Fan head supporting frame and combined floor fan

Abstract

According to the fan head supporting frames and the combined floor fan, the supporting frames are installed on the two sides of a fan head respectively and used for supporting the fan head, and each supporting frame comprises an inverted-V-shaped supporting leg, a connecting rod, an adjusting and installing assembly and an assembling assembly; the connecting rod is horizontally arranged, and the two ends of the connecting rod are connected with the supporting feet on the two sides of the inverted-V-shaped supporting foot respectively. The adjusting and installing assembly is rotatably installed on the connecting rod, an installing hole is formed in the adjusting and installing assembly, and the assembling assembly penetrates through the installing hole from one side of the connecting rod to be connected with the fan head on the other side of the connecting rod. By introducing the design of the inverted-V-shaped supporting legs and the connecting rods, the fan can be flexibly supported, and meanwhile occupied ground space is reduced. The inverted-V-shaped supporting legs are stable and reliable in structure, small in occupied space and convenient to adjust and store, and due to the design, the fan can be stored more compactly when not used, and space waste is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan technical field especially relates to a fan head support frame and combined ground lying fan. BACKGROUND

[0002] The ground lying fan is placed on the ground in a prone position, mainly used for cooling and circulating air, and is widely used in family, factory, restaurant, school, office and other places, and the main features are fast wind speed, strong wind power, convenient operation and flexible space occupation.

[0003] The ordinary ground lying fan on the market has single structure, is complex to disassemble, has large space occupation and poor universality of the support stand, and the ground lying fan with single fan head has small air outlet area. UTILITY MODEL CONTENT

[0004] In view of the problems in the background art, the utility model aims at providing a fan head support frame to solve the problems of complex assembly, poor universality of the support frame and inability to meet the assembly requirement of multiple fan heads of the existing ground lying fan.

[0005] The utility model further provides a combined ground lying fan.

[0006] To achieve the purpose, the utility model adopts the following technical scheme:

[0007] A fan head support frame is installed on both sides of a fan head respectively for supporting the fan head, comprising inverted V-shaped support feet, a connecting rod, an adjusting and mounting assembly and an assembly assembly;

[0008] The connecting rod is horizontally arranged, and the two ends of the connecting rod are connected with the support feet on both sides of the inverted V-shaped support feet respectively;

[0009] The adjusting and mounting assembly is rotatably mounted on the connecting rod, the adjusting and mounting assembly is provided with mounting holes, and the assembly assembly penetrates through the mounting holes from one side of the connecting rod and is connected with the fan head on the other side of the connecting rod.

[0010] Preferably, the adjusting and mounting assembly comprises a mounting block and a semi-hollow rivet;

[0011] The mounting block is provided with at least two mounting holes, the semi-hollow rivet is arranged in one of the mounting holes, and the semi-hollow rivet is rotatably mounted on the connecting rod;

[0012] When the mounting block is rotated to coincide with the connecting rod, the assembly assembly is connected with the fan head through the semi-hollow rivet; when the mounting block is rotated to intersect with the connecting rod, the assembly assembly is connected with the fan head through any mounting hole.

[0013] Preferably, the mounting block is provided with three mounting holes at intervals along the length direction, and the semi-hollow rivet is arranged in the middle mounting hole.

[0014] Preferably, the mounting block is composed of two adjusting pieces, and each of the two adjusting pieces is provided with three mounting holes at intervals along the length direction, and the two ends of the semi-hollow rivet are connected with the two mounting holes of the two adjusting pieces respectively, and the two adjusting pieces are located on the two sides of the connecting rod respectively.

[0015] The adjusting piece comprises a piece body and two clamping blocks, the piece body is in the shape of a rectangular flat plate, the two clamping blocks are arranged at opposite sides of the piece body respectively, the two clamping blocks are centrally symmetric, the two clamping blocks protrude towards the same side plate of the piece body, the clamping blocks of the two adjusting pieces are arranged oppositely, and the two clamping blocks of the adjusting piece abut against the top and the bottom of the connecting rod respectively.

[0016] Preferably, the width of the piece body, the shortest distance between the two clamping blocks and the height of the connecting rod along the vertical direction are the same, which is D.

[0017] The distance by which the clamping block protrudes from the piece body and the width of the connecting rod along the horizontal direction are the same, which is d.

[0018] Preferably, the assembly component comprises a carriage screw and a locking nut.

[0019] The carriage screw comprises a head and a screw rod, the head is arranged at one end of the screw rod, and the other end of the screw rod is connected with the locking nut in sequence through the fan head and the adjusting and mounting assembly.

[0020] Preferably, the assembly component further comprises a rubber pad, the rubber pad is sleeved on the screw rod, and the rubber pad is located between the fan head and the adjusting and mounting assembly.

[0021] Preferably, an avoiding area is recessed inward at one end of the rubber pad close to the adjusting and mounting assembly, and the avoiding area is used for matching the semi-hollow rivet.

[0022] A combined prone fan comprises one fan head and two supporting frames as described above.

[0023] The two supporting frames are installed on the two sides of the fan head.

[0024] A combined prone fan comprises two fan heads and three supporting frames as described above.

[0025] The right side of one of the fan heads is installed on the left side of the support frame through the installation hole located below, and the left side of the other fan head is installed on the right side of the support frame through the installation hole located above.

[0026] The other sides of the two fan heads are respectively installed with the other two support frames.

[0027] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0028] By introducing the design of inverted V-shaped supporting feet and connecting rods, the fan can be flexibly supported while reducing the occupation of ground space. The inverted V-shaped supporting feet not only have stable and reliable structure, but also have small space occupation, are convenient to adjust and store, and the design makes the fan more compact when not in use, reducing space waste. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a schematic view of a combined floor fan according to an embodiment of the present application;

[0030] Figure 2 is a schematic view of a support frame according to an embodiment of the present application;

[0031] Figure 3 is Figure 2 is an exploded schematic view of

[0032] Figure 4 is a schematic view of a combined floor fan according to another embodiment of the present application;

[0033] Figure 5 is a schematic view of a support frame according to another embodiment of the present application;

[0034] Figure 6 is Figure 5 is an exploded schematic view of

[0035] Figure 7 is Figure 6 is an enlarged schematic view of A in

[0036] Wherein: inverted V-shaped supporting feet 1, connecting rod 2, adjusting and installing assembly 3, installation hole 30, installation block 31, adjusting piece 311, clamping block 3112, semi-hollow rivet 32, assembling assembly 4, coach screw 41, head 411, screw rod 412, locking nut 42, rubber pad 43, avoiding area 431, support frame 8 and fan head 9. DETAILED DESCRIPTION

[0037] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0038] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", 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.

[0039] Furthermore, the terms "first," "second," and "third" 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," "second," and "third" may explicitly or implicitly include one or more of that feature.

[0040] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] The following is in conjunction with the appendix Figures 1 to 7 The technical solution of this utility model will be further illustrated through specific implementation methods.

[0042] A fan head support bracket is installed on both sides of a fan head 9 to support the fan head 9, and includes an inverted V-shaped support foot 1, a connecting rod 2, an adjustment and installation component 3, and an assembly component 4;

[0043] The connecting rod 2 is horizontally arranged, and both ends of the connecting rod 2 are respectively connected to the two sides of the inverted V-shaped support leg 1;

[0044] The adjustment and mounting assembly 3 is rotatably mounted on the connecting rod 2. The adjustment and mounting assembly 3 is provided with a mounting hole 30. The assembly assembly 4 passes through the mounting hole 30 from one side of the connecting rod 2 and is connected to the fan head 9 on the other side of the connecting rod 2.

[0045] The support frame 8 of the utility model through the design of introducing inverted V type support foot 1 and connecting rod 2, can support fan head 9 flexibly, reduce the occupation of ground space simultaneously.

[0046] Compared with the traditional structure complex ground fan, the support frame 8 of the utility model through the design of assembling component 4 and adjusting installation component 3, greatly simplify the disassembly and assembly process of support frame and fan head.User can easily complete the assembly and disassembly of fan without complex tools or steps, improve the use efficiency.Further, adjusting installation component 3 is rotatably installed on connecting rod 2, which means that the height and angle of fan head 9 can be flexibly adjusted according to the needs, to adapt to different use environment and user demand.At the same time, assembling component 4 is installed and connected with fan head 9 through the installation hole 30 of adjusting installation component, so that the whole installation process is more convenient and fast, without complex tools or steps.

[0047] The fan head support frame 8 of the utility model through simple support foot structure cooperation adjustable installation component, not only improve the stability, versatility and flexibility of ground fan, also simplify the disassembly and assembly process, optimize space utilization, significantly improve the user's use experience.

[0048] Further, the adjusting installation component 3 includes installation block 31 and half hollow rivet 32;

[0049] The installation block 31 is provided with at least two installation holes 30, and the half hollow rivet 32 is arranged in one of the installation holes 30, and the half hollow rivet 32 is rotatably installed on the connecting rod 2;

[0050] When the installation block 31 rotates to coincide with the connecting rod 2, the assembling component 4 is connected with the fan head 9 through the half hollow rivet 32;When the installation block 31 rotates to intersect with the connecting rod 2, the assembling component 4 is connected with the fan head 9 through any installation hole 30.

[0051] The mounting block 31 is provided with at least two mounting holes 30, one of which is provided with a semi-hollow rivet 32, and the semi-hollow rivet 32 is rotatably mounted on the connecting rod 2. When the mounting block 31 is rotated to coincide with the connecting rod 2, the assembled component 4 can be connected with the fan head 9 through the semi-hollow rivet 32, which is a standard installation position. When the mounting block 31 is rotated to intersect with the connecting rod 2, in addition to the mounting hole 30 connected with the semi-hollow rivet 32, the other mounting hole 30 is located above or below the connecting rod 2, at this time, the assembled component 4 can select the other mounting hole 30 to be connected with the fan head 9, which provides more installation options for the user. At the same time, the specific height of the fan head 9 can be adjusted by adjusting the location of the other mounting hole 30 above or below the connecting rod 2. This design allows the height and angle of the fan head 9 to be flexibly adjusted. Users can easily adjust the fan head 9 to the best position and angle according to the specific use environment and personal needs, thereby improving the comfort and efficiency of use.

[0052] Further, the mounting block 31 is provided with three mounting holes 30 spaced apart along the length direction, and the semi-hollow rivet 32 is arranged in the middle mounting hole 30.

[0053] When the mounting block 31 is rotated to intersect with the connecting rod 2, the two outer mounting holes 30 are located above and below the connecting rod 2 respectively, and the assembled component 4 can select any one of the three mounting holes 30 to be connected with the fan head 9, which provides more installation options for the user.

[0054] Further, when the mounting block 31 is adjusted to be perpendicular to the connecting rod 2, the same support frame 8 can also simultaneously mount two fan heads 9. Specifically, as shown in Figure 4 one fan head 9 is arranged on the left side of the support frame 8, the right side of the fan head 9 is connected with the upper (or lower) mounting hole 30 through the assembled component 4; another fan head 9 is arranged on the right side of the support frame 8, the left side of the fan head 9 is connected with the lower (or upper) mounting hole 30 through the assembled component 4; and the other sides of the two fan heads 9 are respectively provided with another support frame 8, so that the entire combined fan assembly structure is stable. Since the two fan heads 9 are respectively located on the two sides of the support frame 8, they do not affect each other. Through the above mounting method, the support frame 8 of the present scheme can be assembled with multiple fan heads 9 according to actual use needs.

[0055] Further, the mounting block 31 is composed of two adjusting pieces 311, and the two adjusting pieces 311 are respectively provided with three mounting holes 30 spaced apart along the length direction, and the two ends of the semi-hollow rivet 32 are respectively connected with the two mounting holes 30 of the two adjusting pieces 311, and the two adjusting pieces 311 are respectively located on the two sides of the connecting rod 2.

[0056] The adjusting piece 311 comprises a piece body and two clamping blocks 3112, the piece body is in a rectangular flat plate shape, the two clamping blocks 3112 are separately arranged on the opposite two sides of the piece body, the two clamping blocks 3112 are centrally symmetric, the two clamping blocks 3112 protrude towards the same side plate of the piece body, the clamping blocks 3112 of the two adjusting pieces 311 are oppositely arranged, and the two clamping blocks 3112 of the adjusting piece 311 are respectively abutted against the top and the bottom of the connecting rod 2.

[0057] The two clamping blocks 3112 oppositely arranged on the two sides of the adjusting piece 311 are respectively abutted against the top and the bottom of the connecting rod 2 when the adjusting piece 311 is installed on the connecting rod 2; meanwhile, the sides provided with the clamping blocks 3112 of the two adjusting pieces 311 are oppositely arranged, so that the four clamping blocks 3112 of the two adjusting pieces cooperate to buckle the connecting rod 2 in the mounting block 31 and provide stable support for the mounting block 31. This design not only enhances the connection strength between the mounting block 31 and the connecting rod 2, but also reduces the risk of loosening or deformation caused by vibration or external force, thereby improving the structural stability of the entire support frame.

[0058] Further, since the two clamping blocks 3112 of the adjusting piece 311 are symmetrically arranged and abut against the upper and lower parts of the connecting rod 2, each adjusting piece 311 can only be rotated by 90° in the same direction. Specifically, please refer to Figure 3 and Figure 6 . The adjusting piece 311 located on the left side of the connecting rod 2 can only be adjusted from the state of Figure 3 to the state of Figure 6 by turning it upward by 90°, because the clamping block 3112 at the front end of the adjusting piece 311 abuts against the top of the connecting rod 2, so that the adjusting piece 311 cannot be turned downward in the state of Figure 3 ; and when the adjusting piece 311 is turned to the state of Figure 6 , the clamping block 3112 again abuts against the top of the connecting rod 2, so that the adjusting piece 311 cannot be further turned. Similarly, the adjusting piece 311 located on the right side of the connecting rod 2 can only be adjusted from the state of Figure 3 to the state of Figure 6 by turning it downward by 90°, because the clamping block 3112 at the front end of the adjusting piece 311 abuts against the bottom of the connecting rod 2, so that the adjusting piece 311 cannot be turned upward in the state of Figure 3 ; and when the adjusting piece 311 is turned to the state of Figure 6 , the clamping block 3112 again abuts against the bottom of the connecting rod 2, so that the adjusting piece 311 cannot be further turned. Therefore, the mounting block 31 adjusts the two adjusting pieces 311 to the two mounting states of the support frame respectively. When the support frame 8 is in the state of Figures 4 to 6When the state of the fan head 9 is adjusted, the two sides of a support frame 8 can be connected to two fan heads 9 respectively.

[0059] Further, the width of the sheet body, the shortest distance between the two clamping blocks 3112, and the height of the connecting rod 2 in the vertical direction are all the same, D.

[0060] The distance of the clamping block 3112 protruding from the sheet body and the width of the connecting rod 2 in the horizontal direction are the same, d.

[0061] By making the width of the sheet body, the shortest distance between the two clamping blocks 3112, and the height of the connecting rod 2 in the vertical direction all the same (D), the size of the connecting structure and the adjusting structure of the entire support frame 8 is consistent, which helps to enhance the overall stability of the support frame, as the components can fit more tightly and uniformly, reducing shaking or instability caused by size differences. At the same time, this design also makes the support frame more compact in structure, occupying less space, facilitating installation and use in limited space.

[0062] The distance of the clamping block 3112 protruding from the sheet body and the width of the connecting rod 2 in the horizontal direction are the same (d), which allows the clamping block 3112 to effectively play a role in limiting rotation.

[0063] Further, the assembly component 4 includes a carriage screw 41 and a locking nut 42.

[0064] The carriage screw 41 includes a head 411 and a screw rod 412, the head 411 is arranged at one end of the screw rod 412, and the other end of the screw rod 412 is sequentially connected with the locking nut 42 through the fan head 9 and the adjusting mounting assembly 3.

[0065] By using the combination of the carriage screw 41 and the locking nut 42, the connection between the fan head 9 and the adjusting mounting assembly 3 is more secure and reliable. The head 411 of the carriage screw is limited in the limiting mechanism of the fan head 9, and the screw rod 412 of the carriage screw is threaded out of the fan head 9 and connected with the locking nut 42 through the adjusting mounting assembly 3, further enhancing the stability of the connection and preventing loosening or falling off that may occur during use.

[0066] Because of the combination of the carriage screw 41 and the locking nut 42, when the fan head 9 or the adjusting mounting assembly 3 needs to be repaired or replaced, the user can easily disassemble these components without damaging the structure of the entire support frame. This design enhances the maintainability and replaceability of the structure, prolonging the service life of the product.

[0067] Further, the assembly component 4 further comprises a rubber pad 43, which is sleeved on the screw rod 412, and is located between the fan head 9 and the adjustment mounting component 3.

[0068] The rubber pad 43 is sleeved on the screw rod 412 and is located between the fan head 9 and the adjustment mounting component 3, which effectively enhances the damping and buffering effect of the support frame 8. When the fan head 9 vibrates during operation, the rubber pad 43 can absorb and disperse the vibration energy, thereby reducing the impact and damage to the adjustment mounting component 3 and the entire support frame.

[0069] The damping and buffering effect of the rubber pad 43 not only protects the structure of the support frame 8, but also reduces the noise and vibration generated by the fan head 9 during operation. This is particularly important for places that need to maintain a quiet environment, such as offices, bedrooms, etc. By reducing noise and vibration, users can enjoy the cooling brought by the fan more comfortably.

[0070] Further, the rubber pad 43 is recessed inward at one end near the adjustment mounting component 3, and is provided with a clearance area 431 for cooperating with the semi-hollow rivet 32.

[0071] The design of the clearance area 431 allows the rubber pad 43 to more smoothly cooperate with the semi-hollow rivet 32 during installation. This avoids installation difficulties or damage caused by interference between the rubber pad 43 and the semi-hollow rivet 32 during installation. At the same time, it also simplifies the installation steps and improves assembly efficiency.

[0072] A combined floor fan, comprising one fan head 9 and two support frames 8 as described above;

[0073] Two support frames 8 are installed on both sides of the fan head 9.

[0074] By installing two support frames 8 on both sides of the fan head 9, the overall stability and support force of the combined floor fan are significantly improved. The two support frames 8 can evenly share the weight and vibration of the fan head 9 during operation, thereby reducing the load on a single support point and avoiding problems such as damage to the support frame or tilting of the fan head caused by excessive load.

[0075] The design of the combined floor fan allows the fan head 9 and the two support frames 8 to be independently installed and removed, which provides flexibility for users to adjust according to actual needs and space layout.

[0076] A combined floor fan, comprising two fan heads 9 and three support frames 8 as described above;

[0077] One of the support frames 8 has its adjusting mounting assembly 3 and connecting rod 2 perpendicular to each other, and the right side of one of the fan heads 9 is mounted to the left side of the support frame 8 through the mounting hole 30 located below, and the left side of the other fan head 9 is mounted to the right side of the support frame 8 through the mounting hole 30 located above.

[0078] The other sides of the two fan heads 9 are respectively mounted to the other two support frames 8.

[0079] The design of the adjusting mounting assembly 3 and the connecting rod 2 of one of the support frames 8 perpendicular to each other allows the support frame 8 to serve as the vertical support point for the two fan heads 9. This layout not only increases the flexibility of installation, but also allows the fan heads 9 to be adjusted up and down as needed to adapt to different height and angle requirements. At the same time, the other two support frames 8 are respectively located on the other sides of the two fan heads 9, providing stable support for the entire combined floor fan. The combined floor fan of this embodiment allows the two fan heads 9 to share one of the support frames 8, thereby reducing the required space and the number of components. This compact layout not only saves space, but also makes the entire floor fan easier to carry and store.

[0080] Further, in order to meet the requirements of larger wind power or larger blowing area, the fan heads 9 and support frames 8 can be increased to meet the assembly combinations of different combined floor fans.

[0081] The technical principles of the present application are described above in combination with specific embodiments. These descriptions are only to explain the principles of the present application, and cannot be interpreted in any way as a limitation on the scope of protection of the present application. Based on the explanations here, those skilled in the art can think of other specific embodiments of the present application without creative labor, and these ways will fall within the scope of protection of the present application.

Claims

1. A fan head support frame, which is respectively installed on both sides of a fan head, for supporting the fan head, characterized in that: The support frame comprises inverted V-shaped supporting legs, a connecting rod, an adjusting mounting assembly and an assembling assembly; The connecting rod is horizontally arranged, and two ends of the connecting rod are connected with two sides of the inverted V-shaped supporting legs, respectively; The adjusting mounting assembly is rotatably mounted on the connecting rod, and the adjusting mounting assembly is provided with mounting holes, and the assembling assembly penetrates through the mounting holes and is connected with the fan head on the other side of the connecting rod.

2. A fan head support frame according to claim 1, wherein: The adjusting mounting assembly comprises mounting blocks and half-hollow rivets; The mounting blocks are provided with at least two mounting holes, and the half-hollow rivets are arranged in one of the mounting holes, and the half-hollow rivets are rotatably mounted on the connecting rod; When the mounting blocks are rotated to coincide with the connecting rod, the assembling assembly is connected with the fan head through the half-hollow rivets; when the mounting blocks are rotated to intersect with the connecting rod, the assembling assembly is connected with the fan head through any one of the mounting holes.

3. A fan head support frame according to claim 2, wherein: The mounting blocks are provided with three mounting holes at intervals along the length direction, and the half-hollow rivets are arranged in the middle mounting hole.

4. A fan head support frame according to claim 3, wherein: The mounting blocks are composed of two adjusting pieces, and the two adjusting pieces are provided with three mounting holes at intervals along the length direction, respectively, and two ends of the half-hollow rivets are connected with two mounting holes of the two adjusting pieces, respectively, and the two adjusting pieces are located on two sides of the connecting rod, respectively; The adjusting piece comprises a piece body and two clamping blocks, the piece body is in the shape of a rectangular flat plate, the two clamping blocks are arranged at opposite sides of the piece body, the two clamping blocks are centrally symmetric, the two clamping blocks protrude towards the same side plate of the piece body, the clamping blocks of the two adjusting pieces are oppositely arranged, and the two clamping blocks of the adjusting piece are respectively abutted against the top and the bottom of the connecting rod.

5. A fan head support frame according to claim 4, wherein: The width of the piece body, the shortest distance between the two clamping blocks and the height of the connecting rod in the vertical direction are the same, and are D; The protruding distance of the clamping blocks from the piece body and the width of the connecting rod in the horizontal direction are the same, and are d.

6. A fan head support frame according to claim 1, wherein: The assembling assembly comprises a coach screw and a locking nut; The coach screw comprises a head and a screw rod, the head is arranged at one end of the screw rod, and the other end of the screw rod penetrates through the fan head and the adjusting mounting assembly and is connected with the locking nut.

7. A fan head support frame according to claim 6, wherein: The assembling assembly further comprises a rubber pad, the rubber pad is sleeved on the screw rod, and the rubber pad is located between the fan head and the adjusting mounting assembly.

8. A fan head support frame according to claim 7, wherein: The end of the rubber pad close to the adjusting mounting assembly is inwardly recessed to form a avoiding area, and the avoiding area is used for matching the half-hollow rivet.

9. A combination floor fan characterized by, The support frame comprises one fan head and two support frames according to any one of claims 1-8; The two support frames are mounted on two sides of the fan head.

10. A combination floor fan characterized by, The support frame comprises two fan heads and three support frames according to any one of claims 3-8; The adjusting mounting assembly and the connecting rod of one support frame are perpendicular to each other, the right side of one fan head is mounted on the left side of the support frame through the lower mounting hole, and the left side of the other fan head is mounted on the right side of the support frame through the upper mounting hole. The other side of the two fan heads is respectively connected with the other two support frames.

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