Fan

Abstract

The invention provides a fan which is used for blowing air to a target object and comprises a fan body and an air changing assembly. The fan body is used for outputting constant-speed airflow, the variable-air assembly is arranged on the fan body, the variable-air assembly is used for changing the flow speed of the constant-speed airflow according to the distance between a target object and the fan body, and the variable-air assembly comprises a first sensing piece, a variable air cover and a controller. The first sensing piece is used for obtaining distance information between a target object and the fan body. The variable air outlet cover is arranged on the fan body and provided with an opening with the variable size, and constant-speed airflow output by the fan body passes through the opening. The controller is electrically connected with the first sensing piece to obtain the distance information. The controller is electrically connected with the variable fan cover and adjusts the size of the opening according to the distance information. According to the fan, the air outlet speed can be adjusted according to the distance.

Description

Technical Field

[0001] This application relates to the technical field of electrical equipment, and particularly to a fan. Background Art

[0002] As a commonly used device for heat dissipation and providing comfortable cold air, fans are widely used in various environments. Its main working principle is to use electromagnetic conversion to drive the rotation of the fan blades. Along with the rapid rotation of the blades, a large amount of air is inhaled and pushed out, forming an air current to achieve the purpose of cooling or ventilation.

[0003] In traditional fans, in addition to the rotation of the fan blades, there is usually also a function of swinging left and right, so that the direction of the wind can periodically change within a certain range, thereby expanding the area affected by the fan on the environment. This left - right swinging function is regular and cannot be adjusted for a specific direction. In addition, the air volume of the fan, that is, the intensity or speed of the wind, is usually manually adjusted by a switch or a knob, and it is difficult to flexibly adapt to different application scenarios. Summary of the Invention

[0004] In view of the above situation, this application provides a fan that can intelligently adjust the air volume and direction, providing a more user - friendly and comfortable usage experience.

[0005] A fan for blowing air on a target object includes a fan main body and a variable - wind component. The fan main body is used to output a constant - speed air current. The variable - wind component is arranged on the fan main body. The variable - wind component is used to change the flow rate of the constant - speed air current according to the distance between the target object and the fan main body. The variable - wind component includes a first sensing member, a variable air outlet cover, and a controller. The first sensing member is used to obtain the distance information between the target object and the fan main body. The variable air outlet cover is arranged on the fan main body. The variable air outlet cover has an opening with variable size, and the constant - speed air current output by the fan main body passes through the opening. The controller is electrically connected to the first sensing member to obtain the distance information, and the controller is electrically connected to the variable air outlet cover and adjusts the size of the opening according to the distance information.

[0006] In some possible embodiments, the controller is preset with a first instruction and a second instruction. When the first sensing member measures that the distance between the target object and the fan main body becomes larger, the controller sends the first instruction to the variable air duct. The variable air duct reduces the opening of the variable air duct according to the first instruction, so that the flow rate of the constant-speed air flow flowing through the opening increases. When the first sensing member measures that the distance between the target object and the fan main body becomes smaller, the controller sends the second instruction to the variable air duct. The variable air duct enlarges the opening of the variable air duct according to the second instruction, so that the flow rate of the constant-speed air flow flowing through the opening decreases.

[0007] In some possible embodiments, the fan main body includes a base, a support column, a first driving member, and a fan blade assembly. The support column is disposed on one side of the base. The first driving member is disposed at an end of the support column away from the base. The fan blade assembly is disposed on the first driving member and is in transmission connection with the first driving member. The first driving member is used to drive the fan blade assembly to rotate, so as to output the constant-speed air flow.

[0008] In some possible embodiments, the base includes a bottom plate, a top plate, and a plurality of connecting plates connected between the bottom plate and the top plate. The support column is disposed on the top plate. A groove is recessed at the connection between the connecting plate and the top plate, and part of the first sensing member is exposed in the groove.

[0009] In some possible embodiments, the fan blade assembly includes a fan base and a plurality of fan blades connected to the fan base. The center of the fan base is connected to the transmission shaft of the first driving member.

[0010] In some possible embodiments, the variable air outlet duct includes an assembly ring, a plurality of first blades, a plurality of second blades, and a second driving member. The assembly ring has a center. One end of the first blade is rotatably connected to the assembly ring, so that the other end of the first blade can approach or move away from the center. One end of the second blade is fixedly connected to the assembly ring. The second blades and the first blades are alternately arranged, and adjacent first blades and second blades partially overlap. The ends of the plurality of first blades away from the assembly ring and the ends of the plurality of second blades away from the assembly ring enclose to form the opening of the variable air outlet duct. The second driving member is in transmission connection with each first blade to drive the first blade to rotate. The controller is electrically connected to the second driving member.

[0011] In some possible embodiments, the variable air outlet duct further includes a transmission ring and a plurality of transmission rods. Each transmission rod is movably connected between the transmission ring and a first blade. The second driving member is in transmission connection with the transmission ring to drive the transmission ring to rotate.

[0012] In some possible embodiments, the first sensing member includes a transmitting end, a receiving end, and an electronic control unit. The transmitting end and the receiving end are exposed in the groove, and the electronic control unit is disposed in the base. The transmitting end is configured to emit an infrared laser toward the target object, the receiving end is configured to receive the infrared laser reflected by the target object, and the electronic control unit is configured to obtain the distance information based on the time difference between the emission and reception of the infrared laser.

[0013] In some possible embodiments, the fan further includes a second sensing member. The second sensing member is disposed on the base and exposed in the groove. The second sensing member is electrically connected to the controller. The second sensing member is configured to obtain a judgment result as to whether the target object is a human, and the controller adjusts the size of the variable outlet based on the judgment result obtained by the second sensing member.

[0014] In some possible embodiments, the first driving member is rotatably disposed at an end of the support column. The second sensing member can also sense the orientation of the target object. The fan further includes a steering assembly. The steering assembly includes a third driving member and a transmission member. The third driving member is fixed to the support column, and the transmission member is in transmission connection with the power output shaft of the third driving member and the housing of the first driving member. The third driving member is electrically connected to the controller.

[0015] The fan provided in this application adjusts the size of the opening according to the distance between the fan main body and the target object by providing a variable air flow component. The variable air flow component includes a first sensing member, a variable air outlet cover, and a controller. The first sensing member is configured to obtain the distance information between the target object and the fan main body. The variable air outlet cover is disposed on the fan main body, and the variable air outlet cover has an opening with a variable size. The constant-speed air flow output by the fan main body passes through the opening. The controller is electrically connected to the first sensing member to obtain the distance information, and the controller is electrically connected to the variable air outlet cover and adjusts the size of the opening based on the distance information. In this way, the above-mentioned fan can adjust the wind speed according to the distance of the target object. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of a fan provided in an embodiment of this application.

[0017] Figure 2 is Figure 1 Another perspective schematic diagram of the fan shown.

[0018] Figure 3 is Figure 1 Schematic diagram when the opening of the variable air outlet cover of the fan shown becomes smaller.

[0019] Figure 4 Schematic diagram when the opening of the variable air outlet cover of the fan shown in Figure 1 becomes larger. Figure 1

[0020] Description of main component symbols

[0021] Fan 100

[0022] Fan body 10

[0023] Base 11

[0024] Bottom plate 111

[0025] Top plate 112

[0026] Connecting plate 113

[0027] Support column 12

[0028] First driving part 13

[0029] Fan blade assembly 14

[0030] Fan seat 141

[0031] Fan blade 142

[0032] Variable air component 20

[0033] Air inlet cover 21

[0034] Frame 211

[0035] Spoke 212

[0036] Variable air outlet cover 22

[0037] Assembly ring 221

[0038] First blade 222

[0039] Second blade 223

[0040] Second driving part 224

[0041] Drive ring 225

[0042] Drive rod 226

[0043] First sensing part 23

[0044] Transmitting end 231

[0045] Receiving end 232

[0046] Electric control unit 233

[0047] Controller 24

[0048] Accommodation space 25​

[0049] The second sensing member 30

[0050] The steering assembly 40

[0051] The third driving member 41

[0052] The transmission member 42

[0053] The center P Specific embodiments:

[0054] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments.

[0055] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a middle element at the same time. When an element is considered to be "disposed on" another element, it can be directly disposed on the other element or there may be a middle element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the description of this application herein are only for the purpose of describing specific embodiments, and are not intended to limit this application. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0057] Please refer to Figure 1 and Figure 2 , an embodiment of the present application provides a fan 100 for realizing air supply to a target object (not labeled). Among them, the target object is a person. It can be understood that in other embodiments of the present application, the target object can also be livestock, pets, etc.

[0058] The fan 100 includes a fan main body 10 and a variable air component 20 disposed on the fan main body 10. The fan main body 10 can be used to output a constant-speed air flow, and the variable air component 20 can adaptively change the flow rate of the constant-speed air flow output by the fan main body 10 according to the distance between the target object and the fan main body 10.

[0059] The fan body 10 includes a base 11, a support column 12, a first driving member 13, and a fan blade assembly 14. The support column 12 is disposed substantially vertically on the top of the base 11. The first driving member 13 is disposed at one end of the support column 12 away from the base 11. The fan blade assembly 14 is disposed on the first driving member 13 and is in transmission connection with the first driving member 13. The first driving member 13 drives the fan blade assembly 14 to rotate, thereby outputting a constant-speed air flow. Among them, the first driving member 13 is an AC motor.

[0060] Please also refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the variable air flow component 20 includes an air inlet hood 21, a variable air outlet hood 22, a first sensing member 23, and a controller 24. The first sensing member 23 is disposed on the base 11 and is electrically connected to the controller 24. The controller 24 is electrically connected to the variable air outlet hood 22. The variable air outlet hood 22 covers the periphery of the air inlet hood 21, thereby forming a receiving space 25. The fan blade assembly 14 is rotatably received in the receiving space 25. Among them, the first sensing member 23 is used to obtain the distance information between the target object and the fan body 10. The controller 24 controls the opening size of the variable air outlet hood 22 according to the distance information, thereby realizing the adjustment and control of the air flow speed. Among them, the variable air outlet hood 22 is a movable nozzle, the first sensing member 23 is a time-of-flight camera, and the controller 24 is a programmable logic controller.

[0061] Specifically, on the premise of keeping the rotation speed of the fan blade assembly 14 unchanged, when the first sensing member 23 measures that the distance between the target object and the fan main body 10 becomes larger, the controller 24 sends a first instruction to the variable air outlet cover 22 to make the opening smaller. The variable air outlet cover 22 receives this first instruction and acts to reduce the opening of the variable air outlet cover 22, so that the air flow rate passing through the opening of the variable air outlet cover 22 increases, so that the target object with a larger distance from the fan main body 10 can also feel a constant wind intensity. In addition, when the first sensing member 23 senses that the distance between the target object and the fan main body 10 becomes smaller, the controller 24 sends a second instruction to the variable air outlet cover 22 to make the opening larger. The variable air outlet cover 22 receives this second instruction and acts to expand the opening of the variable air outlet cover 22, thereby reducing the air flow rate passing through the opening of the variable air outlet cover 22, so that the target object with a smaller distance from the fan main body 10 can also feel a constant wind intensity. Among them, the flow rate is defined as the volume of gas passing through the opening of the variable air outlet cover 22 per unit time. The wind intensity is defined as the pressure of gas acting on the unit area of the target object.

[0062] Please refer to Figure 1 and Figure 2 , in this embodiment, the base 11 is generally rectangular parallelepiped-shaped, and the base 11 includes a bottom plate 111, a top plate 112, and a plurality of connecting plates 113 connected between the bottom plate 111 and the top plate 112. Chamfering is performed at the connection positions of the connecting plates 113 with the bottom plate 111 and the top plate 112, so that the connecting plates 113 are smoothly connected to the bottom plate 111 and the top plate 112. The base 11 is provided with a groove 114, and the groove 114 is provided at the connection position of the top plate 112 and the connecting plates 113, and the groove 114 can be used to expose the first sensing member 23.

[0063] Please refer to Figure 1 and Figure 2 , in this embodiment, the fan blade assembly 14 includes a fan base 141 and a plurality of fan blades 142. The fan base 141 is generally cylindrical, and a plurality of the fan blades 142 are arranged at intervals on the outer edge of the fan base 141. The central area of the fan base 141 is connected to the transmission shaft of the first driving member 13, so as to drive the plurality of fan blades 142 to rotate and compress air, thereby generating a constant-speed air flow. Among them, the number of the fan blades 142 is five. The five fan blades 142 are arranged outside the fan base 141.

[0064] Please refer to Figure 1 and Figure 2In the present embodiment, the air inlet cover 21 is roughly disc-shaped, and the air inlet cover 21 includes a frame 211 and a plurality of spokes 212. The plurality of spokes 212 are connected to the inner side of the frame 211 at intervals along the radial direction of the frame 211, and the end of the spoke 212 away from the frame 211 is connected to the outer shell of the first driving member 13. The air inlet cover 21 is used to prevent dust from entering the accommodating space 25 to keep it clean, and at the same time prevent children or pets from accidentally touching and getting injured. It can be understood that in other embodiments of the present application, the shapes and sizes of the air inlet cover 21 vary to accommodate various types of electric fans. For example, some air inlet covers 21 are all-inclusive and can completely cover the fan blade assembly 14, while others only cover the upper or lower part of the fan blade assembly 14.

[0065] In this embodiment, the variable air outlet cover 22 includes an assembly ring 221, a plurality of first blades 222, a plurality of second blades 223, and a plurality of second driving members 224. The assembly ring 221 is defined to have a central axis P. One end of the first blade 222 is rotatably connected to the assembly ring 221, so that the other end of the first blade 222 can be close to or away from the central axis P. One end of the second blade 223 is fixedly connected to the assembly ring 221. The second blade 223 is alternately arranged with the first blade 222, and the adjacent first blades 222 and the second blade 223 partially overlap. In this way, the ends of the plurality of first blades 222 away from the assembly ring 221 and the ends of the plurality of second blades 223 away from the assembly ring 221 surround the opening of the variable air outlet cover 22. The second driving member 224 is transmission-connected to each of the first blades 222, thereby driving the first blade 222 to rotate. The controller 24 is electrically connected to the second driving member 224, thereby realizing the control of the second driving member 224. Wherein, the second driving member 224 is a stepping motor.

[0066] Specifically, see Figure 3 When the controller 24 controls the second driving member 224 to push the plurality of first blades 222 toward the central axis P, the overlapped portion of the end of the first blade 222 away from the assembly ring 221 and the end of the second blade 223 away from the assembly ring 221 increases, thereby making the opening of the variable air outlet cover 22 smaller. Figure 4 When the controller 24 controls the second driving member 224 to push the plurality of first blades 222 to move away from the central axis P, the overlapping portion between the end of the first blade 222 away from the assembly ring 221 and the end of the second blade 223 away from the assembly ring 221 is reduced, thereby enlarging the opening of the variable air outlet cover 22.

[0067] See also Figure 3and Figure 4 In this embodiment, the variable air outlet hood 22 further includes a transmission ring 225 and a plurality of transmission rods 226. The transmission ring 225 is disposed substantially parallel and spaced apart from the assembly ring 221. Each transmission rod 226 is movably connected between the transmission ring 225 and one of the first blades 222. The second driving member 224 is drivingly connected to the transmission ring 225 to drive the transmission ring 225 to rotate. During the rotation of the transmission ring 225, the first blade 222 is driven, so that the first blade 222 rotates toward or away from the central axis P. It can be understood that in other embodiments of the present application, the second driving member 224 may also drive the plurality of first blades 222 in other ways, for example, hinges, etc.

[0068] Please refer to Figure 1 and Figure 2 In this embodiment, the first sensing member 23 is a depth camera module, and the depth camera module includes a transmitting end 231, a receiving end 232, and an electronic control unit 233. The transmitting end 231 and the receiving end 232 are exposed on the base 11. The electronic control unit 233 is disposed within the base 11. The transmitting end 231 is configured to emit infrared laser light toward the target object, the receiving end 232 is configured to receive the infrared laser light reflected by the target object, and the electronic control unit 233 is configured to obtain the distance information based on the time difference between the emission and reception of the infrared laser light. Specifically, the electronic control unit 233 is composed of three parts: an input circuit, a microcomputer, and an output circuit. Among them, the input circuit receives the signals input by the transmitting end 231 and the receiving end 232, filters and amplifies the signals, and then converts them into an input level of a certain voltage. Both analog signals and digital signals are sent to the input circuit of the electronic control unit 233, and the analog-to-digital converter therein can convert the analog signal into a digital signal and then transmit it to the microcomputer for processing.

[0069] In this embodiment, the fan 100 further includes a second sensing member 30. The second sensing member 30 is disposed on the base 11 and is exposed in the groove 114. The second sensing member 30 is electrically connected to the controller 24. The second sensing member 30 is configured to obtain a judgment result as to whether the target object is a human, and the controller 24 adjusts the size of the variable outlet according to the judgment result of the second sensing member 30. Specifically, the second sensing member 30 is an infrared camera. When a human approaches the fan 100, since the human body emits infrared light. The infrared camera can capture this infrared light and determine whether the target object is a human based on the characteristics of the infrared light. For example, the infrared camera can detect information such as the heat distribution and movement trajectory of the human body, so as to determine whether the target object is a human.

[0070] Specifically, the controller 24 adjusts the size of the opening of the variable air outlet hood 22 according to the judgment structure of the infrared camera. Specifically, when the infrared camera determines that the target is a human, the controller 24 can control the opening of the variable outlet to increase, so as to better provide cool air for humans. On the contrary, when the infrared camera determines that the target is not a human (for example, a pet or other object), the controller 24 can control the opening of the variable air outlet hood 22 to decrease, so as to save energy and reduce noise.

[0071] Please refer to Figure 2 , in this embodiment, the fan 100 further includes a steering component 40. The first driving member 13 is rotatably disposed at an end of the support column 12. The steering component 40 is used to control the rotation of the first driving member 13. Specifically, the steering component 40 includes a third driving member 41 and a transmission member 42. The third driving member 41 is fixed to the support column 12, and the transmission member 42 is in transmission connection with the power output shaft of the third driving member 41 and the housing of the first driving member 13. The third driving member 41 is electrically connected to the controller 24, and the second sensing member 30 can also sense the orientation of the target. Among them, the third driving member 41 is a stepping motor, and the transmission member 42 is a gear set.

[0072] Specifically, when the second sensing member 30 measures that the target is located in a certain orientation, the third driving member 41 drives the first driving member 13 to rotate, so that the fan blade assembly 14 connected to the first driving member 13 blows air toward the target located in the orientation. In this way, the orientation tracking air supply to the target is realized.

[0073] The above embodiments are only used to illustrate the technical solutions of the present application and not to limit them. Although the present application has been described in detail with reference to the above preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A fan for blowing air on a target object, characterized in that, Comprising: A fan main body for outputting a constant-speed air flow, and A variable air flow component disposed on the fan main body for changing the flow rate of the constant-speed air flow according to the distance between the target object and the fan main body. The variable air flow component includes: A first sensing member for obtaining the distance information between the target object and the fan main body; A variable air outlet cover disposed on the fan main body, the variable air outlet cover having an opening with variable size, and the constant-speed air flow output by the fan main body passes through the opening, and A controller electrically connected to the first sensing member to obtain the distance information, and the controller is electrically connected to the variable air flow cover and adjusts the size of the opening according to the distance information.

2. The fan according to claim 1, wherein The controller is preset with a first instruction and a second instruction. When the first sensing member measures that the distance between the target object and the fan main body becomes larger, the controller sends the first instruction to the variable air flow cover, and the variable air flow cover reduces the opening of the variable air flow cover according to the first instruction, so that the flow rate of the constant-speed air flow passing through the opening increases. When the first sensing member measures that the distance between the target object and the fan main body becomes smaller, the controller sends the second instruction to the variable air flow cover, and the variable air flow cover enlarges the opening of the variable air flow cover according to the second instruction, so that the flow rate of the constant-speed air flow passing through the opening decreases.

3. The fan according to claim 1, wherein, The fan main body includes a base, a support column, a first driving member, and a fan blade assembly. The support column is disposed on one side of the base. The first driving member is disposed at an end of the support column away from the base. The fan blade assembly is disposed on the first driving member and is in transmission connection with the first driving member. The first driving member is used to drive the fan blade assembly to rotate, thereby outputting the constant-speed air flow.

4. The fan according to claim 3, characterized in that, The base includes a bottom plate, a top plate, and a plurality of connecting plates connected between the bottom plate and the top plate. The support column is disposed on the top plate. A groove is recessed at the connection between the connecting plate and the top plate, and part of the first sensing member is exposed in the groove.

5. The fan according to claim 3, wherein The fan blade assembly includes a fan seat and a plurality of fan blades connected to the fan seat. The center of the fan seat is connected to the transmission shaft of the first driving member.

6. The fan according to claim 3, wherein The variable air outlet cover includes an assembly ring, a plurality of first blades, a plurality of second blades, and a second driving member. The assembly ring has a center. One end of the first blade is rotatably connected to the assembly ring, so that the other end of the first blade can approach or move away from the center. One end of the second blade is fixedly connected to the assembly ring. The second blade is alternately arranged with the first blade. Adjacent first blades and second blades partially overlap. The ends of the plurality of first blades away from the assembly ring and the ends of the plurality of second blades away from the assembly ring surround the opening of the variable air outlet cover. The second driving member is in transmission connection with each first blade to drive the first blade to rotate, and the controller is electrically connected to the second driving member.

7. The fan according to claim 6, wherein, The variable air outlet hood further includes a transmission ring and a plurality of transmission rods. Each transmission rod is movably connected between the transmission ring and one of the first blades. The second driving member is in transmission connection with the transmission ring to drive the transmission ring to rotate.

8. The fan according to claim 4, wherein, The first sensing member includes a transmitting end, a receiving end and an electronic control unit. The transmitting end and the receiving end are exposed in the groove. The electronic control unit is arranged in the base. The transmitting end is used for emitting infrared laser towards the target. The receiving end is used for receiving the infrared laser reflected by the target. The electronic control unit is used for obtaining the distance information according to the time difference between emitting and receiving the infrared laser.

9. The fan according to claim 4, wherein, The fan further includes a second sensing member. The second sensing member is arranged on the base and exposed in the groove. The second sensing member is electrically connected to the controller. The second sensing member is used for obtaining a judgment result on whether the target is a human. The controller adjusts the size of the variable outlet according to the judgment result obtained by the second sensing member.

10. The fan according to claim 9, characterized in that, The first driving member is rotatably arranged at the end of the support column. The second sensing member can also sense the orientation of the target. The fan further includes a steering assembly. The steering assembly includes a third driving member and a transmission member. The third driving member is fixed on the support column. The transmission member is in transmission connection with the power output shaft of the third driving member and the housing of the first driving member. The third driving member is electrically connected to the controller.

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