Temperature control method, system and radio frequency beauty instrument based on load feedback

Abstract

The present disclosure provides a load feedback-based temperature control method, system, and radio frequency beauty device. The method comprises: obtaining a temperature control curve for an electrode of the radio frequency beauty device during a preset time period, the temperature control curve being a curve showing changes in the electrode's target temperature and radio frequency time; obtaining a target temperature of the electrode during the i-th control period based on the temperature control curve; detecting the real-time temperature of the electrode during the i-th control period to obtain information on the difference between the target temperature and the real-time temperature; the i-th control period being one of the preset time periods; and adjusting operating parameters of the radio frequency beauty device during the i+1th control period based on the difference information; the operating parameters including at least one of the following: radio frequency power and radio frequency frequency. The temperature control method provided by the present application can improve the accuracy of temperature control of the beauty device.

Description

Technical Field

[0001] The present disclosure relates to the technical field of beauty instruments, and in particular to a temperature control method and system based on load feedback and a radio frequency beauty instrument. Background Art

[0002] A radio frequency beauty device is an instrument that uses radio frequency energy with a specific waveform to act on human skin. When in use, the radio frequency output electrodes act on the human skin to generate radio frequency current, causing conduction current and displacement current to flow through the skin, forming internal heating, thereby achieving the effect of skin care.

[0003] When the radio frequency current passes through the epidermis and reaches the dermis and is blocked by the resistance of cell tissue, the high-frequency oscillation generates heat energy to denature the collagen in the dermis, thereby stimulating the body's healing mechanism and allowing elastic fiber cells to produce new collagen.

[0004] Collagen is the main substance in the dermis of the skin. The temperature range for collagen reorganization and regeneration is 45°C-55°C, while the human epidermis will show signs of burns above 43°C. Skin damage is an exponential function of temperature, and it is challenging to reach the maximum critical value within the temperature range without damaging the skin.

[0005] In related technologies, RF beauty devices are limited by factors such as the temperature sensor's installation location, the temperature conduction structure, the sensor's characteristics, the heat capacity and thermal conductivity of the heat-conducting medium, and so on. Consequently, the temperature sensor cannot accurately and promptly reflect the true temperature of the human epidermis. RF heating based on inaccurate temperature data can cause burns to skin tissue. Therefore, improving the accuracy of temperature control in RF beauty devices has become a critical issue that needs to be addressed. Summary of the Invention

[0006] To overcome the problems existing in the related art, the embodiments of the present disclosure provide a temperature control method, system and radio frequency beauty instrument based on load feedback.

[0007] In a first aspect, the present application provides a temperature control method based on load feedback, which is applied to a radio frequency beauty instrument. The method includes: obtaining a temperature control curve of an electrode of the radio frequency beauty instrument in a preset time period, wherein the temperature control curve is a curve of a change in the target temperature and radio frequency time of the electrode; obtaining the target temperature of the electrode in the i-th control period according to the temperature control curve; detecting the real-time temperature of the electrode in the i-th control period, and obtaining difference information between the target temperature and the real-time temperature; the i-th control period belongs to a time period in the preset time period; adjusting the operating parameters of the radio frequency beauty instrument in the i+1-th control period according to the difference information; the operating parameters include at least one of the following: radio frequency power and radio frequency frequency.

[0008] In a second aspect, the present application provides a temperature control system based on load feedback, which is applied to a radio frequency beauty instrument. The system includes: an acquisition module for obtaining a temperature control curve of an electrode of the radio frequency beauty instrument in a preset time period, where the temperature control curve is a curve of a change in the target temperature and radio frequency time of the electrode; obtaining the target temperature of the electrode in the i-th control period according to the temperature control curve; a processing module for detecting the real-time temperature of the electrode in the i-th control period and obtaining difference information between the target temperature and the real-time temperature; the i-th control period belongs to one of the preset time periods; a control module for adjusting the operating parameters of the radio frequency beauty instrument in the i+1-th control period according to the difference information; the operating parameters include at least one of the following: radio frequency power and radio frequency frequency.

[0009] In a third aspect, the present application provides a radio frequency beauty instrument comprising a memory and a processor; the memory is used to store computer instructions; and the processor is used to execute any of the temperature control methods described above.

[0010] The load feedback-based temperature control method provided in this application uses the target electrode temperature as the control target and employs a PID control method. Based on the difference between the electrode's real-time temperature and the target temperature during the i-th control cycle, the operating parameters of the radiofrequency beauty device during the (i+1) control cycle are adjusted, causing the electrode temperature to dynamically change along a set temperature control curve. This improves the accuracy of the radiofrequency beauty device's temperature control.

[0011] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0013] Figure 1 A flow chart of a temperature control method provided in an embodiment of the present application.

[0014] Figure 2 This is a schematic diagram of the structure of the radio frequency beauty instrument provided in an embodiment of the present application.

[0015] Figure 3 The temperature control curve provided in the embodiment of the present application is shown in FIG. Figure 1 .

[0016] Figure 4 The temperature control curve provided in the embodiment of the present application is shown in FIG. Figure 2 .

[0017] Figure 5The temperature control curve provided in the embodiment of the present application is shown in FIG. Figure 3 .

[0018] Figure 6 The temperature control curve provided in the embodiment of the present application is shown in FIG. Figure 4 .

[0019] Figure 7 The temperature control curve provided in the embodiment of the present application is shown in FIG. Figure 5 .

[0020] Figure 8 This is a schematic diagram of the structure of the temperature control system provided in an embodiment of the present application.

[0021] Figure 9 This is a schematic diagram of the structure of the temperature control system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0023] Regarding the mechanism of action of radio frequency in the field of beauty, the effects of radio frequency treatment are mostly based on collagen remodeling and accelerated local metabolism. Different temperatures bring different beauty care effects. The temperature of human tissue during treatment is closely related to the final effect.

[0024] Studies have shown that temperatures of 37-44°C can accelerate natural processes such as metabolism; at temperatures of 44-45°C, the conformation of proteins including collagen changes, and cells die; temperatures of 60-70°C can denature lower proteins, coagulate collagen and hemoglobin, and shrink collagen fibers; high temperatures of 90-100°C can cause the formation of extracellular vacuoles, leading to liquid evaporation; temperatures above 100°C can cause tissue carbonization.

[0025] Regarding the effectiveness of radiofrequency beauty treatments and the duration of radiofrequency exposure, the relationship between the effectiveness of beauty treatments and the duration of exposure cannot be ignored. Studies have found that temperatures of 70-90°C for a few milliseconds can cause tissue coagulation, while temperatures of 45°C for a few seconds can cause irreversible damage, and temperatures of 42°C for dozens of minutes can cause the death of most sensitive cells.

[0026] In order to avoid epidermal damage, the temperature of skin tissue during non-invasive radiofrequency should not exceed 40-43°C. By extending the treatment time and maintaining a safe temperature for a longer period of time, the best skin care effect can be achieved more easily and safely.

[0027] In related technologies, in radio frequency beauty devices, the temperature sensor is restricted by factors such as the installation position of the temperature sensor, the temperature conduction structure, the temperature sensor characteristics, the heat capacity of the heat-conducting medium, the thermal conductivity, etc. The temperature sensor cannot accurately and timely reflect the true temperature of the human epidermis. When radio frequency heating is performed based on inaccurate temperature data, it may cause burns to the skin tissue.

[0028] The present application provides a temperature control method based on load feedback, which can improve the accuracy of temperature control of a radio frequency beauty instrument. The temperature control method provided in an embodiment of the present disclosure is introduced in detail below.

[0029] Figure 1 The flow chart of the temperature control method provided in the embodiment of the present disclosure is shown in FIG. Figure 1 , a temperature control method based on load feedback provided in this application may include the following steps:

[0030] Step 101: Obtain a temperature control curve of the electrode of the radio frequency beauty instrument during a preset period of time. The temperature control curve is a curve showing a change in the target temperature of the electrode and the radio frequency time. Obtain the target temperature of the electrode in the i-th control cycle according to the temperature control curve.

[0031] See also Figure 2 The temperature control method provided in the embodiment of the present disclosure can be applied to radio frequency beauty devices. Radio frequency beauty devices transmit radio frequency energy to deep subcutaneous tissue through electrodes, generating an alternating electromagnetic field at a specific depth under the skin. The alternating electromagnetic field acts on the water molecules in the collagen. The water molecules generate heat during the vibration and rotation process, achieving a beauty care effect through the tissue thermal effect, causing the collagen fibers in the skin tissue to shrink.

[0032] The local temperature rise of the skin will produce pseudo-wounds in the skin tissue. The skin tissue can repair and regenerate the skin with local pseudo-wounds, and the resulting collagen hyperplasia can repair the collagen layer damaged by aging.

[0033] Below, the function of target temperature and RF time t is defined as f(t). The function curve of f(t) represents the temperature control curve of the RF beauty device's electrodes during a preset period. During the i-th control cycle, the cumulative heating time at the current moment is t0. The target temperature at the current moment is calculated based on the function f(t) as f(t0).

[0034] During the i-th control cycle, radiofrequency heating is applied to the skin tissue at a reference power of P0. The target electrode temperature at the current time t is calculated based on the temperature control curve. The function of the target temperature and the radiofrequency time t is f(t). During the i-th control cycle, the cumulative heating time at the current time t is t0. The target temperature at the current time t is calculated based on the temperature control curve f(t) as f(t0).

[0035] Step 102: Detecting the real-time temperature of the electrode in the i-th control period to obtain information on the difference between the target temperature and the real-time temperature; the i-th control period belongs to a period in the preset time period.

[0036] When the RF beauty device's electrodes are placed on the skin's surface, a temperature sensor detects the electrode's current temperature, using this temperature as feedback. Based on the electrode's current temperature and the temperature control curve, the heating start time or starting temperature is determined.

[0037] When a user uses a handheld beauty device for facial treatment, the end faces of the electrodes come into contact with the skin surface. When the electrodes touch the skin, the skin area acts as a load. The electrode pair formed by the positive and negative electrodes provides a high-frequency AC signal to the load, transmitting radiofrequency energy to the deep subcutaneous tissue. The high-frequency oscillation generates heat energy within the skin tissue. Heat is transferred from the skin tissue to the electrodes, and the current real-time temperature of the electrodes indirectly reflects the real-time temperature of the human epidermis.

[0038] Step 103: Adjust the operating parameters of the radio frequency beauty instrument in the (i+1)th control cycle according to the difference information.

[0039] In actual applications, the i-th control cycle and the i+1-th control cycle are two consecutive periods in the preset time period. The PID control method is used, and the difference between the target temperature and the real-time temperature of the electrode in the i-th control cycle is used as the input of the PID controller to calculate the RF power of the RF beauty instrument in the i+1-th control cycle. The PID controller uses the following algorithm formula:

[0040]

[0041] Wherein, Kp is the proportional gain, which is inversely proportional to the proportionality; Tt is the integral time constant; TD is the differential time constant; u(t) is the output signal of the PID controller, for example, the RF power of the RF beauty instrument in the i+1th control cycle; e(t) is the difference between the real-time temperature of the electrode and the target temperature.

[0042] A PID controller is a linear controller that creates a control deviation between a given value and the actual output value. The proportional (P), integral (I), and differential (D) components of the deviation are linearly combined to form the control variable, controlling the controlled object.

[0043] The load feedback-based temperature control method provided in this application uses the target electrode temperature as the control target and employs a PID control method. Based on the difference between the electrode's real-time temperature and the target temperature during the i-th control cycle, the operating parameters of the radiofrequency beauty device during the (i+1) control cycle are adjusted, causing the electrode temperature to dynamically change along a set temperature control curve. This improves the accuracy of the radiofrequency beauty device's temperature control.

[0044] Under the condition that the temperature sensor cannot accurately reflect the human skin temperature in a timely manner, the electrode temperature is controlled to change dynamically along the set temperature control curve. This can solve the problem of skin burns that may be caused during the heating process, and make the electrode's radio frequency time and target temperature accurately controllable.

[0045] In one embodiment, obtaining a temperature control curve of an electrode of a radio frequency beauty device during a preset period of time may include the following steps:

[0046] Step 201: Obtain preset parameter information, which includes a first threshold and a second threshold; the first threshold is the target temperature value at the first moment, and the second threshold is the target temperature value at the second moment; the time range of the preset period is from the first moment t1 to the second moment t2, and the first threshold is less than the second threshold.

[0047] See also Figure 3 The target temperature value at the first moment t1 is 25°C, and the target temperature value at the second moment t2 is 43°C. Preset parameter information is obtained, including the target temperature value of 25°C at the first moment t1 and the target temperature value of 43°C at the second moment t2. The time range of the preset period is recorded as [t1, t2], and the corresponding duration is 15 seconds, 20 seconds, or 30 seconds.

[0048] The temperature control method provided in this application can control the electrode temperature to rise from 25°C to 43°C according to the temperature control curve. Since the sensor temperature always follows the set temperature rise curve, the radio frequency time from the starting temperature to the ending temperature can be calculated according to the temperature rise curve, thereby improving the accuracy of the radio frequency time for skin tissue.

[0049] Step 202: numerically fitting the parameters in the preset parameter information using a second-order curve to obtain a temperature control curve of the electrode of the radio frequency beauty instrument in a preset time period.

[0050] See also Figure 3 The load feedback-based temperature control method provided in the disclosed embodiments uses a second-order curve fit to calculate the electrode temperature and RF time variations based on the temperature step response characteristics of the entire temperature measurement system. The temperature control curve, which falls within the safe temperature range of 25°C to 43°C, can serve as the temperature rise curve for human epidermis during RF heating. This temperature control curve exhibits a characteristic of initially increasing rapidly and then decreasing in temperature.

[0051] In practical applications, considering the step response characteristics of the temperature detection system, it is possible to obtain preset parameter information matching the temperature measurement system in different temperature measurement systems. A second-order curve is then used to numerically fit the parameters in the preset parameter information to obtain the temperature control curve of the RF beauty device's electrode during the preset time period. In this way, the fitting can be re-performed according to the step response characteristics of different temperature measurement systems.

[0052] In practical applications, the preset parameter information set by different users can be obtained and numerically fitted using a second-order curve to obtain the temperature control curve of the RF beauty device's electrodes during a preset period. This allows for re-fitting based on different users' perceptions, matching their sensitivity to temperature changes to achieve a better user experience.

[0053] In one embodiment, see Figure 3 The temperature range of the temperature control curve is from the first threshold value T1 to the second threshold value T2; the second threshold value T2 is greater than the first threshold value T1; adjusting the operating parameters of the radio frequency beauty instrument in the (i+1) control cycle according to the difference information may include the following steps:

[0054] Step 301: Determine the reference power P0 of the radio frequency beauty instrument; adopt a PID control method, use the difference information as the input of the PID controller, and calculate the compensation value ΔP of the reference power.

[0055] Step 302: Determine the radio frequency power P of the radio frequency beauty instrument in the i+1th control cycle according to the reference power P0 and the compensation value ΔP = P 0+ ΔP.

[0056] In practical applications, a PID control method is used. The difference between the target electrode temperature and the real-time temperature during the i-th control cycle is used as the input for the PID controller. The RF power of the RF beauty device during the i+1-th control cycle is calculated, ensuring that the electrode temperature detected by the sensor always follows the set temperature control curve. Without the PID control method, the same control effect can be achieved by maintaining the sensor temperature data according to the pre-set temperature control curve.

[0057] Step 303: See Figure 3 In the process of controlling the real-time temperature of the electrode to increase from the first threshold value T1 to the second threshold value T2, the radio frequency frequency of the radio frequency beauty instrument is controlled to decrease from the first frequency f1 to the second frequency f2.

[0058] See also Figure 3, the first threshold is T1, and the second threshold is T2; the first frequency f1 and the first threshold T1 are working parameters at the same time (t1); the second frequency f2 and the second threshold T2 are working parameters at the same time (t2).

[0059] The higher the RF signal's frequency, the weaker its penetration into the skin; the lower the RF signal's frequency, the stronger its penetration into the skin. In the disclosed embodiment, while controlling the electrode's real-time temperature to increase from a first threshold value T1 to a second threshold value T2, the RF frequency of the RF beauty device is controlled to decrease from a first frequency f1 to a second frequency f2. This allows the rate of temperature rise of the human epidermis to be gradually reduced as the electrode's real-time temperature increases from the first threshold value T1 to the second threshold value T2, improving the accuracy of temperature control.

[0060] In one embodiment, adjusting the operating parameters of the radio frequency beauty instrument in the (i+1) control cycle according to the difference information may include the following steps:

[0061] Step 401: When the difference information indicates that the real-time temperature value is greater than the target temperature value, the cooling power of the radio frequency beauty instrument in the (i+1)th control cycle is determined according to the difference information.

[0062] Step 402: In the (i+1)th control cycle, the semiconductor refrigeration chip is controlled according to the cooling power to cool the electrodes of the radio frequency beauty instrument.

[0063] The temperature control method provided in this application can dynamically track the real-time temperature of the electrode to the target temperature set on the temperature control curve. The electrode temperature is raised from 25°C to 43°C according to the temperature control curve. When the temperature reaches 43°C, RF energy output is stopped or the electrode is cooled. This maintains the epidermal temperature within the 43°C range. This ensures that the human epidermal temperature remains within a safe range, preventing burns.

[0064] In one embodiment, the temperature range of the temperature control curve is from a first threshold to a second threshold; the second threshold is greater than the first threshold; and adjusting the operating parameters of the radio frequency beauty instrument in the (i+1) control cycle according to the difference information may include the following steps:

[0065] Step 501: Determine in the i-th control period whether the real-time temperature of the electrode is greater than or equal to the second threshold.

[0066] Step 502: Controlling the semiconductor refrigeration chip to cool the electrode of the radio frequency beauty device according to a preset cooling power, so that the temperature of the electrode decreases from the second threshold to the first threshold. When the temperature of the electrode reaches the first threshold, the temperature of the electrode is controlled to increase from the first threshold to the second threshold within a preset time period according to the temperature control curve.

[0067] See also Figure 4 The target temperature value at the first moment is 25°C, and the target temperature value at the second moment is 43°C. In the i-th control cycle, the real-time temperature of the electrode is greater than or equal to 43°C. According to the preset cooling power, the semiconductor refrigeration chip is controlled to cool the electrode of the radio frequency beauty instrument, so that the temperature of the electrode drops to 25°C.

[0068] After the electrode temperature drops to 25°C, the temperature control method continues: a temperature control curve for the RF beauty device's electrode over a preset period is obtained, and a target temperature for the electrode in the i-th control cycle is determined based on the temperature control curve. During the i-th control cycle, the real-time temperature of the electrode is detected, and the difference between the target temperature and the real-time temperature is determined. Based on this difference, the operating parameters of the RF beauty device are adjusted for the i+1 control cycle.

[0069] In one embodiment, the temperature range of the temperature control curve is from a first threshold to a second threshold; the second threshold is greater than the first threshold; see Figure 5 The temperature control method provided in the embodiment of the present disclosure may further include the following steps:

[0070] Step 601: determining whether the real-time temperature of the electrode reaches a second threshold value in the i-th control cycle; and determining a first radio frequency power of the electrode according to the heat dissipation power of the electrode.

[0071] Step 602: In the (i+1)th control cycle, the real-time temperature of the electrode is controlled to be maintained at a first threshold value according to the first radio frequency power of the electrode.

[0072] See also Figure 5 , the first threshold is T1, the first RF power of the electrode is denoted as P1, and the heat dissipation power of the electrode is denoted as Ps, then P1-Ps=0. In the (i+1)th control cycle, the real-time temperature of the electrode is controlled to remain at the first threshold based on the first RF power of the electrode, and the temperature of the electrode is in a dynamic equilibrium state.

[0073] In one embodiment, the temperature range of the temperature control curve is from a first threshold to a second threshold; the second threshold is greater than the first threshold; see Figure 5 The temperature control method provided in the embodiment of the present disclosure may further include the following steps:

[0074] Step 701: Determine in the i-th control cycle whether the real-time temperature of the electrode reaches a second threshold; and determine a second radio frequency power according to the heat dissipation power of the electrode and a preset cooling power.

[0075] Step 702: In the (i+1)th control cycle, the real-time temperature of the electrode is controlled to be maintained at a first threshold value according to the second radio frequency power. The preset cooling power is used to control the semiconductor cooling plate to cool the electrode in the (i+1)th control cycle.

[0076] See also Figure 5 , the first threshold is T1, the second RF power is denoted as P2, the electrode heat dissipation power is denoted as Ps, and the preset cooling power is denoted as Pz, then P2-(Ps+Pz)=0. In the (i+1)th control cycle, the real-time temperature of the electrode is controlled to remain at the first threshold based on the second RF power, and the electrode temperature is in a dynamic equilibrium state.

[0077] In one embodiment, see Figure 6 、 7 The temperature control method provided in the embodiment of the present disclosure may further include the following steps:

[0078] Step 801: Determine whether the real-time temperature of the electrode reaches a second threshold value T2, and turn off the radio frequency power of the radio frequency beauty device.

[0079] Step 802: Determine that the real-time temperature of the electrode drops from the second threshold value T2 to the third threshold value T3, and control the real-time temperature of the electrode to increase from the third threshold value T3 to the second threshold value T2 according to the preset radio frequency power.

[0080] See also Figure 6 、 7 The first threshold is T1, the second threshold is T2, and the third threshold is T3, where the third threshold T3 is greater than the first threshold T1. Upon determining that the real-time temperature of the electrode has reached the second threshold T2, the RF power of the RF beauty device is turned off. The real-time temperature of the electrode will then drop from the first threshold T2 to the third threshold T3. When the real-time temperature of the electrode reaches the third threshold T3, the real-time temperature of the electrode is controlled to increase from the third threshold T3 to the second threshold T2 based on the preset RF power.

[0081] See also Figure 8 The temperature control system provided by the embodiments of the present disclosure includes: a radio frequency circuit, an electrode drive circuit, a cooling circuit, a temperature sensor, a semiconductor cooling chip, and a microcontroller unit. The temperature sensor is used to detect the real-time temperature of the electrode and transmit the real-time temperature of the electrode to the microprocessor unit, which is used to perform the following data processing:

[0082] Obtain a temperature control curve for the electrode of the radiofrequency beauty device during a preset time period, and obtain a target temperature for the electrode during the i-th control cycle based on the temperature control curve. Detect the real-time temperature of the electrode during the i-th control cycle, obtain the difference between the target temperature and the real-time temperature, and adjust the operating parameters of the radiofrequency beauty device during the i+1-th control cycle based on the difference.

[0083] See also Figure 9 The present application provides a temperature control system that can be applied to a radio frequency beauty instrument. The system includes the following unit modules:

[0084] An acquisition module is used to obtain a temperature control curve of the electrode of the radio frequency beauty instrument during a preset period of time. The temperature control curve is a curve showing a change in the target temperature of the electrode and the radio frequency time. The target temperature of the electrode in the i-th control period is obtained according to the temperature control curve.

[0085] A processing module is used to detect the real-time temperature of the electrode in the i-th control period and obtain the difference information between the target temperature and the real-time temperature; the i-th control period belongs to a period of the preset time period;

[0086] The control module is used to adjust the working parameters of the radio frequency beauty instrument in the (i+1)th control cycle according to the difference information.

[0087] The description of each embodiment above tends to emphasize the differences between the embodiments, and the same or similar parts can refer to each other. The methods disclosed in the various method embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments. The features disclosed in the various product embodiments provided in this application can be arbitrarily combined without conflict to obtain new product embodiments. The features disclosed in the various method or device embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments or device embodiments.

[0088] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of units is merely a logical function division. In actual implementation, there may be other division methods, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0089] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed on multiple grid units; some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0090] The functional units in the embodiments of the present application may all be integrated into one processing module, or each unit may be a separate unit, or two or more units may be integrated into one unit; the above-mentioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0091] Those skilled in the art will understand that all or part of the steps of implementing the above method embodiments may be accomplished through hardware associated with program instructions, and the aforementioned program may be stored in a computer-readable storage medium, which, when executed, executes the steps including the above method embodiments.

[0092] The above are only specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A temperature control method based on load feedback, characterized in that: The method is applied to a radio frequency beauty instrument, and includes: obtaining a temperature control curve of an electrode of the radio frequency beauty instrument during a preset time period, the temperature control curve being a curve of changes in the target temperature of the electrode and radio frequency time; obtaining a target temperature of the electrode in an i-th control period based on the temperature control curve; detecting the real-time temperature of the electrode in the i-th control period to obtain difference information between the target temperature and the real-time temperature; the i-th control period being one of the preset time periods; and adjusting operating parameters of the radio frequency beauty instrument in an i+1-th control period based on the difference information; the operating parameters including at least one of the following: radio frequency power and radio frequency frequency; the temperature range of the temperature control curve being from a first threshold to a second threshold, the second threshold being greater than the first threshold; The adjusting the operating parameters of the radio frequency beauty instrument in the (i+1) control cycle according to the difference information includes: using the difference information as an input of a PID controller to calculate the radio frequency power of the radio frequency beauty instrument in the (i+1) control cycle; controlling the radio frequency frequency of the radio frequency beauty instrument to decrease from a first frequency to a second frequency while controlling the real-time temperature of the electrode to increase from the first threshold to the second threshold; the first frequency and the first threshold being operating parameters at the same moment; and the second frequency and the second threshold being control parameters at the same moment; The adjusting the operating parameters of the radio frequency beauty instrument in the (i+1) control cycle according to the difference information includes: when the difference information indicates that the real-time temperature value is greater than the target temperature value, determining the cooling power of the radio frequency beauty instrument in the (i+1) control cycle according to the difference information; and in the (i+1) control cycle, controlling the semiconductor refrigeration plate to cool the electrodes of the radio frequency beauty instrument according to the cooling power.

2. The method according to claim 1, characterized in that The method of obtaining a temperature control curve of an electrode of a radio frequency beauty instrument during a preset time period includes: obtaining preset parameter information, the preset parameter information including a first threshold value and a second threshold value; the first threshold value is a target temperature value at a first moment, and the second threshold value is a target temperature value at a second moment; using a second-order curve to numerically fit the parameters in the preset parameter information to obtain a temperature control curve of the electrode of the radio frequency beauty instrument during the preset time period; wherein the time range of the preset time period is from the first moment to the second moment; and the first threshold value is less than the second threshold value.

3. The method according to claim 1, characterized in that The temperature range of the temperature control curve is from a first threshold to a second threshold; the second threshold is greater than the first threshold; adjusting the working parameters of the radio frequency beauty instrument in the i+1 control cycle according to the difference information includes: determining that the real-time temperature of the electrode is greater than or equal to the second threshold in the i-th control cycle; controlling the semiconductor refrigeration plate to cool the electrode of the radio frequency beauty instrument according to a preset cooling power, so that the temperature of the electrode drops from the second threshold to the first threshold.

4. The method according to claim 1, wherein The temperature range of the temperature control curve is from a first threshold to a second threshold; the second threshold is greater than the first threshold; the method also includes: determining that the real-time temperature of the electrode reaches the second threshold in the i-th control cycle; determining the first radio frequency power of the electrode based on the heat dissipation power of the electrode; in the i+1-th control cycle, controlling the real-time temperature of the electrode to be maintained at the first threshold based on the first radio frequency power of the electrode.

5. The method according to claim 1, wherein The temperature range of the temperature control curve is from a first threshold to a second threshold; the second threshold is greater than the first threshold; the method further includes: determining that the real-time temperature of the electrode reaches the second threshold in the i-th control cycle; determining the second radio frequency power according to the heat dissipation power of the electrode and the preset cooling power; in the i+1-th control cycle, controlling the real-time temperature of the electrode to be maintained at the first threshold according to the second radio frequency power; wherein the preset cooling power is used to control the semiconductor refrigeration plate to cool the electrode in the i+1-th control cycle.

6. The method according to claim 1, characterized in that The temperature range of the temperature control curve is from a first threshold to a second threshold; the second threshold is greater than the first threshold; the method also includes: determining that the real-time temperature of the electrode reaches the second threshold, turning off the radio frequency power of the radio frequency beauty instrument; determining that the real-time temperature of the electrode drops from the second threshold to a third threshold, and controlling the real-time temperature of the electrode to increase from the third threshold to the second threshold according to the preset radio frequency power; the third threshold is greater than the first threshold.

7. A temperature control system based on load feedback, characterized in that: The system is applied to a radio frequency beauty instrument, and includes: an acquisition module, configured to acquire a temperature control curve of an electrode of the radio frequency beauty instrument during a preset time period, wherein the temperature control curve is a curve showing changes in the target temperature of the electrode and radio frequency time; and to acquire a target temperature of the electrode during an i-th control period based on the temperature control curve; a processing module, configured to detect the real-time temperature of the electrode during the i-th control period and acquire difference information between the target temperature and the real-time temperature; the i-th control period being one of the preset time periods; and a control module, configured to adjust operating parameters of the radio frequency beauty instrument during the (i+1)th control period based on the difference information; the operating parameters including at least one of the following: radio frequency power and radio frequency frequency; The temperature control curve has a temperature range from a first threshold to a second threshold; the second threshold is greater than the first threshold; and adjusting the operating parameters of the radio frequency beauty instrument in the (i+1) control cycle according to the difference information includes: using the difference information as an input to a PID controller to calculate the radio frequency power of the radio frequency beauty instrument in the (i+1) control cycle; while controlling the real-time temperature of the electrode to increase from the first threshold to the second threshold, controlling the radio frequency frequency of the radio frequency beauty instrument to decrease from a first frequency to a second frequency; the first frequency and the first threshold are operating parameters at the same time; and the second frequency and the second threshold are control parameters at the same time. The adjusting the operating parameters of the radio frequency beauty instrument in the (i+1) control cycle according to the difference information includes: when the difference information indicates that the real-time temperature value is greater than the target temperature value, determining the cooling power of the radio frequency beauty instrument in the (i+1) control cycle according to the difference information; and in the (i+1) control cycle, controlling the semiconductor refrigeration plate to cool the electrodes of the radio frequency beauty instrument according to the cooling power.

8. A radio frequency beauty instrument, characterized in that: The radio frequency beauty instrument includes: a memory and a processor; the memory is used to store computer instructions; and the processor is used to execute the temperature control method described in any one of claims 1 to 6.

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