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, a negative ion generator 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 an installation cavity is formed in the center of the heating support. The front end of the negative-ion generator is inserted into the mounting cavity, 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 and axially positions the rear end of the negative-ion generator, and the control circuit board is fixed to the side, back to the heating support, of the circuit board support. According to the utility model, the negative ion generator can be fixed in the blower on the basis that the axial length of the original machine head is not increased.

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 a common household item. After washing their hair, people use hair dryers to dry it. Hair dryers typically use a motor to rotate the fan blades, drawing air in through the inlet. The centrifugal airflow created inside the hair dryer is then blown out through the nozzle. If the heating element is energized and heated, hot air is blown out; otherwise, cold air is blown out. Hair dryers heat the hair during operation, and the airflow dries the hair, making it prone to static electricity. Static electricity can cause hair to become deformed, curly, or stick out. However, negative ion hair dryers generate negatively charged ions that neutralize the positive charges often found in hair, eliminating static electricity and smoothing frizzy hair.

[0003] The prior art publication number CN219047652U discloses "a negative ion hair dryer", which specifically discloses that the hair dryer has an air guide bracket along its axial direction, a heating component is connected to the front end of the air guide bracket, a control component is connected to the rear end of the air guide bracket, a protruding mounting part is provided on the air guide bracket, a mounting groove for mounting a negative ion generator is provided on the mounting part, and a recessed part is provided for docking with the air guide bracket. One end of the negative ion generator is fixed to the air guide bracket by fitting with the mounting groove, and the other end is fixed to the heating component by abutting against a limiting post provided in the recessed part.

[0004] In the aforementioned application, one end of the negative ion generator needs to be inserted into the mounting slot and fitted to it. Then, the other end is pressed against the limiting post of the heating bracket to fix the negative ion generator inside the hair dryer. However, the air guide bracket not only needs to fix the negative ion generator but also needs to be precisely positioned with the heating bracket to achieve the function of air guiding. The air guide bracket needs to be assembled by connecting the first threaded post of the recessed part of the heating bracket through the first through hole of the mounting part to allow the air guide channel formed between two adjacent mica heating elements to guide air smoothly. However, since the installation of the negative ion generator and the heating bracket precedes the assembly of the air guide bracket and the heating bracket, the negative ion generator and the negative ion emitting needle located on the heating bracket are prone to instability during the assembly of the heating bracket and the air guide bracket. Therefore, this process not only needs to ensure the fixation of the negative ion generator inside the hair dryer but also needs to ensure the accurate matching of the air guide bracket and the heating bracket. As a result, this installation method makes the connection between the air guide bracket, the heating bracket, and the negative ion generator too complicated, and the installation of the heating bracket and the air guide bracket can easily lead to the failure of the negative ion generator and the negative ion emitting needle.

[0005] Furthermore, in order to ensure that the negative ion generator can be stably installed in the mounting slot, the axial length of the air guide bracket is increased so that as much of the negative ion generator as possible is placed in the mounting slot. The other end of the negative ion generator needs to protrude outside the mounting slot and cooperate with the limiting post of the heating bracket. This installation method increases the axial length of the hair dryer body, which in turn increases the torque required for the user to hold the handle when using the hair dryer, leading to hand fatigue. Utility Model Content

[0006] The purpose of this invention is to provide a hair dryer that solves the problem of overly complicated connection between the air guide bracket, heating bracket, and negative ion generator. By inserting the front end of the negative ion generator into the mounting cavity of the heating bracket, and fixing the rear end to the heating bracket via the circuit board bracket for axial positioning, this installation method achieves the effect of fixing the negative ion generator inside the hair dryer without increasing the axial length of the original head.

[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, a negative ion generator and a circuit board assembly, the hot air assembly including a heating bracket and a heating element fixed to the heating bracket, the heating bracket having a mounting cavity at its center, the front end of the negative ion generator being inserted into the mounting cavity, 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 and axially positioning the rear end of the negative ion generator, the control circuit board being fixed on the side of the circuit board bracket facing away from the heating bracket.

[0008] After adopting the above technical solution, this utility model has the following advantages: The front end of the negative ion generator is inserted into the mounting cavity located in the center of the heating bracket, avoiding the negative ion generator occupying the axial space inside the head. Furthermore, by fixing one side of the circuit board bracket to the heating bracket, the rear end of the negative ion generator is axially positioned in the mounting cavity. This fixation of the circuit board bracket and the heating bracket simultaneously fixes the negative ion generator. This installation method not only avoids occupying the axial space of the head but also simplifies the installation process, preventing interference between the installation of the heating bracket and the circuit board bracket and the installation and fixation of the negative ion generator. This ensures the negative ion generator is stably placed inside the hair dryer, preventing users from experiencing noise from the negative ion generator shaking and colliding with the heating bracket during use. This reduces noise generation and lowers the overall cost. The risk of damage to the negative ion generator due to inter-component collisions is eliminated. The control circuit board is fixed to the side of the circuit board bracket opposite the heating bracket. This circuit board bracket not only fixes the negative ion generator in the mounting cavity but also isolates it from the control circuit board. It easily maintains a space distance of more than 3mm between the rear end of the negative ion generator and the control circuit board, ensuring sufficient distance between them to avoid electromagnetic interference caused by close proximity. Furthermore, since both the negative ion generator and the control circuit board generate heat during operation, maintaining a certain space between them prevents heat accumulation, thereby increasing the lifespan of both the negative ion generator and the control circuit board and avoiding safety hazards. This structure ensures the stable installation of the negative ion generator within the main housing while simplifying the assembly process and improving assembly efficiency. This installation method also ensures that the negative ion generator and the control circuit board do not interfere with each other during operation, improving the user experience and enhancing safety.

[0009] Furthermore, the inner wall of the installation cavity is provided with an elastic positioning arm, which rests against the front end of the negative ion generator.

[0010] Using the aforementioned technical solution, the elastic positioning arm abuts against the front end of the negative ion generator inside the installation cavity, forming a flexible positioning installation with the elastic positioning arm. This allows the negative ion generator to be fixed inside the installation cavity, ensuring its stability within the cavity. Furthermore, when the user shakes or vibrates the hair dryer, the elastic positioning arm can absorb some of the force, reducing direct impact between the negative ion generator and other structures, and extending the service life of the negative ion generator.

[0011] Furthermore, the wall of the first through hole is provided with a positioning rib, which presses against the rear end of the negative ion generator to axially position the negative ion generator in the mounting cavity.

[0012] By adopting the aforementioned technical solution, the positioning rib presses against the rear end of the negative ion generator to prevent the negative ion generator from moving axially within the installation cavity. 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 lowers the risk of damage to the negative ion generator caused by collisions between structures, improving the stability of the negative ion generator within the installation cavity and providing customers with a better user experience.

[0013] Furthermore, the positioning rib is equipped with a first limiting rib to guide the probe harness of the negative ion generator.

[0014] 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.

[0015] Furthermore, the circuit board bracket is provided with a first through hole facing the rear end of the negative ion generator. The wall of the first through hole is provided with multiple lugs, and the first fastener passes through the lugs and is fixedly connected to the heating bracket.

[0016] Using the aforementioned technical solution, 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, 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.

[0017] 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.

[0018] 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.

[0019] Furthermore, a connection channel for outputting negative ions is formed between the control circuit board and the circuit board bracket. The connection channel is connected to the negative ion generator through the first through hole. The heating bracket is provided with a hot air channel, and the handle is provided with an air inlet channel. The air inlet channel is connected to the connection channel. The hot air channel is distributed around the outer periphery of the mounting cavity and is connected to the air inlet channel and the connection channel respectively.

[0020] Using the aforementioned technical solution, the hot air channel surrounds the outer periphery of the mounting cavity and connects to the air inlet channel. Since the air inlet channel is connected to the connecting channel, part of the 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 connecting channel, causing the negatively charged airflow from the connecting channel to flow back into the hot air channel. This negatively charged airflow, after being blown out, 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 it look softer, smoother, and radiating a healthy shine, thus improving the user experience. Furthermore, because the connecting channel is located between the control circuit board and the circuit board support... Between the racks, and since the control circuit board generates heat during operation, the airflow flowing through the connecting channel not only blows negative ions into the hot air channel but also dissipates heat from the control circuit board, ensuring it operates within its optimal temperature range. Simultaneously, this airflow absorbs heat from the control circuit board, thus undergoing initial heating within the heat dissipation channel. When it re-enters the hot air channel through the air outlet, it reaches the set heating temperature more quickly. This not only saves time required for heating the airflow but also improves its utilization rate, allowing for secondary use, optimizing blowing efficiency, enhancing the hairdryer's heating performance, and reducing energy consumption.

[0021] Furthermore, the heating bracket is provided with a positioning boss, and the first through hole forms a positioning groove between two adjacent lugs, and the positioning groove cooperates with the positioning boss.

[0022] By adopting the aforementioned technical solution, the radial positioning of the heating bracket and the circuit board bracket is achieved through the cooperation of the boss and the positioning groove. During the installation of the heating bracket and the circuit board bracket, the positioning groove can be installed on the boss for alignment and positioning first, and then the first fastener can be passed through the lug 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. The cooperation between the positioning groove and the boss not only reduces the generation of noise and avoids unstable connection between the structures, but also simplifies the installation process.

[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 4 As 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 the main housing is provided with a hot air assembly 2, a negative ion generator 3 and a circuit board assembly 4. The hot air assembly 2 includes a heating bracket 21 and a heating element 22 fixed to the heating bracket 21. The heating bracket 21 has a mounting cavity 211 at its center. The front end of the negative ion generator 3 is inserted into the mounting cavity 211. 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 and axially positions the rear end of the negative ion generator 3. The control circuit board 42 is fixed on the side of the circuit board bracket 41 facing away from the heating bracket 21.

[0039] It is understood that the front end of the negative ion generator 3 (the direction described in the embodiment is consistent with the direction indicated in the attached drawings) is inserted into the mounting cavity 211 located in the center of the heating bracket 21, avoiding the negative ion generator occupying the axial space inside the head. Then, by fixing one side of the circuit board bracket 41 to the heating bracket 21, the rear end of the negative ion generator 3 is axially positioned in the mounting cavity 211. This fixation of the circuit board bracket 41 to the heating bracket 21 simultaneously fixes the negative ion generator 3. This installation method not only avoids occupying the axial space of the head but also simplifies the installation process, preventing any interference between the installation of the heating bracket 21 and the circuit board bracket 41 and the installation and fixation of the negative ion generator 3. This ensures the negative ion generator 3 is stably placed inside the hair dryer, preventing the user from experiencing any knocking or noise caused by the negative ion generator 3 shaking and hitting the heating bracket 21 during use, thus reducing noise generation. This also reduces the risk of damage to the negative ion generator 3 caused by collisions between structures. The control circuit board 42 is fixed to the side of the circuit board bracket 41 facing away from the heating bracket 21. 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. It is easy to maintain a space distance 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, avoiding electromagnetic interference caused by the distance between them being too close. In addition, since both the negative ion generator 3 and the control circuit board 42 will generate a certain amount of heat when the hair dryer is working, by maintaining a certain space between the negative ion generator 3 and the control circuit board 42, heat accumulation can be avoided, thereby increasing the service life of the negative ion generator 3 and the control circuit board 42 and avoiding safety hazards. This structure ensures that the negative ion generator 3 is securely installed in the main housing, while also simplifying the assembly process and improving assembly efficiency. Furthermore, 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, thus improving the user experience and making it safer to use.

[0040] like Figures 4 to 6 As shown, in order to better fix the negative ion generator 3 in the mounting cavity 211, a first through hole 413 facing the negative ion generator 3 is provided on the circuit board bracket 41. 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.

[0041] 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.

[0042] The negative ion generator 3 also has a probe 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 harness of the negative ion generator 3. The circuit board bracket 41 is provided with a second limiting rib 416 to guide the probe 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.

[0043] 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.

[0044] To ensure the integrity of the probe wire harness, 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 facing away from the heating bracket. The pressure plate 417 is mainly used to prevent the probe wire harness from being scratched during the assembly of the heating bracket 21 and the circuit board bracket 41.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] Based on the above, a connection channel 43 for outputting negative ions is formed between the control circuit board 42 and the circuit board bracket 41. The connection channel 43 is connected to the negative ion generator 3 through the first through hole 413. The heating bracket 21 is provided with a hot air channel, and the handle 5 is provided with an air inlet channel. The air inlet channel is connected to the connection channel 43. The hot air channels are distributed around the outer periphery of the mounting cavity 211 and are connected to the air inlet channel and the connection channel 43 respectively.

[0051] As described above, the hot air channel surrounds the outer periphery of the mounting cavity 211 and connects to the air inlet channel. Since the air inlet channel is connected to the connecting channel 43, part of the airflow from the air inlet channel flows into the hot air channel, is heated in the hot air channel, and is then blown out; part of the airflow enters the connecting channel 43, causing the airflow carrying negative ions in the connecting channel 43 to flow back into the hot air channel. After the airflow carrying negative ions is blown out, it 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. Furthermore, since the connecting channel 43 is located between the control circuit board 42 and the circuit board bracket 4... Between 1 and 2, and the control circuit board 42 generates a certain amount of heat when working, the airflow flowing through the connecting channel 43 can not only blow negative ions into the hot air channel, but also dissipate heat for the control circuit board 42, ensuring that the control circuit board 42 can work within the optimal temperature range. At the same time, this part of the airflow absorbs the heat of the control circuit board 42, so it is initially heated in the heat dissipation channel. When it enters the hot air channel again through the air outlet 412, 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 hair dryer, and reducing energy consumption.

[0052] like Figure 2 As shown by the dashed line, the connecting channel 43 can also serve as a heat dissipation channel, and the components of the control circuit board 42 are positioned facing the circuit board bracket 41. In other words, the components of the control circuit board 42 are positioned facing the heat dissipation channel. The circuit board bracket 41 is provided with an air inlet 411 and an air outlet 412. The air inlet channel, air inlet 411, heat dissipation channel, and air outlet 412 are connected in sequence to dissipate heat from the components of the control circuit board 42.

[0053] The specific working principle is as follows: When the blower is started, the airflow enters the heat dissipation channel through the air inlet 411 in the air inlet channel inside the handle 5, and then blows out from the air outlet 412, so that the airflow forms a cold air circulation between the circuit board bracket 41 and the control circuit board 42. Since the components of the control circuit board 42 are installed facing the circuit board bracket 41, when the airflow continuously circulates in the heat dissipation channel, 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.

[0054] 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.

[0055] Specifically, the edge of the circuit board bracket 41 is provided with a notch 46, which together with the inner sidewall of the main housing forms an air inlet 411, and the circuit board bracket 41 is provided with a through hole 47 forming an air outlet 412.

[0056] Since the notch 46 is located at the edge of the circuit board bracket 41, the airflow enters the heat dissipation channel directly through the air inlet channel in the handle 5 via the notch 46, 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, optimizing the circulation path of the airflow in the heat dissipation channel, accelerating the airflow rate, and enabling it to carry away the heat of the components on the control circuit board 42 more quickly. 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.

[0057] The notch 46 and the through hole 47 can also have other functions, such as: as through holes for the wire harness of the control circuit board 42.

[0058] 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.

[0059] Among them, the material of the shock absorber 422 is preferably EVA cotton.

[0060] 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.

[0061] likeFigure 5 and Figure 6 As shown, in order to better connect 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, so that a heat dissipation channel can be formed between the circuit board bracket 41 and the control circuit board 42. This allows the airflow between the two to be smoother and accelerates the airflow rate, which can carry away the heat of the components of the control circuit board 42 more quickly. 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.

[0062] 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.

[0063] 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, a negative ion generator 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, a mounting cavity is arranged in the center of the heating support, the front end of the negative ion generator is inserted into the mounting cavity, 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 and axially positions the rear end of the negative ion generator, and the control circuit board is fixed to the side of the circuit board support which is opposite to the heating support.

2. The hair dryer of claim 1, wherein An elastic positioning arm is arranged on the inner wall of the mounting cavity and abuts against the front end of the negative ion generator.

3. The hair dryer of claim 1, wherein A first through hole is arranged on the circuit board support and faces the negative ion generator, a positioning convex rib is arranged on the hole wall of the first through hole, the positioning convex rib abuts against the rear end of the negative ion generator and axially positions the negative ion generator in the mounting cavity.

4. The hair dryer of claim 3, wherein The positioning convex rib is provided with a first limiting rib for guiding the wiring of the probe wire harness of the negative ion generator.

5. The hair dryer of claim 1, wherein, A first through hole is arranged on the circuit board support and faces the rear end of the negative ion generator, a plurality of lugs are arranged on the hole wall of the first through hole, and a first fastener is fixedly connected with the heating support through the lugs.

6. The hair dryer of claim 5, wherein, A second limiting rib for guiding the wiring of the probe wire harness of the negative ion generator is arranged on the side of the circuit board support which faces the heating support and extends along the edge of the first through hole.

7. The hair dryer of claim 5, wherein, An output negative ion connecting channel is formed between the control circuit board and the circuit board support, the connecting channel is communicated with the negative ion generator through the first through hole, the heating support is provided with a hot air channel, the handle is provided with an air inlet channel, the air inlet channel is communicated with the connecting channel, the hot air channel is circumferentially distributed outside the mounting cavity, and the hot air channel is respectively communicated with the air inlet channel and the connecting channel.

8. The hair dryer of claim 5, wherein, The heating support is provided with a positioning boss, the first through hole forms a positioning groove between the adjacent two lugs, and the positioning groove is matched with the positioning boss.

9. The hair dryer of claim 1, wherein, A positioning column is arranged on the side of the circuit board support which faces the control circuit board, and the control circuit board is fixed to the top end of the positioning column.

10. The hair dryer of claim 8, wherein, A limiting column is arranged on the side of the circuit board support which faces the control circuit board, 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.

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