Human body sensing type far infrared continuous emission device

Abstract

The invention discloses a human body sensing type far infrared continuous emission device which is good in energy-saving effect and capable of reducing use cost and comprises a main controller, a power supply electrically connected with the main controller and a far infrared emission structure. The far infrared emission structure comprises a far infrared heating framework electrically connected with the main controller, a plurality of energy storage microcapsules dispersedly embedded on the far infrared heating framework, and a first temperature sensor electrically connected with the main controller and used for detecting the temperature of the far infrared heating framework; the second temperature sensor is electrically connected with the main controller and used for detecting the temperature of the energy storage microcapsule, and the energy storage microcapsule at least extends out of one face, facing the human skin, of the far infrared heating framework; each energy storage microcapsule comprises a heat-conducting transparent capsule shell, a bio-based phase-change heat-conducting matrix filled in the capsule shell, and a plurality of far infrared particles dispersed in the bio-based phase-change heat-conducting matrix, and the main controller receives signals sent by the first temperature sensor and the second temperature sensor and intermittently controls the far infrared heating skeleton to heat.

Description

Technical Field

[0001] This invention relates to the field of far-infrared technology, and in particular to a human-sensing type of continuous far-infrared emitting device. Background Technology

[0002] Far-infrared materials are a class of functional materials that can efficiently emit far-infrared rays or absorb external far-infrared rays and generate a thermal effect. The most widely used far-infrared materials on the market are ceramic far-infrared materials (such as silicon carbide, zirconium dioxide, and alumina) and carbon-based far-infrared materials (activated carbon fiber, carbon nanotubes, and graphene). They absorb external energy such as light, electricity, and heat to excite far-infrared rays (wavelengths in the 4-14μm band). Utilizing the penetrability and resonant absorption effect of far-infrared rays, they intensify molecular vibrations to achieve heating. They are commonly used in physiotherapy products, textiles, and clothing to help promote blood circulation and improve human health. However, currently available far-infrared products that require electrical power have simple structures. They need a continuous electrical input to maintain a continuous "heat supply" to the body, resulting in high energy consumption and increased operating costs. Summary of the Invention

[0003] Therefore, it is necessary to address the above-mentioned shortcomings by providing a human-sensing far-infrared continuous emission device with good energy-saving effect and reduced operating costs.

[0004] A human-sensing, continuous far-infrared emitting device includes a main controller, a power supply electrically connected to the main controller, and a far-infrared emitting structure. The far-infrared emitting structure includes a far-infrared heating frame electrically connected to the main controller, a plurality of energy storage microcapsules dispersed and embedded on the far-infrared heating frame, a first temperature sensor electrically connected to the main controller and used to detect the temperature of the far-infrared heating frame, and a second temperature sensor electrically connected to the main controller and used to detect the temperature of the energy storage microcapsules. The energy storage microcapsules extend at least from the side of the far-infrared heating frame facing the human skin. Each energy storage microcapsule includes a thermally conductive transparent capsule shell, a bio-based phase change thermally conductive matrix filled within the capsule shell, and a plurality of far-infrared particles dispersed in the bio-based phase change thermally conductive matrix. The main controller receives signals sent by the first and second temperature sensors and intermittently controls the far-infrared heating frame to heat up.

[0005] In one embodiment, the main controller controls the far-infrared heating frame to heat up sequentially at a second heating temperature T2, a first heating temperature T1, and a phase transition temperature Tmid. The main controller receives temperature values ​​sent by a first temperature sensor and controls the duration of the second heating temperature T2, the first heating temperature T1, and the phase transition temperature Tmid. The first heating temperature T1 is 40-45°C, the second heating temperature T2 is 50-55°C, and the phase transition temperature Tmid is related to the material of the bio-based phase change thermal conductive matrix.

[0006] In one embodiment, the duration of the second heating temperature T2, the duration of the first heating temperature T1, and the duration of the phase transition temperature Tmid are the same.

[0007] In one embodiment, the bio-based phase change thermally conductive matrix comprises 60% lauric acid and 40% myristic acid by mass, and the phase change temperature Tmid during far-infrared heating of the frame is 35.8-36.2℃; or The bio-based phase change thermally conductive matrix comprises 70% myristic acid and 30% palmitic acid by mass, and the phase change temperature (Tmid) during far-infrared heating of the frame is 37.5-38.0℃; or The bio-based phase change thermally conductive matrix comprises 50% lauric acid and 50% n-tetradecane by mass, and the phase change temperature Tmid during far-infrared heating of the frame is 32.0-33.5℃; or The bio-based phase change thermally conductive matrix comprises 30% n-tetradecane and 70% n-hexadecane by mass, and the phase change temperature Tmid during far-infrared heating of the frame is 34.5-35.5℃; or The bio-based phase change thermal conductive matrix consists of 60% myristic acid, 20% stearic acid, and 20% palm kernel oil by mass. The phase change temperature Tmid during far-infrared heating of the frame is 36.0-37.0℃.

[0008] In one embodiment, the main controller stops heating when it receives a second monitoring temperature t2 sent by the second temperature sensor, and resumes heating when it receives a first monitoring temperature t1 sent by the second temperature sensor; the first monitoring temperature t1 = phase transition temperature Tmid - X, the second monitoring temperature t2 = second heating temperature T2 - Y, X is 3-5℃, and Y is 3-5℃.

[0009] In one embodiment, the human-sensing far-infrared continuous emission device further includes a switch electrically connected to the main controller and the far-infrared heating frame, and a timer electrically connected to the main controller. The main controller controls the switch to open when it receives a second monitoring temperature t2 sent by the second temperature sensor, and controls the switch to close when it receives a first monitoring temperature t1 sent by the second temperature sensor.

[0010] In one embodiment, the second temperature sensor is used to detect the temperature of the surface of the energy storage microcapsule in the middle of the far-infrared heating frame.

[0011] In one embodiment, the capsule shell is made of bio-based silicone or polyurethane material.

[0012] In one embodiment, the far-infrared particles include graphene particles and carbon nanotube particles; the far-infrared heating frame is made of graphene or carbon nanotube material.

[0013] In one embodiment, each of the energy storage microcapsules is connected via a capsule bag located on the side of the far-infrared heating frame facing away from human skin; or each energy storage microcapsule is set independently.

[0014] The human-sensing far-infrared continuous emission device of the present invention disperses and embeds several energy storage microcapsules on the far-infrared heating frame. When the main controller controls the far-infrared heating frame to be energized and heated, the bio-based phase change thermally conductive matrix in the energy storage microcapsules can absorb and store heat, and then slowly release it. This reduces heat loss during the heating process of the far-infrared heating frame and extends the heating time after one heating. By collecting the temperature of the far-infrared heating frame and the energy storage microcapsules, while ensuring continuous and stable heat output, the far-infrared heating frame can be made to work intermittently. This replaces the heating method of continuous energization of far-infrared materials, effectively reducing the energy consumption of far-infrared products and helping to reduce the cost of using far-infrared products. Attached Figure Description

[0015] Figure 1 This is a circuit module connection diagram of a human-sensing far-infrared continuous emission device in one embodiment of the present invention; Figure 2 This is a schematic diagram of a far-infrared emitting structure in one embodiment of the present invention; Figure 3 This is a schematic diagram illustrating the working principle of the far-infrared emitting structure in one embodiment of the present invention; Figure 4 for Figure 3 A partially enlarged structural diagram of part A in the illustrated embodiment; Figure 5This is a schematic diagram of the far-infrared emitting structure in another embodiment of the present invention; Figure 6 This is a curve showing the relationship between energy storage temperature and energy storage time during far-infrared heating of the frame in one embodiment of the present invention. Detailed Implementation

[0016] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0017] This invention discloses a human-sensing far-infrared continuous emitting device with good energy-saving effect and reduced usage cost. This human-sensing far-infrared continuous emitting device can be applied to fabrics, clothing, goggles, bracelets, etc. covering the human body surface. By emitting far-infrared rays, the resonance absorption effect of far-infrared rays causes the molecules in the skin irradiated by far-infrared rays to resonate with the far-infrared rays, thereby amplifying the vibration of water molecules in the skin, promoting the increase of subcutaneous temperature, achieving a body-feeling heating effect, accelerating human blood circulation and promoting the improvement of human physiological state.

[0018] For specific details, please refer to... Figure 1-4The human-sensing far-infrared continuous emitting device of this embodiment includes a main controller 100, a power supply 200 electrically connected to the main controller 100, and a far-infrared emitting structure 300. The main controller 100 can be an MCU chip or a PLC controller, etc. Depending on the application scenario, the power supply 200 can be a rechargeable power module, or a disposable battery such as a dry cell battery or a button cell battery. The power supply 200 is used to provide the working voltage for the far-infrared emitting structure 300 during heating. The main controller 100 is used to control the heating timing of the far-infrared emitting structure 300, which includes the heating time point and the duration of heating. The far-infrared emitting structure 300 includes a far-infrared heating frame 310 electrically connected to the main controller 100, a plurality of energy storage microcapsules 320 dispersedly embedded on the far-infrared heating frame 310, a first temperature sensor 330 electrically connected to the main controller 100 and used to detect the temperature of the far-infrared heating frame 310, and a second temperature sensor 340 electrically connected to the main controller 100 and used to detect the temperature of the energy storage microcapsules 320. This can be understood as follows: the far-infrared heating frame 310 is a conductive structure made of far-infrared material that absorbs electrical energy and emits far-infrared rays when energized. Simultaneously, the far-infrared heating frame 310 generates heat, producing thermal radiation. The temperatures of the far-infrared heating frame 310 and the energy storage microcapsule 320 can be accurately detected by the first temperature sensor 330 and the second temperature sensor 340, allowing for control of the intermittent heating of the far-infrared heating frame 310 and ensuring the stability of the radiated heat. In this embodiment, the energy storage microcapsule 320 extends at least from the side of the far-infrared heating frame 310 facing the human skin, so that the heat and far-infrared rays released by both the far-infrared heating frame 310 and the energy storage microcapsule 320 can simultaneously act on the human body, ensuring heating effectiveness and extending the heating duration. The energy storage microcapsule 320 includes a thermally conductive transparent capsule shell 321, a bio-based phase change thermally conductive matrix 322 filled in the capsule shell 321, and a number of far-infrared particles 323 dispersed in the bio-based phase change thermally conductive matrix 322. The main controller 100 receives signals sent by the first temperature sensor 330 and the second temperature sensor 340 and intermittently controls the far-infrared heating frame 310 to heat up.

[0019] Please combine Figure 1 and Figure 6During the operation of the human-sensing far-infrared continuous emission device, the main controller 100 controls the far-infrared heating frame 310 to heat up sequentially at a second heating temperature T2, a first heating temperature T1, and a phase transition temperature Tmid. The second heating temperature T2 is greater than the first heating temperature T1, and both the second heating temperature T2 and the first heating temperature T1 are greater than the phase transition temperature Tmid. The main controller 100 controls the heating temperature of the far-infrared heating frame 310 by controlling the current or voltage transmitted to it. Within one heating cycle T of the far-infrared heating frame 310, the heating temperature gradually decreases, and each heating temperature segment remains stable for a period of time, thus maintaining the temperature of the far-infrared heating frame 310 at the preset heating temperature. The main controller 100 receives the temperature value sent by the first temperature sensor 330 and controls the duration of the second heating temperature T2, the first heating temperature T1, and the phase change temperature Tmid. That is, within one heating cycle of the far-infrared heating frame 310, when the temperature value sent by the first temperature sensor 330 received by the main controller 100 first reaches the second heating temperature T2, the main controller 100 controls the corresponding timing module to start timing. When the main controller 100 continuously receives the second heating temperature T2 sent by the first temperature sensor 330 for a predetermined duration, the main controller 100 controls the current to decrease at the far-infrared heating frame 310, causing the temperature of the far-infrared heating frame 310 to drop. When the main controller 100 receives the first heating temperature value T1, it controls the timing module to start timing again. When the main controller 100 continues to receive the first heating temperature T1 for a predetermined duration, the main controller 100 again controls the current to decrease at the far-infrared heating frame 310, causing the temperature of the far-infrared heating frame 310 to drop further. When the main controller 100 receives the phase change temperature Tmid, it controls the timing module to start timing again, until the preset phase change temperature Tmid duration is reached, at which point the main controller 100 stops heating the far-infrared heating frame 310. In this embodiment, the first heating temperature T1 is 40-45℃, the second heating temperature T2 is 50-55℃, and the phase change temperature Tmid is related to the material of the bio-based phase change thermally conductive matrix 322. Preferably, the first heating temperature T1 is 42℃ and the second heating temperature T2 is 52℃.

[0020] It should be noted that when the energy storage microcapsules 320 are uniformly distributed on the far-infrared heating frame 310, the surface temperature of the far-infrared emitting structure 300 tends to be uniform during operation. To improve the reliability of the temperature value detected by the second temperature sensor 340, in this embodiment, the second temperature sensor 340 is used to detect the surface temperature of the energy storage microcapsules 320 in the middle of the far-infrared heating frame 310, thus eliminating the influence of ambient temperature or airflow conditions on the energy storage microcapsules 320 at the edge of the far-infrared heating frame 310 when detecting their temperature.

[0021] The main controller 100 stops heating when it receives a second monitored temperature t2 from the second temperature sensor 340, and resumes heating when it receives a first monitored temperature t1 from the second temperature sensor 340. The first monitored temperature t1 = phase transition temperature Tmid - X, and the second monitored temperature t2 = second heating temperature T2 - Y, where X and Y are both 3-5℃. That is, the first monitored temperature t1 is less than the second monitored temperature t2. Thus, when the temperature of the entire far-infrared emitting structure 300 drops to a preset value, the far-infrared heating frame 310 is restarted. When the temperature of the entire far-infrared emitting structure 300 rises to the preset value, heating of the far-infrared heating frame 310 is stopped. In this way, by dynamically adjusting the combination of active radiation (radiation from the far-infrared heating frame 310) and passive radiation (radiation from the energy storage microcapsule 320), rapid and efficient heating and far-infrared energy storage are performed when the temperature drops to the human perception threshold, entering the next cycle, thereby achieving energy saving and improved human perception.

[0022] In addition, in this embodiment, the duration of the second heating temperature T2, the duration of the first heating temperature T1, and the duration of the phase transition temperature Tmid are the same. In other words, the second heating temperature T2, the first heating temperature T1, and the phase transition temperature Tmid each occupy 1 / 3 of the heating cycle T. In actual use, the heating time of the second heating temperature T2 is controlled within 1 / 3 of the heating cycle T so as to excite far-infrared particles 323 while rapidly storing energy. The heating time of the first heating temperature T1 is also controlled within 1 / 3 of the heating cycle T. The heating time of the phase transition temperature Tmid ends when the second monitoring temperature t2 is detected.

[0023] In one embodiment, the human-sensing far-infrared continuous emitting device further includes a switch 400 electrically connected to the main controller 100 and the far-infrared heating frame 310, and a timer 500 electrically connected to the main controller 100. The main controller 100 controls the switch 400 to open when it receives a second monitored temperature t2 from the second temperature sensor 340, and controls the switch 400 to close when it receives a first monitored temperature t1 from the second temperature sensor 340. This ensures that the far-infrared emitting structure 300 stably radiates far-infrared light and temperature while enabling the main controller 100 to intermittently heat the far-infrared heating frame 310, thereby reducing energy consumption and operating costs. The timer 500 starts timing when the main controller 100 receives a specific heating temperature, in order to control the heating duration of the far-infrared heating frame 310 at different heating stages.

[0024] In one embodiment, the far-infrared heating frame 310 is made of graphene or carbon nanotubes. Graphene has a thermal conductivity of 5000 W / (mK), and carbon nanotubes have a thermal conductivity of 3000 W / (mK). It serves as the heater for a human-sensing, continuous far-infrared emitting device, radiating heat and far-infrared rays to the human body and the energy storage microcapsule 320, and periodically replenishing the energy storage microcapsule 320. This, combined with the energy storage microcapsule 320, ultimately forms a highly efficient, energy-saving, and morphologically stable bio-based composite phase change material component that can output far-infrared rays for an extended period after a single heating. Graphene and carbon nanotubes, as known core materials for excited far-infrared emission, exhibit intensified vibrations of carbon atoms in their crystal lattice under external energy excitation, with vibration frequencies falling precisely in the far-infrared band, thus radiating far-infrared rays. Specifically, when graphene or carbon nanotube materials are energized, they undergo a Joule heating effect. Electrons flowing within the graphene and carbon nanotubes collide with the carbon atom lattice, transferring energy to the lattice and intensifying the vibration of carbon atoms, thus raising the temperature of the graphene and carbon nanotubes. Because graphene and carbon nanotubes have a high intrinsic emissivity in the far-infrared band, they can efficiently convert most of their generated heat energy into far-infrared radiation. Therefore, graphene and carbon nanotubes can emit far-infrared rays when energized. Energy storage microcapsules 320 are dispersed on the far-infrared heating frame 310. After the far-infrared heating frame 310 is energized and heated, they can absorb and store the heat generated by the far-infrared heating frame 310, and then slowly release the heat to extend the heating duration after a single heating cycle.

[0025] Furthermore, please combine Figure 3 and Figure 4 The far-infrared heating frame 310 has a plurality of uniformly distributed mesh openings. Each energy storage microcapsule 320 is independently positioned, and these microcapsules are evenly distributed on the far-infrared heating frame 310 and embedded within the corresponding mesh openings. This ensures that when the far-infrared heating frame 310 is powered on and generates heat, the uniformly distributed energy storage microcapsules 320 on its surface can slowly emit far-infrared rays. Thus, the heat and far-infrared rays emitted by the far-infrared heating frame 310, along with the far-infrared rays emitted by the energy storage microcapsules 320, simultaneously act on the human body surface, ensuring a consistent state across the surface of the far-infrared emitting structure 300 and guaranteeing uniform heating of the area where the human body contacts the far-infrared emitting structure 300. Please refer to [link / reference]. Figure 5In another embodiment, each energy storage microcapsule 320 is connected by a capsule bag 350 located on the side of the far-infrared heating frame 310 facing away from human skin. The material and thickness of the capsule bag 350 are exactly the same as those of the capsule shell 321. It can also be understood that each energy storage microcapsule 320 is integrally formed. Several energy storage microcapsules 320 and capsule bags 350 together form a bag containing a bio-based phase change thermal conductive matrix and far-infrared particles. When the far-infrared heating frame 310 is combined with the energy storage microcapsules 320, the bag is placed on the side of the far-infrared heating frame 310 facing away from human skin. The bio-based phase change thermal conductive matrix in the bag carries the far-infrared particles and pushes a part of the bag through the mesh under the action of gravity, thereby forming several energy storage microcapsules 320 on the side of the far-infrared heating frame 310 facing human skin, so as to reduce the molding difficulty of the far-infrared emitting structure.

[0026] The capsule shell 321 is made of bio-based silicone or polyurethane material. This ensures that heat can be transferred from the capsule shell 321 to the bio-based phase change thermal conductive matrix 322, while also allowing the far-infrared rays emitted by the far-infrared heating frame 310 to penetrate the capsule shell 321 and the bio-based phase change thermal conductive matrix 322 and act on the far-infrared particles 323. Furthermore, the choice of bio-based silicone or polyurethane material facilitates the processing of the capsule shell 321, and the surface of the capsule shell 321 is non-irritating to human skin, avoiding allergic reactions.

[0027] It should be noted that in this embodiment, the bio-based phase change thermal conductive matrix 322 achieves heat absorption and release through a change in the state of matter (solid-liquid), thereby achieving a temperature control effect (i.e., repeatedly storing and releasing heat). The most conventional method is similar to an ice pack; the freezing process is energy storage. In the freezer compartment of a refrigerator, the bio-based phase change thermal conductive matrix 322 in the ice pack releases heat, crystallizing from a liquid state to a solid state, completing the "energy storage." During use, energy is released promptly. The solid bio-based phase change thermal conductive matrix 322 (i.e., phase change material) absorbs heat from the surrounding environment and melts back into a liquid state. This phase change process continuously absorbs a large amount of heat, thereby maintaining a low temperature and achieving long-term cold preservation. In this embodiment, a plurality of far-infrared particles 323 are dispersed in the bio-based phase change thermal conductive matrix 322. The purpose is that when the far-infrared heating frame 310 is energized, it radiates heat and emits far-infrared rays. The heat generated by the far-infrared heating frame 310 is conducted to the bio-based phase change thermal conductive matrix 322 through the capsule shell 321. At the same time, part of the far-infrared rays emitted by the far-infrared heating frame 310 is conducted to the bio-based phase change thermal conductive matrix 322 through the capsule shell 321. This causes the bio-based phase change thermal conductive matrix 322 to absorb heat and its temperature to rise. The heat absorbed by the bio-based phase change thermal conductive matrix 322 is further conducted to the far-infrared particles 323, so that the far-infrared particles 323 further emit far-infrared rays after absorbing heat and far-infrared rays. This can also be understood as the bio-based phase change thermal conductive matrix 322 being used for heat storage. Since the heat absorption and release processes of the bio-based phase change thermal conductive matrix 322 require a certain amount of time to complete, this process effectively stores heat. This allows the heat generated by the far-infrared heating frame 310 to be conducted to the far-infrared particles 323 in the bio-based phase change thermal conductive matrix 322 with a delay. This recovers the heat generated by the far-infrared heating frame 310, reduces heat loss, and extends the heating duration of the far-infrared heating frame 310 after a single heating cycle. Preferably, in this embodiment, the far-infrared particles 323 are uniformly dispersed in the bio-based phase change thermal conductive matrix 322 to improve the thermal conductivity of the bio-based phase change thermal conductive matrix 322 for the far-infrared particles 323.

[0028] The bio-based phase change thermal conductive matrix 322 in this embodiment is a bio-based phase change material made from natural biomass. It possesses excellent biodegradability, environmental friendliness, and biocompatibility, effectively preventing the harm to the human body from leakage in special circumstances. It is a sustainable and green material with higher heat storage and release capabilities. The selection of the bio-based phase change thermal conductive matrix 322 is shown in the table below:

[0029] Specifically, in one embodiment, the bio-based phase change thermal conductive matrix 322 comprises 60% lauric acid and 40% myristic acid by mass. The phase change temperature Tmid of the far-infrared heating frame 310 during heating is 35.8-36.2℃. Under these conditions, the latent heat of phase change of the bio-based phase change thermal conductive matrix 322 can reach 185-195kJ / kg. Under the conditions of 25℃ and 100g of material, its heat release time can reach 3.5-4 hours. Its temperature is almost the same as the human body temperature, and the heat release is extremely gentle, making it suitable for close-fitting warmth (such as uterine warming patches and neck warming patches). It has good biocompatibility and is biodegradable. In another embodiment, the bio-based phase change thermal conductive matrix 322 comprises 70% myristic acid and 30% palmitic acid by mass. The phase change temperature Tmid of the far-infrared heating frame 310 during heating is 37.5-38.0℃. Under these conditions, the latent heat of phase change of the bio-based phase change thermal conductive matrix 322 can reach 190-200kJ / kg. Under the conditions of 25℃ and 100g of material, its heat release time can reach 4-4.5 hours. Its heat release temperature is slightly higher than body temperature, and the warmth is more obvious. It is suitable for keeping hands and feet warm outdoors in winter (such as the inner liner of a hand warmer), with high latent heat and long duration. In another embodiment, the bio-based phase change thermal conductive matrix 322 comprises 50% lauric acid and 50% n-tetradecane by mass. The phase change temperature Tmid of the far-infrared heating frame 310 during heating is 32.0-33.5℃. Under these conditions, the latent heat of phase change of the bio-based phase change thermal conductive matrix 322 can reach 175-185kJ / kg. Under the conditions of 25℃ and 100g of material, its heat release time can reach 3-3.5 hours. Its phase change temperature is relatively low, making it suitable for mild warmth in spring and autumn (such as the interlayer of lightweight thermal underwear). It is soft in texture and has good compatibility with fabrics. In another embodiment, the bio-based phase change thermal conductive matrix 322 comprises 30% n-tetradecane and 70% n-hexadecane by mass. The phase change temperature Tmid of the far-infrared heating frame 310 during heating is 34.5-35.5℃. Under these conditions, the latent heat of phase change of the bio-based phase change thermal conductive matrix 322 can reach 180-190kJ / kg. Under the conditions of 25℃ and 100g of material, its heat release time can reach 3.5-4 hours. It has low cost, strong chemical stability, and is suitable for mass production (such as disposable heat packs and cold chain transportation insulation bags). It is not easily deteriorated. In another embodiment, the bio-based phase change thermal conductive matrix 322 comprises 60% myristic acid, 20% stearic acid, and 20% palm kernel oil by mass. The phase change temperature Tmid of the far-infrared heating frame 310 during heating is 36.0-37.0℃. Under these conditions, the latent heat of phase change of the bio-based phase change thermal conductive matrix 322 can reach 170-180kJ / kg. Under the conditions of 25℃ and 100g of material, its heat release time can reach 3.5-4 hours. It uses all bio-based components, is environmentally friendly and biodegradable, and is suitable for people with sensitive skin (such as children's warming products and medical heat therapy patches), with high safety.

[0030] In this embodiment, the far-infrared particles 323 include graphene particles and carbon nanotube particles. Preferably, the far-infrared particles 323 include graphene particles and carbon nanotube particles in a weight ratio of 1:1. When excited by external energy such as light, electricity, or heat, the carbon atoms of the graphene particles and carbon nanotube particles in the bio-based phase change thermally conductive matrix 322 gain energy, resulting in a significant increase in the amplitude and frequency of carbon atom vibrations in the crystal lattice. Due to the single-atom-layer structure of graphene and the tubular conjugated structure of carbon nanotubes, the vibration of carbon atoms is confined to specific modes (such as in-plane stretching vibration and bending vibration). The electromagnetic wave wavelengths corresponding to the inherent frequencies of these vibrations are in the far-infrared range, so the vibrational energy is radiated outward in the form of far-infrared radiation. In this way, the carbon atoms of the graphene particles and carbon nanotube particles are like "precisely tuned bells." External energy makes them "shake," and the frequency of their "shaking" is just right to emit far-infrared rays, so as to radiate far-infrared rays to the outside and act on the human body.

[0031] In the preparation of energy storage microcapsules 320, graphene and carbon nanotube particles are first pretreated to avoid agglomeration. Pretreatment methods for graphene and carbon nanotube particles include ultrasonic treatment and mechanical stirring. Alternatively, surfactants or dispersants can be added to modify them to prevent agglomeration. Subsequently, the bio-based material is heated to a molten state, and pretreated graphene and carbon nanotube particles are added at a mass ratio of 1%-5%. High-speed stirring (1000-2000 rpm) or ultrasonic dispersion (300-500 W power, 30 minutes) is used to uniformly suspend the graphene and carbon nanotube particles in the molten bio-based material (bio-based phase change thermally conductive matrix 322). Near-body temperature phase change materials are preferred. These bio-based materials, with a phase change temperature of 32-40°C, can slowly release heat during curing without burning the skin due to excessive temperature. Typically, a blend of lauric acid and myristic acid is used, mixed in a mass ratio of 6:4. The phase change temperature is about 36°C, which is basically consistent with the human body temperature. The curing heat release process is gentle and lasts for a long time (about 180-200kJ of heat can be stably released per 100g of material).

[0032] After far-infrared particles 323 are dispersed in a bio-based phase change thermally conductive matrix 322, a capsule shell 321 material is selected to encapsulate the far-infrared particles 323 and the bio-based phase change thermally conductive matrix 322 into energy storage microcapsules 320. Considering repeated heating and reuse during the process, the capsule shell 321 is typically made of TPU or silicone material with multiple bending deformation resistance. When using TPU to prepare packaging bags, the capsule shell 321 is made of TPU film or TPU film / fleece composite material (inner TPU layer + outer fleece layer), with a thickness of 120-150um (TPU layer 30-50um, fleece layer 90-100um), a tensile strength greater than or equal to 15MPa (resistant to repeated bending and not easily broken), and a thermal conductivity of 0.18-0.2W / (m·K). Alternatively, the capsule shell 321 is made of silicone (food-grade liquid silicone) with a thickness of 1.5-2.0 mm, a temperature resistance range of -40°C to 200°C, and a tensile elongation at break of 500%.

[0033] The far-infrared heating frame 310 is made from a thin film that has undergone far-infrared radiation conversion rate testing, and achieves uniform heating in a mesh-like structure through FPC technology. The microcapsule phase change material (bio-based phase change thermal conductive matrix 322) requires a specialized mold for storage, and is formed according to the designed shape through silicone hydroforming or TPU hot pressing (i.e., achieving the bonding of the bio-based phase change thermal conductive matrix 322 with the capsule shell 321). The phase change material needs to be injected in a liquid state via quantitative injection and promptly sealed with microcapsules. The phase change material microcapsule assembly (energy storage component) and the far-infrared heating frame 310 are fixed by a structure that effectively ensures heat and energy transfer while maintaining fixation.

[0034] The aforementioned human-sensing far-infrared continuous emission device, by dispersing and embedding several energy storage microcapsules 320 on the far-infrared heating frame 310, allows the bio-based phase change thermally conductive matrix 322 inside the energy storage microcapsules 320 to absorb and store heat when the far-infrared heating frame 310 is powered on and heated by the main controller 100. This reduces heat loss during the heating process of the far-infrared heating frame 310 and extends the heating time after one heating cycle. By collecting the temperatures of the far-infrared heating frame 310 and the energy storage microcapsules 320, the device can achieve intermittent operation of the far-infrared heating frame 310 while ensuring continuous and stable heat output. This replaces the heating method of continuous power supply and heating of far-infrared materials, effectively reducing the energy consumption of far-infrared products and helping to reduce the cost of using far-infrared products.

[0035] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A human-sensing type far-infrared continuous emission device, characterized in that, The system includes a main controller, a power supply electrically connected to the main controller, and a far-infrared emitting structure. The far-infrared emitting structure includes a far-infrared heating frame electrically connected to the main controller, a plurality of energy storage microcapsules dispersed and embedded on the far-infrared heating frame, a first temperature sensor electrically connected to the main controller and used to detect the temperature of the far-infrared heating frame, and a second temperature sensor electrically connected to the main controller and used to detect the temperature of the energy storage microcapsules. The energy storage microcapsules extend at least from the side of the far-infrared heating frame facing the human skin. The energy storage microcapsules include a thermally conductive transparent capsule shell, a bio-based phase change thermally conductive matrix filled in the capsule shell, and a plurality of far-infrared particles dispersed in the bio-based phase change thermally conductive matrix. The main controller receives signals sent by the first temperature sensor and the second temperature sensor and intermittently controls the far-infrared heating frame to heat up.

2. The human-sensing type far-infrared continuous emitting device according to claim 1, characterized in that, The main controller controls the far-infrared heating frame to heat up sequentially at a second heating temperature T2, a first heating temperature T1, and a phase transition temperature Tmid. The main controller receives the temperature value sent by the first temperature sensor and controls the duration of the second heating temperature T2, the first heating temperature T1, and the phase transition temperature Tmid. The first heating temperature T1 is 40-45℃, the second heating temperature T2 is 50-55℃, and the phase transition temperature Tmid is related to the material of the bio-based phase change thermal conductive matrix.

3. The human-sensing type far-infrared continuous emitting device according to claim 2, characterized in that, The duration of the second heating temperature T2, the duration of the first heating temperature T1, and the duration of the phase change temperature Tmid are the same.

4. The human-sensing type far-infrared continuous emitting device according to claim 2, characterized in that, The bio-based phase change thermally conductive matrix comprises 60% lauric acid and 40% myristic acid by mass, and the phase change temperature Tmid during far-infrared heating of the frame is 35.8-36.2℃; or The bio-based phase change thermally conductive matrix comprises 70% myristic acid and 30% palmitic acid by mass, and the phase change temperature (Tmid) during far-infrared heating of the frame is 37.5-38.0℃; or The bio-based phase change thermally conductive matrix comprises 50% lauric acid and 50% n-tetradecane by mass, and the phase change temperature Tmid during far-infrared heating of the frame is 32.0-33.5℃; or The bio-based phase change thermally conductive matrix comprises 30% n-tetradecane and 70% n-hexadecane by mass, and the phase change temperature Tmid during far-infrared heating of the frame is 34.5-35.5℃; or The bio-based phase change thermal conductive matrix consists of 60% myristic acid, 20% stearic acid, and 20% palm kernel oil by mass. The phase change temperature Tmid during far-infrared heating of the frame is 36.0-37.0℃.

5. The human-sensing type far-infrared continuous emitting device according to claim 2, characterized in that, The main controller stops heating when it receives the second monitoring temperature t2 sent by the second temperature sensor, and starts heating again when it receives the first monitoring temperature t1 sent by the second temperature sensor; the first monitoring temperature t1 = phase change temperature Tmid - X, the second monitoring temperature t2 = second heating temperature T2 - Y, X is 3-5℃, and Y is 3-5℃.

6. The human-sensing type far-infrared continuous emitting device according to claim 5, characterized in that, It also includes a switch electrically connected to the main controller and the far-infrared heating frame, and a timer electrically connected to the main controller. The main controller controls the switch to open when it receives a second monitoring temperature t2 sent by the second temperature sensor, and controls the switch to close when it receives a first monitoring temperature t1 sent by the second temperature sensor.

7. The human-sensing type far-infrared continuous emitting device according to claim 1, characterized in that, The second temperature sensor is used to detect the temperature of the surface of the energy storage microcapsule in the middle of the far-infrared heating frame.

8. The human-sensing type far-infrared continuous emitting device according to claim 1, characterized in that, The capsule shell is made of bio-based silicone or polyurethane material.

9. The human-sensing type far-infrared continuous emitting device according to claim 1, characterized in that, The far-infrared particles include graphene particles and carbon nanotube particles; the far-infrared heating frame is made of graphene or carbon nanotube material.

10. The human-sensing type far-infrared continuous emitting device according to claim 1, characterized in that, Each of the energy storage microcapsules is connected via a capsule bag located on the side of the far-infrared heating frame facing away from the human skin; or each energy storage microcapsule is set independently.

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