Laser hair removal instrument

Abstract

The invention discloses a laser hair removal instrument which comprises a main machine frame and further comprises a power source assembly, a laser assembly, a cooling assembly and a control and safety assembly which are installed on the main machine frame. Wherein the power supply assembly comprises a power supply socket and a conversion power supply, and the conversion power supply is used for converting the voltage of an external power supply connected with the power supply socket into the laser assembly; the laser hair removal instrument is provided with the flow sensor, the flow information, detected by the flow sensor, of the liquid cooling pipeline is obtained through the control panel in the self-inspection stage in the starting process of the laser hair removal instrument, and when the flow information represents that the flow of the liquid cooling pipeline is larger than or equal to the preset flow threshold value and other self-inspection conditions are met, the flow sensor is started; the switching power supply is controlled to supply power to the laser, the situation that the expected cooling effect cannot be achieved due to insufficient flow caused by the problems of distortion, blockage or leakage of the liquid cooling pipeline is avoided, and therefore it can be ensured that the expected cooling effect can be achieved under the effect of the flow self-checking item.

Description

Technical Field

[0001] This invention relates to the field of laser hair removal technology, specifically to a laser hair removal device. Background Technology

[0002] In today's society, people are paying increasing attention to their personal image, making hair management an important part of personal care and beauty. Excessive hair growth not only affects appearance but can also cause psychological stress for some people.

[0003] In the early days, people mainly relied on traditional methods such as razors, tweezers, depilatory creams, and waxing. While razors are simple to use and inexpensive, quickly removing hair from the skin's surface, the effect is only temporary; hair quickly regrows, and frequent use can lead to thicker, coarser hair, and easily cause cuts and infections. Tweezers can remove hair from the root, slowing down the hair regrowth cycle; however, the process is painful, and improper use can damage hair follicles, causing folliculitis. Depilatory creams and waxing work by dissolving hair with chemicals or using sticky substances to remove it, but these also carry the risk of skin allergies. The pain of waxing is unbearable for many, and none of these traditional methods can achieve permanent hair removal. To achieve permanent or long-lasting hair removal, people have continuously tried new methods. Laser hair removal technology emerged in this context and has continued to evolve, becoming an effective way to solve the problem of excessive hair growth. Furthermore, to prevent skin burns during laser hair removal, existing laser hair removal devices have incorporated cooling systems to ensure the treatment head of the treatment handpiece remains within a suitable temperature range. However, in developing this invention, the inventors discovered that existing cooling systems sometimes fail to achieve the desired cooling effect due to insufficient water flow in the pipes. Summary of the Invention

[0004] The technical problem to be solved by the embodiments of the present invention is to overcome the existing defects and provide a laser hair removal device. This device is equipped with a flow sensor. During the self-test phase of the laser hair removal device's startup process, the control board acquires the flow information of the liquid cooling pipeline detected by the flow sensor. When the flow information indicates that the flow of the liquid cooling pipeline is greater than or equal to a preset flow threshold and other self-test conditions are met, the control switch allows the power supply to power the laser. This avoids insufficient flow due to problems such as twisting, blockage, or leakage in the liquid cooling pipeline, which would prevent the achievement of the expected cooling effect. Therefore, the flow self-test item in the embodiments of the present invention can ensure the achievement of the expected cooling effect and effectively solve the problems in the background art.

[0005] To achieve the above objectives, embodiments of the present invention provide the following technical solution: a laser hair removal device, comprising a main unit frame, and further comprising a power supply component, a laser component, a cooling component, and a control and safety component mounted on the main unit frame; wherein, The power supply assembly includes a power socket and a conversion power supply. The conversion power supply is used to convert the voltage of an external power source connected to the power socket into the voltage required by each power module in the laser assembly, the control and safety assembly, and the cooling assembly, and to supply power to each power module in the laser assembly, the control and safety assembly, and the cooling assembly. The laser assembly includes a laser and a treatment head. The laser is used to generate a laser of a specific wavelength when powered by the conversion power supply, and the laser is transmitted to the treatment head. The cooling assembly includes a liquid storage tank, a water pump, a refrigerator, and liquid cooling pipes. The inlet and outlet of the liquid cooling pipes are both located on the liquid storage tank. The liquid cooling pipes are sequentially connected to the outlet, the water pump, the refrigerator, and the inlet. The liquid cooling pipes between the water pump and the refrigerator flow through the laser to remove the heat generated by the laser. The water pump, powered by the conversion power supply, allows the coolant in the liquid storage tank to circulate in the liquid cooling pipes. The control and safety components include a control board, a display, and a flow sensor. The control board is connected to the display and the flow sensor. The flow sensor is disposed on the liquid cooling pipeline. The control board is used to acquire the flow information of the liquid cooling pipeline detected by the flow sensor during the self-test phase of the laser hair removal device startup process. When the flow information indicates that the flow of the liquid cooling pipeline is greater than or equal to a preset flow threshold and other self-test conditions are met, the control board allows the conversion power supply to power the laser.

[0006] Furthermore, the cooling assembly also includes a fan, which is configured correspondingly to the refrigeration unit; The control and safety components also include a relay and a temperature sensor mounted on the liquid storage tank; The control board is also used to control the relay to turn on so that the fan turns on when the temperature detected by the temperature sensor reaches a preset temperature threshold.

[0007] Furthermore, the conversion power supply includes a switching power supply and a laser driving power supply. The laser driving power supply supplies power to the laser component and the water pump, and the switching power supply supplies power to each power-consuming module other than the laser component and the water pump. The laser drive power supply directly powers the water pump when the laser hair removal device is started, and the control board allows power to be supplied to the laser component after the self-test is passed.

[0008] Furthermore, the conversion power supply includes a switching power supply and a laser driving power supply. The laser driving power supply supplies power to the laser component, and the switching power supply supplies power to each power-consuming module other than the laser component.

[0009] Furthermore, the power supply assembly also includes an AC contactor, the main contacts of which are connected in series between the power socket and the laser drive power supply.

[0010] Furthermore, the control and safety components also include an emergency stop switch, which is disposed between the power socket and the laser drive power supply.

[0011] Furthermore, the laser assembly also includes a treatment handpiece, in which the laser and the treatment head are integrated, and the cooling assembly also includes a cooler disposed between the laser and the treatment head.

[0012] Furthermore, the laser assembly also includes a laser transmission channel, with the laser mounted on the main frame and the laser transmitted to the treatment head via the laser transmission channel.

[0013] Furthermore, the power supply assembly also includes a fuse holder and a fuse. The fuse holder is disposed on the housing of the main unit frame, and the fuse is connected in series between the power socket and the conversion power supply.

[0014] Furthermore, the control and safety components also include an ambient temperature sensor, and the control board is configured with a correspondence table between a preset flow threshold and the ambient temperature. The control board adjusts the preset flow threshold according to the ambient temperature measured by the ambient temperature sensor and the correspondence table.

[0015] Compared with the prior art, the beneficial effects of the embodiments of the present invention are as follows: The laser hair removal device of the present invention is equipped with a flow sensor. During the self-test phase of the laser hair removal device startup process, the control board obtains the flow information of the liquid cooling pipeline detected by the flow sensor. When the flow information indicates that the flow of the liquid cooling pipeline is greater than or equal to a preset flow threshold and other self-test conditions are met, the control switch power supply is allowed to supply power to the laser. This avoids insufficient flow caused by problems such as twisting, blockage or leakage in the liquid cooling pipeline, which would prevent the expected cooling effect from being achieved. Therefore, the expected cooling effect can be ensured under the action of the flow self-test item in the embodiments of the present invention. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a laser hair removal device provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal rear view structure of a laser hair removal device provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal front view structure of a laser hair removal device provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of a cooling component provided in an embodiment of the present invention.

[0017] In the diagram: 1. Main unit frame, 2. Emergency stop switch, 3. Key switch, 4. Treatment handpiece, 5. Monitor, 6. Plug-in interface, 7. Water inlet, 8. Fan, 9. Water outlet, 10. Power socket, 11. Fuse holder, 12. Liquid reservoir, 13. Overflow outlet, 14. Water pump, 15. Filter, 16. Switching power supply, 17. Laser driver power supply, 18. Control board, 19. Interlocking terminal, 20. AC contactor, 21. Relay, 22. Flow sensor, 23. Filter, 24. Refrigeration unit, 25. Foot pedal interface. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] Please see Figure 1-4 The laser hair removal device according to an embodiment of the present invention will be described in detail below: This invention provides a laser hair removal device, including a main frame 1, and further including a power supply component, a laser component, a cooling component, and a control and safety component mounted on the main frame 1.

[0020] It should be noted that "installed on" here refers to the main frame 1 serving as the receiving structure for the power supply component, laser component, cooling component, and control and safety component. It does not mean that each module in the power supply component, laser component, cooling component, and control and safety component is directly installed on the main frame 1; they may also be indirectly installed on the main frame 1. For example, the treatment head and other modules of the laser component are not directly installed on the main frame, but are directly installed in the treatment handpiece.

[0021] In addition to the power supply component, laser component, cooling component, and control and safety component, the laser hair removal device of this embodiment may also include other parts. For example, a housing may be provided for the laser hair removal device for aesthetic and safety reasons, and the laser hair removal device may also include necessary accessories such as a power cord. These are all parts and accessories well known to those skilled in the art, and will not be described in detail in this embodiment.

[0022] Furthermore, the power supply assembly includes a power socket 10 and a conversion power supply. The conversion power supply converts the voltage of the external power supply connected to the power socket 10 into the voltage required by each electrical module in the laser assembly, control and safety assembly, and cooling assembly, and supplies power to each electrical module in these components. The power socket 10 is typically located at the rear of the laser hair removal device for aesthetic reasons and to avoid interfering with operator work. However, in practical applications, it is possible to place the power socket 10 at the front or bottom of the laser hair removal device. For ease of wiring, the conversion power supply is usually located in a location where the electrical modules are concentrated, typically in the upper half of the main frame 1. However, in principle, as long as it can supply power to the electrical modules in the laser assembly, control and safety assembly, and cooling assembly, it is acceptable; this embodiment of the invention does not impose such limitations. This embodiment of the invention provides the required voltage to each electrical module in the laser hair removal device by setting up a conversion power supply.

[0023] Furthermore, the laser component includes a laser and a treatment head. The laser generates a specific wavelength of laser light when powered by a conversion power supply, and the laser light is transmitted to the treatment head. The specific wavelength values ​​in this embodiment of the invention can refer to wavelengths used in existing laser hair removal technologies, such as 808nm, 755nm, and 1064nm. In practical use, the laser uses the electrical energy provided by the conversion power supply to excite atoms or molecules in the laser medium of the laser to an excited state. When these excited atoms or molecules transition to lower energy levels, they generate a specific wavelength of laser light. The laser light is transmitted to the treatment head and focused into a spot of a specific size, irradiating the skin surface. Selective photothermal action destroys the melanin cells in the hair follicles, achieving permanent or lasting hair removal. Generally, the size of the spot is related to the type of equipment, treatment needs, etc., and is usually between 0.3mm and 30mm. Considering the treatment needs of different areas, the spot size is usually adjustable, such as between 10 and 20mm.

[0024] Furthermore, the cooling assembly includes a liquid storage tank 12, a water pump 14, a refrigerator 24, and liquid cooling pipes. The inlet and outlet of the liquid cooling pipes are both located on the liquid storage tank 12. The liquid cooling pipes are sequentially connected to the outlet, water pump 14, refrigerator 24, and inlet. The liquid cooling pipes between the water pump 14 and refrigerator 24 flow through the laser to remove the heat generated by the laser. The water pump 14, powered by a converter, circulates the coolant in the liquid storage tank 12 through the liquid cooling pipes. Typically, a filter 13 is also installed between the water pump 14 and refrigerator 24 to filter impurities in the coolant and prevent blockage of the liquid cooling pipes. When the cooling assembly includes a filter 13, the liquid cooling pipes are sequentially connected to the outlet, water pump 14, filter 13, refrigerator 24, and inlet. The liquid cooling pipes between the filter 13 and refrigerator 24 flow through the laser to remove the heat generated by the laser.

[0025] In practical applications, considering that the upper part of the main frame of the laser hair removal device typically houses components such as a power conversion unit and a control board 18, the liquid storage tank 12 is usually located in the lower part of the main frame 1, the water pump 14 is usually located at the bottom or side of the liquid storage tank 12, and the coolant 24 is also usually located in the lower part of the main frame 1. This is to prevent the coolant 24 from dissipating heat to the important power-consuming modules located in the upper part, and also to facilitate the spatial layout of each module and the return flow of the coolant. It is understood that the arrangement of the modules in the cooling assembly is not limited to this, as long as the cooling requirements and spatial layout can be considered. This embodiment of the invention does not impose any limitations on this. In addition, the coolant in this embodiment of the invention can be distilled water or a special laser coolant, and this embodiment of the invention does not impose any limitations on this either.

[0026] Furthermore, the control and safety components include a control board 18, a display 5, and a flow sensor 22. The control board 18 is connected to the display 5 and the flow sensor 22. The flow sensor 22 is installed on the liquid cooling pipeline. The control board 18 is used to acquire the flow information of the liquid cooling pipeline detected by the flow sensor 22 during the self-test phase of the laser hair removal device startup process. When the flow information indicates that the flow of the liquid cooling pipeline is greater than or equal to a preset flow threshold and other self-test conditions are met, the control board 18 allows the power supply to be switched to power the laser.

[0027] Specifically, the control board 18 is typically located where the various power-consuming modules are concentrated, usually in the upper part of the main unit frame 1. The control board 18 is used to control functions such as laser emission, energy regulation, safety protection, and user interaction. For ease of operation and viewing, the display 5 is generally located at the top of the main unit frame 1. The display 5 integrates touch functionality and can show information such as equipment readiness status, laser energy parameters, number of treatments, and fault codes. The preset flow threshold is a calibrated or empirical value, preferably one that achieves the expected cooling effect.

[0028] It should be noted that the specific locations of the control board 18 and the display 5 are not limited in the embodiments of the present invention.

[0029] In this embodiment of the invention, when the control board 18 is powered on, it performs self-checks on safety-related hardware and system status, such as whether the emergency stop switch 2 is in the pop-up state, whether the interlocking circuit is normal, and whether the MCU (Microcontroller Unit) firmware is complete. These self-check items are existing technologies and will not be described in detail here. The difference is that this embodiment of the invention includes a flow sensor 22, adding a flow rate self-check item.

[0030] Furthermore, in this embodiment of the invention, "permitted" means that, as is well known to those skilled in the art, after the self-test passes, there are usually some other triggering operations. For example, after the operator selects the working mode and working parameters and steps on the foot switch, the controller in the control board 18 will control the power supply to switch to power the laser. This part of the operation is well known to those skilled in the art and can be found in existing technology, so it will not be described in detail here.

[0031] The technical solution of this invention embodiment includes a flow sensor 22 and adds a flow self-test item. Power is only allowed to the laser when all other self-test items and the flow self-test item pass the self-test. This avoids insufficient flow caused by problems such as twisting, blockage or leakage in the liquid cooling pipeline, which would prevent the expected cooling effect from being achieved. Therefore, the expected cooling effect can be ensured under the action of the flow self-test item in this invention embodiment.

[0032] In implementing the embodiments of the present invention, the inventors also discovered that under certain operating conditions, such as when the laser hair removal device is used for a short time or the ambient temperature is low, the cooling component of the present invention can achieve the expected cooling effect. Under other operating conditions, such as when the laser hair removal device is used for a long time or the ambient temperature is high, simply relying on the natural heat dissipation of the cooler 24 cannot achieve the expected cooling effect. A common solution is to equip the cooler 24 with a fan to remove more heat. However, the use of a fan will cause noise problems, disturbing the user and reducing user comfort, while also increasing the power consumption of the laser hair removal device. Therefore, in a specific embodiment of the present invention, the cooling component may further include a fan 8, which is correspondingly configured with the cooler 24; the control and safety component further includes a relay 21 and a temperature sensor disposed on the liquid storage tank 12; the control board 18 is also used to control the relay 21 to turn on so that the fan 8 turns on when the temperature detected by the temperature sensor reaches a preset temperature threshold.

[0033] Specifically, the corresponding arrangement of fan 8 and refrigerator 24 means that the heat sink of refrigerator 24 is located at the air inlet or outlet of fan 8, so that fan 8 can remove the heat from refrigerator 24. Relay 21 is located in the circuit between the power supply and fan 8, and is controlled by control board 18. Furthermore, the preset temperature threshold is a calibrated or empirical value. Setting the preset temperature threshold ensures that fan 8 joins the heat dissipation effort at an appropriate time, balancing cooling effect, noise, and power consumption. The preset temperature threshold should ensure that fan 8 achieves the expected heat dissipation effect after joining the heat dissipation effort, and delay the start-up time of fan 8 as much as possible. Moreover, it is obvious that control board 18 is connected to relay 21 and temperature sensor respectively.

[0034] In this specific embodiment, the fan 8 does not operate until the temperature detected by the temperature sensor reaches the preset temperature threshold, ensuring high user comfort and low power consumption during this stage. When the laser hair removal device is used for an extended period or the ambient temperature is high, causing the temperature sensor to reach the preset temperature threshold, the control board 18 controls the relay 21 to activate the fan 8, ensuring the expected cooling effect. In other words, this specific embodiment balances cooling effect, noise, and power consumption.

[0035] It should be noted that in practical applications, some laser hair removal devices use high-power lasers. In such cases, simply relying on the natural heat dissipation of the cooling unit 24 cannot achieve the desired cooling effect. In this situation, the fan configured for the cooling unit 24 needs to operate synchronously with the cooling unit 24.

[0036] Furthermore, during subsequent research and development, the inventors discovered that, under the same preset flow rate threshold and other parameters, the laser hair removal device occasionally triggered an alarm due to excessive temperature. Through repeated comparisons and considerations, the inventors ultimately determined that the issue was influenced by ambient temperature. Therefore, in one specific embodiment of this invention, the control and safety components further include an ambient temperature sensor. The control board 18 is configured with a correspondence table between the preset flow rate threshold and ambient temperature. The control board 18 adjusts the preset flow rate threshold based on the ambient temperature measured by the ambient temperature sensor and the correspondence table.

[0037] The ambient temperature sensor is placed at a distance from the power conversion, refrigerator, and other heat-generating and heat-dissipating modules to ensure the accuracy of the ambient temperature measured by the sensor.

[0038] In actual testing, the inventors discovered through calibration that the preset flow threshold was higher at higher ambient temperatures and lower at lower ambient temperatures. Based on the calibration results, they configured a correspondence table between the preset flow threshold and ambient temperature in the control board 18 (specifically, in the non-volatile memory on the control board 18). The control board 18 then adjusted the preset flow threshold according to the ambient temperature measured by the ambient temperature sensor and the corresponding table. The results showed consistency in the test indicators under the same other parameters.

[0039] In particular, when the cooling components include a fan, the calibration also takes into account the fan start time as a test indicator. That is, under the premise of ensuring the consistency of start time, a correspondence table between the preset flow threshold and the ambient temperature is calibrated to balance the preset flow threshold, noise and alarm issues.

[0040] In this specific embodiment, an ambient temperature sensor is installed, and a table relating a preset flow rate threshold to the ambient temperature is configured in the control board 18. This allows the control board 18 to adjust the appropriate preset flow rate threshold based on the ambient temperature measured by the sensor and the corresponding table. Because this specific embodiment considers the influence of ambient temperature, it balances issues such as the preset flow rate threshold, noise, and alarms, ensuring the consistency of the laser hair removal device's operation under different ambient temperatures.

[0041] Furthermore, considering the different power supply voltages required by the various power modules in the laser component and the control and safety component, and the different protection and stability requirements of the laser component and the control and safety component, combined with factors such as power consumption and supply chain, it is necessary to provide corresponding power supply designs for each power module of different components. Therefore, in one specific embodiment of this invention, the conversion power supply may include a switching power supply 16 and a laser drive power supply 17. The laser drive power supply 17 supplies power to the laser component and the water pump 14, while the switching power supply 16 supplies power to all power modules other than the laser component and the water pump 14. The laser drive power supply 17 directly supplies power to the water pump 14 when the laser hair removal device is started, and after a self-test, the control board 18 allows it to supply power to the laser component.

[0042] Specifically, the voltages provided by the switching power supply 16 and the laser driver power supply 17 can be determined based on the power supply voltage required by the laser components and water pump 14, as well as other electrical modules besides the laser components and water pump 14, such as the display 5 and control board 18. For example, in a practical application, the laser components and water pump 14 require a 24V voltage, while the display 5, control board 18, and other electrical modules require a 12V voltage. Therefore, a laser driver power supply 17 capable of providing a 24V voltage output and a switching power supply 17 capable of providing a 12V voltage output are selected. The placement of the switching power supply 16 and the laser driver power supply 17 can be flexibly set according to the spatial layout.

[0043] In this specific embodiment, the water pump 14 is powered by the laser driver power supply 17 because some laser hair removal devices, especially commercial laser hair removal devices, require the water pump 14 to provide strong power, i.e., a larger supply voltage. Typically, the voltage provided by the laser driver power supply 17 is greater than the voltage provided by the switching power supply 16. Therefore, the laser driver power supply 17 is used to power the water pump 14.

[0044] In this specific embodiment, the control and safety components and the laser components use different power supplies, so that the control and safety components and the laser components can operate relatively independently. When the laser components are shut down by the control board 18 due to safety events or other reasons, the necessary control and safety components can be made to operate normally, such as the control board 18 recording faults and the display 5 displaying faults.

[0045] Obviously, regarding the use of dual power supply, there are other implementation methods in this embodiment of the invention. For example, when the power supply voltage required by the water pump 14 matches that of the switching power supply 16 (this could be the case where the laser hair removal device uses a water pump with a lower power supply voltage, or the case where the switching power supply used by the laser hair removal device can provide a higher power supply voltage), in another specific embodiment of this invention, the power conversion power supply may include the switching power supply 16 and the laser drive power supply 17. The laser drive power supply 17 supplies power to the laser component, and the switching power supply 16 supplies power to each power module other than the laser component.

[0046] It should also be noted that the embodiments of the present invention do not exclude the use of a single conversion power supply to power all power modules.

[0047] Furthermore, considering the high voltage stability requirements of the laser component, in one specific embodiment of the present invention, the power supply component further includes an AC contactor 20, the main contacts of which are connected in series between the power socket 10 and the laser drive power supply 17.

[0048] In this specific embodiment, when a safety event such as undervoltage or loss of voltage occurs due to various reasons, the AC contactor 20 can actively disconnect the electrical connection between the power socket 10 and the laser drive power supply 17 to protect the safety of the laser drive power supply and the laser components. Since the switching power supply 16 is not affected, the normal operation of the control and safety components can be guaranteed at the same time.

[0049] Furthermore, considering that laser hair removal devices may experience emergency or abnormal situations such as uncontrolled laser emission, mechanical failure of the treatment head, or sudden discomfort in the patient during operation, in order to ensure the safety of operators and patients and avoid equipment damage or escalation of accidents, in one specific embodiment of the present invention, the control and safety component may further include an emergency stop switch 2, which is disposed between the power socket 10 and the laser drive power supply 17.

[0050] To facilitate user operation, the emergency stop switch 2 is typically located on the front of the laser hair removal device, specifically in the upper half. In practical applications, it is usually red for easy identification. For example, the emergency stop switch 2 may be a red mushroom-shaped button.

[0051] This specific embodiment addresses emergency or abnormal situations by incorporating an emergency stop switch. The emergency stop switch 2 can be manually pressed to disconnect the electrical connection between the power socket 10 and the laser drive power supply 17, ensuring the safety of operators and patients and preventing equipment damage or escalation of accidents. Furthermore, since the emergency stop switch 2 is located between the power socket 10 and the laser drive power supply 17, operating the emergency stop switch 2 does not affect the power supply from the power socket 10 to the switching power supply 16, thus ensuring the normal operation of the control and safety components.

[0052] Furthermore, considering patient comfort, in one specific embodiment of the present invention, the laser assembly may further include a treatment handle 4, in which the laser and treatment head are integrated, and the cooling assembly further includes a cooler disposed between the laser and the treatment head.

[0053] To facilitate operation and connection between the treatment handpiece 4 and the main unit, a flexible conduit for signal lines, power lines, and liquid cooling lines can be installed between the treatment handpiece 4 and the main unit in practical applications. For the cooler, a combination of a TEC semiconductor cooling chip and a sapphire cooling head is used. Experiments show that the cooling components, in conjunction with the cooler, can reduce the temperature of the treatment head to the freezing point. Thus, when the treatment head is in close contact with the skin, more heat is absorbed through heat conduction, effectively relieving patient pain, significantly improving patient comfort, and preventing laser burns to the skin.

[0054] It should be noted that in practical applications, the laser can also be set separately from the treatment head. For example, in another specific embodiment of the present invention, the laser assembly may further include a laser transmission channel, with the laser mounted on the main frame 1, and the laser generated by the laser transmitted to the treatment head via the laser transmission channel.

[0055] In practical use, the laser can be connected to the treatment head through a flexible tube. The laser transmission channel is set inside the flexible tube, and the laser transmission method can be selected from light guide arm transmission, direct transmission, or fiber optic transmission.

[0056] Furthermore, considering safety issues, a fuse is typically connected in series between the power socket of the laser hair removal device and the conversion power supply. This fuse melts promptly when the current is too high, cutting off the main power supply and providing short-circuit and overload protection. During the development of this invention, the inventors also discovered that existing laser hair removal devices are usually housed inside the casing, making them difficult to disassemble. Therefore, in one specific embodiment of this invention, the power supply assembly may further include a fuse holder 11 and a fuse. The fuse holder 11 is disposed on the casing of the main unit frame 1, and the fuse is connected in series between the power socket 10 and the conversion power supply.

[0057] The fuse holder 11 is detachably mounted on the outer shell of the main unit frame 1. For example, the outer shell of the main unit frame 1 has a fuse holder slot, and the fuse holder 11 is plugged into the fuse holder slot, or the fuse holder 11 is threaded onto the outer shell of the main unit frame 1 by bolts. This arrangement makes it convenient for users to replace the fuse on the fuse holder 11 without disassembling the main unit.

[0058] It should be noted that, in practical applications, the laser hair removal device of this invention may also include some other designs.

[0059] For example, in one specific embodiment of the present invention, the control and safety component may further include an air switch and a key switch 3, both of which are connected in series in the main circuit between the power socket and the conversion power supply.

[0060] Among them, key switch 3 is a physical mechanical switch. After inserting the key and rotating it, the entire laser hair removal device is powered on, enabling operation authorization and preventing unauthorized personnel from accidentally starting it. The air switch is used to automatically trip and cut off the power supply to the entire device in the event of a safety event such as an overload or short circuit in the main circuit.

[0061] For example, in another specific embodiment of the present invention, the power supply component may further include a filter 15. The filter 15 is also connected in series in the main circuit between the power socket and the conversion power supply to filter out high-frequency electromagnetic interference in the connected power grid. In practical applications, the filter 15 can be an EMI (Electromagnetic Interference) filter, which can effectively suppress electromagnetic interference.

[0062] Furthermore, considering the connection between the treatment handle 4, foot switch, and the main unit, in another specific embodiment of the present invention, the laser hair removal device may also include a peripheral port assembly, which includes a plug-in interface 6, a foot switch interface 25, and an interlock terminal 19. For aesthetic reasons, the plug-in interface 6, foot switch interface 25, and interlock terminal 19 are typically located at the rear of the laser hair removal device. The plug-in interface 6 is used for plugging and unplugging the treatment handle 4, the foot switch interface 25 is used for plugging and unplugging the foot switch, and the interlock terminal 19 can be linked with the laser to form a safety interlock. Specifically, this is achieved through electrical connection between the control board 18 and the laser drive power supply 17 for coordinated control. When the interlock signal is interrupted, the control board 18 sends a signal to forcibly cut off the laser emission path. This linkage control improves safety and reliability.

[0063] Furthermore, considering the needs for adding and draining water from the storage tank 12, in one specific embodiment of the present invention, the storage tank 12 is provided with a water inlet 7, a water outlet 9, and an overflow outlet 13. The water inlet 7 is located at the upper part of the storage tank 12, while the water outlet 9 and the overflow outlet 13 are both located at the lower part of the storage tank 12. The water inlet 7 facilitates the addition of coolant, and the overflow outlet 13 is connected to the outside of the equipment via a short pipe to prevent excessive coolant overflow.

[0064] Furthermore, to fully consider the risk of burns to patients, in a specific embodiment of the present invention, when the cooling component includes a cooler, the control and safety component may further include a second temperature sensor disposed on the cooling head of the cooler, and the second temperature sensor is connected to the control board. When the second temperature sensor detects that the temperature of the cooling head is higher than a second preset temperature threshold, the control board cuts off the power supply to the laser.

[0065] The second preset temperature threshold is an empirical value, or it can be determined based on the patient's sensation during the trial phase of the laser hair removal device.

[0066] In this specific embodiment, when the temperature of the cooling head of the cooler exceeds the second preset temperature threshold, the power supply to the laser can be cut off in time, thus minimizing the risk of burns to the patient.

[0067] Furthermore, considering the risk of energy leakage when the treatment head is not in contact with the skin, in one specific embodiment of the present invention, the control and safety component may further include a pressure sensor disposed on the treatment head, which is connected to the control board. When the pressure sensor detects that the pressure between the treatment head and the skin is higher than a preset pressure threshold, the control board controls the power supply to switch to power the laser.

[0068] The preset pressure threshold is determined by considering both user experience and the need to prevent energy leakage. For example, in practical applications, the preset pressure threshold can be 5N.

[0069] In this specific embodiment, the control board only controls the power supply to power the laser when the pressure sensor detects that the pressure between the treatment head and the skin is higher than the preset pressure threshold, thus avoiding the risk of energy leakage.

[0070] It is worth noting that, in this embodiment, the contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0071] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. In the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. Each embodiment focuses on describing the differences from other embodiments.

[0072] The above are merely embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A laser hair removal device, comprising a main frame (1), characterized in that, It also includes a power supply assembly, a laser assembly, a cooling assembly, and a control and safety assembly mounted on the host frame (1); wherein, The power supply assembly includes a power socket (10) and a conversion power supply. The conversion power supply is used to convert the voltage of an external power source connected to the power socket (10) into the voltage required by each power module in the laser assembly, the control and safety assembly, and the cooling assembly, and to supply power to each power module in the laser assembly, the control and safety assembly, and the cooling assembly. The laser assembly includes a laser and a treatment head. The laser is used to generate a laser of a specific wavelength when powered by the conversion power supply, and the laser is transmitted to the treatment head. The cooling assembly includes a liquid storage tank (12), a water pump (14), a refrigerator (24), and a liquid cooling pipeline. The inlet and outlet of the liquid cooling pipeline are both located on the liquid storage tank (12). The liquid cooling pipeline is connected in sequence to the outlet, the water pump (14), the refrigerator (24), and the inlet. The liquid cooling pipeline between the water pump (14) and the refrigerator (24) flows through the laser to remove the heat generated by the laser. The water pump (14) circulates the coolant in the liquid storage tank (12) in the liquid cooling pipeline under the power supply of the conversion power supply. The control and safety components include a control board (18), a display (5), and a flow sensor (22). The control board (18) is connected to the display (5) and the flow sensor (22). The flow sensor (22) is installed on the liquid cooling pipeline. The control board (18) is used to acquire the flow information of the liquid cooling pipeline detected by the flow sensor (22) during the self-test phase of the laser hair removal device startup process. When the flow information indicates that the flow of the liquid cooling pipeline is greater than or equal to a preset flow threshold and other self-test conditions are met, the control board (18) allows the conversion power supply to power the laser.

2. The laser hair removal device according to claim 1, characterized in that, The cooling assembly also includes a fan (8), which is configured correspondingly to the refrigerator (24); The control and safety components also include a relay (21) and a temperature sensor disposed on the liquid storage tank (12); The control board (18) is also used to control the relay (21) to turn on so that the fan (8) can be turned on when the temperature detected by the temperature sensor (24) reaches a preset temperature threshold.

3. The laser hair removal device according to claim 1, characterized in that, The conversion power supply includes a switching power supply (16) and a laser driving power supply (17). The laser driving power supply (17) supplies power to the laser component and the water pump (14), and the switching power supply (16) supplies power to each power module other than the laser component and the water pump (14). The laser drive power supply (17) directly supplies power to the water pump (14) when the laser hair removal device is started, and the control board (18) allows the laser component to be powered after the self-test is passed.

4. The laser hair removal device according to claim 1, characterized in that, The conversion power supply includes a switching power supply (16) and a laser driving power supply (17). The laser driving power supply (17) supplies power to the laser component, and the switching power supply (16) supplies power to each power module other than the laser component.

5. The laser hair removal device according to claim 3 or 4, characterized in that, The power supply assembly also includes an AC contactor (20), the main contacts of which are connected in series between the power socket (10) and the laser drive power supply (17).

6. The laser hair removal device according to claim 3 or 4, characterized in that, The control and safety components also include an emergency stop switch (2), which is disposed between the power socket (10) and the laser drive power supply (17).

7. The laser hair removal device according to any one of claims 1 to 4, characterized in that, The laser assembly also includes a treatment handle (4), in which the laser and the treatment head are integrated, and the cooling assembly also includes a cooler disposed between the laser and the treatment head.

8. The laser hair removal device according to any one of claims 1 to 4, characterized in that, The laser assembly also includes a laser transmission channel, the laser is mounted on the main frame (1), and the laser is transmitted to the treatment head via the laser transmission channel.

9. The laser hair removal device according to any one of claims 1 to 4, characterized in that, The power supply assembly also includes a fuse holder (11) and a fuse. The fuse holder (11) is disposed on the housing, and the fuse is connected in series between the power socket (10) and the conversion power supply.

10. The laser hair removal device according to any one of claims 1 to 4, characterized in that, The control and safety components also include an ambient temperature sensor. The control board (18) is configured with a correspondence table between a preset flow threshold and the ambient temperature. The control board (18) adjusts the preset flow threshold according to the ambient temperature measured by the ambient temperature sensor and the correspondence table.

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