Disclosure of Invention
The technical problem is as follows:
3D printer can produce a large amount of heats at the during operation often, if not dispel the heat in time then can exert an influence to the printing, cause the bad of printing the finished product, even the damage of equipment.
In order to solve the problems, the embodiment designs a 3D printer cooling system with high-temperature forced cooling function, and the 3D printer cooling system with high-temperature forced cooling function comprises a machine body, wherein a working cavity is arranged in the machine body, a printing column is fixedly arranged on the upper wall of the working cavity, a printing nozzle is fixedly arranged on the lower end face of the printing column, air supply channels are respectively communicated with the left side wall and the right side wall of the working cavity, a cooling cavity is arranged in the machine body and on the upper side of the working cavity, the air supply channels on the left side and the right side are respectively communicated with the left side wall and the right side wall of the cooling cavity, a fan cover is fixedly arranged between the upper wall and the lower wall of the air supply channel and at one end communicated with the working cavity, ventilation openings are arranged in the fan cover in a left-right through mode, an air outlet fan is rotatably arranged between the upper wall and the lower wall of the ventilation openings on the left side, and an air inlet fan is rotatably arranged between the upper wall and the lower wall of the ventilation openings on the right side, the working cavity lower wall is communicated with a lifting cavity, the lifting cavity is internally provided with a working platform which can slide up and down, a cooling pipe which can absorb the heat of gas in the cooling cavity is fixedly connected between the cooling cavity left wall and the cooling cavity upper wall right side, the cooling cavity upper side is provided with a cooling liquid cavity, a circulating pump is fixedly arranged in the machine body and on the left side of the cooling liquid cavity, the lower end of the circulating pump is communicated with the cooling pipe, the upper right end of the cooling pipe is communicated with the cooling liquid cavity lower wall, a connecting pipeline is communicated between the circulating pump right end surface and the cooling liquid cavity left wall, the upper side in the machine body is provided with a heat dissipation cavity with an upward opening, a heat dissipation cover is fixedly arranged between the heat dissipation cavity lower wall and the cooling liquid cavity upper wall, the heat dissipation cavity inner wall is fixedly provided with a heat dissipation fan cover on the heat dissipation cover upper side, and a heat dissipation vent which is communicated up and down is arranged in the heat dissipation fan cover, the heat dissipation ventilation vent internal energy pivoted is equipped with radiator fan, just be in the organism the working chamber upside is equipped with the mainboard chamber, the fixed control that is equipped with of mainboard intracavity wall the control mainboard of printing the post, mainboard chamber upside intercommunication is equipped with the water-cooling chamber, the water-cooling intracavity is fixed to be equipped with the water-cooling cover, be equipped with the decurrent water-cooling lumen of opening in the water-cooling cover, water-cooling lumen left wall with fixed mainboard coolant liquid pipe that is equipped with between the coolant liquid chamber right wall, mainboard coolant liquid pipe left end with terminal surface intercommunication under the circulating pump, mainboard coolant liquid pipe right-hand member with coolant liquid chamber right wall intercommunication.
Preferably, a belt wheel cover is fixedly arranged on the lower wall of the air supply channel on the left side and the right side and on one side of the fan cover far away from the working cavity, an upper belt wheel cavity is arranged in the belt wheel cover, a fan shaft is rotatably arranged between the front wall and the rear wall of the upper belt wheel cavity, one end of the fan shaft on the left side and the right side, which is close to the working cavity, extends into the air vent and is fixedly connected with an air outlet fan and an air inlet fan rotating center respectively, a driven belt wheel is fixedly arranged on the outer circumferential surface of the fan shaft and in the upper belt wheel cavity, a lower belt wheel cavity is arranged in the machine body and communicated with the upper belt wheel cavity, a power shaft is rotatably arranged between the left wall and the right wall on the lower side of the lower belt wheel cavity, a driving belt wheel is fixedly arranged on the outer circumferential surface of the power shaft and in the lower belt wheel cavity, a belt is wound between the driving belt wheel and the driven belt wheel, and a power motor is fixedly arranged in the machine body and on the lower side of the working cavity, the right end of the power shaft on the left side and the left end of the power shaft on the right side are respectively in power connection with the left end face and the right end face of the power motor.
Preferably, a lifting spring is fixedly connected between the lower end surface of the working platform and the lower wall of the lifting cavity, and corresponding electromagnets are respectively and fixedly arranged on the upper end surface of the working platform and the lower wall of the lifting cavity.
Preferably, a heat dissipation transmission cover is fixedly arranged on the right wall of the heat dissipation cavity and on the upper side of the heat dissipation fan cover, a heat dissipation bevel gear cavity is arranged in the heat dissipation transmission cover, a heat dissipation fan shaft is rotatably arranged between the upper wall and the lower wall of the heat dissipation bevel gear cavity, the lower end of the heat dissipation fan shaft extends into the heat dissipation vent and is fixedly connected with the rotation center of the heat dissipation fan, a heat dissipation driven bevel gear is fixedly arranged on the outer circumferential surface of the heat dissipation fan shaft and in the heat dissipation bevel gear cavity, a belt wheel cavity is arranged in the machine body and on the right side of the air supply channel on the right side, the right end of the power shaft on the right side extends into the right wall on the lower side of the belt wheel cavity and is rotatably connected with the right end of the power shaft on the right side, a first heat dissipation driving belt wheel is fixedly arranged on the outer circumferential surface of the right end of the power shaft, a transmission shaft is rotatably arranged between the left wall and the right wall on the upper side of the belt wheel cavity, and a second heat dissipation driving belt wheel is fixedly arranged on the outer circumferential surface of the belt wheel cavity, and a heat dissipation transmission belt is wound between the second heat dissipation driving belt wheel and the first heat dissipation driving belt wheel, the left end of the transmission shaft extends into the cavity of the heat dissipation bevel gear, a heat dissipation driving bevel gear is fixedly arranged on the outer circumferential surface of the transmission shaft, and the heat dissipation driving bevel gear is meshed with the heat dissipation driven bevel gear.
Preferably, the inner wall of the heat dissipation cavity and the upper side of the heat dissipation transmission cover are fixedly provided with heat dissipation fins, and heat dissipation ports are uniformly distributed in the heat dissipation fins from left to right and are communicated up and down.
Preferably, the left end face and the right end face of the printing column are respectively provided with a containing cavity with an outward opening, a turnover shaft is rotatably arranged between the front wall and the rear wall of the containing cavity, a cooling cover is fixedly arranged on the outer circular surface of the turnover shaft, a high-temperature cooling cavity with a downward opening and a left side and a right side away from the left side and the right side is arranged in the cooling cover, a hose cavity is arranged between the containing cavities in the printing column and in the left side and the right side, hose ports are communicated between the left wall and the right wall of the hose cavity and the containing cavities in the left side and the right side, winding shafts are symmetrically rotated on the upper wall and the lower wall of the hose cavity and are respectively wound on the outer circular surfaces of the winding shafts in the left side and the right side, the hose is in a tensioning state, the lower end of the hose penetrates through the hose ports to be communicated with the high-temperature cooling cavity, and the left side of the printing column is communicated with the upper end of the hose is provided with a liquid inlet channel, print in the post and communicate the right side the hose upper end is equipped with liquid outlet channel, liquid inlet channel left side intercommunication is equipped with the slider chamber, slider chamber left side just right liquid inlet channel left end intercommunication is equipped with the feed liquor pipe, feed liquor pipe upper end with terminal surface intercommunication under the circulating pump, print in the post and be in the fixed micropump that is equipped with in liquid outlet channel right side, micropump left end face intercommunication the liquid outlet channel right-hand member, micropump right-hand member face intercommunication is equipped with the drain pipe, drain pipe upper end with cooling liquid chamber right side wall intercommunication.
Preferably, the slider intracavity can be gliding from top to bottom be equipped with the slider, what link up about in the slider is equipped with the intercommunication mouth, when the slider moves down to lower extreme position, the intercommunication mouth can with feed liquor passageway with the feed liquor pipe intercommunication, the slider up end rotates in the interior and is equipped with the screw rod.
Preferably, a centrifugal wheel cavity is arranged in the printing column and on the upper side of the hose cavity, a driving shaft is rotatably arranged between the upper wall and the lower wall of the centrifugal wheel cavity, a centrifugal wheel is fixedly arranged on the outer circular surface of the lower end of the driving shaft, an outer gear is rotatably arranged on the outer circular surface of the centrifugal wheel, a locking pin cavity with an outward opening is arranged in the circumferential array of the centrifugal wheel, a locking pin is slidably arranged in the locking pin cavity, a locking spring is fixedly connected between the end surface of the locking pin close to the driving shaft and the side wall of the locking pin cavity close to the centrifugal wheel, a locking groove with an inward opening and right opposite to the locking pin cavity is arranged in the circumferential array of the inner wall of the outer gear, one end of the locking pin, which is far away from the driving shaft, can enter the locking groove, winding gear cavities are respectively communicated with the lower sides of the left wall and the right wall of the centrifugal wheel cavity, the upper ends of the left side and the right side of the winding shaft respectively extend to the left side and the right side of the winding gear cavity and are rotatably connected to the upper wall of the winding gear cavity, and winding gears meshed with the external gears are respectively fixedly arranged on the outer circular surfaces of the upper ends of the winding shafts on the left side and the right side.
Preferably, a gear cavity is communicated between the upper side of the left wall of the centrifugal wheel cavity and the slider cavity, a worm wheel shaft is rotatably arranged between the upper wall and the lower wall of the gear cavity, a worm wheel meshed with the screw is fixedly arranged on the outer circular surface of the upper end of the worm wheel shaft, a transmission gear is fixedly arranged on the outer circular surface of the lower end of the worm wheel shaft, a driving gear meshed with the transmission gear is fixedly arranged on the outer circular surface of the driving shaft, a micro motor is fixedly arranged in the upper wall of the centrifugal wheel cavity, and the upper end of the driving shaft is in power connection with the lower end face of the micro motor.
The invention has the beneficial effects that: according to the invention, hot air in the working cavity is conveyed into the cooling cavity, then the cooling liquid absorbs heat to dissipate heat of the printing nozzle, then the cooling liquid is internally circulated to release heat, the control mainboard can be cooled, and meanwhile, when the printing nozzle is in a high-temperature emergency state, the printing nozzle can be forcibly cooled by the cooling liquid directly through an ingenious structure, so that the printing nozzle is prevented from being damaged due to high temperature.
Detailed Description
The invention will now be described in detail with reference to fig. 1-6, for ease of description, the orientations described below will now be defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.
The invention relates to a 3D printer cooling system with a high-temperature forced cooling function, which comprises a machine body 11, wherein a working cavity 12 is arranged in the machine body 11, a printing column 14 is fixedly arranged on the upper wall of the working cavity 12, a printing spray head 15 is fixedly arranged on the lower end face of the printing column 14, air supply channels 13 are respectively communicated with the left side wall and the right side wall of the working cavity 12, a cooling cavity 16 is arranged in the machine body 11 and on the upper side of the working cavity 12, the air supply channels 13 on the left side and the right side are respectively communicated with the left side wall and the right side wall of the cooling cavity 16, a fan cover 23 is fixedly arranged between the upper wall and the lower wall of the end communicated with the working cavity 12 of the air supply channels 13, vent holes 22 are arranged in the fan cover 23 in a left-right through mode, an air outlet fan 24 can be rotatably arranged between the upper wall and the lower wall of the vent hole 22 on the left side, and an air inlet fan 97 can be rotatably arranged between the upper wall and the lower wall of the vent hole 22 on the right side, working chamber 12 lower wall intercommunication is equipped with lift chamber 17, the gliding work platform 18 that is equipped with about can in lift chamber 17, cooling chamber 16 left side wall with fixedly connected with can absorb between the cooling chamber 16 upper wall right side the thermal cooling tube 21 of gas in the cooling chamber 16, cooling chamber 16 upside is equipped with cooling liquid chamber 45, in the organism 11 and in the fixed circulating pump 91 that is equipped with in cooling liquid chamber 45 left side, circulating pump 91 lower extreme intercommunication cooling tube 21, the upper right end of cooling tube 21 communicate in cooling liquid chamber 45 lower wall, the intercommunication is equipped with connecting tube 92 between circulating pump 91 right-hand member face and the cooling liquid chamber 45 left side wall, the upside is equipped with the ascending heat dissipation chamber 44 of opening in the organism 11, heat dissipation chamber 44 lower wall with the fixed radiator cap 46 that is equipped with between the cooling liquid chamber 45 upper wall, heat dissipation chamber 44 inner wall just is in the fixed radiator cap 46 upside is equipped with radiator fan cover 47, be equipped with the heat dissipation vent 48 that link up from top to bottom in the radiator fan cover 47, can the pivoted be equipped with radiator fan 49 in the heat dissipation vent 48, just be in the organism 11 the 12 upside in working chamber is equipped with mainboard chamber 98, the fixed being equipped with in mainboard chamber 98 inner wall can control print the control mainboard 39 of post 14, mainboard chamber 98 upside intercommunication is equipped with water-cooling chamber 40, water-cooling chamber 40 internal fixation is equipped with water-cooling cover 41, be equipped with the decurrent water-cooling tube chamber 42 of opening in the water-cooling cover 41, water-cooling tube chamber 42 left wall with fixed mainboard cooling liquid pipe 94 that is equipped with between the cooling liquid chamber 45 right wall, mainboard cooling liquid pipe 94 left end with terminal surface intercommunication under the circulating pump 91, mainboard cooling liquid pipe 94 right-hand member with cooling liquid chamber 45 right wall intercommunication.
Beneficially, a pulley cover 25 is fixedly arranged on the lower wall of the air supply channel 13 on the left and right sides and on the side of the fan cover 23 away from the working chamber 12, an upper pulley chamber 27 is arranged in the pulley cover 25, a fan shaft 26 is rotatably arranged between the front and rear walls of the upper pulley chamber 27, one end of the fan shaft 26 on the left and right sides near the working chamber 12 extends into the ventilation opening 22 and is fixedly connected with the rotation centers of the air outlet fan 24 and the air inlet fan 97 respectively, a driven pulley 28 is fixedly arranged on the outer circumferential surface of the fan shaft 26 and in the upper pulley chamber 27, a lower pulley chamber 29 is arranged in the machine body 11 and communicated with the upper pulley chamber 27, a power shaft 32 is rotatably arranged between the left and right walls on the lower side of the lower pulley chamber 29, a driving pulley 31 is fixedly arranged on the outer circumferential surface of the power shaft 32 and in the lower pulley chamber 29, and a belt 30 is wound between the driving pulley 31 and the driven pulley 28, and a power motor 33 is fixedly arranged at the lower side of the working cavity 12 in the machine body 11, and the right end of the power shaft 32 and the left end of the power shaft are respectively in power connection with the left end surface and the right end surface of the power motor 33 at the left side.
Beneficially, a lifting spring 20 is fixedly connected between the lower end face of the working platform 18 and the lower wall of the lifting cavity 17, and corresponding electromagnets 19 are respectively and fixedly arranged on the upper end face of the working platform 18 and the lower wall of the lifting cavity 17.
Beneficially, a heat dissipation transmission cover 87 is fixedly arranged on the right wall of the heat dissipation cavity 44 and on the upper side of the heat dissipation fan cover 47, a heat dissipation bevel gear cavity 88 is arranged in the heat dissipation transmission cover 87, a heat dissipation fan shaft 50 is rotatably arranged between the upper wall and the lower wall of the heat dissipation bevel gear cavity 88, the lower end of the heat dissipation fan shaft 50 extends into the heat dissipation vent 48 and is fixedly connected with the rotation center of the heat dissipation fan 49, a heat dissipation driven bevel gear 89 is fixedly arranged on the outer circumferential surface of the heat dissipation fan shaft 50 and in the heat dissipation bevel gear cavity 88, a pulley cavity 35 is arranged in the machine body 11 and on the right side of the air supply channel 13, the right end of the power shaft 32 on the right side extends into the right wall on the lower side of the pulley cavity 35 and is rotatably connected, a first heat dissipation driving pulley 34 is fixedly arranged on the outer circumferential surface of the right end of the power shaft 32 on the right side, and a transmission shaft 38 is rotatably arranged between the left wall and right wall on the upper side of the pulley cavity 35, a second heat dissipation driving pulley 37 is fixedly arranged on the outer circular surface of the transmission shaft 38 in the pulley cavity 35, a heat dissipation transmission belt 36 is wound between the second heat dissipation driving pulley 37 and the first heat dissipation driving pulley 34, the left end of the transmission shaft 38 extends into the heat dissipation bevel gear cavity 88, a heat dissipation driving bevel gear 90 is fixedly arranged on the outer circular surface, and the heat dissipation driving bevel gear 90 is meshed with the heat dissipation driven bevel gear 89.
Beneficially, the heat dissipation fins 85 are fixedly arranged on the inner wall of the heat dissipation cavity 44 and on the upper side of the heat dissipation transmission cover 87, and the heat dissipation fins 85 are uniformly distributed in the left and right direction and are provided with heat dissipation ports 86 which are vertically through.
Beneficially, the left and right end faces of the printing column 14 are respectively provided with a containing cavity 51 with an outward opening, the containing cavity 51 is rotatably provided with a turning shaft 52 between the front wall and the rear wall, the outer circular face of the turning shaft 52 is fixedly provided with a cooling cover 53, the cooling cover 53 is internally provided with a high-temperature cooling cavity 54 with a downward opening and a left side and a right side far away from the symmetrical center direction of the cooling cover, the printing column 14 is internally provided with a hose cavity 55 between the containing cavities 51 at the left side and the right side, hose ports 59 are communicated between the left wall and the right wall of the hose cavity 55 and between the left wall and the right wall of the hose cavity 55, a winding shaft 56 is symmetrically rotatably provided between the upper wall and the lower wall of the hose cavity 55, hoses 58 are respectively wound around the outer circular faces of the winding shafts 56 at the left side and the right side, the hose 58 is in a tensioned state, the lower end of the hose 58 penetrates through the hose port 59 to be communicated with the high-temperature cooling cavity 54, the printing column 14 is communicated with the left side, the upper end of the hose 58 is provided with a liquid inlet channel 64, print in the post 14 and communicate the right side hose 58 upper end is equipped with outlet channel 69, inlet channel 64 left side intercommunication is equipped with slider chamber 65, slider chamber 65 left side just right inlet channel 64 left end intercommunication is equipped with feed liquor pipe 93, feed liquor pipe 93 upper end with terminal surface intercommunication under the circulating pump 91, print in the post 14 and be in the fixed micropump 63 that is equipped with in outlet channel 69 right side, micropump 63 left end face intercommunication outlet channel 69 right-hand member, micropump 63 right-hand member face intercommunication is equipped with drain pipe 95, drain pipe 95 upper end with the 45 right wall intercommunication in cooling liquid chamber.
Beneficially, a slide block 66 is arranged in the slide block cavity 65 and can slide up and down, a communicating opening 67 is arranged in the slide block 66 and penetrates left and right, when the slide block 66 moves down to a lower limit position, the communicating opening 67 can communicate the liquid inlet channel 64 with the liquid inlet pipe 93, and a screw 68 is rotatably arranged in the upper end face of the slide block 66.
Advantageously, a centrifugal wheel cavity 74 is formed in the printing column 14 and on the upper side of the soft tube cavity 55, a driving shaft 75 is rotatably arranged between the upper wall and the lower wall of the centrifugal wheel cavity 74, a centrifugal wheel 79 is fixedly arranged on the outer circular surface of the lower end of the driving shaft 75, an outer circular surface of the centrifugal wheel 79 is rotatably arranged on the outer circular surface, an outer locking gear 82 is rotatably arranged on the outer circular surface, a locking pin cavity 80 with an outward opening is formed on the inner circumferential array of the centrifugal wheel 79, a locking pin 83 is slidably arranged in the locking pin cavity 80, a locking spring 84 is fixedly connected between one end surface of the locking pin 83 close to the driving shaft 75 and one side wall of the locking pin cavity 80 close to the centrifugal wheel 79, a locking groove 81 with an inward opening and opposite to the locking pin cavity 80 is formed on the circumferential array of the inner wall of the outer gear 82, one end of the locking pin 83 far from the driving shaft 75 can enter the locking groove 81, and winding gear cavities 77 are respectively and communicated with the lower sides of the left wall and the right wall of the centrifugal wheel cavity 74, the upper ends of the winding shafts 56 on the left and right sides extend to the left and right sides respectively, the winding gear chambers 77 are internally and rotatably connected to the upper wall of the winding gear chambers 77, and the outer circular surfaces of the upper ends of the winding shafts 56 on the left and right sides are respectively and fixedly provided with winding gears 78 engaged with the outer gears 82.
Advantageously, a gear cavity 71 is communicated between the upper side of the left wall of the centrifugal wheel cavity 74 and the slider cavity 65, a worm wheel shaft 73 is rotatably arranged between the upper wall and the lower wall of the gear cavity 71, a worm wheel 96 engaged with the screw 68 is fixedly arranged on the outer circumferential surface of the upper end of the worm wheel shaft 73, a transmission gear 72 is fixedly arranged on the outer circumferential surface of the lower end of the worm wheel shaft 73, a driving gear 76 engaged with the transmission gear 72 is fixedly arranged on the outer circumferential surface of the driving shaft 75, a micro motor 70 is fixedly arranged in the upper wall of the centrifugal wheel cavity 74, and the upper end of the driving shaft 75 is in power connection with the lower end surface.
The following describes in detail the usage steps of a 3D printer cooling system with high temperature forced cooling function in this document with reference to fig. 1 to 6:
in the initial state, the working platform 18 is located at the upper limit position, the cooling tube 21 is filled with cooling liquid, the water cooling tube 43 is filled with cooling liquid, the cooling cover 53 is located at the upper limit position, the slide block 66 is located at the upper limit position, and the locking pin 83 is completely accommodated in the locking pin cavity 80.
During normal operation, the printing nozzle 15 generates heat during printing operation, and at the same time, the main board 39 is controlled to run to generate heat, the power motor 33 is started, and then the power shaft 32 on the left side is driven to rotate through power connection, and then the driving pulley 31 on the left side is driven to rotate, and then the driven pulley 28 on the left side is driven to rotate through the belt 30 on the left side, and then the fan shaft 26 on the left side is driven to rotate, and then the fan 24 is driven to rotate, so that hot air in the working chamber 12 is sucked into the air supply channel 13 on the left side by the rotation of the fan 24, and then the hot air enters the cooling chamber 16 to contact with the cooling pipe 21, and then the cooling liquid in the cooling pipe 21 absorbs heat, the circulating pump 91 is started, and the cooling liquid in the cooling pipe 21 is pumped into the cooling liquid chamber 45, and at the same time, the driving pulley 34 on the right side is driven to rotate by the power shaft 32 on the right side, and then the second heat dissipation driving pulley 37 is driven to rotate through the heat dissipation transmission belt 36, thereby driving the transmission shaft 38 to rotate, further driving the heat dissipation driving bevel gear 90 to rotate, further driving the heat dissipation driven bevel gear 89 to rotate through gear engagement, further driving the heat dissipation fan shaft 50 to rotate, further driving the heat dissipation fan 49 to rotate, thereby dissipating heat of the coolant in the coolant cavity 45 through the heat dissipation cover 46, then dissipating heat to the outside through the heat dissipation fins 85, simultaneously absorbing heat generated by the control main board 39 by the coolant in the water cooling tube 43, then pumping the coolant in the water cooling tube 43 into the coolant cavity 45 through the circulation pump 91, further dissipating heat, driving the right side power shaft 32 to rotate while driving the left side power shaft 32 to rotate by the power motor 33, further driving the right side driving pulley 31 to rotate, further driving the right side driven pulley 28 to rotate by the right side belt 30, further driving the right side fan shaft 26 to rotate, further driving the air intake fan 97 to rotate, and the air cooled in the cooling chamber 16 is sent to the working chamber 12, thereby cooling the print head 15 and the control main board 39 at the same time.
When the printing nozzle 15 is at an excessive temperature, the electromagnet 19 is energized, the electromagnets 19 on the upper side and the lower side attract each other, so as to drive the working platform 18 to descend, further drive the lifting spring 20 to compress, further separate the printed article on the upper end surface of the working platform 18 from the electromagnet 15, at this time, the micro motor 70 is started, further drive the driving shaft 75 to rotate through power connection, further drive the centrifugal wheel 79 to rotate, further drive the locking pin 83 to slide outwards due to centrifugal force, further stretch the locking spring 84, further drive one end of the locking pin 83 far away from the driving shaft 75 to enter the locking groove 81, further drive the external gear 82 to rotate, further drive the winding gear 78 to rotate through gear engagement, further drive the winding shaft 56 to rotate, further enable the hose 58 wound on the winding shaft 56 to be in a loose state, at this time, the cooling cover 53 downwards overturns around the overturning shaft 52 due to the action of gravity, further drive the hose 58 to be separated from the winding shaft 56, simultaneously, the driving shaft 75 rotates to drive the driving gear 76 to rotate, and then the transmission gear 72 is driven to rotate through gear meshing, and then the worm gear shaft 73 is driven to rotate, and then the worm gear 96 is driven to rotate, and then the screw 68 is driven to rotate through threaded connection, so that the screw 68 moves downwards, and then the slide block 66 is driven to descend, when the cooling cover 53 is overturned to the lower limit position, the maximum length of the hose 58 is separated from the winding shaft 56, and simultaneously the slide block 66 descends to the lower limit position, so that the communication port 67 descends to a position capable of communicating the liquid inlet pipe 93 with the liquid inlet channel 64, the micro motor 70 is stopped, at this time, the circulating pump 91 can pump the cooling liquid in the cooling liquid cavity 45 into the high-temperature cooling cavity 54 through the liquid inlet pipe 93, so as to directly cool the high-temperature printing nozzle 15, and simultaneously start the micro pump 63, and further pump the cooling liquid in the high-temperature cooling cavity 54 through the right-side hose 58, then the high-temperature printing nozzle 15 is conveyed into the cooling liquid cavity 45 through the liquid outlet pipe 95 for heat dissipation, after the high-temperature printing nozzle 15 is cooled, the micro motor 70 is reversely started to drive the driving shaft 75 to rotate, the driving shaft 75 is firstly in a low-speed state, so that the external gear 82 cannot be driven to rotate by centrifugal force, the cooling cover 53 does not start to turn over, the driving gear 76 rotates to drive the transmission gear 72 to rotate, the worm gear shaft 73 is driven to rotate, the worm wheel 96 is driven to rotate, the screw 68 is driven to move upwards, the slider 66 is driven to move upwards, the liquid inlet pipe 93 and the liquid inlet channel 64 are disconnected, at the moment, the micro pump 63 continues to completely dry the cooling liquid in the high-temperature cooling cavity 54, the micro pump 63 is stopped, and the driving shaft 75 rotates to a high-speed state, so that the external gear 82 is driven to rotate by centrifugal force, and the cooling cover 53 starts to turn over upwards, meanwhile, the winding shaft 56 rotates to wind and tension the hose 58 again, and when the cooling cover 53 is turned to the upper limit position, the hose 58 is completely wound and the winding shaft 56 is reset.
The invention has the beneficial effects that: according to the invention, hot air in the working cavity is conveyed into the cooling cavity, then the cooling liquid absorbs heat to dissipate heat of the printing nozzle, then the cooling liquid is internally circulated to release heat, the control mainboard can be cooled, and meanwhile, when the printing nozzle is in a high-temperature emergency state, the printing nozzle can be forcibly cooled by the cooling liquid directly through an ingenious structure, so that the printing nozzle is prevented from being damaged due to high temperature.
In the above manner, a person skilled in the art can make various changes depending on the operation mode within the scope of the present invention.