Air guide device and air purifier

Abstract

An air guide device includes an upper guide plate, a lower guide plate and a centrifugal fan, wherein the inner cavities of the upper guide plate and the lower guide plate form an exhaust cavity, wherein the impeller of the centrifugal fan is sleeved in the exhaust cavity, wherein the lower end of the lower guide plate forms an air inlet, wherein the side walls of the upper guide plate and the lower guide plate form an air outlet, wherein the upper guide plate and the lower guide plate are connected with guide vanes, wherein the guide vanes rotate and swing to change the air outlet direction. An air purifier is also disclosed, comprising a housing, an air filter, and the air guide device described above, wherein the air filtered by the air filter is discharged from the housing through the air guide device. The air guide device of the present invention has a 360° circular air outlet and a uniform air outlet, wherein the guide plate has a reasonable structure designed according to the flow conditions of the impeller outlet, thereby ensuring that the side air outlet blows upward along a certain angle, thereby increasing the air volume circulation radiation area of ​​the air purifier.

Description

Technical Field

[0001] The invention belongs to the field of air purifiers, and in particular relates to an air guide device and an air purifier. Background Art

[0002] The fans used in existing air purifiers are divided into centrifugal fans, axial fans, and fans, and their blowing range is limited; in addition, in order to filter smaller pollutants, the filter module must be denser, the resistance of the filter module is greater, and the requirements for the fan are more stringent, there must be enough air volume, and the blown air must have enough external residual pressure to penetrate the filter module. However, the difficulty that fans cannot overcome is that as the pressure increases, the noise will increase accordingly, and installing it in an air purifier will cause noise pollution, affecting the use of the purifier.

[0003] In the prior art, the air purifier has an air inlet and an air outlet, the centrifugal fan wheel is rotatably arranged in the volute, and the air inlet direction and the air outlet direction of the centrifugal fan are perpendicular to each other. Since the air outlet direction of the centrifugal fan is relatively single, it cannot meet the needs of users. Summary of the invention

[0004] The purpose of the present invention is to provide an air guide device and an air purifier, which change the air duct structure, thereby reducing noise and increasing air volume. To achieve the above purpose, the specific technical solutions of the air guide device and the air purifier of the present invention are as follows:

[0005] A wind guide device comprises an upper guide plate, a lower guide plate and a centrifugal fan, wherein the inner cavities of the upper guide plate and the lower guide plate form an exhaust chamber, and the impeller of the centrifugal fan is sleeved in the exhaust chamber. The device is characterized in that an air inlet is formed at the lower end of the lower guide plate, and an air outlet is formed on the side walls of the upper guide plate and the lower guide plate, and guide vanes are connected to the upper guide plate and the lower guide plate, and the guide vanes rotate and swing to change the air outlet direction.

[0006] Furthermore, the guide vane and the guide plate are connected in a movable manner or a fixed manner.

[0007] Furthermore, the upper guide plate and the lower guide plate have horizontal ends on the side close to the impeller and inclined ends on the side away from the impeller, and the upper guide plate and the lower guide plate extend from the horizontal end to the inclined end along a smooth arc.

[0008] Furthermore, the guide vane is a plate-shaped structure, the guide vane rotates around a side edge, and the guide vane rotates from a first guide vane position to a second guide vane position.

[0009] Furthermore, the included angle between the first position of the guide vane and the second position of the guide vane is greater than 0° and less than or equal to 180°.

[0010] Furthermore, the cross-section of the guide vane is in the shape of a square, an arc or an airfoil.

[0011] Furthermore, the upper guide plate and the lower guide plate are arranged coaxially, the maximum distance between the outer end point of the guide vane bottom edge away from the axis and the axis is greater than the impeller diameter, and the minimum distance between the inner end point of the guide vane bottom edge near the axis and the axis is 1 to 2 times the maximum distance between the outer end point of the guide vane bottom edge away from the axis and the axis.

[0012] Furthermore, at least one guide plate is arranged between the upper guide plate and the lower guide plate.

[0013] Furthermore, the guide vanes are evenly or unevenly distributed in the circumferential direction of the guide plate, and the adjacent angle between two adjacent guide vanes is 0° to 360°.

[0014] An air purifier comprises a shell, an air filter, and the above-mentioned air guide device, and the air filtered by the air filter is discharged from the shell through the air guide device.

[0015] The air purifier of the present invention has the following advantages:

[0016] 1. The traditional axial air inlet and axial air outlet are changed to axial air inlet and lateral air outlet, and the air outlet is 360° in a circle, the air outlet is uniform, and the guide plate is designed with a reasonable structure according to the flow conditions of the impeller outlet to ensure that the side air outlet blows upward at a certain angle, thereby increasing the air volume circulation radiation area of ​​the air purifier.

[0017] 2. The guide plate is designed according to the flow of the impeller outlet, so that the gas at the impeller outlet flows out at a certain angle. The design conforms to the flow theory and avoids forced changes in the direction of the fluid. It can effectively reduce noise and system resistance, thereby increasing the flow of the air purifier system.

[0018] 3. The guide vanes are designed according to the flow conditions. The position of the guide vanes can be rotated within a certain range, which has the effect of improving the fan efficiency and reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the air guide device of the present invention;

[0020] Figure 2 A longitudinal sectional view of the air guide device of the present invention;

[0021] Figure 3 is a cross-sectional view of the air guide device of the present invention;

[0022] Figure 4 It is a schematic diagram of the guide vane position structure of the present invention.

[0023] Description of the markings in the figure:

[0024] 1. Air guide device; 111. Upper guide plate; 112. Lower guide plate; 12. Guide vane; 121. Guide vane first position; 122. Guide vane second position; 13. Annular groove; 2. Centrifugal fan; 21. Casing; 22. Impeller; 3. Air inlet; 4. Air outlet; 5. Installation port; 6. Air filter bracket. DETAILED DESCRIPTION

[0025] In order to better understand the purpose, structure and function of the present invention, the following Figure 1-4 , an air purifier of the present invention is further described in detail.

[0026] The air purifier of the present invention comprises a housing and an air filter. The housing is provided with an air inlet and an air outlet 4, the air filter is arranged in the housing, and the housing comprises an air guide device 1 arranged at the air outlet 4. Air passes through the air inlet, enters the air filter to be purified, and then is discharged from the air outlet 4 through the air guide device 1.

[0027] like Figure 1 As shown, the air guide device 1 includes an upper guide plate 111, a lower guide plate 112, a centrifugal fan 2 and an air filter bracket 6. Figure 2 As shown, in order to meet the air inlet and outlet directions of the centrifugal fan 2, the guide plate adopts a wind path structure with circumferential air inlet and lateral air outlet. The inner cavity of the guide plate forms an exhaust cavity, and a mounting port 5 is formed at the upper end, and the mounting port 5 is connected to the exhaust cavity, so that the housing 21 of the centrifugal fan 2 is fixed to the upper end of the guide plate through a connecting bracket, and the impeller 22 of the centrifugal fan 2 is inserted from the mounting port 5 and sleeved in the exhaust cavity. An air inlet 3 is formed at the lower end of the guide plate, and a plurality of circles of air outlets 4 are formed on the side wall along the circumference of the array, and each air outlet 4 is arranged along the absolute speed direction of the exhaust gas of the impeller 22. In this way, through the rotation of the centrifugal fan 2, the air flowing out of the air filter enters the guide plate from the air inlet 3, and is discharged from the air outlet 4 by the centrifugal force after the rotation of the impeller 22 in the exhaust cavity.

[0028] In order to realize the structure of the air outlet 4, the air guide device 1 is a columnar bracket, including guide plates and guide vanes 12. The guide plates are arranged in layers, and the vertically arranged guide vanes 12 connect two adjacent layers of guide plates. The guide plates and guide vanes 12 surround the air outlet 4. Figure 2 As shown, in order to conform to the structure of the air outlet 4, each guide vane 12 is arranged along the absolute velocity direction of the gas discharged by the impeller 22, so that the opposite surfaces of adjacent guide vanes 12 serve as the left and right side walls of the air outlet 4. Each layer of guide plates gradually bulges upward from the inner edge, so that the two adjacent layers of guide plates, the outer wall of the upper guide plate and the inner wall of the lower guide plate, serve as the upper and lower side walls of the air outlet 4.

[0029] like Figure 3 and Figure 4As shown, the connection between the guide vane 12 and the two adjacent guide plates is a movable connection or a fixed connection. The upper guide plate 112 and the lower guide plate 112 are coaxially arranged, the guide vane 12 is a plate-like structure, the minimum distance between the inner end point of the bottom edge of the guide vane 12 near the center of the circle and the center of the circle is set to D2, and the maximum distance between the outer end point of the bottom edge of the guide vane 12 away from the center of the circle and the center of the circle is set to D1, and the maximum distance and the minimum distance are respectively distributed on the circle diameter, the maximum distance between the outer end point of the bottom edge of the guide vane 12 away from the center of the circle and the center of the circle is set to D1, which is greater than the diameter of the impeller 22, and the minimum distance between the inner end point of the bottom edge of the guide vane 12 near the center of the circle and the center of the circle is set to D2, which is 1 to 2 times the maximum distance D1 between the outer end point of the bottom edge of the guide vane 12 away from the center of the circle and the center of the circle.

[0030] When the connection between the guide vane 12 and the two adjacent guide plates is a movable connection, the guide vane 12 can rotate around the bottom edge end point, and the guide vane 12 can rotate from the guide vane first position 1 to the guide vane second position 2. The angle between the guide vane first position 121 and the guide vane second position 122 is greater than 0° and less than or equal to 180°.

[0031] Furthermore, the cross-section of the guide vane 12 may be in the shape of a square, an arc, or an airfoil, which is not particularly limited herein.

[0032] Preferably, the guide vanes 12 are distributed in the circumferential direction thereof. The guide vanes 12 may be evenly arranged at equal intervals or unevenly distributed, and the adjacent angles thereof are any angle between 0° and 360°.

[0033] In addition, to prevent the wind from blowing directly at the user, the deflector includes an inclined end and a horizontal end. The side of the deflector close to the impeller 22 is the horizontal end, and the side away from the impeller 22 is the inclined end. The plate extends from the horizontal end to the inclined end along a smooth arc. The angle between the inclined end and the horizontal plane is greater than 0° and less than or equal to 80°, thereby changing the wind direction to upward, improving the pleasantness of the wind feeling, and reducing wind loss in the process of changing the wind direction. In order to facilitate industrial manufacturing, the angle between the inclined end and the horizontal plane is generally 45°.

[0034] Furthermore, the cross-section of the flow guide may be in a square, circular or airfoil shape, which is not particularly limited herein.

[0035] Furthermore, guide plates are arranged at the upper and lower ends of the side wall of the air outlet 4, and at least one guide plate is arranged at equal intervals between the two guide plates.

[0036] Preferably, the number of guide plates arranged at the upper and lower ends of the side wall of the air outlet 4 is 0 to 8, so that the flow channel can be divided into 1 to 9 parts, and the shapes of the guide plates arranged at the upper and lower ends of the side wall of the air outlet 4 and the guide plates arranged in the middle can be guide plates of different shapes.

[0037] The inner wall of the lower guide plate 112 forms an annular groove 13 around the air inlet 3 at the air inlet 3, and the annular groove 13 is inserted into the lower edge of the housing 21 of the centrifugal fan 2 to ensure the air intake. The air filter bracket 6 is fixed to the air inlet 3 at the lower end of the lower guide plate by screws, and is used to fix the upstream air filter.

[0038] In this way, the 360° outflow in the circular direction can change the air outlet direction according to the direction of the impeller 22, the air volume is uniform, and the radiation area of ​​the outlet is greatly improved compared with the area of ​​the original air purifier structure, which can effectively increase the indoor air circulation speed.

[0039] It will be understood that the present invention is described through some embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention.

[0040] In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. An air guide device, comprising an upper guide plate (111), a lower guide plate (112) and a centrifugal fan (2), wherein the inner cavities of the upper guide plate (111) and the lower guide plate (112) form an exhaust cavity, and an impeller (22) of the centrifugal fan (2) is sleeved in the exhaust cavity, characterized in that: An air inlet (3) is formed at the lower end of the lower guide plate (112), and an air outlet (4) is formed on the side walls of the upper guide plate (111) and the lower guide plate (112). The upper guide plate (111) and the lower guide plate (112) are connected with guide vanes (12), and the guide vanes (12) rotate and swing to change the air outlet direction; the upper guide plate (111) and the lower guide plate (112) have horizontal ends on the sides close to the impeller (22) and have inclined ends on the sides away from the impeller (22); the upper guide plate (111) and the lower guide plate (112) extend from the horizontal end to the inclined end along a smooth arc; the upper guide plate (111) and the lower guide plate (112) are coaxially arranged, and the bottom edge of the guide vane (12) is away from the axis. The maximum distance between the outer end point of the guide vane (12) and the axis is greater than the diameter of the impeller (22); the maximum distance between the outer end point of the bottom edge of the guide vane (12) away from the axis and the axis is 1 to 2 times the minimum distance between the inner end point of the bottom edge of the guide vane (12) near the axis and the axis; at least one guide plate is arranged between the upper guide plate (111) and the lower guide plate (112); the guide vanes (12) are evenly or unevenly distributed in the circumferential direction of the guide plates, and the adjacent angle between two adjacent guide vanes (12) is 0° to 360°; the side of the guide plate close to the impeller (22) is a horizontal end, and the side away from the impeller (22) is an inclined end; the guide plate extends from the horizontal end to the inclined end along a smooth arc; the angle between the inclined end and the horizontal plane is greater than 0° and less than or equal to 80°.

2. The air guide device according to claim 1, characterized in that: The guide vane (12) is connected to the upper guide plate (111) and the lower guide plate (112) in a movable connection or a fixed connection.

3. The air guide device according to claim 2, characterized in that: The guide vane (12) is a plate-shaped structure. The guide vane (12) rotates around a side edge. The guide vane (12) rotates from a first guide vane position (121) to a second guide vane position (122).

4. The air guide device according to claim 3, characterized in that: The included angle between the guide vane first position (121) and the guide vane second position (122) is greater than 0° and less than or equal to 180°.

5. The air guide device according to claim 1, characterized in that: The cross-section of the guide vane (12) is in the shape of a square, an arc or an airfoil.

6. An air purifier, characterized in that: The invention comprises a shell, an air filter, and the air guide device according to any one of claims 1 to 5, wherein the air filtered by the air filter is discharged from the shell through the air guide device.

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