Integrated blower and vacuum self-cleaning ventilation device

Abstract

This utility model discloses a self-cleaning ventilation device integrating blowing and suction, comprising a frame installed at the ventilation opening, wherein: a filter screen is installed on the frame, and a blowing mechanism and a suction mechanism are respectively arranged inside and outside the filter screen; the blowing mechanism includes a blowing fan that blows air towards the filter screen, and the suction mechanism includes a suction hood that collects solid particles blown off the filter screen by the blowing fan; the blowing fan moves horizontally along an inner horizontal slide under the drive of a blowing motor, and the suction hood moves horizontally along an outer horizontal slide under the drive of a suction motor; the inner and outer horizontal slides move synchronously up and down along a vertical slide under the drive of a lifting transmission mechanism; the blowing fan and the suction hood are arranged opposite each other and move synchronously. This utility model can realize ventilation and air exchange between the inside and outside of a space, and has an automatic filter cleaning function, ensuring filtration effect, and is suitable for widespread application.

Description

Technical Field

[0001] This utility model relates to a ventilation and air exchange device, and more particularly to a self-cleaning ventilation device that integrates blowing and suction. Background Technology

[0002] Currently, indoor air quality is receiving increasing attention, especially in spaces located near environments that generate large amounts of dust, floating particles, and other solid particles. Considering the potential health risks of these particles entering the space, filtration devices are needed at ventilation openings (such as windows) to prevent them from entering. Existing filtration devices include screens installed on ventilation openings or fresh air systems. However, in practical use, screens and fresh air systems have the following drawbacks: While screens are effective at filtering dust and floating particles, they lack automatic cleaning functions and easily become clogged after prolonged use, significantly reducing their filtration efficiency and requiring frequent manual cleaning and maintenance. Fresh air systems enable air exchange between the inside and outside of the space, offering large-scale and effective purification, but their filters also lack automatic cleaning functions, resulting in high costs, time, and labor for manual cleaning and replacement. Utility Model Content

[0003] The purpose of this utility model is to provide a self-cleaning ventilation device that integrates blowing and vacuuming, which can realize ventilation and air exchange inside and outside the space, and has an automatic filter cleaning function, ensuring the filtration effect and making it suitable for widespread application.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A self-cleaning ventilation device integrating blowing and suction includes a frame installed at the ventilation opening, wherein: a filter screen is installed on the frame, and a blowing mechanism and a suction mechanism are respectively arranged inside and outside the filter screen; the blowing mechanism includes a blowing fan that blows air toward the filter screen, and the suction mechanism includes a suction hood that collects solid particles blown off the filter screen by the blowing fan; the blowing fan moves horizontally along an inner horizontal slide under the drive of a blowing motor, and the suction hood moves horizontally along an outer horizontal slide under the drive of a suction motor; the inner and outer horizontal slides move synchronously up and down along a vertical slide under the drive of a lifting transmission mechanism; the blowing fan and the suction hood are arranged opposite each other and move synchronously.

[0006] In actual design, the filter screen is a single-layer filter screen or a double-layer filter screen, wherein: the double-layer filter screen includes an outer filter screen and an inner filter screen, the outer filter screen includes an outer frame, and the outer frame is embedded with a hydrophobic sponge filter screen that blocks large solid particles such as cotton wool and willow catkins as well as moisture in the air, the inner filter screen includes an inner frame, and the inner frame is embedded with a composite antistatic sponge filter screen that blocks small solid particles as well as moisture in the air.

[0007] In the actual design, the dust blowing mechanism includes a dust blowing fan that can be slidably mounted on the horizontal inner slide via an inner slider. The dust blowing motor is installed under one end of the horizontal inner slide. The dust blowing motor drives the dust blowing fan to move horizontally on the horizontal inner slide via an inner horizontal transmission mechanism. Trigger sensors for detecting whether the dust blowing fan has moved into position are installed at both ends of the horizontal inner slide.

[0008] Furthermore, the inner slider is equipped with a stop block for abutting against the filter screen.

[0009] In the actual design, the dust collection mechanism includes a dust collection hood that is slidably mounted on the horizontal outer slide rail via an outer slider. A dust collection motor is installed under one end of the horizontal outer slide rail. The dust collection motor drives the dust collection hood to move horizontally on the horizontal outer slide rail via an outer horizontal transmission mechanism. Trigger sensors for detecting whether the dust collection hood has moved into position are installed at both ends of the horizontal outer slide rail. The dust outlet of the dust collection hood is connected to the dust collection interface on the dust collection fixed pipe located at one end of the frame via a dust collection pipe. The outlet of the dust collection fixed pipe is connected to the inlet of the dust collection fan. The outlet of the dust collection fan is connected to the discharge pipe via a one-way valve.

[0010] Furthermore, the dust inlet of the dust hood is provided with a ring of brushes, which abut against the outer surface of the filter screen.

[0011] Furthermore, the dust outlet of the dust hood is equipped with a bearing, which is connected to the inlet of the dust suction pipe via a connecting short pipe. The connecting short pipe can rotate relative to the dust hood by means of the bearing, and the outlet of the dust suction pipe is connected to the dust suction interface via a connecting short pipe.

[0012] In the actual design, the lifting transmission mechanism includes transmission components located at both ends of the filter screen. The transmission components include an inner transmission belt, an inner upper wheel, and an inner lower wheel located inside the filter screen, and an outer transmission belt, an outer upper wheel, and an outer lower wheel located outside the filter screen. The inner lower wheel located at the lower part of the frame is connected to the inner upper wheel located at the upper part of the frame via the inner transmission belt. The inner lower wheel is also connected to the outer lower wheel located at the lower part of the frame and the outer upper wheel located at the upper part of the frame via the outer transmission belt. The inner lower wheel is connected to a transmission shaft, and the transmission shaft is connected to the output shaft of the lifting drive motor via a reduction gearbox.

[0013] In the actual design, a vertical slide rail is installed at each end of the frame, on the inner and outer sides of the filter screen. Limit switches are installed at the top and bottom of each vertical slide rail. Specifically, the two vertical slide rails located on the inner side of the filter screen are each connected to both ends of the horizontal inner slide rail via an inner lifting member, and each inner lifting member is connected to the inner drive belt at the same end of the frame. The two vertical slide rails located on the outer side of the filter screen are each connected to both ends of the horizontal outer slide rail via an outer lifting member, and each outer lifting member is connected to the outer drive belt at the same end of the frame.

[0014] In the actual design, the inner upper wheel and the outer upper wheel are connected to the frame via a tensioning mechanism.

[0015] The advantages of this utility model are:

[0016] 1. In addition to enabling ventilation and air exchange between the inside and outside of the space, this utility model also has an automatic filter cleaning function, which avoids filter clogging after long-term use, ensures the filtration effect, and greatly reduces the cost of filter cleaning and maintenance.

[0017] 2. The double-layer filter of this utility model can meet the dual needs of intercepting large solid particles and filtering small solid particles, and has a good filtration effect.

[0018] 3. This utility model can perform comprehensive and reliable cleaning of the filter screen, with no blind spots, good cleaning effect, avoid filter screen clogging, extend service life, and eliminate the need for frequent manual cleaning and maintenance, saving time and effort. Furthermore, the cleaning process adopts a method of blowing and vacuuming in opposite directions and simultaneously, which ensures the cleaning effect while avoiding secondary pollution of the external environment by the solid particles that fall off during cleaning. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the self-cleaning ventilation device that integrates blowing and suction.

[0020] Figure 2 yes Figure 1 Rear view diagram.

[0021] Figure 3 yes Figure 1 A left-side view diagram.

[0022] Figure 4 This is a three-dimensional schematic diagram of the self-cleaning ventilation device that integrates blowing and suction.

[0023] Figure 5 This is a schematic diagram of the installation of the inner and outer drive belts located at the same end of the frame.

[0024] Figure 6 This is a schematic diagram of the tensioning mechanism.

[0025] Figure 7 Is it to be removed? Figure 1 A three-dimensional schematic diagram of the structure behind half of the filter screen (the vacuum motor is not shown).

[0026] Figure 8 yes Figure 7 An enlarged schematic diagram of part A.

[0027] Figure 9 From Figure 7 Looking to the right, here is an enlarged diagram of the vacuum hood. Detailed Implementation

[0028] like Figures 1 to 9 As shown, this utility model proposes a self-cleaning ventilation device integrating blowing and suction, including a frame 10 installed on a ventilation opening in a space, wherein: a filter screen 20 is installed on the frame 10, and a blowing mechanism and a suction mechanism are respectively arranged on the inner and outer sides of the filter screen 20; the blowing mechanism includes a blowing fan 31 that blows air toward the filter screen 20, and the suction mechanism includes a suction hood 51 that collects solid particles blown off the filter screen 20 by the blowing fan 31; the blowing fan 31 is driven by a blowing motor 32 to move horizontally along an inner slide rail 34, and the suction hood 51 is driven by a suction motor 59 to move horizontally along an outer slide rail 57; the inner slide rail 34 and the outer slide rail 57 move synchronously up and down along a vertical slide rail 60 under the drive of a lifting transmission mechanism; the blowing fan 31 and the suction hood 51 are arranged opposite each other and move synchronously (including synchronous horizontal movement and synchronous up and down movement).

[0029] In practical design, filter 20 can be a single-layer or double-layer filter. For single-layer filters, commonly available filters on the market are suitable. Double-layer filters include an outer filter and an inner filter. The outer filter consists of an outer frame with a hydrophobic sponge filter embedded in it to block large solid particles (≥1mm in diameter) such as lint and willow catkins, as well as moisture from the air. The hydrophobic sponge filter is made of hydrophobic sponge material, with a pore size of 10μm and a thickness of 20mm, achieving an interception rate of ≥95%. The inner filter consists of an inner frame with a composite antistatic sponge filter embedded in it to block small solid particles (such as dust) and moisture from the air. The composite antistatic sponge filter has a pore size of 1μm, and its thickness can be designed reasonably according to actual needs.

[0030] In this invention, the composite antistatic sponge filter is an existing filter, which is composed of a three-dimensional honeycomb mesh, a three-dimensional fiber hydrophobic layer, an activated carbon mesh, a glue-free nano-biochemical cotton, a fiber biochemical cotton, an antistatic coating, an antibacterial ion-plated film layer, and an electrospun nanofiber membrane layer stacked together. The three-dimensional honeycomb mesh is on the outermost side, and the electrospun nanofiber membrane layer is on the innermost side. The filtration process for fine solid particles and moisture in the air is as follows: three-dimensional honeycomb mesh (filters fine particles) → three-dimensional fiber hydrophobic layer (intercepts moisture) → activated carbon mesh (activated carbon adsorbs moisture) → glue-free nano-biochemical cotton (blocks microorganisms) → fiber biochemical cotton (secondary filtration of fine particles) → antistatic coating (eliminates electrostatic adsorption) → antibacterial ion-plated film layer (inhibits bacterial growth) → electrospun nanofiber membrane (intercepts nano-sized particles below PM1.0), ultimately outputting clean air.

[0031] During actual installation, the outer filter of the dual-layer filter faces outwards while the inner filter faces inwards. Based on this dual-layer design, large solid particles from outside the space are first intercepted by the outer filter, which also absorbs some moisture to prevent caking. Then, smaller solid particles are further filtered by the inner filter, which again absorbs moisture to prevent caking. In short, the dual-layer filter effectively intercepts and filters both large and small solid particles, allowing fresh air to ultimately enter the space through the dual-layer filter, resulting in excellent filtration.

[0032] In this invention, the frame 10 is designed as a rectangular body, consisting of side frames, a top frame, and a bottom frame. The frame 10 has grids for mounting the filter screen 20, typically located in the upper middle part of the frame 10. A baffle 40 is usually installed below the grids; that is, the filter screen 20 and the baffle 40 separate the frame 10 into an inner and outer side. Generally, a dust blowing mechanism is installed on the inner side, and a dust suction mechanism is installed on the outer side. Of course, the structure of the frame 10 is not limited to the above and can be designed reasonably according to requirements.

[0033] In the actual design, the top and bottom of the filter screen 20 are provided with slots (not shown in the figure) for inserting the clips on the frame 10 to increase stability after the filter screen 20 is installed. Furthermore, the bottom of the filter screen 20 can also be equipped with rollers (not shown in the figure) to facilitate the removal and replacement of the filter screen 20. The design of the rollers can effectively prevent the problem of the filter screen 20 being unable to be removed after rusting after long-term use.

[0034] like Figures 2 to 4The dust blowing mechanism includes a dust blowing fan 31 that can slide on a horizontal inner slide rail 34 via an inner slider 340. A dust blowing motor 32 is installed under one end of the horizontal inner slide rail 34. The dust blowing motor 32 drives the dust blowing fan 31 to move horizontally on the horizontal inner slide rail 34 via an inner horizontal transmission mechanism 33. Trigger sensors 80 are installed at both ends of the horizontal inner slide rail 34 to detect whether the dust blowing fan 31 has moved into position. When the trigger sensor 80 detects that the dust blowing fan 31 has moved into position, it causes the dust blowing motor 32 to rotate in the opposite direction so that the dust blowing fan 31 moves horizontally in the opposite direction. Thus, the dust blowing fan 31 can achieve horizontal reciprocating motion on the horizontal inner slide rail 34.

[0035] Furthermore, the inner horizontal transmission mechanism 33 includes a drive wheel connected to the output shaft of the dust blowing motor 32. The drive wheel is connected to the driven wheel via the inner horizontal transmission belt 331. The drive wheel and the driven wheel are located at opposite ends of the horizontal inner slide rail 34. The dust blowing fan 31 is connected to the inner horizontal transmission belt 331 via a connector (not shown in the figure). Then, the dust blowing motor 32 drives the drive wheel to rotate, and the drive wheel drives the driven wheel to rotate via the inner horizontal transmission belt 331. Thus, during the movement of the inner horizontal transmission belt 331, it drives the dust blowing fan 31 to move horizontally on the horizontal inner slide rail 34 via the connector.

[0036] like Figure 3 Preferably, an abutment block 35 is installed on the inner slider 340. The abutment block 35 is used to abut the filter screen 20 so that the filter screen 20 can fit more tightly with the suction port of the dust hood 51, thereby improving the dust collection effect.

[0037] In this invention, a tapered pressure-boosting nozzle is added to the air outlet of the dust blower 31 to reduce the air outlet area and increase the air outlet pressure, so as to generate a stable high-pressure airflow with an outlet air velocity of up to 35 m / s. The size of the nozzle is smaller than that of the dust collection hood 51, so that the dust blower 31 can blow away the solid particles attached to the deep pores of the filter screen 20 and blow them into the dust collection hood 51 to the maximum extent.

[0038] In actual design, the dust blower 31 can use various types of fans of appropriate types, such as high-pressure fans of 2000Pa and vortex fans. In addition, the dust blower 31 can also use compressed air to blow air to increase the airflow pressure.

[0039] like Figure 1 , Figure 3 , Figures 7 to 9The vacuuming mechanism includes a vacuum hood 51 slidably mounted on a horizontal outer slide rail 57 via an outer slider 570. A vacuum motor 59 is mounted below one end of the horizontal outer slide rail 57. The vacuum motor 59 drives the vacuum hood 51 to move horizontally on the horizontal outer slide rail 57 via an outer horizontal transmission mechanism 58. Trigger sensors 80 are installed at both ends of the horizontal outer slide rail 57 to detect whether the vacuum hood 51 has moved into position. When the trigger sensors 80 detect that the vacuum hood 51 has moved into position, they cause the vacuum motor 59 to reverse, thereby moving the vacuum hood 51... 1. Move in the opposite direction, so that the dust hood 51 can achieve horizontal reciprocating motion on the horizontal outer slide 57; the dust outlet of the dust hood 51 is connected to the dust interface 530 on the dust fixed pipe 53 located at one end of the frame 10 via the dust suction pipe 52; the outlet of the dust fixed pipe 53 is connected to the inlet of the dust suction fan 54; the outlet of the dust suction fan 54 is connected to the discharge pipe 56 via the one-way valve 55; the one-way valve 55 is used to prevent backflow of air and small animals from entering and exiting; the discharge pipe 56 is used to connect dust collection bags, etc. to collect solid particles.

[0040] In the actual design, the dust inlet of the dust hood 51 is rectangular, and its area is larger than the area of ​​the pressure-boosting nozzle installed on the air outlet of the dust blower 31. In this utility model, the dust blower 54 can be any type of suitable fan, such as a 2000Pa negative pressure fan.

[0041] Furthermore, the outer horizontal transmission mechanism 58 includes a drive wheel connected to the output shaft of the vacuum motor 59. The drive wheel is connected to the driven wheel via the outer horizontal transmission belt 581. The drive wheel and the driven wheel are located at opposite ends of the horizontal outer slide rail 57. The vacuum hood 51 is connected to the outer horizontal transmission belt 581 via a connector (not shown in the figure). Then, the vacuum motor 59 drives the drive wheel to rotate, and the drive wheel drives the driven wheel to rotate via the outer horizontal transmission belt 581. Thus, during the movement of the outer horizontal transmission belt 581, it drives the vacuum hood 51 to move horizontally on the horizontal outer slide rail 57 via the connector.

[0042] like Figure 9 Preferably, a brush 510 is provided on the dust inlet of the dust hood 51. The brush 510 rests against the outer surface of the filter screen 20 and is used to remove stubborn dust and other solid particles on the surface of the filter screen 20 by physical scraping.

[0043] In actual design, the brush 510 may be made of nylon-carbon fiber composite bristles, while the suction pipe 52 and exhaust pipe 56 may be made of corrugated silicone. The suction fixing pipe 53 may be made of metal, and the material may be the same as that of the frame 10.

[0044] In practical applications, driven by the vacuum blower 54, the solid particles blown off the filter screen 20 by the vacuum blower 31 are sucked in through the vacuum hood 51, and then discharged into the space through the vacuum pipe 52, the fixed vacuum pipe 53, the vacuum blower 54, the one-way valve 55 and the discharge pipe 56.

[0045] like Figure 8 A preferred design is that the dust outlet of the dust hood 51 is equipped with a bearing 522, and the bearing 522 is connected to the inlet of the dust suction pipe 52 via a metal connecting short pipe 521. The connecting short pipe 521 can rotate relative to the dust hood 51 by means of the bearing 522, so that when the dust suction pipe 52 moves under the action of the dust hood 51, the dust suction pipe 52 will not affect the translation of the dust hood 51. The outlet of the dust suction pipe 52 is connected to the dust suction interface 530 via a metal connecting short pipe 521.

[0046] like Figures 1 to 6 The lifting transmission mechanism includes transmission components located at both ends of the filter screen 20. These transmission components include an inner transmission belt 71, an inner upper wheel 712, and an inner lower wheel 711 located inside the filter screen 20, and an outer transmission belt 72, an outer upper wheel 723, and an outer lower wheel located outside the filter screen 20. The inner lower wheel 711, located at the lower part of the frame 10, is connected to the inner upper wheel 712 located at the upper part of the frame 10 via the inner transmission belt 71. The inner lower wheel 711 is also connected to the outer lower wheel at the lower part of the frame 10 and the outer upper wheel 723 located at the upper part of the frame 10 via the outer transmission belt 72. The inner lower wheel 711 is connected to the transmission shaft 94. Next, the drive shaft 94 is connected to the output shaft of the lifting drive motor 91 via the reduction gearbox 92. The drive shaft 94 rotates under the drive of the lifting drive motor 91, which in turn drives the inner lower wheel 711 to rotate. Then, the inner lower wheel 711 drives the inner upper wheel 712 to rotate via the inner drive belt 71, and drives the outer upper wheel 723 and the outer lower wheel to rotate via the outer drive belt 72, thereby realizing the synchronous movement of the outer drive belt 72 and the inner drive belt 71. The drive shafts 94 connected to the inner lower wheels 711 at both ends of the filter screen 20 are connected via the coupling 93 and are driven to rotate by the lifting drive motor 91.

[0047] In the actual design, the gearbox 92 is preferably a worm gear reducer, which has the advantages of accurate braking, reciprocating operation, instantaneous stopping, and prevention of slippage deviation. The lifting drive motor 91 is a right-angle motor, so it is not limited.

[0048] In practical design, the inner lower pulley 711 has a wider wheel surface and needs to be connected to both the inner drive belt 71 and the outer drive belt 72. The outer lower pulleys include a first outer lower pulley 721 and a second outer lower pulley 722. The design of these two outer lower pulleys 721 and 722 is to ensure that the movement speed of the outer drive belt 72 is consistent with that of the inner drive belt 71. Figure 5Furthermore, the two outer lower pulleys can provide a certain tension to the outer drive belt 72.

[0049] In practical design, the inner drive belt 71, outer drive belt 72, inner horizontal drive belt 331, and outer horizontal drive belt 581 can be made of polyurethane material, with embedded steel wires and serrations for meshing with the corresponding wheels (toothed gears). Additionally, pressure plates (not shown in the figure) can be provided for the inner drive belt 71 and outer drive belt 72 to provide a fixing function.

[0050] like Figures 1 to 4 A vertical slide rail 60 is installed at both ends of the frame 10, on the inner and outer sides of the filter screen 20. Limit switches (not shown in the figure) are installed at the top and bottom of each vertical slide rail 60. The two vertical slide rails 60 located on the inner side of the filter screen 20 are each connected to both ends of the horizontal inner slide rail 34 via an inner lifting member 61, and each inner lifting member 61 is connected to the inner transmission belt 71 located at the same end of the frame 10. The two vertical slide rails 60 located on the outer side of the filter screen 20 are each connected to both ends of the horizontal outer slide rail 57 via an outer lifting member 62, and each outer lifting member 62 is connected to the outer transmission belt 72 located at the same end of the frame 10.

[0051] In this invention, the inner lifting member 61 has two functions: firstly, it can be slidably mounted on the vertical slide rail 60; secondly, it is fixedly connected to the inner transmission belt 71, so that the horizontal inner slide rail 34 moves up and down along the vertical slide rail 60 under the movement of the inner transmission belt 71. The up and down movement of the inner transmission belts 71 at both ends of the frame 10 should be synchronized to ensure that the horizontal inner slide rail 34 remains horizontal. Similarly, the outer lifting member 62 has two functions: firstly, it can be slidably mounted on the vertical slide rail 60; secondly, it is fixedly connected to the outer transmission belt 72, so that the horizontal outer slide rail 57 moves up and down along the vertical slide rail 60 under the movement of the outer transmission belt 72. The up and down movement of the outer transmission belts 72 at both ends of the frame 10 should be synchronized to ensure that the horizontal outer slide rail 57 remains horizontal.

[0052] In this invention, the limit switch on the vertical slide 60 located inside the filter 20 is used to limit the horizontal inner slide 34 vertically, that is, to prevent the dust blower 31 from exceeding its travel range in the vertical direction. Similarly, the limit switch on the vertical slide 60 located outside the filter 20 is used to limit the horizontal outer slide 57 vertically, that is, to prevent the dust collection cover 51 from exceeding its travel range in the vertical direction. Taking the limit switch on the outer side of the filter 20 as an example, when the limit switch at the top of the vertical slide 60 on the outer side of the filter 20 detects that the horizontal outer slide 57 has moved upward and is no longer allowed to rise, the cleaning operation is over or about to be over. When the limit switch at the bottom of the vertical slide 60 on the outer side of the filter 20 detects that the horizontal outer slide 57 has moved downward and is no longer allowed to descend, that is, after the cleaning operation is over, this invention has returned or is about to return to the initial state, waiting for the start of the next cleaning operation.

[0053] refer to Figure 6 Preferably, the inner upper pulley 712 and the outer upper pulley 723 are connected to the frame 10 via a tensioning mechanism 75. In the actual design, the tensioning mechanism 75 includes an inverted U-shaped support 751. The inner upper pulley 712 and the outer upper pulley 723 are connected to the inverted U-shaped support 751 via a rotating shaft 754. The inverted U-shaped support 751 is connected to the top of the frame 10 via a bolt assembly. The bolt assembly includes an adjusting bolt 752, which passes through the inverted U-shaped support 751 and the frame 10 and is then screwed with a locking nut 753. During adjustment, the height of the inverted U-shaped support 751 can be adjusted by adjusting the position of the locking nut 753 on the adjusting bolt 752, thereby achieving tension adjustment of the inner drive belt 71 and the outer drive belt 72. In practice, the tension of the inner drive belt 71 and the outer drive belt 72 can be adjusted from 0.5 to 1.2 kN. Figure 6 The tensioning mechanism 75 shown is for the outer upper wheel 723. For the tensioning mechanism 75 for the inner upper wheel 712, please refer to [reference needed]. Figure 6 To understand.

[0054] In actual implementation, the dust blower 31, dust blower motor 32, dust suction fan 54, dust suction motor 59, trigger sensor 80, limit switch, and lifting drive motor 91 are connected to and controlled by the control device. The control device is a well-known device in the art and will not be described in detail here.

[0055] In actual control, both manual and automatic control modes can be designed.

[0056] When using automatic control, it can run 2-4 times a day on a set schedule. During operation, the dust blower 31 and the dust suction hood 51 always move horizontally and vertically in sync, preferably in a "bow-shaped" path to achieve thorough cleaning of the filter 20. Typically, the dust blower 31 and the dust suction hood 51 start from the lower left or right corner of the filter 20 and move horizontally to the opposite end, then rise vertically to a set height (e.g., 10cm) and then move horizontally in the opposite direction, then continue to rise vertically to the set height and then move horizontally in the opposite direction, repeating this process until the entire filter 20 is cleaned.

[0057] In use, this ventilation device is installed at the ventilation opening of a space. Generally, the dust blower 31 is located inside the space, while the dust collection hood 51 is located outside. On the one hand, the filter 20 intercepts and filters solid particles that are about to enter the space from outside, ensuring that the air inside the space is not affected by polluted air from outside. On the other hand, through the aforementioned control method, the filter 20 is automatically cleaned at regular intervals. That is, the dust blower 31 continuously blows away solid particles from the filter 20, while the dust collection hood 51 simultaneously sucks in and collects the blown-off solid particles, ensuring that the filter 20 is cleaned without causing secondary pollution to the external environment. Thus, effective ventilation is ensured between the inside and outside of the space.

[0058] The advantages of this utility model are:

[0059] 1. In addition to enabling ventilation and air exchange between the inside and outside of the space, this utility model also has an automatic filter cleaning function, which avoids filter clogging after long-term use, ensures the filtration effect, and greatly reduces the cost of filter cleaning and maintenance.

[0060] 2. The double-layer filter of this utility model can meet the dual needs of intercepting large solid particles and filtering small solid particles, and has a good filtration effect.

[0061] 3. This utility model can perform comprehensive and reliable cleaning of the filter screen, with no blind spots, good cleaning effect, avoid filter screen clogging, extend service life, and eliminate the need for frequent manual cleaning and maintenance, saving time and effort. Furthermore, the cleaning process adopts a method of blowing and vacuuming in opposite directions and simultaneously, which ensures the cleaning effect while avoiding secondary pollution of the external environment by the solid particles that fall off during cleaning.

[0062] 4. This utility model can run automatically at set times, such as 2-4 times / day, and its operation is stable and reliable, avoiding the failure caused by overload operation of its own electrical equipment due to filter blockage.

[0063] 5. This utility model is applicable to homes, office buildings, etc., and is especially suitable for spaces located near working environments with large solid particles such as cotton wool and willow catkins, and high dust levels.

[0064] The above describes the preferred embodiment of this utility model and the technical principles used therein. For those skilled in the art, any obvious changes such as equivalent transformations or simple substitutions based on the technical solution of this utility model without departing from the spirit and scope of this utility model shall fall within the protection scope of this utility model.

Claims

1. A self-cleaning ventilation device integrating blowing and suction, characterized in that, The system includes a frame installed at a vent, wherein: a filter screen is mounted on the frame, and a dust blowing mechanism and a dust suction mechanism are respectively provided on the inner and outer sides of the filter screen; the dust blowing mechanism includes a dust blowing fan that blows air toward the filter screen, and the dust suction mechanism includes a dust suction hood that collects solid particles blown off the filter screen by the dust blowing fan; the dust inlet of the dust suction hood is provided with a ring of brushes, the brushes abutting against the outer surface of the filter screen; the dust outlet of the dust suction hood is connected via a dust suction pipe to a dust suction interface on a fixed dust suction pipe located at one end of the frame, and the outlet of the fixed dust suction pipe... The dust collection hood is connected to the inlet of a vacuum cleaner fan, and the outlet of the vacuum cleaner fan is connected to the discharge pipe via a one-way valve. The area of ​​the dust inlet of the dust collection hood is larger than the area of ​​the booster nozzle installed on the outlet of the dust collector fan. The vacuum cleaner fan is a 2000Pa negative pressure fan. The dust collector fan moves horizontally along the inner horizontal slide under the drive of the dust collector motor, and the dust collection hood moves horizontally along the outer horizontal slide under the drive of the vacuum cleaner motor. The inner horizontal slide and the outer horizontal slide move synchronously up and down along the vertical slide under the drive of the lifting transmission mechanism. The dust collector fan and the dust collection hood are arranged opposite each other and move synchronously.

2. The integrated blowing and suction self-cleaning ventilation device as described in claim 1, characterized in that, The filter screen is a single-layer filter screen or a double-layer filter screen, wherein: the double-layer filter screen includes an outer filter screen and an inner filter screen, the outer filter screen includes an outer frame, and the outer frame is embedded with a hydrophobic sponge filter screen that blocks large solid particles and moisture in the air, and the inner filter screen includes an inner frame, and the inner frame is embedded with a composite antistatic sponge filter screen that blocks small solid particles and moisture in the air.

3. The integrated blowing and suction self-cleaning ventilation device as described in claim 1, characterized in that, The dust blowing mechanism includes a dust blowing fan that can be slidably mounted on the horizontal inner slide via an inner slider. The dust blowing motor is installed under one end of the horizontal inner slide. The dust blowing motor drives the dust blowing fan to move horizontally on the horizontal inner slide via an inner horizontal transmission mechanism. Trigger sensors for detecting whether the dust blowing fan has moved into position are installed at both ends of the horizontal inner slide.

4. The integrated blowing and suction self-cleaning ventilation device as described in claim 3, characterized in that, The inner slider is equipped with a stop block for abutting the filter screen.

5. The integrated blowing and suction self-cleaning ventilation device as described in claim 1, characterized in that, The vacuuming mechanism includes a vacuum cover that can be slidably mounted on the horizontal outer slide via an outer slider. The vacuum motor is installed under one end of the horizontal outer slide. The vacuum motor drives the vacuum cover to move horizontally on the horizontal outer slide via an outer horizontal transmission mechanism. Trigger sensors for detecting whether the vacuum cover has moved into position are installed at both ends of the horizontal outer slide.

6. The self-cleaning ventilation device integrating blowing and suction as described in claim 5, characterized in that, The dust outlet of the dust hood is equipped with a bearing, which is connected to the inlet of the dust suction pipe via a connecting short pipe. The connecting short pipe can rotate relative to the dust hood by means of the bearing. The outlet of the dust suction pipe is connected to the dust suction interface via a connecting short pipe.

7. The integrated blowing and suction self-cleaning ventilation device as described in claim 1, characterized in that, The lifting transmission mechanism includes transmission components located at both ends of the filter screen. Each transmission component includes an inner transmission belt, an inner upper wheel, and an inner lower wheel located inside the filter screen, and an outer transmission belt, an outer upper wheel, and an outer lower wheel located outside the filter screen. The inner lower wheel located at the lower part of the frame is connected to the inner upper wheel located at the upper part of the frame via the inner transmission belt. The inner lower wheel is also connected to the outer lower wheel located at the lower part of the frame and the outer upper wheel located at the upper part of the frame via the outer transmission belt. The inner lower wheel is connected to a transmission shaft, and the transmission shaft is connected to the output shaft of the lifting drive motor via a reduction gearbox.

8. The self-cleaning ventilation device integrating blowing and suction as described in claim 7, characterized in that, A vertical slide is installed at each end of the frame, on the inner and outer sides of the filter screen. Limit switches are installed at the top and bottom of each vertical slide. The two vertical slides located on the inner side of the filter screen are each connected to the two ends of the horizontal inner slide via an inner lifting member, and each inner lifting member is connected to the inner drive belt at the same end of the frame. The two vertical slides located on the outer side of the filter screen are each connected to the two ends of the horizontal outer slide via an outer lifting member, and each outer lifting member is connected to the outer drive belt at the same end of the frame.

9. The self-cleaning ventilation device integrating blowing and suction as described in claim 7, characterized in that, The inner upper wheel and the outer upper wheel are connected to the frame via a tensioning mechanism.

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