Magnetic type exhaust fan

Abstract

The utility model discloses a magnetic suction type exhaust fan, which relates to the technical field of exhaust fans and comprises a ceiling with a mounting hole; an air inlet is formed in the lower side of the case, the air inlet corresponds to the mounting hole, and airflow can sequentially penetrate through the mounting hole and the air inlet to enter the case; the clamping plate comprises a vertical part and an extending part, the vertical part is connected with the outer side wall of the case, and the lower side of the extending part abuts against the upper side of the ceiling; the side edge of the magnet is provided with a side magnetic attraction surface, and the side magnetic attraction surface is connected with the vertical part in a magnetic attraction mode; screws or other complex fixing structures are not needed in the installation process, the clamping plate is attracted through the magnetic attraction force of the magnets, the clamping plate clamps the ceiling, installation of the exhaust fan can be conveniently completed, the installation efficiency of the exhaust fan can be improved, and the exhaust fan can be conveniently disassembled to be cleaned and maintained.

Description

TECHNICAL FIELD

[0001] The utility model relates to exhaust fan technical field especially relates to a magnetic exhaust fan. BACKGROUND

[0002] The exhaust fan is used more and more commonly in family and various small hotels, small shops and enterprise meeting room etc. The main purpose of the exhaust fan is to discharge the harmful gas, dirty air, humidity etc. in the room to the outside, and keep the air in the room clean. At present, the exhaust fan needs to be installed on the ceiling, and needs screw, buckle or other fixing structure to fix the exhaust fan. But in practice, these fixing structures are not convenient to install or disassemble, which not only affects the installation efficiency, but also is not conducive to the cleaning and maintenance of the exhaust fan. SUMMARY

[0003] The utility model discloses a magnetic exhaust fan, which can solve the technical problems in the prior art.

[0004] According to the magnetic exhaust fan of the utility model embodiments, the ceiling has the installation hole, the machine case is located on the upside of the ceiling, the lower side of the machine case is provided with the air inlet, the air inlet corresponds with the installation hole, and airflow can enter the machine case through the installation hole and the air inlet in turn.

[0005] According to some embodiments of the utility model, the side opening is provided on the side wall of the machine case, the clamping edge is provided on the hole wall of the side opening, the magnet covers the side opening of the inner side wall of the machine case, the side magnetic attraction surface is connected with the vertical part through the side opening by magnetic attraction, and the clamping edge is located between the side magnetic attraction surface and the vertical part.

[0006] According to some embodiments of the utility model, the limiting plate is provided on the inner side wall of the machine case, and the limiting plate clamps the side wall position of the left and right sides and the upper side of the magnet.

[0007] According to some embodiments of the utility model, the vertical part is connected with the extension part, the vertical part and the extension part form the "L" shape structure, the lower end of the vertical part is provided with the positioning convex part, and the positioning convex part abuts against the hole wall of the installation hole.

[0008] According to some embodiments of the utility model, the magnet is connected to the inner side wall of the case, a hand holding convex strip is arranged on the other side edge of the magnet, the hand holding convex strip extends along the up-down direction, and the lower end of the hand holding convex strip extends to the lower end surface position of the magnet.

[0009] According to some embodiments of the utility model, a panel is connected below the case, the panel is located below the mounting hole, a gap is left between the lower side of the case, the mounting hole wall and the upper side of the panel as an air inlet gap, airflow can enter the case in sequence through the air inlet gap and the air inlet, a panel magnetic attraction part is arranged on the upper side of the panel, the lower end of the magnet has a bottom magnetic attraction surface, and the bottom magnetic attraction surface is connected with the panel magnetic attraction part through magnetic attraction.

[0010] According to some embodiments of the utility model, a panel boss is arranged on the upper side of the panel, the panel boss is in the shape of a prism, the side wall of the panel boss has a prism inclined surface, the upper side of the panel boss extends into the air inlet, a gap is left between the prism inclined surface and the inner wall of the air inlet as the air inlet gap, and the panel magnetic attraction part is located on the upper end surface of the panel boss.

[0011] According to some embodiments of the utility model, a side wall is arranged on the upper side of the ceiling, a side magnetic attraction plate is arranged on the side wall, and the side magnetic attraction surface is connected with the side magnetic attraction plate through magnetic attraction.

[0012] According to some embodiments of the utility model, a centrifugal fan is arranged in the case, an air outlet is arranged on the side wall of the case, a detachable air outlet connecting piece is connected to the air outlet, the air outlet connecting piece comprises an external interface and a mounting plate, the air outlet connecting piece is connected with the case through the mounting plate, and the air outlet connecting piece is connected with an external exhaust pipe through the external interface.

[0013] According to some embodiments of the utility model, a centrifugal fan is arranged in the case, a detachable fan support is arranged on the lower side of the inner side wall of the case, the fan support comprises a middle support connecting plate and two side support parts, the support connecting plate is connected with the case through screws, and the upper side of the support part abuts against the lower side of the centrifugal fan.

[0014] The magnetic type exhaust fan according to the utility model embodiment has at least the following technical effects:

[0015] 1. The installation process does not need screws or other complex fixing structures, the clamping plate is attracted and clamped by the magnet magnetic force, and the installation of the exhaust fan can be conveniently completed, the exhaust fan installation efficiency is improved, and the exhaust fan can be conveniently disassembled for cleaning and maintenance work;

[0016] 2. The magnet has a hand holding protrusion structure, which facilitates workers to hold the hand holding protrusion to disassemble the magnet in the cabinet;

[0017] 3. The panel is located below the mounting hole of the ceiling, and is magnetically connected with the panel magnetic attraction part of the panel through the bottom magnetic attraction surface of the magnet, which facilitates the installation and disassembly of the panel, and the panel can shield the air inlet to avoid foreign matters directly entering the cabinet through the air inlet.

[0018] The additional aspects and advantages of the present application will be partially given in the following description, and some will become obvious from the following description, or be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0019] The additional aspects and advantages of the present application will be partially given in the following description, and some will become obvious from the following description, or be understood by the practice of the present application.

[0020] Figure 1 is a perspective view of the present application;

[0021] Figure 2 is a front view structural schematic diagram of the present application when having a side wall;

[0022] Figure 3 is Figure 2 a local enlarged view of A area in the figure;

[0023] Figure 4 is a top view structural schematic diagram of the present application when not having a side wall;

[0024] Figure 5 is Figure 4 a local enlarged view of B area in the figure;

[0025] Figure 6 is a perspective view of the present application;

[0026] Figure 7 is a perspective view of the present application.

[0027] Reference signs:

[0028] Ceiling 100, mounting hole 101, side wall 110, side magnetic plate 111; cabinet 200, air inlet 210, air outlet 220, side opening 230, clamping edge 231, limiting plate 240, air outlet connecting piece 250, external interface 251, mounting plate 252, hinge baffle 253, fan support 260, support connecting plate 261, support support part 262; clamping plate 300, vertical part 310, extension part 320, positioning convex part 330; magnet 400, side magnetic surface 410, magnetic surface step edge 411, bottom magnetic surface 420, handshake convex strip 430; panel 500, air inlet gap 501, panel boss 510, panel magnetic part 511, prism inclined surface 512; centrifugal fan 600. DETAILED DESCRIPTION

[0029] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used merely for the purpose of explaining the present application, and should not be construed in a limiting sense regarding the present application.

[0030] In the description of the present application, it should be understood that, in relation to the orientation description, for example, the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as a limitation on the present application.

[0031] In the description of the present application, the meaning of multiple is more than two, greater than, less than, more than, etc. and is not inclusive of the number. If it is described as first, second, etc. only for the purpose of distinguishing technical features, it cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0032] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0033] The following refers to Figure 1 and Figure 2 The magnetic type exhaust fan according to the embodiments of the present application is described.

[0034] As Figure 1 and Figure 2As shown, the magnetic exhaust fan according to the utility model embodiment, including case 200, clamping plate 300 and magnet 400. The utility model exhaust fan is installed on the ceiling 100.

[0035] Referring to Figure 2 、 Figure 3 , the ceiling 100 has a mounting hole 101; the case 200 is located on the upper side of the ceiling 100, and the lower side of the case 200 is provided with an air inlet 210 corresponding to the mounting hole 101, and airflow can enter the case 200 through the mounting hole 101 and the air inlet 210 in sequence; the clamping plate 300 is connected to the outer side wall of the case 200, and the clamping plate 300 includes a vertical part 310 and an extension part 320, the vertical part 310 is connected to the outer side wall of the case 200, and the lower side of the extension part 320 abuts against the upper side of the ceiling 100; the magnet 400 is connected to the inner side or the outer side of the side wall of the case 200, and the side edge of the magnet 400 has a side magnetic surface 410, and the side magnetic surface 410 is connected to the vertical part 310 by magnetic attraction.

[0036] For example, as shown in Figure 1 、 Figure 2 and Figure 3 , the ceiling 100 has a mounting hole 101. The case 200 is located on the upper side of the ceiling 100, and the case 200 is fixed on the ceiling 100. The lower side of the case 200 is provided with an air inlet 210 corresponding to the mounting hole 101, and airflow can enter the case 200 through the mounting hole 101 and the air inlet 210 in sequence, so that the exhaust fan of the utility model can complete the work of sucking air in the room. The clamping plate 300 is connected to the outer side wall of the case 200, and the clamping plate 300 is fixed on the outer side wall of the case 200. The clamping plate 300 includes a vertical part 310 and an extension part 320, the vertical part 310 is connected to the outer side wall of the case 200, and the lower side of the extension part 320 abuts against the upper side of the ceiling 100, so that the case 200 can be fixed on the ceiling 100 through the clamping plate 300. The magnet 400 is connected to the inner side or the outer side of the side wall of the case 200. The side edge of the magnet 400 has a side magnetic surface 410, and the side magnetic surface 410 is connected to the vertical part 310 by magnetic attraction. That is, the case 200 and the clamping plate 300 are connected by the magnet 400 in a magnetic attraction mode.

[0037] In actual work, first, the card plate 300 to be installed is placed on the ceiling 100 through the installation hole 101, and the magnet 400 is installed on the cabinet 200. Then, the cabinet 200 is passed through the installation hole 101 from bottom to top, and the card plate 300 is installed one by one at the positions corresponding to the magnets 400, so that the magnets 400 can attract the card plate 300. Finally, the cabinet 200 can be positioned on the ceiling 100, ensuring that the lower side of the extending part 320 of the card plate 300 can stably abut against the upper side of the ceiling 100, and the air inlet 210 on the lower side of the cabinet 200 is positioned with the installation hole 101, so that the installation of the exhaust fan of the utility model is completed.

[0038] The above installation process does not require screws or other complex fixing structures, and the installation of the exhaust fan of the utility model can be conveniently completed. In this way, the installation efficiency of the exhaust fan can be improved, and the exhaust fan can be conveniently disassembled for cleaning and maintenance work.

[0039] In some embodiments of the utility model, referring to Figure 1 , the side wall of the cabinet 200 is provided with a side opening 230, referring to Figure 4 、 Figure 5 , the side opening 230 is provided with a clamping edge 231 on the hole wall, the magnet 400 covers the side opening 230 on the inner side wall of the cabinet 200, the side magnetic attraction surface 410 passes through the side opening 230 and is magnetically connected with the vertical part 310, and the clamping edge 231 is located between the side magnetic attraction surface 410 and the vertical part 310. The magnet 400 is located on the side opening 230 of the inner side wall of the cabinet 200, which facilitates the disassembly of the magnet 400. Only by reaching through the air inlet 210 can the magnet 400 be directly disassembled. After the magnet 400 is disassembled, the card plate 300 can be easily disassembled because of the loss of the adsorption effect of the magnetic attraction force.

[0040] The side opening 230 is provided on the side wall of the cabinet 200, and the clamping edge 231 is provided on the hole wall of the side opening 230. Not only can the stability of the structure of the side opening 230 be ensured, but also the magnetic attraction force of the side magnetic attraction surface 410 can pass through the side opening 230 after the magnet 400 covers the side opening 230 of the cabinet 200, so that the magnet 400 and the vertical part 310 are magnetically connected. In this way, the close combination between the magnet 400 and the cabinet 200 can be ensured. The clamping edge 231 is located between the side magnetic attraction surface 410 and the vertical part 310, which can clamp the magnet 400, avoid the magnet 400 from being loosened out of the cabinet 200 by directly passing through the side opening 230, and further enhance the stability of the above connection.

[0041] In some embodiments of the utility model, the side magnetic surface 410 is provided with a magnetic surface step edge 411 on the edge, the magnetic surface step edge 411 clamps the clamping edge 231, so that the magnet 400 will not be offset after covering the side opening 230, and the installation of the magnet 400 is more stable. In addition, the design of the magnetic surface step edge 411 can also make the side magnetic surface 410 pass through the side opening 230 and shorten the distance between the vertical part 310, so that the side magnetic surface 410 is more attached to the vertical part 310 to ensure the magnetic attraction effect.

[0042] In some embodiments of the utility model, the inside wall of the case 200 is provided with a limiting plate 240, the limiting plate 240 clamps the side wall position of the left and right sides and the upper side of the magnet 400. The limiting plate 240 can limit the magnet 400, and the upper side of the magnet 400 supports the limiting plate 240 on the upper side, ensuring that the magnet 400 cooperates with the clamping plate 300 to support the case 200, and ensuring that the exhaust fan of the utility model is installed stably enough.

[0043] In some embodiments of the utility model, the outside wall of the case 200 is also provided with a limiting plate 240, which is used to press against the upper side position of the vertical part 310, ensuring that the exhaust fan of the utility model is installed stably enough.

[0044] In some embodiments of the utility model, the magnet 400 is connected to the outside wall of the case 200, and the magnet 400 is magnetically connected with the vertical part 310.

[0045] In some embodiments of the utility model, the magnet 400 and the case 200 can be fixedly connected through adhesive or screws.

[0046] In some embodiments of the utility model, referring to Figure 3 、 Figure 6 , the lower end of the vertical part 310 is connected with the extension part 320, the vertical part 310 and the extension part 320 form an "L" shaped structure, the lower end of the vertical part 310 is provided with a positioning convex part 330, and the positioning convex part 330 presses against the hole wall of the mounting hole 101.

[0047] In some embodiments of the utility model, referring to Figure 4 、 Figure 5 , the magnet 400 is connected to the inside wall of the case 200, referring to Figure 7 , the other side of the magnet 400 is provided with a hand holding convex strip 430, the hand holding convex strip 430 extends along the up-down direction, the lower end of the hand holding convex strip 430 extends to the lower end surface position of the magnet 400, and the worker can hold the hand holding convex strip 430 to disassemble the magnet 400.

[0048] In some embodiments of the utility model, the extension part 320 is a horizontal plate structure, ensuring that the extension part 320 can stably support the ceiling 100.

[0049] In some embodiments of the utility model, the extension part 320 is a horizontal rod structure, and the clamping plate 300 is more portable.

[0050] In some embodiments of the utility model, referring to Figure 1 , Figure 2 The panel 500 is connected below the case 200, is located below the mounting hole 101, and can shield the air inlet 210 to avoid foreign matters directly entering the case 200 through the air inlet 210. Referring to Figure 3 , a gap is left between the lower side of the case 200 and the upper side of the panel 500 as an air inlet gap 501, airflow can pass through the air inlet gap 501 and the air inlet 210 in sequence to enter the case 200, the upper side of the panel 500 is provided with a panel magnetic attraction part 511, the lower end of the magnet 400 is provided with a bottom magnetic attraction surface 420, and the bottom magnetic attraction surface 420 is connected with the panel magnetic attraction part 511 through magnetic attraction.

[0051] After the panel 500 is well covered on the mounting hole 101, a certain space is intentionally left between the hole wall of the mounting hole 101 and the upper side of the panel 500 to form an air inlet gap 501 for air circulation, ensuring that the exhaust fan can normally work. In order to ensure the stable installation of the panel 500, the bottom magnetic attraction surface 420 of the magnet 400 and the panel magnetic attraction part 511 of the panel 500 are attracted to each other through magnetic force, thereby realizing the simple and stable connection of the panel 500.

[0052] In some embodiments of the utility model, the upper side of the panel 500 is provided with a panel boss 510, the panel boss 510 is a prismatic table, the side wall of the panel boss 510 is provided with a prismatic inclined surface 512, the upper side of the panel boss 510 extends into the air inlet 210, a gap is left between the prismatic inclined surface 512 and the inner wall of the air inlet 210 as an air inlet gap 501, and the panel magnetic attraction part 511 is located on the upper end face of the panel boss 510.

[0053] The upper panel boss 510 of the panel 500 adopts a prism shape, which can improve the structural strength of the panel 500. The side wall of the panel boss 510 adopts an inclined surface design with a prism inclined surface 512, which not only facilitates the upper side of the panel boss 510 to extend into the air inlet 210 of the cabinet 200, but also facilitates the panel 500 to be designed to be larger in area while ensuring the structural firmness of the panel. The upper end of the panel boss 510 extends and extends into the inside of the air inlet 210, and a certain gap is ensured between the prism inclined surface 512 and the inner wall of the air inlet 210 to form an air inlet gap 501 for air circulation, so that the prism inclined surface 512 can play a role in guiding the air inlet, and ensure that the air suction of the exhaust fan works normally. The panel magnetic attraction part 511 is arranged on the upper end face of the panel boss 510, and the magnetic attraction part can be more easily connected with the bottom magnetic attraction surface 420 of the magnet 400, thereby ensuring the stability and safety of the entire panel.

[0054] In some embodiments of the present application, referring to Figure 2 , the upper side of the ceiling 100 is provided with a side wall 110, and the side wall 110 is provided with a side magnetic attraction plate 111. The side magnetic attraction surface 410 is connected with the side magnetic attraction plate 111 in a magnetic attraction manner, so that the side edge of the cabinet 200 can be installed in close contact with the side wall 110. This design is suitable for installing the exhaust fan near the wall of the ceiling.

[0055] In some embodiments of the present application, referring to Figure 1 , the centrifugal fan 600 is arranged in the cabinet 200, that is, the exhaust fan of the present application performs air suction and exhaust work through the centrifugal fan 600. The side wall of the cabinet 200 is provided with an air outlet 220, and the air outlet 220 is connected with a detachable air outlet connecting piece 250. The air outlet connecting piece 250 includes an external interface 251 and a mounting plate 252. The air outlet connecting piece 250 is connected with the cabinet 200 through the mounting plate 252, and the air outlet connecting piece 250 is connected with an exhaust pipe through the external interface 251. Thus, the exhaust pipe of the exhaust fan of the present application is conveniently connected. The air outlet connecting piece 250 can be flexibly replaced according to different exhaust pipes or wall exhaust hole shapes.

[0056] In some embodiments of the present application, the inner side wall of the external interface 251 is provided with a hinge baffle 253, and the hinge baffle 253 is provided with hinge plate shafts on the left and right sides. The hinge baffle 253 is connected with the inner wall of the external interface 251 through the hinge plate shafts, so that the hinge baffle 253 can rotate up and down. When the hinge baffle 253 is in a vertical state, the hinge baffle 253 blocks the air outlet 220 of the cabinet 200, so as to prevent foreign matters from entering the cabinet 200. When the centrifugal fan 600 is started, the air outlet of the centrifugal fan 600 blows the hinge baffle 253 open, and the hinge baffle 253 is in a horizontal state, so as to ensure that the exhaust work is normally performed.

[0057] In some embodiments of the utility model, centrifugal fan 600 is arranged in case 200, namely the utility model exhaust fan inhales and exhausts through centrifugal fan 600. The lower side of the inner side wall of case 200 is provided with detachable fan support 260, fan support 260 includes middle support connecting plate 261 and both sides support support part 262, support connecting plate 261 is connected with case 200 by screw, and the upper side of support support part 262 supports centrifugal fan 600. Fan support 260 provides support force for centrifugal fan 600, and ensures that centrifugal fan 600 is installed more stably and reliably in case 200.

[0058] Other configurations and operations of the exhaust fan according to the embodiments of the utility model are known to those skilled in the art and will not be described in detail here.

[0059] The following description is made with reference to Figure 1 and Figure 2 A specific embodiment is described in detail to illustrate the magnetic exhaust fan according to the embodiments of the utility model. It should be understood that the following description is only exemplary and not a specific limitation of the utility model.

[0060] As shown in Figure 1 and Figure 4 The magnetic exhaust fan according to the embodiments of the utility model includes case 200, four clamping plates 300, four magnets 400, panel 500 and centrifugal fan 600. The utility model exhaust fan is installed on ceiling 100. Ceiling 100 has mounting hole 101.

[0061] Centrifugal fan 600 is located in case 200. Case 200 is provided with air inlet 210, air outlet 220, side opening 230, clamping edge 231, limiting plate 240, air outlet connecting piece 250, external interface 251, mounting plate 252, hinge baffle 253, fan support 260, support connecting plate 261 and support support part 262.

[0062] Clamping plate 300 is arranged on the left and right sides of case 200. Clamping plate 300 includes vertical part 310, protruding part 320 and positioning convex part 330. Magnets 400 are arranged on the left and right sides of case 200. Magnets 400 include side magnetic surface 410, magnetic surface step edge 411, bottom magnetic surface 420 and hand holding convex strip 430.

[0063] Panel 500 is located below case 200. Panel 500 is provided with panel boss 510, panel magnetic attraction part 511 and prism inclined surface 512.

[0064] According to the magnetic type exhaust fan, when the exhaust fan needs to be installed, the clamping plate 300 is placed on the ceiling 100 through the installation hole 101, the magnet 400 is installed on the case 200, then the case 200 is passed through the installation hole 101 from bottom to top, the clamping plate 300 is installed on the corresponding position of the magnet 400, the magnet 400 can attract the clamping plate 300, finally, the case 200 is positioned on the ceiling 100, and the installation of the exhaust fan is completed; the installation process does not need screws or other complex fixing structures, and the installation of the exhaust fan can be conveniently completed, so that the installation efficiency of the exhaust fan is improved, and the exhaust fan can be conveniently disassembled for cleaning and maintenance.

[0065] In the description of the present specification, the description referring to the terms "some embodiments" or "it is conceivable that" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0066] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A magnetic exhaust fan, characterized by, The utility model relates to a kind of air inlet structure of computer machine case, including: Ceiling (100) with mounting hole (101); Machine case (200) is located the upside of the ceiling (100), the lower side of the machine case (200) is provided with air inlet (210), the air inlet (210) corresponds with the mounting hole (101), airflow can pass through the mounting hole (101) and the air inlet (210) in sequence into the machine case (200); Clamp plate (300) is connected on the outer side wall of the machine case (200), and the clamp plate (300) includes vertical part (310) and extension part (320), the vertical part (310) is connected with the outer side wall of the machine case (200), and the lower side of the extension part (320) is pressed against the upper side of the ceiling (100); Magnet (400) is connected to the inner side or outer side of the side wall of the machine case (200), and the side edge of the magnet (400) has side magnetic surface (410), and the side magnetic surface (410) is connected with the vertical part (310) by magnetic attraction.

2. The magnetic exhaust fan according to claim 1, characterized in that, The side wall of the machine case (200) is provided with side opening (230), and the hole wall of the side opening (230) is provided with clamping edge (231), the magnet (400) covers the side opening (230) of the inner side wall of the machine case (200), the side magnetic surface (410) passes through the side opening (230) and is connected with the vertical part (310) by magnetic attraction, and the clamping edge (231) is located between the side magnetic surface (410) and the vertical part (310).

3. The magnetic exhaust fan according to claim 2, characterized in that, The inner side wall of the machine case (200) is provided with limit plate (240), and the limit plate (240) clamps the side wall position of the left and right sides and the upper side of the magnet (400).

4. The magnetic exhaust fan according to claim 1, wherein The lower end of the vertical part (310) is connected with the extension part (320), and the vertical part (310) and the extension part (320) form a "L" shape structure, and the lower end of the vertical part (310) is provided with positioning convex part (330), and the positioning convex part (330) is pressed against the hole wall of the mounting hole (101).

5. The magnetic exhaust fan according to claim 1, wherein The magnet (400) is connected to the inner side wall of the machine case (200), and the other side edge of the magnet (400) is provided with hand holding convex strip (430), the hand holding convex strip (430) extends along the up-down direction, and the lower end of the hand holding convex strip (430) extends to the lower end surface position of the magnet (400).

6. The magnetic exhaust fan according to claim 1, wherein The machine case (200) is connected with panel (500) below, and the panel (500) is located the lower side of the mounting hole (101), and the hole wall of the lower side of the machine case (200), the mounting hole (101) and the upper side of the panel (500) is left with gap as air gap (501), airflow can pass through the air gap (501) and the air inlet (210) in sequence into the machine case (200), and the upper side of the panel (500) is provided with panel magnetic attraction part (511), and the lower end of the magnet (400) has bottom magnetic surface (420), and the bottom magnetic surface (420) is connected with the panel magnetic attraction part (511) by magnetic attraction.

7. The magnetic exhaust fan according to claim 6, characterized in that The panel (500) is provided with a panel boss (510) on the upper side, the panel boss (510) is a prism, the side wall of the panel boss (510) has a prism inclined surface (512), the panel boss (510) upper side extends into the air inlet (210), the prism inclined surface (512) and the inner wall of the air inlet (210) leave a gap as the air inlet gap (501), the panel magnetic attraction part (511) is located on the upper end surface of the panel boss (510).

8. The magnetic exhaust fan according to claim 1, wherein The ceiling (100) is provided with a side wall (110) on the upper side, the side wall (110) is provided with a side magnetic attraction plate (111), the side magnetic attraction surface (410) and the side magnetic attraction plate (111) are connected by magnetic attraction.

9. The magnetic exhaust fan according to claim 1, wherein The cabinet (200) is provided with a centrifugal fan (600), the side wall of the cabinet (200) is provided with an air outlet (220), the air outlet (220) is connected with a detachable air outlet connecting piece (250), the air outlet connecting piece (250) includes an external interface (251) and a mounting plate (252), the air outlet connecting piece (250) is connected with the cabinet (200) through the mounting plate (252), and the air outlet connecting piece (250) is connected with the cabinet (200) through the mounting plate (252). The air outlet connecting piece (250) is connected with the cabinet (200) through the external interface (251).

10. The magnetic exhaust fan according to claim 1, wherein The cabinet (200) is provided with a centrifugal fan (600), the lower side of the inner side wall of the cabinet (200) is provided with a detachable fan support (260), the fan support (260) includes a middle support connecting plate (261) and two side support parts (262), the support connecting plate (261) and the cabinet (200) are connected by screws, and the upper side of the support part (262) supports the lower side of the centrifugal fan (600).

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