A fluorescent endoscope light source heat dissipation structure

Abstract

The utility model discloses a fluorescent endoscope light source heat dissipation structure, including light source module, heat dissipation module and water pump, the front of light source module is illuminated area, and the back is configured heat dissipation module, be equipped with the heat exchange cavity in heat dissipation module, be equipped with the heat dissipation fin area in the heat exchange cavity, water pump includes water tank and is used for driving fluid's pump head, the heat exchange cavity is linked together with water tank, and common constitutes closed type cooling circulation loop, the utility model discloses the design of several character shape guide flow channel, water diversion, then through heat dissipation fin area forms turbulent flow, again backflow to the water outlet of upper cover, realizes the heat transfer of convection, accelerates the heat dissipation speed, has solved the problem of the insufficient heat dissipation effect in the prior art, has improved the working environment temperature of light source, has improved the stability of light source operation and the service life significantly.

Description

Technical Field

[0001] This utility model relates to the technical field of endoscopes, and in particular to the heat dissipation structure of a fluorescent endoscope light source. Background Technology

[0002] Fluorescent cold light sources are commonly used to provide illumination for endoscopic examinations. They combine traditional white light endoscopy with fluorescence imaging technology. By exciting tissue with infrared light wavelengths, fluorescent substances (such as indocyanine green ICG) are activated to emit fluorescent signals. The system converts the captured fluorescent signals into digital images and overlays them with white light images to display key anatomical structures such as blood vessels, lymph nodes, or tumor boundaries in real time, significantly improving surgical accuracy and safety.

[0003] The fluorescent cold light source module includes a white light module, a near-infrared light module, a beam guide, and a dichroic mirror. By setting a 45° dichroic mirror at the intersection of the white light path and the fluorescent light path, the light from the white light module passes through the dichroic mirror and is transmitted to the output of the beam guide. The light from the near-infrared light module is reflected by the dichroic mirror and is also transmitted to the output of the beam guide. The white light and near-infrared light are merged to form a combined light beam, which is then transmitted to the endoscope through the beam guide.

[0004] The working principle of a fluorescent light source is as follows: when working, it drives an LED chip. The operation usually lasts for more than 1 hour, during which a lot of heat is generated. The internal temperature of the LED driver chip rises, resulting in a significant decrease in luminous efficiency and a shortened lifespan of the light source.

[0005] Conventional heat dissipation uses air cooling, which involves installing heat-conducting fins and fans on the back of the LED beads. For example, patent CN219270860U discloses a heat dissipation system for a fluorescent endoscope cold light source, which includes two internal suction fans and one external exhaust fan. Heat sinks are installed on the back of the white light and fluorescent LEDs, respectively, with the fans in close contact with the heat sinks. When the LEDs are working, the heat from the light source module is conducted to the heat sink, and then blown by the two fans along the heat dissipation airflow path to the external exhaust fan, which carries away the heat from the heat sink, thereby achieving heat dissipation of the light source module. However, this method of cooling by using fan convection to dissipate cold air is difficult to meet the heat dissipation requirements of high-power light sources. Summary of the Invention

[0006] The purpose of this invention is to solve the problems in the prior art by proposing a heat dissipation structure for a fluorescent endoscope light source, which can solve the above problems.

[0007] To achieve the above objectives, this utility model proposes a heat dissipation structure for a fluorescent endoscope light source, including a light source module, a heat dissipation module, and a water pump. The front of the light source module is set as the illumination area, and the back is configured with the heat dissipation module. The heat dissipation module has a heat exchange cavity, and the heat exchange cavity has a heat dissipation fin area. The water pump includes a water tank and a pump head for driving fluid. The heat exchange cavity is connected to the water tank, together forming a closed cooling circulation loop.

[0008] The water pump is used to provide power to the heat dissipation module. It integrates the water tank and pump head into one unit, has a simple structure, and is easy to install.

[0009] Preferably, the heat dissipation module includes an upper cover and a base, with a middle mounting plate between the upper cover and the base, a heat exchange chamber between the base and the middle mounting plate, and a liquid inlet chamber and a manifold chamber that are isolated from each other between the upper cover and the middle mounting plate. The liquid inlet chamber is connected to a main inlet, and the manifold chamber is connected to a main outlet. The middle mounting plate has a water inlet and a water outlet, with the water inlet connecting the liquid inlet chamber and the heat exchange chamber, and the water outlet connecting the manifold chamber and the heat exchange chamber.

[0010] Preferably, the heat dissipation fin area is fixed on the base, and the heat dissipation fin area is provided with a plurality of heat dissipation channels. The water inlet and water outlet are located on both sides of the heat dissipation channels, and the heat dissipation fin area is provided with a U-shaped channel around its periphery.

[0011] Preferably, the water in the water tank flows sequentially through the main inlet, liquid inlet chamber, water inlet, heat exchange chamber, water outlet, manifold chamber, and main outlet.

[0012] Preferably, the cross-sectional area of ​​the inlet is larger than that of the outlet.

[0013] Preferably, the liquid inlet chamber is provided with a U-shaped guide channel, and the water inlet includes a first inlet and a second inlet, the sum of the cross-sectional areas of the first inlet and the second inlet is S1, and the cross-sectional area of ​​the water outlet is S2, where S1>S2.

[0014] Preferably, the middle mounting plate is provided with a groove, the base is embedded in the groove, and the screw passes through the middle mounting plate to fix the top cover to the base. The outer edge of the middle mounting plate is provided with a mounting hole, which is connected to the light source module by a screw. The liquid inlet chamber is sealed to the middle mounting plate by a first sealing ring, the manifold chamber is sealed to the middle mounting plate by a second sealing ring, and the heat exchange chamber is sealed to the middle mounting plate by a third sealing ring.

[0015] Preferably, the light source module includes a white light module and a fluorescent module, with two independent heat dissipation modules respectively configured on the back of the white light module and the fluorescent module. The white light module is an LED that emits visible light, and the fluorescent module is an LED that emits near-infrared light.

[0016] Preferably, the base is attached to the chip on the back of the light source module, and the base is made of a thermally conductive material.

[0017] Preferably, both the light source module and the water pump are installed at the bottom of the chassis.

[0018] The beneficial effects of this utility model are: by setting a water-cooled heat dissipation structure on the back of the LED light and dissipating heat through liquid retention at the bottom, this utility model effectively improves heat dissipation efficiency; This utility model features a zigzag-shaped guide channel that diverts water inlet, which then forms turbulence in the heat dissipation fin area before flowing back to the outlet of the top cover. This achieves convective heat transfer, accelerates heat dissipation, solves the problem of insufficient heat dissipation in existing technologies, improves the operating temperature of the light source, and significantly enhances the stability and lifespan of the light source. This utility model modularizes the entire heat dissipation structure. The heat dissipation module integrates the top cover, middle mounting plate, and base into one unit. The heat dissipation module is fastened to the light source module with screws. It has a simple structure, occupies little space, is easy to install, and has reliable heat transfer.

[0019] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the fluorescent cold light source main unit; Figure 2 This is a diagram of the heat dissipation module assembly; Figure 3 It was a heat dissipation module explosion. Figure 1 ; Figure 4 It was a heat dissipation module explosion. Figure 2 ; Figure 5 This is a cross-sectional view of the heat dissipation module; Figure 6 This is a schematic diagram of liquid flow.

[0021] In the diagram: 1. Chassis; 2. Light source module; 3. Heat dissipation module; 4. Water pump; 31. Top cover; 32. Middle mounting plate; 33. Base; 34. First sealing ring; 35. Second sealing ring; 36. Third sealing ring; 311. Main inlet; 312. Main outlet; 313. Manifold; 321. First inlet; 322. Second inlet; 323. Mounting plate outlet. Detailed Implementation

[0022] See Figures 1 to 6 A heat dissipation structure for a fluorescent endoscope light source includes a light source module 2, a heat dissipation module 3, and a water pump 4. The front of the light source module 2 is set as an illumination area, and the back is configured with the heat dissipation module 3. The heat dissipation module 3 has a heat exchange cavity 5, and the heat exchange cavity 5 has a heat dissipation fin area. The water pump 4 includes a water tank 41 and a pump head 42 for driving fluid. The heat exchange cavity 5 is connected to the water tank 41, and together they form a closed cooling circulation loop.

[0023] The heat dissipation module 3 includes an upper cover 31 and a base 33. A middle mounting plate 32 is provided between the upper cover 31 and the base 33. A heat exchange chamber 5 is provided between the base 33 and the middle mounting plate 32. An inlet chamber 6 and a manifold chamber 7 are provided between the upper cover 31 and the middle mounting plate 32, which are isolated from each other. The inlet chamber 6 is connected to a main inlet 311, and the manifold chamber 7 is connected to a main outlet 312. The middle mounting plate 32 has a water inlet and a water outlet 323. The water inlet connects the inlet chamber 6 and the heat exchange chamber 5, and the water outlet 323 connects the manifold chamber 7 and the heat exchange chamber 5.

[0024] The heat dissipation fin area 8 is fixed on the base 33. The heat dissipation fin area 8 is provided with a plurality of heat dissipation channels. The water inlet and water outlet 323 are located on both sides of the heat dissipation channels. The heat dissipation fin area is provided with a U-shaped channel around its periphery.

[0025] The liquid in the heat dissipation fin area increases the degree of mixing between the fluid and the fin surface, achieving convective heat transfer and removing heat.

[0026] The water in the water tank 41 flows sequentially through the main inlet 311, the liquid inlet chamber 6, the water inlet, the heat exchange chamber 5, the water outlet 323, the confluence chamber 7, and the main outlet 312.

[0027] The cross-sectional area of ​​the inlet is larger than that of the outlet 323.

[0028] The liquid inlet chamber 6 is provided with a U-shaped guide channel. The water inlet includes a first inlet 321 and a second inlet 322. The sum of the cross-sectional areas of the first inlet 321 and the second inlet 322 is S1. The cross-sectional area of ​​the water outlet 323 is S2, and S1>S2.

[0029] The cross-sectional area design can create positive pressure, accelerate the liquid flow rate, and thus improve heat dissipation efficiency.

[0030] The zigzag flow channel divides the liquid, and the divided liquid passes through the first inlet 321 and the second inlet 322 of the middle mounting plate 32 and enters the heat exchange chamber 5 of the lower layer. The liquid shuttles through the heat dissipation fin area 8, making full contact with each fin, forming turbulence, carrying away the heat conducted from the light source to the base, and then flows back to the confluence chamber of the upper cover 31 along the zigzag flow channel around the fin area through the mounting plate outlet 323 of the middle mounting plate 32, thereby achieving efficient heat dissipation.

[0031] The mounting plate 32 has a groove, and the base 33 is embedded in the groove. Screws pass through the mounting plate 32 to fix the top cover 31 to the base 33. The outer edge of the mounting plate 32 has a mounting hole, which is connected to the light source module 2 by screws. The liquid inlet chamber 6 is sealed to the mounting plate 32 by the first sealing ring 34. The manifold 7 is sealed to the mounting plate 32 by the second sealing ring 35. The heat exchange chamber 5 is sealed to the mounting plate 32 by the third sealing ring 36 to prevent liquid leakage.

[0032] The light source module 2 includes a white light module and a fluorescent module. Two independent heat dissipation modules 3 are respectively configured on the back of the white light module and the fluorescent module. The white light module is an LED that emits visible light, and the fluorescent module is an LED that emits near-infrared light.

[0033] The base 33 is attached to the chip on the back of the light source module 2, and the base 33 is made of thermally conductive material.

[0034] Thermal grease can be applied between the base 33 and the LED chip to better conduct heat. The base 33 is made of a material with high thermal conductivity, such as copper or pure aluminum.

[0035] Both the light source module 2 and the water pump 4 are installed at the bottom inside the chassis 1.

[0036] When the light source module operates for an extended period, heat is conducted from the LED driver chip to the base. Simultaneously, the control system activates the water pump, which drives the liquid to the main inlet of the heat dissipation module, into the upper liquid inlet chamber. The Z-shaped flow channel diverts the liquid, which then passes through the first and second inlets of the middle mounting plate and enters the lower heat exchange chamber. The liquid flows through the fin area, making full contact with each fin, creating turbulence, and carrying away the heat conducted from the light source to the base. It then flows back along the U-shaped flow channel around the fin area, through the mounting plate outlet of the middle mounting plate, and back to the confluence chamber of the upper cover, thus achieving efficient heat dissipation.

[0037] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A heat dissipation structure for a fluorescent endoscope light source, characterized in that: The light source module (2), heat dissipation module (3), and water pump (4) are included. The front of the light source module (2) is set as the lighting area, and the back is configured with heat dissipation module (3). The heat dissipation module (3) has a heat exchange chamber (5) and a heat dissipation fin area (8) in the heat exchange chamber (5). The water pump (4) includes a water tank (41) and a pump head (42) for driving fluid. The heat exchange chamber (5) is connected to the water tank (41) to form a closed cooling loop.

2. The heat dissipation structure for the fluorescent endoscope light source as described in claim 1, characterized in that: The heat dissipation module (3) includes an upper cover (31) and a base (33). A middle mounting plate (32) is provided between the upper cover (31) and the base (33). A heat exchange chamber (5) is provided between the base (33) and the middle mounting plate (32). A liquid inlet chamber (6) and a manifold chamber (7) are provided between the upper cover (31) and the middle mounting plate (32), which are isolated from each other. The liquid inlet chamber (6) is connected to a main inlet (311), and the manifold chamber (7) is connected to a main outlet (312). A water inlet and a water outlet (323) are provided on the middle mounting plate (32). The water inlet connects the liquid inlet chamber (6) and the heat exchange chamber (5), and the water outlet (323) connects the manifold chamber (7) and the heat exchange chamber (5).

3. The heat dissipation structure for the fluorescent endoscope light source as described in claim 2, characterized in that: The heat dissipation fin area (8) is fixed on the base (33). The heat dissipation fin area (8) is provided with several heat dissipation channels. The water inlet and water outlet (323) are located on both sides of the heat dissipation channels. The heat dissipation fin area (8) is provided with a U-shaped channel (81) around its periphery.

4. The heat dissipation structure for the fluorescent endoscope light source as described in claim 2, characterized in that: The water in the water tank (41) flows sequentially through the main inlet (311), liquid inlet chamber (6), water inlet, heat exchange chamber (5), water outlet (323), confluence chamber (7) and main outlet (312).

5. The heat dissipation structure for the fluorescent endoscope light source as described in claim 2, characterized in that: The cross-sectional area of ​​the inlet is larger than that of the outlet (323).

6. The heat dissipation structure for the fluorescent endoscope light source as described in claim 5, characterized in that: The liquid inlet chamber (6) is provided with a U-shaped guide channel. The water inlet includes a first inlet (321) and a second inlet (322). The sum of the cross-sectional areas of the first inlet (321) and the second inlet (322) is S1, and the cross-sectional area of ​​the water outlet (323) is S2, where S1>S2.

7. The heat dissipation structure for the fluorescent endoscope light source as described in claim 2, characterized in that: The mounting plate (32) has a groove, and the base (33) is embedded in the groove. The screw passes through the mounting plate (32) to fix the top cover (31) and the base (33). The mounting plate (32) has a mounting hole on its outer edge, and the mounting hole is connected to the light source module (2) by screws. The liquid inlet chamber (6) is sealed to the mounting plate (32) by the first sealing ring (34), the manifold chamber (7) is sealed to the mounting plate (32) by the second sealing ring (35), and the heat exchange chamber (5) is sealed to the mounting plate (32) by the third sealing ring (36).

8. The heat dissipation structure for the fluorescent endoscope light source as described in claim 1, characterized in that: The light source module (2) includes a white light module and a fluorescent module. Two independent heat dissipation modules (3) are respectively configured on the back of the white light module and the fluorescent module. The white light module is an LED lamp that emits visible light, and the fluorescent module is an LED lamp that emits near-infrared light.

9. The heat dissipation structure for the fluorescent endoscope light source as described in claim 2, characterized in that: The base (33) is attached to the chip on the back of the light source module (2), and the base (33) is made of thermally conductive material.

10. The heat dissipation structure for the fluorescent endoscope light source as described in claim 1, characterized in that: The light source module (2) and the water pump (4) are both installed at the bottom of the chassis (1).

Images