Drying device

Abstract

The present application provides a drying device (10) comprising a housing (11), the housing (11) is provided with a first air inlet (111), a second air inlet (112) and an air outlet (116) which are independent from one another. A main air duct, an auxiliary air duct, a wind generation assembly (12) and a radiation assembly (13) are arranged in the housing (11). The upstream of the main air duct is in communication with the first air inlet (111), and the downstream of the main air duct is in communication with the air outlet (116). The upstream of the auxiliary air duct is in communication with the first air inlet (111) and the second air inlet (112), and the downstream of the auxiliary air duct is in communication with the main air duct. The wind generation assembly (12) is mounted in the main air duct and is used for generating an air flow. The radiation assembly (13) is at least partially located in the auxiliary air duct and is used for generating infrared radiation.

Description

Drying equipment Technical Field

[0001] The present application relates to the field of drying technology, and in particular to drying equipment. Background Art

[0002] Hair dryers have internal heating structures that require heat dissipation during operation. Conventional hair dryers typically design their internal air ducts so that a portion of the airflow flows through the heating structure to dissipate heat. However, with long-term use, foreign matter such as dust and hair can accumulate on the hair dryer's air inlet filter, causing varying degrees of blockage in the air inlet. This reduces the airflow entering the hair dryer and, consequently, the airflow through the heating structure. This reduced heat dissipation efficiency can lead to an increase in the hair dryer's internal temperature, posing a safety hazard.

[0003] Summary of the Invention

[0004] The present application provides a drying device, which aims to solve the technical problem in the prior art that the heat dissipation efficiency of the internal structure of the hair dryer decreases during use.

[0005] The present application provides a drying device comprising a housing having a first air inlet, a second air inlet, and an air outlet, each of which is independent of the other. A main air duct, an auxiliary air duct, a wind assembly, and a radiation assembly are disposed within the housing. The main air duct is connected upstream to the first air inlet and downstream to the air outlet; the auxiliary air duct is connected upstream to the first air inlet and the second air inlet, and downstream to the main air duct; the wind assembly is installed in the main air duct to generate airflow; and the radiation assembly is at least partially located in the auxiliary air duct to generate infrared radiation.

[0006] Additional aspects and advantages of the embodiments of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0008] FIG1 is a schematic diagram of the drying equipment structure and airflow in certain embodiments of the present application;

[0009] FIG2 is a schematic diagram of the drying equipment structure and airflow in some other embodiments of the present application;

[0010] FIG3 is a partial enlarged schematic diagram of point A in FIG2 ;

[0011] 4 to 6 are schematic diagrams of partial airflow in drying equipment in some embodiments of the present application;

[0012] FIG7 is a partial enlarged schematic diagram of point B in FIG6 . DETAILED DESCRIPTION

[0013] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of the present application, and should not be understood as limiting the embodiments of the present application.

[0014] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting this application. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0015] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections. They can refer to mechanical connections or electrical connections. They can refer to direct connections or indirect connections through an intermediary. They can refer to internal communication between two components or interactions between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0016] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0017] The disclosure herein provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described herein. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0018] As shown in FIG. 1 , certain embodiments of the present application provide a drying device 10 , which includes a housing 11 and a wind power component 12 and a radiation component 13 disposed in the housing 11 .

[0019] The housing 11 has an air outlet 116 and mutually independent first and second air inlets 111 and 112. Mutually independent means that the first and second air inlets 111 and 112 are two different air inlets on the housing 11 and must meet at least one of the following conditions:

[0020] (1) The first air inlet 111 and the second air inlet 112 are formed in two different areas on the housing 11 and are spatially spaced a certain distance apart from each other.

[0021] (2) The air flows formed after the air enters the first air inlet 111 and the second air inlet 112 are independent of each other and will not intersect near the first air inlet 111 and the second air inlet 112.

[0022] (3) When the first air inlet 111 and the second air inlet 112 draw air from the outside, the air near one of them will not be affected by the other.

[0023] (4) The flow path formed between the first air inlet 111 and the air outlet 116 is at least partially different from the flow path formed between the second air inlet 112 and the air outlet 116 .

[0024] A main air duct a and an auxiliary air duct b are formed in the shell 11, wherein the upstream of the main air duct a is connected to the first air inlet 111, and the downstream is connected to the air outlet 116. The upstream of the auxiliary air duct b is connected to the first air inlet 111 and the second air inlet 112 at the same time, and the downstream is connected to the main air duct a. In this application, the connection between two structures or areas refers to the ability of the airflow to flow freely between the two, which can be direct or indirect. Direct connection means that the airflow enters another structure or area immediately after leaving from one structure or area; indirect connection means that the two structures or areas are connected to each other through other structures such as pipes, cavities, channels, etc., and the airflow leaves from one structure or area and flows through other structures before entering another structure or area. The following description of the connection between other structures or areas refers to the ability of the airflow to flow freely between the two interconnected structures in a direct or indirect manner, and will not be repeated. In the various figures of the embodiments of the present application, the flow direction of the airflow between the various areas inside the drying equipment 10 when the wind power component 12 is running is shown with dotted arrows, which will not be repeated below.

[0025] The wind power assembly 12 is installed in the main air duct a to generate airflow in the main air duct a. The radiation assembly 13 is at least partially located in the auxiliary air duct b, and the airflow in the auxiliary air duct b can dissipate heat from the radiation assembly 13 when it is in operation.

[0026] When the wind assembly 12 is in operation, negative pressure is directly generated within the main air duct a. Since the downstream portion of the auxiliary air duct b is connected to the portion of the main air duct a upstream of the wind assembly 12, the auxiliary air duct b also forms a negative pressure due to the influence of the main air duct a. Under the influence of the negative pressure of the main air duct a and the auxiliary air duct b, air from the external environment is drawn into the housing 11 through the first air inlet 111 and the second air inlet 112 to form an airflow. The specific airflow path is as follows:

[0027] In the auxiliary air duct b, air is sucked in through the first air inlet 111 and the second air inlet 112 to form an air flow, which flows along the auxiliary air duct b and passes through the radiation component 13 to dissipate heat. The air flow out of the auxiliary air duct b enters the main air duct a.

[0028] In the main air duct a: the air inhaled through the first air inlet 111 enters the main air duct a, constituting a part of the airflow in the main air duct a; the airflow from the auxiliary air duct b entering the main air duct a constitutes another part of the airflow in the main air duct a. The airflow in the main air duct a flows out of the drying equipment 10 from the air outlet 116 and is output to the object to be dried. In some specific embodiments, most of the airflow in the main air duct a comes from the air directly inhaled from the first air inlet 111, and a small part of the airflow comes from the auxiliary air duct b. In other specific embodiments, a small part of the airflow in the main air duct a comes from the air directly inhaled from the first air inlet 111, and most of the airflow comes from the auxiliary air duct b. In other specific embodiments, half of the airflow in the main air duct a comes from the air directly inhaled from the first air inlet 111, and the other half comes from the auxiliary air duct b.

[0029] When in operation, the radiator assembly 13 generates infrared radiation (IR) with a preset wavelength range and power density. This radiation is then directed to a target object (e.g., hair or fabric) to directly heat the target's moisture. This heat is virtually absorbed by the surrounding air through radiative heat transfer, significantly improving energy efficiency compared to traditional heat conduction methods. When the radiator assembly 13 and the wind assembly 12 operate simultaneously, the airflow and infrared radiation combine to accelerate the evaporation of moisture from the target object.

[0030] The operating principle of the radiation component 13 is based on blackbody radiation, which radiates in the infrared to visible wavelength range in the form of heat transfer. Blackbody radiation is broadband radiation, and the central wavelength and spectral bandwidth decrease with increasing temperature. The total energy of blackbody radiation is related to S×T 4 is proportional to, where S is the surface area and T is the temperature.

[0031] The radiation component 13 needs to operate within an appropriate temperature range. If the temperature of the radiation component 13 is too high during operation, the central wavelength will decrease, and the emitted infrared radiation will deviate from the preset wavelength, affecting the drying efficiency. Moreover, the radiation component 13 in a high temperature state will also heat the temperature of the components adjacent to it and the housing 11, which can easily cause the overall temperature of the drying equipment 10 to be too high. If the temperature of the radiation component 13 is too low during operation, more electrical energy will need to be converted into thermal energy to maintain its operating temperature in order to generate infrared radiation of the preset wavelength, resulting in a waste of electrical energy. Therefore, when designing the relevant structures within the drying equipment 10, it is necessary to comprehensively consider factors such as the heat dissipation area, heat dissipation requirements, heat dissipation airflow rate, and heat dissipation airflow velocity of the radiation component 13 to ensure that the radiation component 13 is always maintained within an appropriate temperature range during operation.

[0032] Traditional hair dryers are equipped with a heat dissipation air duct inside, and a part of the air flow is introduced into the heat dissipation air duct to dissipate heat from electrical structures such as the main control circuit, power supply circuit, motor, and motor control circuit. However, these electrical structures can adapt to a relatively large temperature range and are insensitive to changes in the air flow of the heat dissipation air duct. For the radiation component 13, the temperature range it can adapt to during operation is relatively small. After the temperature rises, problems such as changes in the central wavelength and spectral bandwidth are likely to occur, and the service life of the radiation component 13 will also be reduced. Therefore, compared with other electrical structures, the radiation component 13 is more sensitive to changes in the heat dissipation air flow.

[0033] In the drying device 10 in the above-mentioned embodiment of the present application, at least part of the radiation component 13 is disposed in the auxiliary air duct b. The auxiliary air duct b can simultaneously suck air from the mutually independent first air inlet 111 and second air inlet 112 to form an air flow and dissipate heat from the radiation component 13.

[0034] When both the first air inlet 111 and the second air inlet 112 are completely unobstructed (for example, a brand-new drying device 10 that has not been used), assuming that the total air flow rate S1 = a1 + b1 in the auxiliary air duct b, where a1 is the air flow rate entering the auxiliary air duct b through the first air inlet 111, and b1 is the air flow rate entering the auxiliary air duct b through the second air inlet 112.

[0035] After the first air inlet 111 is blocked, let the total air flow rate in the auxiliary air duct b be S2 = a2 + b2. Where a2 is the air flow rate entering the auxiliary air duct b through the first air inlet 111, and b2 is the air flow rate entering the auxiliary air duct b through the second air inlet 112. Since the air flow rate entering the auxiliary air duct b from the first air inlet 111 decreases, that is, a 2 < a 1 , under the influence of the negative pressure in the main air duct a, the air flow rate entering the auxiliary air duct b through the second air inlet 112 will increase, so b2 > b1. Therefore, S2 ≤ S1, and (S1 - S2) < (a1 - a2). In other words, when the first air inlet 111 is blocked and the air flow rate decreases, the air flow rate from the second air inlet 112 increases, making the reduced air flow rate in the auxiliary air duct b less than the reduced air flow rate of the first air inlet 111, thereby slowing down the loss of the heat dissipation efficiency of the auxiliary air duct b for the radiation component 13 due to the blockage of the first air inlet 111.

[0036] Similarly, when the second air inlet 112 is blocked, the air flow rate entering through the first air inlet 112 will also increase accordingly. The specific process can also be referred to the above.

[0037] During use of the drying equipment 10 in the above embodiment, when one of the first air inlet 111 and the second air inlet 112 is blocked, resulting in a decrease in the air intake volume, the auxiliary air duct b can inhale more airflow from the other to compensate for the reduced airflow flow due to the blockage, so that the airflow in the auxiliary air duct b can maintain a dynamic balance and meet the heat dissipation efficiency of the radiation component 13.

[0038] For example, when a user uses the drying device 10, the following situations may occur:

[0039] (1) The user misoperates the drying device 10, causing a foreign object to block one of the first air inlet 111 and the second air inlet 112. For example, when holding the drying device 10, the palm of the hand is located at the first air inlet 111 to block it. Alternatively, when using the drying device 10, items such as cloth and hair are sucked tightly against the first air inlet 111 by negative pressure to block it. In such working conditions, if the auxiliary air duct b only takes in air from the first air inlet 111, the air flow rate inside it will drop rapidly, and the radiation component 13 will not be able to dissipate heat effectively and will heat up quickly, causing the risk of overheating. However, when using the drying device 10 in the embodiment of the present application, after the first air inlet 111 is blocked, the air flow rate entering the auxiliary air duct b from the second air inlet 112 will immediately increase, which can continue to maintain effective heat dissipation of the radiation component 13 and avoid the risk of overheating.

[0040] (2) When the user uses the drying device 10 for a long time, more and more foreign matter will be blocked on the first air inlet 111, causing its air flow rate to gradually decrease. When the blockage degree of the first air inlet 111 of the drying device 10 is low, it is difficult for the user to perceive the change in the air flow rate output by the drying device 10, and the user will not actively clean the first air inlet 111. If the auxiliary air duct b only takes in air from the first air inlet 111, this situation may have affected the heat dissipation efficiency of the radiation component 13, which will not only accelerate the life loss rate of the radiation component 13, but will also eventually cause the risk of overheating. In the drying device 10 in the embodiment of the present application, when the blockage degree of the first air inlet 111 gradually increases due to the accumulation of debris, the air flow rate of the second air inlet 112 entering the auxiliary air duct b also gradually increases, thereby maintaining a dynamic balance of the air flow rate in the auxiliary air duct b, and being able to continue to maintain effective heat dissipation of the radiation component 13 during the long-term use of the drying device 10 by the user, thereby extending the service life of the radiation component 13 and the drying device 10.

[0041] In some embodiments, as shown in FIG1 , the housing 11 includes a main body 114 and a handle 115. The main body 114 has an air outlet 116 and a first air inlet 111. The main air duct a and at least a portion of the auxiliary air duct b are located within the main body 114. The wind assembly 12 and the radiation assembly 13 are disposed within the main body 114. The handle 115 has a second air inlet 112 and is mounted to the main body 114. The handle 115 is designed to allow a user to hand-operate the entire drying device 10.

[0042] The handle 115 and the main body 114 are two independent parts. The first air inlet 111 is located on the main body 114, and the second air inlet 112 is located on the handle 115. This allows the first and second air inlets 111, 112 to be relatively far apart in space, making them less likely to be blocked or obstructed at the same time. Furthermore, when one of the first and second air inlets 111, 112 draws air from the outside, it does not affect the other.

[0043] In some embodiments shown in Figures 2 and 3, a first sub-duct c1, a second sub-duct c2, and a first heating structure 161 are provided within the handle 115. The upstream portion of the first sub-duct c1 communicates with the second air inlet 112, and the downstream portion communicates with the upstream portion of the auxiliary air duct b. The upstream portion of the second sub-duct c2 communicates with the second air inlet 112, and the downstream portion communicates with the upstream portion of the main air duct a. The first heating structure 161 is at least partially located within the second sub-duct c2.

[0044] Part of the air entering the handle 115 from the second air inlet 112 flows along the first sub-air duct c1, flows out of the first sub-air duct c1 and merges into the auxiliary air duct b, constituting the airflow from the second air inlet 112 in the auxiliary air duct b; the other part flows along the second sub-air duct c2, passes through the first heating structure 161 during the flow process and dissipates heat, and flows out of the second sub-air duct c2 and merges into the upstream of the main air duct a.

[0045] The difference between the first sub-duct c1 and the second sub-duct c2 is:

[0046] (1) The air flow rates are different. The air flow in the first sub-duct c1 does not flow through the first heating structure 161, while the air flow in the second sub-duct c2 flows through the first heating structure 161. Therefore, the wind resistance in the first sub-duct c1 is smaller than the wind resistance in the second sub-duct c2. Accordingly, the air flow rate in the first sub-duct c1 is greater than the air flow rate in the second sub-duct c2. In other words, most of the air entering the handle 115 from the second sub-duct c2 flows along the first sub-duct c1 into the auxiliary duct b for dissipating heat to the radiation component 13; a small part flows along the second sub-duct c2 for dissipating heat to the first heating structure 161. When the first air inlet 111 is blocked, the air flow can smoothly pass through the first sub-duct c1 with smaller wind resistance to supplement the air flow rate in the auxiliary duct b, thereby maintaining the heat dissipation efficiency of the radiation component 13.

[0047] (2) The air flow temperature is different. The air flow in the second sub-duct c2 is heated by the first heating structure 161 after passing through it, so the air flow temperature in the second sub-duct c2 is higher than the air flow temperature in the first sub-duct c1. If the air flow in the second sub-duct c2 is merged into the auxiliary duct b, the air flow temperature in the auxiliary duct b will rise. Temperature difference is one of the main factors affecting heat dissipation efficiency. After the temperature of the air flow in the auxiliary duct b rises, the temperature difference between it and the radiation component 13 will decrease, which will reduce the heat dissipation efficiency of the radiation component 13. Therefore, the air flow of the first sub-duct c1 in the handle 115 is merged into the auxiliary duct b, and the air flow in the second sub-duct c2 is merged into the main duct a, which can not only dissipate heat for the first heating structure 161 in the handle 115, but also avoid the decrease in heat dissipation efficiency of the radiation component 13 after the air flow is heated.

[0048] (3) Different internal negative pressures. Since the wind resistance in the first sub-duct c1 is smaller than that in the second sub-duct c2, if the two are subjected to the same negative pressure, almost all the airflow entering from the second air inlet 112 will enter the first sub-duct c1, and there will only be a weak airflow in the second sub-duct c2, making it difficult to effectively dissipate heat from the first heating structure 161. To this end, the first sub-duct c1 is connected to the auxiliary duct b downstream, and the second sub-duct c2 is connected to the main duct a downstream. The negative pressure applied by the main duct a is greater than that of the auxiliary duct b, so that the negative pressure of the second sub-duct c2 is greater than the negative pressure of the first sub-duct c1, thereby ensuring that there is sufficient airflow in the second sub-duct c2 to meet the heat dissipation requirements of the first heating structure 161.

[0049] As shown in Figures 2 and 3, in some more specific embodiments, the drying device 10 further includes a substrate 1151, at least a portion of which is located within the handle 115. The first sub-duct c1 and the second sub-duct c2 are located on either side of the substrate 1151. A plurality of electronic components are disposed on the side of the substrate 1151 facing the second sub-duct c2, forming a first heating structure 161.

[0050] When the drying device 10 is in operation, a plurality of electronic components consume electricity and generate heat. These electronic components are arranged in the second sub-air duct c2, and the heat is dissipated by the airflow in the second sub-air duct c2. In addition, the substrate 1151 is a plate-like structure, which itself divides the handle 115 into a first sub-air duct c1 and a second sub-air duct c2. The first sub-air duct c1 flows along the side of the substrate 1151 where no electronic components are arranged, and has a lower wind resistance. In some more specific embodiments, part of the heat of the plurality of electrical components is transferred to the substrate 1151, and the airflow in the first sub-air duct c1 dissipates heat to the substrate 1151, thereby indirectly assisting in dissipating heat to the plurality of electronic components (i.e., the first heating structure 161).

[0051] In a more specific embodiment, the substrate 1151 is a structure such as a printed circuit board (PCB) or a flexible circuit board, and multiple electronic components are installed on the substrate 1151 in an integrated or welded manner to constitute at least part of the control circuit and / or power supply circuit of the drying device 10.

[0052] In other specific embodiments, the substrate 1151 is the mainboard of the battery management system (BMS), which can provide functions such as power supply, communication, and charge and discharge management. A battery module is connected and installed on the substrate 1151. The battery module includes one or more battery cells. The battery module and / or related components on the substrate 1151 constitute a first heating structure 161. The battery module of the drying device 10 can store electricity for unlimited use. The battery module may generate heat during the charging or discharging process, and the airflow in the second sub-duct c2 is used to dissipate heat from the battery module (i.e., the first heating structure 161) and / or the substrate 1151.

[0053] As shown in Figures 2 and 3, in some specific embodiments, the plane on which the substrate 1151 is located is perpendicular to the airflow direction of the main air duct a. The first sub-air duct c1 and the second sub-air duct c2 formed on either side of the substrate 1151 are arranged side by side relative to the airflow of the main air duct a. In other embodiments, the plane on which the substrate 1151 is located may also be parallel to the airflow direction of the main air duct a, or at a certain angle thereto.

[0054] In other embodiments not shown, the handle 115 has two relatively independent chambers, forming a first sub-duct c1 and a second sub-duct c2, respectively. The first heating structure 161 and / or the aforementioned substrate 1151 are installed in the chamber corresponding to the second sub-duct c2. This prevents the airflow in the first sub-duct c1 from coming into contact with the substrate 1151 and allows it to flow into the auxiliary duct b at a temperature similar to that at which it enters the handle 115.

[0055] In some embodiments as shown in Figures 2 and 3, a portion of the substrate 1151 is located in the handle 115, and the other portion extends into the main body 114. Since the auxiliary air duct b and the main air duct a are both in the main body 114, the flow direction of the first sub-air duct c1 and the second sub-air duct c2 is from the handle 115 to the main body 114. In the process of the airflow in the first sub-air duct c1 and the second sub-air duct c2 flowing out of the handle 115 and entering the main body 114, they are guided by the substrate 1151 extending into the main body 114, so that the two enter the main body 114 along a preset flow direction, and remain relatively separated after entering the main body 114. In other embodiments, the substrate 1151 can also be located entirely in the handle 115, then the airflow in the first sub-air duct c1 and the second sub-air duct c2 will mix after entering the main body 114, and will flow to the auxiliary air duct b and the main air duct a respectively under the influence of negative pressure. In other embodiments, the substrate 1151 is entirely located in the handle 115, and a related guiding structure is provided at a corresponding position in the main body 114, so that the airflows in the first sub-duct c1 and the second sub-duct c2 remain relatively separated after entering the main body 114 and flow along a preset direction.

[0056] In some embodiments, as shown in Figures 2 and 3, the second sub-duct c2 and the first sub-duct c1 are arranged side by side along the airflow direction of the main air duct a. The second sub-duct c2 is located closer to the first air inlet 111. The airflow from the second sub-duct c2 flows toward the vicinity of the first air inlet 111 and ultimately merges into the main air duct a. The first sub-duct c1 is located closer to the radiation assembly 13. The airflow from the first sub-duct c1 directly enters the auxiliary air duct b to dissipate heat from the radiation assembly 13.

[0057] In some embodiments, as shown in FIG4 , the drying apparatus 10 further includes an air guide structure 17 disposed within the first air inlet 111. The air guide structure 17 forms a first ventilation portion 171 and a second ventilation portion 172. The upstream portion of the main air duct a communicates with the first air inlet 111 via the first ventilation portion 171, and the upstream portion of the auxiliary air duct b communicates with the first air inlet 111 via the second ventilation portion 172. The airflow entering the housing 11 from the first air inlet 111 is divided into two portions at the air guide structure 17: one portion flows along the first ventilation portion 171 into the upstream portion of the main air duct a, and the other portion flows along the second ventilation portion 172 into the upstream portion of the auxiliary air duct b.

[0058] Since the negative pressure in the main air duct a is relatively large, and the negative pressure in the auxiliary air duct b is relatively small, if the upstream of both are directly connected to the first air inlet 111, most of the airflow will be sucked into the main air duct a, and only a weak airflow will flow into the auxiliary air duct b, which is difficult to meet the heat dissipation needs of the radiation component 13. After the air guide structure 17 is provided at the first air inlet 111, the airflow flowing into the air guide structure 17 is divided into two, passing through the air guide structure 17 from the first ventilation part 171 and the second ventilation part 172 to enter the corresponding air duct, which can avoid too little airflow in the auxiliary air duct b. Moreover, by adjusting the areas of the first ventilation part 171 and the second ventilation part 172, the airflow rate flowing into the main air duct a and the auxiliary air duct b can be controlled, so that the airflow rate in the auxiliary air duct b meets the heat dissipation needs of the radiation component 13.

[0059] In some embodiments, the air guide structure 17 is formed with a complete first ventilation portion 171 and a second ventilation portion 172. In other embodiments, at least one of the first ventilation portion 171 and the second ventilation portion 172 is formed by the air guide structure 17 and another structure (e.g., the housing 11 or a structure installed in the housing 11).

[0060] As shown in Figure 4 , during operation, the wind power assembly 12 within the drying apparatus 10 generates a negative pressure, creating the highest negative pressure region within the entire drying apparatus 10. Air outside the drying apparatus 10 is able to flow freely, and its negative pressure can be considered zero. Consequently, the air outside the drying apparatus 10 is affected by the negative pressure and flows through the first and second air inlets 111, 112, along a predetermined path within the housing 11, toward the wind power assembly 12.

[0061] Specifically, when the wind assembly 12 is operating, the housing 11 forms a first region p1, a second region p2, a third region p3, and a fourth region p4, where the negative pressure decreases sequentially. It should be noted that the aforementioned four regions are merely used to facilitate description of the airflow within the housing 11 and are not limited to these four regions. Furthermore, for ease of understanding, the regions are enclosed in dashed boxes in the diagrams. However, the dashed boxes do not define the boundaries of the regions, and the regions themselves may not have specific, clear boundaries.

[0062] The first area p1 is located between the wind guide structure 17 and the wind assembly 12. The wind assembly 12 directly forms negative pressure in the first area p1, so the first area p1 has the highest negative pressure among the four areas, and the airflow in other areas tends to flow toward the first area p1.

[0063] The second region p2 is adjacent to the radiation element 13 and is connected to the first region p1, the third region p3, and the fourth region p4. Due to the negative pressure in the first region p1, the second region p2 forms a lower negative pressure than the first region p1, and the airflow in the second region p2 tends to flow toward the first region p1.

[0064] The third region p3 is adjacent to and connected to the first air inlet 111. The third region p3 is connected to the first region p1 via the first ventilation portion 171 and to the second region p2 via the second ventilation portion 172. The airflow within the third region p3 tends to flow toward the first region p1 and the second region p2.

[0065] The fourth region p4 is adjacent to and connected to the second air inlet 112 .

[0066] The third and fourth regions p3 and p4 are each connected to an external environment with a negative pressure of zero, forming the two regions with the lowest negative pressure. Since the third region p3 is directly connected to the first region p1 via the first vent 171, and the fourth region p4 is indirectly connected to the first region p1 via the second region p2, the airflow path from the third region p3 to the first region p1 is shorter, while the airflow path from the fourth region p4 to the first region p1 is longer. Consequently, the negative pressure in the third region p3 is greater than that in the fourth region p4.

[0067] When the first air inlet 111 and the second air inlet 112 are completely unobstructed, the airflow direction in the housing 11 is roughly as follows:

[0068] (1) The airflow from the first air inlet 111 enters the third area p3 and is divided into two parts:

[0069] The first portion flows into the first area p1 through the first ventilation portion 171, passes through the wind assembly 12, and then flows along the main air duct a to exit the drying apparatus 10. (All airflow after entering the first area p1 follows this path, which will not be repeated later.) This portion of airflow constitutes the primary airflow in the main air duct a (the airflow in the auxiliary air duct b constitutes the secondary airflow in the main air duct a). Its flow path is the shortest, the airflow volume is the largest, and the wind noise is minimized, ensuring that the airflow output from the main air duct a is smooth, low-noise, and high-speed.

[0070] The second portion of airflow flows through the second ventilation portion 172 into the second area p2. As it flows along the auxiliary air duct b, it exchanges heat with the radiating assembly 13. After exiting the auxiliary air duct b, it rejoins the first area p1. This portion of airflow constitutes the primary airflow in the auxiliary air duct b and is the primary source of heat dissipation for the radiating assembly 13.

[0071] (2) The airflow from the second air inlet 112 enters the fourth area p4, flows to the second area p2, and then flows along the auxiliary air duct b. When both the first air inlet 111 and the second air inlet 112 are completely unobstructed, the airflow in this portion of the airflow is relatively small due to its longer flow path. This constitutes the secondary airflow in the auxiliary air duct b and also dissipates heat from the radiating element 13.

[0072] When the first air inlet 111 is blocked and the second air inlet 112 is unobstructed, the airflow in the auxiliary air duct a roughly changes as follows:

[0073] The overall air flow rate in the third area p3 decreases, and the air flow rate from the third area p3 into the first area p1 and the second area p2 decreases, which causes the negative pressure in the first area p1 to increase, and then causes the negative pressure in the second area p2 and the fourth area p4 to increase accordingly. The air flow rate inhaled by the fourth area p4 from the second air inlet 112 increases, and the air flow rate flowing from the fourth area p4 to the second area p2 also increases, which makes up for the reduced part of the air flow from the third area p3 in the auxiliary air duct b, thereby maintaining the heat dissipation effect on the radiation component 13.

[0074] Similarly, when the second air inlet 112 is blocked, the airflow from the third region p3 to the second region p2 increases, maintaining the air volume in the auxiliary air duct b. This ensures that the airflow in the second region p2 is in a state of dynamic equilibrium, consistently meeting the heat dissipation requirements of the radiating component 13.

[0075] In some embodiments, the airflow in the fourth area p4 all enters the second area p2, that is, the air entering from the second air inlet 112 all flows into the auxiliary air duct b.

[0076] In other embodiments, a portion of the airflow from the fourth region p4 flows toward the second region p2, while another portion of the airflow passes through the second ventilation portion 172 and merges into the third region p3, thereby becoming part of the airflow within the third region p3. The airflow direction within the third region p3 is similar to the process described above. In other words, the air entering through the second air inlet 112 is partially merged into the auxiliary air duct b, and partially merged into the main air duct a.

[0077] As shown in Figure 5, in some more specific embodiments, the fourth area p4 is further provided with a first heating structure 161. The distance between the first heating structure 161 and the third area p3 is smaller than the distance between the first heating structure 161 and the second area p2. When the airflow flows through the fourth area p4, since the position of the first heating structure 161 is closer to the third area p3, the airflow flowing from the fourth area p4 to the third area p3 will flow through the first heating structure 161 to dissipate heat. The airflow flowing from the fourth area p4 to the second area p2 hardly flows through the first heating structure 161, maintains a normal temperature state and merges into the auxiliary air duct b. For relevant content on heat dissipation of the first heating structure 161, please refer to the above description.

[0078] In some embodiments, as shown in FIG4 , a guide sleeve 18 is provided within the housing 11, with the wind assembly 12 positioned within the guide sleeve 18. A first interstitial air duct 181 is formed between the wind assembly 12 and the guide sleeve 18, allowing airflow to flow through. The first region p1 and the second region p2 are connected via the first interstitial air duct 181. A second interstitial air duct 182 is formed between the guide sleeve 18 and the housing 11, allowing airflow to flow through. One end of the second interstitial air duct 182 communicates with the second region p2, the other end communicates with the third region p3 via the second ventilation portion 172, and the middle portion communicates with the fourth region p4.

[0079] The aforementioned first gap air duct 181 and second gap air duct 182 are not limited to air ducts with specific shapes and boundaries formed by related structures. They can also be formed by multiple discrete gaps reserved in multiple related structures. Based on the negative pressure relationship between the aforementioned areas, as long as airflow can be generated between the related areas, the first gap air duct 181 and the second gap air duct 182 are formed.

[0080] In some more specific embodiments, one end of the air guide sleeve 18 is mounted to the air guide structure 17 to form a seal, isolating the first gap air duct 181 from the second gap air duct 182 at the seal. The other end of the air guide sleeve 18 is mounted to the radiation assembly 13, forming at least a portion of the second region p2 at the mounting location. The first gap air duct 181 and the second gap air duct 182 are connected through the second region p2.

[0081] Accordingly, the airflow in auxiliary air duct b flows as follows: first through second gap air duct 182, into second region p2, where it dissipates heat from radiating element 13, and then through first gap air duct 181 into first region p1. The airflow in second gap air duct 182 is at room temperature and also dissipates heat from housing 11.

[0082] In some embodiments, as shown in FIG4 , the air guide structure 17 is provided with a mounting portion (not shown) for mounting to the air guide sleeve 18 . The air guide sleeve 18 itself is mounted directly or indirectly to the housing 11 , and the air guide structure 17 is mounted to the air guide sleeve 18 , thereby being indirectly mounted within the housing 11 . In the radial direction of the air guide structure 17 , the second ventilation portion 172 is located outside the mounting portion, and the first ventilation portion 171 is located inside the mounting portion. The first ventilation portion 171 and the second ventilation portion 172 may be a plurality of through holes, a grille structure, a hollow structure, etc., provided at corresponding positions on the air guide structure 17 .

[0083] Because the second ventilation portion 172 is located outside the mounting portion, the airflow passing through the second ventilation portion 172 flows along the outer wall of the air guide sleeve 18 (i.e., along the second gap air duct 182). Similarly, the first ventilation portion 171 is located inside the mounting portion, and the airflow passing through the first ventilation portion 171 flows along the inner wall of the air guide sleeve 18 (i.e., along the first gap air duct 181).

[0084] In other embodiments not shown, the outer edge of the air guide structure 17 forms a mounting portion, which is used to be mounted to the housing 11, and at least a portion of the second ventilation portion 172 is formed on the mounting portion. In other words, the air guide structure 17 is not mounted with the air guide sleeve 18, but is directly mounted within the housing 11. The airflow passing through the second ventilation portion 172 flows along the inner wall of the housing 11 (i.e., flows along the second gap air duct 182). The second ventilation portion 172 can be a plurality of through holes, a grille structure, a hollow structure, etc., provided on the mounting portion.

[0085] In some embodiments as shown in FIG6 , the gap between the outer edge of the air guide structure 17 and the housing 11 constitutes a second ventilation portion 172. That is, the air guide structure 17 forms a portion of the second ventilation portion 172, and the housing 11 forms another portion of the second ventilation portion 172. Therefore, the area of ​​the air guide structure 17 corresponding to the second ventilation portion 172 does not have any through holes, grille structures, or hollow structures.

[0086] In some embodiments as shown in FIG4 , the second ventilation portion 172 is disposed around the outside of the first ventilation portion 171. Since the wind assembly 12 is disposed on the axis of the housing 11, disposing the first ventilation portion 171 radially inside the air guide structure 17 can reduce the length of the flow path of the airflow passing through the first ventilation portion 171 into the main air duct a, thereby maximizing the air volume and wind speed in the main air duct a.

[0087] In some specific embodiments, the first ventilation portion 171 is circular or annular, and the second ventilation portion 172 is annular and coincides with the geometric center of the first ventilation portion 171. The geometric centers of the two are approximately located on the axis of the housing 11. When the wind assembly 12 is in operation, a negative pressure area is formed on the axis of the housing 11, so that the main air duct a and the auxiliary air duct b can form a uniform and smooth airflow in the radial direction.

[0088] In some embodiments, as shown in FIG4 , the air guide structure 17 further includes an air guide portion 173 connected between the first ventilation portion 171 and the second ventilation portion 172. The airflow flowing into the air guide structure 17 can be roughly divided into three parts: a first part located in the first ventilation portion 171 and capable of directly passing through the first ventilation portion 171; a second part located in the second ventilation portion 172 and capable of directly passing through the second ventilation portion 172; and a third part located in the air guide portion 173, flowing along the air guide portion 173 and being directed to either the first ventilation portion 171 or the second ventilation portion 172.

[0089] In some more specific embodiments, the first ventilation portion 171, the air guide portion 173, and the second ventilation portion 172 are all annular and arranged one above the other. Airflow flowing into the air guide portion 173 can be directed to the second ventilation portion 172 on its outer edge, or to the first ventilation portion 171 on its inner edge. Airflow flowing into both the first and second ventilation portions 171, 172, flows into the corresponding air ducts in an annular and radially uniform manner.

[0090] In some more specific embodiments, the air guide portion 173 is arranged at an angle relative to the direction of airflow in the main air duct a. Airflow drawn through the first air inlet 111 by the negative pressure in the main air duct a flows in the direction of the main air duct a. Once it reaches the air guide portion 173, it is directed and redirected toward the first ventilation portion 171 or the second ventilation portion 172. Because the air guide portion 173 is angled, rather than perpendicular to the airflow, it reduces wind noise and turbulence during the airflow guidance process, resulting in smoother airflow.

[0091] In some embodiments, as shown in FIG4 , the air guide structure 17 has an inclined sidewall that is tilted relative to the airflow direction of the main air duct a, and the air guide portion 173 and the first ventilation portion 171 are both formed on the inclined sidewall. That is, the air guide portion 173 and the first ventilation portion 171 are both tilted to accommodate airflow directed toward the main air duct a.

[0092] In some more specific embodiments, the first ventilation portion 171 includes a plurality of ventilation holes, and the axes of at least some of the ventilation holes are arranged at an angle relative to the airflow direction of the main air duct a. In other specific embodiments, the first ventilation portion 171 includes a hollow structure, and the side walls of the hollow structure are arranged at an angle relative to the airflow direction of the main air duct a.

[0093] In some more specific embodiments, the plurality of ventilation holes are distributed in a ring shape, with the axes of at least some of the ventilation holes intersecting with the wind assembly 12. As air passes through each ventilation hole, it flows along its inclined axis, which guides and converges the airflow radially toward the wind assembly 12, allowing the airflow in the area to smoothly enter the main air duct a, maintaining low wind noise and wind resistance.

[0094] In some more specific embodiments, the first ventilation portion 171 includes a grille structure comprising a plurality of support bars extending radially and / or circumferentially along the air guide structure 17. Each support bar forms an inclined surface with low wind resistance toward the first air inlet 111. The plurality of support bars together form a plurality of ventilation holes. Because each support bar has a low wind resistance inclined surface, airflow through the first ventilation portion 171 experiences minimal wind resistance, resulting in minimal wind noise.

[0095] In some specific embodiments, the middle portion of the air guide structure 17 bulges away from the wind assembly 12 and forms a concave cavity on the side facing the wind assembly 12. This concave cavity forms at least a portion of the boundary of the first region p1. As previously mentioned, the airflow from the auxiliary air duct b flows into the first region p1, that is, into the concave cavity of the air guide structure 17, where it mixes with the airflow from the first ventilation portion 171 before entering the main air duct a.

[0096] In some more specific embodiments, the air guide structure 17 is shaped like a truncated pyramid, a frustum, a pyramid, or a cone, with a larger base, a smaller top, and inclined sidewalls. The sidewalls are formed with the aforementioned first ventilation portion 171 and air guide portion 173, which allow for air intake and guidance in an inclined manner. The relevant technical effects can be seen above. The base faces the wind assembly 12, and the top faces the first air inlet 111, allowing airflow to enter the wind assembly 12 along the inclined sidewalls.

[0097] In some more specific embodiments, the first air inlet 111 is annular. On any plane perpendicular to the airflow direction of the main air duct a, the first ventilation portion 171, the first air inlet 111, and the second ventilation portion 172 are projected to form a circle or ring that is nested in sequence from small to large.

[0098] 6 and 7 , the airflow entering the first air inlet 111 along the axial direction can be roughly divided into airflow d1 , airflow d2 and airflow d3 .

[0099] Airflow d3 passes through the central region of the first air inlet 111 and flows directly to the air guide 173, where it is directed to the first ventilation portion 171 or the second ventilation portion 172. Because airflow d3 does not directly flow through the edge of the first air inlet 111, the overall wind resistance is low, and it constitutes the majority of the airflow passing through the first air inlet 111.

[0100] With respect to airflow d1, because the projected shape of the first air inlet 111 is larger than the first ventilation portion 171 and nestles around the outer edge of the first ventilation portion 171, airflow d1 cannot pass directly through the first air inlet 111 in a straight path along the axis and into the first ventilation portion 171. This arrangement is because, since the first ventilation portion 171 connects to the first region p1, where the negative pressure is highest, if the first ventilation portion 171 were able to form a straight path with the air in the external environment, the airflow would flow at a high velocity along the edge of the first air inlet 111, generating significant wind noise. In the embodiment shown in FIG7 , the edge of the first air inlet 111 overlaps the first ventilation portion 171 along the axis, causing airflow d1 to flow in a zigzag path, thereby reducing wind noise as it passes along the edge of the first air inlet 111. It should be noted that there is no actual boundary between airflow d1 and airflow d3. As described above, both airflows d1 and d3 are designed to slow down the wind speed, thereby reducing wind noise as they pass through the first air inlet 111.

[0101] The negative pressure in the second area p2 is smaller than that in the first area p1. On the one hand, the air flow velocity entering the second ventilation part 172 is itself small and there is no need to consider wind noise. On the other hand, it is necessary to increase the air flow rate of the second ventilation part 172 as much as possible to meet the heat dissipation needs of the radiation component 13. Therefore, the radial dimension of the first air inlet 111 is designed to be smaller than the second ventilation part 172, so that the airflow d2 can directly pass through the first air inlet 111 along a straight path and enter the second ventilation part 172.

[0102] As shown in FIG4 , in some specific embodiments, the drying apparatus 10 further includes a baffle 113 mounted on the housing 11 and / or the air guide structure 17. An annular first air inlet 111 is formed between the edge of the baffle 113 and the housing 11 to accommodate the aforementioned annular first ventilation portion 171 and second ventilation portion 172, thereby achieving uniform air intake. The edge of the baffle 113 can be further designed to have a circular arc, an inclined shape, or other shapes to reduce wind noise.

[0103] As shown in FIG5 , in some embodiments, the drying device 10 includes a first heating structure 161 and a second heating structure 162. Airflow entering the housing 11 through the second air inlet 112 at least partially dissipates heat with the first heating structure 161. Airflow in the main air duct a dissipates heat with the second heating structure 162.

[0104] The heat generated by the second heating structure 162, the radiation assembly 13, and the first heating structure 161 decreases in sequence during operation, and the airflow required to dissipate heat from the three also decreases in sequence. Therefore, the drying device 10 uses three air ducts with decreasing flow rates to dissipate heat from these three structures, while minimizing the impact on wind noise, wind speed, and smoothness of the corresponding airflow while meeting the heat dissipation needs of each structure. Specifically:

[0105] The air flow rate of the main air duct a is the largest, corresponding to the second heating structure 162 with the largest heat generation; the air flow rate of the auxiliary air duct b is medium, corresponding to the radiation component 13 with a medium heat generation; the air flow entering the shell 11 from the second air inlet 112 is part of the air flow in the auxiliary air duct b, so the air flow rate of this part is the smallest, corresponding to the first heating structure 161 with the smallest heat generation.

[0106] Referring to FIG. 2 , in some embodiments, the airflow in the main air duct a flows through at least a portion of the radiation assembly 13 and exchanges heat with the radiation assembly 13. For example, when the heat generated by the radiation assembly 13 is large and the airflow in the auxiliary air duct b is insufficient to dissipate the heat, the airflow in the main air duct a dissipates the heat from the radiation assembly 13, maintaining it within a suitable temperature range. In addition, when the second heating structure 162 is in operation, the heat it emits may heat the radiation assembly 13. The airflow in the main air duct a simultaneously absorbs the heat from the second heating structure 162 and the radiation assembly 13, thereby increasing the temperature of the airflow and preventing the radiation assembly 13 from absorbing heat from the second heating structure 162 and heating up.

[0107] In other embodiments not shown, the airflow in the main air duct a does not flow directly through the radiation component 13, but is isolated between the main air duct a and the radiation component 13, thereby avoiding the effects of wind resistance, wind noise, etc. when the airflow in the main air duct a flows through the radiation component 13. Furthermore, the structure that isolates the main air duct a from the radiation component 13 can have a higher thermal conductivity, and the airflow in the main air duct a can still exchange heat with the radiation component 13, achieving the aforementioned functions of dissipating heat from the radiation component 13 and preventing the radiation component 13 from absorbing heat from the second heating structure 162. In addition, the structure that isolates the main air duct a from the radiation component 13 can have a lower thermal conductivity, and the airflow in the main air duct a does not exchange heat with the radiation component 13, which can avoid the airflow in the main air duct a from heating the radiation component 13 after being heated by the second heating structure 162. In some embodiments, the auxiliary air duct b is able to keep the radiation component 13 within a suitable temperature range. Since the air flow rate and flow velocity in the main air duct a are large, if the main air duct a also exchanges heat with the radiation component 13, the radiation component 13 may be lower than its temperature range. This problem can be avoided by using a structure with lower thermal conductivity to isolate the radiation component 13 from the main air duct a.

[0108] As shown in FIG2 , in some more specific embodiments, a first sub-duct c1 and a second sub-duct c2 are further provided within the housing 11. The upstream portions of the first sub-duct c1 and the second sub-duct c2 are both connected to the second air inlet 112. The airflow in the first sub-duct c flows into the auxiliary duct b to dissipate heat from the radiation assembly 13, and then flows into the main duct a to dissipate heat from the second heating structure 162. The airflow in the second sub-duct c2 dissipates heat from the first heating structure 161, and then flows into the main duct a to dissipate heat from the second heating structure 162.

[0109] According to the first law of thermodynamics, after the airflow in the first sub-duct c1 passes through the first heating structure 161, its temperature must be lower than that of the first heating structure 161. This allows the airflow to dissipate heat to the radiation component 13. Similarly, the airflow passing through the radiation component 13 also has a lower temperature than that of the radiation component 13, allowing the airflow to dissipate heat to the second heating structure 162.

[0110] For the description of the first sub-duct c1 and the second sub-duct c2, please refer to the records in other parts of the above text.

[0111] In some more specific embodiments, the second heating structure 162 is a structure such as a resistance wire or a ceramic heating element. Its primary function is to convert current into thermal energy, thereby heating the airflow formed within the drying device 10, enabling the drying device 10 to output a hot airflow and accelerate the evaporation of moisture. In other words, the purpose of heat exchange when the airflow flows through the first heating structure 161 and the radiation component 13 is to dissipate heat, thereby lowering the temperature of the first heating structure 161 and the radiation component 13; while the purpose of heat exchange when the airflow flows through the second heating structure 162 is to absorb heat, thereby raising the temperature of the airflow itself.

[0112] As can be seen from the foregoing, among all the air flows flowing into the main air duct a, there is a portion of the air flow heated by the first heating structure 161, and there is also a portion of the air flow heated by the radiation component 13, which is equivalent to preheating the air flow of the main air duct a with the help of the first heating structure 161 and the radiation component 13. Based on this, the second heating structure 162 consumes less energy to heat the air flow of the main air duct a to a preset temperature; or, under the premise of the same energy consumption, the second heating structure 162 can heat the air flow of the main air duct a to a higher temperature. In addition, in some embodiments, the second heating structure 162 itself can be turned on or off, corresponding to the hot air shield and the cold air shield of the drying device 10, respectively. In the cold air shield of the drying device 10, the first heating structure 161 and the radiation component 13 can also slightly increase the temperature of the air flow to prevent the user from feeling the cold air flow.

[0113] In some embodiments as shown in FIG1 , when the drying apparatus 10 is in operation, the airflow path from the first air inlet 111 to the main air duct a is smaller than the airflow path from the second air inlet 112 to the main air duct a; and / or the overall wind resistance from the first air inlet 111 to the main air duct a is smaller than the overall wind resistance from the second air inlet 112 to the main air duct a. Thus, the airflow entering from the first air inlet 111 is larger, forming the primary airflow in the main air duct a; while the airflow entering from the second air inlet 112 is smaller, forming a secondary airflow in the main air duct a.

[0114] In some more specific embodiments, a first filter assembly (not shown) is detachably mounted at the first air inlet 111 , and a second filter assembly (not shown) is detachably mounted at the second air inlet 112 .

[0115] The first and second filter assemblies each filter the airflow drawn into the housing 11. During use, dust, hair, and the like may accumulate in either the first or second filter assembly, causing varying degrees of blockage. Even if the user fails to promptly clear either filter assembly when it becomes clogged, the drying apparatus 10 can still ensure sufficient airflow to dissipate heat from the radiation assembly 13, as described above.

[0116] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are mutually inconsistent.

[0117] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A drying device, characterized in that, It includes a housing which has an independent first air inlet, a second air inlet and an air outlet. Inside the housing, there are provided: A main air duct, the upstream of which is communicated with the first air inlet, and the downstream of which is communicated with the air outlet; An auxiliary air duct, the upstream of which is communicated with the first air inlet and the second air inlet, and the downstream of which is communicated with the main air duct; A wind power component, installed in the main air duct for generating air flow; A radiation component, at least part of which is located in the auxiliary air duct for generating infrared radiation.

2. The drying device according to claim 1, characterized in that, The housing includes: A main body, which has the air outlet and the first air inlet, and the main air duct and at least part of the auxiliary air duct are located inside the main body; A handle, which has the second air inlet, and the handle is installed on the main body.

3. The drying device according to claim 2, characterized in that, The handle is provided with: A first sub-air duct, the upstream of which is communicated with the second air inlet, and the downstream of which is communicated with the upstream of the auxiliary air duct; A second sub-air duct, the upstream of which is communicated with the second air inlet, and the downstream of which is communicated with the upstream of the main air duct; A first heating structure, at least part of which is located in the second sub-air duct.

4. The drying device according to claim 3, characterized in that, It further includes a substrate, at least part of which is located inside the handle. The first sub-air duct and the second sub-air duct are respectively located on both sides of the substrate. A plurality of electronic components are provided on one side of the substrate facing the second sub-air duct, and the plurality of electronic components constitute the first heating structure.

5. The drying device according to claim 4, characterized in that, The plane where the substrate is located is perpendicular to the air flow direction of the main air duct.

6. The drying device according to claim 4, characterized in that, A part of the substrate is located in the handle, and another part extends into the main body.

7. The drying device according to any one of claims 3 to 6, characterized in that, Along the air flow direction of the main air duct, the second sub-air duct and the first sub-air duct are arranged side by side.

8. The drying device according to claim 1, characterized in that, It further includes a wind guiding structure arranged inside the first air inlet. The wind guiding structure forms at least part of a first ventilation part and at least part of a second ventilation part; the upstream of the main air duct is communicated with the first air inlet through the first ventilation part, and the upstream of the auxiliary air duct is communicated with the first air inlet through the second ventilation part.

9. The drying device according to claim 8, characterized in that, When the wind power component operates, multiple regions with gradually decreasing negative pressure are formed inside the housing, including: A first region, located between the wind guiding structure and the wind power component; A second region, adjacent to the radiation component; A third region, adjacent to and communicated with the first air inlet; A fourth region, adjacent to and communicated with the second air inlet; Wherein, the second region is communicated with the first region and the fourth region respectively. The first region is communicated with the third region through the first ventilation part, and the second region is communicated with the third region through the second ventilation part.

10. The drying device according to claim 9, characterized in that, A flow guiding sleeve is provided inside the housing, and the wind power component is located inside the flow guiding sleeve; A first gap air duct for air flow to pass through is formed between the wind power component and the flow guiding sleeve, and the first region and the second region are communicated through the first gap air duct; A second gap air duct through which air can flow is formed between the diversion sleeve and the housing. The second region communicates with the second gap air duct. The second gap air duct communicates with the third region through the second ventilation portion, and the second gap air duct communicates with the fourth region.

11. The drying device according to claim 10, characterized in that, One end of the air guiding sleeve is installed with the air guiding structure to form a seal, and the first gap air duct and the second gap air duct are isolated at the seal. The other end of the air guiding sleeve is installed with the radiation assembly, and at least part of the second region is formed at the installation position. The first gap air duct and the second gap air duct communicate with each other through the second region.

12. The drying equipment according to claim 9, characterized in that, A first heating structure is provided in the fourth region, and the distance between the first heating structure and the third region is less than the distance from the second region.

13. The drying equipment according to claim 11, characterized in that, The air guiding structure is provided with an installation portion for installing to the air guiding sleeve. In the radial direction of the air guiding structure, the second ventilation portion is located outside the installation portion, and the first ventilation portion is located inside the installation portion.

14. The drying equipment according to claim 8, characterized in that, The outer edge of the air guiding structure forms an installation portion for installing to the housing, and at least part of the second ventilation portion is formed on the installation portion.

15. The drying equipment according to claim 8, characterized in that, The gap between the outer edge of the air guiding structure and the housing constitutes the second ventilation portion.

16. The drying equipment according to claim 8, characterized in that, The second ventilation portion is arranged around the outside of the first ventilation portion.

17. The drying equipment according to claim 16, characterized in that, The first ventilation portion is circular or annular, and the second ventilation portion is annular and coincides with the geometric center of the first ventilation portion.

18. The drying equipment according to any one of claims 8 to 17, characterized in that, The air guiding structure is further provided with an air guiding portion connected between the first ventilation portion and the second ventilation portion.

19. The drying equipment according to claim 18, characterized in that, The first ventilation portion, the air guiding portion, and the second ventilation portion are all annular and are sleeved in sequence.

20. The drying equipment according to claim 18, characterized in that, The air guiding portion is inclined with respect to the air flow direction in the main air duct.

21. The drying equipment according to claim 18, characterized in that, The air guiding structure has an inclined side wall that is inclined with respect to the air flow direction of the main air duct, and the air guiding portion and the first ventilation portion are both formed on the inclined side wall.

22. The drying equipment according to any one of claims 8 to 17, characterized in that, The first ventilation portion includes a plurality of ventilation holes, and the axes of at least part of the ventilation holes are inclined with respect to the air flow direction of the main air duct.

23. The drying equipment according to claim 22, characterized in that, The plurality of ventilation holes are annularly distributed, and the axes of at least part of the ventilation holes converge at the wind power assembly.

24. The drying equipment according to claim 23, characterized in that, The first ventilation portion includes a grille structure. The grille structure includes a plurality of support bars extending along the radial and / or circumferential direction of the air guiding structure. Each support bar forms an inclined surface with low wind resistance in the direction towards the first air inlet, and the plurality of support bars enclose to form a plurality of the ventilation holes.

25. The drying equipment according to claim 9, characterized in that, The middle part of the air guiding structure bulges away from the wind power assembly, and a concave cavity is formed on the side facing the wind power assembly. The concave cavity constitutes at least part of the boundary of the first region.

26. The drying equipment according to claim 25, characterized in that, The shape of the air guiding structure is any one of a frustum, a circular truncated cone, a pyramid, and a cone.

27. The drying equipment according to any one of claims 8 to 17, characterized in that, The first air inlet is annular. On any plane perpendicular to the air flow direction of the main air duct, the first ventilation portion, the first air inlet, and the second ventilation portion are projected to form circles or rings nested in sequence from small to large.

28. The drying equipment according to any one of claim 8, characterized in that, It further includes a baffle installed on the housing and / or the air guiding structure. An annular first air inlet is formed between the edge of the baffle and the housing.

29. The drying equipment according to claim 1, characterized in that, It further includes The first heating structure, at least part of the air flow entering the housing from the second air inlet dissipates heat with the first heating structure; The second heating structure, the air flow in the main air duct dissipates heat with the second heating structure; The heat generation amounts during the operation of the second heating structure, the radiation assembly, and the first heating structure decrease in sequence.

30. The drying device according to claim 29, wherein, A first sub-air duct and a second sub-air duct are further provided in the housing, and the upstream of the first sub-air duct and the second sub-air duct are both communicated with the second air inlet; and, The air flow in the first sub-air duct converges into the auxiliary air duct to dissipate heat with the radiation assembly, and then converges into the main air duct to dissipate heat with the second heating structure; The air flow in the second sub-air duct dissipates heat with the first heating structure, and then converges into the main air duct to dissipate heat with the second heating structure.

31. The drying device according to claim 1, wherein, The flow path from the first air inlet to the main air duct is smaller than the flow path from the second air inlet to the main air duct, and / or the overall air resistance from the first air inlet to the main air duct is smaller than the overall air resistance from the second air inlet to the main air duct.

32. The drying device according to claim 1, wherein, A first filter assembly is detachably installed at the first air inlet, and a second filter assembly is detachably installed at the second air inlet.

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