A renewable self-cleaning ductless fume hood

Abstract

The present invention discloses a renewable self-cleaning ductless fume hood, belonging to the technical field of fume hoods, comprising: a cabinet body and a cleaning mechanism, air inlets are provided on both sides of the cabinet body, a filter is fixedly installed in the air inlet, a fan is arranged on the top of the cabinet body, the fan comprises a wind tube, a fan blade and a driving motor, the driving motor is fixedly installed in the wind tube, and the fan blade is fixedly connected to the output shaft of the driving motor; a linkage mechanism is arranged inside the wind tube, the linkage mechanism comprises a linkage blade and two horizontal shafts, a linkage shaft is fixedly installed in the linkage blade, and an active bevel gear is fixedly connected to the linkage shaft. The present invention can adjust the fan power according to the ventilation volume in the fume hood through the adjustment mechanism provided, so that the ventilation volume is dynamically balanced and the heat exchange effect is ensured, and the linkage mechanism and cleaning mechanism provided can realize automatic cleaning and alarm work when there is too much dust in the fume hood, thereby avoiding the continuous accumulation of dust affecting the operating stability of the fume hood.

Description

Technical Field

[0001] The invention relates to the technical field of fume hoods, and in particular to a regenerable self-cleaning ductless fume hood. Background Art

[0002] Ductless fume hood, also known as "ductless fume hood" or "clean air fume hood", is a semi-enclosed cabinet that uses air filtration technology to treat laboratory exhaust gas on-site. It uses directional gas flow to isolate operators from polluted air and protect experimenters from toxic and harmful chemical gases, dust and aerosols.

[0003] However, most of the current fume hoods lack the self-cleaning function and cannot monitor and clean the dust inside them. The dust inside the ventilation rails needs to be cleaned manually. As the dust accumulates, the ventilation efficiency of the fume hood decreases, which will affect the ventilation effect. Therefore, we propose a renewable self-cleaning ductless fume hood to solve this problem. Summary of the invention

[0004] The object of the present invention is to provide a regenerable self-cleaning ductless fume hood to solve the problems raised in the above background technology.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A regenerable self-cleaning ductless fume hood, comprising: a cabinet body and a cleaning mechanism, air inlet holes are opened on both sides of the cabinet body, a filter is fixedly installed in the air inlet hole, a fan is arranged on the top of the cabinet body, the fan comprises a wind tube, a fan blade and a driving motor, the driving motor is fixedly installed in the wind tube, and the fan blade is fixedly connected to the output shaft of the driving motor;

[0007] A linkage mechanism is arranged inside the air duct, and the linkage mechanism includes a linkage blade and two transverse shafts. A linkage shaft is fixedly installed inside the linkage blade, and a driving bevel gear is fixedly connected to the linkage shaft. The ends of the two transverse shafts close to each other are fixedly connected to driven bevel gears, and the two driven bevel gears are meshed with the driving bevel gear. The other ends of the two transverse shafts are respectively provided with an adjustment mechanism and a transmission mechanism.

[0008] The adjusting mechanism includes a rotating frame, a linkage plate and a vertical plate. The rotating frame is fixedly connected to one end of one of the horizontal axes, and the outer side of the rotating frame is slidably sleeved with two connecting frames, one side of the connecting frame is hinged with two rotating wheels, one side of the linkage plate is provided with two arc grooves, the two rotating wheels are movably abutted in the corresponding arc grooves, and the other side of the linkage plate is fixedly connected to a step plate, one side of the vertical plate is fixedly connected to a pressure sensor, the other end of the pressure sensor is fixedly connected to a connecting column, and the connecting column is rotatably connected to the inside of the step plate.

[0009] Preferably, the cleaning mechanism includes two mounting shafts, which are rotatably connected in the cabinet, and a driving arm and a plurality of rotating arms are fixedly sleeved on the outer side of the mounting shaft, and an impact plate is fixedly connected to the other end of the rotating arm, and a first iron sheet is fixedly installed on the front side of the driving arm, and two first electromagnets are fixedly installed on the front side of the cabinet, the two first electromagnets are magnetically attracted to the corresponding first iron sheets, and a compression spring is fixedly connected between the first electromagnet and the corresponding first iron sheet.

[0010] Preferably, a movable track and a support plate are fixedly installed on the front side of the cabinet, a sealing door is slidably installed on the outer side of the movable track, the bottom of the sealing door is movably abutted against the support plate, and a cleaning port is opened on the front side of the cabinet, and the sealing door is movably abutted against the front side of the cleaning port.

[0011] Preferably, the transmission mechanism includes a worm, a worm wheel, a mounting frame and a connecting shaft, the worm is fixedly connected to one end of another horizontal shaft, and the worm is meshed with the worm wheel, the inside of the worm wheel is fixedly connected to a vertical shaft, the outside of the vertical shaft is fixedly connected to an active friction wheel, the top of the vertical shaft is fixedly connected to a rotating conductive sheet, the top of the cabinet is fixedly connected to two arc-shaped conductive sheets, the two arc-shaped conductive sheets are movably abutted against two sides of the rotating conductive sheet, and the top of the arc-shaped conductive sheet is fixedly connected to a conductive column, and the vertical shaft is rotatably connected to the top inner wall of the cabinet;

[0012] A slide groove is provided at the bottom of the cabinet, the installation frame is slidably connected in the slide groove, and an ear plate is fixedly connected to the bottom of the installation frame, a plurality of guide columns are fixedly connected to the side wall of the slide groove, and the ear plate is slidably sleeved on the outer sides of the plurality of guide columns, so as to guide the installation frame to move horizontally, and a return spring is fixedly connected to the other end of the guide column, and the other end of the return spring is fixedly connected to the ear plate;

[0013] The connecting shaft is rotatably connected to one side of the bottom of the installation frame, and the outer bottom end of the connecting shaft is fixedly connected to a driven friction wheel, the active friction wheel is adapted to the driven friction wheel, and the top end of the connecting shaft is fixedly connected to a winding wheel;

[0014] A slide plate is slidably installed in the installation frame, a touch panel, a reset spring and a connecting rope are fixedly connected to one side of the slide plate, the other end of the connecting shaft is fixedly connected to the outside of the winding wheel, and the other end of the reset spring is fixedly connected to the inner wall of one side of the installation frame, two limit rods are fixedly installed in the installation frame, the slide plate is slidably sleeved on the outside of the two limit rods, and the tops of the two limit rods are fixedly connected to the same touch button, and the touch panel is adapted to the touch button;

[0015] A second iron sheet is fixedly connected to one side of the installation frame, and a second electromagnet is fixedly connected to the inner wall of the other side of the slide groove. The second electromagnet is magnetically matched with the second iron sheet.

[0016] Preferably, the adjustment mechanism further comprises a mounting plate and a transverse plate, the mounting plate is fixedly connected to the top inner wall of the cabinet, a sliding hole is provided on one side of the mounting plate, the transverse plate is slidably connected in the sliding hole, and a second conductive sheet is fixedly installed on the top inner wall of the sliding hole, a first conductive sheet is fixedly connected to the top of the transverse plate, the first conductive sheet movably abuts against the second conductive sheet, the other side of the vertical plate is fixedly connected to the transverse plate, and two transverse springs are fixedly connected to the other side of the vertical plate, a groove is provided on the top inner wall of the cabinet, the vertical plate is slidably connected in the groove, and the other ends of the two transverse springs are fixedly connected to the side walls of the groove;

[0017] Two fixing rods are fixedly connected to one side of the rotating frame, and the other ends of the two fixing rods are fixedly connected to the same square plate. A square groove is opened on the right side of the linkage plate, and the square plate is slidably connected in the square groove. A connecting spring is fixedly connected to one side of the square plate, and the other end of the connecting spring is fixedly connected to the side wall of the square groove, so as to reset the linkage plate.

[0018] A counterweight plate is fixedly connected to the other side of the connection frame, and vertical springs are fixedly connected to the sides of the two counterweight plates away from each other. The other ends of the two vertical springs are fixedly connected to the rotating frame, thereby positioning the counterweight plate at its initial position.

[0019] Preferably, a controller is fixedly installed on the front side of the cabinet, an alarm is fixedly installed on the top of the controller, and a battery is provided on one side of the cabinet;

[0020] It should be noted that the circuit connection of the battery is as follows: the positive electrode of the battery is electrically connected to the first conductive sheet, the second conductive sheet is electrically connected to one end of the second electromagnet and one of the conductive posts, the other conductive post is electrically connected to one end of the first electromagnet, and the other end of the first electromagnet and the other end of the second electromagnet are both electrically connected to the negative electrode of the battery;

[0021] The controller is electrically connected to the alarm, touch button, pressure sensor and drive motor. When the touch button is pressed, the alarm is activated through the controller, and the controller controls the power of the drive motor to increase according to the pressure reduction monitored by the pressure sensor.

[0022] Preferably, a protective net is fixedly installed on the top of the wind duct, and a mounting frame is fixedly installed inside the wind duct, the drive motor is fixedly installed on the top of the mounting frame, and a mounting cylinder is fixedly installed on the bottom of the mounting frame, and the horizontal axis and the linkage axis are both rotatably connected in the mounting cylinder.

[0023] An activated carbon adsorption net is fixedly installed at the bottom of the air duct, and a vibrator is fixedly installed at the top of the bottom of the activated carbon adsorption net. The vibrator is connected to the controller signal, and when the touch button is pressed, the vibrator is started by controlling the controller.

[0024] The beneficial effects of the present invention are:

[0025] 1. In the present invention, the regenerable self-cleaning ductless fume hood drives the fan blades to rotate by starting the driving motor, thereby discharging the air in the cabinet upward, filtering the particulate matter in the air through the filter net, and the activated carbon adsorption net filters the particulate matter and adsorbs the harmful gas;

[0026] 2. In the present invention, the renewable self-cleaning ductless fume hood described above drives the linkage blades to rotate by wind force during the ventilation process of the air duct, and drives the linkage shaft to rotate. The linkage shaft drives the two transverse shafts to rotate through the meshing of the active bevel gear and the two driven bevel gears. One of the transverse shafts drives the rotating frame to rotate. During the rotation process, the rotating frame drives the two connecting frames and the two counterweight plates to perform circular motion. The two counterweight plates move away from each other under the action of centrifugal force, and drive the two rotating wheels to move away from each other. The two rotating wheels push the linkage plate to move rightward by abutting against the arc groove, and compress the connecting spring. At the same time, the linkage plate drives the pressure sensor through the cooperation of the step plate and the connecting column. The vertical plate moves to the right and compresses the transverse spring. The vertical plate drives the first conductive sheet to move to the right through the transverse plate, so that it is out of contact with the second conductive sheet. At the same time, the pressure on the vertical plate is monitored by the pressure sensor. When the dust in the cabinet increases and the ventilation volume decreases, the rotation speed of the linkage blades will decrease, thereby reducing the rotation speed of the rotating frame, and the centrifugal force obtained by the circular axis movement of the counterweight plate will decrease, thereby reducing the pressure on the vertical plate and the compression of the transverse spring, thereby reducing the pressure value monitored by the pressure sensor, thereby increasing the power of the drive motor through the controller, thereby increasing the rotation speed of the fan blades to increase the ventilation volume;

[0027] 3. In the present invention, in the renewable self-cleaning ductless fume hood, as dust accumulates in the cabinet, the fan blade speed continues to increase and can no longer maintain the ventilation volume of the cabinet, so that the ventilation volume decreases with the accumulation of dust. When the ventilation volume is small enough, the horizontal plate and the vertical plate are reset under the action of the horizontal spring, so that the first conductive sheet contacts the second conductive sheet, and at the same time, the horizontal axis drives the vertical axis to rotate slowly through the engagement of the worm and the worm gear, and the vertical axis drives the rotating conductive sheet to rotate. The rotating conductive sheet intermittently contacts the two arc-shaped conductive sheets during the rotation. When the rotating conductive sheet contacts the two arc-shaped conductive sheets, the first electromagnet is energized to magnetically attract the two first iron sheets, so as to drive the drive arm and the mounting shaft to rotate and press the compression spring. The first electromagnet is compressed and driven to perform circular motion through the rotating arm. When the rotating conductive sheet is out of contact with the two arc-shaped conductive sheets, the first electromagnet is powered off and powered on to release the magnetic attraction of the two first iron sheets. The two first iron sheets rotate in the opposite direction under the action of the compression spring, thereby driving the impact plate to perform reverse motion, so that the impact plate can impact the filter screen under the action of inertia, thereby shaking off the dust inside the filter screen. The intermittent power on and power off of the first electromagnet can realize automatic impact cleaning of the filter screen to avoid dust clogging. As the dust on the filter screen is shaken off, the ventilation volume in the cabinet will increase, so that the horizontal plate moves to the right and causes the first conductive sheet to be out of contact with the second conductive sheet, thereby ending the cleaning work.

[0028] 4. In the present invention, in the renewable self-cleaning ductless fume hood, when the evaporator inside the cabinet is clogged with dust, the dust on the filter screen is shaken off, and the ventilation volume in the cabinet is still small, so that the first conductive sheet and the second conductive sheet are in continuous contact, and the second electromagnet is energized, thereby magnetically attracting the second iron sheet, and driving the mounting frame, the connecting shaft and the driven friction wheel to move rightward, so that the driven friction wheel is in contact with the active friction wheel, and the vertical shaft drives the connecting shaft to rotate through the contact between the active friction wheel and the driven friction wheel while rotating, and drives the winding wheel to rotate synchronously, and the winding wheel reels the connecting rope while rotating and drives the slide plate to move rightward, and when the touch panel contacts the touch button, the control alarm is started and the vibrator is started, so that the activated carbon adsorption net is driven to vibrate through the vibrator to shake off the dust, and the alarm is sounded through the alarm to prompt the user to clean the inside of the cabinet;

[0029] 5. In the present invention, the regenerative self-cleaning ductless fume hood can adjust the fan power according to the ventilation volume in the fume hood through the provided regulating mechanism, so that the ventilation volume is dynamically balanced to ensure the heat exchange effect, and can realize automatic cleaning and alarm when there is too much dust in the fume hood through the provided linkage mechanism and cleaning mechanism, thereby avoiding continuous accumulation of dust affecting the operating stability of the fume hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1A schematic diagram of the three-dimensional structure of a regenerable self-cleaning ductless fume hood proposed by the present invention;

[0031] Figure 2 A schematic cross-sectional view of a regenerable self-cleaning ductless fume hood proposed by the present invention;

[0032] Figure 3 for Figure 2 Schematic diagram of the local structure in;

[0033] Figure 4 for Figure 3 A partial enlarged view of part A;

[0034] Figure 5 for Figure 3 A partial enlarged view of part B;

[0035] Figure 6 for Figure 3 A partial enlarged view of part C in the middle;

[0036] Figure 7 for Figure 6 A partial enlarged view of part D in the middle;

[0037] Figure 8 This is a schematic diagram of the three-dimensional structure of the cleaning mechanism proposed by the present invention.

[0038] In the figure: 1, cabinet; 101, sealing door; 102, support plate; 103, moving track; 104, filter screen; 2, air cylinder; 201, protective net; 202, activated carbon adsorption net; 203, mounting frame; 204, mounting cylinder; 3, mounting shaft; 301, rotating arm; 302, impact plate; 303, driving arm; 304, first iron sheet; 305, compression spring; 306, first electromagnet; 4, driving motor; 401, fan blade; 5, linkage shaft; 501, active bevel gear; 502, driven bevel gear; 503, horizontal shaft; 504, linkage blade; 6, rotating frame; 601, connecting frame; 602, rotating wheel; 603, connecting spring; 604, step plate; 605, connecting column; 606, horizontal plate; 607, mounting plate; 608, first conductive sheet; 60 9. Second conductive sheet; 610. Transverse spring; 611. Vertical plate; 612. Linkage plate; 613. Fixed rod; 614. Counterweight plate; 615. Vertical spring; 616. Square plate; 617. Pressure sensor; 7. Worm; 701. Worm wheel; 702. Vertical shaft; 703. Active friction wheel; 704. Rotating conductive sheet; 705. Arc-shaped conductive sheet; 8. Mounting frame; 801. Second iron sheet; 802. Second electromagnet; 803. Ear plate; 804. Return spring; 805. Guide column; 9. Connecting shaft; 901. Driven friction wheel; 902. Winding wheel; 903. Connecting rope; 904. Slide plate; 905. Touch panel; 906. Return spring; 907. Touch button; 10. Controller; 11. Alarm; 12. Battery; 13. Vibrator. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0040] Reference Figure 1 - Figure 8 A regenerable self-cleaning ductless fume hood, comprising: a cabinet 1 and a cleaning mechanism, air inlets are provided on both sides of the cabinet 1, a filter 104 is fixedly installed in the air inlet, a fan is provided on the top of the cabinet 1, the fan comprises a wind tube 2, a fan blade 401 and a driving motor 4, the driving motor 4 is fixedly installed in the wind tube 2, and the fan blade 401 is fixedly connected to the output shaft of the driving motor 4;

[0041] A linkage mechanism is arranged inside the air cylinder 2, and the linkage mechanism includes a linkage blade 504 and two transverse shafts 503. A linkage shaft 5 is fixedly installed inside the linkage blade 504, and a driving bevel gear 501 is fixedly connected to the linkage shaft 5. One end of the two transverse shafts 503 close to each other is fixedly connected to a driven bevel gear 502, and the two driven bevel gears 502 are meshed with the driving bevel gear 501. The other ends of the two transverse shafts 503 are respectively provided with an adjustment mechanism and a transmission mechanism.

[0042] The adjusting mechanism includes a rotating frame 6, a linkage plate 612 and a vertical plate 611. The rotating frame 6 is fixedly connected to one end of one of the horizontal axes 503, and two connecting frames 601 are slidably sleeved on the outer side of the rotating frame 6. Two rotating wheels 602 are hinged on one side of the connecting frame 601. Two arc grooves are provided on one side of the linkage plate 612. The two rotating wheels 602 are respectively movably abutted in the corresponding arc grooves, and the other side of the linkage plate 612 is fixedly connected to a step plate 604. One side of the vertical plate 611 is fixedly connected to a pressure sensor 617. The other end of the pressure sensor 617 is fixedly connected to a connecting column 605. The connecting column 605 is rotatably connected to the inside of the step plate 604.

[0043] In this embodiment, the cleaning mechanism includes two mounting shafts 3, which are rotatably connected in the cabinet 1, and a driving arm 303 and a plurality of rotating arms 301 are fixedly sleeved on the outer side of the mounting shaft 3, and the other end of the rotating arm 301 is fixedly connected to a collision plate 302, and a first iron sheet 304 is fixedly installed on the front side of the driving arm 303, and two first electromagnets 306 are fixedly installed on the front side of the cabinet 1, and the two first electromagnets 306 are magnetically attracted to the corresponding first iron sheets 304, and a compression spring 305 is fixedly connected between the first electromagnet 306 and the corresponding first iron sheet 304.

[0044] In this embodiment, a movable track 103 and a support plate 102 are fixedly installed on the front side of the cabinet 1, and a sealing door 101 is slidably installed on the outer side of the movable track 103. The bottom of the sealing door 101 is movably abutted against the support plate 102, and a cleaning port is opened on the front side of the cabinet 1, and the sealing door 101 is movably abutted against the front side of the cleaning port.

[0045] In this embodiment, the transmission mechanism includes a worm 7, a worm wheel 701, a mounting frame 8 and a connecting shaft 9. The worm 7 is fixedly connected to one end of another horizontal axis 503, and the worm 7 is meshed with the worm wheel 701. The inside of the worm wheel 701 is fixedly connected to a vertical axis 702, the outside of the vertical axis 702 is fixedly connected to an active friction wheel 703, the top of the vertical axis 702 is fixedly connected to a rotating conductive sheet 704, and the top of the cabinet 1 is fixedly connected to two arc-shaped conductive sheets 705, which are movably abutted against the two sides of the rotating conductive sheet 704, and the top of the arc-shaped conductive sheet 705 is fixedly connected to a conductive column, and the vertical axis 702 is rotatably connected to the top inner wall of the cabinet 1;

[0046] A slide groove is provided at the bottom of the cabinet 1, and the installation frame 8 is slidably connected in the slide groove, and an ear plate 803 is fixedly connected to the bottom of the installation frame 8, and a plurality of guide columns 805 are fixedly connected to the side wall of the slide groove, and the ear plate 803 is slidably sleeved on the outer sides of the plurality of guide columns 805, so as to guide the installation frame 8 to move horizontally, and a return spring 804 is fixedly connected to the other end of the guide column 805, and the other end of the return spring 804 is fixedly connected to the ear plate 803;

[0047] The connecting shaft 9 is rotatably connected to one side of the bottom of the mounting frame 8, and a driven friction wheel 901 is fixedly connected to the outer bottom end of the connecting shaft 9, the active friction wheel 703 is adapted to the driven friction wheel 901, and a winding wheel 902 is fixedly connected to the top end of the connecting shaft 9;

[0048] A slide plate 904 is slidably installed in the installation frame 8, and a touch panel 905, a reset spring 906 and a connecting rope 903 are fixedly connected to one side of the slide plate 904. The other end of the connecting shaft 9 is fixedly connected to the outside of the winding wheel 902, and the other end of the reset spring 906 is fixedly connected to the inner wall of one side of the installation frame 8. Two limit rods are fixedly installed in the installation frame 8, and the slide plate 904 is slidably sleeved on the outside of the two limit rods. The tops of the two limit rods are fixedly connected with the same touch button 907, and the touch panel 905 is adapted to the touch button 907.

[0049] A second iron sheet 801 is fixedly connected to one side of the mounting frame 8 , and a second electromagnet 802 is fixedly connected to the inner wall of the other side of the slide slot. The second electromagnet 802 cooperates with the second iron sheet 801 by magnetic attraction.

[0050] In this embodiment, the adjustment mechanism also includes a mounting plate 607 and a horizontal plate 606. The mounting plate 607 is fixedly connected to the top inner wall of the cabinet 1. A sliding hole is provided on one side of the mounting plate 607. The horizontal plate 606 is slidably connected in the sliding hole. A second conductive sheet 609 is fixedly installed on the top inner wall of the sliding hole. A first conductive sheet 608 is fixedly connected to the top of the horizontal plate 606. The first conductive sheet 608 is movably abutted against the second conductive sheet 609. The other side of the vertical plate 611 is fixedly connected to the horizontal plate 606. Two transverse springs 610 are fixedly connected to the other side of the vertical plate 611. A groove is provided on the top inner wall of the cabinet 1. The vertical plate 611 is slidably connected in the groove. The other ends of the two transverse springs 610 are fixedly connected to the side walls of the groove.

[0051] Two fixing rods 613 are fixedly connected to one side of the rotating frame 6, and the other ends of the two fixing rods 613 are fixedly connected to the same square plate 616. A square groove is provided on the right side of the linkage plate 612, and the square plate 616 is slidably connected in the square groove. A connecting spring 603 is fixedly connected to one side of the square plate 616, and the other end of the connecting spring 603 is fixedly connected to the side wall of the square groove, so as to reset the linkage plate 612.

[0052] A counterweight plate 614 is fixedly connected to the other side of the connecting frame 601. The two counterweight plates 614 are fixedly connected to the sides away from each other with vertical springs 615. The other ends of the two vertical springs 615 are fixedly connected to the rotating frame 6, thereby positioning the counterweight plates 614 at the initial position.

[0053] In this embodiment, a controller 10 is fixedly installed on the front side of the cabinet 1, an alarm 11 is fixedly installed on the top of the controller 10, and a battery 12 is provided on one side of the cabinet 1;

[0054] It should be noted that the circuit connection of the battery 12 is as follows: the positive electrode of the battery 12 is electrically connected to the first conductive sheet 608, the second conductive sheet 609 is electrically connected to one end of the second electromagnet 802 and one of the conductive posts, the other conductive post is electrically connected to one end of the first electromagnet 306, and the other end of the first electromagnet 306 and the other end of the second electromagnet 802 are both electrically connected to the negative electrode of the battery 12;

[0055] The controller 10 is electrically connected to the alarm 11, the touch button 907, the pressure sensor 617 and the drive motor 4. When the touch button 907 is pressed, the alarm 11 is activated through the controller 10, and the controller 10 controls the power increase of the drive motor 4 according to the pressure reduction monitored by the pressure sensor 617.

[0056] In this embodiment, a protective net 201 is fixedly installed on the top of the wind duct 2, and a mounting frame 203 is fixedly installed inside the wind duct 2, the drive motor 4 is fixedly installed on the top of the mounting frame 203, and a mounting cylinder 204 is fixedly installed on the bottom of the mounting frame 203, and the horizontal axis 503 and the linkage axis 5 are both rotatably connected in the mounting cylinder 204.

[0057] An activated carbon adsorption net 202 is fixedly installed at the bottom of the air duct 2, and a vibrator 13 is fixedly installed at the top of the bottom of the activated carbon adsorption net 202. The vibrator 13 is connected to the controller 10 by signal. When the touch button 907 is pressed, the vibrator 13 is controlled by the controller 10 to start.

[0058] In this embodiment, when in use, the fan blades 401 are driven to rotate by starting the driving motor 4, so that the air in the cabinet 1 is discharged upward, the particulate matter in the air is filtered through the filter 104, and the activated carbon adsorption net 202 filters the particulate matter and adsorbs harmful gases;

[0059] During the ventilation process of the wind tube 2, the wind force drives the linkage blade 504 to rotate, and drives the linkage shaft 5 to rotate. The linkage shaft 5 drives the two transverse shafts 503 to rotate through the meshing of the active bevel gear 501 and the two driven bevel gears 502. One of the transverse shafts 503 drives the rotating frame 6 to rotate. During the rotation process, the rotating frame 6 drives the two connecting frames 601 and the two counterweight plates 614 to perform circular motion. The two counterweight plates 614 move away from each other under the action of centrifugal force, and drive the two wheels 602 to move away from each other. The two wheels 602 push the linkage plate 612 to move rightward by abutting against the arc groove, and compress the connecting spring 603. At the same time, the linkage plate 612 drives the pressure sensor 617 and the vertical plate 611 to move rightward through the cooperation of the step plate 604 and the connecting column 605. The vertical plate 611 drives the first conductive sheet 608 to move rightward through the horizontal plate 606, so that it is out of contact with the second conductive sheet 609. At the same time, the pressure on the vertical plate 611 is monitored by the pressure sensor 617. When the dust in the cabinet 1 increases and the ventilation volume decreases, the rotation speed of the linkage blade 504 is reduced, thereby reducing the rotation speed of the rotating frame 6, and the centrifugal force obtained by the circular axis movement of the counterweight plate 614 is reduced, thereby reducing the pressure on the vertical plate 611 and the compression of the horizontal spring 610, thereby reducing the pressure value monitored by the pressure sensor 617, thereby controlling the power of the drive motor 4 to increase through the controller 10, thereby increasing the rotation speed of the fan blade 401 to increase the ventilation volume;

[0060] As dust accumulates in the cabinet 1, the rotation speed of the fan blade 401 continues to increase and can no longer maintain the ventilation volume of the cabinet 1, so that the ventilation volume decreases with the accumulation of dust. When the ventilation volume is small enough, the horizontal plate 606 and the vertical plate 611 are reset under the action of the horizontal spring 610, so that the first conductive sheet 608 contacts the second conductive sheet 609, so that the horizontal axis 503 drives the vertical axis 702 to rotate slowly through the engagement of the worm 7 and the worm gear 701, and the vertical axis 702 drives the rotating conductive sheet 704 to rotate. The rotating conductive sheet 704 intermittently contacts the two arc-shaped conductive sheets 705 during the rotation. When the rotating conductive sheet 704 contacts the two arc-shaped conductive sheets 705, the first electromagnet 306 is energized to magnetically attract the two first iron sheets 304, so as to drive the drive arm 303 and the mounting shaft 3 to rotate, compress the compression spring 305, and rotate The movable arm 301 drives the two impact plates 302 to perform circular motion. When the rotating conductive sheet 704 is out of contact with the two arc-shaped conductive sheets 705, the first electromagnet 306 is powered on and off to release the magnetic attraction of the two first iron sheets 304. The two first iron sheets 304 rotate in the opposite direction under the action of the compression spring 305, thereby driving the impact plate 302 to perform reverse motion, so that the impact plate 302 can impact the filter screen 104 under the action of inertia, thereby shaking off the dust inside it, thereby realizing automatic impact cleaning of the filter screen 104 through intermittent power on and power off of the first electromagnet 306 to avoid dust clogging. As the dust on the filter screen 104 is shaken off, the ventilation volume in the cabinet 1 will increase, so that the horizontal plate 606 moves to the right, and the first conductive sheet 608 is out of contact with the second conductive sheet 609, thereby ending the cleaning work;

[0061] When the evaporator inside the cabinet 1 is clogged with dust, the dust on the filter 104 is shaken off, and the ventilation volume in the cabinet 1 is still small, so that the first conductive sheet 608 is in continuous contact with the second conductive sheet 609, and the second electromagnet 802 is energized, thereby magnetically attracting the second iron sheet 801, and driving the mounting frame 8, the connecting shaft 9 and the driven friction wheel 901 to move to the right, so that the driven friction wheel 901 is in contact with the active friction wheel 703, and the vertical shaft 702 rotates while passing through the active friction wheel 703. The contact with the driven friction wheel 901 drives the connecting shaft 9 to rotate, and drives the winding wheel 902 to rotate synchronously. While rotating, the winding wheel 902 winds up the connecting rope 903 and drives the slide plate 904 to move to the right. When the touch panel 905 contacts the touch button 907, the control alarm 11 and the vibrator 13 are started, thereby driving the activated carbon adsorption net 202 to vibrate through the vibrator 13 to shake off the dust, and an alarm is sounded through the alarm 11 to prompt the user to clean the inside of the cabinet 1.

[0062] The above is a detailed introduction to a regenerable self-cleaning ductless fume hood provided by the present invention. Specific embodiments are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A regenerable self-cleaning ductless fume hood, characterized in that: include: A cabinet (1) and a cleaning mechanism, wherein air inlet holes are provided on both sides of the cabinet (1), and a filter screen (104) is fixedly installed in the air inlet hole; a fan is provided on the top of the cabinet (1), and the fan comprises an air cylinder (2), a fan blade (401) and a drive motor (4); the drive motor (4) is fixedly installed in the air cylinder (2), and the fan blade (401) is fixedly connected to the output shaft of the drive motor (4); The wind tube (2) is provided with a linkage mechanism inside, the linkage mechanism comprising a linkage blade (504) and two transverse shafts (503), a linkage shaft (5) is fixedly installed inside the linkage blade (504), a driving bevel gear (501) is fixedly connected to the linkage shaft (5), one end of the two transverse shafts (503) close to each other is fixedly connected to a driven bevel gear (502), the two driven bevel gears (502) are meshed with the driving bevel gear (501), and the other ends of the two transverse shafts (503) are respectively provided with an adjustment mechanism and a transmission mechanism; The adjustment mechanism comprises a rotating frame (6), a linkage plate (612) and a vertical plate (611); the rotating frame (6) is fixedly connected to one end of one of the transverse axes (503); two connecting frames (601) are slidably sleeved on the outer side of the rotating frame (6); two rotating wheels (602) are hinged on one side of the connecting frame (601); two arc grooves are formed on one side of the linkage plate (612); the two rotating wheels (602) are movably abutted in the corresponding arc grooves; a step plate (604) is fixedly connected to the other side of the linkage plate (612); and the vertical plate (611) is fixedly connected to the other side of the linkage plate (612). ) is fixedly connected to one side of the cabinet (1), the other end of the pressure sensor (617) is fixedly connected to a connecting column (605), the connecting column (605) is rotatably connected to the inside of the step plate (604), the cleaning mechanism comprises two mounting shafts (3), the mounting shafts (3) are rotatably connected to the cabinet (1), and the outer sides of the mounting shafts (3) are fixedly sleeved with a driving arm (303) and a plurality of rotating arms (301), the other ends of the rotating arms (301) are fixedly connected to an impact plate (302), and the front sides of the driving arms (303) are fixedly mounted with a plurality of rotating arms (301). A first iron sheet (304) is installed, and two first electromagnets (306) are fixedly installed on the front side of the cabinet (1), the two first electromagnets (306) are magnetically matched with the corresponding first iron sheets (304), and a compression spring (305) is fixedly connected between the first electromagnets (306) and the corresponding first iron sheets (304), and the transmission mechanism comprises a worm (7), a worm wheel (701), a mounting frame (8) and a connecting shaft (9), the worm (7) is fixedly connected to one end of another horizontal shaft (503), and the worm (7) and the worm wheel (701) are meshed. The worm wheel (701) is fixedly connected to a vertical shaft (702) inside, an active friction wheel (703) is fixedly connected to the outside of the vertical shaft (702), a rotating conductive sheet (704) is fixedly connected to the top of the vertical shaft (702), two arc-shaped conductive sheets (705) are fixedly connected to the top of the cabinet (1), the two arc-shaped conductive sheets (705) are movably abutted against two sides of the rotating conductive sheet (704), and a conductive column is fixedly connected to the top of the arc-shaped conductive sheet (705), and the vertical shaft (702) is rotatably connected to the inner wall of the top of the cabinet (1); The cabinet (1) has a slide groove at the bottom, the installation frame (8) is slidably connected in the slide groove, and the bottom of the installation frame (8) is fixedly connected with an ear plate (803), and the side wall of the slide groove is fixedly connected with a plurality of guide columns (805), and the ear plate (803) is slidably sleeved on the outer sides of the plurality of guide columns (805), so as to guide the installation frame (8) to move horizontally, and the other end of the guide column (805) is fixedly connected with a return spring (804), and the other end of the return spring (804) is fixedly connected to the ear plate (803); The connecting shaft (9) is rotatably connected to one side of the bottom of the mounting frame (8), and a driven friction wheel (901) is fixedly connected to the outer bottom end of the connecting shaft (9), the driving friction wheel (703) is matched with the driven friction wheel (901), and a winding wheel (902) is fixedly connected to the top end of the connecting shaft (9); A slide plate (904) is slidably mounted in the installation frame (8); a touch panel (905), a return spring (906) and a connecting rope (903) are fixedly connected to one side of the slide plate (904); the other end of the connecting shaft (9) is fixedly connected to the outside of the winding wheel (902); and the other end of the return spring (906) is fixedly connected to an inner wall of one side of the installation frame (8); two limit rods are fixedly mounted in the installation frame (8); the slide plate (904) is slidably sleeved on the outside of the two limit rods; and the tops of the two limit rods are fixedly connected to the same touch button (907); and the touch panel (905) is compatible with the touch button (907); A second iron sheet (801) is fixedly connected to one side of the installation frame (8), and a second electromagnet (802) is fixedly connected to the inner wall of the other side of the slide groove, and the second electromagnet (802) and the second iron sheet (801) are magnetically matched.

2. A regenerable self-cleaning ductless fume hood according to claim 1, characterized in that: A movable track (103) and a support plate (102) are fixedly mounted on the front side of the cabinet body (1); a sealing door (101) is slidably mounted on the outer side of the movable track (103); the bottom of the sealing door (101) is movably abutted against the support plate (102); and a cleaning port is provided on the front side of the cabinet body (1), and the sealing door (101) is movably abutted against the front side of the cleaning port.

3. A regenerable self-cleaning ductless fume hood according to claim 1, characterized in that: The adjustment mechanism further comprises a mounting plate (607) and a horizontal plate (606); the mounting plate (607) is fixedly connected to the top inner wall of the cabinet (1); a sliding hole is provided on one side of the mounting plate (607); the horizontal plate (606) is slidably connected in the sliding hole; a second conductive sheet (609) is fixedly installed on the top inner wall of the sliding hole; a first conductive sheet (608) is fixedly connected to the top of the horizontal plate (606); the first conductive sheet (608) and the second conductive sheet (609) are movably abutted; the other side of the vertical plate (611) is fixedly connected to the horizontal plate (606); and two transverse springs (610) are fixedly connected to the other side of the vertical plate (611); a groove is provided on the top inner wall of the cabinet (1); the vertical plate (611) is slidably connected in the groove; and the other ends of the two transverse springs (610) are fixedly connected to the side wall of the groove; One side of the rotating frame (6) is fixedly connected to two fixing rods (613), the other ends of the two fixing rods (613) are fixedly connected to the same square plate (616), a square groove is provided on the right side of the linkage plate (612), the square plate (616) is slidably connected in the square groove, and one side of the square plate (616) is fixedly connected to a connecting spring (603), the other end of the connecting spring (603) is fixedly connected to the side wall of the square groove, so as to reset the linkage plate (612); A counterweight plate (614) is fixedly connected to the other side of the connection frame (601), and vertical springs (615) are fixedly connected to the sides of the two counterweight plates (614) that are away from each other, and the other ends of the two vertical springs (615) are fixedly connected to the rotating frame (6), so as to position the counterweight plates (614) at their initial positions.

4. A regenerable self-cleaning ductless fume hood according to claim 1, characterized in that: A controller (10) is fixedly mounted on the front side of the cabinet (1), an alarm (11) is fixedly mounted on the top of the controller (10), and a storage battery (12) is provided on one side of the cabinet (1); The positive electrode of the storage battery (12) is electrically connected to the first conductive sheet (608), the second conductive sheet (609) is electrically connected to one end of the second electromagnet (802) and one of the conductive posts, the other conductive post is electrically connected to one end of the first electromagnet (306), and the other end of the first electromagnet (306) and the other end of the second electromagnet (802) are both electrically connected to the negative electrode of the storage battery (12); The controller (10) is electrically connected to the alarm (11), the touch button (907), the pressure sensor (617) and the drive motor (4); when the touch button (907) is pressed, the alarm (11) is activated by the controller (10), and the controller (10) controls the power of the drive motor (4) to increase according to the amount of pressure reduction monitored by the pressure sensor (617).

5. The regenerable self-cleaning ductless fume hood according to claim 1, characterized in that: A protective net (201) is fixedly mounted on the top of the wind tube (2), and a mounting frame (203) is fixedly mounted inside the wind tube (2); a drive motor (4) is fixedly mounted on the top of the mounting frame (203), and a mounting cylinder (204) is fixedly mounted on the bottom of the mounting frame (203); the transverse axis (503) and the linkage axis (5) are both rotatably connected inside the mounting cylinder (204).

6. A regenerable self-cleaning ductless fume hood according to claim 1, characterized in that: An activated carbon adsorption net (202) is fixedly mounted on the bottom of the air cylinder (2), and a vibrator (13) is fixedly mounted on the top of the bottom of the activated carbon adsorption net (202). The vibrator (13) is connected to the controller (10) by signal, and when the touch button (907) is pressed, the vibrator (13) is started by the controller (10).

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