Water cooling device for efficient cooling LED of letterpress printing machine

Abstract

The utility model discloses a water cooling device for efficiently cooling an LED of a letterpress printing machine, which relates to the technical field of LED cooling of printing machines and comprises a shell, a circuit board fixedly connected to the lower side of the shell, lamp beads fixedly connected to the lower surface of the circuit board, and a cooling component mounted in the shell and comprising a cooling fin I fixedly mounted in the shell, a main cooling pipeline is arranged in the shell in a penetrating mode, a connecting shell is detachably connected to the shell, second cooling fins are fixedly connected to the interior of the connecting shell, the second cooling fins abut against the first cooling fins, an expansion cooling pipeline is arranged in the second cooling fins in a penetrating mode, and a cooling fan is fixedly connected to the top of the connecting shell; the outer wall of the cooling fan is covered with a dust cover, a filter plate is slidably connected to the position, close to the lower side of the cooling fan, in the connecting shell, and air outlets are distributed in the side wall, located below the filter plate, of the connecting shell. According to the utility model, a double heat dissipation guarantee mechanism with water cooling as a main part and air cooling as an auxiliary part is formed, and heat generated by the lamp beads can be quickly and continuously led out.

Description

Technical Field

[0001] This utility model relates to the field of LED cooling technology for printing presses, and in particular to a water-cooling device for high-efficiency cooling of LEDs in letterpress printing presses. Background Technology

[0002] Letterpress printing presses are key pieces of equipment in the modern printing industry. In recent years, to improve ink curing speed, reduce energy consumption, and meet environmental protection requirements, high-power ultraviolet light-emitting diodes (UV-LEDs) have gradually replaced traditional mercury lamps, becoming the mainstream curing technology. When UV-LEDs are working, their electro-optical conversion efficiency is typically only 30%–40%, with most of the remaining electrical energy being converted into heat. If this heat cannot be dissipated effectively and in a timely manner, the LED chip temperature will rise sharply, causing not only light power attenuation and wavelength drift, affecting print quality, but also severely shortening the lifespan of the LED chips. Therefore, designing an efficient and reliable cooling system is crucial for ensuring the stable operation of letterpress printing presses.

[0003] Currently, existing technologies for heat dissipation of high-power LEDs mainly employ single-mode heat dissipation solutions. One such solution is air cooling, which involves mounting large-area heat sinks on the back of the LED substrate and using a fan to force convection heat transfer. The underlying principle is to utilize metal heat sinks to increase the contact area with the air, and then use a fan to accelerate airflow to remove the heat generated by the LED.

[0004] However, as letterpress printing presses evolve towards higher speeds and precision, the power density requirements for UV-LED light sources are also increasing, resulting in enormous instantaneous heat generation. Under these circumstances, the limitations of the aforementioned single-mode heat dissipation technologies become apparent. Simple air-cooling systems, limited by heat sink size and fan efficiency, are increasingly unable to meet the heat dissipation needs of multi-kilowatt LED modules, easily leading to heat accumulation and making it impossible to control the LED chip temperature within the ideal range. Therefore, in long-term, high-load continuous printing operations, existing heat dissipation devices often suffer from insufficient heat dissipation capacity, causing LED overheating, unstable photocuring effects, and accelerated aging and damage of the LED chips, failing to guarantee the long-term stable operation of the printing press. Therefore, a water-cooling device for efficiently cooling LEDs in letterpress printing presses is proposed to solve these problems. Summary of the Invention

[0005] To overcome the above shortcomings, this utility model provides a water-cooling device for high-efficiency cooling of LEDs in letterpress printing machines. It aims to improve the problem that existing heat dissipation devices often cause LED overheating due to insufficient heat dissipation capacity, resulting in unstable photocuring effect, accelerated aging and damage of LED beads, and failure to guarantee the long-term stable operation of the printing machine.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a water-cooling device for high-efficiency cooling LEDs in letterpress printing machines, comprising a housing, a circuit board fixedly connected to the lower side of the housing, LED beads fixedly connected to the lower surface of the circuit board, and a cooling component installed inside the housing; the cooling component includes a heat sink one fixedly installed inside the housing, a main cooling pipe running through the heat sink one, a connecting shell detachably connected to the housing, a heat sink two fixedly connected inside the connecting shell, the heat sink two abutting against the heat sink one, an extended cooling pipe running through the heat sink two, one end of the main cooling pipe communicating with one end of the extended cooling pipe via a connecting component, and a cooling fan fixedly connected to the top of the connecting shell; a dust cover is provided on the outer wall of the cooling fan, a filter plate is slidably connected inside the connecting shell near the lower side of the cooling fan, and air outlets are distributed on the side wall of the connecting shell below the filter plate.

[0007] As a further description of the above technical solution: the side wall of the connecting shell is provided with an opening groove, the filter plate is removably installed in the connecting shell through the opening groove, a rotating pin is rotatably connected to the outer wall of the connecting shell near the filter plate, and a buckle is provided on the outer wall of the filter plate, the rotating pin is engaged and fixed with the buckle.

[0008] As a further description of the above technical solution: the connecting assembly includes a female connector located at the end of the main cooling pipe and a male connector located at the end of the extended cooling pipe. The male connector is inserted into the female connector, and a sealing ring is provided between the two.

[0009] As a further description of the above technical solution: multiple connecting posts are fixedly connected around the top of the housing, and the side wall of each connecting post is provided with an inwardly recessed annular limiting groove. The connecting shell is provided with multiple connecting sleeves corresponding to the connecting posts, and the connecting sleeves are provided with snap-fit ​​components that engage with the upper limiting groove of the connecting posts.

[0010] As a further description of the above technical solution: the snap-fit ​​assembly includes a sliding rod that passes through the connecting sleeve, a hinge seat is fixedly connected to the lower end of the sliding rod, rotating rods are symmetrically rotatably connected to both sides of the hinge seat, a snap-fit ​​plate is rotatably connected to the end of the rotating rod away from the hinge seat, the middle part of the snap-fit ​​plate is rotatably connected to the inner wall of the connecting sleeve through a rotating shaft, and a snap-fit ​​block is provided on the inner side of the lower end of the snap-fit ​​plate that matches the upper limit groove of the connecting post.

[0011] As a further description of the above technical solution: a connecting plate is fixedly connected to the bottom of the connecting sleeve near the locking plate, and a spring is connected between the locking plate and the connecting plate. Under normal conditions, the spring pushes the locking block of the locking plate to press the limiting groove inward.

[0012] This utility model has the following beneficial effects:

[0013] 1. In this utility model, the heat generated by the LED beads is first absorbed by the heat sink 1, which is in close contact with the circuit board, and then carried away by the circulating water through the main cooling pipe inside. At the same time, the heat sink 2, which is in contact with it, and its internal extended cooling pipe further expand the contact area for water cooling. The cooling fan located above provides forced air cooling to the two heat sinks, forming a dual heat dissipation guarantee mechanism with water cooling as the main method and air cooling as the auxiliary method. This collaborative working mode of water cooling as the main method and air cooling as the auxiliary method can quickly and continuously dissipate the heat generated by the LED beads, ensuring the stability of the letterpress printing machine under long-term high-load operation and the lifespan of the LEDs.

[0014] 2. The filter plate can be quickly removed through the horizontal pull-out opening. Combined with the one-handed rotation locking operation of the rotating pin and buckle, the filter screen can be quickly disassembled and cleaned, effectively avoiding the decrease in air-cooling efficiency caused by dust accumulation.

[0015] 3. In this utility model, the connecting shell for installing the cooling fan and the second heat sink can be easily snapped and separated from the main shell through a set of ingenious spring locking mechanisms; when separated, the male and female connectors between the main cooling pipe and the extended cooling pipe can be quickly inserted and removed, and the sealing ring can effectively prevent coolant leakage, thereby greatly simplifying the cleaning and maintenance of the heat sink, cooling fan and filter, and significantly shortening downtime. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the water-cooling device for the high-efficiency cooling LED of the letterpress printing machine proposed in this utility model.

[0017] Figure 2 This is a schematic diagram of the LED bead structure of the water-cooling device for the high-efficiency cooling LED of the letterpress printing machine proposed in this utility model.

[0018] Figure 3 This is a schematic diagram of the extended cooling pipeline of the water-cooling device for the high-efficiency cooling LED of the letterpress printing machine proposed in this utility model.

[0019] Figure 4 This is a schematic diagram of the filter plate portion of the water-cooling device for the high-efficiency cooling LED of the letterpress printing machine proposed in this utility model.

[0020] Figure 5 for Figure 4 Enlarged view of point A in the image.

[0021] Figure 6 This is a schematic diagram of the connection female part of the water-cooling device for the high-efficiency cooling LED of the letterpress printing machine proposed in this utility model.

[0022] Figure 7 for Figure 6 Enlarged view of point B in the image.

[0023] Legend:

[0024] 1. Housing; 2. Circuit board; 3. LED bead; 4. Heat sink one; 5. Main cooling pipe; 6. Heat sink two; 7. Extended cooling pipe; 8. Female connector; 9. Male connector; 10. Sealing ring; 11. Connecting shell; 12. Cooling fan; 13. Dust cover; 14. Filter plate; 15. Rotating pin; 16. Buckle; 17. Connecting post; 18. Connecting sleeve; 19. Sliding rod; 20. Hinge seat; 21. Rotating rod; 22. Locking plate; 23. Connecting plate; 24. Spring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Reference Figures 1-7 An embodiment of this utility model provides a water-cooling device for high-efficiency cooling of LEDs in letterpress printing machines, comprising a housing 1, a circuit board 2 for supporting electronic components and conducting heat is fixedly connected to the lower side of the inner wall of the housing 1, and an LED bead 3 is fixedly connected to the lower surface of the circuit board 2 to provide a light source; in order to effectively reduce the heat generated by the LEDs during operation, a cooling component is installed on the inner wall of the housing 1.

[0027] The cooling component includes a heat sink 4, which is fixedly connected inside the housing 1. It effectively absorbs and dissipates the heat generated by the LED. A main cooling pipe 5 runs through the heat sink 4, providing a channel for the flow of coolant to remove heat. A connecting shell 11 is detachably connected to the housing 1 for easy replacement and maintenance. A second heat sink 6 is fixedly connected inside the connecting shell 11, forming a larger thermal contact surface with the first heat sink 4 to further improve heat dissipation efficiency. The second heat sink 6 and the first heat sink abut against each other, ensuring effective heat conduction through direct contact. An extended cooling pipe 7 runs through the second heat sink 6, and the two are tightly connected by a connecting component to form a continuous flow of coolant, ensuring rapid cooling. The connecting assembly includes a female connector 8 fixedly connected to one end of the main cooling pipe 5, and a male connector 9 fixedly connected to one end of the extended cooling pipe 7 for easy connection to the main cooling pipe 5. The male connector 9 is inserted into the inner wall of the female connector 8 to form a stable physical connection. A sealing ring 10 is provided between the main cooling pipe 5 and the extended cooling pipe 7 to prevent coolant leakage and improve the sealing performance of the entire device.

[0028] A cooling fan 12 is fixedly connected to the top of the connecting shell 11. The cooling fan 12 provides air cooling, forcibly cooling the heat sink and improving heat dissipation efficiency. A dust cover 13 is provided on the outer wall of the cooling fan 12 to protect it from external impurities and extend its service life. A filter plate 14 is slidably connected inside the connecting shell 11 near the lower side of the cooling fan 12. The filter plate 14 can effectively remove dust and impurities from the air to keep the cooling fan 12 and the heat dissipation system clean. Air outlets are distributed on the side wall of the connecting shell below the filter plate.

[0029] Specifically, by combining water cooling and air cooling, the heat dissipation capacity of LED beads 3 is effectively improved, ensuring that they maintain a stable temperature during long-term high-load operation, extending their service life, and improving the overall working efficiency of letterpress printing machines.

[0030] Reference Figures 1-7 A rotating pin 15 is rotatably connected to the outer wall of the connecting shell 11 near the filter plate 14, which is used to realize the quick disassembly of the filter plate 14 for easy cleaning and replacement; the rotating pin 15 is engaged inside the buckle 16 near the outer wall of the filter plate 14 to ensure the stability and sealing of the filter plate 14 during operation.

[0031] Multiple connecting posts 17 are fixedly connected around the top perimeter of the housing 1. These connecting posts 17 serve as fixing and guiding structures, ensuring the stable installation of the housing 11. The housing 11 is provided with multiple connecting sleeves 18 corresponding to the connecting posts. The connecting sleeves 18 provide structural support for the entire device, offering good stability. A sliding rod 19 is slidably connected inside the connecting sleeve 18. The design of the sliding rod 19 allows for smooth sliding and positioning when disassembly is required, ensuring ease of operation. A hinge seat 20 is fixedly connected to the lower end of the sliding rod 19, providing support for rotational movement. Rotating rods 21 are symmetrically rotatably connected to both sides of the hinge seat 20. The rotating rods 21 can be adjusted at multiple angles to facilitate equipment adaptation under different operating conditions. A locking plate 22 is rotatably connected to the other end of the rotating rod 21, used to cooperate with the connecting posts 17 for fixation. The middle part of the locking plate 22 is rotatably connected to the inner wall of the connecting sleeve 18 via a rotating shaft. A connecting plate 23 is fixedly connected to the bottom surface of the connecting sleeve 18 near the locking plate 22. A spring 24 is connected between the locking plate 22 and the connecting plate 23. Under normal conditions, the spring 24 pushes the locking block of the locking plate 22 to press the limiting groove inward. The locking block on the locking plate 22 is engaged in the limiting groove on the connecting column 17. The spring 24 provides sufficient constraint to the locking plate 22 to prevent it from loosening in the working state, ensuring the compactness and reliability of the entire structure.

[0032] Specifically, the flexible connections and resilient design make maintenance and cleaning of the device more convenient. Meanwhile, the robust locking structure ensures safety and reliability during use, guaranteeing the continuous and effective operation of the LED heat dissipation system, thereby improving the overall performance of the device.

[0033] Working principle: When the water cooling device is needed, firstly, the heat generated by the LED beads 3 inside the housing 1 is quickly conducted to the circuit board 2 and heat sink 4 below it; external cooling water circulates inside the heat sink 4 through the main cooling pipe 5, efficiently removing the core heat. At the same time, the heat sink 6 installed in the detachable connecting housing 11 is in close contact with the heat sink 4, and its internal extended cooling pipe 7 is connected to the main cooling pipe 5 through the male connector 9 and the female connector 8, forming a series water circuit, further increasing the water cooling heat dissipation area; as a second layer of protection, after the cooling fan 12 at the top of the connecting housing 11 is started, it will draw in air from the outside, purify it through the filter plate 14, and force-cool the heat sink 4 and the heat sink 6, thereby achieving synergistic cooling with water cooling as the main method and air cooling as the auxiliary method.

[0034] Secondly, during normal operation, the spring 24 pushes the locking plate 22 into the limiting groove of the connecting post 17, firmly fixing the connecting shell 11. When maintenance is required, the operator only needs to pull the sliding rod 19 outward. Through the linkage of the hinge seat 20 and the rotating rod 21, the locking plate 22 can be dislodged from the groove, thus easily removing the entire connecting shell 11. During disassembly, the male connector 9 and the female connector 8 of the water circuit are separated, and the sealing ring 10 effectively prevents coolant leakage. In addition, the filter plate 14 inside the connecting shell 11 can also be quickly disassembled and assembled through the rotating pin 15 and the buckle 16, thus facilitating daily cleaning and maintenance.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A water-cooling device for high-efficiency cooling LEDs in letterpress printing machines, comprising a housing (1), characterized in that: A circuit board (2) is fixedly connected to the lower side of the housing (1), and an LED bead (3) is fixedly connected to the lower surface of the circuit board (2). A cooling component is installed inside the housing (1). The cooling component includes a heat sink 1 (4) fixedly installed inside the housing (1), and a main cooling pipe (5) is provided through the heat sink 1 (4). A connecting shell (11) is detachably connected to the housing (1), and a heat sink 2 (6) is fixedly connected inside the connecting shell (11). The heat sink 2 (6) abuts against the heat sink 1 (4). An extended cooling pipe (7) is provided inside the heat sink (6). One end of the main cooling pipe (5) is connected to one end of the extended cooling pipe (7) through a connecting component. A cooling fan (12) is fixedly connected to the top of the connecting shell (11). A dust cover (13) is provided on the outer wall of the cooling fan (12). A filter plate (14) is slidably connected inside the connecting shell (11) near the lower side of the cooling fan (12). Air outlets are distributed on the side wall of the connecting shell (11) below the filter plate (14).

2. The water-cooling device for high-efficiency cooling LEDs in letterpress printing machines according to claim 1, characterized in that: The side wall of the connecting shell (11) is provided with an opening groove. The filter plate (14) is installed in the connecting shell (11) through the opening groove. A rotating pin (15) is rotatably connected to the outer wall of the connecting shell (11) near the filter plate (14). A buckle (16) is provided on the outer wall of the filter plate (14). The rotating pin (15) is engaged and fixed with the buckle (16).

3. The water-cooling device for high-efficiency cooling LEDs in letterpress printing machines according to claim 1, characterized in that: The connection assembly includes a female connector (8) at the end of the main cooling pipe (5) and a male connector (9) at the end of the extended cooling pipe (7). The male connector (9) is inserted into the female connector (8), and a sealing ring (10) is provided between them.

4. The water-cooling device for high-efficiency cooling LEDs in letterpress printing machines according to claim 1, characterized in that: The top of the housing (1) is provided with a plurality of connecting posts (17) fixedly connected around the perimeter. The side wall of the connecting post (17) is provided with an inwardly recessed annular limiting groove. The connecting shell (11) is provided with a plurality of connecting sleeves (18) corresponding to the connecting posts (17). The connecting sleeves (18) are provided with a snap-fit ​​assembly that engages with the upper limiting groove of the connecting post (17).

5. The water-cooling device for high-efficiency cooling LEDs in letterpress printing machines according to claim 4, characterized in that: The snap-fit ​​assembly includes a sliding rod (19) that passes through the connecting sleeve (18). The lower end of the sliding rod (19) is fixedly connected to a hinge seat (20). Rotating rods (21) are symmetrically rotatably connected to both sides of the hinge seat (20). A locking plate (22) is rotatably connected to one end of the rotating rod (21) away from the hinge seat (20). The middle part of the locking plate (22) is rotatably connected to the inner wall of the connecting sleeve (18) through a rotating shaft. A locking block matching the upper limit groove of the connecting post (17) is provided on the inner side of the lower end of the locking plate (22).

6. The water-cooling device for high-efficiency cooling LEDs in letterpress printing machines according to claim 5, characterized in that: A connecting plate (23) is fixedly connected to the bottom of the connecting sleeve (18) near the side of the locking plate (22). A spring (24) is connected between the locking plate (22) and the connecting plate (23). Under normal conditions, the spring (24) pushes the locking block of the locking plate (22) to press the limiting groove inward.

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