Steam humidifier with water leakage prevention structure

Abstract

The utility model relates to the field of household appliances, concretely is a steam humidifier with water leakage prevention structure, including host computer, be equipped with water storage tank in the host computer, the water injection channel and the water leakage prevention structure that communicate the water storage tank and outside, the water leakage prevention structure includes the leakproof cover that is located in the water injection channel and covers and is located in the water storage tank water inlet, through setting leakproof cover in the water injection channel, and directly covering the water inlet of water storage tank, when the equipment is upset or is impacted by external force, the leakproof cover can prevent water flow to return to the water injection channel and leak to the outside, avoid the environmental pollution, the host computer internal circuit short circuit and the user scald etc. problem that water leaks from the water storage tank to the outside when the equipment is upset, effectively improved the use safety and reliability of steam humidifier.

Description

Technical Field

[0001] This utility model relates to the field of household appliances, specifically a steam humidifier with a leak-proof structure. Background Technology

[0002] Steam humidifiers are widely used in homes, offices, and industrial environments. Their main function is to increase air humidity and improve dry environments by heating water to produce steam. Traditional steam humidifiers typically consist of a main unit, a water tank, and a water inlet channel. Users add water to the water tank through the water inlet channel, and the humidifier converts the water in the tank into steam and releases it into the air when it is working.

[0003] However, in actual use, traditional steam humidifiers have some problems. For example, when the steam humidifier is moved or tipped over due to external impact, the water in the storage tank will leak out from the water inlet channel, which may cause pollution to the surrounding environment, short circuits in the internal circuit of the main unit, or even scalds to users. Therefore, it is necessary to develop a steam humidifier with a leak-proof structure to solve the problems that may be caused by water leakage from the storage tank when the existing steam humidifier is moved or tipped over due to external impact, such as environmental pollution, short circuits in the internal circuit of the main unit, and scalds to users. Utility Model Content

[0004] To address the aforementioned problems associated with existing steam humidifiers, such as water leakage from the storage tank when moved or tipped over due to external impact, which could lead to environmental pollution, short circuits in the main unit's internal circuitry, and scalding for users, the technical solution adopted by this utility model is as follows: A steam humidifier with a leak-proof structure includes a main unit, which has a water storage tank, a water injection channel connecting the water storage tank to the outside, and a leak-proof structure. The leak-proof structure includes a leak-proof cover located in the water injection channel and covering the water inlet of the water storage tank.

[0005] Furthermore, the leak-proof structure includes a sealing ring connected to the side of the leak-proof cover, and the sealing ring is provided with a deformable part connected to the inner wall of the water inlet of the water storage tank.

[0006] Furthermore, the water injection channel has a positioning part extending circumferentially on the side near the water storage tank, and the leak-proof cover has a first extension part extending circumferentially, which abuts against the upper side of the positioning part to achieve the positioning of the leak-proof cover.

[0007] Furthermore, the leak-proof structure includes a snap-fit ​​structure for fixing the leak-proof cover. The snap-fit ​​structure includes a first limiting part located inside the water injection channel, a limiting groove located on the first extension part, and a positioning block. The first limiting part is located above the positioning part, and the limiting groove allows the first extension part to pass through the positioning part. By rotating the leak-proof cover, the positioning part and the positioning block are brought into contact, and the first extension part is engaged between the positioning part and the first limiting part.

[0008] Furthermore, the upper side of the leak-proof cover is provided with a receiving cavity for containing liquid, and the bottom of the receiving cavity is provided with a one-way flow structure for the liquid to flow from the receiving cavity to the water storage tank.

[0009] Furthermore, the one-way flow structure is a sliding one-way valve, including a shaft hole at the bottom of the receiving cavity, a sliding block slidably connected to the shaft hole, and a drainage hole on the periphery of the shaft hole. The sliding block includes a sliding shaft slidably connected to the shaft hole, a second limiting part connected to one end of the sliding shaft and close to the receiving cavity, and a sealing part connected to the other end of the sliding shaft and close to the water storage tank.

[0010] Furthermore, the receiving cavity is provided with at least one gripping portion extending radially along the leak-proof cover.

[0011] Furthermore, the outer edge of the sealing portion is provided with a second extension portion extending toward the leak-proof cover, the second extension portion corresponding to the outer peripheral side of the drainage hole.

[0012] Furthermore, when the sliding block slides along the shaft hole until the second limiting part abuts against the leak-proof cover, there is a water inlet gap between the second extension and the bottom of the leak-proof cover that communicates with the drainage hole.

[0013] Furthermore, the hydrophobic hole is located at the center of the bottom of the receiving cavity, and the receiving cavity gradually slopes downward from the outside towards the center where the hydrophobic hole is located.

[0014] The beneficial effects of this utility model are as follows: This invention features a leak-proof cover installed in the water injection channel, which directly covers the water inlet of the water storage tank. When the device is tilted or subjected to external impact, the leak-proof cover can prevent water from flowing back into the water injection channel and leaking to the outside. This avoids environmental pollution, short circuits in the main unit's internal circuitry, and scalding of users caused by water leaking from the water storage tank to the outside when the device is tilted, effectively improving the safety and reliability of the steam humidifier. Attached Figure Description

[0015] Figure 1 This is an exploded view of the steam humidifier of this utility model; Figure 2This is a diagram showing the internal structure of the steam humidifier of this utility model; Figure 3 for Figure 2 Enlarged view of part A in the image; Figure 4 This is a perspective view of the leak-proof cover of this utility model; Figure 5 for Figure 4 B-B section Figure 1 ; Figure 6 for Figure 4 B-B section Figure 2 . Detailed Implementation

[0016] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings. The described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0017] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0018] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0019] Please see Figures 1 to 6 The steam humidifier shown includes a main unit 1, which contains a water storage tank 2, a water injection channel 3 connecting the water storage tank 2 to the outside, and a leak-proof structure 4. The leak-proof structure 4 includes a leak-proof cover 41 located in the water injection channel 3 and covering the water inlet of the water storage tank 2.

[0020] In this utility model, the leak-proof cover 41 is located at the entrance of the water injection channel 3 and directly covers the water inlet of the water storage tank 2. When the device needs to add water, the user can remove the leak-proof cover 41 from the water injection channel 3 and then inject water into the water storage tank 2 through the water injection channel 3. After the water injection is completed, the leak-proof cover 41 is reinstalled on the water injection channel 3 and placed over the water inlet of the water storage tank 2, so that the water in the water storage tank 2 cannot leak to the outside from the water injection channel 3. This avoids environmental pollution, short circuits in the internal circuit of the main unit 1, and scalding of the user caused by water leaking from the water storage tank 2 to the outside when the device is tilted, and effectively improves the safety and reliability of the steam humidifier.

[0021] Furthermore, the leak-proof structure 4 includes a sealing ring 42 connected to the side of the leak-proof cover 41, and the sealing ring 42 is provided with a deformable part 421 connected to the inner wall of the water inlet of the water storage tank 2.

[0022] In this invention, the sealing ring 42 is disposed on the side of the leak-proof cover 41 and is tightly fitted to the inner wall of the water inlet of the water storage tank 2. The sealing ring 42 is made of a highly elastic material, such as silicone or rubber, which can provide a dynamic sealing effect through elastic deformation, ensuring that even when the equipment is tilted or subjected to external impact, the water in the water storage tank 2 will not leak from the water injection channel 3, thus ensuring the stability and reliability of the connection between the leak-proof cover 41 and the water inlet of the water storage tank 2. Furthermore, the deformable part 421 is an elastic protrusion or corrugated structure in the sealing ring 42. When the leak-proof cover 41 is placed over the water inlet of the water storage tank 2, the deformable part 421 contacts the inner wall of the water inlet of the water storage tank 2 and undergoes elastic deformation, forming a tighter seal, further improving the leak-proof performance and stability of the leak-proof structure.

[0023] Furthermore, the water injection channel 3 is provided with a positioning part 31 extending circumferentially on the side near the water storage tank 2, and the leak-proof cover 41 is provided with a first extension part 411 extending circumferentially, the first extension part 411 abutting against the upper side of the positioning part 31 to realize the positioning of the leak-proof cover 41.

[0024] In this invention, the positioning part 31 is located inside the water injection channel 3 near the water storage tank 2 and extends axially along the water injection channel 3. It provides stable support and precise positioning for the leak-proof cover 41, ensuring that the leak-proof cover 41 is accurately positioned in both normal working and tilted states. The first extension part 411 is part of the leak-proof cover 41, extending circumferentially and matching the positioning part 31. The lower side of the first extension part 411 is in close contact with the upper side of the positioning part 31, forming an abutment relationship. In normal state, the abutment between the first extension part 411 and the positioning part 31 ensures that the leak-proof cover 41 is in the correct position, avoiding displacement due to vibration or external force, and effectively improving the connection stability and reliability of the leak-proof cover 41 to the water inlet of the water storage tank 2.

[0025] Furthermore, the leak-proof structure 4 includes a snap-fit ​​structure 43 for fixing the leak-proof cover 41. The snap-fit ​​structure 43 includes a first limiting part 431 disposed inside the water injection channel 3, a limiting groove 432 disposed on the first extension part 411, and a positioning block 433. The first limiting part 431 is located on the upper side of the positioning part 31. The limiting groove 432 allows the first extension part 411 to pass through the positioning part 31. By rotating the leak-proof cover 41, the positioning part 31 and the positioning block 433 are brought into contact. The first extension part 411 is engaged between the positioning part 31 and the first limiting part 431.

[0026] In this utility model, the first limiting part is located inside the water injection channel 3 and is disposed above the positioning part 31. Its function is to restrict the upward movement of the first extension 411 of the leak-proof cover 41, ensuring that the leak-proof cover 41 will not loosen after installation. The limiting groove 432 is disposed on the first extension 411 of the leak-proof cover 41, allowing the first extension 411 to pass through the positioning part 31. Furthermore, the positioning block is disposed on the outside of the first extension 411 of the leak-proof cover 41, and is used to abut against the positioning part 31, thereby realizing the rotational locking of the leak-proof cover 41. Specifically, as shown... Figure 3As shown, when installing the leak-proof cover 41, the first extension 411 of the leak-proof cover 41 is aligned with the positioning part 31 in the water injection channel 3, and the first extension 411 passes through the positioning part 31 through the limiting groove 432. Then, the leak-proof cover 41 is rotated so that the positioning block 433 abuts against the positioning part 31. At the same time, the first extension 411 is locked between the positioning part 31 and the first limiting part 431, thus fixing the leak-proof cover 41. The design of the snap-fit ​​structure 43 allows the leak-proof cover 41 to pass through the positioning part 31 through the limiting groove 432. Then, the leak-proof cover 41 is rotated so that the positioning block 433 abuts against the positioning part 31. The first extension 411 is locked between the positioning part 31 and the first limiting part 431 to complete the fixation. The design of the screw fastener structure 43 allows the leak-proof cover 41 to be quickly installed and removed through a simple rotation operation, which is convenient for users to maintain and replace it in daily life. The synergistic effect of the first limiting part 431, the limiting groove 432 and the positioning block 433 ensures that the leak-proof cover 41 can be firmly fixed in any state. Even when the water in the water tank 2 applies pressure to the leak-proof cover 41 when the equipment is tilted, the leak-proof cover 41 will not fall out of the water inlet of the water tank 2, which effectively improves the reliability and stability of the leak-proof structure.

[0027] Furthermore, the upper side of the leak-proof cover 41 is provided with a receiving cavity 412 for containing liquid, and the bottom of the receiving cavity 412 is provided with a one-way flow structure 5 for the liquid to flow from the receiving cavity 412 to the water storage tank 2.

[0028] In this invention, the steam channel 7 of the steam humidifier is connected to the water injection channel 3. The steam generated by the steam generator is transported to the water injection channel 3 through the steam channel 7 and discharged to the outside through the water injection channel 3. This design means that the steam humidifier uses a single channel for water filling and exhaust, which improves the compactness and overall integrity of the steam humidifier. However, this design means that the steam may come into contact with the leak-proof cover 41, resulting in condensation. Therefore, in order to recycle the condensation from the leak-proof cover 41, this invention provides a liquid-containing cavity 412 on the upper side of the leak-proof cover 41, and a one-way flow structure 5 at the bottom of the liquid-containing cavity 412 to allow the liquid to flow from the liquid-containing cavity 412 to the water storage tank 2. This achieves condensation recovery while preventing liquid leakage when the equipment is tilted, further improving the functionality of the steam humidifier.

[0029] Furthermore, the one-way flow structure 5 is a sliding one-way valve, including a shaft hole 51 at the bottom of the receiving cavity 412, a sliding block 52 slidably connected to the shaft hole 51, and a drainage hole 53 on the periphery of the shaft hole 51. The sliding block 52 includes a sliding shaft 521 slidably connected to the shaft hole 51, a second limiting part 522 connected to one end of the sliding shaft 521 and close to the side of the receiving cavity 412, and a sealing part 523 connected to the other end of the sliding shaft 521 and close to the side of the water storage tank 2.

[0030] In this utility model, the one-way flow structure 5 is specifically a sliding one-way valve, including a shaft hole 51 at the bottom of the receiving cavity 412, a sliding block 52 slidably connected to the shaft hole 51, and a drainage hole 53 on the periphery of the shaft hole 51. The shaft hole 51 is the main channel for the sliding block 52 to slide, while the drainage hole 53 allows liquid in the receiving cavity 412 to flow to the water storage tank 2. Further, the sliding block 42 includes a sliding shaft 521 slidably connected to the shaft hole 51. The second limiting part 522 is located at one end of the sliding shaft 421 near the receiving cavity 412, used to limit the maximum downward movement distance of the sliding block 52 and prevent the sliding block 52 from disengaging from the shaft hole 51. The sealing part 523 is located at the other end of the sliding shaft 521, near the water storage tank 2, used to seal the drainage hole 53 and prevent liquid in the water storage tank 2 from flowing towards the water injection channel 3. Specifically, as shown... Figure 5 As shown, when liquid flows into the receiving cavity 412, the liquid applies pressure to the sliding block 52. Under the pressure, the sliding block 52 moves downward until the second limiting part 522 abuts against the leak-proof cover 41, and the sealing part 523 separates from the drainage hole 53, forming a channel for liquid to flow from the receiving cavity 412 to the water storage tank 2, thereby enabling the user to add water to the water storage tank 2; Figure 6 As shown, when the device is tilted, the liquid in the water tank 2 flows to the receiving cavity 412. The liquid exerts pressure on the sealing part 523. Under the pressure, the sliding block 52 moves towards the receiving cavity 412, and the sealing part 523 tightly fits the drainage hole 53 to form a seal, preventing the backflow of liquid. This achieves unidirectional flow control and significantly improves the leak-proof performance and reliability of the steam humidifier.

[0031] Furthermore, the receiving cavity 412 is provided with at least one gripping part 4121 extending radially along the leak-proof cover 41.

[0032] In this invention, the gripping part 4121 is located inside the receiving cavity 412 and extends radially along the leak-proof cover 41, providing a gripping point for the user to easily disassemble or install the leak-proof cover 41. Especially when cleaning or maintenance is required, the user can apply force through the gripping part 4121 to easily rotate or lift the leak-proof cover 41, significantly improving the convenience and safety of user operation, while also facilitating equipment cleaning and maintenance. Further optionally, a portion of the bottom wall of the leak-proof cover 41 extends upwards to form the gripping part 4121, which simplifies the structure of the leak-proof cover 41 and reduces production costs.

[0033] Alternatively, two gripping parts 4121 are provided, and the two gripping parts 4121 are symmetrically spaced around the center of the leak-proof cover 41. This design not only enhances the structural strength of the leak-proof cover 41 and ensures that the leak-proof cover 41 is subjected to uniform force during installation or disassembly, avoiding damage caused by local stress concentration, but also provides multiple gripping points. Users can choose the most convenient position for operation as needed, further improving ease of use.

[0034] Furthermore, the outer edge of the sealing portion 523 is provided with a second extension portion 524 extending toward the leak-proof cover 41, the second extension portion 524 corresponding to the outer peripheral side of the drainage hole 53; even further, as Figure 5 As shown, when the sliding block 52 slides along the shaft hole 51 until the second limiting part 522 abuts against the leak-proof cover 41, the second extension part 524 and the bottom of the leak-proof cover 41 have a water inlet gap 525 that communicates with the drainage hole 53.

[0035] In this invention, a plurality of drainage holes 53 are provided, and each drainage hole 53 is evenly distributed around the circumference of the shaft hole 51. The sealing portion 523 can cover each drainage hole 53, such that the second extension portion 524 corresponds to the outer peripheral side of the drainage hole 53; in practical applications, such as Figure 5As shown, when the water tank 2 is filled with water, the sliding block 52 moves down along the shaft hole 51 under the pressure of the water flow to the second limiting part 524 and abuts against the leak-proof cover 41. At the same time, the sliding block 52 can drive the second extension part 524 away from the bottom of the leak-proof cover 41 and move down. At this time, the second extension part 524 and the bottom of the leak-proof cover 41 form the water inlet gap 525. The water inlet gap 525 connects each of the drainage holes 53 and the inner cavity of the water tank 2, ensuring that the water tank 2 is filled with water normally. When the water tank 2 is filled with water and the steam humidifier does not tip over, because the second extension part 524 and the... The leak-proof covers 41 have only a narrow water inlet gap 525. While ensuring water can enter the water tank 2, the steam humidifier, during daily use, can prevent external dust and other debris from entering the water tank 2 through the drainage hole 53 via the second extension 524, thus ensuring the hygiene of the steam humidifier. It should be noted that since the leak-proof covers 41 only have drainage holes 53 at their bottom for water to enter the water tank 2, and the periphery of the leak-proof covers 41 is tightly connected to the inner wall of the water injection channel 3, the structure of the leak-proof covers 41 itself has a certain dustproof function, ensuring the hygiene of the steam humidifier. Additionally, as... Figure 6 As shown, when the steam humidifier tilts, the sealing part 523 is moved away from the water tank 2 along the shaft hole 51 by the water pressure inside the water tank 2, and the second extension part 524 is moved synchronously by the sliding block 52 to make close contact with the bottom of the leak-proof cover 41, so as to block the water inlet gap 525 and seal the drainage hole 53, preventing the leak-proof cover 41 from leaking water.

[0036] Furthermore, the hydrophobic hole 53 is located at the center of the bottom of the receiving cavity 412, and the receiving cavity 412 gradually slopes downward from the outside towards the center where the hydrophobic hole 53 is located.

[0037] In this invention, the hydrophobic hole 53 is located at the center of the bottom of the receiving cavity 412, and the receiving cavity 412 gradually slopes downward from the outside towards the center where the hydrophobic hole 53 is located. This design can utilize gravity to guide the liquid in the receiving cavity 512 to flow naturally towards the hydrophobic hole 53, reducing the retention of liquid in the receiving cavity 412, and at the same time accelerating the liquid flow efficiency and discharge efficiency.

[0038] Example 1 A steam humidifier with a leak-proof structure includes a main unit 1. The main unit 1 is provided with a water storage tank 2, a water injection channel 3 connecting the water storage tank 2 and the outside, and a leak-proof structure 4. The leak-proof structure 4 includes a leak-proof cover 41 located in the water injection channel 3 and covering the water inlet of the water storage tank 2.

[0039] Example 2 Example 2, based on Example 1, also has the following implementation method: The leak-proof structure 4 includes a sealing ring 42 connected to the side of the leak-proof cover 41, and the sealing ring 42 is provided with a deformable part 421 connected to the inner wall of the water inlet of the water storage tank 2.

[0040] Example 3 Example 3, based on Example 1, also has the following implementation method: The water injection channel 3 is provided with a positioning part 31 extending circumferentially on the side near the water storage tank 2. The leak-proof cover 41 is provided with a first extension part 411 extending circumferentially. The first extension part 411 abuts against the upper side of the positioning part 31 to realize the positioning of the leak-proof cover 41.

[0041] Example 4 Example 4, based on Example 3, also has the following implementation method: The leak-proof structure 4 includes a snap-fit ​​structure 43 for fixing the leak-proof cover 41. The snap-fit ​​structure 43 includes a first limiting part 431 located inside the water injection channel 3, a limiting groove 432 located in the first extension part 411, and a positioning block 433. The first limiting part 431 is located above the positioning part 31. The limiting groove 432 allows the first extension part 411 to pass through the positioning part 31. By rotating the leak-proof cover 41, the positioning part 31 and the positioning block 433 are brought into contact. The first extension part 411 is engaged between the positioning part 31 and the first limiting part 431.

[0042] Example 5 Example 5, based on Example 1, also has the following implementation method: The leak-proof cover 41 has a liquid-containing cavity 412 on its upper side, and the bottom of the liquid-containing cavity 412 has a one-way flow structure 5 for the liquid to flow from the liquid-containing cavity 412 to the water storage tank 2.

[0043] Example 6 Example 6, based on Example 5, also has the following implementation method: The one-way flow structure 5 is a sliding one-way valve, including a shaft hole 51 at the bottom of the receiving cavity 412, a sliding block 52 slidably connected to the shaft hole 51, and a drainage hole 53 on the periphery of the shaft hole 51. The sliding block 52 includes a sliding shaft 521 slidably connected to the shaft hole 51, a second limiting part 522 connected to one end of the sliding shaft 521 and close to the side of the receiving cavity 412, and a sealing part 523 connected to the other end of the sliding shaft 521 and close to the side of the water storage tank 2.

[0044] Example 7 Example 7, based on Example 6, also has the following implementation method: The receiving cavity 412 is provided with a plurality of gripping parts 4121 extending radially along the leak-proof cover 41.

[0045] Example 8 Example 8, based on Example 6, further includes the following implementation method: The sealing part 523 has a second extension part 524 extending toward the leak-proof cover 41 at its outer edge, and the second extension part 524 corresponds to the outer peripheral side of the drainage hole 53.

[0046] Example 9 Example 9, based on Example 8, further includes the following implementation method: When the sliding block 52 slides along the shaft hole 51 until the second limiting part 522 abuts against the leak-proof cover 41, the second extension part 524 and the bottom of the leak-proof cover 41 have a water inlet gap 525 that communicates with the drainage hole 53.

[0047] Example 10 Based on Example 6, Example 10 also has the following implementation method: The hydrophobic hole 53 is located at the center of the bottom of the receiving cavity 412, and the receiving cavity 412 gradually slopes downward from the outside towards the center where the hydrophobic hole 53 is located.

[0048] The above examples are merely illustrative of the technical content of this utility model to facilitate reader understanding, but do not imply that the implementation of this utility model is limited to these embodiments. Any technical extensions or re-creations made based on this utility model are protected by this utility model. The scope of protection of this utility model is defined by the claims.

Claims

1. A steam humidifier with a water leakage prevention structure, comprising a main body (1), characterized in that, The host (1) is provided with a water storage tank (2), a water injection channel (3) connecting the water storage tank (2) and the outside, and a leak-proof structure (4). The leak-proof structure (4) includes a leak-proof cover (41) located in the water injection channel (3) and covering the water inlet of the water storage tank (2).

2. The steam humidifier with a leak-proof structure according to claim 1, characterized in that, The leak-proof structure (4) includes a sealing ring (42) connected to the side of the leak-proof cover (41), and the sealing ring (42) is provided with a deformable part (421) connected to the inner wall of the water inlet of the water storage tank (2).

3. The steam humidifier with a water leakage prevention structure according to claim 1, characterized by, The water injection channel (3) has a positioning part (31) extending circumferentially on the side near the water storage tank (2), and the leak-proof cover (41) has a first extension part (411) extending circumferentially. The first extension part (411) abuts against the upper side of the positioning part (31) to realize the positioning of the leak-proof cover (41).

4. The steam humidifier with a water leakage prevention structure according to claim 3, characterized by, The leak-proof structure (4) includes a snap-lock structure (43) for fixing the leak-proof cover (41). The snap-lock structure (43) includes a first limiting part (431) located inside the water injection channel (3), a limiting groove (432) located on the first extension part (411), and a positioning block (433). The first limiting part (431) is located on the upper side of the positioning part (31). The limiting groove (432) allows the first extension part (411) to pass through the positioning part (31). By rotating the leak-proof cover (41), the positioning part (31) and the positioning block (433) are brought into contact. The first extension part (411) is engaged between the positioning part (31) and the first limiting part (431).

5. The steam humidifier with a leak-proof structure according to claim 1, characterized in that, The leak-proof cover (41) has a liquid-containing cavity (412) on its upper side, and a one-way flow structure (5) is provided at the bottom of the liquid-containing cavity (412) to allow the liquid to flow from the liquid-containing cavity (412) to the water storage tank (2).

6. The steam humidifier with a water leakage prevention structure according to claim 5, characterized by, The one-way flow structure (5) is a sliding one-way valve, including a shaft hole (51) at the bottom of the receiving cavity (412), a sliding block (52) slidably connected to the shaft hole (51), and a drainage hole (53) on the periphery of the shaft hole (51). The sliding block (52) includes a sliding shaft (521) slidably connected to the shaft hole (51), a second limiting part (522) connected to one end of the sliding shaft (521) and close to the side of the receiving cavity (412), and a sealing part (523) connected to the other end of the sliding shaft (521) and close to the side of the water storage tank (2).

7. The steam humidifier with a leak-proof structure according to claim 6, characterized in that, The receiving cavity (412) is provided with at least one gripping part (4121) extending radially along the leak-proof cover (41).

8. The steam humidifier with a leak-proof structure according to claim 6, characterized in that, The sealing part (523) has a second extension (524) extending toward the leak-proof cover (41) at its outer edge, and the second extension (524) corresponds to the outer peripheral side of the drainage hole (53).

9. The steam humidifier with a water leakage prevention structure according to claim 8, characterized by, When the sliding block (52) slides along the shaft hole (51) to the second limiting part (522) abutting against the leak-proof cover (41), the second extension part (524) and the bottom of the leak-proof cover (41) have a water inlet gap (525) communicating with the drainage hole (53).

10. The steam humidifier with a water leakage prevention structure according to claim 6, characterized by, The hydrophobic hole (53) is located at the center of the bottom of the receiving cavity (412), and the receiving cavity (412) gradually slopes downward from the outside towards the center where the hydrophobic hole (53) is located.

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