Air duct structure and humidifier

Abstract

The present invention discloses an air duct structure and a humidifier, the air duct structure comprises an air duct body, a shielding member and a switch member, the air duct body is provided with an air duct, the air duct is formed with an air outlet, an air inlet and a drain; the shielding member is arranged in the air duct, the shielding member is arranged at a distance from the air inlet and the shielding member is arranged to shield the air inlet; the switch member is connected to the air duct body, the switch member has a first working state of opening the drain when subjected to an external force and a second working state of closing the drain when the external force is removed. The air duct structure and the humidifier can prevent water from entering the fan when in use, thereby protecting the fan from damage.

Description

Technical Field

[0001] The present invention relates to the technical field of humidification equipment, and in particular to an air duct structure and a humidifier. Background Art

[0002] Ultrasonic humidifiers mainly use high-frequency vibrations, and then through the high-frequency vibration of the atomizer, the water in the humidifier is thrown off the water surface to produce floating mist, thereby achieving the purpose of air humidification. In general ultrasonic humidifiers, the fan is installed below the air duct outlet, and the generated mist is discharged through the fan, so the reliability of the fan is very important.

[0003] However, when using a conventional ultrasonic humidifier, water or mist often flows back into the air duct, thereby causing damage to the fan and affecting the normal use of the ultrasonic humidifier. Summary of the invention

[0004] Based on this, in order to address the problem that when using a traditional ultrasonic humidifier, water or mist often flows back into the air duct, thereby causing damage to the fan and affecting the normal use of the ultrasonic humidifier, an air duct structure and a humidifier are proposed. The air duct structure and the humidifier can prevent water from entering the fan when in use, thereby protecting the fan from damage.

[0005] The specific technical solutions are as follows:

[0006] On the one hand, the present application relates to an air duct structure, including an air duct body, a shielding member and a switch member, the air duct body is provided with an air duct, and the air duct is formed with an air outlet, an air inlet and a drain outlet; the shielding member is arranged in the air duct, the shielding member is spaced apart from the air inlet and the shielding member is arranged to shield the air inlet; the switch member is connected to the air duct body, and the switch member has a first working state of opening the drain outlet when subjected to external force and a second working state of closing the drain outlet when the external force is removed.

[0007] When the above-mentioned air duct structure is in use, humidified air can enter the air duct along the air inlet of the air duct and be discharged along the air outlet; when the user accidentally pours water into the air duct or fog enters the air duct along the air outlet, since the shielding member is spaced apart from the air inlet and the shielding member is configured to shield the air inlet, the water entering the air duct will not enter the air inlet, thereby not causing damage to the fan arranged at the air inlet; further, when water hitting the shielding member falls on the switch member or when water poured into the air duct falls on the switch member, the water will exert an external force on the switch member, and at this time the switch member will open the drain port under the external force to discharge the water; when the water is drained, the external force is removed, and the switch member closes the drain port, thereby realizing the drainage function; further, when the water is drained, the switch member closes the drain port, thereby reducing the wind loss of the fan.

[0008] The technical solution is further described below:

[0009] In one of the embodiments, the air duct body is further provided with a partition, the partition is arranged in the air duct, and the air inlet and the drain outlet are separated by the partition.

[0010] In one embodiment, the switch member is a first elastic member, and one end of the switch member is fixed to the partition;

[0011] When the switch element is in the first working state, the other end of the switch element is bent and deformed by an external force and opens the drain port;

[0012] When the switch element is in the second working state, the other end of the switch element recovers its deformation and contacts and cooperates with the side wall of the air duct to close the drain port.

[0013] In one embodiment, the switch element is a silicone sheet.

[0014] In one embodiment, the shielding member includes a first end and a second end relative to each other, the first end is fixed to the inner wall of the air duct, the shielding member is inclined relative to the air duct and the second end is closer to the drain outlet than the first end to guide water in a direction toward the drain outlet.

[0015] In one of the embodiments, a side wall of the shielding member facing the air outlet is provided with a guide groove for guiding water to the drain outlet.

[0016] In one embodiment, the switch element is rotatably disposed in the air duct;

[0017] When the switch element is in the first working state, the switch element is subjected to an external force and rotates relative to the air duct to open the drain port;

[0018] When the switch element is in the second working state, the external force is removed and the switch element rotates relative to the air duct to close the drain port.

[0019] In one embodiment, the air duct structure further includes a second elastic member and a support member, the air duct includes a third end and a fourth end opposite to each other, the third end is provided with the air outlet, the fourth end is provided with the air inlet and the drain, the support member is arranged at the end of the fourth end, one end of the switch member is connected to the end of the fourth end through the second elastic member, and the other end of the switch member is rotatably arranged on the support member;

[0020] When the switch member is in the first working state, the other end of the switch member is subjected to an external force and overcomes the elastic force of the second elastic member to rotate relative to the support member to open the drain port;

[0021] When the switch element is in the second working state, the second elastic element recovers its deformation and drives the other end of the switch element to rotate to close the drain port.

[0022] In one of the embodiments, the air inlet and the drain outlet are both located on a side opposite to the air outlet, and the drain outlet is arranged opposite to the air outlet.

[0023] In one embodiment, the air duct includes a first section and a second section connected to the first section, the first section is provided with the air outlet, the second end is provided with the air inlet and the drain outlet, and the cross-sectional area of ​​the second section is larger than the cross-sectional area of ​​the first section.

[0024] In one of the embodiments, the shielding member is connected to a side wall of the second section close to the air inlet, and an orthographic projection of the shielding member falls into the drain outlet.

[0025] In one embodiment, a blocking portion is provided on the inner wall of the air duct, and the blocking portion is spaced apart from the partition portion. When the switch element is in the second working state, the external force is removed and the other end of the switch element contacts and cooperates with the blocking portion to close the drain outlet; when the switch element is in the first working state, the other end of the switch element is separated from the blocking portion under the action of the external force to open the drain outlet.

[0026] In one of the embodiments, the blocking portion is closer to the air outlet than the switch element, and when the switch element is in the second working state, the other end of the switch element contacts and cooperates with the bottom of the blocking portion and partially overlaps.

[0027] On the other hand, the present application also relates to a humidifier, comprising the air duct structure in any of the above embodiments.

[0028] When the above-mentioned humidifier is in use, humidified air can enter the air duct along the air inlet of the air duct and be discharged along the air outlet; when the user accidentally pours water into the air duct or fog enters the air duct along the air outlet, since the shielding member is spaced apart from the air inlet and the shielding member is configured to shield the air inlet, the water entering the air duct will not enter the air inlet, thereby not causing damage to the fan arranged at the air inlet; further, when water hitting the shielding member falls on the switch member or water poured into the air duct falls on the switch member, the water will exert an external force on the switch member, and at this time the switch member will open the drain port under the external force to discharge the water; when the water is drained, the external force is removed, and the switch member closes the drain port, thereby realizing the drainage function; further, when the water is drained, the switch member closes the drain port, thereby reducing the wind loss of the fan.

[0029] In one embodiment, the humidifier further includes a fan, and an air outlet of the fan is connected to the air inlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and the description thereof are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings used in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0032] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of various elements are drawn only as examples in the drawings and are not necessarily drawn according to the true scale.

[0033] Figure 1 is a structural schematic diagram of a humidifier when the switch element is in a first working state in one embodiment;

[0034] Figure 2 is a structural schematic diagram of a humidifier when the switch element is in the second working state in one embodiment;

[0035] Figure 3 for Figure 1 A is a partial enlarged schematic diagram;

[0036] Figure 4 for Figure 2 A partial enlarged schematic diagram of B in the figure.

[0037] Description of reference numerals:

[0038] 10. Humidifier; 20. Air duct structure; 30. Fan; 100. Air duct body; 110. Air duct; 112. Air inlet; 114. Air outlet; 116. Drain; 118. Blocking part; 120. Partition; 130. First section; 140. Second section; 200. Shielding member; 210. First end; 220. Second end; 300. Switch member. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0042] Please refer to Figure 1 and Figure 2 As shown, a humidifier 10 in one embodiment includes a fan 30 and an air duct structure 20, wherein the air duct structure 20 includes an air duct body 100, wherein the air duct body 100 is provided with an air duct 110, wherein the air duct 110 is formed with an air outlet 114 and an air inlet 112, and an air outlet portion of the fan 30 is connected to the air inlet 112 to transport the humidified air to the air duct 110 and discharge it through the air outlet 114.

[0043] Please refer to Figure 1 and Figure 2As shown, further, the air duct structure 20 also includes a shielding member 200 and a switch member 300, the air duct 110 is formed with an air outlet 114, and an air inlet 112 and a drain port 116 opposite to the air outlet 114, the shielding member 200 is arranged in the air duct 110, the shielding member 200 is spaced apart from the air inlet 112 and the shielding member 200 is arranged to shield the air inlet 112, please refer to Figure 3 and Figure 4 The switch member 300 is connected to the air duct body 100, and the switch member 300 has a first working state of opening the drain port 116 when an external force is applied and a second working state of closing the drain port 116 when the external force is removed.

[0044] When the air duct structure 20 is in use, the humidified air can enter the air duct 110 along the air inlet 112 of the air duct 110 and be discharged along the air outlet 114. When the user accidentally pours water into the air duct 110 or mist enters the air duct 110 along the air outlet 114, since the shielding member 200 is spaced apart from the air inlet 112 and the shielding member 200 is configured to shield the air inlet 112, the water entering the air duct 110 will not enter the air inlet 112, and will not cause damage to the fan 30 disposed at the air inlet 112. further, when water hitting the shielding member 200 falls on the switch member 300 or water poured into the air duct 110 falls on the switch member 300, the water will exert an external force on the switch member 300. At this time, the switch member 300 opens the drain port 116 under the external force to discharge the water; when the water is drained, the external force is removed, and the switch member 300 closes the drain port 116, thereby realizing the drainage function; further, when the water is drained, the switch member 300 closes the drain port 116, so that the wind loss of the fan 30 can be reduced.

[0045] Please refer to Figure 1 The air inlet 112 and the drain outlet 116 are both located on the side opposite to the air outlet 114, and the drain outlet 116 is arranged opposite to the air outlet 114. In this way, when water hitting the shielding member 200 falls on the switch member 300 or when water poured into the air duct 110 falls on the switch member 300, the water will exert an external force on the switch member 300, and the switch member 300 will open the drain outlet 116 under the external force.

[0046] Please refer to Figure 1 In one embodiment, the air duct 110 includes a first section 130 and a second section 140 connected to the first section 130. The first section 130 is provided with an air outlet 114, and the second section 140 is provided with an air inlet 112 and a drain 116. The cross-sectional area of ​​the second section 140 is greater than the cross-sectional area of ​​the first section 130. In this way, the airflow in the air duct 110 is concentrated to flow to the air outlet 114.

[0047] Furthermore, the shielding member 200 is connected to the side wall of the second section 140 close to the air inlet 112, and the orthographic projection of the shielding member 200 falls into the drain outlet 116. In this way, the shielding member 200 can shield the air inlet 112 more reliably.

[0048] Specifically, the shielding member 200 is configured to shield the air inlet 112 in the flow direction of the air duct 110. The flow direction of the air duct 110 refers to the conduction direction of the air duct 110 (see Figure 1 As indicated by the arrow in the figure, the shielding member 200 is arranged to shield the air inlet 112 in the flow direction of the air duct 110 in order to prevent water from directly falling into the air inlet 112 when entering the air duct 110 along the air outlet 114, thereby protecting the fan 30.

[0049] Please refer to Figure 1 The shielding member 200 includes a first end 210 and a second end 220 opposite to each other. The first end 210 is fixed to the inner wall of the air duct 110. The shielding member 200 is tilted relative to the air duct 110 and the second end 220 is closer to the drain port 116 than the first end 210 to guide the water in the direction of the drain port 116. In this way, the shielding member 200 can play a guiding role. When water enters the air duct 110 along the air outlet 114 and falls on the shielding member 200, the water can be guided in the direction of the drain port 116 through the shielding member 200.

[0050] Specifically, in order to enable the shielding member 200 to guide water in the direction toward the drain outlet 116, the second end 220 may be oriented toward the drain outlet 116 or the orthographic projection of the shielding member 200 may fall at the drain outlet 116. In other words, the space in the air duct 110 that vertically falls into the drain outlet 116 is defined as a vertical space, and the length of the shielding member 200 is set to be long enough to allow the shielding member 200 to extend into the vertical space. In other embodiments, the shielding member 200, under the premise of ensuring that the air inlet 112 is shielded, the second end 220 may be oriented toward the vertical space, so that the shielding member 200 guides water in the direction toward the drain outlet 116.

[0051] Furthermore, a guide groove for guiding water to the drain port 116 is provided on the side wall of the shielding member 200 facing the air outlet 114. In this way, the water is guided in the direction toward the drain port 116 through the guide groove.

[0052] Please refer to Figure 3 and Figure 4 The air duct body 100 is further provided with a partition 120, which is arranged in the air duct 110, and the air inlet 112 and the drain port 116 are separated by the partition 120. Specifically, the partition 120 can be integrally formed with the air duct 110, or can be fixed inside the air duct 110 by welding or other connection methods.

[0053] Specifically, in one embodiment, the switch member 300 is a first elastic member, and one end of the switch member 300 is fixed to the partition 120;

[0054] Please refer to Figure 3 When the switch component 300 is in the first working state, the other end of the switch component 300 is bent and deformed by the external force and opens the drain port 116; in this way, when in use, when water hitting the shielding member 200 falls on the switch component 300 or when water poured into the air duct 110 falls on the switch component 300, the water will exert an external force on the switch component 300 to deform the switch component 300, thereby opening the drain port 116 to discharge the water.

[0055] Please refer to Figure 4 When the switch member 300 is in the second working state, the other end of the switch member 300 recovers its deformation and contacts the side wall of the air duct 110 to close the drain port 116. In this way, when the water is drained, the external force is removed, and the switch member 300 recovers its deformation and contacts the side wall of the air duct 110 to close the drain port 116. Then, when the fan 30 is running, the drain port 116 is in a closed state, which can reduce the wind loss of the fan 30.

[0056] Specifically, the switch element 300 is a silicone sheet, and thus the elastic properties of the silicone sheet are utilized to achieve the above two working states.

[0057] In another embodiment, the switch member 300 is rotatably disposed in the air duct 110;

[0058] When the switch component 300 is in the first working state, the switch component 300 is subjected to external force and rotates relative to the air duct 110 to open the drain port 116; in this way, when in use, when water hitting the shielding component 200 falls on the switch component 300 or when water poured into the air duct 110 falls on the switch component 300, the water will exert external force on the switch component 300 to rotate the switch component 300, thereby opening the drain port 116 and draining the water.

[0059] When the switch 300 is in the second working state, the external force is removed and the switch 300 rotates relative to the air duct 110 to close the drain port 116. In this way, when the water is drained, the external force is removed, and the switch 300 rotates to contact and cooperate with the side wall of the air duct 110 and close the drain port 116, so that the drain port 116 is in a closed state when the fan 30 is running, which can reduce the wind loss of the fan 30.

[0060] Specifically, the switch member 300 includes a rotating body, a motor and a pressure sensor. The motor is arranged in the partition 120 and connected to the rotating body to drive the rotating body to rotate. The pressure sensor is arranged on the pressure-bearing surface of the rotating body. When the pressure sensor detects that the rotating body is subjected to external force, the signal is transmitted to the motor, and the rotating body is driven by the motor to rotate to open the drain outlet 116; when the pressure sensor detects that the external force is removed, the signal is transmitted to the motor, and the rotating body is driven by the motor to rotate to close the drain outlet 116.

[0061] In another embodiment, the air duct structure 20 also includes a second elastic member and a support member, the air duct 110 includes a third end and a fourth end opposite to each other, the third end is provided with an air outlet 114, the fourth end is provided with an air inlet 112 and a drain outlet 116, the support member is arranged at the end of the fourth end, one end of the switch member 300 is connected to the end of the fourth end through the second elastic member, and the other end of the switch member 300 is rotatably arranged on the support member.

[0062] When the switch component 300 is in the first working state, the other end of the switch component 300 is subjected to external force and overcomes the elastic force of the second elastic member to rotate relative to the support member to open the drain outlet 116; in this way, the support member and the switch component 300 form a "lever structure", when water hitting the shielding member 200 falls on the switch component 300 or water poured into the air duct 110 falls on the switch component 300, the water will apply external force to the switch component 300, and at this time the switch component 300 will overcome the elastic pulling force and rotate relative to the support member, thereby opening the drain outlet 116 and draining the water.

[0063] When the switch member 300 is in the second working state, the second elastic member recovers its deformation and drives the other end of the switch member 300 to rotate to close the drain port 116. In this way, when the water is drained, the external force is removed, and the second elastic member recovers its deformation. Under the action of the restoring force of the second elastic member, the switch member 300 rotates relative to the support member to contact and cooperate with the inner wall of the air duct 110 to close the drain port 116. Then, when the fan 30 is running, the drain port 116 is in a closed state, which can reduce the wind loss of the fan 30.

[0064] Please refer to Figure 4 When the switch 300 is in the second working state, it can cooperate with the inner wall of the air duct 110 to close the drain port 116, thereby reducing the loss of the fan 30. Figure 3 and Figure 4In this embodiment, a blocking portion 118 is provided on the inner wall of the air duct 110, and the blocking portion 118 is spaced apart from the partition 120. When the switch component 300 is in the second working state, the external force is removed and the other end of the switch component 300 contacts and cooperates with the blocking portion 118 to close the drain outlet 116; when the switch component 300 is in the first working state, the other end of the switch component 300 is separated from the blocking portion 118 under the action of the external force to open the drain outlet 116.

[0065] Furthermore, the blocking portion 118 is closer to the air outlet 114 than the switch 300, and when the switch 300 is in the second working state, the other end of the switch 300 contacts and partially overlaps with the bottom of the blocking portion 118. In this way, the reliability of closing the drain port 116 can be improved.

[0066] Specifically, the blocking portion 118 may be integrally formed with the air duct 110 , or fixed to the inner wall of the air duct 110 by welding or the like; optionally, the blocking portion 118 may be a blocking protrusion or a blocking block.

[0067] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0068] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0069] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0070] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An air duct structure, characterized in that: include: An air duct body, wherein the air duct body is provided with an air duct, and the air duct is formed with an air outlet, an air inlet and a drain outlet; A shielding member, the shielding member is arranged in the air duct, the shielding member is spaced apart from the air inlet and the shielding member is arranged to shield the air inlet; and A switch component, the switch component is connected to the air duct body, the switch component has a first working state of opening the drain port when an external force is applied, and a second working state of closing the drain port when the external force is removed; The air inlet and the drain outlet are both located on a side opposite to the air outlet, the drain outlet is arranged opposite to the air outlet, the air duct includes a first section and a second section connected to the first section, the first section is provided with the air outlet, the second section is provided with the air inlet and the drain outlet, the cross-sectional area of ​​the second section is larger than the cross-sectional area of ​​the first section, the shielding member is connected to the side wall of the second section close to the air inlet, and the orthographic projection of the shielding member falls on the drain outlet.

2. The air duct structure according to claim 1, characterized in that: The air duct body is further provided with a partition, which is arranged in the air duct, and the air inlet and the drain outlet are separated and arranged by the partition.

3. The air duct structure according to claim 2, characterized in that: The switch member is a first elastic member, and one end of the switch member is fixedly arranged on the partition; When the switch element is in the first working state, the other end of the switch element is bent and deformed by an external force and opens the drain port; When the switch element is in the second working state, the other end of the switch element recovers its deformation and contacts and cooperates with the side wall of the air duct to close the drain port.

4. The air duct structure according to claim 3, characterized in that: The switch element is a silicone sheet.

5. The air duct structure according to claim 1, characterized in that: The shielding member includes a first end and a second end opposite to each other, the first end is fixed to the inner wall of the air duct, the shielding member is inclined relative to the air duct and the second end is closer to the drain outlet than the first end to guide water in a direction toward the drain outlet.

6. The air duct structure according to claim 1, characterized in that: A guide groove for guiding water to the drain port is provided on a side wall of the shielding member facing the air outlet.

7. The air duct structure according to claim 1, characterized in that: The switch element is rotatably arranged in the air duct; When the switch element is in the first working state, the switch element is subjected to an external force and rotates relative to the air duct to open the drain port; When the switch element is in the second working state, the external force is removed and the switch element rotates relative to the air duct to close the drain port.

8. The air duct structure according to claim 1, characterized in that: It also includes a second elastic member and a support member, the air duct includes a third end and a fourth end opposite to each other, the third end is provided with the air outlet, the fourth end is provided with the air inlet and the drain outlet, the support member is arranged at the end of the fourth end, one end of the switch member is connected to the end of the fourth end through the second elastic member, and the other end of the switch member is rotatably arranged on the support member; When the switch member is in the first working state, the other end of the switch member is subjected to an external force and overcomes the elastic force of the second elastic member to rotate relative to the support member to open the drain port; When the switch element is in the second working state, the second elastic element recovers its deformation and drives the other end of the switch element to rotate to close the drain port.

9. The air duct structure according to any one of claims 2 to 4, characterized in that: The inner wall of the air duct is provided with a blocking portion, and the blocking portion is spaced apart from the partition portion. When the switch element is in the second working state, the external force is withdrawn and the other end of the switch element contacts and cooperates with the blocking portion to close the drain outlet; when the switch element is in the first working state, the other end of the switch element is separated from the blocking portion under the action of the external force to open the drain outlet.

10. The air duct structure according to claim 9, characterized in that: The blocking portion is closer to the air outlet than the switch element. When the switch element is in the second working state, the other end of the switch element contacts and cooperates with the bottom of the blocking portion and partially overlaps.

11. A humidifier, characterized in that: The invention comprises the air duct structure according to any one of claims 1 to 10.

12. The humidifier according to claim 11, characterized in that It also includes a fan, and the air outlet of the fan is connected to the air inlet.

Images