Beauty instrument and its temperature control circuit

Abstract

This application relates to the field of beauty instruments, and discloses a beauty instrument and its temperature control circuit. The circuit includes a refrigeration drive circuit coupled to a refrigeration element, and the refrigeration element is used to cool the skin treatment part of the beauty instrument; a controller coupled to the refrigeration drive circuit to control the refrigeration power of the refrigeration drive circuit; a temperature sensor coupled to the controller for detecting the ambient temperature. Wherein, after the temperature sensor detects that the ambient temperature is greater than a first preset temperature, the controller issues a first control signal to increase the standby refrigeration power of the refrigeration drive circuit, and / or after the temperature sensor detects that the ambient temperature is less than a second preset temperature, the controller issues a second control signal to decrease the standby refrigeration power of the refrigeration drive circuit, and the first preset temperature is greater than or equal to the second preset temperature. By the above method, this application can add the function of adjusting the refrigeration power of the beauty instrument based on the ambient temperature, and thus effectively control the temperature generated by the beauty instrument.

Description

Technical Field

[0001] The present application relates to the field of beauty instruments, and particularly to a beauty instrument and its temperature control circuit. Background Art

[0002] With the improvement of living standards, people's requirements for the quality of life are also getting higher and higher, and science and technology are more and more applied in all aspects of life. In particular, people are paying more and more attention to the beauty and quality of the skin. For the beauty and quality of the skin, beauty instruments have emerged as the times require.

[0003] A beauty instrument generally includes a skin treatment part and a refrigerating element for cooling the skin treatment part. When the beauty instrument is in standby and starts to work and contacts the human skin, the temperature of the skin treatment part may not meet the human body feeling. Summary of the Invention

[0004] The main technical problem to be solved by the present application is to provide a beauty instrument and its temperature control circuit, which can increase the function of adjusting the refrigeration power of the beauty instrument based on the ambient temperature, and thus effectively control the temperature generated by the beauty instrument.

[0005] To solve the above technical problem, a technical solution adopted by the present application is: to provide a temperature control circuit for a beauty instrument, the temperature control circuit for the beauty instrument includes a refrigeration drive circuit, coupled to a refrigerating element, the refrigerating element is used to cool the skin treatment part of the beauty instrument; a controller, having a first terminal and a second terminal, the first terminal is used to be coupled to the refrigeration drive circuit to control the magnitude of the refrigeration power of the refrigeration drive circuit; a temperature sensor, coupled to the second terminal, is used to detect the ambient temperature; wherein, after the temperature sensor detects that the ambient temperature is greater than a first preset temperature, the controller issues a first control signal to increase the standby refrigeration power of the refrigeration drive circuit, and after the temperature sensor detects that the ambient temperature is less than a second preset temperature, the controller issues a second control signal to decrease the standby refrigeration power of the refrigeration drive circuit, and the first preset temperature is greater than or equal to the second preset temperature.

[0006] To solve the above technical problem, another technical solution adopted by the present application is: to provide a beauty instrument, the beauty instrument includes a refrigerating element and any one of the above temperature control circuits for a beauty instrument.

[0007] The temperature control circuit for the beauty instrument of the present application detects the ambient temperature through a temperature sensor, adjusts the standby refrigeration power of the refrigeration drive circuit according to the detected ambient temperature, increases the standby refrigeration power of the refrigeration drive circuit when the ambient temperature is relatively high so that the temperature of the skin treatment part of the beauty instrument is lower and the body feeling is comfortable, and / or decreases the standby refrigeration power of the refrigeration drive circuit when the ambient temperature is relatively low so that the temperature of the skin treatment part of the beauty instrument is not too low and the body feeling is comfortable. Description of the Drawings

[0008] Figure 1 It is a schematic circuit diagram of an embodiment of the temperature control circuit of the beauty instrument of the present application;

[0009] Figure 2 It is a schematic circuit diagram of the temperature sensor circuit of an embodiment of the temperature control circuit of the beauty instrument of the present application;

[0010] Figure 3 It is a schematic circuit diagram of the current detection circuit of an embodiment of the temperature control circuit of the beauty instrument of the present application;

[0011] Figure 4 It is a schematic circuit diagram of the motion sensor circuit of an embodiment of the temperature control circuit of the beauty instrument of the present application;

[0012] Figure 5 It is a schematic flow chart of an embodiment of the temperature control circuit of the beauty instrument of the present application. Detailed implementation manners

[0013] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application in conjunction with the accompanying drawings. It can be understood that the specific embodiments described herein are only used to explain the present application, rather than limiting the present application. Additionally, it should be noted that for the sake of convenience of description, only the parts related to the present application are shown in the drawings, rather than all the structures. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0014] The terms "first", "second", etc. in the present application are used to distinguish different objects, rather than to describe a specific order.

[0015] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products, or devices.

[0016] Referring to "embodiment" in this context means that a specific feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0017] The term "coupled" in this application can be a direct connection or an indirect connection through a third-party component.

[0018] When the beauty instrument works, heat energy will be generated. To avoid the heat energy generated by the beauty instrument during use causing a relatively high temperature at the skin treatment part of the beauty instrument, which may lead to scalding of the biological part, a refrigeration element for cooling the skin treatment part is provided in the beauty instrument to cool the beauty instrument, so as to achieve the effect that the beauty instrument will not scald the biological part during operation.

[0019] As Figure 1 shown, the temperature control circuit may include a controller 10, a refrigeration drive circuit 1, and a temperature sensor 2. Among them, the refrigeration drive circuit 1 is a circuit that drives the beauty instrument to perform refrigeration work, and is coupled to the refrigeration element. When the refrigeration drive circuit 1 works, it controls the refrigeration element to function so as to absorb heat from the outside through the refrigeration element to achieve the purpose of cooling the skin treatment part of the beauty instrument. The controller 10 can control the operation of some circuits or components in the beauty instrument. The controller 10 can be provided with terminals to couple to some circuits or components so that the controller 10 can control the operation effect of the circuits or components through the terminals. The temperature sensor 2 is an element that detects the ambient temperature and is coupled to the controller 10. The temperature sensor 2 can transmit the corresponding ambient temperature information to the controller 10 after detecting the ambient temperature, and transmit different information corresponding to different detected ambient temperatures to the controller 10.

[0020] Optionally, the terminals provided on the controller 10 may include a first terminal 11 and a second terminal 12. The first terminal 11 is used to couple to the refrigeration drive circuit 1, and the controller 10 transmits a control signal to the refrigeration drive circuit 1 through the first terminal 11 to control the standby refrigeration power of the refrigeration drive circuit 1. The second terminal 12 is used to couple to the temperature sensor 2, and the controller 10 receives the ambient temperature signal transmitted by the temperature sensor 2 through the second terminal 12, and transmits a corresponding control signal to the refrigeration drive circuit 1 according to the received ambient temperature signal.

[0021] After the beauty instrument is powered on, the temperature sensor 2 will detect the ambient temperature. A specific ambient temperature can be set so that when the detected ambient temperature is greater than / less than this specific ambient temperature, the refrigeration effect of the beauty instrument is enhanced / weakened. For different ambient temperature signals received by the controller 10, the controller 10 will send different control signals to the refrigeration drive circuit 1 to adjust the standby refrigeration power of the refrigeration drive circuit 1.

[0022] Optionally, after the temperature sensor 2 detects that the ambient temperature is greater than the first preset temperature, the controller 10 issues a first control signal to increase the standby refrigeration power of the refrigeration drive circuit 1.

[0023] Optionally, after the temperature sensor 2 detects that the ambient temperature is less than the second preset temperature, the controller 10 issues a second control signal to reduce the standby cooling power of the refrigeration drive circuit 1. The first preset temperature is greater than or equal to the second preset temperature.

[0024] For example, the first preset temperature and the second preset temperature can be set to 18 °C. When the ambient temperature is 34 °C, the standby cooling power of the refrigeration drive circuit 1 will increase; when the ambient temperature is 10 °C, the standby cooling power of the refrigeration drive circuit 1 will decrease.

[0025] For example, the first preset temperature can be set to 34 °C, and the second preset temperature can be set to 18 °C. When the ambient temperature is 36 °C, the standby cooling power of the refrigeration drive circuit 1 will increase; when the ambient temperature is 15 degrees Celsius, the standby cooling power of the refrigeration drive circuit 1 will decrease.

[0026] After the beauty device is powered on, the temperature sensor 2 sends the corresponding ambient temperature signal to the controller 10 after detecting the ambient temperature. The controller 10 issues a control signal to the refrigeration drive circuit 1, so that the refrigeration drive circuit 1 can adjust the standby cooling power according to the ambient temperature. Furthermore, the refrigeration effect of the beauty device during standby changes with the ambient temperature, with the refrigeration effect enhancing at higher ambient temperatures and weakening at lower ambient temperatures. In this way, the refrigeration effect of the beauty device in the standby state is related to the ambient temperature. Regardless of the ambient temperature, the beauty device will not make the biological part feel too cold or too hot when it comes into contact with the biological part, and will not stimulate the biological part.

[0027] As Figure 1 shown, the beauty device temperature control circuit includes a pulse generation circuit 3 and a current detection circuit 4. Among them, the pulse generation circuit 3 is a circuit that generates pulses, coupled to the controller 10, and the pulses generated by the pulse generation circuit 3 act on the skin treatment part. The current detection circuit 4 is an element that detects the current flowing in the circuit, coupled to the controller 10, and the current detection circuit 4 detects the current of the pulse generation circuit 3.

[0028] Optionally, the terminals set on the controller 10 may include a third terminal 13 and a fourth terminal 14. The pulse generation circuit 3 is coupled to the third terminal 13 of the controller 10. The controller 10 transmits a control signal to the pulse generation circuit 3 through the third terminal 13, so that the pulse generation circuit 3 can adjust the magnitude of the working current generated according to the received control signal. The current detection circuit 4 is coupled to the fourth terminal 14 of the controller 10. After detecting the magnitude of the current in the circuit, the current detection circuit 4 transmits a signal to the controller 10 through the fourth terminal 14, and the controller 10 adjusts the working current generated by the pulse generation circuit 3 according to the received signal.

[0029] Specifically, after the current detection circuit 4 detects that the output current of the pulse generation circuit 3 reaches the operating current, it sends a signal to the controller 10. After the controller 10 obtains that the output current of the current pulse generation circuit 3 has reached the operating current, it controls the pulse generation circuit 3 to operate to reduce the output power so that the skin treatment part of the beauty device is below the third preset temperature. The operating current corresponds to the output current of the pulse generation circuit 3 after the skin treatment part contacts the skin. Since the instantaneous current in the circuit of the beauty device is very small and the power is very small when the beauty device does not contact the skin; after contacting the skin, the skin acts as a load, the instantaneous current will become larger and the power will rise. The current difference in the circuit before and after the beauty device contacts the skin is relatively large. That is to say, before the controller 10 outputs the pulse energy, it is possible to judge whether the beauty device contacts the skin by whether the output current of the pulse generation circuit 3 has reached the operating current. When the beauty device does not contact the skin, the pulse generation circuit 3 will output a waveform with a low duty cycle to monitor whether the beauty device contacts the skin.

[0030] During the use of the beauty device, the controller 10 will also adjust the output pulse energy according to the temperature of the skin treatment part to limit the highest temperature of the skin treatment part. The third preset temperature is used to limit the highest temperature of the skin treatment part of the beauty device to avoid the temperature of the skin treatment part being too high and thus scalding the biological part. The third preset temperature is greater than the first preset temperature. For example, the third preset temperature can be set to 42 °C, and the beauty device needs to control the temperature of the skin treatment part not to exceed 42 °C during use.

[0031] There is a certain relationship between the operating current generated by the pulse generation circuit 3 and the temperature of the skin treatment part. When the operating current is too large, the temperature of the skin treatment part of the beauty device will correspondingly increase, so that the temperature felt by the skin in contact with the beauty device by the human body will also be relatively high, and further the risk of scalding the human body will increase. Therefore, it is necessary to strictly control the temperature of the skin treatment part. The temperature of the current skin treatment part can be reflected by the operating current of the pulse generation circuit 3. The current detection circuit 4 detects the operating current of the pulse generation circuit 3, which can realize the monitoring of the output power of the beauty device, and avoid the situation that the operating current of the pulse generation circuit 3 is too large, resulting in the temperature of the skin treatment part being too high and the temperature felt by the biological part in contact with the skin treatment part being too high, thus avoiding the occurrence of scalding.

[0032] Optionally, the temperature sensor 2 is arranged on the circuit board where the controller 10 is located. To protect the controller 10, a current limiting resistor is used to adjust the current flowing through the controller 10. Arranging the temperature sensor 2 on the circuit board where the controller 10 is located can reduce the use of the current limiting resistor.

[0033] Optionally, the temperature sensor 2 can also affect the working current generated by the pulse generating circuit 3, and the controller 10 controls the maximum working current generated by the pulse generating circuit 3 according to the ambient temperature detected by the temperature sensor 2. Specifically, the controller 10 is specifically configured to adjust a third preset temperature according to the ambient temperature detected by the temperature sensor 2, and the third preset temperature is inversely proportional to the level of the ambient temperature.

[0034] By adjusting the third preset temperature based on the detected ambient temperature, the temperature of the skin treatment part during the operation of the beauty device can change with the change of the ambient temperature, so that the temperature felt by the biological part in contact with the skin treatment part is appropriate, not too hot at a higher ambient temperature and not too cold at a lower ambient temperature, improving the user's good experience when using the beauty device.

[0035] Optionally, the temperature sensor 2 is also disposed at the skin treatment part of the beauty device for detecting the temperature of the skin treatment part of the beauty device.

[0036] The temperature sensor 2 is configured to send a signal to the controller 10 when the detected temperature of the skin treatment part reaches the third preset temperature. After receiving the signal, the controller 10 issues a control signal to the pulse generating circuit 3 through a terminal to reduce the output current of the pulse generating circuit 3, so that the temperature of the skin treatment part of the beauty device approaches but does not exceed the third preset temperature.

[0037] By detecting the temperature of the skin treatment part through the temperature sensor 2, the controller 10 can obtain the temperature of the skin treatment part, and thus can issue a control signal to perform corresponding adjustment on the pulse generating circuit 3 according to the temperature of the skin treatment part, so that the temperature of the skin treatment part is maintained below a specified temperature, so that the temperature felt by the biological part in contact with the skin treatment part is not very high, avoiding the occurrence of the biological part being scalded.

[0038] Refer to Figure 2 , the temperature sensor 2 includes a negative temperature coefficient thermistor 21, a voltage dividing resistor, a filtering capacitor, and a current limiting resistor. The negative temperature coefficient thermistor 21 is used to reflect the temperature of the skin treatment part.

[0039] Specifically, the temperature sensor 2 includes a first voltage dividing resistor 221, a third filtering capacitor 23, and a second current limiting resistor 222. Among them, one end of the first voltage dividing resistor 221 is coupled to the second voltage source 24, and the other end is coupled to one end of the negative temperature coefficient thermistor 21. One end of the third filtering capacitor 23 is coupled to one end of the negative temperature coefficient thermistor 21, and the other end is grounded. One end of the second current limiting resistor 222 is coupled to one end of the negative temperature coefficient thermistor 21, and the other end is coupled to the second terminal 12 of the controller 10.

[0040] The temperature sensor 2 is coupled to a voltage source. The signal input from the voltage source flows through the first voltage-dividing resistor 221, the negative temperature coefficient thermistor 21, the third filter capacitor 23, and the second current-limiting resistor 222 and then outputs a stable signal to the controller 10, so that the controller 10 can detect the obtained voltage signal and further obtain the temperature of the skin treatment site. The negative temperature coefficient thermistor 21 detects the temperature of the skin treatment site. Since the resistance value of the negative temperature coefficient thermistor 21 changes with the temperature, different temperatures result in different voltages input to the controller 10. To ensure the stability of the voltage input to the controller 10, the third filter capacitor 23 and the second current-limiting resistor 222 are provided to filter the voltage signal processed by the negative temperature coefficient thermistor 21 and remove unnecessary AC components.

[0041] By setting the negative temperature coefficient thermistor 21, the first voltage-dividing resistor 221, the third filter capacitor 23, and the second current-limiting resistor 222, the signal output from the temperature sensor 2 to the controller 10 is made stable. As a result, the temperature of the skin treatment site judged by the controller 10 based on the detected voltage is more accurate. Thus, the controller 10 can obtain the accurate current temperature of the skin treatment site and reduce the risk of scalding the biological site.

[0042] As Figure 3 shown, the current detection circuit 4 includes a detection resistor 411 and a current detection chip 42. The current detection circuit 4 obtains the magnitude of the output current of the pulse generation circuit 3 through the detection resistor 411. The current detection chip 42 is coupled to the detection resistor 411 and the controller 10. By detecting the voltage generated on the detection resistor 411 and sending a corresponding current signal to the controller 10, the controller 10 can receive the current signal transmitted by the current detection circuit 4.

[0043] The magnitude of the current flowing through the detection resistor 411 reflects the magnitude of the output current of the pulse generation circuit 3. To obtain the voltage generated across the detection resistor 411, the current detection chip 42 has terminals coupled to the detection resistor 411. The current detection chip 42 has a first detection terminal 421. The first detection terminal 421 is coupled to the detection resistor 411 to obtain the magnitude of the current flowing through the detection resistor 411 and thereby obtain the voltage generated across the detection resistor 411. Specifically, the number of the first detection terminals 421 is two, which are respectively coupled to both ends of the detection resistor 411. To enable the controller 10 to obtain the voltage generated across the detection resistor 411, the current detection chip 42 has a detection output terminal 422. The detection output terminal 422 is coupled to the fourth terminal 14 of the controller 10. The current detection chip 42 outputs the detected voltage generated across the detection resistor 411 to the fourth terminal 14 of the controller 10 through the detection output terminal 422, so that the controller 10 can obtain the magnitude of the output current of the pulse generation circuit 3, thereby enabling the controller 10 to adjust the magnitude of the operating current of the pulse generation circuit 3 according to the obtained magnitude of the output current. More specifically, since the voltage flowing through the detection resistor 411 generates a voltage drop across the detection resistor 411, after the current detection chip 42 detects the voltage generated across the detection resistor 411, the detected voltage needs to be internally processed and amplified and then output from the detection output terminal 422 to the controller 10.

[0044] By providing the detection resistor 411 and the current detection chip 42, the controller 10 can obtain the output current generated by the pulse generation circuit 3 based on the current signal output by the current detection chip 42, can monitor the output power generated by the pulse generation circuit 3, and further monitor the temperature of the skin treatment site, thereby reducing the risk of scalding the biological site of the skin treatment site.

[0045] Optionally, the current detection circuit 4 further includes filter capacitors. The filter capacitors stabilize the voltage within the current detection circuit 4. Specifically, the current detection circuit 4 may have two first filter capacitors 431 and two second filter capacitors 432. One end of each first filter capacitor 431 is grounded, and the other end is respectively coupled to the first voltage source 44 and both ends of the detection resistor 411. One end of each second filter capacitor 432 is grounded.

[0046] In order to avoid the impact on the circuits within the current detection circuit 4 caused by unstable voltage, it is necessary to set a filter capacitor in the circuit through which the voltage source that inputs a signal to the current detection circuit 4 flows, so as to ensure that the voltage signal input into the current detection circuit 4 is stable. Both ends of the detection resistor 411 are coupled to the voltage source. Therefore, it is necessary to set a first filter capacitor 431 near the voltage source to which the detection resistor 411 is coupled to ensure the stability of the voltage generated on the detection resistor 411 and the current detection chip 42. The voltage output from the detection output terminal 422 of the current detection chip 42 to the controller 10 may also have an unstable voltage situation. Therefore, it is necessary to set a second filter capacitor 432 near the detection output terminal 422 to filter out most of the AC components and ensure the stability of the voltage output to the controller 10.

[0047] Optionally, the current detection circuit 4 further includes a current limiting resistor, and the current limiting resistor processes the current signal output from the detection output terminal 422 of the current detection chip 42. Specifically, in order for the signal output from the detection output terminal 422 of the current detection chip 42 to be output to the controller 10 more stably, the current detection circuit 4 includes a first current limiting resistor 412. One end of the first current limiting resistor 412 is coupled to one end of a second filter capacitor 432 and the detection output terminal 422, and the other end is coupled to the other end of another second filter capacitor 432 and the fourth terminal 14 of the controller 10. The first current limiting resistor 412 and the second filter capacitor 432 form a Π-type filter circuit to filter out the AC components in the current signal output from the detection output terminal 422, making the voltage output to the controller 10 more stable.

[0048] Optionally, the beauty instrument temperature control circuit further includes a motion sensor 6. The motion sensor 6 is coupled to the controller 10 and is used to detect the vibration condition of the beauty instrument.

[0049] Specifically, the terminals set on the controller 10 may include a sixth terminal 16, and the motion sensor 6 is coupled to the sixth terminal 16 of the controller 10. The controller 10 controls the pulse generating circuit to start working in response to the power-on signal and when the motion signal detected by the motion sensor 6 meets the preset motion signal conditions. The output current of the pulse generating circuit 3 is proportional to the corresponding motion intensity of the motion signal.

[0050] Optionally, the power-on signal may refer to a signal indicating that the beauty instrument can start working. The beauty instrument can determine the power-on state of the beauty instrument by setting a switch button. Before the switch button is pressed, even if the beauty instrument is powered on and moved, the beauty instrument is not in the power-on state. The beauty instrument can work only in the power-on state.

[0051] Optionally, the power-on button may be a selection switch for the beauty instrument mode. For example, select the gentle mode or the strong mode through the switch button, and select the eye mode or the non-eye mode through the switch button.

[0052] After the beauty instrument is powered on and the power-on button is pressed, if it is not used, radio frequency energy can be not output, reducing power consumption. Therefore, an action sensor 6 can be set to detect whether the beauty instrument is moving, so as to judge whether the beauty instrument is in use. When the action sensor 6 detects that the beauty instrument is being used, it can send an action signal to the sixth terminal 16 of the controller 10. When the controller 10 obtains the action signal and determines that the beauty instrument is in the power-on state at this time, it will send a control signal to the pulse generating circuit 3 to make the pulse generating circuit 3 work to output pulse energy. Moreover, the output current of the pulse generating circuit 3 is proportional to the corresponding action intensity of the action signal.

[0053] Through the action signal transmitted by the action sensor 6, the controller 10 can obtain the current usage state of the beauty instrument and then judge how to adjust the output power of the beauty instrument. The output power of the beauty instrument changes with the change of the action state of the beauty instrument. The user can control the output power of the beauty instrument by controlling the action state of the beauty instrument (such as moving speed, rotation speed, etc.), and then control the intensity of the beauty instrument on the biological part, improving the user experience when using the beauty instrument.

[0054] Refer to Figure 4 , the action sensor 6 includes a six-axis sensor 61. Among them, the six-axis sensor 61 is coupled to the controller 10 and can detect the action degree of the product (such as vibration degree, moving degree, rotation degree).

[0055] Specifically, the controller 10 has a seventh terminal 17. The six-axis sensor 61 includes an interrupt terminal 621 and a signal output terminal 622. Among them, the signal output terminal 622 is coupled to the sixth terminal 16, and the interrupt terminal 621 is coupled to the seventh terminal 17. When the six-axis sensor 61 detects that the beauty instrument is moving, it will send an action signal to the controller 10 through the interrupt terminal 621 and the signal output terminal 622, informing the controller 10 that the beauty instrument is moving. After receiving the action signal, when the controller 10 determines that the beauty instrument is powered on, it sends a signal to the pulse generating circuit 3 to make the pulse generating circuit 3 work.

[0056] Optionally, the controller 10 can adjust the working current of the pulse generating circuit 3 through the action signal sent by the action sensor 6. When it is detected that the action degree of the beauty instrument reaches a specific value, an interrupt signal is sent to the controller 10 through the interrupt terminal 621 to inform the controller 10. The controller 10 can know that the output power of the beauty instrument may be abnormal at this time based on the interrupt signal transmitted from the interrupt terminal 621. After the six-axis sensor 61 sends an interrupt signal to the controller 10 through the interrupt terminal 621, it transmits the action signal of the beauty instrument to the controller 10 through the signal output terminal 622, so that the controller 10 can adjust the working current of the pulse generating circuit 3 through the incoming action signal.

[0057] Optionally, the motion sensor 6 includes a pull-up resistor 63. One end of the pull-up resistor 63 is coupled to the third voltage source 64, and the other end is coupled to the signal output terminal 622. The pull-up resistor 63 is coupled to the signal output terminal 622 to clamp the uncertain signal at a high level.

[0058] The motion sensor 6 sends an action signal to the controller 10, so that the controller 10 can determine whether the pulse generating circuit 3 can work, and can judge the output power of the pulse generating circuit 3 by the strength of the transmitted action signal. In this way, when the beauty instrument does not move, no power will be output to cause energy waste. And the output power of the beauty instrument can be adjusted according to the strength of the action signal, which improves the user's experience of using the beauty instrument.

[0059] See also Figure 5 , Figure 5 It is a flow chart of an embodiment of the temperature control circuit of the present application. After the beauty instrument is powered on, the temperature sensor detects whether the ambient temperature is greater than the first preset temperature and / or less than the second preset temperature. If it is greater than the first preset temperature, the user is in an environment with a higher room temperature, and the controller should send a signal to increase the standby refrigeration power of the refrigeration drive circuit; and / or if it is less than the second preset temperature, the user is in an environment with a lower room temperature, and the controller should send a signal to reduce the standby refrigeration power of the refrigeration drive circuit. In this way, the temperature of the skin treatment part of the beauty instrument can be adjusted according to the ambient temperature to make the body feel comfortable.

[0060] After adjusting the standby cooling power of the beauty instrument, if the controller receives a power-on signal and an action signal from the action sensor, it sends a signal to make the pulse generating circuit work. During the use of the beauty instrument, the temperature sensor monitors the temperature of the skin treatment part. If the temperature of the skin treatment part is greater than the third preset temperature, the temperature sensor sends a signal to the controller, and after receiving the signal, the controller reduces the output current of the pulse driving circuit so that the temperature of the skin treatment part will not burn the biological part.

[0061] The above are only embodiments of the present application, and do not thereby limit the patent scope of the present application. Any equivalent structural or equivalent process transformations made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, are similarly included within the patent protection scope of the present application.

Claims

1. A temperature control circuit for a beauty device, characterized in that, it includes: A refrigeration drive circuit, coupled to a refrigeration element, and the refrigeration element is used to cool the skin treatment part of the beauty device; A controller, having a first terminal and a second terminal, and the first terminal is used to be coupled to the refrigeration drive circuit to control the magnitude of the refrigeration power of the refrigeration drive circuit; A temperature sensor, coupled to the second terminal, for detecting the ambient temperature; Wherein, after the temperature sensor detects that the ambient temperature is greater than a first preset temperature, the controller issues a first control signal to increase the standby refrigeration power of the refrigeration drive circuit, and / or after the temperature sensor detects that the ambient temperature is less than a second preset temperature, the controller issues a second control signal to decrease the standby refrigeration power of the refrigeration drive circuit, and the first preset temperature is greater than or equal to the second preset temperature; thus, the refrigeration effect of the beauty device in the standby state is related to the ambient temperature. Regardless of the ambient temperature, when the beauty device contacts a biological part, it will not make the biological part feel too cold or too hot and will not stimulate the biological part.

2. The temperature control circuit for a beauty device according to claim 1, characterized in that, the temperature sensor includes: A negative temperature coefficient thermistor; A first voltage-dividing resistor, one end is coupled to a second voltage source, and the other end is coupled to one end of the negative temperature coefficient thermistor, and the other end of the negative temperature coefficient thermistor is grounded; A third filter capacitor, one end is coupled to the one end of the negative temperature coefficient thermistor, and the other end of the third filter capacitor is grounded; A second current-limiting resistor, one end is coupled to the one end of the negative temperature coefficient thermistor, and the other end of the second current-limiting resistor is coupled to the second terminal.

3. The temperature control circuit for a beauty device according to claim 1, characterized in that, the controller has a third terminal and a fourth terminal, and the temperature control circuit for the beauty device includes: A pulse generating circuit, coupled to the third terminal, for emitting pulses to the skin treatment part of the beauty device to act on the skin; A current detection circuit, coupled to the fourth terminal, for detecting the output current of the pulse generating circuit; Wherein, after the current detection circuit detects that the output current of the pulse generating circuit reaches the working current, the controller controls the pulse generating circuit to work so that the skin treatment part of the beauty device is below a third preset temperature, and the working current corresponds to the output current of the pulse generating circuit after the skin treatment part contacts the skin; the standby temperature is lower than the working temperature, only controlled below, not stopped working, and the third preset temperature is greater than the first preset temperature.

4. The temperature control circuit for a beauty device according to claim 3, characterized in that, the controller is specifically used to adjust the third preset temperature according to the ambient temperature detected by the temperature sensor, and the third preset temperature is inversely proportional to the level of the ambient temperature.

5. The temperature control circuit for a beauty device according to claim 3, characterized in that, the current detection circuit includes: A detection resistor, wherein the magnitude of the current flowing through the detection resistor reflects the magnitude of the output current of the pulse generation circuit; A current detection chip having a first detection terminal and a detection output terminal, wherein the first detection terminal is coupled to the detection resistor, and the detection output terminal is coupled to the fourth terminal.

6. The beauty instrument temperature control circuit according to claim 5, characterized in that the current detection circuit includes: Two first filter capacitors, one end of each first filter capacitor is grounded, and the other ends of the two first filter capacitors are respectively coupled to a first voltage source and both ends of the detection resistor; wherein the number of the first detection terminals is two and is used for being respectively coupled to both ends of the detection resistor.

7. The beauty instrument temperature control circuit according to claim 5, characterized in that the current detection circuit includes: Two second filter capacitors, one end of each second filter capacitor is grounded; A first current limiting resistor, one end of which is coupled to the other end of one of the second filter capacitors and the detection output terminal, and the other end of the first current limiting resistor is coupled to the other end of the other second filter capacitor and the fourth terminal.

8. The beauty instrument temperature control circuit according to claim 1, characterized in that the controller has a third terminal, and the beauty instrument temperature control circuit includes a pulse generation circuit, and the pulse generation circuit is coupled to the third terminal and is used for sending out pulses to a skin treatment part of the beauty instrument to act on the skin; The temperature sensor is further arranged at the skin treatment part of the beauty instrument and is used for detecting the temperature of the skin treatment part of the beauty instrument. When the temperature sensor detects a third preset temperature, the output current of the pulse generation circuit is reduced, so that the skin treatment part of the beauty instrument approaches but does not exceed the third preset temperature.

9. The beauty instrument temperature control circuit according to claim 1, characterized in that the controller has a third terminal, and the beauty instrument temperature control circuit includes a pulse generation circuit, and the pulse generation circuit is coupled to the third terminal and is used for sending out pulses to a skin treatment part of the beauty instrument to act on the skin; The beauty instrument temperature control circuit includes: An action sensor; wherein the controller has a sixth terminal, which is coupled to the action sensor. When the controller responds to a power-on signal and the action signal detected by the action sensor meets a preset action signal condition, the controller controls the pulse generation circuit to start working, and the output current of the pulse generation circuit is proportional to the corresponding action intensity of the action signal.

10. The beauty instrument temperature control circuit according to claim 9, characterized in that the action sensor includes: A six-axis sensor having an interrupt terminal and a signal output terminal; wherein the signal output terminal is coupled to the sixth terminal, and the controller has a seventh terminal, and the seventh terminal is coupled to the interrupt terminal.

11. The beauty instrument temperature control circuit according to claim 10, characterized in that the action sensor includes: A pull-up resistor, one end of which is coupled to a third voltage source and the other end of which is coupled to the signal output terminal.

12. A beauty instrument, characterized in that it includes: A refrigeration element; and a temperature control circuit of a beauty instrument as described in any one of claims 1 to 11.

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