Heating assembly and drying equipment

Abstract

The utility model discloses a heating assembly and drying equipment. The heating assembly comprises a core column assembly, and a groove is formed in the outer wall of the core column assembly; the plurality of supporting sheets are mounted on the core column assembly and extend in the radial direction of the airflow channel; the heater surrounds the outer edges of the plurality of supporting sheets; and the fuse is positioned in the groove and is configured to cut off a circuit of the heater when the temperature is higher than a threshold value. According to the heating assembly and the drying equipment, the fuse is arranged in the groove in the surface of the core column assembly, so that the fuse is located inside the heater in the radial direction, and the heating assembly can achieve higher heating power on the premise that the size of an airflow channel is not changed. It can also be understood that the drying equipment can have a smaller airflow channel size on the premise of having the same heating power and outputting airflow at the same temperature.

Description

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] The hair dryer in the prior art can output hot air flow to quickly dry the hair. In order to prevent the heating wire in the hair dryer from overheating, a fuse needs to be provided to melt when overheating occurs. Since the fuse needs to maintain a certain distance from the heating wire, the size of the air duct and the heating wire of the hair dryer is limited, and the heating efficiency of the air flow is low. Utility Model Content

[0003] The present application provides a heating component and a drying device, aiming to solve the problem of low heating efficiency of airflow by hair dryers in the prior art.

[0004] 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 value.

[0005] The present application also provides a drying device, including an airflow component, wherein the airflow component includes 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.

[0006] In the heating assembly and drying device of the present application, the fuse is arranged in the groove on the surface of the stem assembly, so that the fuse is located radially inside the heater, and the heating assembly can achieve a greater heating power without changing the size of the airflow channel. It can also be understood that under the premise of having the same heating power and outputting the same temperature airflow, the drying device of the present application can have a smaller airflow channel size.

[0007] 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 the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] 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:

[0009] Figure 1 This is an overall schematic diagram of a heating assembly in certain embodiments of the present application;

[0010] Figure 2This is a schematic diagram of the structure of a heating assembly without a heater in certain embodiments of the present application;

[0011] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;

[0012] Figure 4 A schematic diagram of a core column assembly in certain embodiments of the present application;

[0013] Figure 5 An exploded schematic diagram of a core column assembly in certain embodiments of the present application;

[0014] Figure 6 This is a partial structural schematic diagram of a drying device in some embodiments of the present application;

[0015] Figure 7 It is a partial structural schematic diagram of a hair dryer in the prior art;

[0016] Figure 8 This is a schematic diagram of the structure of the motor and heating component in certain embodiments of the present application. DETAILED DESCRIPTION

[0017] 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 cannot be understood as limiting the embodiments of the present application.

[0018] In the description of the present 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" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0019] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0020] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0021] The disclosure of this article provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described herein. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed in itself. In addition, the various specific processes and examples of materials provided by the present application, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0022] like Figure 1 , Figure 2 and Figure 6 As shown, a heating assembly 10 is provided in an embodiment of the present application, which is installed in an air flow channel 20 of a drying device 100. The drying device 100 has an air flow assembly 30, and when the air flow assembly 30 is in operation, an air flow is formed in the air flow channel 20. The heating assembly 10 can heat the air flow in the air flow channel 20, so that the drying device 100 outputs a hot air flow. After the hot air flow flows to the object to be dried, it acts on the moisture through fluid convection and heat exchange at the same time, thereby achieving a higher drying efficiency.

[0023] The heating assembly 10 includes a stem assembly 11, a plurality of support sheets 12, a heater 13 and a fuse 15. The stem assembly 11 constitutes the basic part of the heating assembly 10. The stem assembly 11 is installed on the relevant structure in the drying device 100, such as the housing, the airflow assembly 30, the airflow channel 20, etc. The stem assembly 11 can be installed for other parts of the heating assembly 10.

[0024] Each support sheet 12 is mounted on the core column assembly 11 and extends radially along the airflow channel 20. Multiple turns 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 may be mica sheet, ceramic, etc. The support sheet 12 is also generally used to install the electrical structure of the heating component 10, such as wires 14, terminals, sockets, contacts, contacts, plugs, circuit boards, etc. Figure 1 In some specific embodiments shown, the number of support sheets 12 is 6, which are evenly distributed along the circumference of the stem assembly 11. In other embodiments, the number of support sheets 12 may be more or less, such as 3, 5, 7, 8, 11, etc.

[0025] refer to Figure 2 and Figure 4 As shown, the fuse 15 is located in a groove 114 opened on the surface of the stem assembly 11. In other words, the fuse 15 is located radially inside the stem assembly 11, so the fuse 15 does not form a wind resistance to the airflow flowing through the heating assembly 10. The fuse 15 is a structure that can cut off the circuit when overheated, and is used to avoid the risk of overheating of related components.

[0026] like Figure 6 As shown, in some embodiments of the present application, a drying device 100 is also provided, comprising an airflow component 30, an airflow channel 20 and the above-mentioned heating component 10. The airflow component 30 comprises a motor 31 for generating an airflow. The airflow channel 20 is connected downstream of the airflow component 30. The motor 31 generates an airflow when in operation, and the airflow flows to the airflow channel 20 and is heated by the heating component 10 in the airflow channel 20. The hot airflow is output to the object to be dried to achieve a higher drying efficiency.

[0027] When designing the drying device 100, it is necessary to determine the maximum threshold of the temperature of the heater 13, and based on the maximum threshold, design the heat resistance of the relevant structure, 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, the drying device 100 can operate normally according to the preset state. However, when abnormal conditions such as hardware or software failures, circuit short circuits, etc. occur, the temperature of the heater 13 may exceed the above-mentioned maximum threshold, which will not only cause the relevant structures of the drying device 100 to be overheated or even burned, but also may heat the airflow to an excessively high temperature. The excessively high temperature of the airflow may cause the risk of scalding the user or igniting flammable materials. In order to avoid the above situation, a fuse 15 is connected in series in the circuit of the heater 13. When the fuse 15 reaches the melting temperature, it melts and cuts off the circuit of the heater 13 to prevent it from continuing to heat up and causing the aforementioned dangers.

[0028] The melting temperature of the fuse 15 is generally lower than the maximum threshold of the temperature of the heater 13. If the fuse 15 is directly installed at a position close to the heater 13, the fuse 15 will be blown in advance before the heater 13 reaches the maximum temperature threshold. Therefore, the fuse 15 needs to be installed at a certain distance from the heater 13 so that when it reaches the melting temperature, it corresponds to the maximum threshold of the temperature of the heater 13.

[0029] Combination Figure 1 As mentioned above, the heater 13 is formed by electric heating wires wrapped around a plurality of support plates 12, and its shape can be approximately regarded as a cylinder. The larger the radial dimension of the heater 13, the larger its surface area, the more total amount of electric heating wires 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 airflow 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 airflow 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 airflow channel must be increased accordingly.

[0030] In the aforementioned embodiment of the present application, the fuse 15 is disposed in the groove 114 on the surface of the stem 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 a larger heating power. In other words, under the premise of the same airflow 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 device 100 in the present application can have a smaller airflow channel 20 size.

[0031] In addition, in some embodiments, the motor 31 of the drying device 100 is a high-speed motor (with a rotation speed exceeding 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 form a high-speed airflow with a high-speed motor, 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-mentioned 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.

[0032] like Figure 1 and Figure 6 As shown, in some specific embodiments, the axes of the airflow channel 20, the airflow assembly 30, and the stem assembly 11 are all coincident. When the airflow formed by the airflow assembly 30 flows through the airflow channel 20 and the stem assembly 11, it can be evenly distributed in the radial direction, forming a hot airflow with relatively uniform wind temperature and wind speed in the radial direction. Taking the process of using the drying device 100 to blow hair as an example, the hot airflow with relatively uniform wind temperature and wind speed in the radial direction can make the hair in the action area be heated evenly, and will not be blown messy, and the hair has better smoothness after being blown dry.

[0033] like Figure 1 , Figure 4 and Figure 5In some embodiments shown, the stem assembly 11 includes a first thermal insulation sleeve 112 and two end covers 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 part of the outer wall of the stem 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.

[0034] The two end caps 113 are formed of insulating material and are respectively mounted at the two ends of the first thermal insulation sleeve 112. Each support sheet 12 is mounted to the end caps 113. The end caps 113 themselves are used to be mounted with the support sheet 12 and related electrical structures (such as wires 14, contacts, terminals, etc.), and they need to be insulated to avoid short circuits with the electrical structures.

[0035] The heating wire is wrapped around the area of ​​the support sheet 12 corresponding to the first insulation sleeve 112 to form a heater 13. It can also be understood 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.

[0036] 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 a higher temperature and only transfer less heat to the end cover 113. In other words, during the operation of the heating assembly 10, the temperature of the end cover 113 is lower than the temperature of the first thermal insulation sleeve 112, which can reduce the heat resistance requirements of the end cover 113.

[0037] 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 stem assembly 11, the middle part thereof is formed of a material with better heat resistance to form a first heat insulating sleeve 112, which is used to support the overall shape of the stem assembly 11 and isolate heat transfer; the end caps 113 are formed of a material that is easy to form at both ends, which are used to install multiple support sheets 12. In this way, the stem assembly 11 as a whole can take into account both heat resistance and easy assembly without increasing costs.

[0038] In such Figure 2In some embodiments shown, at least one support sheet 12a among the plurality of support sheets 12 has a mounting portion 121, the mounting position of the support sheet 12 corresponds to the groove 114, and the mounting portion 121 is at least partially located inside the groove 114. The fuse 15 is mounted on the mounting portion 121 of the support sheet 12a. It can also be understood that the shape of at least one support sheet 12a is different from that of the other support sheets 12, and it has a mounting portion 121 that protrudes radially inward, and can only be installed at a position corresponding to the groove 114 on the stem assembly 11. If the support sheet 12a is installed at other positions, it will interfere with the surface of the stem assembly 11.

[0039] In combination with some of the aforementioned embodiments, the relevant electrical structures of the heating assembly 10 are at least partially mounted on the support sheet 12, so mounting the fuse 15 on the support sheet 12 can simultaneously achieve structural mounting and electrical connection of the fuse 15. For example, the pins of the fuse 15 are fixed to the mounting portion 121 of the support sheet 12 by means of metal rivets, soldering, screws, etc., and the relevant electrical structures are connected to the metal rivets, soldering, screws, etc., thereby achieving structural mounting and electrical connection of the fuse 15 at the same time.

[0040] In other embodiments not shown, all support sheets 12 have the same shape and structure. The fuse 15 has a bent pin that can extend from the groove 114 and connect to the support sheet 12 corresponding to the groove 114, thereby achieving structural installation and electrical connection. In this way, the difficulty of assembling the support sheet 12 can be reduced, so that when it is assembled to the stem assembly 11, there is no need to pay special attention to the assembly position.

[0041] 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.

[0042] In such Figure 2 , Figure 3 and Figure 5 In some specific embodiments shown, a plurality of slots 1131 corresponding to the support sheet 12 are provided on the end cover 113. The support sheet 12 can be inserted into the slots 1131 to form an interference fit, thereby achieving mutual installation with the end cover 113. In other embodiments, the installation between the support sheet 12 and the end cover 113 can also be achieved by bolts, welding, gluing, clamping, etc.

[0043] Among the multiple slots 1131 on the end cover 113, there is at least one slot 1131a that passes through the groove 114 and forms a wire hole. As can be seen from the above, the fuse 15 is located in the groove 114, and the fuse 15 needs to be connected to the circuit of the heating component 10, so it must be connected to the relevant electrical structure. In the above embodiment, the electrical structure includes a wire 14, and the wire 14 can pass through the wire hole of the slot 1131a into the groove 114 and be connected to the fuse 15.

[0044] In some specific embodiments, the fuse 15 itself is mounted on the support sheet 12, and the wire 14 is also fixed on the support sheet 12. The support sheet 12a is installed in the slot 1131a forming the wire hole, and the wire 14 can pass through the wire hole along the support sheet 12a and connect to the fuse 15. Fixing the wire 14 on the support sheet 12 can keep the wire 14 at a preset position at all times, so as to prevent the wire 14 from being affected by the airflow and being displaced and then contacting the heater 13 to form a short circuit or being burned by the high temperature of the heater 13.

[0045] 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, so that the wire 14 can pass through the stem assembly 11 along the axis and connect to the corresponding position. The wire 14 located inside the stem assembly 11 will not come into contact with the hot air flow, so it can be prevented from being melted and damaged in a high temperature environment.

[0046] In other embodiments not shown, all the 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 be connected to the fuse 15 .

[0047] As described above, the first heat insulating sleeve 112 is a hollow cylindrical structure and has a notch 1121, so the first heat insulating sleeve 112 has a low strength, which in turn makes the overall strength of the stem assembly 11 low. During the assembly and use of the heating assembly 11, the insufficient strength of the stem assembly 11 will easily cause deformation, thereby causing the position of the support sheet 12 to change, which in turn causes the heating wires of the heater 13 to contact each other and short-circuit.

[0048] In order to enhance the overall strength of the stem assembly 11, Figure 4 and Figure 5In some of the embodiments shown, the stem assembly 11 further includes a base 111. The base 111 extends axially and is respectively mounted at both ends to corresponding end covers 113, and the base 111 is provided with the groove 114. The first thermal insulation sleeve 112 is sleeved and mounted outside the base 111. The base 111 is located in the radial middle of the stem 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 stem assembly 11 as a whole has relatively high strength, and deformation of the stem assembly 11 is avoided.

[0049] 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.

[0050] In some specific embodiments, the first thermal insulation sleeve 112 is formed of mica material. Mica is a rock-forming mineral with a hexagonal flaky crystal shape. It is one of the main rock-forming minerals and has the characteristics of insulation and high temperature resistance. Mica crystals have a layered structure inside, so they are flaky crystals and are easy to process into a thin sheet structure. In some specific embodiments, the aforementioned support sheet 12 is also formed of mica material.

[0051] In some specific embodiments, the base 111 is formed of a metal material, such as steel, aluminum, copper, and various alloy materials. Metal materials generally have good strength and can be easily processed and formed by casting, CNC machine tool cutting, etc. Although metal materials may have a high thermal conductivity, according to the above content, the first thermal insulation sleeve 112 isolates heat between the heater 13 and the base 111, so that the temperature rise of the base 111 itself is small, and high temperature will not be transferred to the end cover 113.

[0052] In some specific embodiments, each end cap 113 is formed of plastic. Plastic itself is easy to process and can be formed into a structure with a certain complexity through various methods such as injection molding, extrusion molding, compression molding, thermoforming, 3D printing, etc., for installation of the adaptor base 111, the first heat insulation sleeve 112 and the plurality of support sheets 12.

[0053] In some specific embodiments, such as Figure 5As shown, the base 111 has a mounting hole 1111 that penetrates in the axial direction, and each end cover 113 is mounted on the base 111 through the mounting hole 1111, thereby realizing the installation between the base 111 and the end cover 113. In some more specific embodiments, a stud is formed on the end cover 113, which can be screwed into the mounting hole 1111 for mutual installation. In some more specific embodiments, a through hole is provided at a position corresponding to the mounting hole 1111 on the end cover 113, and a screw, a rivet, etc. are passed through the through hole on the end cover 113 and inserted into the mounting hole 1111 for fixing, thereby realizing the installation between the base 111 and the end cover 113. In some more specific embodiments, a through hole is provided at a position corresponding to the mounting hole 1111 on the end cover 113, and the mounting hole 1111 can be exposed from the through hole, and other parts of the drying device 100, such as the housing, 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.

[0054] In some embodiments, the surface color of the fuse 15 is configured to have a high absorption rate for the heat radiation of 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 by 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 speed 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 is overheated.

[0055] For example, the maximum threshold of the temperature of the heater 13 is C1, and the melting temperature of the fuse 15 is C2. When the heater 13 fails and causes overheating, the airflow temperature is heated to C1 after t1 time, and after t2 time, the airflow heats the fuse 15 to the temperature C2 and melts, and the melting delay time of the fuse 15 is (t1+t2). It can also be understood that the heater 13 continues to run for (t1+t2) time after the failure and causes overheating before the power is cut off. If the fuse 15 in the above embodiment is used, when the heater 13 fails and causes overheating, the fuse 15 absorbs heat from the heated airflow and the thermal radiation emitted by the heater 13 at the same time, and the time it takes to reach the temperature C2 is t3, and t3 must be less than (t1+t2). That is, the fuse 15 can cut off the power supply at a faster speed after the heater 13 overheats, so that the time it runs in the overheating state is shorter, thereby further reducing the dangers of airflow overheating and structural overheating caused by the heater 13 running in the overheating state.

[0056] In some embodiments, the surface color of the end cap 113 is configured to have a low absorptivity for thermal radiation. For example, the surface color of the end cap 113 is white, bright silver, light gray, etc. The end cap 113 should be avoided from being heated by the heater 13 as much as possible. Configuring its surface color to have a low absorptivity for thermal radiation can reduce the amount of heat absorbed by the end cap 113 from the heater 13 in the form of thermal radiation, thereby reducing the temperature rise of the end cap 113 and also reducing the heat resistance requirements for the end cap 113.

[0057] In such Figure 6 In the drying device 100 provided in some embodiments shown, the motor 31 outputs an annular airflow during operation. The annular airflow can be understood as follows: on a plane perpendicular to the axis of the airflow, the wind speed of the airflow in the radial center area is low or even zero, and the wind speed in the annular area at the edge is high. The inner diameter of the annular area is referred to as the inner diameter of the annular airflow, and the outer diameter of the annular area is referred to as the outer diameter of the annular airflow.

[0058] An annular air duct is formed between the stem assembly 11 and the airflow channel 20. In addition, the outer diameter of the stem assembly 11 is less than or equal to the inner diameter of the annular airflow. Therefore, the stem 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.

[0059] In some specific embodiments, such as Figure 6As shown, the motor 31 includes a housing and a rotor assembly. The housing has an inner wall 313 and an outer wall 311, and an annular cavity 312 is formed between the inner wall 313 and the outer wall 311. The rotor assembly includes a rotating shaft rotatably mounted on the inner wall 313 and a propeller 314 mounted on the rotating shaft. When the propeller 314 rotates, an annular airflow is formed in the annular cavity 312 and outputted outward.

[0060] According to aerodynamics, the propeller 314 does work on the air when rotating 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 diffuse rapidly 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.

[0061] Accordingly, the outer diameter of the stem assembly 11 is less than or equal to the outer diameter of the inner wall 313, that is, less than or equal to the inner diameter of the annular airflow. In this way, the stem assembly 11 is in an area with lower wind speed in the airflow, the wind resistance formed is smaller, and the impact on the smoothness and wind noise of the airflow is also smaller. The inner diameter of the airflow channel 20 is greater than or equal to the inner diameter of the outer wall 311, and the airflow will not be affected by additional wind resistance at the connection between the airflow channel 20 and the airflow assembly 30.

[0062] exist Figure 7 The figure 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 have 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 has undergone 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 of the airflow during the propagation process will result in energy loss. Therefore, the hair dryer 200 has a low energy utilization rate for the heating process of the airflow.

[0063] according to Figure 6As can be seen from the above content, the drying device 100 in the present application has a smaller airflow channel 20, and the flow cross section formed by the airflow channel 20 and the stem 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, so the heating process of the airflow by the heating assembly 10 has a higher energy utilization rate. It can also be understood that, under the premise of inputting the same energy, the drying device 100 in the present application can output an airflow with a higher temperature; or, under the premise of outputting the same temperature airflow, the drying device 100 in the present application consumes less energy.

[0064] exist Figure 6 In some embodiments shown, the airflow assembly 30 further includes a mounting seat 32, and the motor 31 is mounted inside the mounting seat 32. The mounting seat 32 is fixed inside the drying device 100. The mounting seat 32 can be mounted on a housing or other structure of the drying device 100, and its specific mounting method is not the focus of this application.

[0065] In some specific embodiments, the airflow channel 20 is mounted at one end of the mounting seat 32 and is closely adjacent to the downstream end of the motor 31. The airflow generated by the motor 31 during operation can directly enter the airflow channel 20 without leaking between the mounting seat 32 and the airflow channel 20.

[0066] 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 it is running contacts the heating assembly 10 immediately after flowing out of the motor 31, maximizing the contact area between the heating assembly 10 and the airflow within a limited axial space to increase the heating efficiency of the airflow as much as possible.

[0067] In some specific embodiments, the airflow channel 20 and the heating component 10 are both mounted on the mounting base 32. The mounting base 32 can simultaneously fix the motor 31, the airflow 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 airflow channel 20 and the heating component 10 on the mounting base 32 can ensure sufficient fixing strength between the motor 31, the airflow channel 20, and the heating component 10, and when the motor 31 vibrates, the relative position relationship of the three will not be affected, so that the airflow can always flow along the preset path and be heated.

[0068] In some specific embodiments, the drying device 100 further includes a sealing ring (not shown) installed between the mounting seat 32 and the airflow channel 20, and the sealing ring can be extended and retracted along the axial direction of the airflow component 30. The sealing ring is used to seal between the mounting seat 32 and the airflow channel 20 to ensure that all the airflow formed by the motor 31 enters the airflow channel 20.

[0069] The motor 31 does work on the airflow during operation, 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. Especially 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 move 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 starting, 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 is accelerated or decelerated, the reaction force it receives will change and displace accordingly, 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.

[0070] In such Figure 8 In some specific embodiments shown, the motor 31 has an adapter plate 315 for connecting to an external circuit to send a control signal and / or power input 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 part 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 above contents, it can be seen that the support sheet 12 in the heating assembly 10 itself also extends along the radial direction of the airflow, which will also affect the airflow.

[0071] 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 impact of the heating component 10 and the airflow component 30 on the airflow as a whole.

[0072] In some embodiments not shown, a plurality of guide vanes are further provided in the annular cavity 312 of the motor 31 for guiding the airflow in the annular cavity 312. On any plane perpendicular to the airflow direction, 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 influence 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 to the guide vanes one by one, so that all support sheets 12 are blocked by the corresponding guide vanes, which can reduce the influence of the support sheets 12 on the airflow on the one hand, and on the other hand, it is equivalent to extending the length of the guide vanes in the airflow direction, increasing the guiding property of the airflow, so that the airflow output by the drying device 100 has better smoothness.

[0073] like Figure 6 As shown, 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 installed on the stem assembly 11. The air guide grille 21 can guide the outflowing air flow to reduce the turbulence generated when the air flow passes through the heating assembly 10. In addition, the air guide grille 21 also forms a partition between the heating assembly 10 and the external environment to prevent foreign objects such as fingers, cloth, hair, and paper from entering the air flow channel 20 from the air outlet and contacting the heating assembly 10, thereby preventing the risk of overheating.

[0074] In some embodiments, Figure 6 As shown, the drying device 100 also includes a radiation component 40 capable of outputting infrared radiation. The radiation component 40 is annular, and the airflow channel 20 is installed on the inner edge of the annular shape of the radiation component 40. As can be seen from the foregoing content, the drying device 100 itself can output normal temperature airflow or hot airflow, and the infrared radiation output by the radiation component 40 and the airflow act together on the object to be dried. Infrared radiation will not bake the object to be dried at high temperature, so it can avoid damage to the object to be dried caused by high temperature baking while increasing the drying efficiency.

[0075] As can be seen from the above, the heating assembly 10 used in the present application can be adapted to a smaller airflow channel 20. Therefore, a larger area on the end surface of the drying device 100 can be designed to output infrared radiation to the outside (hereinafter referred to as the light-emitting portion), and a smaller area can be designed as an air outlet for outputting airflow to the outside. This allows the drying device 100 to output sufficient infrared radiation without significantly increasing its size.

[0076] In addition, compared with infrared radiation, airflow is more likely to diffuse on the transmission path. In order to enable airflow and infrared radiation to act on a roughly overlapping area at a preset distance, so as to achieve simultaneous drying of the area by infrared radiation and airflow, it is necessary to control the diffusion of airflow as much as possible. In the above embodiment, the size of the air outlet of the drying device 100 is small, and the size of the light outlet is large. At the preset distance, the airflow that has been diffused to a greater extent just overlaps with the infrared radiation that has been diffused to a lesser extent, and acts together on the target area of ​​the object to be dried.

[0077] In some specific embodiments, the airflow channel includes a second thermal insulation sleeve 20 formed of a heat-resistant and / or low thermal conductivity material. The heating assembly 10 is located in the second thermal insulation sleeve 20 and the two are kept coaxial. An annular space with uniform radial size is formed between the stem assembly 11 and the second thermal insulation sleeve 20 to allow the annular airflow output by the electric motor 31 to pass through.

[0078] The second heat-insulating sleeve 20 and the first heat-insulating sleeve 112 can be made of the same or different materials, and both have the function of isolating heat. More specifically, the second heat-insulating sleeve 20 can isolate the heat transfer between the heating component 10 and the radiation component 40, thereby preventing the heat emitted by the heating component 10 from heating the radiation component 40 during operation.

[0079] In summary, in combination with the aforementioned multiple embodiments, multiple parts in the drying device 100 are coupled to 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 assembly 10, so that the air flow channel 20 can be designed to be smaller in size while ensuring that the fuse 15 is at a sufficient distance from 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 setting 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.

[0080] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" etc. means that the specific features, structures, orientations, positions, materials or characteristics described in conjunction with the embodiments or examples 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 contradictory.

[0081] 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 assembly installed in the air flow channel of a drying device; characterized in that: include: A stem assembly, wherein the outer wall of the stem assembly is provided with a groove; A plurality of support sheets, each of which is mounted on the stem assembly and extends radially along the airflow channel; A heater, the heater surrounding the outer edges of the plurality of support sheets; A fuse 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 assembly according to claim 1, characterized in that The stem assembly comprises: a first thermal insulation sleeve, wherein the outer wall of the first thermal insulation sleeve constitutes a part of the outer wall of the stem assembly, the first thermal insulation sleeve is provided with a notch corresponding to the groove, and the first thermal insulation sleeve is formed of a heat-resistant and / or low thermal conductivity material; Two end covers, the two end covers are respectively mounted on two ends of the first thermal insulation sleeve, and the end covers are formed of insulating material; Furthermore, each of the supporting sheets is mounted on the end cover.

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

4. The heating assembly according to claim 2, characterized in that: The end cover is formed with a plurality of slots into which the support sheet can be inserted and installed, and at least one slot passes through the groove and forms a wire hole through which the wire of the fuse can pass.

5. The heating assembly according to claim 2, characterized in that: The stem assembly further comprises a base, which extends axially and has two ends respectively mounted to the corresponding end covers, and the base is provided with the groove; The first heat-insulating sleeve is installed outside the base.

6. The heating assembly according to claim 5, characterized in that The first heat-insulating sleeve is formed of mica material, the base is formed of metal material, and each of the end covers is formed of plastic.

7. The heating assembly according to claim 5, characterized in that The base has a mounting hole which penetrates in the axial direction, and each of the end covers is mounted on the base through the mounting hole.

8. The heating assembly according to any one of claims 1 to 7, characterized in that: The surface color of the fuse is configured to have a high absorptivity to heat radiation.

9. The heating assembly 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 absorptivity to heat radiation.

10. The heating assembly according to any one of claims 1 to 7, characterized in that: Also included are a plurality of connecting wires, which are used to connect to an external circuit, wherein at least one of the connecting wires passes through the interior of the stem assembly.

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

12. A drying device, characterized in that: include: an airflow assembly, the airflow assembly comprising a motor for generating an airflow; an air flow channel connected downstream of the air flow component; A heating assembly as claimed in any one of claims 1 to 11.

13. The drying device according to claim 12, characterized in that: The axes of the airflow channel, the airflow component, and the stem component all coincide with each other.

14. The drying device according to claim 12, characterized in that: The motor is capable of outputting annular airflow when in operation; and, The outer diameter of the stem assembly is less than or equal to the inner diameter of the annular airflow; The inner diameter of the airflow channel is greater than or equal to the outer diameter of the annular airflow.

15. The drying device according to claim 12, characterized in that: The motor comprises a housing and a rotor assembly, wherein 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 comprises a rotating shaft rotatably mounted on the inner wall and a propeller mounted on the rotating shaft, and an annular airflow is formed in the annular cavity when the propeller rotates; and, The outer diameter of the stem 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, characterized in that The motor comprises an adapter plate for providing a control signal and / or a power input, wherein one end of the adapter plate is connected to the rotor assembly, and the other end of the adapter plate radially spans the annular cavity and extends to the outside of the housing; and, On any plane perpendicular to the airflow direction, the projection pattern formed by at least one of the support sheets and the projection pattern formed by the adapter plate at least partially overlap.

17. The drying device according to any one of claims 12 to 16, characterized in that: The airflow assembly also includes a mounting seat, and the motor is mounted inside the mounting seat; The air flow channel and / or the heating assembly are mounted on one end of the mounting base and are closely adjacent to the downstream end of the motor.

18. The drying device according to claim 17, characterized in that It also includes a sealing ring that can be expanded and contracted along the axial direction of the airflow component, and the sealing ring seals between the mounting seat and the airflow channel.

19. The drying device according to any one of claims 12 to 16, characterized in that: An air outlet is formed at the downstream end of the air flow channel, and an air guide grille is provided at the air outlet. The air guide grille is installed on the core column assembly.

20. The drying device according to any one of claims 12 to 16, characterized in that: It also includes a radiation component capable of outputting infrared radiation, the radiation component is annular, and the airflow channel is installed on the inner edge of the annular shape of the radiation component.

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

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