A wash-free humidifier

Abstract

The present invention relates to the technical field of humidifiers, and in particular to a wash-free humidifier. The wash-free humidifier comprises: a shell; an air duct structure, which is arranged in the shell and has an air inlet and an air outlet formed on the shell; a humidifying cotton, which is arranged in the air duct structure and guides the air flow from bottom to top or from the side to penetrate the humidifying cotton; a water tank, which is arranged in the shell and has at least one water outlet leading to the top of the humidifying cotton. The wash-free humidifier provided by the present invention can lead water to the top of the humidifying cotton for flushing, thereby avoiding the phenomenon that the humidifying cotton becomes smelly after long-term use of the humidifier.

Description

Technical Field

[0001] The invention relates to the technical field of humidifiers, and in particular to a wash-free humidifier. Background Art

[0002] A humidifier is a household appliance that increases the humidity in a room. Traditional humidifiers turn water into mist, which then diffuses into the air to humidify. However, since the mist has a certain weight, it is difficult to diffuse over a large area, resulting in high humidity in the area near the humidifier and uneven distribution of humidity in the room.

[0003] The mistless humidifier mixes water vapor into the air, and the water vapor can better move with the air flow and diffuse fully into the room. Its working principle is: the fan unit blows air to make the air pass through the soaked humidifying cotton, which cleans the air on the one hand and takes away the water vapor on the humidifying cotton on the other hand to complete the humidification. After the air passes through the humidifying cotton, a considerable proportion of impurities such as suspended particles / colloids in the air will be trapped on the humidifying cotton.

[0004] With the use of existing humidifiers, more and more impurities will accumulate on the humidifying cotton, which will eventually cause the humidifying cotton to mold and produce odor, affecting the user experience. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the humidifying cotton of the humidifier becomes smelly after long-term use, resulting in poor user experience, thereby providing a wash-free humidifier with better user experience.

[0006] In order to solve the above technical problems, the present invention provides a wash-free humidifier, comprising:

[0007] case;

[0008] An air duct structure is arranged in the shell and forms an air inlet and an air outlet on the shell;

[0009] A humidifying cotton is arranged in the air duct structure, and the air duct structure guides the air flow to pass through the humidifying cotton from bottom to top or from the side;

[0010] A water tank is arranged in the shell, and at least one water outlet of the water tank is led to the top of the humidifying cotton.

[0011] Optionally, the water tank is a circulating water tank, and an installation box is also fixed in the shell. The bottom of the inner cavity of the installation box is connected with the inner cavity of the circulating water tank through a first water supply structure. The first water supply structure is suitable for controlling the water to be transported from the bottom of the installation box to the circulating water tank. The humidifying cotton is located in the installation box, and the air outlet is connected with the installation box. The air duct structure guides the airflow to pass through the humidifying cotton and then blow it out from the air outlet.

[0012] Optionally, the humidifying cotton is a cylindrical structure with its axis arranged vertically.

[0013] Optionally, the bottom of the inner cavity of the installation box is higher than the bottom of the circulating water tank, and the first water supply structure is a water passage with two ends respectively connecting the installation box and the circulating water tank.

[0014] Optionally, also include:

[0015] The filter element unit has an input port connected to the outlet of the circulating water tank, and a purified water output port leading to the top of the humidifying cotton.

[0016] Optionally, also include:

[0017] The dirty water box is fixed in the shell and is located below the circulating water tank. The inner cavity of the dirty water box is communicated with the dirty water outlet of the filter element unit.

[0018] Optionally, also include:

[0019] A water storage tank is fixed in the shell and is suitable for storing external water. The inner cavity of the water storage tank is connected with the inner cavity of the water tank through a second water delivery structure. The second water delivery structure is suitable for controlling the delivery of water from the water storage tank to the water tank.

[0020] Optionally, the water tank is located below the water storage tank, and the second water delivery structure is a buoyancy valve.

[0021] Optionally, also include:

[0022] The filter screen is arranged in the air duct structure and is located upstream of the air flow direction of the humidifying cotton.

[0023] Optionally, also include:

[0024] The filter screen is fixed in the inner cavity of the installation box, the filter screen is a cylindrical structure with an axis arranged vertically, and the filter screen is located upstream of the airflow direction of the humidifying cotton.

[0025] Optionally, it also includes an outer cylinder, which is arranged outside the installation box and is arranged at intervals, a first air duct is formed between the side wall of the outer cylinder and the side wall of the installation box, a ventilation hole is opened on the upper part of the side wall of the installation box to connect the first air duct with the inner cavity of the installation box, and the first water supply structure runs through the outer cylinder and the installation box.

[0026] Optionally, the filter is sleeved on the periphery of the humidifying cotton and is spaced apart from the humidifying cotton. A gap is left between the filter and the side wall of the installation box to form a second air duct. The second air duct is connected to the first air duct through the vent, and the area surrounded by the humidifying cotton is connected to the air outlet.

[0027] Optionally, also include:

[0028] The fan unit is fixed in the installation box and is located downstream of the air flow direction of the humidifying cotton.

[0029] Optionally, also include:

[0030] A centrifugal member, located upstream of the fan unit in the airflow direction and downstream of the humidifying cotton in the airflow direction, the centrifugal member is suitable for throwing water out to form water mist by relying on centrifugal force;

[0031] A water guide member is located above the centrifugal member, the water outlet of the circulating water tank is led to the top of the water guide member, and the water guide member is suitable for guiding water to fall onto the centrifugal member;

[0032] The water retaining ring plate is arranged between the upper end of the humidifying cotton and the side wall of the installation box. The water retaining ring plate is provided with a water leakage groove, and the water leakage groove is suitable for guiding water to flow into the humidifying cotton and the filter screen.

[0033] Optionally, the humidifying cotton is fixed to the upper part of the inner cavity of the installation box, and the filter is fixed to the lower part of the inner cavity of the installation box, and further includes:

[0034] A windshield cover is arranged on the outside of the humidifying cotton, a gap is left between the windshield cover and the humidifying cotton to form a third air duct, and the third air duct is connected to the air outlet;

[0035] The upper end of the filter screen is connected to the lower end of the wind shield, and a gap is left between the filter screen, the wind shield and the side wall of the installation box to form a fourth air duct.

[0036] Optionally, also include:

[0037] The fan unit, the outer cylinder converges downward to form a truncated cone or prism-shaped accommodating cavity with the bottom of the installation box, and the fan unit is placed in the accommodating cavity.

[0038] Optionally, also include:

[0039] A centrifugal element is located in the area surrounded by the filter screen, and the centrifugal element is suitable for throwing water out to form water mist by relying on centrifugal force;

[0040] A water guide is located above the centrifugal member, and is suitable for guiding water seeping from the humidifying cotton to fall onto the centrifugal member.

[0041] Optionally, the centrifugal component is a barrel-shaped structure with an opening at the upper end, and the side walls and the bottom plate of the barrel-shaped structure are provided with water outlet holes. The water guide component is at least one guide strip, and the guide strip is fixed relative to the installation box. The guide strip is inclined, and the upper end of the guide strip is connected to the bottom end of the humidification cotton or the water outlet of the circulating water tank, and the lower end of the guide strip is located above the opening end of the barrel-shaped structure.

[0042] Optionally, the barrel-shaped structure includes:

[0043] a first side wall having a cylindrical cavity formed therein;

[0044] A second side wall, in which a truncated cone-shaped cavity is formed and the upper end of the second side wall is connected to the lower end of the first side wall, and the diameter of the lower end of the second side wall is smaller than the diameter of the upper end thereof;

[0045] The bottom wall has a convex middle portion and is connected to the edge via an inclined flow guide surface.

[0046] Optionally, the centrifugal component is a conical side structure with a small diameter end located at the top, and the outer surface of the conical side structure has a plurality of spiral teeth evenly distributed along its circumference. The water guiding component includes a water receiving part and a water outlet part, and the water receiving part is connected to the bottom end of the humidifying cotton or the water outlet of the circulating water tank. The water outlet part is provided with a leakage hole, and the water outlet part is located directly above the spiral teeth and is connected to the water receiving part.

[0047] Optionally, a valve hole is provided at the bottom of the water storage tank, and the buoyancy valve comprises:

[0048] A valve body is hinged in the circulating water tank with a hinge axis arranged horizontally, and the hinge axis divides the valve body into a buoyancy part and a working part;

[0049] A valve stem is vertically fixed on the working part and inserted into the valve hole;

[0050] A sealing plate, fixed to the top end of the valve stem and placed in the water storage tank;

[0051] The buoyancy valve has a sealing state in which the buoyancy portion floats upward and the sealing plate covers the valve hole, and a water-passing state in which the buoyancy portion falls downward and the sealing plate is separated from the valve hole.

[0052] Optionally, the buoyancy valve further comprises:

[0053] A top rod is arranged vertically, the top rod is sealed and inserted into the bottom of the circulating water tank and is suitable for moving up and down relative to the circulating water tank, and the top rod is located below the buoyancy part;

[0054] A driving member, adapted to drive the ejector rod to move up and down;

[0055] The buoyancy valve has a locking state in which the push rod moves upward to drive the sealing plate to always cover the valve hole, and an unlocking state in which the push rod moves downward to allow the buoyancy part to float freely.

[0056] Optionally, the driving member includes:

[0057] A motor, fixed in the housing and located below the circulating water tank;

[0058] A driving plate, which is vertically fixed on the output shaft of the motor, and whose upper surface is configured as a curved surface with a smooth transition along the circumferential direction;

[0059] A bracket, fixed in the shell and located below the circulating water tank, the bracket being suitable for mounting the top rod;

[0060] A limiting member, fixed at the lower part of the top rod;

[0061] A spring, pressed between the limiting member and the circulating water tank;

[0062] The lower end of the push rod abuts against the upper surface of the driving disk, and the upper end of the push rod is sealed and inserted into the bottom of the circulating water tank.

[0063] The technical solution of the present invention has the following advantages:

[0064] 1. The wash-free humidifier provided by the present invention is provided with humidifying cotton and a water tank. At least one water outlet of the water tank is led to the top of the humidifying cotton. Impurities trapped on the humidifying cotton in the air can be washed down by running water without causing accumulation of impurities. The phenomenon of humidifying cotton becoming smelly due to long-term use of the humidifier can be avoided.

[0065] 2. The wash-free humidifier provided by the present invention is provided with an installation box, which is connected to a water tank. The humidifying cotton is placed in the installation box. The water in the water tank is led to the top of the humidifying cotton to rinse it. The water precipitated from the humidifying cotton falls into the installation box and flows back into the water tank, thereby realizing circulation and saving water resources.

[0066] 3. The wash-free humidifier provided by the present invention is provided with a filter element unit. After the flushing water flows back to the circulating water tank, it can be purified by the filter element unit and then transported to the top of the humidifying cotton for flushing. In this way, there are fewer impurities in the water used to flush the humidifying cotton, which can prevent impurities from returning to the humidifying cotton again under the action of circulating water, and further prevent the humidifying cotton from becoming smelly.

[0067] 4. The wash-free humidifier provided by the present invention is provided with a water tank. The water tank does not participate in the water circulation and always stores clean water added from the outside. The user replenishes water through the water tank. The water tank does not participate in the internal water circulation, and the water tank is almost isolated from the outside under normal circumstances. External impurities are not easy to enter and pollute, and will not be deposited into dirty water. When the user replenishes and changes water, what he sees is a clean water tank, and the user experience is better. If this part is made transparent, it is still clean when visible from the outside.

[0068] 5. The wash-free humidifier provided by the present invention is provided with a filter. On the one hand, the filter is arranged downstream of the airflow direction of the humidifying cotton. The air will first pass through the filter before entering the humidifying cotton. The filter will filter most of the impurities in the air, and the filter is also a cylindrical structure. The impurities on the filter will also be flushed into the installation box under the action of flowing water, and then flow into the circulating water tank and filtered by the filter core unit. The filter is easier to flush impurities than the humidifying cotton, which better ensures the cleanliness of the humidifying cotton; on the other hand, since the filter is also soaked in water, the air will also be humidified when passing through the filter, so the humidification effect is better.

[0069] 6. The wash-free humidifier provided by the present invention is provided with a centrifugal component, which utilizes centrifugal force to throw water out to form water mist. When the airflow passes through, it will take away part of the water mist, thereby greatly improving the humidification effect.

[0070] 7. The wash-free humidifier provided by the present invention has a buoyancy valve with a locked state and an unlocked state, and in the unlocked state it is also provided with a sealed state and a water-passing state, which can achieve sealing maintenance in a non-working state, and can also achieve automatic control of water on and off according to the water volume in the circulating water tank in a working state, making it more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0072] Figure 1 This is a schematic diagram of the overall structure of the wash-free humidifier according to an embodiment of the present invention;

[0073] Figure 2 This is a cross-sectional view of the structure of a wash-free humidifier according to an embodiment of the present invention;

[0074] Figure 3 This is a schematic diagram of the structure of a circulating water tank according to an embodiment of the present invention;

[0075] Figure 4It is a structural cross-sectional view of a mounting box according to an embodiment of the present invention;

[0076] Figure 5 This is a structural cross-sectional view of the double-layer side wall of the installation box according to an embodiment of the present invention;

[0077] Figure 6 This is a schematic diagram of the first filter installation structure according to an embodiment of the present invention;

[0078] Figure 7 This is a schematic diagram of the second filter installation structure according to an embodiment of the present invention;

[0079] Figure 8 This is a schematic structural diagram of a first type of centrifugal water guide member according to an embodiment of the present invention;

[0080] Fig. 9 This is a schematic structural diagram of a second centrifugal water guide member according to an embodiment of the present invention;

[0081] Fig.10 This is a schematic diagram of the structure of a buoyancy valve according to an embodiment of the present invention;

[0082] Fig.11 This is a schematic structural diagram of a buoyancy valve body according to an embodiment of the present invention;

[0083] Fig.12 It is a schematic structural diagram of a push rod and a driving member according to an embodiment of the present invention.

[0084] Description of reference numerals:

[0085] 1. Shell; 1-1. Air inlet; 1-2. Air outlet; 2. Circulating water tank; 3. Installation box; 4. Humidifying cotton; 5. Filter element unit; 6. Fan unit; 7. Water passage; 8. Water storage tank; 9. Float valve; 9-1. Valve body; 9-2. Valve stem; 9-3. Sealing plate; 9-4. Push rod; 9-5. Motor; 9-6. Bracket; 9-7. Limiting member; 9-8. Spring; 10. Dirty water box; 11. Filter screen; 12. Water retaining ring plate; 13. Wind shield; 14. Barrel-shaped structure; 14-1. First side wall; 14-2. Second side wall; 14-3. Bottom wall; 15. Guide strip plate; 16. Cone side structure; 17. Spiral teeth; 18. Water receiving part; 19. Water outlet; 20. Outer cylinder. DETAILED DESCRIPTION

[0086] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0087] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0088] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0089] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0090] Example

[0091] Combination Figure 1-Figure 2 As shown, an embodiment of the present invention provides a wash-free humidifier, comprising:

[0092] The shell 1 is mainly used to provide protection for the entire structure and provide installation space for the internal components. It can be made of hard plastic or other materials commonly used in the art. The specific shape of the shell 1 is not limited, and can be cylindrical, rectangular, or other common shapes, such as Figure 1 As shown in FIG. 1 , the cross section of the housing 1 of this embodiment is an ellipse.

[0093] The air duct structure is arranged in the housing 1, and forms an air inlet 1-1 and an air outlet 1-2 on the housing 1. The air duct structure provides a channel for airflow to pass through, and the specific structure can use baffles to guide or change the direction of the airflow, and finally form the airflow in the desired direction.

[0094] The humidifying cotton 4 is arranged in the air duct structure, and the air duct structure guides the airflow to penetrate the humidifying cotton 4 from bottom to top or from the side. The humidifying cotton 4 is a mature structure in this field, and the material used is a porous material with strong water adsorption capacity. When the air passes through the pores of the material, it promotes the evaporation of water and takes away the water, such as fiber cotton. The humidifying cotton 4 can be fixed in the installation box 3 with the help of a bracket structure, or it can be directly glued in the installation box 3, or other commonly used methods can be used. The structure of the humidifying cotton 4 can be sheet-shaped, guiding the airflow to penetrate the humidifying cotton 4 from bottom to top, and the impurities in the air remain on the lower surface of the humidifying cotton 4. When water is drawn to the top of the humidifying cotton 4, the flowing water will flush the impurities in the air down; the structure of the humidifying cotton 4 can also be cylindrical, guiding the airflow to penetrate the humidifying cotton 4 from the side, and when water is drawn to the top of the humidifying cotton 4, the flowing water will flush the impurities in the air down.

[0095] The water tank is arranged in the housing 1, and at least one water outlet of the water tank is led to the top of the humidifying cotton 4. The water tank can be placed in the housing or fixed, and the specific fixing means can be bolts, buckles or integral injection molding. The specific shape of the water tank is not limited, and can be a rectangular parallelepiped, a cylindrical shape, or other common shapes, such as Figure 3 As shown in , the water tank of this embodiment is crescent-shaped. The water tank is mainly used to hold circulating water, so it needs to be provided with a water inlet and a water outlet. In this embodiment, the water inlet is arranged at the top of the water tank, and the water outlet is arranged at the bottom of the water tank.

[0096] The wash-free humidifier of this embodiment leads the water in the water tank to the top of the humidifying cotton 4. The water will flush the humidifying cotton 4 under the action of gravity, and will wash down the impurities attached to the humidifying cotton 4 without causing the accumulation of impurities on the humidifying cotton 4, thereby avoiding the humidifying cotton 4 from stinking due to long-term use, and the user experience is better.

[0097] In this embodiment, there is no limitation on the circulation of water, that is, the water can be directly discharged after flushing the humidifying cotton 4, or it can flow back to the water tank for circulation.

[0098] As an improved solution: the water tank is a circulating water tank 2, and an installation box 3 is also fixed in the shell 1. The bottom of the inner cavity of the installation box 3 is connected with the inner cavity of the circulating water tank 2 through a first water delivery structure. The first water delivery structure is suitable for controlling water to be transported from the bottom of the installation box 3 to the circulating water tank 2. The humidifying cotton 4 is located in the installation box 3, and the air outlet 1-2 is connected with the installation box 3. The air duct structure guides the airflow to pass through the humidifying cotton 4 and then blown out from the air outlet 1-2.

[0099] The installation box 3 mainly provides installation space for other components. Its specific shape is not limited. It can be a rectangular parallelepiped, a cylindrical shape, or other common shapes, such as Figure 1As shown in FIG. 1 , the circulating water tank 2 of this embodiment is cylindrical. The installation box 3 can be an integral structure or can be composed of multiple parts. Figure 4 As shown in FIG. 1 , in this embodiment, the installation box 3 is composed of a box bottom integrally connected to the circulating water tank 2 and a box body fixed to the box bottom.

[0100] The main function of the air duct structure is to guide the airflow to pass through the humidifying cotton 4 and then blow out from the air outlet 1-2. Of course, the direction of penetration can be from bottom to top, from outside to inside, or from inside to outside. The air duct can use the following two structures to introduce the airflow into the installation box 3: Structure 1, the bottom of the installation box 3 is sealed and plugged with multiple ventilation pipes, the ventilation pipes extend into the installation box 3 and the upper ends are bent downward. When working, the wind enters the ventilation pipes from the lower end and then enters the installation box 3; Structure 2, multiple air inlets are opened on the side wall of the installation box 3, and the wind is guided to enter the installation box from the air inlets using structures such as a cylinder.

[0101] The main function of the first water delivery structure is to control the water to be delivered from the bottom of the installation box 3 to the circulating water tank 2. Specifically, a water pipe or similar structure can be used to introduce water by gravity, or a pump can be used to pump water away. The reason why the bottom of the installation box 3 is connected to the circulating water tank 2 is to prevent the water in the installation box 3 from settling for a long time.

[0102] In this preferred solution, the water in the circulating water tank 2 is led to the top of the humidifying cotton 4 to rinse the humidifying cotton 4. The water in the humidifying cotton 4 is precipitated and falls into the installation box 3, and then flows back to the circulating water tank 2 through the first water delivery structure. In this way, water circulation is achieved and water resources are saved.

[0103] Preferably, refer to Figure 2 , the humidifying cotton 4 is a cylindrical structure and the axis is arranged vertically. The cylindrical structure is a tubular structure with openings at both ends. The cross-section of the tubular structure can be a polygon such as a circle or a rectangle. The cylindrical structure is provided with an axis. The vertical arrangement is vertical or inclined less than 45°, preferably a vertical arrangement. Whether the airflow passes through the humidifying cotton 4 from the inside to the outside or from the outside to the inside, the impurities in the air are blocked on the inner side or the outer side of the humidifying cotton, and can be flushed down when water is flushed from the top. In addition, the cylindrical structure can increase the effective area and improve the humidification efficiency.

[0104] Preferably, refer to Figure 2, the bottom of the inner cavity of the installation box 3 is higher than the bottom of the circulating water tank 2, and the first water delivery structure is a water passage 7 with two ends connecting the installation box 3 and the circulating water tank 2 respectively. In this way, gravity can be used to realize that the water in the installation box 3 flows into the circulating water tank 2, without the need to add other structures such as pumps, which is low in cost. Moreover, since the bottom of the installation box 3 is higher, the water is always in a flowing circulation state, which can prevent water from accumulating in the installation box 3, thereby causing the accumulation of impurities. Of course, in other embodiments, the circulating water tank 2 can also be set higher than the bottom of the installation box 3, and a pump or other structure can be used to pump the water at the bottom of the installation box 3 into the circulating water tank 2.

[0105] As an improvement: refer to Figure 2 The wash-free humidifier also includes a filter element unit 5, whose input port is connected to the circulating water tank 2, and whose clean water output port is led to the top of the humidifying cotton 4. The filter element unit 5 is mainly used to filter the circulating water, and is composed of a hose, a water pump, a filter element, and a solenoid valve; the function of the hose is to connect each component to ensure its sealing and the smoothness of the waterway; the function of the water pump is to give the water a certain centrifugal force so that it can pass through the filter element and pump it to a high place; the function of the filter element is to filter the water in the water circulation path to purify it; the function of the solenoid valve is to control the opening and closing of the filter element sewage discharge channel. If it is in a closed state, the water will be filtered normally and participate in the circulation. If it is in an open state, the water will be discharged to the dirty water box 10 and take out the impurities left by the filter element. The filter element unit 5 can be fixed in the installation box 3 through other structures such as a bracket, or it can be directly fixed on other components. For example, in this embodiment, the filter element unit 5 is fixed on the outside of the bottom of the circulating water tank 2. The filter element unit 5 is provided with three ports: an input port, a clean water output port and a dirty water output port. The dirty water output port is not limited here and can be connected to an external dirty water box 10 or directly discharged to an external sewer, a trash can or the like.

[0106] As an improvement: refer to Figure 2 The wash-free humidifier also includes a dirty water box 10, which is fixed in the shell 1 and is located below the circulating water tank 2. The inner cavity of the dirty water box 10 is connected to the dirty water outlet of the filter element unit 5. The dirty water box 10 needs to be detachable, which is convenient for users to clean. The dirty water box 10 is directly integrated into the wash-free humidifier and can be placed in any position during use, eliminating the limitation of its placement position. Of course, in other embodiments, the dirty water box 10 may not be provided, and the dirty water outlet of the filter element unit 5 may be directly connected to the external sewer, trash can, etc., and the dirty water is directly discharged. However, this structure requires the wash-free humidifier to be placed near the sewer, trash can, etc., which has certain limitations.

[0107] As an improvement: refer to Figure 2The wash-free humidifier also includes a water tank 8, which is fixed in the housing 1 and is suitable for storing external water. The inner cavity of the water tank 8 is connected to the inner cavity of the circulating water tank 2 through the second water delivery structure, and the second water delivery structure is suitable for controlling the water to be delivered from the water tank 8 to the circulating water tank 2. The main function of the second water delivery structure is to control the water to be delivered from the water tank 8 to the circulating water tank 2. Specifically, water pipes, valves or similar structures can be used to introduce water by gravity, or a pump can be used to pump the water away. Preferably, in this embodiment, the circulating water tank 2 is located below the water tank 8, and the second water delivery structure is a buoyancy valve 9. Of course, in other embodiments, the water tank 8 can also be lower than the circulating water tank 2, and the water in the water tank 8 can be pumped to the circulating water tank 2 by using a pump or other structure.

[0108] As an improvement: refer to Figure 2 The wash-free humidifier also includes a filter 11, which is arranged in the air duct structure and upstream of the airflow direction of the humidifying cotton 4. The filter 11 is preferably made of nylon material, and is mainly used to filter impurities in the air. The shape of the filter 11 is not limited, and it can be layered or cylindrical, as long as the airflow passes through the filter 11 first and then through the humidifying cotton 4. The filter 11 can be fixed in the inner cavity of the installation box 3 by a bracket or other structure, or it can be fixed by hooking, bonding, hanging, etc. The filter 11 is located upstream of the airflow direction of the humidifying cotton 4, that is, the airflow passes through the filter 11 first and then through the humidifying cotton 4. When the air passes through the filter 11, some impurities will be isolated on the filter 11, so that the air reaching the humidifying cotton 4 contains fewer impurities, thereby reducing the amount remaining on the humidifying cotton 4, avoiding the humidifying cotton 4 from stinking after long-term use, affecting the user experience.

[0109] Specifically, when the humidifying cotton 4 adopts a cylindrical structure, the filter 11 is also a cylindrical structure and the axis is arranged vertically, and the filter 11 is located upstream of the airflow direction of the humidifying cotton 4. Before the air enters the humidifying cotton 4, it first passes through the filter 11, and the filter 11 will filter the impurities in the air, so that the impurities are trapped on the filter 11, and then flushed to the circulating water tank 2 through running water for filtration. Compared with the solution with only the humidifying cotton 4, on the one hand, the filter 11 can intercept most of the impurities in the air, so that fewer impurities reach the humidifying cotton 4, which is conducive to the cleaning of the humidifying cotton 4, and due to the material reason, the impurities on the filter 11 are easier to clean, which is more conducive to keeping clean; on the other hand, the filter 11 is also infiltrated, and the air will also take away moisture when passing through the filter 11, so the humidification effect can be improved.

[0110] Two preferred installation structures of the filter screen 11 are provided below.

[0111] First, we introduce a common air duct structure for the following two structures. Figure 5An outer cylinder 20 is also provided outside the installation box 3, and the outer cylinder 20 is arranged at an interval with the installation box 3, and a first air duct is formed between the side wall of the outer cylinder 20 and the side wall of the installation box 3, and a vent is provided on the upper part of the side wall of the installation box 3 to connect the first air duct with the inner cavity of the installation box 3, and the first water delivery structure runs through the outer cylinder 20 and the installation box 3. When in use, wind enters the first air duct from the lower end, and then enters the inner cavity of the installation box 3 through the vent.

[0112] The first structure:

[0113] Reference Figure 6 , the filter screen 11 is sleeved on the periphery of the humidifying cotton 4 and is spaced apart from the humidifying cotton 4. A gap is left between the filter screen 11 and the side wall of the installation box 3 to form a second air duct. The second air duct is connected to the first air duct through the vent, and the area surrounded by the humidifying cotton 4 is connected to the air outlet 1-2. When in use, the wind enters the first air duct from below, then enters the second air duct through the vent, penetrates the filter screen 11 from outside to inside, and then penetrates the humidifying cotton 4 from outside to inside, and finally is discharged from the vent. In the first air duct, the airflow flows from bottom to top, and in the second sealed channel, the airflow flows from top to bottom. By changing the direction of the airflow, the airflow speed is slowed down, and the airflow is fully in contact with the moisture in the humidifying cotton, which is conducive to improving the humidification effect.

[0114] Based on the structure of the above scheme, the fan unit 6 is located downstream of the airflow direction of the humidifying cotton 4. The fan unit 6 is composed of a motor and a fan. The motor drives the fan to rotate, thereby generating airflow, so that the air can pass through the layers of filtration and participate in the air circulation of the entire space.

[0115] As an improvement: refer to Figure 6 The wash-free humidifier also includes a centrifugal part, which is located upstream of the airflow direction of the fan unit 6 and downstream of the airflow direction of the humidifying cotton 4. The centrifugal part is suitable for relying on centrifugal force to throw water out to form water mist; a water guide part, which is located above the centrifugal part, and the water outlet of the circulating water tank 2 is led to the water guide part, which is suitable for guiding water to fall on the centrifugal part; a water retaining ring plate 12, which is arranged between the upper end of the humidifying cotton 4 and the inner side wall 3-3, and a water leakage groove is arranged on the water retaining ring plate 12, which is suitable for guiding water to flow into the humidifying cotton 4 and the filter 11. When in use, the circulating water tank 2 transports water to the top of the water guide part, and the water falls on the centrifugal part through the water guide part. The centrifugal part works to throw water out to form water mist, and finally leaks through the water leakage groove to the filter 11 and the humidifying cotton 4 to achieve infiltration. This structure allows the air to be humidified three times before being discharged, through the filter 11, the humidifying cotton 4 and the centrifugal water mist, thereby improving the humidification effect.

[0116] The second structure:

[0117] Reference Figure 7The humidifying cotton 4 is fixed to the upper part of the inner cavity of the installation box 3, and the filter screen 11 is fixed to the lower part of the inner cavity of the installation box 3. It also includes a wind shield 13, which is arranged on the outer side of the humidifying cotton 4. There is a gap between the wind shield 13 and the humidifying cotton 4 to form a third air duct, and the third air duct is connected to the air outlet 1-2; the upper end of the filter screen 11 is connected to the lower end of the wind shield 13, and there is a gap between the filter screen 11 and the wind shield 13 and the side wall of the installation box 3 to form a fourth air duct. When in use, the wind enters the first air duct from below, then enters the fourth air duct through the vent, penetrates the filter screen 11 from outside to inside, and then penetrates the humidifying cotton 4 from inside to outside, and finally is discharged from the vent.

[0118] On the basis of the above structure, the outer cylinder 20 converges downward to form a truncated cone or prism-shaped accommodation cavity with the bottom of the installation box 3, and the fan unit 6 is placed in the accommodation cavity.

[0119] As an improvement, refer to Figure 7 The wash-free humidifier also includes a centrifugal part, which is located in the area surrounded by the filter 11. The centrifugal part is suitable for relying on centrifugal force to throw water out to form water mist; a water guide part is located above the centrifugal part, and the water guide part is suitable for guiding the water seeping from the humidification cotton 4 to fall on the centrifugal part. When in use, the filter element unit 5 transports water to the top of the humidification cotton 4 through the clean water outlet, and the water precipitated from the humidification cotton 4 falls on the centrifugal part through the water guide part. The centrifugal part works to throw water out to form water mist, and finally flows back to the circulating water tank 2 through the first water delivery structure. This structure allows the air to be humidified three times before being discharged through the filter 11, the centrifugal water mist and the humidification cotton 4, thereby improving the humidification effect. In addition, placing the centrifugal part in the filter 11 has an additional benefit: the water thrown out by the centrifugal part hits the filter 11, which can better rinse the filter 11, which is conducive to the separation of impurities from the filter 11.

[0120] In the first structure mentioned above, the fan unit 6 is fixed on the top of the installation box 3; in the second structure, the fan unit 6 is fixed in the accommodating cavity surrounded by the lower end of the outer cylinder 20 and the bottom of the installation box 3. Of course, the fan unit 6 can also be fixed in the middle or other position of the installation box 3, as long as airflow can be generated.

[0121] The above two structures are only preferred arrangements of the filter 11 and related structures. Of course, in other embodiments, other structures may also be used. For example, the fan in the first structure may be arranged at the lower part of the installation box 3, and the centrifugal part may be equipped with a power assembly separately; the fan in the second structure may be arranged at the upper part of the installation box 3, and the centrifugal part may be equipped with a power assembly separately; or the filter 11 may be arranged on the inner side of the humidifying cotton 4, and the wind may pass through the humidifying cotton 4 from the inside to the outside; or other structures that are easily designed by those skilled in the art may be used.

[0122] Two preferred centrifugal element and water guide element structures are provided here.

[0123] The first one: reference Figure 8 The centrifugal member is a barrel-shaped structure 14 with an opening at the top, and the sidewall and bottom plate of the barrel-shaped structure 14 are both provided with water outlet holes. The water guide member is at least one guide strip 15, which is fixed relative to the mounting box 3 and is tilted. The upper end of the guide strip 15 is connected to the bottom end of the humidifying cotton 4 or the water outlet of the circulating water tank 2, and the lower end of the guide strip 15 is located above the opening end of the barrel-shaped structure 14. In this embodiment, four guide strips 15 are provided to form a cross structure. When in use, water flows into the centrifugal member through the water guide member, and the water is thrown out through the water outlet hole to form water mist due to the centrifugal force of the centrifugal member.

[0124] Preferably, the barrel-shaped structure 14 includes a first side wall 14-1, in which a cylindrical cavity is formed; a second side wall 14-2, in which a truncated cone-shaped cavity is formed and the upper end is connected to the lower end of the first side wall 14-1, and the lower end diameter of the second side wall 14-2 is smaller than the upper end diameter; a bottom wall 14-3, the middle part of which is convex and connected to the edge through an inclined guide surface. The second side wall 14-2 allows the centrifugal water to be more smoothly transported to the upper water outlet position; the edge of the bottom wall 14-3 forms a groove structure, which is conducive to the accumulation of water to the edge of the bottom wall 14-3, thereby facilitating the water to be thrown upward from the water outlet.

[0125] The second type: reference Fig. 9 The centrifugal member is a truncated cone side structure 16 with a small diameter end located at the top, and a plurality of spiral teeth 17 are evenly distributed on the outer surface of the truncated cone side structure 16 along its circumference. The water guide member includes a water receiving portion 18 and a water outlet portion 19. The water receiving portion 18 is connected to the bottom end of the humidifying cotton 4 or the water outlet of the circulating water tank 2. The water outlet portion 19 is provided with a water leakage hole. The water outlet portion 19 is located just above the spiral teeth 17 and is connected to the water receiving portion 18. When in use, water flows into the outer surface of the centrifugal member through the water guide member, and the water is thrown out to form water mist through the centrifugal force of the centrifugal member and the spiral teeth 17.

[0126] The above two centrifugal parts and water guide parts structures can be used in the installation schemes of the above two filter screens 11, or applied to other embodiments. Preferably, the first centrifugal part and water guide part structure is installed in the second filter screen 11 installation structure, the upper end of the guide plate 15 is connected to the bottom end of the humidification cotton 4, and the guide plate 15 and the wind shield can be fixed and formed into one piece, and the centrifugal part and the fan share a motor; the second centrifugal part and water guide part structure is installed in the first filter screen 11 installation structure, the water receiving part 18 is connected to the clean water output port of the filter element unit 5, and the centrifugal part and the fan share a motor.

[0127] As a preferred solution of the buoyancy valve 9:

[0128] Reference Fig.10 and Fig.11, a valve hole is provided at the bottom of the water storage tank 8, and the buoyancy valve 9 includes:

[0129] The valve body 9-1 is hinged in the circulating water tank 2 and the hinge axis is arranged horizontally. The hinge axis divides the valve body 9-1 into a buoyancy part and a working part. The buoyancy part is made of a material with a density smaller than that of water and can float after receiving a certain buoyancy. The working part is mainly used to install other components to realize the function of the buoyancy valve 9.

[0130] The valve stem 9-2 is vertically fixed on the working part and inserted into the valve hole;

[0131] The sealing plate 9-3 is fixed to the top end of the valve stem 9-2 and is placed in the water storage tank 8;

[0132] The buoyancy valve 9 has a sealing state in which the buoyancy portion floats upward to cover the sealing plate 9-3 on the valve hole, and a water-passing state in which the buoyancy portion falls downward to separate the sealing plate 9-3 from the valve hole.

[0133] There are two states during operation: when there is no water or insufficient water in the circulating water tank 2, the gravity of the buoyancy part is greater than the buoyancy, and the buoyancy part is supported at the lower limit position. At this time, the working part is at the upper limit position, the valve stem 9-2 and the sealing plate 9-3 are both at the upper limit position, the sealing plate 9-3 is separated from the valve hole, and water enters the circulating water tank 2 from the water storage tank 8 through the valve hole to replenish the water in the circulating water tank 2; when the water volume in the circulating water tank 2 reaches a certain value, the buoyancy of the buoyancy part is greater than its gravity, and the buoyancy part moves up to the upper limit position. At this time, the working part gradually moves down to the lower limit position, and the sealing plate 9-3 covers the valve hole position to complete the seal, preventing the water in the water storage tank 8 from entering the circulating water tank 2. As the water volume in the circulating water tank 2 decreases, the buoyancy of the buoyancy part decreases until it is less than its gravity, and the buoyancy part moves down again to the lower limit position, and the cycle continues.

[0134] The preferred buoyancy valve 9 structure can realize the automatic on / off of the water storage tank 8 and the circulating water tank 2 according to the amount of water entering the circulating water tank 2, and can better meet the use requirements by designing the shape and structure of the buoyancy part according to the target buoyancy. Of course, in other embodiments, other common buoyancy valve 9 structures such as a float ball can also be used.

[0135] Specifically, a limit piece 9-7 can be fixed at the lower end of the valve stem 9-2, and a spring 9-8 can be pressed between the limit piece 9-7 and the outer side of the bottom of the circulation box. When the buoyancy part floats up due to the buoyancy, the elastic force of the spring 9-8 can make the sealing plate 9-3 seal more tightly.

[0136] As a further improvement of the above technical solution, refer to Fig.10 , the buoyancy valve 9 also includes:

[0137] The top rod 9-4 is arranged vertically, and the top rod 9-4 is sealed and inserted into the bottom of the circulating water tank 2 and is suitable for moving up and down relative to the circulating water tank 2. The top rod 9-4 is located below the buoyancy part;

[0138] A driving member, adapted to drive the ejector rod 9-4 to move up and down;

[0139] The buoyancy valve 9 has a locking state in which the push rod 9-4 moves upward to drive the sealing plate 9-3 to always cover the valve hole, and an unlocking state in which the push rod 9-4 moves downward to allow the buoyancy part to float freely.

[0140] When the push rod 9-4 moves up and abuts the buoyancy part, the valve stem 9-2 is forced to move down, so that the sealing plate 9-3 always covers the valve hole to complete the locking. This is suitable for the working stage of drying the humidifier when the whole machine stops working or ends the working cycle.

[0141] As a preferred structure of the driving member, refer to Fig.10 and Fig.12 ,include:

[0142] The motor 9-5 is fixed in the housing 1 and is located below the circulating water tank 2;

[0143] The driving plate is vertically fixed on the output shaft of the motor 9-5, and its upper surface is set as a curved surface with smooth transition along the circumferential direction;

[0144] A bracket 9-6 is fixed in the housing 1 and is located below the circulating water tank 2. The bracket 9-6 is suitable for mounting the top rod 9-4.

[0145] A limit member 9-7 is fixed to the lower part of the top rod 9-4;

[0146] The spring 9-8 is pressed between the limiter 9-7 and the circulating water tank 2;

[0147] The lower end of the push rod 9 - 4 abuts against the upper surface of the driving disk, and the upper end of the push rod 9 - 4 is sealed and inserted into the bottom of the circulating water tank 2 .

[0148] When in use, the motor 9-5 rotates to drive the driving disk to rotate, so that different positions on the upper surface of the driving disk contact the lower end of the push rod 9-4. Since the upper surface of the driving disk is a curved surface, it can drive the push rod 9-4 to move up and down.

[0149] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A wash-free humidifier, characterized in that: include: A housing (1), wherein a mounting box (3) is fixed inside the housing (1), and a fan unit (6) is fixed inside the mounting box (3); An air duct structure is arranged in the housing (1), and an air inlet (1-1) and an air outlet (1-2) are formed on the housing (1); A humidifying cotton (4) is arranged in the air duct structure, and the air duct structure guides the air flow to pass through the humidifying cotton (4) from bottom to top or from the side; A water tank is arranged in the housing (1), and is a circulating water tank (2). At least one water outlet of the water tank is led to the top of the humidifying cotton (4). The bottom of the inner cavity of the installation box (3) is higher than the bottom of the circulating water tank (2). A centrifugal element, located upstream of the fan unit (6) in the airflow direction and downstream of the humidifying cotton (4) in the airflow direction, the centrifugal element being suitable for throwing water out to form water mist by relying on centrifugal force; The water guide member is located above the centrifugal member, the water outlet of the circulating water tank (2) is led to the top of the water guide member, and the water guide member is suitable for guiding water to fall onto the centrifugal member.

2. The wash-free humidifier according to claim 1, characterized in that: The bottom of the inner cavity of the installation box (3) is connected to the inner cavity of the circulating water tank (2) via a first water delivery structure, and the first water delivery structure is suitable for controlling the delivery of water from the bottom of the installation box (3) to the circulating water tank (2). The humidifying cotton (4) is located in the installation box (3), the air outlet (1-2) is connected to the installation box (3), and the air duct structure guides the air flow to pass through the humidifying cotton (4) and then blow out from the air outlet (1-2).

3. The wash-free humidifier according to claim 2, characterized in that: The humidifying cotton (4) is a cylindrical structure with an axis arranged vertically.

4. The wash-free humidifier according to claim 2 or 3, characterized in that: The first water delivery structure is a water passage (7) whose two ends are respectively connected to the installation box (3) and the circulating water tank (2).

5. The wash-free humidifier according to claim 4, characterized in that: Also includes: The filter element unit (5) has an input port connected to the outlet of the circulating water tank (2), and a purified water output port leading to the top of the humidifying cotton (4).

6. The wash-free humidifier according to claim 5, characterized in that: Also includes: A dirty water box (10) is fixed in the housing (1) and is located below the circulating water tank (2); the inner cavity of the dirty water box (10) is in communication with the dirty water outlet of the filter element unit (5).

7. The wash-free humidifier according to any one of claims 1-3, 5 and 6, characterized in that: Also includes: A water storage tank (8) is fixed in the housing (1) and is suitable for storing external water. The inner cavity of the water storage tank (8) is connected to the inner cavity of the water tank via a second water delivery structure. The second water delivery structure is suitable for controlling the delivery of water from the water storage tank (8) to the water tank.

8. The wash-free humidifier according to claim 7, characterized in that: The water tank is located below the water storage tank (8), and the second water delivery structure is a buoyancy valve (9).

9. The wash-free humidifier according to any one of claims 1-3, 5, 6, and 8, characterized in that: Also includes: The filter screen (11) is arranged in the air duct structure and is located upstream of the air flow direction of the humidifying cotton (4).

10. The disposable humidifier according to claim 3, characterized in that: Also includes: The filter screen (11) is fixed in the inner cavity of the installation box (3); the filter screen (11) is a cylindrical structure with an axis arranged vertically; the filter screen (11) is located upstream of the airflow direction of the humidifying cotton (4).

11. The wash-free humidifier according to claim 10, characterized in that: The invention also comprises an outer cylinder (20), the outer cylinder (20) being arranged outside the installation box (3) and arranged at intervals, a first air duct being formed between the side wall of the outer cylinder (20) and the side wall of the installation box (3), a vent opening being provided on the upper part of the side wall of the installation box (3) so that the first air duct is connected with the inner cavity of the installation box (3), and the first water delivery structure runs through the outer cylinder (20) and the installation box (3).

12. The wash-free humidifier according to claim 11, characterized in that: The filter screen (11) is sleeved on the periphery of the humidifying cotton (4) and is spaced apart from the humidifying cotton (4); a gap is left between the filter screen (11) and the side wall of the installation box (3) to form a second air duct; the second air duct is connected to the first air duct through the ventilation port; and the area surrounded by the humidifying cotton (4) is connected to the air outlet (1-2).

13. The disposable humidifier according to claim 12, characterized in that: The fan unit (6) is located downstream of the humidifying cotton (4) in the airflow direction.

14. The disposable humidifier according to claim 13, characterized in that: Also includes: A water retaining ring plate (12) is arranged between the upper end of the humidifying cotton (4) and the side wall of the installation box. A water leakage groove is provided on the water retaining ring plate (12), and the water leakage groove is suitable for guiding water to flow into the humidifying cotton (4) and the filter screen (11).

15. The disposable humidifier according to claim 11, characterized in that: The humidifying cotton (4) is fixed to the upper part of the inner cavity of the installation box (3), and the filter screen (11) is fixed to the lower part of the inner cavity of the installation box (3), and further comprises: A windshield (13) is arranged on the outside of the humidifying cotton (4), a gap is left between the windshield (13) and the humidifying cotton (4) to form a third air duct, and the third air duct is connected to the air outlet (1-2); The upper end of the filter screen (11) is connected to the lower end of the wind shield (13), and a gap is left between the filter screen (11), the wind shield (13) and the side wall of the installation box (3) to form a fourth air duct.

16. The disposable humidifier according to claim 15, characterized in that: The outer cylinder (20) converges downward to form a truncated cone or prism-shaped accommodation cavity with the bottom of the installation box (3), and the fan unit (6) is placed in the accommodation cavity.

17. The disposable humidifier according to claim 1, characterized in that: The centrifugal component is a barrel-shaped structure (14) with an opening at the upper end, and the side walls and the bottom plate of the barrel-shaped structure (14) are both provided with water outlet holes. The water guide component is at least one guide strip (15), and the guide strip (15) is fixed relative to the installation box (3). The guide strip (15) is arranged at an angle, and the upper end of the guide strip (15) is connected to the bottom end of the humidifying cotton (4) or the water outlet of the circulating water tank (2), and the lower end of the guide strip (15) is located above the open end of the barrel-shaped structure (14).

18. The disposable humidifier according to claim 17, characterized in that: The barrel-shaped structure (14) comprises: A first side wall (14-1) having a cylindrical cavity formed therein; A second side wall (14-2) having a truncated cone-shaped cavity formed therein and an upper end connected to the lower end of the first side wall (14-1), wherein the diameter of the lower end of the second side wall (14-2) is smaller than the diameter of the upper end; The bottom wall (14-3) is convex in the middle and connected to the edge via an inclined guide surface.

19. The disposable humidifier according to claim 1, characterized in that: The centrifugal component is a truncated cone side structure (16) with a small diameter end located at the top, and the outer surface of the truncated cone side structure (16) is evenly distributed with a plurality of spiral teeth (17) along its circumference. The water guide component comprises a water receiving portion (18) and a water outlet portion (19). The water receiving portion (18) is connected to the bottom end of the humidifying cotton (4) or the water outlet of the circulating water tank (2), and the water outlet portion (19) is provided with a water leakage hole. The water outlet portion (19) is located directly above the spiral teeth (17) and is connected to the water receiving portion (18).

20. The disposable humidifier according to claim 8, characterized in that: The bottom of the water storage tank (8) is provided with a valve hole, and the buoyancy valve (9) comprises: A valve body (9-1) is hinged in the circulating water tank (2) with the hinge axis arranged horizontally, and the hinge axis divides the valve body (9-1) into a buoyancy part and a working part; A valve stem (9-2) is vertically fixed on the working part and inserted into the valve hole; A sealing plate (9-3) is fixed to the top end of the valve stem (9-2) and is placed in the water storage tank (8); The buoyancy valve (9) has a sealing state in which the buoyancy portion floats upward to allow the sealing plate (9-3) to cover the valve hole, and a water-passing state in which the buoyancy portion falls downward to allow the sealing plate (9-3) to separate from the valve hole.

21. The disposable humidifier according to claim 20, characterized in that: The buoyancy valve (9) further comprises: A top rod (9-4) is arranged vertically, the top rod (9-4) is sealed and inserted into the bottom of the circulating water tank (2) and is suitable for moving up and down relative to the circulating water tank (2), and the top rod (9-4) is located below the buoyancy part; A driving member, adapted to drive the push rod (9-4) to move up and down; The buoyancy valve (9) has a locking state in which the push rod (9-4) moves upward to drive the sealing plate (9-3) to always cover the valve hole, and an unlocking state in which the push rod (9-4) moves downward to allow the buoyancy part to float freely.

22. The disposable humidifier according to claim 21, characterized in that: The driving member comprises: A motor (9-5) is fixed in the housing (1) and is located below the circulating water tank (2); A driving disk is vertically fixed on the output shaft of the motor (9-5), and its upper surface is configured as a curved surface with a smooth transition along the circumferential direction; A bracket (9-6) is fixed in the housing (1) and is located below the circulating water tank (2), and the bracket (9-6) is suitable for installing the top rod (9-4); A limiting member (9-7) is fixed on the lower part of the top rod (9-4); A spring (9-8) is pressed between the limiting member (9-7) and the circulating water tank (2); The lower end of the push rod (9-4) abuts against the upper surface of the driving disk, and the upper end of the push rod (9-4) is sealed and inserted into the bottom of the circulating water tank (2).

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