A nozzle for a care appliance and a care appliance

Abstract

The utility model discloses a nursing appliance's air cylinder and nursing appliance, nursing appliance's air cylinder, include: main cylinder, the air duct is formed in the main cylinder, sensor component, sensor component sets up one end at the main cylinder, air inlet structure, air inlet structure sets up another end at the main cylinder, air inlet structure forms annular air inlet channel, air inlet structure communicates with air inlet channel and air duct respectively, air inlet structure has the inner flow -guiding surface of being located in the inner peripheral side of air inlet channel and the outer flow -guiding surface of being located in the outer peripheral side of air inlet channel, the inner flow -guiding surface and outer flow -guiding surface are in the air inlet direction of air inlet channel and each other close. Therefore, by setting up this air cylinder, it can increase the air intake of unit time, accelerate drying speed, can also reduce the suction resistance, improve the smoothness of airflow flow into the air duct, reduce turbulence, thereby realize the effect of increasing air intake efficiency and reducing operating noise.

Description

Technical Field

[0001] This utility model relates to the field of nursing appliances, and in particular to a ventilation duct for a nursing appliance and a nursing appliance. Background Technology

[0002] Hair dryers are a common household appliance. Hair dryers are driven by a motor to rotate the fan blades. When the fan blades rotate, air is drawn into the hair dryer through the air inlet, passes through the heating element inside the hair dryer, and the resulting centrifugal airflow is blown out through the air outlet at the front of the hair dryer to achieve the purpose of drying and shaping.

[0003] In related technologies, traditional straight-barrel hair dryers typically suffer from problems such as low air intake volume, insufficient air output strength, and high airflow noise caused by excessive turbulence at the air inlet. Therefore, it is necessary to improve the existing technology to overcome the aforementioned defects. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a ventilation duct for a nursing device that can increase the air intake volume per unit time, accelerate the drying speed, reduce suction resistance, improve the smoothness of airflow into the duct, and reduce turbulence, thereby achieving the effects of increasing air intake efficiency and reducing operating noise.

[0005] This utility model further proposes a nursing device.

[0006] According to the first aspect of this utility model, a nursing device includes: a main cylinder with an air duct formed inside; a sensor assembly disposed at one end of the main cylinder; and an air inlet structure disposed at the other end of the main cylinder, the air inlet structure forming an annular air inlet channel, the air inlet structure communicating with the air inlet channel and the air duct respectively, the air inlet structure having an inner guide surface located on the inner periphery of the air inlet channel and an outer guide surface located on the outer periphery of the air inlet channel, the inner guide surface and the outer guide surface being close to each other in the air inlet direction of the air inlet channel.

[0007] Therefore, by setting up this air duct, the air intake per unit time can be increased, the drying speed can be accelerated, the suction resistance can be reduced, the smoothness of airflow into the air duct can be improved, and turbulence can be reduced, thereby achieving the effect of increasing air intake efficiency and reducing operating noise.

[0008] In some examples of this utility model, the cross-section of the inner guide surface perpendicular to the central axis of the air duct is circular and the cross-sectional area increases in the air intake direction of the air intake channel; the cross-section of the outer guide surface perpendicular to the central axis of the air duct is circular and the cross-sectional area decreases in the air intake direction of the air intake channel.

[0009] In some examples of this utility model, the longitudinal section of the inner guide surface is a straight line, and the central axis of the air duct is located within the longitudinal section of the inner guide surface; and / or the longitudinal section of the outer guide surface is a curve, and the central axis of the air duct is located within the longitudinal section of the outer guide surface.

[0010] In some examples of this utility model, the air inlet structure includes: an air inlet cover having an inner guide surface; and an air guide cover surrounding the air inlet cover, the air guide cover and the air inlet cover forming the air inlet channel, the air guide cover having an outer guide surface.

[0011] In some examples of this utility model, the air inlet cover includes: a cover plate; a first ring plate, one end of the first ring plate being connected to the edge of the cover plate, the first ring plate being provided with the inner guide surface, the first ring plate being provided with an air inlet hole, the air inlet hole being connected to the air inlet channel and the air duct respectively.

[0012] In some examples of this utility model, the air guide cover includes: a second ring plate, which is arranged around the first ring plate and forms the air inlet channel with the first ring plate, and the second ring plate has the outer guide surface; and a third ring plate, which is arranged around the second ring plate and connected to one end of the second ring plate, and the third ring plate is installed inside one end of the main cylinder.

[0013] In some examples of this utility model, the other end of the first ring plate is provided with a first flange, the other end of the second ring plate is provided with the second flange, and the second flange covers the first flange and is installed on the main cylinder together with the first flange.

[0014] In some examples of this utility model, the air duct of the nursing device further includes: a motor, the motor being disposed within the air duct; and an air supply component, the air supply component being disposed within the air duct and connected to the motor; wherein the maximum diameter of the air supply component is D1, the maximum diameter of the inner guide surface is D2, and D1 and D2 satisfy the relationship: D1≤D2.

[0015] In some examples of this utility model, the main cylinder includes: a shell; a motor bracket, the motor bracket being disposed inside the shell, the motor bracket forming a part of the air duct; wherein, the motor bracket includes a motor mounting part and a first guide part, the first guide part being connected to the end of the motor mounting part away from the air inlet structure, and the area of ​​the cross section of the first guide part perpendicular to the central axis of the air duct increasing in the direction of air flow within the air duct.

[0016] In some examples of this utility model, the main cylinder further includes: an inner shell, which is connected to the end of the first guide portion away from the motor mounting portion and forms another part of the air duct; a guide member, which is disposed inside the inner shell and forms a second guide portion opposite to the first guide portion, wherein the area of ​​the cross section of the second guide portion perpendicular to the central axis of the air duct increases in the direction of air flow in the air duct.

[0017] In some examples of this utility model, the angle between the guiding direction of the first guide part and the central axis of the main cylinder is α, and α satisfies the relationship: 33°≤α≤46°; and / or the angle between the guiding direction of the second guide part and the central axis of the main cylinder is β, and β satisfies the relationship: 55°≤β≤68°.

[0018] In some examples of this utility model, the air duct of the nursing device further includes: a heating bracket, which is disposed on the guide member and extends partially to the second guide portion; and a heating element, which is disposed on the heating bracket.

[0019] In some examples of this utility model, the inner shell is provided with a heat insulation component.

[0020] The nursing appliance according to the second aspect of the present invention includes: the air duct of the above-mentioned nursing appliance.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0023] Figure 1 This is a front view of a nursing device according to an embodiment of the present utility model;

[0024] Figure 2 This is a structural schematic diagram of a nursing device according to an embodiment of the present utility model;

[0025] Figure 3 This is an exploded view of a portion of the structure of the ventilation duct according to an embodiment of the present utility model;

[0026] Figure 4 This is a structural schematic diagram of the air duct according to an embodiment of the present utility model;

[0027] Figure 5 This is a cross-sectional view of the air duct according to an embodiment of the present utility model;

[0028] Figure 6 yes Figure 5 Enlarged view of region A in the middle;

[0029] Figure 7 This is a cross-sectional view of a portion of the structure of the air duct according to an embodiment of the present utility model;

[0030] Figure 8 This is a schematic diagram of the airflow inside the air duct according to an embodiment of the present invention.

[0031] Figure label:

[0032] 100. Hair dryer; 200. Nursing equipment;

[0033] 1. Main tube; 11. Air duct;

[0034] 2. Air inlet structure; 21. Air inlet channel; 22. Inner guide surface; 23. Outer guide surface; 24. Air inlet cover; 241. Cover plate; 242. First ring plate; 2421. Air inlet hole; 2422. First flange; 25. Air guide cover; 251. Second ring plate; 2511. Second flange; 252. Third ring plate;

[0035] 3. Motor; 4. Air supply component; 5. Housing;

[0036] 6. Motor bracket; 61. Motor mounting part; 62. First flow guide part;

[0037] 7. Inner shell; 71. Heat insulation component; 8. Flow guide component; 81. Second flow guide section;

[0038] 9. Heating bracket. Detailed Implementation

[0039] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0040] The following is for reference. Figures 1-8 The description of the air duct 100 of the nursing device 200 according to the present utility model embodiment can increase the air intake per unit time, accelerate the drying speed, reduce the suction resistance, improve the smoothness of airflow into the air duct 11, reduce turbulence, thereby achieving the effect of increasing air intake efficiency and reducing operating noise.

[0041] Combination Figures 1-8As shown, the air duct 100 of the nursing device 200 according to the first aspect embodiment of the present invention includes a main tube 1, a sensor assembly, and an air inlet structure 2. The main tube 1 serves as the main external structural outline of the nursing device 200, providing support and fixing. The sensor assembly may include a distance sensor for detecting the distance from the air outlet of the air duct 100 to the user's hair, a characteristic sensor for detecting the moisture content of the user's hair, and a Hall effect sensor for detecting accessories. The air inlet structure 2 is mainly used to guide outside air into the interior of the air duct 100.

[0042] Specifically, an air duct 11 is formed inside the main cylinder 1, the sensor assembly is located at one end of the main cylinder 1, and the air inlet structure 2 is located at the other end of the main cylinder 1. This improves the spatial distribution rationality and regularity of the air duct 100 and facilitates detection by the sensor assembly. The air inlet structure 2 forms an annular air inlet channel 21, and the air inlet structure 2 is connected to both the air inlet channel 21 and the air duct 11. The air inlet structure 2 has an inner guide surface 22 located on the inner periphery of the air inlet channel 21 and an outer guide surface 23 located on the outer periphery of the air inlet channel 21. The inner guide surface 22 and the outer guide surface 23 are close to each other in the air inlet direction of the air inlet channel 21. For example, Figure 8 As shown, one end of the main tube 1 is the rear end, and the other end of the main tube 1 is the front end. The front and rear ends can be changed according to the actual situation.

[0043] Specifically, the main tube 1 has a duct 11 that guides the airflow path, and the air intake structure 2 defines an annular air intake channel 21. Moreover, the air intake structure 2 is connected between the air intake channel 21 and the duct 11. This arrangement allows outside air to smoothly enter the air duct 100 along the flow path of the air intake channel 21-air intake structure 2-duct 11, which is beneficial to achieving the air outlet effect of the air duct 100.

[0044] Specifically, the inner guide surface 22 and the outer guide surface 23 of the air intake structure 2 are located on the inner and outer circumferences of the air intake channel 21, respectively. The inner guide surface 22 and the outer guide surface 23 can smooth the flow of air, thereby reducing the noise of the airflow during the process of flowing through the air intake channel 21 and the air intake structure 2, and thus improving the user experience.

[0045] Furthermore, in the direction of air intake from the air intake structure 2 into the main cylinder 1, the inner guide surface 22 and the outer guide surface 23 are close to each other. This allows the air intake structure 2 to capture more air into the main cylinder 1, thereby increasing the air intake volume per unit time. This enables the air duct 100 to output a larger airflow and accelerate the drying speed. Moreover, compared with a straight-cylinder air inlet, this reduces the resistance of air entering the main cylinder 1, thereby improving airflow smoothness. Furthermore, due to the increased air intake volume, more external air can be introduced into the air duct 11, which is beneficial for cooling the motor 3 and other heat-generating components inside the main cylinder 1, preventing overheating, extending service life, and thus improving the practicality and reliability of the air duct 100.

[0046] Therefore, by setting up the air duct 100, the air intake per unit time can be increased, the drying speed can be accelerated, the suction resistance can be reduced, the smoothness of airflow into the air duct 11 can be improved, and turbulence can be reduced, thereby achieving the effect of increasing air intake efficiency and reducing operating noise.

[0047] According to some optional embodiments of the present invention, combined with Figure 5 , Figure 6 and Figure 8 As shown, the cross-section of the inner guide surface 22 perpendicular to the central axis of the air duct 100 is circular, and the cross-sectional area of ​​the inner guide surface 22 increases in the air intake direction of the air intake channel 21.

[0048] The above arrangement can, on the one hand, increase the range of external air capture, thereby increasing the amount of air introduced into the duct 100 per unit time. On the other hand, as the air flows along the air intake direction, the flow pressure of the airflow through the air intake channel 21 can be gradually increased (since the inner guide surface 22 can limit the ventilation cross-sectional area of ​​the airflow), thereby increasing the flow speed of the airflow per unit time and thus improving the air intake efficiency.

[0049] According to some optional embodiments of the present invention, combined with Figure 5 , Figure 6 and Figure 8 As shown, the cross-section of the outer guide surface 23 perpendicular to the central axis of the air duct 100 is circular, and the cross-sectional area of ​​the outer guide surface 23 decreases in the air intake direction of the air intake channel 21.

[0050] The above arrangement can, on the one hand, increase the range of external air capture, thereby increasing the amount of air introduced into the duct 100 per unit time. On the other hand, as the air flows along the air intake direction, it can gradually increase the airflow speed per unit time (by limiting the ventilation cross-sectional area of ​​the airflow through the external guide surface 23), thereby improving the air intake efficiency.

[0051] Alternatively, combined Figure 5, Figure 6 and Figure 8 As shown, the longitudinal section of the inner guide surface 22 is an oblique straight line, and the central axis of the air duct 100 is located within the longitudinal section of the inner guide surface 22.

[0052] The longitudinal section of the inner guide surface 22 is a straight line, which can ensure the smooth flow of air on the inner guide surface 22, avoid the obstruction effect of the inner guide surface 22 on the airflow and the resulting turbulent noise, and reduce the resistance of the airflow along the inner guide surface 22, thereby reducing the airflow noise during the operation of the air duct 100 and improving the smoothness of the airflow during the intake process.

[0053] Furthermore, the central axis of the air duct 100 is located on the longitudinal section of the inner guide surface 22. That is to say, the inner guide surface 22 is directly aligned with the center of the air duct 100 (or the central axis of the inner guide surface 22 coincides with the central axis of the air duct 100). This ensures that air can enter the air duct 100 directly, reducing unnecessary airflow turns or obstructions, thereby improving the efficiency of airflow. Moreover, since the airflow path is more straight, the energy loss caused by changes in airflow direction can be reduced, making the motor 3 more efficient and potentially reducing power consumption. It also helps to reduce the formation of turbulence, because the airflow does not need to change direction significantly to enter the air duct 100 smoothly, thereby improving the stability of airflow and effectively reducing noise caused by turbulence. It also helps to distribute external air evenly within the circumferential range of the air duct 11, thereby effectively improving the uniformity of airflow distribution.

[0054] Alternatively, combine Figure 5 , Figure 6 and Figure 8 As shown, the longitudinal section of the outer guide surface 23 is curved, and the central axis of the air duct 100 is located at the longitudinal section of the outer guide surface 23.

[0055] The longitudinal section of the outer guide surface 23 is curved, which allows air to flow more smoothly along the outer guide surface 23, avoiding turbulence and resistance caused by sudden changes in direction, thereby improving air circulation efficiency and ensuring that more air can pass through the air intake channel 21 quickly and without obstruction, which in turn helps to provide stronger wind output to the air duct 100.

[0056] Furthermore, the central axis of the air duct 100 is located on the longitudinal section of the outer guide surface 23, meaning that the outer guide surface 23 is directly aligned with the center of the air duct 100 (or the central axis of the outer guide surface 23 coincides with the central axis of the air duct 100). This ensures that air can enter the air duct 100 directly, reducing unnecessary airflow bends or obstructions, thereby improving the efficiency of airflow. Moreover, because the airflow path is more straight, energy loss caused by changes in airflow direction can be reduced, resulting in higher working efficiency of the motor 3 and potentially reduced power consumption. Furthermore, since the airflow does not need to change direction significantly to smoothly enter the air duct 100, the formation of turbulence can be effectively reduced, thereby improving the stability of airflow and reducing noise caused by turbulence.

[0057] According to some optional embodiments of the present invention, combined with Figures 3-6 and Figure 8 As shown, the air inlet structure 2 includes an air inlet cover 24 and an air guide cover 25. The air inlet cover 24 has an inner guide surface 22, and the air guide cover 25 is arranged around the air inlet cover 24. The air guide cover 25 and the air inlet cover 24 form an air inlet channel 21, and the air guide cover 25 has an outer guide surface 23.

[0058] The air guide cover 25 surrounds the outer periphery of the air inlet cover 24, and the air guide cover 25 and the air inlet cover 24 define an air inlet channel 21. The air guide cover 25 and the air inlet cover 24 respectively form an inner guide surface 22 and an outer guide surface 23. This ensures that the external air can flow along the designated air flow path defined by the outer contour of the solid structure (i.e., the air guide cover 25 and the air inlet cover 24), thereby ensuring the stability of the airflow.

[0059] Specifically, in combination Figure 6 As shown, the air inlet cover 24 includes a cover plate 241 and a first ring plate 242. One end of the first ring plate 242 is connected to the edge of the cover plate 241. The first ring plate 242 is provided with an inner guide surface 22 and an air inlet hole 2421. The air inlet hole 2421 is connected to the air inlet channel 21 and the air duct 11 respectively.

[0060] It is understandable that, along the front-back direction of the air duct 100, the cover plate 241 is located at the end of the air inlet cover 24 away from the main tube 1. The first ring plate 242 is constructed in a closed-loop shape, and one end of the first ring plate 242 is connected to the edge of the cover plate 241. The cover plate 241 can increase the structural strength of the first ring plate 242 to a certain extent. The first ring plate 242 is provided with spaced air inlet holes 2421 along its circumference. The air inlet holes 2421 are connected between the air inlet channel 21 and the air duct 11. This allows the airflow to pass smoothly through the air inlet structure 2 and enter the interior of the main tube 1 after being guided by the air inlet channel 21, thereby realizing the blowing operation of the air duct 100.

[0061] Furthermore, combined Figure 6 As shown, the air guide cover 25 includes a second ring plate 251 and a third ring plate 252. The second ring plate 251 is arranged around the first ring plate 242, and the second ring plate 251 and the first ring plate 242 form an air inlet channel 21. The second ring plate 251 has an outer guide surface 23. The third ring plate 252 is arranged around the second ring plate 251, and the third ring plate 252 is connected to one end of the second ring plate 251. The third ring plate 252 is installed inside one end of the main cylinder 1.

[0062] In other words, the second ring plate 251 surrounds the outer periphery of the first ring plate 242, and the third ring plate 252 is arranged around the outer periphery of the second ring plate 251 and the two are connected as a whole. This can enhance the structural strength and bending and torsional stiffness of the second ring plate 251. The second ring plate 251 and the first ring plate 242 together define the air inlet channel 21. That is, the second ring plate 251 forms an outer guide surface 23, and the first ring plate 242 forms an inner guide surface 22. This allows the air to flow through the designated airflow path defined by the outer contour of the solid structure (that is, the second ring plate 251 and the third ring plate 252), thereby ensuring the stability of the airflow and thus ensuring the working stability of the duct 100.

[0063] Specifically, in combination Figure 6 As shown, the other end of the first ring plate 242 is provided with a first flange 2422, and the other end of the second ring plate 251 is provided with a second flange 2511. The second flange 2511 covers the first flange 2422, and the second flange 2511 and the first flange 2422 are installed on the main cylinder 1.

[0064] It is understood that the front end of the first ring plate 242 in the front-rear direction extends radially toward one side of the air inlet cover 24, and the front end of the second ring plate 251 in the front-rear direction extends radially toward one side of the air guide cover 25. The second flange 2511 of the second ring plate 251 covers the first flange 2422 of the first ring plate 242 in the front-rear direction. This can increase the connection contact area between the air guide cover 25 and the air inlet cover 24, thereby improving the connection strength between the two, and thus improving the connection reliability and stability of the two.

[0065] The second flange 2511 and the first flange 2422 are installed on the main tube 1, which facilitates the establishment of a reliable connection between the air inlet structure 2 and the main tube 1, thereby improving the overall structural consistency and stability of the air duct 100.

[0066] According to some optional embodiments of the present invention, combined with Figure 7 and Figure 8 As shown, the air duct 100 of the nursing device 200 also includes a motor 3 and an air supply component 4. The motor 3 is located inside the air duct 11, the air supply component 4 is located inside the air duct 11, and the air supply fan is connected to the motor 3.

[0067] The motor 3 primarily serves as the power source for the duct 100 (by converting electrical energy into mechanical energy). It drives the air delivery component 4 to rotate, and the rotational speed of the air delivery component 4 can be controlled according to the power of the motor 3, thereby adjusting the air volume and air intensity output by the duct 100. The air delivery component 4 (such as a fan, impeller, etc.) converts the mechanical energy provided by the motor 3 into the kinetic energy of the airflow (for example, when the motor 3 drives the air delivery component 4 to rotate, the air delivery component 4 pushes the surrounding air forward, forming a directional airflow. This process is based on Bernoulli's principle, that is, where the fluid (in this case, air) flows faster, the pressure is lower, and where it flows slower, the pressure is higher, so air is "drawn in" and forcefully discharged through the outlet).

[0068] Furthermore, combined Figure 8 As shown, the maximum diameter of the air supply component 4 is D1, and the maximum diameter of the inner guide surface 22 is D2. D1 and D2 satisfy the relationship: D1≤D2.

[0069] It is understandable that the maximum diameter of the air supply component 4 does not exceed the maximum diameter of the inner guide surface 22. Since the airflow needs to pass through the motor 3 in the flow path inside the air duct 100, the above arrangement can reduce the obstruction effect of the motor 3 on the airflow entering the air duct 100. This ensures the smooth flow of air in the air duct 100, improves the air outlet efficiency, and reduces the noise caused by turbulence. On the other hand, it also helps the gas to quickly remove the heat from the surface of the motor 3, prevents the motor 3 from overheating locally, and thus improves the heat dissipation effect of the motor 3.

[0070] According to some optional embodiments of the present invention, combined with Figure 2 , Figure 5 , Figure 7 and Figure 8 As shown, the main cylinder 1 includes a housing 5 and a motor bracket 6. The motor bracket 6 is disposed inside the housing 5 and forms part of the air duct 11. The motor bracket 6 includes a motor mounting part 61 and a first guide part 62. The first guide part 62 is connected to the end of the motor mounting part 61 away from the air inlet structure 2. The area of ​​the cross section of the first guide part 62 perpendicular to the central axis of the air duct 100 increases in the direction of air flow in the air duct 11.

[0071] In detail, the outer casing 5 provides structural protection for the internal structures of the air duct 100. The motor bracket 6 is installed and fixed inside the outer casing 5 and can be used to install the motor 3. The motor mounting part 61 mainly provides installation and fixing conditions for the motor 3. The first guide part 62 is connected to the end of the motor mounting part 61 away from the air inlet structure 2 in the front-back direction. Along the airflow direction, the cross-sectional area of ​​the first guide part 62 perpendicular to the central axis of the air duct 100 gradually increases. This helps to make the airflow diffuse evenly from the center to the surroundings, ensuring a larger air outlet coverage area, thereby improving the uniformity of airflow distribution.

[0072] Specifically, in combination Figure 5 , Figure 7 and Figure 8 As shown, the main cylinder 1 also includes an inner shell 7 and a flow guide 8. The inner shell 7 is connected to the end of the first flow guide 62 away from the motor mounting part 61, and the inner shell 7 forms another part of the air duct 11. The flow guide 8 is disposed inside the inner shell 7 and forms a second flow guide 81 opposite to the first flow guide 62. The area of ​​the cross section of the second flow guide 81 perpendicular to the central axis of the air duct 100 increases in the direction of air flow in the air duct 11.

[0073] Understandably, the inner shell 7 can further strengthen the outer shell 5. The inner shell 7 is connected to the end of the first guide section 62 away from the motor mounting section 61 in the front-back direction. The inner shell 7 and the motor bracket 6 together define a continuous air duct 11, which is the flow channel of airflow inside the air duct 100.

[0074] The guide member 8 is disposed within the inner shell 7, and the guide member 8 forms a second guide member 81 opposite to the first guide member 62. The second guide member 81 can guide the airflow within the air duct 100. Furthermore, along the airflow direction, the cross-sectional area of ​​the second guide member 81 perpendicular to the central axis of the air duct 100 gradually increases. This arrangement allows the second guide member 81 and the first guide member 62 to cooperate to form a structure with a gradually decreasing cross-sectional area of ​​the airflow channel. According to Bernoulli's principle, this can increase the airflow velocity, thereby increasing the output airflow intensity.

[0075] Alternatively, combined Figure 8 As shown, the angle between the guiding direction of the first guide section 62 and the central axis of the main cylinder 1 is α, and α satisfies the relationship: 33°≤α≤46°.

[0076] Specifically, when the angle between the guiding direction of the first guide section 62 and the central axis of the main cylinder 1 is less than 33°, the area of ​​air diffusion by the first guide section 62 within its limited size is small, which can easily lead to an excessively small outlet area and overly concentrated airflow. Conversely, when the angle between the guiding direction of the first guide section 62 and the central axis of the main cylinder 1 is greater than 46°, the area of ​​air diffusion by the first guide section 62 is large, which can easily lead to excessively reduced airflow and a risk of weak airflow. In summary, controlling the angle between the guiding direction of the first guide section 62 and the central axis of the main cylinder 1 within a reasonable range can ensure both uniform airflow distribution and sufficient airflow intensity. For example, the angle between the guiding direction of the first guide section 62 and the central axis of the main cylinder 1 can be 33°, 38°, 42°, and 46°, and is not limited to these.

[0077] Alternatively, combine Figure 8 As shown, the angle between the guiding direction of the second guide section 81 and the central axis of the main cylinder 1 is β, and β satisfies the relationship: 55°≤β≤68°.

[0078] Specifically, when the angle between the guiding direction of the second guide section 81 and the central axis of the main cylinder 1 is less than 55°, the area of ​​air diffusion by the second guide section 81 within its limited size is small, which can easily lead to weak airflow intensity at the outlet. Conversely, when the angle between the guiding direction of the second guide section 81 and the central axis of the main cylinder 1 is greater than 68°, the area of ​​air diffusion by the second guide section 81 is large, which can easily lead to excessive resistance to the airflow, increasing the risk of turbulence and noise. Therefore, controlling the angle between the guiding direction of the second guide section 81 and the central axis of the main cylinder 1 within a reasonable range can ensure airflow intensity while reducing airflow noise. For example, the angle between the guiding direction of the second guide section 81 and the central axis of the main cylinder 1 can be 55°, 60°, 63°, and 68°, etc., and is not limited to these.

[0079] Specifically, in combination Figure 7 As shown, the air duct 100 also includes a heating bracket 9 and a heating element. The heating bracket 9 is disposed on the flow guide 8 and extends partially to the second flow guide 81. The heating element is disposed on the heating bracket 9. For example, the heating element is a heating wire, which is wound around the heating bracket 9.

[0080] Understandably, the heating brackets 9 are spaced circumferentially around the outer periphery of the air guide 8. Heating elements are mounted on the heating brackets 9, converting electrical energy into heat energy to heat the air drawn into the air duct 100 before it is expelled as hot air. In summary, the heating elements can rapidly increase the temperature of the air passing through the air duct 100, providing a warm airflow for drying hair or other purposes. Compared to air drying, using hot air significantly accelerates moisture evaporation and improves efficiency.

[0081] Furthermore, combined Figure 7 As shown, the inner shell 7 is provided with a heat insulation element 71. This heat insulation pad is typically made of high-temperature resistant materials, such as ceramic fiber, glass fiber, silicone, or other composite materials. The heat insulation element 71 can be placed between the heating element and the inner shell 7, thereby forming a physical barrier (primarily for heat insulation), reducing the possibility of heat conduction from the heating element to the surrounding environment, preventing overheating damage to related structures, and allowing the outer shell 5 of the air duct 100 (even when the air duct 100 is operating at high power for extended periods) to remain at a relatively low and safe level, reducing the risk of burns to users upon contact. It also helps to concentrate heat on the areas requiring heating, i.e., the airflow accelerated by the fan, rather than dissipating it to unnecessary areas, thus enabling more efficient use of electrical energy for heating and improving the heating efficiency of the airflow.

[0082] According to a second aspect of the present invention, the nursing device 200 includes the air duct 100 of the nursing device 200 described above. Thus, the nursing device 200 with the air duct 100 can reduce the operating noise level caused by turbulence while ensuring air intake efficiency, thereby improving the user experience and enhancing the market competitiveness of the nursing device 200.

[0083] In the description of this utility model, 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", "axial", "radial", "circumferential", 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 are not intended to 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.

[0084] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0085] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0086] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A ventilation duct for a nursing device, characterized in that, include: Main cylinder, with an air duct formed inside the main cylinder; A sensor assembly, wherein the sensor assembly is disposed at one end of the main cylinder; An air intake structure is provided at the other end of the main cylinder. The air intake structure forms an annular air intake channel. The air intake structure is connected to both the air intake channel and the air duct. The air intake structure has an inner guide surface located on the inner periphery of the air intake channel and an outer guide surface located on the outer periphery of the air intake channel. The inner guide surface and the outer guide surface are close to each other in the air intake direction of the air intake channel.

2. The air duct of the nursing appliance according to claim 1, characterized in that, The cross-section of the inner guide surface perpendicular to the central axis of the air duct is circular, and the cross-sectional area increases in the air intake direction of the air intake channel. The cross-section of the outer guide surface perpendicular to the central axis of the air duct is circular, and the cross-sectional area decreases in the air intake direction of the air intake channel.

3. The air duct of the nursing appliance according to claim 2, characterized in that, The longitudinal section of the inner guide surface is an oblique straight line, and the central axis of the air duct is located within the longitudinal section of the inner guide surface; and / or The longitudinal section of the outer guide surface is curved, and the central axis of the air duct is located at the longitudinal section of the outer guide surface.

4. The air duct of the nursing appliance according to claim 1, characterized in that, The air intake structure includes: An air inlet cover, wherein the air inlet cover has the inner guide surface; An air guide cover is provided around the air inlet cover, and the air guide cover and the air inlet cover form the air inlet channel. The air guide cover has the outer airflow guiding surface.

5. The air duct of the nursing appliance according to claim 4, characterized in that, The air inlet cover includes: Cover plate; A first ring plate, one end of which is connected to the edge of the cover plate, is provided with an inner guide surface and an air inlet hole, which is connected to the air inlet channel and the air duct respectively.

6. The air duct of the nursing appliance according to claim 5, characterized in that, The air guide cover includes: The second ring plate is arranged around the first ring plate and forms the air inlet channel with the first ring plate. The second ring plate has the outer guide surface. The third ring plate is arranged around the second ring plate and connected to one end of the second ring plate. The third ring plate is installed inside one end of the main cylinder.

7. The air duct of the nursing appliance according to claim 6, characterized in that, The other end of the first ring plate is provided with a first flange, and the other end of the second ring plate is provided with a second flange. The second flange covers the first flange and is installed on the main cylinder together with the first flange.

8. The air duct of the nursing appliance according to claim 1, characterized in that, Also includes: An electric motor is disposed within the air duct; An air supply component, wherein the air supply component is disposed within the air duct and connected to the motor; The maximum diameter of the air supply component is D1, and the maximum diameter of the inner guide surface is D2. D1 and D2 satisfy the relationship: D1≤D2.

9. The air duct of the nursing appliance according to claim 1, characterized in that, The main tube includes: shell; A motor bracket is disposed inside the housing and forms part of the air duct; The motor bracket includes a motor mounting part and a first flow guide part. The first flow guide part is connected to the end of the motor mounting part away from the air inlet structure. The area of ​​the cross-section of the first flow guide part perpendicular to the central axis of the air duct increases in the direction of air flow in the air duct.

10. The air duct of the nursing appliance according to claim 9, characterized in that, The main tube also includes: An inner shell, which is connected to the end of the first air guide portion away from the motor mounting portion and forms the other part of the air duct; A flow guide is disposed within the inner shell. The flow guide has a second flow guide that is opposite to the first flow guide. The area of ​​the cross section of the second flow guide perpendicular to the central axis of the air duct increases in the direction of airflow within the air duct.

11. The air duct of the nursing appliance according to claim 10, characterized in that, The angle between the flow direction of the first guide section and the central axis of the main cylinder is α, where α satisfies the following relationship: 33°≤α≤46°; and / or The angle between the flow direction of the second flow guide and the central axis of the main cylinder is β, and β satisfies the relationship: 55°≤β≤68°.

12. The air duct of the nursing appliance according to claim 10, characterized in that, Also includes: A heating bracket, which is disposed on the flow guide and extends partially to the second flow guide portion; A heating element is disposed on the heating bracket.

13. The air duct of the nursing appliance according to claim 12, characterized in that, The inner shell is equipped with a heat insulation component.

14. A nursing appliance, characterized in that, include: The air duct of the nursing appliance according to any one of claims 1-13.

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