Duct structure and hair dryer

Abstract

The application relates to a wind tube structure and a hair dryer, which comprises a wind tube shell; a first air duct is formed in the inside of the wind tube shell; a containing cavity is formed in the shell wall of the wind tube shell, at least part of the space of the containing cavity forms a second air duct; a guide air port is arranged in the shell wall of the wind tube shell, the guide air port is communicated with the second air duct; the first air duct and the guide air port are connected with a wind source; the first air duct is used for conveying a first part of airflow generated by the wind source; and the guide air port is used for guiding a second part of airflow generated by the wind source to enter the second air duct. According to the double-air-duct design of the first air duct and the second air duct, the airflow is branched, the airflow flow rate blown out by the first air duct is reduced, the impact force generated on the hair due to the too concentrated airflow is avoided, the damage problems such as the damage of hair scale and the splitting of hair caused by long-time use are prevented, the airflow distribution is optimized, the covering contact area of the airflow and the hair is increased, and the drying efficiency is remarkably improved.

Description

Technical Field

[0001] This application relates to the technical field of hair dryers, and in particular to a hair dryer structure and a hair dryer. Background Technology

[0002] A hair dryer is a household appliance that uses an electric motor to drive the fan blades to generate airflow, which is then heated by an electric heating element to blow out hot air. It is primarily used for drying and styling hair. Traditional hair dryers produce a relatively concentrated airflow, resulting in excessively high localized airflow speeds on the hair during drying. This can cause strong impacts on the hair strands, potentially leading to hair damage over time, such as cuticle damage and split ends. Furthermore, it limits the contact area between the airflow and the hair, hindering the effective removal of moisture from the hair's surface and reducing drying efficiency. Utility Model Content

[0003] Therefore, it is necessary to provide a hair dryer structure and a hair dryer that address the problems of hair damage and low drying efficiency caused by traditional techniques.

[0004] A first aspect of this application provides a ventilation duct structure, including a ventilation duct shell;

[0005] The interior of the air duct shell has a first air duct, and the first air duct has a first air outlet.

[0006] The shell wall of the air duct housing has a receiving cavity, and at least a portion of the space in the receiving cavity forms a second air duct. The second air duct has a second air outlet, and the first air outlet and the second air outlet are located at the same end of the air duct housing.

[0007] The shell wall of the air duct is provided with an air guide port, which is connected to the second air duct;

[0008] The first air duct and the air guide are both used to connect to the air source. The first air duct is used to transport the first part of the airflow generated by the air source, and the air guide is used to guide the second part of the airflow generated by the air source into the second air duct. The second air duct is used to transport the second part of the airflow.

[0009] The air duct structure of this design is applied in a hair dryer, specifically for assembly and connection with the handle. This allows the first air duct formed inside the air duct housing and the air guide opening on the housing wall to communicate with the air source installed inside the handle. In use, the hair to be dried is placed in the receiving cavity formed on the housing wall, and then the air source is turned on. The air source simultaneously delivers air to the first air duct and the air guide opening. On one hand, the first portion of the airflow flowing into the first air duct is blown out from the first air outlet, providing the main drying airflow for the hair; on the other hand, the second portion of the airflow, passing through the air guide opening, flows into the second air duct. This second portion of the airflow has… This design increases the contact area with the hair, allowing for more and faster removal of moisture from the hair surface and its expulsion from the second air outlet. Therefore, compared to traditional technologies, this solution utilizes a dual-airflow design with a first and second airflow channel to divert airflow. This not only reduces the airflow volume from the first airflow channel, preventing excessive impact on the hair due to overly concentrated airflow and avoiding damage such as cuticle damage and split ends after prolonged use, but also optimizes airflow distribution, increasing the contact area between the airflow and the hair, thus significantly improving drying efficiency.

[0010] The technical solution of this application will be further described below:

[0011] In one embodiment, an air duct is formed inside the duct housing, which is used to connect the air guide port to the air source.

[0012] In one embodiment, the receiving cavity is a hollow cavity extending through the axially opposite ends of the air duct housing, one axial end of the air duct housing is the air outlet end, the first air outlet is opened on the annular end face of the air outlet end, and the first air outlet surrounds the outer periphery of the second air outlet.

[0013] In one embodiment, the duct housing includes an inner duct shell and an outer duct shell, the inner duct shell being sleeved and connected to the inside of the outer duct shell, and the inner duct shell and the outer duct shell cooperating to form the first air duct and the drainage air duct.

[0014] In one embodiment, both the inner shell and the outer shell of the air duct are semi-closed annular structures, so that an opening is formed on the radial side of the air duct shell. The opening communicates with the receiving cavity and passes through the axial opposite ends of the air duct shell. The first air duct surrounds the outer periphery of the second air duct.

[0015] In one embodiment, the air duct structure further includes a first heating element disposed within the first air duct.

[0016] In one embodiment, the duct structure further includes a second heating element disposed on the side wall of the second air duct. The second heating element and the air guide are aligned along the axial direction of the duct housing, and the second heating element is arranged closer to the air outlet than the air guide.

[0017] In one embodiment, the duct structure further includes a control device connected to the first heating element and / or the second heating element;

[0018] Alternatively, the first heating element and the second heating element are connected in a heat transfer connection.

[0019] In one embodiment, the inner shell of the air duct is provided with a first mating part and a second mating part, the first mating part and the second mating part being spaced apart along the axial direction of the air duct shell to form the air guide.

[0020] In one embodiment, the first mating part is provided with an extension part, the extension part and the second mating part are arranged radially stacked and cooperate to form an air guide gap, the air guide gap is connected to the air guide port, and the extension part is used to construct the side of the air guide gap as an arc surface structure;

[0021] The width of the air guide gap is 0.5mm to 0.7mm.

[0022] In one embodiment, the extension is provided with a flow guiding structure, which is located within the air guide gap and is used to guide the airflow in the air duct to converge and flow toward the second heating element.

[0023] In one embodiment, the airflow guiding structure includes a plurality of airflow guiding vanes, which are spaced apart on the extension along the length of the airflow guiding gap.

[0024] In one embodiment, the plurality of guide vanes include a first guide vane, a plurality of second guide vanes, and a plurality of third guide vanes. The first guide vane is arranged parallel to the axis of the duct housing. The plurality of second guide vanes are arranged side by side at intervals on one side of the first guide vane and are all inclined toward the first guide vane so that the first guide vane is arranged at an angle to the axis of the duct housing. The plurality of third guide vanes are arranged side by side at intervals on the other side of the first guide vane and are all inclined toward the first guide vane so that the third guide vane is arranged at an angle to the axis of the duct housing.

[0025] In one embodiment, the inner wall of the duct shell for constructing the second air duct is recessed to form an installation groove, the second heating element is installed in the installation groove, the second heating element has a first surface facing away from the duct shell, the first mating part has a second surface facing away from the duct shell, and both the first surface and the second surface adopt a streamlined arc surface structure and are smoothly connected.

[0026] In one embodiment, the duct housing further includes a mounting body. The duct housing has an air inlet, the mounting body is installed at the air inlet, and a diversion duct is formed inside the mounting body. The diversion duct is connected to the first duct and the guide duct through the air inlet. The inner shell of the duct is provided with a diversion structure facing the air inlet.

[0027] In one embodiment, the diversion structure is configured to be movable, such that the diversion structure can adjust the gas flow rate from the diversion duct into the first duct and the diversion duct.

[0028] A second aspect of this application also proposes a hair dryer, which includes:

[0029] A handle, wherein an air source is installed inside the handle; and

[0030] As described above, the air duct structure is connected to the handle, and the air source is used to supply air to the first air duct and the diversion air duct. Attached Figure Description

[0031] The accompanying drawings, which constitute a mating part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application.

[0032] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of a hair dryer according to one embodiment.

[0034] Figure 2 This is a front view of the structure of a hair dryer.

[0035] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure at point AA.

[0036] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure at point BB.

[0037] Figure 5 This is a schematic diagram of the explosion structure of a hair dryer.

[0038] Figure 6 for Figure 5 A magnified schematic diagram of the structure at point C.

[0039] Explanation of reference numerals in the attached figures:

[0040] 100. Hair dryer; 10. Hair dryer structure; 11. Hair dryer housing; 11a. Hair dryer inner shell; 111a. First mating part; 1111a. Second surface; 1111b. Extension part; 111b. Second mating part; 111c. Air guide port; 111d. Air guide gap; 111e. Mounting groove; 111f. Diverting structure; 11b. Hair dryer outer shell; 112b. Air inlet; 11c. Opening; 111. Receiving cavity; 112. 1. Air duct; 112a. First air outlet; 113. Diverting air duct; 114. Second air duct; 114a. Second air outlet; 115. Air outlet end; 116. Mounting body; 1161. Diverting air duct; 12. First heating element; 13. Second heating element; 131. First surface; 14. Air guiding structure; 141. Air guiding vane; 141a. First air guiding vane; 141b. Second air guiding vane; 141c. Third air guiding vane; 20. Handle. Detailed Implementation

[0041] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0042] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 application.

[0043] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0045] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0046] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0047] See Figure 1 and Figure 2 This application illustrates a hair dryer 100 as an embodiment of the present application. Specifically, it is a handheld hair dryer primarily used for drying human hair. Of course, this hair dryer 100 can also be used for drying animal hair, electronic devices, and other objects.

[0048] Please continue reading. Figure 3 For example, the hair dryer 100 mainly includes a handle 20 and a blower structure 10, which is connected to the handle 20. The handle 20 is equipped with an air source (not shown in the figure); the air source is used to deliver air to the first air duct 112 and the diversion air duct 113.

[0049] As is easily understood, the handle 20 provides a part for the user to hold. For example, the handle 20 can be any shape, such as a cylinder or a cuboid, depending on the actual needs.

[0050] It should be noted that the handle 20 is a grip part for the user to hold the hair dryer 100. The handle 20 can be understood as being integrally formed with the hair dryer structure 10, or it can be detachable and assembled. In addition, in other optional embodiments, the hair dryer 100 may not have a handle 20, and the part of the hair dryer structure 10 that can be provided for the user to hold may be used as the grip part.

[0051] Furthermore, to improve grip comfort and prevent the hair dryer 100 from slipping out of the hand, the outer surface of the handle 20 can be provided with anti-slip texture or covered with an anti-slip layer. When an anti-slip layer is used, the anti-slip layer can specifically be an anti-slip rubber sleeve.

[0052] The handle 20 has a hollow cavity for containing the air source. In addition, air inlets are provided on the side wall and / or bottom wall of the handle 20 so as to draw air from the external environment into the hollow cavity in conjunction with the suction force of the air source, and then drive the air to flow to the first air duct 112 and the diversion air duct 113 through the air source, thereby realizing the dual air duct air outlet of the first air duct 112 and the second air duct 114.

[0053] Figure 3 The small arrows in the diagram represent the airflow paths in the first air duct 112, the diversion air duct 113, and the second air duct 114.

[0054] In one embodiment, the air source includes at least a motor and fan blades. The motor drives the fan blades to rotate at high speed, so as to blow air at a high flow rate to the first air duct 112 and the second air duct 114.

[0055] In other alternative embodiments, the air source can also be a bladeless fan or other equipment capable of driving airflow, which can be flexibly selected according to actual needs.

[0056] Furthermore, the air source also includes cables and / or rechargeable batteries. A cable can be used to electrically connect to the motor, and the motor can be powered by plugging the cable into a power outlet; alternatively, a rechargeable battery can be used to electrically connect to the motor, and the motor can be powered by the rechargeable battery; or a cable can be used to electrically connect to the motor via a rechargeable battery, facilitating charging of the rechargeable battery via the cable, which in turn powers the motor.

[0057] In addition, to facilitate the placement of the hair dryer 100 and avoid occupying storage space in the cabinet, the hair dryer 100 is equipped with a mounting base that can be installed on objects such as walls. At the same time, the handle 20 of the hair dryer 100 is also equipped with a mounting component that can be connected or separated from the mounting base, so as to enable the hair dryer 100 to be hung and easily accessed.

[0058] In this application, the hair dryer housing 11 is the main structure of the hair dryer 100 and is used to perform hair drying operations.

[0059] Please continue reading. Figures 1 to 6 In an optional embodiment, the duct structure 10 includes a duct shell 11, a first air duct 112 is formed inside the duct shell 11, the first air duct 112 has a first air outlet 112a, the shell wall of the duct shell 11 forms a receiving cavity 111, at least a portion of the space in the receiving cavity 111 forms a second air duct 114, the second air duct 114 has a second air outlet 114a, the first air outlet 112a and the second air outlet 114a are located at the same end of the duct shell 11; the shell wall of the duct shell 11 has an air guide 111c, the air guide 111c is connected to the second air duct 114.

[0060] The air vent 111c is connected to the second air duct 114. This can be understood as the two being directly connected, or indirectly connected through an intermediate air duct. The choice can be made according to actual needs.

[0061] The first air duct 112 and the air guide 111c are both used to connect to the air source so that the air source can supply air to the first air duct 112 and the air guide 111c.

[0062] Specifically, the first air duct 112 is used to transport the first part of the airflow generated by the air source, and the air guide 111c is used to guide the second part of the airflow generated by the air source into the second air duct 114 so that the second air duct 114 transports the second part of the airflow.

[0063] It should be noted that the sum of the first part of the airflow and the second part of the airflow can be understood as the total output air volume of the air source, or it can be understood as only a part of the output air volume of the air source. No specific limitation is made here.

[0064] In summary, implementing the technical solution of this embodiment will achieve the following beneficial effects: The air duct structure 10 of this solution is applied in the hair dryer 100, specifically for assembly and connection with the handle 20, so that the first air duct 112 formed inside the air duct housing 11 and the air guide 111c opened on the inner wall of the air duct housing 11 are both connected to the air source installed inside the handle 20.

[0065] In use, place the hair to be dried into the receiving cavity 111 of the hair dryer housing 11, and then turn on the air source. The air source simultaneously sends air to the first air duct 112 and the air guide 111c. On the one hand, the first part of the airflow flowing into the first air duct 112 is blown out from the first air outlet 112a, thereby providing the main drying air volume for the hair. On the other hand, the second part of the airflow passing through the air guide 111c flows into the second air duct 114. This part of the airflow effectively increases the coverage and contact area with the hair, thereby removing more and faster moisture from the surface of the hair and expelling it from the second air outlet 114a.

[0066] Therefore, compared with traditional technologies, this solution utilizes the dual-channel design of the first air duct 112 and the second air duct 114 to achieve airflow diversion. This not only reduces the airflow volume blown out by the first air duct 112, avoiding excessive impact on the hair due to overly concentrated airflow, thus preventing damage such as cuticle damage and split ends after prolonged use, but also optimizes the airflow distribution, increasing the coverage and contact area between the airflow and the hair, thereby significantly improving hair drying efficiency.

[0067] Furthermore, considering the complex internal structure of the duct shell 11, in order to ensure that a portion of the airflow generated by the air source can effectively flow to the air guide 111c, a diversion duct 113 is also formed inside the duct shell 11. The diversion duct 113 is used to connect the air guide 111c to the air source. That is, the diversion duct 113 can effectively guide a portion of the airflow to flow to the air guide 111c, so that this portion of the airflow can enter the second air duct 114 in a timely and effective manner.

[0068] Please continue reading. Figures 1 to 3 In one embodiment, the duct housing 11 is a cylindrical structure. The receiving cavity 111 is a hollow cavity that runs through the two axially opposite ends of the duct housing 11. One axial end of the duct housing 11 is the air outlet end 115. The first air outlet 112a is opened on the annular end face of the air outlet end 115 and surrounds the outer periphery of the second air outlet 114a.

[0069] In use, the hair to be dried can be inserted into the receiving cavity 111 from the other axial end of the hair dryer housing 11 in the direction towards the air outlet 115. Then, the air source is turned on, and the airflow flowing through the first air duct 112 and out of the first air outlet 112a can dry the hair extending outside the air outlet 115. The airflow flowing into the second air duct 114 from the air guide 111c can also dry the hair inside the receiving cavity 111. This part of the airflow carries the moisture on the hair and is discharged from the second air outlet 114a to the outside of the hair dryer housing 11. The simultaneous presence of airflow in the first air duct 112 and the second air duct 114 to dry the hair can greatly improve the drying efficiency while avoiding damage to the hair.

[0070] Understandably, the air guide 111c can be regarded as the air outlet of the air diversion duct 113, and also as the air inlet 112b of the second air duct 114. The second air duct 114 extends from the air guide 111c to the second air outlet 114a located at the air outlet end 115.

[0071] In one embodiment, the first air duct 112 guides a first portion of the airflow generated by the air source to the target area, and the second air duct 114 also guides a second portion of the airflow generated by the air source to the target area.

[0072] For example, the target area can refer to the area located outside the duct housing 11 and opposite to the air outlet 115.

[0073] Furthermore, in one embodiment, the duct housing 11 includes an inner duct housing 11a and an outer duct housing 11b, with the inner duct housing 11a sleeved and connected inside the outer duct housing 11b. The inner duct housing 11a and the outer duct housing 11b can be an integral structure or can be detachably assembled.

[0074] After the inner shell 11a and the outer shell 11b of the air duct are fitted together, a cavity is formed between them. This cavity includes at least a first air duct 112 and a diversion air duct 113 formed by the cooperation between the inner shell 11a and the outer shell 11b. This simplifies the forming method of the first air duct 112 and the diversion air duct 113.

[0075] Both the inner shell 11a and the outer shell 11b of the duct are semi-closed annular structures, so that an opening 11c is formed on the radial side of the duct shell 11. For example, both the inner shell 11a and the outer shell 11b are C-shaped structures, and the duct shell 11 formed by the inner and outer shells of the two is also C-shaped. Therefore, an opening 11c is naturally formed on the radial side of the duct shell 11. The opening 11c does not require additional processing and forming, which helps to reduce costs and manufacturing difficulty. Furthermore, the opening 11c communicates with the receiving cavity 111 and extends through the axial opposite ends of the duct shell 11. The first air duct 112 surrounds the outer periphery of the second air duct 114.

[0076] The elongated opening 11c allows users to easily and effectively push the hair to be dried directly into the receiving cavity 111 from the side of the hair dryer housing 11, improving ease of use and reducing the difficulty of use.

[0077] The first air duct 112 and the first air outlet 112a are both C-shaped structures that fit each other and are located on the outer periphery of the blower housing 11, so that an air path that is close to a complete ring can be blown out from the first air outlet 112a, so that more airflow can cover and contact more hair, and can remove more moisture from the hair per unit time, thereby improving the efficiency of hair drying.

[0078] It is easy to understand that, under non-heating conditions, the airflow from the first air duct 112 and the second air duct 114 is cold air, which actually has a limited effect and efficiency in drying wet hair.

[0079] Please continue reading. Figures 1 to 3 ,as well as Figure 5 In view of this, based on any of the above embodiments, the air duct structure 10 further includes a first heating element 12, which is disposed in the first air duct 112.

[0080] The first heating element 12 extends along the C-shaped first air duct 112, thus the first heating element 12 also has a C-shaped structure. In this way, the first heating element 12 has a larger heating area, and the contact area between the first heating element 12 and the air flowing through the first air duct 112 is larger, which can more effectively heat the airflow in the first air duct 112, thereby blowing out more hot air from the first air outlet 112a.

[0081] When the hair dryer 100 is working, it supplies power to the first heating element 12, which then generates high-temperature heat. As the airflow passes through the first air duct 112, it simultaneously passes through the first heating element 12. The first heating element 12 heats the airflow to raise its temperature and turn it into hot air. The hot airflow is blown out from the first air outlet 112a and acts on the wet hair, achieving a heat drying effect on the hair, thereby accelerating the removal of moisture from the hair and improving the drying efficiency.

[0082] For example, the first heating element 12 can be any one or a combination of at least two of the following: heating wire, heating tube, heating element, PTC heater.

[0083] Please continue reading. Figure 1 ,as well as Figures 3 to 5 Furthermore, the duct structure 10 also includes a second heating element 13, which is disposed on the side wall of the second air duct 114. The second heating element 13 and the air guide 111c are aligned along the axial direction of the duct shell 11, and the second heating element 13 is arranged closer to the air outlet 115 than the air guide 111c.

[0084] During use, the second heating element 13 generates heat, which can heat the airflow in the second air duct 114 to improve the drying effect on the hair. On the other hand, the hair comes into direct contact with the second heating element 13, which has a perming effect and helps to straighten curly hair.

[0085] In addition, the temperature of the hot air blown out from the first air duct 112 is usually higher than that of the hot air blown out from the second air duct 114. When the hot air with a certain temperature difference in the first air duct 112 and the second air duct 114 acts on the hair at the same time, it can help the hot air to be distributed more evenly, thereby effectively avoiding the occurrence of local overheating and preventing the hair from being burned by local overheating. This makes the temperature felt by the scalp more comfortable during use, thereby improving the user experience.

[0086] For example, the second heating element 13 can be, but is not limited to, a heating element, a heating plate, etc.

[0087] Furthermore, the duct structure 10 also includes a controller (not shown in the figure), which is connected to the first heating element 12 and / or the second heating element 13 to supply power to the first heating element 12 and / or the second heating element 13. Alternatively, the first heating element 12 and the second heating element 13 are connected in a heat transfer connection.

[0088] The inner shell 11a and the outer shell 11b of the blower duct also cooperate to form a receiving cavity, which is connected to the first air duct 112. The controller is located in the receiving cavity. This allows the controller to be integrated and installed inside the blower duct housing 11. On the one hand, the controller can be hidden, making the appearance of the blower 100 more concise; on the other hand, the blower duct housing 11 also provides protection for the controller.

[0089] In one embodiment, the controller may be a control circuit board, which is connected to both the first heating element 12 and the second heating element 13 via wires. Alternatively, the control circuit board may be connected only to the first heating element 12 via wires, so that the first heating element 12 is energized to generate heat, and the second heating element 13, through contact with the first heating element 12, allows some of the heat generated by the first heating element 12 to be conducted to the second heating element 13, thus generating heat. In this case, the second heating element 13 may be in direct contact with the first heating element 12 to achieve heat conduction, or it may be indirect contact with the first heating element 12 through a heat transfer medium to achieve heat conduction.

[0090] The heat transfer medium mentioned can be any of the following: thermally conductive adhesive, thermally conductive support, etc. The specific choice can be made flexibly according to actual needs.

[0091] Please continue reading. Figure 4 In an optional embodiment, the inner shell 11a of the air duct is provided with a first mating part 111a and a second mating part 111b, which are spaced apart along the axial direction of the air duct shell 11 to form an air guide 111c. Therefore, the air guide 111c has a simple forming method and structure and is easy to manufacture.

[0092] As is easy to understand, the first mating part 111a and the second mating part 111b are both parts of the shell wall of the inner shell 11a of the air duct. The shape, size and other parameters of the two can be adapted to the shape, size and other parameters of the air guide 111c. No specific limitation is made here.

[0093] In this application, since the inner shell 11a of the air duct is C-shaped, the air guide 111c formed on the inner shell 11a is also an arc-shaped elongated through hole, which makes the air outlet area of ​​the air guide 111c larger, so that the second air duct 114 has a larger area of ​​airflow for drying hair and enhances the drying efficiency.

[0094] Furthermore, the first mating part 111a is provided with an extension part 1111b. The extension part 1111b and the second mating part 111b are arranged in a radial stack on the air duct shell 11 and cooperate to form an air guide gap 111d. The air guide gap 111d is connected to the air guide port 111c so that the airflow in the air guide duct 113 flows through the air guide gap 111d and the air passage 111c in sequence before flowing into the second air duct 114.

[0095] In addition, the side of the extension 1111b used to construct the air guide slit 111d has an arc surface structure.

[0096] For example, the extension 1111b can be a straight structure extending parallel to the axis of the duct shell 11 (such as a straight plate), except that the side of the extension 1111b that forms the air guide gap 111d (that is, the side facing the second mating part 111b) is an arc-shaped surface, and the arc-shaped surface is curved toward the duct shell 11b; or the extension 1111b can be an arc-shaped structure as a whole (such as an arc-shaped plate), in which case the side of the extension 1111b used to form the air guide gap 111d (that is, the side facing the second mating part 111b) is an arc-shaped surface.

[0097] Thus, when the airflow passes through the air guide slit 111d, the Coanda Effect is generated. That is, when the airflow passes through the air guide slit 111d, it flows closely along the arc surface of the extension 1111b and forms a spiral airflow field, which helps to adsorb the hair in the receiving cavity 111 onto the side wall of the inner shell 11a of the blower, thereby reducing the pulling damage to the hair.

[0098] In this application, the width of the air guide gap 111d is 0.5mm to 0.7mm. Thus, the width of the air guide gap 111d can be reasonably set according to the performance parameter requirements of different hair dryers 100, so that different air volumes are obtained within the second air duct 114, thereby enabling the hair dryer 100 to achieve different hair drying effects.

[0099] For example, in one embodiment, the width of the air guide slit 111d is 0.6 mm.

[0100] Please continue reading. Figures 4 to 6 Furthermore, based on any of the above embodiments, a flow guiding structure 14 is provided on the extension 1111b. The flow guiding structure 14 is located within the air guiding gap 111d and is used to guide the airflow in the air duct 113 to converge and flow toward the second heating element 13.

[0101] In this application, the second heating element 13 is aligned with the air duct 111c, and the length of the second heating element 13 along the arc direction of the inner shell 11a of the air duct is the same as the length of the air duct 111c along the arc direction of the inner shell 11a of the air duct. The superimposed flow guiding structure 14 guides the airflow, so that the airflow flowing through the air duct 111c can completely flow through the second heating element 13 and be heated by the second heating element 13 to generate more hot airflow for drying hair. This avoids the airflow flowing out of the air duct 111c from excessively diffusing and exceeding the size of the second heating element 13, reducing the amount of hot airflow generated, and thus affecting the drying efficiency of the second air duct 114 for hair.

[0102] For example, the airflow guiding structure 14 includes a plurality of guide vanes 141, which are spaced apart on the extension 1111b along the length of the airflow guide gap 111d. When the airflow passes through the airflow guide gap 111d, it specifically flows through the gap between two adjacent guide vanes 141 and is guided by the guide vanes 141, so that the airflow that finally flows out from the airflow guide port 111c is effectively converged.

[0103] More specifically, the plurality of guide vanes 141 include a first guide vane 141a, a plurality of second guide vanes 141b and a plurality of third guide vanes 141c. The first guide vane 141a, the second guide vane 141b and the third guide vane 141c are all flat thin sheets. The thin sheets can be integrally formed with the inner shell 11a of the air duct or they can be detachably assembled.

[0104] In one embodiment, the first guide vane 141a is arranged on the extension 1111b and is located at the middle position along the arcuate length of the air guide gap 111d, and the first guide vane 141a is parallel to the axis of the air duct housing 11. A plurality of second guide vanes 141b are arranged side-by-side in a straight line at intervals on one side of the first guide vane 141a, and are all inclined towards the first guide vane 141a, that is, the first guide vane 141a is set at an angle to the axis of the air duct housing 11. Similarly, a plurality of third guide vanes 141c are arranged side-by-side in a straight line at intervals on the other side of the first guide vane 141a, and are all inclined towards the first guide vane 141a, so as to achieve an angle with the axis of the air duct housing 11. At this time, the same end of the first guide vane 141a, the second guide vane 141b, and the third guide vane 141c all point towards the second heating element 13, so as to converge the airflow and guide the airflow towards the second heating element 13.

[0105] Please continue reading. Figures 4 to 6 In another embodiment, the inner wall of the duct inner shell 11a, which is used to construct the second air duct 114, is recessed to form an installation groove 111e. The second heating element 13 is installed in the installation groove 111e. The second heating element 13 has a first surface 131 facing away from the duct outer shell 11b. The first mating part 111a has a second surface 1111a facing away from the duct outer shell 11b. Both the first surface 131 and the second surface 1111a adopt a streamlined arc surface structure and are smoothly connected.

[0106] The second heating element 13 is embedded in the mounting groove 111e. The sidewall of the mounting groove 111e forms a clamping effect on the second heating element 13, which improves the installation firmness of the second heating element 13. At the same time, it can smoothly connect the first surface 131 of the second heating element 13 with the second surface 1111a of the first mating part 111a. That is, the first surface 131 and the second surface 1111a are constructed as a continuous and smooth streamlined arc surface. This streamlined arc surface extends from the air guide 111c to the air outlet 115 and forms the flow channel wall of the second air duct 114. This design allows the airflow in the air duct 113 to flow through the air guide gap 111d and out of the air guide port 111c, so that the airflow can flow closely along the streamlined arc surface to form a wall adhesion effect. In other words, due to the guiding effect of the streamlined arc surface, the airflow can naturally adhere to the flow channel wall of the streamlined arc surface structure and form a stable airflow layer. This not only effectively reduces the energy loss of the airflow in the second air duct 114 and ensures smooth airflow, but also avoids the generation of turbulence and vortex phenomena, so that the airflow can be delivered to the second air outlet 114a more stably and orderly.

[0107] Furthermore, the airflow blown out from the air vent 111c, under the Coanda effect, will flow along the hair surface near the C-shaped opening of the air outlet 115 of the air duct housing 11, and adsorb the hair onto the wall of the inner shell 11a of the air duct. Specifically, since the airflow has a certain speed and kinetic energy, according to the Coanda effect, the airflow will be attracted and attached to the hair surface, flowing and bending with the shape of the hair, forming an airflow wrapping effect around the hair. This effect not only makes the airflow act on the hair more evenly and improves the drying efficiency, but also reduces the direct impact of the airflow on the hair and protects the hair from damage.

[0108] Please continue reading. Figure 1 , Figure 3 and Figure 5Furthermore, based on any of the above embodiments, the duct housing 11 further includes a mounting body 116. The duct housing 11b has an air inlet 112b, and the mounting body 116 is installed at the air inlet 112b. Both the air inlet 112b and the mounting body 116 are arranged on the radial side of the duct housing 11b. The mounting body 116 protrudes from the outer wall of the duct housing 11b. By connecting the mounting body 116 to the handle 20, the duct structure 10 and the handle 20 can be assembled and fixed.

[0109] For example, one of the mounting body 116 and the handle 20 is provided with a locking body, and the other of the mounting body 116 and the handle 20 is provided with a fastening position. The locking body and the fastening position can be disassembled and engaged. Not only are the mounting body 116 and the handle 20 easy to install and have high connection strength, but they are also easy to disassemble, which facilitates the inspection and maintenance of the air source and other internal components of the handle 20.

[0110] Please continue reading. Figure 3 The installation body 116 has a diversion air duct 1161 inside. The diversion air duct 1161 is connected to the first air duct 112 and the diversion air duct 113 through the air inlet 112b. The inner shell 11a of the air duct is provided with a diversion structure 111f facing the air inlet 112b.

[0111] The handle 20 has an internal air supply channel that connects to a distribution channel. High-speed airflow generated by the air source is delivered into the distribution channel via the air supply channel, and then contacts the distribution structure 111f through the air inlet 112b. The distribution structure 111f divides the airflow, causing a portion to flow into the first air duct 112 and the other portion into the guiding air duct 113, and then through the air guide 111c into the second air duct 114. This achieves a dual-channel drying effect for the hair via the first air duct 112 and the second air duct 114. This airflow path is simple and smooth, ensuring continuous and reliable airflow while minimizing wind noise, significantly improving the performance and user experience of the hair dryer 100.

[0112] To meet diverse user needs and accommodate different hair styles and drying requirements, the hair dryer 100 typically features multiple operating modes that can be flexibly switched between. For example, operating modes may include, but are not limited to, hot air mode, cold air mode, and warm air mode. The airflow from the first air duct 112 and the second air duct 114 located between the first air duct 112 differs in each mode, necessitating a proper allocation of airflow between the first air duct 112 and the second air duct 114.

[0113] In an alternative embodiment, the diversion structure 111f is configured to be movable, such that the diversion structure 111f can adjust the gas flow rate from the diversion duct 1161 into the first duct 112 and the diversion duct 113.

[0114] In one embodiment, the flow splitting structure 111f divides the air inlet 112b into a first air inlet and a second air inlet. The first air inlet is connected to the first air duct 112, and the second air inlet is connected to the diversion air duct 113. By making the flow splitting structure 111f movable, the opening size of the first air inlet and the second air inlet can be flexibly changed, thereby controlling the airflow into the first air duct 112 and the diversion air duct 113, and thus achieving the purpose of dynamically distributing the airflow in the first air duct 112 and the second air duct 114.

[0115] In one embodiment, the flow splitting structure 111f can be a damper, which is highly feasible and has a good effect on airflow distribution.

[0116] In another embodiment, in hot air mode, the first air duct 112 provides the main hot airflow, while the airflow in the second air duct 114 assists in evenly distributing heat and reducing wind speed. In this case, the airflow rate flowing into the first air duct 112 needs to be adjusted to be greater than the airflow rate flowing into the second air duct 114. In cold air mode, the airflow rate entering the second air duct 114 can be appropriately increased, while the airflow rate in the first air duct 112 can be correspondingly decreased, so as to utilize the gentler airflow in the second air duct 114 to quickly dry the hair.

[0117] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0118] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A duct structure, characterized by, Including the air duct casing; The interior of the air duct shell has a first air duct, and the first air duct has a first air outlet. The shell wall of the air duct housing has a receiving cavity, and at least a portion of the space in the receiving cavity forms a second air duct. The second air duct has a second air outlet, and the first air outlet and the second air outlet are located at the same end of the air duct housing. The shell wall of the air duct is provided with an air guide port, which is connected to the second air duct; The first air duct and the air guide are both used to connect to the air source. The first air duct is used to transport the first part of the airflow generated by the air source, and the air guide is used to guide the second part of the airflow generated by the air source into the second air duct. The second air duct is used to transport the second part of the airflow.

2. The duct structure according to claim 1, wherein The interior of the air duct shell also forms an air diversion channel, which is used to connect the air guide port to the air source.

3. The ventilation duct structure according to claim 2, characterized in that, The receiving cavity is a hollow cavity that runs through the two opposite ends of the axial direction of the air duct shell. One axial end of the air duct shell is the air outlet end. The first air outlet is opened on the annular end face of the air outlet end and surrounds the outer periphery of the second air outlet.

4. The ventilation duct structure according to claim 3, characterized in that, The duct housing includes an inner duct shell and an outer duct shell. The inner duct shell is sleeved and connected to the inside of the outer duct shell. The inner duct shell and the outer duct shell cooperate to form the first air duct and the drainage air duct.

5. The ventilation duct structure according to claim 4, characterized in that, Both the inner shell and the outer shell of the air duct are semi-closed annular structures, so that an opening is formed on the radial side of the air duct shell. The opening communicates with the receiving cavity and passes through the two opposite ends of the air duct shell in the axial direction. The first air duct surrounds the outer periphery of the second air duct.

6. The ventilation duct structure according to claim 4, characterized in that, The air duct structure also includes a first heating element, which is disposed inside the first air duct.

7. The ventilation duct structure according to claim 6, characterized in that, The air duct structure also includes a second heating element, which is disposed on the side wall of the second air duct. The second heating element and the air guide are aligned along the axial direction of the air duct shell, and the second heating element is arranged closer to the air outlet than the air guide.

8. The ventilation duct structure according to claim 7, characterized in that, The air duct structure also includes a control device, which is connected to the first heating element and / or the second heating element; Alternatively, the first heating element and the second heating element are connected in a heat transfer connection.

9. The ventilation duct structure according to claim 7, characterized in that, The inner shell of the air duct is provided with a first mating part and a second mating part, and the first mating part and the second mating part are spaced apart along the axial direction of the air duct shell to form the air guide.

10. The ventilation duct structure according to claim 9, characterized in that, The first mating part is provided with an extension part, and the extension part and the second mating part are arranged in a radial stack and cooperate to form an air guide gap. The air guide gap is connected to the air guide port, and the extension part is used to construct the side of the air guide gap as an arc surface structure. The width of the air guide gap is 0.5mm to 0.7mm.

11. The ventilation duct structure according to claim 10, characterized in that, The extension is provided with a flow guiding structure, which is located within the air guide gap. The flow guiding structure is used to guide the airflow in the air duct to converge and flow toward the second heating element.

12. The ventilation duct structure according to claim 11, characterized in that, The airflow guiding structure includes multiple airflow guiding vanes, which are spaced apart on the extension along the length of the airflow guiding gap.

13. The ventilation duct structure according to claim 12, characterized in that, The plurality of guide vanes include a first guide vane, a plurality of second guide vanes, and a plurality of third guide vanes. The first guide vane is arranged parallel to the axis of the duct housing. The plurality of second guide vanes are arranged side by side at intervals on one side of the first guide vane and are all inclined toward the first guide vane so that the first guide vane is set at an angle to the axis of the duct housing. The plurality of third guide vanes are arranged side by side at intervals on the other side of the first guide vane and are all inclined toward the first guide vane so that the third guide vane is set at an angle to the axis of the duct housing.

14. The ventilation duct structure according to claim 9, characterized in that, The inner shell of the air duct is provided with an installation groove on the inner wall for constructing the second air duct. The second heating element is installed in the installation groove. The second heating element has a first surface that is away from the outer shell of the air duct. The first mating part has a second surface that is away from the outer shell of the air duct. Both the first surface and the second surface adopt a streamlined arc surface structure and are smoothly connected.

15. The ventilation duct structure according to claim 4, characterized in that, The duct housing also includes a mounting body. The outer shell of the duct has an air inlet. The mounting body is installed at the air inlet. A diversion duct is formed inside the mounting body. The diversion duct is connected to the first duct and the guide duct through the air inlet. A diversion structure is provided on the inner shell of the duct facing the air inlet.

16. The ventilation duct structure according to claim 15, characterized in that, The diversion structure is configured to be movable, allowing it to adjust the gas flow rate from the diversion duct into the first duct and the diversion duct.

17. A hair dryer, characterized in that, include: The handle, wherein an air source is installed inside the handle; as well as The air duct structure as described in any one of claims 1 to 16, wherein the air duct structure is connected to the handle, and the air source is used to supply air to the first air duct and the diversion air duct.

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