Cooling structure for lamp body

Abstract

The invention relates to the technical field of lamp body cooling, in particular to a cooling structure for a lamp body, which comprises a front heat dissipation high light transmission assembly, a supply assembly and heat dissipation fins which are arranged on the lamp body in a covering manner, a containing cavity is formed in the front heat dissipation high-light-transmittance assembly and connected with the supply assembly through a pipeline, liquid or gas cooling media can flow through the containing cavity, and the front heat dissipation high-light-transmittance assembly is provided with a temperature sensor. And a cavity for mounting the lamp body is defined by the radiating fins and the side cover plates. The high-power portable lamp can effectively solve the problem of burn caused by skin contact or approaching due to too high temperature, can also avoid the problem that the service life of the lamp is shortened or damaged due to too high temperature rise, and realizes cooperative work of efficient active cooling and passive heat dissipation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lamp body cooling device, and particularly relates to a cooling structure for lamp body. BACKGROUND

[0002] In the application scenarios of portable lighting devices, such as red light physiotherapy, vein exploration, outdoor work, emergency rescue, military operations and professional photography, users have higher requirements for the brightness and portability of lamps. In order to meet the demand for high light output, such lamps usually use high-power light sources, which leads to a significant increase in heat flux density per unit volume. However, the existing small lamps generally lack effective active cooling mechanism and mainly rely on natural convection or passive cooling structure, which is difficult to timely export the heat generated by high-power light sources. The resulting heat accumulation not only limits the continuous working time of the lamp, but also easily causes accelerated light decay of the light source, aging of electronic components and even structural damage, which seriously affects the reliability and service life of the lamp. Although some products try to add metal heat sinks or fans for auxiliary cooling, these solutions often sacrifice the overall sealing, light transmission efficiency or portability of the device, and are prone to failure in harsh environments with high humidity and dust. In addition, there are few lampshade structure designs in the prior art that integrate high light transmission and high cooling efficiency, which cannot achieve effective temperature control of the lamp body while ensuring the quality of light output. Especially in the medical field where the lamp light contacts or approaches the skin, the combination of high heat and radiant heat of the front end cover of the lamp will cause strong burning sensation of the user; therefore, there is an urgent need for a lamp body cooling structure that is compact in structure, excellent in light transmission performance and has active cooling capability to solve the performance limitation and short service life problem of high-power portable lamps due to poor heat dissipation. SUMMARY

[0003] The present application aims to provide a cooling structure for lamp body to overcome the deficiencies in the prior art.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical solutions: A cooling structure for lamp body, comprising a front cooling high-transmission component for covering the lamp body, the front cooling high-transmission component being connected with a supply component providing cooling medium through a pipeline, and an internal cavity being provided in the front cooling high-transmission component for the cooling medium to flow through. The front cooling high-transmission component is in an overall arc structure and covers the front of the lamp body, which not only ensures efficient light transmission, but also serves as a flow channel for the cooling medium to directly absorb and carry away the heat radiated and conducted by the lamp body.

[0005] Further, the front heat dissipation high light transmission assembly comprises a middle-arched inner cover and an outer cover covering the inner cover; the outer cover is shaped to match the inner cover, and the two are fixedly connected at the edges by sealing glue or welding to form a closed containment chamber; the containment chamber extends horizontally, has a supply port at the front end and a discharge port at the tail end, and the supply port and the discharge port respectively penetrate the side walls of the outer cover and the inner cover and are connected with external pipelines; the bottom of the inner cover is further provided with a downwardly extending side cover plate made of non-light transmission material, which is used to shield the non-light emitting area at the rear of the lamp body and prevent stray light from escaping, and simultaneously serves as a structural support connected with the heat dissipation fins.

[0006] Further, the cooling structure further comprises heat dissipation fins made of metal, the upper surface of which is fixedly covered by the bottom of the side cover plate of the inner cover by screws or buckling structure, and the two together enclose a middle chamber in which the lamp body is installed; the bottom surface of the heat dissipation fins is exposed to the external air, and the heat conducted from the lamp body to the side cover plate is dissipated to the environment by natural convection or forced air cooling; a heat-conducting silicone grease layer is arranged between the heat dissipation fins and the side cover plate to reduce the interfacial thermal resistance and improve the heat conduction efficiency.

[0007] Further, a temperature sensor is arranged on the front heat dissipation high light transmission assembly, which is a digital temperature sensor, the sensing probe of which is arranged around and fixedly connected to the top outer periphery of the outer cover, and is electrically connected to the mainboard by a lead wire to collect surface temperature data of the cover in real time; the installation position of the temperature sensor avoids the direct light source area to avoid light-heat interference and temperature measurement deviation.

[0008] The supply assembly has two optional embodiments corresponding to liquid cooling and gas cooling modes respectively. The supply assembly comprises a supply pump, a liquid storage tank, a supply pipe and a discharge pipe; the supply pump is a miniature direct-current diaphragm pump, the liquid inlet of which is communicated with the liquid outlet of the liquid storage tank by a pipeline, and the liquid outlet is connected with the supply port of the front heat dissipation high light transmission assembly by the supply pipe; one end of the discharge pipe is connected with the discharge port of the front heat dissipation high light transmission assembly, and the other end is connected with the liquid inlet of the liquid storage tank, thereby forming a closed liquid circulation loop; the liquid storage tank is filled with low-conductivity cooling liquid, which flows through the containment chamber in the circulation process, returns to the liquid storage tank after absorbing the heat of the cover, and is cooled by heat exchange between the shell of the liquid storage tank and the ambient air; the start-stop and rotating speed of the supply pump are adjusted by the mainboard according to the feedback signal of the temperature sensor, and when the temperature of the cover exceeds the preset threshold, the mainboard controls the supply pump to increase the rotating speed and the flow of the cooling liquid to strengthen the heat dissipation effect.

[0009] In another embodiment, the supply assembly includes a gas filter, a supply pump, a supply pipe and a discharge pipe; the gas filter is a porous filter element structure, the gas inlet of which is connected with the air inlet of the supply pump through a pipeline, for filtering dust and moisture in the ambient air entering the system; the supply pump is a miniature axial flow fan or centrifugal fan, the air inlet of which is communicated with the supply port of the front heat dissipation high light transmission assembly through the supply pipe; one end of the discharge pipe is connected with the discharge port, and the other end is open to the outside; the end of the discharge port is directed downward of the inner cover body, so that the discharged hot air flow flows along the rear side of the lamp body or the surface of the heat dissipation fin, and the residual hot air flow is used for secondary cooling of the lamp body support or the heat dissipation fin area; the operating state of the supply pump is also controlled by the mainboard according to the temperature sensor signal, and automatically switched to high air volume mode under high temperature working condition.

[0010] Further, the supply assembly further includes a control panel, a battery and a mainboard; the control panel is fixed to the side wall of the lamp body shell, and the surface thereof is provided with a key position electrically connected with the mainboard, the key position including a rotary luminance knob and a press switch; the luminance knob outputs an analog signal to the mainboard through a potentiometer, and the mainboard adjusts the lamp body driving current accordingly to realize stepless adjustment of brightness; the switch is used for controlling the on-off of the power supply of the whole machine; the mainboard is provided with a charging socket of USB-C or Micro-USB type, and when the charging socket is connected with an external power adapter, the built-in battery can be charged; the battery is a rechargeable lithium ion battery pack, and the positive and negative electrodes thereof are respectively connected with the power management module of the mainboard through wires; the output end of the mainboard is electrically connected with the LED driving circuit of the lamp body and the motor driving circuit of the supply pump, to realize cooperative power supply and control logic linkage of the lighting and cooling systems.

[0011] In the gas cooling embodiment, the outer surface of the outer cover body is further embedded with a capacitive touch sensor; the sensing electrode of the capacitive touch sensor is arranged at the top non-optical area of the outer cover body, and the signal output end thereof is connected with the touch detection module of the mainboard; when the user's finger touches the capacitive touch sensor, the mainboard recognizes the capacitance change signal, and then triggers two actions: one is to send a start instruction to the lamp body driving circuit to turn on the LED light source; the other is to send a strong cooling working instruction to the supply pump to run at the maximum air volume, and the duration is a preset value or until the next touch is closed; this touch mechanism does not need physical buttons, improves the product sealing and appearance integration, and at the same time realizes the operation logic of "touch to light, synchronous strong cooling".

[0012] Further, the inner cover and the outer cover are made of high light transmittance material, the high light transmittance material is quartz glass, optical grade PMMA or polycarbonate, and the visible light transmittance is not less than 90%; the thickness of the through cavity is between 1.5 mm and 5 mm, so that the cooling medium has sufficient flow area and the cover structure strength is maintained; the inner diameter of the supply port and the discharge port matches the outer diameter of the supply pipe and the discharge pipe, and a quick connector or a threaded sealing structure is used at the interface to prevent the cooling medium from leaking; in the liquid cooling embodiment, the supply pipe and the discharge pipe are flexible silica gel pipes or fluororubber pipes, and the temperature resistance range is -40℃ to 120℃; in the gas cooling embodiment, the supply pipe and the discharge pipe are PVC or TPU materials or silica gel pipes, and have a certain flexibility to adapt to the assembly tolerance.

[0013] Further, the heat dissipation fins are formed of aluminum alloy or copper alloy, and the surface is subjected to anodic oxidation or other treatment to enhance corrosion resistance and radiation heat dissipation capacity; the fins of the heat dissipation fins balance the heat dissipation efficiency and air flow resistance; the connection between the heat dissipation fins and the side cover plate is provided with a positioning pin and a countersunk hole to ensure assembly accuracy and maximize the thermal contact area.

[0014] Further, the main board is integrated with a microcontroller unit (MCU), a power management chip, a motor drive chip and a communication interface; the microcontroller unit pre-stores a multi-stage temperature control strategy, when the temperature sensor detects that the cover temperature is in a first threshold interval, the supply pump runs at low speed; when the temperature rises to a second threshold interval, the supply pump switches to medium speed; when the temperature reaches a third threshold interval, the supply pump runs at full speed, and the luminance knob of the control panel can be linked to adjust the light, and the lamp power is reduced to assist cooling; the temperature control strategy can be adjusted by firmware upgrade to adapt to different use scenarios.

[0015] Compared with the prior art, the beneficial effects of the present application are as follows: The front high-transmittance cooling component with a through cavity is arranged in front of the lamp body, so that the cooling medium directly flows through the inside of the light-transmittance cover, efficiently absorbing the heat radiation and conduction of the light source; at the same time, the bottom heat dissipation fins receive the heat from the rear part of the lamp body, forming a composite heat management path of "front active cooling + rear passive heat dissipation"; the liquid cooling mode is suitable for long-time high-load working conditions, and the gas cooling mode takes into account the lightweight and fast response requirements; the temperature sensor provides real-time feedback, and the main board dynamically adjusts the working state of the supply pump according to the temperature data to realize on-demand cooling; the control panel and the capacitive touch sensor provide multi-modal human-computer interaction, supporting brightness adjustment, power control and touch supercooling functions; the whole system is integrated in a compact structure, which is suitable for red light physiotherapy, red light therapy, vein searchlight, handheld searchlight, tactical lighting equipment, outdoor work light and other high-power portable lamps, solving the problem of reliability reduction caused by insufficient heat dissipation in the prior art.

[0016] Through the above structural design, the junction temperature of the core light emitting element of the lamp body can be maintained within a safe range in the full power continuous working state, so as to avoid light decay acceleration or driving circuit failure caused by heat accumulation; the front heat dissipation high light transmission assembly undertakes the cooling function without sacrificing the optical performance, so as to ensure the light efficiency; the modular design of the supply assembly supports flexible configuration of liquid or gas cooling scheme, and meets the differentiated requirements of weight, noise and maintainability in different application scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is an external structure view of the present application; Figure 2 is a structural schematic view of one embodiment of the present application ignoring the shell and part of the bracket; Figure 3 is a structural schematic view of another embodiment of the present application ignoring the shell and part of the bracket; Figure 4 is a sectional view of the front heat dissipation high light transmission assembly of any embodiment of the present application.

[0018] BRIEF DESCRIPTION OF DRAWINGS 1, control panel; 2, charging socket; 3, front heat dissipation high light transmission assembly; 4, outer cover; 5, inner cover; 6, through cavity; 7, supply port; 8, discharge port; 9, lamp body; 10, heat dissipation fin; 11, supply assembly; 12, supply pipe; 13, discharge pipe; 14, supply pump; 15, liquid storage tank; 16, battery; 17, gas filter; 18, main board; 19, temperature sensor. DETAILED DESCRIPTION

[0019] The present application will be described in detail below in conjunction with the embodiments shown in the drawings: As Figures 1-4 shown, a cooling structure for a lamp body is disclosed, as Figure 1 shown, the overall external structure of the present application includes a control panel 1, a charging socket 2, and a front heat dissipation high light transmission assembly 3 covering the front of the lamp body 9. The assembly as a whole is arched, covering the front of the lamp body 9, which not only ensures efficient light transmission, but also serves as a cooling medium flow passage. As Figure 2 and Figure 3 shown, the internal structure layout after ignoring the shell and part of the bracket in the two embodiments of liquid cooling and gas cooling is respectively shown. Figure 4 is a sectional view of the front heat dissipation high light transmission assembly 3, which clearly shows its internal structure.

[0020] In a specific embodiment of the present application, the front heat dissipation high-transparency assembly 3 is composed of an inner cover 5 and an outer cover 4, both of which are shell structures with a middle arch, and are matched in shape and sealed and fixed along the edges by sealing glue or laser welding to form a closed containment chamber 6. The containment chamber 6 extends in the horizontal direction, has a supply port 7 at the front end and a discharge port 8 at the tail end, and both the supply port 7 and the discharge port 8 penetrate the side walls of the outer cover 4 and the inner cover 5 and are used to connect external pipelines. The inner cover 5 is also provided with a downwardly extending side cover plate made of a non-transparent material (such as black engineering plastic or metal coating) for shielding the non-light-emitting area at the rear of the lamp body 9 to prevent stray light from escaping, and at the same time serving as a structural support connected with the heat dissipation fins 10. As shown in Figure 4 , the heat dissipation fins 10 are made of aluminum alloy, and the upper surface thereof is fixedly covered by the bottom of the side cover plate through screws or buckling structures, and both of them together enclose a chamber in the middle for mounting the lamp body 9. The bottom surface of the heat dissipation fins 10 is exposed to the outside air, and the heat conducted from the lamp body 9 to the side cover plate is dissipated to the environment through natural convection; a layer of heat-conducting silicone grease is coated between the heat dissipation fins 10 and the side cover plate to reduce the interfacial thermal resistance and improve the heat conduction efficiency. The surface of the heat dissipation fins 10 is subjected to anodizing treatment, the fin height is 15 mm, and the spacing between adjacent fins is 3 mm, which ensures good heat dissipation performance while taking into account the air flow resistance.

[0021] In the liquid cooling embodiment (see Figure 3 ), the supply assembly 11 includes a supply pump 14, a liquid storage tank 15, a supply pipe 12 and a discharge pipe 13. The supply pump 14 is a miniature DC diaphragm pump, the inlet thereof is communicated with the outlet of the liquid storage tank 15 through a pipeline, and the outlet is connected with the supply port 7 of the front heat dissipation high-transparency assembly 3 through the supply pipe 12; one end of the discharge pipe 13 is connected with the discharge port 8, and the other end is connected with the inlet of the liquid storage tank 15, thereby forming a closed liquid circulation loop. The liquid storage tank 15 is filled with low-conductivity cooling liquid (such as a mixture of deionized water and ethylene glycol), and the cooling liquid flows through the containment chamber 6 in the circulation process, returns to the liquid storage tank 15 after absorbing the heat of the cover, and is cooled by heat exchange between the shell of the liquid storage tank 15 and the ambient air. The supply pipe 12 and the discharge pipe 13 are flexible pipes with a temperature resistance range of -40°C to 120°C, and quick connectors are used at the interfaces to ensure the sealing. A temperature sensor 19 is fixedly connected around the outer periphery of the top of the outer cover 4, the temperature sensor 19 is a digital temperature sensor, the sensing probe thereof avoids the direct light source area, and is electrically connected with the main board 18 through a lead wire, and is used to collect the surface temperature data of the cover in real time.

[0022] In the gas cooling embodiment (see Figure 2), the supply assembly 11 includes a gas filter 17, a supply pump 14, a supply pipe 12 and a discharge pipe 13. The gas filter 17 is a porous filter element structure, and the gas inlet thereof is connected with the air inlet of the supply pump 14 through a pipeline, for filtering dust and moisture in the ambient air entering the system; the supply pump 14 is a miniature axial flow fan, and the air inlet thereof is communicated with the supply port 7 through the supply pipe 12; the discharge pipe 13 is connected with the discharge port 8 at one end and is open to the outside at the other end, and the end of the discharge port 8 is directed towards the lower part of the inner cover 5, so that the discharged hot air flow flows along the rear side of the lamp body 9 or the surface of the heat dissipation fins 10, and the residual hot air flow is used for secondary cooling of the lamp body support or the heat dissipation fin area. The supply pipe 12 and the discharge pipe 13 are corrugated pipes made of TPU material, which have a certain flexibility to adapt to the assembly tolerance. Similarly, a temperature sensor 19 is fixed on the top outer periphery of the outer cover 4, for real-time monitoring of the cover temperature.

[0023] Regardless of the liquid or gas cooling mode, the supply assembly 11 further includes a control panel 1, a battery 16 and a main board 18. The control panel 1 is fixed on the side wall of the lamp body shell, and the surface thereof is provided with key positions electrically connected with the main board 18, including a rotary luminance knob and a press switch. The luminance knob outputs an analog signal to the main board 18 through a potentiometer, and the main board 18 adjusts the driving current of the lamp body 9 accordingly to realize stepless adjustment of the brightness; the switch is used for controlling the on-off of the power supply of the whole machine. The main board 18 is provided with a USB-C type charging socket 2, which can charge the built-in battery 16 when connected with an external power adapter. The battery 16 is a rechargeable lithium ion battery pack, and the positive and negative electrodes thereof are connected with the power management module of the main board 18 through wires. The output ends of the main board 18 are electrically connected with the LED driving circuit of the lamp body 9 and the motor driving circuit of the supply pump 14, respectively, to realize the cooperative power supply and control logic linkage of the lighting and cooling systems. In the gas cooling embodiment, a capacitive touch sensor is also embedded on the outer surface of the outer cover 4, and the sensing electrode thereof is arranged on the top non-optical area of the outer cover 4, and the signal output end thereof is connected with the touch detection module of the main board 18; when the user's finger touches the sensor, the main board 18 recognizes the capacitance change signal, and then triggers two actions: one is to send a start instruction to the lamp body 9 driving circuit to turn on the LED light source; the other is to send a strong cooling working instruction to the supply pump 14 to make it run at the maximum air volume, and the duration is 30 seconds or until the next touch is closed.

[0024] The actual operation process of the present application is as follows: when the lamp body 9 is turned on and in a high-power working state, part of the heat generated is transferred to the front heat dissipation high-transmittance component 3 through radiation and convection, and the other part is transferred to the side cover plate through conduction and dissipated by the heat dissipation fins 10. The temperature sensor 19 monitors the surface temperature of the outer cover body 4 in real time and transmits the data to the mainboard 18. The mainboard 18 is built-in with a microcontroller unit (MCU) and pre-stores a multi-stage temperature control strategy: when the detected temperature is in the first threshold interval (for example, 30-40°C), the pump 14 is supplied to run at low speed; when the temperature rises to the second threshold interval (40-50°C), the pump 14 is switched to medium speed; when the temperature reaches the third threshold interval (> 50°C), the pump 14 is supplied to run at full speed. At the same time, the user can adjust the brightness of the lamp body 9 through the luminosity knob of the control panel 1, and the mainboard 18 can be linked to adjust the light in high-temperature working conditions to reduce the power of the lamp body 9 to assist cooling. In the gas cooling mode, if the user touches the capacitive touch sensor, the lamp body 9 is immediately turned on, and the supply pump 14 is started simultaneously in the strong cooling mode. The exhaust gas is directed to the lower part of the inner cover body 5 through the exhaust port 8, further cooling the area of the heat dissipation fins 10. The whole system realizes the composite heat management path of "front active cooling + rear passive heat dissipation" in a compact structure, so that the junction temperature of the core light-emitting element of the lamp body 9 is maintained within a safe range in the full-power continuous working state, avoiding accelerated light decay or drive circuit failure.

[0025] The inner cover body 5 and the outer cover body 4 are made of optical-grade PMMA or optical glass material, and the visible light transmittance is not less than 92%. The thickness of the containment chamber 6 is 0.5-5 mm, which ensures that the cooling medium has sufficient flow cross-sectional area while maintaining the structural strength of the cover body. The inner diameter of the supply port 7 and the exhaust port 8 is 3-12 mm, which matches the outer diameter of the supply pipe 12 and the exhaust pipe 13. The interface adopts an O-ring sealing structure to prevent leakage of the cooling medium. The mainboard 18 is integrated with a power management chip, a motor drive chip and a communication interface, supports firmware upgrade to adjust the temperature control strategy, and is suitable for different use scenarios. The present application is suitable for high-power portable lamps such as handheld searchlights, tactical lighting equipment and outdoor work lamps, which solves the problem of insufficient heat dissipation while maintaining high optical efficiency and good human-machine interaction experience.

[0026] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not conflict, they should be considered within the scope of the present application. Those skilled in the art can make several modifications and improvements without departing from the concept of the present application, which are all within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A cooling structure for a lamp body, characterized in that: It includes a front-mounted heat dissipation high-transmittance component for covering the lamp body, the front-mounted heat dissipation high-transmittance component is connected to a supply component for providing cooling medium through a pipeline, and the front-mounted heat dissipation high-transmittance component is provided with a passage chamber for the flow of cooling medium.

2. The cooling structure for a lamp body as described in claim 1, characterized in that: The front-mounted heat dissipation high-transmittance component includes an inner cover with a central arch and an outer cover covering the inner cover. The shape of the outer cover corresponds to that of the inner cover. The outer cover and the inner cover are sealed together to form a passage chamber through which the cooling medium can flow. After the outer cover and the inner cover are closed, they also form supply ports and exhaust ports arranged at both ends of the passage chamber. The bottom of the inner cover is also provided with a side cover plate that extends downward. The side cover plate is made of opaque material.

3. The cooling structure for a lamp body as described in claim 2, characterized in that: The supply assembly includes a supply pump, a storage tank, a supply pipe, and a discharge pipe. The two ends of the supply pipe are connected to the supply port and the outlet of the supply pump, respectively. The two ends of the discharge pipe are connected to the discharge port and the inlet of the storage tank, respectively. The outlet of the storage tank is connected to the inlet of the supply pump through a pipe. A temperature sensor is wrapped around and fixedly connected to the top outer periphery of the outer cover.

4. A cooling structure for a lamp body as described in claim 2, characterized in that: The supply assembly includes a gas filter, a supply pump, a supply pipe, and a discharge pipe. The gas filter supply port is connected to the supply pump inlet. The two ends of the supply pipe are connected to the supply pump supply port and the supply outlet, respectively. The discharge pipe is connected to the discharge outlet. A temperature sensor is wrapped around and fixedly connected to the top outer periphery of the outer cover.

5. A cooling structure for a lamp body as described in claim 4, characterized in that: The end of the outlet faces downwards from the inner cover.

6. A cooling structure for a lamp body as described in claim 3, characterized in that: The power supply components also include a control panel, a battery, and a mainboard. The control panel has buttons that connect to the mainboard and includes a light intensity knob and a switch. The mainboard has a charging port and is electrically connected to the battery, the power supply pump, and the lamp body.

7. A cooling structure for a lamp body as described in claim 1, characterized in that: The front-mounted heat dissipation high-transmittance component is equipped with a temperature sensor.

8. A cooling structure for a lamp body as described in claim 2, characterized in that: It also includes heat dissipation fins, which are fixed to the bottom of the side cover of the inner cover to form a central cavity for placing the lamp body.

9. A cooling structure for a lamp body as described in claim 4, characterized in that: The supply components also include a control panel, a battery, and a motherboard. The control panel has buttons that connect to the motherboard and includes a light intensity knob and a switch. The motherboard has a charging port and is electrically connected to the battery, the supply pump, and the lamp body. A capacitive touch sensor is also installed on the outer casing.

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