Top air replacement device for a house car

Abstract

The application discloses a roof replacement air device for a house car, an inner frame body is connected in an opening of a roof, the inner frame body has an air replacement channel; a roof cover is connected on the roof in a lifting mode, a rotating mechanism is rotatably connected on the inner frame body; a fan is connected on the rotating mechanism and can rotate on the rotating mechanism, the fan can rotate forward or reversely to adjust an air replacement mode; in a first position, the fan is located in the air replacement channel, in a second position, the fan is hung in the car and leaves the air replacement channel, in the second position, the fan rotates on the rotating mechanism to adjust a blowing direction of the fan; the rotating mechanism rotates to drive the fan to switch between the first position and the second position. The roof replacement air device for the house car adopts the fan which is movable relative to the roof, the fan can accelerate the exchange of air in the car and air outside in the first position, the fan can be closed to realize natural convection air replacement between the car and the outside in the second position, meanwhile, the fan can also blow air in the car in the second position.

Description

Technical Field

[0001] This invention relates to the field of motorhomes, specifically to the sunroof of motorhomes, and more particularly to a roof-mounted ventilation device for motorhomes. Background Technology

[0002] As people's living standards improve, more and more people are pursuing more comfortable and freer travel experiences, and RVs perfectly meet this demand. An RV is a new type of transportation that combines the functions of a house and a car, making it an ideal choice for travel. Sunroofs have become an indispensable accessory for RVs. Installed on the roof, the sunroof's main function is to allow air circulation inside the vehicle, increasing the intake of fresh air and providing the owner with a healthy and comfortable experience.

[0003] Patent application CN202310882389.6 discloses a sunroof for RVs, in which a fixed ventilation fan is installed to enable air convection between the interior and exterior of the vehicle, thereby achieving vehicle ventilation. However, because the ventilation fan is fixed to the sunroof, it needs to be turned on to achieve a good ventilation effect, but the ventilation fan is noisy during operation, affecting the user experience. Furthermore, when the ventilation fan is off, its placement obstructs natural air convection, resulting in good ventilation only when the ventilation fan is running. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: in order to solve the problem that the sunroof of the existing RV can only achieve a good ventilation effect when the ventilation fan is turned on, the present invention provides a roof ventilation device for RV. By setting a fan that can move relative to the roof, the fan can accelerate the exchange of air between the inside and outside of the vehicle in a first position, and can be turned off in a second position to achieve natural convection ventilation between the inside and outside of the vehicle. At the same time, the fan can also blow air into the vehicle in the second position like a conventional fan.

[0005] The technical solution adopted by this invention to solve its technical problem is: a roof-mounted ventilation device for RVs, comprising: An inner frame, which is connected to an opening in the roof, has a ventilation channel; The roof, which is retractable and connected to the roof of the vehicle, allows the ventilation duct to connect with the external environment when raised, and isolates the ventilation duct from the external environment when lowered. Fan assembly, the fan assembly comprising: A rotating mechanism, which is rotatably connected to the inner frame; A fan, which is connected to a rotating mechanism and can rotate on the rotating mechanism, wherein the fan (32) can rotate forward or backward to adjust the ventilation mode; The fan has a first position and a second position. In the first position, the fan is located inside the ventilation channel. In the second position, the fan is suspended inside the vehicle and away from the ventilation channel. In the second position, the fan rotates on a rotating mechanism to adjust the airflow direction. The rotating mechanism rotates to drive the fan to switch between the first position and the second position.

[0006] This invention relates to a roof-mounted ventilation device for RVs, which includes a movable fan that can switch between a first position and a second position. In the first position, the fan can be turned on to accelerate the ventilation effect inside and outside the vehicle. In the second position, the fan can be turned off, and natural convection ventilation can be achieved through the ventilation channel. At the same time, in the second position, the fan can be rotated to blow air into the vehicle, thus serving as an electric fan to meet the ventilation needs of the users inside the vehicle.

[0007] Furthermore, to provide a switching method for the fan between a first position and a second position, the rotation mechanism includes: A hinge assembly connected to the inner frame; A swing arm, which is connected to a hinge assembly, and the swing arm rotates relative to the inner frame via the hinge assembly; The fan is attached to the swing arm and can rotate on the swing arm.

[0008] Further, the hinge assembly includes: A hinge base, which is connected to the inner frame; A damping hinge, wherein the damping hinge is connected between the hinge seat and the swing arm; A limiting seat, which is connected to a hinged seat, has multiple limiting holes facing the fan; A spring-loaded positioning ball is mounted on the swing arm and is embedded in a limiting hole to fix the fan's hovering position. This allows the fan to rotate relative to the inner frame and hover inside the vehicle, preventing fan swaying while the vehicle is in motion.

[0009] Furthermore, a bearing is fixedly connected to the end of the swing arm away from the hinge assembly. The bearing has evenly spaced limiting grooves along its circumference. The fan housing is rotatably connected to the bearing. A spring-loaded positioning ball is located on the inner side of the housing. When the housing rotates around the bearing, the spring-loaded positioning ball engages with the limiting groove to fix the fan's circumferential rotation position. Thus, the fan can rotate in the second position to meet the airflow needs inside the vehicle, and the fan rotation angle can be locked to prevent wobbling during operation.

[0010] Furthermore, the inner frame is also movably connected to a roller shutter, which is located on the side away from the hinge assembly; In the first position, the roller shutter is located below the fan, and the roller shutter can selectively block or open the ventilation channel; In the second position, the roller blind is positioned above the fan, and can selectively block or open the ventilation channel. Therefore, the roller blind can provide sun shading regardless of the fan's position.

[0011] Furthermore, in order to prevent the fan assembly from interfering with the roller shutter, the hinge assembly is located outside the ventilation channel, and the swing arm has an L-shaped structure. In the first position, the swing arm extends from the hinge assembly into the ventilation channel, and in the second position, the swing arm is disengaged from the ventilation channel.

[0012] Furthermore, in order to fix the position of the fan in the first position, magnetic blocks are provided on the inner side of the inner frame and the outer periphery of the fan. In the first position, the fan is attracted to the inner frame by the magnetic blocks.

[0013] Furthermore, in order to achieve the lifting and lowering of the roof, the inner frame is located inside the outer frame, the outer frame is installed on the top of the vehicle roof, the outer frame is provided with a lifting component, the lifting component is located on the side of the inner frame, and the lifting component is connected to the roof.

[0014] Furthermore, an outer grille is connected to the front end of the top cover, and a guide rail is symmetrically provided on the end face of the outer frame facing the outer grille. A limiting block is movably provided on the outer grille, with one end of the limiting block slidably connected to the guide rail and the other end connected to the outer grille through an elastic element. Thus, the guide rail and the limiting block are used to position and guide the outer grille, preventing the outer grille and the top cover from becoming loose or shaking.

[0015] Furthermore, in order to achieve interior lighting, a light strip is embedded in the portion of the inner frame located inside the vehicle, and the light strip is located between the roof and the inner frame.

[0016] Furthermore, to avoid drilling holes in the roof when installing the inner frame, the inner frame includes an upper frame and a lower frame. The upper frame is located at the upper end of the roof, and the lower frame is located at the bottom of the headlight. The upper frame and the lower frame have corresponding connecting seats, and the connecting seats are fastened together by bolts.

[0017] Furthermore, to prevent the internal wiring from becoming tangled due to the inevitable rotation of the fan, the fan housing has a stop portion in the circumferential direction, and the bearing has a stop block. The stop portion contacts the stop block to limit the rotation angle of the fan.

[0018] The beneficial effects of this invention are: The roof-mounted ventilation device for RVs of the present invention features a movable fan that allows the fan's position to be adjusted relative to the roof, enabling the fan to switch between a first position and a second position. In the first position, the fan functions as a conventional ventilation fan, improving ventilation efficiency. In the second position, the fan is disconnected from the ventilation channel, allowing natural air convection ventilation to be achieved using the ventilation channel. Simultaneously, the fan can still be used as a conventional fan in the second position, giving the roof-mounted ventilation device multiple functions to meet different application scenarios.

[0019] The roof-mounted ventilation device for RVs of the present invention has a self-locking function in both the hinge component and the rotating component, which ensures that the fan in the second position is stable during vehicle operation and effectively prevents the fan from shaking.

[0020] The roof-mounted ventilation device for RVs of the present invention uses a magnetic block to attract the fan at a first position, preventing the fan from detaching from the first position due to bumps during vehicle movement, thus ensuring driving safety. Users only need to exert a little force to pull down the fan, making it convenient for users to use. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a three-dimensional structural schematic diagram of the roof-mounted ventilation device for RVs according to the present invention.

[0023] Figure 2 yes Figure 1 A partial sectional view.

[0024] Figure 3 yes Figure 1 A partial structural diagram.

[0025] Figure 4 This is a cross-sectional view of the fan assembly.

[0026] Figure 5 yes Figure 1 A bottom view.

[0027] Figure 6 This is a schematic diagram of another usage state of the roof-mounted ventilation system for RVs.

[0028] Figure 7 This is a schematic diagram of another usage state of the roof-mounted ventilation system for RVs.

[0029] Figure 8 This is a structural diagram of the lifting assembly.

[0030] Figure 9 This is a partial structural diagram of the outer frame.

[0031] Figure 10This is a partial structural schematic diagram of the roof-mounted ventilation device for RVs in Embodiment 2.

[0032] Figure 11 yes Figure 10 A partial structural diagram.

[0033] Figure 12 This is a schematic diagram of the roof-mounted ventilation device for RVs in Embodiment 2.

[0034] Figure 13 yes Figure 12 A partial sectional view.

[0035] Figure 14 This is a schematic diagram of the switch ratchet pawl.

[0036] Figure 15 This is a cross-sectional view of a roof-mounted ventilation system for RVs.

[0037] Figure 16 This is a partial structural diagram of the fan and bearing.

[0038] In the picture: 1. Inner frame; 11. Ventilation channel; 12. Magnetic block; 2. Outer frame; 21. Guide rail; 22. Upper frame; 23. Lower frame; 24. Connecting seat 3. Fan assembly; 31. Swing arm; 311. Protrusion; 312. Groove; 313. Opening; 32. Fan; 33. Bearing; 331. Limiting groove; 332. Housing; 34. Stop; 35. Stop block; 4. Car roof; 5. Hinge assembly; 501. Hinge seat; 502. Damping hinge; 503. Limit seat; 504. Spring positioning ball; 505. Limit hole; 506. Hinge; 507. Torsion spring; 508. Limit plate; 509. Switch toggle; 510. Switch pawl; 511. Racket tooth; 512. Pawl; 513. Elastic stop bar; 6. Roller blind; 7. Lifting assembly; 71. Motor; 711. First threaded section; 712. Second threaded section; 72. First nut; 73. Second nut; 74. First lifting rod; 75. Second lifting rod; 8. Top cover; 9. Outer grille; 91. Limiting block. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0040] Example 1: like Figure 1 As shown, a roof-mounted ventilation device for a motorhome includes: an inner frame 1, an outer frame 2, and a fan assembly 3. The inner frame 1 is connected to an opening in the roof 4 and has a ventilation channel 11. The fan assembly 3 is movably connected to the inner frame 1 and is located inside the motorhome. The outer frame 2 is mounted above the roof 4. A retractable roof cover 8 is connected to the outer frame 2. When the roof cover 8 is open, the interior of the motorhome can communicate with the outside through the ventilation channel 11. When the roof cover 8 is closed, the communication between the ventilation channel 11 and the outside is cut off.

[0041] like Figure 2 and Figure 3 As shown, specifically, the fan assembly 3 includes a rotating mechanism and a fan 32. The rotating mechanism includes a swing arm 31 and a hinge assembly. The swing arm 31 is movably connected to the inner frame 1 via the hinge assembly 5, and the swing arm 31 can rotate relative to the inner frame 1. The fan 32 is rotatably connected to the swing arm 31. The fan 32 has a first position and a second position. In the first position, the fan 32 is located within the ventilation channel 11. In the second position, the fan 32 is suspended inside the vehicle and away from the ventilation channel 11, and in the second position, the fan 32 rotates to adjust the airflow direction. The swing arm 31 rotates to switch the fan 32 between the first and second positions. The fan can rotate clockwise or counterclockwise to adjust the ventilation mode.

[0042] like Figure 1 As shown, the fan 32 is in the first position. At this time, the fan 32 is located in the ventilation channel 11. When the top cover 8 is opened, the fan 32 can start to achieve ventilation between the inside and outside of the vehicle.

[0043] like Figure 6 and Figure 7 As shown, rotating fan 32 moves it from the first position to the second position. At this point, fan 32 is detached from the ventilation duct 11 and suspended inside the vehicle. In the second position, fan 32 no longer functions as a ventilation fan; instead, it blows air into the vehicle, cooling the driver or passengers and accelerating airflow circulation. Because fan 32 rotates circumferentially, the coverage area of ​​its airflow is increased.

[0044] Of course, such as Figure 16 As shown, the fan 32 has a stop 34 on the circumference of the housing 332 and a stop block 35 on the bearing 33. After the fan 32 rotates a certain angle, the stop 34 contacts the stop block 35, which can limit the rotation angle of the fan 32 and prevent the internal wiring from getting tangled.

[0045] With fan 32 in the second position, after the top cover 8 is opened, external airflow can still enter the vehicle through the ventilation channel 11, achieving natural ventilation between the inside and outside of the vehicle. Simultaneously, since fan 32 is detached from the ventilation channel 11, and there are no obstructions within the ventilation channel 11, external airflow entering the vehicle can quickly diffuse within the vehicle under the action of fan 32, further improving ventilation efficiency. In the second position, fan 32 blows air into the vehicle without affecting the natural ventilation between the ventilation channel 11 and the outside.

[0046] like Figure 3 As shown, specifically, the hinge assembly 5 includes: a hinge base 501, a damping hinge 502, a limiting seat 503, and a spring positioning ball 504. The hinge base 501 is connected to the inner frame 1 and is tightened to the bottom surface of the inner frame 1 by screws. The damping hinge 502 is connected between the hinge base 501 and the swing arm 31. The limiting seat 503 is connected to the hinge base 501 and has multiple limiting holes 505 facing the fan 32. The spring positioning ball 504 is installed on the swing arm 31 and is embedded in the limiting holes 505 to fix the hovering position of the fan 32. Under the action of the damping hinge 502, the swing arm 31 can rotate around the hinge base 501. In this embodiment, the rotation angle of the swing arm 31 is 0-90°, that is, the rotation angle of the fan 32 is also 0-90°. Of course, the rotation angle of the swing arm can also be larger. Since the fan 32 moves relative to the hinge seat 501 in this embodiment, to prevent the fan 32 from shaking due to road bumps during vehicle operation, a spring-loaded positioning ball 504 and a limiting hole 505 are used to provide a certain locking force to the fan 32. When the position of the fan 32 needs to be adjusted, the fan 32 can be rotated directly. During the rotation, the spring-loaded positioning ball 504 automatically retracts and disengages from the limiting hole 505. After the fan 32 rotates a certain angle, the spring-loaded positioning ball 504 re-enters the corresponding limiting hole 505, achieving the suspension of the fan 32 between the first and second positions.

[0047] Preferably, the limiting holes 505 are arranged at intervals from the horizontal to the vertical along the surface of the limiting seat 503, and the limiting holes 505 are also spaced apart to achieve accurate limiting at multiple angles between the first position and the second position, allowing the fan 32 to hover at multiple positions between 0° and 90°. Of course, in this embodiment, there are a total of 4 limiting holes 505, and the fan 32 can achieve position adjustment of 0°, 30°, 60° and 90°. The spring positioning ball 504 is a standard part, and its structure will not be described in detail here. The locking force provided by the spring positioning ball 504 is suitable for normal road conditions, and the fan 32 will not wobble in the first and second positions when the RV is in normal driving conditions.

[0048] like Figure 4As shown, specifically, a bearing 33 is fixedly connected to the end of the swing arm 31 away from the hinge assembly 5. The bearing 33 has evenly spaced limiting grooves 331 along its circumference. The limiting grooves 331 are opened laterally and are located on the side of the bearing closest to the swing arm 33. The housing 332 of the fan 32 is rotatably connected to the bearing 33. A spring positioning ball 504 is provided on the inner side of the housing 332. When the housing 332 rotates around the bearing 33, the spring positioning ball 504 engages with the limiting groove 331 to fix the circumferential rotation position of the fan 32.

[0049] Preferably, the inner ring of the bearing 33 is fixedly connected to the rocker arm 31, and the outer ring of the bearing 33 is fixedly connected to the housing 332. A limiting groove 331 is formed in the circumferential direction of the inner ring. The limiting grooves 331 are evenly spaced in the circumferential direction of the inner ring. The limiting grooves 331 are located on the side of the inner ring closest to the rocker arm 33. The bearing 33 is arranged in a horizontal direction.

[0050] When fan 32 is in the second position, to increase the airflow range of fan 32, the housing 332 of fan 32 is connected to bearing 33. Fan 32 can rotate circumferentially around bearing 33, increasing the airflow area covered by fan 32 and accelerating airflow inside the vehicle. Similarly, multiple limiting grooves 331 are formed circumferentially on bearing 33. When fan 32 rotates circumferentially, spring-loaded positioning balls 504 are also embedded in the limiting grooves 331 to lock the circumferential position of fan 32 and prevent fan 32 from wobbling. It should be noted that the fan's rotation axis is perpendicular to the swing arm, so the fan's airflow direction is determined by both the angle of the swing arm rotation and the angle of the fan rotation, resulting in a wider airflow coverage.

[0051] In this embodiment, the rotation of fan 32 between the first and second positions, as well as its own rotation, are both achieved manually. Of course, automatic rotation of fan 32 can also be achieved by adding a motor. Fan 32 has a conventional structure and will not be described in detail here.

[0052] Preferably, the hinge assembly 5 is located outside the ventilation channel 11, and the swing arm 31 has an L-shaped structure. In the first position, the swing arm 31 extends from the hinge assembly 5 into the ventilation channel 11; in the second position, the swing arm 31 is disengaged from the ventilation channel 11. The lateral section of the swing arm 31 extends from the hinge assembly 5 into the ventilation channel 11, while the vertical section of the swing arm 31 is located on the side of the ventilation channel 11 and extends upward. The fan 32 is positioned perpendicular to the vertical section of the swing arm 31. The bearing 33 is also connected to the vertical section of the swing arm 31. The fan 32 rotates about a direction perpendicular to the vertical section of the swing arm 31.

[0053] Specifically, the inner frame 1 is also movably connected to a roller blind 6, which is located on the side away from the hinge assembly 5. The roller blind 6 can be pulled laterally to either block or open the ventilation channel 11. The roller blind 6 is a conventional blackout curtain, and its structure will not be described in detail.

[0054] Specifically, in the first position, since the fan 32 is inside the ventilation channel 11, the roller shutter 6 is located below the fan 32. The roller shutter 6 can selectively cover or open the ventilation channel 11, which is the normal state.

[0055] Specifically, in the second position, since the fan 32 has moved away from the ventilation channel 11, when both the fan 32 and the hinge assembly 5 are moved below the ventilation channel 11, there is no obstruction between the ventilation channel 11 and the roller shutter 6. At this time, the roller shutter 6 is located above the fan 32, and the roller shutter 6 can selectively cover or open the ventilation channel 11. When the roller shutter 6 covers the ventilation channel 11, it does not affect the blowing function of the fan 32.

[0056] like Figure 5 As shown, preferably, magnetic blocks 12 are provided on the inner side of the inner frame 1 and the outer periphery of the fan 32. In the first position, the fan 32 is attracted to the inner frame 1 by the magnetic blocks 12. The magnetic blocks 12 can further attract the fan 32 to the inner frame 1, ensuring that the fan 32 will not fall off due to bumps during vehicle operation, thus improving driving safety.

[0057] like Figure 8 As shown, specifically, a lifting assembly 7 is provided inside the outer frame 2. The lifting assembly 7 is located on the side of the inner frame 1 and is connected to the top cover 8. The lifting assembly 7 includes a motor 71. The output shaft of the motor 71 has a first threaded section 711 and a second threaded section 712. The helical directions of the first threaded section 711 and the second threaded section 712 are opposite. A first nut 72 is threaded onto the first threaded section 711, and a second nut 73 is threaded onto the second threaded section 712. A first lifting rod 74 is connected to the first nut 72, and a second lifting rod 75 is connected to the second nut 73. The first lifting rod 74 and the second lifting rod 75 are connected to the top cover 8. Thus, the top cover 8 can achieve stable lifting and lowering under the drive of the lifting assembly 7. After the motor 71 starts, since the helical directions of the first threaded section 711 and the second threaded section 712 are opposite, the movement directions of the first nut 72 and the second nut 73 are also opposite, causing the first lifting rod 74 and the second lifting rod 75 to rise or fall simultaneously, thereby realizing the lifting and lowering of the top cover 8.

[0058] like Figure 9As shown, preferably, the front end of the top cover 8 is connected to an outer grille 9. The outer frame 2 has a guide rail 21 symmetrically positioned on its end facing the outer grille 9. A limiting block 91 is movably mounted on the outer grille 9. One end of the limiting block 91 is slidably connected to the guide rail 21, and the other end is connected to the outer grille 9 via an elastic element. The outer grille 9 is detachably connected to the top cover 8, and it rises and falls synchronously with the top cover 8. When the outer grille 9 rises, the limiting block 91 moves upward along the guide rail 21. Simultaneously, the limiting block 91, under the pressure of the guide rail 21, moves horizontally towards the outer grille 9. Under the action of the elastic element, the limiting block 91 is always pressed firmly against the guide rail 21, ensuring that the outer grille 9 and the top cover 8 rise and fall along the guide rail 21, guaranteeing accurate lifting and lowering positions.

[0059] Preferably, the portion of the inner frame 1 located inside the vehicle is fitted with a light strip, which is positioned between the roof 4 and the inner frame 1. The light strip is located inside the inner frame 1, preventing direct exposure and improving the lighting effect.

[0060] Example 2: The difference from Example 1 is that, as Figure 10 and Figure 11 As shown, the hinge assembly 5 includes: a hinge base 501, a rotating shaft, a hinge 506, and a spring positioning ball 504. The hinge base 501 is connected to the inner frame 1, and a plurality of limiting holes 505 are provided on the side of the hinge base 501. The two ends of the rotating shaft are rotatably connected to the hinge base 501, and a torsion spring 507 is sleeved on the rotating shaft. One end of the torsion spring 507 abuts against the hinge base 501, and the other end abuts against the swing arm 31. The hinge 506 is sleeved on the rotating shaft and connected to the spring, and the other end of the hinge 506 is connected to the swing arm 31. The spring positioning ball 504 is connected to the side of the hinge 506, and the spring positioning ball 504 is positioned towards the limiting holes 505. The spring positioning ball 504 is embedded in the limiting holes 505 to fix the hovering position of the fan 32.

[0061] The hinge component 5 in this embodiment has the same function as in embodiment one, the difference being the different specific structures.

[0062] In this embodiment, limiting holes 505 are provided on the left and right end faces of the hinge base 501, and the limiting holes 505 are also evenly arranged at intervals between 0° and 90°. The hinge base 501 has a mounting hole, and the rotating shaft is connected to the hinge 506. One end of the hinge 506 is rotatably connected in the mounting hole, and the spring positioning ball 504 is mounted on the side of the hinge 506, with the spring positioning ball 504 facing the limiting hole 505. When the hinge 506 rotates, the spring positioning ball 504 will move between the limiting holes 505. When the spring positioning ball 504 enters the limiting hole 505, it limits the hinge 506. The other end of the hinge 506 is fixedly connected to the swing arm 31, and the rotation of the swing arm 31 drives the hinge 506 to rotate. Meanwhile, the hinge seat 501 has a limiting plate 508 facing the hinge 506, and the swing arm 31 has a protrusion 311 facing the pivot. The two sides of the protrusion 311 form a groove 312 between the swing arm 31 and the two sides of the protrusion 311. One end of the torsion spring 507 abuts against the bottom of the limiting plate 508, and the other end abuts against the groove 312.

[0063] Example 3: The difference from Example 1 is that, as Figures 12 to 14 As shown, the hinge assembly 5 includes: a hinge base 501, a switch toggle 509, and a switch pawl 510. The swing arm 31 is rotatably connected to the hinge base 501, which is connected to the inner frame 1. The hinge base 501 has multiple ratchet teeth 511 facing the fan 32. The switch toggle 509 is rotatably connected to the swing arm 31. The switch pawl 510 is connected to the front end of the rocker arm 31 and faces the ratchet 511. The switch pawl 510 is located at the front end of the ratchet 511. The switch pawl 510 has an elastic stop bar 513 that abuts against the rocker arm 31. The lower end of the switch knob 509 abuts against the switch pawl 510. Rotating the switch knob 509 pushes the switch pawl 510 to rotate, thereby separating the switch pawl 510 from the ratchet 511. Releasing the switch knob 509 pushes the switch pawl 510 to reset, thereby engaging the switch pawl 510 with the ratchet 511. When it is necessary to rotate the fan 32, the switch knob 509 needs to be pressed. The switch knob 509 will push the switch pawl 510 to rotate. After the switch pawl 510 rotates, it will disengage from the ratchet 511. At this time, the swing arm 31 can rotate freely. After the swing arm 31 rotates to a certain angle, the switch knob 509 is released. Under the elastic force of the elastic stop bar 513, the switch pawl 510 resets and engages with the ratchet 511 again. At this time, the fan 32 is locked again.

[0064] Preferably, the switch knob 509 has a C-shaped structure, and the rocker arm 31 has an opening 313. The upper end of the switch knob 509 extends from the opening 313 and protrudes from the rocker arm 31 for easy operation by the user. The lower end of the switch knob 509 abuts against the bottom surface of the switch pawl 510, thereby pushing the switch pawl 510 to rotate.

[0065] Preferably, the switch pawl 510 has a T-shaped structure, with one end of the switch pawl 510 extending to the inside of the switch knob 509, and the other end of the switch pawl 510 having a pawl 512, which engages with the ratchet 511 to restrict the rotation of the swing arm 31.

[0066] In this embodiment, the swing arm 31 is limited by the switch knob 509, the hinge seat 501 and the switch pawl 510. The fan 32 can only swing when the switch knob 509 is pressed, making the locking of the fan 32 more reliable.

[0067] Example 4, Based on Example 3, such as Figure 15 As shown, the inner frame 2 includes an upper frame 22 and a lower frame 23. The upper frame 22 is located at the upper end of the roof 4, and the lower frame 23 is located at the bottom end of the roof 4. Corresponding connecting seats 24 are provided between the upper frame 22 and the lower frame 23, and the connecting seats 24 are fastened together by bolts. In this embodiment, the upper frame 22 and the lower frame 23 are directly connected, avoiding the need to drill holes in the roof for installing the inner frame, thus simplifying the assembly process.

[0068] The RV roof ventilation device of the present invention is equipped with a fan that can move relative to the roof. In the first position, the fan can accelerate the exchange of air between the vehicle and the outside. In the second position, the fan can be turned off to achieve natural convection ventilation between the vehicle and the outside. At the same time, in the second position, the fan can also blow air into the vehicle, which can function as a conventional fan.

[0069] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A roof-mounted ventilation device for RVs, characterized in that: include: The inner frame (1) is connected to the opening in the roof (4) and has a ventilation channel (11). The top cover (8) is lifted and connected to the roof (4). The top cover (4) is raised to connect the ventilation channel (11) with the external environment, and the top cover (4) is lowered to isolate the ventilation channel (11) from the external environment. Fan assembly (3), the fan assembly (3) comprising: A rotating mechanism is rotatably connected to the inner frame (1); A fan (32) is connected to a rotating mechanism and can rotate on the rotating mechanism. The fan (32) can rotate forward or backward to adjust the ventilation mode. The fan (32) has a first position and a second position. In the first position, the fan (32) is located in the ventilation channel (11). In the second position, the fan (32) is suspended inside the vehicle and away from the ventilation channel (11). In the second position, the fan (32) rotates on a rotating mechanism to adjust the airflow direction of the fan (32). The rotating mechanism rotates to drive the fan (32) to switch between the first position and the second position.

2. The roof-mounted ventilation device for RVs according to claim 1, characterized in that: The rotating mechanism includes: Hinged assembly (5), which is connected to the inner frame (1) A swing arm (31) is connected to a hinge assembly (5) and the swing arm (31) rotates relative to the inner frame via the hinge assembly (5); The fan is connected to the swing arm (31), and the fan (32) can rotate on the swing arm.

3. The roof-mounted ventilation device for RVs according to claim 2, characterized in that: The hinge assembly (5) includes: A hinge seat (501) is connected to the inner frame (1); A damping hinge (502) is connected between the hinge base (501) and the swing arm (31); A limiting seat (503) is connected to a hinge seat (501) and has a plurality of limiting holes (505) facing the fan (32). A spring positioning ball (504) is mounted on the swing arm (31) and is embedded in a limiting hole (505) to fix the hovering position of the fan (32).

4. The roof-mounted ventilation device for RVs according to any one of claims 1-3, characterized in that: The swing arm (31) is fixedly connected to a bearing (33) at one end away from the hinge assembly (5). The bearing (33) is provided with a circumferentially spaced limiting groove (331). The housing (332) of the fan (32) is rotatably connected to the bearing (33). The inner side of the housing (332) is provided with a spring positioning ball (504). When the housing (332) rotates around the bearing (33), the spring positioning ball (504) is embedded in the limiting groove (331) to fix the circumferential rotation position of the fan (32).

5. The roof-mounted ventilation device for RVs according to claim 4, characterized in that: The fan (32) has a stop (34) in the circumferential direction of the housing (332) and a stop (35) on the bearing (33). The stop (35) contacts the stop (34) to limit the rotation angle of the fan (32).

6. The roof-mounted ventilation device for RVs according to claim 1, characterized in that: The inner frame (1) is also movably connected to a roller shutter (6), which is located on the side away from the hinge assembly (5); In the first position, the roller shutter (6) is located below the fan (32), and the roller shutter (6) can selectively cover or open the ventilation channel (11). In the second position, the roller shutter (6) is located above the fan (32), and the roller shutter (6) can selectively block or open the ventilation channel (11).

7. The roof-mounted ventilation device for RVs according to claim 1, characterized in that: The inner side of the inner frame (1) and the outer periphery of the fan (32) are provided with magnetic blocks (12). In the first position, the fan (32) is attracted to the inner frame (1) by the magnetic blocks (12).

8. The roof-mounted ventilation device for RVs according to claim 1, characterized in that: The inner frame (1) is located inside the outer frame (2), the outer frame (2) is installed on the top of the roof (4), the outer frame (2) is provided with a lifting assembly (7), the lifting assembly (7) is located on the side of the inner frame (1), and the lifting assembly (7) is connected to the top cover (8).

9. The roof-mounted ventilation device for RVs according to claim 8, characterized in that: The top cover (8) is connected to an outer grille (9) at its front end. The outer frame (2) is symmetrically provided with a guide rail (21) facing the outer grille (9). A limit block (91) is movably provided on the outer grille (9). One end of the limit block (91) is slidably connected to the guide rail (21), and the other end is connected to the outer grille (9) through an elastic element.

10. The roof-mounted ventilation device for RVs according to claim 1, characterized in that: The inner frame (1) is fitted with a light strip in the part inside the vehicle, and the light strip is located between the roof (4) and the inner frame (1).

11. The roof-mounted ventilation device for RVs according to claim 1, characterized in that: The inner frame (2) includes an upper frame (22) and a lower frame (23). The upper frame (22) is located at the upper end of the roof (4), and the lower frame (23) is located at the bottom end of the roof (4). There are corresponding connecting seats (24) between the upper frame (22) and the lower frame (23), and the connecting seats (24) are fastened together by bolts.

Images