Hair drier capable of optimizing heat dissipation

Abstract

The hair dryer comprises a machine head and a handle, a main air duct is arranged in the machine head, a motor and a heating piece are sequentially arranged in the main air duct in the flowing direction of air flow in the main air duct, a heat dissipation air duct is arranged in the handle, a circuit board is arranged in the heat dissipation air duct, and ventilation holes communicating the main air duct with the heat dissipation air duct are formed in the side wall of the main air duct. The ventilation hole is formed in the upstream of the heating piece, the projection, facing the handle, of the ventilation hole falls into the heat dissipation air channel, the handle is provided with an air outlet hole, and the air outlet area of the air outlet hole is larger than the air inlet area of the ventilation hole. According to the hair dryer, on the basis that heat dissipation of the circuit board in the handle is achieved, the air outlet area of the air outlet hole is larger than the air inlet area of the ventilation hole, airflow flowing into the handle can flow smoothly and can be rapidly exhausted from the air outlet hole, and therefore the heat dissipation efficiency of the circuit board is improved; and the performance and the service life of the circuit board are prevented from being influenced by temperature rise of the circuit board caused by heat accumulation in the handle due to unsmooth exhaust.

Description

Technical Field

[0001] This utility model relates to the field of hair dryers, specifically to a hair dryer with optimized heat dissipation. Background Technology

[0002] The circuit board control components of a high-speed hair dryer generate a lot of heat when they are working. In order to solve the problem of heat dissipation of the circuit board, some existing hair dryers place the circuit board in the main air duct of the head and use the airflow of the hair dryer to reduce the temperature of the circuit board. However, this will make the air duct longer and the head larger, which will make the overall center of gravity higher and affect the user experience.

[0003] To address the aforementioned issues, existing patent CN202110235318.8 discloses a hair dryer that houses the circuit components within the handle. A portion of the airflow entering the head flows into the handle to dissipate heat from the circuit components, thus avoiding the problem of an excessively large head. Specifically, this patent includes a rectifier cover inside the head, with notches forming an air outlet. This outlet allows a portion of the airflow entering the head to flow into the handle and dissipate heat from the circuit components. A ventilation hole is also provided at the bottom of the handle, through which the airflow finally exits. However, due to the mismatch between the air outlet and the ventilation hole, the airflow within the handle cannot flow smoothly, resulting in poor heat dissipation. This affects the effective cooling of the circuit components within the handle, reducing their performance and lifespan. Utility Model Content

[0004] This utility model provides a hair dryer with optimized heat dissipation, aiming to solve the technical problem in existing structures where circuit components are placed inside the handle for heat dissipation, where the air inlet and heat dissipation holes of the handle are mismatched, resulting in the airflow after the circuit components are cooled inside the handle being difficult to expel, thus affecting the heat dissipation effect of the circuit components.

[0005] This utility model discloses a hair dryer with optimized heat dissipation, including a head and a handle. The head has a main air duct, and a motor and a heating element are arranged sequentially in the main air duct along the airflow direction. The handle has a heat dissipation air duct, and a circuit board is arranged in the heat dissipation air duct. The side wall of the main air duct has a ventilation hole connecting the main air duct and the heat dissipation air duct. The ventilation hole is located upstream of the heating element, and the projection of the ventilation hole toward the handle falls into the heat dissipation air duct. The handle has an air outlet, and the air outlet area of ​​the air outlet is larger than the air inlet area of ​​the ventilation hole.

[0006] The optimized heat dissipation hair dryer of this utility model also has the following additional technical features:

[0007] The machine head is equipped with a motor cylinder for installing the motor and a heat insulation cylinder for installing the heating element. The motor cylinder and the heat insulation cylinder are connected to form a main air duct, and the ventilation holes are located on the side wall of the motor cylinder.

[0008] The ventilation hole is located between the air outlet of the motor and the air inlet of the heating element, and the air outlet direction of the ventilation hole is parallel to the axis of the handle.

[0009] A flow guiding gap is provided between the ventilation hole and the top of the circuit board.

[0010] The circuit board is equipped with an IPM at the top, and the ventilation hole is positioned directly opposite the IPM.

[0011] The ventilation hole is one, and the circuit board is equipped with an IPM, with the ventilation hole and the IPM located on the same side; or, the ventilation hole is multiple, respectively arranged on both sides of the circuit board.

[0012] The air outlet is located near the bottom of the handle.

[0013] The air outlet is located on the bottom end face of the handle.

[0014] The air outlets are multiple and arranged around the circuit board.

[0015] The main air duct is equipped with a thyristor that controls the heating element, and the airflow flowing through the main air duct dissipates heat from the thyristor.

[0016] By adopting the above technical solution, this utility model has the following beneficial effects:

[0017] 1. The optimized heat dissipation hair dryer of this utility model allows a portion of the airflow into the head to flow into the handle through the ventilation holes, thereby achieving heat dissipation of the circuit board inside the handle. Furthermore, by making the air outlet area larger than the air inlet area of ​​the ventilation holes, it is beneficial for the airflow into the handle to flow smoothly and be quickly discharged from the air outlet, thereby improving the heat dissipation efficiency of the circuit board and avoiding the accumulation of heat inside the handle due to poor exhaust, which would cause the circuit board to overheat and affect its performance and lifespan.

[0018] The ventilation holes are located upstream of the heating element, and the projection of the ventilation holes toward the handle falls into the heat dissipation channel. This avoids the airflow being heated by the heating element and then flowing into the handle, which would increase the temperature rise of the circuit board. In addition, the airflow can quickly flow into the heat dissipation channel through the ventilation holes, which is beneficial to accelerate the heat dissipation of the circuit board and improve its heat dissipation efficiency.

[0019] 2. In order to reduce the temperature at the ventilation hole and reduce the heat brought into the handle from the ventilation hole, the ventilation hole is set on the side wall of the motor barrel, which is far away from the heating element. This allows the airflow flowing into the handle from the ventilation hole to be at a lower temperature, which is conducive to accelerating the heat dissipation of the circuit board and improving its heat dissipation efficiency.

[0020] Furthermore, the ventilation holes are located between the air outlet of the motor and the air inlet of the heating element. This not only prevents the airflow from carrying heat from the heating element into the handle and increasing the temperature rise of the circuit board, but also allows the ventilation holes to be positioned close to the central axis of the heat dissipation duct so that the airflow flowing into the handle covers the entire heat dissipation duct, improving the uniformity of heat dissipation inside the heat dissipation duct. Moreover, the air outlet direction of the ventilation holes is parallel to the axis of the handle, which facilitates the airflow to flow directly into the heat dissipation duct through the ventilation hole diameter, making the airflow smoother.

[0021] 3. After the airflow passes through the ventilation hole, in order to ensure smooth airflow and improve the heat dissipation effect of the circuit board, a guide gap is provided between the ventilation hole and the top of the circuit board. The guide gap not only facilitates the smooth flow of airflow along the heat dissipation channel after passing through the ventilation hole, but also helps to guide the airflow to be split at the guide gap so that the airflow flows over both sides of the circuit board, thereby ensuring good heat dissipation on both sides of the circuit board.

[0022] 4. Circuit boards are generally equipped with IPMs, which are components that generate a lot of heat. By placing the IPM at the top of the circuit board and setting the ventilation holes directly opposite the IPM, the airflow into the handle can be prioritized to flow through the IPM, thereby achieving rapid heat dissipation of the IPM and improving its heat dissipation effect.

[0023] 5. The number of ventilation holes in this application is not limited. When one ventilation hole is provided, it is preferable to place the ventilation hole on the same side as the IPM. This allows the IPM, which generates a lot of heat, to dissipate heat sufficiently and ensure its performance. When multiple ventilation holes are provided, they can be arranged on both sides of the circuit board. This allows both sides of the circuit board to receive good heat dissipation, thereby improving the overall heat dissipation effect of the circuit board.

[0024] 6. Most users are used to holding the handle at the top. By placing the air vent near the bottom of the handle, the air can be directed away from the grip area, reducing the risk of the air vent being blocked.

[0025] Furthermore, the air outlet is located on the bottom end face of the handle, so that the airflow is discharged straight downward from the air outlet, making the exhaust smoother, and the bottom air outlet can prevent the user's hand from blocking the air outlet.

[0026] Furthermore, the air outlets are multiple and arranged around the circuit board. This distribution helps to guide airflow from both sides of the circuit board and then exhaust it, so that both sides of the circuit board can be well cooled, thereby improving the overall heat dissipation effect of the circuit board.

[0027] 7. The thyristor is also one of the components that generates a lot of heat. By placing the thyristor in the main air duct, the heat dissipation efficiency of the thyristor can be improved because the airflow rate in the main air duct is large per unit time. Attached Figure Description

[0028] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0029] Figure 1 This is a cross-sectional view of the inside of a hair dryer according to one embodiment of this application. The arrows in the figure show the airflow path inside the heat dissipation duct.

[0030] Figure 2 This is a schematic diagram showing the positional relationship between the ventilation holes and the circuit board in one embodiment of this application.

[0031] Figure 3 This is a schematic diagram showing the distribution of multiple ventilation holes in one embodiment of this application.

[0032] Figure 4 for Figure 1 A schematic diagram showing the distribution of multiple air outlets.

[0033] Figure label:

[0034] 10. Head unit; 101. Main air duct; 11. Handle; 12. Motor; 13. Heating element; 14. Heat dissipation air duct; 15. Circuit board; 16. Ventilation hole; 17. Air outlet; 18. Motor cylinder; 19. Heat insulation cylinder; 20. Air guide gap; 21. IPM module. Detailed Implementation

[0035] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0036] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0037] It should be noted that many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0038] Furthermore, it should be understood in the description of this utility model that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two connected entities do not establish a connection relationship through a transitional structure, but are connected solely by a connecting structure to form a whole. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0041] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] like Figures 1 to 4As shown, this application provides a hair dryer with optimized heat dissipation, including a head 10 and a handle 11. The head 10 has a main air duct 101, and a motor 12 and a heating element 13 are arranged sequentially in the main air duct 101 along the airflow direction. The handle 11 has a heat dissipation air duct 14, and a circuit board 15 is arranged in the heat dissipation air duct 14. The side wall of the main air duct 101 has a ventilation hole 16 connecting the main air duct 101 and the heat dissipation air duct 14. The ventilation hole 16 is located upstream of the heating element 13, and the projection of the ventilation hole 16 toward the handle 11 falls into the heat dissipation air duct 14. The handle 11 has an air outlet 17, and the air outlet area of ​​the air outlet 17 is larger than the air inlet area of ​​the ventilation hole 16.

[0043] Specifically, when the hair dryer is working, airflow flows from the air inlet of the head 10 into the main air duct 101. Most of the airflow flows along the main air duct 101, is heated by the heating element 13, and then flows out from the air outlet of the head 10 to provide hot air to the user. Figure 1 As shown, a small portion of the airflow flows into the heat dissipation duct 14 of the handle 11 through the ventilation hole 16, which can dissipate heat from the handle 11 and the circuit board 15. This portion of the airflow finally flows out from the air outlet 17, completing the heat dissipation of the handle 11 and the components inside the handle 11.

[0044] This utility model's optimized heat dissipation hair dryer, by directing a portion of the airflow into the head 10 through the ventilation hole 16 into the handle 11, achieves heat dissipation for the circuit board 15 within the handle 11. Furthermore, by ensuring the exhaust area of ​​the air outlet 17 is larger than the intake area of ​​the ventilation hole 16, the airflow into the handle 11 flows smoothly and is quickly exhausted from the air outlet 17, thereby improving the heat dissipation efficiency of the circuit board 15 and preventing heat accumulation within the handle 11 due to poor exhaust, which could lead to overheating of the circuit board 15 and affect its performance and lifespan. The ventilation hole 16 is located upstream of the heating element 13, and its projection onto the handle 11 falls into the heat dissipation duct 14. This prevents the airflow from being heated by the heating element 13 before flowing into the handle 11, thus avoiding further temperature increases in the circuit board 15. Moreover, the airflow through the ventilation hole 16 quickly flows into the heat dissipation duct 14, accelerating heat dissipation of the circuit board 15 and improving its heat dissipation efficiency.

[0045] It is understandable that the number of ventilation holes 16 and air outlet holes 17 can be one or more. The air outlet area of ​​air outlet hole 17 refers to the total air outlet area of ​​all air outlet holes 17, and the air inlet area of ​​ventilation hole 16 refers to the total air inlet area of ​​all ventilation holes 16. By making the air outlet area of ​​air outlet hole 17 larger than the air inlet area of ​​ventilation hole 16, poor exhaust and reduced air outlet speed can be avoided, which in turn affects heat dissipation efficiency.

[0046] Preferably, the diameter of a single ventilation hole 16 is no more than 5mm, which can reduce the impact on the airflow speed, so that the airflow can quickly flow into the handle 11 to cool the components inside the handle 11, while reducing the temperature rise of the handle 11 and improving the grip experience.

[0047] Based on the circuit board 15 installed inside the heat dissipation duct 14, a thyristor is installed inside the main air duct 101, which can be cooled by the airflow flowing through the main air duct 101. Specifically, a heating module is installed inside the main air duct 101, which includes a bracket and a heating element 13 wound around the bracket. The thyristor is fixed on the bracket, which can achieve good heat dissipation of the heat-generating element without significantly increasing the length of the machine head 10. Since the airflow rate flowing through the main air duct 101 per unit time is large, the heat dissipation efficiency of the thyristor can be improved.

[0048] In a preferred embodiment, the head unit 10 is provided with a motor cylinder 18 for mounting a motor 12 and a heat insulation cylinder 19 for mounting a heating element 13. The motor cylinder 18 and the heat insulation cylinder 19 are connected to form a main air duct 101, and the ventilation hole 16 is provided on the side wall of the motor cylinder 18.

[0049] like Figure 1 As shown, in order to reduce the temperature at the ventilation hole 16 and decrease the heat carried into the handle 11 from the ventilation hole 16, the ventilation hole 16 is located on the side wall of the motor barrel 18, far from the heating element 13. This allows the airflow flowing into the handle 11 from the ventilation hole 16 to have a lower temperature, which is beneficial for accelerating the heat dissipation of the circuit board 15 and improving its heat dissipation efficiency. A portion of the side wall of the motor barrel 18 projects into the heat dissipation duct 14, and the ventilation hole 16 is located on this portion of the side wall of the motor barrel 18. When it is located at the position farthest from the heating element 13, the temperature at the ventilation hole 16 is the lowest, which is more conducive to the heat dissipation of the circuit board 15.

[0050] In a preferred embodiment, the ventilation hole 16 is located between the air outlet of the motor 12 and the air inlet of the heating element 13. Specifically, the motor cylinder 18 includes, for example, a first connecting portion, and the heat insulation cylinder 19 includes a second connecting portion. The second connecting portion is nested inside the first connecting portion, that is, the first connecting portion is located outside the second connecting portion and is less affected by the heating element 13, which allows the temperature of the first connecting portion to be lower than that of other side walls of the motor cylinder 18. The ventilation hole 16 can be provided on the first connecting portion. Furthermore, in order to achieve air outlet, the second connecting portion is provided with a through hole corresponding to the ventilation hole 16, allowing a portion of the airflow entering the head 10 to flow into the handle 11 through the through hole and the ventilation hole 16.

[0051] This configuration not only prevents the airflow from carrying heat from the heating element 13 into the handle 11, thus increasing the temperature rise of the circuit board 15, but also allows the ventilation hole 16 to be positioned close to the central axis of the heat dissipation duct 14, so that the airflow flowing into the handle 11 covers the entire heat dissipation duct 14, improving the uniformity of heat dissipation inside the heat dissipation duct 14.

[0052] Furthermore, the air outlet direction of the ventilation hole 16 is parallel to the axis of the handle 11, which facilitates the airflow to directly enter the heat dissipation channel through the ventilation hole 16, making the airflow smoother.

[0053] In a preferred embodiment, a flow guiding gap 20 is provided between the ventilation hole 16 and the top of the circuit board 15.

[0054] like Figure 2 As shown, the guide gap 20 not only facilitates the smooth flow of airflow through the ventilation hole 16 along the heat dissipation channel 14, but also helps to guide the airflow to be split at the guide gap 20 so that the airflow flows through both sides of the circuit board 15, thereby ensuring good heat dissipation on both sides of the circuit board 15.

[0055] Understandably, heat-generating elements are typically located on both sides of the circuit board 15, such as... Figure 1 and Figure 2 As shown, preferably, the circuit board 15 is arranged laterally along the width direction of the heat dissipation duct 14, which is beneficial for airflow to pass through both sides of the circuit board 15, thereby ensuring that both sides of the circuit board 15 are effectively cooled. Compared with the prior art (the solution disclosed in patent CN202110235318.8), in which the circuit board 15 is arranged longitudinally on one side of the heat dissipation duct 14, which can only achieve single-sided heat dissipation of the circuit board 15, the heat dissipation of the circuit board 15 in this application is more sufficient.

[0056] In a preferred embodiment, the upper end of the circuit board 15 is provided with an IPM module 21, and the ventilation hole 16 is positioned directly opposite the IPM module 21.

[0057] IPM module 21 (i.e., intelligent power module, a highly integrated power electronic device that integrates power switching devices, drive circuits, and fault detection circuits such as overvoltage, overcurrent, and overheating) is a component on circuit board 15 that generates a lot of heat. By placing IPM module 21 at the top of circuit board 15 and setting the ventilation hole 16 directly opposite IPM module 21, the airflow flowing into handle 11 can preferentially flow through IPM module 21, thereby achieving rapid heat dissipation of IPM module 21 and improving its heat dissipation effect.

[0058] It is understandable that the circuit board 15 may have a high-temperature zone and a low-temperature zone. The high-temperature zone contains components with high heat generation, such as the IPM module 21, while the low-temperature zone contains components such as the switching power supply. Preferably, the high-temperature zone and the low-temperature zone are arranged sequentially in the direction away from the ventilation hole 16, so that the airflow into the handle 11 first flows through the high-temperature zone to meet the heat dissipation requirements of the high-temperature zone. The high-temperature zone and the low-temperature zone may be located on the same side of the circuit board 15 or on opposite sides.

[0059] This application does not limit the number of ventilation holes 16. For example, in one embodiment, such as Figure 2 As shown, there is one ventilation hole 16. An IPM module 21 is provided on the circuit board 15. The ventilation hole 16 and the IPM module 21 are located on the same side, which can allow the IPM module 21, which generates a lot of heat, to be fully cooled to ensure its performance.

[0060] Alternatively, in another embodiment, such as Figure 3 As shown, there are multiple ventilation holes 16, which are respectively arranged on both sides of the circuit board 15. This allows both sides of the circuit board 15 to receive good heat dissipation, thereby improving the overall heat dissipation effect of the circuit board 15.

[0061] In a preferred embodiment, the air outlet 17 is located near the bottom of the handle 11.

[0062] It is understandable that users are accustomed to holding the handle 11 at the top. By placing the air vent 17 near the bottom of the handle 11, the air can be directed away from the grip area, reducing the risk of the air vent 17 being blocked.

[0063] In a preferred embodiment, such as Figure 1 As shown, the air outlet 17 is located on the bottom end face of the handle 11, which allows the airflow to flow along the vertical heat dissipation channel 14 and then be discharged straight down from the air outlet 17, making the exhaust smoother. The bottom air outlet can also prevent the user's hand from blocking the air outlet 17.

[0064] Furthermore, such as Figure 4 As shown, there are multiple air outlets 17 arranged around the circuit board 15. This distribution helps guide airflow from both sides of the circuit board 15 and then exhaust it, ensuring good heat dissipation on both sides of the circuit board 15, thereby improving the overall heat dissipation effect of the circuit board 15.

[0065] The technical solutions protected by this utility model are not limited to the above embodiments. It should be noted that any combination of the technical solutions of any embodiment with one or more other embodiments is within the protection scope of this utility model. Although this utility model has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of this utility model are within the scope of protection claimed by this utility model.

Claims

1. A hair dryer with optimized heat dissipation, comprising a head and a handle, wherein the head has a main air duct, and a motor and a heating element are sequentially arranged within the main air duct along the airflow direction; the handle has a heat dissipation air duct, and a circuit board is disposed within the heat dissipation air duct; characterized in that, The side wall of the main air duct is provided with a ventilation hole connecting the main air duct and the heat dissipation air duct. The ventilation hole is located upstream of the heating element, and the projection of the ventilation hole toward the handle falls into the heat dissipation air duct. The handle is provided with an air outlet, and the air outlet area of ​​the air outlet is larger than the air inlet area of ​​the ventilation hole.

2. The hair dryer with optimized heat dissipation according to claim 1, characterized in that, The machine head is equipped with a motor cylinder for installing the motor and a heat insulation cylinder for installing the heating element. The motor cylinder and the heat insulation cylinder are connected to form a main air duct, and the ventilation holes are located on the side wall of the motor cylinder.

3. A hair dryer with optimized heat dissipation according to claim 2, characterized in that, The ventilation hole is located between the air outlet of the motor and the air inlet of the heating element, and the air outlet direction of the ventilation hole is parallel to the axis of the handle.

4. A hair dryer with optimized heat dissipation according to claim 1, characterized in that, A flow guiding gap is provided between the ventilation hole and the top of the circuit board.

5. A hair dryer with optimized heat dissipation according to claim 1, characterized in that, The circuit board is equipped with an IPM at the top, and the ventilation hole is positioned directly opposite the IPM.

6. A hair dryer with optimized heat dissipation according to claim 1, characterized in that, There is one ventilation hole, and an IPM is provided on the circuit board. The ventilation hole and the IPM are located on the same side. Alternatively, there may be multiple ventilation holes, arranged on both sides of the circuit board.

7. A hair dryer with optimized heat dissipation according to claim 1, characterized in that, The air outlet is located near the bottom of the handle.

8. A hair dryer with optimized heat dissipation according to claim 7, characterized in that, The air outlet is located on the bottom end face of the handle.

9. A hair dryer with optimized heat dissipation according to claim 8, characterized in that, The air outlets are multiple and arranged around the circuit board.

10. A hair dryer with optimized heat dissipation according to claim 1, characterized in that, The main air duct is equipped with a thyristor that controls the heating element, and the airflow flowing through the main air duct dissipates heat from the thyristor.

Images