Waterproof structure, air conditioner, and recreational vehicle

Abstract

The present invention relates to a waterproof structure, an air conditioner, and a recreational vehicle. The waterproof structure is used for a fan with an impeller arranged between a predetermined top or side air outlet and a motor, comprising: a cover waterproof structure, which is suitable for being formed in the top or side air outlet and includes a waterproof cover body and a cover water retaining ring extending downward from the outer periphery of the cover body or near the outer periphery; and a fan water retaining ring, which is configured to surround a central mounting portion of the impeller and extend from the central mounting portion toward the cover body to form a first predetermined axial gap between the fan water retaining ring and the cover body, wherein a projection of the fan water retaining ring on a surface perpendicular to the center line of the central mounting portion is located within a projection of the cover water retaining ring on the same surface and a predetermined radial gap is formed between the two, and the fan water retaining ring is configured to extend between the cover body and a straight line formed by any point on the outer edge of the cover water retaining ring close to the fan water retaining ring and a point on the outer periphery of the top or side air outlet that is the shortest distance away from any point.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a waterproof structure, an air conditioner, and a recreational vehicle. Background Art

[0002] A recreational vehicle (RV) is a mobile vehicle equipped with essential home amenities (such as bedding, stoves, toilets, air conditioning, and televisions). RVs can be easily parked in remote locations, such as beaches, lakeshores, meadows, hillsides, and forests, while still allowing users to conveniently enjoy an urban lifestyle. With rising living standards and the rapid development of the RV industry, people are increasingly demanding the functionality and comfort of RVs.

[0003] RV air conditioners conveniently deliver cool or heated air to the interior, regulating the temperature and humidity, providing a comfortable environment for passengers, reducing travel fatigue, and ensuring driving safety. RV air conditioners can be broadly categorized by their placement: roof-mounted, floor-mounted, and rear-mounted. As the name suggests, roof-mounted air conditioners are located on the roof of the RV; floor-mounted air conditioners, similar to ordinary cars, are located on the chassis; and rear-mounted air conditioners are located near the rear door. Due to the unique structure and limited space of RVs, RV air conditioners also have a unique design. To circumvent these limitations, the fan is configured to directly connect to the outside air environment. However, this configuration presents a problem: condensation and rainwater can easily enter the air conditioner, potentially flooding the motor or exposing it to humidity.

[0004] To waterproof RV air conditioners and protect the motor, existing technologies typically install the motor between the top or side air outlet and the fan. Multiple waterproof structures, such as a motor cover and a water retaining ring, are employed to ensure waterproof performance, improve motor reliability and lifespan, and ensure the proper operation of the motor that drives the RV air conditioner fan. However, this multi-layered waterproof structure is complex, making assembly difficult and manufacturing costs relatively high.

[0005] Therefore, this field needs a new technical solution to solve the above problems. Summary of the Invention

[0006] In order to solve the technical problems in the prior art of complex multiple waterproof structures, difficult assembly, and high processing and manufacturing costs, the present invention provides a waterproof structure. The waterproof structure is used for a fan in which an impeller is arranged between a predetermined top or side air outlet and a motor, the waterproof structure comprising: a cover waterproof structure, which is suitable for being formed in the top or side air outlet and comprises a waterproof cover body and a cover water retaining ring extending downward from the outer periphery of the cover body or close to the outer periphery; and a fan water retaining ring, the fan water retaining ring being configured to surround the central mounting portion of the impeller and extend from the central mounting portion toward the cover body to form a first predetermined axial gap between the fan water retaining ring and the cover body, the projection of the fan water retaining ring on a surface perpendicular to the center line of the central mounting portion is located within the projection of the cover water retaining ring on the same surface and a predetermined radial gap is formed between the two, the fan water retaining ring is configured to extend between the cover body and a straight line, the straight line being formed by any point on the outer edge of the cover water retaining ring close to the fan water retaining ring and a point on the outer periphery of the top or side air outlet that is the shortest distance away from the any point.

[0007] The waterproof structure of the present invention is suitable for air conditioners with top or side air outlets, wherein the fan impeller and motor are arranged between the top or side air outlet and the motor. The impeller is arranged between the top or side air outlet and the motor, positioning the motor away from the air outlet to better protect it. Furthermore, since the motor is not obstructed by the impeller during installation, this reduces the difficulty of fan assembly. The waterproof structure comprises a cover waterproof structure and a fan water retainer. The cover waterproof structure is formed within the top or side air outlet and comprises a waterproof cover body and a cover water retainer extending downward from or near the outer periphery of the cover body. The fan water retainer surrounds the central mounting portion of the impeller and extends from the central mounting portion toward the cover body. The cover waterproof structure prevents rainwater and other substances from entering the motor through the air outlet and affecting its operation. A first predetermined axial gap is formed between the fan water retainer and the cover body. Furthermore, the projection of the fan water retainer on a surface perpendicular to the centerline of the central mounting portion lies within the projection of the cover water retainer on the same surface, forming a predetermined radial gap between the two. The setting of the first predetermined axial gap and the predetermined radial gap ensures that the fan water retaining ring will not contact the cover water retaining ring, thereby preventing the cover water retaining ring from interfering with the rotation of the impeller. The fan water retaining ring is configured to extend between the cover body and a straight line, which is composed of any point on the outer edge of the cover water retaining ring close to the fan water retaining ring and a point on the outer periphery of the top or side air outlet that is the shortest distance away from any point. This straight line is the boundary with the minimum possibility for rainwater to enter the motor. As long as the fan water retaining ring extends beyond this straight line toward the cover water retaining ring, rainwater and the like cannot enter the motor through the gap between the cover water retaining ring and the fan water retaining ring, thereby achieving the purpose of waterproofing the motor. In addition, the present invention adds a structure to the original waterproof structure, but does not add new components, which saves costs while ensuring waterproof performance.

[0008] In a preferred embodiment of the waterproof structure, the waterproof structure further includes a condensation trough adapted to be formed in the central mounting portion and at least one drainage hole located at the bottom of the condensation trough. The condensation trough is configured to surround the shaft hole boss located at the center of the central mounting portion and has a predetermined depth from the bottom to the top of the shaft hole boss. The combination of the condensation trough and drainage hole allows condensed water to fall into the condensation trough after formation and then flow out through the drainage hole located at the bottom of the condensation trough, thereby preventing condensed water from accumulating in the central mounting portion and affecting the operation of the motor.

[0009] In a preferred embodiment of the waterproof structure, the drain hole is formed at the intersection of the bottom of the condensate trough and the sidewall of the central mounting portion. This arrangement generates centrifugal force during fan rotation, causing condensed water in the condensate trough to be thrown to the sidewall of the central mounting portion and then flow out of the drain hole.

[0010] In the preferred technical solution of the above waterproof structure, the cover water retaining ring and the fan water retaining ring have the same center line. Through the above arrangement, the waterproof structure can have a better waterproof effect and a mutually symmetrical structure.

[0011] In the preferred technical solution of the waterproof structure, the cover water retaining ring and the fan water retaining ring both have circular cross sections perpendicular to the center line. The cover water retaining ring and the fan water retaining ring with circular cross sections have simple structures and are therefore easier to manufacture.

[0012] In the preferred technical solution of the above waterproof structure, the cover water retaining ring is integrally injection molded with the cover body, which simplifies the manufacturing process, reduces processing costs, and ensures a stable and firm connection between the cover body and the cover water retaining structure.

[0013] In the preferred technical solution of the above waterproof structure, the fan water retaining ring is suitable for being integrally injection molded with the impeller. This integral molding can simplify the manufacturing process, reduce processing costs, and ensure a stable and firm connection between the impeller and the fan water retaining structure.

[0014] In a preferred technical solution of the aforementioned waterproof structure, an annular protrusion extending toward the fan water deflector is provided on a surface of the cover body facing the fan water deflector, and a second predetermined axial gap is separated from the fan water deflector by the annular protrusion. This arrangement strengthens the structure of the cover body, and the provision of the second predetermined axial gap prevents the fan water deflector from contacting the annular protrusion during fan rotation.

[0015] In the preferred technical solution of the above waterproof structure, the annular protrusion is concentric with the cover water retaining ring. Through the above arrangement, the waterproof structure can have better waterproof performance and a regular structure.

[0016] In order to solve the technical problems in the prior art of the complexity of multiple waterproof structures, difficulty in assembly, and high processing and manufacturing costs, the present invention also provides an air conditioner. The air conditioner includes a top or side air outlet; a fan having an impeller and a motor for driving the impeller to rotate, the impeller being arranged between the top or side air outlet and the motor, the impeller having a central mounting portion for accommodating the rotating shaft of the motor; a waterproof structure, the cover waterproof structure of the waterproof structure is formed in the top or side air outlet, and the fan water retaining ring of the waterproof structure is configured to surround the central mounting portion. By adopting any of the waterproof structures described above, the air conditioner of the present invention does not add new components, but only adds a new structure to the original waterproof structure, thereby saving costs while ensuring the waterproof performance and stable operation of the air conditioner.

[0017] To address the technical issues of the prior art, such as the complex multiple waterproof structures, difficult assembly, and high manufacturing costs, the present invention further provides a recreational vehicle. The recreational vehicle includes the aforementioned air conditioner. By employing the aforementioned air conditioner, the recreational vehicle of the present invention can prevent rainwater from entering the air conditioner, thereby preventing it from supplying cool or hot air to the interior of the vehicle, and thereby regulating the temperature and humidity within the vehicle compartment.

[0018] Solution 1. A waterproof structure, which is used for a fan in which an impeller is arranged between a predetermined top or side air outlet and a motor, characterized in that the waterproof structure includes: a cover waterproof structure, which is suitable for being formed in the top or side air outlet and includes a waterproof cover body and a cover water retaining ring extending downward from the outer periphery of the cover body or near the outer periphery; and a fan water retaining ring, the fan water retaining ring is configured to surround the central mounting portion of the impeller and extend from the central mounting portion toward the cover body to form a first predetermined axial gap between the fan water retaining ring and the cover body, the projection of the fan water retaining ring on a surface perpendicular to the center line of the central mounting portion is located within the projection of the cover water retaining ring on the same surface and a predetermined radial gap is formed between the two, and the fan water retaining ring is configured to extend between the cover body and a straight line, the straight line being formed by any point on the outer edge of the cover water retaining ring close to the fan water retaining ring and a point on the outer periphery of the top or side air outlet that is the shortest distance away from the any point.

[0019] Solution 2. The waterproof structure according to Solution 1 is characterized in that the waterproof structure also includes a condensation water trough suitable for being formed in the central mounting portion and at least one drain hole located at the bottom of the condensation water trough, the condensation water trough is configured to surround the axial hole boss located at the center of the central mounting portion, and the condensation water trough has a predetermined depth from the bottom to the top of the axial hole boss.

[0020] Solution 3. The waterproof structure according to Solution 2 is characterized in that the water drop hole is formed at the connection between the bottom of the condensation water tank and the side wall of the central mounting portion.

[0021] Solution 4. The waterproof structure according to Solution 1 is characterized in that the cover water retaining ring and the fan water retaining ring have the same center line.

[0022] Solution 5. The waterproof structure according to Solution 4 is characterized in that the cover water retaining ring and the fan water retaining ring both have a circular cross-section perpendicular to the center line.

[0023] Solution 6. The waterproof structure according to Solution 1 is characterized in that the cover water retaining ring and the cover body are injection molded as one piece.

[0024] Solution 7. The waterproof structure according to Solution 1 is characterized in that the fan water retaining ring is suitable for being injection molded as one piece with the impeller.

[0025] Solution 8. The waterproof structure according to Solution 1 is characterized in that an annular protrusion extending toward the fan water retaining ring is provided on the surface of the cover body facing the fan water retaining ring, and the annular protrusion is separated from the fan water retaining ring by a second predetermined axial gap.

[0026] Solution 9. The waterproof structure according to Solution 8 is characterized in that the annular protrusion is concentric with the cover water retaining ring.

[0027] Solution 10. An air conditioner, characterized in that the air conditioner includes: a top or side air outlet; a fan having an impeller and a motor for driving the impeller to rotate, the impeller being arranged between the top or side air outlet and the motor, the impeller having a central mounting portion for accommodating a rotating shaft of the motor; a waterproof structure according to any one of Solutions 1-9, a cover waterproof structure of the waterproof structure is formed in the top or side air outlet, and a fan water retaining ring of the waterproof structure is configured to surround the central mounting portion.

[0028] Solution 11. A recreational vehicle, characterized in that the recreational vehicle includes: an air conditioner according to Solution 10. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0030] Figure 1 1 is a schematic structural diagram of an embodiment of an air conditioner of the present invention;

[0031] Figure 2 1 is a schematic cross-sectional view of an embodiment of an air conditioner according to the present invention taken along section line AA;

[0032] Figure 3 yes Figure 2 A partial enlarged view of part B of an embodiment of the air conditioner of the present invention is shown;

[0033] Figure 4 1 is a schematic structural diagram of an embodiment of a motor in an air conditioner of the present invention;

[0034] Figure 5 1 is a schematic structural diagram of an embodiment of an impeller in an air conditioner according to the present invention;

[0035] Figure 6 yes Figure 5 The enlarged partial view of the portion E of the embodiment of the impeller in the air conditioner of the present invention is shown;

[0036] Figure 7 is a longitudinal cross-sectional schematic diagram of an embodiment of the waterproof structure of the present invention;

[0037] Figure 8 It is a schematic transverse cross-sectional view of an embodiment of the waterproof structure of the present invention.

[0038] List of reference numerals:

[0039] 10. Air conditioner; 20. Housing; 21. Top cover; 211. Top air outlet; 2111. Outer periphery of air outlet; 2112. Grille; 2113. Reinforced protrusion; 22. Bottom plate; 23. Inner cavity; 30. Fan; 31. Impeller; 311. Center mounting portion; 3111. Shaft hole; 3112. Outer wall; 3113. Inner wall; 3114. Mounting groove; 31141. Conical groove; 3115. Upper end surface; 3116. Shaft hole boss; 31161. Top of shaft hole boss; 3117. Connection; 312. Fan blade; 32. Motor; 321. Motor body; 3211. Fixing portion; 3212. Screw; 322. Rotating shaft; 3221. Threaded portion; 3 222. Mounting part; 323. Fixing piece; 33. Fan bracket; 331. Upper part; 3311. Annular wall; 332. Lower part; 333. Motor mounting part; 40. Waterproof structure; 41. Cover waterproof structure; 411. Cover body; 4111. Upper side; 4112. Lower side; 4113. Outer periphery of cover; 4114. Annular protrusion; 412. Cover water retaining ring; 4121. Outer side of cover water retaining ring; 4122. Inner side of cover water retaining ring; 4123. Lower edge; 42. Fan water retaining ring; 421. Upper edge; 422. Outer side of fan water retaining ring; 423. Inner side of fan water retaining ring; 43. Condensate tank; 431. Bottom; 432. Drain hole. DETAILED DESCRIPTION

[0040] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. 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.

[0041] It should be noted that in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. These terms are used solely for ease of description and are not intended to indicate or imply that the device or component described must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "installed," "disposed," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0043] In order to solve the technical problems in the prior art of the complexity of multiple waterproof structures, difficulty in assembly, and high processing and manufacturing costs, the present invention provides a waterproof structure 40. The waterproof structure 40 is used for a fan 30 in which an impeller 31 is arranged between a predetermined top air outlet 211 or a side air outlet and a motor 32. The waterproof structure 40 includes: a cover waterproof structure 41, which is suitable for being formed in the top air outlet 211 or the side air outlet, and includes a waterproof cover body 411 and a cover water retaining ring 412 extending downward from the outer periphery 4113 of the cover or close to the outer periphery 4113; and a fan water retaining ring 42, which is configured to surround the central mounting portion 311 of the impeller 31 and extend from the central mounting portion 311 toward the cover body 411. , so as to form a first predetermined axial gap H1 between the fan water retaining ring 42 and the cover body 411, the projection of the fan water retaining ring 42 on the surface perpendicular to the center line C of the central mounting portion 311 is located within the projection of the cover water retaining ring 412 on the same surface and a predetermined radial gap D is formed between the two, and the fan water retaining ring 42 is configured to extend between the cover body 411 and a straight line L, which is composed of any point on the outer edge of the cover water retaining ring 412 close to the fan water retaining ring 42 and a point on the outer periphery 2111 of the air outlet that is the shortest distance away from any point.

[0044] Figure 1 1 is a schematic structural diagram of an embodiment of an air conditioner of the present invention; Figure 2 1 is a schematic cross-sectional view of an embodiment of an air conditioner according to the present invention taken along section line AA; Figure 3 yes Figure 2 A partial enlarged view of part B of an embodiment of the air conditioner of the present invention is shown; Figure 4 1 is a schematic structural diagram of an embodiment of a motor in an air conditioner of the present invention; Figure 5 1 is a schematic structural diagram of an embodiment of an impeller in an air conditioner according to the present invention; Figure 6 yes Figure 5 The figure is a partial enlarged view of part E of an embodiment of the impeller in the air conditioner of the present invention.

[0045] like Figure 1 As shown, in one or more embodiments, the air conditioner 10 of the present invention includes a housing 20, which includes a top cover 21 and a bottom plate 22 that match each other. The top cover 21 and the bottom plate 22 can be injection molded using a suitable resin material (such as ABS, PP, etc.) and then fixed together. The fixing method includes but is not limited to screwing, clamping, etc. The top cover 21 and the bottom plate 22 together form an inner cavity 23 that can accommodate other functional components. Figure 1 and Figure 2As shown, in one or more embodiments, a top air outlet 211 is formed on the top cover 21 to facilitate exhaust. The top air outlet 211 is circular in shape. Alternatively, the top air outlet 211 may also be configured to be square or other suitable shapes. A grille 2112 having the same center of circle as the top air outlet 211 is formed on the top air outlet 211. The provision of the grille 2112 can enhance the structural strength of the top air outlet 211, and can also prevent foreign matter from entering the air conditioner 10 and affecting the normal operation of the air conditioner 10. In one or more embodiments, the grille 2112 is integrally formed with the top cover 21 to simplify the manufacturing process, and can also ensure a stable and firm connection between the top cover 21 and the grille 2112. Alternatively, the top cover 21 and the grille 2112 may also be processed separately and then fixed together. Fixing methods include but are not limited to snap-on, screw-on, etc. As Figure 2 As shown, the connection between the grille 2112 and the top cover 21 forms the air outlet periphery 2111. A reinforcement protrusion 2113 extending toward one side of the inner cavity 23 is formed on the air outlet periphery 2111. The reinforcement protrusion 2113 enhances the structural strength of the air outlet periphery 2111. In an alternative embodiment, the air conditioner 10 of the present invention adopts a side-discharge configuration. Accordingly, the housing 20 is configured to include sidewalls with side air outlets formed thereon, replacing the top air outlet 211.

[0046] like Figure 2 As shown, in one or more embodiments, a fan 30 is provided in the inner cavity 23 of the housing 20. The fan 30 is provided below the top air outlet 211. The fan 30 includes an impeller 31, a motor 32 for driving the impeller 31 to rotate, and a fan bracket 33 for mounting the fan 30. Figure 2 As shown, in one or more embodiments, the fan bracket 33 is arranged between the top cover 21 and the bottom plate 22, and has an upper portion 331 close to the top cover 21 and a lower portion 332 close to the bottom plate 22. Figure 2 As shown, in one or more embodiments, the upper portion 331 is formed with a circle of annular walls 3311 spaced apart from the top cover 21. The annular wall 3311 is located on the inner side of the reinforcing protrusion 2113, has the same center line C as the reinforcing protrusion 2113, and has a smaller diameter than the reinforcing protrusion 2113. The vertical projection of the annular wall 3311 on a plane perpendicular to the center line C partially overlaps with the vertical projection of the reinforcing protrusion 2113 on the same plane. The lower portion 332 rests on the bottom plate 22 and is fixed to the bottom plate 22, and the fixing method includes but is not limited to clipping, screwing, etc. A motor mounting portion 333 is formed on the side of the lower portion 332 facing the top air outlet 211.

[0047] like Figure 2-Figure 4As shown, in one or more embodiments, the motor 32 is mounted on the motor mounting portion 333. The motor 32 includes a motor body 321 fixed on the motor mounting portion 333 and a rotating shaft 322 connected to the motor body 321 and facing the top air outlet 211. A fixing portion 3211 is formed on the motor body 321. The fixing portion 3211 abuts against the motor mounting portion 333 and can be fixed to the motor mounting portion 333 by a screw 3212. Alternatively, the fixing portion 3211 can also be fixed to the motor mounting portion 333 in other ways, such as clamping. Preferably, the rotating shaft 322 includes a mounting portion 3222 close to one side of the motor body 321 and a threaded portion 3221 connected to the mounting portion 3222. The mounting portion 3222 and the threaded portion 3221 are integrally formed.

[0048] like Figure 2-Figure 6 As shown, in one or more embodiments, the impeller 31 is installed between the motor 32 and the top air outlet 211. The impeller 31 includes a central mounting portion 311 and four mutually spaced blades 312 connected to the outer side wall 3112 of the central mounting portion 311 and extending radially outward. The central mounting portion 311 can be integrally formed with the blades 312 using a suitable resin material (such as ABS, PP, etc.), or they can be injection molded separately and then fixed together, and the fixing methods include but are not limited to screwing, clamping, etc. Alternatively, the number of blades 312 can also include other numbers besides 4, such as 3, 5, etc.

[0049] like Figure 3 As shown, an axial hole boss 3116 is formed in the center of the central mounting portion 311. The axial hole boss 3116 can be integrally formed with the central mounting portion 311 by injection molding. An axial hole 3111 is formed in the axial hole boss 3116, extending along the center line C and penetrating the axial hole boss 3116. The rotating shaft 322 is fixed in the axial hole 3111, and relative rotation cannot occur between the rotating shaft 322 and the axial hole 3111. When the rotating shaft 322 rotates, it drives the impeller 31 to rotate. A mounting groove 3114 is formed in the central mounting portion 311 along the center line C and inwardly toward the axial hole boss 3116. The threaded portion 3221 of the rotating shaft 322 extends through the axial hole 3111 into the mounting groove 3114, and fixes the impeller 31 to the rotating shaft 322 by engaging with the fixing member 323 formed with a thread. When the central mounting portion 311 is assembled onto the rotating shaft 322, the fixing member 323 abuts against the top 31161 of the shaft hole boss 3116 on the side facing the top or air outlet 211. The threaded portion 3221 and the fixing member 323 cooperate to prevent the impeller 31 from disengaging from the rotating shaft 322 during rotation due to the lack of a stop, thereby damaging the fan 30. In one or more embodiments, the mounting groove 3114 is a tapered groove 31141 that opens toward the top air outlet 211 and gradually increases in size.

[0050] Figure 7 is a longitudinal cross-sectional schematic diagram of an embodiment of the waterproof structure of the present invention; Figure 8 The waterproof structure 40 can be used in any of the above-mentioned embodiments of the air conditioner 10. Figures 1-8 The waterproof structure 40 will be described.

[0051] like Figure 3 As shown, in one or more embodiments, the waterproof structure 40 includes a cover waterproof structure 41 formed in the top air outlet 211 and a fan water retaining ring 42 formed on the impeller 31. The cover waterproof structure 41 includes a cover body 411 formed in the top air outlet 211 and a cover water retaining ring 412. The cover body 411 is a circular flat plate connected to the grille 2112 and sharing the same centerline with the grille 2112. The cover body 411 and the grille 2112 can be integrally formed or separately injection molded and then secured together using methods including, but not limited to, screwing or snap-fitting. Alternatively, the cover body 411 can be square or other suitable shapes. The cover body 411 has an upper side 4111 facing the exterior of the air conditioner 10 and a lower side 4112 facing the impeller 31. The cover water retaining ring 412 is formed on the lower side 4112 and is an annular protrusion extending downward from a cover outer periphery 4113 away from the cover centerline. The cover water retaining ring 412 has an outer side surface 4121 of the cover water retaining ring and an inner side surface 4222 of the cover water retaining ring that are opposite to each other and surround the center line C, as well as a lower edge 4123 away from the cover body 411. In one or more embodiments, the cover water retaining ring 412 has the same center line as the cover body 411 and has a circular ring cross-section perpendicular to the center line C. An annular protrusion 4114 extending toward the impeller 31 is also formed on the lower side 4112 to strengthen the structural strength of the cover body 411. The annular protrusion 4114 is arranged on the inner side of the cover water retaining ring 412. Alternatively, the annular protrusion 4114 is arranged on the outer side of the cover water retaining ring 412. The annular protrusion 4114 is a closed ring, concentric with the cover water retaining ring 412, and radially spaced apart from the cover water retaining ring 412. Alternatively, the annular protrusion 4114 may be a plurality of arc-shaped protrusions spaced apart from each other and having the same center and radius. The annular protrusion 4114 may also be in any shape as long as it does not interfere with the fan 30 .

[0052] like Figure 3 As shown, in one or more embodiments, the fan water retaining ring 42 is a circular ring extending from the upper end surface 3115 of the impeller 31 toward the cover body 411, surrounding the central mounting portion 311, and having a circular cross-section perpendicular to the centerline C. The fan water retaining ring 42 has an upper edge 421 close to the lower edge 4123 of the cover water retaining ring 412, and an outer side surface 422 of the fan water retaining ring and an inner side surface 423 of the fan water retaining ring opposite and surrounding the centerline C. Figure 7 and Figure 8As shown, the upper edge 421 is configured to extend between the cover 411 and the straight line L. Figure 7 As shown, the straight line L is formed by any point on the lower edge 4123 of the cover water retaining ring 412 close to the fan water retaining ring 42 and a point on the outer periphery 2111 of the air outlet that is the shortest distance away from any point on the lower edge 4123. The fan water retaining ring 42 and the cover water retaining ring 412 have the same center line C. Figure 7 As shown, a first predetermined axial gap H1 is formed between the upper edge 421 of the fan water retaining ring 42 and the lower side 4112 of the cover body 411, and a second predetermined axial gap H2 is formed between the upper edge 421 of the fan water retaining ring 42 and the annular protrusion 4114. Figure 8 As shown, the projection of the fan water retaining ring 42 on the plane perpendicular to the center line C is located within the projection of the cover water retaining ring 412 on the same surface, and a predetermined radial gap D is formed between the two. The predetermined radial gap D is the radial distance from the outer side surface 422 of the fan water retaining ring to the inner side surface 4122 of the cover water retaining ring. The setting of the predetermined radial gap D can prevent rainwater falling on the cover water retaining ring 412 from falling into the fan water retaining ring 42. The predetermined radial gap D, the first predetermined axial gap H1 and the second predetermined axial gap H2 together can prevent the impeller 31 from colliding with the annular protrusion 4114 and the cover water retaining ring 412 during rotation. The predetermined radial gap D, the first predetermined axial gap H1 and the second predetermined axial gap H2 can be set to any value respectively, as long as it prevents collision and can achieve waterproofing.

[0053] like Figure 3 and Figure 6 As shown, in one or more embodiments, the waterproof structure 40 further includes a condensation trough 43 and a drainage hole 432 located at the bottom 431 of the condensation trough 43. The condensation trough 43 comprises at least a portion of the mounting groove 3114. The bottom of the mounting groove 3114 is spaced a predetermined depth from the top 31161 of the shaft hole boss, and the bottom of the mounting groove 3114 forms the bottom 431 of the condensation trough 43. The predetermined depth of the condensation trough 43 corresponds to the height of the protrusion of the shaft hole boss 3116. The condensation trough 43, with a predetermined depth, can accommodate condensed water or other moisture. In one or more embodiments, three drainage holes 432 are formed at the junction 3117 where the bottom 431 of the condensation trough 43 intersects the inner sidewall 3113 of the central mounting portion 311, spaced circumferentially from each other. Alternatively, the number of drainage holes 432 may be other than three, such as two or four. When the fixing member 323 assembles the central mounting portion 311 on the rotating shaft 322, the condensed water and the like at the bottom of the condensed water tank 43 flows out from the drain hole 432 provided at the bottom 431 of the condensed water tank 43, preventing the condensed water and the like from accumulating at the connection part between the fixing member 323 and the rotating shaft 322 and affecting the normal operation of the motor.

[0054] In one or more embodiments, the present invention further provides a motorhome (not shown in the figure). The motorhome includes a roof (not shown in the figure) and the air conditioner 10 described in any of the above embodiments. The air conditioner 10 can be arranged on the roof or on the back of the motorhome. When the air conditioner 10 is arranged on the roof, the top air outlet 211 is parallel to the roof. When the air conditioner 10 is located at the back of the motorhome, the side air outlet is parallel to the back of the motorhome. By adopting the air conditioner 10 described above, the motorhome of the present invention can prevent rainwater outside the motorhome from entering the air conditioner 10, thereby affecting the air conditioner 10 to deliver cold air or hot air to the motorhome, and adjust the temperature and humidity in the car.

[0055] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A waterproof structure for a fan with an impeller arranged between a predetermined top or side air outlet and a motor, characterized in that: The waterproof structure comprises: a waterproof cover structure adapted to be formed in the top or side air outlet and comprising a waterproof cover body and a cover water retaining ring extending downward from or near the periphery of the cover body; and A fan water retaining ring, the fan water retaining ring is configured to surround the central mounting portion of the impeller and extend from the central mounting portion toward the cover body, and extend between the cover body and a straight line, wherein the straight line is composed of any point on the outer edge of the cover water retaining ring close to the fan water retaining ring and a point on the outer periphery of the top or side air outlet that is the shortest distance away from the any point, so as to form a first predetermined axial gap between the fan water retaining ring and the cover body; and, the projection of the fan water retaining ring on the surface perpendicular to the center line of the central mounting portion is located within the projection of the cover water retaining ring on the same surface and a predetermined radial gap is formed between the two, the cover water retaining ring and the fan water retaining ring have the same center line, and the cover water retaining ring and the fan water retaining ring both have a circular cross-section perpendicular to the center line.

2. The waterproof structure according to claim 1, characterized in that: The waterproof structure also includes a condensation water trough suitable for being formed in the central mounting portion and at least one water droplet located at the bottom of the condensation water trough, the condensation water trough being configured to surround the axial hole boss located at the center of the central mounting portion, and the condensation water trough having a predetermined depth from the bottom to the top of the axial hole boss.

3. The waterproof structure according to claim 2, characterized in that: The water drop hole is formed at a junction of the bottom of the condensation water tank and the side wall of the central mounting portion.

4. The waterproof structure according to claim 1, characterized in that: The cover water retaining ring and the cover body are integrally injection-molded.

5. The waterproof structure according to claim 1, characterized in that: The fan water retaining ring is suitable for being integrally injection-molded with the impeller.

6. The waterproof structure according to claim 1, characterized in that: An annular protrusion extending toward the fan water retaining ring is provided on a surface of the cover body facing the fan water retaining ring, and the annular protrusion and the fan water retaining ring are spaced apart by a second predetermined axial gap.

7. The waterproof structure according to claim 6, characterized in that: The annular protrusion is concentric with the cover water retaining ring.

8. An air conditioner, characterized in that: The air conditioner comprises: Top or side air outlet; A fan having an impeller and a motor for driving the impeller to rotate, wherein the impeller is arranged between the top or side air outlet and the motor, and the impeller has a central mounting portion for accommodating a rotating shaft of the motor; According to the waterproof structure according to any one of claims 1 to 7, the cover waterproof structure of the waterproof structure is formed in the top or side air outlet, and the fan water retaining ring of the waterproof structure is configured to surround the central mounting portion.

9. A recreational vehicle, characterized in that: The RV includes: The air conditioner according to claim 8.

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