CN108528012B - Rotary pneumatic three-dimensional heat transfer printing unit - Google Patents
Rotary pneumatic three-dimensional heat transfer printing unit Download PDFInfo
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- CN108528012B CN108528012B CN201810425925.9A CN201810425925A CN108528012B CN 108528012 B CN108528012 B CN 108528012B CN 201810425925 A CN201810425925 A CN 201810425925A CN 108528012 B CN108528012 B CN 108528012B
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- 238000010023 transfer printing Methods 0.000 title claims abstract description 39
- 238000012546 transfer Methods 0.000 claims abstract description 49
- 238000010438 heat treatment Methods 0.000 claims description 19
- 239000002184 metal Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 229920001342 Bakelite® Polymers 0.000 claims description 7
- 239000004637 bakelite Substances 0.000 claims description 7
- 238000003475 lamination Methods 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 18
- 238000000034 method Methods 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000007547 defect Effects 0.000 abstract description 4
- 238000005086 pumping Methods 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
- 229910002027 silica gel Inorganic materials 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Abstract
The invention discloses a rotary type air pressure three-dimensional thermal transfer printing unit which comprises at least one air pressure thermal transfer printing structure, wherein each air pressure thermal transfer printing structure comprises a flexible conveying belt, a chain wheel for driving the flexible conveying belt to circularly rotate and an air bag, the air bag is arranged on the flexible conveying belt to form an air cavity, and a heater is arranged in the air cavity. According to the invention, the air bag is driven to rotate by the flexible conveying belt which circularly rotates, so that the processing process of thermal transfer printing is continuous and uninterrupted, single processing in vacuum thermal transfer printing is replaced, continuous online production of thermal transfer printing processing is realized, and the productivity can be greatly improved; in the thermal transfer production, pneumatic thermal transfer is adopted to replace vacuum thermal transfer, heated air is reserved in the air bag and can be recycled, and the defect that most of heat is taken away by pumping the heated air when the vacuum thermal transfer is vacuumized is overcome.
Description
Technical Field
The invention relates to a transfer mechanism in the technical field of thermal transfer printing, in particular to a rotary pneumatic three-dimensional thermal transfer printing unit.
Background
Thermal transfer is a technique of printing a designed pattern on a thermal transfer paper with heat resistance, and then transferring the image on the thermal transfer paper onto various finished products or materials by heating and pressurizing. Aiming at the field, most of China adopts a vacuum heat transfer printing process, the process adds a vacuum link, and a finished product or material and heat-resistant heat transfer printing paper printed with patterns are tightly stuck together by utilizing the adsorption effect of vacuum and then are subjected to heat transfer printing. The adoption of the technology mainly has the following problems:
① The existing thermal transfer printing technology adopts a reciprocating type conveying mechanism to convey the workpiece into a thermal transfer printing chamber for vacuum thermal transfer printing, and each time of work only can carry out thermal transfer printing processing on a single workpiece, the subsequent processing of other workpieces can be carried out only after the whole processing technology of the workpiece is completed completely, and the single workpiece batch processing can only be realized, so that the processing speed is low, the efficiency is low, and the continuous, high-speed and large-batch production of products can not be realized;
② The existing thermal transfer process adopts vacuum thermal transfer, namely, the thermal transfer paper is contacted with the surface of a workpiece by using elastic silica gel, then the air between the silica gel and the workpiece is pumped out by using a vacuumizing method, the thermal transfer paper is tightly adhered to the surface of the workpiece by using negative pressure, and then the thermal transfer is heated and transferred;
③ The existing thermal transfer printing technology adopts a method of single-sided thermal transfer printing processing of a workpiece, only one surface of the workpiece can be subjected to thermal transfer printing at a time, and if double-sided transfer printing is needed, the workpiece is required to be overturned for secondary processing, so that the thermal transfer printing processing of the back surface of the workpiece is realized, the production efficiency is low, and the speed is low.
Disclosure of Invention
The invention aims to provide a rotary pneumatic three-dimensional heat transfer printing unit, which enables the processing process of heat transfer printing to be continuous and uninterrupted, replaces single processing in vacuum heat transfer printing, realizes continuous online production of heat transfer printing processing, and can greatly improve the productivity.
The invention solves the technical problems as follows: the rotary type air pressure three-dimensional heat transfer printing unit comprises at least one air pressure heat transfer printing structure, each air pressure heat transfer printing structure comprises a flexible conveying belt, a sprocket for driving the flexible conveying belt to circularly rotate and an air bag, the air bag is arranged on the flexible conveying belt to form an air cavity, and a heater is arranged in the air cavity.
As a further improvement of the technical scheme, a plurality of chain teeth are arranged on the circumference of the chain wheel, a first air inlet control device is arranged on each chain tooth, an air inlet pipe connected with the first air inlet control device is arranged on the circumference of the chain wheel, a plurality of chain grooves matched with the chain teeth are arranged on the inner side surface of the flexible conveying belt, an air inlet hole communicated with the air cavity is arranged on each chain groove, and a second air inlet control device is arranged between each chain groove and the air inlet hole.
As a further improvement of the above technical solution, the first air intake control device includes a first spring, a first piston, a first hole arranged in the sprocket, and a second hole through which the first piston passes, wherein one end of the first piston located in the first hole is provided with a first piston head, the other end of the first piston is provided with a second piston head, the first spring is sleeved on the first piston, one end of the first spring is in press contact with the second piston head, the other end of the first spring is in press contact with the outer surface of the sprocket, the diameter of the second hole is smaller than that of the first hole, and the first piston and the second piston head are internally provided with a first pipeline; the second air inlet control device comprises a second spring, a second piston and a stepped hole arranged in the flexible conveying belt, wherein the stepped hole comprises a third hole close to the second spring, a fourth hole with the diameter larger than that of the third hole and a fifth hole with the diameter smaller than that of the fourth hole, the fifth hole is communicated with a chain groove and the fourth hole, the second piston is internally arranged in the fourth hole, one end of the second piston is inserted into the third hole, a third piston head for blocking the fifth hole is arranged at the other end of the second piston, after the second spring is sleeved on the outer surface of the second piston, one end of the second spring is in press contact with the outer surface of the third piston head, the other end of the second spring is in press contact with a shoulder of the fourth hole, and a second pipeline is arranged in the second piston and the third piston head.
As a further improvement of the technical scheme, the number of the air pressure heat transfer structures is two, and after the two air pressure heat transfer structures are arranged in a lamination mode, a heat transfer working channel is formed between the air bags in the two air pressure heat transfer structures.
As a further improvement of the technical scheme, the heater comprises a plurality of heating pipes arranged on the flexible conveying belt, each heating pipe is provided with two supporting feet, the two supporting feet in the same heating pipe penetrate through the flexible conveying belt and are respectively connected with the conductive metal wheels, the flexible conveying belt is provided with at least one bakelite cross beam, and two conductive rails matched with the conductive metal wheels are arranged on the bakelite cross beam.
As a further improvement of the technical scheme, the two sides of the flexible conveying belt are respectively provided with a caulking groove, and the air chamber is formed after the air bags are arranged on the caulking grooves.
The beneficial effects of the invention are as follows: according to the invention, the air bag is driven to rotate by the flexible conveying belt which circularly rotates, so that the processing process of thermal transfer printing is continuous and uninterrupted, single processing in vacuum thermal transfer printing is replaced, continuous online production of thermal transfer printing processing is realized, and the productivity can be greatly improved; in the thermal transfer production, pneumatic thermal transfer is adopted to replace vacuum thermal transfer, heated air is reserved in the air bag and can be recycled, and the defect that most of heat is taken away by pumping the heated air when the vacuum thermal transfer is vacuumized is overcome. The transfer printing effect can be greatly improved, the heat utilization efficiency is improved, and the cost is reduced; through the lamination of two pneumatic heat transfer structures, the heat transfer film is better contacted with the product by adopting the upper and lower arrangement of air bag extrusion, and the double-sided simultaneous heat transfer is implemented, so that the defect that the traditional process can only realize single-sided heat transfer at each time is overcome, and the production efficiency can be greatly improved; and the pressure of the gas in the air bag can be freely regulated by arranging the first air inlet control device and the second air inlet control device, so that the pressure between the heat transfer film and the product can be accurately controlled. The defect that the pressure cannot be adjusted in the traditional process of vacuumizing and pressing is overcome, and the transfer printing requirements of different transfer printing pressures can be met.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is evident that the drawings described are only some embodiments of the invention, but not all embodiments, and that other designs and drawings can be obtained from these drawings by a person skilled in the art without inventive effort.
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the structure of the sprocket of the present invention;
FIG. 3 is a cross-sectional view of the present invention;
FIG. 4 is a schematic illustration of air intake of an airbag in accordance with the present invention;
FIG. 5 is a second schematic view of air intake of an air bag according to the present invention;
FIG. 6 is a schematic diagram of two pneumatic thermal transfer structures according to the present invention.
Detailed Description
The conception, specific structure, and technical effects produced by the present invention will be clearly and completely described below with reference to the embodiments and the drawings to fully understand the objects, features, and effects of the present invention. It is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and that other embodiments obtained by those skilled in the art without inventive effort are within the scope of the present invention based on the embodiments of the present invention. In addition, all coupling/connection relationships mentioned herein do not refer to direct connection of the components, but rather, refer to the fact that a more optimal coupling structure may be formed by adding or subtracting coupling aids depending on the particular implementation.
Referring to fig. 1 to 6, the rotary type pneumatic three-dimensional thermal transfer unit comprises at least one pneumatic thermal transfer structure, each pneumatic thermal transfer structure comprises a flexible conveying belt 1, a chain wheel 3 for driving the flexible conveying belt 1 to circularly rotate and an air bag 2, wherein the air bag 2 is arranged on the flexible conveying belt 1 to form an air cavity, and a heater is arranged in the air cavity.
As a further improvement of the above technical solution, a plurality of sprockets 34 are arranged on the circumference of the sprocket 3, a first air inlet control device is arranged on each sprocket 34, an air inlet pipe 8 connected with the first air inlet control device is arranged on the circumference of the sprocket 3, a plurality of chain grooves 10 matched with the sprockets 34 are arranged on the inner side surface of the flexible conveying belt 1, an air inlet hole 17 communicated with the air cavity is arranged on each chain groove 10, and a second air inlet control device is arranged between the chain groove 10 and the air inlet hole 17.
Further as a preferred embodiment, the first air inlet control device comprises a first spring 32, a first piston 31, a first hole arranged in the sprocket 34 and a second hole for the first piston 31 to pass through, wherein a first piston head 30 is arranged at one end of the first piston 31 in the first hole, a second piston head 33 is arranged at the other end of the first piston 31, the first spring 32 is sleeved behind the first piston 31, one end of the first spring 32 is in pressing contact with the second piston head 33, the other end of the first spring 32 is in pressing contact with the outer surface of the sprocket 34, the diameter of the second hole is smaller than that of the first hole, and a first pipeline is arranged inside the first piston 31 and the second piston head 33; the second air inlet control device comprises a second spring 14, a second piston 15 and a stepped hole arranged in the flexible conveying belt 1, wherein the stepped hole comprises a third hole 16 close to the stepped hole, a fourth hole 13 with the diameter larger than that of the third hole 16 and a fifth hole 11 with the diameter smaller than that of the fourth hole 13, the fifth hole 11 is communicated with the chain groove 10 and the fourth hole 13, the second piston 15 is arranged in the fourth hole 13, one end of the second piston 15 is inserted into the third hole 16, a third piston head 12 for blocking the fifth hole 11 is arranged at the other end of the second piston 15, after the second spring 14 is sleeved on the outer surface of the second piston 15, one end of the second spring 14 is in pressure contact with the outer surface of the third piston head 12, the other end of the second spring 14 is in pressure contact with a shoulder of the fourth hole 13, and a second pipeline is arranged in the second piston 15 and the third piston head 12. The first hole communicates with the air inlet pipe 8. The inlet of the first line is arranged on the piston rod body of the first piston 31 and the outlet of the first line is arranged on the second piston head 33. The inlet of the second line is arranged on the third piston head 12 and the outlet of the second line is arranged on the piston rod of the second piston 15.
Further as a preferred embodiment, the number of the air pressure heat transfer structures is two, and after the two air pressure heat transfer structures are arranged in a lamination mode, a heat transfer working channel is formed between the air bags 2 in the two air pressure heat transfer structures.
Further as a preferred embodiment, the heater comprises a plurality of heating pipes 4 mounted on the flexible conveying belt 1, each heating pipe 4 is provided with two supporting feet, the two supporting feet in the same heating pipe 4 penetrate through the flexible conveying belt 1 and are respectively connected with the conductive metal wheels 5, the flexible conveying belt 1 is provided with at least one bakelite cross beam 7, and two conductive rails 6 matched with the conductive metal wheels 5 are arranged on the bakelite cross beam 7. Preferably, the electrical rail 6 is a copper rail.
Further as a preferred embodiment, a caulking groove is arranged on both sides of the flexible conveyor belt 1, and the air chamber is formed after the air bags 2 are mounted on the caulking groove.
The following is a description of the mounting of two pneumatic thermal transfer structures to a frame and the configuration of a roll film transport system.
When the flexible conveying belt 1 works, the workpiece material and the heat transfer films positioned on the upper end face and the lower end face of the workpiece material are clamped and conveyed forwards through the rotary motion of the upper air bag 2 and the lower air bag 2. During the conveying process, the gas in the air bag 2 is continuously heated by the heating tube according to the set temperature, and the heating value is controlled by controlling the on and off of the heating tube through the electric guide rail 6. The air bags 2 are inflated through the chain wheels 3, and the air pressure of the air bags 2 is controlled through the electromagnetic valves 9, so that the pressure of the upper air bag 2 and the lower air bag 2 in thermal transfer printing is accurately controlled, and the speed of the upper air bag and the lower air bag is accurately controlled by the servo motor to ensure synchronization. After the thermal transfer is finished, the residual materials of the thermal transfer film which are finished in the transfer work are automatically rolled and recovered, and the rolled sheet which is successfully transferred is driven to be sent out of the equipment through a guide device so as to be convenient for the next processing.
The coiled film conveying system is mainly used for continuously conveying the thermal transfer film and the coiled sheet. The upper film and the lower film are heat transfer coiled films, the two parts are arranged up and down, the coiled sheet is clamped in the middle, heat transfer printing can be simultaneously carried out on the upper surface and the lower surface of the coiled sheet during heat transfer printing, and the conveying speed of the three parts is accurately controlled by respective servo motors so as to ensure synchronous forward conveying during working.
The flexible conveying belt 1 is driven by the chain wheel 3 to move, the air bag 2 is arranged on the flexible conveying belt 1, and the air bag 2 mainly applies pressure to the thermal transfer film and the coiled sheet to carry out compaction operation.
The flexible conveying belt 1 is made of high-temperature-resistant silica gel material embedded reinforcing fibers, a chain groove 10 for transmitting power in a matched mode with the chain wheel 3 is arranged in the flexible conveying belt, and the chain groove 10 is meshed with the chain wheel 3 and then carries out air filling operation on the air bag 2 through an air inlet hole 17.
When the air pressure sensor on the electromagnetic valve 9 detects that the air pressure of the air bag 2 is lower than the standard value, the electromagnetic valve 9 is opened to pump compressed air into the air bag 2 through the chain wheel 3; when the air pressure reaches the standard, the electromagnetic valve 9 is closed.
When the sprocket 34 is not engaged with the flexible conveyor belt 1, the first piston 31 is extended upward by the first spring 32, and at this time, the inlet of the first pipe in the first air piston is blocked by the sprocket 3, and the compressed air cannot pass through. Each chain groove 10 on the flexible conveyor belt 1 is also provided with a second air inlet control device, the second plug extends downwards under the action of the second spring 14, at this time, the outlet of the second pipeline in the second air piston is blocked by the flexible conveyor belt 1, and the air in the air bag 2 is isolated from the outside. When the sprocket 3 starts to engage with the flexible conveyor belt 1, the sprocket 34 of the sprocket 3 approaches the bottom of the chain groove 10, and the second piston head 33 of the first piston 31 comes into contact with the third piston head 12 of the second piston 15. Since the elastic coefficient of the first spring 32 is larger than that of the small spring, the second spring 14 deforms first, and then the first piston 31 pushes the second air piston to move towards the air inlet hole 17 until the outlet in the second pipeline is communicated with the air injection hole of the flexible conveying belt 1. As the engagement proceeds, the second spring 14 is completely overlapped and cannot be deformed, at this time, the second piston 15 pushes the first piston 31 downward, and the first spring 32 starts to be deformed until the inlet in the first pipe is connected to the first hole, so that the compressed air passing through the solenoid valve 9 can pass through the first hole, the first pipe, the fourth hole 13, the second pipe and the air inlet hole 17 in order, and finally be charged into the airbag 2. After the air passage is communicated, the air pressure sensor on the electromagnetic valve 9 detects whether the air pressure of the air bag 2 reaches the standard, and if the air pressure does not reach the standard, the air is inflated and pressurized.
The air temperature in the air bag 2 is regulated by continuous power supply and heating of the heating pipe so as to ensure the optimal heat transfer temperature. Heating pipes are arranged on the flexible conveying belt 1 at equal intervals, conductive metal wheels 5 capable of freely rolling are arranged on the anode and the cathode of each heating pipe, two electric guide rails 6 are arranged on the frame at positions corresponding to the conductive metal wheels 5, and the two electric guide rails 6 are respectively connected with the anode and the cathode of a power supply. The two electric guide rails 6 are arranged on the bakelite cross beam 7 and isolated from the frame so as to ensure the safety of electricity. When the flexible conveying belt 1 moves, the heating pipe is driven to move back and forth between the two chain wheels 3, and the heating pipe is kept in contact with the electric guide rail in the upper and lower strokes so as to ensure stable power supply.
While the preferred embodiments of the present application have been illustrated and described, the present application is not limited to the embodiments, and various equivalent modifications and substitutions can be made by one skilled in the art without departing from the spirit of the present application, and these equivalent modifications and substitutions are intended to be included in the scope of the present application as defined in the appended claims.
Claims (1)
1. The rotary pneumatic three-dimensional heat transfer printing unit is characterized in that: the device comprises at least one pneumatic heat transfer structure, wherein each pneumatic heat transfer structure comprises a flexible conveying belt, a chain wheel for driving the flexible conveying belt to circularly rotate and an air bag, the air bag is arranged on the flexible conveying belt to form an air cavity, and a heater is arranged in the air cavity;
A plurality of chain teeth are arranged on the circumference of the chain wheel, a first air inlet control device is arranged on each chain tooth, an air inlet pipe connected with the first air inlet control device is arranged on the circumference of the chain wheel, a plurality of chain grooves matched with the chain teeth are arranged on the inner side surface of the flexible conveying belt, an air inlet hole communicated with the air cavity is arranged on each chain groove, and a second air inlet control device is arranged between each chain groove and the air inlet hole;
The first air inlet control device comprises a first spring, a first piston, a first hole and a second hole, wherein the first hole is arranged in the sprocket, the second hole is penetrated by the first piston, one end of the first piston, which is positioned in the first hole, is provided with a first piston head, the other end of the first piston is provided with a second piston head, the first spring is sleeved on the first piston, one end of the first spring is in pressure contact with the second piston head, the other end of the first spring is in pressure contact with the outer surface of the sprocket, the diameter of the second hole is smaller than that of the first hole, and a first pipeline is arranged inside the first piston and the second piston head; the second air inlet control device comprises a second spring, a second piston and a stepped hole arranged in the flexible conveying belt, wherein the stepped hole comprises a third hole close to the second spring, a fourth hole with a larger diameter than the third hole and a fifth hole with a smaller diameter than the fourth hole, the fifth hole is communicated with a chain groove and the fourth hole, the second piston is internally arranged in the fourth hole, one end of the second piston is inserted into the third hole, a third piston head for blocking the fifth hole is arranged at the other end of the second piston, after the second spring is sleeved on the outer surface of the second piston, one end of the second spring is in pressure contact with the outer surface of the third piston head, the other end of the second spring is in pressure contact with a shoulder of the fourth hole, and a second pipeline is arranged in the second piston and the third piston head;
The number of the air pressure heat transfer structures is two, and after the two air pressure heat transfer structures are arranged in a lamination mode, a heat transfer working channel is formed between air bags in the two air pressure heat transfer structures;
The heater comprises a plurality of heating pipes arranged on a flexible conveying belt, wherein each heating pipe is provided with two supporting feet, the two supporting feet in the same heating pipe penetrate through the flexible conveying belt and are respectively connected with a conductive metal wheel, the flexible conveying belt is provided with at least one bakelite beam, and two conductive rails matched with the conductive metal wheels are arranged on the bakelite beam;
The two sides of the flexible conveying belt are respectively provided with a caulking groove, and the air chamber is formed after the air bags are arranged on the caulking grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810425925.9A CN108528012B (en) | 2018-05-07 | Rotary pneumatic three-dimensional heat transfer printing unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810425925.9A CN108528012B (en) | 2018-05-07 | Rotary pneumatic three-dimensional heat transfer printing unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108528012A CN108528012A (en) | 2018-09-14 |
| CN108528012B true CN108528012B (en) | 2024-07-16 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210733544U (en) * | 2018-05-07 | 2020-06-12 | 广东水利电力职业技术学院（广东省水利电力技工学校） | Rotary air pressure three-dimensional thermal transfer unit |
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210733544U (en) * | 2018-05-07 | 2020-06-12 | 广东水利电力职业技术学院（广东省水利电力技工学校） | Rotary air pressure three-dimensional thermal transfer unit |
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