Hair dryer

Abstract

The invention discloses a hair dryer, which comprises a shell, an air inlet part and an air outlet part, a main air duct is formed between the air inlet part and the air outlet part; the fan assembly is accommodated in the shell; the circuit board assembly is electrically connected with the fan assembly to control the fan assembly; in the front-back direction, at least part of the circuit board assembly is located behind the air inlet part. And at least part of the circuit board assembly is arranged on a flowing path of airflow in the main air duct. According to the air blower, the compactness of the air blower can be improved, and the heat dissipation performance of the circuit board assembly can be improved.

Description

Technical Field

[0001] This application relates to a power tool, specifically a hair dryer. Background Technology

[0002] Power tools play a vital role in daily production and life. These tools include, but are not limited to, electric drills, impact drills, impact wrenches, impact screwdrivers, angle grinders, chainsaws, circular saws, and blowers. Electric drills and impact drills can be fitted with drill bits of different diameters to drill holes in objects; impact wrenches are used to tighten bolts and nuts; impact screwdrivers are typically used to loosen or tighten the first screw; angle grinders can be used for grinding and cutting; chainsaws and circular saws are used for woodworking; and blowers can be used as gardening tools to clear fallen leaves or as cleaning tools to remove debris. Using power tools can improve work efficiency and reduce labor intensity.

[0003] In related technologies, the circuit board of a hair dryer is mainly located in the area above the motor in the housing. This layout takes up a lot of space and makes the overall structure of the hair dryer bulky. In addition, the space for cold air intake is relatively limited, which affects the heat dissipation performance of the circuit board.

[0004] This section provides background information related to this application, which is not necessarily prior art. Summary of the Invention

[0005] One objective of this application is to solve or at least mitigate some or all of the aforementioned problems, thereby improving the compactness of the hair dryer and enhancing the heat dissipation performance of the circuit board assembly.

[0006] To achieve this objective, the present invention adopts the following technical solution: A hair dryer includes: a housing having an air inlet and an air outlet; a main air duct forming between the air inlet and the air outlet; a fan assembly housed within the housing; a circuit board assembly electrically connected to the fan assembly to control the fan assembly; at least a portion of the circuit board assembly being located behind the air inlet in a front-rear direction; and at least a portion of the circuit board assembly being disposed on the airflow path within the main air duct.

[0007] In some embodiments, the rear end of the main air duct has a duct, and the circuit board assembly is located behind the duct.

[0008] In some embodiments, at least a portion of the circuit board assembly is located above the duct.

[0009] In some embodiments, the housing is provided with a grip handle, and the circuit board assembly is set at an acute angle relative to the grip handle.

[0010] In some embodiments, the circuit board assembly is tilted.

[0011] In some embodiments, the circuit board assembly includes control circuitry for controlling the fan assembly.

[0012] In some embodiments, the housing further includes a battery junction for removably mounting a battery pack.

[0013] In some embodiments, the housing is provided with a grip handle, and the circuit board assembly and battery junction are located on the same side of the grip handle.

[0014] In some embodiments, an operating element is arranged on the other side of the grip handle, which can be used to start the fan assembly.

[0015] In some embodiments, the housing is provided with a grip handle, and the circuit board assembly is disposed at the connection between the housing and the grip handle.

[0016] The advantages of this application are: This application provides a hair dryer in which a main air duct is formed between the air inlet and air outlet of the housing. A fan assembly is housed within the housing, and at least a portion of a circuit board assembly is located behind the air inlet, and at least a portion of the circuit board assembly is arranged along the airflow path within the main air duct. By arranging at least a portion of the circuit board assembly behind the air inlet, the space behind the air inlet can be fully utilized, reducing the space occupied by the circuit board assembly and thus improving the compactness of the hair dryer structure. Since at least a portion of the circuit board assembly is located along the airflow path within the main air duct, the airflow can be used to cool the circuit board assembly, improving heat dissipation performance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of one embodiment of this application; Figure 2 This is a front view of one embodiment of this application; Figure 3 This is a schematic diagram showing the removal of a portion of the shell in one embodiment of this application; Figure 4 This is a front view of one embodiment of the present application with part of the shell removed; Figure 5 This is a cross-sectional view of one embodiment of this application.

[0018] In the picture: 100. Hair dryer; 1. Housing; 11. Air inlet; 12. Air outlet; 13. Main air duct; 131. Duct; 14. Battery connection; 15. Connecting part; 2. Fan assembly; 3. Circuit board assembly; 31. Control circuit; 4. Handle; 5. Operating component; 51. Return spring. Detailed Implementation

[0019] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0020] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0021] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0022] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0023] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0024] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0025] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0026] Power tools play a vital role in daily production and life. These tools include, but are not limited to, electric drills, impact drills, impact wrenches, impact screwdrivers, angle grinders, chainsaws, circular saws, and blowers. Electric drills and impact drills can be fitted with drill bits of different diameters to drill holes in objects; impact wrenches are used to tighten bolts and nuts; impact screwdrivers are typically used to loosen or tighten the first screw; angle grinders can be used for grinding and cutting; chainsaws and circular saws are used for woodworking; and blowers can be used as gardening tools to clear fallen leaves or as cleaning tools to remove debris. Using power tools can improve work efficiency and reduce labor intensity.

[0027] In this embodiment, a rechargeable battery pack serves as the power source for the hair dryer during operation. In this embodiment, the battery pack is a battery array, which, in conjunction with a corresponding power circuit, supplies power to the hair dryer. Those skilled in the art should understand that in other embodiments, the hair dryer can also be powered by other power supply devices. For example, the power supply can be an AC power cord connected to mains electricity, or it can be other connecting cables that can be connected to a power supply device. Mains electricity or other power supply devices, in conjunction with corresponding rectification, filtering, and voltage regulation circuits, provide power to the corresponding components of the hair dryer. The term "battery pack" will be used to represent the power source below, but this should not be construed as a limitation of this application.

[0028] In the design and manufacturing of hair dryers, the circuit board is typically placed above the fan assembly. This arrangement results in a bulky overall structure and poor heat dissipation for the circuit board. To address these issues, such as... Figures 1-5 As shown, this application provides a hair dryer 100. The hair dryer 100 includes a housing 1, a fan assembly 2, and a circuit board assembly 3.

[0029] The housing 1 has an air inlet 11 and an air outlet 12; a main air duct 13 is formed between the air inlet 11 and the air outlet 12. A fan assembly 2 is housed within the housing 1. A circuit board assembly 3 is electrically connected to the fan assembly 2 to control the fan assembly 2; in the front-rear direction, at least a portion of the circuit board assembly 3 is located behind the air inlet 11; at least a portion of the circuit board assembly 3 is disposed on the airflow path within the main air duct 13.

[0030] By arranging at least a portion of the circuit board assembly 3 behind the air inlet 11, the space behind the air inlet 11 can be fully utilized, reducing the space occupied by the circuit board assembly 3 and thus improving the compactness of the blower 100 structure. Since at least a portion of the circuit board assembly 3 is located in the airflow path within the main air duct 13, the airflow can carry away the heat generated by the circuit board assembly 3 during operation, thereby rapidly cooling the circuit board assembly 3 and improving its heat dissipation performance.

[0031] like Figure 3 and Figure 4 As shown, in some embodiments, the rear end of the main air duct 13 has a duct 131, and the circuit board assembly 3 is located behind the duct 131. By setting the duct 131, its streamlined structure can guide chaotic airflow into an orderly columnar wind, reducing turbulence and loss within the main air duct 13, concentrating and compressing the generated airflow, increasing the air pressure and velocity at the outlet, and giving the airflow stronger impact and penetration. The duct 131 can directionally guide the airflow, improving operational accuracy and avoiding airflow diffusion and waste. Moreover, through the regulation and pressurization of the airflow by the duct 131, the blower 100 can output stronger effective wind energy at the same power, reducing ineffective airflow loss, thereby reducing energy consumption during long-term operation and saving operating costs. By arranging the circuit board assembly 3 behind the duct 131, on the one hand, the space behind the duct 131 can be fully utilized to arrange the circuit board assembly 3, thereby improving the compactness of the hair dryer 100 structure and enabling the hair dryer 100 to meet the needs of use in confined spaces; on the other hand, the airflow can pass through the circuit board assembly 3 during the process of entering the duct 131, thereby accelerating the heat dissipation of the circuit board assembly 3, ensuring that the circuit board assembly 3 can work efficiently, and maintaining a stable working state during the long-term use of the hair dryer 100, thus extending the service life of the circuit board assembly 3.

[0032] like Figure 3 and Figure 4As shown, in some embodiments, at least a portion of the circuit board assembly 3 is located above the duct 131. When the blower 100 is operating, the fan assembly 2 located in front of the duct 131 generates a large amount of heat, resulting in a high airflow temperature within the duct 131. Placing the circuit board assembly 3 above the duct 131 avoids direct impact from the high-temperature airflow. Furthermore, the airflow above the duct 131 is generally better, allowing natural convection to remove the heat generated by the electronic components on the circuit board assembly 3, reducing the probability of malfunction due to high-temperature aging and extending the lifespan of the circuit board assembly 3. Moreover, the operating environment of the blower 100 is often quite poor, filled with various dust, debris, or water mist. During the operation of the blower 100, the airflow entering the duct 131 carries a significant amount of impurities. Placing at least a portion of the circuit board assembly 3 above the duct 131 reduces the adhesion of contaminants such as dust, water mist, and oil, lowering the risk of short circuits and poor contact, while also improving the safety and stability of the electronic components within the circuit board assembly 3. The front of the duct 131 typically needs to accommodate core functional components such as the fan assembly 2 and fan blades, resulting in a relatively compact space. Moving at least part of the circuit board assembly 3 to the top of the duct 131 can fully utilize the unused space on top of the blower 100, making the overall layout more compact and avoiding mutual interference between components. Moreover, the circuit board assembly 3 can be disassembled and maintained without disassembling the duct 131 of the blower 100, reducing the difficulty of maintenance.

[0033] like Figure 3 and Figure 4 As shown, in some embodiments, a grip handle 4 is provided on the housing 1, and the circuit board assembly 3 is set at an acute angle relative to the grip handle 4. The grip handle 4 facilitates handheld use. The grip handle 4 can be integrally molded with the housing 1 of the hair dryer 100, ensuring the connection strength between the housing 1 and the grip handle 4 while reducing the number of steps required to install the grip handle 4 to the housing 1, facilitating rapid assembly. Furthermore, injection molding can be used, requiring only one injection molding process to manufacture both the housing 1 and the grip handle 4. Because the circuit board assembly 3 is set at an acute angle relative to the grip handle 4, the structure between the circuit board assembly 3 and the grip handle 4 is compact, reducing the space occupied by the circuit board assembly 3.

[0034] In some embodiments, when designing the handle 4 of the hair dryer 100, the curve of the handle 4 is designed to fit the natural curvature of the palm, reducing the continuous tension in the hand muscles, since users typically need to hold it for extended periods. Simultaneously, the thickness of the handle 4 is suitable for most adult hand sizes, avoiding the problems of slippery surfaces due to excessive thinness or difficult gripping due to excessive thickness, thus improving comfort during prolonged use. The hair dryer 100 itself has a certain weight, and the fan assembly 2 vibrates during operation; therefore, reinforcing ribs are added inside the handle to improve the torsional resistance of the overall structure of the handle 4. Furthermore, to prevent slippage due to sweaty hands after prolonged use, the surface of the handle 4 can be treated with an anti-slip coating. This can be achieved using an anti-slip material such as rubber or frosted plastic, ensuring a stable grip even when hands are oily or wet. The handle 4 can also be insulated to reduce the risk of electric shock and improve safety during use. Of course, anti-slip textures, grooves, or protrusions can also be designed on the surface of the handle 4; no further limitations are imposed here.

[0035] like Figures 3 to 5 As shown, in some embodiments, the circuit board assembly 3 is tilted. By tilting the circuit board assembly 3, space can be better utilized, and at the same time, the contact area between the circuit board assembly 3 and the airflow can be ensured, so that the airflow can effectively carry away the heat of the circuit board assembly 3 as it flows through it.

[0036] like Figures 3 to 5 As shown, in some embodiments, the circuit board assembly 3 includes a control circuit 31 for controlling the fan assembly 2. With the above arrangement, only one set of circuit board assemblies 3 is needed to control the fan assembly 2, which can reduce the number of circuit boards and reduce costs.

[0037] like Figure 1 , Figure 3 and Figure 4 As shown, in some embodiments, the housing 1 further includes a battery coupling portion 14 for detachably mounting a battery pack. The battery coupling portion 14 facilitates the installation of the battery pack. During operation of the hair dryer 100, the easily movable battery pack serves as a power source, facilitating the reuse of the hair dryer 100. Furthermore, once the battery pack is depleted, it can be directly replaced with a new one, quickly powering the hair dryer 100 and ensuring its continuous operation.

[0038] like Figures 3 to 4As shown, in some embodiments, the circuit board assembly 3 and the battery connector 14 are located on the same side of the handle 4. This arrangement shortens the distance between the battery pack and the circuit board assembly 3, facilitating internal wiring within the hair dryer 100. Furthermore, the battery pack connector is located behind the air inlet 11. After the battery pack is installed, its proximity to the handle 4 helps balance the overall center of gravity of the hair dryer 100, making it easier for the user to hold and use.

[0039] like Figures 3 to 5 As shown, in some embodiments, an operating element 5 is arranged on the other side of the handle 4. The operating element 5 can at least be used to start the fan assembly 2. By setting the operating element 5, and placing it close to the user's index finger, the user can easily press the operating element 5 during use, ensuring that the operating element 5 can be pressed continuously and stably, thereby ensuring that the fan assembly 2 can work for a long time. When the user releases the operating element 5, the operating element 5 resets under the action of its own return spring 51, and the hair dryer 100 stops working. Through the above settings, the hair dryer 100 can be prevented from being accidentally operated.

[0040] like Figures 1 to 5 As shown, in some embodiments, the circuit board assembly 3 is disposed at the connection portion 15 where the housing 1 connects to the handle 4. By making full use of the space at the connection portion 15 between the housing 1 and the handle 4, the circuit board assembly 3 can be effectively accommodated while saving space and improving the compactness of the hair dryer 100 structure. At the same time, the connection portion 15 between the handle 4 and the housing 1 needs to be reinforced (e.g., by increasing the thickness of the material at the connection portion 15) to prevent loosening or breakage under long-term stress, thus ensuring the durability of the hair dryer 100.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that the above embodiments do not limit this application in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this application.

Claims

1. A hair dryer, comprising: The housing (1) has an air inlet (11) and an air outlet (12); a main air duct (13) is formed between the air inlet (11) and the air outlet (12). The fan assembly (2) is housed within the housing (1); The circuit board assembly (3) is electrically connected to the fan assembly (2) to control the fan assembly (2); Its features are, In the front-to-back direction, at least a portion of the circuit board assembly (3) is located behind the air inlet (11); and at least a portion of the circuit board assembly (3) is disposed on the airflow path within the main air duct (13).

2. The hair dryer according to claim 1, characterized in that, The rear end of the main air duct (13) has a duct (131), and the circuit board assembly (3) is located behind the duct (131).

3. The hair dryer according to claim 2, characterized in that, At least a portion of the circuit board assembly (3) is located above the duct (131).

4. The hair dryer according to claim 1, characterized in that, The housing (1) is provided with a grip handle (4), and the circuit board assembly (3) is set at an acute angle relative to the grip handle (4).

5. The hair dryer according to claim 1, characterized in that, The circuit board assembly (3) is tilted.

6. The hair dryer according to claim 1, characterized in that, The circuit board assembly (3) includes a control circuit (31) for controlling the fan assembly (2).

7. The hair dryer according to claim 1, characterized in that, The housing (1) also includes a battery coupling (14) for detachably mounting a battery pack.

8. The hair dryer according to claim 7, characterized in that, The housing (1) is provided with a grip handle (4), and the circuit board assembly (3) and the battery junction (14) are located on the same side of the grip handle (4).

9. The hair dryer according to claim 8, characterized in that, An operating element (5) is arranged on the other side of the grip (4), which can at least be used to start the fan assembly (2).

10. The hair dryer according to claim 1, characterized in that, The housing (1) is provided with a grip handle (4), and the circuit board assembly (3) is provided at the connection part (15) where the housing (1) and the grip handle (4) are connected.

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