Water retaining structure

Abstract

The present invention belongs to the technical field of water-washed air, and specifically relates to a water retaining structure, which is located in the water tank and is used to shield the air inlet, and the water retaining structure includes at least two blades, and there is a spacing between two adjacent blades. On a cross section perpendicular to the axial direction of the water tank, one end of the blade facing the axial direction of the water tank and one end of the blade away from the axial direction of the water tank are located in different radial directions of the cross section. The water curtain will not be thrown out of the water tank, which is conducive to reducing the waste of water in the water tank, facilitating full contact between air and the water curtain, and improving the efficiency of the water-washed air device.

Description

Technical Field

[0001] The invention belongs to the technical field of water-washed air, and in particular relates to a water retaining structure. Background Art

[0002] The problem of air pollution has attracted more and more attention, so various air purifiers have emerged. Air purifiers are products that can absorb, decompose or transform various air pollutants and effectively improve the cleanliness of the air.

[0003] At present, the air purifiers used in homes all use dry multi-layer filtration and adsorption methods (such as electrostatic adsorption, activated carbon adsorption, HEPA filtration, etc.) to purify the air. When this type of air purifier is working, pollutants will directly accumulate on the filter screen of the filtration device. If accumulated for a long time, the pores on the filter screen will be blocked, affecting the air filtration effect, and the dust accumulated on the filter screen will become a breeding ground for bacteria and form secondary pollution. Therefore, water-washed air purification products came into being.

[0004] The existing water-washing air purification device includes a water tank and a water-spinning member, which is rotatably arranged in the water tank and used to form a water curtain. An air inlet is provided on the side wall of the water tank, and dust-containing gas from the outside enters the water tank from the air inlet and is fully contacted with the water curtain to be purified. When the water-spinning member rotates to form a water curtain, the water curtain may be thrown out of the water tank from the air inlet, resulting in a waste of water in the water tank. Summary of the invention

[0005] In order to solve the above-mentioned problems in the prior art, that is, to solve the problem that the water curtain of the existing water-washing air purification device is thrown out of the water tank from the air inlet, causing the waste of water in the water tank. The present invention provides a water retaining structure for a water-washing air device, the water-washing air device comprises a water tank and a water-slinging part rotatably arranged in the water tank, the side wall of the water-slinging part is provided with a water-slinging port, the side wall of the water tank is provided with an air inlet, the water retaining structure is located in the water tank and is used to shield the air inlet, the water retaining structure comprises at least two blades, there is a spacing between two adjacent blades, on a cross section perpendicular to the axial direction of the water tank, one end of the blade facing the axial direction of the water tank and one end of the blade away from the axial direction of the water tank are located in different radial directions of the cross section.

[0006] In the preferred technical solution of the above water retaining structure, the inclination direction of the blades is opposite to the rotation direction of the water-repelling member.

[0007] In a preferred technical solution of the above water retaining structure, the distance between two adjacent blades at one axial end close to the water tank is greater than the distance between two adjacent blades at one axial end away from the water tank.

[0008] In the preferred technical solution of the above water retaining structure, the blade comprises: an inclined section arranged in an inclined manner; and a shielding section connected to an axial end of the inclined section away from the water tank and extending toward the next blade.

[0009] In a preferred technical solution of the above water retaining structure, the water retaining structure further comprises a retaining ring, the retaining ring is located between two adjacent blades, and the projection of the water throwing outlet is located inside the retaining ring.

[0010] In a preferred technical solution of the above water retaining structure, in the axial direction of the water tank, the length between the two ends of the blade is greater than the length between the two ends of the air inlet.

[0011] In a preferred technical solution of the above water retaining structure, the water retaining structure further comprises an upper cover, the upper ends of the blades are connected to the upper cover, and the upper cover and the water tank are detachably connected.

[0012] In the preferred technical solution of the above water retaining structure, a limiting groove is provided on the inner wall of the water tank, the circumference of the limiting groove spans part of the air inlet, the upper cover is connected to a limiting flange, and the limiting flange is cooperatively connected to the limiting groove.

[0013] In the preferred technical solution of the above water retaining structure, a guide groove is formed on the upper end surface of the upper cover, and the guide groove is connected to the inside of the water tank.

[0014] In the preferred technical solution of the above water retaining structure, the water retaining structure further includes a reinforcing flange, and the lower ends of the blades are all connected to the reinforcing flange.

[0015] It can be understood by those skilled in the art that the water retaining structure of the present invention is provided with at least two blades, and there is a spacing between two adjacent blades, and from the axis of the water tank to the edge of the water tank, at least part of the blades are gradually tilted toward one side, so that the air coming in from the air inlet of the water tank is purified by contacting the water curtain through the spacing between the two blades. In addition, the water curtain generated by the rotation of the water-throwing member moves in a tangential direction, and the blades tilted toward one side prevent the water curtain from passing through the spacing between two adjacent blades, so that the water curtain will not be thrown out of the water tank, which is conducive to reducing the waste of water in the water tank, facilitating full contact between the air and the water curtain, and facilitating improving the efficiency of the water-washing air device.

[0016] In addition to the technical problems solved by the embodiments of the present invention described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by the embodiments of the present invention, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The preferred embodiment of the water retaining structure of the present invention will be described below with reference to the accompanying drawings and in combination with a steam ironing device. The accompanying drawings are:

[0018] Figure 1 It is a partial schematic diagram of a water-washed air device in the prior art;

[0019] Figure 2 A schematic diagram of the cooperation between a water retaining structure and a water tank provided according to an exemplary embodiment;

[0020] Figure 3 A schematic diagram of a water retaining structure provided according to an exemplary embodiment;

[0021] Figure 4 is a three-dimensional cross-sectional view of a water retaining structure provided according to an exemplary embodiment;

[0022] Figure 5 A partial three-dimensional cross-sectional view of a water retaining structure and a water tank provided according to an exemplary embodiment;

[0023] Figure 6 for Figure 5 Enlarged view at A.

[0024] In the attached figure:

[0025] 100, water tank; 101, air inlet; 200, water-shedding part;

[0026] 1. Water tank; 11. Air inlet; 12. Limiting groove;

[0027] 2. Water-removing parts;

[0028] 3. Water retaining structure;

[0029] 31, blade; 311, inclined section; 312, shielding section; 313, inclined surface;

[0030] 32. retaining ring;

[0031] 33. upper cover; 331. limiting flange; 332. guide groove;

[0032] 34. Strengthening flange; 341. Strengthening rib;

[0033] 4. The first blade;

[0034] 5. The second leaf. DETAILED DESCRIPTION

[0035] First, it should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art can make adjustments as needed to adapt to specific applications. For example, although the water retaining structure of the present invention is described in conjunction with a water-washing air device, this is not limiting, and other equipment with water retaining requirements can be configured with the water retaining structure of the present invention, such as a humidifier, air treatment equipment, etc.

[0036] Secondly, it should be noted that in the description of the present invention, terms such as "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0037] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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 those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] With the gradual development of air treatment equipment technology, air purification, humidification and other processing equipment are gradually applied to air conditioners or fresh air fans to improve user experience.

[0039] Figure 1 It is a partial schematic diagram of the water-washing air device of the prior art, such as Figure 1 As shown, the air is treated by a water-washing air device to improve the air quality; the water-washing air device includes a housing, a water tank 100, a fan and a water-spinning part 200, the water tank 100 is arranged on the housing, an air inlet 101 is arranged on the side wall of the water tank 100, an air outlet is arranged at the top of the water tank 100, the fan is connected to the water tank 100 to drive the air to enter the water tank 100 from the air inlet 101, and the air in the water tank 100 flows out from the air outlet. The water-spinning part 200 is arranged in the water tank 100, and the water-spinning part 200 can absorb the water in the water tank 100, and release the water in the water tank 100 after forming a water curtain, so as to form a water curtain in the water tank 100. During use, the air enters from the air inlet 101 and flows out from the air outlet. During the flow of the air in the water tank 100, the air will pass through the water curtain formed by the water-spinning part 200, thereby realizing the cleaning and purification of the air to improve the air quality.

[0040] When the above-mentioned water-washing air device is in use, the water-spinning component 200 tends to spin the water in the water tank 100 toward the air inlet 101 on the side wall of the water tank 100, so that the water is thrown out from the air inlet 101, causing a waste of water in the water tank 100 and affecting the user's experience.

[0041] Therefore, how to prevent the water curtain from being thrown out of the water tank 100 while ensuring that enough air enters the water tank 100 from the air inlet 101 is the technical problem to be solved by the present invention. It can be understood that the water-throwing member 200 is provided with a water-throwing hole, and the water in the water tank 100 enters the inside of the water-throwing member 200. After the water-throwing member 200 rotates, the water in the water-throwing member 200 is thrown outward from the water-throwing hole to form a water curtain. The water coming out of the water-throwing hole moves in a tangential direction. Then, if the water curtain moving in a tangential direction can be blocked or intercepted, the water curtain can be prevented from being thrown out from the air inlet 101.

[0042] The embodiment of the present invention provides a water retaining structure at the air inlet of the water tank, thereby preventing water from being thrown out from the air inlet, thereby improving the user experience.

[0043] The technical solution of the water retaining structure 3 according to the embodiment of the present invention is described below in combination with the above concepts.

[0044] Figure 2 FIG. 1 is a schematic diagram of a water retaining structure 3 and a water tank 1 according to an exemplary embodiment. Figure 2 As shown, the water retaining structure 3 is located in the water tank 1 and is used to shield the air inlet 11. That is, the water retaining structure 3 is connected to the inner wall of the water tank 1 and is located on the outside of the water-repelling member 2. Among them, "used to shield the air inlet 11" means that the water retaining structure 3 is arranged at the position of the air inlet 11, which can block the water curtain from entering the air inlet 11, but the air outside the water tank 1 can still enter the water tank 1 from the air inlet 11 and through the water retaining member. In other words, shielding the air inlet 11 should be understood in a broad sense, that is, the water retaining member can block the water curtain from passing through, but allows gas to pass through.

[0045] Figure 2 Schematic diagram of the cooperation between a water retaining structure 3 and a water tank 1 according to an exemplary embodiment. Figure 3 is a schematic diagram of a water retaining structure 3 provided according to an exemplary embodiment. Figure 4 FIG. 1 is a three-dimensional cross-sectional view of a water retaining structure 3 provided according to an exemplary embodiment, as shown in FIG. Figure 2-Figure 4 As shown, the water retaining structure 3 includes at least two blades 31, and there is a spacing between two adjacent blades 31. On a cross section perpendicular to the axial direction of the water tank 1, one end of the blade 31 facing the axial direction of the water tank 1 and the other end of the blade 31 away from the axial direction of the water tank 1 are located in different radial directions of the cross section.

[0046] For ease of description, the axial direction of the water tank 1 is taken as the height direction of the blade 31, and the circumferential direction of the water tank 1 is taken as the width direction of the blade 31. The cross section of the water tank 1 is the cross section obtained by cutting the blade 31 with a plane parallel to the upper end surface of the water tank 1. The length direction of the cross section is the length direction of the blade 31.

[0047] Among them, from the axis of the water tank 1 to the edge of the water tank 1, the cross section of at least part of the blade 31 is inclined toward one side, so that when looking from the outside of the water tank 1 toward the inside of the water tank 1, the end of the blade 31 away from the water-throwing part 2 can block the end of the blade 31 close to the water-throwing part 2, thereby increasing the probability of the water curtain hitting the side wall of the blade 31, so as to intercept the water curtain and prevent the water curtain from flying out.

[0048] Optionally, two adjacent blades 31 may be inclined in the same direction ( Figure 2-Figure 4 In the figure, the two blades 31 are tilted in the same direction as an example, but they can also be tilted in different directions. When the two blades 31 are tilted in the same direction, the distance between the two blades 31 is relatively large, which is convenient for air circulation, and the structure is relatively simple, which is conducive to processing and design; when the two blades 31 are tilted in opposite directions, the distance between the two blades 31 is relatively small, which is conducive to blocking the passage of the water curtain.

[0049] In summary, the water retaining structure 3 of the present invention is provided with at least two blades 31, and there is a spacing between two adjacent blades 31, and from the axis of the water tank 1 to the edge of the water tank 1, the blades 31 are at least partially gradually inclined toward one side, so that the air coming in from the air inlet 11 of the water tank 1 contacts the water curtain through the spacing between the two blades 31, and is purified. In addition, the water curtain generated by the rotation of the water-throwing member 2 moves in the tangential direction, and the blades 31 inclined toward one side block the water curtain from passing through the spacing between two adjacent blades 31, so that the water curtain will not be thrown out of the outside of the water tank 1, which is conducive to reducing the waste of water in the water tank 1, facilitating full contact between the air and the water curtain, and improving the efficiency of the water-washing air device.

[0050] In a possible implementation, the inclination direction of the blade 31 is opposite to the rotation direction of the water-shedding member 2. The inclination direction of the blade 31 refers to the position direction of the end of the blade 31 away from the water-shedding member 2 relative to the end of the blade 31 close to the water-shedding member 2. Figure 2-Figure 4 In the embodiment, the inclination directions of two adjacent blades 31 are the same, and the inclination direction of the blades 31 is in the clockwise direction. Therefore, in order to better shield the water curtain, the water-spinning member 2 can rotate counterclockwise.

[0051] In a possible implementation, the distance between two adjacent blades 31 at one end close to the axis of the water tank 1 is greater than the distance between two adjacent blades 31 at one end away from the axis of the water tank 1. That is, the blade 31 includes a first end and a second end, the first end is close to the axis of the water tank 1, and the second end is away from the axis of the water tank 1. The distance between the first ends of two adjacent blades 31 is greater than the distance between the second ends of the two blades 31, so as to better intercept the water curtain.

[0052] It is worth noting that the width of a blade (the projected length of the blade 31 along the circumference of the water tank 1) can be equal to or greater than the distance between the first ends of two adjacent blades 31. In other words, the second end of a blade can block the first end of the next blade. The next blade 31 refers to the next blade along the inclination direction of the blade 31. Specifically, Figure 4 The first blade 4 and the second blade 5 are arranged in a circle, wherein the second blade 5 is the next blade of the first blade 4 . When viewed from the outside of the water tank 1 into the water tank 1 , the first end of the second blade 5 is blocked by the second end of the first blade 4 .

[0053] In the above embodiment, the structure in which the second end of one blade can cover the first end of the next blade includes but is not limited to the following possible implementations:

[0054] In one possible implementation, Figure 2-Figure 4 In the embodiment, the blade 31 includes: an inclined section 311, which is arranged in an inclined manner; and a shielding section 312, which is connected to the end of the inclined section 311 away from the axial direction of the water tank 1 and extends toward the next blade 31. The end of the inclined section 311 close to the axis of the water tank 1 is the first end of the blade 31, and the end of the shielding section 312 away from the inclined section 311 is the second end of the blade 31. In this way, by providing the shielding section 312 to shield the first end of the next blade, not only the interception efficiency is improved, but also the length of the blade 31 can be reduced, making the overall structure more compact.

[0055] In another possible implementation, the blade 31 may only include the inclined section 311, and the width of the inclined section 311 may be wide enough to cover the first end of the next blade. In this way, the water curtain can be effectively intercepted, and the structure is simple and easy to process.

[0056] On the basis of the above embodiment, the water retaining structure 3 may further include a retaining ring 32, which is located between two adjacent blades 31, and the projection of the water-throwing outlet is located in the retaining ring 32, so as to intercept the water curtain thrown out from the water-throwing outlet. In addition, the retaining ring 32 can connect a plurality of blades 31 together, can strengthen the connection between a plurality of blades 31, and improve the stability and structural strength of the water retaining structure 3.

[0057] It is worth noting that, in the height direction of the blades 31, there is a certain distance between the upper and lower end surfaces of the retaining ring 32 and the upper and lower end surfaces of the blades 31, that is, the retaining ring 32 is connected to the middle position of a plurality of blades 31. More specifically, the retaining ring 32 is connected to the middle upper position of a plurality of blades 31. In this way, the water curtain can be blocked and the air outside the water tank 1 can be allowed to enter the water tank 1.

[0058] In a possible implementation, in the axial direction of the water tank 1, both ends of the blade 31 are longer than both ends of the air inlet 11. Or in the axial direction of the water tank 1, the length between the two ends of the blade 31 is greater than the length between the two ends of the air inlet 11.

[0059] It can be understood that the water curtain generated by the water-spinning member 2 is intercepted by the blade 31 or the retaining ring 32, and the water flow will flow down along the surface of the blade 31 or the retaining ring 32 into the water tank 1. Therefore, the lower part of the blade 31 needs to be lower than the air inlet 11 of the water tank 1 to prevent water from flowing to the outside of the water tank 1. In addition, the blade 31 is connected to the water tank 1 to block the air inlet 11, so in order to intercept the water curtain, in the axial direction of the water tank 1, the blade 31 must cross the air inlet 11 to ensure that the blade 31 can completely intercept the water curtain that is about to enter the air inlet 11.

[0060] In a possible embodiment, the portion of the lower end of the blade 31 that exceeds the air inlet 11 may have a slope 313. From the axis of the water tank 1 to the edge of the water tank 1, the slope 313 gradually slopes upward, so that the air entering from the air inlet 11 of the water tank 1 can be guided by the slope 313 and contact with the water deposited below the water tank 1 to be purified.

[0061] In a possible implementation, the inclined portion of the blade 31 may have a certain curvature. That is, the air entering from the air inlet 11 must first pass through the gap between two adjacent blades 31 before entering the water tank 1. The gap between two adjacent blades 31 has a guiding effect on the air, so the curvature is set to facilitate the air flow and reduce the resistance of the blade 31 to the air.

[0062] On the basis of the above embodiment, the water retaining structure 3 further includes an upper cover 33, the upper ends of the blades 31 are connected to the upper cover 33, and the upper cover 33 and the water tank 1 are detachably connected. The upper cover 33 is provided to connect all the blades 31 together so as to increase the overall structural strength of the water retaining structure 3. In addition, the connection between the upper cover 33 and the water tank 1 has the advantage of convenient installation compared with the blades 31 being directly connected to the water tank 1.

[0063] In addition, the connection between the upper cover 33 and the water tank 1 includes but is not limited to the following possible implementations:

[0064] In one possible implementation, Figure 5It is a partial three-dimensional cross-sectional view of a water retaining structure 3 and a water tank 1 provided according to an exemplary embodiment. Figure 6 for Figure 5 The enlarged view at A is as follows: Figure 5 and Figure 6 As shown, the inner wall of the water tank 1 is provided with a limiting groove 12, the circumference of the limiting groove 12 spans part of the air inlet 11, the upper cover 33 is connected to the limiting flange 331, and the limiting flange 331 is connected in cooperation with the limiting groove 12. Specifically, "the limiting flange 331 is connected in cooperation with the limiting groove 12" may mean that: the limiting groove 12 includes a bottom wall and two side walls, the limiting protrusion may be inserted into the limiting groove 12 from top to bottom, one side of the limiting protrusion abuts against a side wall of the limiting groove 12 close to the water-discharging part 2, and in addition, the edge of the upper cover 33 away from the water-discharging part 2 may abut against the inner wall of the water tank 1 (the other side wall of the limiting groove 12), so that they work together to limit the radial position of the upper cover 33.

[0065] In addition, the side wall of the water tank 1 may include an arc segment and a straight line segment, the water inlet may be opened on the arc segment of the water tank 1, the limiting groove 12 may be provided on the arc segment, and the limiting protrusion may also be provided in an arc shape, so that the circumference of the upper cover 33 is limited. The structure in which the limiting protrusion and the limiting groove 12 cooperate with each other not only does not require fasteners, but also facilitates and speeds installation.

[0066] In another possible implementation, the water tank 1 and the upper cover 33 may also be fixed by fasteners, wherein the fasteners include but are not limited to bolts, screws, fixing pins, etc.

[0067] In a possible implementation, a guide groove 332 is formed on the upper end surface of the upper cover 33 , and the guide groove 332 is connected to the interior of the water tank 1 , so that water falling on the top of the upper cover 33 can flow back into the interior of the water tank 1 under the action of the guide groove 332 .

[0068] In a possible embodiment, the water retaining structure 3 further includes a reinforcing flange 34, and the lower end of the blade 31 is connected to the reinforcing flange 34, so as to strengthen the connection strength between each blade 31 and improve the strength and stability of the water retaining structure. Among them, the reinforcing flange 34 is connected to a reinforcing rib 341, and the reinforcing rib 341 extends toward the water throwing part 2. The reinforcing rib 341 is connected to the lower end of the reinforcing flange 34, so as to collect the water intercepted by the blade 31 and the retaining ring 32.

[0069] In summary, the water retaining structure 3 of the present invention is provided with at least two blades 31, and there is a spacing between two adjacent blades 31, and from the axis of the water tank 1 to the edge of the water tank 1, the blades 31 are at least partially gradually inclined toward one side, so that the air coming in from the air inlet 11 of the water tank 1 contacts the water curtain through the spacing between the two blades 31, and is purified. In addition, the water curtain generated by the rotation of the water-throwing member 2 moves in the tangential direction, and the blades 31 inclined toward one side block the water curtain from passing through the spacing between two adjacent blades 31, so that the water curtain will not be thrown out of the outside of the water tank 1, which is conducive to reducing the waste of water in the water tank 1, facilitating full contact between the air and the water curtain, and improving the efficiency of the water-washing air device.

[0070] The terms "upper" and "lower" etc. are used to describe the relative position relationship of each structure in the accompanying drawings, which is only for the convenience of description and is not intended to limit the scope of implementation of the present invention. Changes or adjustments to the relative relationship shall be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0071] It should be noted that: in the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0072] In addition, in the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0073] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0074] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A water retaining structure for a water-washing air device, the water-washing air device comprising a water tank and a water-spinning member rotatably disposed in the water tank, the side wall of the water-spinning member being provided with a water-spinning port, the side wall of the water tank being provided with an air inlet, characterized in that: The water retaining structure is located in the water tank and is used to shield the air inlet. The water retaining structure includes at least two blades. There is a spacing between two adjacent blades. On a cross section perpendicular to the axial direction of the water tank, one end of the blade facing the axial direction of the water tank and one end of the blade away from the axial direction of the water tank are located in different radial directions of the cross section. The water retaining structure further comprises a retaining ring, the retaining ring is located between two adjacent blades, and the projection of the water throwing outlet is located inside the retaining ring; The retaining ring is connected to the middle and upper position of the plurality of blades; The portion of the lower end of the blade that exceeds the air inlet has an inclined surface, and the inclined surface is gradually inclined upward from the axis of the water tank to the edge of the water tank.

2. The water retaining structure according to claim 1, characterized in that: The inclination direction of the blades is opposite to the rotation direction of the water-spraying member.

3. The water retaining structure according to claim 1, characterized in that: The distance between two adjacent blades at one axial end close to the water tank is greater than the distance between two adjacent blades at one axial end far from the water tank.

4. The water retaining structure according to claim 3, characterized in that: The blade comprises: The inclined section is arranged in an inclined manner; The shielding section is connected to an axial end of the inclined section away from the water tank and extends toward the next blade.

5. The water retaining structure according to claim 1, characterized in that: In the axial direction of the water tank, the length between the two ends of the blade is greater than the length between the two ends of the air inlet.

6. The water retaining structure according to any one of claims 1 to 5, characterized in that: The water retaining structure further comprises an upper cover, the upper ends of the blades are connected to the upper cover, and the upper cover and the water tank are detachably connected.

7. The water retaining structure according to claim 6, characterized in that: The inner wall of the water tank is provided with a limiting groove, the circumference of the limiting groove spans part of the air inlet, the upper cover is connected to a limiting flange, and the limiting flange is cooperatively connected to the limiting groove.

8. The water retaining structure according to claim 6, characterized in that: The upper end surface of the upper cover is provided with a guide groove, and the guide groove is communicated with the interior of the water tank.

9. The water retaining structure according to claim 6, characterized in that: The water retaining structure further comprises a reinforcing flange, and the lower end of the blade is connected to the reinforcing flange.

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