Axial flow fan mounting structure convenient to maintain and air cooler

Abstract

The utility model relates to a kind of axial flow fan mounting structure and air cooler convenient to maintain, the front side of box is equipped with door panel mounting port, hinged door panel is equipped on first mounting panel, locking assembly is connected between second mounting panel and door panel, the locking assembly is configured to be able to lock or unlock door panel and second mounting panel;Axial flow fan includes fan shell, and fan fan blade and motor installed on fan shell and inside box;Round mounting hole is opened on door panel, fan shell is adaptively fixed on round mounting hole;When door panel and second mounting panel are unlocked, door panel can rotate outward around the hinged end of first mounting panel under external force, axial flow fan and door panel are turned out to be outside box.The above scheme, user turns out door panel by the form of opening door, so that fan fan blade and motor in the back side of door panel are exposed, to realize the maintenance operation of tool-free, disassembly and assembly fast and no component loss.

Description

Technical Field

[0001] This utility model relates to the field of air cooler technology, and in particular to an axial flow fan installation structure and air cooler that are easy to maintain. Background Technology

[0002] The axial fan in industrial and agricultural evaporative air coolers is the core air delivery component. After long-term operation, it requires disassembly and maintenance to clean dust from the fan blades and inspect the motor. Currently, evaporative air coolers have a fixed casing structure, and the connection between the axial fan and the casing panel is generally secured with bolts. This presents the following key problems:

[0003] ① Low disassembly efficiency: Tools such as wrenches and sockets are required to unscrew 3-6 fixing bolts one by one, and the disassembly of a single fan usually takes more than 30 minutes; the bolts of large air coolers are easily affected by dust and moisture and corrode, which further increases the difficulty of disassembly, and may even require violent disassembly.

[0004] ② High dependence on tools: Tools that are perfectly compatible with the bolt specifications must be carried. If the tools are missing or do not meet the specifications, the maintenance work will be interrupted directly, and it will be impossible to handle the fan failure in an emergency.

[0005] ③ High component wear: Repeated disassembly and assembly can easily lead to stripped bolts and wear of housing bolt holes. After long-term use, the air cooler housing or fan flange needs to be replaced, significantly increasing maintenance costs. When operated by non-professionals, uneven bolt tightening may also cause secondary problems such as abnormal noise and vibration during fan operation.

[0006] ④ High operational threshold: It requires mastering bolt disassembly and assembly techniques and force control methods, which is difficult for ordinary workers to complete independently. It requires the reliance on professional maintenance personnel, which increases labor costs.

[0007] Therefore, there is an urgent need for a tool-free, quick-assembly and disassembly structure for axial flow fans that does not require component damage. Summary of the Invention

[0008] To address the aforementioned problems, the first objective of this utility model is to provide an easily maintainable axial flow fan installation structure. This structure involves mounting the axial flow fan on a door panel, using hinges to allow the door panel to be flipped open and closed, and using a locking component to quickly lock / unlock, replacing traditional bolt fixing. This allows for tool-free assembly and disassembly of the axial flow fan within 3 minutes, reducing maintenance difficulty and component wear. It is suitable for independent operation by ordinary workers, solving the problems of inefficiency, high wear, and high barrier to entry associated with traditional bolt fixing methods. The second objective of this utility model is to provide a cooler with the aforementioned easily maintainable axial flow fan installation structure.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] An easy-to-maintain axial flow fan installation structure includes a housing and an axial flow fan disposed within the housing, wherein an area for airflow is formed within the housing; characterized in that:

[0011] The front side of the housing is provided with a door panel mounting opening. On both sides of the door panel mounting opening, a first mounting panel and a second mounting panel are provided on the housing. A door panel is hinged to the first mounting panel to adapt and cover the door panel mounting opening. A locking component is provided between the second mounting panel and the door panel. The locking component is configured to lock or unlock the door panel and the second mounting panel.

[0012] The axial flow fan includes a fan housing, and fan blades and a motor mounted on the fan housing and located inside the housing; a circular mounting hole is provided on the door panel, and the fan housing is adapted and fixedly installed in the circular mounting hole; when the door panel and the second mounting panel are locked, the axial flow fan is fixed on the housing; when the door panel and the second mounting panel are unlocked, the door panel can rotate outward around the hinge end with the first mounting panel under the action of external force, and the axial flow fan and the door panel are flipped out to the outside of the housing.

[0013] In the above technical solution, a door panel mounting opening is made on the air cooler housing. A door panel is hinged to the door panel mounting opening, and a circular mounting hole is made on the door panel. The fan housing (fan flange or fan cover) of the axial flow fan is adapted and fixedly installed in the circular mounting hole. The fan blades and motor are installed on the fan housing and located inside the housing. The locking component uses a rotary latch to unlock or lock the door panel and the housing. When the axial flow fan is running, the door panel and the housing are locked. When the axial flow fan needs maintenance, the door panel and the housing are unlocked. The user can open the door panel to expose the fan blades and motor located on the back of the door panel. Thus, the work of cleaning the dust on the fan blades and inspecting the motor can be carried out without removing the axial flow fan from the door panel, thereby realizing maintenance work without tools, quick disassembly and assembly, and no component damage.

[0014] Preferably, the first mounting panel and the door panel are hinged together by a hinge assembly, which includes a fixed hinge leaf and a movable hinge leaf that can rotate relative to the fixed hinge leaf via a hinge shaft. The first mounting panel is provided with a first hinge mounting groove, and the fixed hinge leaf is fixedly installed in the first hinge mounting groove. The door panel is provided with a second hinge mounting groove, and the movable hinge leaf is adapted to and fixedly installed in the second hinge mounting groove.

[0015] Preferably, the first mounting panel is hinged to the door panel by at least two hinge assemblies.

[0016] Preferably, the locking assembly includes a rotary latch mounted on the door panel and a lock slot mounted on the back of the second mounting panel;

[0017] The door panel has an assembly hole. The rotary latch includes a lock cylinder housing, a lock cylinder, a rotary handle, and a bolt. The lock cylinder is fitted through the assembly hole. The outer edge of the lock cylinder is formed with a retaining edge. The lock cylinder housing is fixedly fitted onto the outside of the lock cylinder. The outer edge of the lock cylinder housing is formed with a baffle. An annular groove is formed between the baffle and the retaining edge to fit into the edge of the assembly hole. The outer end of the lock cylinder has the rotary handle protruding outward. The inner side of the lock cylinder has the bolt. The lock groove seat is square-ring shaped. When the door panel and the second mounting panel are locked, the bolt engages with the inner wall of the lock groove seat for limitation. The rotation angle of the bolt is 90°.

[0018] Preferably, at least two sets of locking components are provided between the door panel and the second mounting panel.

[0019] Preferably, the protrusion height of the rotary handle relative to the door panel surface is ≤5mm.

[0020] Preferably, the rotary handle is cross-shaped or straight-line shaped.

[0021] Preferably, the length of the locking tongue is 10~15mm.

[0022] Preferably, the fan casing is fixedly connected to the door panel by four bolts.

[0023] A type of evaporative air cooler, characterized in that it includes an axial flow fan mounting structure that is easy to maintain, as described in any one of the above-mentioned methods.

[0024] The present invention adopts the above technical solution and has the following technical effects:

[0025] This solution involves creating a door panel mounting opening on the evaporative air cooler housing. A door panel is hinged to this opening, and a circular mounting hole is drilled in the door panel. The axial flow fan housing (fan flange or fan cover) is fitted and fixed into the circular mounting hole. The fan blades and motor are mounted on the fan housing and located inside the housing. A rotating lock is used to unlock and lock the door panel and housing. When the axial flow fan is running, the door panel and housing are locked. When the axial flow fan requires maintenance, the door panel and housing are unlocked. The user can open the door to expose the fan blades and motor located on the back of the door panel. This allows for cleaning the fan blades and inspecting the motor without removing the axial flow fan from the door panel, thus achieving tool-free, quick disassembly and assembly, and maintenance without component damage. Specifically:

[0026] ① Tool-free quick disassembly and assembly: The rotating latch enables 90° rotation for unlocking / locking without any tools; the hinge assembly supports 180° rotation, and a single person can complete the opening and closing of the door panel where the axial fan is located and the maintenance of the axial fan within 3 minutes, which is more than 90% more efficient than the traditional bolt method and solves the problem of lack of tools during emergency maintenance;

[0027] ② No component wear: Avoids the problems of stripped threads and worn screw holes caused by repeated disassembly and assembly of bolts. The rotary lock and hinge are mechanically wear-resistant structures with a service life of more than 1,000 disassembly and assembly cycles, reducing the need to replace the air cooler casing and fan components, and reducing maintenance costs by 60%;

[0028] ③ High installation stability: The contact area between the locking tongue and the locking groove seat of the rotary lock is ≥20mm², and the load-bearing capacity of a single lock is not less than 80N. With the support of 2 sets of hinges, there is no vibration or abnormal noise when the fan is running.

[0029] ④ Strong adaptability: The mounting panels on both sides of the door panel where the axial flow fan is located can be customized according to the outer diameter of different axial flow fans. The hinges and concealed locks are of uniform specifications and are compatible with mainstream industrial and agricultural evaporative air coolers and axial flow fans with diameters of 200-800mm.

[0030] ⑤ Low operating threshold: Only four simple steps are required: "rotate to unlock - flip the door panel - maintain the fan - reset and lock". Ordinary staff can operate independently after 1 minute of guidance, without relying on professional maintenance personnel, thus reducing labor costs. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the front structure of the air cooler.

[0032] Figure 2 This is an installation diagram of the door panel mounting opening.

[0033] Figure 3 This is a schematic diagram of the assembly of the axial flow fan and the door panel.

[0034] Figure 4 This is a structural diagram of a hinge assembly.

[0035] Figure 5 This is a schematic diagram showing the arrangement of the circular mounting holes on the door panel.

[0036] Figure 6 for Figure 5 A schematic diagram of the back structure.

[0037] Figure 7 This is a schematic diagram showing the arrangement of the hinge and locking components on the housing.

[0038] Figure 8 This is a schematic diagram showing the fit between the rotary latch and the lock slot seat.

[0039] Figure 9 This is a three-dimensional structural diagram of a rotary lock. Detailed Implementation

[0040] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0041] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0043] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] like Figures 1-9 The axial flow fan installation structure shown includes a housing 1 and an axial flow fan 2 disposed inside the housing 1, wherein an area for airflow is formed inside the housing 1.

[0046] The front side of the housing 1 is provided with a door panel mounting opening 3. On both sides of the door panel mounting opening 3, a first mounting panel 4 and a second mounting panel 5 are provided on the housing 1. A door panel 6 is hinged to the first mounting panel 4 to adapt and cover the door panel mounting opening 3. A locking component is provided between the second mounting panel 5 and the door panel 6. The locking component is configured to lock or unlock the door panel 6 and the second mounting panel 5.

[0047] The axial flow fan 2 includes a fan housing 7, and fan blades and a motor installed on the fan housing 7 and located inside the housing 1; the door panel 6 has a circular mounting hole 8, and the fan housing 7 is adapted and fixedly installed in the circular mounting hole 8; when the door panel 6 and the second mounting panel 5 are locked, the axial flow fan 2 is fixed on the housing 1; when the door panel 6 and the second mounting panel 5 are unlocked, the door panel 6 can rotate outward around the hinge end with the first mounting panel 4 under the action of external force, and the axial flow fan 2 and the door panel 6 are flipped out to the outside of the housing 1.

[0048] In the above technical solution, a door panel mounting opening is made on the air cooler housing. A door panel is hinged to the door panel mounting opening, and a circular mounting hole is made on the door panel. The fan housing (fan flange or fan cover) of the axial flow fan is adapted and fixedly installed in the circular mounting hole. The fan blades and motor are installed on the fan housing and located inside the housing. A locking component is used to unlock or lock the door panel and the housing. When the axial flow fan is running, the door panel and the housing are locked. When the axial flow fan needs maintenance, the door panel and the housing are unlocked. The user can open the door panel to expose the fan blades and motor located on the back of the door panel. Thus, the work of cleaning the dust on the fan blades and inspecting the motor can be carried out without removing the axial flow fan from the door panel, thereby realizing maintenance work without tools, quick disassembly and assembly, and no component damage.

[0049] The door panel is a rectangular metal plate, made of stainless steel sheet by stamping, with dimensions of 610mm × 610mm.

[0050] Furthermore, the first mounting panel 4 and the door panel 6 are hinged together by a hinge assembly 9. This hinge assembly 9 includes a fixed hinge leaf 10 and a movable hinge leaf 12 that can rotate relative to the fixed hinge leaf 10 via a hinge shaft 11. The first mounting panel 4 has a first hinge mounting groove 13, on which the fixed hinge leaf 10 is fixedly mounted. The door panel 6 has a second hinge mounting groove 14, on which the movable hinge leaf 12 is adapted and fixedly mounted. In this technical solution, by specifically defining the structure of the hinge assembly (including the fixed hinge leaf, the movable hinge leaf, and the hinge shaft), the hinge connection between the door panel and the first mounting panel is ensured to be stable and reliable. The design of the hinge mounting groove improves the integration and installation accuracy of the assembly, making the door panel rotate more smoothly, reducing wear during long-term use, and extending its service life.

[0051] The first and second mounting panels are made of stainless steel sheet by stamping and are fixed to the air cooler housing with bolts. The dimensions of the door panel mounting opening are 615*615mm. The first and second hinge mounting slots are grooves with a depth of 6mm.

[0052] Furthermore, the first mounting panel 4 and the door panel 6 are hinged together by at least two hinged assembly 9. This technical solution, employing at least two hinged assembly assemblies, further enhances the support strength and stability of the door panel, preventing swaying or displacement of the fan during operation or rotation. The multiple hinges distribute the force evenly, improving the structural durability and making it suitable for axial flow fans of different sizes and weights.

[0053] The hinge assembly uses two sets of 30mm×50mm stainless steel hinges. The fixed hinge is fixed to the first hinge mounting slot by rivets, and the movable hinge is fixed to the second hinge mounting slot by rivets. The hinge shaft diameter is 5mm, the flipping resistance is 1.5N, and it can achieve 180° flipping without jamming.

[0054] Furthermore, the locking assembly includes a rotary latch 15 mounted on the door panel 6 and a lock slot seat 16 mounted on the back of the second mounting panel 5;

[0055] The door panel 6 has an assembly hole. The rotary latch 15 includes a lock cylinder housing 17, a lock cylinder 18, a rotary handle 19, and a latch 20. The lock cylinder 18 is fitted through the assembly hole. The outer edge of the lock cylinder 18 is formed with a retaining edge 21. The lock cylinder housing 17 is fixedly fitted on the outside of the lock cylinder 18. The outer edge of the lock cylinder housing 17 is formed with a baffle 22. An annular groove 23 is formed between the baffle 22 and the retaining edge 21 to fit into the edge of the assembly hole. The outer end of the lock cylinder 18 has the rotary handle 19 protruding outward. The inner side of the lock cylinder 18 has the latch 20. The lock groove seat 16 is square annular. When the door panel 6 and the second mounting panel 5 are locked, the latch 20 cooperates with the inner wall of the lock groove seat 16 for limiting. The rotation angle of the latch 20 is 90°.

[0056] In the above technical solution, the rotary latch and lock slot seat work together to lock or unlock with a simple 90° rotation, making operation quick and easy without tools. The contact area between the latch and lock slot seat of the rotary latch is ≥20mm², and a single latch can bear a load of no less than 80N. With the support of two hinges, there is no vibration or abnormal noise when the fan is running. The lock cylinder is embedded in the mounting hole of the axial flow fan door panel. It has a rotating handle on the outside and an eccentric latch on the inside. The latch, lock cylinder housing, and lock slot seat are all made of stainless steel. The lock slot seat is fixed to the back of the second mounting panel. Rotating the rotating handle on the lock cylinder 90° clockwise turns the latch to the lock slot seat, where they meet in a cross shape to lock. Rotating it 90° counterclockwise disengages the latch from the lock slot seat and makes it parallel to the latch, thus unlocking. The operation is convenient and the locking is secure.

[0057] Furthermore, at least two sets of locking components are provided between the door panel 6 and the second mounting panel 5. This technical solution, by providing at least two sets of locking components, further improves the locking strength and stability between the door panel and the second mounting panel. The even distribution of multiple sets of latches avoids the loosening problems that may occur with single-point locking, making it suitable for large or high-power axial flow fans and ensuring stability even at high speeds.

[0058] Furthermore, the protrusion height of the rotary handle 19 relative to the surface of the door panel 6 is ≤5mm. In this technical solution, the height of the rotary handle does not exceed 5mm from the door panel surface, avoiding accidental activation and improving equipment safety. Simultaneously, the low-profile design prevents the handle from protruding from the door panel surface, avoiding accidental unlocking during transportation or operation, while maintaining a clean appearance.

[0059] Furthermore, the rotary handle 19 is either cross-shaped or straight-shaped. In this technical solution, the rotary handle adopts a cross-shaped or straight-shaped design, providing a more ergonomic operating method to suit the habits of different users. This handle shape facilitates the application of force and allows for easy rotation even in humid or dusty environments, improving the convenience and reliability of operation.

[0060] Furthermore, the length of the locking tongue 20 is 10-15mm. This technical solution optimizes the mating depth between the locking tongue and the lock slot, ensuring both locking stability (contact area ≥ 20mm²) and ease of unlocking. This length range has been experimentally verified to maintain good performance after multiple disassemblies and reassemblies, reducing wear.

[0061] Furthermore, the fan housing 7 is fixedly connected to the door panel 6 by four bolts. In this technical solution, the axial flow fan is fixed in the mounting hole by four M8 hex bolts (fixed only during the initial installation, and no disassembly is required for subsequent maintenance), forming an integrated "door panel-fan" structure. This reduces the problems of stripped bolt threads and worn bolt holes caused by repeated disassembly and assembly, lowers maintenance costs, and ensures the stability of the integrated structure of the fan and door panel.

[0062] This application also discloses an air cooler having the aforementioned easy-to-maintain axial flow fan mounting structure.

[0063] The steps for this application are as follows:

[0064] I. Disassembly process:

[0065] 1. Facing the door panel;

[0066] 2. Pinch the handle of the rotary lock with your fingers and rotate it 90° counterclockwise. The latch inside the lock will disengage from the lock slot, thus unlocking the lock.

[0067] 3. Under the action of external force, the door panel flips outward around the hinge axis of the hinge assembly (the flipping angle can be adjusted to 90°-180° according to maintenance needs). The axial flow fan flips synchronously with the door panel, exposing the fan blades and motor, which can then be used for dust cleaning or motor maintenance.

[0068] II. Installation process:

[0069] 1. Rotate the door panel around the hinge axis toward the second mounting panel until the door panel surface is flush with the surfaces of the first and second mounting panels;

[0070] 2. Pinch the rotating handle of the rotary lock and rotate it 90° clockwise. The latch inside the lock will turn to abut against the back of the lock slot, thus locking the lock.

[0071] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0072] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. An easy-to-maintain axial flow fan installation structure, comprising a housing (1) and an axial flow fan (2) disposed within the housing (1), wherein the housing (1) forms an area for airflow passage; characterized in that: The front side of the housing (1) is provided with a door panel mounting opening (3). On both sides of the door panel mounting opening (3), a first mounting panel (4) and a second mounting panel (5) are provided on the housing (1). A door panel (6) is hinged to the first mounting panel (4) to cover the door panel mounting opening (3). A locking component is provided between the second mounting panel (5) and the door panel (6). The locking component is configured to lock or unlock the door panel (6) and the second mounting panel (5). The axial flow fan (2) includes a fan housing (7), and a fan blade and a motor installed on the fan housing (7) and located inside the housing (1); the door panel (6) has a circular mounting hole (8), and the fan housing (7) is adapted and fixedly installed on the circular mounting hole (8); when the door panel (6) and the second mounting panel (5) are locked, the axial flow fan (2) is fixed on the housing (1); when the door panel (6) and the second mounting panel (5) are unlocked, the door panel (6) can rotate outward around the hinge end with the first mounting panel (4) under the action of external force, and the axial flow fan (2) and the door panel (6) are flipped out to the outside of the housing (1).

2. The axial flow fan installation structure for easy maintenance according to claim 1, characterized in that: The first mounting panel (4) and the door panel (6) are hinged together by a hinge assembly (9). The hinge assembly (9) includes a fixed hinge leaf (10) and a movable hinge leaf (12) that can rotate relative to the fixed hinge leaf (10) via a hinge shaft (11). The first mounting panel (4) is provided with a first hinge mounting groove (13), and the fixed hinge leaf (10) is fixedly installed in the first hinge mounting groove (13). The door panel (6) is provided with a second hinge mounting groove (14), and the movable hinge leaf (12) is adapted to be fixedly installed in the second hinge mounting groove (14).

3. The axial flow fan installation structure for easy maintenance according to claim 2, characterized in that: The first mounting panel (4) is hinged to the door panel (6) by at least two hinge assemblies (9).

4. The axial flow fan installation structure for easy maintenance according to claim 1, characterized in that: The locking assembly includes a rotary latch (15) mounted on the door panel (6) and a lock slot seat (16) mounted on the back of the second mounting panel (5). The door panel (6) has an assembly hole. The rotary latch (15) includes a lock cylinder shell (17), a lock cylinder (18), a rotary handle (19), and a latch (20). The lock cylinder (18) is fitted into the assembly hole. The outer edge of the lock cylinder (18) is formed with a retaining edge (21). The lock cylinder shell (17) is fixedly fitted onto the outside of the lock cylinder (18). The outer edge of the lock cylinder shell (17) is formed with a baffle (22). The baffle (22) and the retaining edge are connected. (21) A ring groove (23) is formed between them to fit and be fitted into the edge of the mounting hole; the outer end of the lock cylinder (18) is provided with the rotating handle (19) protruding outward; the inner side of the lock cylinder (18) is provided with the lock tongue (20), the lock groove seat (16) is square ring-shaped, when the door panel (6) and the second mounting panel (5) are locked, the lock tongue (20) cooperates with the inner wall of the lock groove seat (16) to limit the movement, and the rotation angle of the lock tongue (20) is 90°.

5. The axial flow fan installation structure for easy maintenance according to claim 4, characterized in that: At least two sets of locking components are provided between the door panel (6) and the second mounting panel (5).

6. The axial flow fan installation structure for easy maintenance according to claim 4, characterized in that: The protrusion height of the rotating handle (19) relative to the surface of the door panel (6) is ≤5mm.

7. The axial flow fan installation structure for easy maintenance according to claim 6, characterized in that: The rotating handle (19) is cross-shaped or straight.

8. The axial flow fan installation structure for easy maintenance according to claim 4, characterized in that: The length of the latch (20) is 10~15mm.

9. The axial flow fan installation structure for easy maintenance according to claim 1, characterized in that: The fan casing (7) is fixedly connected to the door panel (6) by four bolts.

10. A type of air cooler, characterized in that: The axial flow fan installation structure, as described in any one of claims 1 to 9, is easy to maintain.

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