Energy-saving building roof ventilation device

Abstract

The application relates to the technical field of building ventilation, and relates to an energy-saving building top ventilation device, which comprises a lower support, a support sleeve is arranged at the top of the lower support, a bottom support is rotationally connected to the support sleeve, ventilation fan blades are uniformly arranged on the bottom support, the top of the ventilation fan blades is fixed on a top support, a shielding frame is rotationally connected to the top support, a blockage prevention mechanism is slidably connected to the shielding frame, and the blockage prevention mechanism is connected with a positive ventilation mechanism; the ventilation fan blades are circumferentially distributed to form a spherical ventilation structure for passive ventilation, and the positive ventilation mechanism can be used for positive ventilation when the wind speed is too low; the blockage prevention mechanism is used for preventing the gaps between the ventilation fan blades from being blocked; and the low-temperature sealing mechanism is used for automatically cutting off the ventilation pipeline when the temperature of the building is too low, so that the external cold air is prevented from invading the building, and the heat loss in the building is reduced.

Description

Technical Field

[0001] This invention belongs to the field of building ventilation technology, and specifically relates to an energy-saving building roof ventilation device. Background Technology

[0002] Energy-efficient building roof ventilation structures are a building technology that optimizes roof design and utilizes natural or mechanically assisted ventilation to regulate indoor temperature and reduce energy consumption. Its core purpose is to reduce reliance on active cooling equipment such as air conditioners, improve building energy efficiency, and enhance indoor comfort. Existing energy-efficient building roof ventilation structures primarily rely on passive ventilation achieved by roof-mounted, unpowered ventilation fans. When natural wind power is insufficient, additional power structures are needed to drive these fans. While existing roof ventilation structures can generally meet daily usage needs, over time, the gaps between the fans can accumulate airborne particles, leading to blockages and reduced ventilation. Furthermore, at low temperatures, ventilation devices accelerate the loss of hot air from the building, and installing sealing structures requires personnel to remove or adjust these structures during seasonal changes. Therefore, designing an energy-efficient building roof ventilation system is essential. Summary of the Invention

[0003] The purpose of this invention is to provide an energy-saving building roof ventilation device with a simple structure and reasonable design in order to solve the above-mentioned problems.

[0004] The present invention achieves the above objectives through the following technical solutions:

[0005] An energy-saving building roof ventilation device includes a lower support, a support sleeve at the top of the lower support, a bottom bracket rotatably connected to the support sleeve, ventilation fan blades evenly arranged on the bottom bracket, the top of the ventilation fan blades fixed to a top bracket, a shielding frame rotatably connected to the top bracket, and an anti-clogging mechanism slidably connected to the shielding frame, the anti-clogging mechanism being connected to an active ventilation mechanism, a ventilation sleeve inside the lower support, and a low-temperature sealing mechanism at the bottom of the ventilation sleeve.

[0006] As a further optimization of the present invention, the anti-blocking mechanism includes a support platform slidably connected to the shielding frame. Limiting sleeves are evenly arranged on the side wall of the support platform. A telescopic slide is slidably connected in the limiting sleeve. Side sliders are symmetrically fixed on both sides of the telescopic slide. The side sliders are slidably connected in an arc-shaped bracket. The arc-shaped bracket is rotatably connected to the bottom of the top bracket. The telescopic slide is slidably connected between the arc-shaped brackets. One end of the telescopic slide is fixedly connected to a limiting shell.

[0007] As a further optimization of the present invention, the limiting shell is slidably connected to the limiting rod, and one end of the limiting rod is provided with a brush head, and the bottom of the other end of the limiting rod is provided with a shrinking support column. The shrinking support column is slidably connected to a slide rail evenly opened on the rotating platform. The rotating platform is slidably connected to a support platform, and an inclined slide rail is opened on the side wall of the support platform. A transmission guide rod is slidably connected in the inclined slide rail. The transmission guide rod is fixedly installed on the rotating platform. A docking platform is slidably connected to the bottom of the rotating platform, and a return spring is evenly arranged between the docking platform and the rotating platform. The docking platform is rotatably connected to the bottom end of the support platform.

[0008] As a further optimization of the present invention, the active ventilation mechanism includes a transmission frame fixedly connected to the bottom of the docking platform, a mounting platform slidably connected to the transmission frame, support rods evenly arranged on the side wall of the mounting platform, and one end of the support rods slidably connected to a groove in the inner wall of the transmission ring, the transmission ring being fixed in a bottom bracket, and alignment grooves evenly opened at the bottom of the transmission ring, an alignment frame being sleeved in the alignment groove, and the alignment frame being fixedly connected to the output end of the alignment cylinder, the alignment cylinder being fixed on the mounting platform.

[0009] As a further optimization of the present invention, a square block is slidably connected inside the transmission frame. The two sides of the square block are fixed in the driven wheel by connecting rods. The driven wheel is connected to the driving wheel by a belt. The driving wheel is fixedly connected to the output end of the high-pressure ventilation motor. The high-pressure ventilation motor is fixed on the inner wall of the support sleeve. An adjusting arm is rotatably connected to the bottom end of the transmission frame. The adjusting arm is slidably connected in the through groove on the side wall of the support sleeve.

[0010] As a further optimization of the present invention, one end of the adjusting arm is sleeved on the lifting platform, and the lifting platform is slidably connected to the top of the lower support. A lifting electric cylinder is fixedly installed at the top of the inner part of the lower support, and the output end of the lifting electric cylinder is fixed to the bottom of the lifting platform.

[0011] As a further optimization of the present invention, the low-temperature sealing mechanism includes a connecting sleeve fixed to the bottom end of the support sleeve, a connecting plate fixedly provided at the bottom end of the connecting sleeve, and a fixing sleeve and a guide frame evenly provided on the connecting plate.

[0012] As a further optimization of the present invention, a closing plate is rotatably connected to the fixed sleeve, and a connecting column is provided on the top of the closing plate, the connecting column being slidably connected in the guide frame.

[0013] As a further optimization of the present invention, a rotating plate is rotatably connected to the top of the connecting plate, and an adjusting slide is evenly provided on the rotating plate. The adjusting slide is slidably connected to the connecting column. A magnetic plate is evenly provided on the top of the rotating plate, and a supporting spring is provided on the magnetic plate. One end of the supporting spring is fixed to the mounting plate. The mounting plate is fixed to the side wall of the connecting sleeve. An iron core is sleeved in the mounting plate, and a coil is wound on the iron core.

[0014] The beneficial effects of this invention are as follows:

[0015] 1. This invention uses a top support and a bottom support to connect circumferentially distributed ventilation fan blades to form a spherical ventilation structure. When an external airflow blows, the ventilation fan blades will be forced to rotate the entire spherical ventilation structure, drawing out the internal air and achieving the actual effect of ventilating the building. When the external wind speed is too low to drive the spherical ventilation structure to rotate, an active ventilation mechanism is used as the power source to drive the spherical ventilation structure to rotate, making the ventilation effect more stable.

[0016] 2. In this invention, when cleaning the ventilation fan blades, the alignment cylinder pulls the alignment frame upwards. After the alignment frame is engaged in the alignment groove, the transmission frame rotates, driving the bottom support and the entire spherical ventilation structure to rotate via the transmission ring. Subsequently, the drive wheel on the powerful ventilation motor drives the driven wheel to rotate via a belt, causing the square block to drive the transmission frame to rotate. During rotation, the transmission guide rod is first subjected to force and slides upwards along the inclined slide. When it slides to the top of the inclined slide, it drives the rotating table to rotate synchronously via the transmission guide rod. At the same time, the rotating table rotates relative to the support platform as it moves upwards along the inclined slide. The evenly spaced slides on the turntable pull the limit rod to slide, causing the brush head and limit rod to slide into the gap between the ventilation fan blades. At the same time, the lifting cylinder drives the lifting platform and one end of the adjusting arm to move up and down reciprocally. During the movement, the transmission frame, docking platform and support platform can move up and down synchronously. During the up and down movement of the support platform, the side slider and the arc bracket work together to pull the telescopic slide along the curved surface of the ventilation fan blades. The reciprocating brush head cleans the gap between the ventilation fan blades, preventing airborne lint from adhering to the gap between the ventilation fan blades and ensuring the ventilation effect of the device.

[0017] 3. Under normal operating conditions, the supporting spring separates the magnetic plate and the iron core. At this time, the circumferentially distributed rotating plates rotate outward and unfold, opening the bottom of the connecting sleeve. The reserved air duct inside the building and the spherical ventilation structure at the top are connected. When the temperature sensor installed in the air duct detects that the temperature inside the building is too low, the coil is energized to make the iron core magnetic. At this time, the magnetic plate drives the rotating plate to rotate closer to the iron core. During the rotation, the connecting column is pulled along the guide frame by adjusting the slide rail, causing the sealing plate to rotate towards the axis of the connecting sleeve. After the sealing plates come into contact with each other, the entire connecting sleeve is closed, physically cutting off the connection between the reserved air duct inside the building and the spherical ventilation structure at the top. At the same time, the heat generated by the energized coil is collected at the inner top of the lower support, preventing cold air from entering the building and reducing heat loss inside the building. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the installation position of the lifting electric cylinder in this invention;

[0020] Figure 3 This is a schematic diagram of the low-temperature sealing mechanism in this invention;

[0021] Figure 4 This is an exploded structural diagram of the low-temperature sealing mechanism in this invention;

[0022] Figure 5 This is a schematic diagram of the state of the low-temperature sealing mechanism when it is closed in this invention;

[0023] Figure 6 This is a schematic diagram showing the installation position of the active ventilation mechanism in this invention;

[0024] Figure 7 This is a schematic diagram showing the installation position of the anti-clogging mechanism in this invention;

[0025] Figure 8 This is an exploded structural diagram of the anti-clogging mechanism in this invention;

[0026] Figure 9 yes Figure 8 A magnified view of a portion of region A in the middle;

[0027] Figure 10 yes Figure 8 A magnified view of a portion of region B in the middle;

[0028] Figure 11 This is a schematic diagram showing the location of the inclined slide in this invention;

[0029] Figure 12 This is a partial connection diagram of the anti-blocking mechanism in this invention;

[0030] Figure 13 This is a partial connection diagram of the active ventilation mechanism in this invention.

[0031] In the diagram: 1. Lower support; 2. Support sleeve; 3. Bottom bracket; 4. Ventilation fan blade; 5. Anti-clogging mechanism; 6. Active ventilation mechanism; 9. Low-temperature sealing mechanism; 10. Ventilation sleeve; 11. Top bracket; 12. Shielding frame; 501. Support platform; 502. Limiting sleeve; 503. Telescopic slide; 504. Side slider; 505. Arc-shaped bracket; 506. Limiting shell; 507. Limiting rod; 508. Brush head; 509. Retractable support column; 510. Rotary table; 511. Angled slide; 512. Transmission guide rod; 513. Docking platform; 514. Return spring; 601. Transmission frame; 602. Mounting platform; 603, support rod; 604, transmission ring; 605, alignment groove; 606, alignment frame; 607, alignment cylinder; 608, square block; 609, driven wheel; 610, driving wheel; 611, high-pressure ventilation motor; 612, adjusting arm; 613, lifting platform; 614, lifting electric cylinder; 901, connecting sleeve; 902, connecting plate; 903, fixing sleeve; 904, guide frame; 905, connecting column; 906, rotating plate; 907, adjusting slide; 908, magnetic plate; 909, support spring; 910, mounting plate; 911, iron core; 912, coil; 913, sealing plate. Detailed Implementation

[0032] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0033] Example: Please refer to Figures 1-13An energy-saving building roof ventilation device includes a lower support 1 fixedly installed on the top of a reserved air duct in the building. A support sleeve 2 is symmetrically arranged on the top of the lower support 1. A bottom bracket 3 is rotatably connected to the support sleeve 2. Ventilation fan blades 4 are evenly installed on the bottom bracket 3 by bolts. The tops of the ventilation fan blades 4 are fixed to a top bracket 11. The ventilation fan blades 4 evenly arranged on the top bracket 11 and the bottom bracket 3 form a spherical ventilation structure. When external airflow blows, the ventilation fan blades 4 are forced to rotate the entire spherical ventilation structure, drawing out the internal air and ventilating the building. A sliding rod at the bottom of a shielding frame 12 is rotatably connected to the center of the top of the top bracket 11 via a bearing. The top of the shielding frame 12 has a dome structure to prevent the accumulation of impurities. Anti-clogging devices are slidably connected to the shielding frame 12. Mechanism 5, the anti-clogging mechanism 5 is located between the ventilation fan blades 4. The anti-clogging mechanism 5 can clean the gaps between the ventilation fan blades 4 to prevent lint from clogging the gaps and ensure ventilation effect. The anti-clogging mechanism 5 is connected to the active ventilation mechanism 6. When the external wind force is insufficient, the active ventilation mechanism 6 drives the entire spherical ventilation structure to rotate. The lower support 1 is equipped with a ventilation sleeve 10. The bottom of the ventilation sleeve 10 is equipped with a low temperature sealing mechanism 9. A temperature sensor is installed in the air duct reserved in the building. When the temperature sensor detects that the internal temperature of the building is low, the low temperature sealing mechanism 9 is used to seal the ventilation path. At the same time, heat is generated in the lower support 1. Combined with physical sealing, a double-layer insulation effect is achieved to prevent external cold air from entering the building and reduce heat loss inside the building.

[0034] Please see Figures 6-13The anti-blocking mechanism 5 includes a support platform 501 slidably connected to a slide rod at the bottom of the shielding frame 12. Limiting sleeves 502 are evenly arranged on the side walls of the support platform 501. A telescopic slide 503 is slidably connected within the limiting sleeve 502. The telescopic slide 503 is slidably connected to an arc-shaped bracket 505. Side sliders 504, symmetrically arranged on both sides of the telescopic slide 503, are slidably connected to through slots on both sides of the arc-shaped bracket 505. The top of the arc-shaped bracket 505 is rotatably connected to the bottom of the top bracket 11. Furthermore, the spherical structure formed by the entire arc-shaped bracket 505 coincides with the center of the spherical ventilation structure formed by the ventilation fan blades 4. One end of the telescopic slide 503 is fixedly connected to a limiting shell 506, and a limiting rod 507 is slidably connected in the limiting shell 506. A brush head 508 is provided at one end of the limiting rod 507. During the operation of the anti-clogging mechanism 5, the brush head 508 is located in the gap between two adjacent ventilation fan blades 4. A retractable support column 509 is provided at the bottom of the other end of the limiting rod 507. The retractable support column 509 slides... The rotary table 510 is slidably connected to the bottom of the support platform 501 via evenly spaced slide tracks. An inclined slide track 511 is provided on the side wall of the support platform 501, and a transmission guide rod 512 is slidably connected within the inclined slide track 511. The transmission guide rod 512 is fixedly mounted on the rotary table 510. A docking platform 513 is slidably connected to the bottom of the rotary table 510, and return springs 514 are evenly distributed between the docking platform 513 and the rotary table 510. The docking platform 513 rotates... When the docking platform 513 is not powered, the spring force of the reset spring 514 will pull the rotating platform 510 down when it is connected to the bottom of the support platform 501. During the downward movement, the transmission guide rod 512 will slide down along the inclined slide 511, thereby causing the support platform 501 and the rotating platform 510 to rotate relative to each other. The sliding limit rod 507 is pulled to slide through the evenly opened slide on the rotating platform 510, causing the brush head 508 and the limit rod 507 to retract into the interior of the entire spherical ventilation structure and detach from the ventilation fan blade 4.

[0035] Please see Figures 6-10 and Figure 13The active ventilation mechanism 6 includes a transmission frame 601 fixedly connected to the bottom of the docking platform 513. The transmission frame 601 has a cross-section of a square tube with slots on both sides. A mounting platform 602 is slidably connected to the transmission frame 601. Support rods 603 are evenly arranged on the side wall of the mounting platform 602, and a spherical protrusion at one end of the support rod 603 is slidably connected to an annular groove on the inner wall of the transmission ring 604. The transmission ring 604 is fixed in the bottom bracket 3, and the bottom of the transmission ring 604 is evenly provided with alignment grooves 605. The number of alignment grooves 605 is the same as the number of ventilation fan blades 4. A positioning frame 606 is fitted into the positioning groove 605 and is fixedly connected to the output end of the positioning cylinder 607. The positioning cylinder 607 is fixed to a support plate on the mounting platform 602. When active ventilation is required, the positioning cylinder 607 pulls the positioning frame 606 upward. After the positioning frame 606 is engaged in the positioning groove 605, the transmission frame 601 can drive the bottom support 3 and the entire spherical ventilation structure to rotate through the transmission ring 604 during rotation. A square block 608 is slidably connected inside the transmission frame 601, and the square blocks 608 are symmetrically arranged on both sides. The connecting rod passes through the grooves on both sides of the transmission frame 601 and is fixed to the inner wall of the driven wheel 609. The rotation axis of the driven wheel 609 coincides with the rotation axis of the transmission frame 601. The driven wheel 609 is connected to the driving wheel 610 through a belt. The driving wheel 610 is fixedly connected to the output end of the forced ventilation motor 611. The forced ventilation motor 611 is fixed to the inner wall of the support sleeve 2. An adjusting arm 612 is rotatably connected to the bottom end of the transmission frame 601. The adjusting arm 612 is slidably connected in the through groove on the side wall of the support sleeve 2. One end of the adjusting arm 612 is sleeved on the lifting platform 613. The lifting platform 613 is slidably connected to the top of the lower support 1. The upper end of the lower support 1 is fixedly installed with a lifting electric cylinder 614. The output end of the lifting electric cylinder 614 is fixed to the bottom of the lifting platform 613. During the up-and-down movement of the adjusting arm 612, the transmission frame 601 can be driven to move up and down synchronously. During the movement, the docking platform 513 and the support platform 501 can be driven to move up and down synchronously. During the up-and-down movement of the support platform 501, the telescopic slide 503 is pulled along the curved surface of the ventilation fan blade 4 by the cooperation of the side slider 504 and the arc bracket 505.

[0036] Please see Figures 2-5The low-temperature sealing mechanism 9 includes a connecting sleeve 901 fixed to the bottom end of the support sleeve 2. A connecting plate 902 is fixedly provided at the bottom end of the connecting sleeve 901. Fixed sleeves 903 and guide frames 904 are evenly arranged on the connecting plate 902. The fixed sleeves 903 are rotatably connected to the cylinder on the sealing plate 913. A sealing gasket is provided at the edge of the sealing plate 913. A connecting post 905 is provided at the top of the sealing plate 913. The connecting post 905 is slidably connected in the guide frame 904. The connecting plate 902... A rotating plate 906 is rotatably connected to the top of the sleeve 901. Adjusting slides 907 are evenly distributed on the rotating plate 906, and the adjusting slides 907 are slidably connected to connecting columns 905. Magnetic plates 908 are evenly distributed on the top of the rotating plate 906, and support springs 909 are installed on the magnetic plates 908. One end of the support spring 909 is fixed to a mounting plate 910, which is fixed to the side wall of the connecting sleeve 901. An iron core 911 is sleeved in the mounting plate 910, and a coil is wound around the iron core 911. 912. Under normal operating conditions, the support spring 909 separates the magnetic plate 908 and the iron core 911. At this time, the circumferentially distributed rotating plates 906 rotate outward and unfold, opening the bottom of the connecting sleeve 901. The reserved air duct inside the building and the spherical ventilation structure at the top are connected. When the temperature sensor installed in the air duct detects that the temperature inside the building is too low, the coil 912 is energized, causing the iron core 911 to generate magnetism. At this time, the magnetic plate 908 drives the rotating plate 906 to rotate closer to the iron core 911. During the rotation, the connecting column 905 is pulled along the guide frame 904 by the adjusting slide 907, causing the closing plate 913 to rotate towards the axis of the connecting sleeve 901. After the closing plates 913 come into contact with each other, the entire connecting sleeve 901 is closed, physically cutting off the connection between the reserved air duct inside the building and the spherical ventilation structure at the top. At the same time, the heat generated by the energized coil 912 is collected at the inner top of the lower support 1, preventing cold air from entering the building and reducing heat loss inside the building.

[0037] It should be noted that, in use, this energy-saving building roof ventilation device is first installed on the top of the building's pre-reserved air duct, sealing off the entire duct. The top support 11 and bottom support 3, together with the circumferentially distributed ventilation fan blades 4, form a spherical ventilation structure. When external airflow blows, the ventilation fan blades 4 are forced to rotate the entire spherical ventilation structure, drawing out the internal air and achieving passive ventilation of the building. When cleaning the ventilation fan blades 4, the alignment cylinder 607 pulls the alignment frame 606 upward. After the alignment frame 606 engages with the alignment groove 605, the transmission frame 601 rotates... During the process, the bottom support 3 and the entire spherical ventilation structure can be rotated by the transmission ring 604. At this time, active ventilation can be performed by the strong ventilation motor 611. The driving wheel 610 on the strong ventilation motor 611 drives the driven wheel 609 to rotate through the belt, so that the square block 608 drives the transmission frame 601 to rotate. When rotating, the transmission guide rod 512 is subjected to force and will first slide up along the inclined slide 511. When it slides to the top of the inclined slide 511, it drives the rotating table 510 to rotate synchronously through the transmission guide rod 512. At the same time, the rotating table 510 moves up along the inclined slide 511 and rotates, and will interact with the support platform 501. The rotation of the rotating platform 510 causes the limiting rod 507 to slide along the evenly spaced slideways on the rotating platform 510, allowing the brush head 508 and the limiting rod 507 to slide into the gap between the ventilation fan blades 4. Simultaneously, the lifting cylinder 614 drives the lifting platform 613 to move one end of the adjusting arm 612 up and down reciprocally. During this movement, the transmission frame 601, docking platform 513, and support platform 501 move up and down synchronously. As the support platform 501 moves up and down, the cooperation of the side slider 504 and the arc-shaped bracket 505 pulls the telescopic slide 503 along the curved surface of the ventilation fan blades 4, allowing the brush head 508 and the limiting rod 507 to slide into the gap between the ventilation fan blades 4. 8. Clean the gap between the ventilation fan blades 4 to prevent airborne lint from adhering to the gap between the ventilation fan blades 4, thus ensuring the ventilation effect of the device; when there is no power input to the docking platform 513, the elastic force of the reset spring 514 will pull the rotating platform 510 down. During the downward movement, the transmission guide rod 512 will slide down along the inclined slide 511, thereby causing the support platform 501 and the rotating platform 510 to rotate relative to each other. The sliding limit rod 507 is pulled to slide through the evenly opened slide on the rotating platform 510, causing the brush head 508 and the limit rod 507 to retract into the interior of the entire spherical ventilation structure and detach from the ventilation fan blades 4;Under normal operating conditions, the support spring 909 separates the magnetic plate 908 and the iron core 911. At this time, the circumferentially distributed rotating plates 906 rotate outward and unfold, opening the bottom of the connecting sleeve 901. The reserved air duct inside the building and the spherical ventilation structure at the top are connected. When the temperature sensor installed in the air duct detects that the internal temperature of the building is too low, the coil 912 is energized, causing the iron core 911 to generate magnetism. At this time, the magnetic plate 908 drives the rotating plate 906 to rotate closer to the iron core 911. During the rotation, the connecting column 905 is pulled along the guide frame 904 by the adjusting slide 907, causing the closing plate 913 to rotate towards the axis of the connecting sleeve 901. After the closing plates 913 come into contact with each other, the entire connecting sleeve 901 closes, physically cutting off the connection between the reserved air duct inside the building and the spherical ventilation structure at the top. At the same time, the heat generated by the energized coil 912 is collected at the inner top of the lower support 1, preventing cold air from entering the building and reducing heat loss inside the building.

[0038] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. An energy efficient building roof ventilation device comprising a lower support (1), characterized in that: The top of the lower support (1) is provided with a support sleeve (2), the bottom support (3) is rotatably connected to the support sleeve (2), the bottom support (3) is uniformly provided with ventilation blades (4), the top of the ventilation blades (4) is fixed to the top support (11), the top support (11) is rotatably connected with the shielding frame (12), the shielding frame (12) is slidably connected with the anti-blocking mechanism (5), the anti-blocking mechanism (5) is connected with the active ventilation mechanism (6), the lower support (1) is internally provided with a ventilation sleeve (10), and the bottom of the ventilation sleeve (10) is provided with a low-temperature sealing mechanism (9). The anti-blocking mechanism (5) comprises a support table (501) slidably connected to the shielding frame (12), limit sleeves (502) are uniformly arranged on the side wall of the support table (501), telescopic sliding tables (503) are slidably connected in the limit sleeves (502), side sliding blocks (504) are symmetrically and fixedly arranged on both sides of the telescopic sliding table (503), the side sliding blocks (504) are slidably connected in the arc-shaped supports (505), the arc-shaped supports (505) are rotatably connected to the bottom of the top support (11), the telescopic sliding table (503) is slidably connected between the arc-shaped supports (505), one end of the telescopic sliding table (503) is fixedly connected with a limit shell (506), the limit shell (506) is slidably connected to a limit rod (507), one end of the limit rod (507) is provided with a brush head (508), the other end of the limit rod (507) is provided with a retractable support column (509) at the bottom, the retractable support column (509) is slidably connected in the slide way uniformly arranged in the rotating table (510), the rotating table (510) is slidably connected to the support table (501), and the side wall of the support table (501) is provided with a diagonal slide way (511), a transmission guide rod (512) is slidably connected in the diagonal slide way (511), the transmission guide rod (512) is fixedly arranged on the rotating table (510), the bottom of the rotating table (510) is slidably connected with a butt joint table (513), reset springs (514) are uniformly arranged between the butt joint table (513) and the rotating table (510), and the butt joint table (513) is rotatably connected to the bottom end of the support table (501).

2. An energy efficient building roof venting device as claimed in claim 1, wherein: The active ventilation mechanism (6) comprises a transmission frame (601) fixedly connected at the bottom of the docking table (513), a mounting table (602) is slidably connected on the transmission frame (601), support rods (603) are uniformly arranged on the side walls of the mounting table (602), one end of the support rods (603) is slidably connected in the sliding groove in the inner wall of a transmission ring (604), the transmission ring (604) is fixed in the bottom support (3), and position recesses (605) are uniformly arranged at the bottom of the transmission ring (604), a position frame (606) is sleeved in the position recess (605), and the position frame (606) is fixedly connected to the output end of a position air cylinder (607), and the position air cylinder (607) is fixed to the mounting table (602).

3. An energy efficient building roof venting device according to claim 2, wherein: The transmission frame (601) is slidably connected with a square block (608), the square block (608) is fixed in a driven wheel (609) through connecting rods, the driven wheel (609) is connected with a driving wheel (610) through a belt, the driving wheel (610) is fixedly connected with the output end of a strong ventilation motor (611), the strong ventilation motor (611) is fixed to the inner wall of the support sleeve (2), and the bottom end of the transmission frame (601) is rotatably connected with an adjusting arm (612), the adjusting arm (612) is slidably connected in the through groove in the side wall of the support sleeve (2).

4. An energy efficient building roof venting device according to claim 3, wherein: One end of the adjusting arm (612) is sleeved on a lifting table (613), and the lifting table (613) is slidably connected to the top of the lower support (1), a lifting electric cylinder (614) is fixedly installed at the inner top end of the lower support (1), and the output end of the lifting electric cylinder (614) is fixed to the bottom of the lifting table (613).

5. An energy efficient building roof venting device as claimed in claim 1, wherein: The low-temperature sealing mechanism (9) comprises a connecting sleeve (901) fixed at the bottom end of the support sleeve (2), a connecting plate (902) is fixedly arranged at the bottom end of the connecting sleeve (901), and a fixing sleeve (903) and a guide frame (904) are uniformly arranged on the connecting plate (902).

6. An energy efficient building roof venting device according to claim 5, wherein: A sealing plate (913) is rotatably connected to the fixing sleeve (903), a connecting column (905) is arranged at the top of the sealing plate (913), and the connecting column (905) is slidably connected in the guide frame (904).

7. An energy efficient building roof venting device according to claim 6, wherein: A rotating plate (906) is rotatably connected to the top of the connecting plate (902), adjusting slide ways (907) are uniformly arranged on the rotating plate (906), the adjusting slide ways (907) are slidably connected with the connecting column (905), magnetic plates (908) are uniformly arranged at the top of the rotating plate (906), support springs (909) are arranged on the magnetic plates (908), one end of the support springs (909) is fixed to a mounting plate (910), the mounting plate (910) is fixed to the side wall of the connecting sleeve (901), an iron core (911) is sleeved in the mounting plate (910), and a coil (912) is wound on the iron core (911).

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