Cavity structure for circulating cooling of PCB (Printed Circuit Board) and blower

Abstract

The utility model discloses a cavity structure for circulating cooling of a PCB (Printed Circuit Board) and a blower. The cavity structure comprises a barrel body, a motor fan blade assembly, a motor frame, a PCB and a heating frame assembly, a mounting cavity is formed in the barrel body, the motor fan blade assembly is provided with an air inlet channel, a circulating air channel is formed between the PCB and the motor frame, the motor fan blade assembly works to enable airflow to enter the barrel body, the airflow enters the mounting cavity along the air inlet channel, and the heating frame assembly is arranged on the mounting cavity. Wherein one part of the airflow is discharged along the area between the heating frame assembly and the mounting cavity, and the other part of the airflow enters the air inlet duct again along the circulating air duct so as to be used for circulating cooling of the PCB. According to the utility model, effective heat dissipation of the PCB is ensured, and part of airflow can repeatedly flow through the PCB through the design of the circulating air duct, so that the heat dissipation effect of the PCB is enhanced, and the resistance of air in the flowing process can be reduced, thereby reducing the noise generated by air flowing.

Description

Technical Field

[0001] The utility model relates to the technical field of hair dryers, in particular to a cavity structure and a hair dryer for circulating cooling of a PCB board. Background Art

[0002] For existing high-speed hair dryers, most of them place high-heat-generating electronic components on the PCB board in the main cavity and then use the air duct for cooling. However, in this design method, there will be a situation of wind resistance and it is easy to generate noise. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a cavity structure and a hair dryer for circulating cooling of a PCB board.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] In the first aspect, an embodiment of the utility model provides a cavity structure for circulating cooling of a PCB board, including: a barrel body, a motor impeller assembly, a motor bracket, a PCB board and a heating rack assembly. An installation cavity is provided inside the barrel body. The motor bracket and the heating rack assembly are installed in the installation cavity. The motor impeller assembly is installed inside the motor bracket. The PCB board is installed outside the motor bracket. The motor impeller assembly is provided with an air inlet duct. A circulating air duct is formed between the PCB board and the motor bracket. The motor impeller assembly works to make air flow into the barrel body. The air flow enters the installation cavity along the air inlet duct. Part of the air flow blows out along the area between the heating rack assembly and the installation cavity. The other part of the air flow enters the air inlet duct again along the circulating air duct for circulating cooling of the PCB board.

[0006] In a specific embodiment, the installation cavity is further provided with a heat insulation cylinder. The heat insulation cylinder is located outside the heating rack assembly and is connected to the motor bracket. The air flow blows out along the area between the heating rack assembly and the heat insulation cylinder.

[0007] In a specific embodiment, the heat insulation cylinder is provided with a plurality of air outlet openings. The air flow blows out along the air outlet openings.

[0008] In a specific embodiment, the heat insulation cylinder is provided with a clamping protrusion, and the motor bracket is provided with a clamping groove corresponding to the clamping protrusion.

[0009] In a specific embodiment, a filter element is further provided at a position of the barrel body near the air inlet duct.

[0010] In a specific embodiment, an air inlet net is further provided between the air inlet duct and the filter element.

[0011] In a specific embodiment, an air inlet bracket is further connected to the position of the motor bracket where the air inlet net is located, and the air inlet net is installed on the air inlet bracket.

[0012] In a specific embodiment, the air inlet net is provided with an air inlet surface, the air inlet surface is arc-shaped, and the air inlet surface is provided with a plurality of air inlet holes.

[0013] In a specific embodiment, the PCB board is connected to the motor bracket by screws.

[0014] The beneficial effects of the cavity structure for circulating cooling of the PCB board of the present utility model compared with the prior art are as follows: By providing an installation cavity inside the barrel body, the motor bracket and the heating bracket assembly are installed in the installation cavity, the motor fan assembly is installed inside the motor bracket, the PCB board is installed outside the motor bracket, the motor fan assembly is provided with an air inlet duct, a circulating air duct is formed between the PCB board and the motor bracket, the motor fan assembly works to make air flow into the barrel body, the air flow enters the installation cavity along the air inlet duct, a part of the air flow exits along the area between the heating bracket assembly and the installation cavity, and another part of the air flow enters the air inlet duct again along the circulating air duct for circulating cooling of the PCB board. That is, while ensuring effective heat dissipation of high-heat-generating electronic components, through the design of the circulating air duct, part of the air flow can flow through the PCB board repeatedly, enhancing the heat dissipation effect of the PCB board, and while ensuring the heat dissipation effect, reducing the resistance of the air flow during the flowing process, thereby reducing the noise generated by the air flow.

[0015] In a second aspect, an embodiment of the present utility model provides a hair dryer, including the cavity structure for circulating cooling of the PCB board as described above.

[0016] The beneficial effects of the hair dryer of the present utility model compared with the prior art are as follows: By providing an installation cavity inside the barrel body, the motor bracket and the heating bracket assembly are installed in the installation cavity, the motor fan assembly is installed inside the motor bracket, the PCB board is installed outside the motor bracket, the motor fan assembly is provided with an air inlet duct, a circulating air duct is formed between the PCB board and the motor bracket, the motor fan assembly works to make air flow into the barrel body, the air flow enters the installation cavity along the air inlet duct, a part of the air flow exits along the area between the heating bracket assembly and the installation cavity, and another part of the air flow enters the air inlet duct again along the circulating air duct for circulating cooling of the PCB board. That is, while ensuring effective heat dissipation of high-heat-generating electronic components, through the design of the circulating air duct, part of the air flow can flow through the PCB board repeatedly, enhancing the heat dissipation effect of the PCB board, and while ensuring the heat dissipation effect, reducing the resistance of the air flow during the flowing process, thereby reducing the noise generated by the air flow and improving the comfort and user experience of using the hair dryer.

[0017] The following further describes the present utility model with reference to the accompanying drawings and specific embodiments. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A three-dimensional schematic diagram of the cavity structure for cyclic cooling of a PCB board provided by the present invention;

[0020] Figure 2 A cross-sectional schematic diagram of the cavity structure for cyclic cooling of a PCB board provided by the present invention;

[0021] Figure 3 An exploded schematic diagram of the cavity structure for cyclic cooling of a PCB board provided by the present invention. Detailed Embodiments

[0022] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0025] In addition, 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 quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless specifically defined otherwise.

[0026] In the present utility model, unless otherwise clearly specified and defined, the terms such as "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0028] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0029] See Figures 1 to 3In the specific embodiment shown, the present utility model discloses a cavity structure for the cyclic cooling of a PCB board, comprising: a barrel body 10, a motor fan assembly 20, a motor bracket 30, a PCB board 40, and a heating bracket assembly 50. An installation cavity is provided inside the barrel body 10, the motor bracket 30 and the heating bracket assembly 50 are installed in the installation cavity, the motor fan assembly 20 is installed inside the motor bracket 30, the PCB board 40 is installed outside the motor bracket 30, the motor fan assembly 20 is provided with an air inlet duct 21, a cyclic air duct 60 is formed between the PCB board 40 and the motor bracket 30, and the motor fan assembly 20 operates to enable air flow to enter the barrel body 10. The air flow enters the installation cavity along the air inlet duct 21, and a part of the air flow exits through the area between the heating bracket assembly 50 and the installation cavity, while another part of the air flow re-enters the air inlet duct 21 along the cyclic air duct 60 for the cyclic cooling of the PCB board 40.

[0030] Specifically, by providing an installation cavity inside the barrel body 10, installing the motor bracket 30 and the heating bracket assembly 50 in the installation cavity, installing the motor fan assembly 20 inside the motor bracket 30, installing the PCB board 40 outside the motor bracket 30, providing an air inlet duct 21 in the motor fan assembly 20, forming a cyclic air duct 60 between the PCB board 40 and the motor bracket 30, and operating the motor fan assembly 20 to enable air flow to enter the barrel body 10, the air flow enters the installation cavity along the air inlet duct 21. A part of the air flow exits through the area between the heating bracket assembly 50 and the installation cavity, while another part of the air flow re-enters the air inlet duct 21 along the cyclic air duct 60 for the cyclic cooling of the PCB board 40. That is, while ensuring the effective heat dissipation of high-heat-generating electronic components, through the design of the cyclic air duct 60, part of the air flow can flow through the PCB board 40 repeatedly, enhancing the heat dissipation effect of the PCB board 40, and while ensuring the heat dissipation effect, reducing the resistance of the air flow during the flow process, thereby reducing the noise generated by the air flow. In addition, the cyclic cooling mechanism helps to keep the PCB board 40 within a suitable working temperature range, prevent performance degradation or damage caused by overheating, and this technology allows for an efficient heat dissipation and cooling design in a limited space, providing greater flexibility for product design.

[0031] In an embodiment, the installation cavity is further provided with a heat insulation cylinder 70. The heat insulation cylinder 70 is located outside the heating bracket assembly 50 and is connected to the motor bracket 30, and the air flow exits through the area between the heating bracket assembly 50 and the heat insulation cylinder 70.

[0032] Specifically, the main function of the heat insulation cylinder 70 is to form a heat insulation layer between the heating rack assembly 50 and the cylinder body 10, reducing the direct conduction of heat from the heating rack assembly 50 to the cylinder body 10. That is, by improving the heat insulation effect, the flow of heat can be better controlled, ensuring that the heat is mainly concentrated in the heating rack assembly 50 and the areas near it, avoiding the disorderly diffusion of heat in the entire installation cavity, and thus improving the overall heat dissipation efficiency. In addition, the air flow blows out along the area between the heating rack assembly 50 and the heat insulation cylinder 70. This design helps to quickly take away the heat generated by the heating rack assembly 50 and discharge it through a specific air duct. At the same time, due to the presence of the heat insulation cylinder 70, the air flow can maintain a certain speed and temperature gradient when flowing through the heating rack assembly 50, which is beneficial to forming a stable air flow cycle and improving the heat dissipation effect. In addition, the heat insulation cylinder 70 can also reduce the vibration and noise generated by the heating rack assembly 50 to a certain extent. Through its vibration isolation and sound insulation effects, the overall quality and user experience of the product can be improved. Especially under high-speed or high-load working conditions, the vibration isolation effect of the heat insulation cylinder 70 is more obvious, which helps to protect other components from vibration damage. In addition, the connection design between the heat insulation cylinder 70 and the motor rack 30 not only enhances the stability of the internal structure of the installation cavity, but also makes the entire heat dissipation system more compact and reliable. This design helps to reduce the risk of component loosening or damage caused by vibration or external forces, and improves the service life and reliability of the product.

[0033] In one embodiment, the heat insulation cylinder 70 is provided with a plurality of air outlets 71, and the air flow blows out along the air outlets 71.

[0034] Specifically, the air outlets 71 provided on the heat insulation cylinder 70 can precisely control the flow direction and distribution of the air flow. By reasonably designing the number and position of the air outlets 71, it can be ensured that the air flow can evenly cover the hair to be dried, thereby improving the hair drying efficiency. In addition, when the air flow blows out through the air outlets 71 of the heat insulation cylinder 70, due to the guiding effect of the heat insulation cylinder 70 on the air flow, the air flow can be made more concentrated and powerful. This concentrated and powerful air flow can quickly take away the moisture on the hair surface, thus accelerating the hair drying process. In addition, in products such as hair dryers, the main function of the heat insulation cylinder 70 is still heat insulation. By providing air outlets 71, the generated hot air flow can be guided to the outside without affecting the heat insulation effect, avoiding overheating damage to the heating elements inside the product. In addition, the design of the air outlets 71 can also consider factors such as noise control and wind speed adjustment. By optimizing the shape and size of the air outlets 71, the noise generated when the air flow passes through can be reduced, improving the comfort of use. At the same time, combined with the wind speed adjustment function, users can choose the appropriate wind speed and temperature according to their own needs, further enhancing the user experience.

[0035] In one embodiment, the heat insulation cylinder 70 is provided with a clamping projection 72, and the motor bracket 30 is provided with a clamping groove 31 corresponding to the clamping projection 72.

[0036] Specifically, the design of the clamping projection 72 and the clamping groove 31 enables a firm connection to be formed between the heat insulation cylinder 70 and the motor bracket 30. This connection method not only simplifies the installation process, but also improves the connection strength between components, reducing the risk of failures caused by loosening or detachment. Additionally, through the corresponding design of the clamping projection 72 and the clamping groove 31, it can be ensured that the heat insulation cylinder 70 can be accurately aligned and fixed on the motor bracket 30 during installation, avoiding misalignment or deviation during the installation process. Moreover, the firm connection can reduce the vibration transmission between the heat insulation cylinder 70 and the motor bracket 30, thereby reducing the noise and vibration levels during product operation, which is of great significance for enhancing the user experience. In addition, the firm connection between the heat insulation cylinder 70 and the motor bracket 30 helps to maintain the smooth flow of air, avoiding the phenomenon of air flow obstruction caused by loose components, which helps to improve the heat dissipation efficiency of the product and ensure that the product can maintain a stable working state during high-load operation.

[0037] In one embodiment, a filter element 80 is further provided at a position of the cylinder body 10 near the air inlet duct 21.

[0038] Specifically, the main function of the filter element 80 is to filter out impurities such as dust, particulate matter, and hair in the air flow entering the cylinder body 10. If these impurities directly enter the air inlet duct 21, they may adhere to internal components such as the motor impeller assembly 20 and the PCB board 40, affecting their normal operation and heat dissipation effect. Through the filtering action of the filter element 80, it can be ensured that the air flow entering the air inlet duct 21 is relatively clean, reducing the pollution and damage of impurities to internal components. Additionally, since the filter element 80 can block most impurities from entering the interior of the cylinder body 10, it can reduce the cleaning burden of internal components, lower the risk of failures caused by the accumulation of impurities, and thus extend the service life of the product. Moreover, the filter element 80 also has a certain noise reduction function, which can reduce the noise level during product operation by absorbing or dispersing the noise components in the air flow, which is of great significance for enhancing the user experience. And the filter element 80 is usually designed as a detachable and replaceable structure, facilitating users to clean and maintain; at the same time, the appearance of the filter element 80 can also match the overall design style of the product, enhancing the aesthetics and grade of the product.

[0039] In one embodiment, an air inlet net 90 is further provided between the air inlet duct 21 and the filter element 80.

[0040] Specifically, an air inlet net 90 is added between the air inlet duct 21 and the filter element 80, which can form a double filtration of the incoming air flow. The air inlet net 90 can further block and filter out tiny particulate matters, dust and other impurities in the air, ensuring that the air flow entering the air inlet duct 21 is cleaner. This multiple filtration mechanism can provide a higher level of air purification effect and protect the internal components of the product from pollution. In addition, the design of the air inlet net 90 can also guide the incoming direction of the air flow, making the air flow more evenly distributed to the air inlet duct 21, reducing local overheating or wear problems caused by uneven air flow distribution.

[0041] In one embodiment, an air inlet support 100 is further connected to the motor bracket 30 at the position of the air inlet net 90, and the air inlet net 90 is installed on the air inlet support 100.

[0042] Specifically, the air inlet support 100 provides a stable support platform for the air inlet net 90, ensuring that the air inlet net 90 can be firmly installed in the predetermined position and will not loosen or fall off due to the impact of the air flow or the vibration of the product. This stable support helps to maintain the integrity of the internal structure of the product and improve the overall stability and reliability of the product. In addition, the design of the air inlet support 100 can guide the air flow to pass through the air inlet net 90 more smoothly and enter the air inlet duct 21. By reasonably designing the shape and position of the air inlet support 100, the air flow path can be optimized, reducing the air flow resistance and turbulence phenomenon, thereby improving the air flow circulation efficiency and heat dissipation effect.

[0043] In one embodiment, the air inlet net 90 is provided with an air inlet surface, the air inlet surface is arc-shaped, and a plurality of air inlet holes are provided on the air inlet surface.

[0044] Specifically, the arc-shaped air inlet surface design can better guide the air flow, making the air flow enter the product interior more smoothly. This design can reduce the air flow resistance and turbulence phenomenon, improve the air intake efficiency, and ensure sufficient air flow supply inside the product. In addition, the arc-shaped design also helps to reduce the noise generated when the air flow passes through. Compared with the flat shape, the arc-shaped design can better disperse the impact force of the air flow and reduce the sharp change of the air flow, thereby reducing the noise level. In addition, a plurality of air inlet holes are provided on the air inlet surface. These air inlet holes not only serve as air flow channels, but also increase the contact area between the filter and the air flow. A larger contact area means that more impurities can be intercepted and filtered out, thereby improving the filtering effect. In addition, by reasonably designing the size and distribution of the air inlet holes, the air flow quality entering the product interior can be further controlled. Smaller air inlet holes can block finer particulate matters from entering the product interior and improve the filtering accuracy.

[0045] In one embodiment, the PCB board 40 is connected to the motor bracket 30 by screws.

[0046] Specifically, the screw connection is a firm and reliable connection method. By fixing the PCB board 40 to the motor bracket 30 with screws, it can ensure that the PCB board 40 will not loosen or fall off due to vibration or impact during the operation of the product. This stable connection helps to maintain the integrity of the internal structure of the product and improve the overall stability and reliability of the product. In addition, the screw connection is relatively simple. Only need to place the PCB board 40 in the predetermined position and use screws to fix it. This installation method does not require complex tools or technologies, reducing the installation difficulty and cost.

[0047] Specifically, both the motor impeller assembly 20 and the heating rack assembly 50 adopt existing publicly known technologies and will not be elaborated here too much.

[0048] The present utility model also discloses a hair dryer, including the cavity structure for circulating cooling the PCB board 40 as described above.

[0049] Specifically, an installation cavity is provided inside the barrel body 10. The motor bracket 30 and the heating rack assembly 50 are installed in the installation cavity. The motor impeller assembly 20 is installed inside the motor bracket 30, and the PCB board 40 is installed outside the motor bracket 30. The motor impeller assembly 20 is provided with an air inlet duct 21. A circulating air duct 60 is formed between the PCB board 40 and the motor bracket 30. The motor impeller assembly 20 works to make the air flow into the barrel body 10. The air flow enters the installation cavity along the air inlet duct 21. Part of the air flow blows out along the area between the heating rack assembly 50 and the installation cavity, and the other part of the air flow enters the air inlet duct 21 again along the circulating air duct 60 for circulating cooling the PCB board 40. That is, while ensuring that the high-heat-generating electronic components are effectively cooled, through the design of the circulating air duct 60, part of the air flow can flow through the PCB board 40 repeatedly, enhancing the heat dissipation effect of the PCB board 40, and being able to reduce the resistance of the air during the flowing process while ensuring the heat dissipation effect, thereby reducing the noise generated by the air flow and improving the use comfort and user experience of the hair dryer.

[0050] The above embodiments are the preferred implementation solutions of the present utility model. In addition, the present utility model can also be implemented in other ways. Any obvious replacement without departing from the concept of the technical solution is within the protection scope of the present utility model.

Claims

1. A cavity structure for PCB board circulation cooling, characterized in that: include: A barrel body, a motor fan blade assembly, a motor frame, a PCB board and a heating frame assembly, wherein an installation cavity is provided inside the barrel body, the motor frame and the heating frame assembly are installed in the installation cavity, the motor fan blade assembly is installed on the inner side of the motor frame, the PCB board is installed on the outer side of the motor frame, the motor fan blade assembly is provided with an air inlet duct, a circulating air duct is formed between the PCB board and the motor frame, the motor fan blade assembly works to allow air flow to enter the barrel body, and the air flow enters the installation cavity along the air inlet duct, wherein a part of the air flow is discharged along the area between the heating frame assembly and the installation cavity, and another part of the air flow enters the air inlet duct again along the circulating air duct, so as to be used for circulating and cooling the PCB board.

2. The cavity structure for PCB board circulation cooling according to claim 1 is characterized in that: The installation cavity is further provided with an insulation tube, which is located outside the heating frame assembly and connected to the motor frame. The airflow is discharged along the area between the heating frame assembly and the insulation tube.

3. The cavity structure for PCB board circulation cooling according to claim 2 is characterized in that: The heat-insulating cylinder is provided with a plurality of air outlets, and the airflow is blown out along the air outlets.

4. The cavity structure for PCB board circulation cooling according to claim 2 is characterized in that: The heat insulation cylinder is provided with a clamping protrusion, and the motor frame is provided with a clamping groove corresponding to the clamping protrusion.

5. The cavity structure for PCB board circulation cooling according to claim 2 is characterized in that: A filter element is also provided on the cylinder body near the air inlet.

6. The cavity structure for PCB board circulation cooling according to claim 5 is characterized in that: An air inlet net is also provided between the air inlet duct and the filter element.

7. The cavity structure for PCB board circulation cooling according to claim 6 is characterized in that: The motor frame is located at the position of the air inlet net and is also connected to an air inlet bracket, and the air inlet net is installed on the air inlet bracket.

8. The cavity structure for PCB board circulation cooling according to claim 6 is characterized in that: The air inlet net is provided with an air inlet surface, the air inlet surface is in an arc shape, and the air inlet surface is provided with a plurality of air inlet holes.

9. The cavity structure for PCB board circulation cooling according to claim 1 is characterized in that: The PCB board is connected to the motor frame through screws.

10. A hair dryer, characterized in that: It comprises a cavity structure for circulating cooling of a PCB board as described in any one of claims 1 to 9.

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