Low-resistance high-efficiency air filter

Abstract

The invention relates to the technical field of air filtering equipment, and discloses a low-resistance high-efficiency air filter which is used for solving the problems that air leaks from a gap between the edge of a filtering frame and the side wall of a mounting frame, and the edge of a filtering net is used less, so that the filtering net is wasted. When the pressure difference exists on the two sides of the filter screen, the extrusion sealing effect of the filter frame and the mounting frame on the sealing bag is changed through the pressure difference on the two sides of the filter structure, the situation that the sealing bag is always subjected to large pressure to cause elasticity deterioration is prevented, and the situation that when the pressure difference exists on the two sides of the filter structure, a gap exists between the filter frame and the mounting frame to cause gas leakage is prevented; when a sealing bag is extruded by a filtering frame, gas in the sealing bag pushes a sliding rod and a pushing block to move, a guide plate rotates, and the gas is guided to the edge position of a filtering net, so that the edge position of the filtering net is fully utilized, and the phenomenon that the edge position of the filtering net is not fully utilized, and the filtering net is wasted is prevented.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of air filtering equipment, and in particular to a low-resistance high-efficiency air filter. BACKGROUND

[0002] The high-efficiency air filter is an air purifying device, which is used for capturing particles and dusts with a size of 0.5 microns or above and various suspended matters, and can be used for sending air with low dust content into a room to meet the process requirements of a clean room and the air cleanliness of a general air conditioning room. The high-efficiency air filter is generally used as the terminal filter of various filtering systems, and is widely used in air conditioning terminal air supply of dust-free clean workshops due to high filtering efficiency, low resistance and large dust capacity.

[0003] In the prior art, the filtering frame of the filtering structure is tightly attached to the side wall of the mounting frame through the sealing ring. After the sealing ring is pressed for a long time, the elasticity of the sealing ring is poor. When there is a pressure difference between the two sides of the filter screen of the filtering structure, the filtering structure is deformed, a gap is formed between the filtering frame of the filtering structure and the mounting frame, and unfiltered gas leaks from the gap between the filtering frame and the mounting frame, thereby affecting the filtering quality of the gas. In addition, due to the shielding of the inner edge of the mounting plate, the gas entering the filter screen of the filtering structure is mostly filtered at the middle position of the filter screen. After a period of filtering, the middle position of the filter screen needs to be replaced, while the edge position of the filter screen can still maintain a certain filtering effect. If the filter screen is directly replaced, the filter screen is wasted. SUMMARY

[0004] The application provides a low-resistance high-efficiency air filter, which has the advantages of preventing gas from leaking from the gap between the edge of the filtering frame and the mounting frame and enabling the filter screen to be used uniformly, so as to solve the problems of gas leakage from the gap between the edge of the filtering frame and the side wall of the mounting frame and filter screen waste caused by less use of the edge of the filter screen.

[0005] In order to achieve the above object, the application adopts the following technical scheme: a low-resistance high-efficiency air filter, comprising a mounting plate, a mounting frame, a protection structure and a filter structure, the filter structure comprising a filter frame and a filter screen, the outer wall of the filter frame being in sliding contact with the inner wall of the mounting frame, the filter frame being connected with: support springs, being arrayed on the upper end and the lower end of the filter frame, the other end of the support spring on the upper end of the filter frame being fixedly connected with the mounting frame, the other end of the support spring on the lower end of the filter frame being fixedly connected with the mounting plate; a sealing capsule, being fixedly installed on the upper end of the filter frame, the sealing capsule being filled with high-pressure gas, the top end of the sealing capsule abutting against the mounting frame, a plurality of mounting holes being arrayed on the sealing capsule, the support spring on the upper end of the filter frame being located in the mounting hole of the sealing capsule; the inner wall of the mounting plate being fixedly installed with the protection structure for changing the flow direction of the air flow.

[0006] Further, the protection structure comprises: two support pipes, being arranged in parallel and having both ends fixedly inserted into the inner wall of the mounting plate, the support pipes being hollow pipes; a reset spring, being arranged at the middle position inside the support pipe; two slide rods, being fixedly connected with both ends of the reset spring and being slidingly and sealingly installed in the support pipe; a sliding groove, being symmetrically provided on both sides of the bottom end of the support pipe; a plurality of guide plates, being equidistantly sleeved on the support pipe, the guide plates being in a vertical state; a plurality of pushing blocks, being equidistantly installed on the slide rods and being slidingly arranged in the sliding groove, the side wall of the pushing block being close to the guide plate; the mounting frame and the mounting plate being fixedly installed with a communication pipe on both sides inside the mounting frame and the mounting plate, one end of the communication pipe being in communication with the sealing capsule, the other end of the communication pipe being in communication with the support pipe.

[0007] Further, the hole in which the guide plate is sleeved on the support pipe is an oblong hole, the top end of the oblong hole on the guide plate being clamped on the support pipe.

[0008] Further, the reset spring is always in a compressed state.

[0009] Further, the length of the reset spring is smaller than the distance from the end of the support pipe to the first guide plate.

[0010] Further, a plurality of exhaust holes are equidistantly provided in the mounting frame and the mounting plate, one end of the exhaust hole in the mounting frame being in communication with the inner wall of the mounting frame, the other end of the exhaust hole in the mounting frame being blocked by the filter frame; one exhaust hole being provided in the mounting plate, one end of the exhaust hole being in communication with a plurality of exhaust holes on the mounting plate, the other end of the exhaust hole being open to the bottom end of the mounting plate; the position of the mounting plate at the exhaust hole being provided with a prompting mechanism for prompting replacement of the filter structure.

[0011] Further, the prompting mechanism comprises: a mounting groove, which is arranged on the side wall of the air outlet hole near the outlet; a power generation device, which is arranged in the mounting groove and is powered by the airflow; and a prompting lamp, which is fixedly arranged at the bottom end of the mounting plate and is located beside the air outlet hole, and the prompting lamp is electrically connected with the power generation device.

[0012] Further, the power generation device comprises: a support shaft, which is transversely inserted into the middle position of the mounting groove; a plurality of groups of coils, which are movably sleeved on the support shaft; a slip ring, which is fixedly sleeved on one end of the support shaft; and two permanent magnets, which are fixedly arranged on the inner walls of the two sides of the mounting groove, and the magnetic poles generated by the two permanent magnets facing each other are opposite.

[0013] The application has the following beneficial effects: 1. The low-resistance high-efficiency air filter provided by the application changes the filtering structure into a movable type. Under normal circumstances, the sealing bag seals the gap between the filtering frame and the mounting frame. When there is a pressure difference between the two sides of the filtering structure, the side with high pressure extrudes the filtering screen and the filtering frame, so that the filtering frame extrudes the sealing bag. The sealing effect between the filtering frame and the mounting frame is more compact due to the extrusion of the sealing bag. The extrusion sealing effect of the sealing bag by the filtering frame and the mounting frame is changed by the pressure difference between the two sides of the filtering structure, so that the sealing bag is not always subjected to a large pressure, and the phenomenon of poor elasticity is prevented. In addition, when there is a pressure difference between the two sides of the filtering structure, the gap between the filtering frame and the mounting frame is prevented, so that the gas leaks from the gap.

[0014] 2. The low-resistance high-efficiency air filter provided by the application. When the sealing bag is extruded by the filtering frame, a small amount of gas in the sealing bag enters the support pipe through the communication pipe, pushes the sliding rod and the pushing block to move, so that the pushing block pushes the guide plate to rotate, changes the direction of the gas to be introduced into the middle position of the filtering screen, and guides the gas to the edge position of the filtering screen, so that the middle and edge of the filtering screen can be fully utilized, and the phenomenon that only the middle position of the filtering screen can fully play the filtering effect while the edge position of the filtering screen is not fully utilized is prevented.

[0015] 3. The low-resistance high-efficiency air filter provided by the application. When there is a pressure difference between the two sides of the filtering structure, the side with high pressure extrudes the filtering structure, so that the filtering frame of the filtering structure extrudes the sealing bag, and the whole filtering structure moves to one side of the sealing bag, so that the exhaust hole on the mounting frame and the mounting plate is no longer blocked by the filtering frame, and part of the gas moving towards the filtering screen can flow to the outside through the exhaust hole. The phenomenon that the filtering structure is deformed due to the excessive pressure difference between the two sides of the filtering structure is prevented, so that the deformation of the filtering structure does not affect the filtering effect of the filtering structure on the gas.

[0016] 4. The present application provides a low-resistance, high-efficiency air filter. When the filter is blocked to a certain extent and the pressure difference on both sides of the filter reaches a maximum, the high-pressure side squeezes the filter structure, causing the filter frame of the filter structure to squeeze the sealing bag, thereby completely releasing the blockage of the exhaust hole by the filter frame. During this process, the gas discharged from the exhaust hole is discharged through the air outlet and the mounting groove. During the gas discharge process, the gas blows the coil to rotate, and the rotating coil cuts the magnetic flux lines generated by the permanent magnet block, causing the coil to generate current. The current is transmitted to the warning light through the slip ring, causing the warning light to flash, thereby reminding the staff to replace the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments disclosed herein and, together with the description, serve to explain the principles disclosed herein.

[0018] The present application can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which: Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 is a cross-sectional view of the mounting plate, mounting frame and filtering structure of the present invention; Figure 3 It is a structural schematic diagram of the protective structure of the present invention; Figure 4 For the present invention Figure 3 A magnified view of the local structure at center A; Figure 5 This is a cross-sectional view of the mounting plate and mounting frame of the present invention taken from the axis of the connecting pipe; Figure 6 A cross-sectional view of the mounting plate and mounting frame of the present invention taken from the axis of the exhaust hole; Figure 7 For the present invention Figure 6 A magnified view of the local structure at point B in the middle; Figure 8 A cross-sectional view of the mounting plate of the present invention taken from the axis of the air outlet; Figure 9 For the present invention Figure 8 Enlarged view of the local structure at point C in the middle.

[0019] In the figure: 1. Mounting plate; 2. Mounting frame; 3. Protective structure; 301. Support tube; 302. Return spring; 303. Slide rod; 304. Slide groove; 305. Push block; 306. Guide plate; 307. Connecting pipe; 4. Filter structure; 401. Filter frame; 402. Filter screen; 5. Support spring; 6. Sealing bag; 7. Exhaust hole; 8. Prompt mechanism; 801. Exhaust hole; 802. Mounting groove; 803. Support shaft; 804. Coil; 805. Slip ring; 806. Permanent magnet; 807. Prompt light. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work are within the protection scope of the present application. EMBODIMENTS

[0021] Please refer to Figure 1 and Figure 2The utility model provides a low resistance high -efficient air filter, including mounting plate 1, mounting frame 2, guard structure 3 and filter structure 4, the top of mounting plate 1 is fixedly installed with mounting frame 2, the inside of mounting frame 2 is slidably installed with filter structure 4, and filter structure 4 includes filter frame 401 and filter screen 402, filter frame 401 is the " back " character type, and the middle of filter frame 401 is fixedly installed with filter screen 402 for filtering gas, and the outer wall of filter frame 401 is in sliding contact with the inner wall of mounting frame 2, and a plurality of support springs 5 are installed in array on the upper end and the lower end of filter frame 401 respectively, and the other end of the support spring 5 of filter frame 401 upper end is fixedly connected with mounting frame 2, and the other end of the support spring 5 of filter frame 401 lower end is fixedly connected with mounting plate 1, and the inner wall of mounting plate 1 is fixedly installed with guard structure 3, and the upper end of filter frame 401 is fixedly installed with sealing capsule 6, the sealing capsule 6 is filled with high pressure gas, the top of sealing capsule 6 bears against mounting frame 2, and a plurality of mounting holes are arranged in array on sealing capsule 6, and the support spring 5 of filter frame 401 upper end is in the mounting hole of sealing capsule 6;Under normal circumstances, because the support spring 5 on the both sides of filter frame 401 supports filter frame 401, filter frame 401 is in static state, at this moment, the sealing capsule 6 on the upside of filter frame 401 seals the gap between filter frame 401 and mounting frame 2, when using high -efficient air filter to filter gas, need to fix mounting plate 1 of high -efficient air filter in the end of various filter systems, in this process, high pressure gas enters filter screen 402 from the middle position of mounting plate 1, and the purified gas is led into the workshop from the middle position of mounting frame 2, because of the hindering effect of filter screen 402, there is pressure difference on the both sides of filter screen 402, at this moment, the gas of high pressure side extrudes filter screen 402 and filter frame 401, and filter frame 401 extrudes sealing capsule 6, and the sealing effect between filter frame 401 and mounting frame 2 is more compact due to the extrusion of sealing capsule 6, in this process, the extrusion sealing effect of filter frame 401 and mounting frame 2 to sealing capsule 6 is changed by the pressure difference on the both sides of filter structure 4, prevent sealing capsule 6 from being always subjected to greater pressure, lead to the phenomenon of poor elasticity, and prevent the phenomenon that the gap exists between filter frame 401 and mounting frame 2 when the pressure difference exists on the both sides of filter structure 4, and gas leaks from the gap.

[0022] Please refer to Figures 2-4The protection structure 3 comprises support pipes 301, return springs 302, sliding rods 303, pushing blocks 305 and guide plates 306, the two support pipes 301 are arranged in parallel, and the two ends of the support pipe 301 are fixedly inserted into the inner wall of the mounting plate 1, the support pipe 301 is a hollow pipe, the middle position inside the support pipe 301 is provided with the return spring 302, the two ends of the return spring 302 are fixedly connected with the sliding rod 303 respectively, and the sliding rod 303 is slidingly and sealingly installed in the support pipe 301, the two sides of the bottom end of the support pipe 301 are symmetrically provided with sliding grooves 304, a plurality of guide plates 306 are equidistantly sleeved on the support pipe 301, the hole, in which the guide plate 306 is sleeved on the support pipe 301, is an oblong hole, the top end of the oblong hole on the guide plate 306 is clamped on the support pipe 301, a plurality of pushing blocks 305 are equidistantly installed on the sliding rod 303, the pushing block 305 is slidingly arranged in the sliding groove 304, and the side wall of the pushing block 305 is close to the guide plate 306, at this time, the guide plate 306 is in a vertical state, please refer to Figure 5 The installation frame 2 and the two sides inside the mounting plate 1 are fixedly installed with communication pipes 307, one end of the communication pipe 307 communicates with the sealing bag 6, and the other end of the communication pipe 307 communicates with the support pipe 301; when the high-efficiency air filter is used to filter the gas, due to the blocking effect of the filter screen 402, there is a pressure difference on the two sides of the filter screen 402, at this time, the gas on the high-pressure side extrudes the filter screen 402 and the filter frame 401, so that the filter frame 401 extrudes the sealing bag 6, because the sealing bag 6 is extruded, the pressure of the gas in the sealing bag 6 is further increased, at this time, a small part of the gas in the sealing bag 6 enters the support pipe 301 through the communication pipe 307, the gas entering the support pipe 301 pushes the sliding rod 303 and the pushing block 305 to move, so that the pushing block 305 pushes the guide plate 306 to rotate, and the gas entering the middle position of the filter screen 402 is blown to the guide plate 306, the guide plate 306 changes the flow direction of the gas, so that the gas flows to the edge position of the filter screen 402, so that the edge of the filter screen 402 can also be fully utilized, the gas is filtered, and the phenomenon that only the middle position of the filter screen 402 can fully play a filtering effect, and the edge position of the filter screen 402 is not fully utilized, so that the filter screen 402 is wasted.

[0023] The return spring 302 is always in a compressed state. The return spring 302 in the compressed state provides support force for the sliding rod 303 and the pushing block 305, prevents the high-pressure gas in the sealing bag 6 from pushing the sliding rod 303 and the pushing block 305 to move, and makes the pushing block 305 push the guide plate 306, so that the guide plate 306 is inclined, and the support force of the return spring 302 is used to balance the gas pressure in the sealing bag 6, so as to ensure that the guide plate 306 is in a vertical state.

[0024] The length of the reset spring 302 is less than the distance from the end of the supporting tube 301 to the first guide plate 306. When the slide rod 303 is pressed by the gas to compress the reset spring 302, the distance that prevents the slide rod 303 from moving is too large, the inside of the supporting tube 301 is communicated with the outside through the slide groove 304, and the gas in the sealing bag 6 is leaked.

[0025] The working principle of the embodiment one of the present application is as follows: Please refer to Figures 1-5 In normal circumstances, the filter frame 401 is in a static state due to the support of the filter frame 401 by the supporting springs 5 on both sides of the filter frame 401, at this time, the sealing bag 6 on the upper side of the filter frame 401 seals the gap between the filter frame 401 and the mounting frame 2, when the high-efficiency air filter is used to filter the gas, the mounting plate 1 of the high-efficiency air filter needs to be fixedly installed at the end of various filtering systems, in this process, the high-pressure gas enters the filter screen 402 from the middle position of the mounting plate 1, and the purified gas is introduced into the workshop from the middle position of the mounting frame 2, due to the blocking effect of the filter screen 402, there is a pressure difference on both sides of the filter screen 402, at this time, the gas on the side with high pressure presses the filter screen 402 and the filter frame 401, so that the filter frame 401 presses the sealing bag 6, and the sealing bag 6 pressed makes the sealing effect between the filter frame 401 and the mounting frame 2 more compact, in this process, the filter frame 401 and the mounting frame 2 change the extrusion sealing effect of the sealing bag 6 through the pressure difference on both sides of the filtering structure 4, so as to prevent the sealing bag 6 from being always subjected to a large pressure and causing the phenomenon of poor elasticity, and prevent the gap between the filter frame 401 and the mounting frame 2 from existing when there is a pressure difference on both sides of the filtering structure 4, so as to prevent the phenomenon of gas leakage from the gap.

[0026] When the high-efficiency air filter is used to filter the gas, due to the blocking effect of the filter screen 402, there is a pressure difference on both sides of the filter screen 402, at this time, the gas on the side with high pressure presses the filter screen 402 and the filter frame 401, so that the filter frame 401 presses the sealing bag 6, and the sealing bag 6 is further pressed, so that the pressure of the gas in the sealing bag 6 is further increased, at this time, a small part of the gas in the sealing bag 6 enters the supporting tube 301 through the communication pipe 307, the gas entering the supporting tube 301 pushes the slide rod 303 and the push block 305 to move, so that the push block 305 pushes the guide plate 306 to rotate, so as to blow the gas about to enter the middle position of the filter screen 402 to the guide plate 306, the guide plate 306 changes the flow direction of the gas, so that the gas flows to the edge position of the filter screen 402, so as to make the edge of the filter screen 402 also be fully utilized to filter the gas, so as to prevent the phenomenon that only the middle position of the filter screen 402 can fully play the filtering effect, and the edge position of the filter screen 402 is not fully utilized, so as to cause the waste of the filter screen 402. Embodiment

[0027] Embodiment two is further improved on the basis of embodiment one.

[0028] Different from embodiment one, please refer to Figures 5-7 , a plurality of air exhaust holes 7 are equidistantly arranged in the interior of the mounting frame 2 and the mounting plate 1, one end of the air exhaust hole 7 in the mounting frame 2 is communicated with the inner wall of the mounting frame 2, and the one end of the air exhaust hole 7 in the mounting frame 2 is blocked by the filter frame 401, the mounting plate 1 is provided with an air outlet hole 801, one end of the air outlet hole 801 is communicated with a plurality of air exhaust holes 7 on the mounting plate 1, and the other end of the air outlet hole 801 is communicated with the bottom end of the mounting plate 1; when the high-efficiency air filter is used to filter the gas, due to the blocking effect of the filter screen 402, there is a pressure difference on both sides of the filter screen 402, at this time, the high-pressure side extrudes the filter structure 4, so that the filter frame 401 of the filter structure 4 extrudes the sealing bag 6, and the filter structure 4 moves to one side of the sealing bag 6, in the process of moving of the filter structure 4, the air exhaust hole 7 blocked by the filter frame 401 is gradually opened, at this time, part of the high-pressure gas moving to the filter screen 402 can flow to the outside through the air exhaust hole 7 and the air outlet hole 801, the greater the pressure difference on both sides of the filter screen 402, the greater the distance of the filter structure 4 moving upward, the greater the gap of the air exhaust hole 7 being opened, which increases the amount of gas flowing to the outside through the air exhaust hole 7 and the air outlet hole 801, prevents the pressure difference on both sides of the filter structure 4 from being too large, which causes the deformation of the filter structure 4, thereby preventing the deformation of the filter structure 4 from affecting the filtering effect of the filter screen 402 on the gas.

[0029] Please refer to Figures 5-9 , the position of the mounting plate 1 at the air outlet hole 801 is provided with a prompt mechanism 8 for prompting the replacement of the filter structure 4, the prompt mechanism 8 includes a mounting groove 802, a power generation device and a prompt light 807, the side wall of the air outlet hole 801 near the outlet is provided with a mounting groove 802, the mounting groove 802 is provided with a power generation device driven by airflow, and the bottom end of the mounting plate 1 and the position beside the air outlet hole 801 is fixedly provided with a prompt light 807, and the prompt light 807 is electrically connected with the power generation device.

[0030] The power generation device comprises a supporting shaft 803, a coil 804, a slip ring 805 and a permanent magnet block 806, the supporting shaft 803 is transversely inserted into the middle position of the installation groove 802, a plurality of groups of the coil 804 are movably sleeved on the supporting shaft 803, the slip ring 805 is fixedly sleeved on one end of the supporting shaft 803, the permanent magnet block 806 is fixedly installed on the inner wall of both sides of the installation groove 802, the magnetic poles generated by the opposite facing surfaces of the two permanent magnet blocks 806 are opposite, the prompt lamp 807, the slip ring 805 and the coil 804 are electrically connected; when the filter screen 402 is blocked by impurities to a certain extent, the pressure difference on both sides of the filter screen 402 reaches the maximum limit, at this time, the side with high pressure extrudes the filter structure 4, so that the filter frame 401 of the filter structure 4 extrudes the sealing capsule 6, so that the filter frame 401 completely releases the blockage of the exhaust hole 7, in this process, the gas discharged from the exhaust hole 7 is discharged through the gas outlet hole 801 and the installation groove 802, in the process of discharging the gas, the coil 804 is rotated by the gas, the rotating coil 804 cuts the magnetic induction lines generated by the permanent magnet block 806, so that the coil 804 generates current, only when the filter frame 401 no longer blocks the exhaust hole 7, the gas flowing into the gas outlet hole 801 from the exhaust hole 7 can blow the rotating speed of the coil 804 to a certain speed, at this time, the current generated by the coil 804 is transmitted to the prompt lamp 807 through the slip ring 805, and the size of the current makes the prompt lamp 807 flicker, so as to remind the staff to replace the filter screen 402.

[0031] The working principle of the second embodiment of the present application is as follows: Please refer to Figures 1-9 When the high-efficiency air filter is used to filter the gas, due to the blocking effect of the filter screen 402, there is a pressure difference on both sides of the filter screen 402, at this time, the side with high pressure extrudes the filter structure 4, so that the filter frame 401 of the filter structure 4 extrudes the sealing capsule 6, and the filter structure 4 as a whole moves to one side of the sealing capsule 6, in the process of moving of the filter structure 4, the exhaust hole 7 blocked by the filter frame 401 is gradually opened, at this time, part of the high-pressure gas moving to the filter screen 402 can flow to the outside through the exhaust hole 7 and the gas outlet hole 801, the greater the pressure difference on both sides of the filter screen 402, the greater the distance of the upward movement of the filter structure 4, and the greater the gap of the opening of the exhaust hole 7, thereby increasing the amount of the gas flowing to the outside through the exhaust hole 7 and the gas outlet hole 801, preventing the pressure difference on both sides of the filter structure 4 from being too large, so as to prevent the deformation of the filter structure 4, thereby preventing the deformation of the filter structure 4 from affecting the filtering effect of the filter screen 402 on the gas.

[0032] When the filter screen 402 is clogged by impurities to a certain extent, the pressure difference between the two sides of the filter screen 402 reaches the maximum limit, at this time, the side with high pressure extrudes the filter structure 4, so that the filter frame 401 of the filter structure 4 extrudes the sealing bag 6, so that the filter frame 401 completely releases the blockage of the exhaust hole 7, in the process, the gas discharged from the exhaust hole 7 is discharged through the gas outlet hole 801 and the mounting groove 802, in the process of discharging the gas, the coil 804 is blown by the gas to rotate, the rotating coil 804 cuts the magnetic induction line generated by the permanent magnet block 806, so that the coil 804 generates current, only when the filter frame 401 completely no longer blocks the exhaust hole 7, the gas flowing into the gas outlet hole 801 from the exhaust hole 7 can blow the rotating speed of the coil 804 to a certain speed, at this time, the current generated by the coil 804 is transmitted to the prompt lamp 807 through the slip ring 805, and the size of the current makes the prompt lamp 807 flicker, so as to remind the staff to replace the filter screen 402.

Claims

1. A low-resistance high-efficiency air filter, comprising a mounting plate (1), a mounting frame (2), a protective structure (3), and a filter structure (4), wherein the filter structure (4) comprises a filter frame (401) and a filter screen (402), and is characterized in that: The outer wall of the filter frame (401) is in sliding contact with the inner wall of the mounting frame (2), and the filter frame (401) is connected with: Support springs (5) are arrayed on the upper and lower ends of the filter frame (401), the other end of the support spring (5) at the upper end of the filter frame (401) is fixedly connected to the mounting frame (2), and the other end of the support spring (5) at the lower end of the filter frame (401) is fixedly connected to the mounting plate (1); A sealing capsule (6) is fixedly mounted on the upper end of the filter frame (401), wherein the sealing capsule (6) is filled with high-pressure gas, and the top end of the sealing capsule (6) abuts against the mounting frame (2), and a plurality of mounting holes are arranged in an array on the sealing capsule (6), and the support spring (5) at the upper end of the filter frame (401) is located in the mounting hole of the sealing capsule (6); A protective structure (3) for changing the direction of airflow is fixedly mounted on the inner wall of the mounting plate (1).

2. A low resistance high efficiency air filter according to claim 1, characterized in that: The protective structure (3) comprises: Two support tubes (301) are arranged in parallel, and both ends are fixedly inserted into the inner wall of the mounting plate (1), and the support tubes (301) are hollow tubes; A return spring (302) is provided in the middle of the support tube (301); Two sliding rods (303) are fixedly connected to the two ends of the return spring (302), and the sliding seal is installed in the support tube (301); The chute (304) is symmetrically arranged on both sides of the bottom end of the support tube (301); A plurality of guide plates (306) are sleeved on the support tube (301) at equal intervals, and the guide plates (306) are in a vertical state; A plurality of push blocks (305) are equidistantly mounted on the slide bar (303) and slidably arranged in the slide groove (304), and the side walls of the push blocks (305) are in close contact with the guide plate (306); A connecting pipe (307) is fixedly installed on both sides of the interior of the mounting frame (2) and the mounting plate (1), one end of the connecting pipe (307) is connected to the sealing bag (6), and the other end of the connecting pipe (307) is connected to the support pipe (301).

3. A low resistance high efficiency air filter according to claim 2, characterized in that: The hole through which the guide plate (306) is sleeved on the support tube (301) is an oblong hole, and the top end of the oblong hole on the guide plate (306) is clamped on the support tube (301).

4. The low-resistance high-efficiency air filter according to claim 2, characterized in that: The return spring (302) is always in a compressed state.

5. The low resistance high efficiency air filter according to claim 2, characterized in that: The length of the return spring (302) is smaller than the distance from the end of the support tube (301) to the first guide plate (306).

6. The low resistance high efficiency air filter according to claim 2, characterized in that: A plurality of exhaust holes (7) are equidistantly provided inside the mounting frame (2) and the mounting plate (1), one end of the exhaust hole (7) on the mounting frame (2) is connected to the inner wall of the mounting frame (2), and one end of the exhaust hole (7) on the mounting frame (2) is blocked by the filter frame (401); An air outlet hole (801) is provided in the mounting plate (1), one end of the air outlet hole (801) is connected to a plurality of exhaust holes (7) on the mounting plate (1), and the other end of the air outlet hole (801) leads to the bottom end of the mounting plate (1); The mounting plate (1) is provided with a prompting mechanism (8) at the position of the air outlet (801) for prompting the replacement of the filter structure (4).

7. A low resistance high efficiency air filter according to claim 6, characterized in that: The prompting mechanism (8) comprises: The mounting groove (802) is provided on the side wall of the air outlet (801) near the outlet; A power generation device is arranged in the installation groove (802), and the air flow is used as a power source; The warning light (807) is fixedly mounted on the bottom end of the mounting plate (1) and is located next to the air outlet (801). The warning light (807) is electrically connected to the power generation device.

8. The low resistance high efficiency air filter according to claim 1, characterized in that: The power generation device comprises: The support shaft (803) is inserted transversely into the middle position of the mounting groove (802); A plurality of coils (804) are movably sleeved on the support shaft (803); A slip ring (805) is fixedly sleeved on one end of the support shaft (803); Two permanent magnet blocks (806) are fixedly mounted on the inner walls on both sides of the mounting groove (802), and the magnetic poles generated by the facing surfaces of the two permanent magnet blocks (806) are opposite; The warning light (807), the slip ring (805) and the coil (804) are electrically connected.

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