Blowing structure and hair dryer

Abstract

This utility model belongs to the field of home appliance technology, and particularly relates to a blower structure and a blower, comprising: a cylindrical outer shell; and a blower assembly including an air duct structure, a heating element, a fan assembly, and a circuit board. The air duct structure includes a front air duct component and a rear air duct component. The front air duct component is cylindrical and forms a front section air duct, and the rear air duct component is cylindrical and forms a rear section air duct. The front end of the rear air duct component extends outward to form a mounting portion. The heating element is disposed in the front section air duct, the fan assembly is mounted on the front air duct component, and the circuit board is mounted on the side of the mounting portion away from the front air duct component. The circuit board also has a heating element, at least one of which passes through the mounting portion and extends into the front section air duct. The assembly method of this utility model is simpler and more convenient, improving assembly efficiency. Furthermore, the heating element penetrates the mounting portion and extends into the air duct, directly exposing it to the high-speed airflow, thus improving heat dissipation efficiency.

Description

Technical Field

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

[0002] Hair dryers, as a widely used personal care appliance, rely heavily on the rationality and integration of their internal structure for performance. In recent years, as users have increased their demands for wind speed, temperature control accuracy, noise reduction, and portability, the number of internal components in hair dryers has been continuously increasing. This has led to problems such as insufficient heat dissipation of the heating elements inside the hair dryer, and low assembly efficiency caused by a significant increase in structural complexity. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a blower structure and a blower, aiming to solve problems such as insufficient heat dissipation of the heating electrical components inside the blower and low assembly efficiency caused by significantly increased structural complexity.

[0004] A blowing structure, comprising:

[0005] The outer shell is cylindrical.

[0006] A blower assembly, disposed within the structural housing, includes an air duct structure, a heating element, a fan assembly, and a circuit board. The air duct structure includes a front air duct component and a rear air duct component. The front air duct component is cylindrical and forms a front section air duct, with its front end connecting to the front end of the structural housing. The rear air duct component is cylindrical and forms a rear section air duct. The front end of the rear air duct component extends outward to form a mounting portion that connects to the front air duct component. The heating element is disposed in the front section air duct. The fan assembly is mounted on the front air duct component and is used to generate an airflow from rear to front in the rear section air duct. The circuit board is mounted on the side of the mounting portion facing away from the front air duct component. The circuit board also has a heating element, at least one of which passes through the mounting portion and extends into the front section air duct.

[0007] Optionally, the air duct structure further includes a flow guide shroud, which is located inside the front air duct component and integrally connected to the front air duct component, and together with the front air duct component forms an annular air outlet. The flow guide shroud and the front air duct component are provided with multiple spaced connecting parts at the annular air outlet.

[0008] The fan assembly is mounted on the air deflector.

[0009] Optionally, the air deflector protrudes rearward and its diameter gradually decreases from front to back;

[0010] The heating element is arranged in a ring shape and surrounds the periphery of the air guide.

[0011] Optionally, the diameter of the rear section air duct is smaller than the diameter of the front section air duct.

[0012] Optionally, the blowing structure further includes an air inlet assembly;

[0013] The air intake assembly includes an air intake bracket and an air intake rear cover. The air intake bracket is connected to the rear end opening of the structural shell. The air intake bracket has an opening opposite to the rear air duct and protrudes rearward to form an air intake tube. The air intake rear cover is connected to the rear end opening of the structural shell and covers the rear opening of the air intake tube. The air intake rear cover has an annular air inlet, which is offset from the opening in the front-rear direction.

[0014] Optionally, the fan assembly further includes a drive motor, a cyclone separator, and fan blades;

[0015] The drive motor has a rotating shaft;

[0016] The fan blades are connected to the rotating shaft;

[0017] The cyclone is sleeved on the rear air duct and located in front of the fan blade. The cyclone forms an annular flow guiding channel. The cyclone has multiple flow guiding dividing plates arranged in an annular array within the annular flow guiding channel. Each flow guiding dividing plate together divides the annular flow guiding channel into multiple flow guiding sub-channels. The flow guiding dividing plate is an arc-shaped plate, and its rear end and front end are staggered in the front-rear direction.

[0018] Optionally, the blower structure further includes an over-temperature protection switch located in the front air duct, which disconnects the power supply to the heating element when the temperature rises to a preset threshold.

[0019] Optionally, the front air duct component has an installation port on its periphery;

[0020] The blowing structure also includes a temperature detection component, which includes a thermistor and a resistor mounting bracket. The resistor mounting bracket is located on the outer periphery of the front air duct component and has a mounting arm that extends into the front air duct through the mounting port. The thermistor is mounted on the mounting arm and is located inside the front air duct and in front of the heating component.

[0021] Optionally, the front end opening of the front air duct component and the front end opening of the structural housing are connected by a metal ring.

[0022] This utility model provides a hair dryer, including a handle and a blowing structure.

[0023] Based on this invention, firstly, during assembly, the heating element can be installed to the front air duct component, the circuit board to the rear air duct component, and the fan component to either the front or rear air duct component. Then, the front and rear air duct components are assembled, followed by the air blowing assembly. Finally, the air blowing assembly is installed as a whole onto the structural housing. This assembly method is simpler and more convenient than installing the heating element, fan component, and circuit board one by one onto the structural housing, thus improving assembly efficiency and reducing the number of internal connections within the structural housing, thereby simplifying its internal structure. Secondly, the heating electrical element (such as a power transistor) penetrates the mounting portion and extends into the air duct, directly exposing it to the high-speed airflow. Forced heat dissipation is achieved using the high-speed airflow (moving from back to front) within the air duct, avoiding the passive heat dissipation problem of the circuit board in traditional layouts and improving heat dissipation efficiency. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a perspective view of the air blowing structure provided in the embodiment of this utility model;

[0026] Figure 2 This is a partial structural cross-sectional view of the blower structure provided in this embodiment of the utility model, where the air inlet component is not shown.

[0027] Figure 3 This is an exploded view of the blower structure provided in this embodiment of the utility model;

[0028] Figure 4 This is a perspective view of the blower assembly provided in an embodiment of the present utility model;

[0029] Figure 5 yes Figure 4 A stereoscopic image from another perspective;

[0030] Figure 6 This is a perspective view of the air intake assembly provided in an embodiment of the present utility model;

[0031] Figure 7 This is an exploded view of the air intake assembly provided in an embodiment of this utility model;

[0032] Figure 8 This is a cross-sectional view of the fan assembly provided in an embodiment of the present utility model;

[0033] Figure 9 This is an exploded view of the fan assembly provided in an embodiment of the present utility model;

[0034] Figure 10 This is a cross-sectional view of the cyclone provided in this embodiment of the utility model;

[0035] Figure 11 This is an exploded view of the blower structure provided in this embodiment of the utility model, including the front air duct component and the temperature detection component;

[0036] Figure 12 This is a perspective view of the hair dryer provided in an embodiment of this utility model;

[0037] Figure 13 This is a perspective view of the hair dryer provided in an embodiment of this utility model.

[0038] Explanation of icon numbers:

[0039] Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0041] This utility model embodiment provides a blowing structure.

[0042] like Figures 1 to 5 As shown, the blower structure 10 includes a structural housing 100 and a blower assembly 200.

[0043] The outer shell 100 is cylindrical, and the cross-sectional shape of the cylinder can be circular or rectangular. In this embodiment, the outer shell 100 is cylindrical in shape.

[0044] The blower assembly 200 is housed within the structural housing 100 and includes an air duct structure 210, a heating element 220, a fan assembly 230, and a circuit board 240. The air duct structure 210 includes a front air duct component 211 and a rear air duct component 212. The front air duct component 211 is cylindrical and forms a front section of the air duct, with its front opening engaging with the front opening of the structural housing 100. The rear air duct component 212 is cylindrical and forms a rear section of the air duct. The rear section and the front section together form a complete air duct. The front end of the rear air duct component 212 extends outward to form a mounting portion 2121 that connects to the front air duct component 211. The heating element 220 is located in the front air duct, the fan assembly 230 is installed in the air duct structure 210 and is used to generate airflow from back to front in the rear air duct, the circuit board 240 is installed on the side of the mounting part 2121 away from the front air duct component 211, the circuit board 240 also has a heating element 241, at least one of the heating elements 241 passes through the mounting part 2121 and extends to the front air duct.

[0045] It should be noted that the fan assembly 230 is installed on the air duct structure 210, which can be installed on the front air duct component 211 or the rear air duct component 212; in addition, in order to ensure the normal flow of air, there is a gap between the fan assembly 230 and the front and rear air ducts.

[0046] Based on this utility model, firstly, during the assembly process, the heating component 220 can be installed to the front air duct component 211, the circuit board 240 can be installed to the rear air duct component 212, and the fan component 230 can be installed to either the front air duct component 211 or the rear air duct component 212. Then, the front air duct component 211 and the rear air duct component 212 are assembled, and the blowing component 200 is assembled. Finally, the blowing component 200 is installed as a whole to the structural housing 100. In this way, compared to installing the heating component 220, the fan component 230, and the circuit board 240 to the structural housing 100 one by one, the assembly method of the heating component 220, the fan component 230, and the circuit board 240 is simpler and more convenient, thereby improving assembly efficiency, reducing the internal connection structure of the structural housing 100, and simplifying the internal structure of the structural housing 100. Secondly, the heat-generating electrical component 241 (such as a power transistor) penetrates the mounting portion 2121 and extends into the air duct, directly exposing it to the high-speed airflow. The high-speed airflow (moving from back to front) in the air duct is used to force heat dissipation, avoiding the passive heat dissipation problem of the circuit board 240 in the traditional layout, thus improving the heat dissipation efficiency.

[0047] like Figure 2 , Figure 3 and Figure 11As shown in the embodiment of this utility model, the air duct structure 210 further includes a guide shroud 213. The guide shroud 213 is located inside the front air duct component 211 and is integrally connected to the front air duct component 211, forming an annular air outlet 2101 together with the front air duct component 211. The guide shroud 213 and the front air duct component 211 have multiple spaced connecting portions at the annular air outlet 2101. The fan assembly 230 is installed on the guide shroud 213. Based on this, when the airflow enters the annular narrow slit from the wide-diameter air duct at the annular air outlet 2101 formed by the guide shroud 213 and the front air duct component 211, the cross-sectional area decreases sharply, resulting in an increase in flow velocity and significantly improving the wind speed.

[0048] Furthermore, the fairing 213 protrudes rearward and its diameter gradually decreases from front to back;

[0049] The heating element 220 is arranged in a ring shape and surrounds the air deflector 213.

[0050] Based on this, the coaxial nested arrangement of the annular heating element 220 and the air guide 213 ensures that the airflow is heated evenly in 360°, avoiding localized overheating. In addition, the tapered diameter design reduces the volume of the air duct, and together with the annular heating element, forms a compact hot air cavity, shortening the heating path and improving energy efficiency.

[0051] like Figures 2 to 5 As shown in this embodiment of the invention, the diameter of the rear air duct is smaller than that of the front air duct. Based on this, when the airflow reaches the front air duct, it will generate an expansion effect, spreading to the entire area of ​​the heating component 220, forming a "narrow-wide" transition air duct in structure, increasing the airflow coverage area, avoiding dead zones at the edge of the front air duct, and optimizing the uniformity of heat exchange.

[0052] like Figure 1 , Figure 3 , Figure 6 and Figure 7 As shown in this embodiment of the utility model, the blowing structure 10 further includes an air inlet component 300;

[0053] The air intake assembly 300 includes an air intake bracket 310 and an air intake rear cover 320. The air intake bracket 310 is connected to the rear end opening of the structural housing 100. The air intake bracket 310 has an opening 311 that is opposite to the rear air duct and protrudes rearward to form an air intake duct 312. The air intake rear cover 320 is connected to the rear end opening of the structural housing 100 and covers the rear opening of the air intake duct 312. The air intake rear cover 320 has an annular air intake port, which is offset from the opening 311 in the front-rear direction.

[0054] The annular air inlet of the air inlet cover 320 and the opening 311 of the air inlet bracket 310 are misaligned in the front-to-back direction to form a "Z"-shaped airflow channel. The noise generated by the fan needs to be refracted multiple times before it can be transmitted. The sound waves are attenuated in energy during multiple impacts and reflections, and the noise reduction is particularly significant.

[0055] Furthermore, in this embodiment of the invention, sound-absorbing cotton 330 is provided between the air inlet duct 312 and the annular air inlet, which can further reduce noise.

[0056] like Figure 3 and Figure 7 As shown in this embodiment of the utility model, a dustproof net 340 is provided between the air inlet duct 312 and the annular air inlet, which can reduce dust from entering the blower structure 10.

[0057] Please see Figure 3 and Figure 7 In this embodiment of the utility model, the fan assembly 230 further includes a drive motor 231, a cyclone 232, and fan blades 233;

[0058] The drive motor 231 has a rotating shaft 2311;

[0059] Fan blade 233 is connected to rotating shaft 2311;

[0060] Cyclone 232 is sleeved on the rear air duct and located in front of fan blade 233. Cyclone 232 forms an annular flow channel. Cyclone 232 has multiple flow-guiding dividing plates 2321 arranged in an annular array within the annular flow channel. Each flow-guiding dividing plate 2321 divides the annular flow channel into multiple flow-guiding sub-channels. The flow-guiding dividing plate 2321 is an arc-shaped plate, and its rear end and front end are staggered in the front-rear direction.

[0061] Based on this, the arc-shaped flow guide plate 2321 divides the annular flow guide channel into multiple spiral sub-channels, forcing the airflow to rotate and move forward along the arc-shaped flow guide plate 2321, so that the airflow entering the front air duct also rotates and moves forward, increasing the airflow movement path, increasing the contact time between the airflow and the heating component while maintaining the airflow speed, and improving the heating efficiency.

[0062] It should be noted that in this embodiment, the rear air duct is located inside the cyclone 232.

[0063] like Figure 3 As shown in this embodiment of the invention, the blower structure 10 also includes an over-temperature protection switch 400. The over-temperature protection switch 400 is located in the front air duct and disconnects the power supply to the heating component 220 when the temperature rises to a preset threshold. Based on this, the core temperature can be monitored in real time to avoid overheating damage.

[0064] Please see Figure 3 and Figure 11 In this embodiment of the utility model, the front air duct component 211 has an installation port 21101 on its periphery;

[0065] The blowing structure 10 also includes a temperature detection component 500, which includes a thermistor 510 and a resistor mounting bracket 520. The resistor mounting bracket 520 is located on the outer periphery of the front air duct component 211 and has a mounting arm that extends into the front air duct through a mounting port 21101. The thermistor 510 is mounted on the mounting arm and located in the front air duct, in front of the heating component 220. Based on this, firstly, the temperature detection component 500 can accurately detect the real-time temperature of the blown airflow, providing an accurate basis for the heating control of the heating component and helping to achieve more precise temperature control; secondly, compared with directly controlling the heating component, this indirect control method by detecting the temperature of the blown airflow can more effectively control the temperature of the final blown airflow, improving the stability and accuracy of temperature control.

[0066] like Figure 2 and Figure 3 As shown, in this embodiment of the present invention, the front end opening of the front air duct component 211 is connected to the front end opening of the structural housing 100 by a metal ring 600. Thus, the metal ring 600 effectively enhances the stress resistance of the front end opening of the front air duct component 211, thereby preventing deformation under stress.

[0067] like Figure 12 and Figure 13 As shown, this utility model also proposes a hair dryer, which includes a handle 20 and a blowing structure 10. The specific structure of the blowing structure 10 is as described in the above embodiments. Since this hair dryer adopts all the technical solutions of all the above embodiments, it also has all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0068] It should be noted that the control structure can be set on the handle 20 as needed.

[0069] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A blow-off structure, characterized by, include: The outer shell is cylindrical. A blower assembly, disposed within the structural housing, includes an air duct structure, a heating element, a fan assembly, and a circuit board. The air duct structure includes a front air duct component and a rear air duct component. The front air duct component is cylindrical and forms a front section air duct, with its front end connecting to the front end of the structural housing. The rear air duct component is cylindrical and forms a rear section air duct. The front end of the rear air duct component extends outward to form a mounting portion that connects to the front air duct component. The heating element is disposed in the front section air duct. The fan assembly is mounted on the front air duct component and is used to generate an airflow from rear to front in the rear section air duct. The circuit board is mounted on the side of the mounting portion facing away from the front air duct component. The circuit board also has a heating element, at least one of which passes through the mounting portion and extends into the front section air duct.

2. The blow structure of claim 1, wherein The air duct structure also includes a flow guide hood, which is located inside the front air duct component and integrally connected to the front air duct component, and together with the front air duct component forms an annular air outlet. The flow guide hood and the front air duct component are provided with multiple spaced connecting parts at the annular air outlet. The fan assembly is mounted on the air deflector.

3. The blow structure of claim 2, wherein The air deflector protrudes rearward and its diameter gradually decreases from front to back; The heating element is arranged in a ring shape and surrounds the periphery of the air guide.

4. The blow structure of claim 1, wherein The diameter of the rear section air duct is smaller than the diameter of the front section air duct.

5. The blow structure of claim 1, wherein The blowing structure also includes an air inlet assembly; The air intake assembly includes an air intake bracket and an air intake rear cover. The air intake bracket is connected to the rear end opening of the structural shell. The air intake bracket has an opening opposite to the rear air duct and protrudes rearward to form an air intake tube. The air intake rear cover is connected to the rear end opening of the structural shell and covers the rear opening of the air intake tube. The air intake rear cover has an annular air inlet, which is offset from the opening in the front-rear direction.

6. The blow structure of claim 1, wherein The fan assembly also includes a drive motor, a cyclone separator, and fan blades; The drive motor has a rotating shaft; The fan blades are connected to the rotating shaft; The cyclone is sleeved on the rear air duct and located in front of the fan blade. The cyclone forms an annular flow guiding channel. The cyclone has multiple flow guiding dividing plates arranged in an annular array within the annular flow guiding channel. Each flow guiding dividing plate together divides the annular flow guiding channel into multiple flow guiding sub-channels. The flow guiding dividing plate is an arc-shaped plate, and its rear end and front end are staggered in the front-rear direction.

7. The blowing structure as described in claim 1, characterized in that, The blower structure also includes an over-temperature protection switch, which is located in the front air duct and disconnects the power supply to the heating component when the temperature rises to a preset threshold.

8. The blow structure of claim 1, wherein The front air duct component has an installation port on its periphery; The blowing structure also includes a temperature detection component, which includes a thermistor and a resistor mounting bracket. The resistor mounting bracket is located on the outer periphery of the front air duct component and has a mounting arm that extends into the front air duct through the mounting port. The thermistor is mounted on the mounting arm and is located inside the front air duct and in front of the heating component.

9. The blow molding arrangement of claim 1 wherein, The front opening of the front air duct component is connected to the front opening of the outer shell of the structure by a metal ring.

10. A hair dryer characterized by Includes a handle and a blower structure as described in any one of claims 1 to 9.

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