Air purifier

Abstract

The application relates to an air purifier, which realizes reliable air-tight sealing cooperation between a self-cleaning module and a shell by arranging a sealing piece between a protruding part of a self-cleaning module mounting frame and the shell, and assisting with positioning grooves, protruding edges and multiple positioning structures, effectively prevents bypass leakage of air not filtered by an annular filter screen from a cooperation gap, ensures that all air flows entering an air duct are preliminarily purified by the self-cleaning module, and effectively improves the overall purification efficiency of the air purifier, protects a rear-end purification module and prolongs the service life of the rear-end purification module.

Description

Technical Field

[0001] This application relates to the field of air purification technology, and in particular to an air purifier. Background Technology

[0002] Air purifiers, as devices that effectively improve indoor air quality, can remove particulate matter, harmful gases, and odors from the air and are widely used in modern homes and offices. To enhance user experience and reduce maintenance frequency, some air purifiers are equipped with a self-cleaning module. This module is usually installed at the air inlet and is used to initially filter the incoming air, intercepting adhering particles such as pet hair and lint. An automatic cleaning mechanism then removes and collects these particles from the filter, thereby extending the lifespan of the downstream HEPA / activated carbon filter.

[0003] However, when self-cleaning modules are installed in existing air purifiers, there is often a gap between the self-cleaning module and the air purifier's casing. When the air purifier is running, the fan generates negative pressure, guiding airflow from the air inlet. Raw air that has not been filtered by the self-cleaning module may pass through these gaps and directly enter the fan or the rear filter, resulting in a decrease in filtration efficiency. Utility Model Content

[0004] To address the aforementioned issues, this application provides an air purifier that effectively prevents airflow bypass leakage.

[0005] To achieve the above objectives, the air purifier designed in this application includes:

[0006] The housing has an air inlet, an air outlet, and an air duct. The air inlet and the air outlet are respectively connected to the air duct. The air duct is equipped with a fan that directs airflow from the air inlet to the air outlet.

[0007] A self-cleaning module and a purification module are arranged sequentially in the air duct along the airflow direction. The self-cleaning module includes a mounting bracket at the air inlet and an annular filter screen rotatably fitted on the mounting bracket. The mounting bracket has protrusions on the left and right sides that extend relative to the annular filter screen.

[0008] A sealing element is provided between the protrusion and the housing to form a sealed fit between the self-cleaning module and the housing.

[0009] Preferably, the sealing element is a sponge pad, which is bonded and fixed to the protrusion or the housing.

[0010] Preferably, the back of the protrusion is provided with a positioning groove, and the seal is bonded and fixed in the positioning groove; the housing is provided with a sealing plane that is in close contact with the seal at the position corresponding to the seal, and the housing is provided with a protruding ridge extending along the length direction of the positioning groove on the sealing plane.

[0011] Preferably, a positioning structure is provided between the mounting bracket and the housing, the positioning structure being used to ensure that the seal is in close contact with the sealing surface of the housing when the self-cleaning module is installed in the air duct.

[0012] Preferably, the positioning structure includes:

[0013] The mounting bracket has a pin at the bottom and a buckle at the rear top of the mounting bracket.

[0014] An elastic clamping piece is provided on the housing corresponding to the buckle position, and a socket corresponding to the pin position;

[0015] The pins are adapted to be inserted into the socket, and the buckle is adapted to be inserted into the elastic clamping piece, so that the self-cleaning module can be detachably connected to the housing.

[0016] Preferably, the positioning structure further includes a V-shaped positioning protrusion, which is located near the bottom of the mounting bracket; the housing is provided with a V-shaped positioning groove corresponding to the position of the V-shaped positioning protrusion, and the V-shaped positioning protrusion cooperates with the V-shaped positioning groove.

[0017] Preferably, the housing has a raised rib extending along the width direction of the annular filter at a position near the upper end of the air inlet. The raised rib is in close contact with the rear side of the annular filter, and the length of the raised rib is greater than or equal to the length of the annular filter.

[0018] Preferably, the rib and the housing are integrally formed, and multiple reinforcing ribs are provided between the rib and the housing.

[0019] Preferably, the end face of the rib that contacts the annular filter screen is an arc surface.

[0020] Preferably, the self-cleaning module further includes a drive mechanism, and an active roller and a driven roller rotatably disposed at the upper and lower ends of the mounting frame, respectively. The active roller and the driven roller are rotatably mounted on the upper and lower edges of the mounting frame, respectively. The annular filter screen is fitted onto the active roller and the driven roller, and the drive mechanism is connected to the active roller in a transmission manner.

[0021] The air purifier designed in this application achieves a reliable airtight seal between the self-cleaning module and the housing by setting a seal between the protrusion of the self-cleaning module mounting bracket and the housing, supplemented by positioning grooves, protrusions, and multiple positioning structures. This effectively prevents unfiltered air from bypassing and leaking through the gaps in the fit, ensuring that all airflow entering the air duct undergoes preliminary purification by the self-cleaning module. This effectively improves the overall purification efficiency of the air purifier, protects the downstream purification module, and extends its service life. Attached Figure Description

[0022] Figure 1 This is an exploded view of the air purifier provided in the embodiments of this application.

[0023] Figure 2 This is a schematic diagram of the planar structure of the air purifier provided in the embodiments of this application.

[0024] Figure 3 yes Figure 2 Sectional view at point AA.

[0025] Figure 4 yes Figure 2 Sectional view at point BB.

[0026] Figure 5 yes Figure 4 Enlarged diagram of point C in the middle.

[0027] Figure 6 This is an exploded perspective view of the self-cleaning module provided in the embodiments of this application.

[0028] The components include: housing 10, air inlet 11, air outlet 12, air duct 13, fan 14, sealing plane 15, protruding rib 151, elastic clamping piece 16, insertion port 17, V-shaped positioning groove 18, protruding rib 19, reinforcing rib 191, self-cleaning module 20, mounting bracket 21, annular filter screen 22, protruding part 23, positioning groove 231, holding part 232, drive mechanism 24, active roller 25, driven roller 26, transition roller 27, purification module 30, sealing element 40, positioning structure 50, pin 51, snap fastener 52, V-shaped positioning protrusion 53, and door cover 60. Detailed Implementation

[0029] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0030] like Figure 1 As shown, the air purifier described in this embodiment mainly includes a housing 10, a self-cleaning module 20, a purification module 30, a sealing element 40, and a positioning structure 50.

[0031] like Figures 1 to 3 As shown, the housing 10 is the main structure of the air purifier, with an air inlet 11 for introducing outside air and an air outlet 12 for discharging purified air. The air inlet 11 and the air outlet 12 are interconnected through an internal air duct 13. Inside the air duct 13, a fan 14 is also provided, which generates driving force to ensure that the airflow flows stably in a predetermined direction from the air inlet 11 to the air outlet 12. Specifically, in this embodiment, the front of the housing 10 can be designed as an open form to form a larger air inlet 11, while the air outlet 12 can be located at the top, rear, or side of the housing 10 to adapt to different product shapes and air outlet requirements.

[0032] Inside the air duct 13, the self-cleaning module 20 and the purification module 30 are arranged sequentially along the airflow direction. When the fan 14 is working, outside air is drawn in through the air inlet 11, first undergoing preliminary filtration through the self-cleaning module 20 at the front end, then flowing through the purification module 30 for deep purification, and finally the clean air is delivered to the indoor environment from the exhaust vent 12 of the air duct 13. This layout allows the self-cleaning module 20 to act as the first physical barrier for air entering the purification system, effectively intercepting pollutants such as pet hair and lint; while the downstream purification module 30 can use, for example, a combination of high-resistance HEPA and activated carbon composite filters for deeper air purification.

[0033] The self-cleaning module 20 includes a mounting bracket 21 located at the air inlet 11 and an annular filter 22 rotatably mounted on the mounting bracket 21. In this embodiment, the mounting bracket 21 not only serves as the structural foundation of the self-cleaning module 20, supporting and positioning the annular filter 22, but also connects to a drive assembly that drives the annular filter 22 to rotate. The specific structure of the annular filter 22 and its driving method will be described in further detail in subsequent embodiments.

[0034] The mounting bracket 21 has protrusions 23 extending from the annular filter 22 on both sides. Specifically, the protrusions 23 can be end shells detachably mounted on the left and right sides of the mounting bracket 21 to form part of the mounting bracket 21. Seals 40 are disposed between the protrusions 23 and the housing 10, forming a sealed fit between the self-cleaning module 20 and the housing 10. Specifically, when the self-cleaning module 20 is installed in the predetermined position on the housing 10, these seals 40 are compressed or tightly fitted, thereby forming an effective sealed fit between the periphery of the self-cleaning module 20 and the housing 10. This prevents or greatly reduces the leakage of unfiltered air through the potential gaps between the self-cleaning module 20 and the housing 10 directly into the downstream of the air duct 13, thereby extending the service life of the purification module 30 downstream of the air duct 13. In this embodiment, the self-cleaning module 20 is arranged vertically, that is, the annular filter 22 is in a vertical state, or it is arranged at a slight angle to the vertical direction, such as the angle with the vertical direction is set in the range of 0.5 degrees to 3 degrees.

[0035] As a specific and preferred embodiment of the seal 40, such as Figure 4 , Figure 5 As shown, the sealing element 40 is a sponge pad, which can be bonded and fixed to the contact surface of the protrusion 23 facing the housing 10 by adhesives such as double-sided tape or liquid glue, or conversely fixed to the inner wall of the housing 10 at a position corresponding to the protrusion 23, so as to achieve a reliable sealing effect.

[0036] In some embodiments, such as Figure 5 As shown, a positioning groove 231 is provided on the back of the protrusion 23, and the seal 40 is bonded and fixed in the positioning groove 231. In this embodiment, the positioning groove 231 is integrally formed on the surface of the protrusion 23 facing the inner wall of the housing 10, and the seal 40 is fixed inside the positioning groove 231 by adhesive. This not only provides positioning for the installation of the seal 40, but also prevents the seal 40 from lateral displacement or falling off during assembly or long-term use. It also ensures that the deformation direction of the seal 40 is guided when it is compressed, thereby forming a more uniform and effective seal.

[0037] In addition, such as Figure 5 As shown, the housing 10 has a sealing plane 15 at the position corresponding to the seal 40, which is in close contact with the seal 40. The housing 10 has a protruding ridge 151 extending along the length direction of the positioning groove 231 on the sealing plane 15. The protrusion height of the ridge 151 can slightly press into the seal 40 in the positioning groove 231, thereby generating greater local compressive stress on the contact surface of the ridge 151, further improving the sealing performance of this area.

[0038] In some embodiments, such as Figure 1 , Figure 6As shown, a positioning structure 50 is provided between the mounting bracket 21 and the housing 10. The positioning structure 50 is used to ensure that the sealing element 40 and the sealing plane 15 of the housing 10 are tightly attached when the self-cleaning module 20 is installed in the air duct 13.

[0039] In some embodiments, such as Figure 1 , Figure 6 As shown, the positioning structure 50 includes a pin 51 at the bottom of the mounting bracket 21, a buckle 52 at the rear of the top of the mounting bracket 21, and an elastic clamping piece 16 on the housing 10 corresponding to the position of the buckle 52, as well as a socket 17 corresponding to the position of the pin 51. The pin 51 is adapted to be inserted into the socket 17, and the buckle 52 is adapted to be inserted into the elastic clamping piece 16, so that the self-cleaning module 20 can be detachably connected to the housing 10.

[0040] Specifically, the pins 51 and the latches 52 are both located on the protrusions 23 on the left and right sides of the mounting bracket 21. The pins 51 can be a piece structure integrally formed on the protrusions 23, or a pin or column that is manufactured separately and fixed on the mounting bracket 21, so as to be inserted into the corresponding sockets 17 on the housing 10 when the self-cleaning module 20 is installed, and play a role in initial positioning and support; while the latches 52 are located on the rear side of the top of the mounting bracket 21 near the inner wall of the housing 10. They can be integrally formed on the protrusions 23 and have a certain elasticity or a specific engaging shape, such as a tongue with barbs, for use with the elastic clamping piece 16 on the housing 10. When assembling the self-cleaning module 20, the user first aligns the pin 51 at the bottom of the mounting bracket 21 with and inserts it into the socket 17 on the housing 10 to achieve initial positioning of the lower part of the module. Then, the user pushes the upper part of the mounting bracket 21 upward or inward so that the buckle 52 on the rear side of the top contacts and pushes open the elastic clamping piece 16. When the buckle 52 passes the specific locking point of the elastic clamping piece 16, the elastic clamping piece 16 rebounds and firmly clamps or locks the buckle 52 in it.

[0041] In this embodiment, as Figure 1 As shown, a door cover 60 is provided on the front side of the housing 10. The door cover 60 can cover most of the self-cleaning module 20 from the front. At the same time, the left and right sides of the door cover 60 are spaced apart from the housing 10, and air inlets, i.e., air inlets 11, are formed on the left and right sides of the door cover 60. In this embodiment, the door cover 60 itself is designed as a detachable or openable structure, for example, it can be installed by a snap-fit ​​connection, or one end of the door cover 60 can be rotatably connected to the housing 10, and the door cover 60 and the housing 10 can be detachably connected.

[0042] In some embodiments, such as Figure 1 , Figure 6As shown, the positioning structure 50 also includes a V-shaped positioning protrusion 53, which is located near the bottom of the mounting bracket 21. The housing 10 has a V-shaped positioning groove 18 corresponding to the position of the V-shaped positioning protrusion 53, and the V-shaped positioning protrusion 53 engages with the V-shaped positioning groove 18. Similarly, the V-shaped positioning protrusion 53 can be a protrusion or rib integrally formed on the protrusion 23 and having a specific V-shaped profile, with the tip of the "V" or the guiding slope facing the insertion direction. During the installation of the self-cleaning module 20, when the user pushes the bottom of the mounting bracket 21 into the housing 10, due to the guiding effect of the V-shaped slope, even if there is a certain initial alignment error, the V-shaped positioning protrusion 53 will be automatically guided by the inclined wall of the V-shaped positioning groove 18 and gradually slide into the center position of the groove bottom, reducing installation difficulties that may be caused by misalignment.

[0043] In some embodiments, such as Figure 1 , Figure 3 As shown, the housing 10 has a raised rib 19 extending along the width direction of the annular filter 22 near the upper end of the air inlet 11. The raised rib 19 is in close contact with the rear side of the annular filter 22, and the length of the raised rib 19 is greater than or equal to the length of the annular filter 22. In this way, during the cyclic rotation of the annular filter 22, especially when the filter material is soft or the tension is insufficient, the raised rib 19 can play a certain guiding and supporting role in the upper running trajectory of the annular filter 22, preventing the filter from undergoing excessive deformation, shaking, or deviating from the predetermined path, and helping to maintain the flatness and operational stability of the annular filter 22.

[0044] In some embodiments, such as Figure 1 As shown, the rib 19 and the housing 10 are an integral structure, and multiple reinforcing ribs 191 are provided between the rib 19 and the housing 10. The setting of the reinforcing ribs 191 increases the cross-sectional area of ​​the connection area of ​​the rib 19, effectively improving the ability of the rib 19 to resist deformation such as bending and torsion.

[0045] In this embodiment, the end face of the rib 19 that contacts the annular filter 22 is an arc surface. That is, the end face of the rib 19 that contacts the annular filter 22 is not a sharp edge or a flat surface, but is processed or molded into a smooth arc shape to avoid sharp edges scratching or abrading the surface of the annular filter 22.

[0046] In some embodiments, such as Figure 6As shown, the self-cleaning module 20 also includes a drive mechanism 24, and an active roller 25 and a driven roller 26 rotatably mounted at the upper and lower ends of the mounting frame 21, respectively. The active roller 25 and the driven roller 26 are rotatably mounted on the upper and lower edges of the mounting frame 21, respectively. An annular filter screen 22 is fitted onto the active roller 25 and the driven roller 26, forming a closed loop path. In this embodiment, the annular filter screen 22 can be made of a flexible material with good air permeability, sufficient mechanical strength, and easy cleaning, such as nylon mesh of a specific mesh size or durable plastic mesh fabric, etc. Its overall shape can be designed as follows: Figure 6 The annular structure, resembling a flat runway, forms an arc-shaped segment around the drive roller 25 and driven roller 26, while a straight segment with relatively parallel front and rear sides forms between the two rollers. The drive mechanism 24 can be a motor that drives the drive roller 25 to rotate at a preset speed via a gear transmission assembly or a synchronous belt transmission assembly. This causes the annular filter screen 22 to rotate continuously and cyclically on the mounting frame 21, ensuring that the filter screen surface can receive airflow evenly. Self-cleaning is achieved by scraping off adhering substances from the filter screen surface using scrapers positioned along the circulation path of the annular filter screen 22.

[0047] In this embodiment, as Figure 1 As shown, the protruding portions 23 on the left and right sides of the mounting bracket 21 are provided with handles 232 suitable for manual lifting. At the same time, a recessed groove is provided on the housing 10 corresponding to the position of the handles 232. When the self-cleaning module 20 is installed in place on the housing 10, the handles 232 are accommodated in the recesses, so that the self-cleaning module 20 can be easily disassembled for necessary maintenance by lifting the handles 232.

[0048] In some embodiments, such as Figure 1 , Figure 6 As shown, the self-cleaning module 20 also includes a transition roller 27. The inner side of one end of the annular filter 22 is sandwiched between the drive roller 25 and the transition roller 27. The drive mechanism 24 is connected to the transition roller 27 to drive the transition roller 27 to rotate. The transition roller 27 meshes with the drive roller 25 through gears to rotate under the drive of the transition roller 27. The rotation direction of the transition roller 27 is opposite to that of the drive roller 25. The inner side of the annular filter 22 is sandwiched between the drive roller 25 and the transition roller 27, which effectively avoids the slippage phenomenon that may occur in the annular filter 22 under high load or humid environment, and ensures the continuous and reliable operation of the self-cleaning function.

[0049] The air purifier designed in this application achieves a reliable airtight seal between the self-cleaning module and the housing by setting a seal between the protrusion of the self-cleaning module mounting bracket and the housing, supplemented by positioning grooves, protrusions, and multiple positioning structures. This effectively prevents unfiltered air from bypassing and leaking through the gaps in the fit, ensuring that all airflow entering the air duct undergoes preliminary purification by the self-cleaning module. This effectively improves the overall purification efficiency of the air purifier, protects the downstream purification module, and extends its service life.

[0050] In the description of this application, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0051] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0052] Finally, it should be noted that the above descriptions are merely preferred embodiments of this application and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An air cleaner characterized by comprising: include: The housing has an air inlet, an air outlet, and an air duct. The air inlet and the air outlet are respectively connected to the air duct. The air duct is equipped with a fan that directs airflow from the air inlet to the air outlet. A self-cleaning module and a purification module are arranged sequentially in the air duct along the airflow direction. The self-cleaning module includes a mounting bracket at the air inlet and an annular filter screen rotatably fitted on the mounting bracket. The mounting bracket has protrusions on the left and right sides that extend relative to the annular filter screen. A sealing element is provided between the protrusion and the housing to form a sealed fit between the self-cleaning module and the housing.

2. The air purifier according to claim 1, characterized in that, The sealing element is a sponge pad, which is bonded and fixed to the protrusion or the housing.

3. The air purifier according to claim 2, characterized in that, The back of the protrusion is provided with a positioning groove, and the sealing element is bonded and fixed in the positioning groove; the housing is provided with a sealing plane that is in close contact with the sealing element at the position corresponding to the sealing element, and the housing is provided with a protruding ridge extending along the length direction of the positioning groove on the sealing plane.

4. The air purifier according to claim 3, characterized in that, A positioning structure is provided between the mounting bracket and the housing. The positioning structure is used to ensure that the seal is in close contact with the sealing surface of the housing when the self-cleaning module is installed in the air duct.

5. The air purifier according to claim 4, characterized in that, The positioning structure includes: The mounting bracket has a pin at the bottom and a buckle at the rear top of the mounting bracket. An elastic clamping piece is provided on the housing corresponding to the buckle position, and a socket corresponding to the pin position; The pins are adapted to be inserted into the socket, and the buckle is adapted to be inserted into the elastic clamping piece, so that the self-cleaning module can be detachably connected to the housing.

6. The air purifier according to claim 5, characterized in that, The positioning structure also includes a V-shaped positioning protrusion, which is located near the bottom of the mounting bracket; the housing is provided with a V-shaped positioning groove corresponding to the position of the V-shaped positioning protrusion, and the V-shaped positioning protrusion cooperates with the V-shaped positioning groove.

7. The air purifier according to claim 1, characterized in that, The housing has a raised rib extending along the width direction of the annular filter screen at the upper end near the air inlet. The raised rib is in close contact with the rear side of the annular filter screen, and the length of the raised rib is greater than or equal to the length of the annular filter screen.

8. The air purifier according to claim 7, characterized in that, The rib is integral with the housing, and multiple reinforcing ribs are provided between the rib and the housing.

9. The air purifier according to claim 7, characterized in that, The end face of the rib that contacts the annular filter screen is an arc surface.

10. The air purifier according to any one of claims 1-9, characterized in that, The self-cleaning module also includes a drive mechanism, and an active roller and a driven roller that are rotatably disposed at the upper and lower ends of the mounting frame, respectively. The active roller and the driven roller are rotatably mounted on the upper and lower edges of the mounting frame, respectively. The annular filter screen is fitted on the active roller and the driven roller, and the drive mechanism is connected to the active roller in a transmission manner.

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