Control method of a cosmetic device and cosmetic device

Abstract

The application discloses a beauty instrument and a control method thereof, and relates to the technical field of beauty instruments. The control method of the beauty instrument comprises the following steps: acquiring a peripheral skin temperature detected by a temperature detection member; acquiring a heat conduction temperature, which is positively correlated with the thermal resistance of a beauty head and the heating power of a heating component; the temperature of the part of skin directly opposite the heat conduction channel is the target skin temperature, and the target skin temperature is calculated by the peripheral skin temperature, a cooling temperature and the heat conduction temperature; wherein the peripheral skin temperature and the heat conduction temperature are positively correlated with the target skin temperature, and the cooling temperature is negatively correlated with the target skin temperature. The technical scheme is beneficial to improving the precision of acquiring the skin temperature of the nursing area.

Description

Technical Field

[0001] This invention relates to the field of beauty technology, and in particular to a control method for a beauty device and the beauty device itself. Background Technology

[0002] As people's living standards improve, their demands for precise temperature control in beauty devices are increasing. However, while existing beauty devices are equipped with skin temperature detection elements, they typically only detect the skin temperature around the heated area. This is especially true for phototherapy devices, where light energy needs to irradiate the skin through a channel. The light-emitting area of ​​this channel cannot accommodate temperature detection elements, making it impossible to directly detect the temperature of the area radiated by the light (the skin area directly opposite the light outlet). This results in inaccurate temperature readings from the beauty device, hindering its operation. Summary of the Invention

[0003] The main objective of this invention is to provide a control method for a beauty device, which aims to improve the accuracy of the beauty device in detecting skin temperature.

[0004] To achieve the above objectives, the present invention proposes a control method for a beauty device, wherein the beauty device includes a beauty head, the beauty head including a housing, a heating element, and a temperature detection element. The housing has a heat-conducting channel connecting the interior and exterior of the housing. The heating element is disposed inside the housing and corresponds to the heat-conducting channel, so that the heat emitted by the heating element can be radiated to the human skin through the heat-conducting channel. The temperature detection element is installed in the housing and located around the heat-conducting channel, and the temperature detection element is used to detect the skin temperature around the heat-conducting channel.

[0005] The control method of the beauty device includes:

[0006] Acquire the surrounding skin temperature detected by the temperature sensing device;

[0007] The thermal conductivity temperature is obtained, and the thermal conductivity temperature is positively correlated with the thermal resistance of the beauty head and the heating power of the heating element;

[0008] The temperature of the portion of skin directly opposite the heat conduction channel is the target skin temperature. The target skin temperature is calculated using the surrounding skin temperature, the cooling temperature, and the heat conduction temperature. The surrounding skin temperature and the heat conduction temperature are positively correlated with the target skin temperature, while the cooling temperature is inversely correlated with the target skin temperature.

[0009] Optionally, the cooling temperature is positively correlated with the cooling coefficient, the cooling coefficient is inversely correlated with the ambient temperature, and positively correlated with the airflow velocity of the environment in which the beauty device is used; and / or,

[0010] The cooling temperature is positively correlated with the product of the cooling coefficient and the heat dissipation temperature, wherein the heat dissipation temperature is inversely correlated with the heat dissipation area; and / or,

[0011] The target skin temperature is greater than the surrounding skin temperature; and / or,

[0012] The cooling temperature is obtained, and the area of ​​skin covered by the beauty device per unit time is the heat dissipation area. The cooling temperature is inversely correlated with the heat dissipation area.

[0013] Optionally, the heat conduction channel is connected to the outside of the housing through a heat conduction port, and the heat dissipation area refers to the area covered by the movement of the heat conduction port per unit time.

[0014] Optionally, the beauty device performs linear motion, and the heat dissipation area is S. 导热口 +unit time*S 导热口 *V 直线 Among them, V 直线 The moving speed of the beauty device, S 导热口 The area of ​​the heat exchanger, or...

[0015] The beauty device moves in an arc, and the heat dissipation area is S. 导热口 +unit time*S 导热口 *W 角 R, where R is the radius of the arc, W 角 S is the angular velocity of the beauty device during its arc motion. 导热口 This represents the area of ​​the heat-conducting port.

[0016] Optionally, the cooling temperature is positively correlated with the heat dissipation temperature;

[0017] The steps for obtaining the heat dissipation temperature include:

[0018] Obtain the heat dissipation area;

[0019] Compare the heat dissipation area with the preset area;

[0020] The heat dissipation area is determined to be greater than or equal to the preset area, and the cooling temperature is a first cooling value;

[0021] The heat dissipation area is determined to be smaller than the preset area, and the cooling temperature is a second cooling value; the second cooling value is greater than the first cooling value.

[0022] Optionally, the cooling temperature is positively correlated with the heat dissipation temperature, and the heat dissipation temperature is inversely correlated with the heat dissipation area;

[0023] The value of the heat dissipation temperature is: heat dissipation conversion value / heat dissipation area + C, where the heat dissipation conversion value and C are constants.

[0024] Optionally, the target skin temperature is also positively correlated with the compensation temperature, which is positively correlated with the compensation coefficient and the temperature change rate of the temperature detection element.

[0025] Optionally, the compensation temperature is positively correlated with the product of the compensation coefficient and the rate of temperature change.

[0026] Optionally, the target skin temperature is the difference between the sum of the peripheral skin temperature, the thermal conductivity temperature and the compensation temperature, and the cooling temperature. That is, target skin temperature = peripheral skin temperature + thermal conductivity temperature + compensation temperature - cooling temperature.

[0027] Optionally, the control method of the beauty device further includes:

[0028] Compare the target skin temperature with the target temperature; wherein the target temperature is the temperature required by the current beauty treatment plan;

[0029] If the target skin temperature is determined to be greater than the target temperature, the power of the heating element is reduced.

[0030] If the target skin temperature is determined to be lower than the target temperature, the power of the heating element is increased.

[0031] The present invention also proposes a beauty device, including a memory, a processor, and a control program for the beauty device stored in the memory and executable on the processor. When the processor executes the control program for the beauty device, it implements a control method for the beauty device.

[0032] The control method of the beauty device includes:

[0033] Acquire the surrounding skin temperature detected by the temperature sensing device;

[0034] The cooling temperature is obtained, and the area of ​​skin covered by the beauty device per unit time is the heat dissipation area. The cooling temperature is inversely correlated with the heat dissipation area.

[0035] The thermal conductivity temperature is obtained, and the thermal conductivity temperature is positively correlated with the thermal resistance of the beauty head and the heating power of the heating element;

[0036] The temperature of the portion of skin directly opposite the heat conduction channel is the target skin temperature. The target skin temperature is calculated using the surrounding skin temperature, the cooling temperature, and the heat conduction temperature. The surrounding skin temperature and the heat conduction temperature are positively correlated with the target skin temperature, while the cooling temperature is inversely correlated with the target skin temperature.

[0037] In the technical solution of this invention, the beauty device has a heat conduction channel. When the beauty device is working, the two ends of the heat conduction channel are the heating element and the human skin, respectively, so that the heating element transfers heat to the human skin through two heat conduction paths. In the process of calculating the target skin temperature of the treatment area, the peripheral skin temperature detected by the temperature detection device and the heat conduction temperature are first obtained respectively. Then, the peripheral skin temperature and the heat conduction temperature are set to be positively correlated with the target skin temperature, that is, the higher the peripheral skin temperature and the heat conduction temperature, the higher the target skin temperature.

[0038] Among them, the thermal conductivity temperature is positively correlated with the thermal resistance of the beauty head and the heating power of the heating element. That is, in the process of calculating the target skin temperature, not only are the two different thermal conduction paths through which the heating element transfers heat to the human skin considered, but also the influence of the two thermal conduction paths on the skin temperature (different thermal resistances) and the influence of the heating element's power on the thermal conduction of the two thermal conduction paths are fully considered, thereby further improving the calculation accuracy of the target skin temperature. Thus, this application significantly improves the accuracy of obtaining the target skin temperature of the beauty device treatment area by calculating the target skin temperature through the surrounding skin temperature and thermal conductivity temperature, which is conducive to improving the working accuracy of the beauty device. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the structure of one embodiment of the beauty device of the present invention;

[0041] Figure 2 This is a schematic diagram of another embodiment of the beauty device of the present invention;

[0042] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at point AA;

[0043] Figure 4 This is a flowchart illustrating an embodiment of the control method for the beauty device of the present invention;

[0044] Figure 5 This is a flowchart illustrating another embodiment of the control method for the beauty device of the present invention;

[0045] Figure 6 This is a schematic diagram of another embodiment of the beauty device of the present invention.

[0046] Explanation of icon numbers:

[0047] label name label name 10 Beauty head 100 case 200 Temperature sensing element 300 Isolation components 500 Heat conduction channel 510 Heat conduction port 600 Heating components

[0048] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0050] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0051] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the term "and / or" throughout the text includes three solutions; taking A and / or B as an example, it includes technical solution A, technical solution B, and a technical solution that simultaneously satisfies A and B. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0052] This invention primarily proposes a control method for a beauty device, mainly applied to beauty devices with a heat conduction channel 500 (through which heat is conducted to the human skin), to increase the accuracy of the beauty device in detecting human skin temperature. The beauty device with the heat conduction channel 500 can be a hair removal device, a phototherapy device, or a phototherapy device. During the use of the beauty device, the heat generated by the internal heating element 600 is actively or passively transferred to the human skin through the heat conduction channel 500, mostly to the skin being treated. The heating element 600 can be a lamp tube, LED beads, or other heating components. The method used in this application to increase the accuracy of detecting human skin temperature mainly involves fully considering factors such as heat loss and the heat conduction of the beauty device, combined with the temperature detected by the temperature sensor 200, to calculate a more accurate skin temperature than the detected temperature.

[0053] The following will mainly describe the specific details of the control method for the beauty device.

[0054] Reference Figures 1 to 6 In this embodiment of the invention, the control method of the beauty device includes:

[0055] The beauty device includes a beauty head 10, which comprises a housing 100, a heating element 600, and a temperature sensing element 200. The housing 100 has a heat-conducting channel 500 connecting the interior and exterior of the housing 100. The heating element 600 is disposed inside the housing 100 and corresponds to the heat-conducting channel 500, so that the heat emitted by the heating element 600 can be radiated to the human skin through the heat-conducting channel 500. The temperature sensing element 200 is installed in the housing 100 and located around the heat-conducting channel 500, and is used to detect the skin temperature around the heat-conducting channel 500.

[0056] The control method of the beauty device includes:

[0057] S100: Acquire the surrounding skin temperature detected by the temperature detection element 200;

[0058] S300, Obtain the thermal conductivity temperature, which is positively correlated with the thermal resistance of the beauty head 10 and the heating power of the heating element 600;

[0059] S400, the temperature of the portion of skin directly opposite the heat conduction channel 500 is the target skin temperature. The target skin temperature is calculated using the surrounding skin temperature, the cooling temperature, and the heat conduction temperature. The surrounding skin temperature and the heat conduction temperature are positively correlated with the target skin temperature, while the cooling temperature is negatively correlated with the target skin temperature.

[0060] Specifically, in this embodiment, the beauty head 10 can take many forms, such as being integrated with the main body or being detachable from it; no particular limitation is made here. It is worth noting that the housing 100 of the beauty head 10 can also be the housing 100 of a beauty device in some embodiments. The overall shape of the housing 100 can vary depending on the type of beauty device and the actual working conditions. The heating element 600 can take many forms, such as a lamp tube, light bulb, heating element, etc.; no particular limitation is made here. Taking a lamp tube as an example, the heating element 600 can be a primary treatment component or an auxiliary treatment component. The temperature sensing element 200 can be a temperature sensor, which can take many forms, such as a thermocouple (using two different metal conductors connected to form a circuit, with the temperature difference generating a Seebeck voltage), a resistance temperature detector (using the linear change of metal resistance with temperature), a semiconductor temperature sensor (using the relationship between PN junction voltage / current and temperature), an infrared temperature sensor, etc. No specific limitation is made here. To improve the detection accuracy, a thermistor, which uses the exponential change of semiconductor resistance with temperature, is used as an example. Examples include NTC (resistance decreases with increasing temperature) and PTC (resistance increases with increasing temperature). For ease of description in the following embodiments, the temperature sensing element 200 is an NTC (Negative Temperature Coefficient) semiconductor temperature sensor.

[0061] The heat-conducting channel 500 of the housing 100 refers to the channel through which the heating element 600 can transfer heat to the skin being treated. This heat-conducting channel 500 can be a straight channel or a channel with a certain curvature, with the heating element 600 at one end and the skin being treated at the other. It is worth noting that heat can be directly transferred to the human skin through the heat-conducting channel 500. In some embodiments, an insulating component 300, such as a sapphire plate, ruby ​​plate, or optical glass, can be provided at the light outlet (i.e., the heat-conducting port 510, the port of the heat-conducting channel 500 near the human skin, or the port where the heat-conducting channel 500 connects to the outside of the housing 100). In this case, some of the heat needs to be conducted to the skin through the insulating component.

[0062] Regarding the understanding that the temperature sensing element 200 is installed on the periphery of the heat conduction channel 500, the term "periphery" can be used in a broad sense. For example, the heat conduction channel 500 can be considered as a space with a columnar overall shape, enclosed by side walls. Then, the radial periphery of the heat conduction channel 500 (the annular periphery, such as the periphery of the heat conduction port 510) and the end of the heat conduction channel 500 (near the end of the heat conduction channel 500 near the heating element 600) can both be understood as the periphery of the heat conduction channel 500. Of course, multiple temperature sensing elements 200 can be set, allowing simultaneous temperature detection at multiple locations. Taking the housing 100 surrounding the heat conduction port 510 as an example, the selected temperature parameter can be based on the purpose of the current parameter acquisition. For example, to prevent burns to the user from high temperatures, the highest NTC temperature can be selected as the skin periphery temperature detected by the temperature sensing element 200.

[0063] The thermal conductivity temperature is a compensation temperature for the skin temperature surrounding the thermal conduction channel 500. Heat is transferred from the heating element 600 to the human skin via at least two thermal conduction paths. The first path is through the thermal conduction channel 500, a rapid conduction with minimal obstruction. The second path is through the components of the beauty head 10 (heat is first transferred from the heating element 600 to the components of the beauty head 10, and then the components transfer the heat to the human skin). This second path involves greater thermal resistance. The first thermal conduction path corresponds to the beauty care area, which is the area where we need to calculate the temperature. The second thermal conduction path corresponds to the area surrounding the beauty care area, which is the area where we detect the temperature using NTC. In the second thermal conduction path, the greater the resistance of the components to heat conduction (greater thermal resistance), the lower the detected surrounding skin temperature, and the greater the difference between this temperature and the target skin temperature conducted through the first thermal conduction path, requiring a greater temperature compensation. Conversely, in the second thermal conduction path, the smaller the resistance of the components to heat conduction (lower thermal resistance), the higher the detected surrounding skin temperature, and the smaller the difference between this temperature and the target skin temperature conducted through the first thermal conduction path, requiring a smaller temperature compensation. Therefore, the thermal conductivity temperature is positively correlated with the thermal resistance of the beauty head 10.

[0064] Simultaneously, the thermal conductivity temperature is also related to the power of the heating element 600. The higher the power of the heating element 600, the more heat it releases per unit time. Therefore, more heat is obstructed and lost during the heat transfer process through the second thermal conduction path, resulting in a larger difference between the detected peripheral skin temperature and the target skin temperature, requiring a higher thermal conductivity temperature to compensate. Conversely, the lower the power of the heating element 600, the less heat it releases per unit time. Therefore, less heat is obstructed and lost during the heat transfer process through the second thermal conduction path, resulting in a smaller difference between the detected peripheral skin temperature and the target skin temperature, requiring a lower thermal conductivity temperature to compensate. Therefore, the thermal conductivity temperature is positively correlated with the power of the heating element 600.

[0065] It's worth noting that the thermal resistance of the beauty head 10 can be measured using a thermal conduction experiment. For example, immerse the beauty head 10 in water at a preset temperature (e.g., any temperature between 40℃ and 60℃) for a preset time (e.g., 1 minute to 5 minutes), then measure its internal temperature. The thermal resistance can be obtained based on the preset temperature, the measured temperature, and the immersion time. Alternatively, after immersing the beauty head 10 in water at a preset temperature, observe how long it takes for the internal temperature of the beauty head 10 to reach the preset temperature.

[0066] It is understood that in this embodiment, the order in which step S100 obtains the surrounding skin temperature detected by the temperature detection device 200 and step S300 obtains the thermal conductivity temperature is not limited; that is, either step can be performed first, or both steps can be performed simultaneously. In some embodiments, to improve calculation efficiency, the simultaneous execution of both steps is taken as an example.

[0067] In this embodiment, the beauty device has a heat conduction channel 500. When the beauty device is working, the two ends of the heat conduction channel 500 are the heating element 600 and the human skin, respectively, so that the heating element 600 transfers heat to the human skin through two heat conduction paths. In the process of calculating the target skin temperature of the treatment area, the peripheral skin temperature detected by the temperature detection element 200 and the heat conduction temperature are first obtained respectively. Then, the peripheral skin temperature and the heat conduction temperature are set to be positively correlated with the target skin temperature, that is, the higher the peripheral skin temperature and the heat conduction temperature, the higher the target skin temperature.

[0068] Among them, the thermal conductivity temperature is positively correlated with the thermal resistance of the beauty head 10 and the heating power of the heating element 600. That is, in the process of calculating the target skin temperature, not only are the two different thermal conduction paths through which the heating element 600 transfers heat to the human skin considered, but also the influence of the two thermal conduction paths on the skin temperature (different thermal resistances) and the influence of the power of the heating element 600 on the thermal conduction of the two thermal conduction paths are fully considered, thereby further improving the calculation accuracy of the target skin temperature. Thus, this application significantly improves the accuracy of obtaining the target skin temperature of the beauty device treatment area by calculating the target skin temperature through the surrounding skin temperature and thermal conductivity temperature, which is conducive to improving the working accuracy of the beauty device.

[0069] In some embodiments, to further improve the accuracy of acquiring the target skin temperature, the control method further includes:

[0070] S200. Obtain the cooling temperature. The skin area covered by the beauty device per unit time is the heat dissipation area. The cooling temperature is inversely correlated with the heat dissipation area.

[0071] Specifically, in this embodiment, cooling temperature refers to the temperature change of the user's skin per unit time. Normally, during beauty treatments or skincare, the skin temperature is higher than the ambient temperature. At this time, heat on the skin dissipates to the surrounding environment under the influence of thermal potential energy (heat conduction from high temperature to low temperature), thus lowering the skin temperature. The skin area covered by the beauty device per unit time is the area traversed or covered by the treatment area per unit time during the device's operation. When the beauty device is stationary, the treatment area is stationary, and its area is a fixed value. For example, if the treatment area is rectangular, 2 cm long and 1.5 cm wide, the area is 3 square centimeters. During the beauty treatment, the beauty device moves, and the treatment area moves with it. The total area covered by the treatment area during the movement per unit time is the skin area covered by the beauty device per unit time. For example, if the beauty device moves 1.5 cm in 0.1 seconds, the skin area covered in 0.1 seconds is 6 square centimeters [2 cm * (1.5 cm + 1.5 cm)].

[0072] With a constant power output, the amount of heat output per unit time is fixed. A larger heat dissipation area per unit time means a larger area of ​​skin is affected by the device, resulting in less heat absorption per unit area and thus a lower skin temperature. As the skin loses heat, a lower skin temperature means less heat is lost per unit time, leading to smaller temperature changes and a lower cooling temperature.

[0073] Conversely, with a constant power output from the beauty device, the amount of heat output per unit time is fixed. A smaller heat dissipation area per unit time means a smaller area of ​​skin is affected by the device. Therefore, each unit area of ​​skin absorbs more heat radiated from the device, resulting in a higher skin temperature. As the skin loses heat, the higher the skin temperature, the more heat is dissipated per unit time, leading to greater temperature changes and, consequently, a higher cooling temperature.

[0074] It is understood that in this embodiment, step S100 acquires the surrounding skin temperature detected by the temperature detection device 200; step S200 acquires the cooling temperature; and step S300 acquires the thermal conductivity temperature. The order of these three steps is not limited; that is, any one of the steps can be performed first, or all three steps can be performed simultaneously. In some embodiments, to improve calculation efficiency, the simultaneous execution of all three steps is taken as an example. The cooling temperature is set to be inversely correlated with the target skin temperature, that is, the higher the cooling temperature, the lower the target skin temperature.

[0075] In this embodiment, the beauty device has a heat conduction channel 500. When the beauty device is working, the two ends of the heat conduction channel 500 are the heating element 600 and the human skin, respectively, so that the heating element 600 transfers heat to the human skin through two heat conduction paths. In the process of calculating the target skin temperature of the treatment area, the peripheral skin temperature detected by the temperature detection element 200, the cooling temperature, and the heat conduction temperature are first obtained respectively. Then, the peripheral skin temperature and the heat conduction temperature are set to be positively correlated with the target skin temperature, that is, the higher the peripheral skin temperature and the heat conduction temperature, the higher the target skin temperature. The cooling temperature is set to be inversely correlated with the target skin temperature, that is, the higher the cooling temperature, the lower the target skin temperature.

[0076] Among them, the cooling temperature is inversely correlated with the heat dissipation area, which is the area of ​​skin covered by the beauty device per unit time. That is, in the process of calculating the target skin temperature, not only the heat dissipation of the skin is taken into account, but also the impact of the movement of the beauty device on the heat dissipation of the skin. Thus, the calculation accuracy of the target skin temperature is greatly improved. In combination with the above embodiments, this application significantly improves the accuracy of obtaining the target skin temperature of the beauty device treatment area by calculating the target skin temperature through the surrounding skin temperature, cooling temperature and thermal conductivity temperature, which is conducive to improving the working accuracy of the beauty device.

[0077] In some embodiments, to further improve the accuracy of obtaining the target skin temperature, the cooling temperature is positively correlated with the cooling coefficient, the cooling coefficient is negatively correlated with the ambient temperature, and positively correlated with the airflow rate of the environment in which the beauty device is used.

[0078] In this embodiment, a cooling coefficient is introduced, which refers to the influence of the working environment on the cooling temperature under the working conditions of the beauty device. The higher the current ambient temperature, the smaller the temperature difference between the skin and the current ambient temperature, the slower the skin dissipates heat, the smaller the heat dissipation per unit time, the smaller the cooling coefficient, and the lower the cooling temperature. Conversely, the lower the current ambient temperature, the larger the temperature difference between the skin and the current ambient temperature, the faster the skin dissipates heat, the greater the heat dissipation per unit time, the larger the cooling coefficient, and the higher the cooling temperature. Therefore, the cooling coefficient is inversely correlated with the ambient temperature.

[0079] The lower the air velocity in the current environment, the slower the skin dissipates heat, the smaller the amount of heat dissipated by the skin per unit time, and the lower the cooling temperature; conversely, the higher the air velocity in the current environment, the faster the skin dissipates heat, the greater the amount of heat dissipated by the skin per unit time, the greater the cooling coefficient, and the greater the cooling temperature; therefore, the cooling coefficient is positively correlated with air velocity.

[0080] In this embodiment, by introducing a cooling coefficient, the influence of ambient temperature and airflow velocity on cooling temperature is fully considered, thereby further improving the accuracy of obtaining target skin temperature.

[0081] In some embodiments, to further improve the accuracy of obtaining the target skin temperature, the cooling temperature is positively correlated with the product of the cooling coefficient and the heat dissipation temperature, while the heat dissipation temperature is inversely correlated with the heat dissipation area. In this embodiment, the current working environment and heat dissipation area are comprehensively considered; that is, not only the current working environment and skin heat dissipation are taken into account, but also the relationship between the current working environment and skin heat dissipation, and even the heat dissipation of the skin during the operation of the beauty device. This significantly improves the accuracy of calculating the target skin temperature.

[0082] It is worth noting that, under normal circumstances, the efficiency of heat conduction by the heating element 600 through the heat conduction channel 500 is higher than that of heat conduction by the components of the beauty head 10. Therefore, the target skin temperature is usually higher than the surrounding skin temperature.

[0083] In some embodiments, to more accurately calculate the heat dissipation area, the port of the heat conduction channel 500 adjacent to the housing 100 is designated as a heat conduction port 510, and the heat dissipation area refers to the area covered by the heat conduction port 510 moving per unit time. Specifically, in this embodiment, the heat conduction port 510 corresponds to the care area in the above embodiment, that is, the human skin area corresponding to the heat conduction port 510 is the care area. The area of ​​the care area is the area of ​​the heat conduction port 510. A simple calculation of the heat dissipation area can be referred to the above embodiment, and will not be repeated here.

[0084] However, in actual operation of beauty devices, there are various ways to move the device, and different movement methods require different calculations of the heat dissipation area. Two examples are given below to illustrate this.

[0085] In some embodiments, the beauty device performs linear motion, and the heat dissipation area is: S 导热口510 +unit time*S 导热口510 *V 直线 Among them, V 直线 The moving speed of the beauty device, S 导热口510 This refers to the area of ​​the heat conduction port 510.

[0086] In this embodiment, the specific form of the unit time can be varied, such as 0.1 seconds, 0.2 seconds, 1 second, etc., and no special limitation is made here. For ease of explanation, the above embodiment will be continued with an example. The heat conduction port 510 is a rectangular opening with a length of 2 cm and a width of 1.5 cm. The area S of the heat conduction port 510 is... 导热口510 It measures 3 square centimeters. During the beauty treatment, the moving speed V of the beauty device... 直线 The speed is 15 cm / s. When the beauty device moves along the width of the heat conduction port 510, it can move 1.5 cm in 0.1 seconds, which is exactly the area of ​​one heat conduction port 510. At this time, the heat dissipation area is 6 square centimeters. Meanwhile, from the above calculation method for the heat dissipation area, V... 直线 The larger the surface area, the larger the heat dissipation area, and the smaller the cooling temperature value; V 直线 The smaller the area, the smaller the heat dissipation area, and the higher the cooling temperature.

[0087] In other embodiments, the beauty device performs an arc-shaped motion, with a heat dissipation area of ​​S. 导热口510 +unit time*S 导热口510 *W 角 R, where R is the radius of the arc. In this embodiment, with the radius R remaining constant, the angular velocity W of the beauty device in circular motion is... 角 The larger the surface area, the faster the rotation, the larger the heat dissipation area, and the lower the cooling temperature; the angular velocity W of the beauty device in circular motion 角 The smaller the value, the slower the rotation, the smaller the heat dissipation area, and the higher the cooling temperature.

[0088] Similarly, at angular velocity W 角 Under the same conditions, the larger the radius R of the arc when the beauty device makes circular motion, the larger the circle of the motion trajectory, the larger the heat dissipation area, and the smaller the cooling temperature value; the smaller the radius R of the arc when the beauty device makes circular motion, the smaller the circle of the motion trajectory, the smaller the heat dissipation area, and the larger the cooling temperature value.

[0089] There are several ways to obtain the heat dissipation temperature based on the heat dissipation area. The heat dissipation temperature can be continuous or discrete. Specific examples are given below.

[0090] Regarding discrete heat dissipation temperature, in some embodiments;

[0091] The steps to obtain the heat dissipation temperature include:

[0092] Obtain the heat dissipation area;

[0093] Compare the heat dissipation area with the preset area;

[0094] The heat dissipation area is determined to be greater than or equal to the preset area, and the cooling temperature is the first cooling value.

[0095] If the heat dissipation area is less than the preset area, the cooling temperature is the second cooling value; if the second cooling value is greater than the first cooling value.

[0096] Specifically, in this embodiment, the calculation method for the heat dissipation area is the same as in the embodiment above, and will not be repeated here. The preset area can be set based on empirical values; it can also be set based on big data such as face area and beauty techniques; of course, in some embodiments, it can also be obtained through a large model of human skin and processed by artificial intelligence. When the heat dissipation area is greater than or equal to the preset area, the current movement mode of the beauty device is determined to be a large heat dissipation area movement, and the cooling temperature should be taken as the smaller value (first cooling value). When the heat dissipation area is less than the preset area, the current movement mode of the beauty device is determined to be a small heat dissipation area movement, and the cooling temperature should be taken as the larger value (second cooling value).

[0097] The first and second cooling values ​​can be empirical values ​​or values ​​obtained by running a large skin model with input data. There are many possible data values, which are not specifically limited here. For example, if the first cooling value is 3.5℃, the second cooling value can be 4.2℃; if the first cooling value is 0.2℃, the second cooling value can be 1.2℃.

[0098] It is worth noting that in other embodiments, the discrete cooling temperature may include three temperature values, or even more temperature values, etc., without special limitation, such as a third cooling value, a fourth cooling value, etc.

[0099] In this embodiment, by setting the cooling temperature to a discrete temperature, the corresponding cooling temperature can be obtained after calculating the heat dissipation area and comparing it with the preset area, making the entire transportation logic very simple.

[0100] Regarding continuous heat dissipation temperature, in some embodiments, the cooling temperature is positively correlated with the heat dissipation temperature, and the heat dissipation temperature is inversely correlated with the heat dissipation area; the value of the heat dissipation temperature is: heat dissipation conversion value / heat dissipation area + C, where the heat dissipation conversion value and C are constants.

[0101] Specifically, in this embodiment, the heat dissipation conversion value is the relationship between heat dissipation area and heat dissipation temperature; that is, a larger heat dissipation area results in a smaller heat dissipation temperature. The constant C is a compensation value for the heat dissipation temperature. Both the heat dissipation conversion value and the constant C are constants, which can be obtained through AI calculation based on a large skin model. In some embodiments, they can also be adjusted to repeatedly verify the difference between the calculated target skin temperature and the actual skin temperature; that is, by adjusting the heat dissipation conversion value and the constant C, the difference between the calculated target skin temperature and the actual skin temperature is reduced. Thus, in this embodiment, the heat dissipation temperature and heat dissipation area are continuously correlated, with different heat dissipation areas corresponding to different heat dissipation temperatures, thereby making the calculated target skin temperature closer to the actual skin temperature of the treatment area.

[0102] In some embodiments, to further improve the accuracy of obtaining the target skin temperature, the target skin temperature is also positively correlated with the compensation temperature, which is positively correlated with the compensation coefficient and the temperature change rate of the temperature sensor 200.

[0103] Specifically, in this embodiment, the temperature change rate of the temperature detection element 200 is the magnitude of the temperature change of the temperature detection element 200 per unit time, which is also the magnitude of the change in the surrounding skin temperature per unit time. The larger the temperature change rate, the greater the increase in the surrounding skin temperature per unit time, indicating a greater thermal impact and a faster heat transfer speed. This results in a larger difference between the heat energy transferred through the heat conduction channel 500 and the heat energy conducted through the components of the beauty head 10 per unit time. Therefore, a larger compensation temperature is required.

[0104] Conversely, the smaller the temperature change rate, the less the surrounding skin temperature rises per unit time, indicating a smaller thermal impact and a slower heat transfer rate. This results in a smaller difference between the heat energy transferred through the heat conduction channel 500 and the heat energy conducted through the components of the beauty head 10 per unit time. Therefore, only a small compensation temperature needs to be provided.

[0105] The compensation coefficient is set to a constant when the beauty device is manufactured. This compensation coefficient can be obtained by AI calculation based on a large skin model. In some embodiments, it can also be adjusted to repeatedly verify the difference between the calculated target skin temperature and the actual skin temperature. That is, by adjusting the compensation coefficient, the difference between the calculated target skin temperature and the actual skin temperature can be reduced.

[0106] In this embodiment, the target skin temperature is compensated by taking into account the temperature compensation temperature, that is, the temperature change rate. This more comprehensively considers the factors affecting the target skin temperature, making the calculated target skin temperature closer to the actual skin temperature of the treatment area.

[0107] In some embodiments, to further improve the accuracy of obtaining the target skin temperature, the compensation temperature is positively correlated with the product of the compensation coefficient and the rate of temperature change.

[0108] Regarding the specific calculation of the target skin temperature, the value of the target skin temperature is: the sum of the peripheral skin temperature, thermal conductivity temperature and compensation temperature, and the difference between the target skin temperature and the cooling temperature. That is, target skin temperature = peripheral skin temperature + thermal conductivity temperature + compensation temperature - cooling temperature.

[0109] Specifically, in this embodiment, the target skin temperature fully considers the surrounding skin temperature, thermal conductivity temperature, compensation temperature, and cooling temperature, taking into full account the many factors affecting the target skin temperature, which helps to significantly improve the accuracy of the target skin temperature. A concrete example illustrates the calculation of the target skin temperature. For instance, after measurement and calculation, the surrounding skin temperature is 35℃, the thermal conductivity temperature is 3.5℃, the compensation temperature is 2.5℃, and the cooling temperature is 2℃. Then, the value of the target skin temperature is:

[0110] 35℃ + 3.5℃ + 2.5℃ - 2℃ = 39℃.

[0111] In some embodiments, in order to efficiently and safely adjust the temperature of the beauty device to the desired treatment temperature (target temperature), the control method of the beauty device further includes:

[0112] S500, compare the target skin temperature with the target temperature; where the target temperature is the temperature required for the current beauty treatment.

[0113] S600: If the target skin temperature is determined to be greater than the target temperature, control the power of the heating element 600 to be reduced.

[0114] S700: If the target skin temperature is determined to be lower than the target temperature, control the power of the heating element 600 to increase.

[0115] Specifically, in this embodiment, the target skin temperature is compared with the target temperature. If the target skin temperature is greater than the target temperature, it indicates that the temperature of the skin in the current treatment area is too high. The power of the heating element 600 needs to be reduced to lower the temperature of the skin in the treatment area, ensuring the beauty and treatment effects while avoiding skin damage from excessive heat. If the target skin temperature is less than the target temperature, it indicates that the temperature of the skin in the current treatment area is insufficient and cannot meet the temperature requirements of the current beauty program. In this case, the power of the heating element 600 needs to be increased to raise the temperature of the skin in the treatment area, allowing the beauty device to better execute the current beauty program and improve the beauty effect.

[0116] This application further proposes a beauty device, including a memory, a processor, and a control program for the beauty device stored in the memory and executable on the processor. When the processor executes the control program, it implements the control method for the beauty device described in the above embodiments. The beauty device uses the control method, the specific logic of which refers to the above embodiments. Since the beauty device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here.

[0117] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A beauty device, characterized in that, The beauty device includes a beauty head, which includes a housing, a heating element, and a temperature sensing element. The housing has a heat conduction channel connecting the inside and outside of the housing. The heating element is disposed inside the housing and corresponds to the heat conduction channel, so that the heat emitted by the heating element can be radiated to the human skin through the heat conduction channel. The temperature sensing element is installed on the housing and located on the periphery of the heat conduction channel. The temperature sensing element is used to detect the skin temperature around the heat conduction channel. The control method of the beauty device includes: Acquire the surrounding skin temperature detected by the temperature sensing device; The thermal conductivity temperature is obtained, and the thermal conductivity temperature is positively correlated with the thermal resistance of the beauty head and the heating power of the heating element; The temperature of the skin directly opposite the heat conduction channel is the target skin temperature. The target skin temperature is calculated using the surrounding skin temperature, the cooling temperature, and the heat conduction temperature. The surrounding skin temperature and the target skin temperature are positively correlated, as are the heat conduction temperature and the target skin temperature, while the cooling temperature is inversely correlated. The cooling temperature refers to the temperature change of the user's skin per unit time during the beauty or treatment process. The heat conduction temperature is a temperature used to compensate for the skin temperature surrounding the heat conduction channel.

2. The beauty device as described in claim 1, characterized in that, The cooling temperature is positively correlated with the cooling coefficient, the cooling coefficient is inversely correlated with the ambient temperature, and positively correlated with the airflow velocity in the environment where the beauty device is used; and / or, The cooling temperature is positively correlated with the product of the cooling coefficient and the heat dissipation temperature, wherein the heat dissipation temperature is inversely correlated with the heat dissipation area; and / or, The target skin temperature is greater than the surrounding skin temperature; and / or, The cooling temperature is obtained, and the area of ​​skin covered by the beauty device per unit time is the heat dissipation area. The cooling temperature is inversely correlated with the heat dissipation area.

3. The beauty device as described in claim 1, characterized in that, The area of ​​skin covered by the beauty device per unit time is the heat dissipation area, and the cooling temperature is inversely correlated with the heat dissipation area. The port of the heat conduction channel near the outside of the housing is the heat conduction port, and the heat dissipation area refers to the area covered by the movement of the heat conduction port per unit time.

4. The beauty device as described in claim 3, characterized in that, The beauty device moves in a linear motion, and the heat dissipation area is [missing information]. S 导热口 +unit time S 导热口 V 直线 ; in, V 直线 The moving speed of the beauty device S 导热口 The area of ​​the heat exchanger, or... The beauty device moves in an arc, and the heat dissipation area is... S 导热口 +unit time S 导热口 W 角 R, where R is the radius of the arc. W 角 The angular velocity of the beauty device during its arc-shaped motion. S 导热口 This represents the area of ​​the heat-conducting port.

5. The beauty device as described in claim 1, characterized in that, The cooling temperature is positively correlated with the heat dissipation temperature; The steps for obtaining the heat dissipation temperature include: Obtain the heat dissipation area; Compare the heat dissipation area with the preset area; The heat dissipation area is determined to be greater than or equal to the preset area, and the cooling temperature is a first cooling value; The heat dissipation area is determined to be smaller than the preset area, and the cooling temperature is a second cooling value; the second cooling value is greater than the first cooling value.

6. The beauty device as described in claim 1, characterized in that, The cooling temperature is positively correlated with the heat dissipation temperature, and the heat dissipation temperature is inversely correlated with the heat dissipation area. The value of the heat dissipation temperature is: heat dissipation conversion value / heat dissipation area + C, where the heat dissipation conversion value and C are constants.

7. The beauty device as described in claim 1, characterized in that, The target skin temperature is also positively correlated with the compensation temperature, which is positively correlated with the compensation coefficient and the temperature change rate of the temperature detection element.

8. The beauty device as described in claim 7, characterized in that, The compensation temperature is positively correlated with the product of the compensation coefficient and the rate of temperature change.

9. The beauty device as described in claim 7, characterized in that, The target skin temperature is the difference between the sum of the peripheral skin temperature, the thermal conductivity temperature and the compensation temperature, and the cooling temperature. That is, target skin temperature = peripheral skin temperature + thermal conductivity temperature + compensation temperature - cooling temperature.

10. The beauty device according to any one of claims 1 to 9, characterized in that, The control method for the beauty device also includes: Compare the target skin temperature with the target temperature; wherein the target temperature is the temperature required by the current beauty treatment plan; If the target skin temperature is determined to be greater than the target temperature, the power of the heating element is reduced. If the target skin temperature is determined to be lower than the target temperature, the power of the heating element is increased.

11. A beauty device, characterized in that, The device includes a memory, a processor, and a control program for the beauty device stored in the memory and executable on the processor. When the processor executes the control program for the beauty device, it implements the control method for the beauty device according to any one of claims 1-10.

Images