A purification device that is convenient for maintenance

Abstract

The object of the present invention is to provide a purification device that is convenient for maintenance, which relates to the technical field of laboratory equipment and includes a first cavity and a second cavity arranged vertically; an air purification assembly is arranged in the first cavity, and the air purification assembly sequentially includes at least one primary filter, at least one fan and a high-efficiency filter from top to bottom; the first cavity includes a top plate, a bottom frame and a door body; the second cavity includes a top frame body and a first side frame and a second side frame arranged on both sides of the top frame body; a first L-shaped bracket is arranged on the first horizontal support frame, and a second L-shaped bracket is arranged on the second horizontal support frame; a first screw rod and a first U-shaped frame are arranged at the end of the first horizontal support body; a second screw rod and a second U-shaped frame are arranged at the end of the second horizontal support body; Technical effect: When the high-efficiency filter needs to be replaced, open the door body, simultaneously loosen the first screw rod and the second screw rod, and the high-efficiency filter is released and withdrawn from the door body, which is convenient for disassembly and maintenance.

Description

Technical Field

[0001] The present invention relates to the technical field of laboratory equipment, and particularly to a purification device that is easy to maintain. Background Art

[0002] A laminar flow workstation is a purification device that is widely used in working environments that require local dust-free and sterile conditions, and is suitable for scientific research and production departments such as medicine and health, biopharmaceuticals, food enterprises, medical experiments, research and production of optoelectronics, sterile laboratories, sterile microbial inspections, and plant tissue culture inoculations that require a locally clean and sterile working environment.

[0003] Currently, when replacing the high-efficiency filter of a laminar flow workstation, it is necessary to disassemble the top cover of the workstation and also remove the fan before the high-efficiency filter can be replaced, resulting in time-consuming and laborious later maintenance of the workstation and high maintenance costs. In addition, there are multiple welding points on the frame of the laminar flow workstation. Welding not only has a high cost, but also has the defects of being unsightly and low manufacturing efficiency, and cannot achieve modular rapid assembly.

[0004] Therefore, there is an urgent need to develop a purification device that is easy to maintain to overcome the above defects. Summary of the Invention

[0005] The purpose of the present invention is to provide a purification device that is easy to maintain.

[0006] To achieve the above object of the invention, the present invention provides the following technical solution: A purification device that is easy to maintain, comprising a first cavity and a second cavity arranged up and down;

[0007] An air purification assembly is arranged in the first cavity, and the air purification assembly successively includes at least one primary filter, at least one fan, and a high-efficiency filter from top to bottom;

[0008] The first cavity includes a top plate, a bottom frame, and a door body;

[0009] The second cavity includes a top frame and a first side frame and a second side frame arranged on both sides of the top frame. The first side frame extends upward and is connected to the top plate, the second side frame extends upward and is connected to the top plate, and the first end of the door body is hinged to the second side frame;

[0010] The bottom frame is fastened to the inner side of the top frame by a plurality of screws, and the frame of the high-efficiency filter is supported by the bottom frame;

[0011] The top frame includes a first horizontal support frame and a second horizontal support frame arranged in parallel;

[0012] A first L-shaped bracket is provided on the first horizontal support frame, and a second L-shaped bracket is provided on the second horizontal support frame. The first L-shaped bracket and the second L-shaped bracket are symmetrically arranged. The first L-shaped bracket includes a first vertical support body and a first horizontal support body, and the second L-shaped bracket includes a second vertical support body and a second horizontal support body;

[0013] A first support plate and a second support plate are arranged in parallel at the top of the cover of the fan;

[0014] A first screw and a first U-shaped frame are arranged at the end of the first horizontal support body. The first U-shaped frame is fastened to the first support plate. The first screw passes through the top plate, the first horizontal support body and the first U-shaped frame in sequence. Threads matching the first screw are provided at the end of the first horizontal support body, and a first double nut locks the end of the first screw to the first U-shaped frame;

[0015] A second screw and a second U-shaped frame are arranged at the end of the second horizontal support body. The second U-shaped frame is fastened to the second support plate. The second screw passes through the top plate, the second horizontal support body and the second U-shaped frame in sequence. Threads matching the second screw are provided at the end of the second horizontal support body, and a second double nut locks the end of the second screw to the second U-shaped frame;

[0016] Tighten the first screw and the second screw synchronously, and the cover of the fan presses the high-efficiency filter onto the bottom frame, and a sealing fit is formed between the frame of the high-efficiency filter and the bottom frame;

[0017] Loosen the first screw and the second screw synchronously, the pressure of the cover of the fan pressing on the high-efficiency filter is released, and the high-efficiency filter is drawn out from the opened door body.

[0018] Preferably, a first hollowed-out portion and a second hollowed-out portion are provided on the top plate;

[0019] A first rectangular frame body and a first pressing plate are installed in the first hollowed-out portion. A first groove is provided on one side of the first rectangular frame body. First screw holes and first protrusions are respectively provided on both sides of the first pressing plate. A first primary filter is placed between the first pressing plate and the first rectangular frame body. The first protrusion is inserted into the first groove, and the first pressing plate is locked to the top plate by matching the screw with the first screw hole. The first pressing plate is provided with a plurality of air inlet holes;

[0020] Install a second rectangular frame body and a second pressing plate in the second hollow-out part. A second groove is provided on one side of the second rectangular frame body. Second screw holes and second protrusions are respectively provided on both sides of the second pressing plate. Place a second primary filter between the second pressing plate and the second rectangular frame body. The second protrusion is inserted into the second groove. Cooperate with the screw and the second screw hole and lock the second pressing plate to the top plate. The second pressing plate is provided with a plurality of air inlets.

[0021] Preferably, the first screw rod is arranged on the side of the first hollow-out part, and the second screw rod is arranged on the side of the second hollow-out part.

[0022] Preferably, a first observation window is provided on the first side frame, and a second observation window is provided on the second side frame;

[0023] The first observation window includes a first glass. A first L-shaped sealing frame is arranged on the inner side around the periphery of the first observation window. Soft rubber strips are attached to the edges around the first glass, and the soft rubber strips cooperate with the first L-shaped sealing frame;

[0024] The second observation window includes a second glass. A second L-shaped sealing frame is arranged on the inner side around the periphery of the second observation window. Soft rubber strips are attached to the edges around the second glass, and the soft rubber strips cooperate with the second L-shaped sealing frame.

[0025] Preferably, the second end of the door body is locked to the first side frame by screws.

[0026] Preferably, the second cavity is provided with a glass door, and both sides of the glass door move up and down along the first side frame and the second side frame.

[0027] Preferably, the first horizontal support body is composed of a first U-shaped support member and a second U-shaped support member arranged back to back;

[0028] The second horizontal support body is composed of a third U-shaped support member and a fourth U-shaped support member arranged back to back.

[0029] Preferably, an ultraviolet lamp is provided in the second cavity.

[0030] Preferably, the first U-shaped frame is provided with a first notch, and the second U-shaped frame is provided with a second notch.

[0031] Preferably, a first horizontal mounting plate is arranged between the first vertical support body and the first horizontal support frame;

[0032] A second horizontal mounting plate is arranged between the second vertical support body and the second horizontal support frame.

[0033] Compared with the prior art, the technical effects of the present invention are as follows:

[0034] (1) The present invention develops a purification device that is easy to maintain. A door that can be opened is provided in the first cavity, and a first screw and a second screw are provided on the top plate. The first screw passes through the top plate, the first horizontal support, and the first U-shaped frame in sequence and abuts against the first support plate, and the second screw passes through the top plate, the second horizontal support, and the second U-shaped frame in sequence and abuts against the second support plate. When fastening the high-efficiency filter, the first screw and the second screw are tightened synchronously, and the cover of the fan presses the high-efficiency filter against the bottom frame, and a sealing fit is formed between the frame of the high-efficiency filter and the bottom frame, realizing the rapid fastening of the high-efficiency filter. When the high-efficiency filter needs to be replaced subsequently, the door is opened, the first screw and the second screw are loosened synchronously, the pressure of the cover of the fan pressing on the high-efficiency filter is released, and the high-efficiency filter is drawn out from the opened door, realizing the rapid replacement of the high-efficiency filter without opening the top plate and disassembling the fan, having the advantages of high assembly efficiency and high later-stage efficiency.

[0035] (2) The first primary filter is placed between the first pressing plate and the first rectangular frame body, and a screw is matched with the first screw hole and the first pressing plate is locked to the top plate, realizing the locking of the first primary filter with one screw; the second primary filter is placed between the second pressing plate and the second rectangular frame body, and a screw is matched with the second screw hole and the second pressing plate is locked to the top plate, realizing the locking of the second primary filter with one screw. Whether assembling, disassembling, or replacing the first primary filter and the second primary filter, only one screw needs to be locked or disassembled, having the advantages of high assembly efficiency and high later-stage efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a three-dimensional structural schematic diagram of the purification device that is easy to maintain according to the present invention.

[0037] Figure 2 It is an exploded structural schematic diagram of the purification device that is easy to maintain according to the present invention.

[0038] Figure 3 For the present invention Figure 2 Enlarged structural schematic diagram of part A.

[0039] Figure 4 It is a three-dimensional structural schematic diagram of the purification device that is easy to maintain according to the present invention.

[0040] Figure 5 For the present invention Figure 4 Enlarged structural schematic diagram of part B.

[0041] Figure 6 It is a three-dimensional structural schematic diagram of the purification device that is easy to maintain according to the present invention.

[0042] Figure 7 This is a three-dimensional structural schematic diagram of the purification equipment for easy maintenance of the present invention.

[0043] Figure 8 This is a three-dimensional structural schematic diagram of the first L-shaped bracket or the second L-shaped bracket of the present invention.

[0044] Figure 9 This is an exploded structural schematic diagram of the first side frame or the second side frame of the present invention.

[0045] Figure 10 For the present invention Figure 9 A magnified structural schematic diagram at position C.

[0046] In the figure: 1. First cavity; 11. Top plate; 111. First hollow part; 112. Second hollow part; 113. First rectangular frame; 1131. First groove; 114. First pressing plate; 1141. First screw hole; 1142. First protrusion; 115. Second rectangular frame; 1151. Second groove; 116. Second pressing plate; 1161. Second screw hole; 1162. Second protrusion; 12. Bottom frame; 121. Screw; 13. Door body; 131. First end of the door body; 132. Second end of the door body; 133. Space; 2. Second cavity; 21. Top frame; 211. First horizontal support frame; 212. Second horizontal support frame; 213. First horizontal mounting plate; 214. Second horizontal mounting plate; 22. First side frame; 23. Second side frame; 24. Glass door; 25. Ultraviolet lamp; 26. First observation window; 261. First glass; 262. First L-shaped sealing frame; 27. Second observation window; 271. Second glass; 272. Second L-shaped sealing frame; 3. Air purification component; 31. Primary filter; 311. First primary filter; 312. Second primary filter; 32. Fan; 321. Cover body; 322. First support plate; 323. Second support plate; 33. High-efficiency filter; 4. First L-shaped bracket; 41. First vertical support; 42. First horizontal support; 421. First U-shaped support; 422. Second U-shaped support; 5. Second L-shaped bracket; 51. Second vertical support; 52. Second horizontal support; 6. First screw; 61. First double nut; 7. First U-shaped frame; 71. First notch; 8. Second screw; 9. Second U-shaped frame. Detailed implementation manners

[0047] The present invention will be described in detail below with reference to the various implementation manners shown in the drawings. However, it should be noted that these implementation manners do not limit the present invention. Any equivalent transformation or substitution in terms of function, method, or structure made by those of ordinary skill in the art based on these implementation manners shall fall within the protection scope of the present invention.

[0048] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing 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 should not be construed as a limitation to the present invention. Example 1

[0049] Refer Figures 1 to 10 As shown, this embodiment discloses a specific implementation of a purification device that is convenient for maintenance.

[0050] Refer Figures 1 to 10As shown in the figure, a purification device that is convenient for maintenance includes a first cavity 1 and a second cavity 2 arranged vertically; an air purification component 3 is arranged in the first cavity 1, and the air purification component 3 successively includes at least one primary filter 31, at least one fan 32, and a high-efficiency filter 33 from top to bottom; the first cavity 1 includes a top plate 11, a bottom frame 12, and a door 13, and the bottom frame 12 is a rectangular frame; the second cavity 2 includes a top frame 21 and a first side frame 22 and a second side frame 23 arranged on both sides of the top frame 21. The first side frame 22 extends upward and is connected to the top plate 11, and the second side frame 23 extends upward and is connected to the top plate 11. The first end 131 of the door is hinged to the second side frame 23, and the door 13, the top plate 11, the bottom frame 12, the first side frame 22, and the second side frame 23 enclose the first cavity 1; the second end 132 of the door is locked to the first side frame 22 by screws. When the door 13 needs to be opened, the screws need to be removed first; the bottom frame 12 is fastened to the inner side of the top frame 21 by a plurality of screws 121, and the frame of the high-efficiency filter 33 is supported by the bottom frame 12. The bottom frame 12 is detachably installed on the top frame 21, realizing modular assembly, which is convenient for transportation in the case of non-assembly and also convenient for quick assembly; the top frame 21 includes a first horizontal support frame 211 and a second horizontal support frame 212 arranged in parallel; a first L-shaped bracket 4 is arranged on the first horizontal support frame 211, and a second L-shaped bracket 5 is arranged on the second horizontal support frame 212. The first L-shaped bracket 4 and the second L-shaped bracket 5 are symmetrically arranged. The first L-shaped bracket 4 includes a first vertical support 41 and a first horizontal support 42, and the first vertical support 41 is installed on the first horizontal support frame 211. The second L-shaped bracket 5 includes a second vertical support 51 and a second horizontal support 52, and the second vertical support 51 is installed on the second horizontal support frame 212; first support plate 322 and a second support plate 323 are arranged in parallel at the top of the cover 321 of the fan 32; a first screw 6 and a first U-shaped bracket 7 are arranged at the end of the first horizontal support 42, and the first U-shaped bracket 7 is fastened to the first support plate 322. The first screw 6 successively passes through the top plate 11, the first horizontal support 42, and the first U-shaped bracket 7. The end of the first horizontal support 42 is provided with a thread that cooperates with the first screw 6, and a first double nut 61 locks the end of the first screw 6 below the first U-shaped bracket 7. By screwing the first screw 6, the first screw 6 can apply pressure or release pressure to the first support plate 322;A second screw rod 8 and a second U-shaped frame 9 are arranged at the end of the second horizontal support 52. The second U-shaped frame 9 is fastened to the second support plate 323. The second screw rod 8 passes through the top plate 11, the second horizontal support 52 and the second U-shaped frame 9 in sequence. Threads matching the second screw rod 8 are arranged at the end of the second horizontal support 52. A second double nut (not shown due to occlusion) locks the end of the second screw rod 8 below the second U-shaped frame 9. By screwing the second screw rod 8, the second screw rod 8 can apply pressure or release pressure to the second support plate 323. Both the first screw rod 6 and the second screw rod 8 are exposed outside the top plate 11. By synchronously tightening the first screw rod 6 and the second screw rod 8, the first screw rod 6 and the second screw rod 8 respectively abut against and drive the first support plate 322 and the second support plate 323 to move downward. The cover 321 of the fan 32 driven by the first support plate 322 and the second support plate 323 moves downward accordingly. The cover 321 of the fan 32 presses the high-efficiency filter 33 against the bottom frame 12. Since the frame of the high-efficiency filter 33 is made of a soft material and has a certain elasticity, the frame of the high-efficiency filter 33 is squeezed and deformed to form a sealing fit with the bottom frame 12, realizing the quick fastening of the high-efficiency filter 33. When the high-efficiency filter 33 needs to be replaced subsequently, the door body 13 is opened, and the first screw rod 6 and the second screw rod 8 are synchronously loosened. The pressure of the cover 321 of the fan 32 pressing on the high-efficiency filter 33 is released, and the high-efficiency filter 33 is no longer under the pressure of the cover 321. The high-efficiency filter 33 is drawn out from the opened door body 13, realizing the quick replacement of the high-efficiency filter without opening the top plate 11 and disassembling the fan 32, having the advantages of high assembly efficiency and high later efficiency.;

[0051] See Figures 1 to 10, the heights of the first L-shaped bracket 4 and the second L-shaped bracket 5 need to span from both sides of the cover body 321 and the high-efficiency filter 33. The supporting strength of the first L-shaped bracket 4 and the second L-shaped bracket 5 should be large enough and the installation should be stable enough. For this purpose, the first horizontal support body 42 is composed of a first U-shaped support member 421 and a second U-shaped support member 422 arranged back to back. The notch of the first U-shaped support member 421 faces upward, and the notch of the second U-shaped support member 422 faces downward, so that the strength of the first horizontal support body 42 is large enough. The horizontal part of the first U-shaped support member 421 is provided with a thread for cooperating with the first screw 6, and the horizontal part of the second U-shaped support member 422 is also provided with a thread for cooperating with the first screw 6; the second horizontal support body 52 is composed of a third U-shaped support member and a fourth U-shaped support member (not shown due to occlusion) arranged back to back. The notch of the third U-shaped support member faces upward, and the notch of the fourth U-shaped support member faces downward, so that the strength of the second horizontal support body 52 is large enough. The horizontal part of the third U-shaped support member is provided with a thread for cooperating with the second screw 8, and the horizontal part of the fourth U-shaped support member is also provided with a thread for cooperating with the second screw 8. The structural principle of the second horizontal support body 52 is the same as that of the first horizontal support body 42; a first horizontal mounting plate 213 is provided between the first vertical support body 41 and the first horizontal support frame 211. The first horizontal mounting plate 213 serves as the mounting seat of the first vertical support body 41, so that the connection between the first vertical support body 41 and the first horizontal support frame 211 is stable; a second horizontal mounting plate 214 is provided between the second vertical support body 51 and the second horizontal support frame 212. The second horizontal mounting plate 214 serves as the mounting seat of the second vertical support body 51, so that the connection between the second vertical support body 51 and the second horizontal support frame 212 is stable; the first U-shaped frame 7 is provided with a first notch 71, and the second U-shaped frame 9 is provided with a second notch (not shown due to occlusion). The purpose of the first notch 71 is to facilitate the installation of the first screw 6 and the first double nut 61. The purpose and structure of the second notch are the same as those of the first notch 71.

[0052] See Figures 1 to 3, the installation and replacement principle of the primary filter 31 is as follows: A first hollow portion 111 and a second hollow portion 112 are provided on the top plate 11; A first rectangular frame 113 and a first pressing plate 114 are installed in the first hollow portion 111. A first groove 1131 is provided on one side of the first rectangular frame 113. First screw holes 1141 and first protrusions 1142 are respectively provided on both sides of the first pressing plate 114. A first primary filter 311 is placed between the first pressing plate 114 and the first rectangular frame 113; When installing the first primary filter 311, the first protrusion 1142 is inserted into the first groove 1131, and the first pressing plate 114 is locked to the top plate 11 by matching the screw with the first screw hole 1141. The first pressing plate 114 is provided with a plurality of air intake holes, realizing the locking or disassembly of the first primary filter 311 with one screw; A second rectangular frame 115 and a second pressing plate 116 are installed in the second hollow portion 112. A second groove 1151 is provided on one side of the second rectangular frame 115. Second screw holes 1161 and second protrusions 1162 are respectively provided on both sides of the second pressing plate 116. A second primary filter 312 is placed between the second pressing plate 116 and the second rectangular frame 115; When installing the second primary filter 312, the second protrusion 1162 is inserted into the second groove 1151, and the second pressing plate 116 is locked to the top plate 11 by matching the screw with the second screw hole 1161. The second pressing plate 116 is provided with a plurality of air intake holes, realizing the locking or disassembly of the second primary filter 312 with one screw.The primary filter 31 includes a first primary filter 311 and a second primary filter 312. The first primary filter 311 is placed between the first pressing plate 114 and the first rectangular frame 113. By matching a screw with the first screw hole 1141 and locking the first pressing plate 114 to the top plate 11, one screw locks the first primary filter 311. The second primary filter 312 is placed between the second pressing plate 116 and the second rectangular frame 115. By matching a screw with the second screw hole 1161 and locking the second pressing plate 116 to the top plate 11, one screw locks the second primary filter 312. Whether assembling or disassembling and replacing the first primary filter 311 and the second primary filter 312, only one screw needs to be locked or disassembled, which has the advantages of high assembly efficiency and high later-stage efficiency. The first screw rod 6 is arranged on the side of the first hollow part 111, and the second screw rod 8 is arranged on the side of the second hollow part 112. When the high-efficiency filter 33 needs to be replaced, open the door body 13, and simultaneously loosen the first screw rod 6 and the second screw rod 8. The pressure of the cover 321 of the fan 32 pressing on the high-efficiency filter 33 is released, and the high-efficiency filter 33 is no longer under the pressure of the cover 321. The high-efficiency filter 33 is taken out from the opened door body 13, realizing the rapid replacement of the high-efficiency filter without opening the top plate 11 and disassembling the fan 32, which has the advantages of high assembly efficiency and high later-stage efficiency. Through this embodiment, the fastening or disassembly points of the primary filter 31 and the high-efficiency filter 33 are both set on the top plate 11, with a clever structure, high assembly or disassembly efficiency, and convenient later replacement of the primary filter 31 and / or the high-efficiency filter 33.

[0053] See Figures 1 to 3, for facilitating the observation of the experimental situation inside the second cavity 2, a glass door 24 is provided on the second cavity 2. The two sides of the glass door 24 move up and down along the first side frame 22 and the second side frame 23. A space 133 for operating the lifting of the glass door 24 is provided inside the door body 13. When a user places experimental articles or operates inside the second cavity 2, the glass door 24 is lifted upward by 20 cm - 25 cm. When the blower 32 is turned on, air blows toward the second cavity 2 after passing through the primary filter 31 and the high-efficiency filter 33, providing a local ultra-clean environment for the second cavity 2; an ultraviolet lamp 25 is provided in the second cavity 2, and the ultraviolet lamp 25 is used for sterilization; a first observation window 26 is provided on the first side frame 22, and a second observation window 27 is provided on the second side frame 23; the first observation window 26 includes a first glass 261, and a first L-shaped sealing frame 262 is provided on the inner side around the four sides of the first observation window 26. Four first L-shaped sealing frames 262 form a rectangular frame for confining the first glass 261. Soft rubber strips are attached to the edges around the four sides of the first glass 261, and the soft rubber strips cooperate with the first L-shaped sealing frame 262. During installation, the first glass 261 with the attached soft rubber strips is directly installed in the rectangular frame formed by the four first L-shaped sealing frames 262, and the first glass 261 can be quickly installed with high installation efficiency; the second observation window 27 includes a second glass 271, and a second L-shaped sealing frame 272 is provided on the inner side around the four sides of the second observation window 27. Four second L-shaped sealing frames 272 form a rectangular frame for confining the second observation window 27. Soft rubber strips are attached to the edges around the four sides of the second glass 271, and the soft rubber strips cooperate with the second L-shaped sealing frame 272. During installation, the second glass 271 with the attached soft rubber strips is directly installed in the rectangular frame formed by the four second L-shaped sealing frames 272, and the second glass 271 can be quickly installed with high installation efficiency.

[0054] The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to better illustrate the principles of the invention and its practical application, and to enable those of ordinary skill in the art to understand the invention and design various embodiments with various modifications suitable for specific purposes.

Claims

1. A purification device that is easy to maintain, characterized in that: It comprises a first cavity and a second cavity arranged up and down; An air purification component is arranged in the first cavity, and the air purification component includes at least one primary filter, at least one fan and a high efficiency filter in order from top to bottom; The first cavity includes a top plate, a bottom frame and a door body; The second cavity comprises a top frame and a first side frame and a second side frame arranged on both sides of the top frame, the first side frame extends upward and is connected to the top plate, the second side frame extends upward and is connected to the top plate, and the first end of the door body is hinged to the second side frame; The bottom frame is fastened to the inner side of the top frame by a plurality of screws, and the frame of the high efficiency filter is supported by the bottom frame; The top frame includes a first horizontal support frame and a second horizontal support frame arranged in parallel; A first L-shaped bracket is arranged on the first horizontal support frame, and a second L-shaped bracket is arranged on the second horizontal support frame, the first L-shaped bracket and the second L-shaped bracket are arranged symmetrically, the first L-shaped bracket includes a first vertical support body and a first horizontal support body, and the second L-shaped bracket includes a second vertical support body and a second horizontal support body; A first support plate and a second support plate are arranged in parallel on the top of the fan cover; A first screw and a first U-shaped frame are arranged at the end of the first horizontal support body, the first U-shaped frame is fastened to the first support plate, the first screw passes through the top plate, the first horizontal support body and the first U-shaped frame in sequence, a thread matching with the first screw is arranged at the end of the first horizontal support body, and a first double nut locks the end of the first screw to the first U-shaped frame; A second screw and a second U-shaped frame are arranged at the end of the second horizontal support body, the second U-shaped frame is fastened to the second support plate, the second screw passes through the top plate, the second horizontal support body and the second U-shaped frame in sequence, a thread matching with the second screw is arranged at the end of the second horizontal support body, and a second double nut locks the end of the second screw to the second U-shaped frame; The first screw and the second screw are tightened synchronously, and the cover of the fan presses the high-efficiency filter onto the bottom frame, so that a sealing fit is formed between the frame of the high-efficiency filter and the bottom frame; The first screw and the second screw are loosened synchronously, the pressure of the fan cover on the high-efficiency filter is released, and the high-efficiency filter is pulled out from the opened door; A first hollow portion and a second hollow portion are provided on the top plate; A first rectangular frame and a first pressing plate are installed in the first hollow portion, a first groove is provided on one side of the first rectangular frame, a first screw hole and a first protrusion are provided on both sides of the first pressing plate, a first primary filter is placed between the first pressing plate and the first rectangular frame, the first protrusion is inserted into the first groove, the first pressing plate is locked to the top plate by screws and the first screw holes, and a plurality of air inlet holes are provided on the first pressing plate; A second rectangular frame and a second pressing plate are installed in the second hollow portion, a second groove is provided on one side of the second rectangular frame, a second screw hole and a second protrusion are provided on both sides of the second pressing plate, a second primary filter is placed between the second pressing plate and the second rectangular frame, the second protrusion is inserted into the second groove, the second pressing plate is locked to the top plate by screws and the second screw holes, and a plurality of air inlet holes are provided on the second pressing plate; The first screw is disposed on the side of the first hollow portion, and the second screw is disposed on the side of the second hollow portion; The first screw and the second screw are tightened synchronously, and the first screw and the second screw respectively resist and drive the first support plate and the second support plate to move downward, and the first support plate and the second support plate drive the cover of the fan to move downward accordingly, and the cover of the fan presses the high-efficiency filter against the bottom frame, and the frame of the high-efficiency filter is squeezed and deformed and forms a sealing fit with the bottom frame; when the high-efficiency filter needs to be replaced later, the door body is opened, and the first screw and the second screw are loosened synchronously, the pressure of the cover of the fan on the high-efficiency filter is released, the high-efficiency filter is no longer subjected to the pressure of the cover body, and the high-efficiency filter is pulled out from the opened door body.

2. A purification device that is easy to maintain as claimed in claim 1, characterized in that: A first observation window is provided on the first side frame, and a second observation window is provided on the second side frame; The first observation window includes a first glass, a first L-shaped sealing frame is arranged around the inner side of the first observation window, and soft adhesive strips are attached to the edges of the first glass, and the soft adhesive strips cooperate with the first L-shaped sealing frame; The second observation window includes a second glass, a second L-shaped sealing frame is arranged around the inner side of the second observation window, and soft adhesive strips are attached to the edges of the second glass, and the soft adhesive strips cooperate with the second L-shaped sealing frame.

3. A purification device easy to maintain as claimed in claim 1 or 2, characterized in that: The second end of the door body is screwed to the first side frame.

4. A purification device easy to maintain as claimed in claim 1 or 2, characterized in that: The second cavity is provided with a glass door, and two sides of the glass door move up and down along the first side frame and the second side frame.

5. A purification device easy to maintain as claimed in claim 1 or 2, characterized in that: The first horizontal support body is composed of a first U-shaped support member and a second U-shaped support member arranged back to back; The second horizontal support body is composed of a third U-shaped support member and a fourth U-shaped support member which are arranged back to back.

6. A purification device easy to maintain as claimed in claim 1 or 2, characterized in that: An ultraviolet lamp is arranged in the second cavity.

7. A purification device easy to maintain as claimed in claim 1 or 2, characterized in that: The first U-shaped frame is provided with a first notch, and the second U-shaped frame is provided with a second notch.

8. A purification device easy to maintain as claimed in claim 1 or 2, characterized in that: A first horizontal mounting plate is disposed between the first vertical support body and the first horizontal support frame; A second horizontal mounting plate is disposed between the second vertical support body and the second horizontal support frame.

Images