Air purifier

Abstract

The air purifier comprises a shell and an adjusting assembly, the shell comprises an outer shell and an installation seat, an installation hole is formed in the outer shell, the installation seat is locked to the outer shell through a screw joint piece, the adjusting assembly comprises a connecting support and a rotary knob assembly, the connecting support is installed on the installation seat, and the rotary knob assembly is installed on the installation seat. The knob assembly penetrates through the mounting hole and protrudes out of the outer surface of the shell, and the edge of the mounting hole protrudes outwards. According to the technical scheme, the cleanliness in the air purifier is improved, and the service life of the air purifier is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of air purification, in particular to an air purifier. Background Art

[0002] The installation method of the knob on the existing air purifier is generally to open a mounting hole on the shell of the air purifier, and then install the knob at the mounting hole. Since the knob needs to be rotated, a certain rotation gap is required between the knob and the mounting hole, so that water, dust or other debris can enter the air purifier through the rotation gap. On the one hand, the inside of the air purifier is not easy to clean. On the other hand, there are other electronic devices such as circuit boards inside the air purifier, which will affect the electronic devices in the air purifier, thereby reducing the cleanliness and service life of the air purifier. Utility Model Content

[0003] The main purpose of the utility model is to provide an air purifier, aiming to improve the cleanliness and service life of the interior of the air purifier.

[0004] To achieve the above-mentioned purpose, the air purifier proposed by the utility model comprises:

[0005] A housing, the housing comprising an outer shell and a mounting seat, the outer shell is provided with a mounting hole, and the mounting seat is locked to the outer shell by a screw connection; and

[0006] The adjustment component includes a connecting bracket and a knob component. The connecting bracket is installed on the mounting seat. The knob component passes through the mounting hole and protrudes from the outer surface of the shell, and the edge of the mounting hole is bulged outward.

[0007] Optionally, the adjustment component further includes a display screen and a main circuit board, the main circuit board is electrically connected to the display screen, and the display screen is mounted on the connecting bracket.

[0008] Optionally, an inner wall surface of the shell is provided with an integrally formed first connecting column, and the mounting seat is connected to the first connecting column via a screw connection.

[0009] Optionally, the adjustment assembly includes a main circuit board, the mounting base includes a mounting plate, a second connecting column is arranged between the mounting plate and the main circuit board, the second connecting column is coaxially arranged with the first connecting column, the main circuit board is located between the first connecting column and the second connecting column, the screw connection passes through the mounting plate, the second connecting column, and the main circuit board to be connected to the first connecting column, and the nut of the screw connection abuts against the mounting plate.

[0010] Optionally, the knob assembly also includes a transmission member and an encoder, the encoder includes a fixed seat located in the inner ring and a rotating sleeve located in the outer ring, the encoder is electrically connected to the main circuit board, the knob ring is connected to the rotating sleeve through the transmission member, the connecting bracket is connected to the fixed seat, the main circuit board is provided with an avoidance hole, the connecting bracket is fixed to the mounting plate, the transmission member includes a first sleeve, a connecting ring and a second sleeve, the first sleeve passes through the avoidance hole, the first sleeve is sleeved on the rotating sleeve, the inner edge of the connecting ring is connected to the first sleeve, the outer edge of the connecting ring is connected to the second sleeve, the second sleeve is connected to the knob ring, and the outer edge diameter of the connecting ring is larger than the diameter of the avoidance hole.

[0011] Optionally, the first sleeve is gap-matched with the avoidance hole, a gap is formed between the connecting ring and the main circuit board, and a gap is formed between the first sleeve and the mounting plate.

[0012] Optionally, the distance between the first sleeve and the inner edge of the avoidance hole is between 2 mm and 5 mm, and the gap between the connecting ring and the main circuit board is between 2 mm and 5 mm.

[0013] Optionally, the second sleeve includes a guide section and a mounting section connected to the guide section, the guide section is connected to the outer edge of the connecting ring, the diameter of the guide section is gradually reduced in the direction from the avoidance hole toward the mounting plate, and the knob ring is connected to the mounting section.

[0014] Optionally, the mounting seat further includes an annular plate, one end of which is connected to the main circuit board, and the other end of which abuts against a hole wall at the mounting hole.

[0015] Optionally, a third connecting column is connected to the outer peripheral surface of the annular plate, and the third connecting column is connected to the main circuit board via a screw connection.

[0016] Optionally, an annular abutment groove is provided on the outer peripheral surface of the annular plate, and the edge of the mounting hole overlaps the abutment groove.

[0017] Optionally, the mounting base further includes an annular guide plate, the outer edge of which is connected to an end of the annular plate away from the main circuit board, and the annular guide plate is tilted downward along the outer edge toward the inner edge.

[0018] Optionally, the mounting base further includes an annular receiving member, which is connected to the inner edge of the annular guide plate, and has an annular receiving groove with an opening facing away from the main circuit board, and the knob ring is located above the annular receiving groove.

[0019] Optionally, the adjustment assembly is arranged above the shell.

[0020] Optionally, the regulating component is used to adjust the air volume and wind speed.

[0021] Optionally, the air purifier also includes an air duct assembly and two filter brackets, the air duct assembly includes an air duct shell and a fan installed in the air duct shell, the fan is electrically connected to the main circuit board, the air duct shell is provided with air inlets on opposite sides, and the front side of the air duct shell is provided with an air outlet; the two filter brackets are respectively installed at the two air inlets, each filter bracket is provided with a filter slot, the filter slot is used to install a filter element, the shell is installed on the two filter brackets, and is sleeved on the two filter brackets.

[0022] The air purifier in the technical solution of the utility model includes a shell, a main circuit board and an adjustment component. The shell includes a housing and a mounting seat. The housing is provided with a mounting hole. The mounting seat is locked to the housing by a screw connection. The main circuit board is installed on the housing. The adjustment component includes a connecting bracket and a knob component. The connecting bracket is installed on the mounting seat. The knob component passes through the mounting hole and protrudes from the outer surface of the housing. In this way, it is convenient for the user to manually turn the knob component. Further, by setting the edge of the mounting hole to bulge outward, on the one hand, the upward bulge increases the structural strength of the edge of the mounting hole; on the other hand, the bulging mounting hole wall makes water or other dirt slide out of the mounting hole, thereby reducing water or other dirt from entering the air purifier through the mounting hole, thereby reducing the cleaning workload of the air purifier, and reducing the impact of water or dirt entering the air purifier on the internal circuit components of the air purifier, thereby improving the cleanliness and service life of the air purifier. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 This is a schematic structural diagram of an embodiment of an air purifier of the utility model;

[0025] Figure 2 It is a cross-sectional view of an embodiment of the air purifier of the utility model;

[0026] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0027] Figure 4 for Figure 1 A schematic diagram of the structure after the middle mounting seat and the adjustment component are assembled;

[0028] Figure 5 for Figure 4 A cross-sectional view from one perspective;

[0029] Figure 6 for Figure 1 Structural diagram of the main circuit board and the mounting plate;

[0030] Figure 7 for Figure 6 Exploded diagram of

[0031] Figure 8 for Figure 1 Schematic diagram of the structure of the middle ring plate and the ring receiving member.

[0032] Description of Figure Numbers:

[0033] Label name Label name 11 shell 21 Attach the bracket 111 Mounting holes 22 Display 112 First connecting column 23 Knob assembly 2 Adjustment components 231 Knob ring 12 Mounting Seat 232 Encoder 121 Main circuit board 2321 Fixed seat 1211 Avoidance hole 2322 Rotating sleeve 122 Mounting Plate 233 Transmission parts 123 Ring plate 2331 First casing 1231 Abutment groove 2332 Connecting ring 1232 The third connecting column 2333 Second sleeve 124 Ring guide plate 233a Guide section 125 Ring receiving piece 233b Installation section 126 Second connecting column

[0034] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, "and / or" in the full text includes three solutions. Taking A and / or B as an example, it includes technical solution A, technical solution B, and technical solution that satisfies both A and B; in addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0039] Reference Figures 1 to 3 The utility model provides an air purifier, comprising:

[0040] A housing, the housing comprising an outer shell and a mounting seat, the outer shell is provided with a mounting hole, and the mounting seat is locked to the outer shell by a screw connection; and

[0041] The adjustment component includes a connecting bracket and a knob component. The connecting bracket is installed on the mounting seat. The knob component passes through the mounting hole and protrudes from the outer surface of the shell, and the edge of the mounting hole is bulged outward.

[0042] The air purifier in the technical solution of the utility model includes a shell, a main circuit board and an adjustment component. The shell includes a housing and a mounting seat. The housing is provided with a mounting hole. The mounting seat is locked to the housing by a screw connection. The main circuit board is installed on the housing. The adjustment component includes a connecting bracket and a knob component. The connecting bracket is installed on the mounting seat. The knob component passes through the mounting hole and protrudes from the outer surface of the housing. In this way, it is convenient for the user to manually turn the knob component. Further, by setting the edge of the mounting hole to bulge outward, on the one hand, the upward bulge increases the structural strength of the edge of the mounting hole; on the other hand, the bulging mounting hole wall makes water or other dirt slide out of the mounting hole, thereby reducing water or other dirt from entering the air purifier through the mounting hole, thereby reducing the cleaning workload of the air purifier, and reducing the impact of water or dirt entering the air purifier on the internal circuit components of the air purifier, thereby improving the cleanliness and service life of the air purifier.

[0043] In this embodiment, the adjustment component also includes a display screen 22 and a main circuit board. The main circuit board is electrically connected to the display screen 22. The display screen 22 is installed on the connecting bracket 21, and the display screen 22 is exposed, so that the user can observe the adjusted air outlet parameters in real time through the display screen 22 while rotating the knob assembly 23, thereby improving the user experience.

[0044] Specifically, the inner wall surface of the housing 11 is provided with an integrally formed first connecting column 112, and the mounting seat 12 is connected to the first connecting column 112 via a screw connection. By providing the first connecting column 112, it is prevented that the screw is directly locked and installed with the housing 11, and it is prevented that the screw passes through the protruding surface of the housing 11. At the same time, the first connecting column 112 and the housing 11 are integrally formed, thereby increasing the connection strength between the first connecting column 112 and the housing 11, thereby improving the stability of the adjustment assembly 2.

[0045] Reference Figure 3 and Figure 7 Further, the adjustment assembly includes a main circuit board 121, the mounting seat 12 includes a mounting plate 122, a second connecting column 126 is arranged between the mounting plate 122 and the main circuit board 121, the second connecting column 126 is coaxially arranged with the first connecting column 112, the main circuit board 121 is located between the first connecting column 112 and the second connecting column 126, the screw member passes through the mounting plate 122, the second connecting column 126, and the main circuit board 121 to be connected with the first connecting column 112, and the nut of the screw member abuts against the mounting plate 122. The first connecting column 112 and the second connecting column 126 are coaxially arranged, so that the second connecting column 126 can not only play the role of connecting the main circuit board 121 and the mounting plate 122, but also can make the main circuit board 121 and the mounting plate 122 both fixed to the first connecting column 112.

[0046] Furthermore, the first connecting column 112 is arranged on the inner side of the outer shell 11, the main circuit board 121 and the mounting plate 122 are also installed on the inner side of the outer shell 11, the connecting bracket 21 is partially located on the inner side of the outer shell 11, and the knob ring 231 and the touch display lens 222 are located on the outer side of the outer shell 11, thereby reducing the protrusion of the connecting structure from the mounting hole 111, and only part of the knob assembly 23 needs to be extended, thereby improving the overall aesthetic effect of the air purifier and further improving the user experience.

[0047] In this embodiment, the knob assembly 23 further includes a knob ring 231, a transmission member 233 and an encoder 232. The encoder 232 includes a fixed seat 2321 located in the inner ring and a rotating sleeve 2322 located in the outer ring. The encoder 232 is electrically connected to the main circuit board. The knob ring 231 is connected to the rotating sleeve 2322 through the transmission member 233. The connecting bracket 21 is connected to the fixed seat 2321. The main circuit board 121 is provided with an avoidance hole 1211. The connecting bracket 21 is fixed to the mounting plate 122. The transmission member 233 includes a first sleeve 2331, a connecting ring 2332 and a second sleeve 2333. The first sleeve 2331 passes through the avoidance hole 1211. The first sleeve 2331 is sleeved on the rotating sleeve 2322. The inner edge of the connecting ring 2332 is connected to the first sleeve 2331. The outer edge of the connecting ring 2332 is connected to the second sleeve 2333. The second sleeve 2333 is connected to the knob ring 231. The outer edge diameter of the connecting ring 2332 is larger than the diameter of the avoidance hole 1211.

[0048] When the adjustment component 2 is installed, the connecting bracket 21, the knob ring 231 and the transmission member 233 are rotationally connected through the encoder 232. The mounting plate 122 serves to connect and fix the connecting bracket 21. When the adjustment component 2 is subjected to a large force, the connecting member will be pressed to move downward, so that the outer peripheral surface of the connecting ring 2332 abuts against the hole wall of the avoidance hole 1211, so that the main circuit board 121 and the mounting plate 122 jointly support the adjustment component 2, thereby increasing the stability of the adjustment component 2, and then when the user rotates the knob ring 231, it will not shake, thereby reducing the adjustment deviation, thereby improving the user experience and the adjustment accuracy of the adjustment component 2.

[0049] Optionally, the first sleeve 2331 is clearance-matched with the avoidance hole 1211, a clearance is formed between the connecting ring 2332 and the main circuit board 121, and a clearance is formed between the first sleeve 2331 and the mounting plate 122. By clearance-matching the first sleeve 2331 and the avoidance hole 1211, it is convenient to insert the transmission member 233 into the avoidance hole 1211, so as to facilitate the installation and removal of the adjustment component 2; it is understandable that when the user rotates the knob ring 231, there may be a downward movement in some cases, and it is impossible to apply force completely in the rotation direction of the knob ring 231. If the connecting ring 2332 is allowed to abut against the main circuit board 121, the user needs to overcome the friction between the connecting ring 2332 and the hole wall of the avoidance hole 1211 when rotating the knob ring 231, which makes it inconvenient for the user to rotate the knob ring 231. Therefore, by forming a gap between the first sleeve 2331 and the mounting plate 122, when the user rotates the knob ring 231, even if the user applies a certain downward pressure on the knob ring 231, there is still a certain gap between the connecting ring 2332 and the main circuit board 121, thereby facilitating the rotation of the knob ring 231.

[0050] Specifically, the spacing between the first sleeve 2331 and the inner edge of the avoidance hole 1211 is between 2 mm and 5 mm, and the spacing between the connecting ring 2332 and the main circuit board 121 is between 2 mm and 5 mm. By reasonably setting the spacing, it is convenient for the user to turn the knob ring 231, thereby improving the connection strength of the adjustment component 2, thereby improving the user experience and the service life of the adjustment component 2.

[0051] The second sleeve 2333 includes a guide section 233a and a mounting section 233b connected to the guide section 233a, the guide section 233a is connected to the outer edge of the connecting ring 2332, the diameter of the guide section 233a is gradually reduced in the direction from the avoidance hole 1211 to the mounting plate 122, and the knob ring 231 is connected to the mounting section 233b. The guide section 233a is provided to facilitate the insertion of the transmission member 233 into the mounting hole 111.

[0052] Reference Figures 3 to 8Optionally, the mounting seat 12 further includes an annular plate 123 , one end of the annular plate 123 is connected to the main circuit board 121 , and the other end of the annular plate 123 abuts against the hole wall at the mounting hole 111 . Since the first connecting column 112 is provided on the inner side of the shell 11, there is a certain gap between the mounting plate 122 and the inner surface of the shell 11, and the first sleeve 2331 should be slightly smaller than the mounting hole 111, that is, there must be a certain gap between the adjustment component 2 and the mounting hole 111. Therefore, by providing the annular plate 123 and making the annular plate 123 abut against the hole wall at the mounting hole 111, it is possible to prevent dust falling from the mounting hole 111 from entering the interior of the air purifier. The interior of the air purifier involves many mounting structures and electronic components. If dust falls in, it may affect the performance of the air purifier. Therefore, the dust falling from the mounting hole 111 is blocked in the annular plate 123 by the annular plate 123, thereby reducing the dust entering the interior of the air purifier. When cleaning is required, only the shell 11 and the mounting seat 12 need to be cleaned, thereby improving the stability of the air purifier and improving the user experience.

[0053] Furthermore, the annular plate may also be a lighting component, which can serve as a reminder to the user when the light is dim, reminding the user of the exact position of the button, while also increasing the lighting effect and improving the user experience.

[0054] Furthermore, the outer circumference of the annular plate 123 is connected with a third connecting column 1232, and the third connecting column 1232 is connected to the main circuit board 121 through a screw connection. Therefore, by providing the third connecting column 1232, the annular plate 123 and the main circuit board 121 are fixedly connected, and the structural strength of the annular plate 123 is strengthened, thereby increasing the anti-bending ability of the annular plate 123.

[0055] Specifically, the outer peripheral surface of the annular plate 123 is provided with an annular abutment groove 1231, and the edge of the mounting hole 111 overlaps the abutment groove 1231. The annular abutment groove 1231 serves to connect the edge of the mounting hole 111 and the annular plate 123, and on the other hand, reduces the gap between the annular plate 123 and the hole wall of the mounting hole 111, thereby reducing the entry of impurities such as dust, thereby improving the cleanliness of the air purifier.

[0056] Furthermore, the mounting seat 12 further includes an annular guide plate 124, the outer edge of which is connected to one end of the annular plate 123 away from the main circuit board 121, and the annular guide plate 124 is tilted downwardly from the outer edge toward the inner edge. In order to facilitate the precise installation of the adjustment component 2, the mounting hole 111 cannot be set too small, because it is not convenient to install the adjustment component 2 if it is too small. Therefore, an annular guide plate 124 is set, and the adjustment component 2 can be smoothly connected through the annular guide plate 124, thereby facilitating the precise alignment and installation of the connecting bracket 21 and the mounting plate 122, thereby improving the installation efficiency of the adjustment component 2. Furthermore, the annular guide plate 124 can also be a lighting component, or a lighting component is installed inside the annular guide plate 124, so as to provide a lighting prompt for the adjustment component, such as displaying a red light when the air purifier detects that the air quality is poor, and displaying a green light when the air quality is good, etc., so that the user can feel the air quality more intuitively through the prompt of the lighting component. Of course, the knob can also display different colors for winds of different wind speeds during the adjustment process.

[0057] Optionally, the mounting base 12 further includes an annular receiving piece 125, which is connected to the inner edge of the annular guide plate 124, and the annular receiving piece 125 has an annular receiving groove with an opening facing away from the main circuit board 121, and the knob ring 231 is located above the annular receiving groove.

[0058] Although the annular guide plate 124 facilitates the guiding installation of the adjustment component 2 and the precise alignment installation of the connecting bracket 21 and the mounting plate 122, it also has a disadvantage, that is, water or dirt on the user's hands or dirt on the edge of the mounting hole 111 can slide smoothly through the annular guide plate 124 into the interior of the air purifier, thereby causing certain damage to the interior of the air purifier.

[0059] Therefore, by providing the annular receiving piece 125, water or dirt that falls smoothly from the annular guide plate 124 can fall into the annular receiving piece 125, thereby reducing the amount of dirt that falls into the interior of the air purifier. When the user needs to clean the air purifier, he only needs to clean the annular receiving piece, thereby improving the cleanliness of the air purifier, reducing damage to the interior of the air purifier, and increasing the service life of the air purifier.

[0060] In one embodiment, the adjustment component 2 is arranged above the housing. Since the air purifier of this product is small in size, it is generally not set up in a very high place. Therefore, by arranging the adjustment component 2 above the housing, it is convenient for the user to adjust it, and it is also convenient for the user to observe the display screen and obtain the latest air output parameters by looking at the display screen. Of course, the adjustment component 2 can also be arranged in front of or on the side of the air purifier according to the needs of the user.

[0061] Optionally, the regulating component 2 is used to adjust the air volume and wind speed. The air outlet parameters may be humidity, the opening size of the aromatherapy at the air outlet, etc., that is, the regulating component 2 can also be used to adjust humidity, the opening size of the aromatherapy at the air outlet, etc.

[0062] Optionally, the air purifier also includes an air duct assembly and two filter brackets, the air duct assembly includes an air duct shell and a fan installed in the air duct shell, the fan is electrically connected to the main circuit board, the air duct shell is provided with air inlets on opposite sides, and the front side of the air duct shell is provided with an air outlet; the two filter brackets are respectively installed at the two air inlets, each filter bracket is provided with a filter slot, the filter slot is used to install a filter element, the shell is installed on the two filter brackets, and is sleeved on the two filter brackets.

[0063] The fan in the present application is a centrifugal fan, which takes in air through the two sides of the air duct shell and exhausts air from the front. An aromatherapy is installed at the air outlet to increase the fragrance or refreshing effect of the air outlet and enhance the user experience. At the same time, a filter element is installed in the filter slot of the filter bracket at the air inlet on both sides. The filter element is used to filter the air entering the air inlet to reduce impurities contained in the air blown out from the air outlet, thereby further enhancing the user experience.

[0064] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An air purifier, characterized in that: include: A housing, the housing comprising an outer shell (11) and a mounting seat (12), the outer shell (11) being provided with a mounting hole (111), the mounting seat (12) being locked to the outer shell (11) via a screw connection; and The adjustment assembly comprises a connecting bracket (21) and a knob assembly (23), wherein the connecting bracket (21) is mounted on the mounting seat (12), the knob assembly (23) passes through the mounting hole (111) and protrudes from the outer surface of the housing (11), and the edge of the mounting hole (111) is arranged to bulge outwards.

2. The air purifier according to claim 1, characterized in that: The adjustment component also includes a display screen (22) and a main circuit board, the main circuit board is electrically connected to the display screen (22), and the display screen (22) is mounted on the connecting bracket (21).

3. The air purifier according to claim 1, characterized in that: An inner wall surface of the outer shell (11) is provided with an integrally formed first connecting column (112), and the mounting seat (12) is connected to the first connecting column (112) via a screw connection.

4. The air purifier according to claim 3, characterized in that: The adjustment component includes a main circuit board (121), and the mounting seat (12) includes a mounting plate (122). A second connecting column (126) is arranged between the mounting plate (122) and the main circuit board (121), and the second connecting column (126) is coaxially arranged with the first connecting column (112). The main circuit board (121) is located between the first connecting column (112) and the second connecting column (126). The screw connection passes through the mounting plate (122), the second connecting column (126), and the main circuit board (121) to be connected to the first connecting column (112), and the nut of the screw connection abuts against the mounting plate (122).

5. The air purifier according to claim 4, characterized in that: The knob assembly (23) further comprises a knob ring (231), a transmission member (233) and an encoder (232); the encoder (232) comprises a fixed seat (2321) located in an inner ring and a rotating sleeve (2322) located in an outer ring; the encoder (232) is electrically connected to the main circuit board; the knob ring (231) is connected to the rotating sleeve (2322) via the transmission member (233); the connecting bracket (21) is connected to the fixed seat (2321); the main circuit board (121) is provided with an avoidance hole (1211); the connecting bracket (21) is fixed to the mounting plate (122); The transmission member (233) comprises a first sleeve (2331), a connecting ring (2332) and a second sleeve (2333), wherein the first sleeve (2331) passes through the avoidance hole (1211), the first sleeve (2331) is sleeved on the rotating sleeve (2322), the inner edge of the connecting ring (2332) is connected to the first sleeve (2331), the outer edge of the connecting ring (2332) is connected to the second sleeve (2333), the second sleeve (2333) is connected to the knob ring (231), and the outer edge diameter of the connecting ring (2332) is greater than the diameter of the avoidance hole (1211).

6. The air purifier according to claim 5, characterized in that: The first sleeve (2331) is clearance-matched with the avoidance hole (1211), a gap is formed between the connecting ring (2332) and the main circuit board (121), and a gap is formed between the first sleeve (2331) and the mounting plate (122).

7. The air purifier according to claim 6, characterized in that: The distance between the first sleeve (2331) and the inner edge of the avoidance hole (1211) is between 2 mm and 5 mm, and the gap between the connecting ring (2332) and the main circuit board (121) is between 2 mm and 5 mm.

8. The air purifier according to claim 6, characterized in that: The second sleeve (2333) comprises a guide section (233a) and a mounting section (233b) connected to the guide section (233a); the guide section (233a) is connected to the outer edge of the connecting ring (2332); the diameter of the guide section (233a) is gradually reduced in the direction from the avoidance hole (1211) toward the mounting plate (122); and the knob ring (231) is connected to the mounting section (233b).

9. The air purifier according to claim 5, characterized in that: The mounting seat (12) further comprises an annular plate (123), one end of the annular plate (123) being connected to the main circuit board (121), and the other end of the annular plate (123) being in contact with the hole wall at the mounting hole (111).

10. The air purifier according to claim 9, characterized in that: The outer peripheral surface of the annular plate (123) is connected to a third connecting column (1232), and the third connecting column (1232) is connected to the main circuit board (121) via a screw connection.

11. The air purifier according to claim 10, characterized in that: An annular abutment groove (1231) is provided on the outer peripheral surface of the annular plate (123), and the edge of the mounting hole (111) overlaps the abutment groove (1231).

12. The air purifier according to claim 9, characterized in that: The mounting seat (12) further comprises an annular guide plate (124), the outer edge of which is connected to an end of the annular plate (123) away from the main circuit board (121), and the annular guide plate (124) is arranged to be tilted downward from the outer edge toward the inner edge.

13. The air purifier according to claim 12, characterized in that: The mounting seat (12) further comprises an annular receiving member (125), the annular receiving member (125) being connected to the inner edge of the annular guide plate (124), the annular receiving member (125) having an annular receiving groove with an opening facing away from the main circuit board (121), and the knob ring (231) being located above the annular receiving groove.

14. The air purifier according to claim 1, characterized in that: The adjustment component (2) is arranged above the shell.

15. The air purifier according to claim 1, characterized in that: The regulating component (2) is used to regulate the air volume and wind speed.

16. The air purifier according to claim 1, characterized in that: The air purifier also includes an air duct assembly and two filter brackets. The air duct assembly includes an air duct shell and a fan installed in the air duct shell. The air duct shell is provided with air inlets on two opposite sides, and an air outlet is provided on the front side of the air duct shell. The two filter brackets are respectively installed at the two air inlets. Each filter bracket is provided with a filter slot for installing a filter element. The shell is installed on the two filter brackets and is sleeved on the two filter brackets.

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