CN114405177A

CN114405177A - Filter structure and filter module for separating paint mist sprayed in air flow

Info

Publication number: CN114405177A
Application number: CN202210167093.1A
Authority: CN
Inventors: 孔飞; 林涛; 张川
Original assignee: China Automobile Industry Engineering Co Ltd; Scivic Engineering Corp
Current assignee: China Automobile Industry Engineering Co Ltd; Scivic Engineering Corp
Priority date: 2022-02-23
Filing date: 2022-02-23
Publication date: 2022-04-29

Abstract

The invention discloses a filter structure for separating paint mist passing through an air flow and a filter module comprising the filter structure. The filtering structure comprises a flat filtering material and a supporting piece for supporting the filtering material, the supporting piece is composed of two oppositely arranged side plates and a bottom plate for connecting the two side plates, the bottom ends of the two side plates are obliquely connected with the two opposite ends of the bottom plate, and dihedral angles are obtuse angles, so that an opening which is wide at the top and narrow at the bottom and used for receiving airflow to be filtered is formed between the two side plates; air holes through which air flows are formed on the two side plates, and the filter material is arranged on the inner sides of the two side plates and the bottom plate in a tiled mode; the edges of the air holes are outwards folded to form limiting plates, and the bottom end of each limiting plate is connected with a connecting plate on the outer side of the side plate in an inserting mode so as to keep the side plate in a vertical state. The filtering structure can process the filtered sprayed paint mist, is convenient to manufacture, and has low cost, low pressure loss and higher filtering efficiency.

Description

Filter structure and filter module for separating paint mist sprayed in air flow

Technical Field

The present invention relates to the field of filter devices, and more particularly, to a filter structure for separating paint mist from an air flow mixed with the paint mist generated by spraying and a filter module having the filter structure.

Background

In the process of spraying a workpiece after atomizing a paint by using a spray gun or an atomizer, a part of atomized paint particles adhere to a target workpiece, and the rest of the paint particles are scattered into the air in the vicinity and guided to a processing device along with the air flow in the spray chamber. One of the processing devices is a dry paint mist processing system in which a filter module is replaceable, and an air stream containing paint mist is guided through the filter module, and the filter module separates and adsorbs most of the paint mist particles. When the filtration module is saturated by adsorption, the saturated module can be taken out and replaced by a new module.

The design has lower pressure loss, higher filtration efficiency and enough holds more and pass the filtration module that spray paint fog and convenient preparation and cost are more reasonable simultaneously, is the problem that the technical person in the field will solve.

Disclosure of Invention

The invention aims to provide a filter structure for separating over-sprayed paint mist in air flow, which has lower pressure loss, high filter efficiency and can accommodate more over-sprayed paint mist, and a filter module with the filter structure.

In a first aspect of the present invention, a filtering structure for separating paint mist from an air flow is provided, which includes at least one supporting member and a flat filtering material fixed on the supporting member, wherein the supporting member includes a U-shaped structure and a connecting plate, the U-shaped structure is composed of two side plates oppositely arranged and a bottom plate connecting the two side plates, the bottom ends of the two side plates are obliquely connected with the two opposite ends of the bottom plate, and the two-surface angle is an obtuse angle, so that an opening with a wide top and a narrow bottom is formed between the two side plates for receiving the air flow to be filtered; the filter materials are arranged on the inner sides of the two side plates and the bottom plate in a tiled mode; at least two air holes are formed in each side plate, at least two edges of each air hole are respectively and perpendicularly folded to form a limiting plate, the limiting plates are used for limiting, supporting and fixing the supporting pieces on the outer sides, and the bottom end of each limiting plate is connected with the lower portion of the outer side of each side plate in an inserting mode so as to keep the vertical state of the connecting plate with the side plate.

Wherein, the bottom plate is provided with at least one air hole.

The top end of each side plate is preset at a preset distance from the top end of each side plate to the bottom plate, each side plate is hollowed out to form a plurality of triangular and/or trapezoidal holes which are separated from each other in the length direction of the bottom plate, the side plate materials on two opposite sides or one side of each hole are perpendicularly folded outwards along preset folding lines to form limiting plates, the limiting plates are used for limiting, supporting and fixing the supporting pieces on the outer sides, rectangular air holes are formed between the two adjacent limiting plates, and the height of each limiting plate is consistent with that of each hole or each air hole.

The rectangular air holes are consistent in length and height with the limiting plate, and the rectangular air holes are the same or different in width.

The whole limiting plate is in a triangular shape and/or a trapezoid shape, such as a right-angled triangle or a right-angled trapezoid shape.

The limiting plate folded out of each side plate is oppositely inserted and connected with a second connecting groove corresponding to the upper end of at least one connecting plate positioned at the lower part of the outer side of the side plate through the first connecting groove; each connecting plate is provided with at least two second connecting grooves; each connecting plate is connected with at least two limiting plates through the second connecting grooves.

The material near the two ends of the filter material can be covered on the upper end face of the side plate, or covered on the upper end face of the side plate, and then folded downwards outside the side plate to cover the upper part of the side plate.

Wherein a plurality of the supporting pieces are arranged in a line and can be connected in series into an integral supporting structure through the connection between the left adjacent side plate and the right adjacent side plate, continuous filtering materials matched with the size of the integral supporting structure are flatly laid on the side plates of the supporting pieces of the integral supporting structure and the inner side of the bottom plate to form a filtering structure combination body,

the front and back surfaces of the limiting plates are overlapped with each other and then are connected with the connecting plate in an inserting mode, and a shared connecting plate is achieved.

The material of the near two ends of the flat filter material matched with the size of the integral support structure can be covered on the upper end surface of the side plate outside the support piece outside the integral support structure, and then the outer side of the side plate outside the support piece outside the integral support structure is folded downwards to coat the upper part of the side plate, or the material is not coated and directly extends to the top end of the inner side of the side plate to be stopped.

The front and rear surfaces of the limiting plates are overlapped with each other and then are connected with the connecting plate in an inserting manner, so that the connecting plate can be shared.

The support member is made of a paperboard, such as a corrugated paperboard, and the flat-plate-shaped filter material is formed by laying a plurality of layers of paper with honeycomb holes to form a certain thickness.

The rear end of the flat filtering material formed by the plurality of layers of paper with honeycomb holes can be provided with a filtering sheet made of sheet fiber materials so as to enhance the filtering effect.

In a second aspect of the present invention, a filter module is provided, which includes a housing having an airflow inlet and an airflow outlet, and at least one filter structure disposed in the housing, where the filter structure is disposed on an airflow path between the airflow inlet and the airflow outlet, and is used for filtering an incoming airflow to be filtered and discharging the filtered airflow, the filter structure is used to separate paint mist from the airflow, the housing and the filter structure disposed in the housing are pressed together to seal the filter structure from an inner wall of the housing, so that the unfiltered airflow passes through the filter structure instead of passing through a gap between the housing and the filter structure, an opening between two side plates, which is wide at the top and narrow at the bottom, is disposed near the airflow inlet, and the bottom plate is disposed near the airflow outlet.

The air inlet of the outer shell is provided with a protruding piece for limiting the filter structure, and the protruding piece can be bent downwards to the inner part of the outer shell through a bending line and extends into an opening with a wide top and a narrow bottom of the filter structure so as to limit the position of the filter structure.

The housing may be made of cardboard, such as corrugated cardboard, and an opening for the filter structure to enter and exit the housing may be formed on one side of the non-airflow inlet and the airflow outlet of the housing, and the opening may be sealed and closed by a cover plate in a use state of the paint mist filtering.

The filtering structure can be used for separating the over-sprayed paint mist from the air flow mixed with the over-sprayed paint mist generated by spraying, and is convenient to manufacture and reasonable in cost.

Drawings

Fig. 1 shows an isometric view of a filter structure assembly having three filter structures according to an exemplary embodiment of the present disclosure;

FIG. 2 shows an isometric view of another angle of the embodiment of FIG. 1;

FIG. 3 shows a side view of the embodiment of FIG. 1;

fig. 4 shows an isometric view of a filter structure assembly expanded into a sheet form according to an exemplary embodiment of the invention, wherein the filter structure assembly has three filter structures and is free of attachment webs and laid filter material;

FIG. 5 illustrates an isometric view of a filter material according to an exemplary embodiment of the present invention;

fig. 6 shows an isometric view of a filter structure assembly unfolded into a sheet form, wherein the filter structure assembly has three filter structures and no attachment plates are mounted, according to an exemplary embodiment of the invention;

figure 7 shows a partially isometric view of the embodiment of figure 6 with the plate of restriction folded up;

fig. 8 shows an isometric view of the embodiment of fig. 6 with all the stopper plates folded;

FIG. 9 shows an isometric view of a filter structure assembly according to an exemplary embodiment of the present disclosure not fully folded into a three-dimensional state, wherein the filter structure assembly has three filter structures and is not attached to a connector panel;

FIG. 10 illustrates an isometric view of a filter structure assembly having three filter structures without a connector plate installed, according to an exemplary embodiment of the present invention;

FIG. 11 shows an isometric view of a web according to an exemplary embodiment of the present invention;

FIG. 12 illustrates a perspective view of a filter structure assembly mounting web having three filter structures in accordance with an exemplary embodiment of the present invention;

FIG. 13 shows a top view of a filtration module having a filtration arrangement combination of three filtration arrangements according to an exemplary embodiment of the present invention;

FIG. 14 shows an isometric view of a filtration module having a filtration arrangement combination of three filtration arrangements according to an exemplary embodiment of the present invention;

FIG. 15 shows a cross-sectional view of a filtration module having a filtration arrangement comprising three filtration arrangements according to an exemplary embodiment of the present invention;

fig. 16 shows an isometric view of a housing according to an exemplary embodiment of the present invention;

FIG. 17 illustrates an isometric view of a filtration module according to an exemplary embodiment of the present invention, wherein a filtration arrangement comprising three filtration arrangements is being loaded into a housing;

fig. 18 shows an isometric view of a filter module according to an exemplary embodiment of the invention having a filter structure combination with three filter structures and without tabs at the inlet of the housing bent into place.

Reference numerals

10 filtration structure

11 support piece

12U-shaped structure

121 side plate

122 first bend line

123 backplane

124 side

125 limiting plate

126 first connecting groove

127 second bending line

13 air hole

14 connecting plate

141 second connecting groove

15 Filter Material

20 filtration module

21 outer cover

211 inlet

212 tab

213 third bend line

214 outlet

22 Filter Structure Assembly

30 unfiltered gas flow

31 filtered gas stream

Detailed Description

The invention is described in further detail below with reference to the figures and specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Fig. 1 shows an isometric view of a filter structure arrangement (22) according to an exemplary embodiment of the invention, the filter structure arrangement (22) having three filter structures (10). Fig. 2 shows an isometric view of another angle of the embodiment of fig. 1. Fig. 3 shows a side view of the embodiment of fig. 1. Fig. 4 shows an isometric view of a filter structure combination (22) unfolded into a sheet form according to an exemplary embodiment of the invention, wherein the filter structure combination (22) has three filter structures (10) and no attachment webs (14) and no laid filter material (15) are installed.

Referring to fig. 1 to 4, a filter structure (10) for separating a paint mist from a paint mist-mixed air flow generated by spraying according to an embodiment of the present invention includes a support member (11) and a filter material (15) fixed to the support member (11). The supporting piece (11) body has certain rigidity and strength, and can ensure that the filtering material (15) and the supporting piece (11) cannot be seriously deformed to cause functional failure when being subjected to pressure generated by airflow passing. The rigidity strength is partly from the rigidity strength of the raw material for manufacturing the supporting part (11) and partly from the structural characteristics of the supporting part (11), and the specific structural optimization can provide the supporting part (11) with high structural strength.

The supporting piece (11) comprises a U-shaped structure (12), the U-shaped structure (12) is made of a sheet-shaped planar material, two non-intersecting bending lines (122) in the middle of the material are bent to form a structure which is connected by three sheet-shaped structures including a side plate (121), a bottom plate (123) and the side plate (121) and is similar to an opening with a wide upper part and a narrow lower part of a letter U, the two side plates (121) and the bottom plate (123) are in a quadrilateral sheet-shaped form, and two sides of the bottom plate, which are not adjacent to the quadrilateral sheet-shaped structure, are connected to one side of the quadrilateral sheet-shaped structure of one side plate respectively.

As an alternative embodiment, the material of the support (11) may be a cardboard material, such as corrugated cardboard. The corrugated board has light weight, certain rigidity, convenient processing and low cost, and can be incinerated together with adsorbed paint mist after being used.

Fig. 5 shows an isometric view of a filter material (15) according to an exemplary embodiment of the invention. Referring to fig. 5, the filter material (15) is laid in a sheet form and fixed on three sheet-like structures of the U-shaped structure (12) of the support member (11), and the large face of the sheet-like filter material (15) is attached to three large faces inside the three sheet-like structures of the U-shaped structure (12) of the support member (11). The filter material (15) is preferably a flexible sheet-like structure, which is easy to lay and fix on the support (11).

As an optional embodiment, the material of the sheet-shaped filter material can be paper with honeycomb holes, the requirement of filter precision of over-sprayed paint mist with different characteristics is met by laying multiple layers, and a sheet-shaped fiber filter can be added at the rear end of the paper with the honeycomb holes to ensure the filter effect.

Wherein the fixing of the sheet-shaped filter material (15) to the three sheet-shaped structures of the U-shaped structure (12) of the support (11) includes, but is not limited to, sewing, gluing, pressing, etc.

Fig. 6 shows an isometric view of a filter structure assembly (22) unfolded into a sheet form according to an exemplary embodiment of the invention, wherein the filter structure assembly (22) has three filter structures (10) and no attachment plates (14) are mounted. Referring to fig. 6, the two side plates (121) and the bottom plate (123) of the three sheet structures of the U-shaped structure (12) of the support member (11) are provided with the ventilation holes (13), and when the filter material (15) is laid on the three sheet structures of the U-shaped structure (12) of the support member (11), the airflow can simultaneously pass through the ventilation holes (13) of the filter material (15) and the sheet structures of the U-shaped structure (12) of the support member (11) without significant resistance.

The opening of the U-shaped structure (12) faces the inflow direction of the unfiltered airflow (30), the included angle between the two side plates (121) and the bottom plate (123) is larger than 90 degrees when the unfiltered airflow (30) flows into the direction, and the three sheet structures of the U-shaped structure (12) of the support piece (11) form a letter U similar to an opening or a letter V with a flat bottom to form an opening structure with a wide upper part and a narrow lower part. When the filter structure (10) is placed in a space with the width consistent with that of the filter structure (10), the air flow can pass through the filter materials (15) which are flatly laid on three planes of the U-shaped structure (12) of the support piece (11) at the same time, and compared with the case that the filter materials (15) are flatly laid in the direction which is completely perpendicular to the air flow, the filter area can be effectively enlarged.

The side (124) of any one or two side plates (121) of the U-shaped structure (12) of the support (11) of the filter structure (10), which is not adjacent to the side of the quadrangular sheet structure connected with the bottom plate (123), can be connected with the side (124) of the same position of another one or two filter structures (10), and through the connection in the form, a plurality of filter structures (10) can be connected in series to form a filter structure combination body (22). By forming a filter structure assembly (22) by connecting filter structures (10) in series and adjusting the size of the assembly, the area of the filter material can be significantly enlarged without changing the cross-sectional area of the air flow.

Fig. 7 shows a partially isometric view of the embodiment of fig. 6 with the stopper plate (125) folded up. Fig. 8 shows an isometric view of the embodiment of fig. 6 with all the stopper plates (125) folded.

Referring to fig. 7 and 8, as an alternative embodiment, the limiting plate (125) is folded from the middle part of the sheet structures of the two side plates (121) of the U-shaped structure (12) of the supporting member (11) according to a desired shape by cutting or punching and bending along a bending line (127), wherein the folding direction is the external direction of the U-shaped structure (12) of the supporting member (11), namely, the folding direction is positioned on the side of the filtered air flow (31).

The limiting plate (125) is used for limiting and fixing the two side plates (121) and the bottom plate (123) of the U-shaped structure (12) of the support piece (11), and limiting and fixing the filtering material (15) which is paved and fixed on the inner sides of the two side plates (121) and the bottom plate (123) through the limiting and fixing support piece (11), so that the rigidity strength of the filtering structure (10) is enhanced.

When the filter structure (10) is manufactured or assembled and placed in the shell (21) of the filter module (20), the limiting plate (125) on the U-shaped structure (12) of the supporting part (11) can keep the shape of the filter structure (10), and when the filter structure is subjected to wind pressure caused by airflow in the using process, the filter structure (10) is ensured not to be seriously deformed, so that the function is failed.

At least two limiting plates (125) are folded out from each side plate (121) of the U-shaped structure (12) of the support (11), and at least two limiting plates (125) are folded out, so that the structural shape and the rigidity strength of the filtering structure (10) can be maintained.

Wherein, can roll over more than two limiting plate (125) on each curb plate (121), the increase of limiting plate (125) quantity can continue to promote the rigidity intensity of filtration (10) in theory, but should optimize limiting plate (125) position and shape when limiting plate (125) quantity increases, otherwise too much limiting plate (125) not only can not bring higher rigidity intensity, have increased the complexity of filtration (10) preparation and assembly on the contrary.

On each curb plate (121) of U-shaped structure (12) from support piece (11), when designing the flaky raw and other materials processing scheme, can will open bleeder vent (13) and roll over out limiting plate (125) and design simultaneously, through optimizing the processing scheme, can obtain higher ventilation effect and stronger support effect relatively.

Fig. 11 shows an isometric view of a connection plate (14) according to an exemplary embodiment of the invention. Fig. 12 shows a perspective view of a filter structure assembly (22) mounting web (14) according to an exemplary embodiment of the invention, the filter structure assembly (22) having three filter structures (10).

Referring to fig. 11 and 12, as an alternative embodiment, at least one first connecting groove (126) is formed at the bottom end of each limiting plate (125), the first connecting groove (126) is a hollow part which is elongated from one side, open at one end and closed at the other end, and can be connected or fixed after being inserted into the second connecting groove (141) of the connecting plate (14) of the support (11). The U-shaped structure (12) of the supporting piece (11) is consistent with the positions of the first connecting grooves (126) formed in all the limiting plates (125) folded from the side plate (121).

Wherein, all the limiting plates (125) folded on the same side plate (121) of the U-shaped structure (12) of the supporting piece (11) are connected with at least one connecting plate (14). The connection mode is that the first connection groove (126) on the limit plate (125) and the second connection groove (141) on the connection plate (14) are inserted oppositely, and the connection plate (14) is ensured not to be separated from the limit plate (125) through clamping and friction force.

Wherein, it has two second spread groove (141) at least to open on each connecting plate (14), and each connecting plate (14) passes through second spread groove (141) and connects two limiting plates (125) at least. After each connecting plate (14) is connected with at least two limiting plates (125), a stable rectangular structure is formed, all the limiting plates (125) connected with the connecting plate can be ensured to be stably in a folded state, and when the filtering structure (10) bears wind pressure caused by airflow, the limiting plates (125) cannot be folded along the bending lines (127) to cause deformation and failure of the supporting structure (10).

In the embodiment of the invention, after two or more filtering structures (10) are connected in series to form the filtering structure combination body (22), the number of the limit plates (125) folded from the side plates (121) of the U-shaped structures (12) of the two supporting pieces (11) connected with every two adjacent filtering structures (10) is consistent, the limit plates (125) on every two adjacent side plates (121) are folded in place and are correspondingly and pairwise attached together, the first connecting grooves (126) formed in the limit plates (125) are also overlapped, so that the two groups of limit plates (125) folded from every two adjacent side plates (121) can share one or more connecting plates (14) and limit and fix the space between every two adjacent side plates (121), after the filtering structure combination body (22) is assembled in the shell (21) of the filtering module (20), no additional structure is required to restrain or support the side plates (121).

All the limiting plates (125) and the connecting plates (14) of the supporting pieces (11) of a single filtering structure (10) or a plurality of filtering structure combinations (22) are positioned on one side of the filtered airflow (31) and play a role in supporting and limiting the side plates (121) and the bottom plate (123) of the U-shaped structure (12) and laying fixed filtering materials (15) on the side plates (121) and the bottom plate (123).

Fig. 9 shows an isometric view of a filter structure combination (22) according to an exemplary embodiment of the invention, not completely folded into a three-dimensional state, wherein the filter structure combination (22) has three filter structures (10) and no connection plates (14) are mounted. Fig. 10 shows an isometric view of a filter structure assembly (22) according to an exemplary embodiment of the invention, wherein the filter structure assembly (22) has three filter structures (10) and no attachment plates (14) are mounted;

as shown in fig. 9 and 10, as a preferred embodiment, the filter structure assembly (22) may be manufactured by cutting and pressing a long sheet-shaped raw material, then laying and fixing a sheet-shaped filter material (15) on the surface, forming a plurality of U-shaped structures (12) of the support members (11) of the filter structure (10) and a flat sheet of the filter material (15), bending the filter structure assembly along a first bending line (122), a second bending line (127) and a connecting edge (124) to form a three-dimensional shape, and inserting a connecting plate (14) into the limiting plate (125) to form the filter structure assembly (22).

The sheet-shaped filter material (15) on the filter structure assembly (22) is of an integrally continuous flat structure, and can be directly laid through the continuous sheet-shaped material (15), so that the processing difficulty is reduced.

Wherein, a single filtering structure (10) or the filtering structure combination body (22) can be placed/installed in a shell (21) which can form a filtering module (20) by combining with the single filtering structure (10) or the filtering structure combination body (22), and through the structural combination of the filtering structure (10) and the shell (21), the unfiltered air flow (30) with the paint mist can be ensured to mostly pass through the filtering material (15), and the paint mist in the air flow is adsorbed/filtered/intercepted, thereby achieving the effect of reducing the paint mist content in the filtered air flow (31).

Fig. 13 shows a top view of a filter module (20) according to an exemplary embodiment of the invention, the filter module (20) having a filter structure arrangement (22) with three filter structures (10). Fig. 14 shows an isometric view of a filter module (20) according to an exemplary embodiment of the invention, the filter module (20) having a filter structure combination (22) comprising three filter structures (10). Fig. 15 shows a cross-sectional view of a filter module (20) according to an exemplary embodiment of the invention, the filter module (20) having a filter structure combination (22) with three filter structures (10).

Referring to fig. 13 to 15, a filter module (20) for separating a spray mist from a spray-generated unfiltered air flow (30) mixed with the spray mist comprises the single filter structure (10) or a filter structure assembly (22) consisting of a plurality of filter structures (10) connected together, and a housing (21) which can be used for placing/mounting the single filter structure (10) or the filter structure assembly (22).

Fig. 16 shows an isometric view of a shell (21) according to an exemplary embodiment of the present invention.

Referring to fig. 16, the filtration module (20) includes a housing (21), the housing (21) including a peripheral sidewall having an inlet (211) opening on a first side of the housing (21) and an outlet (214) opening on a second, opposite side of the housing. The inlet (211) opening and the outlet (214) opening provide substantially no resistance to gas flow along a flow path extending through the housing from the inlet (211) opening to the outlet (214) opening.

As an alternative, the preferred material for the housing (21) is corrugated cardboard. The corrugated board has light weight, certain rigidity, convenient processing and low cost, and can be incinerated together with adsorbed paint mist after being used.

After a single filtering structure (10) or a filtering structure combination (22) and the shell (21) are combined to form a filtering module (20), unfiltered airflow (30) with paint mist generated by spraying is guided to an inlet (211) of the filtering module shell (21) through an exhaust air duct, passes through the filtering module (20) and then is exhausted from an outlet (214) of the shell (21) of the filtering module (20), and a part of paint mist in the airflow is separated/adsorbed/filtered/intercepted by the filtering module.

After the filter structure (10) or the filter structure assembly (22) is placed in the housing (21) of the filter module (20), one or more U-shaped structures (12) of the filter structure (10) or the filter structure assembly (22) open into the inlet (211) of the housing (21) of the filter module (20), i.e. in the direction of the flow of the unfiltered air flow (30). The base plate (123) of the U-shaped structure (12) of the filter structure (10) is parallel and adjacent to the outlet (214) side of the housing (21) of the filter module (20).

As an alternative embodiment, a protruding piece (212) extending out is arranged on the opening of the inlet (211) of the shell (21) of the filter module (20), and the protruding piece (212) can be bent to the inner part of the shell (21) of the filter module (20) through a bending line (213). After the individual filter structures (10) or filter structure combinations (22) of the filter modules (20) have been placed in the housing (21) of the filter modules (20), the tabs (212) can be folded into the openings of the U-shaped structures (12) of the filter structures (10) by folding them along the third fold line (213) into the housing (21), limiting the position of the U-shaped structures (12) and ensuring that the U-shaped structures (12) of the filter structures (10) do not change significantly in position due to wind pressure and paint mist accumulation during use of the filter modules (20) for separating paint mist overspray from the unfiltered air stream (30).

Wherein the U-shaped structure (12) of each filter structure (10) corresponds to at least one tab (212), and increasing the number of tabs (212) on each U-shaped structure (12) increases the positional stability of the U-shaped structure (12). As the number of filter structures (10) within a filter module (20) increases, so does the number of tabs (212).

Fig. 17 shows an isometric view of a filter module (20) according to an exemplary embodiment of the invention, in which a filter structure combination (22) containing three filter structures (10) is being loaded into a housing (21). Fig. 18 shows an isometric view of a filter module (20) according to an exemplary embodiment of the invention, wherein the filter module (20) has a filter structure combination (22) with three filter structures (10) and the tab (212) at the inlet (211) of the housing (21) is not bent into place.

Referring to fig. 17 and 18, in the pre-assembled state, a face of the housing (21) of the filtration module (20) other than the inlet (211) and outlet (214) may be made open, and a single filtration structure (10) or a plurality of filtration structure assemblies (22) may be slid into the housing (21) of the filtration module (20) along the opening of the face and then the face closed. The shell (21) of the filtering module (20) and the single filtering structure (10) or the plurality of filtering structure assemblies (22) placed in the shell (21) are pressed together to play a role in sealing, so that most of unfiltered air flow (30) can pass through the filtering structure (10) instead of a gap between the shell (21) and the filtering structure (10), and only a small amount of paint mist is contained in the filtered air flow (31).

As an alternative, the material of the casing may be cardboard, preferably corrugated cardboard. The corrugated board has light weight, certain rigidity, convenient processing and low cost, and can be incinerated together with adsorbed paint mist after being used.

While there have been shown and described the fundamental principles and essential features of the invention and advantages thereof, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof;

the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The filtering structure comprises at least one supporting piece and a flat filtering material fixed on the supporting piece, wherein the supporting piece comprises a U-shaped structure and a connecting plate, the U-shaped structure is formed by two side plates which are oppositely arranged and a bottom plate which is connected with the two side plates, the bottom ends of the two side plates are obliquely connected with the two opposite ends of the bottom plate, and dihedral angles are obtuse angles, so that an opening which is wide at the top and narrow at the bottom and used for receiving airflow to be filtered is formed between the two side plates; the filter materials are arranged on the inner sides of the two side plates and the bottom plate in a tiled mode; at least two air holes are formed in each side plate, at least two edges of each air hole are respectively and perpendicularly folded to form a limiting plate, the limiting plates are used for limiting, supporting and fixing the supporting pieces on the outer sides, and the bottom end of each limiting plate is connected with the connecting plate on the lower portion of the outer side of each side plate in an inserting mode so as to keep the side plate in a perpendicular state.

2. The filter structure for separating paint mist overspray from an airstream according to claim 1, wherein said base plate is formed with at least one air vent.

3. The filter structure for separating paint mist passing through an airflow according to claim 1, wherein the overall shape of the limiting plate is triangular and/or trapezoidal.

4. The filter structure for separating paint mist passing through an airflow according to claim 1, wherein the bottom end of each of the restriction plates is provided with at least one first connection groove, and the restriction plate folded out of each of the side plates is inserted into and connected with a corresponding second connection groove at the upper end of at least one connection plate located at the lower part of the outer side of the side plate in an opposite direction through the first connection groove; each connecting plate is provided with at least two second connecting grooves; each connecting plate is connected with at least two limiting plates through the second connecting grooves.

5. A filter structure according to claim 1, wherein a plurality of said support members are arranged in a row and connected by left and right adjacent side panels to form a unitary support structure, and wherein a continuous filter material sized to fit the unitary support structure is laid flat on the inside of the side panels and bottom panels of the support members of the unitary support structure to form a filter structure assembly.

6. The filter structure for separating paint mist passing through in air flow according to claim 5, wherein the front and back surfaces of at least two of the limiting plates folded at corresponding positions on the left and right adjacent side plates of the filter assembly are overlapped with each other and then are connected with one of the connecting plates in an inserting manner, so that a common connecting plate is realized.

7. The filter structure for separating paint mist overspray from an air stream as claimed in claim 1 wherein said support member is formed of cardboard and said flat filter material is formed of a plurality of layers of paper having honeycomb-shaped holes laid to a certain thickness.

8. A filter construction for separating paint overspray from an airstream according to claim 7, characterized in that the rear end of a flat filter material formed of a plurality of layers of paper having honeycomb holes is provided with a filter sheet of fibrous material in the form of a sheet.

9. A filter module for separating paint overspray from an air stream, comprising a housing having an air stream inlet and an air stream outlet, and at least one filter structure disposed in the housing, the filtering structure is arranged on an airflow path between the airflow inlet and the airflow outlet and is used for filtering and discharging the entering airflow to be filtered, wherein the filtering structure adopts the filtering structure for separating the paint mist sprayed in the air flow according to any one of claims 1 to 8, the shell and the filtering structure arranged in the shell are pressed to seal the filtering structure and the inner wall of the shell, so that the unfiltered air flow passes over the filter structure rather than through the gap between the housing and the filter structure, the wide-top and narrow-bottom opening between the two side panels receiving the air flow to be filtered is arranged close to the air flow inlet, and the bottom panel is arranged close to the air flow outlet.

10. The filter module for separating paint overspray from air streams of claim 9 wherein said housing air stream inlet has a tab for retaining said filter structure, said tab being capable of being bent downwardly through a bend line into the interior of said housing and into a wide top and narrow bottom opening of said filter structure to limit the position of said filter structure.

11. A filter module for separating paint overspray from an airstream according to claim 10, wherein said housing is formed from cardboard, and an opening for said filter structure to enter and exit said housing is formed in one side, and is sealed by a cover plate in the use position.