Hair drier

Abstract

The utility model discloses a hair dryer which comprises a machine head and a handle, the machine head is connected to the top of the handle, the machine head comprises a main shell, a hot air assembly and a circuit board assembly are arranged in the main shell, the hot air assembly comprises a heating support and a heating piece fixed to the heating support, and the circuit board assembly comprises a circuit board support and a control circuit board. One side of the circuit board support is fixedly connected with the heating support, the control circuit board is fixed to the side, back to the heating support, of the circuit board support, components of the control circuit board face the circuit board support, a heat dissipation channel is formed between the control circuit board and the circuit board support, the circuit board support is provided with an air inlet hole and an air outlet hole, and the handle is provided with an air inlet channel. The air inlet channel, the air inlet hole, the heat dissipation channel and the air outlet hole are communicated in sequence so as to dissipate heat of components of the control circuit board. According to the blower, the problem that the heat dissipation effect of a control circuit of the blower is poor is solved, and the effect of fully dissipating heat of components is achieved.

Description

Technical Field

[0001] This utility model relates to the field of home appliance technology, and in particular to a hair dryer. Background Technology

[0002] Hair dryers are necessities in daily life, and feedback regarding circuit board malfunctions is frequently received in the market. The structure that generates airflow is the fan, and the structure that heats the airflow is the heating element. The structure that drives the fan is the motor. Brushless motors are relatively stable in operation, but because the circuit board of a brushless motor (especially its MOSFETs and SCRs) generates a lot of heat, and to reduce noise, it's inconvenient to directly install the circuit board in the air duct, the brushless motor installed in the hair dryer suffers from poor heat dissipation and unstable operation, limiting its application in hair dryers. Some hair dryers have the circuit board made into a ring and placed on the outer periphery of the air duct to utilize the incoming air for cooling. However, in this structure, the contact area between the incoming air and the circuit board is limited, especially in the leeward side of the circuit board where there is no contact with the incoming air, resulting in insufficient heat dissipation.

[0003] The prior art CN114587058A discloses "a hair dryer", specifically a hair dryer including a rectifier wing assembly and a heater assembly disposed in the housing. The handle is provided with heat dissipation holes. The rectifier wing assembly includes a motor and blades. The heating element is disposed on the side opposite to the blades, separated from the motor. An air outlet is provided between the blades of the rectifier wing assembly and the heating element of the heater assembly. The air outlet is connected to the heat dissipation holes to form a heat dissipation channel for air to flow through, so that the airflow enters the air outlet and flows out from the heat dissipation holes, thereby using the flow of air to dissipate heat on the components in the heat dissipation channel.

[0004] In the aforementioned application, the circuit components are housed inside the handle, and the heat dissipation holes are located on the outer shell of the handle. To dissipate heat from the circuit components inside the handle, a heat dissipation channel is formed by connecting the air outlet between the blades and the heating element with the heat dissipation holes. Therefore, it is necessary to divert a portion of the airflow that was originally blown entirely towards the front of the hair dryer to be blown out from the air outlet. However, the process of airflow from the air outlet to the heat dissipation holes is based on the natural flow of air pressure difference. So when the hair dryer is working, the airflow blows out from the air outlet. At this time, the air pressure at the air outlet is higher, while the air pressure at the heat dissipation holes is lower. The airflow naturally flows from the air outlet to the heat dissipation holes. However, this passive flow method will make the airflow speed towards the heat dissipation holes slower and slower. Furthermore, since the circuit components are housed inside the handle, the airflow path is relatively long, which will result in poor heat dissipation.

[0005] Furthermore, as stated in the application, in order to minimize the impact on the blowing effect, most of the airflow will be blown out from the front of the hair dryer along the main air duct through the heating element of the heating component to dry hair or clothes. Therefore, only a small portion of the airflow is blown out from the air outlet, resulting in less airflow flowing into the heat dissipation channel, which in turn leads to poor heat dissipation of the circuit components. Utility Model Content

[0006] The purpose of this invention is to provide a hair dryer that solves the problem of poor heat dissipation of the control circuit board. By forcing part of the airflow to actively enter the heat dissipation channel formed between the control circuit board and the circuit board support, the effect of sufficient heat dissipation of the components is achieved.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a hair dryer, including a head and a handle, the head being connected to the top of the handle, the head including a main housing, the main housing containing a hot air assembly and a circuit board assembly, the hot air assembly including a heating bracket and a heating element fixed to the heating bracket, the circuit board assembly including a circuit board bracket and a control circuit board, one side of the circuit board bracket being fixedly connected to the heating bracket, the control circuit board being fixed to the side of the circuit board bracket facing away from the heating bracket, the components of the control circuit board facing the circuit board bracket, a heat dissipation channel being formed between the control circuit board and the circuit board bracket, the circuit board bracket having an air inlet and an air outlet, the handle having an air inlet channel, the air inlet channel, the air inlet, the heat dissipation channel, and the air outlet being sequentially connected to dissipate heat from the components of the control circuit board.

[0008] After adopting the above technical solution, this utility model has the following advantages: The control circuit board is fixed on the side of the circuit board bracket facing away from the heating bracket, forming a heat dissipation channel between the control circuit board bracket and the heating bracket. When the blower is started, the airflow enters the heat dissipation channel through the air inlet channel in the handle and then blows out from the air outlet, so that the airflow forms a cold air circulation between the circuit board bracket and the control circuit board. Since the components of the control circuit board are installed facing the circuit board bracket, when the airflow continuously circulates in the heat dissipation channel, it will carry away the heat of the components of the control circuit board, thereby reducing the temperature of the components and enabling the components to work within the optimal temperature range. This extends the service life of the blower and increases the reliability of the blower, avoiding safety risks or poor user experience caused by excessive temperature.

[0009] Furthermore, the heating bracket is equipped with hot air channels, which are distributed around the outer periphery of the mounting cavity and are connected to the air inlet channel and the air outlet respectively.

[0010] Using the aforementioned technical solution, the hot air channel surrounds the outer periphery of the mounting cavity and connects to the air inlet channel. Part of the cold airflow from the air inlet channel flows into the hot air channel, is heated within the hot air channel, and is then blown out. Another part enters the heat dissipation channel through the air inlet to dissipate heat from the components on the control circuit board. Furthermore, the hot air channel is also connected to the air outlet, which allows the airflow used to absorb heat from the components on the control circuit board to re-enter the hot air channel through the air outlet. Because this part of the airflow has absorbed heat from the components on the control circuit board, it has been initially heated within the heat dissipation channel. When it re-enters the hot air channel through the air outlet, it can reach the set heating temperature more quickly. This not only saves the time required for heating the airflow but also improves the utilization rate of this part of the airflow, making secondary use of it, optimizing the blowing efficiency, improving the heating performance of the blower, and reducing energy consumption.

[0011] Furthermore, the components include capacitors with a length greater than 30mm, which are mounted laterally on the control circuit board, and a shock-absorbing component is provided between the end of the capacitor away from the pin and the control circuit board.

[0012] Using the aforementioned technical solution, because the capacitor's length exceeds 30mm, it is mounted horizontally on the control circuit board. In this case, the capacitor and control circuit board are connected only by pins. Since users shake the hairdryer, the capacitor will also vibrate inside the hairdryer. To prevent abnormal noise or malfunction from prolonged shaking, a shock absorber is placed at the end furthest from the pins. This shock absorber effectively absorbs and disperses the impact forces generated by the capacitor's vibrations and other structures, preventing abnormal noises from collisions between structures, extending the lifespan of the capacitor and surrounding structures, and optimizing the user experience. The shock absorber also supports the gap between the capacitor and the control circuit board, allowing for airflow and better heat dissipation for the capacitor.

[0013] Furthermore, the heating bracket has a central mounting cavity, in which a negative ion generator is installed. The circuit board bracket has a first through hole facing the negative ion generator. The wall of the first through hole has multiple lugs, and a first fastener passes through the lugs and is fixedly connected to the heating bracket.

[0014] Using the aforementioned technical solution, the negative ion generator is installed inside the mounting cavity of the heating bracket, avoiding the negative ion generator occupying axial space inside the head and simplifying the installation process. Furthermore, by fixing one side of the circuit board bracket to the heating bracket, the negative ion generator is axially positioned inside the mounting cavity. This prevents the user from bumping into the heating bracket and making abnormal noises during use, reducing noise generation and lowering the risk of damage to the negative ion generator due to collisions between structures. At the same time, by adding a negative ion generator inside the mounting cavity, the airflow carrying negative ions can neutralize the positive charge on the user's hair, thereby reducing static electricity. It also has the function of locking in moisture on the hair, making the hair look softer, smoother, and radiating a healthy shine, thus improving the user experience. The first through-hole faces the ion generator. During the installation of the circuit board bracket and the heating bracket, the position of the negative ion generator can be clearly observed through the first through-hole, facilitating the alignment of the mounting cavities of the circuit board bracket and the heating bracket, reducing installation errors, and improving installation efficiency and accuracy. At the same time, a lug is provided on the wall of the first through-hole, providing a mounting position for the first fastener, increasing the structural strength of the connection between the circuit board bracket and the heating bracket, and enabling the connection to withstand greater external forces. The circuit board bracket and the heating bracket are connected by the lug and the fastener, making subsequent maintenance and replacement more convenient. Users only need to loosen the fastener to disassemble the circuit board bracket and the heating bracket, reducing maintenance costs and time costs, and improving the flexibility of use. At the same time, the cooling air flowing in the heat dissipation channel can create negative pressure in the first through-hole, thereby absorbing the negative ions generated by the negative ion generator.

[0015] Furthermore, the wall of the first through hole is provided with a positioning rib, which presses against the negative ion generator to axially position the negative ion generator in the mounting cavity.

[0016] By adopting the aforementioned technical solution, the positioning rib presses against the negative ion generator to prevent the negative ion generator from moving in the axial direction. This avoids the negative ion generator from colliding with the heating bracket and making abnormal noises when the user uses and shakes the hair dryer. This not only reduces noise generation but also reduces the risk of damage to the negative ion generator caused by collisions between structures, and improves the stability of the negative ion generator in the installation cavity.

[0017] Furthermore, the positioning rib is equipped with a first limiting rib to guide the probe harness of the negative ion generator.

[0018] By adopting the aforementioned technical solution, the cooperation between the first limiting rib and the probe harness routing not only ensures the uniqueness of the installation of the circuit board bracket and the heating bracket, and guarantees accurate installation between the two, but also enables the probe harness to be installed along the direction guided by the first limiting rib during installation, and isolates the probe harness, avoiding the risk of short circuits in the probe harness caused by scratches on the surface during the installation of the heating bracket and the circuit board bracket. This protects the integrity of the probe harness and ensures electrical safety.

[0019] Furthermore, a second limiting rib is provided on the side of the circuit board bracket facing the heating bracket to guide the probe harness of the negative ion generator, and the second limiting rib extends along the edge of the first through hole.

[0020] By adopting the aforementioned technical solution, the probe harness can be installed along the direction guided by the second limiting rib during installation, and the probe harness is isolated, avoiding the risk of short circuits caused by scratches on the outer sheath during the installation of the heating bracket and the circuit board bracket. This protects the integrity of the probe harness and ensures electrical safety.

[0021] Furthermore, the edge of the circuit board bracket is provided with a notch, which together with the inner wall of the main housing forms an air inlet; and / or, the circuit board bracket is provided with a through hole forming an air outlet.

[0022] Using the aforementioned technical solution, since the notch is located at the edge of the circuit board bracket, airflow can directly enter the heat dissipation channel through the air intake channel inside the handle, and then be blown out through the through hole. This creates a smoother airflow circulation between the circuit board bracket and the control circuit board. As the airflow continuously circulates within the heat dissipation channel, it carries away the heat from the components of the control circuit board, thereby reducing the component temperature and allowing the components to operate within a suitable temperature range. The circuit board bracket has through holes forming air outlets. Airflow enters the heat dissipation channel through the air intake channel inside the handle, and then is blown out through the air outlets, creating a circulation of cool air between the circuit board bracket and the control circuit board. As the airflow continuously circulates within the heat dissipation channel, it carries away the heat from the components of the control circuit board. The system controls the heat of the components on the circuit board, thereby reducing their temperature and ensuring they operate within a suitable temperature range. The notch at the edge of the circuit board bracket and the inner wall of the main housing form an air inlet, and the circuit board bracket has a through-hole forming an air outlet. Airflow enters the heat dissipation channel directly from the notch through the air inlet channel inside the handle, and then exits through the through-hole. This optimizes the airflow circulation path within the heat dissipation channel, accelerates the airflow rate, and more quickly removes heat from the components on the control circuit board. This results in better heat dissipation, improved heat dissipation efficiency, extended lifespan of the blower, and increased reliability, preventing safety risks or poor user experience caused by excessive heat.

[0023] Furthermore, a positioning post is provided on the side of the circuit board bracket facing the control circuit board, and the control circuit board is fixed to the top of the positioning post.

[0024] By adopting the aforementioned technical solution, the control circuit board is fixed to the top of the positioning post, so that a heat dissipation channel can be formed between the circuit board bracket and the control circuit board. This allows for smoother airflow between the two, accelerates the airflow rate, and can more quickly remove the heat from the components of the control circuit board, thereby improving heat dissipation efficiency, extending the service life of the hair dryer, and increasing the reliability of the hair dryer. It also avoids safety risks or poor user experience caused by excessive temperature.

[0025] Furthermore, a limiting post is provided on the side of the circuit board bracket facing the control circuit board. The limiting post abuts against the edge of the control circuit board, and the limiting post and the positioning post are connected as an integral structure.

[0026] Using the aforementioned technical solution, the limiting post abuts against the edge of the control circuit board, restricting the circumferential movement between the control circuit board and the circuit board bracket. When installing the control circuit board and the circuit board bracket, the control circuit board can be first matched with the limiting post for initial positioning, ensuring stability between the two. Then, the two are aligned and fixedly connected by the positioning post. The entire installation process is simple and convenient, and easy to disassemble. The connection between the limiting post and the positioning post not only increases the connection strength between the two and allows them to share external forces, but also ensures the installation accuracy between the control circuit board and the circuit board bracket. This avoids inaccurate assembly between the control circuit board and the circuit board bracket due to unstable installation between the limiting post and the positioning post, thus improving the stability of the circuit board assembly. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings:

[0028] Figure 1 This is a schematic diagram of the structure of a hair dryer according to the present invention;

[0029] Figure 2 This utility model Figure 1 Enlarged view of point A in the image;

[0030] Figure 3 This is an exploded view of the hot air assembly and circuit board assembly of this utility model;

[0031] Figure 4 This is a schematic diagram of the structure of the heating bracket of this utility model;

[0032] Figure 5 This is a schematic diagram of the circuit board support structure of this utility model. Figure 1 ;

[0033] Figure 6 This is a schematic diagram of the circuit board support structure of this utility model. Figure 2 ;

[0034] Figure 7 This is a schematic diagram of the control circuit board of this utility model. Detailed Implementation

[0035] 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.

[0036] The terms "first," "second," etc. (if present) in the specification and claims of this utility model are used to distinguish similar objects, not to describe a specific order or sequence. Even if "second" is used before a technical feature for distinction, it does not necessarily imply the presence of "first." It should be understood that in this utility model, "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. It should be understood that in this utility model, "multiple" refers to two or more. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, X and / or Y can represent: X alone, X and Y simultaneously, and Y alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "Containing X, Y, and Z," "Containing X, Y, and Z" means that all three X, Y, and Z are included; "Containing X, Y, or Z" means that one of X, Y, and Z is included; "Containing X, Y, and / or Z" means that any one, two, or three of X, Y, and Z are included.

[0037] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be selected to be combined or substituted with each other according to the actual situation, and the same or similar concepts or processes may not be described again in some embodiments.

[0038] like Figures 1 to 4As shown, this utility model provides a hair dryer, including a head 1 and a handle 5. The head 1 is connected to the top of the handle 5. The head 1 includes a main housing, and a hot air assembly 2 and a circuit board assembly 4 are provided inside the main housing. The hot air assembly 2 includes a heating bracket 21 and a heating element 22 fixed to the heating bracket 21. The circuit board assembly 4 includes a circuit board bracket 41 and a control circuit board 42. One side of the circuit board bracket 41 is fixedly connected to the heating bracket 21. The control circuit board 42 is fixed on the side of the circuit board bracket 41 facing away from the heating bracket 21. The components of the control circuit board 42 face the circuit board bracket 41. A heat dissipation channel 43 is formed between the control circuit board 42 and the circuit board bracket 41. The circuit board bracket 41 is provided with an air inlet 411 and an air outlet 412. The handle 5 is provided with an air inlet channel. The air inlet channel, the air inlet 411, the heat dissipation channel 43, and the air outlet 412 are connected in sequence to dissipate heat from the components of the control circuit board 42.

[0039] Understandably, the control circuit board 42 is fixed to the side of the circuit board bracket 41 facing away from the heating bracket 21, forming a heat dissipation channel 43 between it and the circuit board bracket 41. When the blower is started, airflow enters the heat dissipation channel 43 through the air inlet 411 in the air inlet channel inside the handle 5, and then blows out from the air outlet 412, causing the airflow to form a cold air circulation between the circuit board bracket 41 and the control circuit board 42 (e.g., Figure 2 (The dotted line in the diagram) Since the components of the control circuit board 42 are mounted facing the circuit board bracket 41, when the airflow continuously circulates in the heat dissipation channel 43, it will carry away the heat of the components of the control circuit board 42, thereby reducing the temperature of the components and enabling the components to work within the optimal temperature range. This extends the service life of the hair dryer and increases the reliability of the hair dryer, avoiding safety risks or poor user experience caused by excessive temperature.

[0040] It should be noted that the heating bracket 21 has a mounting cavity 211 in the center, and the negative ion generator 3 is installed in the mounting cavity 211. The negative ion generator 3 is axially positioned in the mounting cavity 211 by fixing one side of the circuit board bracket 41 to the heating bracket 21. This can prevent the user from bumping into the heating bracket 21 and making abnormal noises during use. It not only reduces the generation of noise, but also reduces the risk of damage to the negative ion generator 3 caused by mutual collision between structures.

[0041] By adding a negative ion generator 3 to the hair dryer, the airflow carrying negative ions can neutralize the positive charge on the user's hair, thereby reducing static electricity. It also has the function of locking in moisture on the hair, making the hair look softer, smoother, and radiating a healthy shine, thus improving the user experience.

[0042] Specifically, the front end of the negative ion generator 3 (the direction described in the embodiment is consistent with the direction indicated in the attached figure) is inserted into the mounting cavity 211. The rear end of the negative ion generator 3 is axially positioned in the mounting cavity 211 by fixing one side of the circuit board bracket 41 to the heating bracket 21. The control circuit board 42 is fixed to the side of the circuit board bracket 41 facing away from the heating bracket 21, and the rear end of the negative ion generator 3 and the control circuit board 42 maintain a spatial distance of more than 3mm.

[0043] In this way, the circuit board bracket 41 can not only fix the negative ion generator 3 in the mounting cavity 211, but also isolate the negative ion generator 3 from the control circuit board 42, and maintain a space of more than 3mm between the rear end of the negative ion generator 3 and the control circuit board 42, ensuring that there is sufficient distance between the negative ion generator 3 and the control circuit board 42 to avoid electromagnetic interference caused by the distance between them being too close. This structure not only ensures that the negative ion generator 3 is stably installed in the main housing, but also simplifies the assembly process and improves assembly efficiency. In addition, this installation method ensures that the negative ion generator 3 and the control circuit board 42 will not interfere with each other when the hair dryer is working, improving the user experience and making it safer to use.

[0044] like Figures 4 to 6 As shown, in order to better fix the negative ion generator 3 in the mounting cavity 211, the circuit board bracket 41 is provided with a first through hole 413 facing the negative ion generator 3. The hole wall of the first through hole 413 is provided with a positioning rib 414. By pressing the positioning rib 414 against the negative ion generator 3, the negative ion generator 3 is prevented from moving in the axial direction. This avoids the negative ion generator 3 from colliding with the heating bracket 21 and making abnormal noise when the user uses and shakes the hair dryer. This not only reduces the generation of noise, but also reduces the risk of damage to the negative ion generator 3 caused by mutual collision between structures, and improves the stability of the negative ion generator 3 in the mounting cavity 211.

[0045] Specifically, an elastic positioning arm 212 is installed on the inner wall of the mounting cavity 211. The elastic positioning arm 212 abuts against the front end of the negative ion generator 3, so that the negative ion generator 3 can be fixed in the mounting cavity 211, ensuring the stability of the negative ion generator 3 in the mounting cavity 211. At the same time, when the user shakes or vibrates the hair dryer, the elastic positioning arm 212 can absorb part of the force, reduce the direct impact of the negative ion generator 3 on other structures, and extend the service life of the negative ion generator 3.

[0046] The negative ion generator 3 has a probe wire harness that is electrically connected to the control circuit board 42. The positioning rib 414 is provided with a first limiting rib 415 to guide the probe wire harness of the negative ion generator 3. The circuit board bracket 41 is provided with a second limiting rib 416 to guide the probe wire harness of the negative ion generator 3 on the side facing the heating bracket 21. The second limiting rib 416 extends along the edge of the first through hole 413.

[0047] The coordination between the first limiting rib 415, the second limiting rib 416, and the probe harness routing ensures the uniqueness of the installation of the circuit board bracket 41 and the heating bracket 21, guaranteeing accurate installation between them. It also allows the probe harness to be installed along the direction guided by the first limiting rib 415, isolating the probe harness and preventing risks such as short circuits caused by scratches on the outer sheath of the heating bracket 21 and the circuit board bracket 41 during installation. This protects the integrity of the probe harness and ensures electrical safety.

[0048] The circuit board bracket 41 is also provided with a pressure plate 417 for pressing down the probe wire harness of the negative ion generator 3 at the end opposite to the heating bracket. The pressure plate 417 is mainly used to avoid scratching the probe wire harness during the assembly of the heating bracket 21 and the circuit board bracket 41.

[0049] The circuit board bracket 41 is also provided with two small through holes 418, which are mainly used for the probe beam of the negative ion generator 3 to pass through. The small through holes 418 are convenient for the probe beam to pass through, and can also avoid electromagnetic interference to the control circuit board 42.

[0050] During the installation of the circuit board bracket 41 and the heating bracket 21, the first through hole 413 allows for a clear observation of the position of the negative ion generator 3, facilitating the alignment of the mounting cavity 211 of the circuit board bracket 41 and the heating bracket 21, reducing installation errors, and improving installation efficiency and accuracy.

[0051] Specifically, the wall of the first through hole 413 is provided with four lugs 44. The circuit board bracket 41 is fixedly connected to the heating bracket 21 by four first fasteners passing through the lugs 44 respectively. In this embodiment, the first fasteners are screws. In other embodiments, as long as they serve the purpose of fixing the circuit board bracket 41 to the heating bracket 21, they are acceptable. Preferably, they are detachable connections, such as rivets.

[0052] Lug 44 provides a mounting position for the first fastener, increasing the structural strength of the connection between the circuit board bracket 41 and the heating bracket 21. The connection between the two can withstand greater external forces. The circuit board bracket 41 and the heating bracket 21 are connected by the lug 44 and the fastener, which also makes subsequent maintenance and replacement more convenient. Users only need to loosen the first fastener to disassemble the circuit board bracket 41 and the heating bracket 21, reducing maintenance costs and time costs, and improving the flexibility of use.

[0053] Meanwhile, the heating bracket 21 is provided with a positioning boss 419, and the first through hole 413 forms a positioning groove 45 between two adjacent lugs 44. The positioning groove 45 cooperates with the positioning boss 419. The radial positioning of the heating bracket 21 and the circuit board bracket 41 is achieved through the cooperation of the boss and the positioning groove 45. During the installation of the heating bracket 21 and the circuit board bracket 41, the positioning groove 45 can be installed on the boss for alignment and positioning first, and then the first fastener can be passed through the lug 44 for fixation. This not only makes the installation between the two more convenient and improves the accuracy of the installation, but also avoids the abnormal noise and displacement caused by unstable installation due to shaking of the blower during subsequent use by the user. The cooperation between the positioning groove 45 and the boss not only reduces the generation of noise and avoids unstable connection between the structures, but also simplifies the installation process.

[0054] In this embodiment, the edge of the circuit board bracket 41 is provided with a notch 46, the notch 46 and the inner sidewall of the main housing form an air inlet 411, and the circuit board bracket 41 is provided with a through hole 47 forming an air outlet 412.

[0055] Since the notch 46 is located at the edge of the circuit board bracket 41, the airflow enters the heat dissipation channel 43 directly through the air inlet channel in the handle 5, and then blows out through the through hole 47. This allows the airflow to form a smoother circulation between the circuit board bracket 41 and the control circuit board 42, optimizes the circulation path of the airflow in the heat dissipation channel 43, accelerates the airflow rate, and can more quickly remove the heat from the components of the control circuit board 42. This results in better heat dissipation of the components, improves heat dissipation efficiency, extends the service life of the hair dryer, and increases the reliability of the hair dryer. It also avoids safety risks or poor user experience caused by excessive temperature.

[0056] In other embodiments, only the notch 46 may be provided. Only the through hole 47 may be provided.

[0057] Regardless of the configuration, the purpose is to remove heat from the components on the control circuit board 42 through airflow, thereby reducing the temperature of the components and enabling them to operate within their optimal temperature range.

[0058] Based on the above, the notch 46 and the through hole 47 can also have other functions, such as: serving as through holes for the wire harness of the control circuit board 42.

[0059] like Figure 7 As shown, the above-mentioned components include a capacitor 421 with a length greater than 30mm. The capacitor 421 is mounted horizontally on the control circuit board 42. A shock-absorbing component 422 is provided between the outer periphery of the capacitor 421 away from the pin and the control circuit board 42.

[0060] Among them, the material of the shock absorber 422 is preferably EVA cotton.

[0061] Because the length of capacitor 421 is greater than 30mm, it is mounted horizontally on the control circuit board 42. At this time, capacitor 421 and control circuit board 42 are only connected by pins. Since users shake the hair dryer, capacitor 421 will also shake inside the hair dryer. To prevent abnormal noise or failure of the capacitor due to long-term shaking, a shock absorber 422 is set at the end away from the pins. The shock absorber 422 can effectively absorb and disperse the impact force generated by capacitor 421 and other structures during shaking, and also avoid abnormal noise caused by collision between structures, thus extending the service life of capacitor 421 and surrounding structures that cooperate with capacitor 421, and optimizing the user experience.

[0062] In addition, the heating bracket 21 is provided with hot air channels, which are distributed around the outer periphery of the mounting cavity 211. The hot air channels are connected to the air inlet channel and the air outlet 412 respectively.

[0063] Based on the above, the heat dissipation channel 43 can also serve as a connection channel for outputting negative ions. The connection channel is connected to the negative ion generator 3 through the first through hole 413.

[0064] As described above, part of the airflow in the air inlet channel flows into the hot air channel, where it is heated and then blown out; another part enters the heat dissipation channel 43 through the air inlet hole to dissipate heat from the components of the control circuit board 42. Furthermore, the hot air channel is also connected to the air outlet 412, which allows the airflow used to absorb heat from the components of the control circuit board 42 to re-enter the hot air channel through the air outlet 412. This portion of the airflow, having absorbed heat from the components of the control circuit board 42, is initially heated within the heat dissipation channel 43. When it re-enters the hot air channel through the air outlet 412... When the air enters the hot air channel, it can reach the set heating temperature more quickly. This not only saves the time required for heating the airflow but also improves the utilization rate of this airflow, making it a secondary resource. This optimizes the blowing efficiency, improves the heating performance of the hair dryer, and reduces energy consumption. Furthermore, the airflow carrying negative ions can neutralize the positive charge on the user's hair, thereby reducing static electricity. It also has the function of locking in moisture on the hair, making the hair look softer, smoother, and radiating a healthy shine, thus enhancing the user experience.

[0065] It should be noted that in the prior art CN114587058A, the airflow used for heat dissipation is directly discharged from the heat dissipation holes, resulting in the loss of this airflow and waste of airflow. However, in this embodiment, the airflow used for heat dissipation can return to the hot air channel after heat dissipation, realizing the secondary utilization of this airflow and improving the efficiency of blowing.

[0066] To facilitate a better connection between the circuit board bracket 41 and the control circuit board 42, a positioning post 48 is provided on the side of the circuit board bracket 41 facing the control circuit board 42. The control circuit board 42 is fixed to the top of the positioning post 48, forming a heat dissipation channel 43 between the circuit board bracket 41 and the control circuit board 42. This allows for smoother airflow between the two, accelerates the airflow rate, and more quickly removes heat from the components of the control circuit board 42. This results in better heat dissipation for the components, improves heat dissipation efficiency, extends the service life of the hair dryer, and increases the reliability of the hair dryer, avoiding safety risks or poor user experience caused by excessive temperature.

[0067] Even better, a limiting post 49 is provided on the side of the circuit board bracket 41 facing the control circuit board 42. The limiting post 49 abuts against the edge of the control circuit board 42, restricting the circumferential movement between the control circuit board 42 and the circuit board bracket 41. When the control circuit board 42 and the circuit board bracket 41 are installed, the control circuit board 42 can be first matched with the limiting post 49 for initial limiting, ensuring the stability between the two. Then, the two are aligned and fixedly connected by the positioning post 48. The whole installation process is simple and convenient, and easy to disassemble. Moreover, the limiting post 49 and the positioning post 48 are connected as a whole structure. This not only increases the connection strength between the two and allows them to share external forces, but also ensures the installation accuracy between the control circuit board 42 and the circuit board bracket 41. It avoids inaccurate assembly between the control circuit board 42 and the circuit board bracket 41 due to the unstable installation between the limiting post 49 and the positioning post 48, thus improving the stability of the circuit board assembly 4.

[0068] In addition to the preferred embodiments described above, there are other embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection claimed by this utility model.

Claims

1. A hair dryer comprising a handpiece and a handle, the handpiece being connected to the top of the handle, characterized in that, The handpiece comprises a main shell, a hot air assembly and a circuit board assembly are arranged in the main shell, the hot air assembly comprises a heating support and a heating element fixed to the heating support, the circuit board assembly comprises a circuit board support and a control circuit board, one side of the circuit board support is fixedly connected with the heating support, the control circuit board is fixed to one side of the circuit board support which is opposite to the heating support, components of the control circuit board are directed to the circuit board support, a heat dissipation channel is formed between the control circuit board and the circuit board support, air inlet holes and air outlet holes are arranged on the circuit board support, the handle is provided with an air inlet channel, the air inlet channel, the air inlet holes, the heat dissipation channel and the air outlet holes are sequentially communicated to dissipate heat of the components of the control circuit board.

2. The hair dryer of claim 1, wherein The heating support is provided with a hot air channel which is distributed around the outer periphery of the heating support, and the hot air channel is connected with the air inlet channel and the air outlet hole.

3. The hair dryer of claim 1, wherein The components include a capacitor with a length greater than 30 mm, the capacitor is transversely mounted on the control circuit board, and a damping member is arranged between the outer periphery of the capacitor away from the pin end and the control circuit board.

4. The hair dryer of claim 1, wherein The center of the heating support is provided with a mounting cavity, and a negative ion generator is mounted in the mounting cavity, the circuit board support is provided with a first through hole facing the negative ion generator, the hole wall of the first through hole is provided with a plurality of lugs, and a first fastener is fixedly connected with the heating support through the lugs.

5. The hair dryer of claim 4, wherein, The hole wall of the first through hole is provided with a positioning protruding rib, the positioning protruding rib is pressed against the negative ion generator to axially position the negative ion generator in the mounting cavity.

6. The hair dryer of claim 5, wherein, The positioning protruding rib is provided with a first limiting rib for guiding the wiring of a probe wire harness of the negative ion generator.

7. The hair dryer of claim 4, wherein, The side of the circuit board support facing the heating support is provided with a second limiting rib for guiding the wiring of the probe wire harness of the negative ion generator, and the second limiting rib extends along the edge of the first through hole.

8. The hair dryer of claim 1, wherein, The edge of the circuit board support is provided with a notched groove, and the notched groove and the inner side wall of the main shell form the air inlet hole; and / or, the circuit board support is provided with a through hole forming the air outlet hole.

9. The hair dryer of claim 1, wherein, The side of the circuit board support facing the control circuit board is provided with a positioning column, and the control circuit board is fixed to the top end of the positioning column.

10. The hair dryer of claim 9, wherein, The side of the circuit board support facing the control circuit board is provided with a limiting column, the limiting column abuts against the edge of the control circuit board, and the limiting column and the positioning column are connected as an integral structure.

Images