Safe and low-carbon energy-saving ventilation equipment

Abstract

The application discloses a safe and low-carbon energy-saving ventilation equipment, and relates to the technical field of ventilation equipment, which comprises a ventilation pipe, a mounting seat fixedly connected to the inner cavity of the ventilation pipe, a motor installed on the outer wall of the mounting seat, a rotating shaft connected to the output end of the motor, a filtering mechanism and a connecting mechanism. The filtering mechanism and the connecting mechanism are arranged, the motor drives the fan blade to rotate, the filter screen slowly rotates when the fan blade rotates, the scraper scrapes the surface of the filter screen when the filter screen slowly rotates, the dust scraped off falls into the collecting box for collection, dust on the filter screen is automatically cleaned and collected, dust scattering is prevented, environmental pollution is avoided, the collecting box is quickly installed and removed, dust in the collecting box is treated, and the inner cavity of the connecting seat is shielded by the baffle when the collecting box is removed, dust scattering is prevented.

Description

Technical Field

[0001] This invention relates to the field of ventilation equipment technology, specifically a safe and low-carbon energy-saving ventilation device. Background Technology

[0002] Fume hoods are an essential piece of laboratory furniture, serving the functions of exhaust and ventilation in laboratories. The fume hood has a two-tiered structure, with exhaust vents at the top for installing a fan. The upper cabinet contains a baffle plate, circuit control touch switches, power sockets, etc., and the viewing window is made of tempered glass and can move left and right or up and down for operation. The lower cabinet is designed like a workbench, with a work surface on top and the cabinet body below. When using it, the user stands or sits in front of the cabinet, lowering the glass door as much as possible, and reaches their hand under the door to conduct experiments. Because the exhaust fan draws air inward through the open door, harmful gases will not escape in large quantities under normal circumstances.

[0003] Traditional laboratory fume hoods only serve as auxiliary ventilation for experimental benches and do not have filtration and purification functions. In order to improve environmental protection, current laboratory fume hoods have added chemical waste gas treatment modules. The fume hoods used in laboratories filter out gases volatilized from harmful chemical reagents used in experiments and particulate matter volatilized from microbial reagents. The filtered levels are far below the national indoor air quality standards. It is a highly efficient, safe, and environmentally friendly environmental purification technology. The upgrade of fume hoods and the improvement of exhaust quality have been recognized by the international academic community.

[0004] Currently, regardless of whether the laboratory fume hood has added filtration and purification functions, it must have a dust filter inside the ventilation duct. During the use of the ventilation duct, a large amount of dust adheres to the filter, which can easily cause clogging and affect the use of the ventilation duct. Manual cleaning is required, which is time-consuming and labor-intensive. In addition, manual cleaning can easily cause dust to escape and affect the environment. In order to facilitate the handling of dust on the filter, a safe, low-carbon and energy-saving ventilation device is provided. Summary of the Invention

[0005] The purpose of this invention is to provide a safe, low-carbon, and energy-saving ventilation device to facilitate the handling of dust on the filter screen.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a safe and low-carbon energy-saving ventilation device, comprising a ventilation duct, an installation base fixedly connected to the inner cavity of the ventilation duct, a motor mounted on the outer wall of the installation base, a rotating shaft connected to the output end of the motor, a fan blade fixedly connected to one end of the rotating shaft, the motor driving the fan blade to rotate through the rotating shaft, the rotation of the fan blade driving outside air into the ventilation duct, and the ventilation duct filtering the incoming air through a filtration mechanism;

[0007] The filtration mechanism includes a ring-shaped filter screen rotatably connected to the air inlet of the ventilation duct. A circular plate is fixedly connected to one end of the filter screen, and a ratchet is fixedly connected to one end of the circular plate inside the ventilation duct. A locking block is slidably connected to the bottom end of the ratchet inside the ventilation duct. A first spring connects the locking block to the ventilation duct, and the locking block engages with the ratchet under the elastic force of the first spring, allowing the ratchet to rotate only in one direction. When a connecting seat is fixedly connected to the bottom end of the ventilation duct, the filter screen extends into the inner cavity of the connecting seat. A collection box is installed at the bottom end of the connecting seat, and a scraper is fixedly connected to the inner cavity of the connecting seat. The scraper scrapes the outer wall of the filter screen, and the collection box collects the scraped dust. The collection box is installed at the bottom end of the connecting seat via a connecting mechanism.

[0008] As a further embodiment of the present invention: the filtering mechanism further includes a first bevel gear, which is fixedly connected to the outer wall of the rotating shaft. A second bevel gear is rotatably connected to the outer wall of the first bevel gear inside the mounting base. A connecting shaft is fixedly connected to one end of the second bevel gear. A rotating block is fixedly connected to one end of the connecting shaft inside the ventilation pipe. A protrusion is fixedly connected to the outer wall of the rotating block. A rotating groove is provided inside the ventilation pipe for the rotating block to rotate. The rotation of the rotating shaft drives the connecting shaft to rotate through the first and second bevel gears. The rotation of the connecting shaft drives the rotating block to rotate within the rotating groove. A movable seat is slidably connected inside the ventilation pipe above the ratchet. A second spring is connected between the movable seat and the ventilation pipe. A push rod is fixedly connected to one end of the movable seat. The push rod extends into the inner cavity of the rotating groove. A toothed plate extending out of the movable seat is slidably connected inside the movable seat. A third spring is connected between the toothed plate and the movable seat.

[0009] As a further embodiment of the present invention: the connecting mechanism includes a connecting block, the connecting block being fixedly connected to the bottom end of the connecting seat, a fixing groove being provided on the inner wall of the collection box, a fixing block extending out of the connecting block being slidably connected inside the connecting block, a fourth spring being connected between the fixing block and the connecting block, a downward pressure rod being slidably connected inside the connecting block above the fixing block, a lead screw being connected to the inner wall of the downward pressure rod, the lead screw being rotatably connected to the inside of the connecting seat, a third bevel gear being fixedly connected to the top end of the lead screw, a fourth bevel gear being rotatably connected inside the connecting seat to the outer wall of the third bevel gear, and a rotating column being fixedly connected to one end of the fourth bevel gear to the outer wall of the connecting seat.

[0010] As a further embodiment of the present invention: the connecting mechanism further includes a baffle, the baffle is rotatably connected to the inner cavity of the connecting seat, one end of the baffle is fixedly connected to a spur gear, the inside of the connecting seat is slidably connected to the outer wall of the spur gear, a displacement block is connected between the top end of the displacement block and the connecting seat, and the bottom end of the displacement block extends to the bottom of the connecting seat.

[0011] As a further embodiment of the present invention: the first bevel gear meshes with the second bevel gear, and the end of the push rod that extends into the inner cavity of the rotating groove is provided with an arc-shaped surface.

[0012] As a further embodiment of the present invention: the bottom end of the toothed plate is provided with ratchet teeth, which are matched with the ratchet wheel.

[0013] As a further embodiment of the present invention: the outer wall of the connecting block is fitted with the inner wall of the collection box, and the inner wall of the fixing groove is fitted with the outer wall of the fixing block.

[0014] As a further embodiment of the present invention: the top end of the fixing block is provided with an inclined surface, the bottom end of the pressing rod is in contact with the inclined surface, the top end of the pressing rod is provided with a threaded hole, the threaded hole matches the lead screw, and the third bevel gear meshes with the fourth bevel gear.

[0015] As a further embodiment of the present invention: the outer wall of the displacement block is provided with gear teeth, the gear teeth meshing with the spur gear, and the displacement block is L-shaped.

[0016] As a further embodiment of the present invention: a chemical waste gas treatment module is also provided inside the ventilation pipe, the outer edge of the chemical waste gas treatment module is sealed and fitted inside the ventilation pipe, and the chemical waste gas treatment module (8) is located inside the annular filter screen.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] By setting up a filtration mechanism and a connecting mechanism, the motor drives the fan blades to rotate. When the fan blades rotate, the filter screen rotates slowly. As the filter screen rotates slowly, the scraper scrapes the surface of the filter screen, and the scraped dust enters the collection box for collection. This facilitates automatic cleaning and collection of dust on the filter screen, preventing dust from scattering and causing environmental pollution. At the same time, the collection box can be quickly installed and removed to handle the dust inside. When the collection box is removed, a baffle covers the inner cavity of the connecting seat to prevent dust from scattering. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a cross-sectional view of the ventilation duct of the present invention;

[0021] Figure 3 This is a cross-sectional view of the mounting base of the present invention;

[0022] Figure 4 This is a schematic diagram of the installation of the movable base of the present invention;

[0023] Figure 5 This is a cross-sectional view of the movable seat of the present invention;

[0024] Figure 6 This is a cross-sectional view of the connector of the present invention;

[0025] Figure 7 This is a schematic diagram of the installation of the baffle of the present invention.

[0026] In the diagram: 1. Ventilation duct; 2. Mounting base; 3. Motor; 4. Rotating shaft; 5. Fan blade; 6. Filtering mechanism; 601. Filter screen; 602. Circular plate; 603. Ratchet; 604. Locking block; 605. First spring; 606. Connecting seat; 607. Collection box; 608. Scraper; 609. First bevel gear; 610. Second bevel gear; 611. Connecting shaft; 612. Rotating block; 613. Protrusion; 614. Rotating groove; 615. Movable seat; 616. Second spring; 617. Top rod; 618. Toothed plate; 619. Third spring; 7. Connecting mechanism; 701. Connecting block; 702. Fixing groove; 703. Fixing block; 704. Fourth spring; 705. Downward pressure rod; 706. Lead screw; 707. Third bevel gear; 708. Fourth bevel gear; 709. Rotating column; 710. Baffle; 711. Spur gear; 712. Displacement block; 713. Fifth spring; 8. Chemical waste gas treatment module. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figures 1-7In this embodiment of the invention, a safe and low-carbon energy-saving ventilation device adopts a narrow frame design. All control components are no longer located on the side frame but are instead positioned below the experimental chamber, thereby expanding the width of the experimental space and making operation more convenient. The ventilation device of this invention includes a ventilation pipe 1. A mounting base 2 is fixedly connected to the inner cavity of the ventilation pipe 1. A motor 3 is mounted on the outer wall of the mounting base 2. A rotating shaft 4 is connected to the output end of the motor 3. A fan blade 5 is fixedly connected to one end of the rotating shaft 4. The motor 3 drives the fan blade 5 to rotate via the rotating shaft 4. The rotation of the fan blade 5 draws outside air into the ventilation pipe 1. The ventilation pipe 1 filters the incoming air through a filter mechanism 6. The filter mechanism 6 includes a circular filter screen 601, which is rotatably connected to the air inlet of the ventilation pipe 1. A circular plate 602 is fixedly connected to one end of the filter screen 601, and one end of the circular plate 602 is located at the ventilation... A ratchet 603 is fixedly connected inside the ventilation pipe 1. A locking block 604 is slidably connected inside the ventilation pipe 1 at the bottom end of the ratchet 603. A first spring 605 connects the locking block 604 and the ventilation pipe 1. The locking block 604 is engaged with the ratchet 603 by the elastic force of the first spring 605, so that the ratchet 603 can only rotate in one direction. When a connecting seat 606 is fixedly connected to the bottom end of the ventilation pipe 1, the filter screen 601 extends into the inner cavity of the connecting seat 606. A collection box 607 is installed at the bottom end of the connecting seat 606. A scraper 608 is fixedly connected to the inner cavity of the connecting seat 606. The scraper 608 is used to scrape the outer wall of the filter screen 601. The collection box 607... 7 is used to collect the scraped dust; the collection box 607 is installed at the bottom of the connecting seat 606 via the connecting mechanism 7. The filtering mechanism 6 also includes a first bevel gear 609, which is fixedly connected to the outer wall of the rotating shaft 4. A second bevel gear 610 is rotatably connected to the outer wall of the first bevel gear 609 inside the mounting seat 2. A connecting shaft 611 is fixedly connected to one end of the second bevel gear 610. A rotating block 612 is fixedly connected to one end of the connecting shaft 611 inside the ventilation pipe 1. A protrusion 613 is fixedly connected to the outer wall of the rotating block 612. A rotating groove 614 for the rotating block 612 to rotate is opened inside the ventilation pipe 1. The rotating shaft 4 rotates, driving the connecting shaft 611 to rotate via the first bevel gear 609 and the second bevel gear 610. The rotation of the connecting shaft 611 drives the rotating block 612 to rotate within the rotating groove 614. Inside the ventilation pipe 1, above the ratchet 603, a movable seat 615 is slidably connected. A second spring 616 connects the movable seat 615 to the ventilation pipe 1. One end of the movable seat 615 is fixedly connected to a push rod 617, which extends into the inner cavity of the rotating groove 614. Inside the movable seat 615, a toothed plate 618 extends out of the movable seat 615 and is slidably connected. A third spring 619 connects the toothed plate 618 to the movable seat 615.

[0029] In this embodiment: the motor 3 drives the rotating shaft 4 to rotate, the rotating shaft 4 drives the fan blade 5 to rotate, the fan blade 5 drives outside air into the ventilation pipe 1, and when the air passes through the filter screen 601, the filter screen 601 filters the dust in the air.

[0030] Simultaneously, the rotation of the rotating shaft 4 drives the first bevel gear 609 to rotate synchronously. The rotation of the first bevel gear 609 drives the second bevel gear 610 to rotate, which in turn drives the connecting shaft 611 to rotate. The rotation of the connecting shaft 611 drives the rotating block 612 to rotate, and the rotation of the rotating block 612 drives the protrusion 613 to move in a circular motion. During the circular motion of the protrusion 613, it contacts the push rod 617, pushing the push rod 617 to move. The movement of the push rod 617 drives the movable seat 615 to move, thus affecting the second spring 616. The compression causes the movable seat 615 to move, which in turn drives the ratchet 603 to rotate via the toothed plate 618. The rotation of the ratchet 603 drives the circular plate 602 to rotate, which in turn drives the filter screen 601 to rotate. When the protrusion 613 separates from the push rod 617, the movable seat 615 is reset by the elastic force of the second spring 616. At this time, the locking block 604 is engaged with the ratchet 603 by the elastic force of the first spring 605, so that the ratchet 603 cannot rotate in the opposite direction. As a result, when the fan blade 5 rotates, the filter screen 601 rotates slowly.

[0031] When the filter screen 601 rotates slowly, the scraper 608 scrapes the surface of the filter screen 601, and the scraped dust enters the collection box 607 for collection. This facilitates automatic cleaning and collection of dust on the filter screen 601, preventing dust from spreading and causing environmental pollution.

[0032] Please refer to this carefully. Figure 6 and Figure 7The connecting mechanism 7 includes a connecting block 701, which is fixedly connected to the bottom end of the connecting seat 606. A fixing groove 702 is provided on the inner wall of the collection box 607. A fixing block 703 extending from the connecting block 701 is slidably connected inside the connecting block 701. A fourth spring 704 connects the fixing block 703 and the connecting block 701. A downward pressure rod 705 is slidably connected inside the connecting block 701 above the fixing block 703. A lead screw 706 is connected to the inner wall of the downward pressure rod 705. The lead screw 706 is rotatably connected to the inside of the connecting seat 606. A third bevel gear 707 is fixedly connected to the top end of the lead screw 706. Inside the seat 606, a fourth bevel gear 708 is rotatably connected to the outer wall of the third bevel gear 707. One end of the fourth bevel gear 708 is fixedly connected to a rotating column 709 on the outer wall of the connecting seat 606. The connecting mechanism 7 also includes a baffle 710, which is rotatably connected to the inner cavity of the connecting seat 606. One end of the baffle 710 is fixedly connected to a spur gear 711. Inside the connecting seat 606, a displacement block 712 is slidably connected to the outer wall of the spur gear 711. A fifth spring 713 is connected between the top end of the displacement block 712 and the connecting seat 606. The bottom end of the displacement block 712 extends to the bottom of the connecting seat 606.

[0033] In this embodiment: when the collection box 607 is removed, the rotating column 709 is rotated, which drives the fourth bevel gear 708 to rotate, which in turn drives the third bevel gear 707 to rotate, which in turn drives the lead screw 706 to rotate, which in turn drives the lower pressure rod 705 to move, which pushes the fixing block 703 out of the fixing groove 702, thus removing the fixing of the collection box 607 and removing the collection box 607.

[0034] When the collection box 607 is installed, the collection box 607 is fitted onto the outer wall of the connecting block 701. After completion, the rotating column 709 is released, and the fixing block 703 is displaced into the fixing groove 702 by the elastic force of the fourth spring 704, thereby fixing the collection box 607.

[0035] When the collection box 607 is not installed, the baffle 710 covers the inner cavity of the connecting seat 606, and the displacement block 712 extends out of the connecting seat 606. When the collection box 607 is installed, the collection box 607 is fitted onto the outer wall of the connecting block 701, and the collection box 607 contacts the displacement block 712, pushing the displacement block 712 to move. The movement of the displacement block 712 drives the spur gear 711 to rotate, and the rotation of the spur gear 711 drives the baffle 710 to rotate, opening the inner cavity of the connecting seat 606. This facilitates the quick installation and removal of the collection box 607, thereby cleaning the dust inside the collection box 607. At the same time, when the collection box 607 is removed, the baffle 710 covers the inner cavity of the connecting seat 606 to prevent dust from scattering.

[0036] Please refer to this carefully. Figure 3 and Figure 4 The first bevel gear 609 meshes with the second bevel gear 610, and the end of the push rod 617 that extends into the inner cavity of the rotating groove 614 is provided with an arc-shaped surface.

[0037] In this embodiment: the rotating shaft 4 rotates while driving the first bevel gear 609 to rotate synchronously. The rotation of the first bevel gear 609 drives the second bevel gear 610 to rotate. The rotation of the second bevel gear 610 drives the connecting shaft 611 to rotate. The rotation of the connecting shaft 611 drives the rotating block 612 to rotate. The rotation of the rotating block 612 drives the protrusion 613 to perform circumferential displacement.

[0038] Please refer to this carefully. Figure 5 The bottom end of the toothed plate 618 is provided with ratchet teeth, which are matched with the ratchet 603.

[0039] In this embodiment: During the circumferential displacement of the protrusion 613, it contacts the push rod 617, pushing the push rod 617 to move. The movement of the push rod 617 causes the movable seat 615 to move, compressing the second spring 616. The movement of the movable seat 615 drives the ratchet 603 to rotate through the toothed plate 618. The rotation of the ratchet 603 drives the circular plate 602 to rotate, and the rotation of the circular plate 602 drives the filter screen 601 to rotate. When the protrusion 613 separates from the push rod 617, the movable seat 615 is reset by the elastic force of the second spring 616. At this time, the locking block 604 is engaged with the ratchet 603 by the elastic force of the first spring 605, so that the ratchet 603 cannot rotate in the opposite direction. As a result, when the fan blade 5 rotates, the filter screen 601 rotates slowly.

[0040] Please refer to this carefully. Figure 6 and Figure 7 The outer wall of the connecting block 701 is in contact with the inner wall of the collection box 607, and the inner wall of the fixing groove 702 is in contact with the outer wall of the fixing block 703.

[0041] In this embodiment: when the collection box 607 is installed, the collection box 607 is fitted onto the outer wall of the connecting block 701. After completion, the rotating column 709 is released, and the fixing block 703 is displaced into the fixing groove 702 by the elastic force of the fourth spring 704, thereby fixing the collection box 607.

[0042] Please refer to this carefully. Figure 7 The top of the fixed block 703 is provided with an inclined surface, the bottom of the lower pressure rod 705 is in contact with the inclined surface, the top of the lower pressure rod 705 is provided with a threaded hole, the threaded hole matches the lead screw 706, and the third bevel gear 707 meshes with the fourth bevel gear 708.

[0043] In this embodiment: when the collection box 607 is removed, the rotating column 709 is rotated, which drives the fourth bevel gear 708 to rotate. The fourth bevel gear 708 drives the third bevel gear 707 to rotate. The third bevel gear 707 drives the lead screw 706 to rotate. The lead screw 706 drives the lower pressure rod 705 to move. The movement of the lower pressure rod 705 pushes the fixing block 703 out of the fixing groove 702, thus releasing the fixation of the collection box 607 and removing the collection box 607.

[0044] Please refer to this carefully. Figure 7 The outer wall of the displacement block 712 is provided with gear teeth, which mesh with the spur gear 711. The displacement block 712 is L-shaped.

[0045] In this embodiment: when the collection box 607 is not installed, the baffle 710 blocks the inner cavity of the connecting seat 606, and the displacement block 712 extends out of the connecting seat 606; when the collection box 607 is installed, the collection box 607 is sleeved on the outer wall of the connecting block 701, the collection box 607 contacts the displacement block 712, pushing the displacement block 712 to move, the movement of the displacement block 712 drives the spur gear 711 to rotate, the rotation of the spur gear 711 drives the baffle 710 to rotate, opening the inner cavity of the connecting seat 606.

[0046] Please refer to this carefully. Figure 2 The ventilation duct 1 is also equipped with a chemical waste gas treatment module 8. The outer edge of the chemical waste gas treatment module 8 is sealed and fitted inside the ventilation duct 1, and the chemical waste gas treatment module 8 is located inside the annular filter screen 601.

[0047] In this embodiment: the chemical waste gas treatment module 8 is an existing treatment module for use in chemical laboratories to purify harmful gases. The chemical waste gas treatment module 8 is designed inside the ventilation duct 1, which can filter and purify the air. It is also located inside the annular filter screen 601. The annular filter screen 601 intercepts dust, preventing a large amount of dust from adhering to the chemical waste gas treatment module 8 and affecting its service life.

[0048] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A safe and low-carbon energy-saving ventilation device, comprising a ventilation duct, a mounting base fixedly connected to the inner cavity of the ventilation duct, a motor mounted on the outer wall of the mounting base, a rotating shaft connected to the output end of the motor, a fan blade fixedly connected to one end of the rotating shaft, the motor driving the fan blade to rotate via the rotating shaft, the rotation of the fan blade drawing outside air into the ventilation duct, characterized in that... The ventilation duct filters the incoming air through a filtration mechanism; The filtration mechanism includes a ring-shaped filter screen rotatably connected to the air inlet of the ventilation duct. A circular plate is fixedly connected to one end of the filter screen, and a ratchet is fixedly connected to the other end of the circular plate inside the ventilation duct. A locking block is slidably connected to the bottom end of the ratchet inside the ventilation duct. A first spring connects the locking block to the ventilation duct, and the locking block engages with the ratchet under the elastic force of the first spring, allowing the ratchet to rotate only in one direction. When a connecting seat is fixedly connected to the bottom end of the ventilation duct, the filter screen extends into the inner cavity of the connecting seat. A collection box is installed at the bottom end of the connecting seat, and a scraper is fixedly connected to the inner cavity of the connecting seat. The scraper scrapes the outer wall of the filter screen, and the collection box collects the scraped dust. The collection box is installed at the bottom end of the connecting seat via a connecting mechanism. The ventilation duct is also equipped with a chemical waste gas treatment module. The outer edge of the chemical waste gas treatment module is sealed and fitted inside the ventilation duct, and the chemical waste gas treatment module is located inside the annular filter screen. The filtration mechanism also includes a first bevel gear, which is fixedly connected to the outer wall of the rotating shaft. A second bevel gear is rotatably connected to the outer wall of the first bevel gear inside the mounting base. A connecting shaft is fixedly connected to one end of the second bevel gear. A rotating block is fixedly connected to one end of the connecting shaft inside the ventilation pipe. A protrusion is fixedly connected to the outer wall of the rotating block. A rotating groove for the rotating block to rotate is opened inside the ventilation pipe. The rotation of the rotating shaft drives the connecting shaft to rotate through the first and second bevel gears. The rotation of the connecting shaft drives the rotating block to rotate in the rotating groove. A movable seat is slidably connected to the inside of the ventilation pipe above the ratchet. A second spring is connected between the movable seat and the ventilation pipe. A push rod is fixedly connected to one end of the movable seat. The push rod extends into the inner cavity of the rotating groove. A toothed plate extending out of the movable seat is slidably connected inside the movable seat. A third spring is connected between the toothed plate and the movable seat.

2. The safe and low-carbon energy-saving ventilation equipment according to claim 1, characterized in that, The connecting mechanism includes a connecting block, which is fixedly connected to the bottom of the connecting seat. A fixing groove is provided on the inner wall of the collection box. A fixing block extending out of the connecting block is slidably connected inside the connecting block. A fourth spring is connected between the fixing block and the connecting block. A downward pressure rod is slidably connected inside the connecting block above the fixing block. A lead screw is connected to the inner wall of the downward pressure rod. The lead screw is rotatably connected to the inside of the connecting seat. A third bevel gear is fixedly connected to the top of the lead screw. A fourth bevel gear is rotatably connected inside the connecting seat to the outer wall of the third bevel gear. A rotating column is fixedly connected to one end of the fourth bevel gear to the outer wall of the connecting seat.

3. The safe and low-carbon energy-saving ventilation equipment according to claim 2, characterized in that, The connecting mechanism also includes a baffle plate, which is rotatably connected to the inner cavity of the connecting seat. A spur gear is fixedly connected to one end of the baffle plate. A displacement block is slidably connected to the outer wall of the spur gear inside the connecting seat. A fifth spring is connected between the top of the displacement block and the connecting seat. The bottom of the displacement block extends to the bottom of the connecting seat.

4. The safe and low-carbon energy-saving ventilation equipment according to claim 1, characterized in that, The first bevel gear meshes with the second bevel gear, and the end of the push rod that extends into the inner cavity of the rotating groove is provided with an arc-shaped surface.

5. A safe and low-carbon energy-saving ventilation device according to claim 1, characterized in that, The bottom end of the toothed plate is equipped with ratchet teeth, which match the ratchet wheel.

6. A safe and low-carbon energy-saving ventilation device according to claim 3, characterized in that, The outer wall of the connecting block fits into the inner wall of the collection box, and the inner wall of the fixing groove fits into the outer wall of the fixing block.

7. A safe and low-carbon energy-saving ventilation device according to claim 3, characterized in that, The top of the fixed block is provided with an inclined surface, the bottom end of the pressure rod is in contact with the inclined surface, the top of the pressure rod is provided with a threaded hole, the threaded hole matches the lead screw, and the third bevel gear meshes with the fourth bevel gear.

8. A safe and low-carbon energy-saving ventilation device according to claim 3, characterized in that, The outer wall of the displacement block is provided with gear teeth, which mesh with spur gears, and the displacement block is L-shaped.

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