A fresh air device and a fresh air replacement air conditioner indoor unit

Abstract

The present invention discloses a fresh air device and a fresh air air conditioner indoor unit, comprising a first shell and a second shell, wherein a fan is arranged in the first shell, and a two-way air duct is arranged in the first shell and the second shell along the axial direction of the fan, and a filter assembly is arranged in the second shell, and further comprising: a telescopic rod, which is movably arranged in the second shell and is located on the side of the filter assembly facing the outside; a scraper wheel, which is arranged at one end of the telescopic rod pointing to the filter assembly; and a driving assembly, which is used to drive the telescopic rod to move axially. The present invention is provided with a telescopic rod, a scraper wheel and a driving assembly, and when necessary, the driving assembly can first drive the telescopic rod to drive the scraper wheel to approach the filter assembly, until the scraper wheel and the filter assembly are against each other, and the driving assembly can drive the scraper wheel to rotate, thereby scraping off dust and other attachments attached to the surface of the scraper wheel facing the outside, and then the attachments can be blown out of the second shell through the fan, thereby realizing automatic cleaning of the filter assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of fresh air devices, and in particular to a fresh air device and a fresh air exchange air conditioner indoor unit. Background Art

[0002] Air conditioners are generally used for internal circulation in closed spaces, which results in the lack of ventilation in the indoor air and the increasing turbidity of the air. The fresh air function is crucial to the diversification of air conditioners. Since the indoor space is large, the introduction of fresh air and the discharge of dirty air are crucial to the indoor environment. The existing fresh air devices can basically meet daily use needs, but there are still some shortcomings that need to be improved.

[0003] Patent document CN113719898A discloses a fresh air device and an indoor unit of an air conditioner on November 30, 2021. The fresh air device includes: a housing, the housing forms an air duct and a first connecting port and a second connecting port connected to the air duct, the first connecting port is used to connect with the indoor, and the second connecting port is used to connect with the outdoor; a fan is arranged in the air duct, and the fan includes a fan blade, and the fan blade is rotatably arranged along a first rotation direction and a second rotation direction, so that the air duct discharges polluted air to the outdoor or introduces fresh air to the indoor; wherein the first rotation direction and the second rotation direction rotate in opposite directions. Its beneficial effect is that it solves the problem that the structure of the fresh air device in the prior art is relatively complicated.

[0004] As in the prior art of the above-mentioned patent, a filter component is usually provided in the air duct used for indoor and outdoor air exchange in the fresh air device. After long-term use, the filter component will accumulate dust, flocculent impurities and other attachments, which not only affect the air flow, but also bring impurities back into the room to cause secondary pollution. Therefore, there is an urgent need for a fresh air device and a fresh air air conditioner indoor unit to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a fresh air device and a fresh air exchange air conditioner indoor unit to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A fresh air device and a fresh air air conditioner indoor unit, comprising a first shell and a second shell, wherein a fan is arranged in the first shell, one end of the second shell is connected to the first shell, and the other end is used to connect to the outside, a two-way air duct is arranged in the first shell and the second shell along the axial direction of the fan, a filter assembly is arranged in the second shell, and further comprising: a telescopic rod, which is movably arranged in the second shell and is located on the side of the filter assembly facing the outside; a scraper wheel, which is arranged at one end of the telescopic rod pointing to the filter assembly; a driving assembly, which is used to drive the telescopic rod to move axially, and when the telescopic rod drives the scraper wheel to abut against the surface of the filter assembly, the telescopic rod is driven to drive the scraper wheel to rotate to scrape the attachments on the surface of the filter assembly.

[0008] Preferably, a bracket is fixedly provided in the second shell, a sleeve is rotatably provided on the bracket, the sleeve is movably sleeved outside the telescopic rod and rotates synchronously with the telescopic rod, and a limiting component for limiting the rotation of the sleeve is provided on the bracket.

[0009] Preferably, the driving assembly includes a motor mounted on a bracket, the output end of the motor is coaxially connected to a screw, the screw is coaxially threadedly connected to the telescopic rod, when the telescopic rod is freely telescopic, the limit assembly limits the rotation of the sleeve to promote threaded feed transmission between the screw and the telescopic rod, and when the telescopic rod is restricted in extension, the limit assembly cancels the restriction on the rotation of the sleeve to promote the screw to drive the telescopic rod to rotate synchronously.

[0010] Preferably, the limiting assembly includes a limiting bin arranged on the bracket, one end of the sleeve is coaxially connected to a first toothed disc rotatably arranged in the limiting bin, and a second toothed disc meshing with the first toothed disc is elastically and movably arranged in the limiting bin along the axial direction of the screw.

[0011] Preferably, the filter assembly comprises a frame movably arranged in the second shell, a plurality of filter plates tightly arranged side by side are rotatably arranged in the frame, and both upper and lower ends of the frame are provided with flip assemblies for driving the filter plates to rotate.

[0012] Preferably, the flip assembly includes a first gear coaxially connected to the rotating shaft of the filter plate, the first gear is meshingly connected with a first rack, a linkage frame is provided at the end of the first rack, a second gear is rotatably provided on the frame, an eccentric rod slidably connected to the linkage frame is fixedly provided on the second gear, the second gear extends out of the side wall of the frame, a sliding plate is elastically and movably provided on the inner wall of the second shell, and a second rack matching the second gear is provided on one side of the sliding plate.

[0013] Preferably, a slide groove is provided on the inner wall of the second shell, a slider fixedly connected to the frame body is elastically and movably provided in the slide groove, a clamping assembly and an offset assembly are provided on the slider, the clamping assembly is used to limit the movement of the scraper wheel relative to the filter plate and limit the unidirectional rotation of the scraper wheel after the scraper wheel abuts against the filter plate, and a shovel block for canceling the restriction of the scraper wheel by the clamping assembly is provided on the inner wall of the second shell, and the offset assembly is used to drive the linkage frame and the second rack away from the second gear when the clamping assembly restricts the scraper wheel.

[0014] Preferably, the clamping assembly includes a retraction groove arranged on the slider, a clamping block is elastically and movably arranged in the retraction groove, an inclined surface is arranged on the side of the clamping block facing the outside and cooperates with the wedge shape of the shovel block, and the other side is arranged to be a plane parallel to the end face of the scraper wheel facing the outside, and a clamping column is fixedly arranged, and a plurality of clamping grooves matching the clamping columns are arranged on the outer circumference of the scraper wheel.

[0015] Preferably, the offset assembly includes a stop block movably arranged on the slider between the frame and the card block, the stop block is fixedly connected to a linkage block via a connecting rod, a linkage groove matching the linkage block is provided on the sliding plate, and one end of the stop block extends out of the slider and is provided with a synchronization groove matching the card column.

[0016] A fresh air exchange air conditioner indoor unit comprises a fresh air device, wherein the fresh air device is the fresh air device mentioned above.

[0017] In the above technical solution, the beneficial effects of the present invention are:

[0018] The fresh air device is provided with a telescopic rod, a scraper wheel and a driving assembly. When needed, the driving assembly can first drive the telescopic rod to drive the scraper wheel to approach the filter assembly until the scraper wheel and the filter assembly are butted against each other. The driving assembly can then drive the scraper wheel to rotate, thereby scraping off dust and other attachments on the surface of the scraper wheel facing the outside world, and then the dust can be blown out of the second shell through the fan, thereby realizing automatic cleaning of the filter assembly. In addition, the driving assembly can drive the telescopic rod to move back to move the scraper wheel away from the filter assembly, thereby facilitating the turning over or disassembly and replacement of the filter assembly.

[0019] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0020] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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.

[0022] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the internal structure provided by an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of a front cross-sectional structure provided by an embodiment of the present invention;

[0025] Figure 4 The embodiment of the present invention provides Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0026] Figure 5 A schematic diagram of a side cross-sectional structure provided by an embodiment of the present invention;

[0027] Figure 6 The embodiment of the present invention provides Figure 5 A schematic diagram of the enlarged structure at B in the middle;

[0028] Figure 7 A schematic diagram of a top cross-sectional structure of a sliding plate provided by an embodiment of the present invention;

[0029] Figure 8 The embodiment of the present invention provides Figure 7 Schematic diagram of the enlarged structure at C in the middle;

[0030] Fig. 9 A schematic diagram of a top-down cross-sectional structure of a linkage frame provided by an embodiment of the present invention;

[0031] Fig.10 The embodiment of the present invention provides Fig. 9 Schematic diagram of the enlarged structure at D in the middle;

[0032] Fig.11 A schematic diagram of a top cross-sectional structure of a frame body and a scraper wheel provided in an embodiment of the present invention when they are engaged with each other;

[0033] Fig.12 The embodiment of the present invention provides Fig.11 Schematic diagram of the enlarged structure at E in the middle;

[0034] Fig.13 A schematic diagram of a top-view cross-sectional structure of a frame provided by an embodiment of the present invention when it moves with a scraper wheel;

[0035] Fig.14 The embodiment of the present invention provides Fig.13 The enlarged structural diagram at F in the middle;

[0036] Fig.15 A schematic diagram of a top cross-sectional structure of a frame and a scraper wheel when they are separated according to an embodiment of the present invention;

[0037] Fig.16 The embodiment of the present invention provides Fig.15 Schematic diagram of the enlarged structure at G in the middle.

[0038] Description of reference numerals:

[0039] 1. First housing; 2. Second housing; 3. Fan; 4. Telescopic rod; 5. Scraper; 6. Bracket; 7. Casing; 8. Motor; 9. Screw; 10. Limiting bin; 11. First toothed disc; 12. Second toothed disc; 13. Frame; 14. Filter plate; 15. First gear; 16. First rack; 17. Linkage frame; 18. Second gear; 19. Eccentric rod; 20. Sliding plate; 21. Second rack; 22. Slide groove; 23. Sliding block; 24. Shovel block; 25. Retraction groove; 26. Block; 27. Block column; 28. Slot; 29. ​​Stop block; 30. Connecting rod; 31. Linkage block; 32. Linkage groove; 33. Synchronous groove; 34. First elastic member; 35. Second elastic member; 36. Third elastic member. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0041] See also Figure 1-16 A fresh air device and a fresh air air conditioner indoor unit provided by an embodiment of the present invention include a first shell 1 and a second shell 2, a fan 3 is arranged in the first shell 1, one end of the second shell 2 is connected to the first shell 1, and the other end is used to connect to the outside, a two-way air duct is arranged in the first shell 1 and the second shell 2 along the axial direction of the fan 3, a filter assembly is arranged in the second shell 2, and further includes: a telescopic rod 4, which is movably arranged in the second shell 2 and is located on the side of the filter assembly facing the outside; a scraper 5, which is arranged at one end of the telescopic rod 4 pointing to the filter assembly; a driving assembly, which is used to drive the telescopic rod 4 to move axially, and when the telescopic rod 4 drives the scraper 5 to abut against the surface of the filter assembly, the telescopic rod 4 is driven to drive the scraper 5 to rotate to scrape the attachments on the surface of the filter assembly.

[0042] Specifically, the first shell 1 is provided with a first connecting port and a second connecting port along the front and back of the two-way air duct, the second shell 2 is connected to one side of the first connecting port, and the second connecting port is used to communicate with the indoor room; the second shell 2 is in the shape of a rectangular frame; the fan 3 includes a driving motor and blades, the driving motor can drive the blades to rotate forward and reverse to realize two airflows in opposite directions in the two-way air duct, which are used for indoor and outdoor exhaust and air intake respectively; the filter component is arranged in the second shell 2 near the connection position between the second shell 2 and the first shell 1, and completely blocks a section of the two-way air duct. The activities of the telescopic rod 4 include axial extension and axial rotation. The extension direction of the telescopic rod 4 is set along the direction of the two-way air duct, and the telescopic rod 4 is correspondingly set at the center of the second shell 2; the scraper 5 includes a rim and a scraper, and the scraper is radial from the center, preferably in an X shape, a M shape, etc.; the range of the scraper wheel 5 scraping the surface of the filter component completely covers the range of the two-way air duct passing through the filter component; the scraper wheel 5 is coaxially fixedly connected to the telescopic rod 4; the attachments on the surface of the filter component scraped off by the scraper wheel 5 fall into the second shell 2 and will not enter the first shell 1; the driving component drives the axial movement of the telescopic rod 4 in both directions, and drives the rotation of the rotating shaft of the telescopic rod 4 in both directions. In actual use of the present technical solution, when it is necessary to clean the surface of the filter assembly, the driving assembly can first drive the telescopic rod 4 to move toward the filter assembly, that is, the telescopic rod 4 drives the scraper 5 to approach the filter assembly, until the scraper 5 abuts against the filter assembly, and the driving assembly can drive the scraper 5 to rotate, thereby scraping off the dust and other attachments attached to the surface of the scraper 5 facing the outside, and then the second shell 2 can be blown out by the fan 3, thereby realizing automatic cleaning of the filter assembly. Afterwards, the driving assembly changes the driving direction, which can drive the telescopic rod 4 to move back, so that the scraper 5 is away from the filter assembly, which can facilitate subsequent operations such as turning over or disassembling and replacing the filter assembly.

[0043] Compared with the prior art, a fresh air device proposed in an embodiment of the present invention is provided with a telescopic rod 4, a scraper 5 and a driving component. When necessary, the driving component can first drive the telescopic rod 4 to drive the scraper 5 to approach the filter component until the scraper 5 and the filter component are abutted. The driving component can then drive the scraper 5 to rotate, thereby scraping off dust and other attachments attached to the surface of the scraper 5 facing the outside world, and then the dust can be blown out of the second shell 2 through the fan 3, thereby realizing automatic cleaning of the filter component. In addition, the driving component can drive the telescopic rod 4 to move back to move the scraper 5 away from the filter component, which is convenient for turning over or disassembling and replacing the filter component.

[0044] As a preferred technical solution of this embodiment, a bracket 6 is fixedly provided in the second shell 2, and a sleeve 7 is rotatably provided on the bracket 6. The sleeve 7 is movably sleeved outside the telescopic rod 4 and rotates synchronously with the telescopic rod 4. A limiting component for limiting the rotation of the sleeve 7 is provided on the bracket 6. Specifically, the bracket 6 is arranged on the side close to the outside; the sleeve 7 is coaxial with the telescopic rod 4, and a convex ridge arranged along its axial direction is provided in the sleeve 7, and a groove matching the convex ridge is provided on the outer wall of the telescopic rod 4. The convex ridge and the groove enable the telescopic rod 4 to move axially relative to the sleeve 7, and the telescopic rod 4 rotates synchronously with the sleeve 7; the limiting component limits the rotation of the sleeve 7, that is, limits the rotation of the telescopic rod 4.

[0045] As the preferred technical solution of this embodiment, the driving assembly includes a motor 8 installed on the bracket 6, and the output end of the motor 8 is coaxially connected with a screw 9, and the screw 9 is coaxially threadedly connected with the telescopic rod 4. When the telescopic rod 4 is freely telescopic, the limit assembly limits the rotation of the sleeve 7 to promote the screw 9 and the telescopic rod 4 to undergo threaded feed transmission, and when the telescopic rod 4 is limited in telescopic extension, the limit assembly cancels the restriction on the rotation of the sleeve 7 to promote the screw 9 to drive the telescopic rod 4 to rotate synchronously. Specifically, the motor 8 is arranged on the side of the bracket 6 facing the outside, the output end of the motor 8 points to the inner side of the second shell 2, and the output end is axially coaxial with the telescopic rod 4; the screw 9 is coaxial with the sleeve 7 and is arranged in the sleeve 7, the telescopic rod 4 is arranged between the screw 9 and the sleeve 7, and a threaded cavity is arranged in the telescopic rod 4. The telescopic rod 4 is free to extend and retract as follows: the telescopic rod 4 does not drive the scraper wheel 5 to abut against the filter assembly. At this time, the telescopic rod 4 is restricted in rotation by the limiting assembly, so that the telescopic rod 4 and the rotating screw 9 undergo thread feed transmission; the telescopic rod 4 is restricted in extension and retraction as follows: the telescopic rod 4 drives the scraper wheel 5 to abut against the filter assembly, and the screw 9 continues to rotate in the same direction, then the limiting assembly passively cancels the function of restricting the rotation of the telescopic rod 4, and the telescopic rod 4 rotates synchronously with the screw 9 with the help of the thread; in other words, the telescopic rod 4 and the scraper wheel 5 keep moving within the axial movement range and can move in reverse direction, and at both ends of this movement range, if the screw 9 continues to drive the telescopic rod 4 to rotate in the same direction, the limiting assembly passively cancels the restriction on the rotation of the telescopic rod 4, and the telescopic rod 4 begins to rotate synchronously with the screw 9 through the thread, and the two no longer undergo thread feed transmission in the same direction. At the same time, the telescopic rod 4 also drives the scraper wheel 5 to rotate synchronously.

[0046] As a preferred technical solution of this embodiment, the limiting assembly includes a limiting bin 10 arranged on the bracket 6, one end of the sleeve 7 is coaxially connected to a first toothed disc 11 rotatably arranged in the limiting bin 10, and a second toothed disc 12 meshing with the first toothed disc 11 is elastically arranged in the limiting bin 10 along the axial direction of the screw 9. Specifically, the limiting bin 10 is arranged on the side of the bracket 6 away from the outside world; the outer diameter of the first toothed disc 11 is larger than the outer diameter of the sleeve 7, and the first toothed disc 11 is rotatably arranged in the limiting bin 10; a circle of continuous convex teeth is arranged on the end faces of the first toothed disc 11 and the second toothed disc 12; a spiral spring piece is arranged on the side of the second toothed disc 12 away from the first toothed disc 11, and the spiral spring piece keeps pushing the second toothed disc 12 close to the first toothed disc 11, that is, keeps the first toothed disc 11 meshing with the second toothed disc 12, thereby limiting the relative limit of the sleeve 7 to a certain extent. The position bin 10 rotates, but when the sleeve 7 is driven by a large torque, the sleeve 7 drives the first toothed disc 11 to rotate relative to the second toothed disc 12, so that the convex teeth of the two toothed discs are squeezed against each other to be dislocated one by one, and the spiral spring piece undergoes repeated elastic deformation; in actual use, when the extension and retraction of the telescopic rod 4 is not restricted, the first toothed disc 11 and the second toothed disc 12 remain engaged under the action of the spiral spring piece, so that the rotation of the sleeve 7 and the telescopic rod 4 is restricted, and the telescopic rod 4 is able to perform thread feed transmission with the rotating screw 9; and when the telescopic rod 4 approaches the filter assembly and drives the scraper 5 to abut against the filter assembly, the movement of the telescopic rod 4 in the same direction is rigidly restricted, and the rotation of the screw 9 will drive the telescopic rod 4 to rotate synchronously, thereby driving the sleeve 7 to rotate, and then the first toothed disc 11 and the second toothed disc 12 will rotate relative to each other and continuously squeeze and dislocate.

[0047] Since the filter assembly can filter dust and impurities in the air on both the front and rear sides along the two-way air duct direction, it can filter the air entering the room from the outside and the air discharged from the room to the outside, thus hindering the discharge of indoor air impurities.

[0048] In another embodiment of the present invention, the filter assembly includes a frame 13 movably arranged in the second shell 2, and a plurality of filter plates 14 arranged closely side by side are rotatably arranged in the frame 13. Both upper and lower ends of the frame 13 are provided with flipping assemblies for driving the filter plates 14 to rotate. Specifically, the frame 13 is rectangular, and the four sides slide in contact with the inner wall of the second shell 2; the rotation axis of the filter plate 14 is vertically arranged; the side end surface of the filter plate 14 is arc-shaped, and is provided with damping strips. When each filter plate 14 is perpendicular to the direction of the two-way air duct and is coplanar, the side damping strips thereof contact each other, thereby promoting sealing, and covering the inner side of the frame 13, ensuring that the filtering function of the filter plate 14 is complete; the flipping assembly is used to control the synchronous flipping of each filter plate 14, that is, the two sides of the filter plate 14 alternately face the outside and can be cleaned by the scraper 5.

[0049] As a preferred technical solution of this embodiment, the flip assembly includes a first gear 15 coaxially connected to the rotating shaft of the filter plate 14, the first gear 15 is meshingly connected to the first rack 16, a linkage frame 17 is provided at the end of the first rack 16, a second gear 18 is rotatably provided on the frame 13, an eccentric rod 19 slidably connected to the linkage frame 17 is fixedly provided on the second gear 18, the second gear 18 extends out of the side wall of the frame 13, a sliding plate 20 is elastically and movably provided on the inner wall of the second shell 2, and a second rack 21 matching the second gear 18 is provided on one side of the sliding plate 20. Specifically, transmission bins are provided at the upper and lower ends of the frame 13, and the first gear 15 and the first rack 21 are provided. The rack 16, the linkage frame 17, and the second gear 18 are all arranged in the transmission bin; the end of the rotating shaft of the filter plate 14 rotates and extends into the transmission bin, and the first gear 15 is connected thereto; the first rack 16 can preferably be two, circumferentially symmetrically distributed, and the multiple first gears 15 can be divided into two groups on both sides, and the two groups of first gears 15 are respectively meshed with the two first racks 16. When the first gear 15 is odd, the middle first gear 15 can mesh with the two first racks 16 on two opposite sides; the first rack 16 moves along the direction in which the first gears 15 are arranged, and the activity directions of the two first racks 16 are opposite, but the rotation directions of the first gears 15 are the same; the linkage frame 17 moves with the first When a rack 16 moves, the relative movement of the eccentric rod 19 in the linkage frame 17 is perpendicular to the moving direction of the first rack 16; the axial direction of the eccentric rod 19 is parallel to the axial direction of the second gear 18, and is arranged close to the edge of the second gear 18; the second gear 18 drives the eccentric rod 19 to move in a circle, and then the eccentric rod 19 slides back and forth in the sliding block, driving the first rack 16 to move back and forth; the moving direction of the sliding plate 20 is consistent with the moving direction of the first rack 16, and the inner wall of the second housing 2 is provided with a movable groove matching the sliding plate 20, and a first elastic member 34 is provided between the side of the sliding plate 20 away from the second gear 18 and the inner wall of the movable groove, so that the sliding plate 2 0 remains close to the second gear 18 without external force, and then drives the second rack 21 to be in a range that can mesh with the second gear 18; the movement of the frame 13 drives the second gear 18 to move relative to the second rack 21, and when the second rack 21 remains close to the second gear 18, that is, the second gear 18 can mesh and transmit when passing through the second rack 21; further, after the second gear 18 and the second rack 21 complete a one-way transmission, the second gear 18 rotates 180°; each filter plate 14 is in a coplanar state, corresponding to the two ends of the moving stroke of the first rack 16, and also corresponding to the two fixed positions switched by the second gear 18 driving the eccentric rod 19 to rotate 180°.

[0050] As a preferred technical solution of this embodiment, a slide groove 22 is provided on the inner wall of the second shell 2, and a slider 23 fixedly connected to the frame 13 is elastically and movably provided in the slide groove 22. A clamping assembly and an offset assembly are provided on the slider 23. The clamping assembly is used to limit the movement of the scraper 5 relative to the filter plate 14 and limit the unidirectional rotation of the scraper 5 after the scraper 5 abuts against the filter plate 14. A shovel block 24 for canceling the restriction of the scraper 5 by the clamping assembly is provided on the inner wall of the second shell 2. The offset assembly is used to drive the linkage frame 17 and the second rack 21 away from the second gear 18 when the clamping assembly restricts the scraper 5. Specifically, the slider 23 is arranged in the middle or near the middle of the side wall of the frame 13, and the slide groove 22 Corresponding to the setting of the slider 23, the slider 23 is set on both opposite sides of the frame 13; a second elastic member 35 is connected between the end of the slider 23 facing the outside and the inner wall of the slide groove 22, which can keep the slider 23 away from the outside, that is, the frame 13 remains close to the first shell 1; the clamping assembly is passively triggered, and when the telescopic rod 4 drives the scraper 5 to abut against the filter plate 14, the clamping assembly is triggered to clamp on the side of the scraper 5 away from the filter plate 14, thereby cooperating with the filter plate 14 to limit the scraper 5. At this time, the screw 9 continues to rotate in the same direction, which can drive the scraper 5 to rotate, and the rotation of the scraper 5 in this direction is not limited by the clamping assembly; because the second elastic member 35 hinders the movement of the frame 13, the clamping assembly After limiting the scraper wheel 5, it also hinders the scraper wheel 5 from being driven by the telescopic rod 4 to move back, and the resistance is greater than the resistance generated by the limiting component to the telescopic rod 4. Therefore, when the screw 9 is reversed, the screw 9 and the telescopic rod 4 rotate synchronously first. At this time, the direction in which the scraper wheel 5 is driven by the telescopic rod 4 is limited by the clamping component, and because the rotation restriction is rigid, the telescopic rod 4 begins to transmit thread feed with the reversed screw 9. Therefore, the telescopic rod 4 drives the scraper wheel 5 to move back, and the scraper wheel 5 drives the frame 13 to move as a whole; the shovel block 24 is fixedly arranged on the inner wall of the second shell 2, and when the frame 13 is driven by the above, the slider 23 drives the clamping component to approach the shovel block 24, and then the shovel block 24 can contact the clamping component. When the scraper 5 is assembled, the clamping of the clamping assembly on the scraper 5 is cancelled, and then the scraper 5 moves independently, the driving force on the frame 13 disappears, and the second elastic member 35 pushes the slider 23 to move back; the offset assembly is used to control the second gear 18 to engage or disengage with the second rack 21; when the scraper 5 abuts against the filter plate 14, it is restricted by the clamping assembly and interferes with the flipping of the filter plate 14. The setting of the offset assembly, when the scraper 5 is engaged with the clamping assembly, the offset assembly is triggered accordingly to drive the second rack 21 away from the second gear 18, that is, when the frame 13 moves toward the outside with the scraper 5, the second gear 18 and the second rack 21 just do not mesh and transmit, thereby avoiding interference;When the clamping assembly is freed from the clamping of the scraper wheel 5 by the shovel block 24, the scraper wheel 5 is separated from the frame 13, and the offset assembly stops driving the sliding plate 20. The sliding plate 20 moves back to a range where it can mesh with the second gear 18 under the elastic action of the first elastic member 34. At the same time, the frame 13 is moved back by the second elastic member 35, which can drive the second gear 18 to move relative to the second rack 21 to achieve meshing transmission, thereby realizing the flipping of each filter plate 14. In addition, at the beginning of the back movement of the frame 13, the second gear 18 and the second rack 21 have not yet started to mesh. After the frame 13 moves back a short distance, due to the elastic force, the frame 13 has a certain back movement speed, and this speed drives the second gear 18 to contact and mesh with the second rack 21, thereby generating a certain impact to trigger the vibration of the frame 13. The vibration is transmitted to the filter plate 14, which can shake off some of the attached materials, thereby improving the cleaning effect; then, the second gear 18 and the second rack 21 mesh and transmit, and the filter plate 14 turns the cleaned side to the side facing the room; further, the filter plates 14 are squeezed and sealed by the damping strips, which increases the resistance to the initial turning of the filter plates 14, thereby more easily and obviously triggering the above vibration. ;

[0051] As a preferred technical solution of this embodiment, the clamping assembly includes a retraction groove 25 provided on the slider 23, a clamping block 26 is elastically and movably provided in the retraction groove 25, an inclined surface is provided on the side of the clamping block 26 facing the outside and is wedge-matched with the shovel block 24, and the other side is provided with a plane parallel to the end face of the scraper wheel 5 facing the outside, and a clamping column 27 is fixedly provided, and a plurality of clamping grooves 28 matching the clamping column 27 are provided on the outer circumference of the scraper wheel 5. Specifically, a third elastic member 36 connected to the clamping block 26 is provided in the retraction groove 25, and the third elastic member 36 keeps pushing the clamping block 26 to extend out of the retraction groove 25; the movable direction of the clamping block 26 is provided along the radial direction of the scraper wheel 5; a gap is provided between the clamping block 26 and the frame 13, and the gap matches the axial width of the outer ring edge of the scraper wheel 5; the inclined surface of the clamping block 26 is provided, and when the telescopic rod 4 drives the scraper wheel 5 to approach the filter plate 14, the outer ring edge of the scraper wheel 5 The inclined surface of the card block 26 can be squeezed to pass through the card block 26, and then the card block 26 rebounds to be clamped on the side of the scraper wheel 5 facing the outside; the range where the shovel block 24 is located does not affect the continued return movement of the scraper wheel 5 after it is separated from the frame 13; the extension direction of the card column 27 is parallel to the axial direction of the scraper wheel 5; one of the edges of the card column 27 is chamfered, and a wedge-shaped extrusion occurs between it and the card groove 28 driven by the forward rotation of the scraper wheel 5 after it approaches and abuts against the filter plate 14, and a clamping limit occurs with the reverse rotation of the scraper wheel 5 away from the filter plate 14, thereby realizing the restriction of the unidirectional rotation of the scraper wheel 5, and when the reverse rotation of the scraper wheel 5 is limited, the screw rod 9 and the telescopic rod 4 are threadedly fed; in addition, when the card column 27 is squeezed with the card groove 28, the card block 26 is driven to move into the retraction groove 25, and during this process, the card block 26 does not leave the end face of one side of the scraper wheel 5 facing the outside, that is, the clamping limit is maintained. The clamping block 26 approaches the shovel block 24 to be squeezed and moved, so that when the clamping block 26 leaves the end surface of the scraper wheel 5 , the clamping block 26 also drives the clamping column 27 to leave the clamping groove 28 .

[0052] As the preferred technical solution of this embodiment, the offset assembly includes a stopper 29 movably arranged on the slider 23 between the frame 13 and the card block 26, the stopper 29 is fixedly connected to the linkage block 31 through a connecting rod 30, a linkage groove 32 matching the linkage block 31 is arranged on the sliding plate 20, one end of the stopper 29 extends out of the slider 23 and is provided with a synchronization groove 33 matching the card column 27, specifically, the movable direction of the stopper 29 is radially arranged along the scraper wheel 5 and is arranged horizontally; the connecting rod 30 is arranged vertically and moves freely in the side wall entity of the second shell 2; the linkage block 31 is arranged in the movable groove with the sliding plate 20, and the relative movement of the linkage block 31 in the linkage groove 32 is the same as the moving direction of the frame 13; the linkage block 31 can also move synchronously with the sliding plate 20 in the movable groove; under the action of the connecting rod 30 and the linkage block 31 connecting the sliding plate 20, the stopper 29 The first elastic member 34 is also acted upon to keep extending toward the center of the frame 13, and the extending length does not exceed the length of the extending end of the block 26; the synchronous groove 33 is set so that when the block 26 moves into the retraction groove 25, the synchronous groove 33 can be pushed by the card column 27 to drive the stop block 29 to move synchronously, thereby making that when the block 26 is squeezed and moved by the scraper wheel 5, the stop block 29 also moves synchronously with the block 26 to avoid the scraper wheel 5. After the scraper wheel 5 abuts against the filter plate 14, the block 26 elastically resets, and the stop block 29 abuts against the outside of the scraper wheel 5, thereby maintaining the return state, that is, the sliding plate 20 and the second rack 21 are driven by the connecting rod 30, the linkage block 31 and the linkage groove 32 to keep away from the second gear 18; then, when the scraper wheel 5 is separated from the frame 13, the stop block 29 is reset, and the second rack 21 can be meshed with the second gear 18 for transmission.

[0053] A fresh air air conditioning indoor unit includes a fresh air device, wherein the fresh air device is the fresh air device in the above embodiment.

[0054] 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 fresh air device, comprising a first shell (1) and a second shell (2), wherein a fan (3) is arranged in the first shell (1), one end of the second shell (2) is connected to the first shell (1), and the other end is used to connect to the outside, a two-way air duct is arranged in the first shell (1) and the second shell (2) along the axial direction of the fan (3), and a filter assembly is arranged in the second shell (2), characterized in that: Also includes: A telescopic rod (4) movably disposed in the second housing (2) and located on a side of the filter assembly facing the outside; A scraper wheel (5) is arranged at one end of the telescopic rod (4) pointing toward the filter assembly; A driving assembly, which is used to drive the telescopic rod (4) to move axially, and when the telescopic rod (4) drives the scraper wheel (5) to abut against the surface of the filter assembly, the telescopic rod (4) drives the scraper wheel (5) to rotate to scrape the attached matter on the surface of the filter assembly; The filter assembly comprises a frame (13) movably arranged in the second housing (2), a plurality of filter plates (14) closely arranged side by side are rotatably arranged in the frame (13), and a flip assembly for driving the filter plates (14) to rotate is arranged at both the upper and lower ends of the frame (13); The flip assembly comprises a first gear (15) coaxially connected to the rotating shaft of the filter plate (14); the first gear (15) is meshingly connected with a first rack (16); a linkage frame (17) is arranged at the end of the first rack (16); a second gear (18) is rotatably arranged on the frame (13); an eccentric rod (19) is fixedly arranged on the second gear (18) and is slidably connected to the linkage frame (17); the second gear (18) extends out of the side wall of the frame (13); a sliding plate (20) is elastically and movably arranged on the inner wall of the second shell (2); a second rack (21) matching the second gear (18) is arranged on one side of the sliding plate (20); a movable groove matching the sliding plate (20) is arranged on the inner wall of the second shell (2); a first elastic member (34) is arranged between the side of the sliding plate (20) away from the second gear (18) and the inner wall of the movable groove; The inner wall of the second shell (2) is provided with a slide groove (22), and a slider (23) fixedly connected to the frame (13) is elastically and movably provided in the slide groove (22), and a clamping assembly and an offset assembly are provided on the slider (23), and the clamping assembly is used to limit the movement of the scraper wheel (5) relative to the filter plate (14) and limit the unidirectional rotation of the scraper wheel (5) after the scraper wheel (5) abuts against the filter plate (14). The inner wall of the second shell (2) is provided with a shovel block (24) for canceling the restriction of the scraper wheel (5) by the clamping assembly, and the offset assembly is used to drive the linkage frame (17) and the second rack (21) away from the second gear (18) when the clamping assembly restricts the scraper wheel (5); a second elastic member (35) is connected between the end of the slider (23) facing the outside and the inner wall of the slide groove (22); the offset assembly is used to control the second gear (18) to fit or When the scraper (5) and the filter plate (14) are in contact with each other, the offset component is triggered accordingly by the restriction of the clamping component to drive the second rack (21) away from the second gear (18), that is, when the frame (13) moves toward the outside with the scraper (5), the second gear (18) and the second rack (21) just do not mesh with each other; and when the clamping component cancels the clamping of the scraper (5) by the action of the shovel block (24), the scraper (5) and the frame (13) are separated, and the offset component cancels the driving of the sliding plate (20), and the sliding plate (20) moves back to the range where it can mesh with the second gear (18) under the elastic action of the first elastic member (34). At the same time, the frame (13) is moved back by the action of the second elastic member (35), which can drive the second gear (18) to move relative to the second rack (21) to mesh with each other, thereby realizing the turning over of each filter plate (14).

2. The fresh air device according to claim 1, characterized in that: A bracket (6) is fixedly arranged inside the second shell (2), a sleeve (7) is rotatably arranged on the bracket (6), the sleeve (7) is movably sleeved outside the telescopic rod (4) and rotates synchronously with the telescopic rod (4), and a limit assembly for limiting the rotation of the sleeve (7) is arranged on the bracket (6).

3. The fresh air device according to claim 2, characterized in that: The driving assembly comprises a motor (8) mounted on a bracket (6); a screw rod (9) is coaxially connected to an output end of the motor (8); the screw rod (9) is coaxially threadedly connected to the telescopic rod (4); when the telescopic rod (4) is freely telescopic, the limiting assembly limits the rotation of the sleeve (7) to promote threaded feeding transmission between the screw rod (9) and the telescopic rod (4); and when the telescopic rod (4) is limited in telescopic movement, the limiting assembly cancels the restriction on the rotation of the sleeve (7) to promote the screw rod (9) to drive the telescopic rod (4) to rotate synchronously.

4. The fresh air device according to claim 3, characterized in that: The limiting assembly comprises a limiting bin (10) arranged on a bracket (6); one end of the sleeve (7) is coaxially connected to a first toothed disc (11) rotatably arranged in the limiting bin (10); and a second toothed disc (12) meshing with the first toothed disc (11) is elastically arranged in the limiting bin (10) along the axial direction of the screw rod (9).

5. The fresh air device according to claim 1, characterized in that: The clamping assembly comprises a retraction groove (25) arranged on a slider (23), a clamping block (26) being elastically and movably arranged in the retraction groove (25), a side of the clamping block (26) being provided with an inclined surface facing the outside and being wedge-matched with the shovel block (24), and the other side being provided with a plane parallel to the end surface of the scraper wheel (5) facing the outside and being fixedly provided with a clamping column (27), and a plurality of clamping grooves (28) matching with the clamping column (27) being provided on the outer circumference of the scraper wheel (5).

6. The fresh air device according to claim 5, characterized in that: The offset assembly comprises a stopper (29) movably arranged between the frame (13) and the clamping block (26) on the slider (23); the stopper (29) is fixedly connected to a linkage block (31) via a connecting rod (30); a linkage groove (32) matching the linkage block (31) is arranged on the sliding plate (20); one end of the stopper (29) extends out of the slider (23) and is provided with a synchronization groove (33) matching the clamping column (27).

7. A fresh air air conditioner indoor unit, comprising a fresh air device, characterized in that: The fresh air device is the fresh air device according to any one of claims 1 to 6.

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