A device for purifying and disinfecting viruses in the air inlet and return air ducts of central air conditioners

Abstract

The present invention discloses a device for purifying and disinfecting viruses in the air inlet and return air ducts of a central air conditioner, and relates to the field of cleaning and purification of air conditioning ducts, comprising a filter screen, which is installed on a support frame in the air inlet and return air ducts, a cleaning device is installed on the support frame and is located on a side of the filter screen close to the air flow direction, the cleaning device comprises a cover body and a cleaning component, the cleaning component comprises a guide frame arranged along the width direction of the filter screen, and the cleaning component and the cover body can move along the length direction of the filter screen; by arranging the cover body and the cleaning component, the cover body and the cleaning component are alternately moved along the direction of the filter screen, and the guide frame is moved relative to the cover body between a first position and a second position, so that the air inlet and return air ducts can timely and effectively clean the filter screen without stopping the machine, thereby avoiding the problem that pathogens are attached to foreign objects and enter the indoor environment or the working environment of the staff when disassembling with the escape of dust.

Description

Technical Field

[0001] The invention relates to a cleaning and purification technology for air-conditioning ducts, and in particular to a device for purifying and disinfecting viruses in air inlet and return air ducts of a central air-conditioning system. Background Art

[0002] When the central air conditioner is in use, an air outlet 100 and an air return outlet 200 are usually provided indoors, and the air return outlet is connected to the air inlet of the central air conditioner through a pipeline. Fig.14 As shown, the outside air and the indoor air are transported to the node with the filter assembly through the air inlet and return air ducts 300, and the air is sent to the refrigeration device 400 after being filtered and purified. The cold air after passing through the refrigeration device will be transported to the air outlet and enter the room;

[0003] The existing filter components generally install a filter net at the pipeline to filter foreign matter such as particulate matter in the air. However, with the increase of usage time, the foreign matter attached to the filter net increases, affecting the filtering and ventilation efficiency of the filter net. At the same time, some pathogens are easy to grow in the foreign matter. As some micro dust escapes from the other side of the filter net, it enters the indoor environment and endangers the health of indoor personnel. Although most of them currently use manual regular cleaning, it requires the removal of the filter net. The disassembly and assembly steps are cumbersome and the workload is large. The disassembly process will also cause the foreign matter on the filter net to escape, and the air conditioner needs to be shut down during the disassembly and replacement process, affecting the normal use of the central air conditioner. Summary of the invention

[0004] The purpose of the present invention is to provide a virus-disinfecting device for purifying the air inlet and return air ducts of a central air conditioner to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solution: a device for purifying and disinfecting viruses in the air inlet and return air ducts of a central air conditioner, comprising:

[0006] The filter is installed on the support frame in the air inlet and return air ducts;

[0007] A cleaning device, which is mounted on the support frame and is located on a side of the filter screen close to the airflow direction, the cleaning device comprising a cover body, one side of the cover body is slidably connected to one side of the support frame, and a first opening is provided on a side of the cover body close to the filter screen, a cleaning component is provided in the cover body, the cleaning component comprises a guide frame arranged along the width direction of the filter screen, a cavity is provided in the guide frame, a second opening connected to the cavity is provided on a side of the guide frame close to the filter screen, a suction pipe connected to the cavity is installed on a side of the guide frame away from the filter screen, and the suction pipe is connected to the suction mechanism to form a negative pressure at the second opening;

[0008] The cleaning component and the cover body can move along the length direction of the filter screen, and the cleaning component can move to a first position and a second position relative to the cover body. When in the first position and the second position, the cleaning component is located at two ends of the width direction of the cover body, respectively, and the cleaning component and the cover body move in the same direction;

[0009] A first driving member, which is used to drive the cover body to move;

[0010] The second driving member is used for driving the cleaning member to move.

[0011] Furthermore, the first driving member includes two lead screws, which are installed in the support frame and rotatably connected to the support frame, two first sliding blocks are sleeved on the surface of the lead screws, and a support member is fixedly installed on the side of the four first sliding blocks close to the cover body, the support member is connected to the cover body, and a first sliding groove for the support member to move is opened on one side of the support frame, one end of the two lead screws is fixedly connected to a transmission wheel, and the two transmission wheels are connected by a transmission belt, and one of the lead screws is connected to a driving member A for driving its rotation.

[0012] Furthermore, a first ratchet is rotatably connected inside the first slider, a first sliding nail is fixedly connected to the inner wall of the first ratchet, the first sliding nail is slidably connected to the spiral groove on the surface of the screw, a second sliding groove is opened on the side of the first slider away from the filter screen, and a first ratchet plate is slidably connected in the second sliding groove.

[0013] Furthermore, a support extends from the side of the first slider away from the filter screen, and a cross bar is slidably connected to the inner wall of the support on the same side. Two wedge-shaped push plates are fixedly connected to the side of the cross bar close to the first ratchet plate. An entrance connected to the second slide groove is opened on one side of the first slider, and the wedge push plate can enter the second slide groove from the entrance and push the first ratchet plate to a state of being squeezed on the surface of the first ratchet wheel, so that the first ratchet plate limits the first ratchet wheel.

[0014] Furthermore, a fourth sliding groove is provided in the first sliding block, a conical push ring is fixedly connected to one side of the first ratchet, a first spring is arranged between one side of the conical push ring and the inner wall of the first sliding block, the first spring is sleeved outside the lead screw, and the support member includes a first vertical rod and a second vertical rod, the first vertical rod is fixedly connected to one side of the first sliding block, one end of the second vertical rod is fixedly connected to the cover body, the inner wall of the first vertical rod is slidably connected to the surface of the second vertical rod, a push rod is fixedly installed in the second vertical rod, a tension spring is fixedly connected between the first vertical rod and the second vertical rod, one end of the push rod passes through the first vertical rod and the first sliding block and is slidably connected to the first vertical rod and the inner wall of the first sliding block, and the end of the push rod is located on the moving path of the conical push ring.

[0015] Furthermore, the second driving member includes two second sliding blocks respectively mounted on the two lead screws, the second sliding block is located between two adjacent first sliding blocks, a push block is fixedly connected to the side of the second sliding block away from the filter screen, the push block is slidably connected to the cross bar, and two limit blocks are respectively arranged on the cross bar between the push block and the two first sliding blocks.

[0016] Furthermore, a second ratchet is rotatably connected in the second slider, a second sliding pin is fixedly connected to the inner wall of the second ratchet, the second sliding pin is slidably connected to the spiral groove on the surface of the lead screw, a third sliding groove is provided on the side of the second slider close to the cover, and a second ratchet plate is slidably connected in the third sliding groove;

[0017] When the cleaning component is located at the first position, the first ratchet plate releases the limit on the first ratchet wheel, and the second ratchet plate limits the limit on the second ratchet wheel;

[0018] When the cleaning component is located at the second position, the first ratchet plate limits the first ratchet wheel, and the second ratchet plate releases the limit on the second ratchet wheel.

[0019] Furthermore, an L-shaped bracket is fixedly installed on the side of the second sliding block close to the cover body, one end of the two L-shaped brackets is fixedly connected to one side of the guide frame, a fifth sliding groove is provided on the side of the L-shaped bracket away from the guide frame, an L-shaped push rod is slidably connected in the fifth sliding groove, one end of the L-shaped push rod is fixedly connected to one side of the second ratchet plate, a second spring is installed between the other end of the L-shaped push rod and the inner wall of the L-shaped bracket, a side push rod is provided on the moving path of the L-shaped push rod, and the side push rod is fixedly connected to the inner surface of the cover body.

[0020] Furthermore, a second limit plate and two first limit plates are slidably connected to the cross bar, one end of the two first limit plates is fixedly connected to one side of the cover body, a guide rod is fixedly connected between the two first limit plates, the second limit plate is slidably connected to the guide rod, and the second limit plate is slidably connected to the inner wall of the push block, and a plurality of limit columns distributed in a linear array are arranged on one side of the support frame close to the first limit plate, a first protrusion is arranged on one side of the first limit plate, a second protrusion is arranged on one side of the second limit plate, and when the first protrusion is located between two adjacent limit columns, the second protrusion is located outside the limit column, and when the first protrusion is located outside the limit column, the second protrusion is located between two adjacent limit columns.

[0021] Furthermore, a limit block close to the wedge-shaped push plate is slidably connected to the cross bar, and a third spring is connected between the limit block and the wedge-shaped push plate.

[0022] Compared with the prior art, the device for purifying and disinfecting viruses in the air inlet and return air ducts of a central air conditioner provided by the present invention has the following beneficial effects:

[0023] The central air-conditioning air inlet and return air duct purification and virus sterilization equipment, by arranging a cover body and a cleaning component, makes the cover body and the filter form a relatively sealed space, and cleans in the space through the cleaning component, and through the alternate movement of the cover body and the cleaning component along the direction of the filter, and the movement of the guide frame relative to the cover body between the first position and the second position, the air inlet and return air ducts can clean the filter in a timely and effective manner without stopping the air conditioner, and does not affect the normal use of the air conditioner, avoids the accumulation of foreign matter that causes the filtering effect and air permeability efficiency of the filter to be greatly affected, and avoids the problem of pathogens attaching to foreign matter and entering the indoor environment or the working environment of the staff when disassembling with the escape of dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0025] Figure 1 A schematic diagram of the structure after a cleaning device is installed at the air inlet and return air ducts provided in an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of the structure of the cleaning device provided by an embodiment of the present invention in a state where the cover body and the filter screen are separated;

[0027] Figure 3 A schematic diagram of the state of a cleaning component provided by an embodiment of the present invention when it is located at a first position and a second position;

[0028] Figure 4 A schematic diagram of a partial structure of a cleaning device provided in an embodiment of the present invention;

[0029] Figure 5 A schematic diagram of a partial structure of a first driving member and a second driving member provided in an embodiment of the present invention;

[0030] Figure 6 The embodiment of the present invention provides Figure 4 A partial longitudinal section and a schematic diagram of the structure in a crossbar separation state;

[0031] Figure 7 The embodiment of the present invention provides Figure 6 The enlarged view of point A in the middle;

[0032] Figure 8 The embodiment of the present invention provides Figure 6 The enlarged view of point B in the middle;

[0033] Fig. 9A schematic diagram of the structure of a cross bar and a guide bar provided in an embodiment of the present invention;

[0034] Fig.10 The embodiment of the present invention provides Figure 3 Schematic diagram of the local longitudinal section structure;

[0035] Fig.11 The embodiment of the present invention provides Fig.10 Enlarged view of point C in the middle;

[0036] Fig.12 A schematic diagram of a partial structure of a flow guide frame provided in an embodiment of the present invention;

[0037] Fig.13 A schematic diagram of a partial structure of a cleaning roller brush and a driving component provided on a guide frame according to an embodiment of the present invention;

[0038] Fig.14 A schematic diagram of an air outlet, an air return outlet, and air inlet and return air ducts of a central air conditioner in the prior art provided for an embodiment of the present invention.

[0039] Description of reference numerals:

[0040] 1. Filter screen; 2. Support frame; 21. End plate; 3. Cover body;

[0041] 4. Cleaning component; 41. Guide frame; 42. Cavity; 43. Second opening; 44. Suction pipe; 45. Cleaning roller brush; 46. Driving component;

[0042] 5. First driving member; 501. Lead screw; 502. First slider; 503. Support member; 5031. First vertical rod; 5032. Second vertical rod; 5033. Push rod; 5034. Tension spring; 504. First slideway; 505. First ratchet; 506. Second slideway; 507. First ratchet plate; 508. Support; 509. Crossbar; 510. Wedge-shaped push plate; 511. Fourth slideway; 512. Conical push ring; 513. First spring;

[0043] 6. Second driving member; 601. Second slider; 602. Push block; 603. Limit block; 604. Second ratchet; 605. Third slide; 606. Second ratchet plate; 607. L-shaped bracket; 608. Fifth slide; 609. L-shaped push rod; 610. Second spring; 611. Side push rod; 612. First limit plate; 613. Second limit plate; 614. Guide rod; 615. Limit column; 616. First protrusion; 617. Second protrusion; 618. Third spring;

[0044] 7. First position; 8. Second position;

[0045] 100. Air outlet; 200. Return air outlet; 300. Air inlet and return air ducts; 400. Refrigeration device. DETAILED DESCRIPTION

[0046] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0047] The central air conditioning system adjusts the indoor temperature and humidity through air flow, but this also means that it will spread airborne particles, viruses and bacteria throughout the building. If there are pathogens in the pipes, they may spread to the entire space with the air flow, thereby increasing the risk of infection. Installing filter 1 in the air inlet and return air ducts 300 is a common method in the existing method. Although the setting of filter 1 can block foreign matter such as dust in the pipes when the air flows, filter 1 will also cause foreign matter to accumulate. Some pollutants such as mold or viruses are also easy to grow in the accumulation area, thereby continuously attaching to some particles escaped from filter 1 and spreading to the indoor environment. Therefore, timely cleaning of filter 1 is necessary. The filter is fixed in the pipe by some locking components. In the prior art, it is generally disassembled manually, and the disassembly process requires a relatively cumbersome disassembly process, as well as the subsequent installation process after the filter is cleaned. The process is complicated. The cleaning process of the filter 1 is cumbersome and labor-intensive. Some existing technologies also directly set cleaning components such as roller brushes at the filter to clean the foreign matter on the filter. However, this needs to be done when the air conditioner is shut down. Otherwise, the foreign matter will be re-attached to the filter and affect the normal operation of the central air conditioner. As described in the background technology, the cleaning of the filter 1 has always been a difficulty in the industry at this stage. The main reason is that the disassembly and installation of the filter depends on manual labor, which is affected by uncertain factors such as time, professional ability and cost. It is often difficult to ensure that the filter 1 is cleaned in a timely and effective manner to a certain extent, and the shutdown problem during the cleaning process is also an urgent problem to be solved. To this end, the present invention provides a virus purification and disinfection device for the air inlet and return air ducts 300 of the central air conditioner. The filter can be cleaned in a timely and effective manner without stopping the air conditioner, and the accumulation of foreign matter can be avoided, resulting in a significant impact on the filtering effect and air permeability efficiency of the filter.

[0048] For examples, see Figure 1 - Fig.14 , a virus disinfection device for purifying the air inlet and return air ducts of a central air conditioner, comprising:

[0049] The filter screen 1 is installed on the support frame 2 in the air inlet and return air ducts 300. The support frame 2 is sealed and connected to the inner wall of the air inlet and return air ducts 300. After the filter screen 1 is installed, it can be fixed by the end plate 21, so that it is easy to disassemble and install when necessary;

[0050] A cleaning device is mounted on the support frame 2 and is located on a side of the filter screen 1 close to the airflow direction. The cleaning device includes a cover body 3. One side of the cover body 3 is slidably connected to one side of the support frame 2. A first opening is provided on a side of the cover body 3 close to the filter screen 1. A cleaning component 4 is provided in the cover body 3. The cleaning component 4 includes a guide frame 41 provided along the width direction of the filter screen 1. A cavity 42 is provided in the guide frame 41. A second opening 43 communicating with the cavity 42 is provided on a side of the guide frame 41 close to the filter screen 1. A suction pipe 44 communicating with the cavity 42 is installed on a side of the guide frame 41 away from the filter screen 1. The suction pipe 44 is connected to a suction mechanism to form a negative pressure at the second opening 43.

[0051] The cleaning component 4 and the cover body 3 can move along the length direction of the filter screen 1, and the cleaning component 4 can move to a first position 7 and a second position 8 relative to the cover body 3. When in the first position 7 and the second position 8, the cleaning component 4 is located at both ends of the width direction of the cover body 3, and the cleaning component 4 and the cover body 3 move in the same direction;

[0052] A first driving member 5, which is used to drive the cover body 3 to move;

[0053] The second driving member 6 is used for driving the cleaning member 4 to move.

[0054] In one embodiment of the present invention, a specific example of a first driving member 5 and a second driving member 6 is provided: the first driving member 5 includes a first motor, the output end of the first motor is connected to a first threaded rod, and two first threaded sliders are threadedly connected to the first threaded rod; the second driving member 6 includes a second motor, the output end of the second motor is connected to a second threaded rod, and the second threaded rod is threadedly connected to a second threaded slider, the first threaded rod and the second threaded rod are mounted on a support frame 2 and are located at two ends of a filter screen 1, one side of the two first threaded sliders is fixedly connected to a cover body 3, and the cover body 3 is located at one end of the second threaded rod and connected to a sliding block, the sliding block is sleeved on the surface of the second threaded rod and can move freely along its length direction, the second threaded slider is connected to one end of a guide frame 41, and the guide frame 41 is connected to another sliding block at one end close to the first threaded rod, and the sliding block is sleeved on the first threaded rod and can move freely along its length direction;

[0055] Driven by the first motor, the first threaded rod will drive the cover body 3 to move, and driven by the second motor, the second threaded rod will drive the guide frame 41 to move. When performing a cleaning operation, when the cover body 3 moves to the cleaning component 4 at the first position 7, the cover body 3 will move into the area of ​​the filter screen 1 and form a relatively sealed space with one side of the filter screen 1. In the space, the guide frame 41 will move to the second position 8 driven by the second driving member 6. When it moves to the second position 8, the guide frame 41 moves to the edge of the space. Figure 3, which shows a schematic diagram of the cleaning component 4 in the first position 7 and the second position 8 when it moves, that is, in the first position 7 and the second position 8, the cleaning component 4 is respectively located at both ends of the width direction of the cover body 3. In this process, the cavity 42 in the guide frame 41 forms a certain negative pressure under the action of the external suction mechanism, so that the second opening 43 can absorb foreign matter on one side of the filter screen 1 into the cavity 42 and transport it to the outside through the suction pipe 44. Further, a dust bag can be arranged outside the suction pipe to collect the cleaned foreign matter. The suction mechanism is a general fan, which is not drawn in the figure;

[0056] After the guide frame 41 moves to the second position 8, the cover body 3 moves again under the drive of the first driving member 5 until the guide frame 41 is at the first position 7, and then the first driving member 5 drives the guide frame 41 to move to the second position 8, and the movement continues in this way, so that the cover body 3 and the guide frame 41 move alternately in the same direction. The function of the cover body 3 is to keep the guide frame 41 in a relatively sealed space for suction operation to remove foreign matter adsorbed on the surface of the filter screen 1;

[0057] It should be noted that, in this embodiment, a sensing device can be provided at the first position 7 and the second position 8 of the deflector 41 relative to the cover body 3, and the first driving member 5 and the second driving member 6 are connected respectively, and the sensing device is triggered at the relative position to switch the start and stop of the first driving member 5 and the second driving member 6. The sensing device includes but is not limited to an infrared sensing device, which is a prior art and is not described in detail here. A trigger-type starting switch can also be provided, and the device is triggered when the deflector 41 moves to the first position 7 and the second position 8, respectively, to realize the start and stop of the first driving member 5 and the second driving member 6;

[0058] The setting of the suction pipe 44 enables foreign matter sucked out of the filter screen 1 to be discharged outside the cover body 3. Specifically, the cover body 3 is provided with a groove for the suction pipe 44 to move with the guide frame 41, and the suction pipe 44 is connected to a folding dust cover covering the groove to close the groove.

[0059] In one embodiment of the present invention, another specific example of the first driving member 5 and the second driving member 6 is provided: the first driving member 5 includes two lead screws 501, the lead screws 501 are installed in the support frame 2 and are rotatably connected to the support frame 2, two first sliders 502 are sleeved on the surface of the lead screws 501, a support member 503 is fixedly installed on one side of the four first sliders 502 close to the cover body 3, the support member 503 is connected to the cover body 3, and a first slide groove 504 for the support member 503 to move is opened on one side of the support frame 2, one end of the two lead screws are fixedly connected to a transmission wheel, the two transmission wheels are connected by a transmission belt, and one of the lead screws is connected to the A driving member for driving its rotation;

[0060] In one embodiment of the present invention, the A driving member is a third motor, one end of the output shaft of the third motor is connected to one of the lead screws 501, the lead screw 501 is driven to rotate by the third motor and the other lead screw 501 is driven to rotate synchronously under the transmission of the transmission belt;

[0061] In one embodiment of the present invention, in order to enable the screw 501 to drive or not drive the first slider 502 to move when needed when rotating, a method of threading and unlocking the screw 501 and the first slider 502 is provided: the first slider 502 is rotatably connected with the first ratchet 505, the inner wall of the first ratchet 505 is fixedly connected with the first sliding nail, the first sliding nail is slidably connected with the spiral groove on the surface of the screw 501, and a second sliding groove 506 is provided on the side of the first slider 502 away from the filter screen 1, and a first ratchet plate 507 is slidably connected in the second sliding groove 506. Specifically, when the first slider 502 and the screw 501 are needed to be locked, the first slider 502 can be locked with the first ratchet plate 507. When the thread is locked, the first ratchet plate 507 is pressed against the outer surface of the first ratchet wheel 505 so that the end of the first ratchet plate 507 is embedded in the tooth groove of the first ratchet wheel 505, and the first slider 502 is locked with the first ratchet wheel 505, so that when the lead screw 501 rotates, the first slider 502 is driven to move along the axial direction of the lead screw 501 through the cooperation of the first sliding nail. When the first ratchet plate 507 releases the pressure on the surface of the first ratchet wheel 505, the first ratchet wheel 505 can rotate freely in the first slider 502. At this time, the rotation of the lead screw 501 will not drive the first slider 502 to move, and the cover body 3 will stop moving;

[0062] In one embodiment of the present invention, the above-mentioned threaded locking and unlocking method is switched when the guide frame 41 moves to the first position 7 and the second position 8 relative to the cover body 3. That is to say, when the guide frame 41 is located at the first position 7 and the second position 8, the first ratchet plate 507 needs to be subjected to the extrusion force and not subjected to the extrusion force toward the first ratchet wheel 505, respectively, so that it can be stably switched. For this purpose, a switching method is provided. Specifically, a support 508 is extended on the side of the first slider 502 away from the filter screen 1, and a cross bar 509 is slidably connected to the inner wall of the support 508 on the same side. Two wedge-shaped push plates 510 are fixedly connected to the side of the cross bar 509 close to the first ratchet plate 507. An entrance connected to the second slide groove 506 is opened on one side of the first slider 502. The wedge-shaped push plate 510 can enter the second slide groove 506 from the entrance and push the first ratchet plate 507 to a state of being extruded on the surface of the first ratchet wheel 505, so that the first ratchet plate 507 limits the first ratchet wheel 505.

[0063] Due to the accumulation of foreign matter on the filter 1, the cover body 3 is easy to scrape the attachments on the surface of the filter 1 when it moves, so that the attachments of the part of the filter 1 that has not entered the closed space when the cover body 3 moves are pushed and scattered, and the scattered attachments will appear outside the cover body 3. Under the normal working state of the air inlet and return air ducts 300 of the air conditioner, the scattered foreign matter may be re-gathered in the area of ​​the filter 1 that has been cleaned, affecting the efficiency and effect of cleaning. For this reason, when the cover body 3 moves, it is also necessary to first move a certain distance away from the filter 1, so that the contact part between the filter 1 and the first opening of the cover body 3 has a certain gap, so that when the cover body 3 moves, it will not directly contact one side of the filter 1, causing the problem of scraping the attachments on its surface. A specific method for first moving the cover body 3 away from the filter 1 when moving is provided:

[0064] A fourth slide groove 511 is provided in the first slider 502, a conical push ring 512 is fixedly connected to one side of the first ratchet 505, a first spring 513 is provided between one side of the conical push ring 512 and the inner wall of the first slider 502, the first spring 513 is sleeved outside the lead screw 501, and the support member 503 includes a first vertical rod 5031 and a second vertical rod 5032, the first vertical rod 5031 is fixedly connected to one side of the first slider 502, and one end of the second vertical rod 5032 is fixed to the cover body 3. The inner wall of the first vertical rod 5031 is slidably connected with the surface of the second vertical rod 5032, a push rod 5033 is fixedly installed in the second vertical rod 5032, a tension spring 5034 is fixedly connected between the first vertical rod 5031 and the second vertical rod 5032, one end of the push rod 5033 passes through the first vertical rod 5031 and the first slider 502 and is slidably connected with the inner wall of the first vertical rod 5031 and the first slider 502, and the end of the push rod 5033 is located on the moving path of the conical push ring 512;

[0065] When the first ratchet plate 507 and the first ratchet wheel 505 are limited, the rotation of the lead screw 501 will first drive the first ratchet wheel 505 to move the rod along the fourth slide groove 511. At this time, the conical push ring 512 will drive the top rod 5033 to move and enable the second vertical rod 5032 to drive the cover body 3 away from the filter screen 1. When the conical push ring 512 moves to the maximum stroke, it will push the first slider 502 to move, so that the cover body 3 will first move a certain distance away from the filter screen 1 each time it moves axially along the lead screw 501. It should be noted that since the cover body 3 is arranged in the vertical direction to adapt to the air inlet and return air ducts 300, it does not require a large thrust when moving. When the first ratchet plate 507 is not squeezed after the cover body 3 moves to the specified position once, the first spring 513 releases the force and pushes the conical push ring 512 and the first ratchet wheel 505 back to the initial position for the next movement.

[0066] In one embodiment of the present invention, the second driving member 6 includes two second sliders 601 respectively sleeved on the two lead screws 501, the second slider 601 is located between the two adjacent first sliders 502, a push block 602 is fixedly connected to the side of the second slider 601 away from the filter screen 1, the push block 602 is slidably connected to the cross bar 509, and two limit blocks 603 are respectively arranged on the cross bar 509 between the push block 602 and the two first sliders 502. The setting of the two limit blocks 603 enables the cross bar 509 to move by pushing one of the limit blocks 603 through the second slider 601 when the cover body 3 and the guide frame 41 move, and then the cross bar 509 is driven to move in the opposite direction under the obstruction of the second slider 601 when the cover body 3 moves, so that the wedge-shaped push plate 510 on the cross bar 509 pushes the first ratchet plate 507 and contacts and pushes the first ratchet plate 507.

[0067] In one embodiment of the present invention, the movement mode of the cover body 3 is the same as that of a second ratchet 604 rotatably connected in the second slider 601, a second slide pin is fixedly connected to the inner wall of the second ratchet 604, the second slide pin is slidably connected to the spiral groove on the surface of the lead screw 501, a third slide slot 605 is provided on the side of the second slider 601 close to the cover body 3, and a second ratchet plate 606 is slidably connected in the third slide slot 605;

[0068] When the cleaning component 4 is located at the first position 7, the first ratchet plate 507 releases the limit on the first ratchet wheel 505, and the second ratchet plate 606 limits the position on the second ratchet wheel 604;

[0069] When the cleaning component 4 is located at the second position 8, the first ratchet plate 507 limits the first ratchet wheel 505, and the second ratchet plate 606 releases the limit on the second ratchet wheel 604;

[0070] It should be understood that the movement of the second slider 601 is the same as the cooperation between the first slider 502 and the lead screw 501, and will not be described in detail here;

[0071] In order to make the alternating movement of the cover body 3 and the guide frame 41 more stable, at the node where the cover body 3 and the guide frame 41 alternately move and switch, it is necessary to restrict the movement of the cover body 3 or the guide frame 41, that is, when the cover body 3 moves, the guide frame 41 cannot move, and when the guide frame 41 moves, the cover body 3 cannot move. For this reason, the present invention provides a method for restricting the movement of the cover body 3 or the guide frame 41. Specifically, an L-shaped bracket 607 is fixedly installed on the side of the second slider 601 close to the cover body 3, one end of the two L-shaped brackets 607 is fixedly connected to one side of the guide frame 41, and a fifth L-shaped bracket 607 is provided on the side away from the guide frame 41. Slide groove 608, an L-shaped push rod 609 is slidably connected in the fifth slide groove 608, one end of the L-shaped push rod 609 is fixedly connected to one side of the second ratchet plate 606, a second spring 610 is installed between the other end of the L-shaped push rod 609 and the inner wall of the L-shaped bracket 607, a side push rod 611 is arranged on the moving path of the L-shaped push rod 609, the side push rod 611 is fixedly connected to the inner surface of the cover body 3, the function of the side push rod 611 is that when the cover body 3 moves, the movement of the side push rod 611 will drive the L-shaped bracket 607 to move, so that the second ratchet plate 606 and the second ratchet wheel 604 cooperate, so as to realize the alternating movement of the cover body 3 and the guide frame 41;

[0072] A second limiting plate 613 and two first limiting plates 612 are slidably connected on the cross bar 509, one end of the two first limiting plates 612 is fixedly connected to one side of the cover body 3, a guide rod 614 is fixedly connected between the two first limiting plates 612, the second limiting plate 613 is slidably connected to the guide rod 614, and the second limiting plate 613 is slidably connected to the inner wall of the push block 602, a plurality of limiting columns 615 distributed in a linear array shape are arranged on one side of the support frame 2 close to the first limiting plate 612, a first protrusion 616 is arranged on one side of the first limiting plate 612, a second protrusion 617 is arranged on one side of the second limiting plate 613, and when the first protrusion 616 is located between two adjacent limiting columns 615, the second protrusion 617 is located outside the limiting columns 615, and when the first protrusion 616 is located outside the limiting columns 615, the second protrusion 617 is located between two adjacent limiting columns 615, such as Figure 4 and Fig.10 As shown in the figure, when the cover body 3 is away from the filter screen 1, it will drive the first limiting plate 612 and the second limiting plate 613 to move, so that the first protrusion 616 or the second protrusion 617 is inserted into the two adjacent limiting columns 615. It should be noted that the first protrusion 616 and the second protrusion 617 will not be inserted into the adjacent limiting columns 615 at the same time, that is, when the first protrusion 616 is inserted into the adjacent limiting column 615, the second protrusion 617 is located outside the limiting column 615, and vice versa. When setting, it is only necessary to allow the first protrusion 616 and the second protrusion 617 to be inserted into the adjacent limiting column 615. Fig.10In the state shown, a certain height difference is sufficient. Further, in order to make the protrusions more easily enter the two adjacent limiting pillars 615, the thickness of the first protrusion 616 and the second protrusion 617 are both smaller than the distance between the two adjacent limiting pillars 615.

[0073] The limit block 603 close to the wedge-shaped push plate 510 is slidably connected to the cross bar 509, and a third spring 618 is connected between the limit block 603 and the wedge-shaped push plate 510. Its purpose is that when the second sliding block 601 drives the cross bar 509 to move by pushing the limit block 603, the movement of the wedge-shaped push plate 510 will be hindered by the first ratchet plate 507 not being exactly in a relative state with the tooth groove of the first ratchet wheel 505, so that the cross bar 509 cannot move directly. By setting the third spring 618, the limit block 603 has a certain buffering effect. During the rotation of the first ratchet wheel 505, it can cooperate with the first ratchet plate 507 to lock without affecting the movement of the guide frame 41, so as to perform the corresponding movement switching of the cover body 3 and the guide frame 41.

[0074] In one embodiment of the present invention, in order to improve the processing efficiency of the guide frame 41, some foreign matters attached to the filter screen 1 that are difficult to be directly sucked away can also be cleaned in time, two symmetrically arranged roller brushes are rotatably connected to one side of the guide frame 41 close to the filter screen 1, and the two roller brushes are connected to a driving component 46 for driving them to rotate synchronously, and when the two roller brushes rotate, the foreign matters in the part in contact with the filter screen 1 are always cleaned to the first opening in the middle, that is, the rotation directions of the two knurls are opposite, and the rotation direction is toward the first opening;

[0075] See also Fig.12 and Fig.13 , two mutually meshing gears are rotatably mounted on one side of the guide frame 41, and are connected to the rotating shafts of the two cleaning roller brushes 45 through a transmission belt and a transmission wheel, one of the gears is connected to one end of the output shaft of the motor, and the motor drives the gear to rotate to realize the rotation of the two roller brushes;

[0076] It should be noted that an ultraviolet disinfection device (not shown in the figure) can also be installed on the side of the roller brush, such as an ultraviolet lamp. During the cleaning process, the foreign matter that escapes, remains on the surface of the filter 1, and enters the first opening can be purified and disinfected. In some usage environments where there are fewer foreign matters in the air itself, the two roller brushes can be directly replaced with ultraviolet lamps, and the driving component 46 can be selectively removed to perform purification and disinfection during the cleaning process.

[0077] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A device for purifying and disinfecting viruses in the air inlet and return air ducts of a central air conditioner, characterized in that: include: A filter screen (1) mounted on a support frame (2) inside an air inlet and return air duct (300); A cleaning device, which is mounted on a support frame (2) and is located on a side of the filter (1) close to the airflow direction, the cleaning device comprising a cover body (3), one side of the cover body (3) being slidably connected to a side of the support frame (2), and a first opening being provided on a side of the cover body (3) close to the filter (1), a cleaning component (4) being provided inside the cover body (3), the cleaning component (4) comprising a guide frame (41) arranged along the width direction of the filter (1), a cavity (42) being provided inside the guide frame (41), a second opening (43) communicating with the cavity (42) being provided on a side of the guide frame (41) close to the filter (1), a suction pipe (44) communicating with the cavity (42) being provided on a side of the guide frame (41) away from the filter (1), the suction pipe (44) being connected to a suction mechanism so as to form a negative pressure at the second opening (43); The cleaning component (4) and the cover body (3) are capable of moving along the length direction of the filter screen (1); the cleaning component (4) is capable of moving relative to the cover body (3) to a first position (7) and a second position (8); when in the first position (7) and the second position (8), the cleaning component (4) is located at two ends of the cover body (3) in the width direction, respectively; and the cleaning component (4) and the cover body (3) move in the same direction; A first driving member (5) used for driving the cover body (3) to move; A second driving member (6) for driving the cleaning member (4) to move; The first driving member (5) comprises two lead screws (501), the lead screws (501) being mounted in the support frame (2) and rotatably connected to the support frame (2), two first sliding blocks (502) being sleeved on the surface of each lead screw (501), a support member (503) being fixedly mounted on one side of the four first sliding blocks (502) close to the cover body (3), the support member (503) being connected to the cover body (3), and a first sliding groove (504) for the support member (503) to move is provided on one side of the support frame (2), one end of each lead screw is fixedly connected to a transmission wheel, the two transmission wheels are connected to each other via a transmission belt, and one of the lead screws is connected to a driving member A for driving the rotation thereof; A first ratchet wheel (505) is rotatably connected inside the first slider (502), a first sliding pin is fixedly connected to the inner wall of the first ratchet wheel (505), the first sliding pin is slidably connected to the spiral groove on the surface of the lead screw (501), a second sliding groove (506) is provided on the side of the first slider (502) away from the filter screen (1), and a first ratchet plate (507) is slidably connected inside the second sliding groove (506); A support (508) is extended from one side of the first slider (502) away from the filter screen (1); a cross bar (509) is slidably connected to the inner wall of the support (508) on the same side; two wedge-shaped push plates (510) are fixedly connected to the side of the cross bar (509) close to the first ratchet plate (507); an entrance connected to the second slide groove (506) is opened on one side of the first slider (502); the wedge-shaped push plate (510) can enter the second slide groove (506) from the entrance and push the first ratchet plate (507) to a state of being squeezed on the surface of the first ratchet wheel (505), so that the first ratchet plate (507) limits the first ratchet wheel (505); A fourth slide groove (511) is provided in the first slider (502); a conical push ring (512) is fixedly connected to one side of the first ratchet (505); a first spring (513) is provided between one side of the conical push ring (512) and the inner wall of the first slider (502); the first spring (513) is sleeved outside the lead screw (501); the support member (503) comprises a first vertical rod (5031) and a second vertical rod (5032); the first vertical rod (5031) is fixedly connected to one side of the first slider (502); one end of the second vertical rod (5032) is connected to the cover body (501); 3) fixed connection, the inner wall of the first vertical rod (5031) is slidably connected to the surface of the second vertical rod (5032), a push rod (5033) is fixedly installed in the second vertical rod (5032), a tension spring (5034) is fixedly connected between the first vertical rod (5031) and the second vertical rod (5032), one end of the push rod (5033) passes through the first vertical rod (5031) and the first sliding block (502) and is slidably connected to the first vertical rod (5031) and the inner wall of the first sliding block (502), and the end of the push rod (5033) is located on the moving path of the conical push ring (512).

2. The device for purifying and disinfecting viruses in the air inlet and return air ducts of a central air conditioner according to claim 1 is characterized in that: The second driving member (6) comprises two second sliding blocks (601) respectively sleeved on the two lead screws (501); the second sliding block (601) is located between two adjacent first sliding blocks (502); a push block (602) is fixedly connected to a side of the second sliding block (601) away from the filter screen (1); the push block (602) is slidably connected to a cross bar (509); and two limit blocks (603) are respectively arranged on the cross bar (509) between the push block (602) and the two first sliding blocks (502).

3. The device for purifying and disinfecting viruses in the air inlet and return air ducts of a central air conditioner according to claim 2 is characterized in that: A second ratchet wheel (604) is rotatably connected inside the second sliding block (601), a second sliding pin is fixedly connected to the inner wall of the second ratchet wheel (604), the second sliding pin is slidably connected to the spiral groove on the surface of the lead screw (501), a third sliding groove (605) is provided on a side of the second sliding block (601) close to the cover body (3), and a second ratchet plate (606) is slidably connected inside the third sliding groove (605); When the cleaning component (4) is located at the first position (7), the first ratchet plate (507) releases the limit on the first ratchet wheel (505), and the second ratchet plate (606) limits the position on the second ratchet wheel (604); When the cleaning component (4) is located at the second position (8), the first ratchet plate (507) limits the first ratchet wheel (505), and the second ratchet plate (606) releases the limit on the second ratchet wheel (604).

4. The device for purifying and disinfecting viruses in the air inlet and return air ducts of a central air conditioner according to claim 3 is characterized in that: An L-shaped bracket (607) is fixedly installed on the side of the second sliding block (601) close to the cover body (3), one end of each of the two L-shaped brackets (607) is fixedly connected to one side of the guide frame (41), a fifth sliding groove (608) is provided on the side of the L-shaped bracket (607) away from the guide frame (41), an L-shaped push rod (609) is slidably connected in the fifth sliding groove (608), one end of the L-shaped push rod (609) is fixedly connected to one side of the second ratchet plate (606), a second spring (610) is installed between the other end of the L-shaped push rod (609) and the inner wall of the L-shaped bracket (607), a side push rod (611) is provided on the moving path of the L-shaped push rod (609), and the side push rod (611) is fixedly connected to the inner surface of the cover body (3).

5. The device for purifying and disinfecting viruses in the air inlet and return air ducts of a central air conditioner according to claim 4 is characterized in that: The cross bar (509) is slidably connected to a second limit plate (613) and two first limit plates (612); one end of the two first limit plates (612) is fixedly connected to one side of the cover body (3); a guide rod (614) is fixedly connected between the two first limit plates (612); the second limit plate (613) is slidably connected to the guide rod (614); and the second limit plate (613) is slidably connected to the inner wall of the push block (602); and a support frame (2) is provided on one side close to the first limit plate (612). A plurality of limiting posts (615) are spaced apart and distributed in a linear array, a first limiting plate (612) is provided with a first protrusion (616) on one side, a second limiting plate (613) is provided with a second protrusion (617) on one side, and when the first protrusion (616) is located between two adjacent limiting posts (615), the second protrusion (617) is located outside the limiting posts (615), and when the first protrusion (616) is located outside the limiting posts (615), the second protrusion (617) is located between two adjacent limiting posts (615).

6. The device for purifying and disinfecting viruses in the air inlet and return air ducts of a central air conditioner according to claim 5 is characterized in that: The limit block (603) close to the wedge-shaped push plate (510) is slidably connected to the cross bar (509), and a third spring (618) is connected between the limit block (603) and the wedge-shaped push plate (510).

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