CN107477544A - Intelligent control's UV-LED photocuring device's cooling system - Google Patents

Abstract

The present invention discloses an air cooling system for an intelligently controlled UV-LED light curing device, including a refrigeration unit, a housing, a heat sink, an LED lamp board, a light-transmitting plate, an end cover, and a control center. The system adopts an air-cooling cooling method, and absorbs the heat generated by the LED lamp board by injecting cold air into the cooling chamber. A guide plate with a certain inclination angle is designed based on the characteristics of air cooling to guide the cold air to always flow downward, increase the contact area between the cold air and the heat sink, and extend the contact time. The surface temperature of the LED lamp board is detected by a temperature sensor, and compared with the set threshold, and the opening and closing of the system is automatically controlled to realize intelligent control of the system. The cooling system of the present invention fills the gap in air-cooling systems on the market, has high heat dissipation efficiency, and can ensure that the LED lamp continues to work steadily.

Description

A cooling system of an intelligently controlled UV-LED light curing device

technical field

The invention belongs to the technical field of printing equipment, and relates to an air cooling system of an intelligently controlled UV-LED light curing device.

Background technique

UV curing technology refers to that under the irradiation of ultraviolet light, the polymer unsaturated bonds in the ink system are opened under the action of photosensitizers, which triggers the polymerization and crosslinking of active monomers or oligomers in the system. Thus, the system changes from a liquid state to a solid network structure in an instant and solidifies. The UV light curing device accelerates the curing speed of the light-curable ink. Under the premise of ensuring the same type of ink, the main reason affecting its curing speed is the difference in the light intensity of the light source.

At present, most light curing equipment on the market use mercury lamps as the light source. With the development of technology, LED lights are gradually used in light curing equipment due to their advantages of energy saving, fast start-up speed, and high light intensity. However, the photoelectric conversion rate of LED lights is not high, usually only 20%-30%. Most of the electric energy is converted into heat energy during use, which not only wastes energy, but also produces a large amount of heat energy that cannot be dissipated, seriously affecting the service life of the light source. Therefore, there must be a cooling system in the UV-LED light curing equipment to reduce the temperature of the LED chip, ensure the high power and stable output of the light source, and reduce the light decay. For the existing technology, please refer to: the name of the invention "LED cooling system" (patent number 201280051970.3, publication number CN103890489A, publication date 2014.06.25), the title of the invention "Modular LED cooling system" (patent number 20120516244.6, publication number CN102997206A, publication date 2013.03.27). The above technologies adopt air cooling, and use fans to accelerate the air circulation and reduce the temperature of the heat sink. This cooling method is unstable, greatly affected by the ambient temperature, and the cooling speed is slow, requiring manual control, which wastes human resources. Invention name "A cooling system for LED-based UV curing lamps" (patent number 201521123981.5, publication number CN205447654U, publication date 2016.08.10) and invention title "High-power LED cooling system" (patent number 201010535536.5, publication number CN102064274A, publication 2011.05.18) and other patents. The above-mentioned technology adopts water-cooled cooling, and uses low-temperature cooling water to circulate in the pipeline. This method has a better cooling effect than air-cooled, but the water-cooled system has complex structure, high cost, high failure rate and complicated maintenance.

Contents of the invention

The purpose of the present invention is to provide an air cooling system of an intelligently controlled UV-LED light curing device, which solves the problems of the existing cooling system such as complex structure, low intelligence, high cost, and poor cooling effect.

The technical solution adopted by the present invention to solve its technical problems is:

An air cooling system of an intelligently controlled UV-LED light curing device, characterized in that it includes a housing, a heat dissipation plate, an LED light board, a light-transmitting plate, an end cover, a refrigeration unit and a control center, and the heat dissipation plate, the LED light The board and the light-transmitting board are installed in the casing, and the LED lamp board is installed on the cooling plate. The end covers are installed on both ends of the casing, and a cooling cavity is provided between the cooling plate and the casing. The air flows through the cooling chamber to take away the heat on the cooling plate, thereby reducing the temperature of the LED lamp board. The refrigeration unit includes a compressor, a condenser, a throttle valve, and an evaporator. The cooling plate includes an aluminum base, a partition, As for the deflector, the LED light board is fixed under the aluminum plate base, and the deflector with an inclination angle of 30°-60° is arranged on the heat dissipation plate, and the inclination direction of the deflector is opposite to the direction of air flow.

The control center includes a controller module, a refrigeration unit drive module, and a temperature sensor for detecting the temperature in the cooling chamber. The output terminal of the temperature sensor is connected to the input terminal of the controller module, and the output terminal of the controller module is connected to the refrigeration unit drive module. The refrigeration unit drives The module drives the refrigeration unit to work. The temperature sensor monitors the real-time temperature of the LED light board and feeds back the monitored temperature value to the controller module. By comparing with the threshold value set in the controller module, the intelligent control of the cooling system switch is realized.

A slot for installing a heat dissipation plate and a slot for installing a light-transmitting plate are provided on the inner wall of the housing.

The light-transmitting plate is installed under the LED light board, and the height from the lamp bead is 5mm, and the light-transmitting plate is a quartz glass plate.

The LED lamp board is fixed on the aluminum base by screws.

The end cover includes a left end cover and a right end cover. The right end cover has an air intake hole and an air outlet hole. There is a buried pipe inside to lead out the driving circuit of the LED lamp board. There are notches on both sides of the left end cover and the right end cover. The inner wall of the housing has an insertion strip inserted into the notch.

The deflector is provided with a number of guide holes, and above the guide hole is a guide vane for changing the flow direction of the cold air. It has an outlet communicating with the guide hole.

The cooling cavity is surrounded by a heat dissipation plate, baffles at both ends of the heat dissipation plate and a casing, and the heat dissipation plate is provided with a wall hole for leading out a driving line of the LED light board.

The beneficial effects of the present invention are: the present invention fills up the blank of the air-cooling cooling system of UV-LED photo-curing equipment in the market. Compared with UV-LED light curing equipment with air-cooled and water-cooled cooling systems, this system realizes intelligent control, high efficiency and energy saving, and the closed circulation system is not easily affected by the external environment, ensuring stable operation of LED lights, reducing the pearlescent decay of LED lights, and prolonging the life of the equipment. service life.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is the front view of the overall structure of the air cooling system of the intelligently controlled UV-LED light curing device of the present invention;

Fig. 2 is the structural block diagram of the air cooling system of the UV-LED light curing device of intelligent control of the present invention;

Fig. 3 is the bottom view of the air cooling system of the intelligently controlled UV-LED light curing device;

Figure 4 is an exploded view of the air cooling system of the intelligently controlled UV-LED light curing device;

Fig. 5 is a front full sectional view of the shell of the air cooling system of the intelligently controlled UV-LED light curing device;

Fig. 6 is the front view of the cooling plate of the air cooling system of the intelligently controlled UV-LED light curing device;

Fig. 7 is a top view of the cooling plate of the air cooling system of the intelligently controlled UV-LED light curing device;

Figure 8 is a distribution diagram of the deflectors of the air cooling system of the intelligently controlled UV-LED light curing device;

Fig. 9 is a sectional view of the deflector of the air cooling system of the intelligently controlled UV-LED light curing device;

Fig. 10 is the front view of the end cover of the air cooling system of the intelligently controlled UV-LED light curing device;

Fig. 11 is the rear view of the end cover of the air cooling system of the intelligently controlled UV-LED light curing device;

Figure 12 is a right view of the end cover of the air cooling system of the intelligently controlled UV-LED light curing device;

Figure 13 is a top view of the air cooling system of the intelligently controlled UV-LED light curing device;

Fig. 14 is a cross-sectional view at Fig. 13A-A place;

Fig. 15 is a cross-sectional view at Fig. 13B-B.

detailed description

The front view of the overall structure of the intelligently controlled UV-LED light curing device of the present invention is shown in FIG. 1 . The curing device includes UV-LED light source, conveyor belt, control cabinet and refrigeration unit. The temperature sensor 206 is installed on the heat dissipation plate of the UV-LED light source, and the controller and the refrigeration unit are inside the control cabinet. The transmission speed of the conveyor belt is 0-30m/s.

The functional block diagram of the present invention is shown in Figure 2, the control center includes a controller module, a refrigeration unit drive module, a temperature sensor for detecting the temperature in the cooling chamber, the output terminal of the temperature sensor is connected to the input terminal of the controller module, and the controller module The output terminal is connected to the refrigeration unit drive module, the refrigeration unit drive module drives the refrigeration unit to work, the temperature sensor monitors the real-time temperature of the LED light board and feeds back the monitored temperature value to the controller module, and compares it with the threshold value set in the controller module, and then The output signal automatically controls the drive circuit of the refrigeration unit to turn on or off the refrigeration unit. If the temperature value is higher than the threshold, the controller module outputs the signal to control the refrigeration unit drive circuit to open; if the temperature value is lower than the threshold, the controller module outputs the signal to control the drive of the refrigeration unit. The circuit is closed, thereby realizing intelligent control.

The refrigerating unit consists of a compressor, evaporator, condenser, and throttle valve, and uses a new environmentally friendly refrigerant R410A. After the refrigerating unit receives the working signal from the driving circuit of the refrigerating unit, the compressor compresses the low-temperature and low-pressure gaseous refrigerant into a low-temperature and high-pressure gaseous state and discharges it to the condenser. The gaseous refrigerant liquefies here and releases heat. The high-pressure liquid refrigerant flows through the throttle valve and is sprayed into the evaporator, the space becomes larger, the pressure decreases, the refrigerant evaporates, absorbs a large amount of heat, and reduces the temperature of the gas in the suction chamber. The low-temperature gas is injected into the cooling cavity through the air inlet 601 to absorb the heat on the heat dissipation plate 2, and then flows into and out of the air cavity through the narrow upper and lower wide slots 205, and finally the high-temperature gas is discharged from the air outlet 602, in order to achieve better cooling Effect.

As shown in FIGS. 3-15 , the specific structure of the cooling plate 2 is that it includes an aluminum plate base 201 , a separator 202 , a deflector 203 and a temperature sensor 206 . The lower end surface is an aluminum board base 201 for fixing and installing the LED light board 3 . Wall holes 204 are left at both ends of the lower end surface to lead out the driving circuit of the LED lamp board 3 . Both ends of the cooling plate 2 are baffles, which are in airtight contact with the casing to form a cooling cavity, so that a sealed space formed by the baffle, the upper surface of the cooling plate 2 and the top surface of the casing 1 is a cooling cavity, and the height of the cooling cavity is 15-20mm. The end of the board is provided with a slot 205 with a narrow top and a wide bottom, through which cold air flows into and out of the air cavity from the air intake cavity. A temperature sensor is also installed on the cooling plate 2 to monitor the real-time temperature of the LED lamp panel and feed back the monitoring signal to the controller, and realize the intelligent control of the cooling system switch by comparing with the set threshold. There is a divider 202 in the middle of the upper surface of the cooling plate 2 to divide the cooling cavity into an air inlet cavity and an air outlet cavity. The two sides of the divider are guide vanes 203. The inclination angle of the guide vanes 203 is 30°-60°, and the inclination direction is the same as The direction of the air flow is opposite, and the two sides of the separator 202 are arranged oppositely. The vertical height of the deflectors is 12-15mm, and the spacing is 100mm.

The surface of the deflector 203 is cut and recessed to form a number of guide holes and guide vanes. In this example, there are two rows, three in each row. The edge of the hole is integrated, and the guide plate has an outlet connected to the guide hole. The guide hole and the guide plate guide the cold air to flow downwards towards the cooling plate 2, thus increasing the contact area and contact time between the cold air and the cooling plate, and improving the heat dissipation efficiency , and we know that air is a poor conductor of heat, and the deflector 203, the guide hole and the guide plate can make the air form a turbulent flow, so that the hotter airflow close to the heat sink 2 can quickly and the farther away from the heat sink 2 The cold air mixes and takes away the heat, avoiding the overheating of the air near the radiator plate 2 and the overcooling of the air far away from the radiator plate 2, thereby improving the heat transfer efficiency and heat dissipation effect.

The shell 1 is a groove structure, including a top surface and two side surfaces. Four insertion strips are respectively installed on the inner walls of the two sides, and a slot is formed between each corresponding two insertion strips. The slots include an upper end slot 102 and a lower end slot 103. The upper end slot 102 is the installation slot for the cooling plate 2, and the lower end slot 103 is for the installation of the light transmission plate 4. groove. There are four screw holes 101 at both ends of the shell 1, and a M2.5 screw is screwed into the threaded hole 605 of the end cover through the screw holes 101, and the end cover is fastened to the corresponding end of the shell 1.

The LED lamp board 3 selects a high-power patch-type LED lamp bead 301, and screws the M2.5 screw into the screw hole 302 to fix the LED lamp board 3 on the aluminum base 201 on the lower end surface of the cooling plate 2.

Below the LED lamp board 3 is a light-transmitting board 4 . The light-transmitting plate 4 isolates the LED light board 3 from the outside world, prevents dust from entering the device, and at the same time requires the light-transmitting plate 4 to have a high luminous flux to reduce light energy loss. The light-transmitting plate 4 is made of quartz glass.

The end cover includes a left end cover 5 and a right end cover 6, which are respectively installed on both sides of the housing 1. The right end cover 6 has an air inlet hole and an air outlet hole, and an embedded pipe 603 is arranged inside to lead out the driving circuit of the LED lamp board 3. The left end cover 5 and the The lower ends of both sides of the right end cover 6 have notches 604, and the inner wall of the housing 1 has inserts inserted into the notches. When fixed on the two ends of the shell 1, the inserts on the inner wall of the shell 1 are just embedded, and the end cap can be initially fixed. There are four threaded holes 605 around the inner side of the end cover, and the M2.5 screws pass through the screw holes 101 around the shell 1, and screw into the threaded holes 605 to fix the end cover.

The air cooling system of the intelligent UV-LED light curing device of the present invention fills the gap in the air cooling mode in the market. Compared with air-cooled and water-cooled UV-LED light curing devices, this system improves the cooling effect, ensures high-power and stable operation of LED lights, simplifies the equipment structure, realizes intelligent control of the cooling system, and effectively reduces equipment energy consumption.

The air cooling system of an intelligently controlled UV-LED light curing device provided by the embodiment of the present invention has been introduced in detail above. In this paper, specific examples have been used to illustrate the principle and implementation of the present invention. The above embodiments The description is only used to help understand the method of the present invention and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and scope of application. In summary, As stated above, the content of this specification should not be construed as limiting the present invention.

Claims (8)

1. a kind of cooling system of the UV-LED light curring units of intelligent control, including, it is characterised in that：Including shell, radiating Plate, LED lamp panel, light-passing board, end cap, refrigeration unit and control centre, the heat sink, LED lamp panel, light-passing board are mounted on outer In shell, and LED lamp panel is installed on heat sink, and the end cap is installed on the both ends of shell, and is provided between heat sink and shell cold But chamber, cold air caused by the refrigeration unit flow through cooling chamber and take away the heat on heat sink, so as to reduce LED lamp panel temperature Degree, the refrigeration unit include compressor, condenser, choke valve, evaporator, and the heat sink includes aluminum plate foundation, dividing plate, water conservancy diversion Piece, the LED lamp panel are fixed on below aluminum plate foundation, and the flow deflector that angle of inclination is 30 ° -60 °, water conservancy diversion are provided with above heat sink The incline direction of piece and air current flow are in opposite direction.

A kind of 2. cooling system of the UV-LED light curring units of intelligent control according to claim 1, it is characterised in that: The control centre includes controller module, refrigeration unit drive module, the temperature sensor for detecting cooling cavity temperature, Temperature sensor output termination controller module input, controller module output termination refrigeration unit drive module, refrigeration machine Group drive module driving refrigeration unit work, temperature sensor monitors LED lamp panel real time temperature simultaneously feed back the temperature value of monitoring To controller module, by the threshold value with being set in controller module compared with, and realize cooling system and switch intelligent control.

A kind of 3. cooling system of the UV-LED light curring units of intelligent control according to claim 1, it is characterised in that: The outer casing inner wall is provided with one and is used to install heat sink and a slot for being used to install light-passing board.

A kind of 4. cooling system of the UV-LED light curring units of intelligent control according to claim 3, it is characterised in that: The light-passing board is arranged on the lower section of LED lamp panel, and the height away from lamp bead is 5mm, and light-passing board is quartz glass plate.

A kind of 5. cooling system of the UV-LED light curring units of intelligent control according to claim 1, it is characterised in that: The LED lamp panel is fixed on aluminum plate foundation by screw.

A kind of 6. cooling system of the UV-LED light curring units of intelligent control according to claim 1, it is characterised in that: The end cap includes left end cap and right end cap, and right-hand member is stamped air admission hole and venthole, and there is Sunken wire tube inner side, and LED lamp panel is driven Circuit is drawn, and there is notch the both sides lower end of left end cap and right end cap, and the outer casing inner wall has the cutting for inserting the notch.

A kind of 7. cooling system of the UV-LED light curring units of intelligent control according to claim 1, it is characterised in that: The flow deflector is provided with some guide holes, and the prerotation vane for being used for changing cold air flow direction, the guiding are provided with above the guide hole Piece is is bent into arc, and the edge of the prerotation vane joins with guide hole edge, and prerotation vane has an outlet connected with guide hole.

A kind of 8. cooling system of the UV-LED light curring units of intelligent control according to claim 1, it is characterised in that: The cooling chamber is surrounded by heat sink, the baffle plate at heat sink both ends and shell, and heat sink is provided with the drive for being used for drawing LED lamp panel The cinclides of moving-wire.