CN211836786U - Large central efficient air filter - Google Patents

Abstract

The utility model belongs to clean workshop dust removal field, especially a high-efficient air cleaner of large-scale central authorities, including the toper air inlet, the rectangle shell, the export of toper net gas, set up first fillter section and second fillter section in the rectangle shell, set up a n filter core at every fillter section, wherein 8 are less than or equal to n and are less than or equal to 160, the fillter section comprises a w isosceles trapezoid facade, wherein w is greater than or equal to 2, single isosceles trapezoid facade is set up by two individual layers and is set up isosceles trapezoid and arrange to form, set up first closing plate at isosceles trapezoid's topside, first closing plate respectively with two individual layers set facade fixed connection, isosceles trapezoid's base is the air intake, air intake and toper air inlet intercommunication, through second closing plate fixed connection between two liang. The utility model discloses filter core is changed and can not pollute pipeline and clean workshop, saves a large amount of consumptive materials, and occupation space is little.

Description

Large central efficient air filter

Technical Field

The utility model belongs to clean workshop dust removal field, especially a high-efficient air cleaner of large-scale central authorities.

Background

Traditional high-efficient air cleaner generally is located clean workshop air conditioner terminal supply-air outlet, air conditioner terminal supply-air outlet generally is located the workshop ceiling, every workshop can dispose a plurality of air conditioner terminal supply-air outlets according to the area size, 1 air filter of general configuration of every air conditioner terminal supply-air outlet and fixing device thereof, 2 to 4 filtration core and fixing device of the parallelly connected combination of extremely individual terminal supply-air outlet configuration, a unit high-efficient air cleaner is constituteed to every air filter and fixing device thereof, a plurality of unit high-efficient air cleaner form a large-scale traditional high-efficient air cleaner through the parallelly connected combination of air supply pipeline.

The problems of the traditional high-efficiency air filter are as follows: 1. the high-efficiency air filter is positioned at the end of the air supply outlet of the pipeline, no isolation measure is provided between the high-efficiency air filter and a clean workshop, and the pollution in the process of disassembling, assembling and disassembling the filter element during replacement cannot be controlled absolutely, so that the clean workshop is always polluted. 2. The high-efficiency air filter is positioned at the end of the air supply outlet of the pipeline, and the air supply pipeline cannot reach the level of a clean level and always has secondary pollution. 3. In a small and dispersed unit filtering mode, the negative pressure value of the high-efficiency air filter of each unit cannot be ensured to be balanced, so that air supply at an air supply outlet is unbalanced, and the air supply balance of a workshop is influenced. 4. In a small and dispersed filtering mode, the negative pressure value of each unit efficient air filter is difficult to detect, and the use condition cannot be controlled, so that the whole service life of the filter element can only be calculated by adopting a shortest service life method, namely the service life of the filter element individual body of the plurality of unit efficient air filters, wherein the negative pressure value of which reaches the saturation value at the earliest, is used as the service life of all the filter elements, namely the traditional method for regularly replacing the service life of the filter element, and therefore, huge waste of consumables is often caused. 5. The small and scattered unit filtering modes cannot be controlled by using working conditions, the management is inconvenient, and the occupied space is large.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides a large-scale central high-efficiency air filter, which can easily and effectively control the process pollution generated by the disassembly, disassembly and assembly of the filter element during the replacement, and can not pollute pipelines and clean workshops; in the centralized filtering mode, when the negative pressure value of each filter element is unbalanced, the high-efficiency air filter can automatically balance to ensure that the air supply of each air supply outlet is balanced; the occupied space is small. The utility model discloses the technical problem that solve is realized through following technical scheme:

a large-scale central high-efficient air filter comprises a conical air inlet, a rectangular shell and a conical purified air outlet, wherein a first filtering section and a second filtering section are arranged in the rectangular shell, each filtering section is provided with n filtering cores, n is more than or equal to 8 and less than or equal to 160, the upper end and the lower end of the first filtering section and the lower end of the second filtering section are respectively and fixedly connected with the rectangular shell, an air inlet channel is arranged between the left end of the first filtering section and the rectangular shell, the right end of the first filtering section is fixedly connected with the rectangular shell, the left end of the second filtering section is fixedly connected with the rectangular shell, a clean channel is arranged between the right end of the second filtering section and the rectangular shell, the first filtering section and the second filtering section are separated by an S-shaped partition plate, the air inlet channel is communicated with the conical air inlet, and the clean channel is communicated with; the filtering section is composed of w isosceles trapezoid vertical faces, w is more than or equal to 2, the single isosceles trapezoid vertical face is composed of two single-layer assembly vertical faces which are arranged in an isosceles trapezoid shape, a first sealing plate is arranged on the top edge of the isosceles trapezoid and is fixedly connected with the two single-layer assembly vertical faces respectively, the bottom edge of the isosceles trapezoid is an air inlet, the air inlet is communicated with the conical air inlet, and every two isosceles trapezoid vertical faces are fixedly connected through a second sealing plate.

Furthermore, the single-layer set vertical surface comprises x rows and y columns of square fixing frames, wherein x is more than or equal to 24 and is more than or equal to 2, y is more than or equal to 10 and is more than or equal to 2, and a filter element is correspondingly arranged in each square fixing frame.

Specifically, the square fixing frame is formed by cross welding channel steel according to the inner width specification of the filter element by 90 degrees, the front face of the channel steel is a windward face, the groove face of the channel steel is a leeward face, four corners of the windward face of the square fixing frame are respectively provided with a fixing angle steel and a guide angle steel according to the outer width specification of the filter element for placing the filter element, and a fastening device is respectively arranged between every two guide angle steels for locking the filter element; the fixed angle steel is arranged on the outer side of the guide angle steel, the length of the fixed angle steel is smaller than that of the guide angle steel, the guide angle steel is fixedly welded with the fixed angle steel, the fixed angle steel is fixedly welded with the front face of the channel steel, and a gap of 2mm-5mm is reserved between the guide angle steel and the channel steel.

Specifically, the fastening device comprises a positioning plate, a fixing screw and a central asymmetric plate, the left end and the right end of the positioning plate are fixedly connected with the guide angle steel respectively, the fixing screw is arranged at any end of the upper end face of the positioning plate, the upper end face of the positioning plate is fixedly connected with the fixing screw, the central asymmetric plate is provided with a screw hole matched with the fixing screw, and the central asymmetric plate and the fixing screw are matched to play a role in locking the filter element.

Specifically, when the fastening device is arranged at the position close to the edge, one end of the positioning plate is fixedly connected with the guide angle steel, the other end of the positioning plate is fixedly connected with the support angle steel, and the support angle steel is fixedly welded with the front face of the channel steel.

Specifically, the square fixing frame is formed by cross welding of a flat through according to the outer width specification of the filter element by 90 degrees, an angle steel frame is arranged on the inner side of the flat through, one right-angle side of the angle steel frame is fixedly connected with the inner side of the flat through, and the other right-angle side of the angle steel frame forms a filter element base for placing the filter element; and fastening devices are respectively arranged at four corners of the windward side close to the square fixing frame.

Specifically, the fastening device comprises a fixing screw and a central asymmetric plate, the fixing screw is welded on the windward side of the flat-through, the central asymmetric plate is provided with a screw hole matched with the fixing screw, and the central asymmetric plate and the fixing screw are matched to play a role in locking the filter element; when the fastening device is arranged at the position close to the edge, the wind-resistant flat-through structure further comprises a support angle steel, and the support angle steel is fixed on the windward side of the flat-through structure.

Particularly, a filter element is arranged in each square fixing frame, an outer frame on the back of the filter element is in sealing connection with the square fixing frame through a sealing strip, and the front of the filter element is locked and fixed through four fastening devices; the filter element front faces the windward side, and the filter element windward side faces the direction of the conical air inlet.

Preferably, the S-shaped partition plates are respectively formed by fixedly connecting three partition plates.

Preferably, access doors are respectively arranged on the left side and the right side of the rectangular shell.

The utility model has the advantages of it is following:

(1) the invention is positioned at the front end of the air supply pipeline, and the pollution in the process of disassembling, disassembling and assembling the filter element during replacement can be easily and effectively controlled, and the pipeline and a clean workshop can not be polluted.

(2) The air supply pipeline is always kept clean, and secondary pollution is avoided.

(3) And in a centralized filtering mode, when the negative pressure value of each filter element is unbalanced, the high-efficiency air filter can automatically balance to ensure that air supply of each air supply outlet is balanced.

(4) The negative pressure value of the high-efficiency air filter is extremely easy to detect, the using working condition is clear at a glance, and the management is convenient and efficient; the service life of the filter element can completely adopt a longest service life calculation method, namely, the whole negative pressure value of the large-scale central efficient air filter reaches a saturation value, the replacement time of the filter element is determined, and a large amount of consumables are saved.

(5) The occupied space is small.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic view of an isosceles trapezoid facade;

FIG. 4 is a schematic structural view of a single-layer aggregate facade;

FIG. 5 is an enlarged view of portion A of FIG. 4;

FIG. 6 is a top view of FIG. 5;

FIG. 7 is a schematic view of the cartridge of FIG. 5 with the cartridge removed;

FIG. 8 is a top view of FIG. 7;

FIG. 9 is another schematic structural view of a square fixing frame;

FIG. 10 is a top view of FIG. 9;

fig. 11 is a schematic structural view of an S-shaped separator.

Detailed Description

Fig. 1 is a schematic structural view of the present invention; fig. 2 is a top view of fig. 1. As shown in figures 1 and 2, a large-scale central high-efficiency air filter comprises a conical air inlet 1, a rectangular shell 2 and a conical purified air outlet 3, wherein a first filtering section 4 and a second filtering section 5 are arranged in the rectangular shell 2, n filtering cores 12 are arranged in each filtering section, n is more than or equal to 8 and less than or equal to 160, the upper end and the lower end of the first filtering section 4 and the lower end of the second filtering section 5 are respectively fixedly connected with the rectangular shell 2, an air inlet channel 6 is arranged between the left end of the first filtering section 4 and the rectangular shell 2, the right end of the first filtering section 4 is fixedly connected with the rectangular shell 2, the left end of the second filtering section 5 is fixedly connected with the rectangular shell 2, a clean channel 7 is arranged between the right end of the second filtering section 5 and the rectangular shell 2, the first filtering section 4 and the second filtering section 5 are separated by an S-shaped clapboard 8, the air inlet channel 6 is communicated with the conical air inlet 1, the clean channel 7 communicates with the conical clean gas outlet 3. Fig. 11 is a schematic structural view of the S-shaped partition, and as shown in fig. 11, the S-shaped partition 8 is formed by fixedly connecting a first partition 8.1, a second partition 8.2, and a third partition 8.3, and access doors 14 are respectively disposed on the left and right sides of the rectangular housing 2.

Fig. 3 is a schematic structural diagram of an isosceles trapezoid facade, as shown in fig. 3, the filtering section is composed of w isosceles trapezoid facades 9, w is equal to or greater than 2, a single isosceles trapezoid facade 9 is composed of two single-layer aggregate facades 10 arranged in an isosceles trapezoid, a first sealing plate 9.1 is arranged on the top side of the isosceles trapezoid, the first sealing plate 9.1 is fixedly connected with the two single-layer aggregate facades 10, the bottom side of the isosceles trapezoid is an air inlet 9.2, the air inlet 9.2 is communicated with the tapered air inlet 1, every two isosceles trapezoid facades 9 are fixedly connected through a second sealing plate 13, and the isosceles trapezoid facades 9 are fixedly connected with the S-shaped partition plate 8 and the rectangular shell 2 through the second sealing plate 13.

FIG. 4 is a schematic structural diagram of a single-layer assembly vertical surface, as shown in FIG. 4, the single-layer assembly vertical surface 10 includes x rows and y columns of square fixing frames 11, 24 is greater than or equal to x is greater than or equal to 2, 10 is greater than or equal to y is greater than or equal to 2, and a filter element 12 is correspondingly arranged in each square fixing frame 11.

FIG. 5 is an enlarged view of portion A of FIG. 4; FIG. 6 is a top view of FIG. 5; FIG. 7 is a schematic view of the cartridge of FIG. 5 with the cartridge removed; FIG. 8 is a top view of FIG. 7; referring to fig. 5 to 8, the square fixing frame 11 of the present embodiment is formed by cross-welding 8# channel steel 11.1 according to the inner width specification of the filter element 12 by 90 °, the front surface of the 8# channel steel 11.1 is a windward surface, the groove surface is a leeward surface, according to the external width specification of the filter element 12, fixing angle steel 11.2 and guide angle steel 11.3 are respectively arranged on the inner sides of four corners of the windward side of the square fixing frame 11, the windward side of the square fixing frame 11 is the front side of the 8# channel steel 11.1, the filter element fixing frame consisting of the fixing angle steel 11.2 and the guide angle steel 11.3 is used for placing the filter element 12, the front side of the 8# channel steel 11.1 surrounded by the four guide angle steel 11.3 forms a filter element base, fastening devices are respectively arranged between every two guide angle steels 11.3 and used for locking the filter element 12, the fastening devices are also arranged at the guide angle steels 11.3 arranged close to the edges, namely, fastening devices are respectively arranged at the leftmost guide angle steel and the rightmost guide angle steel; the fixed angle steel 11.2 is arranged on the outer side of the guide angle steel 11.3, the length of the fixed angle steel 11.2 is smaller than that of the guide angle steel 11.3, the guide angle steel 11.3 is fixedly welded with the fixed angle steel 11.2, the fixed angle steel 11.2 is fixedly welded with the front face of the 8# channel steel 11.1, and a gap of 2mm-5mm is reserved between the guide angle steel 11.3 and the 8# channel steel 11.1; the filter element 12 of the present embodiment has an inner width of 614mm × 614mm × 80mm, and the fixed angle steel 11.2 is outside the guide angle steel 11.3, and is short, and is perpendicular to the 8# channel steel 11.1 and welded and fixed, and the guide angle steel 11.3 is inside the fixed angle steel 11.2, and is long, and is welded and fixed with the fixed angle steel 11.2.

Referring to fig. 5, the fastening device includes a positioning plate 11.4, a fixing screw 11.5, and a central asymmetric plate 11.6, the left and right ends of the positioning plate 11.4 are respectively fixedly connected with guide angle steels 11.3, that is, the positioning plate 11.4 is supported and fixed by two guide angle steels 11.3, the fixing screw 11.5 is arranged at any end of the upper end surface of the positioning plate 11.4, the upper end surface of the positioning plate 11.4 is fixedly connected with the fixing screw 11.5, the central asymmetric plate 11.6 is provided with a screw hole matched with the fixing screw 11.5, and the central asymmetric plate and the fixing screw are matched to play a role of locking the filter element; the screw hole is located the non-centre of gravity department of central asymmetric board 11.6, the purpose that sets up like this makes central asymmetric board 11.6 not by under the fixed state of nut, remains vertically downwards all the time under the effect of gravity, makes things convenient for filter core 12 to impel direction angle steel 11.3, and can not blockked by central asymmetric board 11.6, after filter core 12 impeld direction angle steel 11.3, place central asymmetric board 11.6 rotation for the level, tighten up the nut, central asymmetric board 11.6 just compresses tightly the surface of filter core 12, makes it fixed.

Referring to fig. 7, when the fastening device is disposed at the side-by-side position, that is, when the fastening device is disposed at the leftmost side or the rightmost side, one end of the positioning plate 11.4 is fixedly connected to the guide angle 11.3, and the other end of the positioning plate 11.4 is fixedly connected to the support angle 11.7, that is, the positioning plate 11.4 is fixed by the guide angle 11.3 and the support angle 11.7; support angle steel 11.7 of here has two effects, first is fixed positioning plate 11.4, second is the central asymmetric board 11.6 when being used for supporting the locking, because central asymmetric board 11.6 one end compresses tightly filter core 12 when being in the edge, the other end just can be unsettled, just can not realize locking, consequently, support angle steel 11.7 plays the effect of the central asymmetric board 11.6 other end of support, and support angle steel 11.7 sets up on the same horizontal plane with filter core 12, thereby guarantee that the both ends of central asymmetric board 11.6 can steadily lock, support angle steel 11.7 and 8# channel-section steel 11.1's front welded fastening.

A filter element 12 is correspondingly arranged in each square fixing frame 11, four corners of the filter element 12 are matched with four guide angle steels 11.3 of the square fixing frame 11, an outer frame on the back of the filter element 12 is in sealing connection with the windward side of the square fixing frame 11 through a sealing strip 12.1, namely, the outer frame on the back of the filter element 12 is in sealing connection with a filter element base formed on the front of an 8# channel steel 11.1 enclosed by the four guide angle steels 11.3 through the sealing strip 12.1, and the front of the filter element 12 is locked and fixed through four fastening devices; the front surface of the filter element 12 faces the windward side, and the windward side of the filter element 12 faces the direction of the conical air inlet 1.

FIG. 9 is another schematic structural view of a square fixing frame; FIG. 10 is a top view of FIG. 9; as shown in fig. 9 and 10, the square fixing frame 11 of the present invention may also be formed by 90 ° cross welding of the flat tube 11.10 according to the outer width specification of the filter element 12, the narrow side of the flat tube 11.10 is windward side and leeward side, the wide side of the flat tube 11.10 is in the depth direction, the inside of the flat tube 11.10 is provided with an angle steel frame 11.11, a right-angle side of the angle steel frame 11.11 is fixedly connected with the inside of the flat tube 11.10, and the other right-angle side of the angle steel frame 11.11 forms a filter element base 11.12 for placing the filter element; fastening devices are respectively arranged at four corners of the windward side close to the square fixing frame 11, the windward side of the square fixing frame 11 is a narrow side of the flat tube 11.10, and the filter element base 11.12 is arranged on the leeward side of the square fixing frame 11.

Corresponding to a square fixing frame 11 consisting of a flat tube 11.10, the fastening device comprises a fixing screw rod 11.5 and a central asymmetric plate 11.6, the fixing screw rod 11.5 is welded on the central line of the windward side of the flat tube 11.10, the central asymmetric plate 11.6 is provided with a screw hole matched with the fixing screw rod 11.5, and the central asymmetric plate 11.6 is matched with the fixing screw rod 11.5 to play a role of locking the filter element 12; the screw hole is located the non-centre of gravity department of central asymmetric board 11.6, and the purpose that sets up like this makes central asymmetric board 11.6 not under the fixed state of nut, remains vertically downwards all the time under the effect of gravity, makes things convenient for filter core 12 to impel flat expert 11.10 inboard, and can not blockked by central asymmetric board 11.6, after filter core 12 impeld flat expert 11.10 inboard, places central asymmetric board 11.6 rotation for the level, tightens up the nut, just can fix filter core 12.

When the fastening device is arranged at the position close to the side, namely the fastening device is arranged at the leftmost side or the rightmost side, the wind-proof structure further comprises support angle steel 11.7, the support angle steel 11.7 is fixed on the windward side of the flat through 11.10, the support angle steel 11.7 plays a role of supporting the other end of the central asymmetric plate 11.6, and the support angle steel 11.7 is arranged on the same horizontal plane with the filter element 12, so that the two ends of the central asymmetric plate 11.6 can be stably locked.

Correspond in every square mount 11 and set up a filter core 12, the four corners of filter core 12 coincide with flat expert 11.10 inboard four corners, the frame at the back of filter core 12 passes through sealing strip 12.1 and another right-angle side sealing connection of angle steel frame 11.11, promptly with the filter core base 11.12 sealing connection who forms, the front of filter core 12 is fixed through four fastener locking.

In this embodiment, x is 4, y is 2, so the number of the filter elements 12 in one isosceles trapezoid vertical surface 9 is 4 × 2+4 × 2 is 16, and the first filter segment 4 and the second filter segment 5 respectively include five isosceles trapezoid vertical surfaces 9, so the number of the filter elements 12 in each filter segment is 16 × 5 — 80, and the number of the filter elements 12 in the whole large central high efficiency air filter is 80+80 — 160.

The filter element 12 can be a square body or a rectangular body, the thickness can be different, and when the filter element 12 is rectangular, the corresponding square fixing frame 11 is also rectangular; when the filter element 12 needs to be replaced, the surface of the single-layer assembly vertical surface 10 close to the conical purified gas outlet 3 is sealed by utilizing a fixing plate and sealant, each square fixing frame 11 of the single-layer assembly vertical surface 10 is cleaned before an old filter element is taken down and a new filter element is installed, the fixing plate and the sealant are removed after the new filter element is installed, and the problems of leakage and pollution can be strictly controlled in the whole filter element replacing process.

In a word, the utility model has the following advantages:

(1) the invention is positioned at the front end of the air supply pipeline, and the pollution in the process of disassembling, disassembling and assembling the filter element during replacement can be easily and effectively controlled, and the pipeline and a clean workshop can not be polluted.

(2) The air supply pipeline is always kept clean, and secondary pollution is avoided.

(3) And in a centralized filtering mode, when the negative pressure value of each filter element is unbalanced, the high-efficiency air filter can automatically balance to ensure that air supply of each air supply outlet is balanced.

(4) The negative pressure value of the high-efficiency air filter is extremely easy to detect, the using working condition is clear at a glance, and the management is convenient and efficient; the service life of the filter element can completely adopt a longest service life calculation method, namely, the whole negative pressure value of the large-scale central efficient air filter reaches a saturation value, the replacement time of the filter element is determined, and a large amount of consumables are saved.

(5) The occupied space is small.

Claims (10)

1. A large central high-efficiency air filter is characterized by comprising a conical air inlet, a rectangular shell and a conical purified air outlet, a first filter section and a second filter section are arranged in the rectangular shell, each filter section is provided with n filter elements, wherein n is more than or equal to 8 and less than or equal to 160, the upper and lower ends of the first filtering section and the second filtering section are respectively fixedly connected with the rectangular shell, an air inlet channel is arranged between the left end of the first filtering section and the rectangular shell, the right end of the first filtering section is fixedly connected with the rectangular shell, the left end of the second filtering section is fixedly connected with the rectangular shell, a clean channel is arranged between the right end of the second filtering section and the rectangular shell, the first filtering section and the second filtering section are separated by an S-shaped clapboard, the air inlet channel is communicated with the conical air inlet, and the clean channel is communicated with the conical clean air outlet; the filtering section is composed of w isosceles trapezoid vertical faces, w is more than or equal to 2, the single isosceles trapezoid vertical face is composed of two single-layer assembly vertical faces which are arranged in an isosceles trapezoid shape, a first sealing plate is arranged on the top edge of the isosceles trapezoid, the first sealing plate is fixedly connected with the two single-layer assembly vertical faces respectively, the bottom edge of the isosceles trapezoid is an air inlet, the air inlet is communicated with the conical air inlet, and every two isosceles trapezoid vertical faces are fixedly connected through a second sealing plate.

2. The large central high-efficiency air filter according to claim 1, wherein the single-layer collective facade comprises x rows and y columns of square fixing frames, wherein 24 is more than or equal to x and more than or equal to 2, 10 is more than or equal to y and more than or equal to 2, and a filter element is correspondingly arranged in each square fixing frame.

3. The large-scale central high-efficiency air filter as claimed in claim 2, wherein the square fixing frame is formed by cross welding channel steel according to the inner width specification of the filter element by 90 degrees, the front surface of the channel steel is a windward surface, the groove surface of the channel steel is a leeward surface, and fixing angle steel and guide angle steel are respectively arranged at four corners of the windward surface of the square fixing frame according to the outer width specification of the filter element for placing the filter element; the fixed angle steel is arranged on the outer side of the guide angle steel, the length of the fixed angle steel is smaller than that of the guide angle steel, the guide angle steel is fixedly welded with the fixed angle steel, the fixed angle steel is fixedly welded with the front face of the channel steel, and a gap of 2mm-5mm is reserved between the guide angle steel and the channel steel.

4. The large central high-efficiency air filter according to claim 3, wherein the fastening device comprises a positioning plate, a fixing screw and a central asymmetric plate, the left end and the right end of the positioning plate are fixedly connected with the guide angle steel respectively, the fixing screw is arranged at any end of the upper end surface of the positioning plate, the upper end surface of the positioning plate is fixedly connected with the fixing screw, the central asymmetric plate is provided with a screw hole matched with the fixing screw, and the central asymmetric plate and the fixing screw are matched to play a role in locking the filter element.

5. The large central high-efficiency air filter according to claim 4, wherein when the fastening device is arranged at the position close to the edge, one end of the positioning plate is fixedly connected with the guide angle steel, the other end of the positioning plate is fixedly connected with the support angle steel, and the support angle steel is fixedly welded with the front face of the channel steel.

6. The large central high-efficiency air filter as claimed in claim 2, wherein the square fixing frame is formed by cross welding of a flat through according to the outer width specification of the filter element by 90 degrees, an angle steel frame is arranged at the inner side of the flat through, one right-angle side of the angle steel frame is fixedly connected with the inner side of the flat through, and the other right-angle side of the angle steel frame forms a filter element base for placing the filter element; and fastening devices are respectively arranged at four corners close to the windward side of the square fixing frame.

7. The large central high-efficiency air filter according to claim 6, wherein the fastening device comprises a fixing screw rod and a central asymmetric plate, the fixing screw rod is welded on the windward side of the flat-through, the central asymmetric plate is provided with a screw hole matched with the fixing screw rod, and the central asymmetric plate and the fixing screw rod are matched to play a role in locking the filter element; when the fastening device is arranged at the position close to the side, the wind-resistant flat-through wind-facing device further comprises a support angle steel, and the support angle steel is fixed on the flat-through wind-facing surface.

8. The large-scale central high-efficiency air filter according to claim 3 or 5, wherein a filter element is arranged in each square fixing frame, an outer frame on the back of the filter element is hermetically connected with the square fixing frame through a sealing strip, and the front of the filter element is locked and fixed through four fastening devices; the filter element is arranged on the air inlet side of the air inlet, and the filter element is arranged on the air inlet side of the air inlet.

9. The large central air cleaner according to claim 1, wherein the S-shaped partition plates are each formed by fixedly connecting three partition plates.

10. The large central air cleaner according to claim 1, wherein access doors are provided on the left and right sides of said rectangular housing.

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