CN220834640U - Filter unit and filter box thereof - Google Patents

Abstract

A filter unit and a filter box, wherein the filter unit comprises a filter module and a filter material amplification module; the filter module is provided with an outer filter assembly and an inner filter assembly, and a filter space is formed between the outer filter assembly and the inner filter assembly; the filter material amplification module is combined with one of the outer side filter assembly and the inner side filter assembly, and is provided with an expansion space communicated with the filter space; the filter box comprises the filter unit and a fixing unit, wherein the fixing unit comprises a plurality of fixing side frames and a mounting frame, each two fixing side frames are respectively assembled on two sides of the filter module to fix the outer side filter assembly and the inner side filter assembly, and the filter unit is fixed in the mounting frame through the fixing side frames, so that the volume of the inner space of the filter unit is increased, and the filter efficiency is improved.

Description

Filter unit and filter box thereof

Technical Field

The utility model relates to an air filtering technology, in particular to a filtering unit and a filtering box thereof.

Background

In many current manufacturing fields of photoelectric, precision and semiconductor industries, in order to meet the production requirements of products, the production and the manufacture are generally performed in clean, pollution-free and environment-isolated dust-free spaces.

The environment in the dust-free space is usually provided with a fan and air filtering equipment at the air inlet, so that the air flow is driven by the fan and filtered by the air filtering equipment, and suspended matters in the air flow are prevented from entering the dust-free space.

Generally speaking, the basic structure of a filter assembly in an air filtering apparatus includes two sheet filter materials and a filter material disposed between the two filter materials, and the inner space of the filter assembly is formed according to the distance between the two filter materials, and the two filter materials do not have an area of expansion, so that the inner space volume of the filter assembly is limited by the shapes of the two filter materials, and therefore, the filling amount of the filter material cannot be increased, the service life of the filter assembly is reduced, and the replacement cost of the filter assembly is wasted.

Disclosure of utility model

In view of the above, the present utility model is directed to a filter unit and a filter box thereof, which increase the internal space volume of the filter unit, thereby improving the filtering efficiency and prolonging the service life.

In order to achieve the above objective, the present utility model provides a filtering unit, comprising a filtering module and a filtering material amplifying module; the filter module is provided with an outer filter assembly and an inner filter assembly, and the outer filter assembly and the inner filter assembly are arranged at intervals to form a filter space; the filter material amplification module is combined with one of the outer side filter assembly and the inner side filter assembly in the filter module, and an expansion space is formed in the filter material amplification module corresponding to the filter module and communicated with the filter space.

In one embodiment, the filter media amplifying module includes at least one first amplifying portion and at least one second amplifying portion, the first amplifying portion is integrally formed on the outer filter element, and the second amplifying portion is integrally formed on the inner filter element.

In one embodiment, the outer filter assembly has an outer filter surface, the inner filter assembly has an inner filter surface, the first amplifying portion and the second amplifying portion are respectively combined on the outer filter surface and the inner filter surface in a concave-convex structure, and the expansion space is formed between the first amplifying portion and the second amplifying portion.

In one embodiment, the first amplifying part has a convex section protruding outwards relative to the outer filter surface, and the first amplifying part forms a containing groove at the inner side of the convex section, and the second amplifying part has a concave section recessed into the containing groove relative to the inner filter surface towards the convex section of the first amplifying part.

In one embodiment, two sides of the outer filter surface are provided with two first side ends, a first straight end of the outer filter surface is connected with the two first side ends, the first amplifying part is formed on the outer filter surface by connecting the two first side ends corresponding to the extending direction of the first straight end, and a plurality of outer filter sections are formed on two sides of the first amplifying part by separating the first amplifying part by the outer filter surface; the two sides of the inner filter surface are provided with two second side ends, the inner filter surface is provided with a second straight end which is connected with the two second side ends, the second amplifying part is formed on the inner filter surface by connecting the two second side ends in the extending direction of the second straight end, and a plurality of inner filter sections are formed on the two sides of the second amplifying part by separating the second amplifying part, wherein the inner filter sections and the outer filter sections face each other.

In one embodiment, the first amplifying part has two first bonding sections corresponding to two first side ends on the same side of the outer filter surface, the second amplifying part has two second bonding sections corresponding to two second side ends on the same side of the inner filter surface, and the two first bonding sections and the two second bonding sections are abutted against each other.

In one embodiment, the outer filter assembly includes a first outer filter and a second outer filter, wherein one end of the first outer filter is combined with one end of the second outer filter, and the first outer filter and the second outer filter are respectively inclined outwards to form an open slot; the inner filter assembly is accommodated in the open groove of the outer filter assembly, the inner filter assembly comprises a first inner filter screen and a second inner filter screen, one end of the first inner filter screen is combined with one end of the second inner filter screen, and the first inner filter screen and the second inner filter screen respectively correspond to the first outer filter screen and the second outer filter screen and incline outwards, so that a first filter space is formed between the first outer filter screen and the first inner filter screen, and a second filter space is formed between the second outer filter screen and the second inner filter screen.

In one embodiment, the outer filter assembly includes a base filter, and two sides of the base filter are respectively combined with the first outer filter and the second outer filter; the inner side filter component comprises a connecting filter screen, the connecting filter screen faces the base filter screen, two sides of the connecting filter screen are respectively combined with the first inner side filter screen and the second inner side filter screen, a communication space is formed between the connecting filter screen and the base filter screen, and the first filter space and the second filter space are mutually communicated through the communication space.

In one embodiment, the outer filter assembly has a plurality of outer joints, and the outer joints are respectively arranged at two first side ends of the outer filter surface corresponding to the outer filter sections; the inner filter assembly is provided with a plurality of inner combining parts, the inner combining parts are respectively arranged at two second side ends of the inner filter surface corresponding to the inner filter sections, and the outer combining parts are mutually combined with the inner combining parts.

The utility model provides a filter box provided by another embodiment, which comprises the filter unit and a fixing unit; the filter unit is fixed by the fixing unit, the fixing unit comprises a plurality of fixing side frames and a mounting frame, each two fixing side frames are respectively assembled on two sides of the filter module to fix the outer side filter assembly and the inner side filter assembly, the mounting frame is provided with a mounting space, and the fixing side frames are locked by the mounting frame so that the filter unit is fixed in the mounting space of the mounting frame through the fixing side frames.

In one embodiment, each two fixing side frames are respectively fixed at two sides of the outer side filtering component, and each fixing side frame comprises a positioning plate, and the positioning plate is provided with a flange and abuts against the outer side filtering component. Further, the flange comprises two side edges, a bottom edge and a top edge, wherein the two side edges are provided with two side check blocks for being abutted against the peripheries of the outer filter surfaces of the first outer filter screen and the second outer filter screen, the bottom edge is provided with a connecting check block for connecting the two side check blocks, and the connecting check block is correspondingly abutted against the periphery of the base filter screen.

In one embodiment, the mounting frame has two mounting struts, the plurality of filter units are adjacently juxtaposed between the two mounting struts, and each filter unit is secured to the two mounting struts by two securing side frames.

The utility model has the advantages that the filter unit is provided with the expansion space corresponding to the inside of the filter module through the structural design of the filter module and the filter material expansion module, so that the volume of the internal space of the filter unit is increased, the filling quantity of the filter material in the filter unit is further increased, the filtering efficiency of the filter box is further improved, the service lives of the filter units are prolonged, and the aim of saving the replacement cost of the filter unit is fulfilled.

Drawings

Fig. 1 is a perspective view of a filter unit according to a first preferred embodiment of the present utility model.

Fig. 2 is an exploded view of the structure of the filter unit according to the first preferred embodiment of the present utility model.

Fig. 3 is a side view of the outer filter assembly of the filter unit of the first preferred embodiment of the present utility model.

Fig. 4 is a side view of an inner filter assembly of the filter unit according to the first preferred embodiment of the present utility model.

Fig. 5 is a front view of a filter unit according to a first preferred embodiment of the present utility model.

Fig. 6 is a schematic cross-sectional view of a filter unit according to a first preferred embodiment of the utility model.

Fig. 7 is a partial enlarged view of a mark a in fig. 6.

Fig. 8A is a schematic diagram of another embodiment of a surface area enlarging portion in a filter unit according to the first preferred embodiment of the utility model.

Fig. 8B is a schematic view of another embodiment of the surface area enlarging portion in the filter unit according to the first preferred embodiment of the utility model.

Fig. 9 is a perspective view of a filter box according to a second preferred embodiment of the present utility model.

Fig. 10 is a structural exploded view of a filter box according to a second preferred embodiment of the present utility model.

Fig. 11 is an exploded view showing a structure of a fixed side plate and a filter unit in a filter box according to a second preferred embodiment of the present utility model.

Fig. 12 is a partial front view of a filter box according to a second preferred embodiment of the present utility model.

Fig. 13 is a partial top view of a filter box according to a second preferred embodiment of the present utility model.

Fig. 14 is a partial bottom view of a filter box according to a second preferred embodiment of the present utility model.

Fig. 15 is a schematic partial cross-sectional view of a filter box according to a second preferred embodiment of the present utility model.

Reference numerals illustrate:

100: filter box

10: Filtering unit

11: Filtering module

111: Outside filter assembly

111A: first outside filter screen

111B: second outside filter screen

111C: base filter screen

111D: open groove

112: Inner filter assembly

112A: first inner side filter screen

112B: second inner side filter screen

112C: connecting filter screen

112D: open space

113: Outside filter surface

113A: outside filter section

1131: First side end

1132: A first straight end

114: Outside joint

115: Outside fixing part

116: Inner filter surface

116A: inner filter section

1161: Second side end

1162: A second straight end

117: Inside joint

12: Filter material amplification module

121: First amplification part

121A: convex section

121B: first combined section

122: Second amplification part

122A: concave section

122B: second combined section

20: Fixing unit

21: Fixed side frame

211: Positioning plate

2111: Side edge

2112: Bottom edge

2113: Top edge

212: Side stop block

213: Joint block

214: Alignment hole

22: Mounting frame

221: Mounting strut

2211: Lock hole

222: Connecting strut

223: Installation space

23: Cover plate

231: First cover plate

2311: Covering frame

2312: Connecting rod

232: Second cover plate

S: filtration space

S1: a first filtering space

S2: a second filtering space

S3: communication space

P: expanding space

1: Filter material

Detailed Description

In order to more clearly illustrate the present utility model, preferred embodiments are described in detail below with reference to the accompanying drawings. Fig. 1 and 2 show a first preferred embodiment of the present utility model, providing a basic construction of a filter unit 10.

The filter unit 10 provided in the first embodiment includes a filter module 11 and a filter material amplification module 12.

The filter module 11 has an outer filter element 111 and an inner filter element 112, wherein the outer filter element 111 and the inner filter element 112 are spaced apart from each other, such that a filter space S is formed between the outer filter element 111 and the inner filter element 112, and the filter space S is filled with a filter medium 1 (see fig. 15). In this embodiment, the outer filter element 111 and the inner filter element 112 may be, but are not limited to, a plate with a plurality of filter holes on a part of the surface area.

Referring to fig. 2 and 3, the detailed structure of the outer filter assembly 111 is described, the outer filter assembly 111 has an outer filter surface 113, wherein the outer filter assembly 111 includes a first outer filter 111a and a second outer filter 111b, one end of the first outer filter 111a is combined with one end of the second outer filter 111b, in this embodiment, the outer filter assembly 111 includes a base filter 111c, two sides of the base filter 111c are respectively combined with the first outer filter 111a and the second outer filter 111b, that is, the first outer filter 111a and the second outer filter 111b are combined with each other through the base filter 111c, wherein the first outer filter 111a and the second outer filter 111b are respectively inclined outwards, and the first outer filter 111a, the second outer filter 111b and the base filter 111c enclose an open slot 111d.

Specifically, the first outer filter 111a and the second outer filter 111b have the outer filter surface 113, as shown in fig. 3, two sides of the outer filter surface 113 have two first side ends 1131, the top side of the outer filter surface 113 has a first flat end 1132 connected to the two first side ends 1131, as shown in fig. 2, 3 and 5, the first outer filter 111a and the second outer filter 111b have a plurality of outer connecting portions 114, respectively, the plurality of outer connecting portions 114 are respectively provided at two first side ends 1131 of the outer filter surface 113, and the plurality of outer connecting portions 114 extend inward toward the open groove 111d with respect to the outer filter surface 113, wherein two ends of the base filter 111c have two outer fixing portions 115, the two outer fixing portions 115 extend upward toward the open groove 111d, and the two outer fixing portions 115 are adjacent to the outer filter 114 of the first outer filter 111a and the second outer filter 111 b.

Referring to fig. 2 and 4, the detailed structure of the inner filter assembly 112 is described, the inner filter assembly 112 has an inner filter surface 116, wherein the inner filter assembly 112 is received in the open slot 111d of the outer filter assembly 111, the inner filter assembly 112 includes a first inner filter 112a and a second inner filter 112b, one end of the first inner filter 112a is combined with one end of the second inner filter 112b, in this embodiment, the inner filter assembly 112 includes a connecting filter 112c, the connecting filter 112c faces the base filter 111c, and two sides of the connecting filter 112c are combined with the first inner filter 112a and the second inner filter 112b, that is, the first inner filter 112a and the second inner filter 112b are combined together through the connecting filter 112c, wherein the first inner filter 112a and the second inner filter 112b are respectively inclined outwards corresponding to the first outer filter 111a and the second outer filter 111 b.

As shown in fig. 5 to 7, a first filtering space S1 is formed between the first outer filter 111a and the first inner filter 112a, a second filtering space S2 is formed between the second outer filter 111b and the second inner filter 112b, at this time, a communication space S3 is formed between the connecting filter 112c and the base filter 111c, the first filtering space S1 and the second filtering space S2 are mutually communicated through the communication space S3, an open space 112d is formed between the first inner filter 112a and the second inner filter 112b in the inner filter assembly 112, and the open space 112d can be communicated with the filtering space S inside the filter module 11 through the filter holes of the inner filter assembly 112.

Specifically, the first inner filter mesh 112a and the second inner filter mesh 112b have the inner filter surface 116, as shown in fig. 4, two second side ends 1161 are disposed on two sides of the inner filter surface 116, a second flat end 1162 is disposed on a top side of the inner filter surface 116 and connected to the two second side ends 1161, as shown in fig. 2, 4 and 5, the first inner filter mesh 112a and the second inner filter mesh 112b have a plurality of inner connecting portions 117, the plurality of inner connecting portions 117 are disposed on two second side ends 1161 of the inner filter surface 116, and each inner connecting portion 117 is correspondingly connected to an inner wall of each outer connecting portion 114, thereby the outer filter assembly 111 and the inner filter assembly 112 are combined to form the filtering space S.

The filter material amplifying module 12 is combined with one of the outer filter element 111 and the inner filter element 112 in the filter module 11, the filter material amplifying module 12 has an expansion space P corresponding to the inside of the filter module 11 and is communicated with the filter space S, the expansion space P is also used for filling the filter material (not shown in the drawings), as shown in fig. 2 to 5, in the present embodiment, the filter module 11 and the filter material amplifying module 12 are integrally formed by punching, the filter material amplifying module 12 includes a plurality of first amplifying parts 121 and a plurality of second amplifying parts 122, the first amplifying parts 121 are respectively integrally formed on a first outer filter screen 111a and a second outer filter screen 111b of the outer filter element 111, the second amplifying parts 122 are respectively integrally formed on a first inner filter screen 112a and a second inner filter screen 112b of the inner filter element 112, and the first amplifying parts 121 and the second amplifying parts 122 are respectively formed on a first inner filter screen 112a and a second inner filter screen 112b, so that the air can pass through the expansion space P.

In other embodiments, the filter amplification module 12 may be adjusted according to the structural requirement, for example, at least one of the first amplification part 121 and the second amplification part 122 in the filter amplification module 12, or one of the first amplification part 121 and the second amplification part 122 may be omitted from the filter amplification module 12, so long as the filter amplification module 12 can form the expansion space P on the outer filter element 111 or the inner filter element 112; the filter material amplification module 12 and the filter module 11 are not limited to be integrally formed, and the filter material amplification module 12 may be disposed on the outer filter element 111 or the inner filter element 112 of the filter module 11 by other combination methods, so long as the expansion space P is communicated with the filter space S.

Referring to fig. 2 to 7, in the present embodiment, the first amplifying portion 121 and the second amplifying portion 122 are respectively combined on the outer filtering surface 113 and the inner filtering surface 116 in a concave-convex structure, as shown in fig. 6 and 7, the first amplifying portion 121 has a convex section 121a, the convex section 121a protrudes outwards relative to the outer filtering surface 113, a container is formed inside the convex section 121a by the first amplifying portion 121, the second amplifying portion 122 has a concave section 122a, the concave section 122a is recessed into the container toward the convex section 121a of the first amplifying portion 121 relative to the inner filtering surface 116, thereby the first amplifying portion 121 and the second amplifying portion 122 form rectangular concave-convex pairing, and the expansion space P is formed between the first amplifying portion 121 and the second amplifying portion 122, so that the volume of the internal space of the filter unit 10 is increased, and the filling amount of the filter unit 10 is filled with the filler.

In other embodiments, the concave-convex configuration of the first amplifying section 121 and the second amplifying section 122 may be adjusted to other configurations according to the requirement, as shown in fig. 8A and 8B, and the first amplifying section 121' and the second amplifying section 122' in the filter material amplifying module 12' may be optionally paired in an angular or arc shape; or the first amplification part 121 may be alternatively disposed on the inner filter assembly 112, and the second amplification part 122 may be alternatively disposed on the outer filter assembly 111; in addition, the first amplifying portion 121 and the second amplifying portion 122 are designed as protruding portions, and the first amplifying portion 121 and the second amplifying portion 122 may be arranged in a staggered manner.

As shown in fig. 2 and 3, the first amplifying portion 121 is formed on the outer filtering surface 113 corresponding to the extending direction of the first straight end 1132 to connect the two first side ends 1131, and the first amplifying portion 121 has two first connecting sections 121b corresponding to the two first side ends 1131 on the same side of the outer filtering surface 113, and the outer filtering surface 113 is divided by the first amplifying portion 121 to form a plurality of outer filtering sections 113a on two sides of the first amplifying portion 121.

As shown in fig. 2 and 4, the second amplifying portion 122 is formed on the inner filter surface 116 corresponding to the extending direction of the second straight end 1162 to connect the two second side ends 1161, and the second amplifying portion 122 has two second bonding sections 122b corresponding to the two second side ends 1161 on the same side of the inner filter surface 116, the two first bonding sections 121b and the two second bonding sections 122b are abutted against each other, and at this time, the inner filter surface 116 is formed by separating the second amplifying portion 122 to form a plurality of inner filter sections 116a on two sides of the second amplifying portion 122, and the plurality of inner filter sections 116a and the plurality of outer filter sections 113a face each other; as described above, the first amplification unit 121 and the second amplification unit 122 are designed to effectively amplify the internal space of the filter unit 10, but are not limited thereto.

Therefore, the filter unit 10 increases the volume of the internal space of the filter unit 10 by the structural design of the filter module 11 and the filter material amplifying module 12, and the filter material amplifying module 12 is formed with the expanding space P corresponding to the inside of the filter module 11, so as to further amplify the filling amount of the filter material in the filter unit 10, thereby improving the filtering efficiency of the filter unit 10, and further improving the service life of the filter unit 10 and further reducing the replacement cost of the filter unit 10 due to the effective increase of the filled filter material.

Referring to fig. 9 to 15, a second preferred embodiment of the present utility model is shown, in order to provide a basic structure of a filter box 100, wherein the filter box 100 comprises a plurality of filter units 10 and a fixing unit 20.

The basic structure of the plurality of filter units 10 is the same as that described in the foregoing first embodiment, and the filter units 10 include the filter module 11 and the filter material amplifying module 12, where the outer filter assembly 111 and the inner filter assembly 112 of the filter module 11 are spaced apart to form the filter space S; the filter material amplifying module 12 is combined with one of the outer filter element 111 and the inner filter element 112 in the filter module 11, the filter material amplifying module 12 has the expansion space P corresponding to the inside of the filter module 11, the expansion space P is communicated with the filter space S, and fig. 15 shows that the expansion space P and the filter space S in the inside of each filter unit 10 are filled with the filter material 1, so that the filter material amplifying module 12 increases the volume of the inner space of the filter unit 10 correspondingly, and further increases the filling amount of the filter material 1 in the filter unit 10, thereby improving the filtering efficiency of the filter unit 10.

The details of the filter module 11 and the filter material amplification module 12 in the filter unit 10 according to the second embodiment are the same as those of the filter unit 10 according to the first embodiment; in addition, in other embodiments, the number of filter units 10 in the filter box 100 may be adjusted as desired.

The fixing unit 20 is used for positioning the plurality of filtering units 10, and the fixing unit 20 comprises a plurality of fixing side frames 21, a mounting frame 22 and a plurality of cover plates 23.

As shown in fig. 9 to 11, each two fixing side frames 21 are respectively assembled on two sides of the filter module 11 to fix the outer filter assembly 111 and the inner filter assembly 112, in this embodiment, each two fixing side frames 21 are respectively fixed on two sides of the outer filter assembly 111, wherein each fixing side frame 21 includes a positioning plate 211, and the positioning plate 211 is abutted against the outer joint portion 114 of the outer filter assembly 111 to cover two sides of the open space 112d of the inner filter assembly 112; further, the positioning plate 211 has a flange that abuts against the outer filter element 111 to support the outer filter element 111, in this embodiment, as shown in fig. 10, 11 and 14, the flange of the positioning plate 211 includes two side edges 2111, a bottom edge 2112 and a top edge 2113, the two side edges 2111 have two side stoppers 212 that abut against the peripheral edges of the outer filter surface 113 of the first outer filter screen 111a and the second outer filter screen 111b in the outer filter element 111, the bottom edge 2112 has a connection stopper 213 (refer to fig. 11 and 14), the connection stopper 213 connects the two side stoppers 212, the connection stopper 213 abuts against the peripheral edge of the base filter screen 111c correspondingly, the top edge 2113 has a plurality of alignment holes 214, and the plurality of alignment holes 214 are in communication with the open space 112d between the first inner filter screen 112a and the second inner filter screen 112b in the inner filter element 112.

The installation frame 22 has two installation struts 221 and two connection struts 222, the two installation struts 221 and the two connection struts 222 are combined to form an installation space 223, as shown in fig. 9 and 10, the plurality of filter units 10 are adjacently arranged between the two installation struts 221, and two adjacent filter units 10 are adjacently abutted with the first outer filter screen 111a of one filter module 11 and the second outer filter screen 111b of the other filter module 11, as shown in fig. 10 to 12, a plurality of locking holes 2211 are formed on each installation strut 221 corresponding to the alignment holes 214 of each fixed side frame 21 for a locking member (not shown) to pass through, so that the installation frame 22 is locked with the plurality of fixed side frames 21, the plurality of filter units 10 are fixed on the two installation struts 221 by each two fixed side frames 21, and the plurality of filter units 10 are positioned in the installation space 223 of the installation frame 22.

As shown in fig. 10, 13 and 15, the cover 23 covers the top opening of each filter module 11, in this embodiment, the cover 23 includes a plurality of first covers 231 and at least one second cover 232, each first cover 231 has two cover frames 2311 and two connecting rods 2312, the two cover frames 2311 are disposed parallel to each other, the two connecting rods 2312 are respectively connected to the two cover frames 2311, one cover frame 2311 is clamped between the inner side filter assembly 112 of one filter unit 10 adjacent to the mounting frame 22 and the connecting strut 222, the other cover frame 2311 is clamped between the inner side filter assembly 112 of the adjacent filter unit 10 and the inner side filter assembly 112 of the other filter unit 10 relative to the connecting strut 222, the second cover 232 is located between the plurality of first covers 231, the second cover 232 is clamped between the first inner side filter screen 112a of any adjacent filter unit 10 and the second inner side filter screen 112b of the other filter unit 10, besides positioning the adjacent filter unit 10, the other cover frame 2311 can be prevented from directly entering the filter module 11 through the connecting strut 221 and can be detached from the top opening (the top opening of the filter module 23).

Therefore, in the structural design of the filtering unit 10 in the filtering box 100, the filtering material amplifying module 12 can increase the volume of the internal space of the filtering unit 10, so as to amplify the filling amount of the filtering material 1 in the filtering unit 10, and in addition, the filtering box 100 can increase the filtering surface area and the cross-sectional area of the gas passing through, so as to reduce the pressure loss, further improve the filtering efficiency of the filtering box 100, prolong the service life of the filtering units 10, and achieve the purpose of saving the replacement cost of the filtering units 10.

The foregoing description is only illustrative of the preferred embodiments of the utility model, and is therefore intended to cover all modifications that fall within the true scope of the utility model as defined by the following claims.

Claims (11)

1. A filter unit comprising:

The filter module is provided with an outer filter assembly and an inner filter assembly, and the outer filter assembly and the inner filter assembly are arranged at intervals to form a filter space; and

The filter material amplification module is combined with one of the outer side filter assembly and the inner side filter assembly in the filter module, and an expansion space is formed in the filter material amplification module corresponding to the filter module and is communicated with the filter space.

2. The filter unit of claim 1, wherein the filter media expansion module comprises at least a first expansion portion and at least a second expansion portion, the first expansion portion being integrally formed on the outer filter element, the second expansion portion being integrally formed on the inner filter element.

3. The filter unit of claim 2, wherein the outer filter element has an outer filter surface, the inner filter element has an inner filter surface, the first and second amplification parts are coupled to the outer filter surface and the inner filter surface, respectively, in a concave-convex configuration, and the expansion space is formed between the first and second amplification parts.

4. A filter unit according to claim 3, wherein the first amplification part has a convex section protruding outwardly with respect to the outer filter surface, and the first amplification part forms a receptacle inside the convex section, and the second amplification part has a concave section recessed into the receptacle with respect to the inner filter surface toward the convex section of the first amplification part.

5. A filter unit according to claim 3, wherein the outer filter surface has two first side ends on both sides thereof, and a first flat end is provided on the outer filter surface to connect the two first side ends, the first amplification section is formed on the outer filter surface in correspondence with the extending direction of the first flat end to connect the two first side ends, and the outer filter surface is divided by the first amplification section to form a plurality of outer filter sections on both sides of the first amplification section; the two sides of the inner filter surface are provided with two second side ends, the inner filter surface is provided with a second straight end which is connected with the two second side ends, the second amplifying part is formed on the inner filter surface by connecting the two second side ends in the extending direction of the second straight end, and a plurality of inner filter sections are formed on the two sides of the second amplifying part by separating the second amplifying part, wherein the inner filter sections and the outer filter sections face each other.

6. The filter unit of claim 5, wherein the first amplification part has two first coupling sections corresponding to two first side ends on the same side as the outer filter surface, and the second amplification part has two second coupling sections corresponding to two second side ends on the same side as the inner filter surface, and the two first coupling sections and the two second coupling sections are abutted against each other.

7. The filter unit of claim 5, wherein the outer filter assembly comprises a first outer screen and a second outer screen, wherein one end of the first outer screen is combined with one end of the second outer screen, and the first outer screen and the second outer screen are respectively inclined outwards to form an open slot; the inner filter assembly is accommodated in the open groove of the outer filter assembly, the inner filter assembly comprises a first inner filter screen and a second inner filter screen, one end of the first inner filter screen is combined with one end of the second inner filter screen, and the first inner filter screen and the second inner filter screen respectively correspond to the first outer filter screen and the second outer filter screen and incline outwards, so that a first filter space is formed between the first outer filter screen and the first inner filter screen, and a second filter space is formed between the second outer filter screen and the second inner filter screen.

8. The filter unit of claim 7, wherein the outer filter assembly comprises a base screen, two sides of the base screen being respectively coupled to the first outer screen and the second outer screen; the inner side filter component comprises a connecting filter screen, the connecting filter screen faces the base filter screen, two sides of the connecting filter screen are respectively combined with the first inner side filter screen and the second inner side filter screen, a communication space is formed between the connecting filter screen and the base filter screen, and the first filter space and the second filter space are mutually communicated through the communication space.

9. A filtration tank comprising:

At least one filter unit according to any one of claims 1 to 8, comprising a filter module and a filter material amplification module, the filter module having an outer filter element and an inner filter element, the outer filter element being spaced apart from the inner filter element to form a filter space between the outer filter element and the inner filter element; the filter material amplification module is combined with one of the outer side filter assembly and the inner side filter assembly in the filter module, and an expansion space which is communicated with the filter space is arranged in the filter material amplification module corresponding to the filter module; and

The fixing unit comprises a plurality of fixing side frames and a mounting frame, each two fixing side frames are respectively assembled on two sides of the filter module to fix the outer side filter assembly and the inner side filter assembly, the mounting frame is provided with a mounting space, and the mounting frame is connected with the plurality of fixing side frames so that the filter unit is fixed in the mounting space of the mounting frame through the plurality of fixing side frames.

10. The filter box of claim 9, wherein each two fixed side frames are respectively fixed on two sides of the outer filter assembly, and each fixed side frame comprises a positioning plate, and the positioning plate has a flange which abuts against the outer filter assembly.

11. The filter housing of claim 9, wherein said mounting frame has two mounting struts, said filter elements being plural and adjacent and juxtaposed between said two mounting struts, each said filter element being secured to said two mounting struts by two securing side frames.