An easily washable and replaceable fresh air filter

Abstract

This application relates to the technical field of filter devices, and specifically discloses an easily replaceable fresh air filter, which includes a main box body, a sub-box body and a fresh air filtering mechanism. A fresh air inlet pipe and an exhaust gas outlet pipe are installed on one end face of the main box body, and a fresh air outlet pipe and an exhaust gas inlet pipe are installed on the other end face of the main box body; the fresh air filtering mechanism is installed in the main box body, and the fresh air filtering mechanism is used for exchanging indoor and outdoor air; the sub-box body is installed between the main box body and the exhaust gas inlet pipe, and a vertical column is connected in the sub-box body; two end-face-aligned partition plates are rotatably connected to the circumferential surface of the column, and the partition plates divide the sub-box body into an exhaust gas chamber and a soot chamber. The exhaust gas chamber and the exhaust gas inlet pipe are on the same path and communicate with the main box body; a soot treatment mechanism for treating soot and flames is installed in the soot chamber; a driving mechanism for driving the two partition plates to rotate around the column is installed on the main box body. This application has the effect of improving the use safety of the filter.

Description

Technical Field

[0001] The present invention relates to the technical field of filter devices, and more particularly to an easily replaceable fresh air filter. Background Art

[0002] The fresh air filter is a core component in the fresh air system, mainly used to purify the air introduced from the outside, ensuring that the air sent into the room is clean and healthy; furthermore, the dirty air in the room is discharged to the outside.

[0003] In related technologies, the filter generates negative pressure through a fan to allow outside air to enter the filter. The air is filtered step by step and then discharged into the room after heat exchange through a total heat exchange core. The filter then uses another fan to discharge the dirty air in the room to the outside after heat exchange through the total heat exchange core, achieving air replacement. In the extreme conditions of filter use, such as in the event of a fire in the room, the most fatal thing in an indoor fire is usually the large amount of smoke and dust generated. If this smoke and dust can be discharged to the outside in time, it will increase the survival probability of indoor personnel. During the use of the filter, the filter can extract the indoor air to the outside through a pipe network. However, during a fire, the generated smoke and dust are often accompanied by flames, and these flames will enter the filter along the pipe network. These flames are likely to ignite the components inside the filter, and the filter screen inside the filter has poor flame retardancy, easily causing a fire in the filter and being unsafe. Summary of the Invention

[0004] In order to improve the safety of filter use, the present application provides an easily replaceable fresh air filter.

[0005] An easily replaceable fresh air filter provided by the present application adopts the following technical solution:

[0006] An easily replaceable fresh air filter includes a main box body, a sub-box body, and a fresh air filtering mechanism. A fresh air inlet pipe and an exhaust gas outlet pipe are installed on one end face of the main box body, and a fresh air outlet pipe and an exhaust gas inlet pipe are installed on the other end face of the main box body; the fresh air filtering mechanism is installed inside the main box body and is used for exchanging indoor and outdoor air; the sub-box body is installed between the main box body and the exhaust gas inlet pipe, and a vertical column is connected inside the sub-box body; two end-aligned partition plates are rotatably connected to the circumferential surface of the column, and the partition plates divide the sub-box body into an exhaust gas chamber and a smoke and dust chamber. The exhaust gas chamber and the exhaust gas inlet pipe are on the same path and communicate with the main box body; a smoke and dust treatment mechanism for treating smoke and dust and flames is installed in the smoke and dust chamber; a driving mechanism for driving the two partition plates to rotate around the column is installed on the main box body.

[0007] Optionally, the soot treatment mechanism includes an inner semi-circular plate, an outer semi-circular plate, a metal filter screen, and a porous heat-insulating and flame-retardant brick; two vertically arranged first guide bars are connected to the outer peripheral surface of the inner semi-circular plate and the inner peripheral surface of the outer semi-circular plate. One side edge of the metal filter screen is inserted between the two first guide bars of the inner semi-circular plate, and the other side edge of the metal filter screen is inserted between the two first guide bars of the outer semi-circular plate; two vertically arranged second guide bars are connected to the outer peripheral surface of the inner semi-circular plate and the inner peripheral surface of the outer semi-circular plate. One side edge of the porous heat-insulating and flame-retardant brick is inserted between the two second guide bars of the inner semi-circular plate, and the other side edge of the porous heat-insulating and flame-retardant brick is inserted between the two second guide bars of the outer semi-circular plate. The porous heat-insulating and flame-retardant brick is located on the side of the metal filter screen away from the exhaust gas inlet pipe.

[0008] Optionally, one end of a first semi-circular plate and one end of a second semi-circular plate are respectively connected to the sides of the two partition plates close to the inner semi-circular plate; the outer side surface of the first semi-circular plate is attached to the inner side surface of the inner semi-circular plate, and the outer side surface of the second semi-circular plate is attached to the inner side surface of the first semi-circular plate.

[0009] Optionally, a lifting plate is installed at the top of the metal filter screen. Both ends of the bottom surface of the lifting plate are connected with first guide plates. The first guide plates are located on the side of the metal filter screen away from the porous heat-insulating and flame-retardant brick, and the first guide plates are attached to the sides of the first guide bars away from the metal filter screen; a metal mesh brush is arranged on the side of the metal filter screen close to the first guide plate. The metal mesh brush is used to clean the mesh surface of the metal filter screen; both ends of the metal mesh brush are connected with sliding blocks, and guide grooves for the two sliding blocks to slide are arranged in both first guide plates; a lifting mechanism for driving the metal mesh brush to move up and down is installed on the metal filter screen.

[0010] Optionally, the lifting mechanism includes a lightweight metal rotating plate, a first traction rope, a second traction rope, a first guide wheel, a second guide wheel, a winding disc, and a counterweight block; both ends of the bottom surface of the lifting plate are connected with second guide plates. The second guide plates are located on one side of the metal mesh brush; both ends of one side edge of the rotating plate are rotatably connected between the two second guide plates; the first guide wheel is rotatably connected to the bottom end of the second guide plate, and the second guide wheel is rotatably connected to the top surface of the lifting plate; the winding disc is rotatably connected to the top surface of the lifting plate. The winding disc is provided with an annular first winding groove and an annular second winding groove. The diameter of the first winding groove is smaller than that of the second winding groove; one end of the first traction rope is connected to the bottom edge of the rotating plate, and the other end of the first traction rope is connected to the inner wall of the first winding groove. The first traction rope bypasses the bottom surface of the first guide wheel and bypasses between each pair of two second guide wheels; one end of the second traction rope is connected to the top surface of the metal mesh brush, and the other end of the second traction rope is connected to the inner wall of the second winding groove; the counterweight block is connected to the side surface of the metal mesh brush.

[0011] Optionally, a dust discharge port is provided at the bottom surface of the auxiliary box body. The dust discharge port is located below the metal mesh brush. The inner wall of the dust discharge port is connected with a first guiding plate and a second guiding plate. The first guiding plate is located below the first guiding board. The second guiding plate is located on the side of the first guiding plate away from the metal filter screen. The top end of the second guiding plate extends out of the bottom surface of the main box body and bends towards the metal filter screen. The bottom edge of the first guiding plate inclines towards the second guiding plate.

[0012] Optionally, the driving mechanism includes a driving motor, a screw rod, a transmission plate, a push-pull plate and a pushing plate; two pushing plates are provided. The two pushing plates are respectively connected to the sides of the two partition plates close to the exhaust gas chamber and are symmetrically arranged with respect to the column. A kidney-shaped hole is provided in the pushing plate; the driving motor is installed on the top surface of the auxiliary box body. The output shaft of the driving motor faces away from the pushing plate. The end of the screw rod is connected to the output shaft of the driving motor. The transmission plate is sleeved on the circumferential surface of the screw rod. The transmission plate is located on the side surface of the auxiliary box body. Two push-pull plates are provided. The two push-pull plates are respectively connected to both ends of the side surface of the transmission plate close to the partition plate. The ends of the two push-pull plates extend into the exhaust gas chamber and respectively extend to the bottom surfaces of the two pushing plates. A positioning pin for extending into the kidney-shaped hole is connected to the top surface of the end of the push-pull plate.

[0013] Optionally, a first pick-up and placement port is installed on the top surface of the auxiliary box body. The first pick-up and placement port communicates with the soot chamber. The first pick-up and placement port is aligned with the lifting plate. A handle is connected to the top surface of the lifting plate. A first cover plate is installed on the top surface of the first pick-up and placement port.

[0014] Optionally, an opening is provided on the top surface of the auxiliary box body. The opening is aligned with the porous heat-insulating and flame-retardant brick. A second cover plate is provided in the opening. A grasping port for hand-held is provided on the top surface of the porous heat-insulating and flame-retardant brick.

[0015] Optionally, a first partition board is arranged on the inner wall of the main box body. The first partition board divides the main box body into a filtering chamber and a fan chamber. The fan chamber is communicated with the fresh air inlet pipe and the waste gas inlet pipe. A second partition board is arranged on the inner wall of the fan chamber. The second partition board divides the fan chamber into a first chamber and a second chamber. The first chamber is communicated with the waste gas outlet pipe. The second chamber is communicated with the fresh air inlet pipe. The fresh air filtering mechanism includes a first fan, a second fan, a total heat exchange core and a filtering component. The first fan is installed in the first chamber and is communicated with the waste gas outlet pipe. The second fan is installed in the second chamber and is communicated with the fresh air outlet pipe. The total heat exchange core is installed in the filtering chamber, and the top surface and the bottom surface of the total heat exchange core are attached to the inner wall of the main box body. A first blocking board is installed on the inner wall of the filtering chamber. One side edge of the first blocking board is attached to the side edge of the total heat exchange core, and the other side edge of the first blocking board is located above the auxiliary box body. A second blocking board is installed in the filtering chamber. One side edge of the second blocking board is attached to the other side edge of the total heat exchange core, and the other side edge of the second blocking board is bent and connected to the inner wall of the main box body and is located above the fresh air inlet pipe. A first notch for communicating the first chamber with the space above the total heat exchange core and the second blocking board is arranged on the first partition board. A second notch for communicating the second chamber with the space above the total heat exchange core and the first blocking board is arranged on the first partition board. The filtering component is installed below the second blocking board and is opposite to the fresh air inlet pipe.

[0016] In summary, the present application includes at least one of the following beneficial technical effects:

[0017] 1. When the filter is in normal use, indoor waste gas is sucked into the waste gas inlet pipe under negative pressure, and then flows into the main box body through the waste gas chamber. The fresh air filtering mechanism discharges the waste gas to the outside through the waste gas outlet pipe. When a fire occurs, the driving mechanism drives the two partition boards to rotate towards the waste gas chamber, so that the ends of the two partition boards are pressed against the inner wall of the waste gas chamber. The partition boards block the waste gas chamber, so that the smoke chamber is communicated with the main box body and the waste gas inlet pipe. The main box body generates negative pressure under the action of the fresh air filtering mechanism, sucks indoor smoke into the waste gas inlet pipe, and then the smoke enters the smoke chamber. The smoke treatment mechanism treats the smoke and flames, so that the treated waste gas is discharged into the main box body again. The treated smoke is not easy to block the filter screen in the fresh air filtering mechanism, nor is it easy to ignite the components in the fresh air filtering mechanism, playing a role in flame retardance, thereby improving the safety of filter use;

[0018] 2. When the smoke enters the smoke chamber, the metal filter screen blocks the particulate matter in the smoke. The metal filter screen filters the smoke and blocks the flames in the smoke. The smoke passing through the metal filter screen then passes through the porous heat-insulating and flame-retardant bricks. The porous heat-insulating and flame-retardant bricks block the heat and flames in the smoke, further reducing the possibility of smoke and flames entering the main box body, thereby protecting the filter;

[0019] 3. After the metal filter screen filters the soot multiple times, a large amount of soot accumulates on the metal filter screen, blocking the metal filter screen and affecting the discharge of flue gas from the metal filter screen; the metal mesh brush is driven by a driving mechanism to lift and lower, and the metal mesh brush sweeps the soot accumulated on the surface area of the metal filter screen, so that the metal filter screen remains unobstructed during the continuous filtering of soot;

[0020] 4. When it is necessary to clean the metal filter screen and its related components, open the first cover plate, lift the lifting plate upward through the handle, and the lifting plate pulls the metal filter screen out of the auxiliary box body, which is convenient for replacement and cleaning;

[0021] 5. When it is necessary to replace and clean the porous heat-insulating and flame-retardant bricks, open the second cover plate, and lift the porous heat-insulating and flame-retardant bricks out of the auxiliary box body through the grab, so that they can be cleaned. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of the filter in the embodiment of the present application;

[0023] Figure 2 is an exploded structural diagram of the filter in the embodiment of the present application;

[0024] Figure 3 is Figure 2 an enlarged structural diagram of part A in

[0025] Figure 4 is an internal structural diagram of the auxiliary box body in the embodiment of the present application;

[0026] Figure 5 is a schematic structural diagram of the metal filter screen in the embodiment of the present application;

[0027] Figure 6 is Figure 5 an enlarged structural diagram of part B in

[0028] Figure 7 is another perspective structural diagram of the metal filter screen in the embodiment of the present application;

[0029] Figure 8 is Figure 7 an enlarged structural diagram of part C in

[0030] Figure 9 is an internal structural diagram of the main box body in the embodiment of the present application;

[0031] Figure 10 is a schematic diagram of the air flow structure of the total heat exchange core in the embodiment of the present application;

[0032] Figure 11 is a partial structural diagram of the main box body in the embodiment of the present application.

[0033] Description of the Reference Numerals:

[0034] 1. Main box body; 101. Filter chamber; 102. Fan chamber; 103. First chamber; 104. Second chamber; 105. First installation opening; 106. Second installation opening; 11. Fresh air inlet pipe; 12. Exhaust gas outlet pipe; 13. Fresh air outlet pipe; 14. Exhaust gas inlet pipe; 15. First partition board; 151. First notch; 152. Second notch; 16. Second partition board; 17. First baffle plate; 18. Second baffle plate; 19. First door panel; 110. First pressing block; 111. Second door panel; 112. Second pressing block; 2. Sub-box body; 201. Exhaust gas chamber; 202. Smoke and dust chamber; 21. Column; 211. Partition board; 212. First semi-circular arc plate; 213. Second semi-circular arc plate; 22. First pick-up and placement opening; 221. First cover plate; 23. Second cover plate; 24. Ash discharge opening; 25. First guiding plate; 26. Second guiding plate; 3. Fresh air filtering mechanism; 31. First fan; 32. Second fan; 33. Total heat exchange core; 34. Filter assembly; 341. Primary filter screen; 342. Intermediate filter screen; 343. High-efficiency filter screen; 344. Track; 4. Driving mechanism; 41. Driving motor; 42. Screw rod; 43. Transmission plate; 44. Push-pull plate; 441. Positioning pin; 45. Pushing plate; 451. Kidney-shaped hole; 5. Smoke and dust treatment mechanism; 51. Inner semi-circular arc plate; 511. First guiding strip; 512. Second guiding strip; 52. Outer semi-circular arc plate; 53. Metal filter screen; 54. Porous heat-insulating and flame-retardant brick; 541. Gripping opening; 6. Lifting plate; 61. First guiding plate; 611. Guiding groove; 62. Metal mesh brush; 621. Sliding block; 63. Lifting mechanism; 631. Rotating plate; 632. First traction rope; 633. Second traction rope; 634. First guiding wheel; 635. Second guiding wheel; 636. Winding disc; 6361. First winding groove; 6362. Second winding groove; 637. Counterweight block; 64. Second guiding plate; 65. Handle. Detailed implementation manners

[0035] The following will Figure 1-11 further elaborate on this application in detail.

[0036] An embodiment of this application discloses an easily replaceable fresh air filter. Refer to Figure 1-11, the filter includes a main box body 1, a sub-box body 2 and a fresh air filtering mechanism 3. One end face of the main box body 1 is provided with a fresh air inlet pipe 11 and an exhaust gas outlet pipe 12, and the other end face of the main box body 1 is provided with a fresh air outlet pipe 13 and an exhaust gas inlet pipe 14; the fresh air filtering mechanism 3 is installed in the main box body 1 and is used for exchanging indoor and outdoor air; the sub-box body 2 is installed between the main box body 1 and the exhaust gas inlet pipe 14, and a vertical column 21 is vertically connected in the sub-box body 2; two end-face-aligned partition plates 211 are rotatably connected to the peripheral surface of the column 21, and the partition plates 211 divide the sub-box body 2 into an exhaust gas chamber 201 and a soot chamber 202. The exhaust gas chamber 201 and the exhaust gas inlet pipe 14 are on the same path and communicate with the main box body 1; a soot treatment mechanism 5 for treating soot and flames is installed in the soot chamber 202; a driving mechanism 4 for driving the two partition plates 211 to rotate around the column 21 is installed on the main box body 1.

[0037] When the filter is in normal use, indoor exhaust gas is sucked into the exhaust gas inlet pipe 14 under negative pressure, then flows into the main box body 1 through the exhaust gas chamber 201, and the fresh air filtering mechanism 3 discharges the exhaust gas to the outside through the exhaust gas outlet pipe 12; when a fire occurs, the driving mechanism 4 drives the two partition plates 211 to rotate towards the exhaust gas chamber 201, so that the ends of the two partition plates 211 are pressed against the inner wall of the exhaust gas chamber 201, and the partition plates 211 block the exhaust gas chamber 201, making the soot chamber 202 communicate with the main box body 1 and the exhaust gas inlet pipe 14. The main box body 1 generates negative pressure under the action of the fresh air filtering mechanism 3, sucks indoor soot into the exhaust gas inlet pipe 14, then the soot enters the soot chamber 202, and the soot treatment mechanism 5 treats the soot and flames, so that the treated exhaust gas is discharged into the main box body 1 again, making the treated soot not easily block the filter screen in the fresh air filtering mechanism 3 and not easily ignite the components in the fresh air filtering mechanism 3, playing a role in flame retardancy, thereby improving the safety of filter use.

[0038] The soot treatment mechanism 5 includes an inner semi-circular arc plate 51, an outer semi-circular arc plate 52, a metal filter screen 53 and a porous heat-insulating and flame-retardant brick 54; two vertically arranged first guide strips 511 are connected to the outer peripheral surface of the inner semi-circular arc plate 51 and the inner peripheral surface of the outer semi-circular arc plate 52. One side edge of the metal filter screen 53 is inserted between the two first guide strips 511 of the inner semi-circular arc plate 51, and the other side edge of the metal filter screen 53 is inserted between the two first guide strips 511 of the outer semi-circular arc plate 52; two vertically arranged second guide strips 512 are connected to the outer peripheral surface of the inner semi-circular arc plate 51 and the inner peripheral surface of the outer semi-circular arc plate 52. One side edge of the porous heat-insulating and flame-retardant brick 54 is inserted between the two second guide strips 512 of the inner semi-circular arc plate 51, and the other side edge of the porous heat-insulating and flame-retardant brick 54 is inserted between the two second guide strips 512 of the outer semi-circular arc plate 52. The porous heat-insulating and flame-retardant brick 54 is located on the side of the metal filter screen 53 away from the exhaust gas inlet pipe 14.

[0039] When the soot enters the soot chamber 202, the metal filter screen 53 blocks the fine particulate matter in the soot. The metal filter screen 53 filters the soot and blocks the flames in the soot. The soot passing through the metal filter screen 53 then passes through the porous heat-insulating and flame-retardant bricks 54, which block the heat and flames in the soot, further reducing the possibility of soot and flames entering the main box body 1, thereby protecting the filter.

[0040] One end of the first semi-circular arc plate 212 and one end of the second semi-circular arc plate 213 are respectively connected to the sides of the two partition plates 211 close to the inner semi-circular arc plate 51; the outer side of the first semi-circular arc plate 212 is attached to the inner side of the inner semi-circular arc plate 51, and the outer side of the second semi-circular arc plate 213 is attached to the inner side of the first semi-circular arc plate 212.

[0041] When the partition plate 211 rotates, the first semi-circular arc plate 212 and the second semi-circular arc plate 213 rotate out from the inside of the inner semi-circular arc plate 51 to compensate for the gaps at both ends of the inner semi-circular arc plate 51 and block the flow of soot between the inner semi-circular arc plate 51 and the partition plate 211.

[0042] A lifting plate 6 is installed at the top of the metal filter screen 53. Both ends of the bottom surface of the lifting plate 6 are connected to a first guide plate 61. The first guide plate 61 is located on the side of the metal filter screen 53 away from the porous heat-insulating and flame-retardant bricks 54, and the first guide plate 61 is attached to the side of the first guide strip 511 away from the metal filter screen 53; a metal mesh brush 62 is arranged on the side of the metal filter screen 53 close to the first guide plate 61, and the metal mesh brush 62 is used to clean the mesh surface of the metal filter screen 53; both ends of the metal mesh brush 62 are connected to sliding blocks 621, and guide grooves 611 for the two sliding blocks 621 to slide are arranged in both first guide plates 61; a lifting mechanism 63 for driving the metal mesh brush 62 to move up and down is installed on the metal filter screen 53.

[0043] After the metal filter screen 53 filters the soot multiple times, a large amount of soot accumulates on the metal filter screen 53, clogging the metal filter screen 53 and affecting the discharge of flue gas from the metal filter screen 53; the driving mechanism 4 drives the metal mesh brush 62 to lift, and the metal mesh brush 62 sweeps the soot accumulated on the surface of the metal filter screen 53, so that the metal filter screen 53 remains unobstructed during the continuous filtration of soot.

[0044] The lifting mechanism 63 includes a lightweight metal rotating plate 631, a first towing rope 632, a second towing rope 633, a first guide pulley 634, a second guide pulley 635, a winding disc 636, and a counterweight 637; both ends of the bottom surface of the lifting plate 6 are connected with second guide plates 64. The second guide plates 64 are located on one side of the metal mesh brush 62, and the second guide plates 64 are attached to the side surface of the first guide strip 511 away from the metal filter screen 53; both ends of one side edge of the rotating plate 631 are rotatably connected between the two second guide plates 64, and the rotating plate 631 is located at the middle position of the metal filter screen 53; there are two first guide pulleys 634, and the two first guide pulleys 634 are respectively rotatably connected to the side surfaces of the bottoms of the second guide plates 64 away from the metal filter screen 53; there are two pairs of second guide pulleys 635, and the two pairs of second guide pulleys 635 are respectively rotatably connected to the top surfaces of both ends of the lifting plate 6, and the two second guide pulleys 635 in each pair are arranged vertically; there are two winding discs 636, and the two winding discs 636 are respectively rotatably connected to both ends of the top surface of the lifting plate 6. The winding disc 636 is provided with an annular first winding groove 6361 and an annular second winding groove 6362, and the diameter of the first winding groove 6361 is smaller than that of the second winding groove 6362; there are two first towing ropes 632, and one ends of the two first towing ropes 632 are respectively connected to both ends of the bottom edge of the rotating plate 631, and the other ends of the two first towing ropes 632 are respectively connected to the inner walls of the first winding groove 6361. The first towing rope 632 bypasses from the bottom surface of the first guide pulley 634, and the first towing rope 632 bypasses between the two second guide pulleys 635 in each pair; there are two second towing ropes 633, and one ends of the two second towing ropes 633 are respectively connected to both ends of the top surface of the metal mesh brush 62, and the other ends of the two second towing ropes 633 are respectively connected to the inner walls of the second winding groove 6362; the counterweight 637 is connected to the side surface of the metal mesh brush 62; the diameter of the first winding groove 6361 of the winding disc 636 close to the outer semi-circular plate 52 is larger than the diameter of the first winding groove 6361 of the winding disc 636 away from the outer semi-circular plate 52.

[0045] When the soot passes through the metal filter screen 53, the air flow will blow the rotating plate 631, and the rotating plate 631 will rotate by a certain angle. The bottom edge of the rotating plate 631 drives the first traction rope 632, and the first traction rope 632 drives the winding disc 636 to rotate through the first guide wheel 634 and the second guide wheel 635. The winding disc 636 releases the first traction rope 632 in the first winding groove 6361, and the winding disc 636 winds the second traction rope 633 into the second winding groove of the winding disc 636. The second traction rope 633 drives the metal mesh brush 62 to rise to the lifting plate 6; when the metal filter screen 53 is blocked, the thrust on the rotating plate 631 decreases at this time, and the rotating plate 631 rotates downward. At this time, under the action of the counterweight 637 of the metal mesh brush 62, the metal mesh brush 62 moves downward to clean the metal filter screen 53. The second winding groove 6362 releases the second traction rope 633, and the first winding groove 6361 winds the first traction rope 632; after the metal filter screen 53 becomes unobstructed, the above operation is performed again to realize the automatic cleaning of the metal filter screen 53.

[0046] The bottom surface of the auxiliary box body 2 is provided with an ash discharge port 24. The ash discharge port 24 is located below the metal mesh brush 62. The inner wall of the ash discharge port 24 is connected with a first guide plate 25 and a second guide plate 26. The first guide plate 25 is located below the first guide plate 61, and the second guide plate 26 is located on the side of the first guide plate 25 away from the metal filter screen 53. The top end of the second guide plate 26 extends out of the bottom surface of the main box body 1 and bends towards the metal filter screen 53. The bottom edge of the first guide plate 25 inclines towards the second guide plate 26; after the metal mesh brush 62 brushes down the soot, the soot is discharged to the outside of the auxiliary box body 2 through the ash discharge port 24 under the action of the first guide plate 25 and the second guide plate 26.

[0047] The driving mechanism 4 includes a driving motor 41, a screw 42, a transmission plate 43, a push-pull plate 44 and a push plate 45; two push plates 45 are provided, and the two push plates 45 are respectively connected to the sides of the two partition plates 211 close to the exhaust gas chamber 201 and are symmetrically arranged with respect to the column 21. A waist-shaped hole 451 is provided in the push plate 45; the driving motor 41 is installed on the top surface of the auxiliary box body 2, the output shaft of the driving motor 41 faces away from the push plate 45, the end of the screw 42 is connected to the output shaft of the driving motor 41, the transmission plate 43 is sleeved on the circumferential surface of the screw 42, the transmission plate 43 is located on the side surface of the auxiliary box body 2, two push-pull plates 44 are provided, and the two push-pull plates 44 are respectively connected to both ends of the side surface of the transmission plate 43 close to the partition plate 211. The ends of the two push-pull plates 44 extend into the exhaust gas chamber 201 and respectively extend to the bottom surfaces of the two push plates 45. A positioning pin 441 for extending into the waist-shaped hole 451 is connected to the top surface of the end of the push-pull plate 44.

[0048] When it is necessary to drive the partition plate 211 to rotate, the driving motor 41 drives the screw rod 42 to rotate. The screw rod 42 drives the transmission plate 43 to move, the transmission plate 43 drives the push-pull plate 44 to move, the push-pull plate 44 drives the pushing plate 45 to move through the positioning pin 441, and the pushing plate 45 drives the partition plate 211 to move; the partition plate 211 can be switched arbitrarily to achieve the arbitrary switching between the waste gas chamber 201 or the dust chamber 202, the main box body 1 and the waste gas inlet pipe 14.

[0049] A first pick-up and placement opening 22 is installed on the top surface of the secondary box body 2. The first pick-up and placement opening 22 communicates with the dust chamber 202. The first pick-up and placement opening 22 is aligned with the lifting plate 6. A handle 65 is connected to the top surface of the lifting plate 6. A first cover plate 221 is installed on the top surface of the first pick-up and placement opening 22; when it is necessary to clean the metal filter screen 53 and its related components, the first cover plate 221 is opened, and the lifting plate 6 is lifted upward through the handle 65. The lifting plate 6 pulls the metal filter screen 53 out of the secondary box body 2, which is convenient for replacement and cleaning.

[0050] An opening is provided on the top surface of the secondary box body 2. The opening is aligned with the porous heat-insulating and flame-retardant brick 54. A second cover plate 23 is arranged in the opening. A grasping opening 541 for hand-held is arranged on the top surface of the porous heat-insulating and flame-retardant brick 54; when it is necessary to replace and clean the porous heat-insulating and flame-retardant brick 54, the second cover plate 23 is opened, and the porous heat-insulating and flame-retardant brick 54 is lifted out of the secondary box body 2 through the grasping opening 541, so that it can be cleaned.

[0051] The inner wall of the main box body 1 is provided with a first partition plate 15. The first partition plate 15 divides the main box body 1 into a filtering chamber 101 and a blower chamber 102. The blower chamber 102 is communicated with the fresh air inlet pipe 11 and the waste gas inlet pipe 14. The inner wall of the blower chamber 102 is provided with a second partition plate 16. The second partition plate 16 divides the blower chamber 102 into a first chamber 103 and a second chamber 104. The first chamber 103 is communicated with the waste gas outlet pipe 12. The second chamber 104 is communicated with the fresh air inlet pipe 11. The fresh air filtering mechanism 3 includes a first blower 31, a second blower 32, a total heat exchange core 33 and a filtering component 34. The first blower 31 is installed in the first chamber 103 and the first blower 31 is communicated with the waste gas outlet pipe 12. The second blower 32 is installed in the second chamber 104 and the second blower 32 is communicated with the fresh air outlet pipe 13. The total heat exchange core 33 is installed in the filtering chamber 101. The top surface and the bottom surface of the total heat exchange core 33 are attached to the inner wall of the main box body 1. A first baffle 17 is installed on the inner wall of the filtering chamber 101. One side edge of the first baffle 17 is attached to the side edge of the total heat exchange core 33. The other side edge of the first baffle 17 is located above the auxiliary box body 2. A second baffle 18 is installed in the filtering chamber 101. One side edge of the second baffle 18 is attached to the other side edge of the total heat exchange core 33. The other side edge of the second baffle 18 is bent and connected to the inner wall of the main box body 1 and is located above the fresh air inlet pipe 11. The first partition plate 15 is provided with a first notch 151 for communicating the first chamber 103 with the space above the total heat exchange core 33 and the second baffle 18. The first partition plate 15 is provided with a second notch 152 for communicating the second chamber 104 with the space above the total heat exchange core 33 and the first baffle 17. The filtering component 34 is installed below the second baffle 18 and is directly opposite to the fresh air inlet pipe 11.

[0052] When the second blower 32 operates to generate negative pressure, the air flow enters below the second baffle 18 through the fresh air inlet pipe 11. The filtering component 34 filters the air flow. The filtered air flow enters the lower left of the total heat exchange core 33. After the air flow is temperature-adjusted by the total heat exchange core 33, it flows out from the upper right of the total heat exchange core 33, flows to above the first baffle 17, and then enters the second chamber 104 through the second notch 152 and is discharged into the room through the fresh air outlet pipe 13. When the first blower 31 operates to generate negative pressure, the waste gas inlet pipe 14 introduces waste gas. The waste gas enters below the right of the first baffle 17. After heat exchange through the total heat exchange core 33, the waste gas flows to the upper left of the total heat exchange core 33, then flows to above the second baffle 18. The waste gas enters the first chamber 103 through the first notch 151. The first blower 31 discharges the waste gas from the waste gas outlet pipe 12 to the outside.

[0053] A first mounting opening 105 is provided on the side of the main cabinet 1, and the first mounting opening 105 is aligned with the filter assembly 34; the filter assembly 34 includes a primary filter screen 341, a medium - efficiency filter screen 342, a high - efficiency filter screen 343, and a track 344; there are two tracks 344, one of the tracks 344 is installed on the bottom surface of the second baffle 18, and the other track 344 is installed on the bottom surface of the filter chamber 101. The primary filter screen 341, the medium - efficiency filter screen 342, and the high - efficiency filter screen 343 are all slidably installed between the two tracks 344; a first door panel 19 is hinged on the side of the main cabinet 1, and the first door panel 19 seals the first mounting opening 105. Two first pressing blocks 110 that press the side of the first door panel 19 are rotatably connected to the side of the main cabinet 1.

[0054] A second mounting opening 106 is provided on the side of the main cabinet 1, and the second mounting opening 106 is aligned with the total heat exchange core 33; a second door panel 111 is sealed on the side of the main cabinet 1, and the second door panel 111 covers the second mounting opening 106. Four second pressing blocks 112 are rotatably connected to the side of the main cabinet 1, and through - holes for the second pressing blocks 112 to pass through are provided on the second door panel 111.

[0055] When it is necessary to wash and replace the filter assembly 34, turn the first pressing block 110 to open the first door panel 19, and the filter assembly 34 can be removed, and then the filter assembly 34 can be cleaned and replaced; when it is necessary to clean and replace the total heat exchange core 33, turn the second pressing block 112 to align with the through - hole, and then the second door panel 111 can be removed, the total heat exchange core 33 can be taken out, and then the total heat exchange core 33 can be cleaned and replaced.

[0056] The implementation principle of the easy - to - wash and replace fresh - air filter in the embodiment of the present application is as follows: When the filter is in normal use, indoor waste gas is inhaled into the waste - gas intake pipe 14 under negative pressure, and then flows into the main cabinet 1 through the waste - gas chamber 201. The fresh - air filtering mechanism 3 discharges the waste gas to the outside through the waste - gas outlet pipe 12; when a fire occurs, the driving mechanism 4 drives the two partition plates 211 to rotate towards the waste - gas chamber 201, so that the ends of the two partition plates 211 are pressed against the inner wall of the waste - gas chamber 201. The partition plates 211 block the waste - gas chamber 201, making the smoke chamber 202 communicate with the main cabinet 1 and the waste - gas intake pipe 14. The main cabinet 1 generates negative pressure under the action of the fresh - air filtering mechanism 3, inhaling indoor smoke into the waste - gas intake pipe 14, and then the smoke enters the smoke chamber 202. The smoke - treatment mechanism 5 treats the smoke and flames, so that the treated waste gas is discharged back into the main cabinet 1. In this way, the treated smoke is not easy to block the filter screen in the fresh - air filtering mechanism 3, nor is it easy to ignite the components in the fresh - air filtering mechanism 3, playing a role in flame retardancy, and thus improving the safety of filter use.

[0057] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, all equivalent changes made according to the structure, shape and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. An easily washable and replaceable fresh air filter, characterized in that: It includes a main box body (1), a sub-box body (2), and a fresh air filtering mechanism (3). One end face of the main box body (1) is provided with a fresh air inlet pipe (11) and an exhaust gas outlet pipe (12), and the other end face of the main box body (1) is provided with a fresh air outlet pipe (13) and an exhaust gas inlet pipe (14); the fresh air filtering mechanism (3) is installed inside the main box body (1), and the fresh air filtering mechanism (3) is used to exchange indoor and outdoor air; the sub-box body (2) is installed between the main box body (1) and the exhaust gas inlet pipe (14), and a vertical column (21) is vertically connected inside the sub-box body (2); two end-face-aligned partition plates (211) are rotatably connected to the peripheral surface of the vertical column (21), and the partition plates (211) divide the sub-box body (2) into an exhaust gas chamber (201) and a soot chamber (202), and the exhaust gas chamber (201) and the exhaust gas inlet pipe (14) are on the same path and communicate with the main box body (1); a soot treatment mechanism (5) for treating soot and flames is installed in the soot chamber (202); a driving mechanism (4) for driving the two partition plates (211) to rotate around the vertical column (21) is installed on the main box body (1). The soot treatment mechanism (5) includes an inner semi-circular plate (51), an outer semi-circular plate (52), a metal filter screen (53), and a porous heat-insulating and flame-retardant brick (54); two vertically arranged first guide strips (511) are connected to the outer peripheral surface of the inner semi-circular plate (51) and the inner peripheral surface of the outer semi-circular plate (52). One side edge of the metal filter screen (53) is inserted between the two first guide strips (511) of the inner semi-circular plate (51), and the other side edge of the metal filter screen (53) is inserted between the two first guide strips (511) of the outer semi-circular plate (52); two vertically arranged second guide strips (512) are connected to the outer peripheral surface of the inner semi-circular plate (51) and the inner peripheral surface of the outer semi-circular plate (52). One side edge of the porous heat-insulating and flame-retardant brick (54) is inserted between the two second guide strips (512) of the inner semi-circular plate (51), and the other side edge of the porous heat-insulating and flame-retardant brick (54) is inserted between the two second guide strips (512) of the outer semi-circular plate (52), and the porous heat-insulating and flame-retardant brick (54) is located on the side of the metal filter screen (53) away from the exhaust gas inlet pipe (14). One end of a first semi-circular plate (212) and one end of a second semi-circular plate (213) are respectively connected to the sides of the two partition plates (211) close to the inner semi-circular plate (51); the outer side surface of the first semi-circular plate (212) is attached to the inner side surface of the inner semi-circular plate (51), and the outer side surface of the second semi-circular plate (213) is attached to the inner side surface of the first semi-circular plate (212). The driving mechanism (4) includes a driving motor (41), a screw rod (42), a transmission plate (43), a push-pull plate (44) and a push plate (45); two push plates (45) are provided, and the two push plates (45) are respectively connected to the sides of the two partition plates (211) close to the exhaust gas chamber (201) and are symmetrically arranged with respect to the column (21). A waist-shaped hole (451) is provided in the push plate (45); the driving motor (41) is installed on the top surface of the auxiliary box body (2), the output shaft of the driving motor (41) faces away from the push plate (45), the end of the screw rod (42) is connected to the output shaft of the driving motor (41), the transmission plate (43) is sleeved on the circumferential surface of the screw rod (42), the transmission plate (43) is located on the side surface of the auxiliary box body (2), two push-pull plates (44) are provided, and the two push-pull plates (44) are respectively connected to both ends of the side surface of the transmission plate (43) close to the partition plate (211). The ends of the two push-pull plates (44) extend into the exhaust gas chamber (201) and respectively extend to the bottom surfaces of the two push plates (45). A positioning pin (441) for extending into the waist-shaped hole (451) is connected to the top surface of the end of the push-pull plate (44).

2. The easy-to-change fresh air filter according to claim 1, characterized in that: A lifting plate (6) is installed at the top of the metal filter screen (53). Both ends of the bottom surface of the lifting plate (6) are connected with a first guide plate (61). The first guide plate (61) is located on the side of the metal filter screen (53) away from the porous heat-insulating and flame-retardant brick (54). The first guide plate (61) fits on the side surface of the first guide strip (511) away from the metal filter screen (53); a metal mesh brush (62) is arranged on the side surface of the metal filter screen (53) close to the first guide plate (61). The metal mesh brush (62) is used to clean the mesh surface of the metal filter screen (53); both ends of the metal mesh brush (62) are connected with sliding blocks (621). Guide grooves (611) for the two sliding blocks (621) to slide are arranged in both first guide plates (61); a lifting mechanism (63) for driving the metal mesh brush (62) to move up and down is installed on the metal filter screen (53).

3. The easy-to-change fresh air filter according to claim 2, characterized in that: The lifting mechanism (63) includes a lightweight metal rotating plate (631), a first towing rope (632), a second towing rope (633), a first guide pulley (634), a second guide pulley (635), a winding disc (636), and a counterweight (637); both ends of the bottom surface of the lifting plate (6) are connected to a second guide plate (64), and the second guide plate (64) is located on one side of the metal mesh brush (62); both ends of one side edge of the rotating plate (631) are rotatably connected between the two second guide plates (64); the first guide pulley (634) is rotatably connected to the bottom end of the second guide plate (64), and the second guide pulley (635) is rotatably connected to the top surface of the lifting plate (6); the winding disc (636) is rotatably connected to the top surface of the lifting plate (6), and the winding disc (636) is provided with an annular first winding groove (6361) and an annular second winding groove (6362), and the diameter of the first winding groove (6361) is smaller than that of the second winding groove (6362); one end of the first towing rope (632) is connected to the bottom edge of the rotating plate (631), the other end of the first towing rope (632) is connected to the inner wall of the first winding groove (6361), the first towing rope (632) bypasses from the bottom surface of the first guide pulley (634), and the first towing rope (632) bypasses between every pair of two second guide pulleys (635); one end of the second towing rope (633) is connected to the top surface of the metal mesh brush (62), and the other end of the second towing rope (633) is connected to the inner wall of the second winding groove (6362); the counterweight (637) is connected to the side surface of the metal mesh brush (62).

4. The easily replaceable fresh air filter according to claim 2, characterized in that: The bottom surface of the auxiliary box body (2) is provided with an ash discharge port (24), the ash discharge port (24) is located below the metal mesh brush (62), the inner wall of the ash discharge port (24) is connected with a first guide plate (25) and a second guide plate (26), the first guide plate (25) is located below the first guide plate (61), the second guide plate (26) is located on the side of the first guide plate (25) away from the metal filter screen (53), the top end of the second guide plate (26) extends out of the bottom surface of the main box body (1) and bends towards the metal filter screen (53), and the bottom edge of the first guide plate (25) inclines towards the second guide plate (26).

5. The easy-to-change fresh air filter according to claim 2, characterized in that: A first access port (22) is installed on the top surface of the auxiliary box body (2), the first access port (22) communicates with the inside of the soot chamber (202), the first access port (22) is aligned with the lifting plate (6), a handle (65) is connected to the top surface of the lifting plate (6), and a first cover plate (221) is installed on the top surface of the first access port (22).

6. The easy-to-change and wash fresh air filter according to claim 2, wherein: The top surface of the auxiliary box body (2) is provided with an opening, the opening is aligned with the porous heat-insulating and flame-retardant brick (54), a second cover plate (23) is arranged in the opening, and a gripping opening (541) for hand-held is arranged on the top surface of the porous heat-insulating and flame-retardant brick (54).

7. The easy-to-change fresh air filter according to claim 1, wherein: The inner wall of the main box body (1) is provided with a first partition board (15). The first partition board (15) divides the main box body (1) into a filtering chamber (101) and a fan chamber (102). The fan chamber (102) is communicated with the fresh air inlet pipe (11) and the exhaust gas inlet pipe (14). The inner wall of the fan chamber (102) is provided with a second partition board (16). The second partition board (16) divides the fan chamber (102) into a first chamber (103) and a second chamber (104). The first chamber (103) is communicated with the exhaust gas outlet pipe (12). The second chamber (104) is communicated with the fresh air inlet pipe (11). The fresh air filtering mechanism (3) includes a first fan (31), a second fan (32), a total heat exchange core (33) and a filtering component (34). The first fan (31) is installed in the first chamber (103), and the first fan (31) is communicated with the exhaust gas outlet pipe (12). The second fan (32) is installed in the second chamber (104), and the second fan (32) is communicated with the fresh air outlet pipe (13). The total heat exchange core (33) is installed in the filtering chamber (101), and the top surface and the bottom surface of the total heat exchange core (33) are attached to the inner wall of the main box body (1). A first baffle plate (17) is installed on the inner wall of the filtering chamber (101). One side edge of the first baffle plate (17) is attached to the side edge of the total heat exchange core (33), and the other side edge of the first baffle plate (17) is located above the auxiliary box body (2). A second baffle plate (18) is installed in the filtering chamber (101). One side edge of the second baffle plate (18) is attached to the other side edge of the total heat exchange core (33), and the other side edge of the second baffle plate (18) is bent and connected to the inner wall of the main box body (1) and is located above the fresh air inlet pipe (11). The first partition board (15) is provided with a first notch (151) for communicating the first chamber (103) with the space above the total heat exchange core (33) and the second baffle plate (18). The first partition board (15) is provided with a second notch (152) for communicating the second chamber (104) with the space above the total heat exchange core (33) and the first baffle plate (17). The filtering component (34) is installed below the second baffle plate (18) and faces the fresh air inlet pipe (11).

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