Waist hanging fan and control circuit thereof

Abstract

According to the waist hanging fan and the control circuit thereof, the waist hanging fan comprises a fan body, an air outlet assembly is further arranged in the fan body, the air outlet assembly comprises a fan motor, detachably connected fan blades are arranged on the fan motor, and the fan motor is used for driving the fan blades to rotate; a fixing part and a plurality of first guide vanes are arranged on the fixing seat, the fixing part is detachably connected with a rotating shaft of the fan motor, and the first guide vanes are annularly and uniformly arranged along the central axis of the fixing seat; the air guide piece comprises an air guide head and a plurality of second guide vanes, the air guide head is located in the center of the air guide piece, and the second guide vanes are annularly and evenly arranged along the central axis of the air guide head; the pressurizing part comprises a first air gathering opening and a second air gathering opening, the first air gathering opening is connected with the side, close to the air guiding head, of the air guiding part, and the diameter of the first air gathering opening is larger than that of the second air gathering opening. According to the embodiment of the utility model, stable and concentrated air supply is realized, and the problems of dispersed wind power and poor cooling effect of a traditional waist-hanging fan are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan technical field, concretely relates to a hanging waist fan. BACKGROUND

[0002] With the growing demand of outdoor activities, outdoor work and portable heat dissipation equipment, the hanging waist fan as a kind of small portable fan, gradually be favored by the market, compared with traditional handheld fan, hanging waist fan can free both hands, it is convenient for user to obtain cooling airflow continuously when walking, working or exercising, therefore, hanging waist fan has become the portable heat dissipation equipment that user widely uses under high temperature environment, and presents the growing demand on the market.

[0003] However, the existing hanging waist fan has the following shortcomings:

[0004] 1, large volume, insufficient wind and not concentrated: part of the hanging waist fan is increased wind, adopts larger fan blade and high-power motor, leading to overall structure is heavy, inconvenient to carry, affect the comfort of user, part of the hanging waist fan is designed relatively compact, but due to the insufficient optimization of air duct, the wind is small and cannot form effective wind gathering effect, leading to the dispersion of air supply range, and the cooling effect is limited.

[0005] 2, the existing hanging waist fan mostly only has single fan function, cannot integrate other practical functions, and there is obvious deficiency in the comprehensive performance of portable equipment.

[0006] Therefore, how to ensure that the hanging waist fan is small in size while improving the wind power output and realizing accurate air supply and multifunctional integration becomes an important optimization direction of the current hanging waist fan. INVENTION CONTENTS

[0007] The utility model aims at the defects and deficiencies of prior art, provides a kind of hanging waist fan, can improve wind power output while ensuring that the hanging waist fan is small in size, and realize accurate air supply and multifunctional integration.

[0008] The technical scheme of the utility model is:

[0009] On the one hand, a kind of hanging waist fan is provided, including fan body, fan body is also provided with air outlet assembly in it, the air outlet assembly includes:

[0010] Fan motor, detachable connection fan blade is arranged on it, and the fan motor is used to drive fan blade rotation;

[0011] Fixed seat, fixed part and a plurality of first guide vanes are arranged on it, the fixed part is detachably connected with the rotating shaft of the fan motor, and a plurality of first guide vanes are evenly arranged along the central axis of the fixed seat in ring shape;

[0012] An air guide component includes an air guide head and a plurality of second guide vanes, wherein the air guide head is located in the center of the air guide component, and the plurality of second guide vanes are uniformly arranged in a ring along the central axis of the air guide head.

[0013] The pressurizing component includes a first air concentrator and a second air concentrator. The first air concentrator is connected to the side of the air guide near the air guide head, and the diameter of the first air concentrator is larger than the diameter of the second air concentrator.

[0014] Optionally, the plurality of first guide vanes, the fixing member and the fixing base are integrally formed, and the air guide member, the air guide head and the plurality of second guide vanes are integrally formed.

[0015] Optionally, the first guide vane is tilted relative to the vertical direction of the fixed base, with the tilt angle ranging from 25 degrees to 75 degrees.

[0016] Optionally, the fan body has an air outlet on the side near the second air concentrator.

[0017] Optionally, the fan body also includes a circuit board, a cigarette lighter assembly, an LED assembly, and a negative ion generator assembly. The cigarette lighter assembly, the LED assembly, and the negative ion generator assembly are electrically connected to the circuit board. The cigarette lighter assembly is used to provide a cigarette lighting function, the LED assembly is used for lighting, and the negative ion generator assembly is used to release negative ions.

[0018] Optionally, the fan body is also provided with a handle for holding objects.

[0019] Optionally, the fan body has an air inlet on at least one side.

[0020] On the other hand, this utility model also provides a fan control circuit, implemented using the waist-mounted fan as described above, including:

[0021] A voltage source is used to provide the driving voltage;

[0022] An LED driving circuit is connected to the voltage source and is used to drive the LED assembly;

[0023] A fan drive circuit, connected to the voltage source, is used to drive the fan motor;

[0024] A cigarette lighter drive circuit, connected to the voltage source, is used to drive the cigarette lighter assembly;

[0025] A negative ion driving circuit, connected to the voltage source, is used to drive the negative ion generating component;

[0026] A display circuit is used to display the power level of the voltage source;

[0027] The main control circuit is connected to and controls the voltage source, the LED driving circuit, the fan driving circuit, the cigarette lighter driving circuit, and the negative ion driving circuit, respectively.

[0028] Furthermore, the fan drive circuit includes a PWM control unit, a fan drive unit, a feedback unit, and a filtering unit. The main control circuit is connected to the PWM control unit, the fan drive unit, and the feedback unit, respectively. The fan drive unit is connected to the filtering unit, and the filtering unit is connected to the PWM control unit and the feedback unit.

[0029] The PWM control unit is used to control the fan motor speed;

[0030] The fan drive unit is used to control the fan motor switch;

[0031] The feedback unit is used to detect the operating status of the fan motor;

[0032] The filtering unit is used to stabilize the voltage source voltage.

[0033] Furthermore, the PWM control unit includes a switching transistor Q4, a resistor R20, and a resistor R21;

[0034] The fan drive unit includes a switching transistor Q3, a resistor R19, a resistor R23, a diode D2, and a fan interface FAN;

[0035] The feedback unit includes resistor R18, resistor R22, and capacitor C23;

[0036] The filter unit includes inductor L4, inductor L5, diode D1, capacitors C14, C15, C17, C18, C19, C20, and C21, and resistors R16 and R17; wherein:

[0037] One end of resistor R21 is connected to the PWM control terminal of the main control circuit, and the other end is connected to one end of resistor R20 and the gate of the switching transistor Q4. The other end of resistor R20 is grounded, the source of the switching transistor Q4 is grounded, and the drain of the switching transistor Q4 is grounded through resistor R16 and capacitor C14. The drain of the switching transistor Q4 is also connected to one end of inductor L4 and inductor L5. The other end of inductor L4 is connected to the voltage source and grounded through capacitor C20. The other end of inductor L5 is connected to the anode of diode D1 and one end of capacitor C15. The other end of capacitor C15 is connected through resistor R17 to one end of capacitor C21, one end of capacitor C17, one end of capacitor C18, one end of capacitor C19, the cathode of diode D2, and the wind... The second end of the fan interface FAN, the cathode of the diode D1, and one end of the resistor R18, the other ends of the capacitors C21, C17, and C18 are respectively grounded. The other end of the capacitor C19 is connected to the anode of the diode D2, the first end of the fan interface FAN, and the drain of the switching transistor Q3. The gate of the switching transistor Q3 is connected to one end of the resistor R19 and one end of the resistor R23. The other end of the resistor R19 is connected to the fan control terminal of the main control circuit. The other end of the resistor R23 is connected to the source of the switching transistor Q3 and the ground terminal. The other end of the resistor R18 is connected to one end of the resistor R22, one end of the capacitor C23, and the feedback terminal of the main control circuit. The other end of the resistor R22 is connected to the other end of the capacitor C23 and the ground terminal.

[0038] 1. Compared with the prior art, the present invention provides a first guide vane on the fixed base, which reduces turbulence in the airflow before it enters the air guide component, thereby improving the utilization rate of wind energy; by providing an air guide head and a second guide vane on the air guide component, the airflow is further sorted through the annular and uniformly distributed guide structure, so as to achieve stable and concentrated air delivery and avoid the problems of dispersed airflow and poor cooling effect of traditional waist-mounted fans.

[0039] 2. The present invention forms a contraction air duct through the first air concentrator and the second air concentrator, which further increases the wind speed and greatly improves the long-distance air delivery capability, overcoming the problem of insufficient wind power caused by unreasonable air duct design in existing small fans. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is an exploded view of an embodiment of the present utility model;

[0042] Figure 2 This is a structural schematic diagram of an embodiment of the present utility model;

[0043] Figure 3 This is a structural schematic diagram from another perspective of an embodiment of the present utility model;

[0044] Figure 4 This is a partial structural schematic diagram of an embodiment of the present utility model;

[0045] Figure 5 This is a schematic diagram of the air outlet component of this utility model;

[0046] Figure 6 This is a schematic diagram of the fan control circuit of this utility model;

[0047] Figure 7 This is the circuit diagram of the fan drive circuit of this utility model;

[0048] Figure 8 This is the circuit diagram of the LED driver circuit of this utility model;

[0049] Figure 9 This is a circuit diagram of the negative ion driving circuit of this utility model;

[0050] Figure 10 This is the circuit diagram of the main control circuit of this utility model;

[0051] Figure 11 This is a circuit diagram of the voltage source, cigarette lighter drive circuit, display circuit, fan switch button circuit, and interface circuit of this utility model.

[0052] Figure label:

[0053] 1. Fan body; 11. Air outlet; 12. Air inlet; 13. Handle; 14. Battery;

[0054] 2. Air outlet assembly;

[0055] 21. Fan motor; 211. Fan blades;

[0056] 22. Fixing base; 221. Fixing component; 222. First guide vane;

[0057] 23. Air guide component; 231. Air guide head; 232. Second guide vane;

[0058] 24. Pressure boosting component; 241. First air concentrator; 242. Second air concentrator;

[0059] 3. Circuit board; 4. Cigarette lighting assembly; 5. LED assembly; 6. Negative ion generator assembly; 7. External interface; 8. Button; 9. Display assembly; 10. Housing;

[0060] 100. Voltage source; 200. LED driver circuit; 300. Fan driver circuit; 310. PWM control unit; 320. Fan driver unit; 330. Feedback unit; 340. Filtering unit; 400. Cigarette lighter driver circuit; 500. Negative ion driver circuit; 600. Display circuit; 700. Main control circuit; 800. Fan switch button circuit; 900. Interface circuit. Detailed Implementation

[0061] The present invention will be further described in detail below with reference to the accompanying drawings.

[0062] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive element, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0063] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0064] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0065] Reference Figures 1-5 This utility model embodiment provides a waist-mounted fan, including a fan body 1, and an air outlet component 2 is further provided inside the fan body 1. The air outlet component 2 includes:

[0066] A fan motor 21 is provided with detachably connected fan blades 211, and the fan motor 21 is used to drive the fan blades 211 to rotate.

[0067] The fixed base 22 is provided with a fixing member 221 and a plurality of first guide vanes 222. The fixing member 221 is detachably connected to the rotating shaft of the fan motor 21. The plurality of first guide vanes 222 are evenly arranged in a ring along the central axis of the fixed base 22.

[0068] The air guide 23 includes an air guide head 231 and a plurality of second guide vanes 232. The air guide head 231 is located in the center of the air guide 23, and the plurality of second guide vanes 232 are uniformly arranged in a ring along the central axis of the air guide head 231.

[0069] The pressurizing component 24 includes a first air concentrator 241 and a second air concentrator 242. The first air concentrator 241 is connected to the side of the air guide component 23 near the air guide head 231. The diameter of the first air concentrator 241 is larger than the diameter of the second air concentrator 242.

[0070] Compared with the prior art, this utility model embodiment provides a first guide vane 222 on the fixed base 22, which reduces turbulence in the airflow before it enters the air guide 23, thereby improving the wind energy utilization rate. By providing an air guide head 231 and a second guide vane 232 on the air guide 23, the airflow is further sorted through the uniformly distributed annular guide structure, achieving stable and concentrated air delivery, thus avoiding the problems of dispersed airflow and poor cooling effect of traditional waist-mounted fans.

[0071] Furthermore, this embodiment of the invention forms a contraction air duct through the first air concentrator 241 and the second air concentrator 242, which further increases the wind speed and greatly improves the long-distance air delivery capability, overcoming the problem of insufficient wind power caused by unreasonable air duct design in existing small fans.

[0072] Optionally, the plurality of first guide vanes 222, the fixing member 221 and the fixing base 22 are integrally formed, the air guide member 23, the air guide head 231 and the plurality of second guide vanes 232 are integrally formed, which reduces component assembly error and improves structural stability. This not only reduces manufacturing cost and assembly difficulty, but also enhances the sealing of the air duct and the airflow guiding effect, making the airflow more uniform and stable and improving the air delivery efficiency.

[0073] Optionally, the first guide vane 222 is inclined relative to the vertical direction of the fixed base 22, with an inclination angle ranging from 25 degrees to 75 degrees; preferably from 40 degrees to 50 degrees, which can optimize the airflow direction, reduce turbulence, and improve airflow guidance and air delivery efficiency.

[0074] Optionally, an air outlet 11 is provided on the side of the fan body 1 near the second air concentrator 242, and an air inlet 12 is provided on at least one side of the fan body 1. This can optimize the airflow path, ensure efficient ventilation, and reduce airflow backflow losses. The air inlet 12 design can improve air intake efficiency, and the air outlet 11 enhances the directionality of airflow, making the airflow more concentrated, increasing wind pressure and wind speed, thereby improving the heat dissipation effect. In addition, the air inlet 12 is located on the front and bottom sides of the fan body 1, in directions that will not be blocked, which facilitates air intake.

[0075] Optionally, the fan body 1 also includes a circuit board 3, a cigarette lighter assembly 4, an LED assembly 5, and a negative ion generator 6. The cigarette lighter assembly 4, LED assembly 5, and negative ion generator 6 are electrically connected to the circuit board 3. The cigarette lighter assembly 4 provides cigarette lighting, the LED assembly 5 provides illumination, and the negative ion generator 6 releases negative ions. This embodiment enables the fan to not only dissipate heat but also provide additional functions such as cigarette lighting, illumination, and air purification, improving the device's practicality. The cigarette lighter assembly 4 provides rapid heating for convenient cigarette lighting; the LED assembly 5 can be used for illumination at night or in low-light environments; and the negative ion generator 6 releases negative ions to improve air quality. All components are integrated and controlled via the circuit board 3, giving the fan multi-functional expansion capabilities, enhancing the user experience, reducing the inconvenience of carrying multiple devices, and improving space utilization.

[0076] Furthermore, the fan body 1 also includes a housing 10, which is integrally formed with the fan body 1, resulting in a more robust structure and stronger protection.

[0077] Furthermore, the fan body 1 is also equipped with a battery 14, which provides independent power to the fan drive circuit 300, LED assembly 5, cigarette lighting assembly 4 and negative ion generating assembly 6.

[0078] Furthermore, this embodiment also includes an external interface 7, a button 8, and a display component 9 on the fan body 1. The external interface 7 can be used for charging, powering external devices, or data interaction. For example, it can use a Type-C or USB interface, so that the fan can be used as a portable cooling device and a power bank to power other electronic devices, thus improving the device's versatility. The button 8 is used for switching fan modes, starting and stopping the cigarette lighter function, switching on and off the LED lighting, and controlling the release of negative ions. The display component 9 can be used to display information such as battery level, fan speed, temperature, and operating mode in real time, helping users to intuitively grasp the working status of the fan and avoid running out of power or misoperation.

[0079] Optionally, the fan body 1 is also provided with a handle 13, which is used to hold an object. The handle 13 can be used to hold an object, and after the belt or pants are clamped, air can be blown upward from inside the clothes to cool the body.

[0080] refer to Figure 6 As an example, this utility model also provides a fan control circuit, implemented using the waist-mounted fan described above, comprising:

[0081] Voltage source 100 is used to provide drive voltage;

[0082] LED driving circuit 200 is connected to voltage source 100 and is used to drive LED component 5;

[0083] The fan drive circuit 300 is connected to the voltage source 100 and is used to drive the fan motor 21.

[0084] The cigarette lighter drive circuit 400 is connected to the voltage source 100 and is used to drive the cigarette lighter assembly 4.

[0085] The negative ion driving circuit 500 is connected to the voltage source 100 and is used to drive the negative ion generating component 6.

[0086] Display circuit 600 is used to display the power level of voltage source 100;

[0087] The main control circuit 700 is connected to and controls the voltage source 100, the LED driver circuit 200, the fan driver circuit 300, the cigarette lighter driver circuit 400, and the negative ion driver circuit 500, respectively.

[0088] This embodiment of the invention uses a main control circuit 700 to uniformly manage all driving circuits, achieving efficient and coordinated control. A voltage source 100 provides a stable driving voltage, LED components 5 provide illumination, a negative ion component improves air quality, a cigarette lighter component 4 enhances portability, and a display circuit 600 visualizes the operating status.

[0089] refer to Figure 7 Furthermore, the fan drive circuit 300 includes a PWM control unit 310, a fan drive unit 320, a feedback unit 330, and a filter unit 340. The main control circuit 700 is connected to the PWM control unit 310, the fan drive unit 320, and the feedback unit 330. The fan drive unit 320 is connected to the filter unit 340, and the filter unit 340 is connected to the PWM control unit 310 and the feedback unit 330.

[0090] The PWM control unit 310 is used to control the speed of the fan motor 21;

[0091] The fan drive unit 320 is used to control the switching of the fan motor 21;

[0092] The feedback unit 330 is used to detect the operating status of the fan motor 21;

[0093] The filter unit 340 is used to stabilize the voltage of the voltage source 100.

[0094] Furthermore, the PWM control unit 310 includes a switching transistor Q4, a resistor R20, and a resistor R21;

[0095] The fan drive unit 320 includes a switching transistor Q3, a resistor R19, a resistor R23, a diode D2, and a fan interface FAN;

[0096] The feedback unit 330 includes resistor R18, resistor R22, and capacitor C23;

[0097] The filter unit 340 includes inductor L4, inductor L5, diode D1, capacitors C14, C15, C17, C18, C19, C20, and C21, and resistors R16 and R17; wherein:

[0098] One end of resistor R21 is connected to the PWM control terminal of the main control circuit 700, and the other end is connected to one end of resistor R20 and the gate of the switching transistor Q4. The other end of resistor R20 is grounded, the source of the switching transistor Q4 is grounded, and the drain of the switching transistor Q4 is grounded through resistor R16 and capacitor C14. The drain of the switching transistor Q4 is also connected to one end of inductor L4 and inductor L5. The other end of inductor L4 is connected to the voltage source 100 and grounded through capacitor C20. The other end of inductor L5 is connected to the anode of diode D1 and one end of capacitor C15. The other end of capacitor C15 is connected through resistor R17 to one end of capacitor C21, one end of capacitor C17, one end of capacitor C18, one end of capacitor C19, the cathode of diode D2, and the wind... The second end of the fan interface FAN, the cathode of the diode D1, and one end of the resistor R18, the other ends of the capacitors C21, C17, and C18 are respectively grounded. The other end of the capacitor C19 is connected to the anode of the diode D2, the first end of the fan interface FAN, and the drain of the switching transistor Q3. The gate of the switching transistor Q3 is connected to one end of the resistor R19 and one end of the resistor R23. The other end of the resistor R19 is connected to the fan control terminal of the main control circuit 700. The other end of the resistor R23 is connected to the source of the switching transistor Q3 and the ground terminal. The other end of the resistor R18 is connected to one end of the resistor R22, one end of the capacitor C23, and the feedback terminal of the main control circuit 700. The other end of the resistor R22 is connected to the other end of the capacitor C23 and the ground terminal.

[0099] refer to Figure 8Specifically, the LED driver circuit 200 includes filter capacitors C3 and C4 for stabilizing the input voltage; a control chip U1 (SOT23_5_QX718B) for driving the LED and providing PWM dimming functionality; a MOSFET switch Q1 for controlling the LED's on / off state as a power switch; a current-limiting resistor R1 connected to the gate of the switch Q1 to limit the drive current and prevent overshoot; a sensing resistor R2 connected to the source of the switch Q1 for current detection and feedback; and an interface J1 for connecting the LED load. In this embodiment, the PWM duty cycle is adjusted by the U1 chip to effectively control the LED brightness, reduce power consumption, and improve LED lifespan. Filter capacitors C3 and C4 reduce power supply noise, improve power supply stability, and ensure stable LED operation under different voltage conditions.

[0100] refer to Figure 9 Specifically, the negative ion driving circuit 500 includes a negative ion generator interface J5 connected to the negative ion generating component 6; a switching transistor Q2 for controlling the on / off state of the negative ion generating component 6; a current-limiting resistor R3 to prevent excessive current from impacting the switching transistor Q2; a pull-down resistor R4 to ensure that the switching transistor Q2 is in the off state when there is no signal input; and an ANION_ON / OFF signal port for controlling the start and stop of the negative ion generating component 6. This embodiment achieves precise switching control of the negative ion generating component 6 through the ANION_ON / OFF signal port, ensuring that the negative ion generating component 6 only operates when needed, avoiding increased power consumption due to prolonged operation.

[0101] refer to Figure 11 Specifically, voltage source 100 includes power input terminal BAT+, used to provide system operating voltage; filter capacitors C1 and C2, used for power filtering; and voltage output interface J3, used to provide stable voltage to other circuits.

[0102] refer to Figure 11 Specifically, the cigarette lighter drive circuit 400 includes a control interface J2, which is used to receive control signals and enable or disable the cigarette lighting function.

[0103] refer to Figure 11 Specifically, the display circuit 600 includes an LED display module LED1 KY-2011_188 and multiple signal output terminals LED_1.1, LED_2.2, LED_3.3, LED_4.4, and LED_5.5.

[0104] refer to Figure 11 Specifically, the fan switch button circuit 800 includes buttons SW1 and SW-4P, used for users to manually control the fan's on / off state or mode switching; a current-limiting resistor R5 to prevent signal jitter or excessive current from causing false triggering; and a FAN_KEY signal line, connected to the main control circuit 700, used to transmit button input signals.

[0105] refer to Figure 11 Specifically, the interface circuit 900 includes a J6 interface, which is used for data communication and control signal exchange with external modules, or for power exchange with external modules.

[0106] refer to Figure 10 Specifically, the main control circuit 700 includes a microcontroller of model TSSOP20-CA51F005, which has PWM control, I2C communication, ADC sampling, SPI interface and multi-functional GPIO pins. The main control circuit 700 is responsible for controlling modules such as fan, LED, negative ion generator, and cigarette lighter, and realizes user interaction through external signals. It features low power consumption, high integration and high reliability.

[0107] The above is only used to illustrate the technical solution of this utility model and not to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A waist-mounted fan, comprising a fan body (1), characterized in that, The fan body (1) is further provided with an air outlet assembly (2), which includes: A fan motor (21) is provided with detachably connected fan blades (211), and the fan motor (21) is used to drive the fan blades (211) to rotate; A fixed base (22) is provided with a fixing member (221) and a plurality of first guide vanes (222). The fixing member (221) is detachably connected to the rotating shaft of the fan motor (21). The plurality of first guide vanes (222) are evenly arranged in a ring along the central axis of the fixed base (22). The air guide (23) includes an air guide head (231) and a plurality of second guide vanes (232). The air guide head (231) is located in the center of the air guide (23), and the plurality of second guide vanes (232) are uniformly arranged in a ring along the central axis of the air guide head (231). The pressurizing component (24) includes a first air concentrator (241) and a second air concentrator (242). The first air concentrator (241) is connected to the side of the air guide component (23) near the air guide head (231). The diameter of the first air concentrator (241) is larger than the diameter of the second air concentrator (242).

2. The waist-mounted fan according to claim 1, characterized in that, Multiple first guide vanes (222), the fixing member (221) and the fixing base (22) are integrally formed, and the air guide member (23), the air guide head (231) and multiple second guide vanes (232) are integrally formed.

3. The waist-mounted fan according to claim 1, characterized in that, The first guide vane (222) is inclined relative to the vertical direction of the fixed base (22), and the inclination angle ranges from 25 degrees to 75 degrees.

4. The waist-mounted fan according to claim 1, characterized in that, The fan body (1) has an air outlet (11) on the side near the second air concentrator (242).

5. The waist-mounted fan according to any one of claims 1-4, characterized in that, The fan body (1) is also provided with a circuit board (3), a cigarette lighter assembly (4), an LED assembly (5) and a negative ion generating assembly (6). The cigarette lighter assembly (4), the LED assembly (5) and the negative ion generating assembly (6) are electrically connected to the circuit board (3). The cigarette lighter assembly (4) is used to provide a cigarette lighting function, the LED assembly (5) is used for lighting, and the negative ion generating assembly (6) is used to release negative ions.

6. The waist-mounted fan according to any one of claims 1-4, characterized in that, The fan body (1) is also provided with a handle (13), which is used to hold objects.

7. The waist-mounted fan according to claim 4, characterized in that, The fan body (1) has an air inlet (12) on at least one side.

8. A fan control circuit, implemented using a waist-mounted fan as described in any one of claims 1-7, characterized in that, include: Voltage source (100) is used to provide drive voltage; An LED driving circuit (200) is connected to the voltage source (100) and is used to drive the LED assembly (5); A fan drive circuit (300) is connected to the voltage source (100) and is used to drive the fan motor (21); A cigarette lighter drive circuit (400) is connected to the voltage source (100) and is used to drive the cigarette lighter assembly (4); A negative ion driving circuit (500) is connected to the voltage source (100) and is used to drive the negative ion generating component (6); Display circuit (600) for displaying the power of the voltage source (100); The main control circuit (700) is connected to and controls the voltage source (100), the LED driving circuit (200), the fan driving circuit (300), the cigarette lighter driving circuit (400), and the negative ion driving circuit (500), respectively.

9. The fan control circuit according to claim 8, characterized in that, The fan drive circuit (300) includes a PWM control unit (310), a fan drive unit (320), a feedback unit (330), and a filter unit (340). The main control circuit (700) is connected to the PWM control unit (310), the fan drive unit (320), and the feedback unit (330). The fan drive unit (320) is connected to the filter unit (340), and the filter unit (340) is connected to the PWM control unit (310) and the feedback unit (330). The PWM control unit (310) is used to control the speed of the fan motor (21); The fan drive unit (320) is used to control the switching of the fan motor (21); The feedback unit (330) is used to detect the operating status of the fan motor (21); The filter unit (340) is used to stabilize the voltage of the voltage source (100).

10. The fan control circuit according to claim 9, characterized in that: The PWM control unit (310) includes a switching transistor Q4, a resistor R20, and a resistor R21; The fan drive unit (320) includes a switching transistor Q3, a resistor R19, a resistor R23, a diode D2, and a fan interface FAN; The feedback unit (330) includes resistor R18, resistor R22, and capacitor C23; The filter unit (340) includes inductor L4, inductor L5, diode D1, capacitors C14, C15, C17, C18, C19, C20, and C21, and resistors R16 and R17; wherein: One end of resistor R21 is connected to the PWM control terminal of the main control circuit (700), and the other end is connected to one end of resistor R20 and the gate of the switching transistor Q4. The other end of resistor R20 is grounded, the source of the switching transistor Q4 is grounded, and the drain of the switching transistor Q4 is grounded through resistor R16 and capacitor C14. The drain of the switching transistor Q4 is also connected to one end of inductor L4 and inductor L5. The other end of inductor L4 is connected to the voltage source (100) and grounded through capacitor C20. The other end of inductor L5 is connected to the anode of diode D1 and one end of capacitor C15. The other end of capacitor C15 is connected through resistor R17 to one end of capacitor C21, one end of capacitor C17, one end of capacitor C18, one end of capacitor C19, the cathode of diode D2, and the wind... The second end of the fan interface FAN, the cathode of the diode D1, and one end of the resistor R18, the other ends of the capacitors C21, C17, and C18 are respectively grounded, the other end of the capacitor C19 is connected to the anode of the diode D2, the first end of the fan interface FAN, and the drain of the switching transistor Q3, the gate of the switching transistor Q3 is connected to one end of the resistor R19 and one end of the resistor R23, the other end of the resistor R19 is connected to the fan control terminal of the main control circuit (700), the other end of the resistor R23 is connected to the source of the switching transistor Q3 and the ground terminal; the other end of the resistor R18 is connected to one end of the resistor R22, one end of the capacitor C23, and the feedback terminal of the main control circuit (700), the other end of the resistor R22 is connected to the other end of the capacitor C23 and the ground terminal.

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