A fan

Abstract

The application discloses a fan and relates to the technical field of household appliances, which comprises a base, a stand, a fan head and a motor heat dissipation unit. The motor heat dissipation unit comprises an air exhaust structure arranged in the fan head unit and an air flow guide structure fixedly installed at the inner portion of the front mesh cover and close to the center. The air flow guide structure is used for recycling part of the air blown by the fan blade and guiding the air to the air exhaust structure. The air exhaust structure is used for uniformly blowing the air collected by the air flow guide structure to the inner portion of the fan head unit. The motor heat dissipation unit is arranged. A small part of the air blown by the fan blade is recycled to cool and dissipate heat of the motor. The load of the motor is not increased, and the temperature of the motor is reduced. Therefore, energy waste can be effectively avoided, and the fan is more energy-saving.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, specifically to a fan. Background Technology

[0002] An electric fan, also known as a fan or ventilator, is a household appliance that uses an electric motor to drive the fan blades to rotate, thereby accelerating the circulation of air. It is mainly used for cooling and ventilating the air and is widely used in homes, classrooms, offices, shops, hospitals, hotels, and other places.

[0003] Fans are generally driven by a fan motor to rotate the fan blades. Therefore, the operating temperature of a fan motor is higher than that of other motors. In the current technology, in order to achieve the effect of heat dissipation, the motor inside the fan has a vent hole on the back cover of the motor. A cooling fan is installed inside the back cover. The cooling fan is coaxially fixed with the motor shaft. When the motor is running, the rotation of the shaft drives the cooling fan to rotate, thereby forming airflow to dissipate heat from the motor in time.

[0004] However, since the cooling fan is mounted on the motor shaft, the motor's load increases when it drives the fan, causing it to consume more energy and generate more heat, further raising the temperature. This results in high energy consumption and makes the fan less energy-efficient and environmentally friendly. Therefore, we propose a new type of fan. Summary of the Invention

[0005] The purpose of this invention is to provide a fan that solves the problem in the prior art where the cooling fan is mounted on the motor shaft. As a result, when the motor drives the cooling fan to rotate, it also increases the load on the motor, causing the motor to consume more energy and generate more heat, which further raises the temperature. Therefore, the fan has high energy consumption and is not energy-efficient or environmentally friendly.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a fan, comprising:

[0007] Base;

[0008] Columns;

[0009] A fan head, comprising a fan head unit disposed at the top of a column, a rear mesh cover fitted at one end of the fan head unit, a front mesh cover fixedly installed at the end of the rear mesh cover away from the fan head unit, and fan blades connected to the fan head unit disposed inside the rear mesh cover.

[0010] The motor cooling unit includes an exhaust structure disposed inside the fan head unit and an airflow guiding structure fixedly installed inside the front grille near the center. The airflow guiding structure is used to collect the part blown out by the fan blades and guide it into the exhaust structure. The exhaust structure is used to blow the airflow collected by the airflow guiding structure evenly into the fan head unit.

[0011] The column is fixedly installed on the top of the base, and the fan head is located on the top of the column.

[0012] Preferably, the airflow guiding structure includes an outer shell fixedly installed inside the front grille near the center and an inner support column disposed inside the outer shell. The inner support column and the outer shell are fixedly connected by a guide vane. Several blades are disposed between the outer shell and the inner support column. The blades are fan-shaped. A wind deflector is fixedly installed on one side of the inner wall of the outer shell. Several air holes are opened on the inner wall surface of the outer shell near the wind deflector. An outer cover is fixedly installed on the outside of the outer shell at the position of the air holes. The outer cover is open on the side facing the outer shell. Several U-shaped air pipes are fixedly installed on the side of the outer cover away from the outer shell. A connector sleeve is fixedly installed at one end of each U-shaped air pipe. A blade retraction structure for driving the blades to turn is provided on the outside of the outer shell.

[0013] Preferably, the blade retraction structure includes a cylinder fixedly installed on the outer wall of the outer shell and an outer frame slidably installed on the outside of the outer shell. The output end of the cylinder is rotatably connected to the outer frame through a hinge seat. Several corner plates are fixedly installed on the outer wall surface of the outer frame along the circumferential direction. A first hinge plate is rotatably installed on one end of the corner plate. A second hinge plate is rotatably installed on the end of the first hinge plate away from the corner plate. A rotating rod is fixedly installed on the end of the second hinge plate away from the first hinge plate. One end of the rotating rod passes through the outer shell and is fixedly connected to the blade. A rotating block is fixedly installed on the end of the blade away from the rotating rod. The rotating block is rotatably installed in a rotating hole opened on the outer wall of the inner support.

[0014] Preferably, the inner wall surface of the outer shell has several guide grooves near the wind baffle, and the guide grooves are interconnected with the air holes.

[0015] Preferably, the fan head unit includes a lower cover and an upper cover fixedly installed on the top of the lower cover. Side covers are fixedly installed at both ends of the upper and lower covers. A support rod is rotatably installed at the bottom of the lower cover and fixedly installed on the top of the column. A notch is opened at one end of the lower cover. Top frames are fixedly installed at both ends of the lower cover. A circuit board is fixedly installed at the top of the top frame. A rear mesh cover mounting seat is fixedly installed on the side of the lower cover near the rear mesh cover. A fan blade drive structure for driving the fan blade to rotate is provided inside the rear mesh cover mounting seat.

[0016] Preferably, the fan blade drive structure includes a first motor fixedly installed inside the rear cover mounting base and a threaded seat fixedly installed at one end of the rear cover mounting base. The power output end of the first motor passes through the threaded seat and is fixedly connected to a fan blade rotating rod. The outer walls of the fan blade rotating rod are fixedly installed with clamping rods for engaging the fan blade. The outer wall of the fan blade rotating rod away from the threaded seat has an external thread. The external thread is fitted with a fan blade nut for fixing the fan blade. The threaded seat is fitted with a rear cover nut for fixing the rear cover.

[0017] Preferably, the fan blade rotor has an air guide channel inside, and the air guide channel passes through the end of the fan blade rotor away from the first motor. A bearing is fixedly installed at one end of the air guide channel, and an insert is rotatably installed inside the bearing. One end of the insert extends into the air guide channel, and a gas collecting hood is fixedly installed at the other end of the insert. A conical plate is fixedly installed inside the gas collecting hood, and a conduit connector connected to the connector sleeve is fixedly installed around the outer wall of the gas collecting hood.

[0018] Preferably, the threaded seat has an air collecting chamber inside, a partition is fixedly installed at one end of the air collecting chamber, and several arc-shaped air pipes are fixedly installed on the outer wall surface of the fan blade rotor inside the air collecting chamber, and the arc-shaped air pipes are interconnected with the air guide channel.

[0019] Preferably, the exhaust structure includes a hollow ring pipe fixedly installed inside the rear mesh cover mounting base. A plurality of air intake ducts are fixedly connected to the inner wall surface of the hollow ring pipe. The end of the air intake duct away from the hollow ring pipe extends into the air collection chamber. A plurality of connecting branch pipes are fixedly connected to the outer wall surface of the hollow ring pipe. A nozzle is fixedly installed at one end of the connecting branch pipe, and the nozzle surrounds the outside of the first motor.

[0020] Preferably, the fan head unit further includes a steering structure, which includes a second motor and a third motor fixedly installed inside the lower cover. A first gear is fixedly installed at the power output end of the second motor. The first gear meshes with a first incomplete gear. A side plate is fixedly installed at one end of the first incomplete gear. The side plate is rotatably installed on one side of the inner wall of the top frame. A second gear is fixedly installed at the power output end of the third motor. The second gear meshes with a second incomplete gear. The second incomplete gear is fixedly installed outside the support rod.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] This invention utilizes a motor cooling unit. During actual use, when the temperature sensor detects that the temperature inside the lower casing reaches a set value, the circuit board controls the airflow guiding structure to operate. The cylinder then pushes the outer frame towards the outer casing. The outer frame, in turn, rotates by pulling the second hinge plate via the first hinge plate. Since the end of the second hinge plate furthest from the first hinge plate cannot move, when one end of the second hinge plate is pulled by the first hinge plate, it drives the rotating rod to rotate, simultaneously rotating multiple blades. This allows all the blades to close, creating a barrier inside the outer casing that obstructs airflow. The airflow blocked by the blades then spreads outwards from the inner support pillar, thus... The air accumulates at the angle between the blades and the outer casing. As the airflow increases, it gradually moves into the guide groove, then enters the outer casing through several air holes, and then enters the air collection hood through the U-shaped air pipe and connector sleeve. At the same time, it enters the air guide channel through the insertion pipe, and then is ejected from the four arc-shaped air pipes. The ejected air gathers in the air collection chamber, and then the exhaust structure blows the airflow onto the surface of the first motor, which can quickly remove the heat from the motor. At the same time, the cool air can fully contact the motor casing, improving the heat dissipation effect of the motor. By recovering a small portion of the airflow blown out by the fan blades to cool the motor, it not only does not increase the load on the motor, but also reduces the temperature of the motor, thereby effectively avoiding energy waste and making it more energy-efficient. Attached Figure Description

[0023] Figure 1 A first-person perspective stereoscopic view of a fan;

[0024] Figure 2 A second-view stereoscopic image of a fan;

[0025] Figure 3 A schematic diagram of the rear grille structure of a fan;

[0026] Figure 4 This is a schematic diagram of the internal structure of a fan head unit.

[0027] Figure 5 A first-person perspective 3D view of a fan's steering structure;

[0028] Figure 6 A second-view perspective stereoscopic view of a fan's steering structure;

[0029] Figure 7 A schematic diagram of a fan rear grille mounting base and airflow guiding structure;

[0030] Figure 8 A cross-sectional view of a fan rear grille mounting base and airflow guiding structure;

[0031] Figure 9 for Figure 8 A magnified structural diagram of A in the middle;

[0032] Figure 10 This is a schematic diagram of the exhaust structure of a fan;

[0033] Figure 11 A schematic diagram of an airflow guiding structure for a fan;

[0034] Figure 12 This is a schematic diagram of the airflow guiding structure of a fan in the state without the wind deflector installed.

[0035] Figure 13 This is a schematic diagram of a fan blade folding structure.

[0036] In the diagram: 10-Base; 20-Column; 30-Fan head unit; 31-Upper cover; 32-Lower cover; 321-Notch; 322-Side plate; 323-First incomplete gear; 33-Side cover; 34-Rear screen mounting base; 341-Rear screen nut; 342-Threaded seat; 343-Baffle; 344-Fan blade nut; 345-Air collection chamber; 35-First motor; 351-Fan blade rotor; 352-Air guide channel; 353-External thread; 354-Air collection hood; 355-Conduit connector; 356-Conical plate; 357-Insertion tube; 358-Bearing; 359-Arc-shaped air pipe; 36-Support rod; 361-Second incomplete gear; 37-Top frame; 371-Circuit board; 38 - Second motor; 381- First gear; 39- Third motor; 391- Third gear; 40- Rear guard; 50- Front guard; 60- Fan blade; 70- Airflow guiding structure; 71- Outer shell; 711- Guide groove; 712- Air hole; 72- Inner support; 73- Blade folding structure; 731- Cylinder; 732- Outer frame; 733- Blade; 734- Hinge seat; 735- Rotating block; 736- Angle plate; 737- First hinge plate; 738- Second hinge plate; 739- Rotating rod; 74- Outer cover; 75- U-shaped air pipe; 76- Connector sleeve; 77- Wind baffle; 80- Exhaust structure; 81- Hollow ring pipe; 82- Inlet duct; 83- Connecting branch pipe; 84- Nozzle. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Please see Figures 1-13 The present invention provides a technical solution: a fan, including a base 10, a column 20, a fan head and a motor heat dissipation unit.

[0039] The fan head includes a fan head unit 30 located at the top of the column 20. A rear mesh cover 40 is fitted onto one end of the fan head unit 30. A front mesh cover 50 is fixedly installed on the end of the rear mesh cover 40 away from the fan head unit 30. Fan blades 60 connected to the fan head unit 30 are provided inside the rear mesh cover 40.

[0040] In this embodiment, the motor heat dissipation unit includes an exhaust structure 80 disposed inside the fan head unit 30 and an airflow guiding structure 70 fixedly installed inside the front grille 50 near the center. The airflow guiding structure 70 is used to collect the part blown out by the fan blade 60 and guide it into the exhaust structure 80. The exhaust structure 80 is used to blow the airflow collected by the airflow guiding structure 70 evenly into the fan head unit 30.

[0041] The column 20 is fixedly installed on the top of the base 10, and the fan head is set on the top of the column 20.

[0042] In a preferred embodiment, the airflow guiding structure 70 includes an outer shell 71 fixedly installed inside the front grille 50 near the center, and an inner support column 72 disposed inside the outer shell 71. The end of the inner support column 72 is tapered, which can diffuse air in all directions. The inner support column 72 and the outer shell 71 are fixedly connected by guide vanes. A plurality of blades 733 are disposed between the outer shell 71 and the inner support column 72. A wind deflector 77 is fixedly installed on one side of the inner wall of the outer shell 71. A plurality of air holes 712 are opened on the inner wall surface of the outer shell 71 near the wind deflector 77. The outer side of the outer shell 71 is located at the air holes 712. An outer protective cover 74 is fixedly installed in a position. The outer protective cover 74 is open on the side facing the outer shell 71. Several U-shaped air pipes 75 are fixedly installed on the side of the outer protective cover 74 away from the outer shell 71. A connector sleeve 76 is fixedly installed at one end of the U-shaped air pipe 75. The outer shell 71 is provided with a blade retraction structure 73 for driving the blades 733 to turn. Several guide grooves 711 are opened on the inner wall surface of the outer shell 71 near the wind baffle 77. The guide grooves 711 are interconnected with the air holes 712. The design of the guide grooves 711 facilitates the convergence of airflow to the air holes 712, helping the airflow to quickly enter the air holes 712.

[0043] Furthermore, the blade folding structure 73 can simultaneously drive multiple blades 733 to rotate, which can close all the blades 733. Therefore, it will form a barrier inside the outer shell 71 to block the airflow. The airflow blocked by the blades 733 will follow the blades 733 and then spread outward from the inner support 72 as the center. This will cause the air to accumulate at the angle between the blades 733 and the outer shell 71. As the airflow increases, the airflow will gradually move into the guide groove 711, and then enter the outer cover 74 through several air holes 712. Then it will enter the air collection hood 354 through the U-shaped air pipe 75 and the connector sleeve 76.

[0044] It should be noted that the blade 733 has a fan-shaped structure. The end of the blade 733 near the inner wall of the outer casing 71 is arc-shaped and fits against the inner wall of the outer casing 71. The end of the blade 733 near the outer wall of the inner support 72 is arc-shaped and fits against the outer wall of the inner support 72. Furthermore, the several blades 733 can form a circle, the diameter of which is the same as the inner diameter of the outer casing 71, which can ensure the sealing performance.

[0045] In a preferred embodiment, the blade retraction structure 73 includes a cylinder 731 fixedly mounted on the outer wall of the outer casing 71 and an outer frame 732 slidably mounted on the outside of the outer casing 71. The output end of the cylinder 731 is rotatably connected to the outer frame 732 through a hinge seat 734. A plurality of corner plates 736 are fixedly mounted on the outer wall surface of the outer frame 732 along the circumferential direction. A first hinge plate 737 is rotatably mounted on one end of the corner plate 736. A second hinge plate 738 is rotatably mounted on the end of the first hinge plate 737 away from the corner plate 736. A rotating rod 739 is fixedly mounted on the end of the second hinge plate 738 away from the first hinge plate 737. One end of the rotating rod 739 passes through the outer casing 71 and is fixedly connected to the blade 733. A rotating block 735 is fixedly mounted on the end of the blade 733 away from the rotating rod 739. The rotating block 735 is rotatably mounted in a rotating hole opened in the outer wall of the inner support column 72.

[0046] Furthermore, when the temperature sensor detects that the temperature inside the lower cover 32 reaches the set value, the circuit board 371 will activate the blade retraction structure 73, and the cylinder 731 will push the outer frame 732 to move closer to the outer cover 74. The outer frame 732 can then pull the second hinge plate 738 to rotate via the first hinge plate 737. Since the end of the second hinge plate 738 away from the first hinge plate 737 cannot move, when one end of the second hinge plate 738 is pulled by the first hinge plate 737, the second hinge plate 738 will drive the rotating rod 739 to rotate, which can simultaneously drive multiple blades 733 to rotate, thus closing all the blades 733. Conversely, when the cylinder 731 pulls the outer frame 732 to move, it can open the blades 733.

[0047] To elaborate further, under normal conditions, the blades 733 are in the open state, which does not affect the airflow. Moreover, compared to the traditional fan front grille 50 which is solid in the center, it can improve the fan's blowing effect. At this time, the outer frame 732 is a certain distance away from the outer cover 74, which will not affect the movement of the outer frame 732.

[0048] In a preferred embodiment, the fan head unit 30 includes a lower cover 32 and an upper cover 31 fixedly installed on the top of the lower cover 32. Side covers 33 are fixedly installed at both ends of the upper cover 31 and the lower cover 32. A support rod 36 is rotatably installed at the bottom of the lower cover 32. The support rod 36 is fixedly installed on the top of the column 20. A notch 321 is opened at one end of the lower cover 32. Top frames 37 are fixedly installed at both ends of the lower cover 32. A circuit board 371 is fixedly installed at the top of the top frame 37. A rear mesh cover mounting seat 34 is fixedly installed on the side of the lower cover 32 near the rear mesh cover 40. The rear mesh cover mounting seat 34 is provided with a fan blade drive structure for driving the fan blade 60 to rotate.

[0049] It should be noted that the circuit board 371 is a prior art structure and belongs to the conventional design on the fan. The circuit board 371 of this application includes a temperature sensor. The temperature sensor and the cylinder 731 are electrically connected to the circuit board 371. The temperature sensor is installed inside the lower cover 32 and is used to detect the temperature inside the lower cover 32. When the temperature sensor detects that the temperature inside the lower cover 32 reaches the set value (the set value is 20 degrees to 30 degrees), the circuit board 371 will control the cylinder 731 to work, which can realize the rotation of the blades 733 and close all the blades 733.

[0050] In a preferred embodiment, the fan blade drive structure includes a first motor 35 fixedly installed inside the rear cover mounting base 34 and a threaded seat 342 fixedly installed at one end of the rear cover mounting base 34. The power output end of the first motor 35 passes through the threaded seat 342 and is fixedly connected to a fan blade rotating rod 351. The outer walls of the fan blade rotating rod 351 are fixedly fitted with clamping rods for engaging the fan blade 60. The outer wall of the fan blade rotating rod 351 away from the threaded seat 342 has an external thread 353. The external thread of the external thread 353 is fitted with a fan blade nut 344 for fixing the fan blade 60. The external thread of the threaded seat 342 is fitted with a rear cover nut 341 for fixing the rear cover 40. When the first motor 35 operates, it can drive the fan blade rotating rod 351 to rotate, which in turn drives the fan blade 60 on the fan blade rotating rod 351 to rotate.

[0051] In a preferred embodiment, the fan blade rotor 351 has an air guide channel 352 inside, and the air guide channel 352 passes through the end of the fan blade rotor 351 away from the first motor 35. A bearing 358 is fixedly installed at one end of the air guide channel 352, and an insert tube 357 is rotatably installed inside the bearing 358. One end of the insert tube 357 extends into the air guide channel 352, and a gas collecting hood 354 is fixedly installed at the other end of the insert tube 357. A conical plate 356 is fixedly installed inside the gas collecting hood 354. A conduit connector 355 connected to the connector sleeve 76 is fixedly installed around the outer wall of the gas collecting hood 354. A gas collecting chamber 345 is opened inside the threaded seat 342. A partition plate 343 is fixedly installed at one end of the gas collecting chamber 345. Several arc-shaped air pipes 359 are fixedly installed on the outer wall surface of the fan blade rotor 351 inside the gas collecting chamber 345. The arc-shaped air pipes 359 are interconnected with the air guide channel 352.

[0052] Furthermore, when the gas enters the gas collection hood 354, it will simultaneously enter the air guide channel 352 through the insertion tube 357, and then be ejected from the four arc-shaped air pipes 359. The ejected air will gather in the gas collection chamber 345, and then the exhaust structure 80 will blow the airflow toward the surface of the first motor 35, which can quickly remove the heat from the motor.

[0053] It should be noted that since the insertion tube 357 is rotatably connected to the fan blade rotor 351 via the bearing 358, the rotation of the fan blade rotor 351 will not cause the insertion tube 357 to rotate, thus not affecting the normal rotation of the fan blade rotor 351, nor increasing the load on the motor. Furthermore, since the air collection cover 354 is connected to the connector sleeve 76 via the conduit connector 355, the air collection cover 354 can be fixed. And since the outer shell 71 is fixedly installed on the front grille 50, when installing the front grille 50, the insertion tube 357 at the end of the air collection cover 354 will also be inserted into the bearing 358 in the air guide channel 352, realizing the connection between the insertion tube 357 and the air guide channel 352. This not only makes installation convenient but also allows for disassembly without affecting the normal disassembly of the fan.

[0054] In a preferred embodiment, the exhaust structure 80 includes a hollow annular pipe 81 fixedly installed inside the rear mesh cover mounting base 34. A plurality of air inlet ducts 82 are fixedly connected to the inner wall surface of the hollow annular pipe 81. The end of each air inlet duct 82 away from the hollow annular pipe 81 extends into the air collection chamber 345. A plurality of connecting branch pipes 83 are fixedly connected to the outer wall surface of the hollow annular pipe 81. A nozzle 84 is fixedly installed at one end of each connecting branch pipe 83, and the nozzle 84 surrounds the outside of the first motor 35. When gas enters the air collection chamber 34... After 5 minutes, the gas enters the hollow ring pipe 81 from the air inlet duct 82, then enters the nozzle 84 through the connecting branch pipe 83, and finally exits from the nozzle 84. The airflow blows towards the outside of the first motor 35, which can quickly remove the heat from the motor. At the same time, the cold air can fully contact the motor housing, improving the heat dissipation effect on the motor. The gas also enters the fan head unit 30, which can also dissipate heat from the components and motor inside the fan head unit 30. Finally, the gas is discharged from the heat dissipation vent on the surface of the side cover 33.

[0055] In a preferred embodiment, the fan head unit 30 further includes a steering structure. The steering structure includes a second motor 38 and a third motor 39 fixedly installed inside the lower cover 32. The power output end of the second motor 38 is fixedly mounted with a first gear 381, which meshes with a first incomplete gear 323. One end of the first incomplete gear 323 is fixedly mounted with a side plate 322, which is rotatably mounted on one side of the inner wall of the top frame 37. The power output end of the third motor 39 is fixedly mounted with a second gear 391, which meshes with a second incomplete gear 361. The second incomplete gear 361 is fixedly installed outside the support rod 36. When the second motor 38 operates, it drives the first gear 381 to rotate. Since the first gear 381 meshes with the first incomplete gear 323 and the first incomplete gear 323 is fixed, it can drive the fan head unit 30 to rotate vertically. Similarly, when the third motor 39 operates, it can drive the fan head unit 30 to rotate horizontally.

[0056] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0057] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention) may be omitted.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A fan, characterized in that, include: Base (10); Column (20); The fan head includes a fan head unit (30) disposed at the top of the column (20), a rear mesh cover (40) is sleeved on one end of the fan head unit (30), a front mesh cover (50) is fixedly installed on the end of the rear mesh cover (40) away from the fan head unit (30), and a fan blade (60) connected to the fan head unit (30) is disposed inside the rear mesh cover (40). The motor cooling unit includes an exhaust structure (80) disposed inside the fan head unit (30) and an airflow guide structure (70) fixedly installed inside the front grille (50) near the center. The airflow guide structure (70) is used to collect the part blown out by the fan blades (60) and guide it into the exhaust structure (80). The exhaust structure (80) is used to blow the airflow collected by the airflow guide structure (70) evenly into the fan head unit (30). The column (20) is fixedly installed on the top of the base (10), and the fan head is set on the top of the column (20); The airflow guiding structure (70) includes an outer shell (71) fixedly installed inside the front grille (50) near the center and an inner support column (72) disposed inside the outer shell (71). The inner support column (72) and the outer shell (71) are fixedly connected by a guide vane. Several blades (733) are disposed between the outer shell (71) and the inner support column (72). The blades (733) are fan-shaped. A baffle plate (77) is fixedly installed on one side of the inner wall of the outer shell (71). The inner wall surface of the outer shell (71) is close to the baffle plate (77). 7) Several air holes (712) are provided at the location. An outer cover (74) is fixedly installed on the outside of the outer shell (71) at the location of the air holes (712). The outer cover (74) is open on the side facing the outer shell (71). Several U-shaped air pipes (75) are fixedly installed on the side of the outer cover (74) away from the outer shell (71). A connector sleeve (76) is fixedly installed at one end of the U-shaped air pipe (75). A blade retraction structure (73) for driving the blade (733) to turn is provided on the outside of the outer shell (71). The fan head unit (30) includes a lower cover (32), and a rear cover mounting base (34) is fixedly installed on the side of the lower cover (32) near the rear cover (40). The rear cover mounting base (34) is provided with a fan blade driving structure for driving the fan blade (60) to rotate. The fan blade driving structure includes a first motor (35) fixedly installed inside the rear cover mounting base (34) and a threaded seat (342) fixedly installed at one end of the rear cover mounting base (34). The power output end of the first motor (35) passes through the threaded seat (342) and is fixedly connected to a fan blade rotating rod (351). The fan blade rotor (351) has an air guide channel (352) inside, and the air guide channel (352) passes through the end of the fan blade rotor (351) away from the first motor (35). A bearing (358) is fixedly installed at one end of the air guide channel (352). A tube (357) is rotatably installed inside the bearing (358). One end of the tube (357) extends into the air guide channel (352). A gas collecting hood (354) is fixedly installed at the other end of the tube (357). A conical plate (356) is fixedly installed inside the gas collecting hood (354). A conduit connector (355) connected to the connector sleeve (76) is fixedly installed around the outer wall of the gas collecting hood (354).

2. A fan according to claim 1, characterized in that: The blade retraction structure (73) includes a cylinder (731) fixedly installed on the outer wall of the outer shell (71) and an outer frame (732) slidably installed on the outside of the outer shell (71). The output end of the cylinder (731) is rotatably connected to the outer frame (732) through a hinge seat (734). Several corner plates (736) are fixedly installed on the outer wall surface of the outer frame (732) along the circumferential direction. A first hinge plate (737) is rotatably installed on one end of each corner plate (736). 7) A second hinge plate (738) is rotatably installed at the end away from the corner plate (736). A rotating rod (739) is fixedly installed at the end of the second hinge plate (738) away from the first hinge plate (737). One end of the rotating rod (739) passes through the outer shell (71) and is fixedly connected to the blade (733). A rotating block (735) is fixedly installed at the end of the blade (733) away from the rotating rod (739). The rotating block (735) is rotatably installed in the rotating hole opened on the outer wall of the inner support (72).

3. A fan according to claim 1, characterized in that: Several guide grooves (711) are provided on the inner wall surface of the outer shell (71) near the wind baffle (77), and the guide grooves (711) are connected to the air holes (712).

4. A fan according to claim 1, characterized in that: The fan head unit (30) also includes an upper cover (31) fixedly installed on the top of the lower cover (32). Side covers (33) are fixedly installed at both ends of the upper cover (31) and the lower cover (32). A support rod (36) is rotatably installed at the bottom of the lower cover (32). The support rod (36) is fixedly installed on the top of the column (20). A notch (321) is opened at one end of the lower cover (32). A top frame (37) is fixedly installed at both ends of the lower cover (32). A circuit board (371) is fixedly installed at the top of the top frame (37).

5. A fan according to claim 4, characterized in that: The fan blade rotating rod (351) has locking rods fixedly installed on both sides of its outer wall for engaging the fan blade (60). The outer wall of the fan blade rotating rod (351) away from the threaded seat (342) has an external thread (353). The external thread (353) has a fan blade nut (344) for fixing the fan blade (60) installed on its external thread. The threaded seat (342) has a rear cover nut (341) for fixing the rear cover (40) installed on its external thread.

6. A fan according to claim 5, characterized in that: The threaded seat (342) has an air collecting chamber (345) inside. A partition (343) is fixedly installed at one end of the air collecting chamber (345). Several arc-shaped air pipes (359) are fixedly installed on the outer wall surface of the fan blade rotor (351) inside the air collecting chamber (345). The arc-shaped air pipes (359) are interconnected with the air guide channel (352).

7. A fan according to claim 6, characterized in that: The exhaust structure (80) includes a hollow ring pipe (81) fixedly installed inside the rear mesh cover mounting base (34). Several air inlet pipes (82) are fixedly connected to the inner wall surface of the hollow ring pipe (81). The end of the air inlet pipe (82) away from the hollow ring pipe (81) extends into the air collection chamber (345). Several connecting branch pipes (83) are fixedly connected to the outer wall surface of the hollow ring pipe (81). A nozzle (84) is fixedly installed at one end of the connecting branch pipe (83), and the nozzle (84) surrounds the outside of the first motor (35).

8. A fan according to claim 4, characterized in that: The fan head unit (30) also includes a steering structure, which includes a second motor (38) and a third motor (39) fixedly installed inside the lower cover (32). The power output end of the second motor (38) is fixedly installed with a first gear (381). The first gear (381) is meshed with a first incomplete gear (323). One end of the first incomplete gear (323) is fixedly installed with a side plate (322). The side plate (322) is rotatably installed on one side of the inner wall of the top frame (37). The power output end of the third motor (39) is fixedly installed with a second gear (391). The second gear (391) is meshed with a second incomplete gear (361). The second incomplete gear (361) is fixedly installed outside the support rod (36).

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