An air humidifier

Abstract

The invention discloses an air humidifier, including a housing (1), on which an air inlet (11), an air outlet (12), and a mist outlet (13) are provided; the housing (1) also contains a water tank (2) and a base (3); the housing (1) contains an air duct (4) and a turbine fan (5); the base (3) contains an evaporative humidification mesh (6), an evaporative water tank (31), and a strip spray head (32); the base (3) also contains an atomizing water tank (33); the atomizing water tank (33) contains at least one ultrasonic atomizer (34); the base (3) contains a water column noise reduction component (7); the air humidifier of the present invention combines ultrasonic atomization humidification and evaporative humidification functions, and the water in the humidifier water tank is not easily spilled when the humidifier is shaken or tilted, and has the characteristics of low atomization noise.

Description

Technical Field

[0001] This invention relates to the field of humidifier technology, specifically an air humidifier. Background Technology

[0002] Existing air humidifiers commonly employ two humidification principles: ultrasonic atomization humidification and evaporative humidification. Evaporative humidification works by guiding airflow through a moisture-absorbing mesh, evaporating the absorbed moisture and releasing it into the indoor air, thus increasing humidity. During use, the evaporative humidification mesh needs timely replenishment; currently, it's typically partially submerged in an open water tank, where water easily spills when the humidifier is shaken or tilted. Atomization humidification uses an ultrasonic atomizer to disperse water in the tank into a mist, which is then released into the air to humidify it. However, as the power of the ultrasonic atomizer increases, the water is vibrated into a column during operation. Under gravity, this column disperses and falls back into the tank, producing significant noise. The splashing water droplets from the water column also contribute to the noise. Conversely, directly blocking the water column formation would severely reduce the amount of mist produced by the ultrasonic atomizer. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art: to provide an air humidifier with both ultrasonic atomization humidification and evaporative humidification functions, in which the water in the water tank is not easily spilled when the humidifier is shaken or tilted, and has the characteristics of low atomization noise.

[0004] The technical solution of the present invention is as follows: An air humidifier includes a housing, wherein the housing is provided with an air inlet, an air outlet, and a mist outlet; the housing is also provided with a water tank and a base; the housing is provided with an air duct communicating with the air outlet and a turbine fan driven by a motor located in the air duct; the base is provided with a rotatable cylindrical evaporative humidification net with its axis horizontally arranged; the base is provided with an evaporative water tank located below the evaporative humidification net; the base is provided with a strip-shaped spray head communicating with the evaporative water tank located below the evaporative humidification net; the base is also provided with an atomizing water tank; the atomizing water tank is provided with at least one ultrasonic atomizer; the atomizing water tank is connected to the water tank; the water tank is provided with an atomizing chamber communicating with the atomizing water tank; the atomizing chamber is located above the ultrasonic atomizer; the water tank is provided with a mist channel communicating with the mist outlet and the atomizing chamber; the base is provided with a water column noise reduction component located in the atomizing chamber; the water column noise reduction component is located above the ultrasonic atomizer.

[0005] As an optimization, the evaporative humidification mesh is provided with a toothed ring in the circumferential direction; the motor output shaft of the turbine fan is connected to the input shaft of the gearbox; the output shaft of the gearbox is provided with a gear that meshes with the toothed ring, for driving the evaporative humidification mesh to rotate.

[0006] As an optimization, the evaporation tank is provided with a water storage area, a water filtration area and a tank cover from bottom to top; the water storage area is provided with an inlet pipe that communicates with the water tank; the water storage area is also provided with an outlet pipe; the outlet pipe is connected to the strip spray head through a water pump; the water filtration area is provided with a filter cotton that completely covers the inlet of the water storage area and has an inlet.

[0007] As an optimization, the water level in the evaporation tank is not greater than the depth of the water storage area; the water inlet of the tank cover is located in the middle, and the tank cover has a sealing edge around the water inlet; the water volume in the water storage area is less than the volume formed by the sealing edge and the filtration area when the water is poured out.

[0008] As an optimization, the water column noise reduction assembly includes a circular base plate, a middle cylinder, and a top cover; the middle cylinder is sleeved on the circular base plate, and the top cover is coaxially disposed at the upper end of the middle cylinder; the circular base plate is provided with a water column guide tube communicating with the interior of the middle cylinder; the upper surface of the circular base plate is provided with an annular array of spikes surrounding the water column guide tube; the circular base plate is provided with a plurality of drain ports; the inner wall of the middle cylinder is uniformly provided with noise reduction guide ribs around its axis; the noise reduction guide ribs are vertically distributed and have cutting edges facing the axis of the middle cylinder; the top of the top cover is provided with a mist outlet hole coaxial with the water column guide tube; the top cover is uniformly provided with arc-shaped noise reduction ribs around the axis of the mist outlet hole; the water column guide tube is coaxially disposed above the ultrasonic atomizer.

[0009] As an optimization, the drain outlet is arranged horizontally in the opening direction inside the middle cylinder; the arc-shaped noise reduction rib has a cutting edge facing the axis of the top cover; there is a gap between adjacent arc-shaped noise reduction ribs on the top cover.

[0010] As an optimization, the water tank includes a removable water tank cover; the water tank cover is provided with a water inlet, and the inner end of the water inlet is provided with an overflow valve; the overflow valve includes a movable valve core and a guide base; the movable valve core is in the shape of an inverted frustum and is disposed in the cavity of the guide base; the cavity of the guide base is provided with a plurality of guide ribs that slide in cooperation with the side wall of the movable valve core, for guiding the movable valve core to the upper end face of the movable valve core to close the water inlet when the water tank is tilted; there is a gap between adjacent guide ribs that connects the cavity of the guide base and the interior of the water tank.

[0011] As an optimization, when the water tank is in a vertical position, there is a gap between the upper end face of the movable valve core and the inner end face of the water inlet; when the water tank is in a tilted position, the upper end face of the movable valve core is in contact with the inner end face of the water inlet.

[0012] As an optimization, the upper end face of the guide rib mates with the side wall of the movable valve core, and the upper end face of the guide rib has an angle with the horizontal plane; there is a gap between the side wall of the movable valve core and the inner wall of the cavity of the guide base.

[0013] As an optimization, the base is equipped with a fan, the air inlet of which is connected to the atmosphere and the air outlet of which is connected to the atomizing chamber.

[0014] The beneficial effects of the present invention are as follows: The air humidifier of the present invention combines the functions of ultrasonic atomization humidification and evaporative humidification, and the water in the humidifier water tank is not easily spilled when the humidifier is shaken or tilted, and it has the characteristics of low atomization noise. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the air humidifier in the embodiment.

[0016] Figure 2 This is a schematic diagram of the exploded structure of the air humidifier in the embodiment.

[0017] Figure 3 This is a cross-sectional view of the air humidifier in the embodiment.

[0018] Figure 4 This is a cross-sectional perspective view of the air humidifier in the embodiment.

[0019] Figure 5 This is a cross-sectional view of the air humidifier in the embodiment.

[0020] Figure 6 This is a schematic diagram of the exploded structure of the base and humidification net of the air humidifier in the embodiment.

[0021] Figure 7 This is a schematic diagram of the exploded structure of the water column noise reduction component of the air humidifier in the embodiment.

[0022] Figure 8 This is a cross-sectional three-dimensional structural diagram of the water column noise reduction component of the air humidifier in the embodiment.

[0023] Figure 9 This is a schematic diagram of the exploded structure of the water tank cover of the air humidifier in the embodiment.

[0024] Figure 10 This is a partial cross-sectional view of the water tank of the air humidifier in the embodiment.

[0025] Figure 11 This is a partial cross-sectional view of the water tank of the air humidifier in the embodiment after it has been tilted over.

[0026] In the diagram: 1. Shell; 11. Air inlet; 12. Air outlet; 13. Mist outlet; 2. Water tank; 21. Atomizing chamber; 22. Mist channel; 23. Water inlet; 24. Annular groove; 3. Base; 31. Evaporation water tank; 311. Water storage area; 312. Water filtration area; 313. Water tank cover; 314. Water inlet pipe; 315. Water outlet pipe; 316. Filter cotton; 32. Strip spray head; 33. Atomizing water tank; 34. Ultrasonic atomizer; 4. Air duct; 5. Turbine fan; 51. Gearbox; 6. Evaporative humidification mesh; 61. Gear ring; 7. Water column noise reduction assembly; 71. Circular base plate; 72. Middle cylinder; 73. Top cover; 74. Water column duct; 75. Annular spike array; 76. Drain outlet; 77. Noise reduction guide rib; 78. Mist outlet; 79. Arc-shaped noise reduction rib; 8. Anti-overflow valve; 81. Movable valve core; 82. Guide base; 9. Fan. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to specific embodiments, but the present invention is not limited to the following specific embodiments.

[0028] Example

[0029] like Figure 1-11 As shown, this embodiment provides an air humidifier, including a housing 1, on which an air inlet 11, an air outlet 12, and a mist outlet 13 are provided; the housing 1 also contains a water tank 2 and a base 3.

[0030] The housing 1 is provided with an air duct 4 that communicates with the air outlet 12 and a turbine fan 5 driven by a motor located in the air duct 4.

[0031] The base 3 is provided with a rotatable cylindrical evaporative humidification mesh 6 with its axis horizontally arranged;

[0032] The base 3 is provided with a bearing to support the evaporative humidification mesh 6; the two ends of the evaporative humidification mesh 6 are provided with rotating shafts that cooperate with the bearing.

[0033] The evaporative humidification mesh 6 is provided with a toothed ring 61 around its circumference; the motor output shaft of the turbine fan 5 is connected to the input shaft of the reduction gearbox 51; the output shaft of the reduction gearbox 51 is provided with a gear that meshes with the toothed ring 61, for driving the evaporative humidification mesh 6 to rotate.

[0034] The two ends of the evaporative humidification mesh 6 are directly opposite the air inlet 11.

[0035] An evaporation water tank 31 is provided on the base 3 below the evaporation humidification net 6;

[0036] The base 3 is provided with a strip spray head 32 that communicates with the evaporation water tank 31 below the evaporation humidification net 6;

[0037] The axis of the strip spray head 32 is parallel to the axis of the evaporative humidification net 6.

[0038] The evaporation tank 31 is provided with a water storage area 311, a water filtration area 312 and a tank cover 313 from bottom to top.

[0039] The water storage area 311 is provided with an inlet pipe 314 that is connected to the water tank 2 via a solenoid valve to replenish the water in the water storage area 311.

[0040] The water storage area 311 is also equipped with a water outlet pipe 315. The water outlet pipe 315 is connected to the strip spray head 32 via a water pump. The spray holes of the strip spray head 32 face the side of the evaporative humidification net 6. By controlling the water pump, water can be added to the evaporative humidification net 6. While the evaporative humidification net 6 is being added water, it can rotate and add water simultaneously due to the drive of the reduction gearbox 51, achieving a uniform water replenishment effect.

[0041] The filtration zone 312 is provided with filter cotton 316 that completely covers the inlet of the water storage zone 311.

[0042] The water tank cover 313 is provided with a water inlet. The return water after the strip spray head 32 sprays the evaporative humidification net 6 enters the water inlet, and then passes through the filter cotton 316 before entering the water storage area 311 for use by the strip spray head 32. This prevents impurities and dust from clogging the pores of the evaporative humidification net 6 and affecting its air permeability. The filtered water sprayed onto the evaporative humidification net 6 also has the function of cleaning the evaporative humidification net 6 and extending its service life.

[0043] The water level in the evaporation tank 31 is not greater than the depth of the water storage area 311.

[0044] The water inlet of the water tank cover 313 is located in the middle, and the water tank cover 313 has a sealing edge around the water inlet; the water volume in the water storage area 311 is less than the spatial volume formed by the sealing edge and the water filtration area 312. The width of the sealing edge is determined according to requirements, ensuring that when the humidifier is tilted, the volume formed by the sealing edge and the water filter area 312 can completely accommodate all the overflowing water in the water storage area 311. In other words, by controlling the volume of the water storage area 311 to be smaller than the volume formed by the sealing edge and the water filter area 312 after the humidifier is tilted, and then controlling the water level in the water storage area 311 to not exceed its volume, even if all the water in the water storage area 311 overflows into the space formed by the sealing edge and the water filter area 312 after the humidifier is tilted, it will not flow from the water inlet of the water tank cover 313 to the outside of the evaporation water tank 31. This achieves the technical effect that water in the evaporation water tank 31 is not easily spilled when the humidifier is shaken or tilted. The sealing edge refers to the area on the water tank cover 313 between the side wall of the water inlet and the side wall of the water tank cover 313.

[0045] The entire evaporative humidification net 6 is located above the evaporative water tank 31, with no part submerged in water. Therefore, the evaporative humidification net 6 has high evaporation efficiency and a large effective evaporation area.

[0046] The base 3 is also provided with an atomizing water tank 33; the atomizing water tank 33 is provided with two ultrasonic atomizers 34; the atomizing water tank 33 is connected to the water tank 2 through a solenoid valve; the water tank 2 is provided with an atomizing chamber 21 connected to the atomizing water tank 33; the atomizing chamber 21 is located above the ultrasonic atomizers 34.

[0047] The water tank 2 is provided with a mist channel 22 that connects the mist outlet 13 and the atomizing chamber 21;

[0048] Optionally, an automatically opening and closing connecting channel can be provided between the mist channel 22 and the air duct 4.

[0049] A water column noise reduction assembly 7 is provided on the base 3 within the atomizing chamber 21; in this embodiment, two water column noise reduction assemblies 7 are provided; the water column noise reduction assembly 7 is located above the ultrasonic atomizer 34; the water column noise reduction assembly 7 includes a circular base plate 71, a middle cylinder 72, and a top cover 73; the middle cylinder 72 is sleeved on the circular base plate 71, and the top cover 73 is coaxially located at the upper end of the middle cylinder 72; a water column conduit 74 communicating with the interior of the middle cylinder 72 is provided on the circular base plate 71; the upper surface of the circular base plate 71 is surrounded by... The water column guide tube 74 is provided with an annular spike array 75; the circular base plate 71 is provided with a plurality of drain ports 76; the inner wall of the middle cylinder 72 is provided with noise reduction and flow guiding ribs 77 evenly arranged around its axis; the noise reduction and flow guiding ribs 77 are vertically distributed and have cutting edges facing the axis of the middle cylinder 72; the top of the top cover 73 is provided with a mist outlet 78 coaxial with the water column guide tube 74; the top cover 73 is provided with arc-shaped noise reduction ribs 79 evenly arranged around the axis of the mist outlet 78; the water column guide tube 74 is coaxially arranged above the ultrasonic atomizer 34.

[0050] The lengths of the spikes in the annular spike array 75 are normally distributed along the edge of the circular base plate 71 and the water column conduit 74, with the longest spikes located between the edge of the circular base plate 71 and the water column conduit 74, and shorter spikes closer to the edge of the circular base plate 71 or the water column conduit 74. This design effectively guides the water flow, thereby reducing noise during dripping. Specifically, each spike is a cylinder with a conical tip.

[0051] The drain outlet 76 is located inside the middle cylinder 72 and is arranged horizontally in the opening direction. This arrangement prevents water droplets from falling back onto the liquid surface and causing dripping noise. In this embodiment, the drain outlet 76 is located around the water column guide tube 74 at the edge of the circular base plate 71.

[0052] The outer wall of the middle cylinder 72 is uniformly provided with vertical guide grooves around its axis. These grooves guide the liquid droplets that fall back from the outside.

[0053] The arc-shaped noise-reducing rib 79 has a cutting edge facing the axis of the top cover 73, with a cutting edge angle of 10-45°. The middle cylinder 72 can prevent water droplets from splashing, and the noise-reducing guide rib 77 with a cutting edge can effectively guide splashing water droplets. Furthermore, droplets that splash directly onto the inner wall of the middle cylinder 72 are guided by the cutting edge, which can reduce the noise generated by the droplets hitting the inner wall head-on.

[0054] There are gaps between adjacent arc-shaped noise-reducing ribs 79 on the top cover 73. The outer contour of the top cover 73 is hemispherical. The gaps allow the ultrasonic atomized mist to pass through, but some water droplets will be blocked by the arc-shaped noise-reducing ribs 79. The arc-shaped noise-reducing ribs 79 have a triangular cross-section, which helps to increase the contact area of ​​the water droplets and allow them to slide down the wall.

[0055] The mist outlet 78 avoids restricting the water column body and prevents direct impact on the end of the water column, thus avoiding affecting the atomization amount of the atomizing plate.

[0056] The arc-shaped noise-reducing rib 79 can cut and guide the dispersed droplets at the end of the water column to flow back along the inner and outer walls of the middle cylinder 72, avoiding droplets hitting the inner wall of the atomizing chamber and causing greater noise.

[0057] In this embodiment, a circular pressure plate is fitted onto the water column conduit 74. The circular pressure plate is coaxially arranged with the water column conduit 74 and has an opening facing the drain outlet 76 for leaking backflow water. The circular pressure plate can float up and down along the water column conduit 74 to block water splashes in areas other than the water column generated by the ultrasonic atomizer 34, further reducing noise sources.

[0058] The water tank 2 includes a detachable water tank cover; the water tank cover is provided with a water inlet 23, and the inner end of the water inlet 23 is provided with an anti-overflow valve 8.

[0059] The anti-overflow valve 8 includes a movable valve core 81 and a guide base 82;

[0060] The movable valve core 81 is in the shape of an inverted frustum and is disposed in the cavity of the guide base 82. The cavity of the guide base 82 is provided with eight guide ribs that slide in cooperation with the side wall of the movable valve core 81, which are used to guide the movable valve core 81 to the upper end face of the movable valve core 81 to close the water inlet 23 when the water tank is tilted. There is a gap between adjacent guide ribs that connects the cavity of the guide base 82 and the interior of the water tank 2.

[0061] When the water tank 2 is in a vertical position, there is a gap between the upper end face of the movable valve core 81 and the inner end face of the water inlet 23; when the water tank 2 is in a tilted position, the upper end face of the movable valve core 81 is in contact with the inner end face of the water inlet 23. The cavity cross-section of the guide base 82 is circular, and the guide ribs extend radially along the cavity, with a plurality of guide ribs evenly distributed around the axis of the cavity.

[0062] The upper end face of the guide rib mates with the side wall of the movable valve core 81, and the upper end face of the guide rib has an angle with the horizontal plane. The upper surface of the movable valve core 81 is circular, and when it is in any posture and is in contact with the inner end face of the water inlet 23, the upper surface of the movable valve core 81 can completely cover the water inlet 23.

[0063] The inner end face of the water inlet 23 is provided with several annular grooves 24 coaxial with it. The annular grooves 24 can enhance the sealing performance of the movable valve core 81 against the inner end face of the water inlet 23. To further improve the sealing performance, the movable valve core 81 is made of silicone or rubber.

[0064] There is a gap between the side wall of the movable valve core 81 and the inner wall of the cavity of the guide base 82.

[0065] like Figure 10-11 As shown, the air humidifier of this embodiment can achieve the following regardless of which direction it is tilted: the guide ribs guide the movable valve core 81 to its upper end face to seal the water inlet 23. The upper end face of the movable valve core 81 fits against the inner end face of the water inlet 23, and the water pressure enhances the seal, effectively preventing water overflow. This is because the movable valve core 81 is in the shape of an inverted frustum, and the guide ribs are evenly distributed around the conical sidewall of the movable valve core 81. When the humidifier is in a vertical position, the movable valve core 81 slides into the bottom of the guide ribs due to gravity, and there is a large gap between the upper end face of the movable valve core 81 and the inner end face of the water inlet 23; water can be directly injected through the water inlet 23, thus facilitating water refilling at any time while effectively solving the problem of large amounts of water overflowing after the humidifier is accidentally tilted.

[0066] The base 3 is equipped with a fan 9, the air inlet of which is connected to the atmosphere and the air outlet of which is connected to the atomizing chamber 21. The fan 9 can accelerate the discharge of mist from the mist outlet 13 to improve humidification efficiency.

[0067] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0068] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0069] The above are merely exemplary embodiments of the present invention and do not constitute any limitation on the scope of protection of the present invention. All technical solutions formed by equivalent exchange or substitution fall within the scope of protection of the present invention.

Claims

1. An air humidifier, comprising a housing (1), wherein the housing (1) is provided with an air inlet (11), an air outlet (12), and a mist outlet (13); the housing (1) further comprises a water tank (2) and a base (3); characterized in that, The housing (1) is provided with an air duct (4) communicating with the air outlet (12) and a turbine fan (5) driven by a motor located in the air duct (4); the base (3) is provided with a rotatable cylindrical evaporative humidification net (6) with its axis horizontally arranged; the base (3) is provided with an evaporative water tank (31) located below the evaporative humidification net (6); the base (3) is provided with a strip-shaped spray head (32) communicating with the evaporative water tank (31) located below the evaporative humidification net (6); the base (3) The base (3) is also provided with an atomizing water tank (33); the atomizing water tank (33) is provided with at least one ultrasonic atomizer (34); the atomizing water tank (33) is connected to the water tank (2); the water tank (2) is provided with an atomizing chamber (21) connected to the atomizing water tank (33); the atomizing chamber (21) is located above the ultrasonic atomizer (34); the water tank (2) is provided with a mist channel (22) connecting the mist outlet (13) and the atomizing chamber (21); the base (3) is located on the mist outlet (13) of the water tank (23). A water column noise reduction component (7) is provided inside the evaporation chamber (21); the water column noise reduction component (7) is located above the ultrasonic atomizer (34); the evaporation tank (31) is provided with a water storage area (311), a water filtration area (312) and a tank cover (313) from bottom to top; the water storage area (311) is provided with an inlet pipe (314) that communicates with the water tank (2); the water storage area (311) is also provided with an outlet pipe (315); the outlet pipe (315) is connected to the strip spray head (32) through a water pump. The filtration area (312) is provided with filter cotton (316) that completely covers the inlet of the water storage area (311); the water tank cover (313) is provided with a water inlet; the water supply level in the evaporation tank (31) is not greater than the depth of the water storage area (311); the water inlet of the water tank cover (313) is located in the middle, and the water tank cover (313) has a sealing edge around the water inlet; the water volume in the water storage area (311) is less than the volume formed by the sealing edge and the filtration area (312) when it is poured.

2. The air humidifier according to claim 1, characterized in that, The evaporative humidification mesh (6) is provided with a toothed ring (61) in the circumferential direction; the motor output shaft of the turbine fan (5) is connected to the input shaft of the gearbox (51); the output shaft of the gearbox (51) is provided with a gear that meshes with the toothed ring (61) to drive the evaporative humidification mesh (6) to rotate.

3. The air humidifier according to claim 1, characterized in that, The water column noise reduction assembly (7) includes a circular base plate (71), a middle cylinder (72), and a top cover (73); the middle cylinder (72) is sleeved on the circular base plate (71), and the top cover (73) is coaxially disposed at the upper end of the middle cylinder (72); the circular base plate (71) is provided with a water column conduit (74) communicating with the interior of the middle cylinder (72); the upper surface of the circular base plate (71) is provided with an annular spike array (75) surrounding the water column conduit (74); the circular base plate (71) is provided with a plurality of Drain (76); Noise-reducing guide ribs (77) are evenly arranged around the inner wall of the middle cylinder (72) along its axis; The noise-reducing guide ribs (77) are vertically distributed and have a cutting edge facing the axis of the middle cylinder (72); The top of the top cover (73) is provided with a mist outlet (78) coaxial with the water column guide tube (74); Arc-shaped noise-reducing ribs (79) are evenly arranged around the axis of the mist outlet (78) on the top cover (73); The water column guide tube (74) is coaxially arranged above the ultrasonic atomizer (34).

4. The air humidifier according to claim 3, characterized in that, The drain outlet (76) is horizontally arranged in the opening direction inside the middle cylinder (72); the arc-shaped noise reduction rib (79) has a cutting edge facing the axis of the top cover (73); there is a gap between adjacent arc-shaped noise reduction ribs (79) on the top cover (73).

5. The air humidifier according to claim 1, characterized in that, The water tank (2) includes a detachable water tank cover; the water tank cover is provided with a water inlet (23), and the inner end of the water inlet (23) is provided with an overflow valve (8); the overflow valve (8) includes a movable valve core (81) and a guide base (82); the movable valve core (81) is in the shape of an inverted frustum and is located in the cavity of the guide base (82); the cavity of the guide base (82) is provided with a plurality of guide ribs that slide in cooperation with the side wall of the movable valve core (81), which are used to guide the movable valve core (81) to the upper end face of the movable valve core (81) to close the water inlet (23) when the water tank is tilted; there is a gap between adjacent guide ribs that connects the cavity of the guide base (82) and the interior of the water tank (2).

6. The air humidifier according to claim 5, characterized in that, When the water tank (2) is in a vertical position, there is a gap between the upper end face of the movable valve core (81) and the inner end face of the water inlet (23); when the water tank (2) is in a tilted position, the upper end face of the movable valve core (81) is in contact with the inner end face of the water inlet (23).

7. The air humidifier according to claim 6, characterized in that, The upper end face of the guide rib engages with the side wall of the movable valve core (81).

8. The air humidifier according to claim 7, characterized in that, The upper end face of the guide rib has an angle with the horizontal plane.

9. The air humidifier according to claim 8, characterized in that, There is a gap between the side wall of the movable valve core (81) and the inner wall of the cavity of the guide base (82).

10. The air humidifier according to claim 1, characterized in that, The base (3) is equipped with a fan (9), the air inlet of the fan (9) is connected to the atmosphere, and the air outlet is connected to the atomizing chamber (21).

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