Drying equipment

Abstract

A drying device, comprising: a housing, a motor, and a plurality of radiation sources. A wind channel is provided in the housing. The motor is located in the housing and is used to generate an air flow in the wind channel. The plurality of radiation sources are housed in the housing and are used to generate infrared radiation and direct the infrared radiation to the outside of the housing. Wherein, the radiation source includes a reflector cup, and a clearance portion is formed on the wall of the reflector cup, and the shape of the clearance portion is adapted to the wind channel and / or the housing.

Description

[0001] Priority Information

[0002] This application claims the priority and rights of the patent application with the patent application number PCT / CN2020 / 089408 filed with the China National Intellectual Property Administration on May 9, 2020, the priority and rights of the patent application with the patent application number PCT / CN2020 / 095146 filed with the China National Intellectual Property Administration on June 9, 2020, and the priority and rights of the patent application with the patent application number PCT / CN2021 / 082835 filed with the China National Intellectual Property Administration on March 24, 2021, and incorporates the entire text thereof herein by reference. Technical Field

[0003] This application relates to the field of drying technology, and particularly relates to a drying device. Background Art

[0004] Currently, there is already a hair dryer that can emit infrared radiation for drying hair, and the hair dryer has a radiation source for emitting infrared radiation. In order to provide an appropriate amount of radiation, it is necessary to consider the number of radiation sources and the positional relationship between them. By increasing the number of radiation sources, the size of a single reflector cup can be reduced to improve the overall space utilization rate.

[0005] However, due to the limitations of various radiation source processes (such as the filament size in a light bulb), if the size of the reflector cup relative to the radiation source is too small, the radiation efficiency will be severely attenuated. In a given product shape, using a large reflector cup may exceed the shape limit. Summary of the Invention

[0006] An embodiment of this application provides a drying device.

[0007] A drying device according to an embodiment of this application includes:

[0008] A housing, within which there is provided an air duct;

[0009] A motor, located in the housing and configured to generate an air flow in the air duct;

[0010] A plurality of radiation sources, accommodated in the housing and configured to generate infrared radiation and direct the infrared radiation outside the housing,

[0011] wherein, the radiation source includes a reflector cup, and a clearance portion is formed on the wall of the reflector cup, and the shape of the clearance portion is adapted to the air duct and / or the housing.

[0012] In the above drying device, the clearance part can be a part formed on the outer wall of the reflector cup to adapt to the shape of the air duct and / or the housing. In this way, when the reflector cup is coupled with the air duct and / or the housing, the overall size after assembly can be reduced without affecting the outer shape of the air duct and / or the housing. Moreover, by cutting the wall of the reflector cup that intrudes into the air duct to adapt to the shape of the air duct, the influence on the air can be reduced, and the diameter of the air duct will be larger than that of the traditional one under the given housing size.

[0013] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0015] Figure 1 is a schematic structural diagram of the drying device according to an embodiment of the present application;

[0016] Figure 2 is a partial schematic structural diagram of the drying device according to an embodiment of the present application;

[0017] Figure 3 is another partial schematic structural diagram of the drying device according to an embodiment of the present application;

[0018] Figure 4 is a schematic cross-sectional diagram of the drying device according to an embodiment of the present application;

[0019] Figure 5 A-5D is a schematic diagram of the relationship between the radiation source and the air duct of the drying device according to an embodiment of the present application;

[0020] Figure 6 is another partial schematic structural diagram of the drying device according to an embodiment of the present application;

[0021] Figure 7 A-7D is another schematic diagram of the relationship between the radiation source and the air duct of the drying device according to an embodiment of the present application;

[0022] Figure 8 is yet another partial schematic structural diagram of the drying device according to an embodiment of the present application;

[0023] Figure 9 A-9D is yet another schematic diagram of the relationship between the radiation source and the air duct of the drying device according to an embodiment of the present application.

[0024] Figure 10 is still another partial schematic structural diagram of the drying device according to an embodiment of the present application;

[0025] Figure 11A-11D is another schematic diagram of the relationship between the radiation source and the air duct of the drying equipment according to the embodiment of the present application;

[0026] Figure 12 is another partial structural schematic diagram of the drying equipment according to the embodiment of the present application;

[0027] Figure 13 A-13D is another schematic diagram of the relationship between the radiation source and the air duct of the drying equipment according to the embodiment of the present application;

[0028] Figure 14 is another partial structural schematic diagram of the drying equipment according to the embodiment of the present application;

[0029] Figure 15 A-15B is another schematic diagram of the relationship between the radiation source and the air duct of the drying equipment according to the embodiment of the present application;

[0030] Figure 16 is another partial structural schematic diagram of the drying equipment according to the embodiment of the present application;

[0031] Figure 17 is a three-dimensional schematic diagram of a part of the structure of the drying equipment according to the embodiment of the present application;

[0032] Figure 18 is a three-dimensional schematic diagram of the radiation source of the drying equipment according to the embodiment of the present application;

[0033] Figure 19 is a structural schematic diagram of the light-emitting component of the drying equipment according to the embodiment of the present application;

[0034] Figure 20 is a schematic diagram of the relationship between the radiation source and the air duct of the drying equipment according to the embodiment of the present application;

[0035] Figure 21 is a cross-sectional schematic diagram of the radiation source and the air duct of the drying equipment according to the embodiment of the present application;

[0036] Figure 22 is a schematic diagram of the parameter comparison of the radiation source of the drying equipment according to the embodiment of the present application;

[0037] Figure 23 is a schematic diagram of the relationship between the radiation source and the air duct of the drying equipment according to the embodiment of the present application;

[0038] Figure 24 is a cross-sectional schematic diagram of the radiation source and the air duct of the drying equipment according to the embodiment of the present application;

[0039] Figure 25 is a schematic diagram of the relationship between the radiation source and the air duct of the drying equipment according to the embodiment of the present application;

[0040] Figure 26It is a schematic cross-sectional view of the radiation source and the air duct of the drying device according to an embodiment of the present application;

[0041] Figure 27 It is a schematic diagram showing the relationship between the radiation source and the air duct of the drying device according to an embodiment of the present application;

[0042] Figure 28 It is a schematic cross-sectional view of the radiation source and the air duct of the drying device according to an embodiment of the present application;

[0043] Figure 29 It is a schematic cross-sectional view of the light-emitting element of the drying device according to an embodiment of the present application;

[0044] Figure 30 It is another schematic cross-sectional view of the light-emitting element of the drying device according to an embodiment of the present application;

[0045] Figure 31 It is still another schematic cross-sectional view of the light-emitting element of the drying device according to an embodiment of the present application;

[0046] Figure 32 A-32B is a schematic diagram showing the relationship between the radiation source and the optical element according to an embodiment of the present application. Specific Embodiments

[0047] The following describes in detail the embodiments of the present application. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for explaining the present application and should not be construed as limiting the present application.

[0048] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They 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 thus should not be construed as limiting the present application. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0049] In the description of the present application, it should be noted that, unless otherwise clearly specified or limited, the terms "installed", "connected", and "coupled" shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection. It may be a mechanical connection or an electrical connection. It may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0050] In the present application, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0051] The present disclosure provides many different embodiments or examples for implementing different structures of the present application. 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 numerals and / or reference letters in different examples. Such repetition is for the purpose of simplification and clarity, and does not 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 may be aware of the application of other processes and / or the use of other materials.

[0052] An embodiment of the present application provides a drying device. The drying device of the present application can remove water and moisture from an object (such as hair, fabric) by using an infrared (IR) radiation source as a heat energy source. The infrared radiation source can emit infrared energy with a preset wavelength range and power density to heat the object. The heat carried by the infrared energy is directly transferred to the object in a radiative heat transfer manner, so that the heat transfer efficiency is improved compared with the traditional convective heat transfer manner (for example, basically no heat is absorbed by the surrounding air in the radiative heat transfer manner, while a large part of the heat is absorbed by the surrounding air and carried away in the traditional convective heat transfer manner). The infrared radiation source can be used in combination with a motor, and the airflow generated by the motor further accelerates the evaporation of water from the object.

[0053] Another advantage of using infrared radiation as a heat source is that infrared heat can penetrate the hair shaft until the cuticle layer of the hair cuticle, thus drying the hair faster and making the hair loose and soft. Infrared energy is also considered beneficial to scalp health and stimulates hair growth by increasing blood flow to the scalp. The use of an infrared radiation source can also make the drying device compact and portable. The improvement of the heat transfer efficiency and energy efficiency of the infrared radiation source can also extend the operating time of a wireless drying device powered by an embedded battery.

[0054] Please refer Figure 1 As shown, a drying device 100 provided by an embodiment of the present application may include a housing 10, a motor 20, and a radiation source 30. An air duct 40 is provided inside the housing 10. The housing 10 can accommodate various electrical, mechanical, and electromechanical components, such as the motor 20, the radiation source 30, a control board (not shown), and a power adapter (not shown), etc.

[0055] The housing 10 may include a main body 102 and a handle 104, and each of the main body 102 and the handle 104 may accommodate at least a part of electrical, mechanical, and electromechanical components therein. In some embodiments, the main body 102 and the handle 104 may be integrally connected. In some embodiments, the main body 102 and the handle 104 may be separate components. For example, the handle 104 may be detachable from the main body 102. In one example, the detachable handle 104 may accommodate a power source (such as one or more batteries) for powering the drying device 100 therein. The housing 10 may be made of an electrically insulating material. Examples of the electrically insulating material may include polyvinyl chloride (PVC), polyethylene terephthalate (PET), acrylonitrile-butadiene-styrene copolymer (ABS), polyester, polyolefin, polystyrene, polyurethane, thermoplastic, silicone, glass, glass fiber, resin, rubber, ceramic, nylon, and wood. The housing 10 may also be made of a metal material coated with an electrically insulating material, or made of a combination of an electrically insulating material and a metal material coated or not coated with an electrically insulating material. For example, the electrically insulating material may form the inner layer of the housing 10, while the metal material may form the outer layer of the housing 10. In one example, an input component 106 is further provided on the handle 104, and the input component 106 can be used for a user to operate the drying device, such as turning on / off the drying device, adjusting the motor speed, the power of the radiation source, etc. The input component 106 may include at least one of a physical button, a virtual button, and a touch screen. In other embodiments, the drying device may also omit the input component, and the drying device may be controlled by a terminal communicating with the drying device, and the terminal may include, but is not limited to, a mobile phone, a tablet computer, a wearable intelligent device, a personal computer, etc.

[0056] The housing 10 can be provided with one or more air ducts 40 inside. The air ducts 40 can be fixed within the housing 10 so that the airflow generated by the motor 20 can flow stably, avoiding unexpected airflow disturbances. The airflow generated by the motor 20 can be guided or adjusted through the air duct and towards the user's hair. For example, the air duct 40 can be shaped to at least adjust the velocity, throughput, divergence angle, or vortex intensity of the airflow leaving the drying device 100. The air duct 40 can include an air inlet 402 and an air outlet 404. In one example, the air inlet 402 and the air outlet 404 can be placed at opposite ends of the drying device 100 along the longitudinal direction of the drying device 100 (such as the length direction of the main body 102). The air inlet 402 and the air outlet 404 can each be a vent that allows an effective airflow throughput. Ambient air can be drawn into the air duct 40 through the air inlet 402 to generate an airflow, and the generated airflow can leave the air duct 40 through the air outlet 404. The motor 20 can be located within the air duct 40 of the main body 102 or within the air duct 40 of the handle 104, and no specific limitation is made here. The air inlet 402 can also be provided on the handle 104, or on both the handle 104 and the main body 102.

[0057] The cross-sectional shape of the air outlet 404 can be any shape, preferably circular, oval, rectangular (square), or various variants of circular and quadrilateral shapes, such as a quadrilateral with rounded corners. No specific limitation is made here.

[0058] In one example, one air duct 40 is provided within the main body 102, and the air duct 40 is substantially cylindrical. It can be understood that in other embodiments, the air duct 40 can also be in other shapes, such as a funnel shape, a Y shape, and various regular or irregular shapes, and no specific limitation is made here.

[0059] In one embodiment, one or more air filters (not shown in the figure) can be provided at the air inlet 402 to prevent dust or hair from entering the air duct 40. For example, the air filter can be a mesh with an appropriate mesh size. The air filter can be detachable or replaceable for cleaning and maintenance. In one embodiment, an air flow regulator (not shown in the figure) can be provided at the air outlet 404. The air flow regulator can be a detachable nozzle, comb, or curler. The air flow regulator can be configured to adjust the velocity, throughput, divergence angle, or vortex intensity of the airflow blown out from the air outlet 404. For example, the air flow regulator can be shaped to converge (e.g., concentrate) the airflow at a preset distance in front of the air outlet 404. For example, the air flow regulator can be shaped to diverge the airflow leaving the air outlet 404.

[0060] In one embodiment, since the radiation source 30 for generating infrared radiation is provided inside the housing 10, there may be no additional heating device in the housing 10. On the one hand, the radiation power of the radiation source 30 can be adjusted to achieve the desired drying effect. On the other hand, the absence of an additional heating device can also miniaturize the drying device 100, thereby enhancing the portability of the drying device 100. The absence of an additional heating device can also result in lower energy consumption of the drying device 100, which can increase the battery life of the drying device 100. In some embodiments, the heating device includes an electric heating wire (such as a resistance wire).

[0061] In one embodiment, the motor 20 is located in the housing 10 and is used to generate an air flow in the air duct 40. In one example, the motor 20 can be disposed inside the air duct 40 of the main body 102 and near the air flow inlet 402. The motor 20 can include a driving portion 202 and an impeller 204. The impeller 204 can include a plurality of fan blades. When the impeller 204 is driven by the driving portion 202, the rotation of the impeller 204 can send ambient air into the air duct 40 through the air flow inlet 402 to generate an air flow, push the generated air flow through the air duct 40, and discharge the air flow from the air flow outlet 404. The driving portion 202 can be supported by a bracket or accommodated in a shroud. The motor 20 can include a brushless motor 20, and the rotation speed of the impeller 204 can be adjusted under the control of a controller (not shown). For example, the rotation speed of the impeller 204 can be controlled by a preset program, user input, or sensor data. In some embodiments, the size of the driving portion 202 measured in any direction can be in the range between 14 mm (millimeters) and 21 mm. The power output of the motor 20 can be in the range of 35 to 80 watts (W). The maximum speed of the air flow leaving the air flow outlet 404 can be at least 8 meters per second (m / s).

[0062] In Figure 1 and Figure 2 FIG. shows the motor 20 disposed in the main body 102. It can be understood that in other embodiments, the motor 20 can also be disposed in the handle 104. For example, the rotation of the impeller 204 can draw air into the air flow inlet 402 provided at the handle 104 and push the air through the air duct 40 to the air flow outlet 404 provided at one end of the main body 102. The air duct 40 can accordingly extend through the handle 104 and the main body 102 of the housing 10.

[0063] In one embodiment, the passing frequency of the fan blades of the motor 20 is close to the frequency range of ultrasonic waves. The passing frequency of the fan blades can be expressed as the product of the rotational speed of the motor and the number of fan blades of the motor 20. That the passing frequency of the fan blades of the motor 20 is close to the frequency range of ultrasonic waves can be understood as that the passing frequency of the fan blades is within the frequency range of ultrasonic waves, or the passing frequency of the fan blades is the upper or lower limit of the frequency range of ultrasonic waves, or the difference between the passing frequency of the fan blades and the upper or lower limit of the frequency range of ultrasonic waves is less than a preset value. In one example, the rotational speed unit of the motor 20 is rps (revolutions per second), and the passing frequency of the fan blades is greater than or equal to 15 KHz.

[0064] In one embodiment, the number of fan blades of the motor 20 is a prime number greater than 5.

[0065] In Figure 1 In the example of , a part of the radiation source 30 is located outside the air duct 40, and the other part can exchange heat with the air duct 40. For example, the radiation source 30 may include a reflector cup 302. A part of the outer wall of the reflector cup 302 (such as the windward surface) is located outside the air duct 40, and this part is not blown by the air flow in the air duct 40. Therefore, the heat exchange amount between this part and the air duct 40 is small. On the one hand, it can appropriately dissipate heat from the radiation source 30. On the other hand, it can also keep the radiation source 30 at a suitable working temperature during operation, and can improve the evaporation efficiency of the water on the object.

[0066] In one embodiment, the rotational speed of the motor 20 is greater than or equal to 50,000 rpm (revolutions per minute). That is to say, the rotational speed of the motor is at least 50,000 revolutions per minute. In this way, by using the high-speed motor 20 (the rotational speed of the motor 20 is greater than or equal to 50,000 rpm), while generating sufficient air volume, it can also appropriately dissipate heat from the radiation source 30.

[0067] Specifically, in the prior art, due to the use of a low-speed motor, in order to effectively dissipate heat from a single high-power radiation source, the radiation source is usually directly placed in the air duct as a whole. For example, the entire outer wall (i.e., the entire windward surface) of the reflector cup of the radiation source is directly blown by the air flow in the air duct to take away the heat of the radiation source. However, the disadvantages of this drying device are: 1) The length of the main body along the axial direction of the air duct (such as the horizontal direction) is relatively long (large size) because a) the reflector cup of the radiation source is generally parabolic and relatively long; b) the temperature of the air flow outlet close to the radiation is extremely high, and an isolation device needs to be set to prevent scalding and accidents. 2) The shape of the radiation source in the air duct 40 (such as the outer wall shape of the reflector cup) will affect the air flow, such as generating wind resistance, wind noise, changing the direction of the air flow, etc., and ultimately wasting the energy of the air.

[0068] In the embodiments of the present application, an object will radiate in the infrared to visible wavelength range in the form of heat transfer. This heat transfer is called blackbody radiation. Blackbody radiation is broadband radiation. The central wavelength and spectral bandwidth decrease as the temperature increases. The total energy is proportional to S×T 4 where S represents the surface area and T represents the temperature. Given the operating temperature required for the blackbody radiation of the radiation source 30 and the air volume of the high-speed motor 20 (measured in Cubic per Minute / CPM), the heat dissipation efficiency can be deduced, and then the heat dissipation area required for the radiation source 30 can be deduced. This heat dissipation area is smaller than the heat dissipation area of the prior art in which the entire radiation source 30 is placed in the air duct 40. Therefore, a part of the radiation source 30 in the embodiments of the present application can be located outside the air duct 40 and is not directly blown by the air flow in the air duct 40. Even when using a high-power single radiation source 30, the radiation source 30 can be maintained at an appropriate operating temperature. At the same time, since a part of the radiation source 30 is located outside the air duct 40, the radiation source 30 can be offset along the radial direction of the air duct 40 (such as the vertical direction) in terms of structure, which can reduce the length of the main body 102, and the adverse effect of the shape of the radiation source 30 on the air flow is also reduced.

[0069] In one embodiment, the motor 20 is fixed in the housing 10 through a shock-absorbing device (not shown in the figure). In this way, the vibration generated by the motor 20 can be reduced or avoided from being transmitted to the housing 10, avoiding causing trouble to the user during use.

[0070] Specifically, the shock-absorbing device may include an elastic member. The vibration generated when the motor 20 operates can be absorbed by the elastic member, reducing the transmission of vibration.

[0071] In one embodiment, the shock-absorbing device is fixedly connected to the radiation source 30. In this way, the transmission path of the vibration generated by the motor 20 is increased, and the vibration transmitted to the housing 10 generated by the motor 20 is further reduced. Specifically, the shock-absorbing device is fixedly connected to the radiation source 30, and the radiation source 30 can be fixed in the housing 10. In this way, the formed vibration transmission path is further: motor 20 -> shock-absorbing device -> radiation source 30 -> housing 10.

[0072] In one embodiment, the shock-absorbing device includes a sleeve formed of an elastic material. The sleeve includes a clamping portion that extends around the sleeve and is flexibly coupled to at least one of the housing 10, the air duct 40, and the radiation source 30. In this way, the transmission of vibration is reduced through the flexibly coupled clamping portion.

[0073] Specifically, the sleeve can be sleeved outside the driving part 202 of the motor 20. The clamping part can be arranged on the outer surface of the sleeve. The clamping part can be formed into a plurality (two or more than two), and is evenly spaced along the circumferential direction of the sleeve to uniformly reduce vibration transmission. Of course, the clamping part can also be formed into a single one, and the single clamping part is annularly arranged on the outer surface of the sleeve.

[0074] The sleeve includes a clamping part that extends around the sleeve and is flexibly coupled to at least one of the housing 10, the air duct 40, and the radiation source 30. It can be that the sleeve includes a clamping part that extends around the sleeve and is flexibly coupled to the housing 10. It can be that the sleeve includes a clamping part that extends around the sleeve and is flexibly coupled to the air duct 40. It can be that the sleeve includes a clamping part that extends around the sleeve and is flexibly coupled to the radiation source 30. It can be that the sleeve includes a clamping part that extends around the sleeve and is flexibly coupled to the housing 10 and the air duct 40. It can also be that the sleeve includes a clamping part that extends around the sleeve and is flexibly coupled to the air duct 40 and the radiation source 30. It can be that the sleeve includes a clamping part that extends around the sleeve and is flexibly coupled to the housing 10 and the radiation source 30. It can also be that the sleeve includes a clamping part that extends around the sleeve and is flexibly coupled to the housing 10, the air duct 40, and the radiation source 30.

[0075] In one embodiment, the clamping part is a protrusion formed of a rubber material. In this way, the protrusion is convenient for connection, and the protrusion formed of the rubber material is also easy to mold, and has a better shock absorption effect.

[0076] In one embodiment, the radiation source 30 is housed in the housing 10 and is used to generate infrared radiation and direct the infrared radiation outside the housing 10. The radiation source 30 can include a first part and a second part. Among them, the first part is located outside the air duct 40, and the second part is connected to the first part and exchanges heat with the air duct 40.

[0077] The number of the radiation sources 30 can be one, or multiple (two or more than two). When the number of the radiation sources 30 is multiple, the multiple radiation sources 30 are configured such that the infrared radiation generated by the multiple radiation sources 30 forms at least one light spot at a certain distance from the air flow outlet 404 of the air duct 40. In this way, the infrared radiation intensity in the light spot area is relatively high, and the object can be effectively dried. It can be understood that a single radiation source 30 can also be configured such that the radiation from the radiation source 30 forms a light spot at a certain distance outside the opening side of the radiation source 30. In this way, the multiple radiation sources 30 are configured such that the infrared radiation generated by the multiple radiation sources 30 forms at least one light spot at a certain distance from the air flow outlet of the air duct. In this way, the infrared radiation of each radiation source 30 can be utilized to dry the target object, so that the multiple radiation sources 30 can provide a suitable radiation amount for the target object, and at the same time avoid the problem of the working temperature of a single radiation source 30 being too high.

[0078] Specifically, by adjusting the light-emitting direction of the radiation source 30, a light spot is formed by multiple radiation sources 30 at a certain distance from the air outlet of the air duct 40. The light spot can be a circular light spot, and the diameter of the circular light spot can be 10 cm. In one example, the certain distance can be 10 cm. The light spot can also be an elliptical light spot or a light spot of other shapes, which is not specifically limited herein. It can be understood that the number of light spots can also be two or more than two, which is achieved by adjusting the opening direction of the radiation source 30. For example, if the number of radiation sources 30 is 6, it can be that 6 radiation sources 30 form a light spot, or 3 radiation sources 30 form a light spot, and the other 3 radiation sources 30 form another light spot, etc. Preferably, the number of light spots is less than the number of radiation sources 30.

[0079] Furthermore, one or more radiation sources 30 can be integrally inclined to adjust the light-emitting direction (as shown in Figure 3 and Figure 4 ), or the opening direction of one or more radiation sources 30 (such as the opening of the reflector cup 302) can be adjusted to achieve the adjustment of the light-emitting direction, or the installation direction of the light-emitting component can be adjusted to achieve the adjustment of the light-emitting direction, or any combination of the above can be used to form a light spot at a certain distance from the air outlet of the air duct 40, which is not specifically limited herein.

[0080] In the embodiment of the present application, for a certain radiation illuminance, the light spot illuminating the target object (the object to be dried) has an optimal area (at the same time, there is a coupling relationship between the action area of the thermal radiation and the action area of the wind, and they should be matched as much as possible, so an optimal radiation irradiation area can be determined, for example, within a circle with a diameter of 10 cm). From this, the optimal value of the irradiation flux finally acting on the target object (radiation illuminance x irradiation area) can be calculated, and then the electric power required for various layout schemes of the radiation source 30 can be calculated through the radiation energy / electric energy conversion efficiency of the radiation source 30 radiated into the specified area, and then the number and size combination of the light-emitting components of the appropriate radiation source 30 and the size of the corresponding reflector cup 302 can be selected. Among these combinations, if a single radiation source 30 is used, since the infrared light will diverge after being emitted, the thermal radiation power density at the opening of the radiation source 30 (the opening of the reflector cup 302) is relatively high, which may cause burns in a short time, while multiple radiation sources 30 can be arranged separately (the total power of multiple radiation sources 30 is the same as the power of a single radiation source 30), and the thermal radiation power density at the opening (radiation exit) of each radiation source 30 is relatively lower and safer.

[0081] Among the multiple radiation sources 30, two adjacent radiation sources 30 can be next to each other or separated by a certain distance, which is not specifically limited herein.

[0082] In one embodiment, please refer to Figure 4, the optical axes H of multiple radiation sources 30 converge to a predetermined position away from the drying device 100. In this way, the radiation energy at the predetermined position can be made stronger, improving the drying efficiency of the target object.

[0083] Specifically, the radiation source 30 may include a reflector cup 302 and an optical element. The optical element is installed at the opening of the reflector cup 302, and the optical axis H of the radiation source 30 may be the optical axis of the optical element. The predetermined position may be a position at a certain distance from the air outlet of the air duct 40. For example, the predetermined position may be a position 10 cm away from the air outlet of the air duct 40.

[0084] In one embodiment, along the direction of air flow, the second part is located downstream of the motor 20. In this way, the heat exchange effect between the second part and the air duct 40 can be improved.

[0085] Specifically, please refer to Figure 1 , the radiation source 30 as a whole is located at a position close to the left side of the drying device 100, and the motor 20 is located at a position close to the right side of the drying device 100. When the motor 20 operates, it inhales air from the external environment on the right side of the drying device 100 and outputs a faster airflow from the left side of the motor 20, and the airflow flows towards the radiation source 30. The faster airflow can improve the heat exchange efficiency between the second part and the air duct 40.

[0086] In one embodiment, during operation, the radiation source 30 is located between the air duct 40 and the housing 10. In this way, a configuration of the drying device 100 can be achieved, as Figure 1 shown.

[0087] Specifically, during operation, it can be understood that at least one of the radiation source 30 and the motor 20 is turned on, including the radiation source 30 being turned on and the motor 20 being turned off, the radiation source 30 being turned off and the motor 20 being turned on, and the radiation source 30 being turned on and the motor 20 being turned on.

[0088] In one embodiment, the radiation source 30 can be fixed within the housing 10, that is, regardless of whether the drying device 100 is operating or not, the radiation source 30 is located between the air duct 40 and the housing 10. In one embodiment, the radiation source 30 is movably arranged within the housing 10. For example, by adding a moving structure to adjust the position of the radiation source 30, such that when the drying device 100 is operating, the radiation source 30 is driven to a position between the air duct 40 and the housing 10, and when the drying device 100 is not operating, the radiation source 30 is moved to other positions, such as into the air duct 40 or other positions within the housing 10 that are convenient for storage. In one embodiment, it can be a moving structure to adjust the position of the air duct 40, or a moving structure to adjust the positions of the air duct 40 and the radiation source 30. No specific limitation is made here.

[0089] In one embodiment, all radiation sources 30 are located outside the air duct 40. The number of radiation sources 30 may include a plurality. All radiation sources 30 are located outside the air duct 40, so that during operation, the air flow resistance generated by the air duct 40 is small, which helps to reduce wind noise and wind resistance.

[0090] Specifically, there are no radiation sources 30 in the air duct 40, which has little impact on the wind speed and air volume of the wind and will not generate additional wind noise. Wind speed and air volume have a great impact on the blowing speed. In particular, when the drying device 100 is used for drying hair, since the drying device 100 is close to the ear during the hair drying process, low noise can improve the user experience.

[0091] In one embodiment, the radiation source 30 can be arranged circumferentially around the air duct 40 near the air flow outlet 404 of the air duct 40. In this way, on the one hand, when the wind flows out from the air flow outlet 404, the heat of the radiation source 30 part is carried away by the wind, causing the wind temperature to rise by a few degrees (1 - 5 degrees). Although it is not enough to have a decisive impact on the object to be dried (such as dry hair), it improves the physical feeling of the human body when the wind blows, making people not feel the cold wind blowing, and improving the user experience. On the other hand, the infrared radiation emitted by the radiation source 30 is basically not blocked by the air duct 40, which is beneficial to improving the drying efficiency.

[0092] In one embodiment, the radiation source 30 is arranged around the air flow outlet 404 of the air duct 40. In Figure 2 、 Figure 5 In the example of A - 5D, the planar shape of the radiation source 30 along the plane perpendicular to the axial direction of the air duct 40 is circular or approximately circular. In Figure 5 In the example of A, the number of radiation sources 30 is two, and the two radiation sources 30 are arranged around the air flow outlet 404 of the air duct 40 at an interval of 180 degrees. In Figure 5 In the example of B, the number of radiation sources 30 is three, and the three radiation sources 30 are arranged around the air flow outlet 404 of the air duct 40 at an interval of 120 degrees. In Figure 5 In the example of C, the number of radiation sources 30 is four, and the four radiation sources 30 are arranged around the air flow outlet 404 of the air duct 40 at an interval of 90 degrees. In Figure 5 In the example of D, the number of radiation sources 30 is five, and the five radiation sources 30 are arranged around the air flow outlet 404 of the air duct 40 at an interval of 72 degrees. It can be understood that the number of radiation sources 30 can also be more than five, and they are arranged evenly around the air flow outlet 404 of the air duct 40 at intervals along the circumferential direction of the air duct 40. In addition, in other embodiments, among the multiple radiation sources 30, the angle between adjacent two radiation sources 30 can be different. No specific limitation is made here.

[0093] In Figure 6 、 Figure 7In the example of A-7D, the radiation source 30 has an annular or sector shape in a plane perpendicular to the axial direction of the air duct 40. In Figure 7 In the example of A, the number of radiation sources 30 is single, and the single radiation source 30 is annular and arranged around the air flow outlet 404 of the air duct 40 in a 360-degree circumferential direction of the air duct 40. In Figure 7 In the example of B, the number of radiation sources 30 is two, and each radiation source 30 is basically in a 180-degree sector shape. Each radiation source 30 is arranged around the air flow outlet 404 of the air duct 40 in a circumferential direction of the air duct 40 approaching 180 degrees, and the two radiation sources 30 are arranged to be basically annular. In Figure 7 In the example of C, the number of radiation sources 30 is three, and each radiation source 30 is basically in a 120-degree sector shape. Each radiation source 30 is arranged around the air flow outlet 404 of the air duct 40 in a circumferential direction of the air duct 40 approaching 120 degrees, and the three radiation sources 30 are arranged to be basically annular. In Figure 7 In the example of D, the number of radiation sources 30 is four, and each radiation source 30 is basically in a 90-degree sector shape. Each radiation source 30 is arranged around the air flow outlet 404 of the air duct 40 in a circumferential direction of the air duct 40 approaching 90 degrees, and the four radiation sources 30 are arranged to be basically annular. It can be understood that the number of radiation sources 30 can also be more than four and is arranged around the air flow outlet 404 of the air duct 40 at uniform intervals in the circumferential direction of the air duct 40. In addition, in other embodiments, among the multiple radiation sources 30, the sector radian of each radiation source 30 can be different. No specific limitation is made here.

[0094] In one embodiment, the radiation source 30 is arranged on one side of the air flow outlet 404 of the air duct 40. In Figure 8 、 Figure 9 In the example of A-9D, the radiation source 30 has a circular or approximately circular shape in a plane perpendicular to the axial direction of the air duct 40. In Figure 9 In the example of A, the number of radiation sources 30 is single, and the single radiation source 30 is arranged on the lower half side of the air flow outlet 404 of the air duct 40. In Figure 9 In the example of B, the number of radiation sources 30 is two, and the two radiation sources 30 are arranged on the lower half side of the air flow outlet 404 of the air duct 40. In Figure 9 In the example of C, the number of radiation sources 30 is three, and the three radiation sources 30 are arranged on the lower half side of the air flow outlet 404 of the air duct 40. In Figure 9In the example of D, the number of radiation sources 30 is four, and the four radiation sources 30 are arranged on the lower half side of the air flow outlet 404 of the air duct 40. It can be understood that the number of radiation sources 30 can also be more than five and arranged on the lower half side of the air flow outlet 404 of the air duct 40. Additionally, in other embodiments, the radiation sources 30 can also be arranged on the upper half side, left half side, right half side, upper left half side, lower left half side, upper right half side, and lower right half side, which are not specifically limited herein. In other embodiments, the planar shape of the radiation source 30 perpendicular to the axial direction of the air duct 40 can be circular or fan-shaped.

[0095] In other embodiments, it can also be any combination of circular radiation sources 30, circular ring-shaped radiation sources 30, and fan-shaped radiation sources 30 that are dispersedly arranged on one side of the air flow outlet 404 of the air duct 40 or arranged around the air flow outlet 404 of the air duct 40.

[0096] In one embodiment, the second part is integrally formed and connected to the air duct 40. In this way, the heat exchange efficiency between the second part and the air duct 40 can be high.

[0097] Specifically, the radiation source 30 can include a reflector cup 302. The second part can be a part of the outer wall of the reflector cup 302 or a part of the base of the reflector cup 302. The reflector cup 302 can be integrally formed and connected to the air duct 40. The integral forming connection can be achieved by an injection molding process or a welding process. It is not specifically limited herein. A joint is formed at the section of the outer wall of the reflector cup 302 and the air duct 40 at the air flow outlet 404. At the joint, the inhaled air exchanges heat with the reflector cup 302, and the temperature of the air will increase by about 1 to 5 degrees and then be blown out. Although it is not sufficient to have a decisive impact on the object to be dried (such as drying hair), it improves the user's feeling when the air blows on the body, making people not feel the cold air blowing, thus improving the user experience.

[0098] In one embodiment, the radiation source 30 is surrounded by the air duct 40. In this way, another configuration of the drying device 100 can be achieved, such as Figure 10 shown.

[0099] Specifically, the radiation source 30 can be placed in the air duct 40. The first part of the radiation source 30 can be blocked by a shielding member so that the first part will not be blown by the air flow in the air duct 40. For example, the first part can include a part of the outer wall of the reflector cup 302, and this part can be blocked so that it will not be blown by the air flow in the air duct 40. And the unblocked part of the outer wall of the reflector cup 302 can be used as the second part, and the air flow in the air duct 40 can blow to the second part to enable the second part to exchange heat with the air duct 40.

[0100] In Figure 10 、 Figure 11In the example of A-11D, the radiation source 30 has a circular or approximately circular shape in a plane perpendicular to the axial direction of the air duct 40. In Figure 11 In the example of A, the number of radiation sources 30 is single, and the single radiation source 30 is arranged in the air duct 40. In Figure 11 In the example of B, the number of radiation sources 30 is two, and the two radiation sources 30 are dispersedly arranged in the air duct 40 along the radial direction of the air duct 40. In Figure 11 In the example of C, the number of radiation sources 30 is three, and the three radiation sources 30 are dispersedly arranged in the air duct 40 in a triangular shape. In Figure 11 In the example of D, the number of radiation sources 30 is four, and the four radiation sources 30 are dispersedly arranged in the air duct 40 in a square shape. It can be understood that the number of radiation sources 30 can also be more than four, and they are dispersedly arranged in the air duct 40. No specific limitation is made here.

[0101] In Figure 12 、 Figure 13 In the example of A-13D, the radiation source 30 has an annular or sector shape in a plane perpendicular to the axial direction of the air duct 40. In Figure 13 In the example of A, the number of radiation sources 30 is two, and each radiation source 30 is annular. The two radiation sources 30 are concentrically arranged in the air duct 40, thus forming two layers of annular radiation sources 30. In Figure 13 In the example of B, the number of radiation sources 30 is two, and each radiation source 30 is basically a 180-degree sector. The two radiation sources 30 are arranged to be basically annular. In Figure 13 In the example of C, the number of radiation sources 30 is three, and each radiation source 30 is basically a 120-degree sector. The three radiation sources 30 are arranged to be basically annular. In Figure 13 In the example of D, the number of radiation sources 30 is four, and each radiation source 30 is basically a 90-degree sector. The four radiation sources 30 are arranged to be basically annular. It can be understood that the number of radiation sources 30 can also be single or more than four, and they are dispersedly arranged in the air duct 40. Additionally, in other embodiments, among the multiple radiation sources 30, the sector radian of each radiation source 30 can be different. No specific limitation is made here.

[0102] In other embodiments, it can also be any combination of circular radiation sources 30, annular radiation sources 30, and sector radiation sources 30 that are dispersedly arranged in the air duct 40.

[0103] In one embodiment, the number of radiation sources 30 is multiple, and the multiple radiation sources 30 are dispersedly arranged in the air duct 40.

[0104] Thus, the multiple radiation sources 30 dispersedly arranged in the air duct 40 can avoid the phenomenon that the heat is too concentrated and the local part of the radiation source 30 or the air duct 40 overheats.

[0105] Specifically, please refer to Figure 14 and Figure 15 A. An air duct 40 is provided with an air flow outlet 404, and a plurality of radiation sources 30 arranged dispersedly can be star-shaped and placed in the air flow outlet 404 of the air duct 40.

[0106] In one embodiment, the air duct 40 is provided with a plurality of air flow outlets 404, and the radiation sources 30 are arranged between adjacent air flow outlets 404, as Figure 15 shown in B.

[0107] Specifically, it can be that an air duct 40 is provided with a plurality of air flow outlets 404, and a plurality of radiation sources 30 arranged dispersedly can be star-shaped and placed in the air duct 40. Or it can be that there are a plurality of air ducts 40, and each air duct 40 is provided with an air flow outlet 404. The plurality of air flow outlets 404 can be star-shaped and embedded in the gaps between the plurality of radiation sources 30. It can also be a mixed arrangement of the above two, which is not specifically limited herein.

[0108] In one embodiment, please refer to Figure 10 , Figure 12 and Figure 14 . The drying device 100 further includes a separator 50, and the separator 50 is arranged in the air duct 40. In this way, the separator 50 can be used to block a part of the radiation source 30, and the blocked part of the radiation source 30 is not blown by the air flow in the air duct 40. This part can be regarded as the first part and can be considered to be located outside the air duct 40. In one example, the blocked part of the radiation source 30 can be at least one of a part of the outer wall of the reflector cup 302 and the base of the reflector cup 302. The outer wall of the separator 50 can be arranged in the form of a wind guiding member. For example, the outer wall of the separator 50 is arranged in a streamlined shape to reduce wind noise and wind resistance. Further, a heat dissipation member (not shown in the figure) is arranged on the outer wall of the separator 50. In this way, the heat dissipation efficiency can be increased. Specifically, the heat dissipation member can include one or any combination of heat dissipation fins, heat dissipation air ducts, heat pipes, and heat dissipation plates.

[0109] In one embodiment, the separator 50 is arranged at the air flow outlet 404 of the air duct 40. In this way, the separator 50 arranged at the air flow outlet 404 has less adverse influence on the air flow in the air duct 40.

[0110] In one embodiment, the separator 50 is coupled to at least one of the radiation source 30, the housing 10, and the air duct 40.

[0111] Specifically, the coupling method can be detachably connected or fixedly connected.

[0112] In one embodiment, the air flow flows in the channel formed between the inner wall of the air duct 40 and the outer wall of the separator 50. In this way, the air flow can flow out of the drying device 100 through the channel and can take away the heat of the separator 50.

[0113] Specifically, the separator 50 may absorb the heat generated during the operation of the radiation source 30 and heat up. When the air flow passes through the channel, it can dissipate the heat of the separator 50, ensuring the service life of the separator 50.

[0114] In one embodiment, a part of the radiation source 30 is accommodated in the separator 50. In this way, the separator 50 can block a part of the radiation source 30 and prevent it from being blown by the air flow in the air duct 40.

[0115] Specifically, the radiation source 30 may include a reflector cup 302. A part of the outer wall of the reflector cup 302 can be accommodated in the separator 50. This part can be used as the first part to prevent the heat of the radiation source 30 from being excessively dissipated due to being directly blown by the air flow in the air duct 40, so as to ensure that the radiation source 30 maintains an appropriate working temperature during operation.

[0116] In one embodiment, the radiation source 30 is in coplanar contact with the separator 50. In this way, the adverse effect of the connection formed between the radiation source 30 and the separator 50 on the air flow can be reduced.

[0117] Specifically, the coplanar contact can make the connection formed between the radiation source 30 and the separator 50 have a smooth transition. When the air flow passes through the connection, it can flow smoothly, reducing wind noise and wind resistance. In one example, the connection can form a streamline-shaped surface.

[0118] In one embodiment, please refer to Figure 10 、 Figure 12 and Figure 14 , the inner wall of the separator 50 and the outer wall of the radiation source 30 enclose a cavity 60. The first part includes the outer wall part of the radiation source 30 that encloses the cavity 60. Specifically, the outer wall part of the radiation source 30 can be a part of the outer wall of the reflector cup 302, or the base of the reflector cup 302, or a part of the base, or include a part of the outer wall of the reflector cup 302 and the base of the reflector cup 302, or include a part of the outer wall of the reflector cup 302 and a part of the base of the reflector cup 302. That is to say, the outer wall part of the radiation source 30 that encloses the cavity 60 is blocked by the separator 50, so that the air flow in the air duct 40 cannot blow directly.

[0119] In one embodiment, via the separator 50, the air duct 40 exchanges heat with the radiation source 30 by at least one of heat conduction and heat convection. In this way, the heat of the radiation source 30 can be properly dissipated, and the temperature during operation will not be too high or too low.

[0120] In one embodiment, the drying device 100 further includes a control board (not shown in the figure), and the control board is disposed within the spacer 50. In this way, the space within the housing 10 can be fully utilized, and the structure of the drying device 100 can be made compact.

[0121] Specifically, the control board can be placed in the cavity 60. The control board can include a circuit board and various components mounted on the circuit board, such as a processor, a controller, a power supply, a switching circuit, a detection circuit, etc. The control board can be electrically connected to the radiation source 30, the motor 20, and other electrical components, such as a lighting lamp, an indicator light, a sensor, etc. The control board is used to control the operation of the drying device 100, including but not limited to controlling the operation mode, the operation duration, the motor speed, the power of the radiation source 30, etc. of the drying device 100.

[0122] In one embodiment, the drying device 100 includes a power supply, and a part of the power supply is disposed within the spacer 50. The power supply is electrically connected to at least one of the radiation source 30 and the control board. In this way, the heat of the power supply can be dissipated through the spacer 50, and the power supply can supply power to at least one of the radiation source 30 and the control board.

[0123] Specifically, the power supply can include one or more batteries, and the batteries can be rechargeable batteries. The power supply can be a dedicated power supply for the radiation source 30, or a dedicated power supply for the control board, or can supply power to both the radiation source 30 and the control board at the same time. The control board can be connected with a switch, and by controlling the on / off of the switch, it is possible to control whether the power supply supplies power to the radiation source 30.

[0124] In one embodiment, along the direction of air flow, the motor 20 is located downstream of at least part of the power supply. In this way, the heat generated when the power supply works is taken away by the wind of the motor, ensuring the normal operation of the power supply.

[0125] Please refer to Figure 1 , the power supply 70 can include multiple batteries. It can be that the motor 20 is located downstream of all the batteries, or the motor 20 can be between multiple batteries. For example, the lower part of the handle 104 is for placing the batteries, the middle part is for placing the motor 20, and the upper part is for placing the batteries. The lower half of the handle is the battery, the upper half is the motor 20, and there are also batteries within the body 102. In this way, the airflow (wind) generated by the motor 20 can flow through at least part of the power supply, so that the part of the power supply blown by the wind can be cooled.

[0126] In addition, generally, the power supply 70 is heavier than the motor 20. The motor 20 being located downstream of at least part of the power supply 70 can prevent the drying device 100 from being top-heavy. Further, it can also reduce the air flow resistance generated by the motor 20.

[0127] In one embodiment, the drying device 100 includes a safety sensor (not shown in the figure), the safety sensor is electrically connected to the power supply 70 and the radiation source 30, and the safety sensor is configured to disconnect the power supply of the power supply 70 when the temperature of the radiation source 30 is greater than the set temperature. In this way, the safety of the drying device 100 can be improved.

[0128] Specifically, the temperature of the radiation source 30 during operation may reach several hundred degrees or thousands of degrees. If the temperature of the radiation source 30 abnormally increases due to abnormal operation, it may cause scalding accidents to users. Therefore, a safety sensor is provided to disconnect the power supply of the power supply 70 when the temperature of the radiation source 30 is greater than the set temperature, so that the radiation source 30 stops working and the temperature drops, avoiding safety accidents and improving the safety of the drying device 100. The specific value of the set temperature can be set according to requirements and is not specifically limited herein.

[0129] In one example, the safety sensor may include a thermostat. The parameter selection of the thermostat can be determined according to the value of the set temperature.

[0130] In one embodiment, the radiation source 30 is disposed on the longitudinal axis L of the air duct 40. In this way, the heat dissipation efficiency around the radiation source 30 by the air flow is basically the same, avoiding the situation of high local temperature and low local temperature of the radiation source 30, which is beneficial to maintaining the working efficiency of the radiation source 30 and the stability of the intensity of infrared radiation.

[0131] In one example, the number of the radiation sources 30 is single, and the single radiation source 30 is disposed on the longitudinal axis L of the air duct 40. In one example, the number of the radiation sources 30 is multiple, and the multiple radiation sources 30 are circumferentially disposed around the longitudinal axis L of the air duct 40.

[0132] The radiation source 30 may include a reflector cup 302 and a light emitting element 304. The light emitting element 304 is located inside the reflector cup 302. The first part includes a part of the outer wall of the reflector cup 302, and the second part includes another part of the outer wall of the reflector cup 302. For example, in Figure 1 the second part may be a part of the outer wall of the reflector cup 302 that is directly in contact with the outer wall of the air duct 40, and the first part may be another part of the outer wall of the reflector cup 302 that is connected to the outer wall of the air duct 40 through the second part. In other embodiments, the second part may include a part of the base of the reflector cup 302, and this part of the base is directly in contact with the outer wall of the air duct 40. It can be understood that in other embodiments, the first part may include the base of the reflector cup 302 or a part of the base.

[0133] Preferably, the surface area of the first part is greater than the surface area of the second part. In this way, the radiation source 30 can be appropriately cooled and the appropriate working temperature of the radiation source 30 can be maintained.

[0134] Specifically, the second part exchanges heat with the air duct 40, and the heat exchange method may include at least one of heat conduction and heat convection. By simply setting the surface area, most of the heat of the radiation source 30 can maintain the operating temperature of the radiation source 30, while the extra heat is dissipated by the heat exchange between the second part and the air duct 40.

[0135] In Figure 1 , Figure 6 and Figure 8 In the illustrated embodiment, the second part is in direct contact with the outer wall of the air duct 40. Specifically, in one example, a part of the outer wall of the reflector cup 302 is in direct contact with the outer wall of the air duct 40 for heat exchange. Specifically, it may be that a part of the outer wall of the reflector cup 302 forms a part of the outer wall of the air duct 40 to be in direct contact with another part of the outer wall of the air duct 40. That is to say, this part of the outer wall of the reflector cup 302 serves as both a part of the outer wall of the reflector cup 302 and a part of the outer wall of the air duct 40. Additionally, it may also be that a part of the outer wall of the reflector cup 302 is located outside the outer wall of the air duct 40 and is in direct contact with the outer wall of the air duct 40.

[0136] In Figures 16 - 18 In the illustrated embodiment, the second part contacts the air duct 40 through an additional heat dissipation structure 80 for heat exchange. Specifically, the heat dissipation structure 80 may include metals conducive to heat dissipation (such as aluminum, copper, aluminum alloy, copper alloy, etc.), carbon fiber materials, etc. The specific form of the heat dissipation structure 80 is not limited. For example, it may be one or any combination of heat dissipation fins, heat dissipation plates, heat dissipation air ducts, and heat pipes. The heat dissipation structure 80 can exchange heat between the air duct 40 and the second part through at least one of heat conduction and heat convection.

[0137] In one embodiment, the heat dissipation structure 80 connects the outer walls of the second part and the air duct 40. That is to say, a heat dissipation structure 80 is provided between the air duct 40 and the second part. In one example, the second part is a part of the outer wall of the reflector cup 302, and the heat dissipation structure 80 connects this part of the outer wall of the reflector cup 302 to the outer wall of the air duct 40.

[0138] In one embodiment, please refer to Figure 16 and Figure 17 , a part of the heat dissipation structure 80 is located inside the air duct 40. In one example, the second part is a part of the outer wall of the reflector cup 302. One end of the heat dissipation structure 80 is connected to this part of the outer wall of the reflector cup 302, and the other end of the heat dissipation structure 80 extends into the air duct 40, and the airflow inside the air duct 40 directly blows onto this end of the heat dissipation structure 80. Further, the part of the heat dissipation structure 80 located inside the air duct 40 can be formed into a first air guiding member. In this way, the adverse effect of this part of the heat dissipation structure 80 on the airflow can be reduced, and wind noise, wind resistance, etc. can be reduced.

[0139] Specifically, the first air guiding member may have a streamlined windward surface, and air flow can smoothly flow over this windward surface. Further, the first air guiding member is integrally connected to the second air guiding member within the air duct 40. In this way, on the one hand, the second air guiding member within the air duct 40 can guide the air flow, and on the other hand, it can also improve the heat exchange efficiency. The second air guiding member may be a guiding strip and / or a guiding groove formed on the inner wall of the air duct 40, and the second air guiding member may also be set to be streamlined. Through the setting of the second air guiding member, the air flow can be rectified and its direction adjusted. The integral connection between the first air guiding member and the second air guiding member within the air duct 40 enables the air flow to pass through the first air guiding member and the second air guiding member seamlessly, further reducing wind noise and wind resistance, etc.

[0140] In one embodiment, the heat dissipation structure 80 forms a part of the outer wall of the air duct 40. That is to say, a part of the outer wall of the air duct 40 can form the heat dissipation structure 80 for heat exchange with a second part (such as a part of the outer wall of the reflector cup 302).

[0141] In one embodiment, the heat dissipation structure 80 forms a part of the inner wall of the air duct 40. That is to say, a part of the inner wall of the air duct 40 can form the heat dissipation structure 80 and perform heat exchange with a second part (such as a part of the outer wall of the reflector cup 302) through a connection structure passing through the wall of the air duct 40.

[0142] In the embodiments of the present application, the outer wall and the inner wall of the air duct 40 can be two surfaces of one part, or one surface of each of two parts, and the two parts are connected to form the air duct 40. No specific limitation is made here.

[0143] In one embodiment, the light emitting member 304 emits radiation containing an infrared band. In this way, the radiation in the infrared band emitted by the light emitting member 304 can be used to dry an object, and the drying effect is good.

[0144] Specifically, the radiation in the infrared band may include radiation in the far-infrared band, radiation in the near-infrared band, etc. In one example, the infrared band radiation emitted by the light emitting member 304 can cover the infrared spectrum above 0.7 μm. In one example, the wavelength of the infrared radiation emitted by the light emitting member 304 is in the range of 0.7 μm to 20 μm.

[0145] In another example, the radiation emitted by the light emitting member 304 can generally cover the visible spectrum from 0.4 μm to 0.7 μm and the infrared spectrum above 0.7 μm.

[0146] In one embodiment, the light emitting member 304 includes at least one of a halogen lamp, ceramics, graphene, and a light emitting diode.

[0147] Specifically, examples of the ceramic may include a positive temperature coefficient (PTC) heater and a metal-ceramic heater (MCH). The light-emitting member 304 of the ceramic includes a metal heating element buried inside the ceramic, such as tungsten buried inside silicon nitride or silicon carbide. The light-emitting member 304 may be provided in the form of a wire (e.g., a filament). The wire may be patterned (e.g., formed into a helical filament) to increase its length and / or surface area. The light-emitting member 304 may also be provided in the form of a rod. In one example, the light-emitting member 304 may be a silicon nitride rod, a silicon carbide rod, or a carbon fiber rod having a preset diameter and length.

[0148] The light-emitting member 304 may be selected from one of a halogen lamp, a ceramic, graphene, and a light-emitting diode, or the light-emitting member 304 may be selected from a combination of two or more of a halogen lamp, a ceramic, graphene, and a light-emitting diode. No specific limitation is made here.

[0149] In order to have a higher infrared emissivity, it is necessary to raise the temperature of the light-emitting member 304. The temperature of the light-emitting member 304 may be at least 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800, 1900, or 2000 degrees Celsius (°C). In one example, the temperature of the light-emitting member 304 may be 900 to 1500 degrees Celsius. The central wavelength or wavelength range of the infrared radiation emitted by the light-emitting member 304 may be tunable, for example, tunable by at least 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, or 10.0 μm. The power density of the radiation emitted from the light-emitting member 304 may be adjusted in different operating modes of the drying device 100 (e.g., a rapid drying mode, a hair health mode, etc.), for example, by changing the voltage and / or current supplied to the drying device 100.

[0150] The reflector cup 302 may be configured to adjust the radiation direction emitted from the light-emitting member 304. For example, the reflector cup 302 may be configured to reduce the divergence angle of the reflected radiation beam.

[0151] The reflective surface of the reflector cup 302 may be coated with a coating material that has a high reflectivity to the wavelength or wavelength range of the radiation emitted by the light-emitting member 304. For example, the coating material may have a high reflectivity to wavelengths in both the visible spectrum and the infrared spectrum. Materials with high reflectivity can be highly efficient in reflecting radiant energy. Examples of the coating material may include metallic materials and dielectric materials. The metallic materials may include, for example, silver and aluminum. The dielectric coating may have alternating layers of dielectric materials, such as magnesium fluoride. The reflectivity of the reflective surface provided with the coating may be at least 90% (e.g., 90% of the incident radiation is reflected by the reflective surface of the reflector cup 302), 90.5%, 91%, 91.5%, 92%, 92.5%, 93%, 93.5%, 94%, 94.5%, 95%, 95.5%, 96%, 96.5%, 97%, 97.5%, 98%, 98.5%, 99%, 99.5%, 99.6%, 99.7%, 99.8%, 99.9% or higher. In some instances, the reflectivity of the reflective surface provided with the coating may be approximately 100%, which means that substantially all of the radiation emitted by the light-emitting member 304 can be reflected towards the outside of the drying device 100. Therefore, even if the temperature of the light-emitting member 304 is high, the temperature on the reflective surface of the reflector cup 302 will not substantially increase due to the radiation emitted by the light-emitting member 304.

[0152] In one embodiment, the axial cross-section of the reflective surface of the reflector cup 302 is in the shape of a polynomial curve. In this way, a focus can be formed on the reflective surface, facilitating the guiding of infrared radiation and reducing the divergence angle of the reflected radiation beam.

[0153] Specifically, the shape of the polynomial curve may include shapes such as parabola, ellipse, hyperbola, etc. In one example, the axial cross-section of the reflective surface of the reflector cup 302 is in the shape of a parabola.

[0154] In one embodiment, the light-emitting member 304 is disposed at the focus of the reflective surface of the reflector cup 302. In this way, the infrared light beam emitted by the light-emitting member 304 can be reflected by the reflective surface and substantially parallelly exit from the opening of the reflector cup 302, making the directivity of the infrared radiation emitted by the drying device 100 good.

[0155] Specifically, when the light-emitting member 304 is disposed at the focus of the reflective surface of the reflector cup 302, the infrared radiation beam emitted by the light-emitting member 304 at the focus is reflected by the reflective surface of the reflector cup 302 and substantially parallelly exits from the opening of the reflector cup 302.

[0156] In other embodiments, the light-emitting member 304 may also be placed off the focus of the parabola such that the reflected infrared radiation beam can converge or diverge at a certain distance in front of the drying device 100. The position of the light-emitting member 304 in the reflector cup 302 is adjustable. Therefore, the degree of convergence and / or the direction of the output radiation beam can be changed. The shapes of the reflector cup 302 and the light-emitting member 304 can be optimized and varied relative to each other to output the desired heating power at the desired position of the drying device 100.

[0157] In addition, a heat-insulating material (e.g., fiberglass, mineral wool, cellulose, polyurethane foam, or polystyrene) can be inserted between the light-emitting member 304 and the reflector cup 302 to insulate the light-emitting member 304 from the reflector cup 302. Even if the temperature of the light-emitting member 304 is high, the thermal insulation can keep the temperature of the reflector cup 302 from increasing. A heat-insulating material can also be inserted between the periphery of the optical element and the reflector cup 302 to insulate the optical element from the reflector cup 302.

[0158] In one embodiment, refer to Figure 19 , the radiation source 30 includes a first reflector 306 disposed within the light-emitting member 304. In this way, the infrared radiation within the light-emitting member 304 can be reflected to the opening of the reflector cup 302, improving the utilization rate of the infrared radiation.

[0159] Specifically, the axial cross-section of the reflective surface of the first reflector 306 can be in the shape of a polynomial curve, such as a parabola. The first reflector 306 can be made of a high-temperature resistant material, and a coating is provided on the reflective surface, which has a high reflectivity to infrared radiation. In one example, the light-emitting member 304 is a light bulb.

[0160] In one embodiment, the light-emitting member 304 includes a clamping position 308, and the first reflector 306 is disposed close to the clamping position 308. In this way, the infrared radiation leaking from the clamping position 308 can be reflected to the opening of the reflector cup 302.

[0161] Specifically, the light-emitting member 304 may include a filament connected to the clamping position 308. When the filament is energized, it emits infrared radiation, which is emitted in all directions, and part of the infrared radiation will shoot towards the clamping position 308. Therefore, by disposing the first reflector 306 near the clamping position 308, the first reflector 306 can be used to reflect this part of the infrared radiation to the opening of the reflector cup 302, thereby improving the utilization rate of the infrared radiation. The distance between the first reflector 306 and the clamping position 308 can be calibrated in advance, and no specific limitation is made here. In one example, the first reflector 306 can be installed at a position of the filament close to the clamping position 308.

[0162] In one embodiment, the light emitting member 304 includes a light emitting portion 309, the axial cross section of the reflective surface of the first reflector 306 is in the shape of a polynomial curve facing the light emitting portion 309, and the light emitting portion 309 is located at the focus of the reflective surface of the first reflector 306. In this way, the infrared radiation emitted by the light emitting portion 309 to the first reflector 306 can be reflected by the first reflector 306 to form a parallel light beam that is emitted toward the opening of the reflective cup 302.

[0163] Specifically, the shape of the polynomial curve may include a parabola, an ellipse, a hyperbola, etc. In one example, the axial cross section of the reflective surface of the first reflector 306 is in the shape of a parabola.

[0164] The light emitting portion 309 is a portion that emits infrared radiation when powered on. In one example, the light emitting portion 309 may be a filament (such as a tungsten filament). It is understood that in other examples, the light emitting portion 309 may also be in a block shape or other shapes.

[0165] In one embodiment, the light emitting member 304 includes a light emitting portion 309, the light emitting portion 309 is supported by a conductive support, the first reflector 306 is mounted on the conductive support, and the radiation source 30 includes an insulating member, which connects the conductive support and the first reflector 306. In this way, the conductive support and the first reflector 306 can be insulated.

[0166] Specifically, the light emitting element 304 further includes a pin located at the clamping position 308, and the conductive bracket can connect the pin and the light emitting part 309. The material of the first reflector can be metal, and the first reflector 306 is installed on the conductive bracket, and the place where it is connected to the conductive bracket should be insulated to prevent short circuit during installation. Therefore, the insulating member can connect the conductive bracket and the first reflector 306, so that the conductive bracket and the first reflector 306 are insulated, thereby ensuring the normal operation of the light emitting element 304.

[0167] In one embodiment, the light emitting member 304 includes a clamping seal 308, and the first reflective member 306 is supported by an insulating bracket, and the insulating bracket is connected to the clamping seal 308. In this way, the first reflective member 306 can be installed.

[0168] Specifically, the first reflector 306 may not be installed on the light emitting portion 309 , but may be installed on the clamping position 308 by another insulating bracket.

[0169] In one embodiment, the radiation source 30 includes a second reflector 312, and the second reflector 312 is located inside the light emitting element 304 and close to the top of the light emitting element 304. In this way, the utilization rate of infrared radiation can be improved.

[0170] Generally, the emission angle of the light emitted by the light-emitting part 309 and exiting through the opening edge of the reflector 302 is relatively large. If this part of the light is directly emitted, it may not be able to irradiate the target object. By installing the second light-emitting part 304 above the light-emitting part 304, this part of the light emitted by the light-emitting part 309 located at the focus of the reflector 302 can be reflected back into the reflector 302 by the second reflector 312, and then re-reflected by the reflector 302, thereby reducing the emission angle of this part of the light and enabling this part of the light to be directed to the target object.

[0171] In one embodiment, the axial cross-section of the reflecting surface of the second reflector 312 is in the shape of a polynomial curve facing the light-emitting part 304, and the light-emitting part 304 is located at the focus of the reflecting surface of the second reflector 312. In this way, the infrared radiation emitted from the light-emitting part 309 to the second reflector 312 can form a parallel light beam and exit into the reflector 302 after being reflected by the second reflector 312.

[0172] Specifically, the shape of the polynomial curve may include shapes such as parabola, ellipse, hyperbola, etc. In one example, the axial cross-section of the reflecting surface of the second reflector 312 is in the shape of a parabola.

[0173] In one embodiment, the second reflector 312 is provided with a light-passing hole (not shown in the figure). In this way, part of the light emitted by the light-emitting part 309 can exit through the light-passing hole.

[0174] Specifically, in one embodiment, the planar shape of the second reflector 312 can be circular, and the light-passing hole can be opened near the center of the circle. In this way, the light emitted by the light-emitting part 309 opposite to the light-passing hole can directly exit through the light-passing hole. The emission angle of this part of the light is usually small. Therefore, this part of the light is allowed to directly exit through the light-passing hole without being reflected by the second reflector 312.

[0175] In one embodiment, the light-emitting part 304 includes a light-emitting part 309, the light-emitting part 309 is supported by a conductive bracket, the second reflector 312 is installed on the conductive bracket, and the radiation source 30 includes an insulating part (not shown in the figure), and the insulating part connects the conductive bracket and the second reflector 312. In this way, insulation can be achieved between the conductive bracket and the second reflector 312.

[0176] Specifically, the material of the second reflector 312 can be metal. When the second reflector 312 is installed on the conductive bracket, the connection part with the conductive bracket needs to be insulated to prevent short circuits during installation. Therefore, the insulating part can connect the conductive bracket and the second reflector 312 to insulate between the conductive bracket and the second reflector 312, ensuring the normal operation of the light-emitting part 304.

[0177] In one embodiment, the light-emitting member 304 includes a clamping position 308, and the second reflecting member 312 is supported by a second insulating bracket, and the second insulating bracket is connected to the clamping position 308. In this way, the installation of the second reflecting member 312 can be realized.

[0178] Specifically, the second reflecting member 312 may not be installed on the light-emitting portion 309. The second reflecting member 312 may be supported by another insulating bracket located at the clamping position 308 and close to the top of the light-emitting portion 309.

[0179] In one embodiment, please refer Figure 20 and Figure 22 , a clearance portion is formed on the wall of the reflector cup 302, and the shape of the clearance portion is adapted to the air duct 40 and / or the housing 10. This can make the drying device 100 more compact.

[0180] Specifically, among the multiple radiation sources 30, the configuration (parabolic type) of the reflector cup 302 will occupy the device space and / or compress the air duct 40 (thereby affecting the air flow). Due to the overall size limitation of the drying device 100, the overall space utilization rate can be improved by increasing the number of radiation sources 30 while reducing the size of a single reflector cup 302. However, due to the limitations of various radiation source 30 processes (such as the filament size in the bulb), if the size of the reflector cup 302 is relatively too small compared to the radiation source 30, the radiation efficiency will be severely attenuated. At the same time, since the light-emitting member 304 is installed in the reflector cup 302, some installation and positioning structures are required inside the reflector cup 302, and the damage to the reflective cup shape of the small reflector cup 302 by this part of the structure is greater than that of the large-sized reflector cup 302. And in the given product shape, using a large reflector cup 302 may exceed the shape limit. Under the conditions of meeting the radiation efficiency and the above two constraints, the outer wall of the reflector cup 302 needs to be cut for clearance to adapt to the air duct 40 and / or the housing 10.

[0181] The radiation source 30 exchanges heat with the air duct 40 through the wall of the reflector cup 302. The traditional configuration of the reflector cup 302 limits the contact area between the wall of the reflector cup 302 and the air duct 40. To increase the area, part of the wall of the reflector cup 302 needs to erode the air duct 40, thereby affecting the air speed, air volume and generating air resistance. Therefore, it is necessary to cut the wall of the reflector cup 302 that invades the air duct 40 to adapt to the shape of the air duct 40, which can reduce the impact on the air flow. The advantage of this is that, given the size of the housing 10, the diameter of the air duct 40 will be larger than the traditional one.

[0182] At the same time, the part of the reflector cup 302 in contact with the inner wall of the housing 10 is also cut to adapt to the shape of that part. Please refer to Figure 22Through simulation and comparison with the uncut reflector cup, it is found that for a reflector cup 302 of a certain caliber, the cutting of the above two parts has little effect on the total outlet power of the reflector cup 302 and the energy density of the light spot outside a certain distance, which is within an acceptable range.

[0183] Specifically, the air-avoiding portion may be a portion formed on the outer wall of the reflective cup 302 to adapt to the shape of the air duct 40 and / or the housing 10. In this way, when the reflective cup 302 is coupled with the air duct 40 and / or the housing 10, the overall size after assembly can be reduced without affecting the appearance of the air duct 40 and / or the housing 10.

[0184] It should be noted that the following factors need to be considered when setting up the air-avoiding part:

[0185] Cutting area: related to heat dissipation efficiency and maintaining the working temperature of the light emitting element 304;

[0186] The shape of the cutting surface (the cutting surface in contact with the air duct 40): balances the effect on wind and the reflection path of light (thus affecting the convergence of light);

[0187] Cutting position: For different cutting positions, there is an optimal solution for the exit power and the power at the target spot.

[0188] When cutting, please note:

[0189] Entrance: In front of the plane of the focus of a polynomial curve (such as a parabola).

[0190] Exit cutout: It must meet the configuration restrictions of the outer wall of the main body of the drying device 100 and the air duct 40.

[0191] exist Figures 20 - 21 In the embodiment, a plurality of radiation sources 30 are arranged around an air flow outlet 404 of an air duct 40 .

[0192] exist Figures 23 - 24 In the embodiment, a plurality of radiation sources 30 are arranged on one side of the air flow outlet 404 of the air duct 40, which is the upper half in the figure.

[0193] exist Figures 25 - 26 , Figures 27 - 28 In the embodiment, a plurality of radiation sources 30 are surrounded by an air duct 40 .

[0194] In one embodiment, the air-avoiding portion includes a first air-avoiding portion 314, and the shape of the first air-avoiding portion 314 matches the contour of the air duct 40. In this way, the reflective cup 302 can be arranged closer to the air duct 40, thereby improving the space utilization of the drying device 100.

[0195] In one embodiment, the point on the first clearance portion 314 that is farthest from the opening of the reflector cup 302 is located on the side closer to the opening of the reflector cup 302 of the focus of the reflecting surface of the reflector cup 302. In this way, it can be ensured that the inlet cut of the clearance portion is in front of the plane of the focus of the reflector cup 302.

[0196] Specifically, the axial cross-section of the reflecting surface of the reflector cup 302 is in the shape of a polynomial curve (such as a parabola). The point on the first clearance portion 314 that is farthest from the opening of the reflector cup 302 is at the inlet cut. In this way, the light emitted by the light-emitting component 304 can be reflected by the reflecting surface portion connecting the clearance portion to form a parallel light beam for emission, reducing the influence of the clearance portion on the light emitted by the light-emitting component 304.

[0197] In one embodiment, the first clearance portion 314 is in contact with the airflow in the air duct 40. In this way, the heat exchange efficiency between the first clearance portion 314 and the air duct 40 can be improved.

[0198] Specifically, the first clearance portion 314 can be formed as a part of the wall of the air duct 40, so that the first clearance portion 314 can be in contact with the airflow in the air duct 40 and the heat can be carried away by the airflow.

[0199] In one embodiment, the contour of the air duct 40 is circular, with the center of the radial cross-section of the housing 10 as the center of the circle. The shape of the first clearance portion 314 can be arc-shaped, and the radian is adapted to the contour of the air duct 40, and the first clearance portion 314 can fit well with the air duct 40. On the one hand, the heat exchange efficiency is improved, and on the other hand, the structure is more compact.

[0200] It can be understood that in other embodiments, the contour of part of the air duct 40 can also be the concave shape of the inner or outer contour of the circular ring, with the center of the radial cross-section of the housing 10 as the center of the circle.

[0201] In one embodiment, the clearance portion includes a second clearance portion 316, and the curvature of the second clearance portion 316 is different from the curvature of the first clearance portion 314. In this way, the reflector cup 302 can be adapted to the actual components of the drying device 100.

[0202] Specifically, the second clearance portion 316 is located on the side away from the air duct 40 relative to the first clearance portion 314. The second clearance portion 316 can be matched with the shape of the inner wall of the housing 10, further reducing the space occupied by the reflector cup 302 and improving the space utilization rate.

[0203] Specifically, in one example, the second clearance portion 316 can be matched with the shape of the inner wall of the body. It can be understood that the second clearance portion 316 can also be matched with the shapes of other components of the drying device 100, and no specific limitation is made here.

[0204] In one embodiment, a common portion 317 is formed by connecting two reflecting cups 302 of two adjacent radiation sources 30. In this way, the space occupied by multiple radiation sources 30 can be further reduced, and the space utilization rate inside the housing 10 is improved.

[0205] Specifically, among two adjacent radiation sources 30, the two reflecting cups 302 are connected through the common portion 317, and the common portion 317 can be the wall of the reflecting cup 302. The common portion 317 can be in a flat plate shape to further reduce the space occupied by the two reflecting cups 302.

[0206] In one embodiment, the radial and axial cross-sections of the reflecting surface of the reflecting cup 302 are part of at least one polynomial curve shape. Specifically, the polynomial curve shape includes shapes such as a circle, a parabola, an ellipse, and a hyperbola. In one example, the axial cross-section of the reflecting surface of the reflecting cup 302 is part of at least one parabola shape, and the radial cross-section of the reflecting surface of the reflecting cup 302 is part of at least one parabola shape.

[0207] In one embodiment, the different radial cross-sections of the reflecting surface of the reflecting cup 302 are non-concentric circles. It can be understood that in other embodiments, the different radial cross-sections of the reflecting surface of the reflecting cup 302 can also be non-concentric ellipses.

[0208] In one embodiment, the radial and axial cross-sections of the reflecting surface of the reflecting cup 302 are connected by segmented polynomial curves.

[0209] In one embodiment, please refer Figure 29 to Figure 30 , the reflecting cup 302 includes a base 310, the light-emitting component 304 is connected to the base 310, the base 310 is not located at the vertex of the outer wall of the reflecting cup 302, and the light-emitting component 304 is located at the focus of the reflecting cup 302. In this way, a non-right-side-up installation method of the light-emitting component 304 can be realized.

[0210] The advantages of the non-right-side-up installation method are: 1) The heat at the clamping position 308 can be directly conducted to exchange heat with the air in the air duct or inside the air duct, or directly radiated out; 2) Since the clamping position at the base is relatively long, in order to ensure that the light-emitting component is at the focus of the reflecting cup, in the case of right-side-up installation, the base is often very long and occupies space. Non-right-side-up (such as side-mounted and upside-down) can save space.

[0211] Specifically, the axial cross-section of the reflecting surface (the inner wall of the reflecting cup 302) of the reflecting cup 302 can be a polynomial curve shape, and the axial cross-section of the outer wall of the reflecting cup 302 also has this shape. In this shape, the outer wall of the reflecting cup 302 has a vertex. In one embodiment of the present application, please refer Figure 31 to

[0212] In an embodiment of the present application, the light-emitting element 304 is located at the focal point of the reflecting cup 302, that is, the light-emitting element 304 is located at the focal point of the reflecting surface of the reflecting cup 302.

[0213] The base 310 is not located at the vertex of the outer wall of the reflecting cup 302. In one embodiment, please refer Figure 29 , the base 310 is located on the side wall of the reflecting cup 302. In this way, a side-mounted installation method of the light-emitting element 304 can be realized.

[0214] In one embodiment, the side wall of the reflecting cup 302 is coupled to the wall of the air duct 40. In this way, the heat of the light-emitting element 304 can be exchanged through the base 310, the side wall of the reflecting cup 302 and the wall of the air duct 40, and the light-emitting element 304 can be properly cooled.

[0215] Specifically, the heat of the wall of the air duct 40 can be carried away by the air flow in the air duct 40, and thus the light-emitting element 304 can be cooled.

[0216] The radiation source 30 can be arranged around the air outlet of the air duct 40. The side wall of the reflecting cup 302 is coupled to the wall of the air duct 40. It can be that the wall of the reflecting cup 302 is in direct contact with the wall of the air duct 40, or can be connected through an additional heat dissipation structure, or the wall of the reflecting cup 302 forms a part of the wall of the air duct 40. For specific details, please refer to the relevant embodiments of the present application, and no specific limitation is made here.

[0217] In one embodiment, the side wall of the reflecting cup 302 is used for heat exchange with the air flow in the air duct 40. In this way, the heat of the light-emitting element 304 can be exchanged through the base 310, the side wall of the reflecting cup 302 and the air flow in the air duct 40, and the light-emitting element 304 can be properly cooled.

[0218] Specifically, the radiation source 30 can be surrounded by the air duct 40. In this way, the side wall of the reflecting cup 302 will be blown by the air flow in the air duct 40, and thus the heat of the light-emitting element 304 can be taken away. For specific details, please refer to the relevant embodiments of the present application, and no specific limitation is made here.

[0219] The base 310 is not located at the vertex of the outer wall of the reflecting cup 302. In one embodiment, please refer Figure 30 , the light-emitting element 304 is located at the opening of the reflecting cup 302. In this way, an upside-down installation method of the light-emitting element 304 can be realized.

[0220] Specifically, a connecting member 318 can be provided at the opening of the reflecting cup 302, and the light-emitting element 304 is installed on the connecting member 318. The light-emitting element 304 faces the vertex of the reflecting cup 302.

[0221] In one embodiment, there are grooves on the wall at the opening of the reflector cup 302, and the grooves accommodate the lamp pins of the light-emitting component 304 or the wires connecting the lamp pins of the light-emitting component 304. Specifically, the lamp pins of the light-emitting component 304 or the wires connecting the lamp pins of the light-emitting component 304 can be led into the grooves through the connecting member 318.

[0222] In one embodiment, the base 310 is provided with an opening, and the opening accommodates the lamp pins of the light-emitting component 304 or the wires connecting the lamp pins of the light-emitting component 304. In this way, the lamp pins of the light-emitting component 304 or the wires connecting the lamp pins of the light-emitting component 304 can pass through the base 310 and can pass through the connecting member 318 to be connected to an external power source.

[0223] In one embodiment, the opening is closed by a material that is insulating, heat-insulating, and light-impermeable. In this way, the leakage of infrared radiation can be reduced.

[0224] In one embodiment, please refer to Figure 32 A- Figure 32 B, the radiation source 30 includes an optical element 90, and the optical element 90 is disposed at the opening of the reflector cup 302 and is used to filter or reflect radiation in non-infrared bands. In this way, only infrared radiation can be directed to the object to be dried.

[0225] Specifically, the optical element 90 may include a lens, a reflector, a prism, a grating, a beam splitter, a filter, or a combination thereof that changes or redirects light. In some embodiments, the optical element 90 may be a lens. In some embodiments, the optical element 90 may be a Fresnel lens.

[0226] In one embodiment, the radiation in non-infrared bands includes visible light and / or ultraviolet light. The optical element 90 can be made of a material with a high infrared transmittance. Examples of materials for the optical element 90 may include oxides (such as silicon dioxide), metal fluorides (such as barium fluoride), metal sulfides or metal selenides (such as zinc sulfide, zinc selenide), and crystals (such as crystalline silicon, crystalline germanium). Further, one or both sides of the optical element 90 can be coated with a material that absorbs or reflects the visible spectrum and the ultraviolet spectrum, so that only wavelengths in the infrared range can pass through the optical element 90. The optical element 90 can filter out (such as absorb) the radiation not in the infrared spectrum. The infrared transmittance of the optical element 90 can be at least 95% (for example, 95% of the incident radiation in the infrared spectrum passes through the optical element 90), 95.5%, 96.0%, 96.5%, 97.0%, 97.5%, 98.0%, 98.5%, 99%, 99.1%, 99.2%, 99.3%, 99.4%, 99.5%, 99.6%, 99.7%, 99.8%, 99.9% or higher. In one example, the infrared transmittance of the optical element 90 can be 99%.

[0227] In one example, the light-emitting element 304 can emit radiation with a wavelength ranging from 0.4 μm to 20 μm. The reflector cup 302 can direct all the radiation towards the optical element 90 (e.g., no radiation is absorbed at the reflective surface), and the optical element 90 can filter out any visible spectral wavelengths between 0.4 μm and 0.7 μm from the reflected radiation, such that only the radiation in the infrared spectrum exits the radiation source 30.

[0228] In one embodiment, the difference in the coefficient of thermal expansion between the optical element and the reflector cup is within a preset range. In this way, the coefficients of thermal expansion of the optical element and the reflector cup are made similar, avoiding deformation of the component with a smaller coefficient of thermal expansion when heated due to a large difference in the coefficient of thermal expansion. The coefficient of thermal expansion can be selected through simulation or testing according to the product performance, and no specific limitation is made here.

[0229] In one embodiment, the optical element 90 seals the opening of the reflector cup 302. In this way, a relatively sealed internal space can be formed within the reflector cup 302.

[0230] Specifically, the internal space of the reflector cup 302 can be configured to have a certain degree of vacuum. The pressure inside the reflector cup 302 can be less than 0.9 standard atmospheres (atm), 0.8 atm, 0.7 atm, 0.6 atm, 0.5 atm, 0.4 atm, 0.3 atm, 0.2 atm, 0.1 atm, 0.05 atm, 0.01 atm, 0.001 atm, 0.0001 atm or less. In one embodiment, the inside of the reflector cup 302 is in a near-vacuum state. For example, the pressure inside the reflector cup 302 can be about 0.001 atm or less. The vacuum can inhibit the evaporation and / or oxidation of the light-emitting element 304 and extend the lifespan of the radiation source 30. The vacuum can also prevent heat convection or heat conduction between the light-emitting element 304 and the optical element 90 and / or the reflector cup 302.

[0231] In one embodiment, the reflector cup 302 is filled with a protective gas. The protective gas can be a certain amount of non-oxidizing gas (such as an inert gas), while still maintaining a certain level of vacuum to reduce the increase in the temperature of the gas inside the space formed by the inner surfaces of the reflector cup 302 and the optical element 90. Although this temperature increase is very small, it is caused by heat convection and heat conduction. Examples of non-oxidizing gases can include nitrogen (N2), helium (He), argon (Ar), neon (Ne), krypton (Kr), xenon (Xe), radon (Rn), and nitrogen (N2). The presence of the inert gas can further protect the material of the light-emitting element 304 from oxidation and evaporation.

[0232] In Figure 32In the embodiment shown in A, multiple radiation sources 30 share the same optical element 90. That is to say, one optical element is provided at the opening of the reflector cups 302 of all the radiation sources. In Figure 32 In the embodiment shown in B, each radiation source has an optical element 90. That is to say, one optical element 90 is provided at the opening of one reflector cup 302. In other embodiments, some of the radiation sources share the same optical element, and each of the remaining radiation sources has an optical element.

[0233] In one embodiment, the drying device 100 further includes a control board, which is electrically connected to the radiation source 30 and / or the motor 20. In this way, the control of the drying device 100 can be realized.

[0234] Specifically, the control board may include a circuit board and various components mounted on the circuit board. For example, a processor, a controller, a power supply 70, a switching circuit, a detection circuit, etc. The control board can be electrically connected to the radiation source 30, the motor 20, and other electrical components, such as a lighting lamp, an indicator light, a sensor, etc. The control board is used to control the operation of the drying device 100, including but not limited to controlling the operation mode, the operation duration, the motor speed, the power of the radiation source 30, etc. of the drying device 100.

[0235] In one embodiment, the drying device 100 includes a power supply 70 located inside the housing 10. The power supply 70 is electrically connected to the control board, and the control board is electrically connected to the radiation source 30 and the motor 20. In this way, the control board can control the power consumption of the radiation source 30 and the motor 20.

[0236] Specifically, the control board can convert the voltage of the power supply 70 into the voltages adapted to the radiation source 30 and the motor 20 corresponding to the working mode of the drying device 100, so that the radiation source 30 and the motor 20 can work in this working mode. For example, by adjusting the voltage, the radiation power of the radiation source 30, the rotation speed of the motor 20 (i.e., the rotation speed of the fan blade), etc. can be adjusted. Or by turning on and off the power supply 70, the working duration of the radiation source 30 and the motor 20 can be controlled. It can be understood that in other embodiments, the power supply 70, the control board, the radiation source 30, and the motor 20 can also be connected in other ways. In one example, the power supply 70 can be installed in the handle 104.

[0237] In one embodiment, the power supply 70 includes a rechargeable battery. In this way, the drying device 100 can be used without being restricted by the wire harness, improving the user experience.

[0238] Specifically, the rechargeable battery can be a lithium-ion battery or other rechargeable batteries. The rechargeable battery can be one or more. Multiple batteries can be connected in series, in parallel, or in series-parallel. No specific limitation is made here. Additionally, for the convenience of battery charging, the main body 102 or the handle 104 can be provided with a charging interface. It can be understood that the charging interface can be a wired charging interface or a wireless charging interface, and no specific limitation is made here. Additionally, for the convenience of battery removal, a battery cover can be provided on the handle 104. The battery cover is removable to facilitate the removal and installation of the battery.

[0239] In one embodiment, the drying device 100 further includes a sensor that senses the state of at least one of the drying device 100, the working environment where the drying device 100 is located, the air flow, or the receiver of radiation. In this way, the operation of the drying device 100 can be controlled according to the signal of the sensor, improving the user experience.

[0240] Specifically, the state includes at least one of temperature, humidity, distance, attitude, movement, flow rate, and flux.

[0241] The sensor can include at least one of a temperature sensor, a proximity / range sensor, a humidity sensor, an attitude sensor, a flow rate sensor, and a flux sensor. The sensor can be placed, for example, on the side of the air flow outlet 404 of the housing 10 to monitor the state (such as humidity) of the object to be dried (i.e., the receiver of the air flow or radiation). The area where the air flow is applied to the object to be dried can generally include the infrared radiation area (such as the radiation spot) on the object to be dried. The air flow can accelerate the evaporation of water from the object to be dried by blowing away the moist air around the object to be dried. The air flow can also reduce the temperature of the object to be dried irradiated by the infrared radiation to prevent damage to the object to be dried. The temperature of the object to be dried and the water on the object to be dried must be maintained within an appropriate range to accelerate the evaporation of water from the object to be dried while keeping the object to be dried from overheating. The appropriate temperature range can be 50 to 60 degrees Celsius. The speed of the air flow blown onto the object to be dried can be adjusted to keep the temperature of the object to be dried within the appropriate temperature range, for example, by blowing away the hot water and excess heat. The proximity / range sensor and the temperature sensor can operate together to determine the temperature of the object to be dried and control the speed of the air flow through a feedback loop to maintain a constant temperature or a programmed temperature of the object to be dried. The object to be dried can be, for example, hair.

[0242] The attitude sensor can collect the attitude and movement of the drying device 100. For example, the attitude sensor may include an inertial detection module (IMU), which can detect the state of at least one of the roll axis, pitch axis, and yaw axis of the drying device 100, and can also detect whether it is in motion on the corresponding axis. For example, when the user blows on a part of the object to be dried for a long time, the attitude sensor detects that the drying device 100 has not moved for a long time. Then, to avoid damaging this part of the object to be dried, the control board can control the reduction of the rotation speed of the motor 20 and / or the reduction of the radiation intensity of the radiation source 30 according to the data output by the attitude sensor, and can also control the drying device 100 to give sound, light, vibration prompts, etc.

[0243] The flow sensor can detect the flow rate of the air flow, so that the control board can control the rotation speed of the motor 20 to adapt to the temperature control of the object to be dried. Similarly, the control board can also control the operation of the motor 20 and / or the radiation source 30 according to the flux data output by the flux sensor.

[0244] In one embodiment, the sensor is disposed within the housing 10 and at the air flow outlet 404 of the air duct 40 and / or the opening of the radiation source 30. Thus, more accurate control of the air flow state and / or the radiation state can be achieved.

[0245] Specifically, when the sensor is located at the air flow outlet 404 of the air duct 40, it can detect the air flow state leaving the drying device 100, such as flow rate, flux, temperature, humidity, etc., and can more accurately control the air flow state leaving the drying device 100, avoiding the influence of the internal environment of the drying device 100 on the detection of the air flow state. Similarly, when the sensor is located at the opening of the radiation source 30, it can detect the radiation state leaving the drying device 100, such as intensity, etc., and can more accurately control the radiation state leaving the drying device 100, avoiding the influence of the internal environment of the drying device 100 on the detection of the radiation state.

[0246] In summary, the drying device 100 of the above embodiment includes, but is not limited to, the following technical effects:

[0247] 1. Compared with the traditional drying device 100 (such as the entire outer wall of the reflector cup 302 being directly in the air duct 40), it dissipates too much heat, which will affect the radiation efficiency. Because excessive heat dissipation means that the light-emitting component 304 needs to convert additional electrical energy into heat energy to maintain the temperature necessary for generating blackbody radiation. The configuration of the drying device 100 in the embodiment of the present application can appropriately reduce the temperature of the radiation source 30, extend the service life of the light-emitting component 304, and at the same time, it will not reduce the temperature too low to cause waste of electrical energy (more electrical energy is used to maintain the temperature of blackbody radiation).

[0248] 2. Excess heat of the radiation source 30 is carried away by the wind, raising the wind temperature by several degrees (1 to 5 degrees). Although this is completely insufficient to have a decisive impact on drying the hair, it improves the user's perception when the wind blows on the body, preventing the user from feeling the cold wind and enhancing the user experience.

[0249] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of this application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0250] Although the embodiments of this application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of this application. The scope of this application is defined by the claims and their equivalents.

Claims

1. A drying device, characterized in that, comprising: a housing, a duct is provided inside the housing; a motor, located in the housing and used to generate an air flow in the duct; a plurality of radiation sources, housed in the housing and used to generate infrared radiation and direct the infrared radiation to the outside of the housing, the radiation source includes a reflector cup and a light-emitting element located inside the reflector cup, the light-emitting element is arranged at the focus of the reflecting surface of the reflector cup, the plurality of radiation sources are arranged in a circular ring shape, the plurality of radiation sources are integrally inclined, and the optical axes of the plurality of radiation sources converge to form a light spot at a certain distance from the air flow outlet of the duct; wherein, an avoidance portion is formed on the wall of the reflector cup, the shape of the avoidance portion is adapted to the duct and / or the housing, the avoidance portion includes a first avoidance portion, the shape of the first avoidance portion matches the contour of the duct, and the point on the first avoidance portion that is farthest from the opening of the reflector cup is located on the side of the focus of the reflecting surface of the reflector cup close to the opening of the reflector cup.

2. The drying device according to claim 1, characterized in that, the first avoidance portion is in contact with the air flow in the duct.

3. The drying device according to claim 1, characterized in that, the contour of the duct is circular with the center of the radial cross-section of the housing as the center.

4. The drying device according to claim 1, characterized in that, the avoidance portion includes a second avoidance portion, and the curvature of the second avoidance portion is different from the curvature of the first avoidance portion.

5. The drying device according to claim 4, characterized in that, the second avoidance portion is located on the side away from the duct relative to the first avoidance portion.

6. The drying device according to claim 5, characterized in that, the second avoidance portion matches the inner wall of the housing.

7. The drying device according to claim 1, characterized in that, a common portion is formed by connecting the two reflector cups of two adjacent radiation sources.

8. The drying device according to claim 1, characterized in that, the radial and axial cross-sections of the reflecting surface of the reflector cup are part of the shape of at least one polynomial curve.

9. The drying device according to claim 1, characterized in that, the different radial cross-sections of the reflecting surface of the reflector cup are non-concentric circles or non-concentric ellipses.

10. The drying device according to claim 1, characterized in that, the radial and axial cross-sections of the reflecting surface of the reflector cup are connected by segmented polynomial curves.

11. The drying device according to claim 1, characterized in that, the radiation source is located between the duct and the housing.

12. The drying device according to claim 1, characterized in that, the radiation source is surrounded by the duct.

13. The drying device according to claim 1, characterized in that, the reflector cup is configured to reduce the divergence angle of the radiation beam reflected by the light-emitting element.

14. The drying device according to claim 1, characterized in that, the side wall of the reflector cup is coupled to the duct wall.

15. The drying device according to claim 1, characterized in that, The side wall of the reflector cup is used for heat exchange with the air flow in the air duct.

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