Heating assembly and drying device

Abstract

A heating assembly (10) and a drying device (100). The heating assembly (10) comprises: a core column assembly (11), the outer wall of the core column assembly (11) being provided with a recess (114); a plurality of supporting pieces (12), the supporting pieces (12) being mounted on the core column assembly (11) and extending along the radial direction of an airflow channel (20); a heater (13), the heater (13) surrounding the outer edges of the plurality of supporting pieces (12); and a fuse (15), the fuse (15) being located in the recess (114) and being configured to cut off the circuit of the heater (13) when the temperature is higher than a threshold value.

Description

Heating components and drying equipment Technical Field

[0001] The present application relates to the technical field of drying, and in particular to a heating component and a drying device. Background Art

[0002] Conventional hair dryers can output a stream of hot air to quickly dry hair. To prevent the heating wire within the hair dryer from overheating, a fuse is required to blow in the event of overheating. However, since the fuse must be kept a certain distance from the heating wire, the size of the hair dryer's air duct and heating wire is limited, resulting in low heating efficiency.

[0003] Summary of the Invention

[0004] The present application provides a heating assembly and a drying device, aiming to solve the problem of low heating efficiency of air flow by hair dryers in the prior art.

[0005] The heating assembly provided in the present application includes a core column assembly, the outer wall of which is provided with a groove; a plurality of support plates, each of which is mounted on the core column assembly and extends radially along the airflow channel; a heater, which surrounds the outer edge of the plurality of support plates; and a fuse, which is located in the groove and is configured to cut off the circuit of the heater when the temperature is higher than a threshold.

[0006] The present application also provides a drying device, comprising an airflow component, wherein the airflow component comprises a motor for generating an airflow; an airflow channel, wherein the airflow channel is connected downstream of the airflow component; and the above-mentioned heating component.

[0007] The heating assembly and drying device in this application incorporate a fuse in a recess on the surface of the stem assembly, positioning the fuse radially inward of the heater. This allows the heating assembly to achieve greater heating power without changing the size of the airflow channel. This also translates to a drying device in this application having a smaller airflow channel size while maintaining the same heating power and outputting the same airflow temperature.

[0008] 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

[0009] 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:

[0010] FIG1 is an overall schematic diagram of a heating assembly in certain embodiments of the present application;

[0011] FIG2 is a schematic diagram of the structure of a heating assembly without a heater in certain embodiments of the present application;

[0012] FIG3 is a partial enlarged schematic diagram of point A in FIG2 ;

[0013] FIG4 is a schematic diagram of a stem assembly in certain embodiments of the present application;

[0014] FIG5 is an exploded schematic diagram of a core column assembly in certain embodiments of the present application;

[0015] FIG6 is a schematic diagram of a portion of the structure of a drying device in certain embodiments of the present application;

[0016] FIG7 is a schematic diagram of a partial structure of a hair dryer in the prior art;

[0017] FIG8 is a schematic diagram of the structure of a motor and a heating assembly in certain embodiments of the present application. DETAILED DESCRIPTION

[0018] 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.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] As shown in Figures 1, 2, and 6, an embodiment of the present application provides a heating assembly 10 installed in the airflow channel 20 of a drying device 100. Drying device 100 includes an airflow assembly 30, which, when in operation, creates an airflow within airflow channel 20. Heating assembly 10 heats the airflow within airflow channel 20, causing drying device 100 to output a hot airflow. After the hot airflow flows toward the object to be dried, it simultaneously acts on the moisture through fluid convection and heat exchange, thereby achieving high drying efficiency.

[0024] The heating assembly 10 includes a stem assembly 11, a plurality of support plates 12, a heater 13, and a fuse 15. The stem assembly 11 forms the foundation of the heating assembly 10. The stem assembly 11 is mounted on relevant structures within the drying apparatus 100, such as the housing, the airflow assembly 30, or the airflow channel 20. The stem assembly 11 serves as a mounting for other components of the heating assembly 10.

[0025] Each support sheet 12 is mounted on the core column assembly 11 and extends radially along the air flow channel 20. Multiple coils of heating wire are wrapped around the outer edges of the multiple support sheets 12 to form a heater 13. The support sheet 12 itself is formed of an insulating, heat-resistant material and is mainly used to support the shape of the heater 13 in space. In some specific embodiments, the material of the support sheet 12 can be mica sheet, ceramic, etc. The support sheet 12 is generally also used to install the electrical structure of the heating component 10, such as wires 14, terminals, sockets, contacts, contacts, plugs, circuit boards, etc. In some specific embodiments shown in Figure 1, the number of support sheets 12 is 6, which are evenly distributed along the circumference of the core column assembly 11. In other embodiments, the number of support sheets 12 can also be more or less, such as 3, 5, 7, 8, 11, etc.

[0026] As shown in Figures 2 and 4 , fuse 15 is located in a recess 114 formed on the surface of stem assembly 11. In other words, fuse 15 is located radially inward of stem assembly 11, so it does not create any wind resistance to airflow through heating assembly 10. Fuse 15 is a structure that can interrupt the circuit in the event of an overtemperature condition, thereby preventing the risk of overheating of related components.

[0027] As shown in FIG6 , some embodiments of the present application further provide a drying apparatus 100 comprising an airflow assembly 30, an airflow channel 20, and the aforementioned heating assembly 10. The airflow assembly 30 includes a motor 31 for generating airflow. The airflow channel 20 is connected downstream of the airflow assembly 30. When the motor 31 is in operation, it generates airflow, which flows into the airflow channel 20 and is heated by the heating assembly 10 in the airflow channel 20. The hot airflow is output to the object to be dried, thereby achieving high drying efficiency.

[0028] When designing the drying device 100, it is necessary to determine the maximum threshold value of the temperature of the heater 13 and, based on this maximum threshold value, design the heat resistance of the relevant structures, the power of the circuit components, the flow rate and flow of the output airflow, etc., to ensure that when the temperature of the heater 13 is lower than the maximum threshold value, the drying device 100 can operate normally according to the preset state. However, when an abnormality occurs, such as a hardware or software failure or a circuit short circuit, the temperature of the heater 13 may exceed the above-mentioned maximum threshold value, which will not only cause the relevant structures of the drying device 100 to overheat or even burn out, but may also heat the airflow to an excessively high temperature. The excessively high temperature of the airflow may cause burns to the user or ignite flammable materials. To avoid the occurrence of the above-mentioned situation, a fuse 15 is connected in series in the circuit of the heater 13. When the fuse 15 reaches the melting temperature, it will melt and cut off the circuit of the heater 13, preventing it from continuing to heat up and causing the aforementioned dangers.

[0029] The melting temperature of fuse 15 is generally lower than the maximum temperature threshold of heater 13. If fuse 15 is installed directly adjacent to heater 13, it will prematurely melt before heater 13 reaches its maximum temperature threshold. Therefore, fuse 15 needs to be installed at a certain distance from heater 13 so that its melting temperature corresponds to the maximum temperature threshold of heater 13.

[0030] In conjunction with Figure 1 and the above description, the heater 13 is formed by a heating wire wrapped around a plurality of support plates 12, and its shape can be approximately regarded as cylindrical. The larger the radial dimension of the heater 13, the larger its surface area, the more total amount of heating wire it contains, and the correspondingly greater heating power. In the prior art, in order to ensure the distance between the fuse and the heater, it is necessary to limit the maximum radial dimension of the heater. For example, the radial dimension of the air flow channel of a hair dryer is R, and the distance between the fuse and the heater is L, then the maximum radius of the heater is (RL). It can also be understood that the radial dimension of the air flow channel and the characteristics of the fuse jointly limit the maximum heating power of the heater. If the maximum heating power of the heater is increased, the radial dimension of the air flow channel must be increased accordingly.

[0031] In the aforementioned embodiment of the present application, the fuse 15 is arranged in the groove 114 on the surface of the core column assembly 11, that is, the fuse 15 is located radially inside the heater 13. In the same example as the above-mentioned hair dryer, if the heating assembly 10 in the present application is used, it is only necessary to ensure that the radius of the heater 13 is within the interval (L, R), so that the heater 13 can have a larger radius and correspondingly have a larger heating power. In other words, under the premise of the same air flow channel 20 size and fuse 15 characteristics, the heating assembly 10 in the present application can achieve a greater heating power and heat the airflow to a higher temperature. It can also be understood that, under the premise of having the same heating power and outputting the same temperature airflow, the drying equipment 100 in the present application can have a smaller air flow channel 20 size.

[0032] In addition, in some embodiments, the motor 31 of the drying device 100 is a high-speed motor (rotating speed exceeds 100,000r / min), and it is expected to output a high-speed airflow with a higher wind speed and / or wind pressure to achieve higher drying efficiency. In order to cooperate with the high-speed motor to form a high-speed airflow, it is necessary to limit the size of the airflow channel 20. Under the premise that the speed and power of the high-speed motor remain unchanged, the smaller the size of the airflow channel 20, the higher the wind speed of the output airflow. In the prior art, in order to reserve enough space for the fuse, the minimum size of the airflow channel is limited, making it difficult to achieve a higher wind speed. The drying device 100 having the heating component 10 in the above embodiment has a smaller airflow channel 20 under the premise of having the same heating power and being able to protect the heater 13 from overheating, so it is easy to achieve a higher wind speed.

[0033] As shown in Figures 1 and 6, in some specific embodiments, the axes of the airflow channel 20, airflow assembly 30, and stem assembly 11 coincide. The airflow generated by the airflow assembly 30 is evenly distributed radially as it flows through the airflow channel 20 and stem assembly 11, forming a hot airflow with relatively uniform radial temperature and velocity. Taking the drying apparatus 100 as an example, this radially uniform hot airflow with relatively uniform temperature and velocity ensures that the hair within the drying area is evenly heated, preventing it from becoming tangled, and resulting in a smoother, dried hair.

[0034] In some embodiments shown in Figures 1, 4, and 5, the core column assembly 11 includes a first thermal insulation sleeve 112 and two end caps 113. The first thermal insulation sleeve 112 is located radially inward of the heater 13 and is provided with a notch 1121 corresponding to the groove 114. The first thermal insulation sleeve 112 constitutes a portion of the outer wall of the core column assembly 11. The first thermal insulation sleeve 112 is formed of a heat-resistant and / or low thermal conductivity material and has good heat resistance and / or low thermal conductivity.

[0035] The end caps 113 are formed of insulating material and are mounted on both ends of the first thermal insulation sleeve 112. Each support plate 12 is mounted to the end caps 113. The end caps 113 are used to mount to the support plates 12 and related electrical structures (such as wires 14, contacts, terminals, etc.). They need to be insulated to avoid short circuits with the electrical structures.

[0036] The heating wire is wrapped around the area of ​​the support plate 12 corresponding to the first insulation sleeve 112 to form the heater 13. It can also be thought that for the stem assembly 11, the first insulation sleeve 112 is located radially inside the heater 13, and the end cover 113 is at least partially not radially inside the heater 13.

[0037] When the heating assembly 10 is in operation, the heater 13 continuously emits heat. The first thermal insulation sleeve 112 itself can maintain structural stability at higher temperatures and transfer only a small amount of heat to the end cap 113. In other words, during operation of the heating assembly 10, the temperature of the end cap 113 is lower than that of the first thermal insulation sleeve 112, thereby reducing the heat resistance requirements of the end cap 113.

[0038] In some more specific embodiments, the end cap 113 is formed of a material that is easy to form, such as plastic, rubber, etc., and can be relatively easily formed into a preset shape to meet the installation requirements of the support sheet 12. It is easy to understand that within a certain cost range, it is difficult for a material to take into account both easy forming and high heat resistance. Therefore, for the core column assembly 11, the middle part is formed of a first heat-insulating sleeve 112 using a material with better heat resistance to support the overall shape of the core column assembly 11 and isolate heat transfer; the end caps 113 are formed of a material that is easy to form at both ends to install multiple support sheets 12. In this way, the core column assembly 11 as a whole can take into account both heat resistance and ease of assembly without increasing costs.

[0039] In some embodiments as shown in FIG2 , at least one support piece 12a among the plurality of support pieces 12 has a mounting portion 121. The mounting position of the support piece 12 corresponds to the groove 114, and the mounting portion 121 is at least partially located within the groove 114. The fuse 15 is mounted on the mounting portion 121 of the support piece 12a. It can also be understood that at least one support piece 12a has a different shape from the other support pieces 12, having a radially inwardly protruding mounting portion 121, and can only be mounted on the stem assembly 11 at a position corresponding to the groove 114. If the support piece 12a is mounted in other positions, it will interfere with the surface of the stem assembly 11.

[0040] In conjunction with some of the aforementioned embodiments, the relevant electrical structures of the heating assembly 10 are at least partially mounted on the support plate 12. Therefore, mounting the fuse 15 on the support plate 12 can simultaneously achieve both structural installation and electrical connection of the fuse 15. For example, the pins of the fuse 15 can be fixed to the mounting portion 121 of the support plate 12 using metal rivets, solder, screws, etc., and the relevant electrical structures can be connected to the metal rivets, solder, screws, etc., thereby simultaneously achieving both structural installation and electrical connection of the fuse 15.

[0041] In other embodiments not shown, all support plates 12 have the same shape and structure. Fuse 15 has bent pins that extend from grooves 114 and connect to the support plates 12 corresponding to the grooves 114, thereby achieving structural installation and electrical connection. This simplifies the assembly of support plates 12, eliminating the need to pay special attention to their position when assembling them into stem assembly 11.

[0042] In other embodiments not shown, the fuse 15 can be directly installed in the groove 114 through relevant insulating and heat-insulating clips, support blocks and other structures, and then electrically connected to the relevant electrical structure through connecting wires or bent pins.

[0043] In some specific embodiments shown in Figures 2, 3, and 5, the end cap 113 is provided with a plurality of slots 1131 corresponding to the support plates 12. The support plates 12 are inserted into the slots 1131 to form an interference fit, thereby achieving mutual installation with the end cap 113. In other embodiments, the support plates 12 and the end cap 113 can also be installed by bolts, welding, gluing, clamping, or other methods.

[0044] Among the multiple slots 1131 on the end cap 113, at least one slot 1131a extends through the groove 114 to form a wire hole. As previously mentioned, the fuse 15 is located in the groove 114 and needs to be connected to the circuit of the heating assembly 10, so it must be connected to the relevant electrical structure. In the above embodiment, the electrical structure includes the wire 14, which can pass through the wire hole of the slot 1131a, enter the groove 114, and connect to the fuse 15.

[0045] In some specific embodiments, the fuse 15 itself is mounted on the support plate 12, and the wire 14 is also fixed to the support plate 12. The support plate 12a is installed in the slot 1131a that forms the wire hole. The wire 14 can pass through the wire hole along the support plate 12a and connect to the fuse 15. Securing the wire 14 to the support plate 12 ensures that the wire 14 always remains in the preset position, preventing the wire 14 from being displaced by airflow and contacting the heater 13, causing a short circuit, or being burned by the high temperature of the heater 13.

[0046] In some embodiments not shown, at least one of the multiple wires 14 of the heating assembly 10 passes through the interior of the stem assembly 11. This allows the wire 14 to pass through the stem assembly 11 along its axis and connect to a corresponding position. The wire 14 located inside the stem assembly 11 is not exposed to the hot air flow, thus preventing it from melting or being damaged in a high-temperature environment.

[0047] In other embodiments not shown, all slots 1131 on the end cap 113 have the same shape and no wire holes are formed. The wire 14 can extend along the surface of the stem assembly 11 and connect to the fuse 15 .

[0048] As previously mentioned, first thermal insulation sleeve 112 is a hollow, cylindrical structure with notch 1121. Consequently, first thermal insulation sleeve 112 is relatively weak, which in turn reduces the overall strength of stem assembly 11. During assembly and use of heating assembly 11, this insufficient strength can easily cause stem assembly 11 to deform, shifting the position of support plate 12 and potentially causing the heating wires of heater 13 to contact and short-circuit.

[0049] In order to enhance the overall strength of the core column assembly 11, in some embodiments as shown in Figures 4 and 5, the core column assembly 11 further includes a base 111. The base 111 extends axially and is respectively mounted on corresponding end covers 113 at both ends, and the groove 114 is provided on the base 111. The first thermal insulation sleeve 112 is sleeved and mounted on the outside of the base 111. The base 111 is located in the radial middle of the core column assembly 11 and is formed of a relatively high-strength material. The base 111 simultaneously connects and supports the first thermal insulation sleeve 112 and the two end covers 113, so that the core column assembly 11 as a whole has a relatively high strength and prevents the core column assembly 11 from being deformed.

[0050] In addition, since the first heat insulating sleeve 112 sleeved outside the base 111 has a heat insulating function, it can isolate the heat from the heater 13, reduce the temperature rise of the base 111, and prevent the base 111 from transferring high temperature to the end cover 113.

[0051] In some specific embodiments, the first thermal insulation sleeve 112 is formed from mica. Mica is a rock-forming mineral with hexagonal, plate-like crystals. It is one of the main rock-forming minerals and has excellent insulation and high-temperature resistance properties. Mica crystals have a layered structure, resulting in plate-like crystals that are easily processed into thin sheets. In some specific embodiments, the aforementioned support sheet 12 is also formed from mica.

[0052] In some specific embodiments, the base 111 is formed of a metal material, such as steel, aluminum, copper, and various alloys. Metal materials generally have good strength and can be easily processed and formed through methods such as casting and CNC machine cutting. Although metal materials may have high thermal conductivity, as previously described, the first thermal insulation sleeve 112 isolates heat from the heater 13 and the base 111, minimizing the temperature rise of the base 111 itself and preventing high temperatures from being transferred to the end cap 113.

[0053] In some specific embodiments, each end cap 113 is formed of plastic. Plastic itself is easy to process and shape, and can be formed into a structure of a certain complexity through various methods such as injection molding, extrusion molding, compression molding, thermoforming, 3D printing, etc., for adapting to the installation of the base 111, the first thermal insulation sleeve 112, and the plurality of support sheets 12.

[0054] In some specific embodiments, as shown in FIG5 , the base 111 has an axially extending mounting hole 1111, and each end cap 113 is mounted to the base 111 through the mounting hole 1111, thereby achieving installation between the base 111 and the end cap 113. In some more specific embodiments, the end caps 113 are formed with studs that can be screwed into the mounting holes 1111 for mutual installation. In some more specific embodiments, the end caps 113 are provided with through holes at positions corresponding to the mounting holes 1111, and screws, rivets, or the like are inserted through the through holes in the end caps 113 and into the mounting holes 1111 for fixation, thereby achieving installation between the base 111 and the end caps 113. In some more specific embodiments, a through hole is provided on the end cover 113 at a position corresponding to the mounting hole 1111, and the mounting hole 1111 can be exposed from the through hole. Other parts of the drying device 100, such as the shell, the airflow component 30, etc., are installed to the mounting hole 1111 of the base 111 by bolts, thereby fixing the heating component 10 and other parts of the drying device 100 to each other.

[0055] In some embodiments, the surface color of the fuse 15 is configured to have a high absorption rate for the thermal radiation from the heater 13. For example, the surface color of the fuse 15 can be black, purple, dark brown, etc. According to the above content, the working principle of the fuse 15 is that it melts when its temperature reaches the melting temperature. When the heater 13 is in operation, it will send heat outward through both thermal radiation and thermal conduction. Among them, the heat emitted by thermal conduction heats the airflow, and the airflow then heats the surface of the fuse 15; the heat emitted by thermal radiation is directly transferred to the surface of the fuse 15. Since the transmission speed of thermal radiation is the speed of light, the heating rate of the fuse 15 by thermal radiation is much faster than that of thermal conduction. Configuring the surface color of the fuse 15 to have a high thermal radiation absorption efficiency can make the fuse 15 more sensitive to the heat of thermal radiation and more likely to melt quickly when the heater 13 overheats.

[0056] For example, the maximum temperature threshold of heater 13 is C1, and the melting temperature of fuse 15 is C2. When heater 13 malfunctions and overheats, it takes time t1 for the airflow to reach C1. After time t2, the airflow heats fuse 15 to C2 and melts it. The melting delay time of fuse 15 is (t1 + t2). Alternatively, it can be understood that after the heater 13 malfunctions and overheats, it continues to operate for (t1 + t2) before being powered off. If fuse 15 in the above embodiment is used, when heater 13 malfunctions and overheats, fuse 15 absorbs heat from both the heated airflow and the thermal radiation emitted by heater 13. The time it takes to reach temperature C2 is t3, which is necessarily less than (t1 + t2). In other words, fuse 15 can cut off power more quickly after heater 13 overheats, shortening the time it operates in the overheat state. This further reduces the risks of airflow overheating and structural overheating caused by heater 13 operating in the overheat state.

[0057] In some embodiments, the surface color of the end cap 113 is configured to have a low absorptivity to thermal radiation. For example, the surface color of the end cap 113 can be white, bright silver, light gray, etc. The end cap 113 should be minimized from being heated by the heater 13. Configuring its surface color to have a low absorptivity to thermal radiation can reduce the amount of heat absorbed by the end cap 113 from the heater 13 through thermal radiation, thereby reducing the temperature rise of the end cap 113 and lowering the heat resistance requirements of the end cap 113.

[0058] In some embodiments of the drying apparatus 100 shown in FIG6 , the motor 31 thereof generates an annular airflow during operation. An annular airflow can be understood as follows: in a plane perpendicular to the axis of the airflow, the airflow velocity is low or even zero in the radial center region, while the airflow velocity is higher in the annular region at the edge. The inner diameter of this annular region is referred to as the inner diameter of the annular airflow, and the outer diameter of the annular region is referred to as the outer diameter of the annular airflow.

[0059] An annular air duct is formed between the core column assembly 11 and the air flow channel 20. In addition, the outer diameter of the core column assembly 11 is less than or equal to the inner diameter of the annular airflow. Therefore, the core column assembly 11 itself is in an area with lower wind speed, and the wind resistance formed on the airflow is small, and the impact on the smoothness of the airflow and wind noise is also small. The inner diameter of the airflow channel 20 is greater than or equal to the outer diameter of the annular airflow. The annular airflow output from the airflow assembly 30 can smoothly enter the annular air duct in the airflow channel 20, and will not be affected by additional wind resistance at the connection between the airflow channel 20 and the airflow assembly 30.

[0060] In some specific embodiments, as shown in FIG6 , the motor 31 includes a housing and a rotor assembly. The housing has an inner wall 313 and an outer wall 311, with an annular cavity 312 formed between the inner wall 313 and the outer wall 311. The rotor assembly includes a shaft rotatably mounted on the inner wall 313 and a propeller 314 mounted on the shaft. When the propeller 314 rotates, an annular airflow is formed in the annular cavity 312 and outputted outward.

[0061] According to aerodynamics, the propeller 314 performs work on the air during rotation to form an airflow, and the overall flow direction of the airflow is roughly parallel to the axis of the rotating shaft of the propeller 314. However, since the propeller 314 cannot constrain the airflow in the radial direction, the formed airflow will quickly diffuse during the flow, resulting in a decrease in flow rate. In order to make the airflow output by the motor 31 more convergent, in the above embodiment, the airflow formed by the propeller 314 in the annular cavity 312 is constrained radially by the outer wall 311 during the flow, so that the airflow output by the motor 31 has a smaller diffusion angle and can maintain a higher flow rate over a longer distance.

[0062] Accordingly, the outer diameter of the stem assembly 11 is less than or equal to the outer diameter of the inner wall 313, which is also less than or equal to the inner diameter of the annular airflow. This places the stem assembly 11 in a region of lower wind speed within the airflow, creating less wind resistance and minimizing the impact on airflow smoothness and wind noise. The inner diameter of the airflow channel 20 is greater than or equal to the inner diameter of the outer wall 311, ensuring that the airflow is not affected by additional wind resistance at the junction of the airflow channel 20 and the airflow assembly 30.

[0063] FIG7 shows a partial structure of a typical hair dryer 200 in the prior art. As can be seen from the foregoing, in order to reserve enough space for the fuse in the prior art, the airflow channel 20a of the hair dryer 200 has a larger size and is larger than the airflow outer diameter of the airflow component 30a. That is, the airflow of the airflow component 30a will diffuse when entering the airflow channel 20a. Moreover, in order to ensure that the airflow output by the hair dryer 200 has a higher flow rate, it is necessary to limit the air outlet to a smaller size. Therefore, the airflow will shrink when it flows out of the air outlet from the airflow channel 20a. In the above process, the flow cross-section of the airflow undergoes a process of changing from small to large (flowing from the airflow component 30a to the airflow channel 20a) and then from large to small (flowing from the airflow channel 20a to the air outlet). According to gas thermodynamics, each change in the flow cross-section during the propagation of the airflow will result in energy loss. Therefore, the hair dryer 200 has a low energy utilization rate for the heating process of the airflow.

[0064] According to Figure 6 and the above content, it can be seen that the drying device 100 in the present application has a smaller-sized airflow channel 20, and the flow cross-section formed by the airflow channel 20 and the core column assembly 11 does not change on the axis, and is roughly the same size as the annular cavity 312 of the airflow assembly 30. Therefore, in the process of the airflow output by the airflow assembly 30 flowing along the airflow channel 20 until it flows out of the drying device 100, its flow cross-section remains roughly unchanged and almost no energy loss occurs. Therefore, the heating process of the airflow by the heating assembly 100 has a higher energy utilization rate. It can also be understood that, under the premise of inputting the same amount of energy, the drying device 100 in the present application can output an airflow with a higher temperature; or, under the premise of outputting an airflow with the same temperature, the drying device 100 in the present application consumes less energy.

[0065] In some embodiments shown in FIG6 , the airflow assembly 30 further includes a mounting base 32, and the motor 31 is mounted within the mounting base 32. The mounting base 32 is fixed within the drying apparatus 100. The mounting base 32 can be mounted on a housing or other structure of the drying apparatus 100, and the specific mounting method is not the focus of this application.

[0066] In some specific embodiments, the air flow channel 20 is mounted at one end of the mounting base 32 and is closely adjacent to the downstream end of the motor 31. The air flow generated by the motor 31 during operation can directly enter the air flow channel 20 without leaking between the mounting base 32 and the air flow channel 20.

[0067] In some specific embodiments, the heating assembly 10 is mounted at one end of the mounting base 32 and is closely adjacent to the downstream end of the motor 31. The airflow generated by the motor 31 when in operation contacts the heating assembly 10 immediately after exiting the motor 31, maximizing the contact area between the heating assembly 10 and the airflow within a limited axial space to maximize the heating efficiency of the airflow.

[0068] In some specific embodiments, the air flow channel 20 and the heating component 10 are both mounted on a mounting base 32. The mounting base 32 can simultaneously fix the motor 31, the air flow channel 20, and the heating component 10, so that these structures form a whole. Since the motor 31 vibrates in all directions during operation, slight displacement may occur. Mounting the air flow channel 20 and the heating component 10 on the mounting base 32 can ensure sufficient fixing strength between the motor 31, the air flow channel 20, and the heating component 10, and will not affect the relative positional relationship of the three when the motor 31 vibrates, so that the air flow can always flow along the preset path and be heated.

[0069] In some specific embodiments, the drying device 100 further includes a sealing ring (not shown) mounted between the mounting base 32 and the air flow channel 20. The sealing ring is capable of expanding and contracting along the axial direction of the air flow assembly 30. The sealing ring is used to seal between the mounting base 32 and the air flow channel 20, ensuring that all airflow generated by the motor 31 enters the air flow channel 20.

[0070] During operation, the motor 31 performs work on the airflow, pushing the airflow to accelerate and flow in the direction of the airflow channel 20. At the same time, the motor 31 itself is also subjected to the reaction force of the airflow, and the reaction force points in the direction away from the airflow channel 20. In particular, at the moment when the motor 31 is started, the motor 31 is transformed from a state without force to a state subjected to the reaction force of the airflow, which will cause the motor 31 to be displaced in the direction away from the airflow channel 20, that is, the distance between the motor 31 and the airflow channel 20 will suddenly increase. In order to avoid air leakage in this state, the sealing ring is configured to be able to expand and contract in the axial direction along the airflow component 30. When the motor 31 is displaced at the moment of startup, the mounting seat 32 pulls the sealing ring to deform, and the sealing ring can still maintain a sealed state after deformation. In other working conditions, when the motor 31 accelerates or decelerates, the reaction force it is subjected to will change accordingly and displace, and the sealing ring will expand and contract and deform in the axial direction accordingly, so as to always maintain a sealed state between the mounting seat 32 and the airflow channel 20.

[0071] In some specific embodiments as shown in FIG8 , the motor 31 has an adapter plate 315 for connecting to an external circuit to enable control signals and / or power input to be sent to the motor 31. Since the rotor assembly of the motor 31 is located on the inner wall 313, one end of the adapter plate 315 is connected to the inner wall 313, and the other end spans the annular cavity 312 and extends to the outside of the outer wall 311. In other words, at least a portion of the adapter plate 315 is located in the airflow formed by the motor 31, which will affect the airflow. According to some of the aforementioned contents, it can be seen that the support plate 12 in the heating assembly 10 itself also extends along the radial direction of the airflow, which will also affect the airflow.

[0072] In order to minimize the impact on the airflow, on any plane perpendicular to the direction of the airflow, the projection pattern formed by at least one support sheet 12 and the projection pattern formed by the adapter plate 315 at least partially overlap, so that the adapter plate 315 and the support sheet 12 overlap in the direction of the airflow. The adapter plate 315 located upstream will block the support sheet 12 in the airflow, reducing the impact of the support sheet 12 on the airflow, and also reducing the overall impact of the heating component 10 and the airflow component 30 on the airflow.

[0073] In some embodiments not shown, the annular cavity 312 of the motor 31 is further provided with a plurality of guide vanes for guiding the airflow within the annular cavity 312. On any plane perpendicular to the direction of the airflow, the projection pattern formed by at least one support sheet 12 and the projection pattern formed by at least one guide vane at least partially overlap, so that the guide vane blocks the support sheet 12 in the airflow, reducing the impact of the support sheet 12 on the airflow. In a more specific embodiment, the number of support sheets 12 is set to be the same as the number of guide vanes (for example, 6, 7, 9, etc.), and the positions of the support sheets 12 correspond one-to-one with the guide vanes, so that all support sheets 12 are blocked by the corresponding guide vanes. On the one hand, this can reduce the impact of the support sheets 12 on the airflow, and on the other hand, it is equivalent to extending the length of the guide vanes in the airflow direction, increasing the guidance of the airflow, and making the airflow output by the drying device 100 have better smoothness.

[0074] As shown in FIG6 , in some specific embodiments, the drying device 100 further includes an air guide grille 21. The air guide grille 21 is located at the air outlet formed downstream of the air flow channel 20 and is mounted on the core column assembly 11. The air guide grille 21 can guide the outflowing air flow and reduce the turbulence generated when the air flow passes through the heating component 10. In addition, the air guide grille 21 also forms a partition between the heating component 10 and the external environment, preventing foreign objects such as fingers, cloth, hair, and paper from entering the air flow channel 20 from the air outlet and contacting the heating component 10, thereby preventing the risk of overheating.

[0075] In some embodiments, as shown in Figure 6, the drying apparatus 100 further includes a radiation assembly 40 capable of emitting infrared radiation. The radiation assembly 40 is annular, and the airflow channel 20 is mounted on the inner edge of the annular shape of the radiation assembly 40. As previously mentioned, the drying apparatus 100 itself can output either ambient or hot airflow. The infrared radiation emitted by the radiation assembly 40 and the airflow act together to affect the object being dried. Infrared radiation does not heat the object being dried, thus improving drying efficiency while preventing damage to the object caused by high temperatures.

[0076] As can be seen from the foregoing, the heating assembly 10 employed in this application can accommodate a smaller airflow channel 20. Therefore, a larger portion of the end surface of the drying apparatus 100 can be designed to output infrared radiation (hereinafter referred to as the light-emitting portion), while a smaller portion can be designed as an air outlet for the airflow. This allows the drying apparatus 100 to output sufficient infrared radiation without significantly increasing its size.

[0077] Furthermore, compared to infrared radiation, airflow is more likely to diffuse along its transmission path. To ensure that the airflow and infrared radiation act on a roughly overlapping area at a predetermined distance, thereby simultaneously drying the area with both the infrared radiation and the airflow, it is necessary to minimize the diffusion of the airflow. In the above embodiment, the air outlet of the drying device 100 is relatively small, while the light outlet is relatively large. At the predetermined distance, the more diffused airflow overlaps with the less diffused infrared radiation, and together they act on the target area of ​​the object to be dried.

[0078] In some specific embodiments, the airflow channel includes a second thermally insulating sleeve 20 formed of a heat-resistant and / or low-thermal-conductivity material. The heating assembly 10 is located within the second thermally insulating sleeve 20 and the two are coaxial. An annular space of uniform radial dimensions is formed between the stem assembly 11 and the second thermally insulating sleeve 20 to allow the annular airflow output by the electric motor 31 to pass through.

[0079] The second thermal insulation sleeve 20 can be made of the same or different materials as the first thermal insulation sleeve 112, and both function to insulate heat. More specifically, the second thermal insulation sleeve 20 can insulate heat transfer between the heating assembly 10 and the radiant assembly 40, thereby preventing the heat generated by the heating assembly 10 during operation from heating the radiant assembly 40.

[0080] In summary, in combination with the aforementioned multiple embodiments, the multiple parts in the drying device 100 are coupled with each other, so that the drying device 100 has a unique drying effect. Specifically, the fuse 15 is set in the groove 114 of the core column assembly 11 in the heating component 10, so that the air flow channel 20 can be designed to be smaller in size while ensuring that there is a sufficient distance between the fuse 15 and the heater 13. The smaller-sized air flow channel 20 helps to achieve a higher wind speed, and the air outlet occupies less space on the end face of the drying device 100. In this way, sufficient space can be reserved for the radiation component 40 without increasing the overall size of the drying device 100. The airflow and infrared radiation of the drying device 100 form overlapping action areas at a preset distance, thereby efficiently drying the object to be dried in three ways: fluid convection, heat exchange, and thermal radiation.

[0081] 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, orientations, positions, 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 representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, orientations, positions, 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.

[0082] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A heating component is installed in the air flow channel of a drying device; characterized in that, Comprising: A core column assembly, on the outer wall of which there are grooves; A plurality of support pieces, each of which is mounted on the core column assembly and extends radially along the air flow channel; A heater, which surrounds the outer edges of the plurality of support pieces; A fuse, which is located in the groove and is configured to cut off the circuit of the heater when the temperature is higher than a threshold value.

2. The heating component according to claim 1, characterized in that, The core column assembly includes: A first heat insulation sleeve, the outer wall of which constitutes a part of the outer wall of the core column assembly. There is a notch corresponding to the groove on the first heat insulation sleeve, and the first heat insulation sleeve is formed of a heat-resistant and / or low heat conductivity material; Two end caps, which are respectively mounted on both ends of the first heat insulation sleeve, and the end caps are formed of an insulating material; And each of the support pieces is mounted on the end cap.

3. The heating component according to claim 2, characterized in that, At least one of the support pieces has a mounting portion located in the groove, and the fuse is mounted on the mounting portion.

4. The heating component according to claim 2, characterized in that, A plurality of slots for inserting and mounting the support pieces are formed on the end cap, and at least one slot penetrates to the groove and forms a wire passing hole for the wire of the fuse to pass through.

5. The heating component according to claim 2, characterized in that, The core column assembly further includes a base, which extends axially and both ends are respectively mounted to the corresponding end caps, and the groove is provided on the base; The first heat insulation sleeve is sleeved and mounted outside the base.

6. The heating component according to claim 5, characterized in that, The first heat insulation sleeve is formed of mica material, the base is formed of metal material, and each end cap is formed of plastic.

7. The heating component according to claim 5, characterized in that, The base has an axially penetrating mounting hole, and each end cap is mounted on the base through the mounting hole.

8. The heating component according to any one of claims 1 to 7, characterized in that, The surface color of the fuse is configured to have a high absorption rate for thermal radiation.

9. The heating component according to any one of claims 2 to 7, characterized in that, The surface color of the end cap is configured to have a low absorption rate for thermal radiation.

10. The heating component according to any one of claims 1 to 7, characterized in that, It further includes a plurality of connecting wires for connecting to an external circuit, and at least one of the connecting wires passes through the inside of the core column assembly.

11. The heating component according to any one of claims 1 to 7, characterized in that, The number of the support pieces is six, and they are evenly arranged along the circumferential direction of the core column assembly.

12. A drying device, characterized in that, Comprising: An air flow assembly, which includes a motor for generating air flow; An air flow channel, which is connected downstream of the air flow assembly; The heating assembly according to any one of claims 1 to 11.

13. The drying device according to claim 12, characterized in that, The axes of the air flow channel, the air flow assembly, and the core column assembly coincide.

14. The drying device according to claim 12, characterized in that, When the motor operates, it can output an annular air flow; and, The outer diameter of the core column assembly is less than or equal to the inner diameter of the annular air flow; The inner diameter of the air flow channel is greater than or equal to the outer diameter of the annular air flow.

15. The drying device according to claim 12, wherein, The motor includes a housing and a rotor assembly. The housing has an inner wall and an outer wall, and an annular cavity is formed between the inner wall and the outer wall; the rotor assembly includes a rotating shaft rotatably mounted on the inner wall and a propeller mounted on the rotating shaft. When the propeller rotates, an annular air flow is formed in the annular cavity; and, The outer diameter of the core column assembly is less than or equal to the outer diameter of the inner wall; The inner diameter of the air flow channel is greater than or equal to the inner diameter of the outer wall.

16. The drying device according to claim 15, wherein, The motor includes an adapter board for providing control signals and / or power inputs, one end of the adapter board is connected to the rotor assembly, and the other end radially spans the annular cavity and extends to the outside of the housing; and, On any plane perpendicular to the air flow direction, the projected pattern formed by at least one of the support sheets and the projected pattern formed by the adapter board at least partially overlap.

17. The drying device according to any one of claims 12 to 16, wherein, The air flow assembly further includes a mounting seat, and the motor is installed inside the mounting seat; The air flow channel and / or the heating assembly are installed at one end of the mounting seat and are closely adjacent to the downstream end of the motor.

18. The drying device according to claim 17, wherein, It further includes a sealing ring that can axially expand and contract along the air flow assembly, and the sealing ring seals between the mounting seat and the air flow channel.

19. The drying device according to any one of claims 12 to 16, wherein, The downstream end of the air flow channel forms an air outlet, and a grille is provided at the air outlet, and the grille is installed on the core column assembly.

20. The drying device according to any one of claims 12 to 16, wherein, It further includes a radiation assembly capable of outputting infrared radiation, the radiation assembly is annular, and the air flow channel is installed along the annular inner edge of the radiation assembly.

21. The drying device according to claim 20, wherein, The air flow channel includes a second heat insulation sleeve formed of heat-resistant and / or low thermal conductivity material, and the heating assembly is located in the second heat insulation sleeve and the two are coaxial.

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