Improved air purifier

Abstract

The improved air purifier is characterized in that a lower air guide groove is formed in the upper portion of a lower shell, a lower air outlet is formed in the center of the lower air guide groove, an arc-shaped lower air guide face is arranged on the edge of the upper portion of the lower air guide groove, and the lower portion of a wind wheel is located in the lower air guide groove; an upper air outlet is formed in the periphery of the motor installation base in the circumferential direction, an upper air guiding protruding part protruding upwards is arranged on the upper portion of the motor installation base, a lower air guiding protruding part protruding downwards is arranged on the lower portion of the motor installation base, the lower air guiding protruding part is inserted into the wind wheel, and an arc-shaped first upper air guiding face is arranged on the outer edge of the upper portion of the upper air guiding protruding part. And an arc-shaped second upper air guide surface is arranged on the outer edge of the lower part of the lower air guide convex part. The wind wheel does not need to be covered with a protective cover, the number of parts is reduced, the structure is simplified, cost is reduced, air is guided through the lower air guiding face, the first upper air guiding face and the second upper air guiding face, air volume loss is reduced, and the air outlet volume and the air outlet speed are improved.

Description

Technical Field

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

[0002] An air purifier is used to filter particles in the air to purify the air. Desktop air purifiers are placed vertically on a desktop. The filter element is installed at the bottom of the air purifier. The inside of the filter element is hollow. The motor installed at the top of the purifier drives the wind wheel to rotate, so that the air in the surrounding environment is sucked into the bottom of the air purifier. The sucked air enters the filter element from the outside of the filter element, and after being filtered by the filter element, it is blown upward from the inside of the filter element. In order to fix the filter element and protect the wind wheel, a protective cover is usually installed between the filter element and the wind wheel for isolation. The protective cover is set on the wind wheel. The protective cover often has an opening in the middle so that air can flow out. In order to ensure the rotation of the wind wheel, there is a certain gap between the wind wheel and the protective cover. Air can easily enter the gap, but the air in the gap is not easy to blow upward, which leads to air loss and reduces the air volume blown out by the air purifier. In addition, the protective cover is often set independently, which is complicated to produce and maintain, and the cost is high, so it is necessary to improve it. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the utility model is to provide an improved air purifier to reduce air volume loss, improve purification efficiency, simplify structure and reduce costs.

[0004] In order to achieve the above-mentioned purpose, the technical scheme adopted by the utility model is: an improved air purifier, comprising an upper shell, a lower shell, a motor, a wind wheel and a motor mounting seat, the lower part of the upper shell is fixedly connected to the upper part of the lower shell, the upper shell is provided with a driving chamber inside, the lower shell is provided with a filter chamber inside, the filter chamber is provided with a filter element, the outer side of the lower shell is provided with a plurality of air inlets, the motor mounting seat is fixedly installed in the driving chamber, the motor is fixedly installed on the motor mounting seat and the output shaft of the motor is arranged downward, the wind wheel is fixedly installed on the output shaft of the motor, the upper part of the lower shell is provided with a lower air guide groove, the central part of the lower air guide groove is provided with a lower air outlet, the upper edge of the lower air guide groove is provided with an arc-shaped lower air guide surface, and the lower part of the wind wheel is located in the lower air guide groove;

[0005] An upper air outlet is provided on the periphery of the motor mounting seat in a circumferential direction, an upper air guide protrusion protruding upward is provided on the upper part of the motor mounting seat, a lower air guide protrusion protruding downward is provided on the lower part of the motor mounting seat, the lower air guide protrusion is inserted into the wind wheel, an upper outer edge of the upper air guide protrusion is provided with an arc-shaped first upper air guide surface, and a lower outer edge of the lower air guide protrusion is provided with an arc-shaped second upper air guide surface.

[0006] In a further technical solution, an annular upper convex ring protruding upward is provided on the outer edge of the lower air outlet, an annular rotating groove is formed between the annular upper convex ring and the lower air guide groove, and the lower edge of the wind wheel is inserted into the rotating groove;

[0007] The outer edge of the lower air outlet is provided with an annular lower convex ring protruding downwards, and the annular lower convex ring is abutted against the inner hole of the filter element.

[0008] In a further technical solution, a filter grille plate is provided at the lower air outlet.

[0009] In a further technical solution, a bottom shell is provided at the lower part of the lower shell, and a plurality of "L"-shaped connecting buckles are arranged at intervals along the circumferential direction on the bottom shell, and a plurality of "L"-shaped connecting grooves corresponding to each connecting buckle are arranged at intervals along the circumferential direction on the inner wall side of the lower shell, and each connecting buckle is connected to each connecting slot buckle.

[0010] In a further technical solution, the upper part of the bottom shell is provided with an upwardly protruding limiting protrusion, which cooperates with the inner hole of the lower part of the filter element, and the lower part of the bottom shell is provided with a downwardly opening holding groove, in which a holding protrusion is provided.

[0011] In a further technical solution, the air purifier is also provided with an air guide cover, which is snap-mounted on the upper part of the motor mounting base to form an upper air guide protrusion, and the first upper air guide surface is arranged on the outer edge of the air guide cover. A PCB board is fixedly installed on the center part of the upper air guide protrusion, and the PCB board is electrically connected to the motor.

[0012] In a further technical solution, an aromatherapy box is arranged between the air guide cover and the motor mounting seat, an upper aromatherapy groove extends outward from one side of the air guide cover, and a lower aromatherapy groove extends outward from one side of the corresponding motor mounting seat, the upper aromatherapy groove and the lower aromatherapy groove both pass through the upper air outlet, the upper aromatherapy groove and / or the lower aromatherapy groove are provided with a plurality of aromatherapy holes, the upper aromatherapy groove is buckled into the upper part of the lower aromatherapy groove to form an aromatherapy slide groove opening outward, the aromatherapy box is movably installed in the aromatherapy slide groove, a rebound switch is arranged inside the aromatherapy slide groove, the rebound switch is fixedly installed on the air guide cover or the motor mounting seat, a card block is arranged on the inner side of the aromatherapy box, and the card block cooperates with the rebound switch lock.

[0013] In a further technical solution, the air purifier is also provided with an air outlet mesh cover, which is fixedly installed on the upper part of the driving chamber, and a plurality of air outlets are arranged at intervals along the circumferential direction on the upper part of the air outlet mesh cover, and the lower part of the air outlet mesh cover is fixedly connected to the motor mounting seat, and the air guide cover is located between the air outlet mesh cover and the motor mounting seat, and the inner side surface of the air outlet mesh cover is provided with an arc-shaped third upper air guide surface.

[0014] In a further technical solution, the outer diameter of the upper end of the air outlet mesh cover is D1, the outer diameter of the lower end of the air outlet mesh cover is D2, and the ratio of D1 to D2 is 0.80 to 0.99.

[0015] In a further technical solution, a control platform is provided at the center of the air outlet grille, and a control screen or a plurality of control buttons are installed on the control platform, and the control screen and each control button are electrically connected to the PCB board respectively;

[0016] The motor mounting seat is also provided with a power socket, a power mounting box extends outward from one side of the motor mounting seat, the power socket is fixedly installed in the power mounting box, the power socket is electrically connected to the PCB board, and a box cover extends outward from one side of the air guide cover, and the box cover is arranged on the upper part of the power mounting box.

[0017] After adopting the above structure, the advantages of the utility model compared with the prior art are: the lower air outlet is opened at the upper part of the lower shell, and there is no need for a protective cover to cover the wind wheel, which reduces parts, simplifies the structure, and improves production efficiency; the air entering the gap between the wind wheel and the lower shell is guided upward by the arc-shaped lower air guide surface, reducing wind volume loss and increasing air volume and air speed; the lower part of the wind wheel is located in the lower air guide groove, which can reduce the noise of the wind wheel, improve operating stability, and reduce the height of the air purifier; when the air passes through the wind wheel and is blown upward, the air is guided to the upper air outlet through the second upper air guide surface, further reducing air volume loss; the air blown out from the upper air outlet is guided to the air outlet through the first upper air guide surface and the second upper air guide surface, further reducing air volume loss and increasing air volume and air speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 It is a cross-sectional view of the utility model;

[0021] Figure 3 The utility model Figure 2 A magnified view of part A;

[0022] Figure 4 The utility model Figure 2 A magnified view of part B;

[0023] Figure 5 It is an exploded view of the utility model;

[0024] Figure 6 The utility model Figure 5 Enlarged view of part C;

[0025] Figure 7 It is a structural schematic diagram of the lower shell of the utility model;

[0026] Figure 8It is a structural schematic diagram of the air guide cover of the utility model.

[0027] In the figure:

[0028] 1 upper shell, 11 driving chamber, 12 motor, 13 wind wheel;

[0029] 2 air guide cover, 21 upper air guide convex part, 22 first upper air guide surface, 23 PCB board, 24 upper aromatherapy slot, 241 aromatherapy hole, 25 box cover;

[0030] 3 motor mounting seat, 31 upper air outlet, 32 lower air guide convex portion, 33 second upper air guide surface, 34 lower aromatherapy slot, 35 rebound switch, 36 power supply mounting box, 37 power supply socket;

[0031] 4 aromatherapy boxes, 41 card blocks;

[0032] 5 air outlet grille, 51 air outlet, 52 third upper air guide surface, 53 control platform;

[0033] 6 lower shell, 61 filter chamber, 62 filter element, 63 air inlet, 64 lower air guide groove, 65 lower air outlet, 66 lower air guide surface, 671 annular upper convex ring, 672 rotating groove, 673 annular lower convex ring, 68 filter grille plate; 7 bottom shell, 71 connecting buckle, 72 limiting convex part, 73 holding groove. DETAILED DESCRIPTION

[0034] The following are only preferred embodiments of the present invention, and do not limit the protection scope of the present invention.

[0035] An improved air purifier, such as Figures 1 to 8 As shown, it includes an upper shell 1, a lower shell 6, a motor 12, a wind wheel 13 and a motor mounting seat 3. The lower part of the upper shell 1 is fixedly connected to the upper part of the lower shell 6. The upper shell 1 is provided with a driving chamber 11 inside, the lower shell 6 is provided with a filter chamber 61 inside, the filter chamber 61 is provided with a filter element 62, and the outer side of the lower shell 6 is provided with a plurality of air inlets 63. The motor mounting seat 3 is fixedly installed on the driving chamber 11, the motor 12 is fixedly installed on the motor mounting seat 3 and the output shaft of the motor 12 is arranged downwardly, the wind wheel 13 is fixedly installed on the output shaft of the motor 12, and the upper part of the lower shell 6 is provided with a lower air guide groove 64. The lower air guide groove 6 4 is provided with a lower air outlet 65 at the center thereof, an arc-shaped lower air guide surface 66 is provided at the upper edge of the lower air guide groove 64, and the lower part of the wind wheel 13 is located in the lower air guide groove 64; an upper air outlet 31 is provided at the periphery of the motor mounting seat 3 along the circumferential direction, an upper air guide convex portion 21 protruding upward is provided at the upper part of the motor mounting seat 3, a lower air guide convex portion 32 protruding downward is provided at the lower part of the motor mounting seat 3, the lower air guide convex portion 32 is inserted into the wind wheel 13, an arc-shaped first upper air guide surface 22 is provided at the upper outer edge of the upper air guide convex portion 21, and an arc-shaped second upper air guide surface 33 is provided at the lower outer edge of the lower air guide convex portion 32.

[0036] The conventional air purifier needs to be covered with an independent protective cover on the wind wheel 13, which has a complex structure, high cost and low production efficiency, and the protective cover will cause loss of air volume, resulting in small air volume and weak wind force. The lower air outlet 65 of the utility model is opened at the upper part of the lower shell 6, and there is no need to cover the wind wheel 13 with a protective cover, which reduces parts, simplifies the structure and improves production efficiency; the air entering the gap between the wind wheel 13 and the lower shell 6 is guided upward by the arc-shaped lower air guide surface 66, thereby reducing air volume loss and increasing air volume and air speed; the lower part of the wind wheel 13 is located in the lower air guide groove 64, which can reduce the noise of the wind wheel, improve operating stability and reduce the height of the air purifier; when the air passes through the wind wheel 13 and blows upward, the air is guided to the upper air outlet 31 through the second upper air guide surface 33, further reducing air volume loss; the air blown out from the upper air outlet 31 is guided to the blowing port 51 through the first upper air guide surface 22 and the second upper air guide surface 33, further reducing air volume loss and increasing air volume and air speed.

[0037] Specifically, the outer edge of the lower air outlet 65 is provided with an upwardly protruding annular upper convex ring 671, and an annular rotation groove 672 is formed between the annular upper convex ring 671 and the lower air guide groove 64, and the lower edge of the wind wheel 13 is inserted into the rotation groove 672; the outer edge of the lower air outlet 65 is provided with a downwardly protruding annular lower convex ring 673, and the annular lower convex ring 673 is abutted against the inner hole of the filter element 62. The lower edge of the wind wheel 13 inserted into the rotation groove 672 can reduce the gap between the lower shell 6 and reduce the air volume loss. Most of the air enters the wind wheel 13 upward from the lower air outlet 65, and then passes through the second upper air guide surface 33 to guide the air to the upper air outlet 31, while a small part of the air enters the rotation groove 672 from the lower air outlet 65, and then the lower air guide surface 66 guides the air to the upper air outlet 31 to avoid wind loss.

[0038] Specifically, Figure 8 As shown, the lower air outlet 65 is provided with a filtering grid plate 68. The filtering grid plate 68 filters large impurities and particulate foreign matter to prevent the foreign matter from being sucked into the wind wheel 13, thereby protecting the wind wheel 13 and the motor 12.

[0039] Specifically, Figure 5 As shown, a bottom shell 7 is provided at the lower part of the lower shell 6, and a plurality of "L"-shaped connecting buckles 71 are arranged at intervals along the circumferential direction on the bottom shell 7, and a plurality of "L"-shaped connecting slots corresponding to the connecting buckles 71 are arranged at intervals along the circumferential direction on the inner wall side of the lower shell 6, and each connecting buckle 71 is connected with each connecting slot by buckle. The bottom shell 7 is connected with the lower shell 6 by buckle through the connecting buckle 71 and the connecting slot, so that the bottom shell 7 can be easily disassembled and assembled, thereby replacing the filter element 62, and the convenience of replacing the filter element 62 is improved.

[0040] Specifically, Figure 2 and Figure 3 As shown, the upper part of the bottom shell 7 is provided with a limiting protrusion 72 protruding upward, and the limiting protrusion 72 is abutted against the inner hole of the lower part of the filter element 62. The lower part of the bottom shell 7 is provided with a gripping groove 73 with an opening facing downward, and a gripping protrusion is provided in the gripping groove 73. The upper part of the filter element 62 abuts against the upper wall of the filter chamber 61, the annular lower convex ring 673 is inserted into the upper part of the inner hole of the filter element 62, the outer side wall of the annular lower convex ring 673 abuts against the inner hole of the filter element 62, and the lower part of the filter element 62 abuts against the upper part of the bottom shell 7, the limiting protrusion 72 is inserted into the lower part of the inner hole of the filter element 62, and the outer side wall of the limiting protrusion 72 abuts against the inner hole of the filter element 62, thereby fixing the upper and lower parts of the filter element 62, and the filter element 62 is fixed more firmly, without any fixing parts, and it is convenient to replace the filter element 62. When opening the bottom shell 7, the bottom shell 7 can be rotated by holding the protrusion. The holding protrusion is hidden in the holding groove 73, does not take up space, and has high aesthetics. The holding groove 73 protrudes upward to form the limiting protrusion 72, which reduces the use of raw materials for the bottom shell 7, has a simple structure and low cost.

[0041] Specifically, Figure 5 and Figure 6 As shown, the air purifier is further provided with an air guide cover 2, which is snap-fitted to the upper part of the motor mounting seat 3 to form an upper air guide convex portion 21, a first upper air guide surface 22 is provided at the outer edge of the air guide cover 2, a PCB board 23 is fixedly installed at the center of the upper air guide convex portion 21, and the PCB board 23 is electrically connected to the motor 12. During production and maintenance, the motor 12 can be easily installed and maintained by disassembling the air guide cover 2.

[0042] Specifically, an aromatherapy box 4 is arranged between the air guide cover 2 and the motor mounting seat 3, an upper aromatherapy slot 24 is extended outward from one side of the air guide cover 2, and a lower aromatherapy slot 34 is extended outward from one side of the corresponding motor mounting seat 3, the upper aromatherapy slot 24 and the lower aromatherapy slot 34 both penetrate the upper air outlet 31, and a plurality of aromatherapy holes 241 are provided in the upper aromatherapy slot 24 and the lower aromatherapy slot 34, or a plurality of aromatherapy holes 241 are provided in the upper aromatherapy slot 24 or the lower aromatherapy slot 34, the upper aromatherapy slot 24 is buckled into the upper part of the lower aromatherapy slot 34 to form an aromatherapy slide slot opening outward, the aromatherapy box 4 is movably installed in the aromatherapy slide slot, a rebound switch 35 is arranged inside the aromatherapy slide slot, the rebound switch 35 is fixedly installed on the air guide cover 2 or the motor mounting seat 3, a clamping block 41 is arranged on the inner side of the aromatherapy box 4, and the clamping block 41 is locked with the rebound switch 35. The aromatherapy box 4 is fixed in the aromatherapy slide groove by the clamping block 41 and the rebound switch 35. The aromatherapy box 4 is pressed to unlock and lock the rebound switch 35, so that it is convenient to disassemble and assemble the aromatherapy box 4 to add aromatherapy materials. The structure is simple, the cost is low, and the aromatherapy materials are convenient to add. The aroma emitted by the aromatherapy material overflows from the aromatherapy hole 241 to the upper air outlet 31, and enters the ambient air along with the air flowing through the upper air outlet 31, thereby improving the functionality of the air purifier.

[0043] Specifically, the air purifier is further provided with an air outlet mesh cover 5, which is fixedly mounted on the upper part of the driving chamber 11, and a plurality of air blowing ports 51 are arranged at intervals along the circumferential direction on the upper part of the air outlet mesh cover 5, and the lower part of the air outlet mesh cover 5 is fixedly connected to the motor mounting seat 3, and the air guide cover 2 is located between the air outlet mesh cover 5 and the motor mounting seat 3, and an arc-shaped third upper air guide surface 52 is arranged on the inner side of the air outlet mesh cover 5. The air outlet mesh cover 5 prevents foreign matter from entering the interior of the air purifier, protects the motor 12 and the wind wheel 13, and after the air is blown out from the upper air outlet 31, the air is guided to the air blowing port 51 through the third upper air guide surface 52 and the second upper air guide surface 33, thereby reducing the air volume loss.

[0044] Specifically, Figure 8 As shown, the outer diameter of the upper end of the air outlet mesh cover 5 is D1, and the outer diameter of the lower end of the air outlet mesh cover 5 is D2, and the ratio of D1 to D2 is 0.80 to 0.99. D1 is smaller than D2, so that the third upper air guide surface 52 can be formed on the inner side of the air outlet mesh cover 5, so as to guide the air to the air outlet 51. However, when the ratio of D1 to D2 is small, the difference between D1 and D2 is large, and the slope of the third upper air guide surface 52 is reduced, which will cause the gap between the third upper air guide surface 52 and the second upper air guide surface 33 to decrease, and generate greater wind noise. When the ratio of D1 to D2 is large, the difference between D1 and D2 is small, the slope of the third upper air guide surface 52 increases, and the gap between the third upper air guide surface 52 and the second upper air guide surface 33 increases, resulting in a decrease in wind force. Therefore, the ratio of D1 to D2 needs to reach a balance point between wind force and wind noise, so as to increase wind force while reducing wind noise. Preferably, the ratio of D1 to D2 is 0.85-0.95.

[0045] Specifically, a control platform 53 is provided at the center of the air outlet mesh cover 5, and a control screen or multiple control buttons are installed on the control platform 53, and the control screen and each control button are electrically connected to the PCB board 23 respectively; the motor mounting seat 3 is also provided with a power socket 37, and a power mounting box 36 is extended outward from one side of the motor mounting seat 3, and the power socket 37 is fixedly installed in the power mounting box 36, and the power socket 37 is electrically connected to the PCB board 23, and a box cover 25 is extended outward from one side of the air guide cover 2, and the box cover 25 is covered on the upper part of the power mounting box 36. The control screen adopts a touch screen. The air purifier is controlled by operating the touch screen, and the working status of the air purifier is displayed through the touch screen. The operation method is simpler and more intuitive. The air purifier is controlled by a control button. An LED light is provided in the control button. The working status of the air purifier is displayed through the LED light. The structure is simple and the cost is low. The power socket 37 is arranged on the motor mounting seat 3. Production and maintenance can be carried out by disassembling and assembling the air guide cover 2, which improves production efficiency and reduces maintenance costs. The box cover 25 is arranged on the power mounting box 36, which can fix the power socket 37 and protect the power socket 37 at the same time. The structure is simple and the cost is low.

[0046] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. An improved air purifier, comprising an upper shell (1), a lower shell (6), a motor (12), a wind wheel (13) and a motor mounting seat (3), wherein the lower part of the upper shell (1) is fixedly connected to the upper part of the lower shell (6), a driving chamber (11) is arranged inside the upper shell (1), a filter chamber (61) is arranged inside the lower shell (6), a filter element (62) is arranged in the filter chamber (61), a plurality of air inlets (63) are arranged on the outer side surface of the lower shell (6), the motor mounting seat (3) is fixedly mounted on the driving chamber (11), the motor (12) is fixedly mounted on the motor mounting seat (3) and the output shaft of the motor (12) is arranged downward, and the wind wheel (13) is fixedly mounted on the output shaft of the motor (12), characterized in that: A lower air guide groove (64) is provided at the upper portion of the lower shell (6), a lower air outlet (65) is provided at the center of the lower air guide groove (64), an arc-shaped lower air guide surface (66) is provided at the upper edge of the lower air guide groove (64), and the lower portion of the wind wheel (13) is located in the lower air guide groove (64); An upper air outlet (31) is provided on the periphery of the motor mounting seat (3) along the circumferential direction; an upper air guide convex portion (21) protruding upward is provided on the upper portion of the motor mounting seat (3); a lower air guide convex portion (32) protruding downward is provided on the lower portion of the motor mounting seat (3); the lower air guide convex portion (32) is inserted into the wind wheel (13); an arc-shaped first upper air guide surface (22) is provided on the upper outer edge of the upper air guide convex portion (21); and an arc-shaped second upper air guide surface (33) is provided on the lower outer edge of the lower air guide convex portion (32).

2. An improved air purifier according to claim 1, characterized in that: The outer edge of the lower air outlet (65) is provided with an upwardly protruding annular upper convex ring (671), an annular rotating groove (672) is formed between the annular upper convex ring (671) and the lower air guide groove (64), and the lower edge of the wind wheel (13) is inserted into the rotating groove (672); The outer edge of the lower air outlet (65) is provided with an annular lower convex ring (673) protruding downward, and the annular lower convex ring (673) is abutted against the inner hole of the filter element (62).

3. An improved air purifier according to claim 2, characterized in that: The lower air outlet (65) is provided with a filtering grille plate (68).

4. An improved air purifier according to claim 2, characterized in that: A bottom shell (7) is provided at the lower part of the lower shell (6), and a plurality of "L"-shaped connecting buckles (71) are arranged at intervals along the circumferential direction on the bottom shell (7), and a plurality of "L"-shaped connecting slots corresponding to the connecting buckles (71) are arranged at intervals along the circumferential direction on the inner wall side of the lower shell (6), and each connecting buckle (71) is connected to each connecting slot by buckle.

5. An improved air purifier according to claim 4, characterized in that: The upper part of the bottom shell (7) is provided with a limiting convex portion (72) protruding upward, the limiting convex portion (72) abuts against the inner hole of the lower part of the filter element (62), and the lower part of the bottom shell (7) is provided with a gripping groove (73) with an opening facing downward, and a gripping convex portion is provided in the gripping groove (73).

6. An improved air purifier according to any one of claims 1 to 5, characterized in that: The air purifier is also provided with an air guide cover (2), the air guide cover (2) is snap-fitted to the upper part of the motor mounting seat (3) to form the upper air guide convex part (21), the first upper air guide surface (22) is arranged at the outer edge of the air guide cover (2), a PCB board (23) is fixedly mounted at the center of the upper air guide convex part (21), and the PCB board (23) is electrically connected to the motor (12).

7. An improved air purifier according to claim 6, characterized in that: An aromatherapy box (4) is arranged between the air guide cover (2) and the motor mounting seat (3); an upper aromatherapy slot (24) extends outwardly from one side of the air guide cover (2); and a lower aromatherapy slot (34) extends outwardly from one side of the corresponding motor mounting seat (3); the upper aromatherapy slot (24) and the lower aromatherapy slot (34) both penetrate the upper air outlet (31); and the upper aromatherapy slot (24) and / or the lower aromatherapy slot (34) are provided with a plurality of aromatherapy holes (2 The upper aromatherapy groove (24) is buckled on the upper part of the lower aromatherapy groove (34) to form an aromatherapy slide groove with an opening facing outwards. The aromatherapy box (4) is movably installed in the aromatherapy slide groove. A rebound switch (35) is arranged inside the aromatherapy slide groove. The rebound switch (35) is fixedly installed on the air guide cover (2) or the motor mounting seat (3). A clamping block (41) is arranged on the inner side of the aromatherapy box (4). The clamping block (41) is locked with the rebound switch (35).

8. An improved air purifier according to claim 6, characterized in that: The air purifier is also provided with an air outlet mesh cover (5), which is fixedly mounted on the upper part of the driving chamber (11), and the upper part of the air outlet mesh cover (5) is provided with a plurality of air outlets (51) spaced apart along the circumferential direction, the lower part of the air outlet mesh cover (5) is fixedly connected to the motor mounting seat (3), the air guide cover (2) is located between the air outlet mesh cover (5) and the motor mounting seat (3), and the inner side surface of the air outlet mesh cover (5) is provided with an arc-shaped third upper air guide surface (52).

9. An improved air purifier according to claim 8, characterized in that: The outer diameter of the upper end of the air outlet mesh cover (5) is D1, and the outer diameter of the lower end of the air outlet mesh cover (5) is D2. The ratio of D1 to D2 is 0.80 to 0.

99.

10. An improved air purifier according to claim 8, characterized in that: A control platform (53) is provided at the center of the air outlet grille (5), and a control screen or a plurality of control buttons are installed on the control platform (53), and the control screen and the control buttons are electrically connected to the PCB board (23) respectively; The motor mounting seat (3) is also provided with a power socket (37). A power mounting box (36) is extended outwardly from one side of the motor mounting seat (3). The power socket (37) is fixedly installed in the power mounting box (36). The power socket (37) is electrically connected to the PCB board (23). A box cover (25) is extended outwardly from one side of the air guide cover (2). The box cover (25) is arranged on the upper part of the power mounting box (36).

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