A multi-cartridge air purification device

Abstract

The utility model discloses a kind of multi-filter element air purification devices, comprising: main body, the main body is equipped with cavity and with the fan being communicated with the cavity, the cavity is detachably installed at least two plate-shaped filter elements sequentially arranged towards the fan, the cavity or the plate-shaped filter element is movably provided with support piece, the support piece can be stretched from the inside wall of the cavity or can be abutted on the inside wall of the cavity to form the installation space of accommodating single plate-shaped filter element, the support piece is supported between the plate-shaped filter element and the main body to make the plate-shaped filter element and the fan have cooperation gap. The above structure of multi-filter element air purification device utilizes the cavity of main body to accommodate at least two plate-shaped filter elements to transport, saves the packaging structure of plate-shaped filter element and reduces transportation cost, also can avoid crushing plate-shaped filter element in the process of transportation.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to a multi-filter air purification device. Background Technology

[0002] With the rapid development of modern living standards, air purifiers have become an essential household appliance in many homes. Air purifiers can improve people's living environment and enhance their health. Among the components, the air purifier filter is an essential accessory. As a consumable, replacing a depleted filter incurs significant transportation costs, especially for overseas markets. If users purchase multiple filters with their air purifiers, the extra filters require separate packaging. This packaging not only takes up transportation space but also needs to meet certain strength requirements to prevent filter damage, thus increasing both packaging and transportation costs. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology, one of the objectives of this utility model is to provide a multi-filter air purification device that can save packaging and transportation costs.

[0004] A multi-filter air purification device according to an embodiment of the present invention includes: a main body, the main body having a cavity and a fan communicating with the cavity, the cavity having at least two plate-shaped filters arranged sequentially facing the fan, the cavity or the plate-shaped filters being movably provided with a support member, the support member being able to extend from or abut against the inner wall of the cavity to form an installation space for accommodating a single plate-shaped filter, the support member being supported between the plate-shaped filter and the main body to provide a fitting gap between the plate-shaped filter and the fan.

[0005] The multi-filter air purification device according to the embodiments of the present invention has at least the following beneficial effects:

[0006] The multi-filter air purifier with the above structure utilizes a main body cavity to accommodate at least two plate-shaped filters for transportation. This saves on packaging materials for the plate-shaped filters, reduces transportation costs, and prevents damage to the filters during transport. Upon initial use, the user should first remove all plate-shaped filters. Then, the support bracket should extend from or abut against the inner wall of the cavity to create an installation space that can only hold one plate-shaped filter. A clearance exists between the plate-shaped filter and the fan within this installation space to ensure adequate airflow and filtration efficiency.

[0007] In some embodiments of this utility model, the cavity has a side opening, the main body is detachably connected to a cover plate that closes the side opening of the cavity, the bottom wall of the cavity in the depth direction is opposite to the cover plate, the bottom wall of the cavity has an air inlet corresponding to the air intake end of the fan, and a single plate-shaped filter element can be sandwiched between the support member and the cover plate to form the fitting gap with the air inlet.

[0008] In some embodiments of this utility model, at least two oppositely arranged support members are detachably connected to the inner wall of the cavity. The support members have abutting planes facing the cover plate, and each abutting plane is coplanar. The abutting planes and the cover plate define the installation space.

[0009] In some embodiments of this utility model, the support member is an L-shaped support, the inner peripheral wall of the cavity is provided with a first slot for inserting one end of the L-shaped support, the bottom wall of the cavity is provided with a second slot for inserting the other end of the L-shaped support, and the surface of the L-shaped support facing away from the bottom wall of the cavity forms the abutting plane.

[0010] In some embodiments of this utility model, the support member includes a cylindrical rod and support plates and a rotating mounting part respectively disposed at both ends of the cylindrical rod, and the bottom wall of the cavity is provided with mounting holes that cooperate with the rotating mounting part.

[0011] In some embodiments of this utility model, at least two opposingly arranged support members are movably connected to the inner wall of the cavity. Each support member has an abutting plane facing the cover plate. The support member has an extended state extending out of the inner wall of the cavity and a retracted state retracted into the inner wall of the cavity. When the support member is in the retracted state, at least two plate-shaped filter elements are stacked inside the cavity. When the support member is in the extended state, the installation space is defined between all the support members and the cover plate.

[0012] In some embodiments of this utility model, the inner peripheral wall of the cavity is recessed to form a first receiving groove, and the support member includes a fixed plate fixed in the first receiving groove and a first movable plate pivotally connected to the fixed plate. The first movable plate can be rotated to be folded into the first receiving groove or rotated to be parallel to the bottom wall of the cavity.

[0013] In some embodiments of this utility model, the inner peripheral wall of the cavity is recessed to form a second receiving groove, and the support member includes a second movable plate and a third movable plate. One end of the second movable plate is rotatably connected to the second receiving groove, and one end of the third movable plate is rotatably connected to the other end of the second movable plate. Both the second movable plate and the third movable plate can be folded and stored in the second receiving groove. When both the second movable plate and the third movable plate are rotatably extended out of the second receiving groove, the third movable plate is supported on the bottom wall of the cavity so that the second movable plate abuts against the side wall of the plate-shaped filter element.

[0014] In some embodiments of this utility model, the inner peripheral wall of the cavity is formed with a notch, and the support member is rotatably connected to the main body via a pivot perpendicular to the bottom wall of the cavity. The support member can be rotated to protrude out of the notch or rotated to be completely contained within the notch.

[0015] In some embodiments of this utility model, the outline edge of the plate-shaped filter element is movably provided with a plurality of support members that are capable of telescoping and extending along its thickness direction. The support members extend along the thickness direction of the plate-shaped filter element to abut against the bottom wall of the cavity and confine the plate-shaped filter element in the installation space.

[0016] In some embodiments of this utility model, the cavity is a rectangular cavity, the plate-shaped filter element matches the perimeter of the rectangular cavity, and a support member is arranged at both ends of the two opposite outer sidewalls of the plate-shaped filter element. The outer sidewall of the plate-shaped filter element is provided with a sliding insert groove extending along the thickness direction of the plate-shaped filter element, and the end of the sliding insert groove is provided with a positioning recess. The support member is provided with a positioning protrusion that cooperates with the positioning recess to stabilize the extended position of the support member.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the plate-shaped filter, cover plate and main body when separated in Embodiment 1 of the multi-filter air purification device of this utility model;

[0020] Figure 2 This is a schematic diagram of Embodiment 2, in which a support structure is provided on the main body;

[0021] Figure 3 yes Figure 2An enlarged schematic diagram showing the layout where the support components are separated from the main body;

[0022] Figure 4 This is an enlarged schematic diagram of the layout of the support component in Embodiment 3, where it is separated from the main body;

[0023] Figure 5 yes Figure 1 A schematic diagram of the structure after removing the plate-shaped filter element and cover plate in the embodiment;

[0024] Figure 6 This is an enlarged schematic diagram of the layout of the support component when it is unfolded relative to the main body, according to Embodiment 4.

[0025] Figure 7 yes Figure 6 An enlarged schematic diagram of the layout of the support components relative to the main body in the embodiment;

[0026] Figure 8 This is an enlarged schematic diagram of the layout of the support component in Embodiment 5 when it is unfolded relative to the main body;

[0027] Figure 9 yes Figure 8 An enlarged schematic diagram of the layout of the support components relative to the main body in the embodiment;

[0028] Figure 10 This is a schematic diagram of an embodiment of a plate-shaped filter element with a support component configured on it.

[0029] Figure 11 yes Figure 10 A magnified view of part A.

[0030] Figure label:

[0031] Main body 100; cavity 110; first slot 111; second slot 112; elastic slot 113; elastic hook 114; mounting hole 115; first receiving groove 116; second receiving groove 117; notch groove 118; stop groove 1181; fan 200; plate filter element 300; sliding mounting groove 310; positioning recess 320; bracket 400; stop protrusion 401; abutment plane 410; cylindrical rod 420; support plate 430; rotating mounting part 440; anti-detachment protrusion 441; positioning ring 442; fixing plate 450; first movable plate 460; second movable plate 470; third movable plate 480; positioning protrusion 490; cover plate 500; torsion spring 600. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0033] In the description of this utility model, it should be understood that the directional descriptions, such as the terms "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] See Figure 1 and Figure 5 , or see Figure 2 and Figure 3 , or see Figure 10 and Figure 11This utility model discloses a multi-filter air purification device, comprising: a main body 100, wherein the main body 100 is provided with a cavity 110 and a fan 200 connected to the cavity 110; the cavity 110 is detachably mounted with at least two plate-shaped filter elements 300 arranged sequentially facing the fan 200; the cavity 110 or the plate-shaped filter element 300 is movably provided with a support member 400; the support member 400 can extend from the inner sidewall of the cavity 110 or abut against the inner sidewall of the cavity 110 to form an installation space for accommodating a single plate-shaped filter element 300; the support member 400 is supported between the plate-shaped filter element 300 and the main body 100 so that there is a fitting gap between the plate-shaped filter element 300 and the fan 200.

[0037] The multi-filter air purifier with the above structure utilizes the cavity 110 of the main body 100 to accommodate at least two plate-shaped filters 300 for transportation. This saves on packaging structure for the plate-shaped filters 300 and reduces transportation costs, while also preventing damage to the plate-shaped filters 300 during transportation. Upon initial use, the user first removes all the plate-shaped filters 300, then extends the support 400 out of or abuts against the inner wall of the cavity 110 to create an installation space that can only hold one plate-shaped filter 300. A clearance exists between the plate-shaped filter 300 and the fan 200 within the installation space to ensure sufficient gas flow and filtration efficiency. This reduces packaging and transportation costs while ensuring the normal operation of the air purifier. Understandably, when the air purifier is working, only one plate filter element 300 needs to be placed in the installation space within the cavity 110. The remaining plate filter elements 300 can be stored for later use. When one plate filter element 300 reaches the end of its service life, another plate filter element 300 can be replaced.

[0038] It should be noted that in traditional air purification devices, a fitting gap must be provided between the plate filter element 300 and the fan 200 to allow sufficient airflow through the plate filter element 300. This fitting gap also helps reduce wind noise. In the preferred embodiment of this application, two plate filter elements 300 are provided, stacked along the depth direction of the cavity 110. The thickness of the plate filter element 300 is adapted to the size of the fitting gap, that is, the fitting gap can accommodate the plate filter element 300 close to the fan 200. Since the fitting gap already exists in the prior art, it saves on packaging structure and transportation costs to accommodate two plate filter elements 300 without changing the thickness of the air purification device. This reduces the packaging and transportation costs of purchasing a new plate filter element 300, and lowers the subsequent operating costs of the air purification device.

[0039] Secondly, it should be noted that in the existing technology, if the plate filter element 300 is transported separately, a packaging structure with high mechanical strength is required, which increases the cost of the packaging structure.

[0040] See Figure 1 and Figure 5 In some embodiments of this utility model, the cavity 110 has a side opening, and the main body 100 is detachably connected to a cover plate 500 that closes the side opening of the cavity 110, thereby facilitating the replacement of the plate filter element 300. The bottom wall of the cavity 110 in the depth direction is opposite to the cover plate 500. The bottom wall of the cavity 110 has an air inlet corresponding to the suction end of the fan 200. When the fan 200 is working, external gas is drawn in through the plate filter element 300. The large area of ​​the bottom wall of the cavity 110 helps to design the air inlet to be larger in size. The larger space formed by the fitting gap is conducive to increasing the gas flow rate. A single plate filter element 300 can be sandwiched between the support member 400 and the cover plate 500 to form the fitting gap with the air inlet.

[0041] See Figure 2 and Figure 3 , or see Figure 4 In some embodiments of this utility model, at least two opposingly arranged support members 400 are detachably connected to the inner sidewall of the cavity 110. Each support member 400 has an abutment plane 410 facing the cover plate 500, and all abutment planes 410 are coplanar. The abutment planes 410 and the cover plate 500 define the installation space. The abutment planes 410 help increase the contact area between the support member 400 and the plate-shaped filter element 300, avoiding excessive compression in the thickness direction along parts of the plate-shaped filter element 300. It should be noted that the number and position of the support members 400 can be configured according to the shape and size of the support members 400, ensuring that the distance between the sidewall of the plate-shaped filter element 300 and the air inlet remains consistent (i.e., no tilting occurs).

[0042] Additionally, it should be noted that the bracket 400 is smaller in volume than the plate-shaped filter element 300. After the bracket 400 is removed, it can be placed in the gap between the main body 100 and the packaging box, on the surface of the main body 100, or in the default position inside, etc., without increasing the packaging volume.

[0043] See Figure 2 and Figure 3In some embodiments of this utility model, the support member 400 is an L-shaped support. The inner peripheral wall of the cavity 110 is provided with a first slot 111 for inserting one end of the L-shaped support, and the bottom wall of the cavity 110 is provided with a second slot 112 for inserting the other end of the L-shaped support. The surface of the L-shaped support facing away from the bottom wall of the cavity 110 forms the abutment plane 410. It can be understood that after the first slot 111 and the second slot 112 are inserted into the two ends of the L-shaped support respectively, a rectangular frame is formed between the L-shaped support, the bottom wall of the cavity 110, and the inner peripheral wall of the cavity 110, which can well support the plate-shaped filter element 300 and prevent the L-shaped support from collapsing.

[0044] See Figure 3 In some embodiments of this utility model, to ensure the stability of the L-shaped bracket after it is connected to the main body 100, the second slot 112 is a recessed groove with an outline shape consistent with the shape of the end of the L-shaped bracket. An elastic groove 113 is provided through the first slot 111, and the end of the L-shaped bracket is provided with an elastic hook 114 that cooperates with the elastic groove 113, thereby preventing the L-shaped bracket from shaking. It should be noted that the user only needs to install the L-shaped bracket upon initial use; therefore, the cooperation between the elastic hook 114 and the elastic groove 113 does not require disassembly.

[0045] See Figure 4 In some embodiments of this utility model, the support member 400 includes a cylindrical rod 420, a support plate 430 and a rotating mounting portion 440 respectively disposed at both ends of the cylindrical rod 420, and the bottom wall of the cavity 110 is provided with a mounting hole 115 that mates with the rotating mounting portion 440. The support member 400 with the above structure is fixed to the main body 100 by the mating of the rotating mounting portion 440 and the mounting hole 115. When the support plate 430 is subjected to pressure from the plate-shaped filter element 300, the cylindrical rod 420 will not move in the rod direction, so that the support plate 430 and the cover plate 500 together define the position of the plate-shaped filter element 300.

[0046] See Figure 4In some embodiments of this utility model, the rotating mounting part 440 includes at least two anti-detachment protrusions 441 protruding from the outer peripheral wall of the end of the cylindrical rod 420 and a positioning ring 442 protruding from the outer peripheral wall of the cylindrical rod 420. The positioning ring 442 is located between the support plate 430 and the anti-detachment protrusions 441. The mounting hole 115 includes a circular hole that matches the cylindrical rod 420 and a clearance groove formed on the outer periphery of the circular hole and corresponding one-to-one with the anti-detachment protrusions 441. The distance between the positioning ring 442 and the anti-detachment protrusions 441 matches the thickness of the bottom wall of the cavity 110. It should be noted that when installing the bracket 400 of this structure, first align the cylindrical rod 420 with the circular hole and the anti-detachment protrusion 441 with the clearance groove before inserting it. The positioning ring 442 abuts against the bottom wall of the cavity 110. Then, rotate the cylindrical rod 420 to misalign the anti-detachment protrusion 441 with the corresponding clearance groove. At this time, the anti-detachment protrusion 441 abuts against the outer surface of the bottom plate of the cavity 110. When removing the bracket 400, simply rotate the cylindrical rod 420 to align the anti-detachment protrusion 441 with the corresponding clearance groove and pull it out.

[0047] See Figure 5 , or see Figure 6 and Figure 7 , or see Figure 8 and Figure 9 In some embodiments of this utility model, at least two opposingly arranged support members 400 are movably connected to the inner wall of the cavity 110. Each support member 400 has an abutment plane 410 facing the cover plate 500. Each support member 400 has an extended state extending out of the inner wall of the cavity 110 and a retracted state stored in the inner wall of the cavity 110. When the support member 400 is in the retracted state, at least two plate-shaped filter elements 300 are stacked inside the cavity 110. When the support member 400 is in the extended state, the installation space is defined between all the support members 400 and the cover plate 500. It is understandable that when the bracket 400 is switched to the retracted state, the internal space of the cavity 110 can accommodate at least two plate-shaped filter elements 300, while when the bracket is switched to the unfolded state, the internal space of the cavity 110 can only accommodate one plate-shaped filter element 300, and the plate-shaped filter element 300 is a certain distance away from the fan 200 to form a fitting gap.

[0048] It should be noted that the bracket 400 being detachably connected to the inner wall of the cavity 110 and the bracket 400 being movably connected to the inner wall of the cavity 110 are two ways in which the bracket 400 is movably disposed in the cavity 110.

[0049] See Figure 5In some embodiments of this utility model, the inner peripheral wall of the cavity 110 is recessed to form a first receiving groove 116. The support member 400 includes a fixed plate 450 fixed in the first receiving groove 116 and a first movable plate 460 pivotally connected to the fixed plate 450. The first movable plate 460 can be rotated to be folded within the first receiving groove 116 or rotated to be parallel to the bottom wall of the cavity 110. It should be noted that rotating the first movable plate 460 to be folded within the first receiving groove 116 to avoid protruding from the inner peripheral wall of the cavity 110 can prevent scratching the outer peripheral contour of the plate-shaped filter element 300, thus forming a larger cavity 110 for accommodating the plate-shaped filter element 300. When the first movable plate 460 rotates to the bottom wall parallel to the cavity 110, it cannot continue to rotate. Specifically, a limiting structure that restricts the unfolding angle of the second movable plate 470 can be set between the second movable plate 470 and the fixed plate 450, or between the second movable plate 470 and the main body 100. The limiting structure will not be described in detail here.

[0050] See Figure 6 and Figure 7 In some embodiments of this utility model, the inner peripheral wall of the cavity 110 is recessed to form a second receiving groove 117. The support member 400 includes a second movable plate 470 and a third movable plate 480. One end of the second movable plate 470 is rotatably connected to the second receiving groove 117, and one end of the third movable plate 480 is rotatably connected to the other end of the second movable plate 470. Both the second movable plate 470 and the third movable plate 480 can be folded and stored in the second receiving groove 117. When both the second movable plate 470 and the third movable plate 480 are rotatably extended out of the second receiving groove 117, the third movable plate 480 is supported on the bottom wall of the cavity 110 so that the second movable plate 470 abuts against the side wall of the plate-shaped filter element 300. Specifically, the second movable plate 470 is parallel to the bottom wall of the cavity 110, and the third movable plate 480 is perpendicular to the second movable plate 470. The second movable plate 470, the third movable plate 480, the bottom wall of the cavity 110, and the inner peripheral wall of the cavity 110 form a rectangular frame, which can well support the plate-shaped filter element 300. When it is necessary to store the support member 400, the second movable plate 470 rotates into the second receiving groove 117, and the third movable plate 480 rotates to be stacked on one side of the second movable plate 470, also located within the second receiving groove 117.

[0051] See Figure 8 and Figure 9In some embodiments of this utility model, the inner peripheral wall of the cavity 110 is formed with a notch 118, and the support member 400 is rotatably connected to the main body 100 via a pivot perpendicular to the bottom wall of the cavity 110. The support member 400 can rotate to protrude beyond the notch 118 or rotate to be completely contained within the notch 118. The method of rotating outwards or inwards within the notch 118 is more convenient for the user. Because the pivot is perpendicular to the bottom wall of the cavity 110, the support member 400 will not rotate around the pivot and be contained within the notch 118 when subjected to pressure from the plate-shaped filter element 300.

[0052] See Figure 8 In some embodiments of this utility model, a stop groove 1181 is provided on one side edge of the notch 118, and a torsion spring 600 is provided on the pivot to drive the support member 400 to rotate and remain protruding outside the notch 118. A stop protrusion 401 is provided on one side of the support member 400 to cooperate with the stop groove 1181. The support member 400 and the inner peripheral wall of the cavity 110 are connected by tape or a snap-fit ​​structure to drive the stop protrusion 401 to engage with the stop groove 1181. It can be understood that during transportation, when the support member 400 is housed in the notch 118 by tape or snap-fit ​​structure, and the stop protrusion 401 engages with the stop groove 1181, the support member 400 does not protrude from the inner peripheral wall of the cavity 110. When the tape is torn off or the snap-fit ​​structure is unlocked, the support member 400 rotates under the action of the torsion spring 600 to extend out of the notch 118.

[0053] See Figure 2 or Figure 5 In some embodiments of this utility model, the cavity 110 is a rectangular cavity, the plate-shaped filter element 300 matches the perimeter of the rectangular cavity, and four support members 400 are arranged at the four corners of the rectangular cavity to support the four corners of the plate-shaped filter element 300. This can effectively support the plate-shaped filter element 300 and prevent the plate-shaped filter element 300 from tilting. Moreover, the size of the support member 400 can be designed to be smaller, saving costs.

[0054] See Figure 10 and Figure 11In some embodiments of this utility model, the outline edge of the plate-shaped filter element 300 is movably provided with multiple support members 400 that can extend and retract along its thickness direction. The support members 400 extend along the thickness direction of the plate-shaped filter element 300 to abut against the bottom wall of the cavity 110, thereby confining the plate-shaped filter element 300 within the installation space. It is understood that when using it for the first time, the user should remove all the plate-shaped filter elements 300 and use only one of them. First, extend and fix the support member 400 along the thickness direction of the plate-shaped filter element 300. Then, abut the support member 400 against the bottom wall of the cavity 110, and finally install the cover plate 500. All the support members 400 support the plate-shaped filter element 300, creating a fitting gap between the plate-shaped filter element 300 and the bottom wall of the cavity 110 at a certain distance, without requiring any modification to the interior of the cavity 110 of the main body 100.

[0055] See Figure 11 In some embodiments of this utility model, the cavity 110 is a rectangular cavity, and the plate-shaped filter element 300 matches the perimeter of the rectangular cavity. A support member 400 is arranged at both ends of the two opposite outer sidewalls of the plate-shaped filter element 300, thus forming four support members 400 arranged at the four corners of the plate-shaped filter element 300. The outer sidewall of the plate-shaped filter element 300 is provided with a sliding insert groove 310 extending along the thickness direction of the plate-shaped filter element 300. The end of the sliding insert groove 310 is provided with a positioning recess 320. The support member 400 is provided with a positioning protrusion 490 that cooperates with the positioning recess 320. When the support member 400 slides along the sliding insert groove 310 until the positioning protrusion 490 and the positioning recess 320 are combined, the support member 400 is not easily retracted under pressure.

[0056] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A multi-filter air purification device, characterized in that, include: The main body (100) has a cavity (110) and a fan (200) connected to the cavity (110). The cavity (110) is detachably equipped with at least two plate-shaped filter elements (300) arranged sequentially facing the fan (200). The cavity (110) or the plate-shaped filter element (300) is movably provided with a support member (400). The support member (400) can extend from the inner wall of the cavity (110) or abut against the inner wall of the cavity (110) to form an installation space for accommodating a single plate-shaped filter element (300). The support member (400) is supported between the plate-shaped filter element (300) and the main body (100) so that there is a fitting gap between the plate-shaped filter element (300) and the fan (200).

2. The multi-filter air purification device according to claim 1, characterized in that: The cavity (110) has a side opening, and the main body (100) is detachably connected to a cover plate (500) that closes the side opening of the cavity (110). The bottom wall of the cavity (110) in the depth direction is opposite to the cover plate (500). The bottom wall of the cavity (110) has an air inlet corresponding to the air intake end of the fan (200). A single plate-shaped filter element (300) can be sandwiched between the support member (400) and the cover plate (500) to form the fitting gap with the air inlet.

3. The multi-filter air purification device according to claim 2, characterized in that: At least two opposing brackets (400) are detachably connected to the inner wall of the cavity (110), the brackets (400) having abutting planes (410) facing the cover plate (500), each of the abutting planes (410) being coplanar, and defining the installation space between the abutting planes (410) and the cover plate (500).

4. The multi-filter air purification device according to claim 3, characterized in that: The support member (400) is an L-shaped support. The inner peripheral wall of the cavity (110) is provided with a first slot (111) for inserting one end of the L-shaped support. The bottom wall of the cavity (110) is provided with a second slot (112) for inserting the other end of the L-shaped support. The surface of the L-shaped support facing away from the bottom wall of the cavity (110) forms the abutment plane (410).

5. The multi-filter air purification device according to claim 3, characterized in that: The bracket (400) includes a cylindrical rod (420) and support plates (430) and a rotating mounting part (440) respectively provided at both ends of the cylindrical rod (420). The bottom wall of the cavity (110) is provided with a mounting hole (115) that cooperates with the rotating mounting part (440).

6. The multi-filter air purification device according to claim 2, characterized in that: At least two opposing support members (400) are movably connected to the inner wall of the cavity (110). Each support member (400) has an abutment plane (410) facing the cover plate (500). Each support member (400) has an extended state extending out of the inner wall of the cavity (110) and a retracted state retracted into the inner wall of the cavity (110). When the support member (400) is in the retracted state, at least two plate-shaped filter elements (300) are stacked inside the cavity (110). When the support member (400) is in the extended state, the installation space is defined between all the support members (400) and the cover plate (500).

7. The multi-filter air purification device according to claim 6, characterized in that: The inner peripheral wall of the cavity (110) is recessed to form a first receiving groove (116). The support member (400) includes a fixed plate (450) fixed in the first receiving groove (116) and a first movable plate (460) pivotally connected to the fixed plate (450). The first movable plate (460) can be rotated to be folded into the first receiving groove (116) or rotated to be parallel to the bottom wall of the cavity (110).

8. The multi-filter air purification device according to claim 6, characterized in that: The inner peripheral wall of the cavity (110) is recessed to form a second receiving groove (117). The support member (400) includes a second movable plate (470) and a third movable plate (480). One end of the second movable plate (470) is rotatably connected to the second receiving groove (117), and one end of the third movable plate (480) is rotatably connected to the other end of the second movable plate (470). Both the second movable plate (470) and the third movable plate (480) can be folded and stored inside the second receiving groove (117). When both the second movable plate (470) and the third movable plate (480) are rotatably extended out of the second receiving groove (117), the third movable plate (480) is supported on the bottom wall of the cavity (110) so that the second movable plate (470) abuts against the side wall of the plate-shaped filter element (300).

9. A multi-filter air purification device according to claim 6, characterized in that: The inner peripheral wall of the cavity (110) is formed with a notch (118), and the support member (400) is rotatably connected to the main body (100) via a pivot perpendicular to the bottom wall of the cavity (110). The support member (400) can be rotated to protrude out of the notch (118) or rotated to be completely contained within the notch (118).

10. A multi-filter air purification device according to claim 1, characterized in that: The plate-shaped filter element (300) has multiple support members (400) that are movably displaced along its thickness direction at its contour edge. The support members (400) extend along the thickness direction of the plate-shaped filter element (300) to abut against the bottom wall of the cavity (110) and confine the plate-shaped filter element (300) in the installation space.

11. A multi-filter air purification device according to claim 10, characterized in that: The cavity (110) is a rectangular cavity, and the plate-shaped filter element (300) matches the perimeter of the rectangular cavity. Each end of the two opposite outer sidewalls of the plate-shaped filter element (300) is provided with a support member (400). The outer sidewall of the plate-shaped filter element (300) is provided with a sliding insert groove (310) extending along the thickness direction of the plate-shaped filter element (300). The end of the sliding insert groove (310) is provided with a positioning recess (320). The support member (400) is provided with a positioning protrusion (490) that cooperates with the positioning recess (320) to stabilize the extended position of the support member (400).

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