Air filtering structure with telescopic filter element

Abstract

The utility model belongs to the technical field of air filtering devices, and particularly relates to an air filtering structure with a telescopic filter element, which comprises a frame body and the filter element, the filter element is used for filtering air; the frame body is fixedly connected with the edge of the filter element; a plurality of first folds are arranged on the filter element, when the first folds are folded, the length of the filter element can be shortened, and when the first folds are stretched, the length of the filter element can be lengthened, so that the length of the filter element can be adjusted as required, the filter element can be conveniently connected with frame bodies with different sizes in a matched manner, and the volume of the filter element can be compressed by folding the filter element, so that the filter element is convenient to transport or store; the filter element is provided with the connecting strip on the top surface and / or the bottom surface of the first fold, and the connecting strip is used for limiting the stretching length of the first fold, so that the filter element is not easy to exceed the bearing limit of the filter element in the stretching process, the damage is reduced, and the service life of the filter element is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of air filtering devices, and particularly relates to an air filtering structure with a retractable filter element. Background Art

[0002] An air filter is a device that isolates or absorbs tiny particles in the air to improve air cleanliness. In an air filter, a filter element is usually used for filtering; existing air filter elements are mostly fixed with a paper frame. When in use, the airflow passes through the filter element in the frame to achieve filtering. The existing filter frame is usually set in an integrated frame shape. When the size of the filter element and the frame is inconsistent, such as when the size of the filter element is larger than the frame size, the frame needs to be modified or remade, which makes the operation cumbersome and inconvenient to use.

[0003] In response to the above problems, there is a filter device with a retractable filter element, such as the gas filter element disclosed in Chinese utility model patent CN206778093U, which is composed of filter paper to form a cavity, and there is no filter paper at the bottom of the gas filter element, and the gas filter element can be retracted. The utility model patent uses the retractable structure of the gas filter element to adjust the size of the gas filter element as needed. However, the above utility model patent is limited to use in scenarios with large installation space, and is not suitable for equipment with high requirements for filter element volume, such as vertical air conditioners and car air conditioners.

[0004] Therefore, it is urgent to invent and create an air filtering structure which is convenient for connecting the filter element and the frame and occupies a small space. Utility Model Content

[0005] The utility model aims to provide an air filter structure with a retractable filter element, aiming to solve the technical problem in the prior art that "the air filter element is not easy to adjust the size, and it is difficult to adjust when the size of the filter element and the frame are not matched, making the connection between the two inconvenient".

[0006] To achieve the above-mentioned purpose, an embodiment of the utility model provides an air filtering structure with a retractable filter element, comprising a frame and a filter element; the filter element is used to filter air, and the frame is used to be fixedly connected to the edge of the filter element; a plurality of first pleats are provided on the filter element, and the plurality of first pleats can shorten the length of the filter element when folded and extend the length of the filter element when extended; the filter element is provided with connecting strips on the top surface and / or bottom surface of the first pleats, and the connecting strips are used to limit the extended length of the first pleats.

[0007] Optionally, the connecting strip is arranged along a length direction perpendicular to the first folds.

[0008] Optionally, the first fold includes a bending section and an extension section connected to each other; the bending section is arranged on the outside of the extension section; and the connecting strip is fixedly connected to the plurality of bending sections.

[0009] Optionally, the connecting strip is provided with a second fold between two adjacent bending sections; the second fold is used to be folded together with the first fold.

[0010] Optionally, the length of the second pleats when stretched is smaller than the length of the first pleats when stretched.

[0011] Optionally, the connecting strip is made of soft cloth.

[0012] Optionally, the frame body includes a plurality of strip-shaped frames; the plurality of frames are connected to each other to form a rectangular frame, and two adjacent frames are detachably connected.

[0013] Optionally, the frame is composed of a plurality of first strip frames and a plurality of second strip frames of the same number; the first strip frames and the second strip frames are connected to each other in an interlaced manner; the left and right ends of the first strip frames are provided with male Velcro tapes, and the left and right ends of the second strip frames are provided with female Velcro tapes, and the male Velcro tapes and the female Velcro tapes are detachably bonded.

[0014] Optionally, the frame is composed of two first strip frames and two second strip frames; the two second strip frames are arranged parallel to the expansion and contraction direction of the filter element; and the filter element and the second strip frames are detachably connected.

[0015] Optionally, an edge of the frame is provided with an edge binding structure; an inner side edge of the edge binding structure is concavely provided with a strip groove; and the edge binding structure can be folded along the strip groove.

[0016] Compared with the prior art, the above one or more technical solutions in the air filter structure with a retractable filter element provided in the embodiment of the utility model have at least one of the following technical effects:

[0017] The filter element is provided with a plurality of first pleats which can be folded or stretched; when the first pleats are folded, the length of the filter element is shortened; when the first pleats are stretched, the length of the filter element is stretched, so that the length of the filter element can be adjusted as needed, so as to facilitate the adaptation and connection with frames of different sizes; the filter element is provided with connecting strips on the top surface and / or the bottom surface of the first pleats, and the connecting strips limit the stretching length of the first pleats so that the filter element can be stretched in a limited manner, and it is not easy to exceed its own bearing limit during the stretching process, so as to reduce damage and extend the service life of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1It is the front view of the utility model.

[0020] Figure 2 A schematic diagram of the structure of the frame.

[0021] Figure 3 A cutaway view of the filter element.

[0022] Figure 4 for Figure 3 A partial enlarged view of circle A in the middle.

[0023] Figure 5 Schematic diagram of the structure of the second fold.

[0024] Figure 6 This is a schematic diagram of the expansion of the first bar box.

[0025] Figure 7 It is a schematic diagram of the structure of the first bar frame.

[0026] Figure 8 This is a schematic diagram of the expansion of the second bar box.

[0027] Fig. 9 It is a schematic diagram of the structure of the second bar frame.

[0028] Among them, the reference numerals in the figure are:

[0029] Frame 1, filter element 2, connecting strip 3,

[0030] Frame 11, edging structure 111, strip groove 112, first strip frame 12, Velcro male tape 121, second strip frame 13, Velcro female tape 131, side groove 132,

[0031] first fold 21, bending section 211, extension section 212,

[0032] Second fold 31 . DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0034] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0036] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0037] In one embodiment of the present invention, an air filter structure with a retractable filter element is provided, referring to Figure 1-Figure 4 , including a frame 1 and a filter element 2; the filter element 2 is used to filter air; the filter element 2 is preferably a filter paper commonly used in the prior art, such as HEPA filter paper that meets international standards, and can also be set to other materials that can be used to filter air; the frame 1 is used to be fixedly connected to the edge of the filter element 2 to fix the shape of the filter element 2, and the frame 1 can be connected to external components to facilitate the installation of the filter element 2 in air treatment equipment such as air conditioners and air purifiers; when in use, the air passes through the filter element 2 along direction a for filtration.

[0038] Furthermore, the filter element 2 is provided with a plurality of first pleats 21, which can be folded or stretched; when the first pleats 21 are folded, the length of the filter element 2 can be shortened, and when the first pleats 21 are stretched, the length of the filter element 2 can be extended, so that the length of the filter element 2 can be adjusted as needed.

[0039] Furthermore, the filter element 2 is provided with a connecting strip 3 on the top surface and / or bottom surface of the first pleat 21, that is, the connecting strip 3 can be provided only on the top surface of the first pleat 21, only on the bottom surface of the first pleat 21, or simultaneously on the top surface and the bottom surface of the first pleat 21. The above three settings can connect the connecting strip 3 to the first pleat 21; the connecting strip 3 is used to limit the extension length of the first pleat 21.

[0040] Compared with the prior art, the above one or more technical solutions in the retractable air filter structure of the filter element 2 provided in the embodiment of the utility model have at least one of the following technical effects:

[0041] The filter element 2 is provided with a plurality of first pleats 21 which can be folded or stretched; when the first pleats 21 are folded, the length of the filter element 2 is shortened; when the first pleats 21 are stretched, the length of the filter element 2 is stretched, so that the length of the filter element 2 can be adjusted as needed, so as to facilitate the adaptive connection with the frame 1 of different sizes; the filter element 2 is provided with a connecting strip 3 on the top surface and / or the bottom surface of the first pleats 21, and the connecting strip 3 limits the stretching length of the first pleats 21, so that the filter element 2 can be stretched in a limited manner, and it is not easy to exceed its own bearing limit during the stretching process, so as to reduce damage and extend the service life of the filter element 2.

[0042] refer to Figure 1 The connecting strip 3 is arranged along a length direction perpendicular to the first pleats 21 so that the connecting strip 3 can limit the extension length of the first pleats 21; during assembly, the connecting strip 3 is connected to several first pleats 21 in sequence, with a simple structure and convenient assembly.

[0043] refer to Figure 4 The first pleat 21 includes a bending section 211 and an extension section 212 which are connected to each other; the bending section 211 is provided with a bending angle, and the bending angle ranges from 0° to 180°, so that the first pleat 21 can be folded or stretched; the top surface and the bottom surface of the filter element 2 are defined as the outer side (the same below), the bending section 211 is arranged on the outer side of the extension section 212, and the extension sections 212 of two adjacent first pleats 21 are connected to each other, so that the two adjacent bending sections 211 are staggered on the top surface and the bottom surface of the filter element 2; the connecting strip 3 is fixedly connected to a plurality of bending sections 211.

[0044] In one embodiment of the present invention, the connecting strip 3 is fixedly connected to the outer side surface of the bending section 211 to facilitate assembly.

[0045] In another embodiment of the present invention, the connecting strip 3 may be fixedly connected to the extending section 212 .

[0046] Furthermore, the connection methods between the connecting strip 3 and the bending section 211 include bonding and sewing; bonding can be achieved by using glue with good adhesive properties, such as hot melt glue; sewing can be achieved by sewing with glue thread; the connection method between the connecting strip 3 and the bending section 211 can adopt one or two of the above-mentioned methods, or other methods that can fix the two together.

[0047] refer to Figure 5 A plurality of second pleats 31 are provided on the connecting strip 3, and the second pleats 31 can be folded or stretched; the bending direction of the second pleats 31 when folded can be toward the inside or toward the outside; when in use, the second pleats 31 are folded or stretched together with the first pleats 21, so that the length of the filter element 2 can be adjusted within the normal telescopic range.

[0048] Furthermore, the length of the second pleats 31 in a flat state is smaller than the length of the first pleats 21 in a flat state, so that the first pleats 21 have an extension margin relative to the second pleats 31, so that the connecting strip 3 can limit the extension length of the first pleats 21, and the filter element 2 is not easily damaged due to excessive extension.

[0049] Furthermore, the connecting strip 3 is made of soft fabric, such as non-woven fabric, cotton fabric, nylon fabric, etc. commonly used in the art, so that it is easy to stretch and retract, and can reduce the cost and production cost.

[0050] refer to Figure 1 , at least two connecting strips 3 are provided; when two connecting strips 3 are provided, the two connecting strips 3 are respectively provided at both ends of the filter element 2 to balance the force of the connecting strip 3 on the filter element 2.

[0051] refer to Figure 2 The frame 1 includes a plurality of strip frames 11 ; the plurality of frames 11 are connected to each other to form a rectangular frame, and two adjacent frames 11 are detachably connected to facilitate assembly and disassembly of the frame 1 .

[0052] refer to Figure 6-Figure 9 The frame 11 is composed of a plurality of first strip frames 12 and a plurality of second strip frames 13 of the same number; the first strip frame 12 and the second strip frame 13 are connected to each other in an interlaced manner, that is, the left and right ends of the first strip frame 12 are connected to the second strip frame 13, and the left and right ends of the second strip frame 13 are connected to the first strip frame 12; the left and right ends of the first strip frame 12 are provided with a male Velcro tape 121, and the left and right ends of the second strip frame 13 are provided with a female Velcro tape 131, and the male Velcro tape 121 and the female Velcro tape 131 are detachably bonded to make the first strip frame 12 and the second strip frame 13 detachably connected, which is simple to operate and easy to use; the male Velcro tape 121 and the female Velcro tape 131 are also called "Magic Tape", which is a commonly used bonding structure in the prior art.

[0053] In another embodiment of the present invention, reference Figure 1 The frame 11 is composed of two first strip frames 12 and two second strip frames 13; the two second strip frames 13 are perpendicular to the length direction of the filter element 2; the second strip frame 13 is provided with a side groove 132 adapted to be connected to the side of the filter element 2; the two first strip frames 12 are parallel to the length direction of the first pleats 21; during assembly, the filter element 2 is connected to the two first strip frames 12, the length of the filter element 2 is adjusted to make its size adapted to the length of the second strip frames 13, and then the second strip frame 13 is connected to the first strip frame 12, so that the side of the filter element 2 is placed in the side groove 132 to fix the filter element 2. This assembly method can make the filter element 2 adapt to second strip frames 13 of different sizes, and is flexible to use; when transportation or storage is required, the second strip frame 13 is disassembled and separated from the first strip frame 12, and the length of the filter element 2 is shortened to reduce the volume of the filter element 2 for easy transportation and storage.

[0054] Furthermore, the filter element 2 and the first strip frame 12 are bonded together by hot melt adhesive or other adhesive with good adhesion, so as to facilitate the assembly between the two.

[0055] refer to Figure 6-Figure 9 The edge of the frame 11 is provided with a edging structure 111, which facilitates the connection between several frames 11; the inner side of the edging structure 111 is recessed with a strip groove 112, which can be set as a milling cutter groove for easy processing and production; the edging structure 111 can be bent along the strip groove 112 so that the angle between the edging structure 111 and the inside of the frame 11 is less than 180°; when the angle is equal to 90°, the adjacent frames 11 are connected to each other to form a right angle shape.

[0056] Furthermore, the frame 11 is made of paper material, and the paper frame 11 is a filter element 2 packaging frame commonly used in the prior art, so that it is easy to process and is applicable to a variety of different air treatment equipment.

[0057] The rest of this embodiment is the same as the first embodiment. The features not explained in this embodiment are all based on the explanations in the first embodiment and will not be described in detail here.

[0058] The above content is a further detailed description of the utility model in combination with specific preferred implementation methods, and it cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, its architecture can be flexible and can derive a series of products. Just making a few simple deductions or substitutions should be regarded as belonging to the patent protection scope of the utility model determined by the submitted claims.

Claims

1. An air filter structure with a retractable filter element, comprising a frame (1) and a filter element (2); the filter element (2) is used to filter air, and the frame (1) is used to be fixedly connected to the edge of the filter element (2); characterized in that: The filter element (2) is provided with a plurality of first pleats (21), and when the plurality of first pleats (21) are folded, the length of the filter element (2) can be shortened, and when the plurality of first pleats (21) are stretched, the length of the filter element (2) can be stretched; the filter element (2) is provided with connecting strips (3) on the top surface and / or the bottom surface of the first pleats (21), and the connecting strips (3) are used to limit the stretched length of the first pleats (21).

2. The air filter structure with a retractable filter element according to claim 1, characterized in that: The connecting strip (3) is arranged along a length direction perpendicular to the first fold (21).

3. The air filtering structure with a retractable filter element according to claim 1 or 2, characterized in that: The first fold (21) comprises mutually connected bending sections (211) and extension sections (212); the connecting strip (3) is fixedly connected to a plurality of the bending sections (211).

4. The air filtering structure with a retractable filter element according to claim 3, characterized in that: The connection method between the connecting strip (3) and the bending section (211) includes bonding and sewing.

5. The air filtering structure with a retractable filter element according to claim 1 or 2, characterized in that: The connecting strip (3) is provided with a plurality of second folds (31); the second folds (31) are used to be folded or stretched together with the first folds (21).

6. The air filtering structure with a retractable filter element according to claim 5, characterized in that: The length of the second fold (31) in a flat state is smaller than the length of the first fold (21) in a flat state.

7. The air filtering structure with a retractable filter element according to claim 1 or 2, characterized in that: The frame (1) comprises a plurality of mutually connected frame frames (11); two adjacent frame frames (11) are detachably connected.

8. The air filtering structure with a retractable filter element according to claim 7, characterized in that: The frame (11) is composed of a plurality of first strip frames (12) and a plurality of second strip frames (13) of the same number; the first strip frames (12) and the second strip frames (13) are connected to each other in an interlaced manner; the first strip frames (12) are provided with a male Velcro tape (121), and the second strip frames (13) are provided with a female Velcro tape (131); the male Velcro tape (121) and the female Velcro tape (131) are detachably bonded.

9. The air filtering structure with a retractable filter element according to claim 7, characterized in that: The frame (11) is composed of two first strip frames (12) and two second strip frames (13); the two second strip frames (13) are perpendicular to the length direction of the filter element (2); and the second strip frames (13) are provided with side grooves (132) adapted to be connected to the side edges of the filter element (2).

10. The air filtering structure with a retractable filter element according to claim 7, characterized in that: The edge of the frame (11) is provided with an edge binding structure (111); the inner side edge of the edge binding structure (111) is concavely provided with a strip-shaped groove (112); and the edge binding structure (111) can be bent along the strip-shaped groove (112).

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