate (3130) is slidably provided in the strip-shaped through hole (910). A surrounding plate through hole (1010) is provided at the end of the surrounding plate (220) corresponding to the limiting plate (3130). The filter element mounting housing (110) is corresponding to the surrounding plate through hole (1010). The end of the filter element housing (110) is provided with a limiting groove (420), and the first shoulder (740) and the second shoulder (750) are used to press the limiting plate (3130) so that the end of the limiting plate (3130) passes through the through hole (1010) of the surrounding plate and extends into the limiting groove (420) to fix the filter element housing (110); the mounting base (3110) is provided with a spring mounting cavity (920), and the bottom end face of the limiting plate (3130) is provided with a spring mounting cavity (920) for extending into the mounting base (3110). A spring mounting plate (930) is provided in the cavity (920), and a second spring (940) is provided between the spring mounting plate (930) and the inner wall of the spring mounting cavity (920). The second spring (940) is used to pull the end of the limiting plate (3130) out of the limiting groove (420) to release the fixation of the filter element mounting housing (110) when the first shoulder (740) and the second shoulder (750) are misaligned with the limiting plate (3130).

9. An air purifier with a convenient filter replacement according to claim 1, characterized in that: Rubber pads (270) are provided on the lower end face of the fan mounting housing (130) and the upper end face of the support plate (240).

10. An air purifier with a convenient filter replacement according to claim 1, characterized in that: The fan mounting housing (130) is provided with a housing exhaust port (1110) located at the upper end of the air filter element (210). The air extraction mechanism includes an extraction fan (1120) disposed in the fan mounting housing (130) and covering the housing exhaust port (1110). The upper end of the fan mounting housing (130) is provided with a sealing plate (1130) for sealing the fan mounting housing (130). The sealing plate (1130) is provided with a sealing plate exhaust port (1140). The bottom end face of the sealing plate (1130) is provided with a rubber sealing ring (1150) located between the extraction fan (1120) and the sealing plate (1130).

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