Laser hair drier integrated with photodynamic therapy

Abstract

The utility model relates to the technical field of laser hair driers, and discloses a laser hair drier integrated with photodynamic therapy, which comprises an outer shell, an air outlet is arranged on the outer shell, and a battery, a semiconductor laser, an optical fiber, a radiating block, a thermoelectric refrigeration sheet, a temperature sensor, a fan and a control panel are arranged in the outer shell. The input end of the optical fiber is in coupling connection with the semiconductor laser, the output end of the optical fiber faces the air outlet, the semiconductor laser is installed on the thermoelectric refrigeration sheet, and the thermoelectric refrigeration sheet is installed on the heat dissipation block; the temperature sensor is installed on the semiconductor laser, and airflow generated by the fan blows to the heat dissipation block and is exhausted from the air outlet. The control panel is electrically connected with the battery, the semiconductor laser, the thermoelectric refrigeration sheet, the temperature sensor and the fan; the utility model has the advantages of convenient to use, reduced user burden and convenient to carry.

Description

Technical Field

[0001] This utility model relates to a laser hair dryer that integrates photodynamic therapy, belonging to the technical field of laser hair dryers. Background Technology

[0002] With environmental changes, work pressure, and life stress, more and more young people are facing hair loss problems. According to relevant statistics, the number of people experiencing hair loss in my country has exceeded 250 million, with those under 30 years old accounting for as much as 84%. This sudden and unexpected hair loss poses a significant challenge to people's mental health and appearance. Therefore, finding a safe and effective solution to address hair loss has become crucial.

[0003] Since the 20th century, laser technology has become a major practical application for humankind, rapidly attracting attention due to its small size, ease of operation, high output, and high power. Semiconductor lasers have shown broad application prospects in fields such as medicine, display technology, military, industrial processing, and scientific research. With in-depth research into the medical field of semiconductor lasers, scientists have discovered that lasers of specific wavelengths can stimulate photobiological modulation (PBM) effects. In this process, photons penetrate tissues and interact with the pigment C complex within mitochondria to increase oxidase activity and enhance mitochondrial function, thereby increasing oxygen consumption and promoting ATP synthesis. ATP synthesis can improve the metabolic activity of hair follicle cells, enhance hair follicle growth, and thus accelerate hair growth. Simultaneously, photon irradiation can also promote the dilation of scalp blood vessels, increasing blood flow, which helps provide more oxygen and nutrients to the hair follicles to support their healthy growth. Furthermore, the PBM effect can reduce the production of free radicals, mitigating the damage of oxidative stress to hair follicle cells, thus protecting the hair follicles from further damage.

[0004] Currently, laser therapy is widely used as a non-drug treatment option for hair loss. Common laser treatment devices include laser helmets and laser therapy instruments. However, these devices usually require users to undergo treatment at fixed times every day or week, which increases the burden on users and makes it difficult to integrate them into their daily lives. In addition, these devices are usually large and inconvenient to carry, especially when users are on business trips or traveling. Utility Model Content

[0005] To address the aforementioned problems in existing technologies, this invention provides a laser hair dryer that integrates photodynamic therapy. It not only integrates with users' daily lives, eliminating the need for dedicated treatment time, but also features a small size for easy portability, making it highly practical.

[0006] The technical solution of this utility model is as follows:

[0007] A laser hair dryer integrating photodynamic therapy includes a housing with an air outlet on the housing and a [missing information - likely a device or component] disposed inside the housing.

[0008] The battery is used to provide operating current;

[0009] Semiconductor lasers are used to emit laser light.

[0010] Optical fiber is used to transmit laser light. Its input end is coupled to a semiconductor laser, and its output end is oriented towards the air outlet.

[0011] A heat sink, used for heat dissipation;

[0012] Thermoelectric coolers are used for heat transfer and temperature control. Semiconductor lasers are mounted on thermoelectric coolers, which are then mounted on heat sinks.

[0013] A temperature sensor, used to detect temperature, is mounted on a semiconductor laser;

[0014] A fan is used to generate airflow, which blows the airflow toward the heat sink and is exhausted from the vent.

[0015] The control board is used to control corresponding actions according to its preset program. The control board is electrically connected to the battery, semiconductor laser, thermoelectric cooler, temperature sensor and fan.

[0016] Furthermore, the optical fiber has a one-to-many structure, with the output ends of multiple optical fibers all connected to the inner wall of the air outlet, and distributed in a ring array on the inner wall of the air outlet.

[0017] Furthermore, the optical fiber is a single-strand structure, and the output end of the single-strand optical fiber is fixedly installed at the center of the air outlet by setting a bracket.

[0018] Furthermore, a lens is provided at the output end of the optical fiber, and an anti-reflection coating is deposited on the lens.

[0019] Furthermore, the lens is one of a plano-mirror, a plano-convex mirror, a biconvex mirror, a plano-concave mirror, and a biconcave mirror.

[0020] Furthermore, the laser wavelength emitted by the semiconductor laser emitter is 400–470 nm and 600–700 nm.

[0021] Furthermore, the housing is also equipped with a switch and a USB charging port. The switch is electrically connected to the control board, and the USB charging port is electrically connected to the battery.

[0022] Furthermore, the heat sink is equipped with a micro pump and a heat pipe. The micro pump is electrically connected to the control board. The heat pipe is filled with a heat-conducting medium and is arranged in a serpentine pattern within the heat sink, with its ends connected to the inlet and outlet of the micro pump, respectively. The heat sink is also provided with multiple heat dissipation holes that penetrate the heat sink. The arrangement of the heat dissipation holes is adapted to the airflow direction generated by the fan, and there is no interference between the heat sink and the heat pipe.

[0023] Furthermore, the heat sink is also provided with a connecting pipe, one end of which is connected to the heat conduction pipe, and the other end extends out of the outer shell. A sealing cap is provided on the end of the connecting pipe that extends out of the outer shell.

[0024] Furthermore, a base plate is provided at the bottom of the heat sink, and an air outlet space is provided between the base plate and the heat sink. The airflow generated by the fan passes through the air outlet space, and a number of heat dissipation teeth are provided in the air outlet space. The heat dissipation teeth connect the heat sink and the base plate together, and there is a gap between adjacent heat dissipation teeth.

[0025] This utility model has the following beneficial effects:

[0026] This invention proposes a laser hair dryer integrating photodynamic therapy. By incorporating a semiconductor laser, optical fiber, heat sink, thermoelectric cooler, temperature sensor, and fan, the laser emitted by the semiconductor laser is projected outwards from the air outlet of the outer casing, enabling laser therapy. Simultaneously, the heat generated by the semiconductor laser is transferred to the heat sink by the thermoelectric cooler. When the fan starts operating, it blows the heat from the heat sink outwards from the air outlet, providing hot air for the user. This integrates treatment with the user's daily life, allowing them to complete the treatment while drying their hair, reducing their time and burden. Furthermore, the hair dryer's compact design makes it easy to carry during travel. Compared to existing technologies, it offers advantages such as ease of use, reduced user burden, and portability. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model;

[0028] Figure 2 This is a schematic diagram of one structure of the optical fiber in this utility model;

[0029] Figure 3 This is a schematic diagram of another optical fiber structure in this utility model;

[0030] Figure 4 This is a schematic diagram of the internal structure of the heat sink in this utility model;

[0031] Figure 5This is a schematic diagram of the connection structure between the heat sink and the thermoelectric cooling element in this utility model;

[0032] Figure 6 This is a partial structural diagram of the interior of the outer shell of this utility model;

[0033] Figure 7 This is a side view of the heat sink in this utility model.

[0034] The reference numerals in the figure are as follows:

[0035] 1. Housing; 2. Battery; 3. Semiconductor laser; 4. Optical fiber; 5. Heat sink; 6. Thermoelectric cooler; 7. Temperature sensor; 8. Fan; 9. Control board; 10. Switch; 11. USB charging port; 12. Lens; 13. Air outlet; 14. Bracket; 15. Micro pump; 16. Heat pipe; 17. Heat dissipation hole; 18. Connecting pipe; 19. Sealing cap; 20. Base plate; 21. Air outlet space; 22. Heat dissipation fins. Detailed Implementation

[0036] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0037] Example: Please refer to Figures 1-7 This embodiment provides a laser hair dryer with integrated photodynamic therapy, including a housing 1 body. The housing 1 body is arranged in an L-shaped structure. An air outlet 13 is provided on one end of the horizontal section of the housing 1 body. Since it is a hair dryer structure, an air inlet should also be provided on the housing 1 body. The location of the air inlet can be set according to the actual situation. For example, it can be set on the other end of the horizontal section of the housing 1 body, or it can be set on one end of the vertical section of the housing 1 body.

[0038] The outer casing 1 houses a battery 2 for providing operating current, a semiconductor laser 3 for emitting laser light, an optical fiber 4 for transmitting laser light, a heat sink 5 for heat dissipation, a thermoelectric cooler 6 for heat transfer and temperature control, a temperature sensor 7 for temperature detection, a fan 8 for generating airflow, a control board 9 for controlling actions according to a preset program, a switch 10 for operation control, and a USB charging port 11 for charging. The input end of the optical fiber 4 is coupled to the semiconductor laser 3, allowing the laser light emitted by the semiconductor laser 3 to be transmitted through the optical fiber 4. The output end of the optical fiber 4 is oriented towards the air outlet 13, so that the laser light transmitted through the optical fiber 4 is finally emitted outward from the air outlet 13 for irradiation therapy. The semiconductor laser 3 is fixedly mounted on the thermoelectric cooler 6, which is fixedly mounted on the heat sink 5. The fan 8 is oriented towards the heat sink 5 and the air outlet 13, so that the airflow generated by the fan 8 blows towards the heat sink 5 and then is exhausted outward from the air outlet 13. The control board 9 is electrically connected to the battery 2, semiconductor laser 3, thermoelectric cooler 6, temperature sensor 7, and fan 8. Through its connection to the battery 2, the control board 9 provides the necessary current to the semiconductor laser 3, thermoelectric cooler 6, temperature sensor 7, and fan 8. The control board 9 can also control the operating status of these components. A switch 10 is electrically connected to the control board 9, and the control board 9 can perform corresponding program control based on the open / closed state of the switch 10. A USB charging port 11 is electrically connected to the battery 2 and is used to charge the battery 2.

[0039] With the aforementioned setup, when the laser hair dryer starts working, the user turns it on using switch 10. The control board 9 performs corresponding program control based on the open / closed state of switch 10, specifically controlling the semiconductor laser 3, thermoelectric cooler 6, temperature sensor 7, and fan 8 to start working. The laser emitted by the semiconductor laser 3 is transmitted through the optical fiber 4 and emitted outward from the air outlet 13. At the same time, the heat generated by the semiconductor laser 3 is transferred to the heat sink 5 by the thermoelectric cooler 6. After the fan 8 starts working, it can blow the heat on the heat sink 5 outward from the air outlet 13 to form hot air for the user. In this way, the treatment can be combined with the user's daily life, allowing the user to complete the corresponding treatment while blow-drying their hair. Temperature sensor 7 detects the temperature on semiconductor laser 3 in real time and transmits the detected temperature value to control board 9. Control board 9 compares this temperature value and, if it finds that the temperature value is higher than its own set program threshold, control board 9 can also control thermoelectric cooling chip 6 to improve its working efficiency, thereby accelerating the heat transfer of semiconductor laser 3, which can reduce the temperature of semiconductor laser 3 and prevent semiconductor laser 3 from malfunctioning due to overheating.

[0040] In this embodiment, the temperature sensor 7 can be a common NTC, PT100, thermocouple, etc., and the switch 10 can have different settings to correspond to different wind speeds and temperatures, which can be set according to the actual situation. The USB charging port 11 can also be replaced with a common power cord plug to directly connect to 100-260V AC power.

[0041] In this embodiment, the optical fiber 4 has a one-to-many structure, and the specific number of lines can be determined according to the actual situation. The output ends of the multiple optical fibers 4 are all connected to the inner wall of the air outlet 13, and are distributed in a ring array on the inner wall of the air outlet 13. The one-to-many structure of the optical fiber 4 can make the light output more uniform, cover a larger scalp area, is suitable for the treatment of the entire scalp, and can improve the treatment efficiency.

[0042] In this embodiment, the optical fiber 4 is a single-strand structure, and the output end of the single-strand optical fiber 4 is fixedly installed at the center of the air outlet 13 by a bracket 14. The single-strand optical fiber 4 has concentrated light output and high energy density, making it suitable for concentrated irradiation of specific areas such as localized hair loss areas of the scalp, resulting in more significant treatment effects and lower manufacturing costs.

[0043] In this embodiment, a lens 12 is provided at the output end of the optical fiber 4. The lens 12 serves to protect the output end of the optical fiber 4 from dust. The lens 12 is coated with an anti-reflection film with a thickness of 400nm-700nm to reduce light attenuation during transmission. The lens 12 can be one of a plano-mirror, plano-convex mirror, biconvex mirror, plano-concave mirror, or biconcave mirror. When the lens 12 is a plano-mirror, it only serves a protective function. When the lens 12 is a plano-convex mirror or a biconvex mirror, it can collimate the light output from the optical fiber 4 into parallel light to enhance the illumination intensity. When the lens 12 is a plano-concave mirror or a biconcave mirror, it can further diverge the light output from the optical fiber 4 to increase the illumination area.

[0044] In this embodiment, the semiconductor laser emitter emits laser wavelengths of 400–470 nm and 600–700 nm. The blue laser with a wavelength of 400–470 nm is effective against some anaerobic bacteria, such as Propionibacterium acnes, which can cause folliculitis. It can also prevent scalp infections, repair sensitive scalps, increase the oxygen content of skin surface cells, and reduce hair loss. The red laser with a wavelength of 600–700 nm can inhibit cyclooxygenase to suppress inflammation, while also promoting blood circulation, stimulating fibroblast formation, and collagen regeneration to reduce acne scarring.

[0045] To enhance the heat dissipation of the heat sink 5, in this embodiment, a micro pump 15 and a heat pipe 16 are installed inside the heat sink 5. The micro pump 15 is electrically connected to the control board 9, which can control the operating state of the micro pump 15. The heat pipe 16 is filled with a heat-conducting medium, which can be water or silicone oil, etc. The heat pipe 16 is arranged in a serpentine pattern inside the heat sink 5, with its ends connected to the inlet and outlet of the micro pump 15, respectively. The heat sink 5 also has multiple heat dissipation holes 17 that penetrate the heat sink 5. The arrangement direction of the heat dissipation holes 17 is adapted to the airflow direction generated by the fan 8, and there is no interference between the heat sink 5 and the heat pipe 16. With the aforementioned setup, when the thermoelectric cooler 6 transfers the heat generated by the semiconductor laser 3 to the heat sink 5, the control board 9 controls the micro pump 15 to start working. The micro pump 15 causes the heat transfer medium to circulate continuously within the heat pipe 16, so as to quickly absorb the heat transferred from the thermoelectric cooler 6 to the heat sink 5 and accelerate the heat transfer speed. The airflow generated by the fan 8 passes through the heat dissipation hole 17, which can carry away the heat from the heat sink 5 and the heat pipe 16. The heat dissipation hole 17, together with the micro pump 15 and the heat pipe 16, can play the role of rapidly heating the airflow generated by the fan 8.

[0046] In this embodiment, the heat sink 5 is also provided with a connecting pipe 18. One end of the connecting pipe 18 is connected to the heat conduction pipe 16, and the other end extends out of the outer casing 1. A sealing cap 19 is provided on the end of the connecting pipe 18 extending out of the outer casing 1. The connecting pipe 18 facilitates the subsequent replacement of the heat conduction medium inside the heat conduction pipe 16. When it is necessary to replace the heat conduction medium, the corresponding replacement work can be carried out by opening the sealing cap.

[0047] In this embodiment, a base plate 20 is provided at the bottom of the heat sink 5, and an air outlet space 21 is provided between the base plate 20 and the heat sink 5. The air outlet space 21 is designed to allow the airflow generated by the fan 8 to pass through the air outlet space. A plurality of heat dissipation teeth 22 are provided in the air outlet space 21. The specific number of heat dissipation teeth 22 can be set according to actual conditions. The heat dissipation teeth 22 connect the heat sink 5 and the base plate 20 together, and a gap is left between adjacent heat dissipation teeth 22. Through the aforementioned arrangement, the heat on the heat sink 5 can be transferred to the heat dissipation teeth 22. The heat dissipation teeth 22 can increase the heat dissipation area, thereby increasing the heat dissipation rate, thus enabling rapid heating of the airflow generated by the fan 8.

[0048] In this embodiment, the design of the heat dissipation fins 22 is determined using the following method:

[0049] Step 1: Determine the length, width, and thickness of the heat sink 5 based on the space constraints of the outer casing 1.

[0050] Step 2: Based on experience, determine the height, width and thickness of the heat dissipation fins 22.

[0051] Step 3: Calculate the number of heat dissipation fins 22.

[0052] The number of heat dissipation fins 22 is calculated according to the following formula:

[0053]

[0054] In the formula, n represents the number of heat dissipation teeth 22, W represents the width of heat dissipation block 5, L represents the length of heat dissipation block 5, s represents the gap between adjacent heat dissipation teeth 22, and w represents the width of heat dissipation teeth 22.

[0055] The gap between adjacent heat dissipation fins 22 is calculated according to the following formula:

[0056]

[0057] In the formula, s represents the gap between adjacent heat dissipation teeth 22, k represents a constant, the value of k is greater than or equal to 1.5, and w represents the width of heat dissipation teeth 22.

[0058] Step 4: Calculate the total heat dissipation area of ​​heat dissipation fins 22.

[0059] The total heat dissipation area of ​​heat dissipation fins 22 is calculated according to the following formula:

[0060]

[0061] In the formula, A represents the total heat dissipation area of ​​the heat dissipation fins 22, n represents the number of heat dissipation fins 22, h represents the height of the heat dissipation fins 22, l represents the length of the heat dissipation fins 22, and w represents the width of the heat dissipation fins 22.

[0062] Step 5: Calculate the thermal resistance and airflow resistance. Based on the calculation results, evaluate whether the heat dissipation performance of the designed heat dissipation fins 22 meets the requirements. The evaluation method is to compare the actual factory requirements with the calculated results to complete the evaluation work.

[0063] Thermal resistance is calculated using the following formula:

[0064]

[0065] In the formula, R represents thermal resistance, c represents the convective heat transfer coefficient of heat dissipation tooth 22, which is taken as 100 to 500, and A represents the total heat dissipation area of ​​heat dissipation tooth 22.

[0066] Air resistance is calculated using the following formula:

[0067]

[0068] In the formula, P represents airflow resistance, p represents air density, v represents airflow velocity, which is determined according to the specific airflow velocity generated by fan 8, C represents the resistance coefficient, which is taken as 1 to 3, n represents the number of heat dissipation teeth 22, h represents the height of heat dissipation teeth 22, and s represents the distance between adjacent heat dissipation teeth 22.

[0069] Step 6: Based on the evaluation results, adjust the size of the heat dissipation fins 22 accordingly, and repeat steps 2 to 6 until they meet the requirements.

[0070] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A laser hair dryer integrated with photodynamic therapy, comprising a housing (1) body, an air outlet (13) is arranged on the housing (1) body, characterized in that: The shell (1) is internally provided with a battery (2) for providing working current, a semiconductor laser (3) for emitting laser, an optical fiber (4) for transmitting laser, an input end of which is coupled with the semiconductor laser (3), and an output end of which is arranged towards an air outlet (13), a heat sink (5) for heat dissipation, a thermoelectric refrigeration sheet (6) for heat transfer and temperature control, the semiconductor laser (3) being mounted on the thermoelectric refrigeration sheet (6), the thermoelectric refrigeration sheet (6) being mounted on the heat sink (5), and a temperature sensor (7) for detecting temperature, which is mounted on the semiconductor laser (3); a fan (8) for generating airflow, the airflow generated by the fan (8) blowing towards the heat sink (5) and being discharged from the air outlet (13); A control board (9) for performing corresponding action control according to a preset program thereof, the control board (9) being electrically connected with the battery (2), the semiconductor laser (3), the thermoelectric refrigeration sheet (6), the temperature sensor (7) and the fan (8) respectively.

2. The laser hair dryer integrated with photodynamic therapy according to claim 1, characterized in that: The optical fiber (4) is of a multi-path structure, the output ends of the multi-path optical fiber (4) being connected to the inner wall of the air outlet (13) and being arranged in a ring array on the inner wall of the air outlet (13).

3. The laser hair dryer integrated with photodynamic therapy according to claim 1, characterized in that: The optical fiber (4) is of a single-path structure, the output end of the single-path optical fiber (4) being fixedly mounted on the center of the air outlet (13) through a support (14).

4. The laser hair dryer integrated with photodynamic therapy according to claim 2 or 3, characterized in that: A lens (12) is arranged on the output end of the optical fiber (4), the lens (12) being coated with an anti-reflection film.

5. The laser hair dryer integrated with photodynamic therapy according to claim 4, characterized in that: The lens (12) is one of a flat mirror, a plano-convex mirror, a biconvex mirror, a plano-concave mirror and a biconcave mirror.

6. The laser hair dryer integrated with photodynamic therapy according to claim 1, wherein: The wavelength of the laser emitted by the semiconductor laser is 400-470 nm and 600-700 nm.

7. The laser hair dryer integrated with photodynamic therapy according to claim 1, wherein: The shell (1) is further provided with a switch (10) and a USB charging port (11), the switch (10) being electrically connected with the control board (9), and the USB charging port (11) being electrically connected with the battery (2).

8. The laser hair dryer integrated with photodynamic therapy according to claim 1, wherein: A micro pump (15) and a heat conducting pipe (16) are arranged inside the heat sink (5), the micro pump (15) being electrically connected with the control board (9), the heat conducting pipe (16) being filled with heat conducting medium, the heat conducting pipe (16) being arranged in a serpentine shape inside the heat sink (5) and having its first end and second end connected with the liquid inlet end and the liquid outlet end of the micro pump (15) respectively, a plurality of heat dissipation holes (17) being formed in the heat sink (5) and extending therethrough, the heat dissipation holes (17) being arranged in a direction corresponding to the direction of the airflow generated by the fan (8), and the heat sink (5) and the heat conducting pipe (16) not interfering with each other.

9. The laser hair dryer integrated with photodynamic therapy according to claim 8, characterized in that: A communication pipe (18) is further arranged on the heat sink (5), one end of the communication pipe (18) being in communication with the heat conducting pipe (16), and the other end of the communication pipe (18) extending out of the shell (1), a sealing cover (19) being arranged on the end of the communication pipe (18) extending out of the shell (1).

10. The laser hair dryer integrated with photodynamic therapy according to claim 8, characterized in that: The bottom of the heat dissipation block (5) is provided with a bottom plate (20), and an air outlet space (21) is arranged between the heat dissipation block (5) and the bottom plate (20). The airflow generated by the fan (8) passes through the air outlet space (21). A plurality of heat dissipation teeth (22) are arranged in the air outlet space (21). The heat dissipation teeth (22) connect the heat dissipation block (5) and the bottom plate (20) together, and gaps are left between adjacent heat dissipation teeth (22).

Images