Drying apparatus

Abstract

This application discloses a drying device (10) including a housing (11) having an air inlet (111), and an airflow assembly (14) for forming an airflow within the housing (11), wherein the airflow direction downstream of the airflow assembly (14) is a first direction; an air guide structure (12) installed on the housing (11) and located upstream of the airflow assembly (14), the air guide structure (12) including a plurality of sub-parts (121), each of the sub-parts (121) having a ventilation section (1212) through which airflow can flow and an air guide section (1211) for guiding the airflow to the ventilation section (1212); the air inlet (111) is configured such that airflow entering the housing (11) from the air inlet (111) is guided to each of the air guide sections (1211).

Description

Technical Field

[0001] This application relates to the technical field of drying equipment, and particularly to drying equipment. Background Technology

[0002] A hair dryer is a device that outputs hot air. When a user uses a hair dryer, the airflow component inside the hair dryer operates and draws in outside air from the air inlet to form an airflow. Some existing hair dryers, in addition to the main airflow duct for outputting airflow, also have an auxiliary airflow duct. Airflow is introduced into the auxiliary airflow duct in the expectation that it will dissipate heat from related internal structures.

[0003] However, because the main air duct generates a large negative pressure, it will draw most of the airflow near the air inlet into its interior, making it difficult for the auxiliary air duct to draw in air to form sufficient airflow and thus failing to achieve its design purpose. Summary of the Invention

[0004] This application provides a drying device designed to solve the problem of difficulty in ensuring airflow in the auxiliary air duct of blowers in the present technology.

[0005] This application provides a drying device, including a housing with an air inlet, and an airflow assembly for forming an airflow within the housing, wherein the airflow direction downstream of the airflow assembly is a first direction; an air guide structure installed on the housing and located upstream of the airflow assembly, the air guide structure including multiple sub-parts, each sub-part having a ventilation section through which airflow can flow and an air guide section for guiding the airflow to the ventilation section; the air inlet is configured such that airflow entering the housing from the air inlet is guided to each of the air guide sections.

[0006] The drying equipment in this application embodiment has an air guide structure that works in conjunction with the air inlet to distribute the intake airflow into the main air duct and the auxiliary air duct according to a preset ratio, so that both the main air duct and the auxiliary air duct have sufficient airflow to achieve their respective design objectives.

[0007] Additional aspects and advantages of the embodiments of this application 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 this application. Attached Figure Description

[0008] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:

[0009] Figure 1 This is a partial structural schematic diagram of the drying equipment in some embodiments of this application;

[0010] Figure 2This is a schematic diagram of the housing and air guide structure in some embodiments of this application;

[0011] Figure 3 This is a schematic diagram of the air guide structure in some embodiments of this application;

[0012] Figure 4 This is a schematic diagram of the air guide structure in some other embodiments of this application;

[0013] Figure 5 and Figure 6 This is a schematic diagram of the filter assembly of the drying device in some embodiments of this application;

[0014] Figure 7 This is a schematic diagram of the removal of the filter assembly in a drying device according to certain embodiments of this application;

[0015] Figure 8 This is a schematic diagram of a filtering component in some embodiments of this application;

[0016] Figure 9 This is a schematic diagram showing the removal of the dust cover from the filter assembly in some embodiments of this application;

[0017] Figure 10 This is a schematic diagram of a dust cover in some embodiments of this application;

[0018] Figure 11 This is a schematic diagram of the overall structure of the drying equipment in some embodiments of this application. Detailed Implementation

[0019] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of this application, and should not be construed as limiting the embodiments of this application.

[0020] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used 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. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0022] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] This disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described herein. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0024] like Figure 1 As shown, this application provides a drying device 10, including a housing 11, an airflow assembly 14, and an air guide structure 12. During operation, the drying device 10 outputs airflow to dry a target object. The drying device 10 can be a hair dryer, in which case the corresponding target object is hair; the drying device 10 can also be a hand dryer, a dryer, etc.

[0025] Multiple air ducts are formed inside the housing 11. The air duct containing the airflow assembly 14 is called the main air duct a, and the others are called auxiliary air ducts b. The approximate flow direction of each airflow is shown in the diagram with dashed arrows, where the airflow direction downstream of the airflow assembly 14 in the main air duct a is the first direction. When the airflow assembly 14 operates, it generates negative pressure in the main air duct a, drawing in air from the outside to form a high-speed airflow. This high-speed airflow is then output from the housing 11 and used to dry the target object. Influenced by the main air duct a, airflow is also formed in the auxiliary air duct b. This airflow can dissipate heat from related structures in the auxiliary air duct b (such as circuit boards, motor control boards, radiation components, power supply components, and other heat-generating structures), thus preventing these structures from affecting the smoothness of the airflow in the main air duct a while dissipating heat.

[0026] refer to Figure 1 , Figure 2 , Figure 3 As shown, the air guide structure 12 is installed inside the housing 11 and is located upstream of the airflow assembly 14. The air guide structure 12 includes multiple sub-sections, each corresponding to a specific air duct. For ease of description, the sub-section corresponding to the main air duct a is referred to as the first sub-section 121, and the sub-section corresponding to the auxiliary air duct b is referred to as the second sub-section 122. It is readily understood that the drying equipment 10 has at least one main air duct a and one auxiliary air duct b, therefore the air guide structure 12 includes at least the first sub-section 121 and the second sub-section 122. In other embodiments, the drying equipment 10 has a greater number of auxiliary air ducts b, and the number of sub-sections on the air guide structure 12 can be multiple, such as three, five, six, etc., where at least one sub-section corresponds to the main air duct a, and multiple sub-sections correspond to the auxiliary air ducts b respectively.

[0027] The following description uses a drying device 10 having a main air duct a and an auxiliary air duct b as an example to illustrate various embodiments of this application. Accordingly, the air guiding structure 12 has a first sub-part 121 and a second sub-part 122, which are adjacent to each other. The following description refers to the connection between the first sub-part 121 and the second sub-part 122. In other embodiments, the air guiding structure 12 has more sub-parts. The above description of the connection corresponds to the connection relationship between any two adjacent sub-parts, and should not be construed as specifically referring to the connection relationship between the first sub-part 121 corresponding to the main air duct a and the second sub-part 122 corresponding to the auxiliary air duct b.

[0028] In the first sub-section 121, at least a portion forms a first ventilation section 1212, and at least a portion forms a first air guide section 1211. The first ventilation section 1212 allows airflow to pass through; that is, airflow located outside the air guide structure 12 (facing the exterior of the drying device 10) can enter the interior of the air guide structure 12 (facing the interior of the drying device 10) from the first ventilation section 1212 and then enter the main air duct a. The first air guide section 1211 is used to guide the airflow to the first ventilation section 1212. In other words, part of the airflow flowing to the first sub-section 121 directly enters the main air duct a from the first ventilation section 1212, while the other part is guided before entering the main air duct a from the first ventilation section 1212.

[0029] Similarly, the airflow flowing towards the second sub-section 122, part of it directly enters the auxiliary air duct b from the second ventilation section 1222, and the other part is guided to the second ventilation section 1222 by the second air guide section 1221, and then passes through the second ventilation section 1222 to enter the auxiliary air duct b.

[0030] The housing 11 is provided with an air inlet 111, which is located upstream of the air guide structure 12 and is in communication with the external air. The air inlet 111 is configured to guide the airflow passing through it, directing the airflow entering the housing 11 from the air inlet 11 to each air guide section.

[0031] When the drying equipment 10 is running, since the airflow assembly 14 is located within the main air duct a, the length of the flow path from the first ventilation section 1212 to the airflow assembly 14 is shorter than the length of the flow path from the second ventilation section 1222 to the airflow assembly 14; and / or, the overall air resistance from the first ventilation section 1212 to the airflow assembly 14 is less than the overall air resistance from the second ventilation section 1222 to the airflow assembly 14. Accordingly, a larger negative pressure is formed at the first ventilation section 1212, and a smaller negative pressure is formed at the second ventilation section 1222.

[0032] Assuming the total airflow drawn into the drying equipment 10 from the air inlet 111 remains constant, the greater the airflow entering the main air duct a, the less airflow enters the auxiliary air duct b, and vice versa. For simplicity, the ratio of the airflow in the main air duct a to the airflow in the auxiliary air duct b will be referred to as the main-auxiliary air duct flow ratio.

[0033] A larger main-to-auxiliary airflow ratio results in less airflow in auxiliary airflow duct b, which can hinder effective heat dissipation for the relevant structures. Conversely, a smaller main-to-auxiliary airflow ratio results in less airflow in main airflow duct a, leading to insufficient drying efficiency. Furthermore, since the negative pressure in main airflow duct a is greater than that in auxiliary airflow duct b, the main-to-auxiliary airflow ratio can easily become too large. Therefore, the air guide structure 12 in this embodiment, in conjunction with the relevant structures, ensures that the main-to-auxiliary airflow ratio is within a suitable range, ensuring that both main airflow duct a and auxiliary airflow duct b have sufficient airflow to achieve their respective design objectives.

[0034] Specifically, the air in the external environment is directed twice before entering the main air duct a and the auxiliary air duct b:

[0035] First guidance: The air inlet 111 guides the airflow to the first air guide section 1211 and the second air guide section 1221. It can also be understood that the purpose of the first guidance is to avoid the formation of a straight airflow path between the first ventilation section 1212, the second ventilation section 1222 and the external environment.

[0036] Secondary guidance: The first air guide 1211 guides the airflow to the first ventilation section 1212 and into the main air duct a, and the second air guide 1221 guides the airflow to the second ventilation section 1222 and into the auxiliary air duct b.

[0037] By adjusting the area and position of the first air guide section 1211 and the second air guide section 1221, as well as the actual guiding direction of the air inlet 111, the proportion of airflow obtained by the first air guide section 1211 and the second air guide section 1221 from the air inlet 111 can be changed, thereby changing the flow ratio of the main and auxiliary air ducts. More specifically, the larger the area of ​​the first air guide section 1211 / second air guide section 1221 and the closer its position is to the downstream direction of the airflow direction of the air inlet 111, the greater the proportion of airflow obtained, and vice versa.

[0038] In the two guidance methods mentioned above, if the first guidance method is missing, for example, if the air guide structure 12 is directly connected to the external environment, both the first ventilation section 1212 and the second ventilation section 1222 can form a straight airflow path with the external environment. According to aerodynamics, air will flow along the shortest path to the area with the greatest negative pressure. Therefore, almost all the airflow will flow along the straight path to the first ventilation section 1212, and only a weak airflow will flow to the second ventilation section 1222.

[0039] If a secondary guide is lacking, for example, if the air inlet 111 directly guides the airflow to the first ventilation section 1212 and the second ventilation section 1222, then the first ventilation section 1212 will still form a straight airflow path with the external environment, causing almost all the airflow to enter the main air duct a, with only a small amount flowing into the auxiliary air duct b. Both of these situations will prevent the first air guide section 1211 and the second air guide section 1221 from fulfilling their functions of guiding and distributing airflow, ultimately resulting in an excessively high flow rate ratio between the main and auxiliary air ducts.

[0040] As can be seen from the above, the drying equipment 10 in this application embodiment guides the airflow through the air inlet 111 and the air guide structure 12, and can control the flow ratio of the main air duct and the auxiliary air duct, so that both the main air duct a and the auxiliary air duct b have sufficient airflow.

[0041] In such Figure 3 In some embodiments shown, the first air guide section 1211 and the second air guide section 1221 on the air guide structure 12 are arranged adjacent to each other. It can also be understood that the first ventilation section 1212 and the second ventilation section 1222 are separated by the first air guide section 1211 and the second air guide section 1221 on the air guide structure 12. The air inlet 111 can generally guide the airflow to the area where the first air guide section 1211 and the second air guide section 1221 are located, and the first air guide section 1211 and the second air guide section 1221 respectively guide the airflow on their surfaces to the first ventilation section 1212 and the second ventilation section 1222. In this way, the air guiding accuracy requirement at the air inlet 111 can be reduced, and the overall direction of the airflow can be roughly determined to be towards the area where the two air guide sections are located. Furthermore, by adjusting the ratio of the area occupied by the first air guide section 1211 and the second air guide section 1221, the flow rate ratio of the main and auxiliary air ducts can be adjusted. In some other embodiments not shown, the first air guide section 1211 and the second air guide section 1221 are not arranged adjacent to each other, and the air inlet 111 guides the airflow to the first air guide section 1211 and the second air guide section 1221 respectively.

[0042] In such Figure 3 In some embodiments shown, a stepped structure 123 is formed between the first air guide 1211 and the second air guide 1221. The first air guide 1211 forms the top of the stepped structure 123, and the second air guide 1221 forms the bottom of the stepped structure 123. The stepped structure 123 has a stepped sidewall 1231 connecting the first air guide 1211 and the second air guide 1221.

[0043] The sidewall 1231 of the step creates significant wind resistance to airflow flowing towards it. Airflow from the bottom to the top of the step is affected by the wind resistance of the sidewall 1231; conversely, airflow from the top to the bottom of the step can directly cross the sidewall 1231 with almost no wind resistance. Therefore, the step structure 123 can act as a unidirectional wind guide.

[0044] Specifically, the airflow in the first air guide section 1211 located at the top of the step can flow both along the first air guide section 1211 to the first ventilation section 1212 and across the step structure 123 to the second air guide section 1221. However, the airflow in the second air guide section 1221 located at the bottom of the step is obstructed by the wind resistance of the step side wall 1231 when it flows towards the first air guide section 1211, making it difficult to flow across to the top of the step, and can only flow towards the second ventilation section 1222.

[0045] As mentioned above, the first ventilation section 1212 corresponding to the main air duct a has a large negative pressure, while the second ventilation section 1222 corresponding to the auxiliary air duct b has a smaller negative pressure. When the negative pressure difference between the two is large, the airflow in the second air guide section 1221 will be affected by the negative pressure of the first ventilation section 1212 and flow towards the first ventilation section 1212, ultimately resulting in insufficient air intake in the auxiliary air duct b. After setting the aforementioned stepped structure 123, a one-way wind resistance can be formed, blocking the airflow in the second air guide section 1221 from flowing towards the first ventilation section 1212, thereby ensuring sufficient airflow in the auxiliary air duct b.

[0046] Furthermore, adjusting the angle of the step sidewall 123, the closer the angle between it and the plane at the bottom of the step structure 123 (i.e., the second air guide 1221) is to a right angle, the greater the air resistance formed by the step sidewall 123. Adjusting the dimensions of the step sidewall 1231 (i.e., the distance between the top and bottom of the step structure 123 along the axis of the air guide structure 12), the larger the area of ​​the step sidewall 1231, the greater the airflow it can influence. Both of these situations will increase the airflow entering the second ventilation section 1222, thus reducing the main-auxiliary airflow ratio. Therefore, without changing other structures and parameters in the drying equipment 10, the main-auxiliary airflow ratio can be adjusted by adjusting the angle and dimensions of the step sidewall 1231. It should be noted that the various methods for adjusting the main-auxiliary airflow ratio mentioned above and below should be understood as either adjusting the main-auxiliary airflow ratio individually or together, and will not be repeated below.

[0047] In other embodiments not shown, a bidirectional air resistance structure can be designed at the connection between the first air guide 1211 and the second air guide 1221. For example, a convex ring structure, with its outer wall facing the second air guide 1221 and forming a large air resistance, and its inner wall facing the first air guide 1211 and forming a large air resistance, with the convex ring structure as the boundary, preventing airflow between the first air guide 1211 and the second air guide 1221.

[0048] exist Figure 4 In some embodiments shown, the first air guide section 1211 and the second air guide section 1221 on the air guide structure 12 are located on the same surface. It can also be understood that there is no clear boundary between the first air guide section 1211 and the second air guide section 1221, and the airflow can flow freely along this surface, resulting in lower wind resistance and wind noise, which is suitable for drying equipment 10 with a small negative pressure difference between the first ventilation section 1212 and the second ventilation section 1222.

[0049] The "same surface" mentioned above is not limited to a plane, for example... Figure 4 As shown, the air guide structure 12 has an arc-shaped surface, and both the first air guide portion 1211 and the second air guide portion 1221 are formed on this arc-shaped surface. In other embodiments not shown, the air guide structure 12 has a plane, and the first air guide portion 1211 and the second air guide portion 1221 are formed on the plane. In other embodiments not shown, the first air guide portion 1211 and the second air guide portion 1221 are not on the same plane, but the part connecting them is a smooth curved surface, and there is no significant change in air resistance when the airflow flows between the first air guide portion 1211 and the second air guide portion 1221.

[0050] like Figure 2 and Figure 3 In some embodiments shown, on any plane perpendicular to the first direction, the first sub-part 121 is circular or annular, and the second sub-part 122 is annular and surrounds the outside of the first sub-part 121, with a stepped structure 123 formed at their junction. The central region of the air guide structure 12 forms the first sub-part 121, corresponding to the main air duct a. In some more specific embodiments, the airflow assembly 14 coincides with the axis of the air guide structure 12, and the first sub-part 121 is positioned near the central region around the axis of the air guide structure 12 to ensure uniform airflow into the main air duct a in the radial direction.

[0051] The outer edge region of the air guiding structure 12 forms a second sub-section 122, corresponding to the auxiliary air duct b surrounding the outer edge of the main air duct a. Other related structures are provided between the main air duct a and the auxiliary air duct b to isolate them, so as to avoid airflow mixing affecting the smoothness of airflow in the main air duct a.

[0052] In some more specific embodiments, the inner wall of the housing 11 forms a side wall of the auxiliary air duct b. When the airflow in the auxiliary air duct b flows along the inner wall of the housing 11, it can dissipate heat from the housing 11, so that the user will not feel overheating when touching the housing 11 of the drying device 10.

[0053] like Figure 2 and Figure 3 As shown, in some more specific embodiments, on any plane perpendicular to the first direction, the projections of the first ventilation section 1212, the first air guide section 1211, the second air guide section 1221, and the second ventilation section 1222 form a nested circle or ring from largest to smallest. (Combined with...) Figure 1 As shown, the air inlet 111 is projected to form an annular or circular shape, and at least partially overlaps with the shapes formed by the projections of the first air guide 1211 and the second air guide 1221.

[0054] When the airflow assembly 14 is running, it creates a negative pressure inside the housing 11. After the airflow enters from the annular or circular air inlet 111, it will be guided to flow to the first air guide 1211 and the second air guide 1221, and will be evenly distributed radially along the annular or circular path, flowing to the first ventilation section 1212 and the second ventilation section 1222, so that the main air duct a and the auxiliary air duct b can be evenly inhaled radially, each forming a relatively smooth airflow.

[0055] In such Figure 3 In some embodiments shown, a portion of the first sub-part 121 is shaped like any one of a frustum, a truncated cone, a pyramid, or a cone, and has an inclined sidewall 1213 that is tilted relative to a first direction. One or more first through holes are provided on the inclined sidewall 1213 for airflow to pass through, and these one or more first through holes constitute a first ventilation section 1212. The inclined first ventilation section 1212 helps reduce wind noise during airflow guidance and can also guide the passing airflow to a certain extent.

[0056] Furthermore, the greater the slope of the inclined sidewall 1213, the larger its surface area, and the larger the area that the first ventilation section 1212 can accommodate, which is equivalent to increasing the air intake of the main air duct a. Therefore, the flow ratio of the main and auxiliary air ducts can also be adjusted by adjusting the slope of the inclined sidewall 1213.

[0057] In such Figure 3 In some embodiments shown, along the first direction, the second air guide portion 1221 expands outward and forms an inclined air guide surface; the inner edge of the air guide surface forms the bottom of the stepped structure 123, and the outer edge connects to the second ventilation portion 1222. The airflow flowing to the second air guide portion 1221 can be guided to the second ventilation portion 1222 along the inclined air guide surface. The purpose of the inclined air guide surface is still to reduce wind noise during airflow guidance.

[0058] In such Figure 3 In some embodiments shown, the air guiding surface formed by the second air guide 1221 and the air inlet surface of the second ventilation section 1222 are located on the same plane. This allows airflow to flow along the air guiding surface and smoothly enter the second ventilation section 1222 without generating wind noise. It should be noted that the aforementioned "same plane" is not limited to a mathematically defined "plane," but can also be a curved surface, arc surface, etc., where there is no obvious abrupt change in curvature and / or a smooth transition at the connection point. In the illustration, the air guiding surface formed by the second air guide 1221 is approximately a portion of the side surface of a cone; correspondingly, the air inlet surface of the second ventilation section 1222 is also a portion of the side surface of a cone.

[0059] In such Figure 2 In some embodiments shown, the outer edge of the air guide structure 12 is not sealed to the housing 11, leaving a gap for airflow to pass through, which constitutes the second ventilation section 1222. In some specific embodiments, a complete gap is formed around the air guide structure 12 along its circumference, forming an annular second ventilation section 1222. In other specific embodiments, the air guide structure 12 has multiple notches spaced circumferentially, each notch forming a gap, and these multiple notches constitute the second ventilation section 1222 spaced annularly. The portion without notches can contact and be positioned with the housing 11 to ensure axial positioning between the air guide structure 12 and the housing 11. In the above embodiments, by adjusting the size of the gap, for example, increasing or decreasing the gap, the actual air intake area of ​​the second ventilation section 1222 can be changed, thereby achieving the purpose of adjusting the flow rate ratio of the main and auxiliary air ducts.

[0060] In the above embodiments, the second air guide section 1221 is actually formed by the air guide structure 12 and the housing 11 together; that is, the air guide structure 12 forms a part of the second air guide section 1221. In other embodiments not shown, one or more second through holes are provided in the second sub-part 122 of the air guide structure 12 for airflow to pass through, and the multiple second through holes constitute the second ventilation section 1222. Thus, the airflow passing through the second ventilation section 1222 does not flow through the housing 11, and it can also be understood that the entire second air guide section 1221 is formed by the air guide structure 12. By adjusting the size of the second through holes, for example, increasing or decreasing the inner diameter of the second through holes, the actual air intake area of ​​the second ventilation section 1222 can be changed, and the purpose of adjusting the flow rate ratio of the main and auxiliary air ducts can also be achieved.

[0061] like Figure 1 and Figure 3In some embodiments shown, the central portion of the air guide structure 12 protrudes away from the airflow assembly 14 and forms a cavity 124 on the side facing the airflow assembly 14, with the upstream of the airflow assembly 14 communicating with the cavity 124. At least a portion of the first ventilation section 1212 is disposed on the sidewall of the cavity 124, and the second ventilation section 1222 is not directly communicating with the cavity 124.

[0062] The airflow of the first sub-section 121 can enter the cavity 124 from the first ventilation section 1212. The airflow assembly 14 directly draws air from the cavity 124 and forms a high-speed airflow in the main air duct a. Without changing the outer diameter of the air guide structure 12 (which affects the assembly relationship with the housing 11), the greater the bulge in the middle of the air guide structure 12, the larger the surface area of ​​the sidewall of the cavity 124, which can accommodate a larger first ventilation section 1212, thereby increasing the air intake of the main air duct a and achieving the purpose of adjusting the flow ratio of the main and auxiliary air ducts.

[0063] The airflow of the second sub-section 122 does not enter the cavity 124, but enters the auxiliary air duct b from the second ventilation section 1222, thereby separating the airflow of the main air duct a and the auxiliary air duct b on the air guide structure 12.

[0064] In such Figures 5 to 8 In some embodiments shown, the drying device 10 further includes a filter assembly 13 for filtering the airflow entering the drying device 10 to prevent impurities from entering the housing 11 along with the airflow.

[0065] The filter assembly 13 includes a base 131, a filter structure 132, and a dust cover 133. The base 131 is removably installed on the air guide structure 12 and / or the housing 11 to enable the installation and positioning of the filter assembly 13 with respect to the housing 11.

[0066] A filter structure 132 is mounted on a base 131, covering the downstream of the air inlet 111 and located in the path of airflow. All air entering from the air inlet 111 flows through the filter structure 132 and is filtered. In some embodiments, the filter structure 132 includes multiple layers of filter screens with different pore sizes, each capable of filtering foreign objects of different sizes. In other embodiments, the filter structure 132 also includes a filter element with a three-dimensional structure. In still other embodiments, the filter structure 132 includes an air inlet grille for blocking larger foreign objects, such as paper, fabric, etc.

[0067] The dust cover 133 is removably installed on the air guide structure 12 and / or the base 131, and the dust cover 133 forms at least a portion of the air inlet 111. The air inlet 111 can be understood as the part of the drying equipment 10 that can directly exchange airflow with the external environment, or as the most upstream part of all structures in the entire drying equipment 10. In some specific embodiments, the dust cover 133 itself forms a complete air inlet 111, that is, the airflow only flows through the dust cover 133 when entering the drying equipment 10. In other embodiments, the dust cover 133 and other structures, such as the housing 11, the base 131, etc., together form the air inlet 111, that is, the airflow flows through the dust cover 133 and other structures when entering the drying equipment 10.

[0068] The "removable installation" of the base 131 and dust cover 133 mentioned above means that the user can install or remove them in a preset manner as needed. The drying equipment 10 can be used normally when both the base 131 and dust cover 133 are in the installed state. Unless otherwise specified below, both the base 131 and dust cover 133 are in the installed state. When one or both of the base 131 and dust cover 133 are removed, the filter assembly 13 can be cleaned to varying degrees, specifically including the following states:

[0069] (a) With the base 131 in the installed state, remove the dust cover 133. At this time, the user can clean the outer surface of the filter structure 132 (the surface facing the outside of the drying device 10) to remove foreign matter accumulated on the outer surface of the filter structure 132 and keep its outer surface clean.

[0070] (b) With the dust cover 133 installed, remove the base 131. At this time, the user can clean the inner surface of the filter structure 132 (the surface facing the inside of the drying device 10). Furthermore, since the entire filter assembly 13 is removed from the housing 11, it can be directly deep cleaned by washing with water, vacuuming, or other methods.

[0071] (c) Both the dust cover 133 and the base 131 are removed. At this point, the user can thoroughly clean all parts of the filter assembly 13.

[0072] In some specific embodiments, the user applies force to the dust cover 133, causing the entire filter assembly 13 to be removed from the housing 11, directly entering the state (b) described above for cleaning. If the cleaning needs are not met, the dust cover 133 is further removed from the base 131, entering the state (c) described above for cleaning.

[0073] In some other specific embodiments, the user applies force to the dust cover 133, causing the dust cover 133 to detach from the base 131, thus entering state (a) above for cleaning. If the cleaning needs are not met, the base 131 is further removed from the housing 11, entering state (c) above for cleaning.

[0074] In some specific embodiments, the base 131 and the air guide structure 12 are installed together by magnetic attraction. When removing the filter assembly 13, the user applies a force opposite to the magnetic force to the filter assembly 13, pulling it away from the housing 11. In other embodiments, snap-fit, bolts, or other methods can be used to achieve a detachable installation between the filter assembly 13 and the air guide structure 12 or the housing 11. In other embodiments, a rubber ring, spring plunger, or other structure can be provided between the filter assembly 13 and the housing 11 to provide greater friction during relative movement, also achieving a detachable installation of the filter assembly 13.

[0075] like Figure 7 , Figure 8 In some more specific embodiments shown, the air guide structure 12 is provided with at least one mounting portion 125 made of iron, and the base 131 is provided with at least one magnetic portion 1312 having magnetic force. Furthermore, at least one mounting portion 125 is provided with a Hall sensor (not shown) for detecting whether the magnetic portion 1312 is in place. A Hall sensor is an electrical component capable of detecting magnetic force. When the filter assembly 13 is in the installed state, the magnetic portion 1312 and the mounting portion 125 are attracted to each other, and the mounting portion 125 is magnetically conductive, thereby enabling the Hall sensor to detect the magnetic force and output an presence signal. In other embodiments, photoelectric sensors, distance sensors, cameras with image recognition, Bluetooth or RFID wireless communication, etc., can also be used to identify whether the filter assembly 13 is in place.

[0076] If the user forgets to reinstall the filter assembly 13 after cleaning, the Hall sensor will not detect the magnetic force and will not send a presence signal. In some specific embodiments, the drying device 10 is also equipped with indicator lights, a buzzer, a display screen, etc., which can send prompts in conjunction with the presence signal to remind the user whether the current drying device 10 has the filter assembly 13 installed. In some specific embodiments, the control strategy of the drying device 10 is configured such that it cannot start operation when a presence signal is not received, thereby preventing the user from using the drying device 10 without the filter assembly 13 installed.

[0077] In some specific embodiments, there are multiple mounting portions 125, which are evenly distributed along the circumference of the air guide structure 12; correspondingly, there are multiple magnetic portions 1312, which are evenly distributed along the circumference of the base 131. This provides multi-position magnetic adsorption, increasing the installation firmness of the filter structure 13.

[0078] In such Figure 7 , Figure 8 In some embodiments shown, a set or more sets of guiding components are provided between the base 131 and the housing 11 and / or the air guide structure 12 for guiding. The guiding components include a guide groove 1311 and a guide block 112 that can slide into the guide groove 1311.

[0079] During the process of the user installing the filter assembly 13 into the housing 11, the guide block 112 and the guide groove 1311 cooperate to guide and position the filter assembly 13, ensuring that the magnetic part 1312 and the mounting part 125 are aligned during installation. Thus, after the filter assembly 13 is installed in place, the corresponding magnetic part 1312 and mounting part 125 can accurately contact each other and hold the filter assembly 13 in the installed state through magnetic force.

[0080] The placement of guide block 112 and guide groove 1311 is unrestricted. Figure 7 , Figure 8 In some embodiments shown, guide groove 1311 is disposed on base 131, and guide block 112 is disposed on air guide structure 12. In other embodiments not shown, guide block 112 is disposed on base 131, and guide groove 1311 is disposed on housing 11 and / or air guide structure 12.

[0081] In some specific embodiments, the guide block 112 and the guide groove 1311 extend along the first direction. During the process of installing the filter assembly 13 into the housing 11, the guide block 112 and the guide groove 1311 cooperate to restrict the filter assembly 13 from sliding along the first direction, so as to ensure that the filter assembly 13 can be installed into the housing 11 in the correct direction without deviation.

[0082] In some specific implementation methods, such as Figure 7 and Figure 8 As shown, one end of the guide groove 1311 has an outwardly flared and inclined sidewall to facilitate the positioning of the guide block 112 when it enters the guide groove 1311. The outwardly flared and inclined sidewall gives the guide groove 1311 a larger insertion opening, reducing the positioning accuracy requirement for the guide block 112 when inserting into the guide groove 1311, and making it easier for the user to install the filter assembly 13.

[0083] In some more specific embodiments, one end of the guide block 112 has an inwardly tapered end (not shown) to facilitate positioning when the guide block 112 enters the guide groove 1311. The inwardly tapered end gives the guide block 112 a smaller insertion end, reducing the positioning accuracy requirement for the guide block 112 to enter the guide groove 1311, making it easier for the user to install the filter assembly 13.

[0084] In some more specific embodiments, one end of the guide groove 1311 has an outwardly sloping sidewall, and one end of the guide block 112 has an inwardly sloping end, which can further reduce the positioning accuracy requirement of the guide block 112 when inserted into the guide groove 1311.

[0085] In such Figure 8 In some embodiments shown, the base 131 has a plurality of magnetic portions 1312, and a portion of the magnetic portions 1312 forms a guide groove 1311. The magnetic portions 1312 of the base 131 have a larger size and correspondingly greater strength compared to other portions in order to mount magnets. The guide groove 1311 at this location can compensate for the impact of the slotting on the strength of the base 131, ensuring that the overall strength of the base 131 meets design requirements.

[0086] In such Figure 8 In some embodiments shown, the base 131 has an inner cavity 1313. A filter structure 132 is mounted at one end of the inner cavity 1313, and the other end of the inner cavity 1313 forms an opening. Figures 1 to 3 In some of the aforementioned embodiments, the first sub-section 121 of the air guide structure 12 passes through the opening and is located in the inner cavity 1313. The airflow passing through the filter structure 132 and entering the inner cavity 1313 can flow to the first sub-section 121 and enter the main air duct a.

[0087] In conjunction with the aforementioned embodiments, the air guide structure 12 protrudes in the middle away from the airflow assembly 14, and a cavity 124 is formed on the side facing the airflow assembly 14. At least a portion of the first ventilation portion 1212 is disposed on the side wall of the cavity 124. Furthermore, the greater the degree of protrusion, the greater the air intake of the main air duct a. Therefore, by adjusting the shape and size of the protrusion of the air guide structure 12, the flow ratio of the main and auxiliary air ducts can be adjusted. The inner cavity 1313 of the base 131 can accommodate the protruding portion of the air guide structure 12, and their sizes and shapes are mutually compatible to avoid structural interference.

[0088] In such Figure 8 In some more specific embodiments shown, the sidewalls of the inner cavity 1313 are provided with multiple lateral through holes 1314 through which airflow can pass. Combined with Figures 1 to 3In some of the aforementioned embodiments, the second sub-part 122 of the air guide structure 12 is located outside the inner cavity 1313, and the airflow flowing out from the lateral through-hole 1314 flows to the second sub-part 122 and enters the auxiliary air duct b. In other embodiments not shown, the sidewall of the inner cavity 1313 may be completely removed except for the magnetic part 1312 to increase the airflow entering the auxiliary air duct b.

[0089] like Figure 9 and Figure 10 In some embodiments shown, the dust cover 133 has one or more first locking blocks 1331 at its center, and the base 131 has one or more second locking blocks 1315 at its center. The first locking blocks 1331 and the second locking blocks 1315 can be locked together to realize the installation between the dust cover 133 and the base 131.

[0090] Specifically, the first card block 1331 and the second card block 1315 are configured as follows:

[0091] When the dust cover 133, which is in the preset position, rotates in the first direction, the first locking block 1331 and the second locking block 1315 lock each other, so that the dust cover 133 and the base 131 are installed together.

[0092] When the dust cover 133, which is in the preset position, rotates in the second direction, the first locking block 1331 and the second locking block 1315 separate from each other, thereby releasing the dust cover 133 from the base 131.

[0093] Since the installation and removal of the dust cover 133 involves rotation, while the installation and removal of the base 131 involves pulling, the installation and removal processes of the dust cover 133 and the base 131 do not affect each other. Specifically, when the user applies an outward pulling force to the dust cover 133, the pulling force will not cause the dust cover 133 to rotate. Therefore, the dust cover 133 can remain in its installed state and serve as a load-bearing point for removing the base 131, thereby removing the base 131 from the housing 11 and pulling it out of the housing 11. Similarly, during the process of installing the base 131 into the housing 11, when the user applies an inward pushing force to the dust cover 133, the dust cover 133 can also remain in its installed state and serve as a load-bearing point.

[0094] Combination Figure 7 , Figure 8In some of the aforementioned embodiments, a guide groove 1311 and a guide block 112 are provided between the base 131 and the housing 11 and / or the air guide structure 12 for guiding, preventing the base 131 from rotating relative to the housing 11. Therefore, when the user applies a second directional rotational force to the dust cover 133, the base 131 will not rotate accordingly. The dust cover 133 and the base 131 will rotate relative to each other until the first locking block 1331 and the second locking block 1315 separate, and the dust cover 133 and the base 131 are disengaged. Similarly, when the user applies a first directional rotational force to the dust cover 133, the first locking block 1331 and the second locking block 1315 will lock together, thus installing the dust cover 133 and the base 131 together.

[0095] In conjunction with the aforementioned embodiments, the user can either directly pull the dust cover 133 outward to remove the filter assembly 13 entirely from the housing 11, or rotate the dust cover 133 to remove it separately. Alternatively, after pulling the dust cover 133 outward to remove the filter assembly 13 from the housing 11, the user can then grip the base 131 and the dust cover 133 and apply rotational force to further remove the dust cover 133 from the filter assembly 13.

[0096] In such Figure 5 In some embodiments shown, the dust cover 133 is circular or annular, and an annular air inlet 111 is formed between the edge of the dust cover 133 and the housing 11. The annular air inlet 111 allows for uniform air intake in the radial direction.

[0097] Combination Figures 1 to 3 In the illustrated embodiment, both the first air guide 1211 and the second air guide 1221 extend in a ring shape. The ring-shaped air inlet 111 formed between the dust cover 133 and the housing 11 allows airflow to enter the housing 11 and flow along a generally ring-shaped path to the first air guide 1211 and the second air guide 1221. In other embodiments, the dust cover 133 may also have other shapes, and the ring-shaped air inlet 111 may be provided on the dust cover 133. In other embodiments, the air inlet 111 may also include a plurality of ventilation holes or perforated areas formed in a ring-shaped distribution on the housing 11.

[0098] like Figure 11 As shown, in some embodiments, the housing 11 includes a body 113 and a handle 114, wherein the handle 114 is a part that can be held by a user, and the body 113 is the part that directly outputs airflow from the drying device 10.

[0099] In such Figure 11 In some specific embodiments shown, the air inlet 111 of the drying device 10 is formed on the main body 113; therefore, the filter assembly 13 is also mounted on the main body 113, and airflow enters the main body 113 through the air inlet 111. (See also...) Figure 1As shown, the aforementioned air guiding structure 12 is installed on the main body 113, and the main air duct a and the auxiliary air duct b are both formed inside the main body 113.

[0100] In some other embodiments not shown, the air inlet 111 of the drying device 10 is formed on the handle 114, and the filter assembly 13 is correspondingly mounted on the handle 114. Airflow passes through the air inlet 111 into the handle 114, and then flows from inside the handle 114 into the main body 113 along a predetermined path. The air guide structure 12 is installed inside the handle 114, and at least a portion of the main air duct a or the auxiliary air duct b is formed in the handle 114.

[0101] In some other embodiments (not shown), both the main body 113 and the handle 114 have air inlets 111. Filter components 13 and air guide structures 12 are respectively installed on the handle 114 and the main body 113, and airflow enters the respective main body 113 and handle 114 through the corresponding air inlets 111. In some more specific embodiments, the handle 114 and the main body 113 have identical air inlets 111, and correspondingly, identical filter components 13 and air guide structures 12. In other more specific embodiments, the air inlets 111 of the handle 114 and the main body 113 have different shapes and / or sizes, corresponding to different filter components 13 and / or air guide structures 12, and can be combinations of any of the above embodiments.

[0102] In the description of this specification, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, orientations, positions, materials, or characteristics described in connection with an embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, orientations, positions, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0103] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A drying apparatus comprising a housing having an air inlet, characterised in that, Also includes: An airflow assembly is used to generate airflow within the housing, with the airflow direction downstream of the airflow assembly being a first direction; multiple air ducts are formed within the housing, with the airflow assembly located in the main air duct and the other air ducts being auxiliary air ducts; An air guide structure is installed on the housing and located upstream of the airflow assembly. The air guide structure includes multiple sub-parts, each sub-part having a ventilation section through which airflow can pass and an air guide section for guiding airflow to the ventilation section. The air guide structure includes at least a first sub-part and a second sub-part, the first sub-part corresponding to the main air duct and the second sub-part corresponding to the auxiliary air duct. The air inlet is configured such that airflow entering the housing from the air inlet is directed to each of the air guides.

2. The drying apparatus according to claim 1, characterized by In two adjacent sub-parts, the two air guides are arranged adjacent to each other.

3. The drying apparatus according to claim 2, characterized in that, Two adjacent air guides form a stepped structure, with one air guide forming the top of the stepped structure and the other air guide forming the bottom of the stepped structure; The stepped structure has stepped sidewalls connecting the two air-guiding structures, the stepped sidewalls being used to block airflow from its bottom to its top.

4. The drying equipment according to claim 3, characterized in that, The first sub-part has a first ventilation section and a first air guide section, the first air guide section being located at the top of the stepped structure; The second sub-part has a second ventilation section and a second air guide section, the second air guide section being located at the bottom of the stepped structure; The length of the flow path from the first ventilation section to the airflow assembly is shorter than the length of the flow path from the second ventilation section to the airflow assembly; and / or, the overall air resistance from the first ventilation section to the airflow assembly is less than the overall air resistance from the second ventilation section to the airflow assembly.

5. The drying apparatus according to claim 4, characterized in that On any plane perpendicular to the first direction, the first sub-part is circular or annular, the second sub-part is annular and surrounds the outside of the first sub-part, and the step structure is formed at the junction of the two.

6. The drying apparatus according to claim 4, wherein On any plane perpendicular to the first direction, the projections of the first ventilation section, the first air guide section, the second air guide section, and the second ventilation section form a nested circle or ring from largest to smallest. The air inlet projection forms an annular or circular shape, and at least partially overlaps with the shapes formed by the projections of the first air guide and the second air guide.

7. The drying apparatus according to claim 4, wherein The shape of a portion of the first sub-part is any one of a frustum, a truncated cone, a pyramid, or a cone. It has an inclined sidewall that is inclined relative to the first direction. One or more first through holes are provided on the inclined sidewall for airflow to pass through. The plurality of first through holes constitute the first ventilation section.

8. The drying apparatus according to claim 4, wherein Along the first direction, the second air guide portion expands outward and forms an inclined air guide surface; The inner edge of the air guide surface forms the bottom of the stepped structure, and the outer edge connects to the second ventilation section.

9. The drying apparatus of claim 8, wherein, The air guide surface and the air inlet surface of the second ventilation section are located on the same plane.

10. The drying apparatus according to claim 4, wherein One or more second through holes are provided on the second sub-part to allow airflow, and the plurality of second through holes constitute the second ventilation section; or, The gap between the outer edge of the air guide structure and the housing constitutes the second ventilation section.

11. The drying apparatus of claim 2, wherein Two adjacent air guide sections are formed on the same surface; or, The transition between two adjacent air guide sections is smooth.

12. The drying equipment according to claim 11, characterized in that, The shape of a portion of the air guiding structure is any one of a frustum, a truncated cone, a pyramid, or a cone, and it has an inclined sidewall that is inclined relative to the first direction, with two air guiding portions formed on the inclined sidewall.

13. The drying equipment according to claim 4, characterized in that, The air guide structure protrudes in the middle away from the airflow assembly and forms a cavity on the side facing the airflow assembly, with the upstream of the airflow assembly connected to the cavity; at least a portion of the first ventilation section is disposed on the side wall of the cavity, and the second ventilation section is not directly connected to the cavity.

14. The drying apparatus according to any one of claims 1 to 13, characterized in that, It also includes a filtering component, the filtering component comprising: The base is removably installed on the air guide structure and / or the housing; A filter structure is installed on the base and covers the air inlet; A dust cover, removably installed on the air guide structure and / or the base, forms at least a portion of the air inlet.

15. The drying apparatus of claim 14, wherein, The dust cover is circular or annular, and the edge of the dust cover forms an annular air inlet with the housing.

16. The drying apparatus of claim 14, wherein The filtration structure includes multiple layers of filter screens with different pore sizes.

17. The drying apparatus of claim 14, wherein, The air guide structure is provided with one or more first magnetic parts, and the base is provided with one or more second magnetic parts. The base and the air guide structure are installed together by magnetic attraction.

18. The drying apparatus of claim 17, wherein, At least one of the first magnetic parts is formed of iron, and the first magnetic part is provided with a Hall sensor for detecting whether the second magnetic part is in place.

19. The drying apparatus of claim 18, wherein, The number of the first magnetic parts is multiple, and they are evenly distributed along the circumference of the air guide structure; the number of the second magnetic parts is also multiple, and they are evenly distributed along the circumference of the base.

20. The drying apparatus of claim 17, wherein, One or more sets of guiding components are provided between the base and the housing and / or the air guide structure for guiding. The guiding components include a guide groove and a guide block that can slide into the guide groove.

21. The drying apparatus of claim 20, wherein, One end of the guide groove has an outwardly flared and inclined sidewall to facilitate positioning of the guide block when it enters the guide groove; and / or, One end of the guide block has an inwardly tapered and inclined end to facilitate positioning when the guide block enters the guide groove.

22. The drying apparatus according to claim 20 or 21, characterized in that, The guide block and the guide groove extend along the first direction.

23. The drying apparatus according to claim 20 or 21, characterized in that, The base has one or more magnetic parts, and each magnetic part is provided with a second magnetic part and the guide groove.

24. The drying apparatus of claim 23, wherein, The magnetic part has a cavity extending radially along the first direction, and the second magnetic part is installed in the cavity.

25. The drying apparatus of claim 14, wherein, The dust cover has one or more first locking blocks at its center, and the base has one or more second locking blocks at its center. The first locking blocks and the second locking blocks are configured as follows: When the dust cover, which is in a preset position, rotates in the first direction, the first locking block and the second locking block lock together, so that the dust cover and the base are installed together. When the dust cover, which is in a preset position, rotates in the second direction, the first locking block and the second locking block separate from each other, thereby detaching the dust cover from the base.

26. The drying apparatus of claim 14, wherein, The base has an internal cavity; The filter structure is installed at one end of the inner cavity, and the other end of the inner cavity forms an opening, with at least one of the sub-parts passing through the opening and located in the inner cavity.

27. The drying apparatus of claim 26, wherein, The inner cavity has multiple lateral through holes on its sidewalls that allow airflow to pass through; At least one of the sub-parts is located outside the inner cavity, and the airflow from the lateral through-hole flows toward the sub-part.

28. The drying apparatus according to claim 14, wherein the housing comprises a body and a handle; The air guide structure and the filter assembly are installed on the main body, and the airflow enters the main body through the air inlet; or... The air guide structure and the filter assembly are mounted on the handle, and airflow enters the handle through the air inlet; or... The main body and the handle are respectively equipped with the air guide structure and the filter assembly, and the airflow enters the main body and the handle respectively from the corresponding air inlet.

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