Humidifying device

Abstract

The embodiment of the present application discloses a humidifying device, comprising: an upper cover, a liquid adding opening is arranged on the upper cover; a fan assembly, comprising a fan shell and an impeller rotatably arranged in the fan shell, the impeller comprises a blade disc, the fan shell comprises a flow guide part, a liquid discharging channel is formed between the blade disc and the flow guide part, the fan shell is provided with a liquid discharging opening, the liquid discharging channel is in communication with the liquid adding opening and the liquid discharging opening respectively, in a certain cross section along the fan assembly, the diameter ratio of the blade disc to the flow guide part is W, W satisfies: 0.78W<0.88; a water tank is located on the side of the fan assembly away from the upper cover, and the water tank is used for receiving liquid flowing out from the liquid discharging channel.

Description

Technical Field

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

[0002] To facilitate users in replenishing water to the humidifier, some humidifiers in related technologies have the liquid inlet located on the top of the casing. The liquid inlet is connected to the fan assembly, and the replenished liquid flows into the water tank after passing through the liquid inlet and the fan assembly, thereby replenishing water to the humidifier.

[0003] However, since the liquid inlet is located within the projection range of the fan assembly, if water is added while the fan is running, the airflow can easily interfere with the water flow, causing the liquid to accumulate inside the air duct of the fan casing, making it difficult to guide the liquid smoothly and quickly to the humidification curtain. More seriously, the high-speed airflow may entrain some of the liquid and blow it out towards the air outlet, causing water spraying and affecting the working stability of the humidification device. Utility Model Content

[0004] This application discloses a humidification device with a drain channel inside the fan assembly, which enables the liquid added from the liquid inlet to pass through stably and quickly even when the fan assembly is running, reducing water accumulation and spraying during the water injection process.

[0005] This application provides a humidification device, comprising: a top cover with a liquid inlet; a fan assembly including a fan housing and an impeller rotatably disposed within the fan housing, the impeller including a blade disk, the fan housing including a guide portion, a drain channel forming between the blade disk and the guide portion, the fan housing having a drain outlet, the drain channel communicating with the liquid inlet and the drain outlet respectively, and in a predetermined cross section along the fan assembly, the diameter ratio of the blade disk to the guide portion being W, where W satisfies: 0.78 < W < 0.88; and a water tank located on the side of the fan assembly away from the top cover, the water tank being used to receive liquid flowing out from the drain channel.

[0006] In one possible implementation, the fan casing includes: The outer casing forms a receiving space, and the outer casing is connected to the top cover and located on the side of the liquid inlet away from the central axis of the humidifier; The bottom shell is connected to the outer shell. The bottom shell includes a guide section that is inclined relative to the central axis and extends toward the upper cover. A drainage channel is formed between the guide section and the impeller.

[0007] In one possible implementation, the impeller includes multiple blades, and an impeller disk is connected to the outside of the multiple blades. The impeller disk is inclined relative to the central axis and extends toward the top cover. The connection between the guide section and the casing is higher than the free end of the impeller.

[0008] In one possible implementation, the flow guide includes a first flow guide section and a second flow guide section connected to each other, wherein the second flow guide section is closer to the top cover than the first flow guide section, and the first flow guide section is closer to the central axis than the second flow guide section. The connection between the second guide section and the first guide section forms a bend angle.

[0009] In one possible implementation, the first guide section is inclined relative to the central axis and extends toward the top cover, and the second guide section is inclined relative to the central axis and extends toward the top cover. Along the radial direction of the drainage channel, there is a first gap L1 between the first guide section and the impeller, and a second gap L2 between the second guide section and the impeller, where L1 > L2.

[0010] In one possible implementation, the first gap L1 between the first guide section and the impeller disk satisfies: 7mm < L1 ≤ 10mm; The second gap L2 between the second guide section and the impeller disk satisfies: 4mm≤L2≤7mm.

[0011] In one possible implementation, the fan housing also includes a grid section connected to the flow guide section, and the number of drain ports is multiple, with the multiple drain ports spaced apart circumferentially along the humidification device in the grid section.

[0012] In one possible implementation, the wind turbine components also include: A baffle is provided in the grille section, and the impeller has a windproof end facing the grille section. The top of the baffle is closer to the top cover than the bottom of the impeller.

[0013] In one possible implementation, the grille includes a plurality of vents communicating with the inner cavity of the fan housing, and a baffle is located between the vents and the drain outlet along the radial direction of the fan assembly.

[0014] In one possible implementation, the outlet area of ​​the drain channel is larger than the inlet area of ​​the drain channel.

[0015] Thus, in the humidifier provided in this embodiment, the user adds liquid through the liquid inlet on the top cover. The liquid flows sequentially through the drain channel and the drain outlet on the fan housing, and is received by the water tank below, thereby realizing the function of adding liquid to the water tank. The diameter ratio W of the impeller forming the drain channel and the guide section is controlled between 0.78 and 0.88, which can reduce the airflow interference encountered by the liquid when passing through the fan housing. The liquid can be quickly and stably transported to the water tank by gravity, reducing the risk of water accumulation in the fan housing. This allows the humidifier to perform water filling operations while humidifying.

[0016] 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

[0017] 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.

[0018] Figure 1 This is a schematic diagram of the structure of a humidification device provided in an embodiment of this application; Figure 2 This is a cross-sectional view of a humidification device provided in an embodiment of this application; Figure 3 This is an exploded structural diagram of the fan assembly and humidification assembly in a humidification device provided in an embodiment of this application; Figure 4 This application provides a schematic diagram of the impeller structure in a fan assembly of a humidification device. Figure 5 This is one of the structural schematic diagrams of the bottom shell of the fan assembly of a humidification device provided in an embodiment of this application; Figure 6 This is a second schematic diagram of the bottom shell structure of a fan assembly in a humidification device provided in an embodiment of this application; Figure 7 for Figure 2 Enlarged view of point A in the middle; Figure 8 for Figure 2 Enlarged view of point B in the middle.

[0019] Explanation of reference numerals in the attached figures: 1-Humidifier; 10-Top cover; 101-Liquid inlet; 20-Fan assembly; 21-Fan housing; 211-Outer shell; 2111-Accommodation space; 212-Bottom shell; 2121-Guide section; 21211-First guide section; 21212-Second guide section; 21213-Bending angle; 2122-Grate section; 21221-Drain outlet; 21222-Baffle; 22-Impeller; 221-Impeller disc; 2211-Windproof end; 222-Fan blade; 23-Drainage channel; 231-Liquid inlet; 232-Liquid outlet; 30-Humidifier assembly; 40-Water tank; 50-Housing; 501-Air inlet; 60-Water pump assembly. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] like Figure 1 and Figure 2As shown in the figure, this application embodiment provides a humidification device 1. The humidification device 1 includes a housing 50, a water tank 40, a fan assembly 20, a humidification assembly 30, and a water pump assembly 60. The housing 50 has an air inlet 501 and an air outlet, forming an airflow channel between the air inlet 501 and the air outlet. The fan assembly 20 and the humidification assembly 30 are both located within the airflow channel. The airflow entering from the air inlet 501 passes through the humidification assembly 30, and the humidified humidification assembly 30 increases the humidity of the airflow. The humidified airflow is accelerated and pressurized by the fan assembly 20 and flows out of the humidification device 1 from the air outlet, thereby achieving humidification of the indoor environment.

[0026] The air inlet 501 includes multiple air holes. The air inlet 501 is located on the side wall of the housing 50 and surrounds the outer perimeter of the housing. Along the height direction of the humidifying device 1, that is, the vertical direction, the humidifying component 30 is located inside the housing and is positioned approximately corresponding to the air inlet 501, so that the airflow entering the air inlet 501 can have as much gas-liquid contact with the humidifying component 30 as possible.

[0027] like Figure 1 and Figure 2 As shown, the housing 50 includes a top cover 10. The top cover 10 is located at the top of the housing 50 and has a liquid inlet 101. The liquid inlet 101 is used to receive liquid (e.g., water) added by the user. The liquid inlet 101 can be constructed in a ring around the central axis of the housing 50. This ring structure enables circumferential water filling, allowing the user to replenish water to the humidifier 1 from any position. Figure 1 and Figure 2 As shown, the liquid inlet 101 can be reused as the air outlet of the housing 50. The liquid inlet 101 is located on the upper cover 10 to allow the humidified airflow to have a greater head when it is blown into the room.

[0028] By placing the liquid inlet 101 on the upper cover 10, water can be added from the top of the humidifier 1, facilitating the user's water filling operation. Figure 2 As shown, since the water tank 40 is located at the bottom of the humidification device 1, the water filling scheme at the top of the humidification device 1 allows the water to flow towards the water tank 40 under the action of gravity, eliminating the need for other flow guiding structures.

[0029] like Figure 2 and Figure 3 As shown, the fan assembly 20 is located below the upper cover 10. The fan assembly 20 includes a fan housing 21 and an impeller 22 rotatably disposed within the fan housing 21. The impeller 22 is driven to rotate by a motor to generate airflow.

[0030] like Figure 4As shown, the impeller 22 includes a blade disk 221, which can be a structure on the outer periphery of the impeller 22 for connecting multiple blades inside the impeller 22. The blade disk 221 is used to guide the movement of liquid and airflow.

[0031] like Figure 5 and Figure 6 As shown, the fan casing 21 includes a guide section 2121. The impeller 221 cooperates with the guide section 2121, forming an annular drainage channel 23 between them. This drainage channel 23 guides liquid from the inlet 101 downwards. The fan casing 21 also has a drain port 21221, which is typically located at the bottom of the fan casing 21 or on the side facing the water tank 40. The drainage channel 23 communicates with both the annular inlet 101 and the drain port 21221, thereby forming a liquid transport path from the inlet 101 to the water tank 40.

[0032] One side of the impeller 221 guides the airflow towards the exhaust port of the fan casing 21, while the other side, in conjunction with the guide section 2121, forms a liquid discharge channel 23. Thus, the impeller 221 physically isolates the high-speed airflow area inside the fan casing 21 from the liquid transport path, reducing the probability of gas-liquid interference. On one hand, the impeller 221 guides the airflow towards the exhaust port; on the other hand, the impeller 221 and the guide section 2121 form a flow channel for the liquid, improving the structural utilization rate of the fan casing 21.

[0033] The humidifying component 30 is located below the fan assembly 20. The humidifying component 30 is typically made of absorbent materials (such as wet film, foamed metal, non-woven fabric, etc.). Water from the water tank 40 is pumped to the humidifying component 30 via the water pump assembly 60, humidifying the component. When dry airflow enters from the air inlet of the humidifying device 1 and passes through the humidifying component 30, water vapor exchange occurs between the airflow and the moisture, increasing the humidity of the airflow and thus achieving the humidifying function of the humidifying device 1. The humidified airflow is then exhausted from the air outlet under the suction of the fan assembly 20, achieving the humidification of the indoor air.

[0034] In the actual operation of the humidifier 1, the drain channel 23 needs to meet two requirements: First, the drain channel 23 should isolate the strong airflow generated by the fan assembly 20 to prevent airflow interference or even obstruction of the liquid's downward flow. Second, the drain channel 23 should provide a sufficiently unobstructed path for the liquid, allowing it to quickly pass through the fan housing 21 by gravity, reducing liquid accumulation within the fan assembly 20. Figure 7 As shown, to achieve the above objective, in a cross-section along the axis of the fan assembly 20, the diameter ratio of the impeller 221 to the guide vane 2121 is W. This diameter ratio W satisfies: 0.78 < W < 0.88. This set cross-section passes through the guide vane 221 and the impeller 221 radially along the fan assembly 20.

[0035] For example, in a cross section along the axis of the wind turbine assembly 20, the diameter D1 of the impeller 221 is 134 mm, the diameter D2 of the guide section 2121 is 160 mm, and the diameter ratio W between the impeller 221 and the guide section 2121 is 0.83.

[0036] For example, in a cross section along the axis of the wind turbine assembly 20, the diameter D1 of the impeller 221 is 138 mm, the diameter D2 of the guide section 2121 is 162 mm, and the diameter ratio W between the impeller 221 and the guide section 2121 is 0.85.

[0037] When W > 0.78, meaning the diameter ratio between the impeller 221 and the guide section 2121 is greater than 0.78, the drainage channel 23 formed between the impeller 221 and the guide section 2121 has a relatively small radial clearance. This increases the flow resistance to radial backflow of airflow to a certain extent, thereby preventing the high-pressure airflow generated by the high-speed rotation of the impeller 22 from escaping upwards from the inner cavity of the fan casing 21. Thus, the impact of the airflow on the downward-flowing liquid is weakened, reducing the risk of splashing, atomization, or flow deviation due to aerodynamic interference. Consequently, the liquid flows downwards smoothly and centrally mainly due to gravity, which not only improves drainage efficiency but also eliminates abnormal noise caused by gas-liquid mixing and the risk of "spraying" droplets carried to the outlet by the airflow.

[0038] When W < 0.88, meaning the diameter ratio between the impeller 221 and the guide section 2121 is less than 0.88, the impeller 221 and the guide section 2121 will not be too close, thus reducing the risk of the radial clearance of the drain channel 23 being too small. Sufficient clearance ensures that the flow area of ​​the drain channel 23 is not too small, thereby reducing the probability of adsorption effects (capillary action) between the liquid and the wall surface when the liquid flows within the drain channel 23. This allows the liquid to maintain a high flow velocity under gravity, quickly flowing through the fan housing 21 and smoothly towards the drain port 21221. Simultaneously, W < 0.88 also relaxes the requirements for the machining accuracy and assembly tolerances of the fan housing 21, improving production feasibility and the reliability of the humidification device 1.

[0039] Thus, in the humidifier 1 provided in this embodiment, the user adds liquid through the liquid inlet 101 of the top cover 10. The liquid flows sequentially through the drain channel 23 and the drain outlet 21221 on the fan housing 21, and flows into the water tank 40, thereby realizing the humidification function of the humidifier 1. The diameter ratio W of the impeller 221 forming the drain channel 23 and the guide part 2121 is controlled between 0.78 and 0.88, which can reduce the airflow interference encountered by the liquid when passing through the fan housing 21. The liquid can be quickly and stably transported to the water tank 40 by gravity, reducing the risk of water accumulation in the fan housing 21. This allows the humidifier 1 to perform water filling operation while humidifying.

[0040] In some embodiments, such as Figure 8 As shown, the outlet area of ​​the outlet end 232 of the drainage channel 23 is larger than the inlet area of ​​the inlet end 231 of the drainage channel 23. The inlet end 232 refers to the starting part where the drainage channel 23 connects with the inlet port 101, and the outlet end 232 refers to the ending part where the drainage channel 23 connects with the outlet port 21221. The outlet area and the inlet area refer to the cross-sectional area perpendicular to the direction of liquid flow.

[0041] The drainage channel 23 can converge and guide the potentially dispersed liquid flowing in from the inlet 101. The drainage channel 23 has an expanding flow channel structure, with its flow area increasing from top to bottom. Thus, as the liquid flows through the drainage channel 23, the flow pattern stabilizes with the increased flow area, allowing for a more concentrated and stable flow. This controls the liquid's discharge trajectory, guiding it into the drainage outlet 21221.

[0042] In some embodiments, such as Figure 2 and Figure 3 As shown, the fan housing 21 includes an outer shell 211. The outer shell 211 forms a receiving space 2111, and the outer shell 211 is connected to the upper cover 10 and located on the side of the liquid inlet 101 away from the central axis of the humidification device 1.

[0043] By positioning the housing 211 outside the liquid inlet 101, the housing 211 helps guide the liquid from the liquid inlet 101 into the drain channel 23, thus guiding the liquid flowing from the liquid inlet 101 downwards. Furthermore, the housing 211 is arranged around the central axis of the humidifier 1, isolating the water path from external electrical components of the fan assembly 20, reducing the risk of short circuits caused by liquid contact with electrical components.

[0044] In some embodiments, such as Figure 2 , Figure 5 and Figure 6 As shown, the fan housing 21 also includes a bottom shell 212. The bottom shell 212 is connected to the outer shell 211. The bottom shell 212 includes a guide portion 2121 that is inclined relative to the central axis and extends toward the upper cover 10. A drainage channel 23 is formed between the guide portion 2121 and the impeller 221.

[0045] The guide section 2121, which extends at an angle relative to the central axis, cooperates with the impeller disk 221 of the impeller 22 to form an annular drainage channel 23 between the two guide sections. The angled extension structure can guide and converge the downward liquid. By utilizing the liquid's own gravity and the shape of the angled guide surface of the second guide surface, the liquid flows smoothly and centrally to the drainage port 21221, further improving the liquid conveying efficiency and flow trajectory controllability, and reducing splashing and stagnation during the flow process.

[0046] In some embodiments, the impeller 22 includes a plurality of blades 222, and an impeller disk 221 is connected to the outer side of the plurality of blades 222. The impeller disk 221 is inclined relative to the central axis and extends toward the upper cover 10.

[0047] The impeller 221, which extends at an incline relative to the central axis, cooperates with the guide section 2121 to form an annular drainage channel 23 between the impeller 221 and the guide section 2121. When the impeller 22 rotates with the impeller 22, the inclined structure of the impeller 221 can guide the liquid entering the drainage channel 23, guiding the liquid to flow downward along the incline, so that the liquid flows more concentratedly to the drainage port 21221.

[0048] In some embodiments, such as Figure 2 As shown, the connection between the guide section 2121 and the outer casing 211 is higher than the free end of the impeller 221. The free end of the impeller 221 is its end edge extending toward the fan casing 21 and away from the blade connection.

[0049] Because the connection point between the guide section 2121 and the outer casing 211 is relatively high, the edge of the guide section 2121 extends above the free end of the impeller 221. Specifically, the guide section 2121 is designed to be longer, allowing it to preferentially contact the liquid injected from the inlet 101. This guides the liquid into the drainage channel 23 formed by the impeller 221 and the guide section 2121, reducing the risk of liquid splashing or deviating from its flow path and flowing towards the high-speed rotating blades. This not only reduces the noise generated by the liquid hitting the impeller but also reduces the probability of rotational imbalance caused by water on the impeller.

[0050] In some embodiments, such as Figure 3 Figure 6 and Figure 8 As shown, the flow guide 2121 includes a first flow guide section 21211 and a second flow guide section 21212 connected to each other. A bend angle 21213 is formed at the connection between the second flow guide section 21212 and the first flow guide section 21211.

[0051] The second guide section 21212 is closer to the top cover 10 than the first guide section 21211, and the first guide section 21211 is closer to the central axis than the second guide section 21212.

[0052] The bend angle 21213 between the first guide section 21211 and the second guide section 21212 causes the guide section 2121 to form a "steep slope". This bend angle 21213 increases the constraint on the liquid flow path and the liquid discharge speed by changing the direction of liquid flow.

[0053] Specifically, the bend angle 21213 between the first guide section 21211 and the second guide section 21212 disrupts the adhesion tendency of the liquid on the inner wall of the guide section 2121, causing the liquid to quickly detach from the surface of the second guide section 21212 and converge towards the area of ​​the first guide section 21211, thereby reducing the adhesion and retention of liquid in the internal area of ​​the fan housing 21. It is understood that on a smooth surface, liquid is easily affected by surface tension and adheres to the wall, forming a slowly moving liquid film. This may cause liquid to accumulate in the low-lying areas of the drain channel 23, preventing the liquid from quickly draining to the drain port 21221. However, in this embodiment, the bend angle 21213 of the guide section 2121 on the fan housing 21, through its abrupt geometric shape, breaks the aforementioned adhesion tendency of the liquid, making it easier for the liquid to detach from the wall of the guide section 2121 under its own kinetic energy and gravity, producing an "accelerated falling" effect.

[0054] This "accelerated descent" effect makes the liquid flow direction more defined and concentrated, inhibiting the liquid from spreading outwards, thereby increasing the overall flow rate of the liquid discharged from the drain channel 23. Actual measurements show that the liquid can pass through the fan casing 21 and reach the water tank 40 within 3 to 5 seconds, reducing the risk of liquid accumulating inside the fan casing 21 and being splashed by the high-speed rotating impeller 22. This achieves the beneficial effects of reducing operating noise, preventing liquid splashing, and improving drainage reliability.

[0055] In some embodiments, the first guide section 21211 is inclined relative to the central axis and extends toward the upper cover 10, and the second guide section 21212 is inclined relative to the central axis and extends toward the upper cover 10.

[0056] like Figure 8 As shown, along the radial direction of the drainage channel 23, there is a first gap L1 between the first guide section 21211 and the impeller 221, and a second gap L2 between the second guide section 21212 and the impeller 221, where L1 > L2.

[0057] The radial direction of the drainage channel 23 can be understood as the width direction of the drainage channel 23. The first spacing L1 can be understood as the minimum vertical distance between the first guide section 21211 and the impeller 221. The second spacing L2 can be understood as the minimum vertical distance between the second guide section 21212 and the impeller 221.

[0058] The aforementioned spacing variation structure creates an expanding flow channel in the radial direction for the drainage channel 23. Specifically, the flow area of ​​the drainage channel 23 increases from the second guide section 21212 to the first guide section 21211. This expanding flow channel can decelerate and diffuse the liquid flow: when the liquid flows from the region of the smaller-spacing second guide section 21212 to the region of the larger-spacing first guide section 21211, the increased flow area reduces the liquid velocity, helping to stabilize the flow. This deceleration effect, combined with the "accelerated descent" effect generated by the aforementioned bend angle 21213, causes the liquid to quickly detach from the second guide section 21212 and be concentrated and guided to the first guide section 21211. The expansion trend of the flow channel generated by the first guide section 21211 further buffers the liquid velocity, achieving rapid drainage while further reducing liquid splashing and discharge noise, enhancing the overall controllability and reliability of the drainage process.

[0059] In some embodiments, the first distance L1 between the first guide section 21211 and the impeller 221 satisfies: 7mm < L1 ≤ 10mm.

[0060] L1>7mm, meaning the minimum vertical distance between the first guide section 21211 and the impeller 221 is greater than 7mm, ensuring that the drainage channel 23 formed by the first drainage section and the impeller 221 has sufficient flow area. This size reduces frictional resistance and wall adsorption effects during liquid flow, minimizing the risk of poor flow or blockage by impurities due to an overly narrow drainage channel 23, allowing the liquid to flow smoothly to the drainage port 21221.

[0061] If L1≤10mm, the maximum value of the drainage channel 23 formed by the first guide section 21211 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 section 21211 and the impeller 221, and help maintain the trajectory stability of the liquid being transported to the water tank 40.

[0062] In some embodiments, the second distance L2 between the second guide section 21212 and the impeller 221 satisfies: 4mm ≤ L2 ≤ 7mm.

[0063] L2≥4mm, that is, the minimum vertical distance between the second guide section 21212 and the impeller 221 is not less than 4mm. In this way, the drainage channel 23 formed by the second guide section 21212 has the necessary initial flow area, so that the liquid can enter smoothly and be constrained by the drainage channel 23, reducing the flow restriction of the liquid caused by the inlet end 231 of the drainage channel 23 being too small.

[0064] If L2≤7mm, the initial distance between the second guide section 21212 and the impeller 221 in the drainage channel 23 is limited, so that it forms an expansion relationship of L1>L2 with the distance L1 between the first guide section 21211. This helps the liquid to diffuse smoothly in the drainage channel 23 and provides a structural basis for subsequent centralized discharge to the drain port.

[0065] In some embodiments, the fan housing 21 further includes a grille portion 2122. The grille portion 2122 is connected to the guide portion 2121. There are multiple drain ports 21221, which are spaced apart on the grille portion 2122 along the circumference of the humidification device 1.

[0066] By setting up a grid section 2122 and arranging multiple circumferentially spaced drain ports 21221 on the grid section 2122, the liquid collected from the drain channel 23 can be dispersed and evenly distributed, and the liquid from the liquid inlet 101 and the drain channel 23 can drip or flow evenly from the multiple drain ports 21221 to the water tank 40 below.

[0067] like Figure 6 and Figure 8 As shown, in some embodiments, the fan assembly 20 further includes a baffle 21222.

[0068] A baffle 21222 is disposed on the grille section 2122. The impeller 221 has a wind-blocking end 2211 facing the grille section 2122. The top of the baffle 21222 is closer to the upper cover 10 than the wind-blocking end 2211 of the impeller 221. The wind-blocking end 2211 of the impeller 221 can be the lowest end of the impeller 221, that is, the end closer to the water tank 40. Figure 8 As shown, along the axial direction of the humidification device 1, the distance between the windproof end 2211 of the impeller 221 and the top end of the baffle 21222 is L3.

[0069] In this way, a narrow, tortuous airflow path is formed between the grille section 2122 and the rotating impeller 221. When the impeller 22 rotates, the baffle 21222 and the windproof end 2211 of the impeller 221 cooperate with each other to prevent the high-speed airflow inside the fan housing 21 from escaping upward and entering the drain channel 23 and the liquid inlet 101 area. The top of the baffle 21222 is higher than the windproof end 2211 of the impeller 221 (the end closer to the water tank 40), forming an "air seal" barrier, reducing the impact and interference of the upward airflow on the downward liquid, thereby allowing the liquid to fall smoothly by gravity, further reducing the noise and liquid splashing caused by the gas-liquid mixing flow.

[0070] like Figure 6 and Figure 8As shown, in some embodiments, the grille portion 2122 includes a plurality of vents communicating with the inner cavity of the fan housing 21. A baffle 21222 is located between the vents and the drain port 21221.

[0071] Thus, the baffle 21222 effectively prevents liquid falling from the drain port 21221 from splashing into or flowing towards the vent, preventing liquid from flowing back into the fan through the vent, thereby reducing the corrosion or operational interference caused by liquid on moving parts such as the impeller 22 and the motor. At the same time, the baffle 21222 is reused in the air seal structure, cooperating with the windproof end 2211 of the impeller 221 to suppress the upward dissipation of airflow inside the fan housing 21. In this way, the baffle 21222 has the dual functions of waterproofing and air sealing, simplifying the structure of the fan housing 21.

[0072] 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, include: The top cover is provided with a liquid inlet; A fan assembly includes a fan housing and an impeller rotatably disposed within the fan housing. The impeller includes an impeller disk. The fan housing includes a flow guide portion. A drain channel is formed between the impeller disk and the flow guide portion. The fan housing is provided with a drain port. The drain channel is connected to a liquid inlet and a drain port, respectively. In a predetermined cross-section along the fan assembly, the diameter ratio of the impeller disk to the flow guide portion is W, where W satisfies: 0.78 < W < 0.

88. A water tank is located on the side of the blower assembly opposite to the top cover, and the water tank is used to receive liquid flowing out from the drain channel.

2. The humidification device according to claim 1, characterized in that, The fan casing includes: The outer casing forms a receiving space, and the outer casing is connected to the upper cover and located on the side of the liquid inlet away from the central axis of the humidification device; A bottom shell, connected to the outer shell, the bottom shell including a flow guide portion inclined relative to the central axis and extending toward the upper cover, the flow guide portion forming the drainage channel with the impeller.

3. The humidification device according to claim 2, characterized in that, The impeller includes multiple blades, and the blade disk is connected to the outside of the multiple blades. The blade disk is inclined relative to the central axis and extends towards the upper cover. The connection between the guide section and the outer casing is higher than the free end of the impeller.

4. The humidification device according to claim 2, characterized in that, The flow guide includes a first flow guide section and a second flow guide section connected to each other. The second flow guide section is closer to the upper cover than the first flow guide section, and the first flow guide section is closer to the central axis than the second flow guide section. The connection between the second guide section and the first guide section forms a bend angle.

5. The humidification device according to claim 4, characterized in that, The first guide section is inclined relative to the central axis and extends towards the upper cover, and the second guide section is inclined relative to the central axis and extends towards the upper cover; Along the radial direction of the drainage channel, there is a first distance L1 between the first guide section and the impeller, and a second distance L2 between the second guide section and the impeller, where L1 > L2.

6. The humidification device according to claim 5, characterized in that, The first distance L1 between the first guide section and the impeller disk satisfies: 7mm < L1 ≤ 10mm; The second distance L2 between the second guide section and the impeller disk satisfies: 4mm ≤ L2 ≤ 7mm.

7. The humidifying device according to any one of claims 1 to 6, characterized in that, The fan housing also includes a grid section connected to the flow guide section, and there are multiple drain ports, which are spaced apart along the circumference of the humidification device on the grid section.

8. The humidification device according to claim 7, characterized in that, The wind turbine assembly also includes: A baffle is provided on the grille portion, the impeller has a windproof end facing the grille portion, and the top end of the baffle is closer to the top cover than the bottom end of the impeller.

9. The humidification device according to claim 8, characterized in that, The grille includes a plurality of vents communicating with the inner cavity of the fan housing, and the baffle is located between the vents and the drain outlet along the radial direction of the fan assembly.

10. The humidifying device according to any one of claims 1 to 6, characterized in that, The outlet area of ​​the drain channel is larger than the inlet area of ​​the drain channel.

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