Outdoor work cooling fan and use method

Abstract

The application provides an outdoor work heatstroke prevention and cooling fan, which comprises a handle, a motor, a rotating component and a mesh cover, the handle comprises a handle grip and a handle head, the handle grip is hinged to the handle head, a rechargeable battery, a charging interface, a power switch and a first lock are arranged in the handle grip, the first lock is used for locking the handle grip and the handle head, two vertical columns are fixedly connected to the top end of the handle head, a first support and a second support are fixedly connected to the top end of the two vertical columns respectively, rotating shafts are fixed to the first support and the second support respectively, the motor is fixedly connected to the first support, the rotating component is foldably fixedly installed on the rotor of the motor, and the mesh cover can be retracted in the circumferential direction of the movement of the rotating component. The application provides an outdoor work heatstroke prevention and cooling fan using method, which is used for starting and retracting the fan. The length and volume of the whole fan are greatly reduced when the fan is retracted, the fan is convenient to store, the weight of each component is simplified, and the fan is convenient to carry and use outdoors.

Description

Technical Field

[0001] This invention relates to the field of fan technology, and in particular to an outdoor work fan for heatstroke prevention and cooling, and its usage method. Background Technology

[0002] Under high-temperature conditions, when carrying out outdoor maintenance work, inspections, and other tasks, people may experience heat exhaustion, mild heatstroke, or severe heatstroke, which can affect the health of employees.

[0003] Currently, outdoor heatstroke prevention and cooling equipment includes hats, umbrellas, and clothing. These devices either produce low wind speed and airflow, resulting in poor heatstroke prevention and cooling effects, or are too large to carry, making them suitable only for a limited number of people. Some contain cooling chemicals, making them unsuitable for long-term, convenient use. Some floor-standing heatstroke prevention and cooling devices are only suitable for a few specific environments. Some handheld fans with around 5 watts of power have low wind speed and airflow, resulting in poor heatstroke prevention and cooling effects; some small fans even feel like they are blowing hot air in high temperatures. One outdoor camping fan has 6-inch and 9-inch blades, but the fan's length, width, and thickness are all large, making it quite heavy. Only the stand is detachable to reduce its length, making it primarily intended for outdoor placement and not convenient for outdoor transport. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an outdoor heatstroke prevention and cooling fan and its usage method.

[0005] To achieve the above objectives, according to a technical solution of the present invention, an outdoor heatstroke prevention and cooling fan includes a handle, a motor, a rotating component, and a mesh cover. The handle includes a grip and a handle head, which are hinged together. The grip contains a rechargeable battery, a charging interface, a power switch, and a first latch. The first latch is used to lock the grip and the handle head. Two columns are fixedly connected to the top of the handle head. A first support and a second support are fixedly connected to the top of the two columns, respectively. A rotating shaft is fixedly fixed to the first support and the second support, respectively. The motor is fixedly connected to the first support and located between the two columns. The rotating component is foldably and fixedly mounted on the rotor of the motor. The center of the mesh cover is rotatably mounted on the rotating shaft and can retract in the circumferential direction of the rotating component's movement.

[0006] Furthermore, the rotating component includes two fan blades and a rotating part. The two ends of the rotating part are symmetrically fixed with mounting shafts. The center of the rotating part is fixedly mounted on the rotor of the motor, and the fan blades are rotatably mounted on the mounting shafts respectively.

[0007] Furthermore, the mesh cover is composed of multiple sections with different cross-sectional dimensions, forming a volute-shaped cover. Connectors are provided between the sections to extend them into a volute shape. The outermost section is fixed to the handle. Smaller sections are housed within larger sections, and the largest section houses all the other sections.

[0008] Furthermore, a second latch is provided on the handle head, which is used to lock the rotatable, most distal cover section.

[0009] Furthermore, the connector is a rope, with both ends of the rope fixed to two adjacent cover sections.

[0010] Furthermore, the connector is a series of interlocking boss-shaped buckles, which are respectively fixed to the ends of adjacent cover sections.

[0011] Furthermore, it also includes a fan base, the top of which has a first connecting hole for accommodating the handle, and the fan base also has a second connecting hole perpendicular to the first connecting hole, the second connecting hole cooperating with the handle.

[0012] Furthermore, the holes in the mesh cover are stainless steel groove-shaped holes or similar irregular holes or regular polygonal holes, with the distance between the narrow sides of the holes not exceeding 6mm.

[0013] Furthermore, the rated total voltage of the battery is in the range of 9V-36V, the diameter of the fan blade is in the range of 15cm-40cm, and the motor is a strong magnet brushless motor.

[0014] According to another technical solution of the present invention, a method for using an outdoor work heatstroke prevention and cooling fan, using the above-mentioned cooling fan, includes the following steps: When using in the upright position, place the fan base, unfold the handle and handle head into a straight line, use the first lock to fix the handle head and handle, insert the handle into the first connecting hole of the fan base to fix it, then rotate the rotatable end section around the rotating axis to unfold the mesh cover into a volute-shaped mesh cover, and use the second lock to fix the mesh cover. Turn on the power, the motor will rotate and drive the fan blades to swing and rotate, thus using the fan; When using in a horizontal position, place the fan base, bend the handle to rest against the grip, insert the grip into the second connecting hole of the fan base to secure it, and repeat the above subsequent steps to use the fan. When storing, turn off the motor's power switch to stop the motor from rotating. Open the second latch and store all the fan sections in the outermost fixed section. At this time, the fan blades are stored in the fixed section without the motor rotating. Then open the first latch and fold the handle onto the grip, reducing the volume of the entire unfolded fan to only the smallest size of the fan section, motor, handle, and grip, thus completing the storage.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The mesh cover is foldable, and the entire mesh cover is reduced to about 1 / 16 of its unfolded size when stored. The fan blades are also foldable, and the length of the folded fan blades is less than 1 / 2 of its unfolded length. At the same time, the handle is foldable, which greatly reduces the length and volume of the entire fan when stored, making it easy to store and reducing the weight of each component, making it convenient for outdoor use. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a front view of the fan in upright position according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the fan in its upright position rotated 45 degrees according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the fan in a vertical position with a mounting bracket according to an embodiment of the present invention; Figure 4 This is a front view of the fan in a horizontal position according to an embodiment of the present invention; Figure 5 This is a schematic diagram of a standless folding fan according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the fan in a vertical position with a mounting bracket according to an embodiment of the present invention; Figure 7 This is a side view of the fan without a mounting base according to an embodiment of the present invention; Figure 8 This is a right view of the fan in a horizontal position according to an embodiment of the present invention; Figure 9 This is an enlarged schematic diagram of the second locking buckle on the handle of the mesh cover according to an embodiment of the present invention; Figure 10 This is an enlarged schematic diagram of the first latch on the handle according to an embodiment of the present invention; Figure 11 This is a schematic diagram illustrating the unfolding and retraction principle when the sections of the cover are positioned and fixed by ropes according to an embodiment of the present invention; Figure 12 This is a schematic diagram illustrating the unfolding and retracting principle when the cover sections are positioned and fixed by protrusions and buckles in an embodiment of the present invention.

[0017] In the above figures: handle 11, handle head 12, charging interface 13, power switch 14, first latch 15, column 16, first support 17, second support 18, rotating shaft 19, second latch 20, display 21, speed control switch 22, motor 23, fan blade 24, rotating part 25, mounting shaft 26, mesh cover 27, cover section 28, rope 29, buckle 30, fan base 31, first connecting hole 32, second connecting hole 33. Detailed Implementation

[0018] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] This invention provides an outdoor heatstroke prevention and cooling fan, such as... Figures 1-8 As shown, the device includes a handle, a motor 23, a rotating component, and a mesh cover 27. The handle includes a grip 11 and a handle head 12, which are hinged together. The grip 11 contains a rechargeable battery, a charging interface 13, a power switch 14, and a first latch 15 for locking the grip 11 and the handle head 12. Two columns 16 are fixedly connected to the top of the handle head 12. A first support 17 and a second support 18 are fixedly connected to the top of the two columns 16, respectively. Rotating shafts 19 are fixedly fixed to the first support 17 and the second support 18, respectively. The motor 23 is fixedly connected to the first support 17 and located between the two columns 16. The rotating component is foldably and fixedly mounted on the rotor of the motor 23. The center of the mesh cover 27 is rotatably mounted on the rotating shaft 19 and can retract in the circumferential direction of the rotating component's movement.

[0020] The battery is formed by combining multiple battery cells, with a rated total voltage range of 9-36V, and the voltage value is set within the safe voltage range. The high voltage achieves low current, which not only reduces the battery's size and weight, but also reduces internal heat generation and losses, lowers the overall circuit's heat loss, and simultaneously reduces the overall circuit's weight.

[0021] The battery consists of three 21700 ternary lithium batteries connected in series, with one battery on top and two on the bottom. The rated total voltage of the battery is 11.1V, and the total capacity is about 53Wh. The power supply uses a combination of lithium batteries with high energy density in terms of mass and volume, which can increase the battery capacity of the fan and reduce the weight and size of the fan.

[0022] The battery can be a built-in battery or a pluggable battery, with a rated total voltage range of 9V-36V and a battery capacity of not less than 30Wh.

[0023] The motor 23 is a high-magnetic brushless motor 23. The maximum output power of the motor 23 is greater than 100W. Due to its small size, light weight, and high power, the high-magnetic brushless motor 23 has higher torque and lower noise and vibration, which meets the requirements of portability, high wind speed and air volume and low noise.

[0024] The maximum output power of the motor 23 is not less than 20W. The greater the power of the drive motor 23, the greater the air volume generated. The maximum output power of the motor 23 must meet the power required for the fan blades 24 to rotate at maximum speed.

[0025] Preferred, such as Figure 7 As shown, the rotating component includes two fan blades 24 and a rotating part 25. The rotating part 25 has mounting shafts 26 symmetrically fixed at both ends. The center of the rotating part 25 is fixedly mounted on the rotor of the motor 23. The fan blades 24 are rotatably mounted on the mounting shafts 26. This design facilitates the storage of the fan blades 24 and significantly reduces the volume occupied by them.

[0026] The diameter of the fan blade 24 ranges from 15cm to 40cm, with approximately 21cm being optimal. The design of the fan blade 24 needs to improve airflow and efficiency while reducing weight and noise. Drawing inspiration from the lightweight and low surface drag characteristics of existing high-volume fan blades and aircraft propeller blades, noise reduction technologies such as forward-swept and backward-swept designs can be employed, along with optimization using simulation software. Simultaneously, the power required by the fan blade 24 and the overall fan power at maximum speed must not exceed the power limits set by the program.

[0027] Preferred, such as Figures 1-9 As shown, the mesh cover 27 is composed of multiple cover sections 28 with different cross-sectional dimensions to form a volute-shaped cover. Connectors are provided between the cover sections 28 to extend the cover sections 28 into a volute shape. The end of the outermost cover section 28 is fixed to the handle head 12. Small-sized cover sections 28 are housed in large-sized cover sections 28, and the largest-sized cover section 28 houses all other cover sections 28.

[0028] Preferred, such as Figure 9 As shown, a second latch 20 is also provided on the handle 12. The second latch 20 is used to lock the rotatable, most distal cover section 28. The elastic locking pin extending from the front end of the second latch 20 engages within the hole of the smallest cover section 28 to secure the unfolded cover section 28. Pressing the second latch 20 retracts the locking pin to unlock the cover section 28, thereby allowing the mesh cover 27 to be retracted. The first latch 15 can adopt the same structure as the second latch 20, such as... Figure 10 As shown.

[0029] Since the smaller the gap between the fan blades and the guard, the greater the noise generated, the design gap between the fan blades and the guard should not be less than 5mm. At the same time, it should also meet the national standard requirements for the distance between the outer surface of the guard and the internal rotating parts. If slotted holes are used, the distance between the fan blades and the guard should not be less than 10mm.

[0030] Preferred, such as Figure 11 As shown, the connector is a rope 29, and the two ends of the rope 29 are respectively fixed to two adjacent cover sections 28.

[0031] Preferred, such as Figure 12 As shown, the connector is a series of interlocking boss-shaped buckles 30, which are respectively fixed to the ends of adjacent cover sections 28.

[0032] Preferred, such as Figure 3 , 4 As shown, it also includes a fan base 31. The top of the fan base 31 has a first connecting hole 32 for accommodating the handle 11. The fan base 31 also has a second connecting hole 33 that is perpendicular to the first connecting hole 32. The second connecting hole 33 cooperates with the handle 11. The handle 11 can be inserted vertically into the fan base 31 or horizontally into the fan base 31, so that the fan has both handheld and seated functions.

[0033] like Figures 1-6 As shown, the holes in the mesh cover 27 are stainless steel slotted holes, irregular holes similar to slots, or regular polygonal holes, with the narrow side spacing of the holes not exceeding 6mm. To reduce the obstruction of the mesh cover 27's solid area to the wind, the holes in the mesh cover 27 can also be slotted holes or regular holes similar to slots, as this allows for a larger long side. For people aged 3 and under, the maximum narrow side of the slotted holes is 6mm.

[0034] To reduce the solid air blowing area of ​​the orifice frame and the thickness of the mesh cover 27, the strength of the mesh cover 27 material should be increased. Preferably, the mesh cover 27 material is stainless steel.

[0035] Preferred, such as Figures 1-10 As shown, the handle 11 is also equipped with a display 21 and a speed control switch 22. The display 21 can show the battery level and speed setting, while the speed control switch 22 controls the fan speed. The display 21 is a digital screen with the text "Fan Speed" displayed in the upper left corner, a number display from 0 to 99 in the middle, a "Charging Complete" display in the upper right corner, and a "%" display in the lower right corner. A charging reminder is issued when the battery level is below 20%. During charging, the charging amount and a "~" symbol are displayed; when charging is complete, "Charging Complete" is displayed.

[0036] The scroll wheel serves as a speed control switch 22. A push-button switch is located below the scroll wheel. After the fan is turned on, the fan speed is displayed. Pressing the push-button switch once switches the display to show the battery level, and after t seconds, it automatically switches back to displaying the fan speed. Preferably, t is 3 seconds. Pressing the push-button switch twice consecutively turns off the display 21. Preferably, in the screen-off state, pressing the push-button switch once turns on the fan speed display.

[0037] When the fan is turned on, the motor will not rotate if the speed control switch is not reset or not operated, further improving safety. A reminder for not resetting to zero can be provided via motor sound, a display alert, or an additional audible warning from a speaker.

[0038] The charging port 13 can use charging ports such as Type-C, micro USB, Lightning, and DC interface.

[0039] The PCB board contains chips, including a motor speed control chip (23), a fast charging protocol matching chip, and a charge / discharge management chip. External circuitry is also present on the PCB board. This enables the system to perform battery charging management, discharging management, over-discharge protection, overcharge protection, overcurrent protection, short-circuit protection, and power calculation functions. It also features a display (21) for outputting reminder information.

[0040] The connections between the power supply and the fast charging circuit, as well as the charge / discharge management circuit, are all existing technologies. The power supply, charge / discharge management circuit, speed control circuit, and motor are electrically connected. When the battery voltage is higher than the charging voltage, a boost circuit is added. When the battery voltage is lower than the charging voltage, a buck circuit is added.

[0041] This invention also proposes a method for using an outdoor heatstroke prevention and cooling fan, characterized by the following steps: When using in the upright position, place the fan base 31, unfold the handle 11 and the handle head 12 into a straight line, use the first lock 15 to fix the handle head 12 and the handle 11, insert the handle 11 into the first connecting hole 32 of the fan base 31 and fix it, then rotate the rotatable end section 28 around the rotating shaft 19 to unfold the mesh cover 27 to form a volute-shaped mesh cover 27 as a whole, and use the second lock 20 to fix the mesh cover 27. Turn on the power, the motor 23 rotates and drives the fan blades 24 to swing and rotate, thus using the fan; When using in a horizontal position, place the fan base 31, bend the handle 12 against the handle 11, insert the handle 11 into the second connecting hole 33 of the fan base 31 and fix it in place. Repeat the above subsequent steps to use the fan. When storing, disconnect the power switch 14 of the motor 23, and the motor 23 stops rotating. Open the second latch 20 and store all the cover sections 28 in the outermost fixed cover section 28. At this time, the fan blades 24 are stored in the fixed cover section 28 without the motor 23 rotating. Then open the first latch 15 and fold the handle 12 onto the grip 11, so that the volume of the entire unfolded fan is reduced to the volume consisting only of the smallest size cover section 28, the motor 23, the handle 12 and the grip 11, thus completing the storage.

[0042] The beneficial effects of this invention are: the mesh cover 27 is foldable, and the volume of the entire mesh cover 27 when folded is reduced to about 1 / 16 of its unfolded size; the fan blades 24 are foldable, and the length of the entire fan blades 24 when folded is less than 1 / 2 of its unfolded length; at the same time, the handle is foldable, which greatly reduces the length and volume of the entire fan when folded, making it easy to store; the fan uses a high safety voltage, thereby reducing heat loss in the circuit and motor 23, improving battery life, and also reducing the weight of the battery, circuitry, etc., making it easy to carry and use outdoors, and further ensuring electrical safety; using large-diameter fan blades 24, when producing the same air volume, The fan speed is reduced, thereby reducing frictional resistance, noise, and vibration of the motor 23, bearings, and fan blades 24, improving fan efficiency and reducing the noise of high-power fans; by using high-energy-density batteries and increasing battery capacity, the battery life is improved and the fan is kept from being too heavy; the use of a strong-magnetic brushless motor 23 has higher torque, thereby increasing the fan's output power and enabling the fan to deliver a large air volume, while being lightweight to avoid the fan being too heavy, and also having lower noise and vibration compared to other motors of the same power; the air blowing area of ​​the mesh cover 27 is reduced, reducing airflow loss and improving fan efficiency.

[0043] Finally, 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. An outdoor cooling fan, comprising a handle, a motor, a rotating component, and a mesh cover, characterized in that, The handle includes a grip and a handle head, the grip and handle head being hinged together. The grip contains a rechargeable battery, a charging interface, a power switch, and a first latch, which is used to lock the grip and handle head. Two columns are fixedly connected to the top of the handle head, and a first support and a second support are fixedly connected to the top of the two columns, respectively. A rotating shaft is fixedly fixed to the first support and the second support, respectively. The motor is fixedly connected to the first support and located between the two columns. The rotating component is foldably and fixedly mounted on the rotor of the motor. The center of the mesh cover is rotatably mounted on the rotating shaft and can retract in the circumferential direction of the rotating component's movement.

2. The outdoor heatstroke prevention and cooling fan as described in claim 1, characterized in that, The rotating component includes two fan blades and a rotating part. The two ends of the rotating part are symmetrically fixed with mounting shafts. The center of the rotating part is fixedly mounted on the rotor of the motor. The fan blades are rotatably mounted on the mounting shafts respectively.

3. The outdoor work fan for heatstroke prevention and cooling as described in claim 2, characterized in that, The mesh cover is composed of multiple sections with different cross-sectional dimensions, forming a volute-shaped cover. Connectors are provided between the sections to extend them into a volute shape. The outermost section is fixed to the handle. Smaller sections are housed within larger sections, and the largest section houses all the other sections.

4. The outdoor work fan for heatstroke prevention and cooling as described in claim 3, characterized in that, The handle is also provided with a second latch, which is used to lock the rotatable end section.

5. The outdoor work fan for heatstroke prevention and cooling as described in claim 3, characterized in that, The connector is a rope, with its two ends fixed to two adjacent cover sections.

6. The outdoor work fan for heatstroke prevention and cooling as described in claim 3, characterized in that, The connector is a series of interlocking boss-shaped buckles, which are fixed to the ends of adjacent cover sections.

7. The outdoor work fan for heatstroke prevention and cooling as described in claim 3, characterized in that, It also includes a fan base, the top of which has a first connection hole for accommodating the handle, and the fan base also has a second connection hole that is perpendicular to the first connection hole, the second connection hole cooperating with the handle.

8. The outdoor work fan for heatstroke prevention and cooling as described in claim 3, characterized in that, The mesh cover has slotted holes in stainless steel, or irregular holes or regular polygonal holes with similar slotted shapes, and the distance between the narrow sides of the holes is no more than 6mm.

9. The outdoor work fan for heatstroke prevention and cooling as described in claim 3, characterized in that, The rechargeable battery has a rated total voltage range of 9V-36V, the fan blade diameter ranges from 15cm to 40cm, and the motor is a strong magnet brushless motor.

10. A method for using an outdoor work fan for heatstroke prevention and cooling, characterized in that, Using the cooling fan as described in any one of claims 3 to 9 includes the following steps: When using in the upright position, place the fan base, unfold the handle and handle head into a straight line, use the first lock to fix the handle head and handle, insert the handle into the first connecting hole of the fan base to fix it, then rotate the rotatable end section around the rotating axis to unfold the mesh cover into a volute-shaped mesh cover, and use the second lock to fix the mesh cover. Turn on the power, the motor will rotate and drive the fan blades to swing and rotate, thus using the fan; When using in a horizontal position, place the fan base, bend the handle to rest against the grip, insert the grip into the second connecting hole of the fan base to secure it, and repeat the above subsequent steps to use the fan. When storing, turn off the motor's power switch to stop the motor from rotating. Open the second latch and store all the fan sections in the outermost fixed section. At this time, the fan blades are stored in the fixed section without the motor rotating. Then open the first latch and fold the handle onto the grip, reducing the volume of the entire unfolded fan to only the smallest size of the fan section, motor, handle, and grip, thus completing the storage.

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