Ventilation fan with quick release structure

Abstract

The utility model belongs to the technical field of ventilation fans, and particularly relates to a ventilation fan with a quick release structure, which comprises a shell, the shell is of a structure with an opening at the top and a hollow inside, an upper cover is fixed at the opening of the upper surface of the shell through bolts, an air inlet is formed in the rear side of the shell, and air outlets are symmetrically formed in the front side of the shell; by arranging a fixing mechanism and arranging a quick release assembly in the fixing mechanism, a second closing cover can be quickly disassembled by pulling an anti-skid head, and an odor removal block on a mounting frame is replaced, so that the defects that in a traditional device, the odor removal block is inconvenient to replace, and the odor removal effect is reduced after long-time use are overcome; the dustproof net is arranged at the position of the air inlet, the dustproof net is used for dedusting and filtering air entering the inner cavity of the shell, dust in outside air is prevented from entering a room through the shell, the purity of the air after ventilation is greatly improved, and the comfort of a user is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of ventilation fans, and particularly relates to a ventilation fan with a quick-release structure. Background Technique

[0002] During the sewage treatment process in a waterworks, due to the large odor in the sewage, the air in the plant environment has a certain odor, which often causes great trouble to the staff working in the plant. In order to increase the air flow in the working area of the staff, reduce the impact of the odor on the staff, and improve the comfort of the working environment, it is urgent to install corresponding ventilation fans in the office plant.

[0003] The existing ventilation fans often only have a simple installation bracket and a ventilation fan fixed in the installation bracket, and a protective partition net is arranged outside the ventilation fan. The rotation of the fan blades in the ventilation fan drives the air flow, and the functionality is relatively single. Some ventilation fans on the market are provided with a deodorizing mechanism at the air outlet to remove the odor in the air. As the deodorizing block in the deodorizing mechanism is continuously used and consumed, the deodorizing effect of the deodorizing block decreases. In order to continue to ensure the deodorizing effect on the air, the deodorizing block needs to be replaced in time. However, because the deodorizing mechanism of such fans is installed inside the fan and is not easy to disassemble and replace, it greatly increases the time-consuming during later maintenance. In order to ensure the effective cleaning and filtering of the odor in the air, it is urgent to design a ventilation fan that is convenient for users to quickly disassemble and install. In view of this, we propose a ventilation fan with a quick-release structure. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a ventilation fan with a quick-release structure to solve the problems raised in the above background technique.

[0005] In view of this, the utility model provides a ventilation fan with a quick-release structure, including:

[0006] A housing, the housing has a top-opening and internally hollow structure. The upper surface opening of the housing is fixed with an upper cover by bolts. An air inlet is provided at the rear side of the housing, and air outlets are symmetrically arranged at the front side of the housing. A fan main body is installed inside the housing. An installation frame is arranged at the front side of the fan main body and near the two air outlets. A deodorizing block is arranged inside the installation frame. A dust-proof net is installed at the rear side of the fan main body and inside the air inlet. A magnetic strip is pasted on the side of the dust-proof net, and the dust-proof net is magnetically connected to the housing through the magnetic strip;

[0007] A positioning component, the positioning component is arranged on the periphery of the fan main body and is used for positioning and fixing the fan main body;

[0008] A fixing mechanism, which is arranged in the inner cavity of the housing and around the mounting frame, and is used to fix the mounting frame;

[0009] Two quick-release components, which are symmetrically arranged and both arranged in the fixing mechanism, and are used to facilitate the quick disassembly and installation of the fixing mechanism.

[0010] In the above technical solution, further, the positioning component includes:

[0011] Four positioning blocks, which are arranged in pairs symmetrically and are respectively fixedly installed at the bottom of the inner cavity of the housing. The slots formed by the two groups of positioning blocks are adapted to the main body of the blower. The main body of the blower is inserted and matched with the slots formed by the two groups of positioning blocks. A clamping block is fixed in the housing at a position directly above the positioning block. The clamping block is arranged at the upper peripheral side position of the main body of the blower. The four clamping blocks are arranged in pairs symmetrically, and the slots formed by the two groups of clamping blocks are adapted to the main body of the blower. The main body of the blower is inserted and matched with the slots formed by the two groups of clamping blocks. The main body of the blower is inserted and installed in the slot space formed by the two groups of clamping blocks and the two groups of positioning blocks. A first cover is arranged directly above the main body of the blower. An embedding groove adapted to the main body of the blower is opened on the lower surface of the first cover. The first cover is inserted and matched with the main body of the blower through the embedding groove. A buckle is arranged on the lower surface of the first cover at a position corresponding to the clamping block. A clamping hole capable of accommodating the insertion of the buckle is opened on the clamping block. The buckle is clamped and matched with the clamping hole on the corresponding clamping block.

[0012] In the above technical solution, further, the fixing mechanism includes:

[0013] Two fixing arms, which are symmetrically arranged and are respectively located on both sides of the mounting frame. The fixing arms are fixed to the inner cavity wall of the housing. A guiding groove is opened on the side of the fixing arm close to the mounting frame. The mounting frame is slidably installed between the two guiding grooves. A second cover is inserted and installed directly above the two fixing arms and the mounting frame.

[0014] In the above technical solution, further, the quick-release component includes:

[0015] An insertion block, which is fixedly installed on the lower surface of the second cover at a position corresponding to the fixing arm. A jack is opened on the upper surface of the fixing arm at a position corresponding to the insertion block. The insertion block is inserted and matched with the jack. A sliding groove is opened on the inner wall of the jack. A sliding block is slidably installed in the sliding groove. A limiting block is fixed to the side of the sliding block close to the jack. A limiting hole is opened on the insertion block. The limiting block is inserted and matched with the limiting hole. A pull rod is fixed to the side of the sliding block away from the limiting block, and the other end of the pull rod penetrates through the inner wall of the sliding groove and extends to the outside. A spring is sleeved on the part of the pull rod located in the inner cavity of the sliding groove.

[0016] In the above technical solution, further, restraint grooves are symmetrically formed inside the fixed arm and near the sliding groove. A restraint block is slidably installed in the restraint groove, and the restraint block is fixed to the circumferential side wall of the pull rod.

[0017] In the above technical solution, further, an anti-slip head is fixedly installed at one end of the pull rod located outside the housing, and anti-slip lines are provided on the anti-slip head.

[0018] In the above technical solution, further, a protective side plate is fixedly installed by bolts at the opening position near the rear side of the air inlet. Uniformly distributed ventilation holes are formed in the protective side plate.

[0019] The beneficial effects of the present utility model are as follows:

[0020] 1. For the ventilation fan with a quick-release structure, by setting the fixing mechanism and arranging the quick-release component in the fixing mechanism, and using the cooperation of the limiting block and the limiting hole, the second cover can be fixed directly above the two fixed arms and the mounting bracket. By pulling the anti-slip head, the second cover can be quickly disassembled, and the deodorizing block on the mounting bracket can be replaced, solving the disadvantages that the deodorizing block in the traditional device is not convenient to replace and the deodorizing effect decreases after long-term use.

[0021] 2. For the ventilation fan with a quick-release structure, by arranging a dust-proof net at the air inlet position and installing the dust-proof net on the housing through magnetic strips, the air entering the inner cavity of the housing is filtered by the dust-proof net to remove dust, preventing dust in the outside air from entering the room through the housing, greatly increasing the purity of the air after ventilation, and improving the comfort of the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic view of the overall structure of the present utility model (front side view);

[0023] Figure 2 It is a schematic view of the overall structure of the present utility model (rear side view);

[0024] Figure 3 It is a schematic view of the structure of the present utility model when the upper cover is opened;

[0025] Figure 4 It is a schematic view of the distribution of the overall structure in the inner cavity of the housing of the present utility model;

[0026] Figure 5 It is a schematic view of the structure of the fixing mechanism of the present utility model;

[0027] Figure 6 It is a schematic view of the structure of the quick-release component of the present utility model;

[0028] Figure 7This is a schematic structural diagram of the positioning component in the present utility model.

[0029] The markings in the figure are shown as:

[0030] 1. Housing; 2. Upper cover; 3. Air inlet; 4. Air outlet; 5. Fan main body; 6. Mounting bracket; 7. Dust filter; 8. Positioning block; 9. Clamping block; 10. First cover; 11. Embedding groove; 12. Snap; 13. Fixed arm; 14. Guide groove; 15. Second cover; 16. Insert block; 17. Insert hole; 18. Slide groove; 19. Slide block; 20. Limit block; 21. Limit hole; 22. Pull rod; 23. Spring; 24. Constraint groove; 25. Constraint block; 26. Anti-slip head; 27. Protective side plate. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0032] In the description of the present application, it should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments of the present application. For the convenience of description, the dimensions of each part shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant field may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0033] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of the same type and do not limit the number of objects. For example, the first object can be one or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0034] It should be noted that in the description of this application, the orientation or positional relationships indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationships shown in the drawings. This is only for the convenience of describing this application and simplifying the description. Without contrary explanations, these directional terms do not indicate or imply that the devices or elements referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the protection scope of this application; the directional terms "inside, outside" refer to the inside and outside relative to the contours of the respective components.

[0035] It should be noted that in this application, the term "comprising", "including" or any other variants thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such a process, method, article or device. Without further limitations, the element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of this application is not limited to performing functions in the order shown or discussed. It may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0036] Embodiment 1:

[0037] Please refer to Figure 1 - Figure 7 As shown, this embodiment provides an exhaust fan with a quick-release structure, including:

[0038] A housing 1, the housing 1 has a structure with an open top and a hollow interior. The upper surface opening of the housing 1 is fixed with an upper cover 2 by bolts. An air inlet 3 is provided at the rear side of the housing 1, and air outlets 4 are symmetrically arranged at the front side of the housing 1. A fan main body 5 is installed inside the housing 1. An installation frame 6 is provided at the front side of the fan main body 5 and near the two air outlets 4. An odor removal block is arranged inside the installation frame 6. A dust-proof net 7 is installed at the rear side of the fan main body 5 and inside the air inlet 3. A magnetic strip is pasted on the side of the dust-proof net 7, and the dust-proof net 7 is magnetically connected to the housing 1 through the magnetic strip;

[0039] A positioning component, which is arranged on the periphery of the fan main body 5 and is used for positioning and fixing the fan main body 5;

[0040] A fixing mechanism is arranged in the inner cavity of the housing 1 and around the mounting bracket 6, and is used to fix the mounting bracket 6;

[0041] Two quick-release components are symmetrically arranged and both are arranged in the fixing mechanism, and are used to facilitate the quick disassembly and installation of the fixing mechanism;

[0042] In this embodiment, the positioning component includes:

[0043] Four positioning blocks 8 are arranged in pairs symmetrically and are respectively fixedly installed at the bottom of the inner cavity of the housing 1. The slots formed by the two groups of positioning blocks 8 are adapted to the main body 5 of the blower. The main body 5 of the blower is inserted and matched with the slots formed by the two groups of positioning blocks 8. A clamping block 9 is fixed in the housing 1 and directly above the positioning block 8. The clamping block 9 is arranged at the upper peripheral side position of the main body 5 of the blower. The four clamping blocks 9 are arranged in pairs symmetrically, and the slots formed by the two groups of clamping blocks 9 are adapted to the main body 5 of the blower. The main body 5 of the blower is inserted and matched with the slots formed by the two groups of clamping blocks 9. The main body 5 of the blower is inserted and installed in the slot space formed by the two groups of clamping blocks 9 and the two groups of positioning blocks 8. A first cover 10 is arranged directly above the main body 5 of the blower. An embedding groove 11 adapted to the main body 5 of the blower is formed on the lower surface of the first cover 10. The first cover 10 is inserted and matched with the main body 5 of the blower through the embedding groove 11. A buckle 12 is arranged on the lower surface of the first cover 10 and at a position corresponding to the clamping block 9. A clamping hole capable of accommodating the insertion of the buckle 12 is formed on the clamping block 9. The buckle 12 is clamped and matched with the clamping hole on the corresponding clamping block 9;

[0044] In this embodiment, the fixing mechanism includes:

[0045] Two fixing arms 13 are symmetrically arranged and are respectively located on both sides of the mounting bracket 6. The fixing arms 13 are fixed to the inner cavity wall of the housing 1. A guiding groove 14 is formed on the side of the fixing arm 13 close to the mounting bracket 6. The mounting bracket 6 is slidably installed between the two guiding grooves 14. A second cover 15 is inserted and installed directly above the two fixing arms 13 and the mounting bracket 6;

[0046] In this embodiment, the quick-release component includes:

[0047] The insert block 16 is fixedly installed on the lower surface of the second cover 15 and at a position corresponding to the fixed arm 13. At a position on the upper surface of the fixed arm 13 corresponding to the insert block 16, a jack 17 is provided. The insert block 16 is inserted and matched with the jack 17. A chute 18 is provided on the inner wall of the jack 17. A slider 19 is slidably installed in the chute 18. A limiting block 20 is fixed on one side of the slider 19 close to the jack 17. A limiting hole 21 is provided on the insert block 16. The limiting block 20 is inserted and matched with the limiting hole 21. A pull rod 22 is fixed on the side of the slider 19 away from the limiting block 20, and the other end of the pull rod 22 penetrates through the inner wall of the chute 18 and extends to the outside. A spring 23 is sleeved on the part of the pull rod 22 located in the inner cavity of the chute 18.

[0048] Among them, the working principle of this device is as follows:

[0049] When maintenance and internal part replacement of this device are required, just use a screwdriver to unscrew the bolts fixing the upper cover 2 and remove the upper cover 2. At this time, multiple parts in the inner cavity of the housing 1 are in an exposed state;

[0050] When maintaining the fan main body 5, the operator presses against the buckle 12 with one hand and pushes it inward, while slightly pulling up the first cover 10 on this side with the other hand. At this time, the buckle 12 contracts into the card hole on the clamping block 9. Deal with the two buckles 12 on the other side in the same way. Then lift up the first cover 10, and the first cover 10 can be removed from above the fan main body 5. Then pull up the fan main body 5, and the fan main body 5 can be pulled out from the slot formed by multiple positioning blocks 8 and multiple clamping blocks 9. After the fan main body 5 is repaired, reset the fan main body 5 with good functions, then align the embedding groove 11 on the first cover 10 with the upper end of the fan main body 5 and align the multiple buckles 12 with the corresponding card holes respectively. Then press down the first cover 10. After the first cover 10 is completely in place, a "click" sound will be heard. At this time, the buckle 12 is engaged with the clamping block 9 again, thus realizing the fixation of the fan main body 5. It should be noted that the buckle 12 has a certain elasticity and resilience and can deform under the action of external force. In this application, the material of the buckle 12 is polyurethane material, which has strong durability and relatively excellent elasticity;

[0051] When maintaining the mounting bracket 6, the operator pulls the anti-slip head 26 of the two quick-release components. At this time, the anti-slip head 26 drives the pull rod 22 to displace outward. The pull rod 22 drives the slider 19 to slide inside the inner cavity of the chute 18, and pulls the limit block 20 into the chute 18. Under the extrusion of the slider 19, the spring 23 is in a compressed state. At this time, the limit block 20 and the limit hole 21 no longer form a clamping limit. Then the operator pulls the second cover 15 upward, and the insertion block 16 can be pulled out of the insertion hole 17. When the second cover 15 is separated, there is no longer a constraint above the mounting bracket 6, and the mounting bracket 6 can be pulled out from the slot formed by the two guiding grooves 14, and the deodorizing block inside the mounting bracket 6 can be replaced. It should be noted that the deodorizing block can be activated carbon, and the Chinese patent with the publication number CN210889405U has described it. This is the prior art and should be well-known to those skilled in the art. This application will not elaborate on it. After replacing the deodorizing block, the mounting bracket 6 is reset, and the insertion block 16 on the second cover 15 is aligned with the corresponding insertion hole 17. Then the second cover 15 is pressed downward. At this time, the bottom end of the insertion block 16 presses the inclined surface of the limit block 20. Under the action of the bottom end of the insertion block 16, the limit block 20 retracts into the chute 18 until the insertion block 16 is completely in place. At this time, the limit block 20 is reset under the elastic action of the spring 23 and inserts into the limit hole 21 to constrain the insertion block 16. At this time, the mounting bracket 6 is firmly fixed inside the housing 1 under the action of the second cover 15 and the two fixing arms 13;

[0052] When maintaining the dust-proof net 7, there are two solutions: First, after opening the upper cover 2, the dust-proof net 7 can be directly removed from the top opening of the housing 1. Since the dust-proof net 7 is magnetically connected to the housing 1 through a magnetic strip, when subjected to a large external force, the magnetic force obtained by the dust-proof net 7 through the magnetic strip can no longer fix the dust-proof net 7. At this time, the operator can easily remove and clean the dust-proof net 7; Second, without opening the upper cover 2, the dust-proof net 7 can be removed from the rear opening of the air inlet 3 by unscrewing the bolts fixing the protective side plate 27. After cleaning the dust-proof net 7 in both solutions, the dust-proof net 7 needs to be reset, and the upper cover 2 or the protective side plate 27 needs to be reinstalled respectively.

[0053] Embodiment 2:

[0054] This embodiment provides a ventilation fan with a quick-release structure. In addition to including the technical solutions of the above embodiment, it also has the following technical features. Constraint grooves 24 are symmetrically opened inside the fixing arm 13 and near the chute 18. A constraint block 25 is slidably installed in the constraint groove 24, and the constraint block 25 is fixed to the circumferential side wall of the pull rod 22.

[0055] Among them, when the pull rod 22 is pulled outward, the constraint block 25 can slide outward along the constraint groove 24 following the pull rod 22.

[0056] By setting the constraint slot 24 and the constraint block 25, when the pull rod 22 is displaced, it will not rotate, preventing the limit block 20 from rotating and improving the structural stability of the device.

[0057] Embodiment 3:

[0058] This embodiment provides a ventilation fan with a quick-release structure. In addition to including the technical solutions of the above embodiments, it also has the following technical features. A non-slip head 26 is fixedly installed at one end of the pull rod 22 located outside. Anti-slip patterns are provided on the non-slip head 26.

[0059] Among them, by setting the non-slip head 26, it is convenient for the operator to pull the pull rod 22, greatly facilitating the operator to exert force on the device and perform disassembly and connection.

[0060] Embodiment 4:

[0061] This embodiment provides a ventilation fan with a quick-release structure. In addition to including the technical solutions of the above embodiments, it also has the following technical features. A protective side plate 27 is fixedly installed by bolts at the opening position near the rear side of the air inlet 3. Uniformly distributed ventilation holes are provided on the protective side plate 27.

[0062] Among them, by setting the protective side plate 27, it plays a good protective role for multiple components inside the housing 1.

[0063] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all belong to the protection scope of the present application.

Claims

1. A ventilation fan with a quick-release structure, characterized in that Including: A housing (1), the housing (1) has a top-opening and internally hollow structure. An upper cover (2) is fixed to the opening on the upper surface of the housing (1) by bolts. An air inlet (3) is provided at the rear side of the housing (1), and air outlets (4) are symmetrically arranged at the front side of the housing (1). A fan main body (5) is installed inside the housing (1). An installation frame (6) is arranged at the front side of the fan main body (5) and near the two air outlets (4). An odor removal block is arranged inside the installation frame (6). A dust-proof net (7) is installed at the rear side of the fan main body (5) and inside the air inlet (3). A magnetic strip is pasted on the side of the dust-proof net (7), and the dust-proof net (7) is magnetically connected to the housing (1) through the magnetic strip; A positioning component, the positioning component is arranged on the periphery of the fan main body (5) and is used for positioning and fixing the fan main body (5); A fixing mechanism, the fixing mechanism is arranged inside the housing (1) and around the installation frame (6) and is used for fixing the installation frame (6); Two groups of quick-release components, the two groups of quick-release components are symmetrically arranged and are both arranged inside the fixing mechanism and are used for facilitating the quick disassembly and installation of the fixing mechanism.

2. The ventilation fan with a quick-release structure according to claim 1, wherein The positioning component includes: Four positioning blocks (8), the four positioning blocks (8) are arranged in pairs symmetrically and are respectively fixedly installed at the bottom of the inner cavity of the housing (1). The slots formed by the two groups of positioning blocks (8) are adapted to the fan main body (5). The fan main body (5) is inserted and matched with the slots formed by the two groups of positioning blocks (8). A clamping block (9) is fixed at the position directly above the positioning block (8) inside the housing (1). The clamping block (9) is arranged at the upper peripheral side position of the fan main body (5). The four clamping blocks (9) are arranged in pairs symmetrically, and the slots formed by the two groups of clamping blocks (9) are adapted to the fan main body (5). The fan main body (5) is inserted and matched with the slots formed by the two groups of clamping blocks (9). The fan main body (5) is inserted and installed in the slot space formed by the two groups of clamping blocks (9) and the two groups of positioning blocks (8). A first cover (10) is arranged directly above the fan main body (5). An embedding groove (11) adapted to the fan main body (5) is opened on the lower surface of the first cover (10). The first cover (10) is inserted and matched with the fan main body (5) through the embedding groove (11). A buckle (12) is arranged at the position corresponding to the clamping block (9) on the lower surface of the first cover (10). A clamping hole for accommodating the insertion of the buckle (12) is opened on the clamping block (9). The buckle (12) is clamped and matched with the clamping hole on the corresponding clamping block (9).

3. The ventilation fan with a quick-release structure according to claim 1, characterized in that, The fixing mechanism includes: Two fixed arms (13), the two fixed arms (13) are symmetrically arranged and located on both sides of the mounting bracket (6) respectively. The fixed arms (13) are fixed to the inner cavity wall of the housing (1). A guiding groove (14) is formed on the side of the fixed arm (13) close to the mounting bracket (6). The mounting bracket (6) is slidably mounted between the two guiding grooves (14). A second cover (15) is inserted and mounted directly above the two fixed arms (13) and the mounting bracket (6).

4. The ventilation fan with a quick-release structure according to claim 3, characterized in that, The quick-release assembly includes: A plug (16), the plug (16) is fixedly mounted on the lower surface of the second cover (15) and at a position corresponding to the fixed arm (13). A jack (17) is formed on the upper surface of the fixed arm (13) and at a position corresponding to the plug (16). The plug (16) is in plug-in fit with the jack (17). A sliding groove (18) is formed on the inner wall of the jack (17). A slider (19) is slidably mounted in the sliding groove (18). A limiting block (20) is fixed to the side of the slider (19) close to the jack (17). A limiting hole (21) is formed on the plug (16). The limiting block (20) is in plug-in fit with the limiting hole (21). A pull rod (22) is fixed to the side of the slider (19) away from the limiting block (20), and the other end of the pull rod (22) penetrates through the inner wall of the sliding groove (18) and extends to the outside. A spring (23) is sleeved on the part of the pull rod (22) located in the inner cavity of the sliding groove (18).

5. The ventilation fan with a quick-release structure according to claim 4, characterized in that, Constraint grooves (24) are symmetrically formed in the fixed arm (13) and close to the sliding groove (18). A constraint block (25) is slidably mounted in the constraint groove (24), and the constraint block (25) is fixed to the circumferential side wall of the pull rod (22).

6. The ventilation fan with a quick-release structure according to claim 4, wherein, An anti-slip head (26) is fixedly mounted at the end of the pull rod (22) located outside. Anti-slip lines are provided on the anti-slip head (26).

7. The ventilation fan with a quick-release structure according to claim 1, characterized in that, A protective side plate (27) is fixedly mounted by bolts at the opening position on the rear side of the air inlet (3). Ventilation holes are formed on the protective side plate (27) and are evenly distributed.

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