A solar attic fan

Abstract

The application relates to a solar attic fan, comprising: a shell assembly, a fan device and a solar power supply device for supplying power to the fan device, the shell assembly is assembled on an attic roof and is internally hollow, the fan device comprises a driving device and a fan blade assembly, the shell assembly is internally provided with a liftable mounting rack assembly, the driving device is connected with the mounting rack assembly through a torque transmission piece, the solar power supply device is assembled on the other end of the driving device and is electrically connected with the driving device through a power supply module, an active gap is arranged between the fan device and the solar power supply device, the mounting rack assembly is configured to sense the temperature in the shell assembly, when the temperature rises, the mounting rack assembly drives the driving device to rise and move away from the fan blade assembly, so as to reduce the wind resistance, increase the active gap and the airflow passing through the solar power supply device and the driving device, and heat dissipation is assisted.

Description

Technical Field

[0001] This application relates to the field of building fan technology, and in particular to a solar-powered loft fan. Background Technology

[0002] Existing attic fans are generally installed on the roof, gable, or are ventilation devices specifically designed to exhaust hot air from the attic. Their core function is to reduce the temperature in the attic, decrease the air conditioning load, and extend the life of the roofing materials. Since attic buildings have a large floor area, fans usually need to be used in conjunction with the attic ventilation system. When using solar energy to provide auxiliary power to attic fans, the solar panels are generally exposed on the outside of the roof to ensure their efficiency in radiating sunlight. To achieve a miniaturized design, the fan and solar panel are usually integrated together.

[0003] Existing technology involves a solar-powered electric fan, including a solar cell module and a fan assembly mounted on one end of a motor. The fan assembly includes a main shaft connected to the motor, a main fan blade connected to the main shaft, and an auxiliary fan blade. The auxiliary fan blade is mounted in the axial position of the main shaft, and the main fan blade is mounted in the radial position of the main shaft, thereby blowing air around the fan, diagonally downward, and directly downward.

[0004] Although the above technology utilizes solar energy, when applied to attic buildings, in order to ensure the photovoltaic efficiency of solar panels, they are generally exposed on the outside of the roof, resulting in a high surface temperature. Excessive temperature leads to a lower photovoltaic conversion efficiency of the solar panels, resulting in less converted electricity and poor energy saving. Summary of the Invention

[0005] This application provides a solar-powered attic fan that solves the problem that existing solar fans, due to excessively high internal temperatures, have low photovoltaic power generation efficiency and are still not ideal in terms of energy saving.

[0006] The technical solution of this application is as follows: A solar-powered attic fan, comprising:

[0007] A housing assembly, which is fitted onto the attic roof and is hollow inside;

[0008] A fan assembly, comprising a drive unit and a fan blade assembly, wherein a liftable mounting bracket assembly is provided inside the housing assembly, and the drive unit is connected to the mounting bracket assembly via a torque transmission component;

[0009] A solar power supply device for supplying power to the fan unit, the solar power supply device being mounted on the other end of the drive unit and electrically connected to the drive unit via a power supply module;

[0010] A movable gap is provided between the fan device and the solar power supply device. The mounting bracket assembly is configured to sense the temperature inside the housing assembly. When the temperature rises, the mounting bracket assembly drives the drive device to rise and move away from the fan blade assembly to reduce wind resistance. At the same time, the movable gap is increased to increase the airflow through the solar power supply device and the drive device to assist in heat dissipation.

[0011] By adopting the above solution, if the temperature inside the outer casing becomes too high due to malfunction of the fan device, the mounting bracket assembly can sense the abnormal temperature and drive the drive device to rise, simultaneously raising the solar power supply device. This moves the drive device away from the fan blade assembly, reducing the obstruction of the airflow above the fan blade assembly by the motor. Simultaneously, the rise of the solar power supply device increases the clearance, thereby increasing the flow rate of external airflow passing through the solar power supply device and drive device. The airflow can carry away some of the heat from the solar power supply device and drive device, improving their heat dissipation capacity. Furthermore, the increased air intake area further reduces the resistance encountered by the airflow when the fan blade assembly enters the device at the same rotational speed. This improves the power generation efficiency of the solar power supply device while reducing the power consumption of the fan device.

[0012] In one embodiment of this application, the mounting bracket assembly includes:

[0013] Multiple fixing brackets are provided, the outer shell assembly is a columnar member, the multiple fixing brackets are circumferentially spaced inside the outer shell assembly, and multiple circumferentially spaced gaps are formed between the multiple fixing brackets and the outer shell assembly;

[0014] The temperature sensing component has a rectangular groove extending vertically on the side of the fixing frame away from the outer shell assembly, and the temperature sensing component is assembled in the rectangular groove.

[0015] A lifting block is slidably mounted in the rectangular slide groove on one side along the vertical direction. The temperature sensing component is configured to sense the temperature rise inside the housing assembly and drive the lifting block to rise. The other side of the lifting block is connected to the driving device.

[0016] By adopting the above scheme, using a fixed frame and a temperature sensing component, when the temperature inside the outer casing rises to the threshold that triggers the temperature sensing component to operate, the temperature sensing component drives the lifting block to rise, which in turn causes the lifting block to drive the drive device to rise.

[0017] In one embodiment of this application, the temperature sensing component includes:

[0018] A bimetallic strip, wherein a rectangular groove is formed on the bottom sidewall of the rectangular slide, and the bimetallic strip is assembled in the rectangular groove;

[0019] A movable block is slidably mounted on the inner wall of the bottom end of the rectangular slide groove along the radial direction of the outer shell assembly. The top end of the movable block has a first inclined surface, and the bottom end of the lifting block has a second inclined surface that matches the shape of the first inclined surface. When the temperature inside the outer shell assembly rises, the bimetallic strip is configured to drive the movable block to move towards the central axis of the outer shell assembly, so that the first inclined surface and the second inclined surface abut against each other, thereby driving the lifting block to rise.

[0020] By adopting the above scheme, by using a bimetallic strip, and utilizing the principle of thermal expansion and deformation of bimetal, the bimetallic strip can drive the moving block to move along the radial direction of the outer shell assembly. By utilizing the cooperation between the moving block and the lifting block, the device can sense the internal temperature of the device without consuming additional energy, and drive the entire drive device to rise.

[0021] In one embodiment of this application, the driving device includes:

[0022] The motor outer compartment contains a motor, the drive shaft of which extends out of one end of the motor outer compartment, and the other side of the plurality of lifting blocks is fixedly mounted on the outer wall of the motor outer compartment at circumferential intervals.

[0023] The threaded compartment cover has an annular threaded groove coaxially formed on the other end of the motor outer compartment. The threaded compartment cover is screwed into the threaded groove. The threaded compartment cover is provided with an angle adjustment component and is connected to the solar power supply device through the angle adjustment component.

[0024] By adopting the above scheme, the drive device is set as a detachable motor outer layer and threaded compartment cover, and the motor and solar power supply device are respectively set on the motor outer layer and threaded compartment cover. This allows the device to easily separate the solar power supply device from the motor outer compartment, which is convenient for later maintenance. At the same time, it also allows a gap to be formed between the motor outer compartment and the threaded compartment cover, which is convenient for subsequent adjustment of the angle between the solar power supply device and the motor outer compartment.

[0025] In one embodiment of this application, the fan blade assembly includes:

[0026] The bracket has one end of the outer shell assembly extending into the attic roof, and the outer shell assembly has multiple spaced ventilation holes on the outside of one end, which are arranged in a ring at one end of the outer shell assembly. The bracket is assembled on the inner wall of one end of the outer shell assembly.

[0027] The fan blade is mounted on the bracket with a tapered roller bearing coaxial with the drive shaft of the motor. One side of the fan blade is connected to the inner ring of the tapered roller bearing. The fan blade is located below the ventilation hole. The other side of the fan blade is connected to the motor through a torque transmission component.

[0028] By adopting the above solution, the fan blades are mounted on the bracket and the bracket is assembled on the housing assembly, so that the bracket can support the weight of the fan blades, reducing the axial traction force of the fan blades on the motor drive shaft, thereby reducing the frictional resistance of the motor drive shaft when rotating and reducing the power consumption of the motor.

[0029] In one embodiment of this application, the torque transmission element includes:

[0030] An extension tube is provided on the other side of the fan blade, and the extension tube has an annular strip keyway circumferentially arranged along its inner wall.

[0031] The insertion rod is coaxially fixedly mounted on the drive shaft of the motor, and the insertion rod has a key bar on its outer circumference that matches the shape of the strip keyway.

[0032] By adopting the above scheme, the cutting rod is inserted into the extension tube, and the circumferential engagement between the cutting rod and the extension tube is achieved by using the interlocking between the key bar and the keyway. This ensures that the cutting rod can be relatively displaced in the axial direction relative to the extension tube, while the drive shaft of the motor can transmit torque to the extension tube to drive the fan blades to rotate.

[0033] In one embodiment of this application, the solar power supply device includes a snap-fit ​​cover plate with a bowl-shaped cavity inside. One side of the snap-fit ​​cover plate is connected to the angle adjustment member, and the other side is provided with a solar panel. The solar panel is electrically connected to the driving device.

[0034] By adopting the above solution, the fastening cover is set as a bowl-shaped component. When the bowl-shaped component is pressed down, the edge of the fastening cover is fastened to the edge of the columnar outer shell assembly, thereby ensuring that rainwater will not enter the interior of the outer shell assembly when it rains.

[0035] In one embodiment of this application, the angle adjustment member includes:

[0036] A hollow spherical frame is provided, with a cylindrical cavity inside the threaded compartment cover. The hollow spherical frame is assembled outside the threaded compartment cover and communicates with the cylindrical cavity. A fixed filling medium is provided inside the cylindrical cavity. A piston column is slidably sealed inside the cylindrical cavity. One end of the piston column extends out of the cylindrical cavity and abuts against the outer compartment of the motor.

[0037] A deflecting ball is disposed inside the hollow spherical frame. One end of the deflecting ball, away from the cylindrical cavity, protrudes from the hollow spherical frame, and the other end is fixedly connected to a plurality of resistance plates. One end of the resistance plates extends into the cylindrical cavity.

[0038] An assembly plate, one side of which is fixedly mounted on one end of the deflection ball, and the other side is connected and fixed to the snap-fit ​​cover plate.

[0039] By adopting the above scheme, when it is necessary to adjust the angle of the solar panel according to seasonal changes in sunlight, the threaded cover is first screwed upwards. At this time, one end of the piston rod no longer presses against the outer casing of the motor, and the volume between the piston rod and the cylindrical cavity increases. At this time, the solid filling medium becomes loose because it is no longer subjected to mutual compression forces, and the deflection ball can deflect and rotate inside the hollow spherical frame. At this time, the angle of the solar panel can be adjusted according to the installation position of the device and the angle of sunlight. After the adjustment is completed, the threaded cover is screwed back onto the outer casing of the motor. After the piston rod is squeezed by the outer casing of the motor, it re-compresses the loose solid filling medium into a block, thereby fixing the resistance plate of the deflection ball and thus fixing the deflection ball so that it will not deflect. The device can fix the solar power supply device on the outer casing component and fix its angle at the same time by simply using the threaded screwing action between the threaded cover and the outer casing of the motor.

[0040] In one embodiment of this application, an annular dustproof assembly is further included, the dustproof assembly comprising:

[0041] A first elastic ring is coaxially mounted on the inner wall of the other end of the housing assembly;

[0042] A ring-shaped dustproof net, wherein the outer ring of the ring-shaped dustproof net is coaxially fixedly assembled to the inner wall of the first elastic ring;

[0043] The second elastic ring, the inner ring of the annular dustproof net, is coaxially sleeved on the outer casing of the motor and is connected and fixed to the outer casing of the motor.

[0044] By adopting the above solution and setting up a flexible dustproof component, the dustproof component can be adaptively stretched when the cover is raised, ensuring its own dustproof effect while meeting the deformation requirements of the device.

[0045] The inner wall of the snap-fit ​​cover plate is coaxially provided with an annular groove, and the annular groove is provided with an annular hydrogel.

[0046] By adopting the above solution, when external moisture seeps into the gap between the snap-fit ​​cover and the outer casing assembly, the annular hydrogel expands upon contact with water and fills the gap, thereby reducing the possibility of water entering the device when it rains.

[0047] In summary, this application includes at least one of the following beneficial technical effects:

[0048] 1. By setting up vertically distributed and movable solar power supply devices and fan devices, the device can operate without additional power consumption. The heat generated by the solar power supply devices and fan devices themselves serves as a signal, causing the internal temperature of the outer casing to rise to a preset threshold. The bimetallic strip deforms due to the temperature, which in turn causes the fan device and solar power supply device to rise. This allows more air to flow through the back of the solar power supply device and through the fan device, improving heat dissipation efficiency, increasing the air intake area, and reducing wind resistance. As a result, the entire device improves energy efficiency while maintaining its original working efficiency.

[0049] 2. By setting up a detachable fan blade assembly, the fan blades can be driven to rotate by the motor, while the weight of the fan blades themselves will act on the bracket. This avoids the fan blades exerting an axial traction force on the motor due to their own weight, and thus avoids the additional frictional resistance generated between the motor drive shaft and the motor housing due to the axial force. This allows the motor to meet its own lifting needs, avoid damage to the motor from axial traction force, and improve its energy efficiency.

[0050] 3. By setting up an outer motor compartment and a threaded compartment cover, and by placing the solar power supply device on the threaded compartment cover, the solar power supply device can be fixed in position through the threaded connection between the threaded compartment cover and the outer motor compartment. At the same time, as the threaded compartment cover is continuously screwed in, the piston column can compress the solid filling medium inside the cylindrical cavity. This compressed solid filling medium is used to fix the resistance plate below the deflection ball, so that the deflection ball itself will not deflect. This allows the solar power supply device to be fixed in position and angle. Attached Figure Description

[0051] Figure 1 This is a perspective view of a solar-powered attic fan provided in the first embodiment of this application;

[0052] Figure 2 This is a front sectional view of a solar-powered attic fan cover plate being lowered, according to the first embodiment of this application.

[0053] Figure 3 This is a front sectional view of a solar attic fan cover plate being raised according to the first embodiment of this application;

[0054] Figure 4 This is a front sectional view of a solar-powered loft fan mounting bracket assembly provided in the first embodiment of this application;

[0055] Figure 5 This is a front sectional view of a solar attic fan with a loose solid filling medium, provided in the first embodiment of this application;

[0056] Figure 6 This is a front sectional view of a solar attic fan with a solid filling medium being compressed, provided in the first embodiment of this application;

[0057] Figure 7 This is a top sectional view of a solar-powered attic fan extension tube provided in the first embodiment of this application;

[0058] Figure 8 This is a top view of the outer compartment of a solar-powered loft fan motor provided in the first embodiment of this application;

[0059] Figure 9 This is a perspective view of a solar-powered attic fan dustproof component provided in the first embodiment of this application;

[0060] Figure 10 This is a perspective view of a ring-shaped hydrogel for a solar-powered attic fan provided in the first embodiment of this application.

[0061] Explanation of reference numerals in the attached drawings: 1. Housing assembly; 11. Ventilation hole; 2. Fan assembly; 21. Drive unit; 211. Motor housing; 2110. Motor; 2111. Threaded groove; 212. Threaded housing cover; 2121. Cylindrical cavity; 2122. Fixed filling medium; 22. Fan blade assembly; 221. Bracket; 222. Fan blade; 223. Tapered roller bearing; 23. Angle adjustment component; 231. Hollow spherical frame; 232. Piston column; 233. Deflection ball; 234. Resistance plate; 235. Assembly plate; 24. Torque transmission component; 241. Extension tube ; 2411, Strip keyway; 242, Insertion rod; 2421, Key strip; 3, Mounting bracket assembly; 31, Fixing bracket; 311, Rectangular slide; 3111, Rectangular groove; 32, Temperature sensing component; 321, Bimetallic strip; 322, Moving block; 3221, First inclined surface; 33, Lifting block; 331, Second inclined surface; 4, Movement gap; 5, Solar power supply device; 52, Fastening cover plate; 521, Annular hydrogel; 53, Solar panel; 6, Dustproof component; 61, First elastic ring; 62, Annular dustproof net; 63, Second elastic ring. Detailed Implementation

[0062] The following is in conjunction with the appendix Figures 1-10 This application provides a further detailed description of a solar-powered attic fan.

[0063] The solar-powered attic fan provided in this application embodiment includes: a housing assembly 1, a fan device 2, and a solar power supply device 5.

[0064] Please see Figure 1 , Figure 2 and Figure 3 The outer casing assembly 1 is mounted on the roof of the attic and is hollow inside. The fan device 2 includes a drive device 21 and a fan blade assembly 22. The outer casing assembly 1 has a liftable mounting frame assembly 3 inside. The drive device 21 and the mounting frame assembly 3 are connected through a torque transmission component 24. The solar power supply device 5 is used to supply power to the fan device 2. The solar power supply device 5 is mounted on the other end of the drive device 21 and is electrically connected to the drive device 21 through a power supply module. There is an movable gap 4 between the fan device 2 and the solar power supply device 5. The mounting frame assembly 3 is configured to sense the temperature inside the outer casing assembly 1. When the temperature rises, the mounting frame assembly 3 drives the drive device 21 to rise and move away from the fan blade assembly 22 to reduce wind resistance. At the same time, it increases the movable gap 4 to increase the airflow through the solar power supply device 5 and the drive device 21 to assist in heat dissipation. By sensing the temperature rise and raising the mounting frame of the fan device 2 and the solar power supply device 5, the device can increase the air intake area to reduce wind resistance and improve the heat dissipation capacity of the solar power supply device 5 and the fan device 2.

[0065] In this embodiment, a control unit (not shown) is also included. The control unit may include a microcontroller (MCU), a relay, and a power management chip. The electrical connection method between the microcontroller (MCU), the relay, and the power management chip is a conventional technique for those skilled in the art, and therefore will not be described again.

[0066] In one embodiment of this application, the height of the movable gap 4 between the solar power supply device 5 and the drive device 21 is increased from 5 mm to 30 mm compared with before the lifting, which greatly enhances air convection. According to simulation calculations, the temperature on the back of the solar panel can be reduced by about 8-10°C under high-intensity sunlight, thereby improving the photovoltaic conversion efficiency by about 3-5%.

[0067] Please see Figure 4The mounting bracket assembly 3 includes: multiple fixing brackets 31, a temperature sensing component 32, and a lifting block 33. The outer shell assembly 1 is a columnar member. The multiple fixing brackets 31 are spaced apart circumferentially inside the outer shell assembly 1, forming multiple circumferentially spaced gaps between the multiple fixing brackets 31 and the outer shell assembly 1. A rectangular sliding groove 311 extending vertically is opened on the side of the fixing bracket 31 away from the outer shell assembly 1. The temperature sensing component 32 is assembled in the rectangular sliding groove 311. One side of the lifting block 33 is slidably assembled in the rectangular sliding groove 311 in the vertical direction. The temperature sensing component 32 is configured to sense the temperature rise inside the outer shell assembly 1 and drive the lifting block 33 to rise. The other side of the lifting block 33 is connected to the driving device 21. By setting the temperature sensing component 32 and using the temperature sensing component 32 to sense the temperature and drive the lifting block 33 to rise, it is convenient to raise the solar power supply device 5 and the fan device 2 when the internal temperature of the device is too high, thereby improving the heat dissipation capacity.

[0068] Please continue reading Figure 4 The temperature sensing component 32 includes a bimetallic strip 321 and a movable block 322. A rectangular groove 3111 is formed on the bottom sidewall of the rectangular slide groove 3111. The bimetallic strip 321 is fitted into the rectangular groove 3111. The movable block 322 is slidably fitted onto the bottom inner wall of the rectangular slide groove 311 along the radial direction of the outer casing component 1. A first inclined surface 3221 is formed at the top of the movable block 322. A second inclined surface 331, matching the shape of the first inclined surface 3221, is formed at the bottom of the lifting block 33. The temperature inside the outer casing component 1 increases. When the bimetallic strip 321 is configured to drive the moving block 322 to move towards the central axis of the outer casing assembly 1, the first inclined surface 3221 and the second inclined surface 331 abut against each other, thereby driving the lifting block 33 to rise. By setting the bimetallic strip 321, the device can sense the internal working temperature more energy-efficiently without additional power loss, by utilizing the characteristic of the bimetallic strip 321 to expand and deform when heated, and at the same time drive the lifting block 33 to rise, thereby improving the energy efficiency of the device and meeting the device's heat dissipation requirements.

[0069] In this embodiment, the bimetallic strip 321 can be a high-temperature FPA series bimetallic strip that produces a predetermined deformation when the temperature reaches 65°C. The two metal materials of the bimetallic strip 321 are customized according to the actual heating conditions of the device. The above temperature is the temperature threshold for triggering the drive device 21 to rise.

[0070] Please see Figure 5 and Figure 6The drive device 21 includes a motor outer chamber 211 and a threaded cover 212. A motor 2110 is installed inside the motor outer chamber 211. The drive shaft of the motor 2110 extends out of one end of the motor outer chamber 211. Multiple lifting blocks 33 are fixedly mounted on the outer wall of the motor outer chamber 211 at circumferential intervals on the other side. An annular threaded groove 2111 is coaxially opened on the other end of the motor outer chamber 211. The threaded cover 212 is threaded into the threaded groove 2111. An angle adjustment component 23 is provided on the threaded cover 212 and is connected to the solar power supply device 5 through the angle adjustment component 23. By mounting the solar power supply device 5 on the threaded cover 212, the device can be easily disassembled and assembled by rotating the threaded cover 212, thereby improving the convenience of later maintenance of the solar power supply device 5.

[0071] Please see Figure 3 The fan blade assembly 22 includes a bracket 221 and a fan blade 222. One end of the outer casing assembly 1 extends into the attic roof. Multiple spaced ventilation holes 11 are provided on the outer side of one end of the outer casing assembly 1, arranged in a ring at one end. The bracket 221 is mounted on the inner wall of one end of the outer casing assembly 1. A tapered roller bearing 223, coaxial with the drive shaft of the motor 2110, is mounted on the bracket 221. One side of the fan blade 222 is aligned with the tapered roller bearing 223. The inner ring of 23 is connected, and the fan blade 222 is located below the ventilation hole 11. The other side of the fan blade 222 is connected to the motor 2110 through the torque transmission component 24. By setting the split fan blade 222 and setting the fan blade 222 on the bracket 221, the fan blade 222's own weight acts on the tapered roller bearing 223 on the bracket 221 when it rotates, thereby avoiding axial traction on the drive shaft of the motor 2110 and reducing the extra power consumption of the motor 2110 due to axial traction.

[0072] In this embodiment, the bracket 221 may be composed of at least two rod-shaped components. One end of the bracket 221 is connected and fixed to the outer ring of the tapered roller bearing 223, and the other end is connected and fixed to the inner wall of one end of the housing assembly 1.

[0073] Please see Figure 7 and Figure 8The torque transmission component 24 includes an extension tube 241 and a insertion rod 242. The extension tube 241 is disposed on the other side of the fan blade 222. The extension tube 241 has an annular strip keyway 2411 circumferentially disposed along its inner wall. The insertion rod 242 is coaxially fixedly mounted on the drive shaft of the motor 2110. The insertion rod 242 has a key bar 2421 circumferentially disposed on its outer side that matches the shape of the strip keyway 2411. By sliding the extension tube 241 and the insertion rod 242 relative to each other in the axial direction and using the key bar 2421 and the keyway to engage circumferentially, the distance between the fan blade 222 and the drive device 21 can be increased when the motor 2110 is lifted, thereby reducing the wind resistance generated by the motor 2110 on the fan blade 222 and avoiding the axial traction force generated by the fan blade 222 on the drive shaft of the motor 2110.

[0074] Please see Figure 2 and Figure 3 The solar power supply device 5 includes a snap-fit ​​cover plate 52, which has a bowl-shaped cavity inside. One side of the snap-fit ​​cover plate 52 is connected to the angle adjustment member 23, and the other side is provided with a solar panel 53. The solar panel 53 is electrically connected to the drive device 21. By setting the bowl-shaped snap-fit ​​cover plate 52, the snap-fit ​​cover plate 52 can lock the outer shell assembly 1 when it is lowered, so that rainwater from the outside will not enter the device.

[0075] Please continue reading Figure 5 and Figure 6The angle adjusting component 23 includes: a hollow spherical frame 231, a deflection ball 233, and an assembly plate 235. A cylindrical cavity 2121 is formed inside the threaded chamber cover 212. The hollow spherical frame 231 is assembled to the outside of the threaded chamber cover 212 and communicates with the cylindrical cavity 2121. A fixed filling medium 2122 is provided inside the cylindrical cavity 2121. A piston column 232 is slidably sealed inside the cylindrical cavity 2121. One end of the piston column 232 extends out of the cylindrical cavity 2121 and abuts against the motor outer chamber 211. The deflection ball 233 is disposed inside the hollow spherical frame 231, with one end of the deflection ball 233 protruding from the hollow spherical frame away from the cylindrical cavity 2121. 231, with multiple resistance plates 234 fixedly connected to the other end. One end of the resistance plate 234 extends into the interior of the columnar cavity 2121. One side of the assembly plate 235 is fixedly assembled to one end of the deflection ball 233, and the other side is connected and fixed to the snap-fit ​​cover plate 52. By setting a solid filling medium and piston column 232, when the solar power supply device 5 is assembled on the threaded compartment cover 212, the solid filling medium is squeezed and changes from a discrete state to a compressed state, thereby fixing the resistance plate 234 and preventing the deflection ball 233 from deflecting. This allows the device to fix the angle of the solar power supply device 5 while assembling it, reducing the installation and disassembly process and improving the efficiency of assembly and disassembly.

[0076] In this embodiment, the solid filling medium can be quartz sand.

[0077] Please see Figure 9 It also includes an annular dustproof component 6, which includes: a first elastic ring 61, an annular dustproof net 62, and a second elastic ring 63. The first elastic ring 61 is coaxially mounted on the inner wall of the other end of the outer shell component 1. The outer ring of the annular dustproof net 62 is coaxially fixedly mounted on the inner wall of the first elastic ring 61. The inner ring of the annular dustproof net 62 is coaxially sleeved on the outer casing 211 of the motor and is connected and fixed to the outer casing 211 of the motor. The dustproof component 6 is provided to be elastically stretchable, so that the dustproof component 6 can play a dustproof role whether the drive device 21 and the solar power supply device 5 are raised or lowered.

[0078] Please see Figure 10 The inner wall of the snap-fit ​​cover 52 is coaxially provided with an annular groove, and an annular hydrogel 521 is provided inside the annular groove. By providing an annular hydrogel 521 on the inner wall of the snap-fit ​​cover 52, when external water passes through the gap between the snap-fit ​​cover 52 and the outer shell assembly 1, the annular hydrogel 521 expands when it comes into contact with water, and reduces the gap of the snap-fit ​​cover 52, thus preventing water from entering the device.

[0079] In summary, when the weather is clear, the fan device 2 and the solar power supply device 5 work simultaneously. At this time, the solar power supply device 5 can utilize the photovoltaic effect to convert solar energy into electrical energy and provide auxiliary power to the fan device 2. When the temperature inside the outer casing 1 is too high, the bimetallic strip 321 senses the temperature rise to the threshold and deforms itself, driving the motor 2110 and the latching cover 52 to rise, thereby increasing the movement gap 4 and increasing the flow of external air into the device. This allows more airflow to pass through the back of the solar power supply device 5 and the fan device 2, thereby improving the heat dissipation capacity of the fan device 2 and the solar power supply device 5. At the same time, it increases the air intake area of ​​the fan device 2, preventing airflow from congesting at the ventilation hole 11 below the outer casing 1 and reducing wind resistance. Meanwhile, when the motor 2110 is raised, the motor 2110 moves away from the fan blade 222, thereby preventing the motor 2110 from blocking the fan blade 222, further reducing wind resistance, thus saving the resistance encountered by the motor 2110 during operation and reducing power consumption.

[0080] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A solar-powered attic fan, characterized in that, include: A housing assembly (1) is mounted on the roof of the attic and is hollow inside; a fan device (2) includes a drive device (21) and a fan blade assembly (22), and the housing assembly (1) has a liftable mounting bracket assembly (3) inside, and one end of the drive device (21) is connected to the fan blade assembly (22) through a torque transmission component (24); a solar power supply device (5) for supplying power to the fan device (2), the solar power supply device (5) is mounted on the other end of the drive device (21) and is electrically connected to the drive device (21) through a power supply module; A movable gap (4) is provided between the fan device (2) and the solar power supply device (5). The mounting bracket assembly (3) is configured to sense the temperature inside the housing assembly (1). When the temperature rises, the mounting bracket assembly (3) drives the drive device (21) to rise and move away from the fan blade assembly (22) to reduce wind resistance. At the same time, the movable gap (4) is increased to increase the airflow through the solar power supply device (5) and the drive device (21) to assist in heat dissipation. The mounting bracket assembly (3) includes: a plurality of fixing brackets (31), wherein the outer shell assembly (1) is a columnar member, the plurality of fixing brackets (31) are spaced apart circumferentially inside the outer shell assembly (1), and a plurality of circumferentially spaced gaps are formed between the plurality of fixing brackets (31) and the outer shell assembly (1); a temperature sensing component (32), wherein a rectangular slide groove (311) extending vertically is provided on the side of the fixing brackets (31) away from the outer shell assembly (1), and the temperature sensing component (32) is assembled in the rectangular slide groove (311); The lifting block (33) is slidably mounted in the rectangular slide groove (311) on one side along the vertical direction. The temperature sensing component (32) is configured to sense the temperature rise inside the housing assembly (1) and drive the lifting block (33) to rise. The other side of the lifting block (33) is connected to the driving device (21).

2. A solar-powered attic fan according to claim 1, characterized in that, The temperature sensing component (32) includes: a bimetallic strip (321), wherein a rectangular groove (3111) is provided on the bottom side wall of the rectangular slide (311), and the bimetallic strip (321) is assembled in the rectangular groove (3111); a movable block (322), wherein the movable block (322) is slidably assembled on the bottom inner wall of the rectangular slide (311) along the radial direction of the outer shell assembly (1), wherein a first inclined surface (3221) is provided at the top of the movable block (322), and a second inclined surface (331) that matches the shape of the first inclined surface (3221) is provided at the bottom of the lifting block (33). When the temperature inside the outer shell assembly (1) rises, the bimetallic strip (321) is configured to drive the movable block (322) to move toward the central axis of the outer shell assembly (1), so that the first inclined surface (3221) and the second inclined surface (331) abut against each other, thereby driving the lifting block (33) to rise.

3. A solar-powered attic fan according to claim 1, characterized in that, The drive device (21) includes: a motor housing (211), a motor (2110) is provided inside the motor housing (211), the drive shaft of the motor (2110) extends out of one end of the motor housing (211), and a plurality of lifting blocks (33) are fixedly mounted on the outer wall of the motor housing (211) at circumferential intervals on the other side; a threaded housing cover (212), an annular threaded groove (2111) is coaxially opened on the other end of the motor housing (211), the threaded housing cover (212) is threaded into the threaded groove (2111), the threaded housing cover (212) is provided with an angle adjustment component (23), and is connected to the solar power supply device (5) through the angle adjustment component (23).

4. A solar-powered attic fan according to claim 3, characterized in that, The fan blade assembly (22) includes: a bracket (221), one end of the outer shell assembly (1) extends into the interior of the attic roof, and a plurality of spaced ventilation holes (11) are provided on the outer side of one end of the outer shell assembly (1), the plurality of ventilation holes (11) are arranged in a ring at one end of the outer shell assembly (1), and the bracket (221) is mounted on the inner wall of one end of the outer shell assembly (1); and a fan blade (222), a tapered roller bearing (223) coaxial with the drive shaft of the motor (2110) is mounted on the bracket (221), one side of the fan blade (222) is connected to the inner ring of the tapered roller bearing (223), the fan blade (222) is located below the ventilation holes (11), and the other side of the fan blade (222) is connected to the motor (2110) through a torque transmission component (24).

5. A solar-powered attic fan according to claim 4, characterized in that: The torque transmission component (24) includes: an extension tube (241), which is disposed on the other side of the fan blade (222), and the extension tube (241) is provided with a plurality of strip keyways (2411) spaced apart along its inner wall; and a stab rod (242), which is coaxially fixedly mounted on the drive shaft of the motor (2110), and the stab rod (242) is provided with a key bar (2421) on its outer circumference that matches the shape of the strip keyway (2411).

6. A solar-powered attic fan according to claim 3, characterized in that: The solar power supply device (5) includes a snap-fit ​​cover plate (52), which has a bowl-shaped cavity inside. One side of the snap-fit ​​cover plate (52) is connected to the angle adjustment member (23), and the other side is provided with a solar panel (53). The solar panel (53) is electrically connected to the drive device (21).

7. A solar-powered attic fan according to claim 6, characterized in that: The angle adjustment component (23) includes: a hollow spherical frame (231), a cylindrical cavity (2121) is provided inside the threaded compartment cover (212), the hollow spherical frame (231) is assembled outside the threaded compartment cover (212) and communicates with the cylindrical cavity (2121), a fixed filling medium (2122) is provided inside the cylindrical cavity (2121), a piston column (232) is slidably sealed inside the cylindrical cavity (2121), one end of the piston column (232) extends out of the cylindrical cavity (2121) and abuts against the motor outer compartment (211); A deflecting ball (233) is disposed inside the hollow spherical frame (231). One end of the deflecting ball (233) away from the cylindrical cavity (2121) protrudes from the hollow spherical frame (231), and the other end is fixedly connected to a plurality of resistance plates (234). One end of the resistance plate (234) extends into the cylindrical cavity (2121). An assembly plate (235) is fixedly assembled on one side of the deflecting ball (233), and the other side is connected and fixed to the snap-fit ​​cover plate (52).

8. A solar-powered attic fan according to claim 4, characterized in that: It also includes an annular dustproof assembly (6), which includes: a first elastic ring (61), which is coaxially mounted on the inner wall of the other end of the outer casing assembly (1); an annular dustproof net (62), the outer ring of which is coaxially fixedly mounted on the inner wall of the first elastic ring (61); and a second elastic ring (63), which is disposed inside the annular dustproof net (62), the inner ring of which is coaxially sleeved on the motor outer housing (211) and connected and fixed to the motor outer housing (211).

9. A solar-powered attic fan according to claim 6, characterized in that: The inner wall of the snap-fit ​​cover (52) is coaxially provided with an annular groove, and an annular hydrogel (521) is provided inside the annular groove.

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