Hair dryer

Abstract

The utility model relates to the technical field of household appliances, disclose a kind of hair dryer. Hair dryer includes: blow tube, inner cavity forms air supply air duct, the first end of blow tube is equipped with the air outlet that is communicated with air supply air duct, the side portion of blow tube is equipped with the air inlet air duct that is communicated with air supply air duct;The cross-sectional area of the air outlet end of air inlet air duct is less than the cross-sectional area of the air inlet end of air inlet air duct;Handle, one end is connected at air inlet air duct, the other end is equipped with first air inlet, the inner cavity of handle is respectively communicated with first air inlet and air inlet air duct;Hot air device, it is formed on the air guide path between first air inlet and air outlet, the utility model designs the cross-sectional area of the air outlet end of air inlet air duct as less than the cross-sectional area of the air inlet end of air inlet air duct, using the principle that fluid flow through narrow channel speed up, so that hot air flow has higher initial wind speed when entering air supply air duct after passing through air inlet air duct, to improve the air outlet speed and air outlet of hair dryer.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, specifically to a hair dryer. Background Technology

[0002] The main working principle of a hair dryer is that the motor drives the fan to rotate, and the fan draws in outside air into the hair dryer. The air is then heated by the heating element and blown out through the nozzle, thus quickly drying the hair.

[0003] Current hair dryers suffer from inadequate airflow design, resulting in insufficient air speed and volume, which negatively impacts the user experience. Utility Model Content

[0004] In view of this, the present invention provides a hair dryer to solve the problem that the current hair dryers are limited by the unreasonable design of the air duct structure, resulting in insufficient air speed and air volume.

[0005] This utility model provides a hair dryer, comprising: A hair dryer has an inner cavity forming an air supply duct. The first end of the hair dryer is provided with an air outlet communicating with the air supply duct, and the side of the hair dryer is provided with an air inlet duct communicating with the air supply duct. The cross-sectional area of ​​the air outlet end of the air inlet duct is smaller than the cross-sectional area of ​​the air inlet end of the air inlet duct. The handle has one end connected to the air inlet duct and the other end provided with a first air inlet. The inner cavity of the handle is connected to the first air inlet and the air inlet duct respectively. A hot air device is disposed on the air guide path formed between the first air inlet and the air outlet. The hot air device is used to convert the airflow entering from the first air inlet into hot air on the air guide path, and to transport the airflow through the air inlet duct to the air outlet duct, so as to form a spiral hot airflow in the air outlet duct.

[0006] Beneficial effects: This utility model provides a hair dryer in which the cross-sectional area of ​​the air outlet end of the air inlet duct is designed to be smaller than the cross-sectional area of ​​the air inlet end of the air inlet duct. By utilizing the principle that the flow velocity of fluid increases when it flows through a narrow channel, the hot airflow has a higher initial wind speed when it enters the air delivery duct after passing through the air inlet duct, thereby improving the air outlet speed and air volume of the hair dryer.

[0007] In one alternative implementation, the cross-sectional area of ​​the air inlet duct gradually decreases from the air inlet end to the air outlet end.

[0008] Beneficial effects: The cross-sectional area of ​​the air inlet duct is designed to gradually decrease from the air inlet end to the air outlet end, which avoids turbulence in the hot air flow in the air inlet duct, thereby improving the smoothness of the hot air flow in the air inlet duct.

[0009] In one optional embodiment, the ratio of the cross-sectional area of ​​the air outlet end of the air inlet duct to the cross-sectional area of ​​the air inlet end of the air inlet duct is 1:2.

[0010] In one optional embodiment, the side of the hair dryer is provided with an airflow inlet, and an interface structure is fixedly provided on the part of the hair dryer located on the outer periphery of the airflow inlet, and the interface structure is fixedly connected to the handle. The air inlet duct is fixedly installed inside the interface structure. The air inlet end of the air inlet duct is connected to the inner cavity of the handle, and the air outlet end of the air inlet duct is connected to the airflow inlet.

[0011] Beneficial effects: The interface structure on the side of the hair dryer facilitates connection between the hair dryer and the handle, and by placing the air inlet duct inside the interface structure, the air inlet duct can be hidden, improving the overall aesthetics of the hair dryer.

[0012] In one optional embodiment, the hot air device is disposed inside the handle and is used to convert the airflow entering from the first air inlet into hot air, and then transport the hot air through the air inlet duct to the air outlet duct to form a spiral hot airflow in the air outlet duct.

[0013] Beneficial effects: By placing the handle on the side of the hair dryer and setting the air inlet (the first air inlet) on the handle, with the hot air device inside the handle, the airflow enters through the first air inlet and is converted into hot air by the hot air device. The airflow is then exited through the air outlet on the hair dryer. This greatly increases the airflow path, resulting in a gentler temperature of the hot airflow exiting the air outlet at the end of the hair dryer, ensuring that the hot airflow will not damage the scalp and hair.

[0014] In one alternative embodiment, the hot air device includes: A heating element is disposed inside the handle; A fan is installed inside the handle. The fan is used to draw air from the external environment into the handle through the first air inlet and guide it to the heating element, and deliver the hot air heated by the heating element into the air supply duct.

[0015] Beneficial effects: By placing both the heating element and the fan inside the handle, the center of gravity of the hair dryer is shifted to the handle, resulting in a better user experience; it also facilitates the connection of electrical components such as the heating element and the fan to external circuits; and it also makes it easier to assemble and disassemble the handle from the hair dryer.

[0016] In one alternative embodiment, the heating element is located near one end of the blower, and the fan is located between the first air inlet and the heating element.

[0017] Beneficial effects: By placing the heating element near the blower and the fan near the first air inlet, the fan is positioned upstream of the heating element along the airflow direction. This ensures that the airflow passing through the fan is at room temperature, and the fan itself will not come into contact with the high-temperature airflow. This avoids overheating damage to the fan caused by the high-temperature airflow and ensures the service life of the fan.

[0018] In one optional embodiment, a control board is further provided inside the handle. The control board is located between the fan and the heating element and is electrically connected to both the fan and the heating element.

[0019] Beneficial effects: Placing the control board between the fan and the heating element facilitates electrical connections between the control board and both the fan and the heating element. Simultaneously, by positioning the control board upstream of the heating element, it ensures that the airflow passing through the control board is at room temperature, preventing the control board itself from coming into contact with high-temperature airflow. This avoids overheating damage to the control board and extends its service life.

[0020] In one alternative embodiment, the handle has a grip section and an air inlet section, the grip section being disposed near the air inlet duct, the air inlet section being located at the end of the grip section away from the blower, and the first air inlet being configured to surround a plurality of air inlet holes disposed around the outer periphery of the air inlet section.

[0021] Beneficial effects: The grip section makes it easy for users to hold, and by placing the first air inlet on the air inlet section, it avoids the user's hand from blocking the first air inlet when using it.

[0022] In one alternative embodiment, the handle further includes a heating element mounting section located at one end of the grip section near the hairdryer and connected to the side of the hairdryer, the heating element being disposed within the heating element mounting section.

[0023] Beneficial effect: Prevents the heating element from being located inside the grip section and getting too hot for the user to handle. Attached Figure Description

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

[0025] Figure 1 A schematic diagram of the structure of a hair dryer provided by this utility model; Figure 2 A cross-sectional view of a hair dryer provided by this utility model; Figure 3 for Figure 2 A magnified view of part A in the diagram; Figure 4 A schematic diagram illustrating the airflow direction of a hair dryer provided by this utility model; Figure 5 Another longitudinal sectional view of the hair dryer provided by this utility model; Figure 6 A schematic diagram of the structure of the hair dryer provided by this utility model; Figure 7 A simulation diagram of airflow effect of a hair dryer provided for this utility model; Figure 8 A longitudinal sectional view of the hair dryer provided by this utility model; Figure 9 A cross-sectional view of the hair dryer provided by this utility model; Figure 10 Another longitudinal sectional view of the hair dryer provided by this utility model; Figure 11 A longitudinal sectional view of the hair dryer provided by this utility model (without end caps). Figure 12 A schematic diagram of the end cap provided by this utility model.

[0026] Explanation of reference numerals in the attached figures: 100. Hair dryer; 101. Air supply duct; 102. Air inlet duct; 1021. Air outlet; 1022. Air inlet; 103. First inner wall section; 104. Second inner wall section; L1. First section; L2. Second section; 110. Air outlet; 120. Second air inlet; 130. Airflow inlet; 140. Interface structure; 150. Inner cylinder; 160. Outer cylinder; 170. Opening; 180. Internal thread; 200. Handle; 210. First air inlet; 300. Hot air device; 310. Heating element; 320. Fan; 400. Control panel; 500, end cap; 510, external thread. Detailed Implementation

[0027] 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, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0031] The following is combined Figures 1-12 The following describes embodiments of the present invention.

[0032] According to an embodiment of the present invention, a hair dryer is provided, comprising: a hair dryer 100, a handle 200, and a hot air device 300.

[0033] The inner cavity of the hair dryer 100 forms an air supply duct 101. The first end of the hair dryer 100 has an air outlet 110 communicating with the air supply duct 101, and the side of the hair dryer 100 has an air inlet duct 102 communicating with the air supply duct 101. The cross-sectional area of ​​the air outlet 1021 of the air inlet duct 102 is smaller than the cross-sectional area of ​​the air inlet duct 1022. One end of the handle 200 is connected to the air inlet duct 102, and the other end has a first air inlet. The inner cavity of the port 210 and the handle 200 are respectively connected to the first air inlet 210 and the air inlet duct 102; the hot air device 300 is disposed on the air guide path formed between the first air inlet 210 and the air outlet 110. The hot air device 300 is used to convert the airflow entering from the first air inlet 210 into hot air on the air guide path, and to transport the airflow through the air inlet duct 102 to the air supply duct 101, so as to form a spiral hot airflow in the air supply duct 101.

[0034] In the above embodiment, the cross-sectional area of ​​the air outlet 1021 of the air inlet duct 102 is designed to be smaller than the cross-sectional area of ​​the air inlet duct 1022. By utilizing the principle that the flow velocity of fluid increases when it flows through a narrow channel, the hot airflow has a higher initial wind speed when it enters the air supply duct 101 after passing through the air inlet duct 102, thereby increasing the air outlet speed and air volume of the blower.

[0035] Furthermore, by setting an air inlet duct 102 connected to the air supply duct 101, hot air is transported to the air supply duct 101 through the air inlet duct 102. Under the air supply action of the air supply duct 101, the heated hot air airflow forms a spiral hot air airflow in the air supply duct 101, which has a greater air velocity and air volume than the direct airflow, thereby improving the blowing efficiency.

[0036] Specifically, the air outlet 1021 of the air inlet duct 102 is the connection point between the air inlet duct 102 and the air supply duct 101 on the inner wall of the blower 100, and the air inlet duct 1022 is the connection point between the air inlet duct 102 and the inner cavity of the handle 200.

[0037] Furthermore, the air inlet duct 102 is set as a transition section between the inner cavity of the handle 200 and the air outlet duct 101, which is used to guide the hot airflow from the inner cavity of the handle 200 into the air outlet duct 101 to form a spiral hot airflow. The airflow entering the blower from the first air inlet 210 passes through the inner cavity of the handle 200, the air inlet duct 102 and the air outlet duct 101 in sequence, and is finally discharged from the air outlet 110 at the end of the blower tube 100 that connects to the air outlet 110 of the air outlet duct 101.

[0038] In some embodiments, the cross-sectional area of ​​the air inlet duct 102 gradually decreases from the air inlet end 1022 to the air outlet end 1021.

[0039] In the above embodiment, the cross-sectional area of ​​the air inlet duct 102 is designed to gradually decrease from the air inlet end 1022 to the air outlet end 1021, so as to avoid the hot air flow in the air inlet duct 102 from becoming turbulent, thereby improving the smoothness of the hot air flow in the air inlet duct 102.

[0040] Specifically, the air inlet duct 102 is arranged in a cone shape without a sharp point. As an alternative implementation, the air inlet duct 102 is arranged in a stepped manner, with the cross-sectional area of ​​the sidewall of each layer of the air inlet duct 102 decreasing sequentially.

[0041] In some embodiments, the ratio of the cross-sectional area of ​​the air outlet 1021 of the air inlet duct 102 to the cross-sectional area of ​​the air inlet duct 102's air inlet 1022 is 1:2.

[0042] In some embodiments, the side of the hair dryer 100 is provided with an airflow inlet 130, and an interface structure 140 is fixedly provided on the part of the hair dryer 100 located on the outer periphery of the airflow inlet 130. The interface structure 140 is fixedly connected to the handle 200. The air inlet duct 102 is fixedly provided in the interface structure 140. The air inlet end 1022 of the air inlet duct 102 is connected to the inner cavity of the handle 200, and the air outlet end 1021 of the air inlet duct 102 is connected to the airflow inlet 130.

[0043] In the above embodiments, the interface structure 140 provided on the side of the hair dryer 100 facilitates the connection between the hair dryer 100 and the handle 200. Furthermore, by setting the air inlet duct 102 inside the interface structure 140, the air inlet duct 102 can be hidden, improving the overall aesthetics of the hair dryer.

[0044] Specifically, the interface structure 140 is integrally formed on the side of the hair dryer 100.

[0045] In some embodiments, the hot air device 300 is disposed in the handle 200 and is used to convert the airflow entering from the first air inlet 210 into hot air, and then deliver the hot air through the air inlet duct 102 to the air outlet duct 101 to form a spiral hot airflow in the air outlet duct 101.

[0046] In the above embodiment, the handle 200 is set on the side of the hair dryer 100, and the air inlet position of the hair dryer, i.e., the first air inlet 210, is set on the handle 200, and the hot air device 300 is set inside the handle 200. After the airflow enters from the first air inlet 210, it is converted into hot air by the hot air device 300 and is discharged from the air outlet position, i.e., the air outlet 110, set on the hair dryer 100. The guide path of the hot airflow is greatly increased, so that the temperature of the hot airflow discharged from the air outlet 110 at the end of the hair dryer 100 is mild, ensuring that the hot airflow will not damage the scalp and hair.

[0047] Specifically, the hot air device 300 is located in the inner cavity of the handle 200. The inner cavity of the handle 200 is connected to the outside through the first air inlet 210. This allows the airflow from the outside to enter the inner cavity of the handle 200 through the guiding effect of the guide component in the hot air device 300. Furthermore, the airflow is converted into hot air by the heating component in the hot air device 300. The hot air is then further transported to the air supply duct 101 by the guide component to form a hot airflow in the air supply duct 101. Finally, the hot air is discharged from the air outlet 110 at the end of the blower 100, which connects to the air supply duct 101, for the user to use for blow-drying.

[0048] In some embodiments, the hot air device 300 includes a heating element 310 and a fan 320.

[0049] The heating element 310 is disposed inside the handle 200; the fan 320 is disposed inside the handle 200. The fan 320 is used to draw air from the external environment into the handle 200 through the first air inlet 210 and guide it to the heating element 310, and deliver the hot air heated by the heating element 310 to the air supply duct 101.

[0050] In the above embodiment, by placing both the heating element 310 and the fan 320 inside the handle 200, the center of gravity of the hair dryer falls on the handle 200, resulting in a better user experience; it also facilitates the connection of electrical components such as the heating element 310 and the fan 320 to external circuits; and it also facilitates the disassembly and assembly of the handle 200 and the hair dryer 100.

[0051] Specifically, the heating element 310 serves as the heating component in the hot air device 300, and the fan 320 serves as the airflow guiding component in the hot air device 300. External airflow can enter the inner cavity of the handle 200 from the first air inlet 210 through the airflow guiding effect of the fan 320; and through the heating effect of the heating element 310, the airflow is converted into hot air, and the fan 320 further delivers the hot air into the air supply duct 101 to form a hot airflow in the air supply duct 101, and finally out of the air outlet 110 at the end of the blower 100 for use.

[0052] Furthermore, this embodiment does not limit the installation position of the heating element 310 and the fan 320 in the handle 200. In one embodiment, the heating element 310 is positioned close to the blower 100 and the fan 320 is positioned close to the first air inlet 210; in another embodiment, the fan 320 is positioned close to the blower 100 and the heating element 310 is positioned close to the first air inlet 210.

[0053] In some embodiments, the heating element 310 is located at one end near the blower 100, and the fan 320 is located between the first air inlet 210 and the heating element 310.

[0054] In the above embodiment, the heating element 310 is positioned close to the blower 100 and the fan 320 is positioned close to the first air inlet 210. That is, the fan 320 is positioned upstream of the heating element 310 along the airflow direction, which ensures that the airflow passing through the fan 320 is room temperature air and the fan 320 itself will not come into contact with the high temperature airflow, thereby avoiding overheating damage to the fan 320 by the high temperature airflow and ensuring the service life of the fan 320.

[0055] In some embodiments, a control board 400 is also provided inside the handle 200. The control board 400 is located between the fan 320 and the heating element 310 and is electrically connected to the fan 320 and the heating element 310 respectively.

[0056] In the above embodiment, the control board 400 is positioned between the fan 320 and the heating element 310 to facilitate electrical connection between the control board 400 and the fan 320 and the heating element 310 respectively. At the same time, by positioning the control board 400 upstream of the heating element 310, it is also ensured that the airflow passing through the control board 400 is room temperature air, and the control board 400 itself will not come into contact with the high-temperature airflow, thereby avoiding overheating damage to the control board 400 by the high-temperature airflow and ensuring the service life of the control board 400.

[0057] Specifically, the control board 400 is electrically connected to the fan 320 and the heating element 310 via several wiring harnesses, which are located inside the handle 200. Corresponding operation buttons are electrically connected to the control board 400, allowing the fan 320 and the heating element 310 to perform related operations via the control board 400.

[0058] In some embodiments, the handle 200 has a grip section and an air inlet section. The grip section is disposed near the air inlet duct 102, and the air inlet section is located at the end of the grip section away from the blower 100. The first air inlet 210 is configured to surround a plurality of air inlet holes disposed around the outer periphery of the air inlet section.

[0059] In the above embodiments, the grip section is designed to make it easy for users to hold, and by setting the first air inlet 210 on the air inlet section, the user's hand is prevented from blocking the first air inlet 210 when using it.

[0060] In some embodiments, the handle 200 further includes a heating element mounting section located at one end of the grip section near the blower 100 and connected to the side of the blower 100, with the heating element 310 disposed within the heating element mounting section.

[0061] In the above embodiments, the heating element 310 is positioned inside the grip section to prevent it from burning the user's hand during use.

[0062] In some embodiments, the angle formed between the central axis of the air inlet duct 102 and the central axis of the air outlet duct 101 is θ, where θ is less than 90°.

[0063] In the above embodiment, the central axis of the air inlet duct 102 is connected to the central axis of the air outlet duct 101 at an acute angle, which is conducive to the high-speed hot airflow generated by the hot air device 300 rushing into the air inlet duct 102 and forming an impact force towards the air outlet 110 at the end of the blower duct 100, thereby forming a spiral hot airflow, increasing the air velocity and air volume of the blower, and thus further improving the blowing efficiency.

[0064] Specifically, the included angle θ between the central axis of the air inlet duct 102 and the central axis of the air outlet duct 101 satisfies: 0° < θ < 90°; as a preferred embodiment, the included angle θ between the central axis of the air inlet duct 102 and the central axis of the air outlet duct 101 is 60°.

[0065] In some embodiments, the inner wall of the blower 100 includes a first inner wall section 103 located on the opposite side of the air inlet duct 102, and a second inner wall section 104 located between the air inlet duct 102 and the first inner wall section 103, wherein the central axis of the air inlet duct 102 is offset toward the second inner wall section 104.

[0066] In the above embodiment, the central axis of the air inlet duct 102 is offset towards the second inner wall section 104 of the blower duct 100, so that the air inlet duct 102 and the air supply duct 101 form an offset connection. The hot airflow in the air inlet duct 102 can enter and flow along the position close to the second inner wall section 104 of the blower duct 100, avoiding the hot airflow from directly colliding with the first inner wall section 103 on the opposite side of the blower duct 100 and causing energy loss, thereby reducing the flow loss of the airflow and improving the airflow speed and airflow of the blower.

[0067] Specifically, the hair dryer 100 is constructed in a cylindrical shape, and its cross-section is circular. The first inner wall section 103 of the hair dryer 100 is the portion of the side wall of the hair dryer 100 corresponding to a chord with a width equivalent to the air inlet end 1022 of the air inlet duct 102, located opposite the air outlet end 1021 of the air inlet duct 102; that is... Figure 9 The side wall of the blower 100 is the portion of the air blower 100 that is sandwiched between the two oblique lines of the central axis M of the air supply duct 101. The second inner wall section 104 of the blower 100 is the portion of the side wall of the blower 100 between the air outlet 1021 of the air inlet duct 102 and the first inner wall section 103.

[0068] In some embodiments, the central axis of the air inlet duct 102 is tangent to the second inner wall section 104.

[0069] In the above embodiment, the central axis of the air inlet duct 102 is tangentially arranged with the second inner wall section 104, so that the air inlet duct 102 and the air outlet duct 101 form a tangential connection. The hot airflow in the air inlet duct 102 can enter and flow tangentially along the second inner wall section 104 of the blower duct 100, avoiding the hot airflow from directly colliding with the first inner wall section 103 on the opposite side of the blower duct 100 and causing energy loss. This improves the smoothness of the air inlet duct 102 entering the air outlet duct 101, and further improves the air outlet speed and air volume of the blower.

[0070] Specifically, since the air inlet duct 102 has a certain width, when the central axis of the air inlet duct 102 is tangent to the second inner wall section 104, Figure 9 In the transverse cross-sectional view of the blower duct 100, the upper and lower air duct edges of the air inlet duct 102 do not need to be tangent to the second inner wall section 104. It is sufficient that the central axis of the air inlet duct 102 is tangent to the second inner wall section 104 to allow the hot airflow in the air inlet duct 102 to enter and flow tangentially along the second inner wall section 104 of the blower duct 100. As a preferred embodiment, tangenting the upper air duct edge of the air inlet duct 102 to the second inner wall section 104 further improves the smoothness of airflow from the air inlet duct 102 to the air outlet duct 101.

[0071] In some embodiments, the air outlet 1021 of the air inlet duct 102 is closer to the second inner wall section 104 relative to the central axis of the air supply duct 101.

[0072] In the above embodiment, the air outlet 1021 of the air inlet duct 102 is close to the second inner wall section 104 relative to the central axis of the blower duct 100, which is conducive to the hot air flow spiraling along the inner wall of the blower duct 100 and reducing the flow rate loss of the hot air flow.

[0073] Specifically, the air outlet 1021 of the air inlet duct 102 is positioned closer to the second inner wall section 104 relative to the central axis of the air supply duct 101, thereby making Figure 9 In the cross-sectional view of the blower 100, the lower air duct edge line in the air inlet duct 102 is closer to the second inner wall section 104 relative to the central axis M of the air inlet duct 102, ensuring that the hot air flow spirals along the inner wall of the blower 100.

[0074] In some embodiments, the second end of the blower 100 is provided with a second air inlet 120 that communicates with the air supply duct 101.

[0075] In the above embodiment, the pressure decreases near the connection position of the air inlet duct 102 and the air outlet duct 101 due to the increased airflow speed. The pressure difference is used to increase the airflow of the blower by using the second air inlet 120 as an auxiliary air inlet.

[0076] Specifically, by designing the cross-sectional area of ​​the outlet end 1021 of the air inlet duct 102 to be smaller than the cross-sectional area of ​​the inlet end 1022 of the air inlet duct 102, and utilizing the principle that the flow velocity increases when the fluid flows through a narrow channel, the hot airflow has a higher initial wind speed when it enters the supply air duct 101 after passing through the air inlet duct 102. When the high-speed hot airflow enters the supply air duct 101 along the air inlet duct 102, the pressure near the connection point between the air inlet duct 102 and the supply air duct 101 decreases due to the increased airflow velocity. This creates a pressure difference with the external airflow near the second air inlet 120 and the airflow in the first section L1 of the blower duct 100. Under the action of this pressure difference, the airflow from these two locations enters the supply air duct 101 of the blower duct 100 and is guided to the outlet 110 together with the airflow that enters from the first air inlet 210 and is discharged from the supply air duct 101, thereby increasing the airflow of the blower and further improving the blowing efficiency. Furthermore, due to the pressure difference, the airflow from the supply air duct 101 to the intake air duct 102 cannot escape from the upper second air inlet 120, but can only be discharged from the lower air outlet 110, ensuring effective auxiliary air intake.

[0077] In some embodiments, the connection point between the side of the blower 100 and the air inlet duct 102 is taken as the connection position. The blower 100 includes a first segment L1 located between the second air inlet 120 and the connection position, and a second segment L2 located between the air outlet 110 and the connection position. The length of the first segment L1 is less than the length of the second segment L2.

[0078] In the above embodiment, the length of the first segment L1 of the blower 100 is designed to be shorter than the length of the second segment L2, so that the hot airflow can flow in the longer second segment L2 of the blower 100, ensuring the guiding path of the hot airflow, thereby further improving the gentleness of the hot airflow discharged from the air outlet 110 at the end of the blower 100.

[0079] In this embodiment, the overall structure of the blower 100 can be designed as a cone-shaped structure without a sharp point. That is, the cross-sectional area of ​​the air supply duct 101 at the air outlet 110 position is smaller than the cross-sectional area of ​​the air supply duct 101 at the first air inlet 210 position. This is beneficial to increase the flow velocity of the hot air at the air outlet 110 by utilizing the principle that the flow velocity of fluid increases when it flows through a narrow channel.

[0080] In some embodiments, the blower 100 is configured as a double-layer structure, having an inner cylinder 150 and an outer cylinder 160, with a cavity formed between the inner cylinder 150 and the outer cylinder 160; an airflow inlet 130 passes through the outer cylinder 160 and the inner cylinder 150, and the air outlet 1021 of the air inlet duct 102 passes through the outer cylinder 160 and is connected to the airflow inlet 130 of the inner cylinder 150.

[0081] In the above embodiments, the double-layered hair dryer 100 can provide heat insulation and prevent scalding, reducing the surface temperature of the hair dryer 100. Simultaneously, the double-layered structure also makes the hair dryer 100 more robust and reliable. Furthermore, the air outlet 1021 of the air inlet duct 102 directly passes through the outer cylinder 160 and is inserted into the airflow inlet 130 of the inner cylinder 150, effectively preventing hot air from entering the cavity formed between the inner cylinder 150 and the outer cylinder 160.

[0082] As an alternative implementation, the hair dryer 100 can be constructed as a multi-layer structure with three, four, or five layers.

[0083] In some embodiments, at least one end of the hair dryer 100 is provided with an opening 170 communicating with a cavity, and the hair dryer 320 also includes an end cap 500, which is detachably connected to the opening 170.

[0084] In the above embodiment, at least one end of the blower 100 is provided with an opening 170 that communicates with the cavity, which facilitates the overall demolding of the double-layer blower 100; the end cap 500 is detachably connected to the opening 170, which serves a decorative purpose and also prevents dirt from entering the cavity formed between the inner cylinder 150 and the outer cylinder 160 through the opening 170.

[0085] Specifically, the opening 170 at the end of the blower 100 is located outside the air outlet 110 and is formed at the end of the cavity formed between the inner cylinder 150 and the outer cylinder 160. The inner wall of the outer cylinder 160 is provided with an internal thread 180, and the outer wall of the end cap 500 is provided with an external thread 510. The end cap 500 is detachably connected to the opening 170 through a threaded connection.

[0086] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by this application.

Claims

1. A hair dryer, characterized in that, include: A blower (100) has an inner cavity forming an air supply duct (101). The first end of the blower (100) is provided with an air outlet (110) communicating with the air supply duct (101). The side of the blower (100) is provided with an air inlet duct (102) communicating with the air supply duct (101). The cross-sectional area of ​​the air outlet end (1021) of the air inlet duct (102) is smaller than the cross-sectional area of ​​the air inlet end (1022) of the air inlet duct (102). The handle (200) has one end connected to the air inlet duct (102) and the other end provided with a first air inlet (210). The inner cavity of the handle (200) is connected to the first air inlet (210) and the air inlet duct (102) respectively. A hot air device (300) is disposed on the air guide path formed between the first air inlet (210) and the air outlet (110). The hot air device (300) is used to convert the airflow entering from the first air inlet (210) into hot air on the air guide path, and to transport the airflow through the air inlet duct (102) to the air outlet duct (101) to form a spiral hot airflow in the air outlet duct (101).

2. The hair dryer according to claim 1, characterized in that, From the air inlet end (1022) to the air outlet end (1021) of the air inlet duct (102), the cross-sectional area of ​​the air inlet duct (102) gradually decreases.

3. The hair dryer according to claim 2, characterized in that, The ratio of the cross-sectional area of ​​the air outlet (1021) of the air inlet duct (102) to the cross-sectional area of ​​the air inlet (1022) of the air inlet duct (102) is 1:

2.

4. The hair dryer according to claim 1, characterized in that, The side of the blower (100) is provided with an airflow inlet (130), and an interface structure (140) is fixedly provided on the part of the blower (100) located on the outer periphery of the airflow inlet (130). The interface structure (140) is fixedly connected to the handle (200). The air inlet duct (102) is fixedly installed inside the interface structure (140). The air inlet end (1022) of the air inlet duct (102) is connected to the inner cavity of the handle (200), and the air outlet end (1021) of the air inlet duct (102) is connected to the airflow inlet (130).

5. The hair dryer according to any one of claims 1-4, characterized in that, The hot air device (300) is located inside the handle (200) and is used to convert the airflow entering from the first air inlet (210) into hot air, and then transport the hot air through the air inlet duct (102) to the air outlet duct (101) to form a spiral hot airflow in the air outlet duct (101).

6. The hair dryer according to claim 5, characterized in that, The hot air device (300) includes: A heating element (310) is disposed within the handle (200); A fan (320) is disposed inside the handle (200). The fan (320) is used to draw air from the external environment into the handle (200) through the first air inlet (210) and guide it to the heating element (310), and deliver the hot air heated by the heating element (310) into the air supply duct (101).

7. The hair dryer according to claim 6, characterized in that, The heating element (310) is located at one end near the blower (100), and the fan (320) is located between the first air inlet (210) and the heating element (310).

8. The hair dryer according to claim 7, characterized in that, The handle (200) is also provided with a control board (400), which is located between the fan (320) and the heating element (310) and is electrically connected to the fan (320) and the heating element (310) respectively.

9. The hair dryer according to claim 5, characterized in that, The handle (200) has a grip section and an air inlet section. The grip section is located near the air inlet duct (102), and the air inlet section is located at the end of the grip section away from the blower (100). The first air inlet (210) is constructed to surround a plurality of air inlet holes around the outer periphery of the air inlet section.

10. The hair dryer according to claim 9, characterized in that, The handle (200) also has a heating element mounting section located at one end of the grip section near the blower (100) and connected to the side of the blower (100), wherein the heating element (310) is disposed within the heating element mounting section.

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