Flow channel structure and air purification device

Abstract

The present invention belongs to the field of air purification technology, and specifically relates to a flow channel structure and an air purification device, wherein a flow channel structure is used for a fan, comprising: a base for being installed on the fan; a base shell, which is sleeved on the base and the outside of the fan, an air inlet being provided at one end of the base shell, the air inlet being provided close to the bottom end of the fan, a concentrated depression extending toward the interior of the base shell being provided on the base shell, and at least part of the concentrated depression being located outside the bottom end of the fan. The flow channel structure and the air purification device of the present invention are provided with a concentrated depression so that the gas coming in from the air inlet is guided by the concentrated depression and concentrated toward the fan when passing through the bottom end of the fan, thereby improving the efficiency of the fan and facilitating improving the efficiency of the air intake and air outlet of the device.

Description

Technical Field

[0001] The present invention belongs to the technical field of air purification, and in particular relates to a flow channel structure and an air purification device. Background Art

[0002] An air purifier is a product that can adsorb, decompose or transform various air pollutants and effectively improve air cleanliness.

[0003] Currently, home air purifiers typically utilize dry, multi-layer filtration and adsorption methods (such as electrostatic adsorption, activated carbon adsorption, and HEPA filtration) to purify the air. While these air purifiers are operating, pollutants accumulate directly on the filter screen. Long-term accumulation can clog the filter pores, affecting air filtration effectiveness. Furthermore, dust accumulated on the filter screen can become a breeding ground for bacteria, causing secondary pollution. This is why water-washable air purifiers have emerged.

[0004] Existing water-washing air purification devices include a water tank, a water-washing assembly, and a fan. The water-washing assembly rotates within the water tank to form a water curtain. An air inlet is provided on the sidewall of the water tank. Dust-laden air from the outside world enters the water tank through the air inlet under the action of the fan and is fully contacted with the water curtain, thereby being purified. However, as the air flows through the fan, the fan's guidance force is weak, resulting in low air intake and exhaust efficiency. Summary of the Invention

[0005] In order to solve the above-mentioned problems in the prior art, that is, to solve the problem that the fan of the existing water-washing air purification device has weak guiding force on the gas, resulting in low air intake and air outlet efficiency of the device, the present invention provides a flow channel structure and an air purification device, wherein a flow channel structure is used for the fan, comprising: a base for installing the fan; a base shell, which is sleeved on the outside of the base and the fan, an air inlet is provided at one end of the base shell, and the air inlet is arranged near the air inlet end of the fan, and a concentrated depression extending toward the interior of the base shell is provided on the base shell, and at least part of the concentrated depression is sleeved on the outside of the air inlet end of the fan.

[0006] In a preferred technical solution of the above flow channel structure, the cross-sectional radius of the base shell located at both ends of the concentrated recess is larger than the cross-sectional radius of the concentrated recess.

[0007] In a preferred technical solution of the above-mentioned flow channel structure, a reinforcement member is provided between two opposite side walls of the concentrated recess.

[0008] In a preferred technical solution of the above-mentioned flow channel structure, the reinforcement is connected to the bottom surface of the concentrated recess and extends toward the outside of the base shell.

[0009] In the preferred technical solution of the above-mentioned flow channel structure, an air inlet grille is provided on the air inlet, and the air inlet grille includes: a circumferential rib arranged in an annular shape, with at least two circumferential ribs provided, and the plurality of circumferential ribs are arranged concentrically; and radial ribs arranged along the radial direction of the circumferential ribs and uniformly distributed around the circumference of the circumferential ribs, with at least two radial ribs provided between two adjacent circumferential ribs.

[0010] In the preferred technical solution of the above-mentioned flow channel structure, a first guide protrusion is connected to the base shell, the first guide protrusion is located below the fan, and the first guide protrusion is bent toward the inside of the fan; or, from the outer periphery of the base shell to the axis of the base shell, the concentrated recess gradually bends upward at one end close to the air inlet.

[0011] In the preferred technical solution of the above-mentioned flow channel structure, the base includes a bottom wall and a side wall, the fan is connected to the bottom wall of the base, the side wall of the base is connected to at least a portion of the outer periphery of the bottom wall of the base, and the side wall of the base extends in a direction away from the fan.

[0012] In a preferred technical solution of the above flow channel structure, a fixing plate is provided between the base shell and the side wall of the base, and two sides of the fixing plate are respectively connected to the side wall of the base and the base shell.

[0013] In the preferred technical solution of the above-mentioned flow channel structure, the concentrated recess includes a first end and a second end, the second end of the concentrated recess is arranged away from the air inlet, at least part of the fixing plate is connected to the second end of the concentrated recess, and the concentrated recess is used to support the fixing plate; and / or, the second end of the concentrated recess is connected to an air guide protrusion, and the air guide protrusion extends in a direction away from the air inlet.

[0014] An air purification device includes a water tank, a water washing component and a fan, and also includes a flow channel structure as described in any of the above items, the flow channel structure includes a base and a base shell, the fan is located in the base shell, and the fan is installed on the base.

[0015] It will be understood by those skilled in the art that the flow channel structure and the air purification device of the present invention, by providing a concentrated recess, allow the gas entering from the air inlet to be guided by the concentrated recess and concentrated toward the fan when passing through the bottom end of the fan, thereby improving the efficiency of the fan and helping to improve the efficiency of the air intake and outlet of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional schematic diagram of an air purification device is shown;

[0017] Figure 2 A three-dimensional schematic diagram of a water washing unit is shown;

[0018] Figure 3 Show Figure 2 Enlarged view at point A;

[0019] Figure 4 A schematic diagram of a water washing assembly for forming a water curtain is shown;

[0020] Figure 5 A cross-sectional view of a cylinder and a power unit is shown;

[0021] Figure 6 is a three-dimensional schematic diagram of another air purification device;

[0022] Figure 7 A partial cross-sectional view showing a power unit of an air purification device;

[0023] Figure 8 An exploded view of an air purification device is shown;

[0024] Figure 9 Show Figure 6 A longitudinal perspective cross-sectional view of

[0025] Figure 10 Show Figure 9 A magnified view at position I;

[0026] Figure 11 A partial transverse perspective cross-sectional view of the second base shell is shown;

[0027] Figure 12 A longitudinal sectional view of the second base shell at the fixing ring portion is shown;

[0028] Figure 13 A partial transverse perspective cross-sectional view of a carrier section and a primary filter assembly thereon is shown;

[0029] Figure 14 Show Figure 13 Enlarged view at G;

[0030] Figure 15 A partial perspective schematic diagram of a carrier section and a primary filter assembly is shown;

[0031] Figure 16 Show Figure 15 Enlarged view at H;

[0032] Figure 17 A top view of a substrate is shown;

[0033] Figure 18 A schematic diagram showing another water washing section;

[0034] Figure 19 Show Figure 1 Schematic diagram of a partial explosion;

[0035] Figure 20 Show Figure 1 A vertical stereoscopic diagram of

[0036] Figure 21 Show Figure 1 A transverse cross-sectional view of the middle position of the air outlet cover;

[0037] Figure 22 A three-dimensional schematic diagram of an air outlet cover and a base is shown. DETAILED DESCRIPTION

[0038] First, it should be understood by those skilled in the art that these embodiments are merely used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art may make adjustments as needed to adapt to specific applications. For example, although the air purification device of the present invention is described in conjunction with air conditioning equipment, this is not limiting, and other equipment with water-washed air use requirements may be configured with the air purification device of the present invention.

[0039] Figure 1 A three-dimensional schematic diagram of an air purification device is shown. Figure 1 As shown, based on the direction of gas flow, the system comprises an air inlet 3, a water scrubber 1, and an air outlet 4. The air inlet 3 is located at the bottom of the entire device, the water scrubber 1 is located above the air inlet 3, and the air outlet 4 is located above the water scrubber 1. Dust-laden air from the outside enters the air inlet 3 from below and is guided through the air inlet 3 into the water tank 11 of the water scrubber 1. The water scrubber assembly in the water tank 11 purifies the air, producing clean air that then flows out through the air outlet 4 to the outside.

[0040] exist Figure 1 In the embodiment, the air purification device is further provided with a base 5 for supporting the water tank 11. The air inlet 3 and the power unit 2 can be arranged on the base 5 to achieve a modular and integrated arrangement. In other words, the air inlet 3 can be formed into an integral part with the base 5 by molding. For example, the side wall or bottom wall of the integral part serves as the air inlet 3, and the bottom wall of the integral part is used to mount the power unit 2 and support the water tank 11.

[0041] The water tank 11 has an air inlet connected to the air inlet portion 3 and an air outlet connected to the air outlet portion 4. For example, the air outlet portion 4 may include an air outlet cover 41, which may be arranged to cover the air outlet of the water tank 11. The purified gas enters the air outlet cover 41 from the air outlet of the water tank 11, so that the purified gas can be guided to any desired direction through the air outlet cover 41. For example, Figure 1 The figure shows that the purified air discharged from the air outlet of the water tank 11 is led to the Figure 1 The left, right, and back sides of the .

[0042] The following is a detailed description of each part of the air purification device.

[0043] First, the water tank 11 will be described below.

[0044] Figure 2 Shows a three-dimensional schematic diagram of a water washing unit; Figure 2 As shown, water tank 11 can be made of a transparent material, such as a transparent plastic molded therein. Water tank 11 can contain a cleaning fluid for cleaning air. This cleaning fluid can be, but is not limited to, pure water. For example, it can also be water mixed with a disinfectant. For simplicity, the following description uses water as an example, but this should not be construed as a specific limitation on the scope of protection.

[0045] like Figure 2 As shown, the upper portion of the water tank 11 is used for gas flow, and the lower portion of the water tank 11 is used for holding water. The air inlet 111 of the water tank 11 can be set on the upper side wall of the water tank 11. A primary filter assembly can be set on the outside of the air inlet 111 as described below, and a side water retaining structure can be set on the inside of the air inlet as described below. A humidification filter assembly can also be optionally set on the inside of the side water retaining structure.

[0046] Continue as Figure 2 As shown, the top of the water tank 11 can be opened to serve as an air outlet, and the gas entering the water tank 11 can flow out from the top opening of the water tank 11. An upper water retaining structure 15 can be provided at the air outlet as described below.

[0047] It should be noted that the positions of the air inlet 111 and the air outlet can also be set to different positions. Figure 2 As shown. For example, the positions of the air inlet 111 and the air outlet can be swapped, or in some examples, the air inlet 111 and the air outlet can be set on opposite side walls of the water tank 11. The following describes the air purification device of this embodiment using the air inlet 111 set on the side wall of the water tank as an example. For other arrangements of the air outlet, those skilled in the art can refer to the following and will not be repeated here.

[0048] Continue to refer Figure 2 The number of air inlets 111 can be multiple, but only one can be provided. The shape and size of each air inlet 111 can be set according to actual needs. Figure 2 As shown, when there are multiple air inlets 111, these air inlets 111 can be evenly distributed along the circumference of the side wall of the water tank 11 to evenly distribute the gas so that the gas entering the water tank 11 is evenly distributed.

[0049] It is worth noting that when the air inlet is located on the side wall of the water tank 11 and the air outlet is located at the top of the water tank 11, the upper end surface of the air inlet should be lower than the plane of the water curtain formed by the water washing assembly. This ensures that the dust-laden air entering the water tank 11 through the air inlet can only flow out of the air outlet of the water tank 11 after being cleaned by the water curtain. It should be pointed out that because water is affected by gravity, the plane of the water curtain here is a general reference. In principle, the upper end surface of the air inlet should be located below the intersection of the water curtain and the side wall.

[0050] As can be seen from the above, the lower part of the water tank 11 is used to hold water, so scale lines can be set on the lower side wall of the water tank so that the user can observe and control the liquid level of the water tank 11. It is easy to understand that the water tank 11 can also be made of transparent material only in the part where the scale lines are set, and the rest of the part can be made of non-transparent material, so that the user can observe the water level in the water tank 11 through the scale lines in the transparent part. Figure 2 As shown, the scale lines may include a minimum liquid level line, which may be indicated by "0"; or a maximum liquid level line, which may be indicated by "max". It is understandable that the scale line marked with "max" is located below the air inlet.

[0051] Figure 4 A schematic diagram of a water washing assembly for forming a water curtain is shown, Figure 4 As shown, the water washing assembly can lift the water stored in the water tank 11 upward and spray the water toward the inner wall of the water tank 11. Specifically, the water washing assembly may include a hollow cylinder 12, the lower end of which is connected to the lower end of the water tank 11. Exemplarily, the lower end of the cylinder 12 is open. There is a gap between the lower end opening of the cylinder 12 and the bottom wall of the water tank 11, so that the water in the water tank 11 enters the interior of the cylinder 12 through the gap. The power unit 2 can rotate the cylinder 12 around its own axis, so that the water entering the cylinder 12 gradually moves upward along the inner wall of the cylinder 12 under the action of the rotational force. A plurality of water-spinning holes 121 are provided along the circumference of the side wall of the cylinder 12 near the top. These water-spinning holes 121 are higher than the highest liquid level of the washing liquid contained in the water tank 11, so that the water lifted from the inner wall of the cylinder 12 is thrown out from the water-spinning holes 121 and moves away from the cylinder 12 at a certain initial velocity (the initial velocity is the linear velocity at the position of the water-spinning holes 121) and gradually approaches the inner wall of the water tank 11, thereby forming a water curtain to clean the gas entering from the air inlet. It should be noted that the plurality of water-spinning holes 121 can be arranged in a circle uniformly or non-uniformly along the circumference of the cylinder 12, and in some examples, multiple circles of water-spinning holes 121 can also be provided along the axis of the cylinder 12 to improve the effect of water washing and purification.

[0052] Continue to refer Figure 4The side wall of the cylinder 12 can be gradually inclined from top to bottom toward the direction away from the axis of the cylinder 12, that is, the cylinder 12 is configured to be roughly conical, with the small diameter end of the cone located at the bottom and the large diameter end of the cone located at the top, so as to facilitate water to climb up along the inner wall of the cylinder 12.

[0053] Continue to refer Figure 4 The cylinder 12 can be divided into an upper section 122 and a lower section 123 connected to the lower end of the upper section 122, and the water-swinging hole 121 can be provided in the upper section 122. The upper and lower sections can be made into an integral part by an integral molding method such as injection molding, so as to facilitate the structural stability of the cylinder 12. Of course, the upper and lower sections of the cylinder 12 can also be separate parts, and the two are then assembled together by screwing, rotating or welding, and the lower end of the upper section 122 and the upper end of the lower section 123 can be mutually nested. For example, the upper end of the lower section 123 can extend into the lower end of the upper section 122 to enhance the sealing between the upper section 122 and the lower section 123.

[0054] It should be noted that when the diameter of the lower end of the upper section 122 is larger than the diameter of the upper end of the lower section 123, a step can be formed at the junction of the upper section 122 and the lower section 123. By forming a step between the upper and lower sections, a temporary storage area is provided for water to climb the inner wall of the cylinder 12, which is conducive to increasing the amount of water thrown out from the water-throwing hole 121.

[0055] Optionally, Figure 5 A cross-sectional view of the cylinder and the power part is shown to illustrate the connection between the upper section 122 and the lower section 123. The upper section 122 may include an upper cylinder and an inner flange. The inner flange may include a radial section and an axial section. The radial section may abut against the upper end surface of the outer flange mentioned below, and the axial section may be bent downward relative to the radial section.

[0056] The lower section 123 can be embedded in the flange. Exemplarily, the lower section 123 can include a lower cylinder and an outer flange. The outer flange can be sleeved on the outer side of the upper end of the lower cylinder, and one end of the outer flange can be higher than the upper end of the lower cylinder. The axial section of the inner flange abuts the top of the lower cylinder, and the radial section of the inner flange abuts the outer flange. In this way, the side of the axial section away from the radial section can be located on the same curved surface as the lower cylinder. This provides a smooth climbing curved surface for the droplets. In addition, the outer flange and the inner flange cooperate with each other and block the gaps with each other, which can facilitate improving the sealing between the upper section 122 and the lower section 123. Lower cylinder outer flange Outer flange Lower cylinder outer flange Lower cylinder outer flange Lower cylinder Lower cylinder Upper cylinder inner flange Inner flange Radial section Axial section Radial section Outer flange Axial section Axial section Radial section Outer flange Lower cylinder outer flange Inner flange

[0057] It is worth noting that, in order to achieve sealing between the upper section 122 and the lower section 123, a sealing member may be provided between the lower section 123 and the upper section 122. The sealing member includes but is not limited to a sealing ring, a sealing gasket, and the like.

[0058] Optionally, the angle between the sidewall of the lower section 123 and the axis of the cylinder 12 can be greater than the angle between the sidewall of the upper section 122 and the sidewall of the cylinder 12. Water rises rapidly in the lower section 123, allowing it to escape the support or adhesion of the inner wall of the upper section 122 within the upper section 122, making it easier for it to be ejected from the water ejection hole 121. Furthermore, the change in the tilt angle of the upper section 122 can also be considered based on the size of the air inlet opening. It is understandable that the direction of the initial velocity of water ejected from the water ejection hole 121 upon leaving the upper section 122 may be related to the cross-section of the upper section 122. This initial velocity influences the trajectory of the ejected water and, in turn, the contact area between the ejected water and the air. By rationally adjusting one or more of the position of the water ejection hole 121 on the cylinder 12, the rotational speed of the cylinder 12, or the cross-section of the cylinder 12 where the water ejection hole 121 is located, the quality of the water curtain formed by the water washing assembly can be improved, thereby enhancing the air purification effect.

[0059] like Figure 5 As shown, the upper end of the cylinder 12 may be open, and an upper cover 13 may be provided at the upper end of the cylinder 12. The upper cover 13 may be used to close the upper end opening of the cylinder 12. In addition, when the water in the cylinder 12 rises to the upper end surface of the cylinder 12 as the cylinder 12 rotates, the water may be blocked by the upper end surface and fall, so that at least part of the water blocked by the upper end surface flows out from the water-splitting hole 121, thereby increasing the water output of the water-splitting hole 121.

[0060] Optionally, the upper cover 13 may include a bottom wall and a side wall. The bottom wall of the upper cover 13 may abut against the upper end surface of the cylinder 12, and the side wall of the upper cover 13 may be sleeved on the outer side of the cylinder 12. The lower end surface of the side wall of the upper cover 13 is located above the water-swing hole 121 so as to block at least part of the water that has a tendency to move upward. It can be understood that the initial velocity of at least part of the water thrown out of the water-swing hole 121 has a tendency to move upward, and the movement trajectory of this part of the water may be above the moving range of the gas. This part of the water may not come into contact with the gas. By appropriately providing a flange extending away from the cylinder 12 on the side wall of the upper cover 13, the ability to intercept water thrown out of the water-swing hole 121 and moving toward the top of the water tank 11 can be improved. The intercepted water can fall onto the outer wall of the upper section 122 below the side wall of the upper cover 13, and can be thrown toward the inner wall of the water tank 11 under the action of centrifugal force as the upper section 122 rotates to form a water curtain, thereby improving the air purification effect.

[0061] Alternatively, the cylinder 12 and the upper cover 13 can be formed into an integral part by an integral molding method such as injection molding. In this case, an upper water-retaining protrusion can be provided above the water-shedding hole 121, and the upper water-retaining protrusion extends from the outer wall of the cylinder 12 in a direction away from the cylinder 12 so as to block at least part of the water having a tendency to move toward the top of the water tank 11.

[0062] Alternatively, the upper end of the cylinder 12 is open. The water-shedding hole 121 of the cylinder 12 is provided by the opening at the top, and the water-shedding hole 121 may or may not be provided on the sidewall. When the cylinder 12 is driven to rotate, the water drawn into the cylinder 12 rises along the sidewall, and all or part of the rising water can be shed out of the top opening of the cylinder 12 to form a water curtain.

[0063] Alternatively, as Figure 4 and Figure 5 As shown, a lower water-blocking protrusion 14 can also be provided below the water-swing hole 121 , and the lower water-blocking protrusion 14 extends from the outer wall of the cylinder 12 toward a direction away from the cylinder 12 so as to block the water sprayed from the water-swing hole 121 and moving toward the bottom of the water tank 11 . It can be understood that the initial velocity of at least part of the water thrown out from the water-throwing hole 121 has a tendency to move toward the bottom of the water tank 11. On the one hand, the movement trajectory of this part of the water may be outside the movement range of the gas entering the water tank 11 from the air inlet, and this part of the water may not come into contact with the gas. By setting the lower water-retaining protrusion 14, a part of the water moving toward the bottom of the water tank 11 can be intercepted. The intercepted water can accumulate above the lower water-retaining protrusion 14 and be thrown out under the action of centrifugal force as the cylinder 12 rotates to form a water curtain, which is beneficial to improving the air purification effect; on the other hand, this part of the water is easy to fall from the air inlet on the side wall of the water tank 11 to the outside of the water tank 11. By setting the lower water-retaining protrusion 14, water can be prevented from splashing out of the water tank 11 from the air inlet to a certain extent.

[0064] like Figure 2 As shown, an upper water retaining structure 15 is provided at the air outlet of the water tank 11 for shielding the air outlet of the water tank 11. The upper water retaining structure 15 can block the water thrown out from the water-spinning hole 121 so that it does not splash out of the air outlet of the water tank 11. It should be noted that the water blocked by the upper water retaining structure 15 may include water directly thrown out from the water-spinning hole 121, and may also include water carried by the gas passing through the water curtain.

[0065] For example, Figure 3 yes Figure 2 The enlarged view at A, such as Figure 3 As shown, the upper water retaining structure 15 includes a water absorbing member 151. The water absorbing member 151 can be made of a material that can block water droplets from passing through but allow gas to pass through. For example, it can be a porous polymer material such as reticulated polyurethane foam plastic and sponge.

[0066] In addition, in order to facilitate the installation and support of the water-absorbing member 151 and to prevent the water-absorbing member 151 from excessively falling after absorbing water, the upper water retaining structure 15 may further include a support frame. The support frame may be provided in a hollow columnar shape, and the water-absorbing member 151 may be installed inside the support frame. The support frame may be installed on the top of the water tank 11 by a suitable method such as screw connection or snap connection. For example, a placement groove 112 may be provided at the top of the water tank 11, and the support frame may be embedded in the placement groove 112. For example, the bottom wall of the placement groove 112 may be used to support the bottom wall of the support frame, and the side walls of the support frame may be interference fit with the side walls of the placement groove 112 to limit the displacement of the support frame in the circumferential direction.

[0067] The support frame can also be configured as a mesh structure, which can be installed on the top of the water tank 11 in the same manner as the hollow cylindrical support frame described above. By configuring the support frame as a mesh structure, the support frame can not only improve its support force on the water absorbent member 151, but also does not affect the passage of purified gas. Optionally, the mesh of the mesh structure can be hexagonal to improve the stability of the support frame.

[0068] Optionally, the support frame may include a support section 152 and a cover section 153. The support section 152 may include a bottom wall and side walls. The side walls of the support section 152 may be connected to the outer periphery of the bottom wall of the support section 152 and extend upward. The cover section 153 may include a top wall and side walls. The side walls of the cover section 153 may be connected to the outer periphery of the top wall of the cover section 153 and extend downward. The side walls of the support section 152 may be sleeved onto the outer sides of the side walls of the cover section 153. The water-absorbing member 151 can be located in a receiving space enclosed by the bottom wall of the supporting section 152, the side walls of the covering section 153 and the top wall of the covering section 153, so that the bottom of the water-absorbing member 151 is supported by the supporting section 152, the upper end of the water-absorbing member 151 is covered by the covering section 153 to limit the top of the water-absorbing member 151, and the circumference of the water-absorbing member 151 is limited by the side walls of the covering section 153 and the side walls of the supporting section 152 to maintain the structural shape of the water-absorbing member 151 and facilitate the installation of the water-absorbing member 151.

[0069] In addition, the support section 152 and / or the cover section 153 may have a certain degree of elasticity to improve the sealing performance between the side walls of the support section 152 and the side walls of the cover section 153, thereby preventing water from splashing out of the water tank 11 from between the side walls of the support section 152 and the side walls of the cover section 153. In addition, the sealing performance can be improved by providing a sealing member between the two, or by achieving an interference fit between the cover section 153 and the support section 152.

[0070] Continue to refer Figure 3When the cover section 153 and the support section 152 form an interference fit, a mounting groove may be provided on the outer periphery of the top wall of the cover section 153. The upper end of the side wall of the support section 152 may be connected to a mounting protrusion that engages with the mounting groove. For example, the mounting protrusion may face the axis of the support section 152, and the lower end surface of the mounting protrusion may abut against the bottom wall of the mounting groove to prevent movement of the upper end of the cover section 153. Optionally, the number of mounting grooves may be one or more, and multiple mounting grooves may be evenly distributed around the outer periphery of the cover section 153.

[0071] Next, the power unit 2 will be described.

[0072] The following text Figure 5 The structure shown in FIG2 is used as an example to explain the power unit 2 and its cooperation with the cylinder 12. That is, the following example will be taken as an example in which an upper cover 13 is provided on the upper portion and the side wall of the upper cover 13 is sleeved on the outer side of the cylinder 12 to explain the situation in which the power unit 2 drives the cylinder 12 to rotate. However, it should be understood that the structure of the cylinder 12 is not limited to Figure 5 The structural form may also be other structures mentioned above.

[0073] like Figure 5 As shown, the power unit 2 may include a rotating shaft 21, a reducer and a motor 22. The motor 22 may be electrically connected to an external power supply, and the motor 22 has a motor shaft 221. The base 5 may include a base 51, and the reducer may include a first bevel gear 23 rotatably arranged on the base 51 and a second bevel gear 24 rotatably connected to the bottom of the water tank 11. The first bevel gear 23 and the second bevel gear 24 are engaged with each other, and the second bevel gear 24 may be located above the first bevel gear 23. It is understandable that the structural form of the reducer may include but is not limited to the above-mentioned structure. By adopting a detachable matching method such as the first bevel gear 23 and the second bevel gear 24, the disassembly of the water tank 11 and the base 51 can be facilitated, thereby facilitating the cleaning and / or adding water to the water tank 11. Specifically, when it is necessary to separate the water tank 11 and the base 51, it is only necessary to separate the first bevel gear 23 and the second bevel gear 24.

[0074] In addition, the motor shaft 221 can be coaxially connected to the first bevel gear 23. The rotating shaft 21 includes a first end and a second end. The first end of the rotating shaft 21 can be coaxially connected to the second bevel gear 24, and the second end of the rotating shaft 21 can be connected to the cylinder 12. Referring to the figure, it can be seen that the first end of the rotating shaft 21 can be the lower end of the rotating shaft 21, and the second end of the rotating shaft 21 can be the upper end of the rotating shaft 21. It can be understood that after the motor 22 is powered and started, the motor shaft 221 of the motor 22 can drive the first bevel gear 23 to rotate, and the first bevel gear 23 can drive the second bevel gear 24 to rotate, thereby driving the rotating shaft 21 connected to the second bevel gear 24 to rotate, so that the cylinder 12 connected to the rotating shaft 21 rotates, realizing the functions of the cylinder 12 to absorb water from the water tank 11, lift water and spray water.

[0075] Installation of motor 22:

[0076] like Figure 5 The motor 22 may include a motor body 222 and a motor shaft 221. The motor body 222 may be suspended from the base 51 to reduce the impact of motor 22 vibration on underlying components. For example, mounting claws 223 extending outward from the motor body 222 may be connected to the sidewalls of the motor body 222. The mounting claws 223 may be provided with fastening holes through which fasteners may be inserted and connected to the base 51. Illustratively, multiple mounting claws 223 may be arranged circumferentially around the outside of the motor body 222. These mounting claws 223 may be evenly distributed around the periphery of the motor body 222 to balance the forces acting on the base of the motor 22. Fasteners include, but are not limited to, bolts, screws, and locating pins. Furthermore, the base 51 may be thickened at the connection locations with the fasteners to increase its load-bearing capacity. For example, the base 51 may be provided with connecting posts 511. The ends of the connecting posts 511 distal from the base 51 may abut against the mounting claws 223. The fasteners may pass through the through holes of the mounting claws 223 and connect to the connecting posts 511. The number of the connecting posts 511 may be the same as the number of the mounting claws 223 .

[0077] In addition, a vibration-damping structure may be provided between the upper end of the motor body 222 and the base 51 to reduce the impact of vibration generated by the motor 22 on the base 51. The vibration-damping structure may include a first vibration-damping sleeve, which may be located between the upper end of the motor body 222 and the lower end surface of the base 51. The first vibration-damping sleeve may be made of an elastic material such as rubber to reduce vibration.

[0078] Installation of the first helical gear 23:

[0079] like Figure 5 As shown, the first bevel gear 23 is rotatably mounted above the base 51, and the motor shaft 221 can pass through the base 51 and connect to the first bevel gear 23. The upper end of the motor shaft 221 can be threadedly connected to the motor body 222 to achieve the installation of the motor shaft 221 and the first bevel gear 23. For example, the motor shaft 221 may include a first section and a second section that are connected, the first section of the motor shaft 221 being connected to the motor body 222, and the second section of the motor shaft 221 being threadedly connected to the first bevel gear 23. The cross-sectional radius of the first section of the motor shaft 221 is larger than the cross-sectional radius of the second section of the motor shaft 221. The lower end of the first bevel gear 23 can abut the upper end surface of the first section of the motor shaft 221 to prevent the first bevel gear 23 from moving downward. In addition, the rotation direction of the motor shaft 221 can cause the first bevel gear 23 to be threadedly tightened with the motor shaft 221, so that the motor shaft 221 can drive the first bevel gear 23 to rotate.

[0080] Optionally, a vibration-damping structure may be provided between the first helical gear 23 and the second helical gear 24 to reduce the effect of vibration on the first helical gear 23 on the second helical gear 24. The vibration-damping structure may include a second vibration-damping sleeve, which may be sleeved on the first helical gear 23 to increase the contact surface between the second vibration-damping sleeve and the first helical gear 23.

[0081] Installation of the second helical gear 24:

[0082] like Figure 5 As shown, the second bevel gear 24 can be mounted on the lower end of the water tank 11. To isolate the power unit 2 from the water in the water tank 11, a mounting recess 114 can be provided on the bottom wall of the water tank 11. The mounting recess 114 has a downward opening, and the second bevel gear 24 is at least partially mounted in the mounting recess 114. The mounting recess 114 extends toward the inside of the water tank 11 and is located within the cylinder 12.

[0083] Optionally, to simplify the processing and / or assembly process, a bottom plate 115 may be installed at the bottom end of the water tank 11, and the bottom plate 115 may be provided with an insertion port 1151 coaxial with the installation recess 114. Exemplarily, the bottom plate 115 is detachably connected to the water tank 11, for example, the bottom plate 115 and the water tank 11 are assembled together by screws.

[0084] The second bevel gear 24 can be mounted within the insertion opening 1151 to facilitate modular installation. For example, a limiting plate 1152 can be positioned within the insertion opening 1151. The limiting plate 1152 and the area below it define a mounting space for the second bevel gear 24. The second bevel gear 24 can be rotatably positioned within this mounting space, thereby limiting its range of motion.

[0085] Based on the above, the insertion port 1151 is located on the outside of the first bevel gear 23, so that the movable area of ​​the first bevel gear 23 and the second bevel gear 24 can be limited by the limiting plate 1152, the insertion port 1151 and the base 51. That is to say, the upper part of the second bevel gear 24 is limited by the limiting plate 1152, and the lower part of the second bevel gear 24 is limited by the first bevel gear 23, so the longitudinal movement of the second bevel gear 24 will be restricted, thereby avoiding the second bevel gear 24 and the first bevel gear 23 from disengaging, thereby ensuring the reliability of the transmission.

[0086] The lower end of the rotating shaft 21 can be threadedly connected to the second bevel gear 24. For example, the motor 22 drives the second bevel gear 24 to rotate, and the rotation direction of the second bevel gear 24 is such that the second bevel gear 24 and the rotating shaft 21 are in a state of being tightened to each other. In other words, the direction of movement of the second bevel gear 24 driven by the motor 22 can be opposite to the direction in which the rotating shaft 21 is disengaged from the second bevel gear 24, so that the second bevel gear 24 drives the rotating shaft 21 to rotate.

[0087] Installation of rotating shaft 21:

[0088] like Figure 5 As shown, the lower end of the rotating shaft 21 can be connected to the second bevel gear 24, and the rotating shaft 21 can pass through the insertion port 1151 and the mounting recess 114 from bottom to top and be connected to the upper end of the cylinder 12. In other words, the rotating shaft 21 can be rotatably installed in the insertion port 1151 and the mounting recess 114. The mounting recess 114 or the insertion port 1151 can radially limit the rotating shaft 21 to prevent the rotating shaft 21 from bending and damage. For example, a bearing 25 can be provided in the insertion port 1151, and the rotating shaft 21 can be rotatably set inside the insertion port 1151 through the bearing 25, and the bearing 25 can play a role in radial support for the rotating shaft 21. Optionally, the limiting plate 1152 can divide the insertion port 1151 into a first area and a second area arranged side by side in the upper and lower directions. The second bevel gear 24 can be located in the first area below the limiting plate 1152, and the bearing 25 can be located in the second area above the limiting plate 1152, so as to achieve modular installation.

[0089] Optionally, an oil seal 27 and a gasket 26 may be provided in the second region. Gasket 26 may be located between bearing 25 and oil seal 27. Gasket 26 isolates oil seal 27 from bearing 25 and prevents the rolling elements of bearing 25 from sliding out. Oil seal 27 seals shaft 21 to prevent the ingress of dust, liquids, and the like.

[0090] Optionally, a bearing 25 may be provided at the upper end of the mounting recess 114 to radially support the rotating shaft 21. The gasket 26 and the oil seal 27 mentioned above may also be provided at the upper end of the mounting recess 114.

[0091] It should be noted that the bearing 25 , the gasket 26 and the oil seal 27 on the mounting recess 114 and the insertion port 1151 may be symmetrically arranged.

[0092] like Figure 5 As shown, a connecting member 28 may be provided between the upper end side wall of the rotating shaft 21 and the inner wall of the cylinder 12 so as to connect the rotating shaft 21 and the cylinder 12 together through the connecting member 28. The connecting member 28 may be provided above the mounting recess 114 (e.g., Figure 5 As shown in FIG. 2 ), the connector 28 may include a sleeve 281 and a connecting piece 282. The sleeve 281 may be mounted on the outside of the first end of the rotating shaft 21, and the two sides of the connecting piece 282 are respectively connected to the outside of the sleeve 281 and the inner wall of the cylinder 12. In this way, the connection between the rotating shaft 21 and the cylinder 12 is achieved. To improve sealing performance, the sleeve 281 may be formed as an integral part with the bottom wall of the water tank 11 by a method such as injection molding.

[0093] There may be one or more connecting pieces 282. When there are multiple connecting pieces 282, the multiple connecting pieces 282 may be evenly distributed around the circumference of the rotating shaft 21 to improve the connection strength between the connecting member 28 and the cylinder 12. At the same time, the connecting pieces 282 may also support the cylinder 12 to improve the structural strength of the cylinder 12.

[0094] Continue to refer Figure 5 , the top end of the rotating shaft 21 can be connected to the upper cover 13 to simultaneously drive the upper cover 13 to rotate. Exemplarily, the inner wall of the upper cover 13 can be provided with a mounting block, the mounting block extends downward, and the upper end of the rotating shaft 21 can be threadedly connected to the mounting block.

[0095] In addition, if Figure 5 As shown, reinforcing ribs may be provided between the outer wall of the mounting block and the upper cover 13 to support the mounting block and enhance its strength. For example, one end of the rib is connected to the outer wall of the mounting block, while the other end extends toward and connects to the inner wall of the upper cover 13. Alternatively, the ribs may be provided around the circumference of the mounting block to enhance its circumferential strength.

[0096] Alternatively, as Figure 5 As shown, an annular protrusion may be connected to the bottom wall of the upper cover 13, and the annular protrusion may extend toward the bottom end of the barrel 12. A gap is provided between the annular protrusion and the side wall of the upper cover 13, and the top end of the side wall of the barrel 12 may extend into the gap.

[0097] When air is drawn from below, dust-laden gas enters the water tank 11 from below and must be guided by the air inlet 3 through the air inlet of the water tank 11. The fan can be installed in the lower air inlet 3 or the upper air outlet 4. When the fan is located in the lower air inlet 3, the center of gravity of the air purification device is lowered, making the device more stable. The following uses the example of a fan located in the air inlet 3 to illustrate the distribution of the various components of the device when air is drawn from below.

[0098] It can be understood that when the fan is located at the air inlet part 3, since the air inlet part 3 is located at the lower end of the device, it can be seen from the above that the power part 2 is also located at the lower end of the device, so how to solve the installation of the fan and the motor 22 of the power part 2, and how to guide the gas entering from the bottom upward are problems that need to be solved.

[0099] The installation methods of the fan and the motor 22 include but are not limited to the following possible implementation methods:

[0100] In one possible implementation, Figure 7 A partial cross-sectional view of the power unit of an air purification device is shown. Figure 7As shown, the motor 22 is a dual-shaft motor 29 , which includes a dual-shaft motor body 291 , a first motor shaft 292 , and a second motor shaft 293 . The blower may include a fan 32 .

[0101] Illustratively, a first motor shaft 292 extends upward from the dual-shaft motor body 291, and a second motor shaft 293 extends downward from the dual-shaft motor body 291. The first motor shaft 292 can be connected to the first bevel gear 23, so that the drum 12 rotates to spin water, forming a water curtain within the water tank 11. The second motor shaft 293 is connected to the fan 32, so as to drive the fan 32 to rotate, thereby conveying dust-laden air from below into the water tank 11 above. It will be appreciated that both the first bevel gear 23 and the fan 32 can be driven by the same motor 22, which can reduce cost and weight and facilitate installation.

[0102] Optionally, the dual-axis motor 29 can be suspended and mounted on the base 51. For specific implementations, refer to the installation of the motor 22 and base 51 described above. Specifically, mounting claws 223 are evenly distributed around the outer circumference of the dual-axis motor body 291. The mounting claws 223 may be provided with through holes, through which fasteners can be connected to the base 51. Furthermore, since the fan 32 is connected to the lower end of the dual-axis motor body 291, the weight is increased. To improve the stability of the connection, the through holes on at least two mounting claws 223 are arranged at unequal distances from the sidewalls of the motor 22 base. For example, a plurality of first mounting claws 223 may be evenly distributed around the circumference of the dual-axis motor body 291, with a second mounting claw 223 provided between two adjacent first mounting claws 223. The first mounting claw 223 may be provided with a first through hole, and the second mounting claw 223 may be provided with a second through hole. The first through hole is located at a smaller distance from the sidewall of the dual-axis motor body 291 than the second through hole. In addition, the first mounting claw 223 and the second mounting claw 223 may be disposed at the same axial position or different axial positions of the dual-axis motor body 291 .

[0103] Optionally, the fan 32 may include a fan 32 housing and at least two fan 32 blades 161 connected to the sidewalls of the fan 32 housing. To reduce the height of the base 5 in the longitudinal direction, the fan 32 housing may be mounted on the lower end of the dual-axis motor body 291, and the fan 32 housing may rotate relative to the dual-axis motor body 291. For example, a retaining ring 294 is mounted on the second motor shaft 293, and the end of the second motor shaft 293 away from the dual-axis motor body 291 may pass through the fan 32 housing from top to bottom. A nut 295 may be threadedly connected to the end of the second motor shaft 293 that extends through the fan 32 housing, and the retaining ring 294 may abut the upper end of the bottom wall of the fan 32 housing. By rotating the nut 295, the bottom wall of the fan 32 housing can be clamped between the retaining ring 294 and the nut 295.

[0104] In order to improve the strength of the fan 32 housing at the connection position, a reinforcing block 233 may be optionally provided on the fan 32 housing. The reinforcing block 233 may include a first end and a second end, the first end of the reinforcing block 233 may be located inside the fan 32 housing, and the limiting retaining ring 294 may abut against the upper end face of the reinforcing block 233. The second end of the reinforcing block 233 may pass through the fan 32 housing and abut against the upper end face of the nut 295. The end of the second motor shaft 293 away from the dual-axis motor body 291 may pass through the reinforcing block 233 and be threadedly connected to the nut 295. In addition, a reinforcing rib 1651 may be provided between the side wall of the reinforcing block 233 and the bottom wall of the fan 32 housing to improve the strength of the reinforcing block 233. In addition, the connection between the first motor shaft 292 and the first bevel gear 23 can refer to the description above and will not be repeated here.

[0105] Optionally, the radius of the fan 32 housing may gradually increase from bottom to top, so as to guide the gas entering from below to move toward the outside and upward of the fan.

[0106] It is worth noting that the fan 32 may also have other structures. This is just an example and does not specifically limit the structure of the fan 32. As long as the fan 32 can move the gas entering the base 5 from the bottom upward, it will be sufficient.

[0107] The following describes how the air purification device with downward air intake mentioned above guides the gas flow.

[0108] Figure 8 An exploded diagram of an air purification device is shown, Figure 8 As shown, the base 5 includes a second base shell 54 and a base 51. The second base shell 54 can be cylindrical and open at both ends. The lower end of the base 51 is used to mount the motor 22 and the fan, while the upper end of the base 51 is used to accommodate the water tank 11. The second base shell 54 can be mounted on the outside of the base 51, and a predetermined gap can be provided between the second base shell 54 and the base 51 to allow air entering from below the second base shell 54 to enter the water tank 11 through the predetermined gap and the air inlet of the water tank 11.

[0109] For ease of description, the width direction of the second base shell 54 is indicated by the direction of arrow X, the length direction of the second base shell 54 is indicated by the direction of arrow Y, and the height direction of the second base shell 54 is indicated by the direction of arrow Z. For example, the water tank 11 can be pulled away from the base 51 along the length direction of the second base shell 54.

[0110] Figure 9 Show Figure 6 A longitudinal sectional view of Figure 8 and Figure 9As shown, the second base shell 54 may include, from bottom to top, a load-bearing section 541, a fan mounting section 542, and a base 51 mounting section. The load-bearing section 541 is located at the bottom of the entire device and is used to bear the weight of the dual-axis motor 29, fan, water tank 11, etc. The fan mounting section 542 corresponds to the location where the fan is installed to achieve better air intake. The base 51 mounting section is used to fix the base 51 and can also be used to guide air into the water tank 11.

[0111] Regarding the load-bearing section 541:

[0112] Optionally, Figure 11 A partial transverse perspective cross-sectional view of the second base shell 54 is shown. Figures 8-11 As shown, the load-bearing section 541 can be configured in a hollow prism shape, and a reinforcement structure can be provided on the outer sidewall of the load-bearing section 541 to improve the load-bearing capacity of the load-bearing section 541. For example, a first load-bearing flange 5411 can be provided on the sidewall of the load-bearing section 541 along the axial direction to improve the ability of the sidewall of the load-bearing section 541 to bear axial forces. There can be multiple first load-bearing flanges 5411, or only one. Figure 8 Taking the multiple first bearing flanges 5411 as an example, the multiple first bearing flanges 5411 can be evenly distributed on the side wall of the bearing section 541 .

[0113] Additionally, the outer periphery of the sidewall of the load-bearing section 541 may be connected to an outer peripheral flange 5412 to circumferentially reinforce the sidewall. The ends of the first load-bearing flange 5411 may be connected to the outer peripheral flange 5412 to improve the integrity of the multiple first load-bearing flanges 5411 and further enhance the load-bearing capacity of the sidewall of the load-bearing section 541.

[0114] In addition, a support groove 5413 may be provided at the upper end of the side wall of the bearing section 541 , and the upper end of the first bearing flange 5411 may extend into the support groove 5413 to improve the connection strength between the bearing protrusion and the side wall of the bearing section 541 .

[0115] Optionally, a second bearing flange 5414 may be connected to the inner wall of the bearing section 541. The second bearing flange 5414 may be arranged along the axis of the bearing section 541 to further improve the structural strength of the bearing section 541. In addition, the cross-section of the second bearing flange 5414 gradually decreases from top to bottom.

[0116] About the air intake grille 544:

[0117] Optionally, an air inlet grille 544 may also be provided on the bearing section 541 to isolate the fan blades 43111 and prevent the fan blades 43111 from causing harm to people. For example, the air inlet grille 544 may be provided in the bearing section 541 and may be located below the fan to allow gas to enter and prevent people from reaching in. In addition, a filter may be provided on the air inlet grille 544 to perform primary filtration of the gas. The air inlet grille 544 may include a fixing ring 5441 arranged in an annular shape, wherein a first grid bar 5442 and a second grid bar 5443 arranged in two directions may be provided in the fixing ring 5441. The first grid bar 5442 and the second grid bar 5443 may be arranged to intersect to form a mesh to evenly distribute the gas.

[0118] For example, as shown in the figure, the first lattice bars 5442 may be arranged along the radial direction of the bearing section 541, and the second lattice bars 5443 may be arranged along the circumferential direction of the bearing section 541. There may be one or more second lattice bars 5443, and when there are multiple second lattice bars 5443, the multiple second lattice bars 5443 may be arranged concentrically.

[0119] It is worth noting that the fixing ring 5441 is detachably connected to the support section 541. The fixing ring 5441 can be inserted into the support section 541 along its length. During removal or installation, the fixing ring 5441 can be moved along its length to be removed from or inserted into the support section 541. Furthermore, to ensure consistent removal or installation, the direction in which the water tank 11 is removed from the base 51 and the direction in which the fixing ring 5441 is removed from the base 51 can be aligned.

[0120] Figure 12 A longitudinal sectional view of the second base shell 54 at the fixing ring 5441 is shown. Figure 9 and Figure 12 As shown, for example, an upper flange 5415 and a lower flange 5416 may be connected to the inner wall of the bearing section 541 in the width direction. A predetermined gap may be provided between the upper flange 5415 and the lower flange 5416 in the axial direction of the bearing section 541. The fixing ring 5441 may extend between the upper flange 5415 and the lower flange 5416, and the fixing ring 5441 is constrained between the upper flange 5415 and the lower flange 5416 to achieve positioning and installation of the fixing ring 5441.

[0121] It should be noted that, along the direction in which the fixing ring 5441 passes through the bearing section 541 ( Figure 9 and Figure 8 The first and second side walls can be sequentially provided at both ends of the lengthwise direction of the support section 541 (in the direction indicated by the arrow Y). That is, when the fixing ring 5441 is mounted on the support section 541, the fixing ring 5441 passes through the first side wall and is connected to the second side wall.

[0122] Among them, such as Figure 12 As shown, the upper flange 5415 may be located below the lower flange 5416. The lower flange 5416 may include an introduction section 54161 and a positioning section 54162 connected to the introduction section 54161. The introduction section 54161 is positioned adjacent to the first sidewall of the support section 541. As the retaining ring 5441 passes through the support section 541, the introduction section 54161 may gradually tilt upward. The introduction section 54161 may serve as a guide. When the retaining ring 5441 enters the support section 541, it may tilt upward along the introduction section 54161 and enter the predetermined gap formed by the positioning section 54162 and the upper flange 5415.

[0123] In addition, if Figure 11 As shown, a clamping block may be provided on the side wall of the load-bearing section 541 between the upper flange 5415 and the lower flange 5416, and the fixing ring 5441 may be provided with an inner recess 5444 extending toward the inner side of the fixing ring 5441. The clamping block may be engaged with the inner recess 5444 to achieve a clamping fixation between the fixing ring 5441 and the inner wall of the load-bearing section 541.

[0124] In addition, one end of the fixing ring 5441 extending into the bearing section 541 can abut against the second side wall of the bearing section 541 to limit the position of the fixing ring 5441. Figure 11 As shown, in combination with the description of the first bearing flange 5411 and the second bearing flange 5414 mentioned above, the first bearing flange 5411 can be set on the outside of the side wall in the width direction of the bearing section 541 to facilitate the installation of the mounting ring. The second bearing flange 5414 can be set on the inside of the second side wall of the bearing section 541, and the upper shell of the second bearing flange 5414 is provided with a slot. The end of the fixing ring 5441 extending into the bearing section 541 can be snapped into the slot to further achieve the fixation of the fixing ring 5441 and the bearing section 541. Among them, at least one second bearing flange 5414 can be provided without a slot to maintain the structural strength of the side wall of the bearing section 541. In this case, the end of the fixing ring 5441 extending into the bearing section 541 can abut against the inner side of the second bearing protrusion.

[0125] Alternatively, as Figure 11 and Figure 12As shown, the fixing ring 5441 may be provided with a removal protrusion 5445, which may be located outside the load-bearing section 541 to facilitate user removal. Furthermore, an insertion groove 5417 may be provided on the first sidewall of the load-bearing section 541. The opening of the insertion groove 5417 may be larger than the height of the fixing ring 5441 in the axial direction of the load-bearing section 541, allowing the fixing ring 5441 to pass through the insertion groove 5417. The fixing ring 5441 may pass through the insertion groove 5417 into the interior of the load-bearing section 541. The lower end surface of the insertion groove 5417 may be flush with the introduction section 54161, allowing the fixing ring 5441 to smoothly transition from the insertion groove 5417 to the introduction section 54161.

[0126] Furthermore, a retaining block 5446 may be connected to one end of the first side wall of the fixing ring 5441 near the load-bearing section 541. The retaining block 5446 may abut against the lower end surface of the insertion groove 5417 to restrict the first side wall of the fixing ring 5441 near the load-bearing section 541 from being positioned within the insertion groove 5417. Furthermore, the retaining block 5446 may slide relative to the insertion groove 5417 to guide the fixing ring 5441 when it is disengaged from the load-bearing section 541.

[0127] It is worth noting that when air enters from below, in order to perform primary filtration on the dust-laden gas, a primary filter assembly 31 can be provided in the bearing section 541. The structure of the primary filter assembly 31 can be the filter screen provided on the air inlet grille 544 as mentioned above, or the structure described below.

[0128] For example, Figure 13 A partial transverse perspective cross-sectional view of a supporting section 541 and a primary filter assembly 31 thereon is shown. Figure 15 A partial perspective schematic diagram of a supporting section 541 and a primary filter assembly 31 is shown; Figure 13 and Figure 15 As shown, the support section 541 is provided with a filter trough, extending along the length of the support section 541. The primary filter assembly 31 includes a filter housing 315 and a filter element 316 disposed within the housing. The housing 315 has a plurality of through-holes for gas to pass through. The primary filter assembly 311 is inserted into the filter trough along the length of the support section 541. The bottom of the filter trough supports the housing 315, while the walls of the filter trough limit the circumferential position of the housing 315.

[0129] Optionally, a pull-out handle 317 may be provided on the filter housing 315 to provide a force-applying position for the user to facilitate pulling out the primary filter assembly 31 .

[0130] Optionally, Figure 14 Show Figure 13 The enlarged view at G, such as Figure 13 and Figure 14As shown, an upper limiting block 318 may be connected to the side wall of the bearing section 541, and the upper limiting block 318 may abut the upper end of the primary filter assembly 31 to limit the position of the primary filter assembly 31 in the longitudinal direction. For example, the upper limiting block 318 may extend from the tank wall of the filter tank toward the interior of the filter tank. In addition, an introduction block 3181 may be connected to the upper limiting block 318, and the introduction block 3181 may be bent upward relative to the upper limiting block 318. Along the direction in which the primary filter assembly 31 extends into the filter tank, the introduction block 3181 may gradually tilt downward toward the upper limiting block 318. In addition, two adjacent side walls of the upper limiting block 318 may be respectively connected to two adjacent tank walls to increase the connection strength of the upper limiting block 318.

[0131] Optionally, Figure 16 Show Figure 15 The enlarged view at H, such as Figure 15 and Figure 16 As shown, a lower limiting block 319 is provided on the bottom of the filter tank, and a lower limiting groove 3151 is provided on the upper shell of the filter shell 315. The lower limiting block 319 can be snapped into the lower limiting groove 3151 to achieve positioning limitation between the filter shell 315 and the filter tank along the length direction of the bearing section 541.

[0132] Optionally, when the filter trough mentioned above is used to install the primary filter assembly 31, the first bearing flange 5411 can be connected to the two outer sides of the bearing section 541 in the width direction, and the second bearing flange 5414 can be connected to an outer side wall of the bearing section 541 in the length direction, and the second bearing flange 5414 gradually tilts toward the rear end of the bearing section 541 from top to bottom so as to improve the stability of the bearing section 541.

[0133] In summary, the bearing section 541 can not only bear the weight of the entire device, but also provide installation space for the primary filter assembly 31. In addition, the sidewall of the bearing section 541 can limit the first air inlet channel for the outgoing gas.

[0134] The fan installation section 542 is introduced below.

[0135] like Figure 9 and Figure 11As shown, the fan mounting section 542 can be sleeved on the outside of the fan. The fan mounting section 542 can include a first section and a second section connected to the first section. The first section of the fan mounting section 542 can be connected to the upper end of the support section 541. From top to bottom, the first section of the fan mounting section 542 gradually bends toward the inside of the fan mounting section 542. In addition, the second section of the fan mounting section 542 can be cylindrical, and the cross-sectional radius of the second section of the fan mounting section 542 is smaller than the cross-sectional radius of the support section 541. When the gas passes through the fan, the change in cross-section causes the second section of the fan mounting section 542 to be closer to the fan, causing the gas to be concentrated toward the fan, thereby facilitating the fan to guide the gas. In addition, the first section of the fan mounting section 542 can serve to connect the support section 541 and the second section of the fan mounting section 542, so that the gas is guided toward the center.

[0136] Alternatively, as Figure 8 As shown, a stabilizing plate 5421 may be connected to the outer side of the fan installation section 542 , and the stabilizing plate 5421 may span the first section and the second section of the fan installation section 542 to improve the bearing capacity of the fan installation section 542 .

[0137] Alternatively, as Figure 8 As shown, a fixing plate 545 may be connected to the fan mounting section 542, and the fixing plate 545 may extend outward from the side wall of the fan mounting section 542. The fixing plate 545 may be connected to other components by fasteners so that the fan mounting section 542 and other components are connected.

[0138] Optionally, a through hole or a threaded hole is provided on the fixing plate 545 , and a hole position rib 5451 may be provided on the fixing plate 545 . The hole position rib 5451 may be arranged around the periphery of the through hole or the threaded hole to improve the structural strength at the position of the through hole or the threaded hole.

[0139] Optionally, the fixing plate 545 may also be provided with peripheral ribs 5452 , which may be arranged around the outer circumference of the fixing plate 545 to improve the structural strength of the fixing plate 545 .

[0140] Optionally, the fixing plate 545 may be provided with crisscrossing stabilizing ribs 5453 , which may have at least two directions, and the stabilizing ribs 5453 in one direction may intersect with at least one stabilizing rib 5453 in another direction, so as to further improve the structural strength of the fixing plate 545 .

[0141] Optionally, the hole ribs 5451, the peripheral ribs 5452, and the stabilizing ribs 5453 may be connected in pairs. In other words, at least one stabilizing rib 5453 is connected to the hole ribs 5451 or the peripheral ribs 5452 to improve the integrity of the fixing plate 545.

[0142] Optionally, a connecting rib 5455 may be provided between the fixing plate 545 and the stabilizing plate 5421 . The connecting rib 5455 may extend from the stabilizing plate 5421 toward the fixing plate 545 , which may not only support the fixing plate 545 but also improve the integrity of the fan mounting section 542 .

[0143] It is worth noting that the bearing section 541 or the mounting section of the base 51 may also be provided with the fixing plate 545 mentioned above, so as to realize the connection between the bearing section 541 or the mounting section of the base 51 and other components.

[0144] In summary, it can be understood that the fan mounting section 542 forms a centralized recess to gradually guide the air toward the fan location, thereby improving the efficiency of the fan. In addition, the sidewall of the fan mounting section 542 can define a second air inlet channel 34, which is connected to the first air inlet channel 33.

[0145] Next, the installation section of the base 51 will be described.

[0146] like Figure 9 As shown, the mounting section of the base 51 can be cylindrical and located outside the base 51. A fixing plate 5431 can be provided within the mounting section of the base 51. The fixing plates 5431 can be connected to the sidewalls of the base 51 and the mounting section of the base 51, respectively, to facilitate the installation of the base 51 and the mounting section. One or more fixing plates 5431 can be provided. Multiple fixing plates 5431 can be evenly distributed around the circumference of the base 51 to improve the stability of the connection between the base 51 and the mounting section of the base 51 and to evenly distribute the gas.

[0147] Alternatively, as Figure 9 As shown, the cross-sectional radius of the mounting section of the base 51 is larger than the cross-sectional radius of the fan mounting section 542 to increase the gas flow path. For example, an extension plate 5432 may be provided at the lower end of the mounting section of the base 51. The extension plate 5432 may extend from the mounting section of the base 51 toward the second section of the fan mounting section 542 and connect to the upper end of the second section of the fan mounting section 542. A predetermined spacing 5436 is provided between the extension plate 5432 and the sidewall of the base 51 to facilitate the passage of gas.

[0148] In addition, the upper end of the aforementioned stabilizing plate 5421 can be connected to the extension plate 5432 to enhance the connection strength between the base 51 mounting section and the fan mounting section 542. Furthermore, the lower end of the fixing plate 5431 can be connected to the upper end of the extension plate 5432, which can support the fixing plate 5431 to enhance its structural strength.

[0149] Optionally, Figure 10 Show Figure 9 The enlarged view at I, such as Figure 9 and Figure 10 As shown, the second section of the fan mounting section 542 may be connected to a wind guide protrusion 5422, and the wind guide protrusion 5422 may extend upward so as to guide the gas upward.

[0150] In addition, if Figure 9 As shown, the upper end of the mounting section of the base 51 can extend beyond the upper end surface of the air inlet of the water tank 11 and can be covered by the lower end of the air outlet cover 41 and the upper end of the water tank 11. Therefore, the air entering the mounting section of the base 51 can enter the water tank 11 through the air inlet provided in the side wall of the water tank 11. It is worth noting that the connection between the air outlet cover 41 and the mounting section of the base 51 can be referred to in the following description. The description of the air outlet cover 41 and the upper end of the water tank 11 can be referred to above.

[0151] Alternatively, as Figure 6 and Figure 8 As shown, an air inlet recess 5433 may be provided at the rear end of the base 51 mounting section near the water tank 11, and the air inlet recess 5433 may extend toward the inner side of the base 51 mounting section. Providing the air inlet recess 5433 not only reduces the weight of the second base but also guides the gas.

[0152] For example, Figure 17 A top view of a base body 5 is shown, as shown in FIG. Figure 8 、 Figure 9 as well as Figure 17 As shown, the inner side of the air inlet recess 5433 is connected to the side wall of the bottom wall, and an opening is provided on the outer side of the air inlet recess 5433. Two air inlet recesses 5433 may be provided, and the front ends of both air inlet recesses 5433 are located at the rear end of the air inlet of the water tank 11 (because the air inlet is provided in the curved portion of the water tank 11, the front ends of the air inlet recesses 5433 may be located at the rear end of the curved portion, that is, the front wall of the air inlet recess 5433 corresponds to the vertical portion of the water tank 11), so as to provide air inlet space.

[0153] It can be understood that the extension plate 5432, the mounting section of the base 51 between the two air inlet recesses 5433, the side walls of the bottom wall, the side walls of the water tank 11, and the front walls of the two air inlet recesses 5433 can define a third air inlet passage 35 for air. The third air inlet passage 35 is connected to the second air inlet passage 34. Therefore, the third air inlet passage 35 should include the position corresponding to the air inlet.

[0154] Optionally, the two air inlet recesses 5433 may be symmetrically arranged along the axis of the water tank 11 to ensure the balance and symmetry of the base 5.

[0155] Optionally, a reinforcing plate 5434 may be provided in the air inlet recess 5433 to increase the strength of the air inlet recess 5433 .

[0156] For example, both ends of the reinforcing plate 5434 may be connected to opposite side walls of the air inlet recess 5433, and one side of the reinforcing plate 5434 may be connected to the bottom wall of the air inlet recess 5433. Multiple reinforcing plates 5434 may be provided along the axis of the second base shell 54 to further enhance the structural strength of the air inlet recess 5433.

[0157] Optionally, a limiting groove 5435 may be provided at the upper end of the mounting section of the base 51, and at least a portion of the upper end of the water tank 11 is located on the limiting groove 5435 to limit the position of the upper end of the water tank 11. For example, as mentioned above, the upper end of the water tank 11 is provided with a placement groove 112, and the outer side wall and bottom wall of the placement groove 112 can abut against the limiting groove 5435 to achieve the positioning of the upper end of the water tank 11.

[0158] Next, the flow path of the gas in the second base shell 54 will be described.

[0159] like Figure 9 As shown, the outside air enters the interior of the second base shell 54 under the action of the fan. After passing through the first air inlet channel 33 enclosed by the side walls of the support section 541, the air is evenly distributed by the air inlet grille 544 thereon and filtered by the filter on the air inlet grille 544 before entering the second air inlet channel 34 formed by the diagonal flow fan 32 and the side walls of the fan mounting section 542. After exiting the second air inlet channel 34, the air enters the third air inlet channel 35 enclosed by the side walls of the base 51 mounting section and the side walls of the base 51. After being evenly distributed by the fixing plate 5431, the air enters the fourth air inlet channel 36 enclosed by the side walls of the base 51 mounting section and the side walls of the water tank 11. The air enters the interior of the water tank 11 through the fourth air inlet channel 36 and the air inlet of the water tank 11. In this way, the air flow in the second base shell 54 is completed.

[0160] It is worth noting that when air is entering from below, the fan and the motor 22 can be independent of each other, that is, the fan and the motor 22 do not share a common driving source. This situation is briefly described below.

[0161] Figure 1 A three-dimensional schematic diagram of another air purification device is shown. Figure 19 Show Figure 1 Schematic diagram of a partial explosion, Figure 20 Show Figure 1 A vertical stereoscopic diagram of Figure 19 and Figure 20 As shown, another base 5 of the air purification device includes a base 51 and a third base shell 55. The third base shell 55 is arranged on the outside of the base 51 and is used to support the base 51. The third base shell 55 has an air inlet arranged downward, and an air inlet channel for air to pass through is provided between the third base shell 55 and the base 51.

[0162] Optionally, an isolation cover 555 is connected to the bottom end of the base 51. The motor 22 includes a motor body 222 and a motor shaft 221. The isolation cover 555 is mounted outside the motor body 222 and is used to isolate the motor body 222 from the gas in the air inlet duct. The motor body 222 can be suspended from the base 51 as described above to reduce vibration.

[0163] Optionally, the isolation cover 555 and the base 51 are detachably connected to facilitate maintenance of the motor body 222 within the isolation cover 555. For example, the installation method of the isolation cover 555 and the base 51 can be obtained by referring to the installation method of the base 51 and the motor body 222 mentioned above.

[0164] Optionally, the isolation cover 555 may include a first section and a second section. The first section of the isolation cover 555 abuts against the bottom end of the base 51 and is sleeved on the outside of the motor body 222. The second section of the isolation cover 555 is located at the lower end of the motor body 222 and is used to cover the first section of the isolation cover 555. The fan is connected to the second section of the isolation cover 555.

[0165] The top of the first section of the isolation cover 555 may be provided with a positioning groove, and the bottom of the base 51 may be connected to a positioning edge strip. When the base 51 and the first section of the isolation cover 555 are connected, the positioning edge strip on the base 51 is inserted into the corresponding positioning groove, thereby achieving rapid positioning and installation of the base 51 and the first section of the isolation cover 555.

[0166] In addition, in order to improve the structural strength of the second section of the isolation cover 555 and make it suitable for the installation of the fan, the second section of the isolation cover 555 can be provided with a fan reinforcement structure on the side facing the base 51. The setting method of the fan reinforcement structure can be referred to above.

[0167] Furthermore, to provide a fan reinforcement structure on the second section of the isolation cover 555, the first section of the isolation cover 555 and the second section of the isolation cover 555 can be separately processed and formed. For example, the bottom end of the first section of the isolation cover 555 and the top end of the second section of the isolation cover 555 can be positioned and installed by cooperating with the positioning grooves and positioning flanges mentioned above.

[0168] Optionally, the second section of the isolation cover 555 can be suspended and mounted on the base 51 via fasteners. The first section of the isolation cover 555 can also be suspended and mounted on the base 51 via fasteners to improve the connection strength between the base 51 and the isolation cover 555. Alternatively, the first section of the isolation cover 555 can simply abut against the bottom end of the base 51 and be pressed against the base 51 by the compressive force between the second section of the isolation cover 555 and the base 51.

[0169] like Figure 19 and Figure 20As shown, the third base shell 55 is analogous to the second base shell 54 , and from bottom to top, it may also include a bearing section 551 , a fan installation section 552 and a base installation section 553 .

[0170] The supporting section 551 may define the first air inlet channel 33, and the supporting section 551 may be provided with the aforementioned primary filter assembly to perform preliminary adsorption filtration on the gas entering the first air inlet channel 33. It is understood that the fan mounting section 552 here also constitutes a centralized recess and may define the second air inlet channel 34. The upper end of the supporting section 551 may be connected to a first annular guide protrusion. The first guide protrusion is located below the fan and curves toward the interior of the fan to guide the gas so that it enters the fan smoothly.

[0171] The base mounting section 553 defines a third air inlet channel 35, and the third air inlet channel 35 is connected to the air inlet of the water tank 11. The difference between the third base shell 55 and the second base shell 54 is that the fan mounting section 552 and the base mounting section 553 are processed separately. An isolation seat 554 is provided between the fan mounting section 552 and the base mounting section 553. The isolation seat 554 is sleeved and connected to the outside of the isolation cover. The isolation seat 554, the fan mounting section 552 and the base mounting section 553 are arranged relative to each other and in communication. The fan mounting section 552 is used to support the isolation seat 554, and the fan mounting section 552 and the isolation seat 554 can be connected together by fasteners. The isolation seat 554 and the base mounting section 553 can be positioned and installed by cooperating with the positioning grooves and positioning edge strips mentioned above.

[0172] Optionally, a first support sheet 556 is provided between the isolation cover and the isolation seat 554 to connect the isolation cover and the isolation seat 554. One or more first support sheets 556 may be provided, and the first support sheets 556 can divide the gap between the isolation cover and the isolation seat 554 into several areas to facilitate the passage of gas and evenly distribute the gas entering the third air inlet channel 35 so that it enters the air inlet of the water tank 11 evenly.

[0173] Furthermore, the first support piece 556 is tilted relative to the axial direction of the isolation cover 555, and its tilt direction aligns with the direction of fan rotation to facilitate gas flow. Furthermore, a second support piece 557 is provided between the isolation cover 555 and the isolation seat 554. The second support piece 557 is connected to the first support piece 556 to enhance the connection strength between the isolation cover 555 and the isolation seat 554. From bottom to top, the second support piece 557 gradually tilts away from the first support piece 556, forming an acute angle between the first support piece 556 and the second support piece 557, facilitating the passage and positioning of electrical wires.

[0174] Understandably, a possible air intake flow path for this type of fan, which may not share a driving source with the motor 22, is as follows: Under the action of the fan, dust-laden air from the outside enters the first air inlet channel 33 from the air inlet below the third base shell 55, i.e., the air inlet of the bearing section 551, where it is filtered by the primary filter assembly. It then enters the second air inlet channel 34, where it is guided by the fan in the second air inlet channel 34 toward the fan's circumferential direction, continues to rise, enters the third air inlet channel 35, and enters the water tank 11 through the third channel.

[0175] The air outlet portion 4 of the downward air inlet method is described below:

[0176] First, for devices that take in air from below, the fan can be set at the lower end of the water tank 11 or at the upper end of the water tank 11. The air outlet hood 41 is a component that guides the gas flowing out of the water tank 11. The air outlet hood 41 is generally set at the upper end of the water tank 11, so the fan can be set in the air outlet hood 41 or not. For the form in which the fan is set in the air outlet hood 41, refer to the above. The following mainly describes the structure of the air outlet hood 41 for the case where the fan is not set in the air outlet hood 41.

[0177] Secondly, the air outlet cover 41 can be arranged in at least two different ways according to the different positions of the air outlet of the water tank 11. Of course, the arrangement of the air outlet cover 41 is not limited to this, and the following is just an example.

[0178] One possible implementation is, Figure 8 and Figure 9 As shown, the upper end of the water tank 11 may be provided with an air outlet cover 41, and the air outlet cover 41 may be arranged on the upper end of the base mounting section 543. The air outlet cover 41 may cover the upper end openings of the water tank 11 and the base mounting section 543. Therefore, the air outlet cover 41 located at the upper end of the base mounting section 543 and the water tank 11 may be equivalent to the air inlet baffle mentioned above. The air outlet cover 41 may include a first guide shell 435 and a second guide shell 436 connected to the side wall of the first guide shell 435. The first guide shell 435 is sleeved on the upper end of the water tank 11 and is sealed with the upper end side wall of the water tank 11. Exemplarily, a seal is provided between the first guide shell 435 and the upper end of the water tank 11, and the seal includes but is not limited to a sealing gasket.

[0179] Optionally, a second guide housing 436 extends from the first guide housing 435 toward the outside of the air hood 41. The second guide housing 436 has an opening facing the outside of the air hood 41, which serves as the air outlet for the air hood 41. Furthermore, a ring-shaped mounting protrusion 413 is connected to the upper shell of the second guide housing 436, and the mounting protrusion 413 extends downward. The upper end of the base mounting section 543 is embedded within the mounting protrusion 413. The base mounting section 543 and the mounting protrusion 413 are sealed together to prevent air from leaking out.

[0180] Optionally, the upper wall of the second guide shell 436 is gradually inclined upward from the axis of the first guide shell 435 to the outer periphery of the first guide shell 435 , so as to increase the air outlet area of ​​the second guide shell 436 .

[0181] Alternatively, as Figure 8 As shown, the air outlet of the air outlet cover 41 may include a first air outlet hole and a second air outlet hole. Two first air outlet holes may be provided, and the two first air outlet holes may be symmetrically arranged relative to the axis of the air outlet cover 41. Two second air outlet holes may be provided between the two first air outlet holes, and the two second air outlet holes may be symmetrically arranged relative to the axis of the air outlet cover 41, so that the purified air is directed to the left side, right side, and rear side (or front side) in the figure.

[0182] Optionally, the first guide shell 435 may be provided with a reinforcement structure to improve the structural strength of the air outlet cover 41. The reinforcement structure may also include an annular reinforcement protrusion and a radial protrusion provided in a radial direction.

[0183] In another possible implementation, Figure 18 A schematic diagram of another water washing section is shown, such as Figure 1 、 Figures 18-20 As shown, the air inlet and the air outlet of the water tank 11 can both be arranged on the side wall of the water tank, and the air outlet of the water tank 11 is higher than the air inlet of the water tank 11. The upper water retaining structure 15 mentioned above is provided between the air inlet of the water tank 11 and the air outlet of the water tank 11 so that the air inlet of the water tank 11 and the air outlet of the water tank 11 do not affect each other.

[0184] Optionally, the top of the base 5 is located between the air inlet and air outlet of the water tank 11. The top of the base 5 is used to guide the air in the air inlet channel into the air inlet of the water tank 11. The top of the base 5 is the top of the base mounting section 543. The top of the base mounting section 543 is connected to the top of the base 51 to form the third air inlet channel 35. This prevents the air in the third air inlet channel 35 from flowing in an upward direction, converting it to a horizontal flow, and then entering the water tank 11 through the air inlet of the water tank 11.

[0185] Optionally, the top of the water tank 11 is open, and a cover 44 is provided on the top of the water tank 11 for covering the open top of the water tank 11. The cover 44 is used to guide the gas in the water tank 11 to flow toward the air outlet of the water tank 11. The cover 44 may be provided with a guide recess 441, which has an upward opening. From top to bottom, the cross-section of at least part of the guide recess 441 gradually decreases, so that the gas flowing out from the middle of the water tank 11 flows toward the sidewalls of the water tank 11.

[0186] Optionally, an air outlet cover 41 is sleeved on the outside of the air outlet of the water tank 11. The air outlet cover 41 has an air inlet and an air outlet. The air inlet of the air outlet cover 41 is connected to the air outlet of the water tank 11. From the air inlet of the air outlet cover 41 to the air outlet of the air outlet cover 41, at least part of the air outlet cover 41 is gradually expanded in the axial direction of the water tank 11 to increase the air output of the air outlet of the air outlet cover 41. In addition, Figure 21 Show Figure 1 A transverse cross-sectional view at the middle position of the air outlet hood, such as Figure 21 As shown, from the air inlet of the air outlet cover 41 to the air outlet of the air outlet cover 41, at least a portion of the air outlet cover 41 is gradually contracted in the circumferential direction of the water tank 11 so that the gas flows out to the air outlet in a concentrated manner.

[0187] Optionally, Figure 22 A three-dimensional schematic diagram of an air outlet cover and a base is shown, as shown in FIG. Figure 22 As shown, the air hood 41 and the base 5 can be connected together by fasteners. The air hood 41 and the base 5 can be connected by the positioning edge strips and positioning grooves mentioned above to achieve positioning and assembly of the air hood 41 and the base 5.

Claims

1. A flow channel structure for a fan, characterized in that: include: A base, used for mounting the fan; A base shell is sleeved on the outside of the base and the fan, and an air inlet is provided at one end of the base shell, and the air inlet is provided close to the air inlet end of the fan; An air inlet channel for gas to pass through is provided between the base shell and the base; The bottom end of the base is connected to an isolation cover; The base shell includes a bearing section, a fan installation section, and a base installation section from bottom to top, and the bearing section is provided with a primary filter assembly; The upper end of the bearing section is connected to a first guide protrusion arranged in an annular shape, the first guide protrusion is located below the fan and is bent toward the inside of the fan; An isolation seat is provided between the fan mounting section and the base mounting section; the isolation seat is sleeved and connected to the outside of the isolation cover; the isolation seat, the fan mounting section and the base mounting section are arranged opposite to and in communication with each other, and the fan mounting section is used to support the isolation seat; A first supporting plate and a second supporting plate are provided between the isolation cover and the isolation seat, wherein: The first support piece is arranged to be tilted relative to the axial direction of the isolation cover, and the tilting direction of the first support piece is the same as the rotation direction of the fan; The second support piece is connected to the first support piece, and from bottom to top, the second support piece gradually tilts away from the first support piece, so that an acute angle is formed between the first support piece and the second support piece.

2. The flow channel structure according to claim 1, characterized in that: The base includes a bottom wall and a side wall. The fan is connected to the bottom wall of the base. The side wall of the base is connected to at least a portion of the periphery of the bottom wall of the base, and the side wall of the base extends in a direction away from the fan.

3. An air purification device, comprising a water tank, a water washing component and a fan, characterized in that: It also includes the flow channel structure according to any one of claims 1 to 2, wherein the flow channel structure includes a base and a base shell, the fan is located in the base shell, and the fan is installed on the base.

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