handy fan

Abstract

We provide a handy fan that achieves effective heat dissipation and improves the lifespan of the product. [Solution] The handheld fan includes a housing, the housing has a handle 11, an air passage 12 is provided inside the housing, a motor 2 is provided inside the air passage, a motor circuit board 3 is provided on the motor, and the motor circuit board is electrically connected to the motor, and a control circuit board 4 and a battery 5 are further provided inside the housing, the control circuit board is electrically connected to the motor circuit board, and the control circuit board is further electrically connected to the battery. Because the motor circuit board and the control circuit board are separated, the heat generated by the circuit board is dispersed. Furthermore, the motor circuit board is provided independently of the motor. Because the motor is provided inside the air passage, the operation of the motor drives the airflow inside the air passage to flow rapidly, and the heat inside the motor circuit board can be quickly removed. The handheld fan of this invention solves the problem of poor heat dissipation in conventional handheld fans through two aspects: heat dispersion and rapid airflow.

Description

Technical Field

[0001] The present invention relates to the field of fans, and particularly to handheld fans.

Background Art

[0002] Currently, in the market, there are handheld fans that have a relatively high rotation speed and can thereby provide relatively high wind power, and are generally called "jet fans" or "high-rotation-speed fans" in the industry. This type of handheld fan is often used in cases such as quickly cleaning and blowing dust, quickly blowing air for heat dissipation, and quickly drying. However, in the prior art, for this type of handheld fan, due to the high rotation speed of the motor, the amount of heat generated is relatively large, which causes problems such as affecting the service life of the handheld fan. Therefore, how to achieve effective heat dissipation has been a difficult problem in such products conventionally.

Summary of the Invention

[0003] In order to overcome the disadvantages of the prior art, the present invention provides a handheld fan.

[0004] The technical means adopted by the present invention to solve its technical problems are as follows: The present invention provides a handheld fan, including a housing, the housing has a handheld part, an air passage part is provided in the housing, and a motor is provided in the air passage part.

[0005] A motor circuit board is provided on the motor, and the motor circuit board is electrically connected to the motor. A control circuit board and a battery are further provided in the housing. The control circuit board is electrically connected to the motor circuit board, and the control circuit board is further electrically connected to the battery.

[0006] The control circuit board and battery are both housed within the handle portion, the air duct portion is positioned horizontally, the handle portion is positioned vertically, and the handle portion is connected to the bottom of the air duct portion, forming a T-shaped housing.

[0007] The first end of the air duct is an outlet, and the second end is an intake, thereby forming a convection structure in which the outlet and intake face each other, and protective nets are provided at both the outlet and intake.

[0008] The handheld fan further includes a first connecting wire, with a wiring hole provided at the connection point between the airflow section and the handle section. The first end of the first connecting wire is electrically connected to the control circuit board, and the second end of the first connecting wire passes through the wiring hole and is electrically connected to the motor circuit board, thereby achieving an electrical connection between the control circuit board and the motor circuit board.

[0009] A second connecting wire is provided within the handle. The first end of the second connecting wire is electrically connected to the control circuit board, and the second end of the second connecting wire is electrically connected to the battery.

[0010] A charging port is provided on the control circuit board and is used to charge the battery, and the charging port is exposed from the handle. An operation button is provided on the control circuit board and is exposed from the handle. The motor circuit board is the motor drive circuit board.

[0011] The motor circuit board is provided corresponding to the center of the motor, the motor has a rotor portion provided at the center and a stator portion provided surrounding the rotor portion, the motor circuit board is provided corresponding to the rotor portion of the motor and is attached to the stator portion of the motor, the motor circuit board is located at the front end of the rotor portion of the motor, the motor further has fan blades, the fan blades have a central connection portion and outer blade portions, the fan blades are connected to the rear end of the rotor portion of the motor at their central connection portion, the stator portion of the motor has a passage provided corresponding to the blade portions of the fan blades, the stator portion of the motor has a mounting bracket, the mounting bracket is provided corresponding to the rotor portion of the motor and is located at the front end of the rotor portion of the motor, and the motor circuit board is provided on the mounting bracket.

[0012] The mounting bracket has at least three support rods extending toward its front end, and the motor circuit board is connected to the end of each support rod, the motor circuit board includes at least three notches or grooves, the at least three notches or grooves are provided in one-to-one correspondence with the at least three support rods extending forward from the mounting bracket, the at least three support rods are configured to be inserted into the three notches or grooves on the motor circuit board, thereby connecting the motor circuit board to the mounting bracket.

[0013] An air outlet is formed at the first end of the air passage, and an air intake is formed at the second end of the air passage. The air outlet is positioned opposite the air intake, forming a convection structure in the air passage. The motor circuit board is exposed to the air within the air passage of the housing, and the space defined between the motor circuit board, the air outlet of the air passage, and the side wall of the air passage is an air gap. As a result, the heat generated during the operation of the motor circuit board can be dissipated by the airflow generated by the motor.

[0014] The beneficial effects of this invention are as follows: With the above structure installed, the motor is placed in the air passage, and the motor's operation drives the airflow in the air passage to flow rapidly, thereby quickly removing heat. This better solves the problem of poor heat dissipation in conventional handheld fans, thereby improving the lifespan of the handheld fan. [Brief explanation of the drawing]

[0015] To more clearly explain the technical concepts in the embodiments of the present invention, the following briefly introduces the drawings that may be used in the description of the embodiments. The drawings in the following description represent only a few embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without expending any creative effort.

[0016] The present invention will be further explained below, linking the drawings with examples.

[0017] [Figure 1] This is a schematic diagram of the structure of the present invention. [Figure 2] These are schematic diagrams of the structure of this invention from different angles. [Figure 3] This is an exploded schematic diagram of the present invention. [Figure 4] This is a schematic diagram of the present invention from different angles. [Figure 5] This is a cross-sectional view of the present invention. [Figure 6] This is a schematic diagram of the structure of the present invention, which has a blowing nozzle. [Figure 7] Figure 6 is a schematic diagram of the exploded view. [Figure 8] This is a schematic diagram illustrating the structure in which each component of the present invention is electrically connected. [Figure 9] This is a schematic diagram of the structure in which each component of this invention is electrically connected at different angles. [Figure 10] This is a schematic diagram of the motor circuit board and the motor structure. [Figure 11] These are schematic diagrams of the motor circuit board and motor structure from different angles. [Figure 12] It is a schematic view of the projection of the motor circuit board onto the motor.

Embodiments for Carrying Out the Invention

[0018] Referring to FIGS. 1 to 12, there is a handy fan including a housing 1. The housing 1 has a hand-held portion 11. An air passage portion 12 is provided inside the housing 1. A motor 2 is provided inside the air passage portion 12. A motor circuit board 3 is provided on the motor 2, and the motor circuit board 3 is electrically connected to the motor 2. A control circuit board 4 and a battery 5 are further provided inside the housing 1. The control circuit board 4 is electrically connected to the motor circuit board 3, and the control circuit board 4 is further electrically connected to the battery 5.

[0019] With the installation of the above structure, the motor circuit board and the control circuit board are separated inside the housing of the handy fan, and the heat generated by the circuit boards is dispersed. Moreover, the motor circuit board is provided independently of the motor. Since the motor is provided inside the air passage portion, the operation of the motor can drive the air flow inside the air passage portion to flow rapidly, and can quickly take away the heat inside the motor circuit board. Summing up the above, the handy fan of the present invention realizes effective heat dissipation through two modes of heat dispersion and rapid air flow, better solves the problem of poor heat dissipation in the conventional handy fan, and thereby improves the service life of the handy fan.

[0020] Furthermore, the motor circuit board 3 may be a drive circuit board of the motor. When the motor needs to have a relatively high rotation speed, the motor inevitably needs to achieve relatively high power, and thus the heat generated by the handy fan mainly concentrates on the motor circuit board. Therefore, the motor circuit board is provided independently of the motor, and rapid and effective heat dissipation of the motor circuit board can be ensured, and the structural design is reasonable.

[0021] Here, both the control circuit board 4 and the battery 5 are provided inside the hand-held portion 11.

[0022] Furthermore, the air passage section 12 is provided horizontally, the handle section 11 is provided vertically, and the handle section 11 is connected to the bottom of the air passage section 12, forming a T-shaped housing. The above structure makes the structural design of the handheld fan more rational and facilitates the handheld fan operation.

[0023] Furthermore, the first end of the air passage 12 is the outlet 13, and the second end of the air passage 12 is the intake 14. This forms a convection structure in the air passage 12 where the outlet 13 and the intake 14 face each other, improving the airflow and ensuring the blowing effect of the handheld fan.

[0024] Furthermore, protective nets 8 are provided at both the air outlet 13 and the air intake 14 to prevent fingers from being accidentally inserted into the air passage and coming into contact with the motor, thereby preventing accidental occurrences. The protective nets may be connected to the air outlet or air intake by screws, or they may be integrally molded with the air outlet or air intake, and are not specifically limited thereto. Furthermore, the air outlet may be further provided with a discharge nozzle 9 that can merge airflows, and the discharge nozzles may be fixed to the air outlet by magnetic attraction, screw-in method, etc., and are not specifically limited thereto.

[0025] The handheld fan further includes a first connecting wire 6, with a wiring hole 15 provided at the connection point between the airflow section 12 and the handle section 11. The first end of the first connecting wire 6 is electrically connected to the control circuit board 4, and the second end of the first connecting wire 6 passes through the wiring hole 15 and is electrically connected to the motor circuit board 3. This realizes an electrical connection between the control circuit board 4 and the motor circuit board 3, resulting in a simple structure and a rational design.

[0026] Furthermore, a second connecting wire 7 is provided within the handle portion 11. The first end of the second connecting wire 7 is electrically connected to the control circuit board 4, and the second end of the second connecting wire 7 is electrically connected to the battery 5. In the above structure, the battery can supply power to the motor via the control circuit board and the motor circuit board, and the control circuit board can also control the motor circuit board and the motor. The structure is simple and the design is rational.

[0027] Furthermore, the control circuit board 4 is provided with a charging port 41 used for charging the battery 5, and the charging port 41 is exposed from the handle portion 11.

[0028] Furthermore, an operation button 42 is provided on the control circuit board 4, and the operation button 42 is exposed from the handle 11, allowing control operations to be performed on the motor using the operation button. For example, it can be used as a switch to adjust the wind speed shift.

[0029] Here, the motor circuit board 3 is positioned corresponding to the center of the motor 2. During the motor's operation, airflow mainly occurs at the non-center of the motor. Therefore, by positioning the motor circuit board corresponding to the center of the motor, the airflow is not directly obstructed, allowing the airflow to quickly flow around the motor circuit board, thereby rapidly dissipating heat from the motor circuit board. This enables the structure to be installed while simultaneously ensuring sufficient airflow for the handheld fan, demonstrating a rational and ingenious structural design.

[0030] Furthermore, the motor 2 has a rotor portion 21 located at the center and a stator portion 22 surrounding the rotor portion 21. The motor circuit board 3 is provided corresponding to the rotor portion 21 of the motor, and the motor circuit board 3 is attached to the stator portion 22 of the motor.

[0031] Furthermore, the motor circuit board 3 is located at the front end of the motor rotor 21. In this structure, the motor circuit board does not have a connection relationship with the front end of the rotor; its relative position is simply at the front end of the motor rotor 21, which is advantageous in terms of structural layout.

[0032] Furthermore, the motor 2 further includes a fan blade 23 having a central connection portion 231 and an outer blade portion 232, and the fan blade 23 is connected to the rear end of the motor's rotor portion 21 at its central connection portion 231. During use, the motor drives the rotor portion to rotate the connection portion of the fan blade, thereby driving the blade portion of the fan blade to rotate and create airflow. In this structure, most of the airflow is generated at the position corresponding to the blade portion, i.e., at the non-center of the motor.

[0033] Furthermore, the motor's stator section 22 is provided with a flow passage 221 corresponding to the fan blade section 232, which acts as a guide for the airflow and ensures the airflow of the handheld fan. In this way, during the motor's operation, the airflow flows sequentially through the intake, flow passage, and outlet to produce the airflow of the handheld fan.

[0034] Furthermore, the stator portion 22 of the motor has a mounting bracket 222, which is provided corresponding to the rotor portion 21 of the motor and is located at the front end of the rotor portion 21 of the motor, and the motor circuit board 3 is mounted on the mounting bracket 222. Similarly, the installation of the mounting bracket does not directly obstruct the airflow and ensures the airflow of the handy fan. The mounting bracket may be integrally molded with the rotor portion, or it may be attached to the rotor portion by methods such as bonding or locking, and is not specifically limited thereto.

[0035] Furthermore, the mounting bracket 222 has at least three support rods 223 extending toward the front end, and the motor circuit board 3 is connected to the end of each support rod 223, resulting in a simple and stable structure.

[0036] In this patent, the motor 2 must have a rotational speed of 20,000 rpm or more in order to achieve the required airflow effect during actual use as a "jet fan" or "high-speed fan". In other words, the handy fan is a high-speed handy fan.

[0037] Here, the motor may be a three-phase motor, or of course, any other type of motor, as long as it can achieve the effect of high rotational speed.

[0038] Similarly, as a "jet fan" or "high-speed fan," the power of motor 2 needs to be 35W or more due to the presence of high rotational speed. In actual use, the battery output voltage is generally 7.4V, and accordingly, the current may approach 5A. Only in this case can the motor have the necessary rotational speed and actually achieve the required airflow effect. At the same time, in this case, the amount of heat generated by the motor circuit board is relatively large, so by providing the motor circuit board independently of the motor in the air passage, rapid and effective heat dissipation can be achieved. Moreover, the heat released from the motor circuit board will not affect other electronic components.

[0039] The above are one or more embodiments provided in conjunction with specific details, and it should not be assumed that the specific implementation of the present invention is limited to these descriptions. Any technical reasoning or substitutions that are similar to, identical to, or based on the concept of the present invention should all be considered within the scope of protection of the present invention.

Claims

1. A handheld fan comprising a housing (1), the housing (1) having a handle (11), an air passage (12) provided within the housing (1), and a motor (2) provided within the air passage (12).

2. A handy fan according to claim 1, wherein a motor circuit board (3) is provided on a motor (2), and the motor circuit board (3) is electrically connected to the motor (2), and a control circuit board (4) and a battery (5) are further provided inside the housing (1), the control circuit board (4) is electrically connected to the motor circuit board (3), and the control circuit board (4) is further electrically connected to the battery (5).

3. The handheld fan according to claim 2, wherein the control circuit board (4) and the battery (5) are both provided within the handle (11), the air passage (12) is provided in the horizontal direction, the handle (11) is provided in the vertical direction, and the handle (11) is connected to the bottom of the air passage (12) to form a T-shaped housing.

4. The handy fan according to claim 3, wherein the first end of the air passage (12) is an air outlet (13), and the second end of the air passage (12) is an air intake (14), thereby forming a convection structure in which the air passage (12) has an air outlet (13) and an air intake (14) facing each other, and both the air outlet (13) and the air intake (14) are provided with protective nets (8).

5. The handheld fan according to claim 3, further comprising a first connecting wire (6), wherein a wiring hole (15) is provided at the connection point between the air passage section (12) and the handheld section (11), the first end of the first connecting wire (6) is electrically connected to the control circuit board (4), and the second end of the first connecting wire (6) passes through the wiring hole (15) and is electrically connected to the motor circuit board (3), thereby achieving an electrical connection between the control circuit board (4) and the motor circuit board (3).

6. A handheld fan according to claim 1, wherein a second connecting wire (7) is provided in the handle portion (11), the first end of the second connecting wire (7) is electrically connected to a control circuit board (4), and the second end of the second connecting wire (7) is electrically connected to a battery (5).

7. The handheld fan according to claim 6, wherein a charging port (41) is provided on the control circuit board (4) and is used to charge the battery (5), and the charging port (41) is exposed from the handle (11), and an operation button (42) is provided on the control circuit board (4), and the operation button (42) is exposed from the handle (11), and the motor circuit board (3) is a motor drive circuit board.

8. The motor circuit board (3) is provided corresponding to the center of the motor (2), and the motor (2) has a rotor portion (21) provided at the center and a stator portion (22) provided surrounding the rotor portion (21), the motor circuit board (3) is provided corresponding to the rotor portion (21) of the motor and the motor circuit board (3) is attached to the stator portion (22) of the motor, the motor circuit board (3) is located at the front end of the rotor portion (21) of the motor, the motor (2) further has a fan blade (23), and the fan blade (23) has a central connecting portion (231) and an outer blade portion (232) The handy fan according to claim 2, wherein the fan blade (23) is connected to the rear end of the rotor (21) of the motor at its central connection portion (231), the stator (22) of the motor is provided with a flow passage (221) corresponding to the blade portion (232) of the fan blade, the stator (22) of the motor has a mounting bracket (222), the mounting bracket (222) is provided corresponding to the rotor (21) of the motor and is located at the front end of the rotor (21) of the motor, and the motor circuit board (3) is provided on the mounting bracket (222).

9. The handy fan according to claim 8, wherein the mounting bracket (222) has at least three support rods (223) extending toward the front end, and the motor circuit board (3) is connected to the end of each support rod (223), the motor circuit board includes at least three notches or grooves, the at least three notches or grooves are provided in one-to-one correspondence with the at least three support rods extending forward from the mounting bracket, and the at least three support rods are configured to be inserted into the three notches or grooves on the motor circuit board, thereby connecting the motor circuit board to the mounting bracket.

10. A handy fan according to any one of claims 1 to 9, wherein an air outlet is formed at the first end of the air passage, an air intake is formed at the second end of the air passage, the air outlet is provided opposite the air intake, forming a convection structure in the air passage, the motor circuit board is exposed to the air in the air passage portion of the housing, and the space defined between the motor circuit board, the air outlet of the air passage portion and the side wall of the air passage portion is an air gap, thereby allowing the heat generated during the operation of the motor circuit board to be dissipated by the airflow generated by the motor.

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