Humidifying device

Abstract

The embodiment of the application provides a humidifying device, which comprises: an upper cover, a liquid injection port arranged on the upper cover; a fan assembly, the fan assembly comprising a fan shell, a driving element and a fan wheel arranged in the fan shell, the fan shell comprising an opening communicated with the liquid injection port, the bottom of the fan shell comprising a liquid discharge hole and an annular flow guide part, the flow guide part being used for receiving liquid flowing from the opening and guiding the liquid to the liquid discharge hole; a liquid storage tank arranged on the side of the fan assembly away from the upper cover, the liquid storage tank being used for receiving liquid flowing from the liquid discharge hole; wherein, in the cross section along the central axis of the driving element, the cross section of the flow guide part is in a stepped shape.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and more particularly to a humidifier. Background Technology

[0002] In humidifiers with top-fill water function, the liquid needs to flow through the housing of the fan assembly to be discharged into the liquid storage tank, thereby improving the convenience of adding water to the humidifier.

[0003] However, splashing liquid droplets during water addition can wet the impeller and surrounding electrical components, potentially causing short circuits, corrosion of metal parts, and microbial contamination, directly affecting the humidifier's operational reliability and lifespan. Due to the surface tension of water, some liquid adheres to the inner wall of the fan assembly and is difficult to remove quickly. When the impeller is running, this residual liquid adhering to the inner wall of the fan assembly continuously impacts the inner wall of the air duct, generating noise. If water is added after the humidifier has been turned off, the residual liquid on the inner wall of the fan assembly will be carried away by the airflow when the impeller starts up again, forming a water mist that splashes out, affecting the humidifier's operational reliability. Utility Model Content

[0004] This application discloses a humidification device. By improving the structure of the guide section at the bottom of the fan housing, the adhesion state of the liquid caused by surface tension is broken, thereby reducing the noise and splashing problems caused by residual liquid retention and improving the operational reliability of the humidification device.

[0005] This application provides a humidification device, which includes: The top cover is provided with a liquid injection port; A fan assembly, comprising a fan housing and a drive unit and a fan wheel located within the fan housing, the fan housing including an opening communicating with the liquid injection port, the bottom of the fan housing including a drain hole and an annular guide portion, the guide portion being used to receive liquid flowing in from the opening and guide the liquid to the drain hole; A liquid storage tank is located on the side of the blower assembly opposite to the upper cover, and the liquid storage tank is used to receive the liquid flowing out from the drain hole; In particular, in the cross-section along the central axis of the drive member, the cross-section of the guide portion is stepped.

[0006] In one possible implementation, the fan housing includes an air guide ring and a bracket for mounting the drive element, the bracket and the air guide ring defining the annular opening; The fan housing also includes a bottom shell, which includes the flow guide and the drain hole. The first end of the flow guide is connected to the air guide ring, and the second end of the flow guide is close to the drain hole. The diameter of the first end of the flow guide is larger than the diameter of the second end.

[0007] In one possible implementation, the flow guide includes at least two flow guide surfaces and a connecting surface connecting adjacent flow guide surfaces, wherein the adjacent flow guide surfaces and the connecting surface form a stepped structure; At least two of the guiding surfaces have a height difference along the central axis; along the direction of liquid flow, the downstream guiding surface is farther from the central axis than the upstream guiding surface.

[0008] In one possible implementation, the guide surface is an inclined surface extending radially from the inside to the outside along the central axis; or the guide surface is an arc-shaped curved surface.

[0009] In one possible implementation, the connecting surface is an annular surface extending along the axial direction of the wind turbine assembly.

[0010] In one possible implementation, the connection between the guide surface and the connecting surface forms an angle, or the tangent at the connection between the guide surface and the connecting surface forms an angle with the connecting surface.

[0011] In one possible implementation, the impeller includes an impeller disk disposed opposite to the guide section, the impeller disk having a windward side and a leeward side, a drainage channel being formed between the leeward side of the impeller disk and the guide surface of the guide section, the drainage channel being connected to the opening and the drainage hole.

[0012] In one possible implementation, the plurality of guide surfaces include a first guide surface and a second guide surface, the first guide surface being located downstream of the second guide surface, the first guide surface having a first distance L1 between it and the leeward side of the bladed disk, and the second guide surface having a second distance L2 between it and the leeward side of the bladed disk, where L1 > L2.

[0013] In one possible implementation, the first guide surface and the leeward side of the blade disk have a first distance L1 satisfying: 7mm ≤ L1 ≤ 10mm; The second guide surface and the leeward side of the blade disk have a second distance L2 that satisfies: 4mm ≤ L2 < 7mm.

[0014] In one possible implementation, the wind turbine includes multiple blades, and the bladed disk is connected to the multiple blades, with the bladed disk extending at an angle relative to the central axis; the end of the guide portion connected to the guide ring is higher than the outer edge of the bladed disk.

[0015] In one possible implementation, the fan housing includes a bottom shell, the bottom shell including a grid portion communicating with the opening and a drain portion surrounding the grid portion, the drain portion being connected to the guide portion; the drain portion is provided with a plurality of drain holes, the plurality of drain holes being spaced apart circumferentially along the fan assembly.

[0016] In one possible implementation, a partition protruding toward the impeller is provided between the grille and the drain section, the impeller has a windproof end toward the grille, the top height of the partition is higher than the bottom height of the windproof end, and the partition is radially closer to the central axis than the windproof end.

[0017] In one possible implementation, the humidification device further includes: a humidification component located below the fan component; a water pump component capable of delivering water from the liquid storage tank to the humidification component to keep the humidification component humidified, and airflow driven by the fan component passing through the humidified humidification component and being discharged from the opening of the fan component and the liquid inlet.

[0018] The humidification device provided in this application embodiment features a stepped structure in the airflow guide of the fan assembly, reducing the amount of liquid remaining on the surface of the guide and shortening the residence time. When the impeller is running, the amount of liquid remaining on the surface of the guide is less, correspondingly reducing aerodynamic noise generated by the interaction with the high-speed airflow. When the humidification device is restarted after being turned off and refilled with water, the liquid splashing phenomenon caused by the impeller's starting airflow is also improved due to the less liquid remaining on the surface of the guide, reducing the risk of short circuits and component corrosion caused by liquid residue, and helping to improve the operational reliability of the humidification device.

[0019] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a humidification device provided in an embodiment of this application; Figure 2 A cross-sectional view of a humidification device provided in an embodiment of this application; Figure 3This is an exploded structural diagram of a fan assembly in a humidification device provided in an embodiment of this application; Figure 4 A cross-sectional view of a fan assembly in a humidification device provided in an embodiment of this application; Figure 5 for Figure 2 Enlarged view of point A in the middle; Figure 6 for Figure 2 Enlarged view of point B in the middle; Figure 7 This is one of the structural schematic diagrams of the bottom shell of the fan assembly in a humidification device provided in an embodiment of this application; Figure 8 This is a second schematic diagram of the structure of the bottom shell of the fan assembly in a humidification device provided in an embodiment of this application; Figure 9 This is a schematic diagram of the impeller structure of a fan assembly in a humidification device provided in an embodiment of this application.

[0022] Explanation of reference numerals in the attached figures: 1000-Humidifier; 1-Top cover; 10-Liquid inlet; 2-Fan assembly; 20-Fan housing; 201-Air guide ring; 202-Bottom shell; 2021-Flow guide section; 2022-Flow guide surface; 2022a-First flow guide surface; 2022b-Second flow guide surface; 2023-Connecting surface; 203-Opening; 204-Bracket; 205-Grate section; 206-Drainage section; 2061-Drainage hole; 207-Baffle section; 208-Drainage channel; 21-Drive component; 22-Impeller; 221-Impeller disc; 2211-Windproof end; 222-Fan blade; 3-Liquid storage tank; 31-Water receiving tray; 30-Box body; 4-Water pump assembly; 5-Humidifier assembly. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0025] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0026] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0027] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0028] In humidifiers with top-fill water function, the related technology uses a continuous smooth surface as the airflow guide structure of the fan casing, which causes liquid residue due to surface tension. When the impeller is running, the residual liquid impacts the inner wall of the air duct, easily generating aerodynamic noise. Even if water is added after the humidifier is turned off, the residual liquid is still easily carried up by the airflow and splashes when the humidifier is restarted, which may cause problems such as short circuits and microbial contamination, affecting the operational reliability and service life of the humidifier.

[0029] To overcome the problem of residual liquid retention in the guide section of wind turbine components, related technologies have attempted to increase the tilt angle of the guide surface in order to utilize gravity to accelerate drainage. However, an excessively large tilt angle would occupy too much structural space in the lower part of the duct, reducing the volume used to install the impeller, thus affecting the miniaturization design and performance of the wind turbine components. Furthermore, even with an increased tilt angle, the effect on the discharge of trace amounts of residual liquid remains limited due to the surface tension of the liquid.

[0030] Based on this, this application provides a humidification device. By improving the structure of the guide section at the bottom of the fan housing, the adhesion state of the liquid caused by surface tension is broken. The change in gravitational potential energy generated by the stepped structure promotes the rapid discharge of liquid from the fan assembly, thereby reducing the noise and splashing problems caused by residual liquid retention and improving the operational reliability of the humidification device.

[0031] like Figures 1 to 2As shown, the humidifier 1000 of this embodiment includes a top cover 1, a fan assembly 2, and a liquid storage tank 3. The top cover 1 is provided with a liquid inlet 10 for the user to add liquid into the humidifier 1000. The top cover 1 is located on the top of the humidifier 1000, and a control panel for user operation can be installed on the top cover 1. The top cover 1 covers the area above the fan assembly 2, thus isolating the internal components of the humidifier 1000 from the external environment.

[0032] The liquid inlet 10 can be disposed through the upper cover 1, and the liquid inlet 10 can be formed within the annular area of ​​the upper cover 1, that is, there are multiple liquid inlets 10, which are arranged at intervals along the circumference of the fan assembly 2. The multiple liquid inlets 10 arranged in an annular manner make the liquid inlets 10 form a ring layout on the surface of the upper cover 1, so that the user can approach at least one liquid inlet 10 from different directions to perform liquid addition operation, which improves the convenience of the user to add liquid to the humidifier 1000.

[0033] like Figure 3 As shown, the fan assembly 2 includes a fan housing 20 and a drive unit 21 and a fan wheel 22 disposed within the fan housing 20. The fan housing 20 is provided with an opening 203 communicating with the liquid injection port 10, so that liquid injected from the liquid injection port 10 can enter the interior of the fan housing 20 through the opening 203.

[0034] The drive unit 21 can be a drive motor, whose output shaft is fixedly connected to the hub of the impeller 22 to provide power for the rotation of the impeller 22. The drive unit 21 can be a DC brushless motor, whose speed is adjustable to adapt to different humidification airflow requirements.

[0035] The impeller 22 can be a centrifugal impeller 22, including a hub located at the center and multiple fan blades 222 distributed circumferentially along the hub. The fan blades 222 have a curved arc-shaped structure, which is beneficial to provide the wind pressure required to drive the airflow of the humidification device 1000 with lower operating noise.

[0036] The blower housing 20 is provided with an opening 203 that communicates with the liquid injection port 10, so that liquid injected from the liquid injection port 10 can enter the interior of the blower housing 20 through the opening 203. The outline shape of the opening 203 can be annular to correspond to the annular arrangement of the liquid injection ports 10 on the upper cover 1.

[0037] In some embodiments, such as Figure 2 As shown, the humidification device 1000 also includes a humidification component 5 and a water pump assembly 4. The humidification component 5 is located below the fan assembly 2 and includes a wettable substrate formed of a fiber mesh, honeycomb filler, or other porous hydrophilic material. The water pump assembly 4 is connected to the liquid storage tank 3 via a pipeline and is able to transport water from the liquid storage tank 3 to the humidification component 5, keeping the humidification component 5 in a humidified state.

[0038] When the humidifier 1000 is working, the water pump assembly 4 continuously supplies water to the humidifier assembly 5, forming a uniform water film on its surface. The fan assembly 2 drives the airflow to flow sequentially through the humidifier assembly 5, the opening 203 of the fan housing 20, and the liquid inlet 10 of the top cover 1 (which can be used for exhaust), and finally discharges it into the indoor environment. During this process, the airflow flowing through the moistened humidifier assembly 5 carries away moisture, thus achieving the humidification function.

[0039] The humidification component 5 is located below the fan component 2. The airflow first passes through the humidification component 5 for humidification, and then is discharged through the fan component 2. The water supply rate of the water pump component 4 can be adjusted according to the ambient humidity to achieve precise humidity control. By controlling the humidification level of the humidification component 5, the humidification efficiency of the humidification device 1000 can be adjusted to meet different usage needs.

[0040] The bottom of the fan housing 20 is provided with a drain hole 2061 and an annular guide section 2021. The guide section 2021 is used to receive liquid flowing in from the opening 203 and guide it to the drain hole 2061. The liquid storage tank 3 is located on the side of the fan assembly 2 away from the upper cover 1, and is used to receive liquid discharged from the drain hole 2061 to temporarily store the liquid and provide water to the humidifier 1000 when it is working.

[0041] like Figure 4 As shown, in the cross-section along the central axis of the drive member 21, the cross-section of the guide section 2021 is stepped. The "stepped" shape of the guide section 2021 means that its outline comprises multiple segments arranged along the liquid flow direction (i.e., from the opening 203 towards the drain hole 2061), and adjacent segments have a height difference in the vertical direction, making the overall shape resemble a stepped structure. This stepped structure can extend circumferentially along the central axis, forming a ring, preventing the liquid from forming a continuous liquid film and thus reducing its tendency to adhere and flow on a continuous, gently sloping surface.

[0042] In this way, the guide section 2021 divides the potentially formed continuous large-area liquid film into multiple parts, thereby reducing the adhesion area of ​​the liquid on a single inclined plane when the guide structure is a single inclined plane in related technologies. In addition, when the liquid flows from a higher "step" to the next lower "step", the gravitational potential energy is converted into kinetic energy, which accelerates the liquid flow. This helps the liquid overcome the surface tension of the guide section 2021, reduces the residence time and amount of liquid on the surface of the guide section 2021, and makes it easier for the liquid to detach from the surface of the guide section 2021 and then flow out of the fan assembly 2 quickly.

[0043] The humidifier 1000 operates as follows: The user adds water to the humidifier 1000 through the liquid inlet 10 on the top cover 1. The liquid enters the interior of the fan housing 20 through the opening 203 and falls onto the annular guide section 2021. Guided by the stepped structure of the guide section 2021, the liquid flows sequentially through the stepped structure at different heights and is finally discharged from the drain hole 2061 into the storage tank 3.

[0044] Thus, in the humidifier 1000 provided in this application embodiment, the guide section 2021 of the fan assembly 2 adopts a stepped structure, reducing the amount of liquid remaining on the surface of the guide section 2021 and shortening the residence time. When the impeller 22 is running, the amount of liquid remaining on the surface of the guide section 2021 is small, and the aerodynamic noise generated by the interaction with the high-speed airflow is correspondingly reduced. When the humidifier 1000 is restarted after being turned off and filled with water, the liquid splashing phenomenon brought up by the airflow of the impeller 22 is also improved due to the small amount of liquid remaining on the surface of the guide section 2021, reducing the risk of short circuits and component corrosion caused by liquid residue, and helping to improve the operational reliability of the humidifier 1000.

[0045] In some embodiments, such as Figure 3 As shown, the fan housing 20 includes an air guide ring 201 and a bracket 204 for mounting the drive component 21. The bracket 204 and the air guide ring 201 define an annular opening 203.

[0046] The air guide ring 201 is an annular cylindrical structure, and the inner wall contour of the air guide ring 201 conforms to the outer circumferential shape of the wind turbine 22. The air guide ring 201 is used to guide the airflow generated when the wind turbine 22 rotates, so that it flows in a predetermined direction and reduces the generation of eddies. The height of the air guide ring 201 is greater than the height of the fan blades 222 of the wind turbine 22, and the diameter is greater than the diameter of the wind turbine 22, so that it can surround the wind turbine 22.

[0047] The bracket 204 is used to mount the drive component 21 and is located in the central region of the air guide ring 201. An annular opening 203 is defined between the bracket 204 and the air guide ring 201. The annular opening 203 is located between the inner wall of the air guide ring 201 and the outer edge of the bracket 204. The annular opening 203 allows liquid injected from the injection port 10 to flow through this opening 203 to the bottom of the fan housing 20, reducing liquid concentration.

[0048] In some embodiments, the fan housing 20 further includes a bottom shell 202. The bottom shell 202 is disposed below the air guide ring 201 and connected to the lower edge of the air guide ring 201, together forming a space for accommodating the impeller 22. The bottom shell 202 includes a flow guide portion 2021 and a drain hole 2061.

[0049] The flow guide 2021 is formed on the inner bottom surface of the bottom shell 202 and is an annular structure that slopes downwards from the edge of the bottom shell 202 towards the center. The first end of the flow guide 2021 connects to the connection between the bottom shell 202 and the air guide ring 201, and the second end extends to the edge of the drain hole 2061. The diameter of the first end of the flow guide 2021 is approximately equal to the inner diameter of the air guide ring 201, and the diameter of the first end is larger than the diameter of the second end, creating a structure that converges from the periphery towards the center. This allows liquid from the annular opening 203 to converge towards the drain hole 2061 in the center of the bottom shell 202, reducing liquid residue within the bottom shell 202.

[0050] like Figure 5 and Figure 6 As shown, in some embodiments, the flow guide 2021 includes at least two flow guide surfaces 2022 and a connecting surface 2023 connecting adjacent flow guide surfaces 2022, and the adjacent flow guide surfaces 2022 and connecting surface 2023 can form a stepped structure.

[0051] The guide surface 2022 and the connecting surface 2023 are alternately connected in sequence, such that in a cross-section along the central axis of the drive member 21, the contour of the guide portion 2021 exhibits at least one stepped structure. The stepped structure may include an adjacent guide surface 2022 and a connecting surface 2023. When the guide portion 2021 includes multiple stepped structures, these stepped structures are arranged sequentially along the direction from the opening 203 to the drain hole 2061.

[0052] The connecting surface 2023 is used to connect two adjacent guide surfaces 2022, and can create a height difference between the two guide surfaces 2022. When liquid flows from the previous guide surface 2022 to the connecting surface 2023, the flow direction may change due to encountering the connecting surface 2023. When the liquid crosses the connecting surface 2023 and enters the next guide surface 2022, the flow velocity and shape of the liquid under the action of gravity may change due to the height difference between the two guide surfaces 2022.

[0053] like Figure 4 As shown, the flow guide 2021 includes at least one stepped structure, which divides the continuous liquid flow path into multiple segments, reducing the adhesion area of ​​the liquid on a single continuous surface. As the liquid flows through each stepped structure, it undergoes a change in flow state, which helps to locally disrupt the liquid surface tension, weaken the liquid's adhesion, and reduce its residue on the surface of the flow guide 2021. The continuous action of multiple stepped structures reduces the overall amount of liquid retained on the surface of the flow guide 2021 and promotes faster movement of the liquid towards the drain hole 2061.

[0054] In some embodiments, such as Figure 4As shown, the connecting surface 2023 is an annular surface extending along the axial direction of the fan assembly 2. The annular connecting surface 2023 is arranged around the central axis of the drive member 21, and its extension direction is approximately parallel to the central axis.

[0055] The connecting surface 2023 connects two adjacent guide surfaces 2022 to achieve the connection between the two guide surfaces 2022. Since the connecting surface 2023 extends axially, it creates a height difference between adjacent guide surfaces 2022. When liquid flows from the upstream guide surface 2022 to the connecting surface 2023, the flow direction will change.

[0056] The axial extension of the connecting surface 2023 forms a drop boundary at its connection with the upstream guide surface 2022, allowing the liquid to fall smoothly to the downstream guide surface 2022, reducing the accumulation of liquid in the transition area, and enabling the liquid to smoothly and quickly enter the next level guide surface 2022.

[0057] The height of the connecting surface 2023 can be determined based on the height difference between adjacent guide surfaces 2022, and its value can range from 2mm to 5mm. This height range can form an effective flow deflection without excessively increasing the axial dimension of the fan casing 20.

[0058] Thus, a stepped structure is formed by the guide surface 2022 and the connecting surface 2023, and the guide section 2021 is provided with at least one stepped structure. Compared with a smooth and continuous guide surface, it can change the flow characteristics of the liquid, thereby reducing liquid residue and promoting rapid discharge, thereby reducing aerodynamic noise during the operation of the impeller 22 and suppressing liquid splashing during equipment startup.

[0059] In some embodiments, at least two guide surfaces 2022 have a height difference along the central axis; along the direction of liquid flow, the downstream guide surface 2022 is farther from the central axis than the upstream guide surface 2022.

[0060] Adjacent annular guide surfaces 2022 are connected by a connecting surface 2023. The connecting surface 2023 is a roughly vertical annular surface that creates a height difference between two adjacent guide surfaces 2022. When liquid flows along the upstream guide surface 2022 to its edge, its flow is interrupted by the obstruction of the connecting surface 2023, thus detaching from the upstream guide surface 2022 and falling downwards.

[0061] Because the downstream guide surface 2022 is more radially convex than the upstream guide surface 2022, it provides a structural basis for the liquid to flow from the upstream guide surface 2022 to the downstream guide surface 2022. The radially expanding stepped structure, through multiple drop processes, causes the liquid to continuously change its flow state during the flow. Each drop causes the liquid to gain downward acceleration, and when the liquid impacts the downstream guide surface 2022, the resulting momentum change helps overcome the adhesion between the liquid and the upstream guide surface 2022.

[0062] Thus, by setting multiple radially outward-expanding guide surfaces 2022, the liquid distribution on the surface of the guide section 2021 is more dispersed, causing the liquid to flow to the drain hole 2061 at a faster speed, reducing the overall amount of liquid retained in the fan housing 20, thereby reducing the possibility of abnormal noise and liquid splashing during the operation of the impeller 22.

[0063] In some embodiments, the guide surface 2022 is an inclined surface extending radially from the inside to the outside along the central axis. The slopes of different guide surfaces 2022 can be the same. Alternatively, the upstream guide surface 2022 can have a smaller slope, while the downstream guide surface 2022 can have a larger slope, so that the liquid obtains a faster flow velocity when flowing through the downstream guide surface 2022.

[0064] In some embodiments, the guide surface 2022 is an arc-shaped surface radially from the inside to the outside along the central axis. The curvature of different guide surfaces 2022 can be kept consistent, or the upstream guide surface 2022 can adopt a larger curvature, while the downstream guide surface 2022 adopts a smaller curvature, so that the liquid obtains a faster flow velocity when flowing through the downstream guide surface 2022.

[0065] In some embodiments, the guide surface 2022 and the connecting surface 2023 form an angle at the connection point. That is, the connection point between the connecting surface 2023 and the guide surface 2022 may not be a smooth transition, but rather maintain an edge.

[0066] When the liquid flows through this angled connection, the flow direction of the liquid changes abruptly. This abrupt change in the flow path can disrupt the surface tension of the liquid, weaken the adhesion of the liquid on the guide surface 2022, and block the continuous spreading of the liquid film along the guide surface 2022.

[0067] In some embodiments, the guide surface 2022 is connected to the connecting surface 2023. The connecting surface 2023 is a vertical plane, and the guide surface 2022 can be an arc surface. The vertical connecting surface 2023 provides a clear height difference between adjacent arc-shaped guide surfaces 2022. When the liquid flows along the upstream arc-shaped guide surface 2022, it first passes through an arc transition zone, and the flow direction gradually changes from the tangential direction along the arc surface to approximately vertically downward, finally completing the downward flow process along the vertical connecting surface 2023.

[0068] Thus, compared to a smooth transition, the angled connection between the guide surface 2022 and the connecting surface 2023 causes a more drastic change in the liquid flow state and has a more obvious effect on disrupting the surface tension of the liquid, resulting in rapid drainage and further reducing the liquid residue on the guide section 2021.

[0069] In some embodiments, such as Figure 7 and Figure 8 As shown, the wind turbine 22 includes a bladed disk 221 disposed opposite to the airflow guide 2021. The wind turbine 22 also includes fan blades 222, and the bladed disk 221 is connected to the side of the fan blades 222 away from the upper cover 1. The bladed disk 221 includes a windward side and a leeward side, wherein the windward side faces the fan blades 222 and the leeward side faces the airflow guide 2021.

[0070] The drain channel 208 is connected to the opening 203 and the drain hole 2061, forming a path for the liquid to be discharged from the fan casing 20. Some of the liquid entering from the injection port 10 can fall directly onto the windward surface of the impeller 221 and be thrown to the guide ring 201 under the action of centrifugal force, and then flow down along the guide ring 201 to the guide section 2021, while the other part of the liquid flows directly to the guide section 2021 through the drain channel 208.

[0071] By setting the impeller 221, the liquid can be guided to flow along a predetermined path. The drainage channel 208 formed between the impeller 221 and the guide section 2021 provides a more direct discharge path for the liquid, reducing the residence time of the liquid in the fan casing 20. It is particularly suitable for applications of high-speed impeller 22, and can improve the drainage performance of the humidification device 1000 when the impeller 22 is running.

[0072] In some embodiments, such as Figure 5 and Figure 6 As shown, the multiple guiding surfaces 2022 include a first guiding surface 2022a and a second guiding surface 2022b. The first guiding surface 2022a is located downstream of the second guiding surface 2022b, that is, along the direction in which the liquid flows from the opening 203 to the drain hole 2061, the liquid first flows through the second guiding surface 2022b and then through the first guiding surface 2022a.

[0073] Specifically, the first distance L1 between the downstream first guide surface 2022a and the leeward side of the bladed disk 221 is larger than the second distance L2 between the upstream second guide surface 2022b and the leeward side of the bladed disk 221. The leeward side of the bladed disk 221 can be an annular conical surface. The dimensional relationship between the first distance L1 and the second distance L2 can reduce the shear strength of the rotating bladed disk 221 on the air of the first guide surface 2022a, thereby reducing the eddy noise generated by airflow disturbance. At the same time, since the first distance L1 is larger than the second distance L2, the drain channel 208 forms a gradually widening channel along the liquid flow direction, which helps to reduce the flow resistance of the liquid in the drain channel 208, allowing the liquid to pass through the drain channel 208 more smoothly.

[0074] It is understandable that when liquid enters the relatively loose drainage channel 208 area formed between the first guide surface 2022a and the leeward side of the impeller 221 from the relatively narrow drainage channel 208 area formed between the second guide surface 2022b and the leeward side of the impeller 221, the air trapped in the liquid is more likely to escape, and the possibility of bubbles being discharged with the liquid is reduced, thereby reducing the aerodynamic noise during the drainage process.

[0075] Thus, the aforementioned spacing variation structure causes the drainage channel 208 to form an expanding flow channel. This expanding flow channel can slow down and diffuse the liquid flow, causing the liquid to quickly leave the second guide surface 2022b and be concentrated and guided to the first guide surface 2022a. The expansion trend of the flow channel generated by the first guide surface 2022a further buffers the liquid flow rate, achieving rapid drainage while further reducing liquid splashing and discharge noise.

[0076] In some embodiments, the first distance L1 between the first guide surface 2022a and the impeller 221 satisfies: 7mm ≤ L1 ≤ 10mm.

[0077] L1 ≥ 7mm, meaning the minimum vertical distance between the first guide surface 2022a and the impeller 221 is greater than or equal to 7mm, ensuring that the drainage channel 208 formed by the first guide surface 2022a and the impeller 221 has sufficient flow area. This size reduces frictional resistance and wall adsorption effect during liquid flow, minimizing the risk of poor flow or blockage by impurities due to an overly narrow drainage channel 208, allowing the liquid to flow smoothly to the drainage hole 2061.

[0078] If L1≤10mm, the maximum value of the drainage channel 208 formed by the first guide surface 2022a is limited. Such a spacing can alleviate the problem of excessive liquid diffusion and loss of guiding concentration caused by excessive spacing between the first guide surface 2022a and the impeller 221.

[0079] In some embodiments, the second distance L2 between the second guide surface 2022b and the impeller 221 satisfies: 4mm ≤ L2 < 7mm.

[0080] L2≥4mm, that is, the minimum vertical distance between the second guide surface 2022b and the impeller 221 is not less than 4mm. In this way, the drainage channel 208 formed by the second guide surface 2022b has the necessary initial flow area, so that the liquid can enter smoothly and be constrained by the drainage channel 208, reducing the flow restriction of the liquid caused by the small size of the inlet end of the drainage channel 208.

[0081] If L2 < 7 mm, the initial distance between the second guide surface 2022b and the impeller 221 in the drainage channel 208 is limited, so that the distance L1 between it and the first guide surface 2022a forms an expansion relationship of L1 > L2. This helps the liquid to diffuse smoothly during the flow in the drainage channel 208, and provides a structural basis for the subsequent centralized discharge to the drainage hole 2061.

[0082] In some embodiments, the impeller 22 includes a plurality of blades 222 and an impeller disk 221 connected to the plurality of blades 222. The impeller disk 221 extends obliquely relative to the central axis of the drive member 21, such that the disk surface of the impeller disk 221 forms a certain oblique angle with the central axis.

[0083] like Figure 5 and Figure 6 As shown, in some embodiments, the connection point between the guide section 2021 and the guide ring 201 is higher than the free end of the impeller 221. Because the connection point between the guide section 2021 and the guide ring 201 is relatively high, the edge of the guide section 2021 extends above the end of the impeller 221.

[0084] Specifically, the guide section 2021 is designed to be longer, allowing it to preferentially contact the liquid injected from the injection port 10. This guides the liquid into the drainage channel 208 formed by the cooperation of the impeller 221 and the guide section 2021, reducing the risk of liquid splashing or deviating from its flow path and flowing towards the high-speed rotating fan blades 222. Furthermore, when liquid is ejected from the outer edge of the impeller 221, it first impacts the higher-positioned guide section 2021 and then flows downwards along its surface. This improves the drainage efficiency of the fan assembly 2.

[0085] like Figure 9 As shown, in some embodiments, the fan housing 20 includes a bottom shell 202. The bottom shell 202 is located at the bottom of the fan assembly 2. The bottom shell 202 includes a grille portion 205 located in its central region and a drain portion 206 disposed around the grille portion 205. The drain portion 206 is connected to one end of the guide portion 2021 opposite to the air guide ring 201.

[0086] The grille section 205 is composed of a mesh structure formed by multiple intersecting ribs. The grille section 205 communicates with the interior of the fan housing 20 to allow airflow, enabling the fan assembly 2 to draw air from inside the humidification device 1000 while preventing larger foreign objects from entering.

[0087] The drain section 206 is an annular structure surrounding the grid section 205. The vertical projection of the drain section 206 is located within the inner cavity of the humidification assembly 5 and corresponds to the water receiving tray 31 area of ​​the lower liquid storage tank 3. The drain section 206 is provided with multiple drain holes 2061, which are arranged at intervals along the circumference of the fan assembly 2 to achieve rapid drainage. The number of drain holes 2061 can be 6 to 12, evenly distributed along the circumference of the drain section 206, and the shape of each drain hole 2061 can be circular or elliptical.

[0088] Liquid flowing in from opening 203 flows into drainage channel 208 through guide section 2021 and then into drainage section 206. It flows out of fan assembly 2 through drainage hole 2061. Multiple drainage holes 2061 arranged circumferentially can collect liquid from all directions. The liquid then flows out through multiple drainage holes 2061 distributed circumferentially and drips into water receiving tray 31 of storage tank 3 located directly below it, so as to achieve liquid storage.

[0089] In some embodiments, a baffle 207 protruding toward the impeller 22 is provided between the grille portion 205 and the drain portion 206. The baffle 207 has an annular structure and is disposed around the grille portion 205.

[0090] The impeller 221 has a windproof end 2211 facing the grille portion 205, and the top of the baffle portion 207 is closer to the upper cover 1 than the windproof end 2211 of the impeller 221. The windproof end 2211 refers to the portion of the outer edge of the impeller 221 that is bent downward or extended.

[0091] The top of the baffle 207 is higher than the bottom of the windshield end 2211 of the impeller 221, and the baffle 207 is closer to the central axis radially than the windshield end 2211. This creates a narrow, tortuous airflow path between the grille 205 and the rotating impeller 221. When the impeller 22 rotates, the baffle 207 and the windshield end 2211 of the impeller 221 work together to prevent the high-speed airflow inside the fan casing 20 from escaping upwards and entering the drain channel 208. The top of the baffle 207 is higher than the bottom of the windshield end 2211 of the impeller 221, forming an "air seal" barrier that reduces the impact and interference of the upward airflow on the downward liquid, allowing the liquid to fall smoothly under gravity and further reducing noise and liquid splashing caused by the gas-liquid mixing flow.

[0092] The grille section 205 includes multiple vents communicating with the inner cavity of the fan housing 20. A baffle section 207 is located between the vents and the drain hole 2061. In this way, the baffle section 207 effectively prevents liquid falling from the opening 203 from splashing into or flowing towards the vents, preventing liquid from flowing back into the fan housing 20 through the vents, thereby reducing the risk of liquid erosion or operational interference to the impeller 22 and drive components 21.

[0093] Thus, the partition 207 combines the functions of waterproofing and air sealing, simplifies the structure of the fan housing 20, and realizes the miniaturization of the fan assembly 2.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A humidification device, characterized in that, The humidification device includes: The top cover is provided with a liquid injection port; A fan assembly, comprising a fan housing and a drive unit and a fan wheel located within the fan housing, the fan housing including an opening communicating with the liquid injection port, the bottom of the fan housing including a drain hole and an annular guide portion, the guide portion being used to receive liquid flowing in from the opening and guide the liquid to the drain hole; A liquid storage tank is located on the side of the blower assembly opposite to the upper cover, and the liquid storage tank is used to receive the liquid flowing out from the drain hole; In particular, in the cross-section along the central axis of the drive member, the cross-section of the guide portion is stepped.

2. The humidification device according to claim 1, characterized in that, The fan housing includes an air guide ring and a bracket for mounting the drive component, the bracket and the air guide ring defining the annular opening; The fan housing also includes a bottom shell, which includes the flow guide and the drain hole. The first end of the flow guide is connected to the air guide ring, and the second end of the flow guide is close to the drain hole. The diameter of the first end of the flow guide is larger than the diameter of the second end.

3. The humidification device according to claim 1, characterized in that, The flow guiding section includes at least two flow guiding surfaces and a connecting surface connecting adjacent flow guiding surfaces, wherein adjacent flow guiding surfaces and connecting surfaces form a stepped structure; At least two of the guiding surfaces have a height difference along the central axis; along the direction of liquid flow, the downstream guiding surface is farther from the central axis than the upstream guiding surface.

4. The humidification device according to claim 3, characterized in that, The guide surface is an inclined surface extending radially from the inside to the outside along the central axis; or the guide surface is an arc-shaped curved surface.

5. The humidification device according to claim 3, characterized in that, The connecting surface is an annular surface extending along the axial direction of the wind turbine assembly.

6. The humidification device according to claim 3, characterized in that, The connection between the guide surface and the connecting surface forms an angle, or the tangent at the connection between the guide surface and the connecting surface forms an angle with the connecting surface.

7. The humidification device according to claim 3, characterized in that, The impeller includes an impeller disk disposed opposite to the guide section. The impeller disk includes a windward side and a leeward side. A drainage channel is formed between the leeward side of the impeller disk and the guide surface of the guide section. The drainage channel is connected to the opening and the drainage hole.

8. The humidification device according to claim 7, characterized in that, The plurality of guide surfaces include a first guide surface and a second guide surface. The first guide surface is located downstream of the second guide surface. The first guide surface has a first distance L1 between itself and the leeward side of the bladed disk, and the second guide surface has a second distance L2 between itself and the leeward side of the bladed disk, where L1 > L2.

9. The humidification device according to claim 8, characterized in that, The first guide surface and the leeward side of the blade disk have a first distance L1 that satisfies: 7mm ≤ L1 ≤ 10mm; The second guide surface and the leeward side of the blade disk have a second distance L2 that satisfies: 4mm ≤ L2 < 7mm.

10. The humidification device according to claim 2, characterized in that, The fan housing includes a bottom shell, the bottom shell includes a grid portion communicating with the opening and a drain portion surrounding the grid portion, the drain portion being connected to the guide portion; The drainage section is provided with a plurality of drainage holes, which are spaced apart along the circumference of the fan assembly.

11. The humidifying device according to any one of claims 1 to 10, characterized in that, The humidification device also includes: The humidification component is located below the fan component; The water pump assembly is capable of delivering water from the storage tank to the humidification assembly to keep the humidification assembly in a humidified state. The airflow driven by the fan assembly passes through the humidified humidification assembly and is discharged from the opening of the fan assembly and the liquid injection port.

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