Air purifier that draws in ambient air through a filter panel

Abstract

TITLE: Air purifier drawing ambient air through a filter panel. Air purifier (AP) comprising a stand (51) formed from a blank (100) cut, folded, and assembled to form an enclosing housing (11); a filter panel (3) formed from a blank cut and folded, consisting of a body forming cells covered on both sides by a permeable sheet and receiving the filtering agent in the cells, this filter panel (3) being removably embedded in the enclosing housing (11); and a suction box on the back (111) of the stand (1), in fluidic connection with the enclosing housing (11) and equipped with a suction element; this suction box (3) is formed from a blank cut (100B), folded, and provided with means for connecting to the back (111) of the stand (1). Figure 1A

Description

Title of the invention: Air purifier drawing ambient air through a filter panel FIELD OF INVENTION

[0001] The present invention relates to an air purifier that draws in ambient air through a filter panel. STATE OF THE ART

[0002] There are different types of air purifiers, both industrial and domestic. In the case of domestic air purifiers, the main drawbacks are their reduced efficiency and operating noise due to their relatively small air intake surface area, designed to limit their size. This requires a high air velocity, which generates noise, to achieve any effectiveness. Furthermore, these air purifiers are generally difficult to recycle.

[0003] PURPOSE OF THE INVENTION

[0004] The present invention aims to develop an efficient, quiet-operating air purifier that can be easily recycled and that allows the filter to be replaced easily and without the need for tools.

[0005] DESCRIPTION AND ADVANTAGES OF THE INVENTION

[0006] To this end, the invention relates to an air purifier comprising a filter and a system for drawing ambient air through the filter,

[0007] purifier characterized in that it comprises

[0008] A. an easel formed from a blank that is cut, folded and assembled to form an enveloping housing, leaving a free space relative to the bottom of the housing,

[0009] B. a filter panel formed from a cut and folded blank comprising a body forming cells covered on both sides by a permeable sheet and receiving the filtering agent in the cells,

[0010] this filter panel being removably embedded in the surrounding housing,

[0011] C. a suction box on the back of the trestle, in fluidic connection with the surrounding housing by suction openings and equipped with a suction element.

[0012] This purifier according to the invention has the advantage of a large filtering surface area with good, stable distribution of the filtering agent. This purifier is easy to distribute because its assembled volume is very small. However, upon unfolding, a rigid and stable structure is obtained, as will be described below.

[0013] The purifier is easy to assemble from the cut blanks by simply folding and fitting them together. The blanks are preferably made of cardboard or a cardboard-like material, preferably easily recyclable. The filter element with its electric motor It is easily installed in the filter box by simply attaching it to the box.

[0014] The filter panel is easily recharged after the permeable layer is removed; it can also be easily replaced. The filter panel is installed by simply fitting it into the surrounding housing of the bracket, which ensures the assembly is watertight. This is further enhanced by the fact that the pressure drop required for the flow to pass through the filter wall is reduced, thus preventing bypass paths around the panel or the formation of preferential flow paths. This low pressure drop allows for a very evenly distributed flow across the panel surface, preventing the creation of preferential flow paths that could be generated by the inevitably uneven pressure losses as the flow passes through the cells.

[0015] The free volume behind the filter panel between the back of the stand equipped with the suction ports or passages to the suction box, distributes the depression evenly over the entire rear face of the filter panel.

[0016] The easel is, as indicated, preferably made from a cardboard blank, which facilitates and promotes its possible recycling.

[0017] According to another advantageous feature, the suction box is formed from a blank cut out, folded and provided with means of connection with the back of the easel.

[0018] According to another advantageous feature, the easel is formed by folding a part of the blank, producing: a back bordered by two side flaps and an easel base formed with a part of the blank connected to the back by a fold line and subdivided by fold lines, parallel to the fold line and forming by rolling a base, prismatic lying down, having a band forming a bottom connected to the back by the fold line, a front connected to the bottom by a fold line, a top connected to the front by a fold line, a return connected to the top by a fold line, the return descending to the bottom and a base connected to the return by a fold line, the base applying itself against the part of the bottom connected to the back and blocking the prismatic base against the back at the junction of the latter with the bottom.

[0019] This folded structure is very rigid and stable in its shape.

[0020] According to another advantageous feature, the front extends into the top by means of tabs not crossed by its folding line with the top and the return has tabs extending into the top and not crossed by the folding line connecting the return with the top so that after folding, the tabs border the top along its two folding lines.

[0021] According to another advantageous feature, complementing the above features, the return and the base are dimensioned in width between their fold lines so that the return is parallel to the front, the front is parallel to the direction of the edge of the flap and the top is perpendicular to the direction of the edge.

[0022] Also advantageously, each flap has a notch in its extension of the return and parallel to the direction of the edge, this notch opening into the edge and the return on each side, has a notch cutting the base limiting its dimension to the alignment of the back folding line, this notch allowing the return to hook by folding into the notch of each flap.

[0023] Finally, the notch of the flap forms with the edge of the flap a tab having the cross-section of the prismatic part of the base which envelops it, which stiffens the prismatic shape of the base since there is such a tab on each side and externally the prismatic part of the base is blocked at both ends by the respective flap.

[0024] According to another feature, the suction box is formed by folding a portion of blank to create a rectangular panel bordered by two opposite sides, each equipped with attachment tabs in the plane of its respective side, and another side of the panel equipped with an extension. The sides are connected to the panel by fold lines to fold the sides perpendicularly to the plane of the panel, and the back has slots at the locations intended for the side tabs and the side extension to receive these tabs and this extension. These features complete the rigidification.

[0025] According to another advantageous feature, the hooking legs have a head connected to the side by a collar, of reduced section, and locks in the form of locking plates with slots homologous to the legs provided to engage on the legs protruding from the front of the back and to take hold under the heads in the collars to retain the legs and lock the suction box against the outside face of the back.

[0026] These mechanical links facilitate the removable attachment of the suction box and lock it firmly against the back of the easel.

[0027] According to another advantageous feature, the panel has a cutout corresponding to the section of the suction element to receive and fix this element to the panel.

[0028] This assembly facilitates holding the suction element and simplifies assembly.

[0029] According to another advantageous feature, the filter panel consists of a body formed by stacking several grid-shaped panels with cut-out windows forming cells in the body to receive the filtering agent, the faces of the body being covered by an air-permeable sheet that closes the cells. Brief description of the drawings

[0030] The present invention will be described in more detail below with reference to embodiments of an air purifier shown in the accompanying drawings, in which:

[0031] [Fig.1A] Front perspective view of an air purifier stand,

[0032] [Fig. IB] rear perspective view of the easel of [Fig. 1 A],

[0033] [Fig.2] Side view of the easel fitted with the filter panel

[0034] [Fig.3] Plan view of the blank cut for the making of the easel and the box aspiring,

[0035] [Fig.4A] Side view of the easel without the suction box,

[0036] [Fig.4B] Sectional view of the easel without the suction box, the easel being equipped with the filter panel,

[0037] [Fig.4C] Sectional view of the folded blank forming the bracket,

[0038] [Fig.5] Plan view of the panel for the construction of the core of the filter panel,

[0039] [Fig.6] Front view of the filter panel fitted with the permeable coating,

[0040] [Fig.7] Perspective view of the easel fitted with the body of the uncoated filter panel,

[0041] [Fig.8] Plan view of the blank and the cut-out parts inside the outline of the blank,

[0042] [Fig.9] Perspective view of another embodiment of the easel without the filter panel,

[0043] [Fig. 10] Front view of the easel of [Fig.7] with the filter panel installed.

[0044] In the following description, the orientation terms are those of the elements of the puri Air purifier in its installed state. The representation of the purifier and its components is distorted by the perspective of some figures.

[0045] DESCRIPTION OF EMBODIMENT METHODS

[0046] According to figures 1A,B, 2, the invention relates to an air purifier PA which draws in ambient air through a filter panel 3 carried by a trestle 1 equipped with a suction box 2 to expel the filtered air.

[0047] The trestle 1 is formed from a blank cut, folded and assembled by mechanical links to form at the front an enveloping housing 11 receiving a filter panel 3 and carrying at the rear a suction box 2 equipped with a suction element, with an electric motor, to suck in ambient air through the passages in the back of the trestle 1 and expel the filtered air through openings in the suction box 2, downstream of its suction element.

[0048] The easel 1 is formed from a single piece cut and grooved from a blank 100 of a material such as cardboard. The blank 100, according to [Fig. 3], comprises in a single piece:

[0049] - a 100A support part,

[0050] - a part of base 100B,

[0051] - a part of a 100C suction box,

[0052] - a 100D lock part.

[0053] The support part 100A is a rectangular panel forming the back 111 bordered by two flaps 112 connected to the back 111 by folding lines LFI 12.

[0054] The back 111 is provided with a central opening 1111 surrounded by staggered rings of slots 1112. The back 111 is also provided with two pairs of vertical slots 1113 and a transverse slot 1114 extend beyond the rings of slots. The vertical slots 1113 and the transverse slot 1114 are distributed on a square or rectangular outline corresponding to the contour of the suction box 2 fixed to the reverse of the back 111.

[0055] The flaps 112 bordering the back 111 are hinged at right angles to the back. They are provided with notches 1121 to receive, by a form-locking mechanism, additional elements of the base 12 once deployed and folded.

[0056] * The base 12 is formed by a part 100B of the side bordering the lower side of the back 111 by an LFI folding line and comprising:

[0057] * a base 121 connected by a folding line LF2 to

[0058] * a front 122 connected by a folding line LF3 to

[0059] * a top 123, itself connected by a folding line LF4 to

[0060] * a return 124 provided with lateral notches 1242 for connecting to the right angle at a notch 1121 of flaps 112 and connected by the folding line LF5 to

[0061] * base 125 of pedestal 12.

[0062] The LF1-LF5 folding lines are parallel to the LFI folding line.

[0063] The blank 100 of [Fig.3] shows that the width (direction of the LFI fold line) is greater than the width of the back 111. According to this plan view, when the flaps 112 are folded square (n / 2) around their fold line LFI 12, the lower side comes against the bottom 121 on a line which is the extension of the fold line LFI 12 (line perpendicular to the fold line LFI).

[0064] The width of the panel 100B beyond the extension of the folding line LFI 12 continues to the base 125 whose sides remain in this alignment, necessary to allow the folding movement of the base 125 and in part that of the return 124 between the two folded flaps 112, as will appear in the following description.

[0065] The plan view also shows tabs cut into the top 122, namely:

[0066] - two tabs 1221 extending the front 122 into the band forming the top 123 and not crossed by the LF3 folding line,

[0067] - two tabs 1241 extending the return 124 into the top 123 and not traversed by the LF4 folding line. The latter are here straddling the undrawn but clearly deducible extension of the LFI 12 folding lines.

[0068] The tabs 1241 are cut by the fold line, that is to say they stop on it by an edge located on the extension and therefore perpendicular to the fold line LF4.

[0069] During the "winding" of the strips 122, 123 to create the prismatic part of the base 12, the front 122 straightens and so do its tabs 1221, while the return 124 descends from the fold line LF4 which corresponds to the The second edge of the top 123 is shaped so that the tabs 1241 stand upright in relief on the top 123, and the truncated edges of the tabs 1241 rest against the inside of each flap 112, thus stiffening the assembly. The tabs 1241 also complete the sealing of the filter corners.

[0070] Fig. 3 also shows the right-angled triangular shape of the flaps 112, the edge of which 112a corresponds to the hypotenuse of this triangle; this edge determines the shape of the enclosing housing 11 receiving the filter panel 3. This plan view allows us to see the inclined orientation of the housing 11 from the notch 1121 which cross-receives the notch 1242 of the return 124.

[0071] The dimensions in the longitudinal direction of the median axis of parts 100A, 100B of the blank 100 are defined as will be seen later with reference to figures 4A, 4B, 4C.

[0072] The notch 1121 is parallel to the edge 112a and its extension passes substantially through the point of intersection of the fold line LFI 12 and the upper edge 11 of the back 111. The notch 1121 forms a tab 1122 whose upper side 1121a, which is one of the entry edges to the notch 1121, is perpendicular to the direction of the edge 112a; thus, the top 123 of the base 12 comes onto this side and constitutes the lower support of the filter panel 3, which will thus be tightly embedded in the surrounding housing 11.

[0073] Figures 4A, 4B, and 4C show, in side or section view, the construction of the base 12 by folding part 100B of the blank 100. This side view shows the blank 100 of the easel, the back 11 of which has been raised at a right angle (H / 2) relative to the still-flat portion of the base 100B. The flaps 112 are folded at a right angle relative to the back 111 along the fold lines LFI 12 (here in the plane of the figure).

[0074] The inclined edge 112a of the flaps 112, which is the hypotenuse of the right triangle formed by the flaps, defines the inclination of the filter panel 3 in combination with the base 12, the folding of which will be described using figures 4B and 4C.

[0075] The notch 1121, substantially parallel to the edge 112a of the flap 112, has an entrance delimited by a rounded cutout 1121b to facilitate guiding the folding. The notch 1121 delimits the tab 1122 in the side 112, the top of which 1121a is preferably perpendicular to the line of the edge 112a. This tab 1122 delimits the base 12 on each side by stiffening the section of the base 12 obtained by folding the strips 122, 123, 124 of the base part 100B. The section of the base 12 appears in [Fig. 4C] with the fold lines LF1-LF5; This section is also, as already indicated, obtained by folding around the two legs 1122. The filter panel 3 is sketched in place in the wraparound housing 11 resting on the upper edge 111a of the back 111 and on the inclined top 123 of the base 12 being held by the tabs 1221, 1241.Behind the filter panel 3, there remains a prismatic volume with a triangular cross-section, brought into negative pressure by the suction box 3 not shown in the figures. 4A, 4B. The section of [Fig.4C] shows the inclination of the front 122 corresponding to the inclination of the edge 112a of the flaps 112; the orientation of the top 123 is perpendicular to this direction and the return 124 is also parallel to the direction of the edge 112a.

[0076] The specific shape of the base 12 (with a right-angled trapezoidal cross-section) is determined by the dimensions of the facets 122, 123, 124 of the base, the shape of the curvature of the leg 1122, the engagement of the return 124 by its notch 1242 ([Fig. 3]) in the notch 1121, and the locking of the base 125 against the back 111 near the fold line LFI. These complex mechanical connections stabilize the base 12 and the entire easel 1.

[0077] The folded and fixed FA blank by the attachment of the mechanical linking elements appears in perspective in [Fig.1A] which shows the enveloping housing 11 bordered between the flaps 112 by the top 123 of the base 12 delimited at the front and rear by cut-out tabs 1221, 1241 forming front and rear retaining elements defining a strip receiving the lower side of the filter panel 3.

[0078] The flaps 112 border laterally the housing 111 and the volume of the cavity, behind the filter panel supported at the top against the edge 11 of the back is a volume of triangular section delimited by the back 111 of the trestle and the filter panel 3; it is put into depression by the suction box 2 so that the depression is well distributed over the entire rear surface of the filter panel 3.

[0079] According to figures 1 B, 2, 3 the suction box 3 is formed by the part 100C of the blank 100 cut and fixed by two locks 24 made with the two parts 100D of the blank 100.

[0080] The cut-out part 100C is a rectangular panel 21 bordered by two sides 22 and a top 23 with lateral fold lines L10 for the sides 22 and a top fold line LU for the top 23.

[0081] The rectangular panel 21 has a cutout 211 receiving the relief of the suction element 25 having along the edge of the cutout, three fixing holes 212 for the suction element 25. The sides 22 connected by the fold lines L10 to the rectangular panel 21 are each provided with two hanging tabs 221 having a head connected by a collar 222 to the side 22.

[0082] The sides 22 and the top 23 are folded at right angles so that the raised band forming a retaining extension 231 of the top 23 can fit into the horizontal slot 1114 of the back 11 by simple engagement by shape and into the two pairs of vertical slots 1113 of the back 111. The heads 221 of the sides 22 protrude from the front of the back 111 ([Fig. 1A]). The latches 24, each formed by the folded portions 100D of the blank along a median line, have two coincident longitudinal slots 242, each covering a pair of tabs 221; the latches 24 engage by their slots 242 in the necks 222 of the mounting tabs 221, thus mechanically blocking the tabs and thus the suction box 2.

[0083] Before attaching the suction box 2 to the back 111 of the enclosing housing 11, it is fitted with the suction element 25, which is an electric motor-driven suction fan (not detailed). [Fig. 2] shows the suction box 2 installed.

[0084] According to Figures 5, 6, and 7, the filter panel 3 is formed by a body 31 composed of several layers 311 of thick cardboard; these layers are cut from the blank 100E as shown in [Fig. 5]. Each layer 311 is formed of a rectangular grid-shaped panel with a network of cut-out windows 312 covering the entire surface by folding or cutting lines FL30. These lines can also form the hinges for folding the layers 311 onto one another to form the stack. In this case, the lines or some of the lines L30 have a thickness to compensate for the thickness of the layers for folding.

[0085] In both cases, the layers 311 identical in their contour and their window 312 are superimposed to create cells 313 by the superposition of the windows 312.

[0086] To fill these cells with the pollution-absorbing material, one face of the stack, for example, the four layers, is first covered with an air-permeable sheet 314. The cells 313 thus formed are filled with active material in granular or granule form, and the second face of the panel 3 is also covered with an air-permeable sheet, which may optionally have a decorative facing in the form of fabric or other material. The filter panel 3 is thus ready to be installed in the surrounding housing 11 of the stand 1.

[0087] [Fig.6] shows the panel 3 revealing the body 31 with the alveoli 313 covered by a sheet 314 permeable to air.

[0088] Figure 7 shows the body 31 of panel 3 composed of several unloaded and uncovered layers 311. The body 31 is placed on the easel 1.

[0089] Fig. 8 shows the blank 100 with its different parts fitting within a blank contour whose dimensions are referenced L1 and L2.

[0090] This presentation of the blank shows the very efficient use of practically the entire surface of the blank for the making of the easel.

[0091] Fig. 9 is a perspective view of a variant embodiment of the easel 1 in which the base 12 has legs positioned differently from those of the first embodiment.

[0092] Fig. 9 also shows the suction panel 3 fitted with an envelope.

[0093] Fig. 10 is a front view of the PA air purifier according to the variant of Fig. 9, the filter panel 3 being installed on the base 12 and in the surrounding housing 11 of the stand 1.

[0094] NOMENCLATURE OF MAIN ELEMENTS

[0095] PA Air Purifier

[0096] 1 Easel

[0097] 11 Enveloping housing

[0098] 111 Back of the housing

[0099] 111a Upper edge of the back

[0100] 1111 Central suction opening

[0101] 1112 Slotted crown

[0102] 1113 Hanging slot

[0103] 1114 Retaining slot

[0104] 112th panel

[0105] 112a Edge

[0106] 1121 Notch

[0107] 1122 Paw

[0108] 1122a Upper side of the leg

[0109] 1121b Notch entry

[0110] 12 Easel base / prismatic base [YES] 121 Background

[0112] 122 In front

[0113] 1221 Front tab

[0114] 123 Above

[0115] 124 Return

[0116] 1241 Rear tab

[0117] 1242 Notch

[0118] 125 Base

[0119] 2 Suction box

[0120] 21 Central panel

[0121] 211 Cutting of the suction element

[0122] 212 Fixing hole

[0123] 22 Side

[0124] 221 Attachment tab

[0125] 222 Col

[0126] 224 Events

[0127] 23 Above

[0128] 231 Extension of detention

[0129] 24 Lock

[0130] 241 Plate

[0131] 242 Slot

[0132] 25 Suction element

[0133] 3 Filter panel

[0134] 31 Panel body

[0135] 311 Layers composing the body

[0136] 312 Window cut out of a layer

[0137] 313 Cells (superposition of several windows)

[0138] 314 Air-permeable membrane

[0139] LFI Bottom Fold Line 121

[0140] LF2 Front fold line 122

[0141] LF3 Top fold line 123

[0142] LF4 Return folding line 124

[0143] LF5 Base folding line 125

[0144] LF 10 Side fold line 22

[0145] LFI 1 Top fold line 23

[0146] LFI 12 Flap folding line 112

[0147] LF30 Layer folding / cutting line

[0148] 100 Easel Flan

[0149] 100A Supporting part

[0150] 100B Base part

[0151] 100C Part of the suction housing

[0152] 100D Locking Part

Claims

Demands

1. An air purifier comprising a filter and a system for drawing ambient air through the filter, characterized in that it comprises A. an easel (51) formed from a blank (100) cut, folded and assembled, forming: * a back (111) bordered by two lateral flaps (112) and, * an easel base (12) formed with a portion of the blank (100B) forming an enclosing housing (11), leaving a free space with respect to the bottom (111) of the housing (11), B. a filter panel (3) formed from a blank cut and folded, consisting of a body (31) forming cells (313) covered on both sides by a permeable sheet (314) and receiving the filtering agent in the cells (313), this filter panel (3) being removably embedded in the enclosing housing (11), C. a suction box (2) on the back (111) of the trestle (1), in fluidic connection with the enveloping housing (11) by suction openings (1111) and equipped with a suction element (25).

2. Air purifier according to claim 1, characterized in that the suction box (3) is formed from a cut blank (100B), folded and provided with means for connection with the back (111) of the trestle (1).

3. Air purifier according to claim 1, characterized in that the stand (1) is formed by folding a blank portion (100A) to create: * the back (111) and the base (12) with a blank portion (100B) connected to the back (111) by a fold line (LFI) and subdivided by fold lines (LF2-LF5), parallel to the fold line (LFI) and forming by rolling a base (12), a recumbent prismatic base, having a band forming a bottom (121) connected to the back (111) by the fold line (LFI), a front (122) connected to the bottom (121) by a fold line (LF2), a top (123) connected to the front (122) by a fold line (LF3), a return (124) connected to the top (123) by a fold line (LF4), the return (123) descending to the bottom (121) and a base (125) connected to the return (124) by a folding line (LF5), the base (125) applying against the part of the bottom (121) connected to the back (111) and blocking the prismatic base (12) against the back (111) at the junction of the latter with the bottom (121).

4. Air purifier according to claim 3, characterized in that the front (122) extends into the top (123) by means of tabs (1221) not crossed by its fold line (LF3) with the top (123) and the return (124) has tabs (1241) extending into the top (123) and not crossed by the fold line (LF4) connecting the return (124) with the top (123) so that after folding, the tabs (1221, 1241) border the top (123) along its two fold lines (LF3, LF4).

5. Air purifier according to claims 3 and 4, characterized in that the return (124) and the base (125) are dimensioned in width between their fold lines (LF4, LF5, LFI) so that the return (124) is parallel to the front (122), that the front (122) is parallel to the direction of the edge (112a) of the flap (112) and that the top (123) is perpendicular to the direction of the edge (112a).

6. Air purifier according to claims 3 to 5, characterized in that each flap (112) has a notch (122) in the extension of the return (124) and parallel to the direction of the edge (112a), this notch opening into the edge (112a) and the return (123) on each side has a notch (1242) cutting the base (125) limiting its dimension to the alignment of the fold line (LFI 12) of the back (111), this notch (1242) allowing the return (123) to hook by folding into the notch (1121) of each flap (112).

7. Air purifier according to claims 3 to 6, characterized in that the notch (1121) of the flap (112) forms with the edge (112a) of the flap, a tab (1122) having the cross-section of the prismatic part of the base (12) which envelops it.

8. Air purifier according to claims 1 to 3, characterized in that the suction box (3) is formed by folding a portion of blank (100C) to create a rectangular panel (21) bordered by two opposite sides (22), each provided with attachment tabs (221) in the plane of the side (22) respective and on the other side (23) of the panel having an extension (231), the sides (22, 23) being connected to the panel (21) by fold lines (LF10, LFI 1) to fold the sides (22, 23) perpendicular to the plane of the panel (21) and the back (111) has slots (1113, 1114) at the location intended for the tabs of the sides (22) and the extension (231) of the side (23) to receive these tabs and this extension.

9. Air purifier according to claim 8, characterized in that the hooking tabs (221) have a head connected to the side (22) by a collar (222) of reduced section and locks in the form of locking plates (241) with slots (242) homologous to the tabs (221) provided to engage on the tabs protruding from the front of the back (111) and to take hold under the heads in the collars (222) to retain the tabs and lock the suction box (3) against the outer face of the back (111).

10. Air purifier according to claims 8 and 9, characterized in that the panel (21) has a cutout (211) corresponding to the section of the suction element (25) to receive and fix this element (25) to the panel (21) and vents (224).

11. Air purifier according to claim 1, characterized in that the filter panel (3) consists of a body (31) formed by stacking several panels (311) in the form of a grid with cut-out windows (313) constituting cells in the body (31) to receive the filtering agent, the faces of the body (31) being covered by an air-permeable sheet and closing the cells.

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